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-rw-r--r--fs/nfs/dir.c83
-rw-r--r--fs/nfs/file.c3
-rw-r--r--fs/nfs/getroot.c4
-rw-r--r--fs/nfs/inode.c2
-rw-r--r--fs/nfs/internal.h14
-rw-r--r--fs/nfs/nfs4_fs.h2
-rw-r--r--fs/nfs/nfs4filelayout.c352
-rw-r--r--fs/nfs/nfs4filelayout.h2
-rw-r--r--fs/nfs/nfs4filelayoutdev.c178
-rw-r--r--fs/nfs/nfs4proc.c125
-rw-r--r--fs/nfs/nfs4xdr.c167
-rw-r--r--fs/nfs/pagelist.c8
-rw-r--r--fs/nfs/pnfs.c142
-rw-r--r--fs/nfs/pnfs.h83
-rw-r--r--fs/nfs/write.c214
-rw-r--r--fs/nfs_common/nfsacl.c1
-rw-r--r--include/linux/nfs4.h1
-rw-r--r--include/linux/nfs_fs.h10
-rw-r--r--include/linux/nfs_page.h7
-rw-r--r--include/linux/nfs_xdr.h30
-rw-r--r--net/sunrpc/xprtsock.c2
21 files changed, 1237 insertions, 193 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a83cd0d9dfa..7237672216c 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -44,6 +44,7 @@
/* #define NFS_DEBUG_VERBOSE 1 */
static int nfs_opendir(struct inode *, struct file *);
+static int nfs_closedir(struct inode *, struct file *);
static int nfs_readdir(struct file *, void *, filldir_t);
static struct dentry *nfs_lookup(struct inode *, struct dentry *, struct nameidata *);
static int nfs_create(struct inode *, struct dentry *, int, struct nameidata *);
@@ -64,7 +65,7 @@ const struct file_operations nfs_dir_operations = {
.read = generic_read_dir,
.readdir = nfs_readdir,
.open = nfs_opendir,
- .release = nfs_release,
+ .release = nfs_closedir,
.fsync = nfs_fsync_dir,
};
@@ -133,13 +134,35 @@ const struct inode_operations nfs4_dir_inode_operations = {
#endif /* CONFIG_NFS_V4 */
+static struct nfs_open_dir_context *alloc_nfs_open_dir_context(struct rpc_cred *cred)
+{
+ struct nfs_open_dir_context *ctx;
+ ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
+ if (ctx != NULL) {
+ ctx->duped = 0;
+ ctx->dir_cookie = 0;
+ ctx->dup_cookie = 0;
+ ctx->cred = get_rpccred(cred);
+ } else
+ ctx = ERR_PTR(-ENOMEM);
+ return ctx;
+}
+
+static void put_nfs_open_dir_context(struct nfs_open_dir_context *ctx)
+{
+ put_rpccred(ctx->cred);
+ kfree(ctx);
+}
+
/*
* Open file
*/
static int
nfs_opendir(struct inode *inode, struct file *filp)
{
- int res;
+ int res = 0;
+ struct nfs_open_dir_context *ctx;
+ struct rpc_cred *cred;
dfprintk(FILE, "NFS: open dir(%s/%s)\n",
filp->f_path.dentry->d_parent->d_name.name,
@@ -147,8 +170,15 @@ nfs_opendir(struct inode *inode, struct file *filp)
nfs_inc_stats(inode, NFSIOS_VFSOPEN);
- /* Call generic open code in order to cache credentials */
- res = nfs_open(inode, filp);
+ cred = rpc_lookup_cred();
+ if (IS_ERR(cred))
+ return PTR_ERR(cred);
+ ctx = alloc_nfs_open_dir_context(cred);
+ if (IS_ERR(ctx)) {
+ res = PTR_ERR(ctx);
+ goto out;
+ }
+ filp->private_data = ctx;
if (filp->f_path.dentry == filp->f_path.mnt->mnt_root) {
/* This is a mountpoint, so d_revalidate will never
* have been called, so we need to refresh the
@@ -156,9 +186,18 @@ nfs_opendir(struct inode *inode, struct file *filp)
*/
__nfs_revalidate_inode(NFS_SERVER(inode), inode);
}
+out:
+ put_rpccred(cred);
return res;
}
+static int
+nfs_closedir(struct inode *inode, struct file *filp)
+{
+ put_nfs_open_dir_context(filp->private_data);
+ return 0;
+}
+
struct nfs_cache_array_entry {
u64 cookie;
u64 ino;
@@ -284,19 +323,20 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri
{
loff_t diff = desc->file->f_pos - desc->current_index;
unsigned int index;
+ struct nfs_open_dir_context *ctx = desc->file->private_data;
if (diff < 0)
goto out_eof;
if (diff >= array->size) {
if (array->eof_index >= 0)
goto out_eof;
