diff options
Diffstat (limited to 'net/sunrpc')
35 files changed, 1811 insertions, 1667 deletions
diff --git a/net/sunrpc/Kconfig b/net/sunrpc/Kconfig index 241b54f3020..0754d0f466d 100644 --- a/net/sunrpc/Kconfig +++ b/net/sunrpc/Kconfig @@ -9,19 +9,6 @@ config SUNRPC_BACKCHANNEL bool depends on SUNRPC -config SUNRPC_XPRT_RDMA - tristate - depends on SUNRPC && INFINIBAND && INFINIBAND_ADDR_TRANS - default SUNRPC && INFINIBAND - help - This option allows the NFS client and server to support - an RDMA-enabled transport. - - To compile RPC client RDMA transport support as a module, - choose M here: the module will be called xprtrdma. - - If unsure, say N. - config SUNRPC_SWAP bool depends on SUNRPC @@ -57,3 +44,29 @@ config SUNRPC_DEBUG but makes troubleshooting NFS issues significantly harder. If unsure, say Y. + +config SUNRPC_XPRT_RDMA_CLIENT + tristate "RPC over RDMA Client Support" + depends on SUNRPC && INFINIBAND && INFINIBAND_ADDR_TRANS + default SUNRPC && INFINIBAND + help + This option allows the NFS client to support an RDMA-enabled + transport. + + To compile RPC client RDMA transport support as a module, + choose M here: the module will be called xprtrdma. + + If unsure, say N. + +config SUNRPC_XPRT_RDMA_SERVER + tristate "RPC over RDMA Server Support" + depends on SUNRPC && INFINIBAND && INFINIBAND_ADDR_TRANS + default SUNRPC && INFINIBAND + help + This option allows the NFS server to support an RDMA-enabled + transport. + + To compile RPC server RDMA transport support as a module, + choose M here: the module will be called svcrdma. + + If unsure, say N. diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile index 8209a0411bc..e5a7a1cac8f 100644 --- a/net/sunrpc/Makefile +++ b/net/sunrpc/Makefile @@ -5,7 +5,8 @@ obj-$(CONFIG_SUNRPC) += sunrpc.o obj-$(CONFIG_SUNRPC_GSS) += auth_gss/ -obj-$(CONFIG_SUNRPC_XPRT_RDMA) += xprtrdma/ + +obj-y += xprtrdma/ sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \ auth.o auth_null.o auth_unix.o auth_generic.o \ diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 5285ead196c..f7736671742 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -296,7 +296,7 @@ static void rpcauth_unhash_cred_locked(struct rpc_cred *cred) { hlist_del_rcu(&cred->cr_hash); - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags); } @@ -592,6 +592,7 @@ rpcauth_lookupcred(struct rpc_auth *auth, int flags) put_group_info(acred.group_info); return ret; } +EXPORT_SYMBOL_GPL(rpcauth_lookupcred); void rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred, diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index fcac5d14171..b6e440baccc 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -108,6 +108,7 @@ struct gss_auth { static DEFINE_SPINLOCK(pipe_version_lock); static struct rpc_wait_queue pipe_version_rpc_waitqueue; static DECLARE_WAIT_QUEUE_HEAD(pipe_version_waitqueue); +static void gss_put_auth(struct gss_auth *gss_auth); static void gss_free_ctx(struct gss_cl_ctx *); static const struct rpc_pipe_ops gss_upcall_ops_v0; @@ -142,7 +143,7 @@ gss_cred_set_ctx(struct rpc_cred *cred, struct gss_cl_ctx *ctx) gss_get_ctx(ctx); rcu_assign_pointer(gss_cred->gc_ctx, ctx); set_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags); - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(RPCAUTH_CRED_NEW, &cred->cr_flags); } @@ -320,6 +321,7 @@ gss_release_msg(struct gss_upcall_msg *gss_msg) if (gss_msg->ctx != NULL) gss_put_ctx(gss_msg->ctx); rpc_destroy_wait_queue(&gss_msg->rpc_waitqueue); + gss_put_auth(gss_msg->auth); kfree(gss_msg); } @@ -420,41 +422,53 @@ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg) memcpy(gss_msg->databuf, &uid, sizeof(uid)); gss_msg->msg.data = gss_msg->databuf; gss_msg->msg.len = sizeof(uid); - BUG_ON(sizeof(uid) > UPCALL_BUF_LEN); + + BUILD_BUG_ON(sizeof(uid) > sizeof(gss_msg->databuf)); } -static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, +static int gss_encode_v1_msg(struct gss_upcall_msg *gss_msg, const char *service_name, const char *target_name) { struct gss_api_mech *mech = gss_msg->auth->mech; char *p = gss_msg->databuf; - int len = 0; - - gss_msg->msg.len = sprintf(gss_msg->databuf, "mech=%s uid=%d ", - mech->gm_name, - from_kuid(&init_user_ns, gss_msg->uid)); - p += gss_msg->msg.len; + size_t buflen = sizeof(gss_msg->databuf); + int len; + + len = scnprintf(p, buflen, "mech=%s uid=%d ", mech->gm_name, + from_kuid(&init_user_ns, gss_msg->uid)); + buflen -= len; + p += len; + gss_msg->msg.len = len; if (target_name) { - len = sprintf(p, "target=%s ", target_name); + len = scnprintf(p, buflen, "target=%s ", target_name); + buflen -= len; p += len; gss_msg->msg.len += len; } if (service_name != NULL) { - len = sprintf(p, "service=%s ", service_name); + len = scnprintf(p, buflen, "service=%s ", service_name); + buflen -= len; p += len; gss_msg->msg.len += len; } if (mech->gm_upcall_enctypes) { - len = sprintf(p, "enctypes=%s ", mech->gm_upcall_enctypes); + len = scnprintf(p, buflen, "enctypes=%s ", + mech->gm_upcall_enctypes); + buflen -= len; p += len; gss_msg->msg.len += len; } - len = sprintf(p, "\n"); + len = scnprintf(p, buflen, "\n"); + if (len == 0) + goto out_overflow; gss_msg->msg.len += len; gss_msg->msg.data = gss_msg->databuf; - BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN); + return 0; +out_overflow: + WARN_ON_ONCE(1); + return -ENOMEM; } static struct gss_upcall_msg * @@ -463,15 +477,15 @@ gss_alloc_msg(struct gss_auth *gss_auth, { struct gss_upcall_msg *gss_msg; int vers; + int err = -ENOMEM; gss_msg = kzalloc(sizeof(*gss_msg), GFP_NOFS); if (gss_msg == NULL) - return ERR_PTR(-ENOMEM); + goto err; vers = get_pipe_version(gss_auth->net); - if (vers < 0) { - kfree(gss_msg); - return ERR_PTR(vers); - } + err = vers; + if (err < 0) + goto err_free_msg; gss_msg->pipe = gss_auth->gss_pipe[vers]->pipe; INIT_LIST_HEAD(&gss_msg->list); rpc_init_wait_queue(&gss_msg->rpc_waitqueue, "RPCSEC_GSS upcall waitq"); @@ -482,10 +496,20 @@ gss_alloc_msg(struct gss_auth *gss_auth, switch (vers) { case 0: gss_encode_v0_msg(gss_msg); + break; default: - gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); + err = gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name); + if (err) + goto err_put_pipe_version; }; + kref_get(&gss_auth->kref); return gss_msg; +err_put_pipe_version: + put_pipe_version(gss_auth->net); +err_free_msg: + kfree(gss_msg); +err: + return ERR_PTR(err); } static struct gss_upcall_msg * @@ -513,14 +537,7 @@ gss_setup_upcall(struct gss_auth *gss_auth, struct rpc_cred *cred) static void warn_gssd(void) { - static unsigned long ratelimit; - unsigned long now = jiffies; - - if (time_after(now, ratelimit)) { - printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n" - "Please check user daemon is running.\n"); - ratelimit = now + 15*HZ; - } + dprintk("AUTH_GSS upcall failed. Please check user daemon is running.\n"); } static inline int @@ -581,7 +598,6 @@ gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) struct rpc_pipe *pipe; struct rpc_cred *cred = &gss_cred->gc_base; struct gss_upcall_msg *gss_msg; - unsigned long timeout; DEFINE_WAIT(wait); int err; @@ -589,17 +605,16 @@ gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred) __func__, from_kuid(&init_user_ns, cred->cr_uid)); retry: err = 0; - /* Default timeout is 15s unless we know that gssd is not running */ - timeout = 15 * HZ; - if (!sn->gssd_running) - timeout = HZ >> 2; + /* if gssd is down, just skip upcalling altogether */ + if (!gssd_running(net)) { + warn_gssd(); + return -EACCES; + } gss_msg = gss_setup_upcall(gss_auth, cred); if (PTR_ERR(gss_msg) == -EAGAIN) { err = wait_event_interruptible_timeout(pipe_version_waitqueue, - sn->pipe_version >= 0, timeout); + sn->pipe_version >= 0, 15 * HZ); if (sn->pipe_version < 0) { - if (err == 0) - sn->gssd_running = 0; warn_gssd(); err = -EACCES; } @@ -981,6 +996,8 @@ gss_create_new(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) gss_auth->service = gss_pseudoflavor_to_service(gss_auth->mech, flavor); if (gss_auth->service == 0) goto err_put_mech; + if (!gssd_running(gss_auth->net)) + goto err_put_mech; auth = &gss_auth->rpc_auth; auth->au_cslack = GSS_CRED_SLACK >> 2; auth->au_rslack = GSS_VERF_SLACK >> 2; @@ -1052,6 +1069,12 @@ gss_free_callback(struct kref *kref) } static void +gss_put_auth(struct gss_auth *gss_auth) +{ + kref_put(&gss_auth->kref, gss_free_callback); +} + +static void gss_destroy(struct rpc_auth *auth) { struct gss_auth *gss_auth = container_of(auth, @@ -1072,9 +1095,18 @@ gss_destroy(struct rpc_auth *auth) gss_auth->gss_pipe[1] = NULL; rpcauth_destroy_credcache(auth); - kref_put(&gss_auth->kref, gss_free_callback); + gss_put_auth(gss_auth); } +/* + * Auths may be shared between rpc clients that were cloned from a + * common client with the same xprt, if they also share the flavor and + * target_name. + * + * The auth is looked up from the oldest parent sharing the same + * cl_xprt, and the auth itself references only that common parent + * (which is guaranteed to last as long as any of its descendants). + */ static struct gss_auth * gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, struct rpc_clnt *clnt, @@ -1088,6 +1120,8 @@ gss_auth_find_or_add_hashed(struct rpc_auth_create_args *args, gss_auth, hash, hashval) { + if (gss_auth->client != clnt) + continue; if (gss_auth->rpc_auth.au_flavor != args->pseudoflavor) continue; if (gss_auth->target_name != args->target_name) { @@ -1232,7 +1266,7 @@ gss_destroy_nullcred(struct rpc_cred *cred) call_rcu(&cred->cr_rcu, gss_free_cred_callback); if (ctx) gss_put_ctx(ctx); - kref_put(&gss_auth->kref, gss_free_callback); + gss_put_auth(gss_auth); } static void @@ -1487,7 +1521,7 @@ out: static int gss_refresh_null(struct rpc_task *task) { - return -EACCES; + return 0; } static __be32 * diff --git a/net/sunrpc/auth_gss/gss_krb5_keys.c b/net/sunrpc/auth_gss/gss_krb5_keys.c index 76e42e6be75..24589bd2a4b 100644 --- a/net/sunrpc/auth_gss/gss_krb5_keys.c +++ b/net/sunrpc/auth_gss/gss_krb5_keys.c @@ -59,6 +59,7 @@ #include <linux/crypto.h> #include <linux/sunrpc/gss_krb5.h> #include <linux/sunrpc/xdr.h> +#include <linux/lcm.h> #ifdef RPC_DEBUG # define RPCDBG_FACILITY RPCDBG_AUTH @@ -72,7 +73,7 @@ static void krb5_nfold(u32 inbits, const u8 *in, u32 outbits, u8 *out) { - int a, b, c, lcm; + unsigned long ulcm; int byte, i, msbit; /* the code below is more readable if I make these bytes @@ -82,17 +83,7 @@ static void krb5_nfold(u32 inbits, const u8 *in, outbits >>= 3; /* first compute lcm(n,k) */ - - a = outbits; - b = inbits; - - while (b != 0) { - c = b; - b = a%b; - a = c; - } - - lcm = outbits*inbits/a; + ulcm = lcm(inbits, outbits); /* now do the real work */ @@ -101,7 +92,7 @@ static void krb5_nfold(u32 inbits, const u8 *in, /* this will end up cycling through k lcm(k,n)/k times, which is correct */ - for (i = lcm-1; i >= 0; i--) { + for (i = ulcm-1; i >= 0; i--) { /* compute the msbit in k which gets added into this byte */ msbit = ( /* first, start with the msbit in the first, diff --git a/net/sunrpc/auth_gss/gss_krb5_unseal.c b/net/sunrpc/auth_gss/gss_krb5_unseal.c index 6cd930f3678..6c981ddc19f 100644 --- a/net/sunrpc/auth_gss/gss_krb5_unseal.c +++ b/net/sunrpc/auth_gss/gss_krb5_unseal.c @@ -150,7 +150,6 @@ gss_verify_mic_v2(struct krb5_ctx *ctx, struct xdr_netobj cksumobj = {.len = sizeof(cksumdata), .data = cksumdata}; s32 now; - u64 seqnum; u8 *ptr = read_token->data; u8 *cksumkey; u8 flags; @@ -197,9 +196,10 @@ gss_verify_mic_v2(struct krb5_ctx *ctx, if (now > ctx->endtime) return GSS_S_CONTEXT_EXPIRED; - /* do sequencing checks */ - - seqnum = be64_to_cpup((__be64 *)ptr + 8); + /* + * NOTE: the sequence number at ptr + 8 is skipped, rpcsec_gss + * doesn't want it checked; see page 6 of rfc 2203. + */ return GSS_S_COMPLETE; } diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c index 1da52d1406f..42560e55d97 100644 --- a/net/sunrpc/auth_gss/gss_krb5_wrap.c +++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c @@ -489,7 +489,6 @@ static u32 gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf) { s32 now; - u64 seqnum; u8 *ptr; u8 flags = 0x00; u16 ec, rrc; @@ -525,7 +524,10 @@ gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf) ec = be16_to_cpup((__be16 *)(ptr + 4)); rrc = be16_to_cpup((__be16 *)(ptr + 6)); - seqnum = be64_to_cpup((__be64 *)(ptr + 8)); + /* + * NOTE: the sequence number at ptr + 8 is skipped, rpcsec_gss + * doesn't want it checked; see page 6 of rfc 2203. + */ if (rrc != 0) rotate_left(offset + 16, buf, rrc); @@ -574,8 +576,8 @@ gss_unwrap_kerberos_v2(struct krb5_ctx *kctx, int offset, struct xdr_buf *buf) buf->head[0].iov_len -= GSS_KRB5_TOK_HDR_LEN + headskip; buf->len -= GSS_KRB5_TOK_HDR_LEN + headskip; - /* Trim off the checksum blob */ - xdr_buf_trim(buf, GSS_KRB5_TOK_HDR_LEN + tailskip); + /* Trim off the trailing "extra count" and checksum blob */ + xdr_buf_trim(buf, ec + GSS_KRB5_TOK_HDR_LEN + tailskip); return GSS_S_COMPLETE; } diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c index 27ce2624093..92d5ab99fbf 100644 --- a/net/sunrpc/auth_gss/gss_mech_switch.c +++ b/net/sunrpc/auth_gss/gss_mech_switch.c @@ -218,10 +218,8 @@ static struct gss_api_mech *_gss_mech_get_by_pseudoflavor(u32 pseudoflavor) spin_lock(®istered_mechs_lock); list_for_each_entry(pos, ®istered_mechs, gm_list) { - if (!mech_supports_pseudoflavor(pos, pseudoflavor)) { - module_put(pos->gm_owner); + if (!mech_supports_pseudoflavor(pos, pseudoflavor)) continue; - } if (try_module_get(pos->gm_owner)) gm = pos; break; diff --git a/net/sunrpc/auth_gss/gss_rpc_upcall.c b/net/sunrpc/auth_gss/gss_rpc_upcall.c index f1eb0d16666..abbb7dcd168 100644 --- a/net/sunrpc/auth_gss/gss_rpc_upcall.c +++ b/net/sunrpc/auth_gss/gss_rpc_upcall.c @@ -137,7 +137,6 @@ void init_gssp_clnt(struct sunrpc_net *sn) { mutex_init(&sn->gssp_lock); sn->gssp_clnt = NULL; - init_waitqueue_head(&sn->gssp_wq); } int set_gssp_clnt(struct net *net) @@ -154,7 +153,6 @@ int set_gssp_clnt(struct net *net) sn->gssp_clnt = clnt; } mutex_unlock(&sn->gssp_lock); - wake_up(&sn->gssp_wq); return ret; } @@ -298,7 +296,8 @@ int gssp_accept_sec_context_upcall(struct net *net, if (res.context_handle) { data->out_handle = rctxh.exported_context_token; data->mech_oid.len = rctxh.mech.len; - memcpy(data->mech_oid.data, rctxh.mech.data, + if (rctxh.mech.data) + memcpy(data->mech_oid.data, rctxh.mech.data, data->mech_oid.len); client_name = rctxh.src_name.display_name; } diff --git a/net/sunrpc/auth_gss/gss_rpc_xdr.c b/net/sunrpc/auth_gss/gss_rpc_xdr.c index f0f78c5f1c7..1ec19f6f0c2 100644 --- a/net/sunrpc/auth_gss/gss_rpc_xdr.c +++ b/net/sunrpc/auth_gss/gss_rpc_xdr.c @@ -559,6 +559,8 @@ static int gssx_enc_cred(struct xdr_stream *xdr, /* cred->elements */ err = dummy_enc_credel_array(xdr, &cred->elements); + if (err) + return err; /* cred->cred_handle_reference */ err = gssx_enc_buffer(xdr, &cred->cred_handle_reference); @@ -740,22 +742,20 @@ void gssx_enc_accept_sec_context(struct rpc_rqst *req, goto done; /* arg->context_handle */ - if (arg->context_handle) { + if (arg->context_handle) err = gssx_enc_ctx(xdr, arg->context_handle); - if (err) - goto done; - } else { + else err = gssx_enc_bool(xdr, 0); - } + if (err) + goto done; /* arg->cred_handle */ - if (arg->cred_handle) { + if (arg->cred_handle) err = gssx_enc_cred(xdr, arg->cred_handle); - if (err) - goto done; - } else { + else err = gssx_enc_bool(xdr, 0); - } + if (err) + goto done; /* arg->input_token */ err = gssx_enc_in_token(xdr, &arg->input_token); @@ -763,13 +763,12 @@ void gssx_enc_accept_sec_context(struct rpc_rqst *req, goto done; /* arg->input_cb */ - if (arg->input_cb) { + if (arg->input_cb) err = gssx_enc_cb(xdr, arg->input_cb); - if (err) - goto done; - } else { + else err = gssx_enc_bool(xdr, 0); - } + if (err) + goto done; err = gssx_enc_bool(xdr, arg->ret_deleg_cred); if (err) diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 09fb638bcaa..4ce5eccec1f 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1167,8 +1167,8 @@ static int gss_proxy_save_rsc(struct cache_detail *cd, if (!ud->found_creds) { /* userspace seem buggy, we should always get at least a * mapping to nobody */ - dprintk("RPC: No creds found, marking Negative!\n"); - set_bit(CACHE_NEGATIVE, &rsci.h.flags); + dprintk("RPC: No creds found!\n"); + goto out; } else { /* steal creds */ @@ -1263,65 +1263,34 @@ out: return ret; } -DEFINE_SPINLOCK(use_gssp_lock); - -static bool use_gss_proxy(struct net *net) -{ - struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); - - if (sn->use_gss_proxy != -1) - return sn->use_gss_proxy; - spin_lock(&use_gssp_lock); - /* - * If you wanted gss-proxy, you should have said so before - * starting to accept requests: - */ - sn->use_gss_proxy = 0; - spin_unlock(&use_gssp_lock); - return 0; -} - -#ifdef CONFIG_PROC_FS - +/* + * Try to set the sn->use_gss_proxy variable to a new value. We only allow + * it to be changed if it's currently undefined (-1). If it's any other value + * then return -EBUSY unless the type wouldn't have changed anyway. + */ static int set_gss_proxy(struct net *net, int type) { struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); - int ret = 0; + int ret; WARN_ON_ONCE(type != 0 && type != 1); - spin_lock(&use_gssp_lock); - if (sn->use_gss_proxy == -1 || sn->use_gss_proxy == type) - sn->use_gss_proxy = type; - else - ret = -EBUSY; - spin_unlock(&use_gssp_lock); - wake_up(&sn->gssp_wq); - return ret; -} - -static inline bool gssp_ready(struct sunrpc_net *sn) -{ - switch (sn->use_gss_proxy) { - case -1: - return false; - case 0: - return true; - case 1: - return sn->gssp_clnt; - } - WARN_ON_ONCE(1); - return false; + ret = cmpxchg(&sn->use_gss_proxy, -1, type); + if (ret != -1 && ret != type) + return -EBUSY; + return 0; } -static int wait_for_gss_proxy(struct net *net, struct file *file) +static bool use_gss_proxy(struct net *net) { struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); - if (file->f_flags & O_NONBLOCK && !gssp_ready(sn)) - return -EAGAIN; - return wait_event_interruptible(sn->gssp_wq, gssp_ready(sn)); + /* If use_gss_proxy is still undefined, then try to disable it */ + if (sn->use_gss_proxy == -1) + set_gss_proxy(net, 0); + return sn->use_gss_proxy; } +#ifdef CONFIG_PROC_FS static ssize_t write_gssp(struct file *file, const char __user *buf, size_t count, loff_t *ppos) @@ -1342,10 +1311,10 @@ static ssize_t write_gssp(struct file *file, const char __user *buf, return res; if (i != 1) return -EINVAL; - res = set_gss_proxy(net, 1); + res = set_gssp_clnt(net); if (res) return res; - res = set_gssp_clnt(net); + res = set_gss_proxy(net, 1); if (res) return res; return count; @@ -1355,16 +1324,12 @@ static ssize_t read_gssp(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct net *net = PDE_DATA(file_inode(file)); + struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); unsigned long p = *ppos; char tbuf[10]; size_t len; - int ret; - ret = wait_for_gss_proxy(net, file); - if (ret) - return ret; - - snprintf(tbuf, sizeof(tbuf), "%d\n", use_gss_proxy(net)); + snprintf(tbuf, sizeof(tbuf), "%d\n", sn->use_gss_proxy); len = strlen(tbuf); if (p >= len) return 0; @@ -1538,6 +1503,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) if (unwrap_integ_data(rqstp, &rqstp->rq_arg, gc->gc_seq, rsci->mechctx)) goto garbage_args; + rqstp->rq_auth_slack = RPC_MAX_AUTH_SIZE; break; case RPC_GSS_SVC_PRIVACY: /* placeholders for length and seq. number: */ @@ -1546,6 +1512,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp) if (unwrap_priv_data(rqstp, &rqstp->rq_arg, gc->gc_seq, rsci->mechctx)) goto garbage_args; + rqstp->rq_auth_slack = RPC_MAX_AUTH_SIZE * 2; break; default: goto auth_err; @@ -1626,8 +1593,7 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp) BUG_ON(integ_len % 4); *p++ = htonl(integ_len); *p++ = htonl(gc->gc_seq); - if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, - integ_len)) + if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset, integ_len)) BUG(); if (resbuf->tail[0].iov_base == NULL) { if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE) @@ -1635,10 +1601,8 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp) resbuf->tail[0].iov_base = resbuf->head[0].iov_base + resbuf->head[0].iov_len; resbuf->tail[0].iov_len = 0; - resv = &resbuf->tail[0]; - } else { - resv = &resbuf->tail[0]; } + resv = &resbuf->tail[0]; mic.data = (u8 *)resv->iov_base + resv->iov_len + 4; if (gss_get_mic(gsd->rsci->mechctx, &integ_buf, &mic)) goto out_err; diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c index 890a29912d5..9761a0da964 100644 --- a/net/sunrpc/backchannel_rqst.c +++ b/net/sunrpc/backchannel_rqst.c @@ -64,7 +64,6 @@ static void xprt_free_allocation(struct rpc_rqst *req) free_page((unsigned long)xbufp->head[0].iov_base); xbufp = &req->rq_snd_buf; free_page((unsigned long)xbufp->head[0].iov_base); - list_del(&req->rq_bc_pa_list); kfree(req); } @@ -168,8 +167,10 @@ out_free: /* * Memory allocation failed, free the temporary list */ - list_for_each_entry_safe(req, tmp, &tmp_list, rq_bc_pa_list) + list_for_each_entry_safe(req, tmp, &tmp_list, rq_bc_pa_list) { + list_del(&req->rq_bc_pa_list); xprt_free_allocation(req); + } dprintk("RPC: setup backchannel transport failed\n"); return -ENOMEM; @@ -198,6 +199,7 @@ void xprt_destroy_backchannel(struct rpc_xprt *xprt, unsigned int max_reqs) xprt_dec_alloc_count(xprt, max_reqs); list_for_each_entry_safe(req, tmp, &xprt->bc_pa_list, rq_bc_pa_list) { dprintk("RPC: req=%p\n", req); + list_del(&req->rq_bc_pa_list); xprt_free_allocation(req); if (--max_reqs == 0) break; @@ -210,39 +212,23 @@ out: } EXPORT_SYMBOL_GPL(xprt_destroy_backchannel); -/* - * One or more rpc_rqst structure have been preallocated during the - * backchannel setup. Buffer space for the send and private XDR buffers - * has been preallocated as well. Use xprt_alloc_bc_request to allocate - * to this request. Use xprt_free_bc_request to return it. - * - * We know that we're called in soft interrupt context, grab the spin_lock - * since there is no need to grab the bottom half spin_lock. - * - * Return an available rpc_rqst, otherwise NULL if non are available. - */ -struct rpc_rqst *xprt_alloc_bc_request(struct rpc_xprt *xprt) +static struct rpc_rqst *xprt_alloc_bc_request(struct rpc_xprt *xprt, __be32 xid) { - struct rpc_rqst *req; + struct rpc_rqst *req = NULL; dprintk("RPC: allocate a backchannel request\n"); - spin_lock(&xprt->bc_pa_lock); - if (!list_empty(&xprt->bc_pa_list)) { - req = list_first_entry(&xprt->bc_pa_list, struct rpc_rqst, - rq_bc_pa_list); - list_del(&req->rq_bc_pa_list); - } else { - req = NULL; - } - spin_unlock(&xprt->bc_pa_lock); + if (list_empty(&xprt->bc_pa_list)) + goto not_found; - if (req != NULL) { - set_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); - req->rq_reply_bytes_recvd = 0; - req->rq_bytes_sent = 0; - memcpy(&req->rq_private_buf, &req->rq_rcv_buf, + req = list_first_entry(&xprt->bc_pa_list, struct rpc_rqst, + rq_bc_pa_list); + req->rq_reply_bytes_recvd = 0; + req->rq_bytes_sent = 0; + memcpy(&req->rq_private_buf, &req->rq_rcv_buf, sizeof(req->rq_private_buf)); - } + req->rq_xid = xid; + req->rq_connect_cookie = xprt->connect_cookie; +not_found: dprintk("RPC: backchannel req=%p\n", req); return req; } @@ -257,10 +243,11 @@ void xprt_free_bc_request(struct rpc_rqst *req) dprintk("RPC: free backchannel req=%p\n", req); - smp_mb__before_clear_bit(); + req->rq_connect_cookie = xprt->connect_cookie - 1; + smp_mb__before_atomic(); WARN_ON_ONCE(!test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state)); clear_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); if (!xprt_need_to_requeue(xprt)) { /* @@ -279,7 +266,57 @@ void xprt_free_bc_request(struct rpc_rqst *req) * may be reused by a new callback request. */ spin_lock_bh(&xprt->bc_pa_lock); - list_add(&req->rq_bc_pa_list, &xprt->bc_pa_list); + list_add_tail(&req->rq_bc_pa_list, &xprt->bc_pa_list); spin_unlock_bh(&xprt->bc_pa_lock); } +/* + * One or more rpc_rqst structure have been preallocated during the + * backchannel setup. Buffer space for the send and private XDR buffers + * has been preallocated as well. Use xprt_alloc_bc_request to allocate + * to this request. Use xprt_free_bc_request to return it. + * + * We know that we're called in soft interrupt context, grab the spin_lock + * since there is no need to grab the bottom half spin_lock. + * + * Return an available rpc_rqst, otherwise NULL if non are available. + */ +struct rpc_rqst *xprt_lookup_bc_request(struct rpc_xprt *xprt, __be32 xid) +{ + struct rpc_rqst *req; + + spin_lock(&xprt->bc_pa_lock); + list_for_each_entry(req, &xprt->bc_pa_list, rq_bc_pa_list) { + if (req->rq_connect_cookie != xprt->connect_cookie) + continue; + if (req->rq_xid == xid) + goto found; + } + req = xprt_alloc_bc_request(xprt, xid); +found: + spin_unlock(&xprt->bc_pa_lock); + return req; +} + +/* + * Add callback request to callback list. The callback + * service sleeps on the sv_cb_waitq waiting for new + * requests. Wake it up after adding enqueing the + * request. + */ +void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied) +{ + struct rpc_xprt *xprt = req->rq_xprt; + struct svc_serv *bc_serv = xprt->bc_serv; + + req->rq_private_buf.len = copied; + set_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); + + dprintk("RPC: add callback request to list\n"); + spin_lock(&bc_serv->sv_cb_lock); + list_del(&req->rq_bc_pa_list); + list_add(&req->rq_bc_list, &bc_serv->sv_cb_list); + wake_up(&bc_serv->sv_cb_waitq); + spin_unlock(&bc_serv->sv_cb_lock); +} + diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index a72de074172..06636214113 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -374,7 +374,7 @@ void sunrpc_destroy_cache_detail(struct cache_detail *cd) } return; out: - printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name); + printk(KERN_ERR "RPC: failed to unregister %s cache\n", cd->name); } EXPORT_SYMBOL_GPL(sunrpc_destroy_cache_detail); @@ -619,7 +619,7 @@ static void cache_limit_defers(void) /* Consider removing either the first or the last */ if (cache_defer_cnt > DFR_MAX) { - if (net_random() & 1) + if (prandom_u32() & 1) discard = list_entry(cache_defer_list.next, struct cache_deferred_req, recent); else @@ -1111,9 +1111,7 @@ void qword_addhex(char **bpp, int *lp, char *buf, int blen) *bp++ = 'x'; len -= 2; while (blen && len >= 2) { - unsigned char c = *buf++; - *bp++ = '0' + ((c&0xf0)>>4) + (c>=0xa0)*('a'-'9'-1); - *bp++ = '0' + (c&0x0f) + ((c&0x0f)>=0x0a)*('a'-'9'-1); + bp = hex_byte_pack(bp, *buf++); len -= 2; blen--; } diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 77479606a97..2e6ab10734f 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -25,12 +25,12 @@ #include <linux/namei.h> #include <linux/mount.h> #include <linux/slab.h> +#include <linux/rcupdate.h> #include <linux/utsname.h> #include <linux/workqueue.h> #include <linux/in.h> #include <linux/in6.h> #include <linux/un.h> -#include <linux/rcupdate.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/addr.h> @@ -264,6 +264,26 @@ void rpc_clients_notifier_unregister(void) return rpc_pipefs_notifier_unregister(&rpc_clients_block); } +static struct rpc_xprt *rpc_clnt_set_transport(struct rpc_clnt *clnt, + struct rpc_xprt *xprt, + const struct rpc_timeout *timeout) +{ + struct rpc_xprt *old; + + spin_lock(&clnt->cl_lock); + old = rcu_dereference_protected(clnt->cl_xprt, + lockdep_is_held(&clnt->cl_lock)); + + if (!xprt_bound(xprt)) + clnt->cl_autobind = 1; + + clnt->cl_timeout = timeout; + rcu_assign_pointer(clnt->cl_xprt, xprt); + spin_unlock(&clnt->cl_lock); + + return old; +} + static void rpc_clnt_set_nodename(struct rpc_clnt *clnt, const char *nodename) { clnt->cl_nodelen = strlen(nodename); @@ -272,12 +292,13 @@ static void rpc_clnt_set_nodename(struct rpc_clnt *clnt, const char *nodename) memcpy(clnt->cl_nodename, nodename, clnt->cl_nodelen); } -static int rpc_client_register(const struct rpc_create_args *args, - struct rpc_clnt *clnt) +static int rpc_client_register(struct rpc_clnt *clnt, + rpc_authflavor_t pseudoflavor, + const char *client_name) { struct rpc_auth_create_args auth_args = { - .pseudoflavor = args->authflavor, - .target_name = args->client_name, + .pseudoflavor = pseudoflavor, + .target_name = client_name, }; struct rpc_auth *auth; struct net *net = rpc_net_ns(clnt); @@ -298,7 +319,7 @@ static int rpc_client_register(const struct rpc_create_args *args, auth = rpcauth_create(&auth_args, clnt); if (IS_ERR(auth)) { dprintk("RPC: Couldn't create auth handle (flavor %u)\n", - args->authflavor); + pseudoflavor); err = PTR_ERR(auth); goto err_auth; } @@ -337,7 +358,8 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, { const struct rpc_program *program = args->program; const struct rpc_version *version; - struct rpc_clnt *clnt = NULL; + struct rpc_clnt *clnt = NULL; + const struct rpc_timeout *timeout; int err; /* sanity check the name before trying to print it */ @@ -365,7 +387,6 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, if (err) goto out_no_clid; - rcu_assign_pointer(clnt->cl_xprt, xprt); clnt->cl_procinfo = version->procs; clnt->cl_maxproc = version->nrprocs; clnt->cl_prog = args->prognumber ? : program->number; @@ -380,16 +401,15 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, INIT_LIST_HEAD(&clnt->cl_tasks); spin_lock_init(&clnt->cl_lock); - if (!xprt_bound(xprt)) - clnt->cl_autobind = 1; - - clnt->cl_timeout = xprt->timeout; + timeout = xprt->timeout; if (args->timeout != NULL) { memcpy(&clnt->cl_timeout_default, args->timeout, sizeof(clnt->cl_timeout_default)); - clnt->cl_timeout = &clnt->cl_timeout_default; + timeout = &clnt->cl_timeout_default; } + rpc_clnt_set_transport(clnt, xprt, timeout); + clnt->cl_rtt = &clnt->cl_rtt_default; rpc_init_rtt(&clnt->cl_rtt_default, clnt->cl_timeout->to_initval); @@ -398,7 +418,7 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, /* save the nodename */ rpc_clnt_set_nodename(clnt, utsname()->nodename); - err = rpc_client_register(args, clnt); + err = rpc_client_register(clnt, args->authflavor, args->client_name); if (err) goto out_no_path; if (parent) @@ -418,6 +438,38 @@ out_no_rpciod: return ERR_PTR(err); } +struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args, + struct rpc_xprt *xprt) +{ + struct rpc_clnt *clnt = NULL; + + clnt = rpc_new_client(args, xprt, NULL); + if (IS_ERR(clnt)) + return clnt; + + if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { + int err = rpc_ping(clnt); + if (err != 0) { + rpc_shutdown_client(clnt); + return ERR_PTR(err); + } + } + + clnt->cl_softrtry = 1; + if (args->flags & RPC_CLNT_CREATE_HARDRTRY) + clnt->cl_softrtry = 0; + + if (args->flags & RPC_CLNT_CREATE_AUTOBIND) + clnt->cl_autobind = 1; + if (args->flags & RPC_CLNT_CREATE_DISCRTRY) + clnt->cl_discrtry = 1; + if (!(args->flags & RPC_CLNT_CREATE_QUIET)) + clnt->cl_chatty = 1; + + return clnt; +} +EXPORT_SYMBOL_GPL(rpc_create_xprt); + /** * rpc_create - create an RPC client and transport with one call * @args: rpc_clnt create argument structure @@ -431,7 +483,6 @@ out_no_rpciod: struct rpc_clnt *rpc_create(struct rpc_create_args *args) { struct rpc_xprt *xprt; - struct rpc_clnt *clnt; struct xprt_create xprtargs = { .net = args->net, .ident = args->protocol, @@ -495,30 +546,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args) if (args->flags & RPC_CLNT_CREATE_NONPRIVPORT) xprt->resvport = 0; - clnt = rpc_new_client(args, xprt, NULL); - if (IS_ERR(clnt)) - return clnt; - - if (!(args->flags & RPC_CLNT_CREATE_NOPING)) { - int err = rpc_ping(clnt); - if (err != 0) { - rpc_shutdown_client(clnt); - return ERR_PTR(err); - } - } - - clnt->cl_softrtry = 1; - if (args->flags & RPC_CLNT_CREATE_HARDRTRY) - clnt->cl_softrtry = 0; - - if (args->flags & RPC_CLNT_CREATE_AUTOBIND) - clnt->cl_autobind = 1; - if (args->flags & RPC_CLNT_CREATE_DISCRTRY) - clnt->cl_discrtry = 1; - if (!(args->flags & RPC_CLNT_CREATE_QUIET)) - clnt->cl_chatty = 1; - - return clnt; + return rpc_create_xprt(args, xprt); } EXPORT_SYMBOL_GPL(rpc_create); @@ -600,6 +628,80 @@ rpc_clone_client_set_auth(struct rpc_clnt *clnt, rpc_authflavor_t flavor) } EXPORT_SYMBOL_GPL(rpc_clone_client_set_auth); +/** + * rpc_switch_client_transport: switch the RPC transport on the fly + * @clnt: pointer to a struct rpc_clnt + * @args: pointer to the new transport arguments + * @timeout: pointer to the new timeout parameters + * + * This function allows the caller to switch the RPC transport for the + * rpc_clnt structure 'clnt' to allow it to connect to a mirrored NFS + * server, for instance. It assumes that the caller has ensured that + * there are no active RPC tasks by using some form of locking. + * + * Returns zero if "clnt" is now using the new xprt. Otherwise a + * negative errno is returned, and "clnt" continues to use the old + * xprt. + */ +int rpc_switch_client_transport(struct rpc_clnt *clnt, + struct xprt_create *args, + const struct rpc_timeout *timeout) +{ + const struct rpc_timeout *old_timeo; + rpc_authflavor_t pseudoflavor; + struct rpc_xprt *xprt, *old; + struct rpc_clnt *parent; + int err; + + xprt = xprt_create_transport(args); + if (IS_ERR(xprt)) { + dprintk("RPC: failed to create new xprt for clnt %p\n", + clnt); + return PTR_ERR(xprt); + } + + pseudoflavor = clnt->cl_auth->au_flavor; + + old_timeo = clnt->cl_timeout; + old = rpc_clnt_set_transport(clnt, xprt, timeout); + + rpc_unregister_client(clnt); + __rpc_clnt_remove_pipedir(clnt); + + /* + * A new transport was created. "clnt" therefore + * becomes the root of a new cl_parent tree. clnt's + * children, if it has any, still point to the old xprt. + */ + parent = clnt->cl_parent; + clnt->cl_parent = clnt; + + /* + * The old rpc_auth cache cannot be re-used. GSS + * contexts in particular are between a single + * client and server. + */ + err = rpc_client_register(clnt, pseudoflavor, NULL); + if (err) + goto out_revert; + + synchronize_rcu(); + if (parent != clnt) + rpc_release_client(parent); + xprt_put(old); + dprintk("RPC: replaced xprt for clnt %p\n", clnt); + return 0; + +out_revert: + rpc_clnt_set_transport(clnt, old, old_timeo); + clnt->cl_parent = parent; + rpc_client_register(clnt, pseudoflavor, NULL); + xprt_put(xprt); + dprintk("RPC: failed to switch xprt for clnt %p\n", clnt); + return err; +} +EXPORT_SYMBOL_GPL(rpc_switch_client_transport); + /* * Kill all tasks for the given client. * XXX: kill their descendants as well? @@ -656,14 +758,16 @@ EXPORT_SYMBOL_GPL(rpc_shutdown_client); /* * Free an RPC client */ -static void +static struct rpc_clnt * rpc_free_client(struct rpc_clnt *clnt) { + struct rpc_clnt *parent = NULL; + dprintk_rcu("RPC: destroying %s client for %s\n", clnt->cl_program->name, rcu_dereference(clnt->cl_xprt)->servername); if (clnt->cl_parent != clnt) - rpc_release_client(clnt->cl_parent); + parent = clnt->cl_parent; rpc_clnt_remove_pipedir(clnt); rpc_unregister_client(clnt); rpc_free_iostats(clnt->cl_metrics); @@ -672,18 +776,17 @@ rpc_free_client(struct rpc_clnt *clnt) rpciod_down(); rpc_free_clid(clnt); kfree(clnt); + return parent; } /* * Free an RPC client */ -static void +static struct rpc_clnt * rpc_free_auth(struct rpc_clnt *clnt) { - if (clnt->cl_auth == NULL) { - rpc_free_client(clnt); - return; - } + if (clnt->cl_auth == NULL) + return rpc_free_client(clnt); /* * Note: RPCSEC_GSS may need to send NULL RPC calls in order to @@ -694,7 +797,8 @@ rpc_free_auth(struct rpc_clnt *clnt) rpcauth_release(clnt->cl_auth); clnt->cl_auth = NULL; if (atomic_dec_and_test(&clnt->cl_count)) - rpc_free_client(clnt); + return rpc_free_client(clnt); + return NULL; } /* @@ -705,10 +809,13 @@ rpc_release_client(struct rpc_clnt *clnt) { dprintk("RPC: rpc_release_client(%p)\n", clnt); - if (list_empty(&clnt->cl_tasks)) - wake_up(&destroy_wait); - if (atomic_dec_and_test(&clnt->cl_count)) - rpc_free_auth(clnt); + do { + if (list_empty(&clnt->cl_tasks)) + wake_up(&destroy_wait); + if (!atomic_dec_and_test(&clnt->cl_count)) + break; + clnt = rpc_free_auth(clnt); + } while (clnt != NULL); } EXPORT_SYMBOL_GPL(rpc_release_client); @@ -772,6 +879,8 @@ void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt) atomic_inc(&clnt->cl_count); if (clnt->cl_softrtry) task->tk_flags |= RPC_TASK_SOFT; + if (clnt->cl_noretranstimeo) + task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT; if (sk_memalloc_socks()) { struct rpc_xprt *xprt; @@ -1262,6 +1371,7 @@ rpc_restart_call_prepare(struct rpc_task *task) if (RPC_ASSASSINATED(task)) return 0; task->tk_action = call_start; + task->tk_status = 0; if (task->tk_ops->rpc_call_prepare != NULL) task->tk_action = rpc_prepare_task; return 1; @@ -1278,6 +1388,7 @@ rpc_restart_call(struct rpc_task *task) if (RPC_ASSASSINATED(task)) return 0; task->tk_action = call_start; + task->tk_status = 0; return 1; } EXPORT_SYMBOL_GPL(rpc_restart_call); @@ -1428,9 +1539,13 @@ call_refreshresult(struct rpc_task *task) task->tk_action = call_refresh; switch (status) { case 0: - if (rpcauth_uptodatecred(task)) + if (rpcauth_uptodatecred(task)) { task->tk_action = call_allocate; - return; + return; + } + /* Use rate-limiting and a max number of retries if refresh + * had status 0 but failed to update the cred. + */ case -ETIMEDOUT: rpc_delay(task, 3*HZ); case -EAGAIN: @@ -1623,11 +1738,10 @@ call_bind_status(struct rpc_task *task) case -EPROTONOSUPPORT: dprintk("RPC: %5u remote rpcbind version unavailable, retrying\n", task->tk_pid); - task->tk_status = 0; - task->tk_action = call_bind; - return; + goto retry_timeout; case -ECONNREFUSED: /* connection problems */ case -ECONNRESET: + case -ECONNABORTED: case -ENOTCONN: case -EHOSTDOWN: case -EHOSTUNREACH: @@ -1650,6 +1764,7 @@ call_bind_status(struct rpc_task *task) return; retry_timeout: + task->tk_status = 0; task->tk_action = call_timeout; } @@ -1690,20 +1805,23 @@ call_connect_status(struct rpc_task *task) dprint_status(task); trace_rpc_connect_status(task, status); + task->tk_status = 0; switch (status) { - /* if soft mounted, test if we've timed out */ - case -ETIMEDOUT: - task->tk_action = call_timeout; - return; case -ECONNREFUSED: case -ECONNRESET: + case -ECONNABORTED: case -ENETUNREACH: + case -EHOSTUNREACH: if (RPC_IS_SOFTCONN(task)) break; /* retry with existing socket, after a delay */ - case 0: + rpc_delay(task, 3*HZ); case -EAGAIN: - task->tk_status = 0; + /* Check for timeouts before looping back to call_bind */ + case -ETIMEDOUT: + task->tk_action = call_timeout; + return; + case 0: clnt->cl_stats->netreconn++; task->tk_action = call_transmit; return; @@ -1717,13 +1835,14 @@ call_connect_status(struct rpc_task *task) static void call_transmit(struct rpc_task *task) { + int is_retrans = RPC_WAS_SENT(task); + dprint_status(task); task->tk_action = call_status; if (task->tk_status < 0) return; - task->tk_status = xprt_prepare_transmit(task); - if (task->tk_status != 0) + if (!xprt_prepare_transmit(task)) return; task->tk_action = call_transmit_status; /* Encode here so that rpcsec_gss can use correct sequence number. */ @@ -1742,6 +1861,8 @@ call_transmit(struct rpc_task *task) xprt_transmit(task); if (task->tk_status < 0) return; + if (is_retrans) + task->tk_client->cl_stats->rpcretrans++; /* * On success, ensure that we call xprt_end_transmit() before sleeping * in order to allow access to the socket to other RPC requests. @@ -1795,6 +1916,7 @@ call_transmit_status(struct rpc_task *task) break; } case -ECONNRESET: + case -ECONNABORTED: case -ENOTCONN: case -EPIPE: rpc_task_force_reencode(task); @@ -1811,8 +1933,7 @@ call_bc_transmit(struct rpc_task *task) { struct rpc_rqst *req = task->tk_rqstp; - task->tk_status = xprt_prepare_transmit(task); - if (task->tk_status == -EAGAIN) { + if (!xprt_prepare_transmit(task)) { /* * Could not reserve the transport. Try again after the * transport is released. @@ -1893,6 +2014,10 @@ call_status(struct rpc_task *task) case -EHOSTDOWN: case -EHOSTUNREACH: case -ENETUNREACH: + if (RPC_IS_SOFTCONN(task)) { + rpc_exit(task, status); + break; + } /* * Delay any retries for 3 seconds, then handle as if it * were a timeout. @@ -1900,12 +2025,14 @@ call_status(struct rpc_task *task) rpc_delay(task, 3*HZ); case -ETIMEDOUT: task->tk_action = call_timeout; - if (task->tk_client->cl_discrtry) + if (!(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) + && task->tk_client->cl_discrtry) xprt_conditional_disconnect(req->rq_xprt, req->rq_connect_cookie); break; - case -ECONNRESET: case -ECONNREFUSED: + case -ECONNRESET: + case -ECONNABORTED: rpc_force_rebind(clnt); rpc_delay(task, 3*HZ); case -EPIPE: @@ -1982,7 +2109,6 @@ call_timeout(struct rpc_task *task) rpcauth_invalcred(task); retry: - clnt->cl_stats->rpcretrans++; task->tk_action = call_bind; task->tk_status = 0; } @@ -2025,7 +2151,6 @@ call_decode(struct rpc_task *task) if (req->rq_rcv_buf.len < 12) { if (!RPC_IS_SOFT(task)) { task->tk_action = call_bind; - clnt->cl_stats->rpcretrans++; goto out_retry; } dprintk("RPC: %s: too small RPC reply size (%d bytes)\n", diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h index 779742cfc1f..df582687653 100644 --- a/net/sunrpc/netns.h +++ b/net/sunrpc/netns.h @@ -14,6 +14,7 @@ struct sunrpc_net { struct cache_detail *rsi_cache; struct super_block *pipefs_sb; + struct rpc_pipe *gssd_dummy; struct mutex pipefs_sb_lock; struct list_head all_clients; @@ -26,14 +27,11 @@ struct sunrpc_net { unsigned int rpcb_is_af_local : 1; struct mutex gssp_lock; - wait_queue_head_t gssp_wq; struct rpc_clnt *gssp_clnt; int use_gss_proxy; int pipe_version; atomic_t pipe_users; struct proc_dir_entry *use_gssp_proc; - - unsigned int gssd_running; }; extern int sunrpc_net_id; diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index f94567b45bb..b1855489856 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -17,6 +17,7 @@ #include <linux/fsnotify.h> #include <linux/kernel.h> #include <linux/rcupdate.h> +#include <linux/utsname.h> #include <asm/ioctls.h> #include <linux/poll.h> @@ -38,7 +39,7 @@ #define NET_NAME(net) ((net == &init_net) ? " (init_net)" : "") static struct file_system_type rpc_pipe_fs_type; - +static const struct rpc_pipe_ops gssd_dummy_pipe_ops; static struct kmem_cache *rpc_inode_cachep __read_mostly; @@ -216,14 +217,11 @@ rpc_destroy_inode(struct inode *inode) static int rpc_pipe_open(struct inode *inode, struct file *filp) { - struct net *net = inode->i_sb->s_fs_info; - struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); struct rpc_pipe *pipe; int first_open; int res = -ENXIO; mutex_lock(&inode->i_mutex); - sn->gssd_running = 1; pipe = RPC_I(inode)->pipe; if (pipe == NULL) goto out; @@ -471,15 +469,6 @@ struct rpc_filelist { umode_t mode; }; -static int rpc_delete_dentry(const struct dentry *dentry) -{ - return 1; -} - -static const struct dentry_operations rpc_dentry_operations = { - .d_delete = rpc_delete_dentry, -}; - static struct inode * rpc_get_inode(struct super_block *sb, umode_t mode) { @@ -519,8 +508,8 @@ static int __rpc_create_common(struct inode *dir, struct dentry *dentry, d_add(dentry, inode); return 0; out_err: - printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n", - __FILE__, __func__, dentry->d_name.name); + printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %pd\n", + __FILE__, __func__, dentry); dput(dentry); return -ENOMEM; } @@ -755,8 +744,8 @@ static int rpc_populate(struct dentry *parent, out_bad: __rpc_depopulate(parent, files, start, eof); mutex_unlock(&dir->i_mutex); - printk(KERN_WARNING "%s: %s failed to populate directory %s\n", - __FILE__, __func__, parent->d_name.name); + printk(KERN_WARNING "%s: %s failed to populate directory %pd\n", + __FILE__, __func__, parent); return err; } @@ -852,8 +841,8 @@ out: return dentry; out_err: dentry = ERR_PTR(err); - printk(KERN_WARNING "%s: %s() failed to create pipe %s/%s (errno = %d)\n", - __FILE__, __func__, parent->d_name.name, name, + printk(KERN_WARNING "%s: %s() failed to create pipe %pd/%s (errno = %d)\n", + __FILE__, __func__, parent, name, err); goto out; } @@ -1168,6 +1157,7 @@ enum { RPCAUTH_nfsd4_cb, RPCAUTH_cache, RPCAUTH_nfsd, + RPCAUTH_gssd, RPCAUTH_RootEOF }; @@ -1204,6 +1194,10 @@ static const struct rpc_filelist files[] = { .name = "nfsd", .mode = S_IFDIR | S_IRUGO | S_IXUGO, }, + [RPCAUTH_gssd] = { + .name = "gssd", + .mode = S_IFDIR | S_IRUGO | S_IXUGO, + }, }; /* @@ -1217,13 +1211,24 @@ struct dentry *rpc_d_lookup_sb(const struct super_block *sb, } EXPORT_SYMBOL_GPL(rpc_d_lookup_sb); -void rpc_pipefs_init_net(struct net *net) +int rpc_pipefs_init_net(struct net *net) { struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); + sn->gssd_dummy = rpc_mkpipe_data(&gssd_dummy_pipe_ops, 0); + if (IS_ERR(sn->gssd_dummy)) + return PTR_ERR(sn->gssd_dummy); + mutex_init(&sn->pipefs_sb_lock); - sn->gssd_running = 1; sn->pipe_version = -1; + return 0; +} + +void rpc_pipefs_exit_net(struct net *net) +{ + struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); + + rpc_destroy_pipe_data(sn->gssd_dummy); } /* @@ -1253,11 +1258,134 @@ void rpc_put_sb_net(const struct net *net) } EXPORT_SYMBOL_GPL(rpc_put_sb_net); +static const struct rpc_filelist gssd_dummy_clnt_dir[] = { + [0] = { + .name = "clntXX", + .mode = S_IFDIR | S_IRUGO | S_IXUGO, + }, +}; + +static ssize_t +dummy_downcall(struct file *filp, const char __user *src, size_t len) +{ + return -EINVAL; +} + +static const struct rpc_pipe_ops gssd_dummy_pipe_ops = { + .upcall = rpc_pipe_generic_upcall, + .downcall = dummy_downcall, +}; + +/* + * Here we present a bogus "info" file to keep rpc.gssd happy. We don't expect + * that it will ever use this info to handle an upcall, but rpc.gssd expects + * that this file will be there and have a certain format. + */ +static int +rpc_show_dummy_info(struct seq_file *m, void *v) +{ + seq_printf(m, "RPC server: %s\n", utsname()->nodename); + seq_printf(m, "service: foo (1) version 0\n"); + seq_printf(m, "address: 127.0.0.1\n"); + seq_printf(m, "protocol: tcp\n"); + seq_printf(m, "port: 0\n"); + return 0; +} + +static int +rpc_dummy_info_open(struct inode *inode, struct file *file) +{ + return single_open(file, rpc_show_dummy_info, NULL); +} + +static const struct file_operations rpc_dummy_info_operations = { + .owner = THIS_MODULE, + .open = rpc_dummy_info_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static const struct rpc_filelist gssd_dummy_info_file[] = { + [0] = { + .name = "info", + .i_fop = &rpc_dummy_info_operations, + .mode = S_IFREG | S_IRUSR, + }, +}; + +/** + * rpc_gssd_dummy_populate - create a dummy gssd pipe + * @root: root of the rpc_pipefs filesystem + * @pipe_data: pipe data created when netns is initialized + * + * Create a dummy set of directories and a pipe that gssd can hold open to + * indicate that it is up and running. + */ +static struct dentry * +rpc_gssd_dummy_populate(struct dentry *root, struct rpc_pipe *pipe_data) +{ + int ret = 0; + struct dentry *gssd_dentry; + struct dentry *clnt_dentry = NULL; + struct dentry *pipe_dentry = NULL; + struct qstr q = QSTR_INIT(files[RPCAUTH_gssd].name, + strlen(files[RPCAUTH_gssd].name)); + + /* We should never get this far if "gssd" doesn't exist */ + gssd_dentry = d_hash_and_lookup(root, &q); + if (!gssd_dentry) + return ERR_PTR(-ENOENT); + + ret = rpc_populate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1, NULL); + if (ret) { + pipe_dentry = ERR_PTR(ret); + goto out; + } + + q.name = gssd_dummy_clnt_dir[0].name; + q.len = strlen(gssd_dummy_clnt_dir[0].name); + clnt_dentry = d_hash_and_lookup(gssd_dentry, &q); + if (!clnt_dentry) { + pipe_dentry = ERR_PTR(-ENOENT); + goto out; + } + + ret = rpc_populate(clnt_dentry, gssd_dummy_info_file, 0, 1, NULL); + if (ret) { + __rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1); + pipe_dentry = ERR_PTR(ret); + goto out; + } + + pipe_dentry = rpc_mkpipe_dentry(clnt_dentry, "gssd", NULL, pipe_data); + if (IS_ERR(pipe_dentry)) { + __rpc_depopulate(clnt_dentry, gssd_dummy_info_file, 0, 1); + __rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1); + } +out: + dput(clnt_dentry); + dput(gssd_dentry); + return pipe_dentry; +} + +static void +rpc_gssd_dummy_depopulate(struct dentry *pipe_dentry) +{ + struct dentry *clnt_dir = pipe_dentry->d_parent; + struct dentry *gssd_dir = clnt_dir->d_parent; + + __rpc_rmpipe(clnt_dir->d_inode, pipe_dentry); + __rpc_depopulate(clnt_dir, gssd_dummy_info_file, 0, 1); + __rpc_depopulate(gssd_dir, gssd_dummy_clnt_dir, 0, 1); + dput(pipe_dentry); +} + static int rpc_fill_super(struct super_block *sb, void *data, int silent) { struct inode *inode; - struct dentry *root; + struct dentry *root, *gssd_dentry; struct net *net = data; struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); int err; @@ -1266,7 +1394,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent) sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = RPCAUTH_GSSMAGIC; sb->s_op = &s_ops; - sb->s_d_op = &rpc_dentry_operations; + sb->s_d_op = &simple_dentry_operations; sb->s_time_gran = 1; inode = rpc_get_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO); @@ -1275,6 +1403,13 @@ rpc_fill_super(struct super_block *sb, void *data, int silent) return -ENOMEM; if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL)) return -ENOMEM; + + gssd_dentry = rpc_gssd_dummy_populate(root, sn->gssd_dummy); + if (IS_ERR(gssd_dentry)) { + __rpc_depopulate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF); + return PTR_ERR(gssd_dentry); + } + dprintk("RPC: sending pipefs MOUNT notification for net %p%s\n", net, NET_NAME(net)); mutex_lock(&sn->pipefs_sb_lock); @@ -1289,6 +1424,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent) return 0; err_depopulate: + rpc_gssd_dummy_depopulate(gssd_dentry); blocking_notifier_call_chain(&rpc_pipefs_notifier_list, RPC_PIPEFS_UMOUNT, sb); @@ -1298,6 +1434,16 @@ err_depopulate: return err; } +bool +gssd_running(struct net *net) +{ + struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); + struct rpc_pipe *pipe = sn->gssd_dummy; + + return pipe->nreaders || pipe->nwriters; +} +EXPORT_SYMBOL_GPL(gssd_running); + static struct dentry * rpc_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index ff3cc4bf4b2..c0365c14b85 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -637,7 +637,8 @@ static void __rpc_queue_timer_fn(unsigned long ptr) static void __rpc_atrun(struct rpc_task *task) { - task->tk_status = 0; + if (task->tk_status == -ETIMEDOUT) + task->tk_status = 0; } /* @@ -831,7 +832,8 @@ static void rpc_async_schedule(struct work_struct *work) * @size: requested byte size * * To prevent rpciod from hanging, this allocator never sleeps, - * returning NULL if the request cannot be serviced immediately. + * returning NULL and suppressing warning if the request cannot be serviced + * immediately. * The caller can arrange to sleep in a way that is safe for rpciod. * * Most requests are 'small' (under 2KiB) and can be serviced from a @@ -844,7 +846,7 @@ static void rpc_async_schedule(struct work_struct *work) void *rpc_malloc(struct rpc_task *task, size_t size) { struct rpc_buffer *buf; - gfp_t gfp = GFP_NOWAIT; + gfp_t gfp = GFP_NOWAIT | __GFP_NOWARN; if (RPC_IS_SWAPPER(task)) gfp |= __GFP_MEMALLOC; diff --git a/net/sunrpc/socklib.c b/net/sunrpc/socklib.c index 0a648c502fc..2df87f78e51 100644 --- a/net/sunrpc/socklib.c +++ b/net/sunrpc/socklib.c @@ -173,7 +173,8 @@ int csum_partial_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb) return -1; if (csum_fold(desc.csum)) return -1; - if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE)) + if (unlikely(skb->ip_summed == CHECKSUM_COMPLETE) && + !skb->csum_complete_sw) netdev_rx_csum_fault(skb->dev); return 0; no_checksum: diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h index 14c9f6d1c5f..f2b7cb540e6 100644 --- a/net/sunrpc/sunrpc.h +++ b/net/sunrpc/sunrpc.h @@ -43,6 +43,19 @@ static inline int rpc_reply_expected(struct rpc_task *task) (task->tk_msg.rpc_proc->p_decode != NULL); } +static inline int sock_is_loopback(struct sock *sk) +{ + struct dst_entry *dst; + int loopback = 0; + rcu_read_lock(); + dst = rcu_dereference(sk->sk_dst_cache); + if (dst && dst->dev && + (dst->dev->features & NETIF_F_LOOPBACK)) + loopback = 1; + rcu_read_unlock(); + return loopback; +} + int svc_send_common(struct socket *sock, struct xdr_buf *xdr, struct page *headpage, unsigned long headoffset, struct page *tailpage, unsigned long tailoffset); diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c index 3d6498af9ad..cd30120de9e 100644 --- a/net/sunrpc/sunrpc_syms.c +++ b/net/sunrpc/sunrpc_syms.c @@ -44,12 +44,17 @@ static __net_init int sunrpc_init_net(struct net *net) if (err) goto err_unixgid; - rpc_pipefs_init_net(net); + err = rpc_pipefs_init_net(net); + if (err) + goto err_pipefs; + INIT_LIST_HEAD(&sn->all_clients); spin_lock_init(&sn->rpc_client_lock); spin_lock_init(&sn->rpcb_clnt_lock); return 0; +err_pipefs: + unix_gid_cache_destroy(net); err_unixgid: ip_map_cache_destroy(net); err_ipmap: @@ -60,6 +65,7 @@ err_proc: static __net_exit void sunrpc_exit_net(struct net *net) { + rpc_pipefs_exit_net(net); unix_gid_cache_destroy(net); ip_map_cache_destroy(net); rpc_proc_exit(net); diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index b974571126f..5de6801cd92 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -916,9 +916,6 @@ static int __svc_register(struct net *net, const char *progname, #endif } - if (error < 0) - printk(KERN_WARNING "svc: failed to register %sv%u RPC " - "service (errno %d).\n", progname, version, -error); return error; } @@ -937,6 +934,7 @@ int svc_register(const struct svc_serv *serv, struct net *net, const unsigned short port) { struct svc_program *progp; + struct svc_version *vers; unsigned int i; int error = 0; @@ -946,7 +944,8 @@ int svc_register(const struct svc_serv *serv, struct net *net, for (progp = serv->sv_program; progp; progp = progp->pg_next) { for (i = 0; i < progp->pg_nvers; i++) { - if (progp->pg_vers[i] == NULL) + vers = progp->pg_vers[i]; + if (vers == NULL) continue; dprintk("svc: svc_register(%sv%d, %s, %u, %u)%s\n", @@ -955,16 +954,26 @@ int svc_register(const struct svc_serv *serv, struct net *net, proto == IPPROTO_UDP? "udp" : "tcp", port, family, - progp->pg_vers[i]->vs_hidden? - " (but not telling portmap)" : ""); + vers->vs_hidden ? + " (but not telling portmap)" : ""); - if (progp->pg_vers[i]->vs_hidden) + if (vers->vs_hidden) continue; error = __svc_register(net, progp->pg_name, progp->pg_prog, i, family, proto, port); - if (error < 0) + + if (vers->vs_rpcb_optnl) { + error = 0; + continue; + } + + if (error < 0) { + printk(KERN_WARNING "svc: failed to register " + "%sv%u RPC service (errno %d).\n", + progp->pg_name, i, -error); break; + } } } @@ -1104,8 +1113,6 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv) rqstp->rq_vers = vers = svc_getnl(argv); /* version number */ rqstp->rq_proc = proc = svc_getnl(argv); /* procedure number */ - progp = serv->sv_program; - for (progp = serv->sv_program; progp; progp = progp->pg_next) if (prog == progp->pg_prog) break; diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 80a6640f329..b4737fbdec1 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -571,7 +571,7 @@ static void svc_check_conn_limits(struct svc_serv *serv) } } -int svc_alloc_arg(struct svc_rqst *rqstp) +static int svc_alloc_arg(struct svc_rqst *rqstp) { struct svc_serv *serv = rqstp->rq_server; struct xdr_buf *arg; @@ -597,6 +597,7 @@ int svc_alloc_arg(struct svc_rqst *rqstp) } rqstp->rq_pages[i] = p; } + rqstp->rq_page_end = &rqstp->rq_pages[i]; rqstp->rq_pages[i++] = NULL; /* this might be seen in nfs_read_actor */ /* Make arg->head point to first page and arg->pages point to rest */ @@ -612,7 +613,7 @@ int svc_alloc_arg(struct svc_rqst *rqstp) return 0; } -struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout) +static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout) { struct svc_xprt *xprt; struct svc_pool *pool = rqstp->rq_pool; @@ -691,7 +692,7 @@ struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout) return xprt; } -void svc_add_new_temp_xprt(struct svc_serv *serv, struct svc_xprt *newxpt) +static void svc_add_new_temp_xprt(struct svc_serv *serv, struct svc_xprt *newxpt) { spin_lock_bh(&serv->sv_lock); set_bit(XPT_TEMP, &newxpt->xpt_flags); @@ -730,6 +731,8 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt) newxpt = xprt->xpt_ops->xpo_accept(xprt); if (newxpt) svc_add_new_temp_xprt(serv, newxpt); + else + module_put(xprt->xpt_class->xcl_owner); } else if (xprt->xpt_ops->xpo_has_wspace(xprt)) { /* XPT_DATA|XPT_DEFERRED case: */ dprintk("svc: server %p, pool %u, transport %p, inuse=%d\n", @@ -793,7 +796,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout) clear_bit(XPT_OLD, &xprt->xpt_flags); - rqstp->rq_secure = svc_port_is_privileged(svc_addr(rqstp)); + rqstp->rq_secure = xprt->xpt_ops->xpo_secure_port(rqstp); rqstp->rq_chandle.defer = svc_defer; if (serv->sv_stats) diff --git a/net/sunrpc/svcauth.c b/net/sunrpc/svcauth.c index 2af7b0cba43..79c0f3459b5 100644 --- a/net/sunrpc/svcauth.c +++ b/net/sunrpc/svcauth.c @@ -54,6 +54,8 @@ svc_authenticate(struct svc_rqst *rqstp, __be32 *authp) } spin_unlock(&authtab_lock); + rqstp->rq_auth_slack = 0; + rqstp->rq_authop = aops; return aops->accept(rqstp, authp); } diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 9c9caaa5e0d..b507cd327d9 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -60,7 +60,7 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *, struct socket *, int flags); -static void svc_udp_data_ready(struct sock *, int); +static void svc_udp_data_ready(struct sock *); static int svc_udp_recvfrom(struct svc_rqst *); static int svc_udp_sendto(struct svc_rqst *); static void svc_sock_detach(struct svc_xprt *); @@ -291,12 +291,14 @@ static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining) &inet_sk(sk)->inet_rcv_saddr, inet_sk(sk)->inet_num); break; +#if IS_ENABLED(CONFIG_IPV6) case PF_INET6: len = snprintf(buf, remaining, "ipv6 %s %pI6 %d\n", proto_name, - &inet6_sk(sk)->rcv_saddr, + &sk->sk_v6_rcv_saddr, inet_sk(sk)->inet_num); break; +#endif default: len = snprintf(buf, remaining, "*unknown-%d*\n", sk->sk_family); @@ -398,17 +400,23 @@ static void svc_sock_setbufsize(struct socket *sock, unsigned int snd, release_sock(sock->sk); #endif } + +static int svc_sock_secure_port(struct svc_rqst *rqstp) +{ + return svc_port_is_privileged(svc_addr(rqstp)); +} + /* * INET callback when data has been received on the socket. */ -static void svc_udp_data_ready(struct sock *sk, int count) +static void svc_udp_data_ready(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; wait_queue_head_t *wq = sk_sleep(sk); if (svsk) { - dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n", - svsk, sk, count, + dprintk("svc: socket %p(inet %p), busy=%d\n", + svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); svc_xprt_enqueue(&svsk->sk_xprt); @@ -676,6 +684,7 @@ static struct svc_xprt_ops svc_udp_ops = { .xpo_prep_reply_hdr = svc_udp_prep_reply_hdr, .xpo_has_wspace = svc_udp_has_wspace, .xpo_accept = svc_udp_accept, + .xpo_secure_port = svc_sock_secure_port, }; static struct svc_xprt_class svc_udp_class = { @@ -729,7 +738,7 @@ static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv) * A data_ready event on a listening socket means there's a connection * pending. Do not use state_change as a substitute for it. */ -static void svc_tcp_listen_data_ready(struct sock *sk, int count_unused) +static void svc_tcp_listen_data_ready(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; wait_queue_head_t *wq; @@ -781,7 +790,7 @@ static void svc_tcp_state_change(struct sock *sk) wake_up_interruptible_all(wq); } -static void svc_tcp_data_ready(struct sock *sk, int count) +static void svc_tcp_data_ready(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; wait_queue_head_t *wq = sk_sleep(sk); @@ -840,8 +849,7 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) * tell us anything. For now just warn about unpriv connections. */ if (!svc_port_is_privileged(sin)) { - dprintk(KERN_WARNING - "%s: connect from unprivileged port: %s\n", + dprintk("%s: connect from unprivileged port: %s\n", serv->sv_name, __svc_print_addr(sin, buf, sizeof(buf))); } @@ -865,6 +873,10 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) } svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen); + if (sock_is_loopback(newsock->sk)) + set_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags); + else + clear_bit(XPT_LOCAL, &newsvsk->sk_xprt.xpt_flags); if (serv->sv_stats) serv->sv_stats->nettcpconn++; @@ -1110,6 +1122,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) rqstp->rq_xprt_ctxt = NULL; rqstp->rq_prot = IPPROTO_TCP; + rqstp->rq_local = !!test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags); p = (__be32 *)rqstp->rq_arg.head[0].iov_base; calldir = p[1]; @@ -1232,6 +1245,7 @@ static struct svc_xprt_ops svc_tcp_bc_ops = { .xpo_detach = svc_bc_tcp_sock_detach, .xpo_free = svc_bc_sock_free, .xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr, + .xpo_secure_port = svc_sock_secure_port, }; static struct svc_xprt_class svc_tcp_bc_class = { @@ -1270,6 +1284,7 @@ static struct svc_xprt_ops svc_tcp_ops = { .xpo_prep_reply_hdr = svc_tcp_prep_reply_hdr, .xpo_has_wspace = svc_tcp_has_wspace, .xpo_accept = svc_tcp_accept, + .xpo_secure_port = svc_sock_secure_port, }; static struct svc_xprt_class svc_tcp_class = { @@ -1395,6 +1410,22 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv, return svsk; } +bool svc_alien_sock(struct net *net, int fd) +{ + int err; + struct socket *sock = sockfd_lookup(fd, &err); + bool ret = false; + + if (!sock) + goto out; + if (sock_net(sock->sk) != net) + ret = true; + sockfd_put(sock); +out: + return ret; +} +EXPORT_SYMBOL_GPL(svc_alien_sock); + /** * svc_addsock - add a listener socket to an RPC service * @serv: pointer to RPC service to which to add a new listener diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 1504bb11e4f..23fb4e75e24 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -462,6 +462,7 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) struct kvec *iov = buf->head; int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len; + xdr_set_scratch_buffer(xdr, NULL, 0); BUG_ON(scratch_len < 0); xdr->buf = buf; xdr->iov = iov; @@ -482,6 +483,73 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) EXPORT_SYMBOL_GPL(xdr_init_encode); /** + * xdr_commit_encode - Ensure all data is written to buffer + * @xdr: pointer to xdr_stream + * + * We handle encoding across page boundaries by giving the caller a + * temporary location to write to, then later copying the data into + * place; xdr_commit_encode does that copying. + * + * Normally the caller doesn't need to call this directly, as the + * following xdr_reserve_space will do it. But an explicit call may be + * required at the end of encoding, or any other time when the xdr_buf + * data might be read. + */ +void xdr_commit_encode(struct xdr_stream *xdr) +{ + int shift = xdr->scratch.iov_len; + void *page; + + if (shift == 0) + return; + page = page_address(*xdr->page_ptr); + memcpy(xdr->scratch.iov_base, page, shift); + memmove(page, page + shift, (void *)xdr->p - page); + xdr->scratch.iov_len = 0; +} +EXPORT_SYMBOL_GPL(xdr_commit_encode); + +__be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr, size_t nbytes) +{ + static __be32 *p; + int space_left; + int frag1bytes, frag2bytes; + + if (nbytes > PAGE_SIZE) + return NULL; /* Bigger buffers require special handling */ + if (xdr->buf->len + nbytes > xdr->buf->buflen) + return NULL; /* Sorry, we're totally out of space */ + frag1bytes = (xdr->end - xdr->p) << 2; + frag2bytes = nbytes - frag1bytes; + if (xdr->iov) + xdr->iov->iov_len += frag1bytes; + else + xdr->buf->page_len += frag1bytes; + xdr->page_ptr++; + xdr->iov = NULL; + /* + * If the last encode didn't end exactly on a page boundary, the + * next one will straddle boundaries. Encode into the next + * page, then copy it back later in xdr_commit_encode. We use + * the "scratch" iov to track any temporarily unused fragment of + * space at the end of the previous buffer: + */ + xdr->scratch.iov_base = xdr->p; + xdr->scratch.iov_len = frag1bytes; + p = page_address(*xdr->page_ptr); + /* + * Note this is where the next encode will start after we've + * shifted this one back: + */ + xdr->p = (void *)p + frag2bytes; + space_left = xdr->buf->buflen - xdr->buf->len; + xdr->end = (void *)p + min_t(int, space_left, PAGE_SIZE); + xdr->buf->page_len += frag2bytes; + xdr->buf->len += nbytes; + return p; +} + +/** * xdr_reserve_space - Reserve buffer space for sending * @xdr: pointer to xdr_stream * @nbytes: number of bytes to reserve @@ -495,20 +563,122 @@ __be32 * xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes) __be32 *p = xdr->p; __be32 *q; + xdr_commit_encode(xdr); /* align nbytes on the next 32-bit boundary */ nbytes += 3; nbytes &= ~3; q = p + (nbytes >> 2); if (unlikely(q > xdr->end || q < p)) - return NULL; + return xdr_get_next_encode_buffer(xdr, nbytes); xdr->p = q; - xdr->iov->iov_len += nbytes; + if (xdr->iov) + xdr->iov->iov_len += nbytes; + else + xdr->buf->page_len += nbytes; xdr->buf->len += nbytes; return p; } EXPORT_SYMBOL_GPL(xdr_reserve_space); /** + * xdr_truncate_encode - truncate an encode buffer + * @xdr: pointer to xdr_stream + * @len: new length of buffer + * + * Truncates the xdr stream, so that xdr->buf->len == len, + * and xdr->p points at offset len from the start of the buffer, and + * head, tail, and page lengths are adjusted to correspond. + * + * If this means moving xdr->p to a different buffer, we assume that + * that the end pointer should be set to the end of the current page, + * except in the case of the head buffer when we assume the head + * buffer's current length represents the end of the available buffer. + * + * This is *not* safe to use on a buffer that already has inlined page + * cache pages (as in a zero-copy server read reply), except for the + * simple case of truncating from one position in the tail to another. + * + */ +void xdr_truncate_encode(struct xdr_stream *xdr, size_t len) +{ + struct xdr_buf *buf = xdr->buf; + struct kvec *head = buf->head; + struct kvec *tail = buf->tail; + int fraglen; + int new, old; + + if (len > buf->len) { + WARN_ON_ONCE(1); + return; + } + xdr_commit_encode(xdr); + + fraglen = min_t(int, buf->len - len, tail->iov_len); + tail->iov_len -= fraglen; + buf->len -= fraglen; + if (tail->iov_len && buf->len == len) { + xdr->p = tail->iov_base + tail->iov_len; + /* xdr->end, xdr->iov should be set already */ + return; + } + WARN_ON_ONCE(fraglen); + fraglen = min_t(int, buf->len - len, buf->page_len); + buf->page_len -= fraglen; + buf->len -= fraglen; + + new = buf->page_base + buf->page_len; + old = new + fraglen; + xdr->page_ptr -= (old >> PAGE_SHIFT) - (new >> PAGE_SHIFT); + + if (buf->page_len && buf->len == len) { + xdr->p = page_address(*xdr->page_ptr); + xdr->end = (void *)xdr->p + PAGE_SIZE; + xdr->p = (void *)xdr->p + (new % PAGE_SIZE); + /* xdr->iov should already be NULL */ + return; + } + if (fraglen) { + xdr->end = head->iov_base + head->iov_len; + xdr->page_ptr--; + } + /* (otherwise assume xdr->end is already set) */ + head->iov_len = len; + buf->len = len; + xdr->p = head->iov_base + head->iov_len; + xdr->iov = buf->head; +} +EXPORT_SYMBOL(xdr_truncate_encode); + +/** + * xdr_restrict_buflen - decrease available buffer space + * @xdr: pointer to xdr_stream + * @newbuflen: new maximum number of bytes available + * + * Adjust our idea of how much space is available in the buffer. + * If we've already used too much space in the buffer, returns -1. + * If the available space is already smaller than newbuflen, returns 0 + * and does nothing. Otherwise, adjusts xdr->buf->buflen to newbuflen + * and ensures xdr->end is set at most offset newbuflen from the start + * of the buffer. + */ +int xdr_restrict_buflen(struct xdr_stream *xdr, int newbuflen) +{ + struct xdr_buf *buf = xdr->buf; + int left_in_this_buf = (void *)xdr->end - (void *)xdr->p; + int end_offset = buf->len + left_in_this_buf; + + if (newbuflen < 0 || newbuflen < buf->len) + return -1; + if (newbuflen > buf->buflen) + return 0; + if (newbuflen < end_offset) + xdr->end = (void *)xdr->end + newbuflen - end_offset; + buf->buflen = newbuflen; + return 0; +} +EXPORT_SYMBOL(xdr_restrict_buflen); + +/** * xdr_write_pages - Insert a list of pages into an XDR buffer for sending * @xdr: pointer to xdr_stream * @pages: list of pages @@ -833,8 +1003,20 @@ xdr_buf_from_iov(struct kvec *iov, struct xdr_buf *buf) } EXPORT_SYMBOL_GPL(xdr_buf_from_iov); -/* Sets subbuf to the portion of buf of length len beginning base bytes - * from the start of buf. Returns -1 if base of length are out of bounds. */ +/** + * xdr_buf_subsegment - set subbuf to a portion of buf + * @buf: an xdr buffer + * @subbuf: the result buffer + * @base: beginning of range in bytes + * @len: length of range in bytes + * + * sets @subbuf to an xdr buffer representing the portion of @buf of + * length @len starting at offset @base. + * + * @buf and @subbuf may be pointers to the same struct xdr_buf. + * + * Returns -1 if base of length are out of bounds. + */ int xdr_buf_subsegment(struct xdr_buf *buf, struct xdr_buf *subbuf, unsigned int base, unsigned int len) @@ -847,9 +1029,8 @@ xdr_buf_subsegment(struct xdr_buf *buf, struct xdr_buf *subbuf, len -= subbuf->head[0].iov_len; base = 0; } else { - subbuf->head[0].iov_base = NULL; - subbuf->head[0].iov_len = 0; base -= buf->head[0].iov_len; + subbuf->head[0].iov_len = 0; } if (base < buf->page_len) { @@ -871,9 +1052,8 @@ xdr_buf_subsegment(struct xdr_buf *buf, struct xdr_buf *subbuf, len -= subbuf->tail[0].iov_len; base = 0; } else { - subbuf->tail[0].iov_base = NULL; - subbuf->tail[0].iov_len = 0; base -= buf->tail[0].iov_len; + subbuf->tail[0].iov_len = 0; } if (base || len) diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 095363eee76..c3b2b3369e5 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -71,24 +71,6 @@ static void xprt_destroy(struct rpc_xprt *xprt); static DEFINE_SPINLOCK(xprt_list_lock); static LIST_HEAD(xprt_list); -/* - * The transport code maintains an estimate on the maximum number of out- - * standing RPC requests, using a smoothed version of the congestion - * avoidance implemented in 44BSD. This is basically the Van Jacobson - * congestion algorithm: If a retransmit occurs, the congestion window is - * halved; otherwise, it is incremented by 1/cwnd when - * - * - a reply is received and - * - a full number of requests are outstanding and - * - the congestion window hasn't been updated recently. - */ -#define RPC_CWNDSHIFT (8U) -#define RPC_CWNDSCALE (1U << RPC_CWNDSHIFT) -#define RPC_INITCWND RPC_CWNDSCALE -#define RPC_MAXCWND(xprt) ((xprt)->max_reqs << RPC_CWNDSHIFT) - -#define RPCXPRT_CONGESTED(xprt) ((xprt)->cong >= (xprt)->cwnd) - /** * xprt_register_transport - register a transport implementation * @transport: transport to register @@ -205,10 +187,8 @@ int xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task) goto out_sleep; } xprt->snd_task = task; - if (req != NULL) { - req->rq_bytes_sent = 0; + if (req != NULL) req->rq_ntrans++; - } return 1; @@ -232,9 +212,9 @@ static void xprt_clear_locked(struct rpc_xprt *xprt) { xprt->snd_task = NULL; if (!test_bit(XPRT_CLOSE_WAIT, &xprt->state)) { - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(XPRT_LOCKED, &xprt->state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); } else queue_work(rpciod_workqueue, &xprt->task_cleanup); } @@ -263,7 +243,6 @@ int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task) } if (__xprt_get_cong(xprt, task)) { xprt->snd_task = task; - req->rq_bytes_sent = 0; req->rq_ntrans++; return 1; } @@ -300,10 +279,8 @@ static bool __xprt_lock_write_func(struct rpc_task *task, void *data) req = task->tk_rqstp; xprt->snd_task = task; - if (req) { - req->rq_bytes_sent = 0; + if (req) req->rq_ntrans++; - } return true; } @@ -329,7 +306,6 @@ static bool __xprt_lock_write_cong_func(struct rpc_task *task, void *data) } if (__xprt_get_cong(xprt, task)) { xprt->snd_task = task; - req->rq_bytes_sent = 0; req->rq_ntrans++; return true; } @@ -358,6 +334,11 @@ out_unlock: void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task) { if (xprt->snd_task == task) { + if (task != NULL) { + struct rpc_rqst *req = task->tk_rqstp; + if (req != NULL) + req->rq_bytes_sent = 0; + } xprt_clear_locked(xprt); __xprt_lock_write_next(xprt); } @@ -375,6 +356,11 @@ EXPORT_SYMBOL_GPL(xprt_release_xprt); void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task) { if (xprt->snd_task == task) { + if (task != NULL) { + struct rpc_rqst *req = task->tk_rqstp; + if (req != NULL) + req->rq_bytes_sent = 0; + } xprt_clear_locked(xprt); __xprt_lock_write_next_cong(xprt); } @@ -442,7 +428,15 @@ EXPORT_SYMBOL_GPL(xprt_release_rqst_cong); * @task: recently completed RPC request used to adjust window * @result: result code of completed RPC request * - * We use a time-smoothed congestion estimator to avoid heavy oscillation. + * The transport code maintains an estimate on the maximum number of out- + * standing RPC requests, using a smoothed version of the congestion + * avoidance implemented in 44BSD. This is basically the Van Jacobson + * congestion algorithm: If a retransmit occurs, the congestion window is + * halved; otherwise, it is incremented by 1/cwnd when + * + * - a reply is received and + * - a full number of requests are outstanding and + * - the congestion window hasn't been updated recently. */ void xprt_adjust_cwnd(struct rpc_xprt *xprt, struct rpc_task *task, int result) { @@ -745,6 +739,11 @@ static void xprt_connect_status(struct rpc_task *task) } switch (task->tk_status) { + case -ECONNREFUSED: + case -ECONNRESET: + case -ECONNABORTED: + case -ENETUNREACH: + case -EHOSTUNREACH: case -EAGAIN: dprintk("RPC: %5u xprt_connect_status: retrying\n", task->tk_pid); break; @@ -854,24 +853,36 @@ static inline int xprt_has_timer(struct rpc_xprt *xprt) * @task: RPC task about to send a request * */ -int xprt_prepare_transmit(struct rpc_task *task) +bool xprt_prepare_transmit(struct rpc_task *task) { struct rpc_rqst *req = task->tk_rqstp; struct rpc_xprt *xprt = req->rq_xprt; - int err = 0; + bool ret = false; dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid); spin_lock_bh(&xprt->transport_lock); - if (req->rq_reply_bytes_recvd && !req->rq_bytes_sent) { - err = req->rq_reply_bytes_recvd; + if (!req->rq_bytes_sent) { + if (req->rq_reply_bytes_recvd) { + task->tk_status = req->rq_reply_bytes_recvd; + goto out_unlock; + } + if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT) + && xprt_connected(xprt) + && req->rq_connect_cookie == xprt->connect_cookie) { + xprt->ops->set_retrans_timeout(task); + rpc_sleep_on(&xprt->pending, task, xprt_timer); + goto out_unlock; + } + } + if (!xprt->ops->reserve_xprt(xprt, task)) { + task->tk_status = -EAGAIN; goto out_unlock; } - if (!xprt->ops->reserve_xprt(xprt, task)) - err = -EAGAIN; + ret = true; out_unlock: spin_unlock_bh(&xprt->transport_lock); - return err; + return ret; } void xprt_end_transmit(struct rpc_task *task) @@ -912,7 +923,6 @@ void xprt_transmit(struct rpc_task *task) } else if (!req->rq_bytes_sent) return; - req->rq_connect_cookie = xprt->connect_cookie; req->rq_xtime = ktime_get(); status = xprt->ops->send_request(task); if (status != 0) { @@ -938,12 +948,14 @@ void xprt_transmit(struct rpc_task *task) /* Don't race with disconnect */ if (!xprt_connected(xprt)) task->tk_status = -ENOTCONN; - else if (!req->rq_reply_bytes_recvd && rpc_reply_expected(task)) { + else { /* * Sleep on the pending queue since * we're expecting a reply. */ - rpc_sleep_on(&xprt->pending, task, xprt_timer); + if (!req->rq_reply_bytes_recvd && rpc_reply_expected(task)) + rpc_sleep_on(&xprt->pending, task, xprt_timer); + req->rq_connect_cookie = xprt->connect_cookie; } spin_unlock_bh(&xprt->transport_lock); } @@ -1087,11 +1099,9 @@ struct rpc_xprt *xprt_alloc(struct net *net, size_t size, for (i = 0; i < num_prealloc; i++) { req = kzalloc(sizeof(struct rpc_rqst), GFP_KERNEL); if (!req) - break; + goto out_free; list_add(&req->rq_list, &xprt->free); } - if (i < num_prealloc) - goto out_free; if (max_alloc > num_prealloc) xprt->max_reqs = max_alloc; else @@ -1173,7 +1183,7 @@ static inline __be32 xprt_alloc_xid(struct rpc_xprt *xprt) static inline void xprt_init_xid(struct rpc_xprt *xprt) { - xprt->xid = net_random(); + xprt->xid = prandom_u32(); } static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) @@ -1186,6 +1196,12 @@ static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) req->rq_xprt = xprt; req->rq_buffer = NULL; req->rq_xid = xprt_alloc_xid(xprt); + req->rq_connect_cookie = xprt->connect_cookie - 1; + req->rq_bytes_sent = 0; + req->rq_snd_buf.len = 0; + req->rq_snd_buf.buflen = 0; + req->rq_rcv_buf.len = 0; + req->rq_rcv_buf.buflen = 0; req->rq_release_snd_buf = NULL; xprt_reset_majortimeo(req); dprintk("RPC: %5u reserved req %p xid %08x\n", task->tk_pid, @@ -1357,15 +1373,3 @@ void xprt_put(struct rpc_xprt *xprt) if (atomic_dec_and_test(&xprt->count)) xprt_destroy(xprt); } - -/** - * xprt_get - return a reference to an RPC transport. - * @xprt: pointer to the transport - * - */ -struct rpc_xprt *xprt_get(struct rpc_xprt *xprt) -{ - if (atomic_inc_not_zero(&xprt->count)) - return xprt; - return NULL; -} diff --git a/net/sunrpc/xprtrdma/Makefile b/net/sunrpc/xprtrdma/Makefile index 5a8f268bdd3..da5136fd569 100644 --- a/net/sunrpc/xprtrdma/Makefile +++ b/net/sunrpc/xprtrdma/Makefile @@ -1,8 +1,8 @@ -obj-$(CONFIG_SUNRPC_XPRT_RDMA) += xprtrdma.o +obj-$(CONFIG_SUNRPC_XPRT_RDMA_CLIENT) += xprtrdma.o xprtrdma-y := transport.o rpc_rdma.o verbs.o -obj-$(CONFIG_SUNRPC_XPRT_RDMA) += svcrdma.o +obj-$(CONFIG_SUNRPC_XPRT_RDMA_SERVER) += svcrdma.o svcrdma-y := svc_rdma.o svc_rdma_transport.o \ svc_rdma_marshal.o svc_rdma_sendto.o svc_rdma_recvfrom.o diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index e03725bfe2b..693966d3f33 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -78,8 +78,7 @@ static const char transfertypes[][12] = { * elements. Segments are then coalesced when registered, if possible * within the selected memreg mode. * - * Note, this routine is never called if the connection's memory - * registration strategy is 0 (bounce buffers). + * Returns positive number of segments converted, or a negative errno. */ static int @@ -102,10 +101,17 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, page_base = xdrbuf->page_base & ~PAGE_MASK; p = 0; while (len && n < nsegs) { + if (!ppages[p]) { + /* alloc the pagelist for receiving buffer */ + ppages[p] = alloc_page(GFP_ATOMIC); + if (!ppages[p]) + return -ENOMEM; + } seg[n].mr_page = ppages[p]; seg[n].mr_offset = (void *)(unsigned long) page_base; seg[n].mr_len = min_t(u32, PAGE_SIZE - page_base, len); - BUG_ON(seg[n].mr_len > PAGE_SIZE); + if (seg[n].mr_len > PAGE_SIZE) + return -EIO; len -= seg[n].mr_len; ++n; ++p; @@ -114,7 +120,7 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, /* Message overflows the seg array */ if (len && n == nsegs) - return 0; + return -EIO; if (xdrbuf->tail[0].iov_len) { /* the rpcrdma protocol allows us to omit any trailing @@ -123,7 +129,7 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, return n; if (n == nsegs) /* Tail remains, but we're out of segments */ - return 0; + return -EIO; seg[n].mr_page = NULL; seg[n].mr_offset = xdrbuf->tail[0].iov_base; seg[n].mr_len = xdrbuf->tail[0].iov_len; @@ -164,15 +170,17 @@ rpcrdma_convert_iovs(struct xdr_buf *xdrbuf, unsigned int pos, * Reply chunk (a counted array): * N elements: * 1 - N - HLOO - HLOO - ... - HLOO + * + * Returns positive RPC/RDMA header size, or negative errno. */ -static unsigned int +static ssize_t rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, struct rpcrdma_msg *headerp, enum rpcrdma_chunktype type) { struct rpcrdma_req *req = rpcr_to_rdmar(rqst); struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt); - int nsegs, nchunks = 0; + int n, nsegs, nchunks = 0; unsigned int pos; struct rpcrdma_mr_seg *seg = req->rl_segments; struct rpcrdma_read_chunk *cur_rchunk = NULL; @@ -198,12 +206,11 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, pos = target->head[0].iov_len; nsegs = rpcrdma_convert_iovs(target, pos, type, seg, RPCRDMA_MAX_SEGS); - if (nsegs == 0) - return 0; + if (nsegs < 0) + return nsegs; do { - /* bind/register the memory, then build chunk from result. */ - int n = rpcrdma_register_external(seg, nsegs, + n = rpcrdma_register_external(seg, nsegs, cur_wchunk != NULL, r_xprt); if (n <= 0) goto out; @@ -248,10 +255,6 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, /* success. all failures return above */ req->rl_nchunks = nchunks; - BUG_ON(nchunks == 0); - BUG_ON((r_xprt->rx_ia.ri_memreg_strategy == RPCRDMA_FRMR) - && (nchunks > 3)); - /* * finish off header. If write, marshal discrim and nchunks. */ @@ -278,8 +281,8 @@ rpcrdma_create_chunks(struct rpc_rqst *rqst, struct xdr_buf *target, out: for (pos = 0; nchunks--;) pos += rpcrdma_deregister_external( - &req->rl_segments[pos], r_xprt, NULL); - return 0; + &req->rl_segments[pos], r_xprt); + return n; } /* @@ -361,6 +364,8 @@ rpcrdma_inline_pullup(struct rpc_rqst *rqst, int pad) * [1] -- the RPC header/data, marshaled by RPC and the NFS protocol. * [2] -- optional padding. * [3] -- if padded, header only in [1] and data here. + * + * Returns zero on success, otherwise a negative errno. */ int @@ -370,7 +375,8 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); struct rpcrdma_req *req = rpcr_to_rdmar(rqst); char *base; - size_t hdrlen, rpclen, padlen; + size_t rpclen, padlen; + ssize_t hdrlen; enum rpcrdma_chunktype rtype, wtype; struct rpcrdma_msg *headerp; @@ -441,14 +447,10 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) /* The following simplification is not true forever */ if (rtype != rpcrdma_noch && wtype == rpcrdma_replych) wtype = rpcrdma_noch; - BUG_ON(rtype != rpcrdma_noch && wtype != rpcrdma_noch); - - if (r_xprt->rx_ia.ri_memreg_strategy == RPCRDMA_BOUNCEBUFFERS && - (rtype != rpcrdma_noch || wtype != rpcrdma_noch)) { - /* forced to "pure inline"? */ - dprintk("RPC: %s: too much data (%d/%d) for inline\n", - __func__, rqst->rq_rcv_buf.len, rqst->rq_snd_buf.len); - return -1; + if (rtype != rpcrdma_noch && wtype != rpcrdma_noch) { + dprintk("RPC: %s: cannot marshal multiple chunk lists\n", + __func__); + return -EIO; } hdrlen = 28; /*sizeof *headerp;*/ @@ -474,8 +476,11 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) headerp->rm_body.rm_padded.rm_pempty[1] = xdr_zero; headerp->rm_body.rm_padded.rm_pempty[2] = xdr_zero; hdrlen += 2 * sizeof(u32); /* extra words in padhdr */ - BUG_ON(wtype != rpcrdma_noch); - + if (wtype != rpcrdma_noch) { + dprintk("RPC: %s: invalid chunk list\n", + __func__); + return -EIO; + } } else { headerp->rm_body.rm_nochunks.rm_empty[0] = xdr_zero; headerp->rm_body.rm_nochunks.rm_empty[1] = xdr_zero; @@ -492,8 +497,7 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) * on receive. Therefore, we request a reply chunk * for non-writes wherever feasible and efficient. */ - if (wtype == rpcrdma_noch && - r_xprt->rx_ia.ri_memreg_strategy > RPCRDMA_REGISTER) + if (wtype == rpcrdma_noch) wtype = rpcrdma_replych; } } @@ -511,9 +515,8 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) hdrlen = rpcrdma_create_chunks(rqst, &rqst->rq_rcv_buf, headerp, wtype); } - - if (hdrlen == 0) - return -1; + if (hdrlen < 0) + return hdrlen; dprintk("RPC: %s: %s: hdrlen %zd rpclen %zd padlen %zd" " headerp 0x%p base 0x%p lkey 0x%x\n", @@ -649,9 +652,7 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad) break; page_base = 0; } - rqst->rq_rcv_buf.page_len = olen - copy_len; - } else - rqst->rq_rcv_buf.page_len = 0; + } if (copy_len && rqst->rq_rcv_buf.tail[0].iov_len) { curlen = copy_len; @@ -682,15 +683,11 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad) rqst->rq_private_buf = rqst->rq_rcv_buf; } -/* - * This function is called when an async event is posted to - * the connection which changes the connection state. All it - * does at this point is mark the connection up/down, the rpc - * timers do the rest. - */ void -rpcrdma_conn_func(struct rpcrdma_ep *ep) +rpcrdma_connect_worker(struct work_struct *work) { + struct rpcrdma_ep *ep = + container_of(work, struct rpcrdma_ep, rep_connect_worker.work); struct rpc_xprt *xprt = ep->rep_xprt; spin_lock_bh(&xprt->transport_lock); @@ -707,13 +704,15 @@ rpcrdma_conn_func(struct rpcrdma_ep *ep) } /* - * This function is called when memory window unbind which we are waiting - * for completes. Just use rr_func (zeroed by upcall) to signal completion. + * This function is called when an async event is posted to + * the connection which changes the connection state. All it + * does at this point is mark the connection up/down, the rpc + * timers do the rest. */ -static void -rpcrdma_unbind_func(struct rpcrdma_rep *rep) +void +rpcrdma_conn_func(struct rpcrdma_ep *ep) { - wake_up(&rep->rr_unbind); + schedule_delayed_work(&ep->rep_connect_worker, 0); } /* @@ -730,7 +729,8 @@ rpcrdma_reply_handler(struct rpcrdma_rep *rep) struct rpc_xprt *xprt = rep->rr_xprt; struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); __be32 *iptr; - int i, rdmalen, status; + int rdmalen, status; + unsigned long cwnd; /* Check status. If bad, signal disconnect and return rep to pool */ if (rep->rr_len == ~0U) { @@ -785,6 +785,7 @@ repost: /* from here on, the reply is no longer an orphan */ req->rl_reply = rep; + xprt->reestablish_timeout = 0; /* check for expected message types */ /* The order of some of these tests is important. */ @@ -859,26 +860,10 @@ badheader: break; } - /* If using mw bind, start the deregister process now. */ - /* (Note: if mr_free(), cannot perform it here, in tasklet context) */ - if (req->rl_nchunks) switch (r_xprt->rx_ia.ri_memreg_strategy) { - case RPCRDMA_MEMWINDOWS: - for (i = 0; req->rl_nchunks-- > 1;) - i += rpcrdma_deregister_external( - &req->rl_segments[i], r_xprt, NULL); - /* Optionally wait (not here) for unbinds to complete */ - rep->rr_func = rpcrdma_unbind_func; - (void) rpcrdma_deregister_external(&req->rl_segments[i], - r_xprt, rep); - break; - case RPCRDMA_MEMWINDOWS_ASYNC: - for (i = 0; req->rl_nchunks--;) - i += rpcrdma_deregister_external(&req->rl_segments[i], - r_xprt, NULL); - break; - default: - break; - } + cwnd = xprt->cwnd; + xprt->cwnd = atomic_read(&r_xprt->rx_buf.rb_credits) << RPC_CWNDSHIFT; + if (xprt->cwnd > cwnd) + xprt_release_rqst_cong(rqst->rq_task); dprintk("RPC: %s: xprt_complete_rqst(0x%p, 0x%p, %d)\n", __func__, xprt, rqst, status); diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 0ce75524ed2..8f92a61ee2d 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -69,7 +70,8 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, /* Set up the XDR head */ rqstp->rq_arg.head[0].iov_base = page_address(page); - rqstp->rq_arg.head[0].iov_len = min(byte_count, ctxt->sge[0].length); + rqstp->rq_arg.head[0].iov_len = + min_t(size_t, byte_count, ctxt->sge[0].length); rqstp->rq_arg.len = byte_count; rqstp->rq_arg.buflen = byte_count; @@ -85,11 +87,12 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, page = ctxt->pages[sge_no]; put_page(rqstp->rq_pages[sge_no]); rqstp->rq_pages[sge_no] = page; - bc -= min(bc, ctxt->sge[sge_no].length); + bc -= min_t(u32, bc, ctxt->sge[sge_no].length); rqstp->rq_arg.buflen += ctxt->sge[sge_no].length; sge_no++; } rqstp->rq_respages = &rqstp->rq_pages[sge_no]; + rqstp->rq_next_page = rqstp->rq_respages + 1; /* We should never run out of SGE because the limit is defined to * support the max allowed RPC data length @@ -112,289 +115,265 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, rqstp->rq_arg.tail[0].iov_len = 0; } -/* Encode a read-chunk-list as an array of IB SGE - * - * Assumptions: - * - chunk[0]->position points to pages[0] at an offset of 0 - * - pages[] is not physically or virtually contiguous and consists of - * PAGE_SIZE elements. - * - * Output: - * - sge array pointing into pages[] array. - * - chunk_sge array specifying sge index and count for each - * chunk in the read list - * - */ -static int map_read_chunks(struct svcxprt_rdma *xprt, - struct svc_rqst *rqstp, - struct svc_rdma_op_ctxt *head, - struct rpcrdma_msg *rmsgp, - struct svc_rdma_req_map *rpl_map, - struct svc_rdma_req_map *chl_map, - int ch_count, - int byte_count) +static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) { - int sge_no; - int sge_bytes; - int page_off; - int page_no; - int ch_bytes; - int ch_no; - struct rpcrdma_read_chunk *ch; + if (rdma_node_get_transport(xprt->sc_cm_id->device->node_type) == + RDMA_TRANSPORT_IWARP) + return 1; + else + return min_t(int, sge_count, xprt->sc_max_sge); +} - sge_no = 0; - page_no = 0; - page_off = 0; - ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; - ch_no = 0; - ch_bytes = ntohl(ch->rc_target.rs_length); - head->arg.head[0] = rqstp->rq_arg.head[0]; - head->arg.tail[0] = rqstp->rq_arg.tail[0]; - head->arg.pages = &head->pages[head->count]; - head->hdr_count = head->count; /* save count of hdr pages */ - head->arg.page_base = 0; - head->arg.page_len = ch_bytes; - head->arg.len = rqstp->rq_arg.len + ch_bytes; - head->arg.buflen = rqstp->rq_arg.buflen + ch_bytes; - head->count++; - chl_map->ch[0].start = 0; - while (byte_count) { - rpl_map->sge[sge_no].iov_base = - page_address(rqstp->rq_arg.pages[page_no]) + page_off; - sge_bytes = min_t(int, PAGE_SIZE-page_off, ch_bytes); - rpl_map->sge[sge_no].iov_len = sge_bytes; - /* - * Don't bump head->count here because the same page - * may be used by multiple SGE. - */ - head->arg.pages[page_no] = rqstp->rq_arg.pages[page_no]; - rqstp->rq_respages = &rqstp->rq_arg.pages[page_no+1]; +typedef int (*rdma_reader_fn)(struct svcxprt_rdma *xprt, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head, + int *page_no, + u32 *page_offset, + u32 rs_handle, + u32 rs_length, + u64 rs_offset, + int last); + +/* Issue an RDMA_READ using the local lkey to map the data sink */ +static int rdma_read_chunk_lcl(struct svcxprt_rdma *xprt, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head, + int *page_no, + u32 *page_offset, + u32 rs_handle, + u32 rs_length, + u64 rs_offset, + int last) +{ + struct ib_send_wr read_wr; + int pages_needed = PAGE_ALIGN(*page_offset + rs_length) >> PAGE_SHIFT; + struct svc_rdma_op_ctxt *ctxt = svc_rdma_get_context(xprt); + int ret, read, pno; + u32 pg_off = *page_offset; + u32 pg_no = *page_no; - byte_count -= sge_bytes; - ch_bytes -= sge_bytes; - sge_no++; - /* - * If all bytes for this chunk have been mapped to an - * SGE, move to the next SGE - */ - if (ch_bytes == 0) { - chl_map->ch[ch_no].count = - sge_no - chl_map->ch[ch_no].start; - ch_no++; - ch++; - chl_map->ch[ch_no].start = sge_no; - ch_bytes = ntohl(ch->rc_target.rs_length); - /* If bytes remaining account for next chunk */ - if (byte_count) { - head->arg.page_len += ch_bytes; - head->arg.len += ch_bytes; - head->arg.buflen += ch_bytes; - } + ctxt->direction = DMA_FROM_DEVICE; + ctxt->read_hdr = head; + pages_needed = + min_t(int, pages_needed, rdma_read_max_sge(xprt, pages_needed)); + read = min_t(int, pages_needed << PAGE_SHIFT, rs_length); + + for (pno = 0; pno < pages_needed; pno++) { + int len = min_t(int, rs_length, PAGE_SIZE - pg_off); + + head->arg.pages[pg_no] = rqstp->rq_arg.pages[pg_no]; + head->arg.page_len += len; + head->arg.len += len; + if (!pg_off) + head->count++; + rqstp->rq_respages = &rqstp->rq_arg.pages[pg_no+1]; + rqstp->rq_next_page = rqstp->rq_respages + 1; + ctxt->sge[pno].addr = + ib_dma_map_page(xprt->sc_cm_id->device, + head->arg.pages[pg_no], pg_off, + PAGE_SIZE - pg_off, + DMA_FROM_DEVICE); + ret = ib_dma_mapping_error(xprt->sc_cm_id->device, + ctxt->sge[pno].addr); + if (ret) + goto err; + atomic_inc(&xprt->sc_dma_used); + + /* The lkey here is either a local dma lkey or a dma_mr lkey */ + ctxt->sge[pno].lkey = xprt->sc_dma_lkey; + ctxt->sge[pno].length = len; + ctxt->count++; + + /* adjust offset and wrap to next page if needed */ + pg_off += len; + if (pg_off == PAGE_SIZE) { + pg_off = 0; + pg_no++; } - /* - * If this SGE consumed all of the page, move to the - * next page - */ - if ((sge_bytes + page_off) == PAGE_SIZE) { - page_no++; - page_off = 0; - /* - * If there are still bytes left to map, bump - * the page count - */ - if (byte_count) - head->count++; - } else - page_off += sge_bytes; + rs_length -= len; } - BUG_ON(byte_count != 0); - return sge_no; + + if (last && rs_length == 0) + set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + else + clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + + memset(&read_wr, 