- desc->current_index += array->size;
return -EAGAIN;
}
index = (unsigned int)diff;
*desc->dir_cookie = array->array[index].cookie;
desc->cache_entry_index = index;
+ ctx->duped = 0;
return 0;
out_eof:
desc->eof = 1;
@@ -307,10 +347,18 @@ static
int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc)
{
int i;
+ loff_t new_pos;
int status = -EAGAIN;
+ struct nfs_open_dir_context *ctx = desc->file->private_data;
for (i = 0; i < array->size; i++) {
if (array->array[i].cookie == *desc->dir_cookie) {
+ new_pos = desc->current_index + i;
+ if (new_pos < desc->file->f_pos) {
+ ctx->dup_cookie = *desc->dir_cookie;
+ ctx->duped = 1;
+ }
+ desc->file->f_pos = new_pos;
desc->cache_entry_index = i;
return 0;
}
@@ -342,6 +390,7 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc)
if (status == -EAGAIN) {
desc->last_cookie = array->last_cookie;
+ desc->current_index += array->size;
desc->page_index++;
}
nfs_readdir_release_array(desc->page);
@@ -354,7 +403,8 @@ static
int nfs_readdir_xdr_filler(struct page **pages, nfs_readdir_descriptor_t *desc,
struct nfs_entry *entry, struct file *file, struct inode *inode)
{
- struct rpc_cred *cred = nfs_file_cred(file);
+ struct nfs_open_dir_context *ctx = file->private_data;
+ struct rpc_cred *cred = ctx->cred;
unsigned long timestamp, gencount;
int error;
@@ -693,6 +743,20 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
int i = 0;
int res = 0;
struct nfs_cache_array *array = NULL;
+ struct nfs_open_dir_context *ctx = file->private_data;
+
+ if (ctx->duped != 0 && ctx->dup_cookie == *desc->dir_cookie) {
+ if (printk_ratelimit()) {
+ pr_notice("NFS: directory %s/%s contains a readdir loop. "
+ "Please contact your server vendor. "
+ "Offending cookie: %llu\n",
+ file->f_dentry->d_parent->d_name.name,
+ file->f_dentry->d_name.name,
+ *desc->dir_cookie);
+ }
+ res = -ELOOP;
+ goto out;
+ }
array = nfs_readdir_get_array(desc->page);
if (IS_ERR(array)) {
@@ -785,6 +849,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
struct inode *inode = dentry->d_inode;
nfs_readdir_descriptor_t my_desc,
*desc = &my_desc;
+ struct nfs_open_dir_context *dir_ctx = filp->private_data;
int res;
dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n",
@@ -801,7 +866,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
memset(desc, 0, sizeof(*desc));
desc->file = filp;
- desc->dir_cookie = &nfs_file_open_context(filp)->dir_cookie;
+ desc->dir_cookie = &dir_ctx->dir_cookie;
desc->decode = NFS_PROTO(inode)->decode_dirent;
desc->plus = NFS_USE_READDIRPLUS(inode);
@@ -853,6 +918,7 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
{
struct dentry *dentry = filp->f_path.dentry;
struct inode *inode = dentry->d_inode;
+ struct nfs_open_dir_context *dir_ctx = filp->private_data;
dfprintk(FILE, "NFS: llseek dir(%s/%s, %lld, %d)\n",
dentry->d_parent->d_name.name,
@@ -872,7 +938,8 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
}
if (offset != filp->f_pos) {
filp->f_pos = offset;
- nfs_file_open_context(filp)->dir_cookie = 0;
+ dir_ctx->dir_cookie = 0;
+ dir_ctx->duped = 0;
}
out:
mutex_unlock(&inode->i_mutex);
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index d85a534b15c..3ac5bd695e5 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -326,6 +326,9 @@ nfs_file_fsync(struct file *file, int datasync)
ret = xchg(&ctx->error, 0);
if (!ret && status < 0)
ret = status;
+ if (!ret && !datasync)
+ /* application has asked for meta-data sync */
+ ret = pnfs_layoutcommit_inode(inode, true);
return ret;
}
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 1084792bc0f..dcb61548887 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -222,6 +222,10 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh,
goto out;
}
+ if (fattr->valid & NFS_ATTR_FATTR_FSID &&
+ !nfs_fsid_equal(&server->fsid, &fattr->fsid))
+ memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
+
inode = nfs_fhget(sb, mntfh, fattr);
if (IS_ERR(inode)) {
dprintk("nfs_get_root: get root inode failed\n");
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 058d7d63e56..57bb31ad7a5 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -641,7 +641,6 @@ struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cr
ctx->mode = f_mode;
ctx->flags = 0;
ctx->error = 0;
- ctx->dir_cookie = 0;
nfs_init_lock_context(&ctx->lock_context);
ctx->lock_context.open_context = ctx;
INIT_LIST_HEAD(&ctx->list);
@@ -1473,6 +1472,7 @@ static inline void nfs4_init_once(struct nfs_inode *nfsi)
nfsi->delegation_state = 0;
init_rwsem(&nfsi->rwsem);
nfsi->layout = NULL;
+ atomic_set(&nfsi->commits_outstanding, 0);
#endif
}
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 345d86b90e2..ce118ce885d 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -283,11 +283,25 @@ extern int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt,
extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
/* write.c */
+extern void nfs_commit_free(struct nfs_write_data *p);
extern int nfs_initiate_write(struct nfs_write_data *data,
struct rpc_clnt *clnt,
const struct rpc_call_ops *call_ops,
int how);
extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
+extern int nfs_initiate_commit(struct nfs_write_data *data,
+ struct rpc_clnt *clnt,
+ const struct rpc_call_ops *call_ops,
+ int how);
+extern void nfs_init_commit(struct nfs_write_data *data,
+ struct list_head *head,
+ struct pnfs_layout_segment *lseg);
+void nfs_retry_commit(struct list_head *page_list,
+ struct pnfs_layout_segment *lseg);
+void nfs_commit_clear_lock(struct nfs_inode *nfsi);
+void nfs_commitdata_release(void *data);
+void nfs_commit_release_pages(struct nfs_write_data *data);
+
#ifdef CONFIG_MIGRATION
extern int nfs_migrate_page(struct address_space *,
struct page *, struct page *);
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 72e5f1a2883..e1c261ddd65 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -263,6 +263,8 @@ extern int nfs4_proc_destroy_session(struct nfs4_session *);
extern int nfs4_init_session(struct nfs_server *server);
extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
struct nfs_fsinfo *fsinfo);
+extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
+ bool sync);
static inline bool
is_ds_only_client(struct nfs_client *clp)
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 42855846481..6f8192f4cfc 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -154,6 +154,23 @@ static int filelayout_read_done_cb(struct rpc_task *task,
}
/*
+ * We reference the rpc_cred of the first WRITE that triggers the need for
+ * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
+ * rfc5661 is not clear about which credential should be used.
+ */
+static void
+filelayout_set_layoutcommit(struct nfs_write_data *wdata)
+{
+ if (FILELAYOUT_LSEG(wdata->lseg)->commit_through_mds ||
+ wdata->res.verf->committed == NFS_FILE_SYNC)
+ return;
+
+ pnfs_set_layoutcommit(wdata);
+ dprintk("%s ionde %lu pls_end_pos %lu\n", __func__, wdata->inode->i_ino,
+ (unsigned long) wdata->lseg->pls_end_pos);
+}
+
+/*
* Call ops for the async read/write cases
* In the case of dense layouts, the offset needs to be reset to its
* original value.