0, sizeof(read_wr)); + read_wr.wr_id = (unsigned long)ctxt; + read_wr.opcode = IB_WR_RDMA_READ; + ctxt->wr_op = read_wr.opcode; + read_wr.send_flags = IB_SEND_SIGNALED; + read_wr.wr.rdma.rkey = rs_handle; + read_wr.wr.rdma.remote_addr = rs_offset; + read_wr.sg_list = ctxt->sge; + read_wr.num_sge = pages_needed; + + ret = svc_rdma_send(xprt, &read_wr); + if (ret) { + pr_err("svcrdma: Error %d posting RDMA_READ\n", ret); + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + goto err; + } + + /* return current location in page array */ + *page_no = pg_no; + *page_offset = pg_off; + ret = read; + atomic_inc(&rdma_stat_read); + return ret; + err: + svc_rdma_unmap_dma(ctxt); + svc_rdma_put_context(ctxt, 0); + return ret; } -/* Map a read-chunk-list to an XDR and fast register the page-list. - * - * Assumptions: - * - chunk[0] position points to pages[0] at an offset of 0 - * - pages[] will be made physically contiguous by creating a one-off memory - * region using the fastreg verb. - * - byte_count is # of bytes in read-chunk-list - * - ch_count is # of chunks in read-chunk-list - * - * Output: - * - sge array pointing into pages[] array. - * - chunk_sge array specifying sge index and count for each - * chunk in the read list - */ -static int fast_reg_read_chunks(struct svcxprt_rdma *xprt, +/* Issue an RDMA_READ using an FRMR to map the data sink */ +static int rdma_read_chunk_frmr(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, struct svc_rdma_op_ctxt *head, - struct rpcrdma_msg *rmsgp, - struct svc_rdma_req_map *rpl_map, - struct svc_rdma_req_map *chl_map, - int ch_count, - int byte_count) + int *page_no, + u32 *page_offset, + u32 rs_handle, + u32 rs_length, + u64 rs_offset, + int last) { - int page_no; - int ch_no; - u32 offset; - struct rpcrdma_read_chunk *ch; - struct svc_rdma_fastreg_mr *frmr; - int ret = 0; + struct ib_send_wr read_wr; + struct ib_send_wr inv_wr; + struct ib_send_wr fastreg_wr; + u8 key; + int pages_needed = PAGE_ALIGN(*page_offset + rs_length) >> PAGE_SHIFT; + struct svc_rdma_op_ctxt *ctxt = svc_rdma_get_context(xprt); + struct svc_rdma_fastreg_mr *frmr = svc_rdma_get_frmr(xprt); + int ret, read, pno; + u32 pg_off = *page_offset; + u32 pg_no = *page_no; - frmr = svc_rdma_get_frmr(xprt); if (IS_ERR(frmr)) return -ENOMEM; - head->frmr = frmr; - head->arg.head[0] = rqstp->rq_arg.head[0]; - head->arg.tail[0] = rqstp->rq_arg.tail[0]; - head->arg.pages = &head->pages[head->count]; - head->hdr_count = head->count; /* save count of hdr pages */ - head->arg.page_base = 0; - head->arg.page_len = byte_count; - head->arg.len = rqstp->rq_arg.len + byte_count; - head->arg.buflen = rqstp->rq_arg.buflen + byte_count; + ctxt->direction = DMA_FROM_DEVICE; + ctxt->frmr = frmr; + pages_needed = min_t(int, pages_needed, xprt->sc_frmr_pg_list_len); + read = min_t(int, pages_needed << PAGE_SHIFT, rs_length); - /* Fast register the page list */ - frmr->kva = page_address(rqstp->rq_arg.pages[0]); + frmr->kva = page_address(rqstp->rq_arg.pages[pg_no]); frmr->direction = DMA_FROM_DEVICE; frmr->access_flags = (IB_ACCESS_LOCAL_WRITE|IB_ACCESS_REMOTE_WRITE); - frmr->map_len = byte_count; - frmr->page_list_len = PAGE_ALIGN(byte_count) >> PAGE_SHIFT; - for (page_no = 0; page_no < frmr->page_list_len; page_no++) { - frmr->page_list->page_list[page_no] = + frmr->map_len = pages_needed << PAGE_SHIFT; + frmr->page_list_len = pages_needed; + + for (pno = 0; pno < pages_needed; pno++) { + int len = min_t(int, rs_length, PAGE_SIZE - pg_off); + + head->arg.pages[pg_no] = rqstp->rq_arg.pages[pg_no]; + head->arg.page_len += len; + head->arg.len += len; + if (!pg_off) + head->count++; + rqstp->rq_respages = &rqstp->rq_arg.pages[pg_no+1]; + rqstp->rq_next_page = rqstp->rq_respages + 1; + frmr->page_list->page_list[pno] = ib_dma_map_page(xprt->sc_cm_id->device, - rqstp->rq_arg.pages[page_no], 0, + head->arg.pages[pg_no], 0, PAGE_SIZE, DMA_FROM_DEVICE); - if (ib_dma_mapping_error(xprt->sc_cm_id->device, - frmr->page_list->page_list[page_no])) - goto fatal_err; + ret = ib_dma_mapping_error(xprt->sc_cm_id->device, + frmr->page_list->page_list[pno]); + if (ret) + goto err; atomic_inc(&xprt->sc_dma_used); - head->arg.pages[page_no] = rqstp->rq_arg.pages[page_no]; - } - head->count += page_no; - /* rq_respages points one past arg pages */ - rqstp->rq_respages = &rqstp->rq_arg.pages[page_no]; - - /* Create the reply and chunk maps */ - offset = 0; - ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; - for (ch_no = 0; ch_no < ch_count; ch_no++) { - int len = ntohl(ch->rc_target.rs_length); - rpl_map->sge[ch_no].iov_base = frmr->kva + offset; - rpl_map->sge[ch_no].iov_len = len; - chl_map->ch[ch_no].count = 1; - chl_map->ch[ch_no].start = ch_no; - offset += len; - ch++; + /* adjust offset and wrap to next page if needed */ + pg_off += len; + if (pg_off == PAGE_SIZE) { + pg_off = 0; + pg_no++; + } + rs_length -= len; } - ret = svc_rdma_fastreg(xprt, frmr); - if (ret) - goto fatal_err; - - return ch_no; - - fatal_err: - printk("svcrdma: error fast registering xdr for xprt %p", xprt); - svc_rdma_put_frmr(xprt, frmr); - return -EIO; -} - -static int rdma_set_ctxt_sge(struct svcxprt_rdma *xprt, - struct svc_rdma_op_ctxt *ctxt, - struct svc_rdma_fastreg_mr *frmr, - struct kvec *vec, - u64 *sgl_offset, - int count) -{ - int i; - unsigned long off; + if (last && rs_length == 0) + set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); + else + clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); - ctxt->count = count; - ctxt->direction = DMA_FROM_DEVICE; - for (i = 0; i < count; i++) { - ctxt->sge[i].length = 0; /* in case map fails */ - if (!frmr) { - BUG_ON(!virt_to_page(vec[i].iov_base)); - off = (unsigned long)vec[i].iov_base & ~PAGE_MASK; - ctxt->sge[i].addr = - ib_dma_map_page(xprt->sc_cm_id->device, - virt_to_page(vec[i].iov_base), - off, - vec[i].iov_len, - DMA_FROM_DEVICE); - if (ib_dma_mapping_error(xprt->sc_cm_id->device, - ctxt->sge[i].addr)) - return -EINVAL; - ctxt->sge[i].lkey = xprt->sc_dma_lkey; - atomic_inc(&xprt->sc_dma_used); - } else { - ctxt->sge[i].addr = (unsigned long)vec[i].iov_base; - ctxt->sge[i].lkey = frmr->mr->lkey; - } - ctxt->sge[i].length = vec[i].iov_len; - *sgl_offset = *sgl_offset + vec[i].iov_len; + /* Bump the key */ + key = (u8)(frmr->mr->lkey & 0x000000FF); + ib_update_fast_reg_key(frmr->mr, ++key); + + ctxt->sge[0].addr = (unsigned long)frmr->kva + *page_offset; + ctxt->sge[0].lkey = frmr->mr->lkey; + ctxt->sge[0].length = read; + ctxt->count = 1; + ctxt->read_hdr = head; + + /* Prepare FASTREG WR */ + memset(&fastreg_wr, 0, sizeof(fastreg_wr)); + fastreg_wr.opcode = IB_WR_FAST_REG_MR; + fastreg_wr.send_flags = IB_SEND_SIGNALED; + fastreg_wr.wr.fast_reg.iova_start = (unsigned long)frmr->kva; + fastreg_wr.wr.fast_reg.page_list = frmr->page_list; + fastreg_wr.wr.fast_reg.page_list_len = frmr->page_list_len; + fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; + fastreg_wr.wr.fast_reg.length = frmr->map_len; + fastreg_wr.wr.fast_reg.access_flags = frmr->access_flags; + fastreg_wr.wr.fast_reg.rkey = frmr->mr->lkey; + fastreg_wr.next = &read_wr; + + /* Prepare RDMA_READ */ + memset(&read_wr, 0, sizeof(read_wr)); + read_wr.send_flags = IB_SEND_SIGNALED; + read_wr.wr.rdma.rkey = rs_handle; + read_wr.wr.rdma.remote_addr = rs_offset; + read_wr.sg_list = ctxt->sge; + read_wr.num_sge = 1; + if (xprt->sc_dev_caps & SVCRDMA_DEVCAP_READ_W_INV) { + read_wr.opcode = IB_WR_RDMA_READ_WITH_INV; + read_wr.wr_id = (unsigned long)ctxt; + read_wr.ex.invalidate_rkey = ctxt->frmr->mr->lkey; + } else { + read_wr.opcode = IB_WR_RDMA_READ; + read_wr.next = &inv_wr; + /* Prepare invalidate */ + memset(&inv_wr, 0, sizeof(inv_wr)); + inv_wr.wr_id = (unsigned long)ctxt; + inv_wr.opcode = IB_WR_LOCAL_INV; + inv_wr.send_flags = IB_SEND_SIGNALED | IB_SEND_FENCE; + inv_wr.ex.invalidate_rkey = frmr->mr->lkey; + } + ctxt->wr_op = read_wr.opcode; + + /* Post the chain */ + ret = svc_rdma_send(xprt, &fastreg_wr); + if (ret) { + pr_err("svcrdma: Error %d posting RDMA_READ\n", ret); + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + goto err; } - return 0; -} -static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) -{ - if ((rdma_node_get_transport(xprt->sc_cm_id->device->node_type) == - RDMA_TRANSPORT_IWARP) && - sge_count > 1) - return 1; - else - return min_t(int, sge_count, xprt->sc_max_sge); + /* return current location in page array */ + *page_no = pg_no; + *page_offset = pg_off; + ret = read; + atomic_inc(&rdma_stat_read); + return ret; + err: + svc_rdma_unmap_dma(ctxt); + svc_rdma_put_context(ctxt, 0); + svc_rdma_put_frmr(xprt, frmr); + return ret; } -/* - * Use RDMA_READ to read data from the advertised client buffer into the - * XDR stream starting at rq_arg.head[0].iov_base. - * Each chunk in the array - * contains the following fields: - * discrim - '1', This isn't used for data placement - * position - The xdr stream offset (the same for every chunk) - * handle - RMR for client memory region - * length - data transfer length - * offset - 64 bit tagged offset in remote memory region - * - * On our side, we need to read into a pagelist. The first page immediately - * follows the RPC header. - * - * This function returns: - * 0 - No error and no read-list found. - * - * 1 - Successful read-list processing. The data is not yet in - * the pagelist and therefore the RPC request must be deferred. The - * I/O completion will enqueue the transport again and - * svc_rdma_recvfrom will complete the request. - * - * <0 - Error processing/posting read-list. - * - * NOTE: The ctxt must not be touched after the last WR has been posted - * because the I/O completion processing may occur on another - * processor and free / modify the context. Ne touche pas! - */ -static int rdma_read_xdr(struct svcxprt_rdma *xprt, - struct rpcrdma_msg *rmsgp, - struct svc_rqst *rqstp, - struct svc_rdma_op_ctxt *hdr_ctxt) +static int rdma_read_chunks(struct svcxprt_rdma *xprt, + struct rpcrdma_msg *rmsgp, + struct svc_rqst *rqstp, + struct svc_rdma_op_ctxt *head) { - struct ib_send_wr read_wr; - struct ib_send_wr inv_wr; - int err = 0; - int ch_no; - int ch_count; - int byte_count; - int sge_count; - u64 sgl_offset; + int page_no, ch_count, ret; struct rpcrdma_read_chunk *ch; - struct svc_rdma_op_ctxt *ctxt = NULL; - struct svc_rdma_req_map *rpl_map; - struct svc_rdma_req_map *chl_map; + u32 page_offset, byte_count; + u64 rs_offset; + rdma_reader_fn reader; /* If no read list is present, return 0 */ ch = svc_rdma_get_read_chunk(rmsgp); @@ -405,129 +384,55 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt, if (ch_count > RPCSVC_MAXPAGES) return -EINVAL; - /* Allocate temporary reply and chunk maps */ - rpl_map = svc_rdma_get_req_map(); - chl_map = svc_rdma_get_req_map(); + /* The request is completed when the RDMA_READs complete. The + * head context keeps all the pages that comprise the + * request. + */ + head->arg.head[0] = rqstp->rq_arg.head[0]; + head->arg.tail[0] = rqstp->rq_arg.tail[0]; + head->arg.pages = &head->pages[head->count]; + head->hdr_count = head->count; + head->arg.page_base = 0; + head->arg.page_len = 0; + head->arg.len = rqstp->rq_arg.len; + head->arg.buflen = rqstp->rq_arg.buflen; - if (!xprt->sc_frmr_pg_list_len) - sge_count = map_read_chunks(xprt, rqstp, hdr_ctxt, rmsgp, - rpl_map, chl_map, ch_count, - byte_count); + /* Use FRMR if supported */ + if (xprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG) + reader = rdma_read_chunk_frmr; else - sge_count = fast_reg_read_chunks(xprt, rqstp, hdr_ctxt, rmsgp, - rpl_map, chl_map, ch_count, - byte_count); - if (sge_count < 0) { - err = -EIO; - goto out; - } - - sgl_offset = 0; - ch_no = 0; + reader = rdma_read_chunk_lcl; + page_no = 0; page_offset = 0; for (ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0]; - ch->rc_discrim != 0; ch++, ch_no++) { - u64 rs_offset; -next_sge: - ctxt = svc_rdma_get_context(xprt); - ctxt->direction = DMA_FROM_DEVICE; - ctxt->frmr = hdr_ctxt->frmr; - ctxt->read_hdr = NULL; - clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); - clear_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); + ch->rc_discrim != 0; ch++) { - /* Prepare READ WR */ - memset(&read_wr, 0, sizeof read_wr); - read_wr.wr_id = (unsigned long)ctxt; - read_wr.opcode = IB_WR_RDMA_READ; - ctxt->wr_op = read_wr.opcode; - read_wr.send_flags = IB_SEND_SIGNALED; - read_wr.wr.rdma.rkey = ntohl(ch->rc_target.rs_handle); xdr_decode_hyper((__be32 *)&ch->rc_target.rs_offset, &rs_offset); - read_wr.wr.rdma.remote_addr = rs_offset + sgl_offset; - read_wr.sg_list = ctxt->sge; - read_wr.num_sge = - rdma_read_max_sge(xprt, chl_map->ch[ch_no].count); - err = rdma_set_ctxt_sge(xprt, ctxt, hdr_ctxt->frmr, - &rpl_map->sge[chl_map->ch[ch_no].start], - &sgl_offset, - read_wr.num_sge); - if (err) { - svc_rdma_unmap_dma(ctxt); - svc_rdma_put_context(ctxt, 0); - goto out; - } - if (((ch+1)->rc_discrim == 0) && - (read_wr.num_sge == chl_map->ch[ch_no].count)) { - /* - * Mark the last RDMA_READ with a bit to - * indicate all RPC data has been fetched from - * the client and the RPC needs to be enqueued. - */ - set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags); - if (hdr_ctxt->frmr) { - set_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); - /* - * Invalidate the local MR used to map the data - * sink. - */ - if (xprt->sc_dev_caps & - SVCRDMA_DEVCAP_READ_W_INV) { - read_wr.opcode = - IB_WR_RDMA_READ_WITH_INV; - ctxt->wr_op = read_wr.opcode; - read_wr.ex.invalidate_rkey = - ctxt->frmr->mr->lkey; - } else { - /* Prepare INVALIDATE WR */ - memset(&inv_wr, 0, sizeof inv_wr); - inv_wr.opcode = IB_WR_LOCAL_INV; - inv_wr.send_flags = IB_SEND_SIGNALED; - inv_wr.ex.invalidate_rkey = - hdr_ctxt->frmr->mr->lkey; - read_wr.next = &inv_wr; - } - } - ctxt->read_hdr = hdr_ctxt; + byte_count = ntohl(ch->rc_target.rs_length); + + while (byte_count > 0) { + ret = reader(xprt, rqstp, head, + &page_no, &page_offset, + ntohl(ch->rc_target.rs_handle), + byte_count, rs_offset, + ((ch+1)->rc_discrim == 0) /* last */ + ); + if (ret < 0) + goto err; + byte_count -= ret; + rs_offset += ret; + head->arg.buflen += ret; } - /* Post the read */ - err = svc_rdma_send(xprt, &read_wr); - if (err) { - printk(KERN_ERR "svcrdma: Error %d posting RDMA_READ\n", - err); - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); - svc_rdma_unmap_dma(ctxt); - svc_rdma_put_context(ctxt, 0); - goto out; - } - atomic_inc(&rdma_stat_read); - - if (read_wr.num_sge < chl_map->ch[ch_no].count) { - chl_map->ch[ch_no].count -= read_wr.num_sge; - chl_map->ch[ch_no].start += read_wr.num_sge; - goto next_sge; - } - sgl_offset = 0; - err = 1; } - - out: - svc_rdma_put_req_map(rpl_map); - svc_rdma_put_req_map(chl_map); - + ret = 1; + err: /* Detach arg pages. svc_recv will replenish them */ - for (ch_no = 0; &rqstp->rq_pages[ch_no] < rqstp->rq_respages; ch_no++) - rqstp->rq_pages[ch_no] = NULL; - - /* - * Detach res pages. If svc_release sees any it will attempt to - * put them. - */ - while (rqstp->rq_next_page != rqstp->rq_respages) - *(--rqstp->rq_next_page) = NULL; + for (page_no = 0; + &rqstp->rq_pages[page_no] < rqstp->rq_respages; page_no++) + rqstp->rq_pages[page_no] = NULL; - return err; + return ret; } static int rdma_read_complete(struct svc_rqst *rqstp, @@ -550,7 +455,7 @@ static int rdma_read_complete(struct svc_rqst *rqstp, /* rq_respages starts after the last arg page */ rqstp->rq_respages = &rqstp->rq_arg.pages[page_no]; - rqstp->rq_next_page = &rqstp->rq_arg.pages[page_no]; + rqstp->rq_next_page = rqstp->rq_respages + 1; /* Rebuild rq_arg head and tail. */ rqstp->rq_arg.head[0] = head->arg.head[0]; @@ -599,13 +504,9 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) struct svc_rdma_op_ctxt, dto_q); list_del_init(&ctxt->dto_q); - } - if (ctxt) { spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock); return rdma_read_complete(rqstp, ctxt); - } - - if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { + } else if (!list_empty(&rdma_xprt->sc_rq_dto_q)) { ctxt = list_entry(rdma_xprt->sc_rq_dto_q.next, struct svc_rdma_op_ctxt, dto_q); @@ -625,7 +526,6 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) goto close_out; - BUG_ON(ret); goto out; } dprintk("svcrdma: processing ctxt=%p on xprt=%p, rqstp=%p, status=%d\n", @@ -648,12 +548,11 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) } /* Read read-list data. */ - ret = rdma_read_xdr(rdma_xprt, rmsgp, rqstp, ctxt); + ret = rdma_read_chunks(rdma_xprt, rmsgp, rqstp, ctxt); if (ret > 0) { /* read-list posted, defer until data received from client. */ goto defer; - } - if (ret < 0) { + } else if (ret < 0) { /* Post of read-list failed, free context. */ svc_rdma_put_context(ctxt, 1); return 0; diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index c1d124dc772..49fd21a5c21 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -49,152 +50,6 @@ #define RPCDBG_FACILITY RPCDBG_SVCXPRT -/* Encode an XDR as an array of IB SGE - * - * Assumptions: - * - head[0] is physically contiguous. - * - tail[0] is physically contiguous. - * - pages[] is not physically or virtually contiguous and consists of - * PAGE_SIZE elements. - * - * Output: - * SGE[0] reserved for RCPRDMA header - * SGE[1] data from xdr->head[] - * SGE[2..sge_count-2] data from xdr->pages[] - * SGE[sge_count-1] data from xdr->tail. - * - * The max SGE we need is the length of the XDR / pagesize + one for - * head + one for tail + one for RPCRDMA header. Since RPCSVC_MAXPAGES - * reserves a page for both the request and the reply header, and this - * array is only concerned with the reply we are assured that we have - * on extra page for the RPCRMDA header. - */ -static int fast_reg_xdr(struct svcxprt_rdma *xprt, - struct xdr_buf *xdr, - struct svc_rdma_req_map *vec) -{ - int sge_no; - u32 sge_bytes; - u32 page_bytes; - u32 page_off; - int page_no = 0; - u8 *frva; - struct svc_rdma_fastreg_mr *frmr; - - frmr = svc_rdma_get_frmr(xprt); - if (IS_ERR(frmr)) - return -ENOMEM; - vec->frmr = frmr; - - /* Skip the RPCRDMA header */ - sge_no = 1; - - /* Map the head. */ - frva = (void *)((unsigned long)(xdr->head[0].iov_base) & PAGE_MASK); - vec->sge[sge_no].iov_base = xdr->head[0].iov_base; - vec->sge[sge_no].iov_len = xdr->head[0].iov_len; - vec->count = 2; - sge_no++; - - /* Map the XDR head */ - frmr->kva = frva; - frmr->direction = DMA_TO_DEVICE; - frmr->access_flags = 0; - frmr->map_len = PAGE_SIZE; - frmr->page_list_len = 1; - page_off = (unsigned long)xdr->head[0].iov_base & ~PAGE_MASK; - frmr->page_list->page_list[page_no] = - ib_dma_map_page(xprt->sc_cm_id->device, - virt_to_page(xdr->head[0].iov_base), - page_off, - PAGE_SIZE - page_off, - DMA_TO_DEVICE); - if (ib_dma_mapping_error(xprt->sc_cm_id->device, - frmr->page_list->page_list[page_no])) - goto fatal_err; - atomic_inc(&xprt->sc_dma_used); - - /* Map the XDR page list */ - page_off = xdr->page_base; - page_bytes = xdr->page_len + page_off; - if (!page_bytes) - goto encode_tail; - - /* Map the pages */ - vec->sge[sge_no].iov_base = frva + frmr->map_len + page_off; - vec->sge[sge_no].iov_len = page_bytes; - sge_no++; - while (page_bytes) { - struct page *page; - - page = xdr->pages[page_no++]; - sge_bytes = min_t(u32, page_bytes, (PAGE_SIZE - page_off)); - page_bytes -= sge_bytes; - - frmr->page_list->page_list[page_no] = - ib_dma_map_page(xprt->sc_cm_id->device, - page, page_off, - sge_bytes, DMA_TO_DEVICE); - if (ib_dma_mapping_error(xprt->sc_cm_id->device, - frmr->page_list->page_list[page_no])) - goto fatal_err; - - atomic_inc(&xprt->sc_dma_used); - page_off = 0; /* reset for next time through loop */ - frmr->map_len += PAGE_SIZE; - frmr->page_list_len++; - } - vec->count++; - - encode_tail: - /* Map tail */ - if (0 == xdr->tail[0].iov_len) - goto done; - - vec->count++; - vec->sge[sge_no].iov_len = xdr->tail[0].iov_len; - - if (((unsigned long)xdr->tail[0].iov_base & PAGE_MASK) == - ((unsigned long)xdr->head[0].iov_base & PAGE_MASK)) { - /* - * If head and tail use the same page, we don't need - * to map it again. - */ - vec->sge[sge_no].iov_base = xdr->tail[0].iov_base; - } else { - void *va; - - /* Map another page for the tail */ - page_off = (unsigned long)xdr->tail[0].iov_base & ~PAGE_MASK; - va = (void *)((unsigned long)xdr->tail[0].iov_base & PAGE_MASK); - vec->sge[sge_no].iov_base = frva + frmr->map_len + page_off; - - frmr->page_list->page_list[page_no] = - ib_dma_map_page(xprt->sc_cm_id->device, virt_to_page(va), - page_off, - PAGE_SIZE, - DMA_TO_DEVICE); - if (ib_dma_mapping_error(xprt->sc_cm_id->device, - frmr->page_list->page_list[page_no])) - goto fatal_err; - atomic_inc(&xprt->sc_dma_used); - frmr->map_len += PAGE_SIZE; - frmr->page_list_len++; - } - - done: - if (svc_rdma_fastreg(xprt, frmr)) - goto fatal_err; - - return 0; - - fatal_err: - printk("svcrdma: Error fast registering memory for xprt %p\n", xprt); - vec->frmr = NULL; - svc_rdma_put_frmr(xprt, frmr); - return -EIO; -} - static int map_xdr(struct svcxprt_rdma *xprt, struct xdr_buf *xdr, struct svc_rdma_req_map *vec) @@ -208,9 +63,6 @@ static int map_xdr(struct svcxprt_rdma *xprt, BUG_ON(xdr->len != (xdr->head[0].iov_len + xdr->page_len + xdr->tail[0].iov_len)); - if (xprt->sc_frmr_pg_list_len) - return fast_reg_xdr(xprt, xdr, vec); - /* Skip the first sge, this is for the RPCRDMA header */ sge_no = 1; @@ -265,6 +117,7 @@ static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt, xdr_off -= xdr->head[0].iov_len; if (xdr_off < xdr->page_len) { /* This offset is in the page list */ + xdr_off += xdr->page_base; page = xdr->pages[xdr_off >> PAGE_SHIFT]; xdr_off &= ~PAGE_MASK; } else { @@ -281,8 +134,6 @@ static dma_addr_t dma_map_xdr(struct svcxprt_rdma *xprt, } /* Assumptions: - * - We are using FRMR - * - or - * - The specified write_len can be represented in sc_max_sge * PAGE_SIZE */ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, @@ -326,23 +177,16 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, sge_bytes = min_t(size_t, bc, vec->sge[xdr_sge_no].iov_len-sge_off); sge[sge_no].length = sge_bytes; - if (!vec->frmr) { - sge[sge_no].addr = - dma_map_xdr(xprt, &rqstp->rq_res, xdr_off, - sge_bytes, DMA_TO_DEVICE); - xdr_off += sge_bytes; - if (ib_dma_mapping_error(xprt->sc_cm_id->device, - sge[sge_no].addr)) - goto err; - atomic_inc(&xprt->sc_dma_used); - sge[sge_no].lkey = xprt->sc_dma_lkey; - } else { - sge[sge_no].addr = (unsigned long) - vec->sge[xdr_sge_no].iov_base + sge_off; - sge[sge_no].lkey = vec->frmr->mr->lkey; - } + sge[sge_no].addr = + dma_map_xdr(xprt, &rqstp->rq_res, xdr_off, + sge_bytes, DMA_TO_DEVICE); + xdr_off += sge_bytes; + if (ib_dma_mapping_error(xprt->sc_cm_id->device, + sge[sge_no].addr)) + goto err; + atomic_inc(&xprt->sc_dma_used); + sge[sge_no].lkey = xprt->sc_dma_lkey; ctxt->count++; - ctxt->frmr = vec->frmr; sge_off = 0; sge_no++; xdr_sge_no++; @@ -368,7 +212,6 @@ static int send_write(struct svcxprt_rdma *xprt, struct svc_rqst *rqstp, return 0; err: svc_rdma_unmap_dma(ctxt); - svc_rdma_put_frmr(xprt, vec->frmr); svc_rdma_put_context(ctxt, 0); /* Fatal error, close transport */ return -EIO; @@ -396,10 +239,7 @@ static int send_write_chunks(struct svcxprt_rdma *xprt, res_ary = (struct rpcrdma_write_array *) &rdma_resp->rm_body.rm_chunks[1]; - if (vec->frmr) - max_write = vec->frmr->map_len; - else - max_write = xprt->sc_max_sge * PAGE_SIZE; + max_write = xprt->sc_max_sge * PAGE_SIZE; /* Write chunks start at the pagelist */ for (xdr_off = rqstp->rq_res.head[0].iov_len, chunk_no = 0; @@ -471,10 +311,7 @@ static int send_reply_chunks(struct svcxprt_rdma *xprt, res_ary = (struct rpcrdma_write_array *) &rdma_resp->rm_body.rm_chunks[2]; - if (vec->frmr) - max_write = vec->frmr->map_len; - else - max_write = xprt->sc_max_sge * PAGE_SIZE; + max_write = xprt->sc_max_sge * PAGE_SIZE; /* xdr offset starts at RPC message */ nchunks = ntohl(arg_ary->wc_nchunks); @@ -544,7 +381,6 @@ static int send_reply(struct svcxprt_rdma *rdma, int byte_count) { struct ib_send_wr send_wr; - struct ib_send_wr inv_wr; int sge_no; int sge_bytes; int page_no; @@ -558,7 +394,6 @@ static int send_reply(struct svcxprt_rdma *rdma, "svcrdma: could not post a receive buffer, err=%d." "Closing transport %p.