@@ -210,6 +227,38 @@ static int filelayout_write_done_cb(struct rpc_task *task,
return -EAGAIN;
}
+ filelayout_set_layoutcommit(data);
+ return 0;
+}
+
+/* Fake up some data that will cause nfs_commit_release to retry the writes. */
+static void prepare_to_resend_writes(struct nfs_write_data *data)
+{
+ struct nfs_page *first = nfs_list_entry(data->pages.next);
+
+ data->task.tk_status = 0;
+ memcpy(data->verf.verifier, first->wb_verf.verifier,
+ sizeof(first->wb_verf.verifier));
+ data->verf.verifier[0]++; /* ensure verifier mismatch */
+}
+
+static int filelayout_commit_done_cb(struct rpc_task *task,
+ struct nfs_write_data *data)
+{
+ int reset = 0;
+
+ if (filelayout_async_handle_error(task, data->args.context->state,
+ data->ds_clp, &reset) == -EAGAIN) {
+ dprintk("%s calling restart ds_clp %p ds_clp->cl_session %p\n",
+ __func__, data->ds_clp, data->ds_clp->cl_session);
+ if (reset) {
+ prepare_to_resend_writes(data);
+ filelayout_set_lo_fail(data->lseg);
+ } else
+ nfs_restart_rpc(task, data->ds_clp);
+ return -EAGAIN;
+ }
+
return 0;
}
@@ -240,6 +289,16 @@ static void filelayout_write_release(void *data)
wdata->mds_ops->rpc_release(data);
}
+static void filelayout_commit_release(void *data)
+{
+ struct nfs_write_data *wdata = (struct nfs_write_data *)data;
+
+ nfs_commit_release_pages(wdata);
+ if (atomic_dec_and_test(&NFS_I(wdata->inode)->commits_outstanding))
+ nfs_commit_clear_lock(NFS_I(wdata->inode));
+ nfs_commitdata_release(wdata);
+}
+
struct rpc_call_ops filelayout_read_call_ops = {
.rpc_call_prepare = filelayout_read_prepare,
.rpc_call_done = filelayout_read_call_done,
@@ -252,6 +311,12 @@ struct rpc_call_ops filelayout_write_call_ops = {
.rpc_release = filelayout_write_release,
};
+struct rpc_call_ops filelayout_commit_call_ops = {
+ .rpc_call_prepare = filelayout_write_prepare,
+ .rpc_call_done = filelayout_write_call_done,
+ .rpc_release = filelayout_commit_release,
+};
+
static enum pnfs_try_status
filelayout_read_pagelist(struct nfs_read_data *data)
{
@@ -320,10 +385,6 @@ filelayout_write_pagelist(struct nfs_write_data *data, int sync)
data->inode->i_ino, sync, (size_t) data->args.count, offset,
ntohl(ds->ds_ip_addr), ntohs(ds->ds_port));
- /* We can't handle commit to ds yet */
- if (!FILELAYOUT_LSEG(lseg)->commit_through_mds)
- data->args.stable = NFS_FILE_SYNC;
-
data->write_done_cb = filelayout_write_done_cb;
data->ds_clp = ds->ds_clp;
fh = nfs4_fl_select_ds_fh(lseg, j);
@@ -441,12 +502,33 @@ filelayout_decode_layout(struct pnfs_layout_hdr *flo,
struct nfs4_layoutget_res *lgr,
struct nfs4_deviceid *id)
{
- uint32_t *p = (uint32_t *)lgr->layout.buf;
+ struct xdr_stream stream;
+ struct xdr_buf buf = {
+ .pages = lgr->layoutp->pages,
+ .page_len = lgr->layoutp->len,
+ .buflen = lgr->layoutp->len,
+ .len = lgr->layoutp->len,
+ };
+ struct page *scratch;
+ __be32 *p;
uint32_t nfl_util;
int i;
dprintk("%s: set_layout_map Begin\n", __func__);
+ scratch = alloc_page(GFP_KERNEL);
+ if (!scratch)
+ return -ENOMEM;
+
+ xdr_init_decode(&stream, &buf, NULL);
+ xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+
+ /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8),
+ * num_fh (4) */
+ p = xdr_inline_decode(&stream, NFS4_DEVICEID4_SIZE + 20);
+ if (unlikely(!p))
+ goto out_err;
+
memcpy(id, p, sizeof(*id));
p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
print_deviceid(id);
@@ -468,32 +550,57 @@ filelayout_decode_layout(struct pnfs_layout_hdr *flo,
__func__, nfl_util, fl->num_fh, fl->first_stripe_index,
fl->pattern_offset);
+ if (!fl->num_fh)
+ goto out_err;
+
fl->fh_array = kzalloc(fl->num_fh * sizeof(struct nfs_fh *),
GFP_KERNEL);
if (!fl->fh_array)
- return -ENOMEM;
+ goto out_err;
for (i = 0; i < fl->num_fh; i++) {
/* Do we want to use a mempool here? */
fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), GFP_KERNEL);
- if (!fl->fh_array[i]) {
- filelayout_free_fh_array(fl);
- return -ENOMEM;
- }
+ if (!fl->fh_array[i])
+ goto out_err_free;
+
+ p = xdr_inline_decode(&stream, 4);
+ if (unlikely(!p))
+ goto out_err_free;
fl->fh_array[i]->size = be32_to_cpup(p++);
if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) {
printk(KERN_ERR "Too big fh %d received %d\n",
i, fl->fh_array[i]->size);
- filelayout_free_fh_array(fl);
- return -EIO;
+ goto out_err_free;
}
+
+ p = xdr_inline_decode(&stream, fl->fh_array[i]->size);
+ if (unlikely(!p))
+ goto out_err_free;
memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size);
- p += XDR_QUADLEN(fl->fh_array[i]->size);
dprintk("DEBUG: %s: fh len %d\n", __func__,
fl->fh_array[i]->size);
}
+ __free_page(scratch);
return 0;
+
+out_err_free:
+ filelayout_free_fh_array(fl);
+out_err:
+ __free_page(scratch);
+ return -EIO;
+}
+
+static void
+filelayout_free_lseg(struct pnfs_layout_segment *lseg)
+{
+ struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
+
+ dprintk("--> %s\n", __func__);
+ nfs4_fl_put_deviceid(fl->dsaddr);
+ kfree(fl->commit_buckets);
+ _filelayout_free_lseg(fl);
}
static struct pnfs_layout_segment *
@@ -514,17 +621,28 @@ filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid,
_filelayout_free_lseg(fl);
return NULL;
}
- return &fl->generic_hdr;
-}
-static void
-filelayout_free_lseg(struct pnfs_layout_segment *lseg)
-{
- struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
-
- dprintk("--> %s\n", __func__);
- nfs4_fl_put_deviceid(fl->dsaddr);
- _filelayout_free_lseg(fl);
+ /* This assumes there is only one IOMODE_RW lseg. What
+ * we really want to do is have a layout_hdr level
+ * dictionary of <multipath_list4, fh> keys, each
+ * associated with a struct list_head, populated by calls
+ * to filelayout_write_pagelist().
+ * */
+ if ((!fl->commit_through_mds) && (lgr->range.iomode == IOMODE_RW)) {
+ int i;
+ int size = (fl->stripe_type == STRIPE_SPARSE) ?
+ fl->dsaddr->ds_num : fl->dsaddr->stripe_count;
+
+ fl->commit_buckets = kcalloc(size, sizeof(struct list_head), GFP_KERNEL);
+ if (!fl->commit_buckets) {
+ filelayout_free_lseg(&fl->generic_hdr);
+ return NULL;
+ }
+ fl->number_of_buckets = size;
+ for (i = 0; i < size; i++)
+ INIT_LIST_HEAD(&fl->commit_buckets[i]);
+ }
+ return &fl->generic_hdr;
}
/*
@@ -552,6 +670,191 @@ filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
return (p_stripe == r_stripe);
}
+static bool filelayout_mark_pnfs_commit(struct pnfs_layout_segment *lseg)
+{
+ return !FILELAYOUT_LSEG(lseg)->commit_through_mds;
+}
+
+static u32 select_bucket_index(struct nfs4_filelayout_segment *fl, u32 j)
+{
+ if (fl->stripe_type == STRIPE_SPARSE)
+ return nfs4_fl_calc_ds_index(&fl->generic_hdr, j);
+ else
+ return j;
+}
+
+struct list_head *filelayout_choose_commit_list(struct nfs_page *req)
+{
+ struct pnfs_layout_segment *lseg = req->wb_commit_lseg;
+ struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
+ u32 i, j;
+ struct list_head *list;
+
+ /* Note that we are calling nfs4_fl_calc_j_index on each page
+ * that ends up being committed to a data server. An attractive
+ * alternative is to add a field to nfs_write_data and nfs_page
+ * to store the value calculated in filelayout_write_pagelist
+ * and just use that here.