\n", ret, rdma); set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags); - svc_rdma_put_frmr(rdma, vec->frmr); svc_rdma_put_context(ctxt, 0); return -ENOTCONN; } @@ -566,11 +401,6 @@ static int send_reply(struct svcxprt_rdma *rdma, /* Prepare the context */ ctxt->pages[0] = page; ctxt->count = 1; - ctxt->frmr = vec->frmr; - if (vec->frmr) - set_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); - else - clear_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags); /* Prepare the SGE for the RPCRDMA Header */ ctxt->sge[0].lkey = rdma->sc_dma_lkey; @@ -589,21 +419,15 @@ static int send_reply(struct svcxprt_rdma *rdma, int xdr_off = 0; sge_bytes = min_t(size_t, vec->sge[sge_no].iov_len, byte_count); byte_count -= sge_bytes; - if (!vec->frmr) { - ctxt->sge[sge_no].addr = - dma_map_xdr(rdma, &rqstp->rq_res, xdr_off, - sge_bytes, DMA_TO_DEVICE); - xdr_off += sge_bytes; - if (ib_dma_mapping_error(rdma->sc_cm_id->device, - ctxt->sge[sge_no].addr)) - goto err; - atomic_inc(&rdma->sc_dma_used); - ctxt->sge[sge_no].lkey = rdma->sc_dma_lkey; - } else { - ctxt->sge[sge_no].addr = (unsigned long) - vec->sge[sge_no].iov_base; - ctxt->sge[sge_no].lkey = vec->frmr->mr->lkey; - } + ctxt->sge[sge_no].addr = + dma_map_xdr(rdma, &rqstp->rq_res, xdr_off, + sge_bytes, DMA_TO_DEVICE); + xdr_off += sge_bytes; + if (ib_dma_mapping_error(rdma->sc_cm_id->device, + ctxt->sge[sge_no].addr)) + goto err; + atomic_inc(&rdma->sc_dma_used); + ctxt->sge[sge_no].lkey = rdma->sc_dma_lkey; ctxt->sge[sge_no].length = sge_bytes; } BUG_ON(byte_count != 0); @@ -625,6 +449,8 @@ static int send_reply(struct svcxprt_rdma *rdma, if (page_no+1 >= sge_no) ctxt->sge[page_no+1].length = 0; } + rqstp->rq_next_page = rqstp->rq_respages + 1; + BUG_ON(sge_no > rdma->sc_max_sge); memset(&send_wr, 0, sizeof send_wr); ctxt->wr_op = IB_WR_SEND; @@ -633,15 +459,6 @@ static int send_reply(struct svcxprt_rdma *rdma, send_wr.num_sge = sge_no; send_wr.opcode = IB_WR_SEND; send_wr.send_flags = IB_SEND_SIGNALED; - if (vec->frmr) { - /* Prepare INVALIDATE WR */ - memset(&inv_wr, 0, sizeof inv_wr); - inv_wr.opcode = IB_WR_LOCAL_INV; - inv_wr.send_flags = IB_SEND_SIGNALED; - inv_wr.ex.invalidate_rkey = - vec->frmr->mr->lkey; - send_wr.next = &inv_wr; - } ret = svc_rdma_send(rdma, &send_wr); if (ret) @@ -651,7 +468,6 @@ static int send_reply(struct svcxprt_rdma *rdma, err: svc_rdma_unmap_dma(ctxt); - svc_rdma_put_frmr(rdma, vec->frmr); svc_rdma_put_context(ctxt, 1); return -EIO; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 62e4f9bcc38..e7323fbbd34 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -65,6 +66,7 @@ static void dto_tasklet_func(unsigned long data); static void svc_rdma_detach(struct svc_xprt *xprt); static void svc_rdma_free(struct svc_xprt *xprt); static int svc_rdma_has_wspace(struct svc_xprt *xprt); +static int svc_rdma_secure_port(struct svc_rqst *); static void rq_cq_reap(struct svcxprt_rdma *xprt); static void sq_cq_reap(struct svcxprt_rdma *xprt); @@ -82,6 +84,7 @@ static struct svc_xprt_ops svc_rdma_ops = { .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr, .xpo_has_wspace = svc_rdma_has_wspace, .xpo_accept = svc_rdma_accept, + .xpo_secure_port = svc_rdma_secure_port, }; struct svc_xprt_class svc_rdma_class = { @@ -160,7 +163,6 @@ struct svc_rdma_req_map *svc_rdma_get_req_map(void) schedule_timeout_uninterruptible(msecs_to_jiffies(500)); } map->count = 0; - map->frmr = NULL; return map; } @@ -336,22 +338,21 @@ static void process_context(struct svcxprt_rdma *xprt, switch (ctxt->wr_op) { case IB_WR_SEND: - if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags)) - svc_rdma_put_frmr(xprt, ctxt->frmr); + BUG_ON(ctxt->frmr); svc_rdma_put_context(ctxt, 1); break; case IB_WR_RDMA_WRITE: + BUG_ON(ctxt->frmr); svc_rdma_put_context(ctxt, 0); break; case IB_WR_RDMA_READ: case IB_WR_RDMA_READ_WITH_INV: + svc_rdma_put_frmr(xprt, ctxt->frmr); if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) { struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr; BUG_ON(!read_hdr); - if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags)) - svc_rdma_put_frmr(xprt, ctxt->frmr); spin_lock_bh(&xprt->sc_rq_dto_lock); set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); list_add_tail(&read_hdr->dto_q, @@ -363,6 +364,7 @@ static void process_context(struct svcxprt_rdma *xprt, break; default: + BUG_ON(1); printk(KERN_ERR "svcrdma: unexpected completion type, " "opcode=%d\n", ctxt->wr_op); @@ -378,29 +380,42 @@ static void process_context(struct svcxprt_rdma *xprt, static void sq_cq_reap(struct svcxprt_rdma *xprt) { struct svc_rdma_op_ctxt *ctxt = NULL; - struct ib_wc wc; + struct ib_wc wc_a[6]; + struct ib_wc *wc; struct ib_cq *cq = xprt->sc_sq_cq; int ret; + memset(wc_a, 0, sizeof(wc_a)); + if (!test_and_clear_bit(RDMAXPRT_SQ_PENDING, &xprt->sc_flags)) return; ib_req_notify_cq(xprt->sc_sq_cq, IB_CQ_NEXT_COMP); atomic_inc(&rdma_stat_sq_poll); - while ((ret = ib_poll_cq(cq, 1, &wc)) > 0) { - if (wc.status != IB_WC_SUCCESS) - /* Close the transport */ - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + while ((ret = ib_poll_cq(cq, ARRAY_SIZE(wc_a), wc_a)) > 0) { + int i; - /* Decrement used SQ WR count */ - atomic_dec(&xprt->sc_sq_count); - wake_up(&xprt->sc_send_wait); + for (i = 0; i < ret; i++) { + wc = &wc_a[i]; + if (wc->status != IB_WC_SUCCESS) { + dprintk("svcrdma: sq wc err status %d\n", + wc->status); - ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id; - if (ctxt) - process_context(xprt, ctxt); + /* Close the transport */ + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + } - svc_xprt_put(&xprt->sc_xprt); + /* Decrement used SQ WR count */ + atomic_dec(&xprt->sc_sq_count); + wake_up(&xprt->sc_send_wait); + + ctxt = (struct svc_rdma_op_ctxt *) + (unsigned long)wc->wr_id; + if (ctxt) + process_context(xprt, ctxt); + + svc_xprt_put(&xprt->sc_xprt); + } } if (ctxt) @@ -477,8 +492,7 @@ struct page *svc_rdma_get_page(void) while ((page = alloc_page(GFP_KERNEL)) == NULL) { /* If we can't get memory, wait a bit and try again */ - printk(KERN_INFO "svcrdma: out of memory...retrying in 1000 " - "jiffies.\n"); + printk(KERN_INFO "svcrdma: out of memory...retrying in 1s\n"); schedule_timeout_uninterruptible(msecs_to_jiffies(1000)); } return page; @@ -994,7 +1008,11 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) need_dma_mr = 0; break; case RDMA_TRANSPORT_IB: - if (!(devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) { + if (!(newxprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG)) { + need_dma_mr = 1; + dma_mr_acc = IB_ACCESS_LOCAL_WRITE; + } else if (!(devattr.device_cap_flags & + IB_DEVICE_LOCAL_DMA_LKEY)) { need_dma_mr = 1; dma_mr_acc = IB_ACCESS_LOCAL_WRITE; } else @@ -1191,14 +1209,7 @@ static int svc_rdma_has_wspace(struct svc_xprt *xprt) container_of(xprt, struct svcxprt_rdma, sc_xprt); /* - * If there are fewer SQ WR available than required to send a - * simple response, return false. - */ - if ((rdma->sc_sq_depth - atomic_read(&rdma->sc_sq_count) < 3)) - return 0; - - /* - * ...or there are already waiters on the SQ, + * If there are already waiters on the SQ, * return false. */ if (waitqueue_active(&rdma->sc_send_wait)) @@ -1208,6 +1219,11 @@ static int svc_rdma_has_wspace(struct svc_xprt *xprt) return 1; } +static int svc_rdma_secure_port(struct svc_rqst *rqstp) +{ + return 1; +} + /* * Attempt to register the kvec representing the RPC memory with the * device. diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 285dc088411..66f91f0d071 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -149,6 +149,11 @@ static struct ctl_table sunrpc_table[] = { #endif +#define RPCRDMA_BIND_TO (60U * HZ) +#define RPCRDMA_INIT_REEST_TO (5U * HZ) +#define RPCRDMA_MAX_REEST_TO (30U * HZ) +#define RPCRDMA_IDLE_DISC_TO (5U * 60 * HZ) + static struct rpc_xprt_ops xprt_rdma_procs; /* forward reference */ static void @@ -229,7 +234,6 @@ static void xprt_rdma_destroy(struct rpc_xprt *xprt) { struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); - int rc; dprintk("RPC: %s: called\n", __func__); @@ -238,10 +242,7 @@ xprt_rdma_destroy(struct rpc_xprt *xprt) xprt_clear_connected(xprt); rpcrdma_buffer_destroy(&r_xprt->rx_buf); - rc = rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia); - if (rc) - dprintk("RPC: %s: rpcrdma_ep_destroy returned %i\n", - __func__, rc); + rpcrdma_ep_destroy(&r_xprt->rx_ep, &r_xprt->rx_ia); rpcrdma_ia_close(&r_xprt->rx_ia); xprt_rdma_free_addresses(xprt); @@ -289,9 +290,9 @@ xprt_setup_rdma(struct xprt_create *args) /* 60 second timeout, no retries */ xprt->timeout = &xprt_rdma_default_timeout; - xprt->bind_timeout = (60U * HZ); - xprt->reestablish_timeout = (5U * HZ); - xprt->idle_timeout = (5U * 60 * HZ); + xprt->bind_timeout = RPCRDMA_BIND_TO; + xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; + xprt->idle_timeout = RPCRDMA_IDLE_DISC_TO; xprt->resvport = 0; /* privileged port not needed */ xprt->tsh_size = 0; /* RPC-RDMA handles framing */ @@ -391,7 +392,7 @@ out4: xprt_rdma_free_addresses(xprt); rc = -EINVAL; out3: - (void) rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia); + rpcrdma_ep_destroy(new_ep, &new_xprt->rx_ia); out2: rpcrdma_ia_close(&new_xprt->rx_ia); out1: @@ -436,10 +437,10 @@ xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) schedule_delayed_work(&r_xprt->rdma_connect, xprt->reestablish_timeout); xprt->reestablish_timeout <<= 1; - if (xprt->reestablish_timeout > (30 * HZ)) - xprt->reestablish_timeout = (30 * HZ); - else if (xprt->reestablish_timeout < (5 * HZ)) - xprt->reestablish_timeout = (5 * HZ); + if (xprt->reestablish_timeout > RPCRDMA_MAX_REEST_TO) + xprt->reestablish_timeout = RPCRDMA_MAX_REEST_TO; + else if (xprt->reestablish_timeout < RPCRDMA_INIT_REEST_TO) + xprt->reestablish_timeout = RPCRDMA_INIT_REEST_TO; } else { schedule_delayed_work(&r_xprt->rdma_connect, 0); if (!RPC_IS_ASYNC(task)) @@ -447,23 +448,6 @@ xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) } } -static int -xprt_rdma_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task) -{ - struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); - int credits = atomic_read(&r_xprt->rx_buf.rb_credits); - - /* == RPC_CWNDSCALE @ init, but *after* setup */ - if (r_xprt->rx_buf.rb_cwndscale == 0UL) { - r_xprt->rx_buf.rb_cwndscale = xprt->cwnd; - dprintk("RPC: %s: cwndscale %lu\n", __func__, - r_xprt->rx_buf.rb_cwndscale); - BUG_ON(r_xprt->rx_buf.rb_cwndscale <= 0); - } - xprt->cwnd = credits * r_xprt->rx_buf.rb_cwndscale; - return xprt_reserve_xprt_cong(xprt, task); -} - /* * The RDMA allocate/free functions need the task structure as a place * to hide the struct rpcrdma_req, which is necessary for the actual send/recv @@ -479,7 +463,8 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size) struct rpcrdma_req *req, *nreq; req = rpcrdma_buffer_get(&rpcx_to_rdmax(xprt)->rx_buf); - BUG_ON(NULL == req); + if (req == NULL) + return NULL; if (size > req->rl_size) { dprintk("RPC: %s: size %zd too large for buffer[%zd]: " @@ -503,18 +488,6 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size) * If the allocation or registration fails, the RPC framework * will (doggedly) retry. */ - if (rpcx_to_rdmax(xprt)->rx_ia.ri_memreg_strategy == - RPCRDMA_BOUNCEBUFFERS) { - /* forced to "pure inline" */ - dprintk("RPC: %s: too much data (%zd) for inline " - "(r/w max %d/%d)\n", __func__, size, - rpcx_to_rdmad(xprt).inline_rsize, - rpcx_to_rdmad(xprt).inline_wsize); - size = req->rl_size; - rpc_exit(task, -EIO); /* fail the operation */ - rpcx_to_rdmax(xprt)->rx_stats.failed_marshal_count++; - goto out; - } if (task->tk_flags & RPC_TASK_SWAPPER) nreq = kmalloc(sizeof *req + size, GFP_ATOMIC); else @@ -543,7 +516,6 @@ xprt_rdma_allocate(struct rpc_task *task, size_t size) req = nreq; } dprintk("RPC: %s: size %zd, request 0x%p\n", __func__, size, req); -out: req->rl_connect_cookie = 0; /* our reserved value */ return req->rl_xdr_buf; @@ -579,9 +551,7 @@ xprt_rdma_free(void *buffer) __func__, rep, (rep && rep->rr_func) ? " (with waiter)" : ""); /* - * Finish the deregistration. When using mw bind, this was - * begun in rpcrdma_reply_handler(). In all other modes, we - * do it here, in thread context. The process is considered + * Finish the deregistration. The process is considered * complete when the rr_func vector becomes NULL - this * was put in place during rpcrdma_reply_handler() - the wait * call below will not block if the dereg is "done". If @@ -590,12 +560,7 @@ xprt_rdma_free(void *buffer) for (i = 0; req->rl_nchunks;) { --req->rl_nchunks; i += rpcrdma_deregister_external( - &req->rl_segments[i], r_xprt, NULL); - } - - if (rep && wait_event_interruptible(rep->rr_unbind, !rep->rr_func)) { - rep->rr_func = NULL; /* abandon the callback */ - req->rl_reply = NULL; + &req->rl_segments[i], r_xprt); } if (req->rl_iov.length == 0) { /* see allocate above */ @@ -630,13 +595,12 @@ xprt_rdma_send_request(struct rpc_task *task) struct rpc_xprt *xprt = rqst->rq_xprt; struct rpcrdma_req *req = rpcr_to_rdmar(rqst); struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(xprt); + int rc; - /* marshal the send itself */ - if (req->rl_niovs == 0 && rpcrdma_marshal_req(rqst) != 0) { - r_xprt->rx_stats.failed_marshal_count++; - dprintk("RPC: %s: rpcrdma_marshal_req failed\n", - __func__); - return -EIO; + if (req->rl_niovs == 0) { + rc = rpcrdma_marshal_req(rqst); + if (rc < 0) + goto failed_marshal; } if (req->rl_reply == NULL) /* e.g. reconnection */ @@ -660,6 +624,12 @@ xprt_rdma_send_request(struct rpc_task *task) rqst->rq_bytes_sent = 0; return 0; +failed_marshal: + r_xprt->rx_stats.failed_marshal_count++; + dprintk("RPC: %s: rpcrdma_marshal_req failed, status %i\n", + __func__, rc); + if (rc == -EIO) + return -EIO; drop_connection: xprt_disconnect_done(xprt); return -ENOTCONN; /* implies disconnect */ @@ -705,7 +675,7 @@ static void xprt_rdma_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) */ static struct rpc_xprt_ops xprt_rdma_procs = { - .reserve_xprt = xprt_rdma_reserve_xprt, + .reserve_xprt = xprt_reserve_xprt_cong, .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */ .alloc_slot = xprt_alloc_slot, .release_request = xprt_release_rqst_cong, /* ditto */ @@ -733,7 +703,7 @@ static void __exit xprt_rdma_cleanup(void) { int rc; - dprintk(KERN_INFO "RPCRDMA Module Removed, deregister RPC RDMA transport\n"); + dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n"); #ifdef RPC_DEBUG if (sunrpc_table_header) { unregister_sysctl_table(sunrpc_table_header); @@ -755,14 +725,14 @@ static int __init xprt_rdma_init(void) if (rc) return rc; - dprintk(KERN_INFO "RPCRDMA Module Init, register RPC RDMA transport\n"); + dprintk("RPCRDMA Module Init, register RPC RDMA transport\n"); - dprintk(KERN_INFO "Defaults:\n"); - dprintk(KERN_INFO "\tSlots %d\n" + dprintk("Defaults:\n"); + dprintk("\tSlots %d\n" "\tMaxInlineRead %d\n\tMaxInlineWrite %d\n", xprt_rdma_slot_table_entries, xprt_rdma_max_inline_read, xprt_rdma_max_inline_write); - dprintk(KERN_INFO "\tPadding %d\n\tMemreg %d\n", + dprintk("\tPadding %d\n\tMemreg %d\n", xprt_rdma_inline_write_padding, xprt_rdma_memreg_strategy); #ifdef RPC_DEBUG diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 93726560eaa..13dbd1c389f 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -48,8 +48,8 @@ */ #include <linux/interrupt.h> -#include <linux/pci.h> /* for Tavor hack below */ #include <linux/slab.h> +#include <asm/bitops.h> #include "xprt_rdma.h" @@ -142,98 +142,139 @@ rpcrdma_cq_async_error_upcall(struct ib_event *event, void *context) } } -static inline -void rpcrdma_event_process(struct ib_wc *wc) +static void +rpcrdma_sendcq_process_wc(struct ib_wc *wc) { - struct rpcrdma_mw *frmr; - struct rpcrdma_rep *rep = - (struct rpcrdma_rep *)(unsigned long) wc->wr_id; + struct rpcrdma_mw *frmr = (struct rpcrdma_mw *)(unsigned long)wc->wr_id; - dprintk("RPC: %s: event rep %p status %X opcode %X length %u\n", - __func__, rep, wc->status, wc->opcode, wc->byte_len); + dprintk("RPC: %s: frmr %p status %X opcode %d\n", + __func__, frmr, wc->status, wc->opcode); - if (!rep) /* send or bind completion that we don't care about */ + if (wc->wr_id == 0ULL) return; - - if (IB_WC_SUCCESS != wc->status) { - dprintk("RPC: %s: WC opcode %d status %X, connection lost\n", - __func__, wc->opcode, wc->status); - rep->rr_len = ~0U; - if (wc->opcode != IB_WC_FAST_REG_MR && wc->opcode != IB_WC_LOCAL_INV) - rpcrdma_schedule_tasklet(rep); + if (wc->status != IB_WC_SUCCESS) return; - } - switch (wc->opcode) { - case IB_WC_FAST_REG_MR: - frmr = (struct rpcrdma_mw *)(unsigned long)wc->wr_id; + if (wc->opcode == IB_WC_FAST_REG_MR) frmr->r.frmr.state = FRMR_IS_VALID; - break; - case IB_WC_LOCAL_INV: - frmr = (struct rpcrdma_mw *)(unsigned long)wc->wr_id; + else if (wc->opcode == IB_WC_LOCAL_INV) frmr->r.frmr.state = FRMR_IS_INVALID; - break; - case IB_WC_RECV: - rep->rr_len = wc->byte_len; - ib_dma_sync_single_for_cpu( - rdmab_to_ia(rep->rr_buffer)->ri_id->device, - rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); - /* Keep (only) the most recent credits, after check validity */ - if (rep->rr_len >= 16) { - struct rpcrdma_msg *p = - (struct rpcrdma_msg *) rep->rr_base; - unsigned int credits = ntohl(p->rm_credit); - if (credits == 0) { - dprintk("RPC: %s: server" - " dropped credits to 0!\n", __func__); - /* don't deadlock */ - credits = 1; - } else if (credits > rep->rr_buffer->rb_max_requests) { - dprintk("RPC: %s: server" - " over-crediting: %d (%d)\n", - __func__, credits, - rep->rr_buffer->rb_max_requests); - credits = rep->rr_buffer->rb_max_requests; - } - atomic_set(&rep->rr_buffer->rb_credits, credits); - } - /* fall through */ - case IB_WC_BIND_MW: - rpcrdma_schedule_tasklet(rep); - break; - default: - dprintk("RPC: %s: unexpected WC event %X\n", - __func__, wc->opcode); - break; - } } -static inline int -rpcrdma_cq_poll(struct ib_cq *cq) +static int +rpcrdma_sendcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep) { - struct ib_wc wc; - int rc; + struct ib_wc *wcs; + int budget, count, rc; - for (;;) { - rc = ib_poll_cq(cq, 1, &wc); - if (rc < 0) { - dprintk("RPC: %s: ib_poll_cq failed %i\n", - __func__, rc); + budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE; + do { + wcs = ep->rep_send_wcs; + + rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs); + if (rc <= 0) return rc; - } - if (rc == 0) - break; - rpcrdma_event_process(&wc); + count = rc; + while (count-- > 0) + rpcrdma_sendcq_process_wc(wcs++); + } while (rc == RPCRDMA_POLLSIZE && --budget); + return 0; +} + +/* + * Handle send, fast_reg_mr, and local_inv completions. + * + * Send events are typically suppressed and thus do not result + * in an upcall. Occasionally one is signaled, however. This + * prevents the provider's completion queue from wrapping and + * losing a completion. + */ +static void +rpcrdma_sendcq_upcall(struct ib_cq *cq, void *cq_context) +{ + struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context; + int rc; + + rc = rpcrdma_sendcq_poll(cq, ep); + if (rc) { + dprintk("RPC: %s: ib_poll_cq failed: %i\n", + __func__, rc); + return; } + rc = ib_req_notify_cq(cq, + IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); + if (rc == 0) + return; + if (rc < 0) { + dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", + __func__, rc); + return; + } + + rpcrdma_sendcq_poll(cq, ep); +} + +static void +rpcrdma_recvcq_process_wc(struct ib_wc *wc) +{ + struct rpcrdma_rep *rep = + (struct rpcrdma_rep *)(unsigned long)wc->wr_id; + + dprintk("RPC: %s: rep %p status %X opcode %X length %u\n", + __func__, rep, wc->status, wc->opcode, wc->byte_len); + + if (wc->status != IB_WC_SUCCESS) { + rep->rr_len = ~0U; + goto out_schedule; + } + if (wc->opcode != IB_WC_RECV) + return; + + rep->rr_len = wc->byte_len; + ib_dma_sync_single_for_cpu(rdmab_to_ia(rep->rr_buffer)->ri_id->device, + rep->rr_iov.addr, rep->rr_len, DMA_FROM_DEVICE); + + if (rep->rr_len >= 16) { + struct rpcrdma_msg *p = (struct rpcrdma_msg *)rep->rr_base; + unsigned int credits = ntohl(p->rm_credit); + + if (credits == 0) + credits = 1; /* don't deadlock */ + else if (credits > rep->rr_buffer->rb_max_requests) + credits = rep->rr_buffer->rb_max_requests; + atomic_set(&rep->rr_buffer->rb_credits, credits); + } + +out_schedule: + rpcrdma_schedule_tasklet(rep); +} + +static int +rpcrdma_recvcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep) +{ + struct ib_wc *wcs; + int budget, count, rc; + + budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE; + do { + wcs = ep->rep_recv_wcs; + + rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs); + if (rc <= 0) + return rc; + + count = rc; + while (count-- > 0) + rpcrdma_recvcq_process_wc(wcs++); + } while (rc == RPCRDMA_POLLSIZE && --budget); return 0; } /* - * rpcrdma_cq_event_upcall + * Handle receive completions. * - * This upcall handles recv, send, bind and unbind events. * It is reentrant but processes single events in order to maintain * ordering of receives to keep server credits. * @@ -242,26 +283,31 @@ rpcrdma_cq_poll(struct ib_cq *cq) * connection shutdown. That is, the structures required for * the completion of the reply handler must remain intact until * all memory has been reclaimed. - * - * Note that send events are suppressed and do not result in an upcall. */ static void -rpcrdma_cq_event_upcall(struct ib_cq *cq, void *context) +rpcrdma_recvcq_upcall(struct ib_cq *cq, void *cq_context) { + struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context; int rc; - rc = rpcrdma_cq_poll(cq); - if (rc) + rc = rpcrdma_recvcq_poll(cq, ep); + if (rc) { + dprintk("RPC: %s: ib_poll_cq failed: %i\n", + __func__, rc); return; + } - rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); - if (rc) { - dprintk("RPC: %s: ib_req_notify_cq failed %i\n", + rc = ib_req_notify_cq(cq, + IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS); + if (rc == 0) + return; + if (rc < 0) { + dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", __func__, rc); return; } - rpcrdma_cq_poll(cq); + rpcrdma_recvcq_poll(cq, ep); } #ifdef RPC_DEBUG @@ -493,54 +539,32 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey; } - switch (memreg) { - case RPCRDMA_MEMWINDOWS: - case RPCRDMA_MEMWINDOWS_ASYNC: - if (!