+ */
+ j = nfs4_fl_calc_j_index(lseg,
+ (loff_t)req->wb_index << PAGE_CACHE_SHIFT);
+ i = select_bucket_index(fl, j);
+ list = &fl->commit_buckets[i];
+ if (list_empty(list)) {
+ /* Non-empty buckets hold a reference on the lseg */
+ get_lseg(lseg);
+ }
+ return list;
+}
+
+static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
+{
+ struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
+
+ if (flseg->stripe_type == STRIPE_SPARSE)
+ return i;
+ else
+ return nfs4_fl_calc_ds_index(lseg, i);
+}
+
+static struct nfs_fh *
+select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
+{
+ struct nfs4_filelayout_segment *flseg = FILELAYOUT_LSEG(lseg);
+
+ if (flseg->stripe_type == STRIPE_SPARSE) {
+ if (flseg->num_fh == 1)
+ i = 0;
+ else if (flseg->num_fh == 0)
+ /* Use the MDS OPEN fh set in nfs_read_rpcsetup */
+ return NULL;
+ }
+ return flseg->fh_array[i];
+}
+
+static int filelayout_initiate_commit(struct nfs_write_data *data, int how)
+{
+ struct pnfs_layout_segment *lseg = data->lseg;
+ struct nfs4_pnfs_ds *ds;
+ u32 idx;
+ struct nfs_fh *fh;
+
+ idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
+ ds = nfs4_fl_prepare_ds(lseg, idx);
+ if (!ds) {
+ printk(KERN_ERR "%s: prepare_ds failed, use MDS\n", __func__);
+ set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags);
+ set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
+ prepare_to_resend_writes(data);
+ data->mds_ops->rpc_release(data);
+ return -EAGAIN;
+ }
+ dprintk("%s ino %lu, how %d\n", __func__, data->inode->i_ino, how);
+ data->write_done_cb = filelayout_commit_done_cb;
+ data->ds_clp = ds->ds_clp;
+ fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
+ if (fh)
+ data->args.fh = fh;
+ return nfs_initiate_commit(data, ds->ds_clp->cl_rpcclient,
+ &filelayout_commit_call_ops, how);
+}
+
+/*
+ * This is only useful while we are using whole file layouts.
+ */
+static struct pnfs_layout_segment *find_only_write_lseg(struct inode *inode)
+{
+ struct pnfs_layout_segment *lseg, *rv = NULL;
+
+ spin_lock(&inode->i_lock);
+ list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list)
+ if (lseg->pls_range.iomode == IOMODE_RW)
+ rv = get_lseg(lseg);
+ spin_unlock(&inode->i_lock);
+ return rv;
+}
+
+static int alloc_ds_commits(struct inode *inode, struct list_head *list)
+{
+ struct pnfs_layout_segment *lseg;
+ struct nfs4_filelayout_segment *fl;
+ struct nfs_write_data *data;
+ int i, j;
+
+ /* Won't need this when non-whole file layout segments are supported
+ * instead we will use a pnfs_layout_hdr structure */
+ lseg = find_only_write_lseg(inode);
+ if (!lseg)
+ return 0;
+ fl = FILELAYOUT_LSEG(lseg);
+ for (i = 0; i < fl->number_of_buckets; i++) {
+ if (list_empty(&fl->commit_buckets[i]))
+ continue;
+ data = nfs_commitdata_alloc();
+ if (!data)
+ goto out_bad;
+ data->ds_commit_index = i;
+ data->lseg = lseg;
+ list_add(&data->pages, list);
+ }
+ put_lseg(lseg);
+ return 0;
+
+out_bad:
+ for (j = i; j < fl->number_of_buckets; j++) {
+ if (list_empty(&fl->commit_buckets[i]))
+ continue;
+ nfs_retry_commit(&fl->commit_buckets[i], lseg);
+ put_lseg(lseg); /* associated with emptying bucket */
+ }
+ put_lseg(lseg);
+ /* Caller will clean up entries put on list */
+ return -ENOMEM;
+}
+
+/* This follows nfs_commit_list pretty closely */
+static int
+filelayout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
+ int how)
+{
+ struct nfs_write_data *data, *tmp;
+ LIST_HEAD(list);
+
+ if (!list_empty(mds_pages)) {
+ data = nfs_commitdata_alloc();
+ if (!data)
+ goto out_bad;
+ data->lseg = NULL;
+ list_add(&data->pages, &list);
+ }
+
+ if (alloc_ds_commits(inode, &list))
+ goto out_bad;
+
+ list_for_each_entry_safe(data, tmp, &list, pages) {
+ list_del_init(&data->pages);
+ atomic_inc(&NFS_I(inode)->commits_outstanding);
+ if (!data->lseg) {
+ nfs_init_commit(data, mds_pages, NULL);
+ nfs_initiate_commit(data, NFS_CLIENT(inode),
+ data->mds_ops, how);
+ } else {
+ nfs_init_commit(data, &FILELAYOUT_LSEG(data->lseg)->commit_buckets[data->ds_commit_index], data->lseg);
+ filelayout_initiate_commit(data, how);
+ }
+ }
+ return 0;
+ out_bad:
+ list_for_each_entry_safe(data, tmp, &list, pages) {
+ nfs_retry_commit(&data->pages, data->lseg);
+ list_del_init(&data->pages);
+ nfs_commit_free(data);
+ }
+ nfs_retry_commit(mds_pages, NULL);
+ nfs_commit_clear_lock(NFS_I(inode));
+ return -ENOMEM;
+}
+
static struct pnfs_layoutdriver_type filelayout_type = {
.id = LAYOUT_NFSV4_1_FILES,
.name = "LAYOUT_NFSV4_1_FILES",
@@ -559,6 +862,9 @@ static struct pnfs_layoutdriver_type filelayout_type = {
.alloc_lseg = filelayout_alloc_lseg,
.free_lseg = filelayout_free_lseg,
.pg_test = filelayout_pg_test,
+ .mark_pnfs_commit = filelayout_mark_pnfs_commit,
+ .choose_commit_list = filelayout_choose_commit_list,
+ .commit_pagelist = filelayout_commit_pagelist,
.read_pagelist = filelayout_read_pagelist,
.write_pagelist = filelayout_write_pagelist,
};
diff --git a/fs/nfs/nfs4filelayout.h b/fs/nfs/nfs4filelayout.h
index ee0c907742b..085a354e0f0 100644
--- a/fs/nfs/nfs4filelayout.h
+++ b/fs/nfs/nfs4filelayout.h
@@ -79,6 +79,8 @@ struct nfs4_filelayout_segment {
struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */
unsigned int num_fh;
struct nfs_fh **fh_array;
+ struct list_head *commit_buckets; /* Sort commits to ds */
+ int number_of_buckets;
};
static inline struct nfs4_filelayout_segment *
diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c
index 68143c162e3..de5350f2b24 100644
--- a/fs/nfs/nfs4filelayoutdev.c
+++ b/fs/nfs/nfs4filelayoutdev.c
@@ -261,7 +261,7 @@ out:
* Currently only support ipv4, and one multi-path address.
*/
static struct nfs4_pnfs_ds *
-decode_and_add_ds(__be32 **pp, struct inode *inode)
+decode_and_add_ds(struct xdr_stream *streamp, struct inode *inode)
{
struct nfs4_pnfs_ds *ds = NULL;
char *buf;
@@ -269,25 +269,34 @@ decode_and_add_ds(__be32 **pp, struct inode *inode)
u32 ip_addr, port;
int nlen, rlen, i;
int tmp[2];
- __be32 *r_netid, *r_addr, *p = *pp;
+ __be32 *p;
/* r_netid */
+ p = xdr_inline_decode(streamp, 4);
+ if (unlikely(!p))
+ goto out_err;
nlen = be32_to_cpup(p++);
- r_netid = p;
- p += XDR_QUADLEN(nlen);
- /* r_addr */
- rlen = be32_to_cpup(p++);
- r_addr = p;
- p += XDR_QUADLEN(rlen);
- *pp = p;
+ p = xdr_inline_decode(streamp, nlen);
+ if (unlikely(!p))
+ goto out_err;
/* Check that netid is "tcp" */
- if (nlen != 3 || memcmp((char *)r_netid, "tcp", 3)) {
+ if (nlen != 3 || memcmp((char *)p, "tcp", 3)) {
dprintk("%s: ERROR: non ipv4 TCP r_netid\n", __func__);