(devattr.device_cap_flags & IB_DEVICE_MEM_WINDOW)) { - dprintk("RPC: %s: MEMWINDOWS registration " - "specified but not supported by adapter, " - "using slower RPCRDMA_REGISTER\n", - __func__); - memreg = RPCRDMA_REGISTER; - } - break; - case RPCRDMA_MTHCAFMR: - if (!ia->ri_id->device->alloc_fmr) { -#if RPCRDMA_PERSISTENT_REGISTRATION - dprintk("RPC: %s: MTHCAFMR registration " - "specified but not supported by adapter, " - "using riskier RPCRDMA_ALLPHYSICAL\n", - __func__); - memreg = RPCRDMA_ALLPHYSICAL; -#else - dprintk("RPC: %s: MTHCAFMR registration " - "specified but not supported by adapter, " - "using slower RPCRDMA_REGISTER\n", - __func__); - memreg = RPCRDMA_REGISTER; -#endif - } - break; - case RPCRDMA_FRMR: + if (memreg == RPCRDMA_FRMR) { /* Requires both frmr reg and local dma lkey */ if ((devattr.device_cap_flags & (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) != (IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) { -#if RPCRDMA_PERSISTENT_REGISTRATION dprintk("RPC: %s: FRMR registration " - "specified but not supported by adapter, " - "using riskier RPCRDMA_ALLPHYSICAL\n", - __func__); + "not supported by HCA\n", __func__); + memreg = RPCRDMA_MTHCAFMR; + } else { + /* Mind the ia limit on FRMR page list depth */ + ia->ri_max_frmr_depth = min_t(unsigned int, + RPCRDMA_MAX_DATA_SEGS, + devattr.max_fast_reg_page_list_len); + } + } + if (memreg == RPCRDMA_MTHCAFMR) { + if (!ia->ri_id->device->alloc_fmr) { + dprintk("RPC: %s: MTHCAFMR registration " + "not supported by HCA\n", __func__); +#if RPCRDMA_PERSISTENT_REGISTRATION memreg = RPCRDMA_ALLPHYSICAL; #else - dprintk("RPC: %s: FRMR registration " - "specified but not supported by adapter, " - "using slower RPCRDMA_REGISTER\n", - __func__); - memreg = RPCRDMA_REGISTER; + rc = -ENOMEM; + goto out2; #endif } - break; } /* @@ -552,8 +576,6 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) * adapter. */ switch (memreg) { - case RPCRDMA_BOUNCEBUFFERS: - case RPCRDMA_REGISTER: case RPCRDMA_FRMR: break; #if RPCRDMA_PERSISTENT_REGISTRATION @@ -563,30 +585,26 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) IB_ACCESS_REMOTE_READ; goto register_setup; #endif - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - mem_priv = IB_ACCESS_LOCAL_WRITE | - IB_ACCESS_MW_BIND; - goto register_setup; case RPCRDMA_MTHCAFMR: if (ia->ri_have_dma_lkey) break; mem_priv = IB_ACCESS_LOCAL_WRITE; +#if RPCRDMA_PERSISTENT_REGISTRATION register_setup: +#endif ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv); if (IS_ERR(ia->ri_bind_mem)) { printk(KERN_ALERT "%s: ib_get_dma_mr for " - "phys register failed with %lX\n\t" - "Will continue with degraded performance\n", + "phys register failed with %lX\n", __func__, PTR_ERR(ia->ri_bind_mem)); - memreg = RPCRDMA_REGISTER; - ia->ri_bind_mem = NULL; + rc = -ENOMEM; + goto out2; } break; default: - printk(KERN_ERR "%s: invalid memory registration mode %d\n", - __func__, memreg); - rc = -EINVAL; + printk(KERN_ERR "RPC: Unsupported memory " + "registration mode: %d\n", memreg); + rc = -ENOMEM; goto out2; } dprintk("RPC: %s: memory registration strategy is %d\n", @@ -640,6 +658,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata) { struct ib_device_attr devattr; + struct ib_cq *sendcq, *recvcq; int rc, err; rc = ib_query_device(ia->ri_id->device, &devattr); @@ -659,32 +678,42 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, ep->rep_attr.srq = NULL; ep->rep_attr.cap.max_send_wr = cdata->max_requests; switch (ia->ri_memreg_strategy) { - case RPCRDMA_FRMR: + case RPCRDMA_FRMR: { + int depth = 7; + /* Add room for frmr register and invalidate WRs. * 1. FRMR reg WR for head * 2. FRMR invalidate WR for head - * 3. FRMR reg WR for pagelist - * 4. FRMR invalidate WR for pagelist + * 3. N FRMR reg WRs for pagelist + * 4. N FRMR invalidate WRs for pagelist * 5. FRMR reg WR for tail * 6. FRMR invalidate WR for tail * 7. The RDMA_SEND WR */ - ep->rep_attr.cap.max_send_wr *= 7; + + /* Calculate N if the device max FRMR depth is smaller than + * RPCRDMA_MAX_DATA_SEGS. + */ + if (ia->ri_max_frmr_depth < RPCRDMA_MAX_DATA_SEGS) { + int delta = RPCRDMA_MAX_DATA_SEGS - + ia->ri_max_frmr_depth; + + do { + depth += 2; /* FRMR reg + invalidate */ + delta -= ia->ri_max_frmr_depth; + } while (delta > 0); + + } + ep->rep_attr.cap.max_send_wr *= depth; if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) { - cdata->max_requests = devattr.max_qp_wr / 7; + cdata->max_requests = devattr.max_qp_wr / depth; if (!cdata->max_requests) return -EINVAL; - ep->rep_attr.cap.max_send_wr = cdata->max_requests * 7; + ep->rep_attr.cap.max_send_wr = cdata->max_requests * + depth; } break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - /* Add room for mw_binds+unbinds - overkill! */ - ep->rep_attr.cap.max_send_wr++; - ep->rep_attr.cap.max_send_wr *= (2 * RPCRDMA_MAX_SEGS); - if (ep->rep_attr.cap.max_send_wr > devattr.max_qp_wr) - return -EINVAL; - break; + } default: break; } @@ -705,46 +734,51 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, ep->rep_attr.cap.max_recv_sge); /* set trigger for requesting send completion */ - ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 /* - 1*/; - switch (ia->ri_memreg_strategy) { - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - ep->rep_cqinit -= RPCRDMA_MAX_SEGS; - break; - default: - break; - } + ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1; if (ep->rep_cqinit <= 2) ep->rep_cqinit = 0; INIT_CQCOUNT(ep); ep->rep_ia = ia; init_waitqueue_head(&ep->rep_connect_wait); + INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker); - /* - * Create a single cq for receive dto and mw_bind (only ever - * care about unbind, really). Send completions are suppressed. - * Use single threaded tasklet upcalls to maintain ordering. - */ - ep->rep_cq = ib_create_cq(ia->ri_id->device, rpcrdma_cq_event_upcall, - rpcrdma_cq_async_error_upcall, NULL, - ep->rep_attr.cap.max_recv_wr + + sendcq = ib_create_cq(ia->ri_id->device, rpcrdma_sendcq_upcall, + rpcrdma_cq_async_error_upcall, ep, ep->rep_attr.cap.max_send_wr + 1, 0); - if (IS_ERR(ep->rep_cq)) { - rc = PTR_ERR(ep->rep_cq); - dprintk("RPC: %s: ib_create_cq failed: %i\n", + if (IS_ERR(sendcq)) { + rc = PTR_ERR(sendcq); + dprintk("RPC: %s: failed to create send CQ: %i\n", __func__, rc); goto out1; } - rc = ib_req_notify_cq(ep->rep_cq, IB_CQ_NEXT_COMP); + rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP); + if (rc) { + dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", + __func__, rc); + goto out2; + } + + recvcq = ib_create_cq(ia->ri_id->device, rpcrdma_recvcq_upcall, + rpcrdma_cq_async_error_upcall, ep, + ep->rep_attr.cap.max_recv_wr + 1, 0); + if (IS_ERR(recvcq)) { + rc = PTR_ERR(recvcq); + dprintk("RPC: %s: failed to create recv CQ: %i\n", + __func__, rc); + goto out2; + } + + rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP); if (rc) { dprintk("RPC: %s: ib_req_notify_cq failed: %i\n", __func__, rc); + ib_destroy_cq(recvcq); goto out2; } - ep->rep_attr.send_cq = ep->rep_cq; - ep->rep_attr.recv_cq = ep->rep_cq; + ep->rep_attr.send_cq = sendcq; + ep->rep_attr.recv_cq = recvcq; /* Initialize cma parameters */ @@ -754,9 +788,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, /* Client offers RDMA Read but does not initiate */ ep->rep_remote_cma.initiator_depth = 0; - if (ia->ri_memreg_strategy == RPCRDMA_BOUNCEBUFFERS) - ep->rep_remote_cma.responder_resources = 0; - else if (devattr.max_qp_rd_atom > 32) /* arbitrary but <= 255 */ + if (devattr.max_qp_rd_atom > 32) /* arbitrary but <= 255 */ ep->rep_remote_cma.responder_resources = 32; else ep->rep_remote_cma.responder_resources = devattr.max_qp_rd_atom; @@ -768,7 +800,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, return 0; out2: - err = ib_destroy_cq(ep->rep_cq); + err = ib_destroy_cq(sendcq); if (err) dprintk("RPC: %s: ib_destroy_cq returned %i\n", __func__, err); @@ -782,11 +814,8 @@ out1: * Disconnect and destroy endpoint. After this, the only * valid operations on the ep are to free it (if dynamically * allocated) or re-create it. - * - * The caller's error handling must be sure to not leak the endpoint - * if this function fails. */ -int +void rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) { int rc; @@ -794,6 +823,8 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) dprintk("RPC: %s: entering, connected is %d\n", __func__, ep->rep_connected); + cancel_delayed_work_sync(&ep->rep_connect_worker); + if (ia->ri_id->qp) { rc = rpcrdma_ep_disconnect(ep, ia); if (rc) @@ -809,13 +840,17 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) ep->rep_pad_mr = NULL; } - rpcrdma_clean_cq(ep->rep_cq); - rc = ib_destroy_cq(ep->rep_cq); + rpcrdma_clean_cq(ep->rep_attr.recv_cq); + rc = ib_destroy_cq(ep->rep_attr.recv_cq); if (rc) dprintk("RPC: %s: ib_destroy_cq returned %i\n", __func__, rc); - return rc; + rpcrdma_clean_cq(ep->rep_attr.send_cq); + rc = ib_destroy_cq(ep->rep_attr.send_cq); + if (rc) + dprintk("RPC: %s: ib_destroy_cq returned %i\n", + __func__, rc); } /* @@ -831,17 +866,20 @@ rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) if (ep->rep_connected != 0) { struct rpcrdma_xprt *xprt; retry: + dprintk("RPC: %s: reconnecting...\n", __func__); rc = rpcrdma_ep_disconnect(ep, ia); if (rc && rc != -ENOTCONN) dprintk("RPC: %s: rpcrdma_ep_disconnect" " status %i\n", __func__, rc); - rpcrdma_clean_cq(ep->rep_cq); + + rpcrdma_clean_cq(ep->rep_attr.recv_cq); + rpcrdma_clean_cq(ep->rep_attr.send_cq); xprt = container_of(ia, struct rpcrdma_xprt, rx_ia); id = rpcrdma_create_id(xprt, ia, (struct sockaddr *)&xprt->rx_data.addr); if (IS_ERR(id)) { - rc = PTR_ERR(id); + rc = -EHOSTUNREACH; goto out; } /* TEMP TEMP TEMP - fail if new device: @@ -855,35 +893,32 @@ retry: printk("RPC: %s: can't reconnect on " "different device!\n", __func__); rdma_destroy_id(id); - rc = -ENETDOWN; + rc = -ENETUNREACH; goto out; } /* END TEMP */ + rc = rdma_create_qp(id, ia->ri_pd, &ep->rep_attr); + if (rc) { + dprintk("RPC: %s: rdma_create_qp failed %i\n", + __func__, rc); + rdma_destroy_id(id); + rc = -ENETUNREACH; + goto out; + } rdma_destroy_qp(ia->ri_id); rdma_destroy_id(ia->ri_id); ia->ri_id = id; + } else { + dprintk("RPC: %s: connecting...\n", __func__); + rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); + if (rc) { + dprintk("RPC: %s: rdma_create_qp failed %i\n", + __func__, rc); + /* do not update ep->rep_connected */ + return -ENETUNREACH; + } } - rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr); - if (rc) { - dprintk("RPC: %s: rdma_create_qp failed %i\n", - __func__, rc); - goto out; - } - -/* XXX Tavor device performs badly with 2K MTU! */ -if (strnicmp(ia->ri_id->device->dma_device->bus->name, "pci", 3) == 0) { - struct pci_dev *pcid = to_pci_dev(ia->ri_id->device->dma_device); - if (pcid->device == PCI_DEVICE_ID_MELLANOX_TAVOR && - (pcid->vendor == PCI_VENDOR_ID_MELLANOX || - pcid->vendor == PCI_VENDOR_ID_TOPSPIN)) { - struct ib_qp_attr attr = { - .path_mtu = IB_MTU_1024 - }; - rc = ib_modify_qp(ia->ri_id->qp, &attr, IB_QP_PATH_MTU); - } -} - ep->rep_connected = 0; rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma); @@ -944,7 +979,8 @@ rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) { int rc; - rpcrdma_clean_cq(ep->rep_cq); + rpcrdma_clean_cq(ep->rep_attr.recv_cq); + rpcrdma_clean_cq(ep->rep_attr.send_cq); rc = rdma_disconnect(ia->ri_id); if (!rc) { /* returns without wait if not connected */ @@ -967,7 +1003,7 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, struct rpcrdma_create_data_internal *cdata) { char *p; - size_t len; + size_t len, rlen, wlen; int i, rc; struct rpcrdma_mw *r; @@ -997,11 +1033,6 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * sizeof(struct rpcrdma_mw); break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - len += (buf->rb_max_requests + 1) * RPCRDMA_MAX_SEGS * - sizeof(struct rpcrdma_mw); - break; default: break; } @@ -1032,32 +1063,29 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, } p += cdata->padding; - /* - * Allocate the fmr's, or mw's for mw_bind chunk registration. - * We "cycle" the mw's in order to minimize rkey reuse, - * and also reduce unbind-to-bind collision. - */ INIT_LIST_HEAD(&buf->rb_mws); r = (struct rpcrdma_mw *)p; switch (ia->ri_memreg_strategy) { case RPCRDMA_FRMR: for (i = buf->rb_max_requests * RPCRDMA_MAX_SEGS; i; i--) { r->r.frmr.fr_mr = ib_alloc_fast_reg_mr(ia->ri_pd, - RPCRDMA_MAX_SEGS); + ia->ri_max_frmr_depth); if (IS_ERR(r->r.frmr.fr_mr)) { rc = PTR_ERR(r->r.frmr.fr_mr); dprintk("RPC: %s: ib_alloc_fast_reg_mr" " failed %i\n", __func__, rc); goto out; } - r->r.frmr.fr_pgl = - ib_alloc_fast_reg_page_list(ia->ri_id->device, - RPCRDMA_MAX_SEGS); + r->r.frmr.fr_pgl = ib_alloc_fast_reg_page_list( + ia->ri_id->device, + ia->ri_max_frmr_depth); if (IS_ERR(r->r.frmr.fr_pgl)) { rc = PTR_ERR(r->r.frmr.fr_pgl); dprintk("RPC: %s: " "ib_alloc_fast_reg_page_list " "failed %i\n", __func__, rc); + + ib_dereg_mr(r->r.frmr.fr_mr); goto out; } list_add(&r->mw_list, &buf->rb_mws); @@ -1082,21 +1110,6 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, ++r; } break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - /* Allocate one extra request's worth, for full cycling */ - for (i = (buf->rb_max_requests+1) * RPCRDMA_MAX_SEGS; i; i--) { - r->r.mw = ib_alloc_mw(ia->ri_pd, IB_MW_TYPE_1); - if (IS_ERR(r->r.mw)) { - rc = PTR_ERR(r->r.mw); - dprintk("RPC: %s: ib_alloc_mw" - " failed %i\n", __func__, rc); - goto out; - } - list_add(&r->mw_list, &buf->rb_mws); - ++r; - } - break; default: break; } @@ -1105,16 +1118,16 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, * Allocate/init the request/reply buffers. Doing this * using kmalloc for now -- one for each buf. */ + wlen = 1 << fls(cdata->inline_wsize + sizeof(struct rpcrdma_req)); + rlen = 1 << fls(cdata->inline_rsize + sizeof(struct rpcrdma_rep)); + dprintk("RPC: %s: wlen = %zu, rlen = %zu\n", + __func__, wlen, rlen); + for (i = 0; i < buf->rb_max_requests; i++) { struct rpcrdma_req *req; struct rpcrdma_rep *rep; - len = cdata->inline_wsize + sizeof(struct rpcrdma_req); - /* RPC layer requests *double* size + 1K RPC_SLACK_SPACE! */ - /* Typical ~2400b, so rounding up saves work later */ - if (len < 4096) - len = 4096; - req = kmalloc(len, GFP_KERNEL); + req = kmalloc(wlen, GFP_KERNEL); if (req == NULL) { dprintk("RPC: %s: request buffer %d alloc" " failed\n", __func__, i); @@ -1126,16 +1139,16 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, buf->rb_send_bufs[i]->rl_buffer = buf; rc = rpcrdma_register_internal(ia, req->rl_base, - len - offsetof(struct rpcrdma_req, rl_base), + wlen - offsetof(struct rpcrdma_req, rl_base), &buf->rb_send_bufs[i]->rl_handle, &buf->rb_send_bufs[i]->rl_iov); if (rc) goto out; - buf->rb_send_bufs[i]->rl_size = len-sizeof(struct rpcrdma_req); + buf->rb_send_bufs[i]->rl_size = wlen - + sizeof(struct rpcrdma_req); - len = cdata->inline_rsize + sizeof(struct rpcrdma_rep); - rep = kmalloc(len, GFP_KERNEL); + rep = kmalloc(rlen, GFP_KERNEL); if (rep == NULL) { dprintk("RPC: %s: reply buffer %d alloc failed\n", __func__, i); @@ -1145,10 +1158,9 @@ rpcrdma_buffer_create(struct rpcrdma_buffer *buf, struct rpcrdma_ep *ep, memset(rep, 0, sizeof(struct rpcrdma_rep)); buf->rb_recv_bufs[i] = rep; buf->rb_recv_bufs[i]->rr_buffer = buf; - init_waitqueue_head(&rep->rr_unbind); rc = rpcrdma_register_internal(ia, rep->rr_base, - len - offsetof(struct rpcrdma_rep, rr_base), + rlen - offsetof(struct rpcrdma_rep, rr_base), &buf->rb_recv_bufs[i]->rr_handle, &buf->rb_recv_bufs[i]->rr_iov); if (rc) @@ -1179,7 +1191,6 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) /* clean up in reverse order from create * 1. recv mr memory (mr free, then kfree) - * 1a. bind mw memory * 2. send mr memory (mr free, then kfree) * 3. padding (if any) [moved to rpcrdma_ep_destroy] * 4. arrays @@ -1194,41 +1205,6 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) kfree(buf->rb_recv_bufs[i]); } if (buf->rb_send_bufs && buf->rb_send_bufs[i]) { - while (!list_empty(&buf->rb_mws)) { - r = list_entry(buf->rb_mws.next, - struct rpcrdma_mw, mw_list); - list_del(&r->mw_list); - switch (ia->ri_memreg_strategy) { - case RPCRDMA_FRMR: - rc = ib_dereg_mr(r->r.frmr.fr_mr); - if (rc) - dprintk("RPC: %s:" - " ib_dereg_mr" - " failed %i\n", - __func__, rc); - ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); - break; - case RPCRDMA_MTHCAFMR: - rc = ib_dealloc_fmr(r->r.fmr); - if (rc) - dprintk("RPC: %s:" - " ib_dealloc_fmr" - " failed %i\n", - __func__, rc); - break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - rc = ib_dealloc_mw(r->r.mw); - if (rc) - dprintk("RPC: %s:" - " ib_dealloc_mw" - " failed %i\n", - __func__, rc); - break; - default: - break; - } - } rpcrdma_deregister_internal(ia, buf->rb_send_bufs[i]->rl_handle, &buf->rb_send_bufs[i]->rl_iov); @@ -1236,6 +1212,33 @@ rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf) } } + while (!list_empty(&buf->rb_mws)) { + r = list_entry(buf->rb_mws.next, + struct rpcrdma_mw, mw_list); + list_del(&r->mw_list); + switch (ia->ri_memreg_strategy) { + case RPCRDMA_FRMR: + rc = ib_dereg_mr(r->r.frmr.fr_mr); + if (rc) + dprintk("RPC: %s:" + " ib_dereg_mr" + " failed %i\n", + __func__, rc); + ib_free_fast_reg_page_list(r->r.frmr.fr_pgl); + break; + case RPCRDMA_MTHCAFMR: + rc = ib_dealloc_fmr(r->r.fmr); + if (rc) + dprintk("RPC: %s:" + " ib_dealloc_fmr" + " failed %i\n", + __func__, rc); + break; + default: + break; + } + } + kfree(buf->rb_pool); } @@ -1299,21 +1302,17 @@ rpcrdma_buffer_put(struct rpcrdma_req *req) int i; unsigned long flags; - BUG_ON(req->rl_nchunks != 0); spin_lock_irqsave(&buffers->rb_lock, flags); buffers->rb_send_bufs[--buffers->rb_send_index] = req; req->rl_niovs = 0; if (req->rl_reply) { buffers->rb_recv_bufs[--buffers->rb_recv_index] = req->rl_reply; - init_waitqueue_head(&req->rl_reply->rr_unbind); req->rl_reply->rr_func = NULL; req->rl_reply = NULL; } switch (ia->ri_memreg_strategy) { case RPCRDMA_FRMR: case RPCRDMA_MTHCAFMR: - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: /* * Cycle mw's back in reverse order, and "spin" them. * This delays and scrambles reuse as much as possible. @@ -1358,8 +1357,7 @@ rpcrdma_recv_buffer_get(struct rpcrdma_req *req) /* * Put reply buffers back into pool when not attached to - * request. This happens in error conditions, and when - * aborting unbinds. Pre-decrement counter/array index. + * request. This happens in error conditions. */ void rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep) @@ -1498,8 +1496,8 @@ rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, seg1->mr_offset -= pageoff; /* start of page */ seg1->mr_len += pageoff; len = -pageoff; - if (*nsegs > RPCRDMA_MAX_DATA_SEGS) - *nsegs = RPCRDMA_MAX_DATA_SEGS; + if (*nsegs > ia->ri_max_frmr_depth) + *nsegs = ia->ri_max_frmr_depth; for (page_no = i = 0; i < *nsegs;) { rpcrdma_map_one(ia, seg, writing); pa = seg->mr_dma; @@ -1536,10 +1534,6 @@ rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, } else post_wr = &frmr_wr; - /* Bump the key */ - key = (u8)(seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey & 0x000000FF); - ib_update_fast_reg_key(seg1->mr_chunk.rl_mw->r.frmr.fr_mr, ++key); - /* Prepare FRMR WR */ memset(&frmr_wr, 0, sizeof frmr_wr); frmr_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw; @@ -1550,7 +1544,16 @@ rpcrdma_register_frmr_external(struct rpcrdma_mr_seg *seg, frmr_wr.wr.fast_reg.page_list_len = page_no; frmr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; frmr_wr.wr.fast_reg.length = page_no << PAGE_SHIFT; - BUG_ON(frmr_wr.wr.fast_reg.length < len); + if (frmr_wr.wr.fast_reg.length < len) { + while (seg1->mr_nsegs--) + rpcrdma_unmap_one(ia, seg++); + return -EIO; + } + + /* Bump the key */ + key = (u8)(seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey & 0x000000FF); + ib_update_fast_reg_key(seg1->mr_chunk.rl_mw->r.frmr.fr_mr, ++key); + frmr_wr.wr.fast_reg.access_flags = (writing ? IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE : IB_ACCESS_REMOTE_READ); @@ -1661,135 +1664,6 @@ rpcrdma_deregister_fmr_external(struct rpcrdma_mr_seg *seg, return rc; } -static int -rpcrdma_register_memwin_external(struct rpcrdma_mr_seg *seg, - int *nsegs, int writing, struct rpcrdma_ia *ia, - struct rpcrdma_xprt *r_xprt) -{ - int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE : - IB_ACCESS_REMOTE_READ); - struct ib_mw_bind param; - int rc; - - *nsegs = 1; - rpcrdma_map_one(ia, seg, writing); - param.bind_info.mr = ia->ri_bind_mem; - param.wr_id = 0ULL; /* no send cookie */ - param.bind_info.addr = seg->mr_dma; - param.bind_info.length = seg->mr_len; - param.send_flags = 0; - param.bind_info.mw_access_flags = mem_priv; - - DECR_CQCOUNT(&r_xprt->rx_ep); - rc = ib_bind_mw(ia->ri_id->qp, seg->mr_chunk.rl_mw->r.mw, ¶m); - if (rc) { - dprintk("RPC: %s: failed ib_bind_mw " - "%u@0x%llx status %i\n", - __func__, seg->mr_len, - (unsigned long long)seg->mr_dma, rc); - rpcrdma_unmap_one(ia, seg); - } else { - seg->mr_rkey = seg->mr_chunk.rl_mw->r.mw->rkey; - seg->mr_base = param.bind_info.addr; - seg->mr_nsegs = 1; - } - return rc; -} - -static int -rpcrdma_deregister_memwin_external(struct rpcrdma_mr_seg *seg, - struct rpcrdma_ia *ia, - struct rpcrdma_xprt *r_xprt, void **r) -{ - struct ib_mw_bind param; - LIST_HEAD(l); - int rc; - - BUG_ON(seg->mr_nsegs != 1); - param.bind_info.mr = ia->ri_bind_mem; - param.bind_info.addr = 0ULL; /* unbind */ - param.bind_info.length = 0; - param.bind_info.mw_access_flags = 0; - if (*r) { - param.wr_id = (u64) (unsigned long) *r; - param.send_flags = IB_SEND_SIGNALED; - INIT_CQCOUNT(&r_xprt->rx_ep); - } else { - param.wr_id = 0ULL; - param.send_flags = 0; - DECR_CQCOUNT(&r_xprt->rx_ep); - } - rc = ib_bind_mw(ia->ri_id->qp, seg->mr_chunk.rl_mw->r.mw, ¶m); - rpcrdma_unmap_one(ia, seg); - if (rc) - dprintk("RPC: %s: failed ib_(un)bind_mw," - " status %i\n", __func__, rc); - else - *r = NULL; /* will upcall on completion */ - return rc; -} - -static int -rpcrdma_register_default_external(struct rpcrdma_mr_seg *seg, - int *nsegs, int writing, struct rpcrdma_ia *ia) -{ - int mem_priv = (writing ? IB_ACCESS_REMOTE_WRITE : - IB_ACCESS_REMOTE_READ); - struct rpcrdma_mr_seg *seg1 = seg; - struct ib_phys_buf ipb[RPCRDMA_MAX_DATA_SEGS]; - int len, i, rc = 0; - - if (*nsegs > RPCRDMA_MAX_DATA_SEGS) - *nsegs = RPCRDMA_MAX_DATA_SEGS; - for (len = 0, i = 0; i < *nsegs;) { - rpcrdma_map_one(ia, seg, writing); - ipb[i].addr = seg->mr_dma; - ipb[i].size = seg->mr_len; - len += seg->mr_len; - ++seg; - ++i; - /* Check for holes */ - if ((i < *nsegs && offset_in_page(seg->mr_offset)) || - offset_in_page((seg-1)->mr_offset+(seg-1)->mr_len)) - break; - } - seg1->mr_base = seg1->mr_dma; - seg1->mr_chunk.rl_mr = ib_reg_phys_mr(ia->ri_pd, - ipb, i, mem_priv, &seg1->mr_base); - if (IS_ERR(seg1->mr_chunk.rl_mr)) { - rc = PTR_ERR(seg1->mr_chunk.rl_mr); - dprintk("RPC: %s: failed ib_reg_phys_mr " - "%u@0x%llx (%d)... status %i\n", - __func__, len, - (unsigned long long)seg1->mr_dma, i, rc); - while (i--) - rpcrdma_unmap_one(ia, --seg); - } else { - seg1->mr_rkey = seg1->mr_chunk.rl_mr->rkey; - seg1->mr_nsegs = i; - seg1->mr_len = len; - } - *nsegs = i; - return rc; -} - -static int -rpcrdma_deregister_default_external(struct rpcrdma_mr_seg *seg, - struct rpcrdma_ia *ia) -{ - struct rpcrdma_mr_seg *seg1 = seg; - int rc; - - rc = ib_dereg_mr(seg1->mr_chunk.rl_mr); - seg1->mr_chunk.rl_mr = NULL; - while (seg1->mr_nsegs--) - rpcrdma_unmap_one(ia, seg++); - if (rc) - dprintk("RPC: %s: failed ib_dereg_mr," - " status %i\n", __func__, rc); - return rc; -} - int rpcrdma_register_external(struct rpcrdma_mr_seg *seg, int nsegs, int writing, struct rpcrdma_xprt *r_xprt) @@ -1819,16 +1693,8 @@ rpcrdma_register_external(struct rpcrdma_mr_seg *seg, rc = rpcrdma_register_fmr_external(seg, &nsegs, writing, ia); break; - /* Registration using memory windows */ - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - rc = rpcrdma_register_memwin_external(seg, &nsegs, writing, ia, r_xprt); - break; - - /* Default registration each time */ default: - rc = rpcrdma_register_default_external(seg, &nsegs, writing, ia); - break; + return -1; } if (rc) return -1; @@ -1838,7 +1704,7 @@ rpcrdma_register_external(struct rpcrdma_mr_seg *seg, int rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, - struct rpcrdma_xprt *r_xprt, void *r) + struct rpcrdma_xprt *r_xprt) { struct rpcrdma_ia *ia = &r_xprt->rx_ia; int nsegs = seg->mr_nsegs, rc; @@ -1847,9 +1713,7 @@ rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, #if RPCRDMA_PERSISTENT_REGISTRATION case RPCRDMA_ALLPHYSICAL: - BUG_ON(nsegs != 1); rpcrdma_unmap_one(ia, seg); - rc = 0; break; #endif @@ -1861,21 +1725,9 @@ rpcrdma_deregister_external(struct rpcrdma_mr_seg *seg, rc = rpcrdma_deregister_fmr_external(seg, ia); break; - case RPCRDMA_MEMWINDOWS_ASYNC: - case RPCRDMA_MEMWINDOWS: - rc = rpcrdma_deregister_memwin_external(seg, ia, r_xprt, &r); - break; - default: - rc = rpcrdma_deregister_default_external(seg, ia); break; } - if (r) { - struct rpcrdma_rep *rep = r; - void (*func)(struct rpcrdma_rep *) = rep->rr_func; - rep->rr_func = NULL; - func(rep); /* dereg done, callback now */ - } return nsegs; } @@ -1950,7 +1802,6 @@ rpcrdma_ep_post_recv(struct rpcrdma_ia *ia, ib_dma_sync_single_for_cpu(ia->ri_id->device, rep->rr_iov.addr, rep->rr_iov.length, DMA_BIDIRECTIONAL); - DECR_CQCOUNT(ep); rc = ib_post_recv(ia->ri_id->qp, &recv_wr, &recv_wr_fail); if (rc) diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index cc1445dc1d1..89e7cd47970 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -43,6 +43,7 @@ #include <linux/wait.h> /* wait_queue_head_t, etc */ #include <linux/spinlock.h> /* spinlock_t, etc */ #include <linux/atomic.h> /* atomic_t, etc */ +#include <linux/workqueue.h> /* struct work_struct */ #include <rdma/rdma_cm.h> /* RDMA connection api */ #include <rdma/ib_verbs.h> /* RDMA verbs api */ @@ -66,18 +67,21 @@ struct rpcrdma_ia { struct completion ri_done; int ri_async_rc; enum rpcrdma_memreg ri_memreg_strategy; + unsigned int ri_max_frmr_depth; }; /* * RDMA Endpoint -- one per transport instance */ +#define RPCRDMA_WC_BUDGET (128) +#define RPCRDMA_POLLSIZE (16) + struct rpcrdma_ep { atomic_t rep_cqcount; int rep_cqinit; int rep_connected; struct rpcrdma_ia *rep_ia; - struct ib_cq *rep_cq; struct ib_qp_init_attr rep_attr; wait_queue_head_t rep_connect_wait; struct ib_sge rep_pad; /* holds zeroed pad */ @@ -86,6 +90,9 @@ struct rpcrdma_ep { struct rpc_xprt *rep_xprt; /* for rep_func */ struct rdma_conn_param rep_remote_cma; struct sockaddr_storage rep_remote_addr; + struct delayed_work rep_connect_worker; + struct ib_wc rep_send_wcs[RPCRDMA_POLLSIZE]; + struct ib_wc rep_recv_wcs[RPCRDMA_POLLSIZE]; }; #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit) @@ -124,7 +131,6 @@ struct rpcrdma_rep { struct rpc_xprt *rr_xprt; /* needed for request/reply matching */ void (*rr_func)(struct rpcrdma_rep *);/* called by tasklet in softint */ struct list_head rr_list; /* tasklet list */ - wait_queue_head_t rr_unbind; /* optional unbind wait */ struct ib_sge rr_iov; /* for posting */ struct ib_mr *rr_handle; /* handle for mem in rr_iov */ char rr_base[MAX_RPCRDMAHDR]; /* minimal inline receive buffer */ @@ -159,7 +165,6 @@ struct rpcrdma_mr_seg { /* chunk descriptors */ struct ib_mr *rl_mr; /* if registered directly */ struct rpcrdma_mw { /* if registered from region */ union { - struct ib_mw *mw; struct ib_fmr *fmr; struct { struct ib_fast_reg_page_list *fr_pgl; @@ -207,7 +212,6 @@ struct rpcrdma_req { struct rpcrdma_buffer { spinlock_t rb_lock; /* protects indexes */ atomic_t rb_credits; /* most recent server credits */ - unsigned long rb_cwndscale; /* cached framework rpc_cwndscale */ int rb_max_requests;/* client max requests */ struct list_head rb_mws; /* optional memory windows/fmrs/frmrs */ int rb_send_index; @@ -300,7 +304,7 @@ void rpcrdma_ia_close(struct rpcrdma_ia *); */ int rpcrdma_ep_create(struct rpcrdma_ep *, struct rpcrdma_ia *, struct rpcrdma_create_data_internal *); -int rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *); +void rpcrdma_ep_destroy(struct rpcrdma_ep *, struct rpcrdma_ia *); int rpcrdma_ep_connect(struct rpcrdma_ep *, struct rpcrdma_ia *); int rpcrdma_ep_disconnect(struct rpcrdma_ep *, struct rpcrdma_ia *); @@ -330,11 +334,12 @@ int rpcrdma_deregister_internal(struct rpcrdma_ia *, int rpcrdma_register_external(struct rpcrdma_mr_seg *, int, int, struct rpcrdma_xprt *); int rpcrdma_deregister_external(struct rpcrdma_mr_seg *, - struct rpcrdma_xprt *, void *); + struct rpcrdma_xprt *); /* * RPC/RDMA connection management calls - xprtrdma/rpc_rdma.c */ +void rpcrdma_connect_worker(struct work_struct *); void rpcrdma_conn_func(struct rpcrdma_ep *); void rpcrdma_reply_handler(struct rpcrdma_rep *); diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index ee03d35677d..be8bbd5d65e 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -254,9 +254,10 @@ struct sock_xprt { /* * Saved socket callback addresses */ - void (*old_data_ready)(struct sock *, int); + void (*old_data_ready)(struct sock *); void (*old_state_change)(struct sock *); void (*old_write_space)(struct sock *); + void (*old_error_report)(struct sock *); }; /* @@ -274,6 +275,11 @@ struct sock_xprt { */ #define TCP_RPC_REPLY (1UL << 6) +static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) +{ + return (struct rpc_xprt *) sk->sk_user_data; +} + static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt) { return (struct sockaddr *) &xprt->addr; @@ -393,8 +399,10 @@ static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen, return kernel_sendmsg(sock, &msg, NULL, 0, 0); } -static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more) +static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more, bool zerocopy) { + ssize_t (*do_sendpage)(struct socket *sock, struct page *page, + int offset, size_t size, int flags); struct page **ppage; unsigned int remainder; int err, sent = 0; @@ -403,6 +411,9 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i base += xdr->page_base; ppage = xdr->pages + (base >> PAGE_SHIFT); base &= ~PAGE_MASK; + do_sendpage = sock->ops->sendpage; + if (!zerocopy) + do_sendpage = sock_no_sendpage; for(;;) { unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder); int flags = XS_SENDMSG_FLAGS; @@ -410,7 +421,7 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i remainder -= len; if (remainder != 0 || more) flags |= MSG_MORE; - err = sock->ops->sendpage(sock, *ppage, base, len, flags); + err = do_sendpage(sock, *ppage, base, len, flags); if (remainder == 0 || err != len) break; sent += err; @@ -431,9 +442,10 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i * @addrlen: UDP only -- length of destination address * @xdr: buffer containing this request * @base: starting position in the buffer + * @zerocopy: true if it is safe to use sendpage() * */ -static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base) +static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, struct xdr_buf *xdr, unsigned int base, bool zerocopy) { unsigned int remainder = xdr->len - base; int err, sent = 0; @@ -461,7 +473,7 @@ static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, if (base < xdr->page_len) { unsigned int len = xdr->page_len - base; remainder -= len; - err = xs_send_pagedata(sock, xdr, base, remainder != 0); + err = xs_send_pagedata(sock, xdr, base, remainder != 0, zerocopy); if (remainder == 0 || err != len) goto out; sent += err; @@ -498,6 +510,7 @@ static int xs_nospace(struct rpc_task *task) struct rpc_rqst *req = task->tk_rqstp; struct rpc_xprt *xprt = req->rq_xprt; struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); + struct sock *sk = transport->inet; int ret = -EAGAIN; dprintk("RPC: %5u xmit incomplete (%u left of %u)\n", @@ -515,7 +528,7 @@ static int xs_nospace(struct rpc_task *task) * window size */ set_bit(SOCK_NOSPACE, &transport->sock->flags); - transport->inet->sk_write_pending++; + sk->sk_write_pending++; /* ...and wait for more buffer space */ xprt_wait_for_buffer_space(task, xs_nospace_callback); } @@ -525,6 +538,9 @@ static int xs_nospace(struct rpc_task *task) } spin_unlock_bh(&xprt->transport_lock); + + /* Race breaker in case memory is freed before above code is called */ + sk->sk_write_space(sk); return ret; } @@ -564,7 +580,7 @@ static int xs_local_send_request(struct rpc_task *task) req->rq_svec->iov_base, req->rq_svec->iov_len); status = xs_sendpages(transport->sock, NULL, 0, - xdr, req->rq_bytes_sent); + xdr, req->rq_bytes_sent, true); dprintk("RPC: %s(%u) = %d\n", __func__, xdr->len - req->rq_bytes_sent, status); if (likely(status >= 0)) { @@ -620,7 +636,7 @@ static int xs_udp_send_request(struct rpc_task *task) status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen, xdr, - req->rq_bytes_sent); + req->rq_bytes_sent, true); dprintk("RPC: xs_udp_send_request(%u) = %d\n", xdr->len - req->rq_bytes_sent, status); @@ -693,6 +709,7 @@ static int xs_tcp_send_request(struct rpc_task *task) struct rpc_xprt *xprt = req->rq_xprt; struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); struct xdr_buf *xdr = &req->rq_snd_buf; + bool zerocopy = true; int status; xs_encode_stream_record_marker(&req->rq_snd_buf); @@ -700,13 +717,20 @@ static int xs_tcp_send_request(struct rpc_task *task) xs_pktdump("packet data:", req->rq_svec->iov_base, req->rq_svec->iov_len); + /* Don't use zero copy if this is a resend. If the RPC call + * completes while the socket holds a reference to the pages, + * then we may end up resending corrupted data. + */ + if (task->tk_flags & RPC_TASK_SENT) + zerocopy = false; /* Continue transmitting the packet/record. We must be careful * to cope with writespace callbacks arriving _after_ we have * called sendmsg(). */ while (1) { status = xs_sendpages(transport->sock, - NULL, 0, xdr, req->rq_bytes_sent); + NULL, 0, xdr, req->rq_bytes_sent, + zerocopy); dprintk("RPC: xs_tcp_send_request(%u) = %d\n", xdr->len - req->rq_bytes_sent, status); @@ -785,6 +809,7 @@ static void xs_save_old_callbacks(struct sock_xprt *transport, struct sock *sk) transport->old_data_ready = sk->sk_data_ready; transport->old_state_change = sk->sk_state_change; transport->old_write_space = sk->sk_write_space; + transport->old_error_report = sk->sk_error_report; } static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *sk) @@ -792,6 +817,34 @@ static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *s sk->sk_data_ready = transport->old_data_ready; sk->sk_state_change = transport->old_state_change; sk->sk_write_space = transport->old_write_space; + sk->sk_error_report = transport->old_error_report; +} + +/** + * xs_error_report - callback to handle TCP socket state errors + * @sk: socket + * + * Note: we don't call sock_error() since there may be a rpc_task + * using the socket, and so we don't want to clear sk->sk_err. + */ +static void xs_error_report(struct sock *sk) +{ + struct rpc_xprt *xprt; + int err; + + read_lock_bh(&sk->sk_callback_lock); + if (!(xprt = xprt_from_sock(sk))) + goto out; + + err = -sk->sk_err; + if (err == 0) + goto out; + dprintk("RPC: xs_error_report client %p, error=%d...\n", + xprt, -err); + trace_rpc_socket_error(xprt, sk->sk_socket, err); + xprt_wake_pending_tasks(xprt, err); + out: + read_unlock_bh(&sk->sk_callback_lock); } static void xs_reset_transport(struct sock_xprt *transport) @@ -813,8 +866,6 @@ static void xs_reset_transport(struct sock_xprt *transport) xs_restore_old_callbacks(transport, sk); write_unlock_bh(&sk->sk_callback_lock); - sk->sk_no_check = 0; - trace_rpc_socket_close(&transport->xprt, sock); sock_release(sock); } @@ -835,14 +886,16 @@ static void xs_close(struct rpc_xprt *xprt) dprintk("RPC: xs_close xprt %p\n", xprt); + cancel_delayed_work_sync(&transport->connect_worker); + xs_reset_transport(transport); xprt->reestablish_timeout = 0; - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(XPRT_CONNECTION_ABORT, &xprt->state); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); clear_bit(XPRT_CLOSING, &xprt->state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); xprt_disconnect_done(xprt); } @@ -854,12 +907,10 @@ static void xs_tcp_close(struct rpc_xprt *xprt) xs_tcp_shutdown(xprt); } -static void xs_local_destroy(struct rpc_xprt *xprt) +static void xs_xprt_free(struct rpc_xprt *xprt) { - xs_close(xprt); xs_free_peer_addresses(xprt); xprt_free(xprt); - module_put(THIS_MODULE); } /** @@ -869,18 +920,11 @@ static void xs_local_destroy(struct rpc_xprt *xprt) */ static void xs_destroy(struct rpc_xprt *xprt) { - struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); - dprintk("RPC: xs_destroy xprt %p\n", xprt); - cancel_delayed_work_sync(&transport->connect_worker); - - xs_local_destroy(xprt); -} - -static inline struct rpc_xprt *xprt_from_sock(struct sock *sk) -{ - return (struct rpc_xprt *) sk->sk_user_data; + xs_close(xprt); + xs_xprt_free(xprt); + module_put(THIS_MODULE); } static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb) @@ -905,7 +949,7 @@ static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb) * * Currently this assumes we can read the whole reply in a single gulp. */ -static void xs_local_data_ready(struct sock *sk, int len) +static void xs_local_data_ready(struct sock *sk) { struct rpc_task *task; struct rpc_xprt *xprt; @@ -968,7 +1012,7 @@ static void xs_local_data_ready(struct sock *sk, int len) * @len: how much data to read * */ -static void xs_udp_data_ready(struct sock *sk, int len) +static void xs_udp_data_ready(struct sock *sk) { struct rpc_task *task; struct rpc_xprt *xprt; @@ -1265,41 +1309,29 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt, * If we're unable to obtain the rpc_rqst we schedule the closing of the * connection and return -1. */ -static inline int xs_tcp_read_callback(struct rpc_xprt *xprt, +static int xs_tcp_read_callback(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) { struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); struct rpc_rqst *req; - req = xprt_alloc_bc_request(xprt); + /* Look up and lock the request corresponding to the given XID */ + spin_lock(&xprt->transport_lock); + req = xprt_lookup_bc_request(xprt, transport->tcp_xid); if (req == NULL) { + spin_unlock(&xprt->transport_lock); printk(KERN_WARNING "Callback slot table overflowed\n"); xprt_force_disconnect(xprt); return -1; } - req->rq_xid = transport->tcp_xid; dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid)); xs_tcp_read_common(xprt, desc, req); - if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) { - struct svc_serv *bc_serv = xprt->bc_serv; - - /* - * Add callback request to callback list. The callback - * service sleeps on the sv_cb_waitq waiting for new - * requests. Wake it up after adding enqueing the - * request. - */ - dprintk("RPC: add callback request to list\n"); - spin_lock(&bc_serv->sv_cb_lock); - list_add(&req->rq_bc_list, &bc_serv->sv_cb_list); - spin_unlock(&bc_serv->sv_cb_lock); - wake_up(&bc_serv->sv_cb_waitq); - } - - req->rq_private_buf.len = transport->tcp_copied; + if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) + xprt_complete_bc_request(req, transport->tcp_copied); + spin_unlock(&xprt->transport_lock); return 0; } @@ -1403,7 +1435,7 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns * @bytes: how much data to read * */ -static void xs_tcp_data_ready(struct sock *sk, int bytes) +static void xs_tcp_data_ready(struct sock *sk) { struct rpc_xprt *xprt; read_descriptor_t rd_desc; @@ -1463,12 +1495,12 @@ static void xs_tcp_cancel_linger_timeout(struct rpc_xprt *xprt) static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt) { - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(XPRT_CONNECTION_ABORT, &xprt->state); clear_bit(XPRT_CONNECTION_CLOSE, &xprt->state); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); clear_bit(XPRT_CLOSING, &xprt->state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); } static void xs_sock_mark_closed(struct rpc_xprt *xprt) @@ -1511,6 +1543,7 @@ static void xs_tcp_state_change(struct sock *sk) transport->tcp_copied = 0; transport->tcp_flags = TCP_RCV_COPY_FRAGHDR | TCP_RCV_COPY_XID; + xprt->connect_cookie++; xprt_wake_pending_tasks(xprt, -EAGAIN); } @@ -1521,10 +1554,10 @@ static void xs_tcp_state_change(struct sock *sk) xprt->connect_cookie++; xprt->reestablish_timeout = 0; set_bit(XPRT_CLOSING, &xprt->state); - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(XPRT_CONNECTED, &xprt->state); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout); break; case TCP_CLOSE_WAIT: @@ -1543,9 +1576,9 @@ static void xs_tcp_state_change(struct sock *sk) case TCP_LAST_ACK: set_bit(XPRT_CLOSING, &xprt->state); xs_tcp_schedule_linger_timeout(xprt, xs_tcp_fin_timeout); - smp_mb__before_clear_bit(); + smp_mb__before_atomic(); clear_bit(XPRT_CONNECTED, &xprt->state); - smp_mb__after_clear_bit(); + smp_mb__after_atomic(); break; case TCP_CLOSE: xs_tcp_cancel_linger_timeout(xprt); @@ -1666,7 +1699,7 @@ static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task) static unsigned short xs_get_random_port(void) { unsigned short range = xprt_max_resvport - xprt_min_resvport; - unsigned short rand = (unsigned short) net_random() % range; + unsigned short rand = (unsigned short) prandom_u32() % range; return rand + xprt_min_resvport; } @@ -1816,6 +1849,10 @@ static inline void xs_reclassify_socket(int family, struct socket *sock) } #endif +static void xs_dummy_setup_socket(struct work_struct *work) +{ +} + static struct socket *xs_create_sock(struct rpc_xprt *xprt, struct sock_xprt *transport, int family, int type, int protocol) { @@ -1857,6 +1894,7 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt, sk->sk_user_data = xprt; sk->sk_data_ready = xs_local_data_ready; sk->sk_write_space = xs_udp_write_space; + sk->sk_error_report = xs_error_report; sk->sk_allocation = GFP_ATOMIC; xprt_clear_connected(xprt); @@ -2006,7 +2044,6 @@ static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) sk->sk_user_data = xprt; sk->sk_data_ready = xs_udp_data_ready; sk->sk_write_space = xs_udp_write_space; - sk->sk_no_check = UDP_CSUM_NORCV; sk->sk_allocation = GFP_ATOMIC; xprt_set_connected(xprt); @@ -2112,6 +2149,19 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) if (!transport->inet) { struct sock *sk = sock->sk; + unsigned int keepidle = xprt->timeout->to_initval / HZ; + unsigned int keepcnt = xprt->timeout->to_retries + 1; + unsigned int opt_on = 1; + + /* TCP Keepalive options */ + kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, + (char *)&opt_on, sizeof(opt_on)); + kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, + (char *)&keepidle, sizeof(keepidle)); + kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, + (char *)&keepidle, sizeof(keepidle)); + kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT, + (char *)&keepcnt, sizeof(keepcnt)); write_lock_bh(&sk->sk_callback_lock); @@ -2121,6 +2171,7 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) sk->sk_data_ready = xs_tcp_data_ready; sk->sk_state_change = xs_tcp_state_change; sk->sk_write_space = xs_tcp_write_space; + sk->sk_error_report = xs_error_report; sk->sk_allocation = GFP_ATOMIC; /* socket options */ @@ -2151,7 +2202,6 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) case 0: case -EINPROGRESS: /* SYN_SENT! */ - xprt->connect_cookie++; if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO) xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO; } @@ -2484,6 +2534,10 @@ static void bc_close(struct rpc_xprt *xprt) static void bc_destroy(struct rpc_xprt *xprt) { + dprintk("RPC: bc_destroy xprt %p\n", xprt); + + xs_xprt_free(xprt); + module_put(THIS_MODULE); } static struct rpc_xprt_ops xs_local_ops = { @@ -2498,7 +2552,7 @@ static struct rpc_xprt_ops xs_local_ops = { .send_request = xs_local_send_request, .set_retrans_timeout = xprt_set_retrans_timeout_def, .close = xs_close, - .destroy = xs_local_destroy, + .destroy = xs_destroy, .print_stats = xs_local_print_stats, }; @@ -2655,6 +2709,9 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args) xprt->ops = &xs_local_ops; xprt->timeout = &xs_local_default_timeout; + INIT_DELAYED_WORK(&transport->connect_worker, + xs_dummy_setup_socket); + switch (sun->sun_family) { case AF_LOCAL: if (sun->sun_path[0] != '/') { @@ -2681,7 +2738,7 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args) return xprt; ret = ERR_PTR(-EINVAL); out_err: - xprt_free(xprt); + xs_xprt_free(xprt); return ret; } @@ -2759,7 +2816,7 @@ static struct rpc_xprt *xs_setup_udp(struct xprt_create *args) return xprt; ret = ERR_PTR(-EINVAL); out_err: - xprt_free(xprt); + xs_xprt_free(xprt); return ret; } @@ -2834,12 +2891,11 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) xprt->address_strings[RPC_DISPLAY_ADDR], xprt->address_strings[RPC_DISPLAY_PROTO]); - if (try_module_get(THIS_MODULE)) return xprt; ret = ERR_PTR(-EINVAL); out_err: - xprt_free(xprt); + xs_xprt_free(xprt); return ret; } @@ -2856,15 +2912,6 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args) struct svc_sock *bc_sock; struct rpc_xprt *ret; - if (args->bc_xprt->xpt_bc_xprt) { - /* - * This server connection already has a backchannel - * export; we can't create a new one, as we wouldn't be - * able to match replies based on xid any more. So, - * reuse the already-existing one: - */ - return args->bc_xprt->xpt_bc_xprt; - } xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries, xprt_tcp_slot_table_entries); if (IS_ERR(xprt)) @@ -2905,10 +2952,9 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args) /* * Once we've associated a backchannel xprt with a connection, - * we want to keep it around as long as long as the connection - * lasts, in case we need to start using it for a backchannel - * again; this reference won't be dropped until bc_xprt is - * destroyed. + * we want to keep it around as long as the connection lasts, + * in case we need to start using it for a backchannel again; + * this reference won't be dropped until bc_xprt is destroyed. */ xprt_get(xprt); args->bc_xprt->xpt_bc_xprt = xprt; @@ -2923,13 +2969,14 @@ static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args) */ xprt_set_connected(xprt); - if (try_module_get(THIS_MODULE)) return xprt; + + args->bc_xprt->xpt_bc_xprt = NULL; xprt_put(xprt); ret = ERR_PTR(-EINVAL); out_err: - xprt_free(xprt); + xs_xprt_free(xprt); return ret; } |