goto out_err;
}
+ /* r_addr */
+ p = xdr_inline_decode(streamp, 4);
+ if (unlikely(!p))
+ goto out_err;
+ rlen = be32_to_cpup(p);
+
+ p = xdr_inline_decode(streamp, rlen);
+ if (unlikely(!p))
+ goto out_err;
+
/* ipv6 length plus port is legal */
if (rlen > INET6_ADDRSTRLEN + 8) {
dprintk("%s: Invalid address, length %d\n", __func__,
@@ -300,7 +309,7 @@ decode_and_add_ds(__be32 **pp, struct inode *inode)
goto out_err;
}
buf[rlen] = '\0';
- memcpy(buf, r_addr, rlen);
+ memcpy(buf, p, rlen);
/* replace the port dots with dashes for the in4_pton() delimiter*/
for (i = 0; i < 2; i++) {
@@ -336,90 +345,154 @@ out_err:
static struct nfs4_file_layout_dsaddr*
decode_device(struct inode *ino, struct pnfs_device *pdev)
{
- int i, dummy;
+ int i;
u32 cnt, num;
u8 *indexp;
- __be32 *p = (__be32 *)pdev->area, *indicesp;
- struct nfs4_file_layout_dsaddr *dsaddr;
+ __be32 *p;
+ u8 *stripe_indices;
+ u8 max_stripe_index;
+ struct nfs4_file_layout_dsaddr *dsaddr = NULL;
+ struct xdr_stream stream;
+ struct xdr_buf buf = {
+ .pages = pdev->pages,
+ .page_len = pdev->pglen,
+ .buflen = pdev->pglen,
+ .len = pdev->pglen,
+ };
+ struct page *scratch;
+
+ /* set up xdr stream */
+ scratch = alloc_page(GFP_KERNEL);
+ if (!scratch)
+ goto out_err;
+
+ xdr_init_decode(&stream, &buf, NULL);
+ xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
/* Get the stripe count (number of stripe index) */
- cnt = be32_to_cpup(p++);
+ p = xdr_inline_decode(&stream, 4);
+ if (unlikely(!p))
+ goto out_err_free_scratch;
+
+ cnt = be32_to_cpup(p);
dprintk("%s stripe count %d\n", __func__, cnt);
if (cnt > NFS4_PNFS_MAX_STRIPE_CNT) {
printk(KERN_WARNING "%s: stripe count %d greater than "
"supported maximum %d\n", __func__,
cnt, NFS4_PNFS_MAX_STRIPE_CNT);
- goto out_err;
+ goto out_err_free_scratch;
+ }
+
+ /* read stripe indices */
+ stripe_indices = kcalloc(cnt, sizeof(u8), GFP_KERNEL);
+ if (!stripe_indices)
+ goto out_err_free_scratch;
+
+ p = xdr_inline_decode(&stream, cnt << 2);
+ if (unlikely(!p))
+ goto out_err_free_stripe_indices;
+
+ indexp = &stripe_indices[0];
+ max_stripe_index = 0;
+ for (i = 0; i < cnt; i++) {
+ *indexp = be32_to_cpup(p++);
+ max_stripe_index = max(max_stripe_index, *indexp);
+ indexp++;
}
/* Check the multipath list count */
- indicesp = p;
- p += XDR_QUADLEN(cnt << 2);
- num = be32_to_cpup(p++);
+ p = xdr_inline_decode(&stream, 4);
+ if (unlikely(!p))
+ goto out_err_free_stripe_indices;
+
+ num = be32_to_cpup(p);
dprintk("%s ds_num %u\n", __func__, num);
if (num > NFS4_PNFS_MAX_MULTI_CNT) {
printk(KERN_WARNING "%s: multipath count %d greater than "
"supported maximum %d\n", __func__,
num, NFS4_PNFS_MAX_MULTI_CNT);
- goto out_err;
+ goto out_err_free_stripe_indices;
}
+
+ /* validate stripe indices are all < num */
+ if (max_stripe_index >= num) {
+ printk(KERN_WARNING "%s: stripe index %u >= num ds %u\n",
+ __func__, max_stripe_index, num);
+ goto out_err_free_stripe_indices;
+ }
+
dsaddr = kzalloc(sizeof(*dsaddr) +
(sizeof(struct nfs4_pnfs_ds *) * (num - 1)),
GFP_KERNEL);
if (!dsaddr)
- goto out_err;
-
- dsaddr->stripe_indices = kzalloc(sizeof(u8) * cnt, GFP_KERNEL);
- if (!dsaddr->stripe_indices)
- goto out_err_free;
+ goto out_err_free_stripe_indices;
dsaddr->stripe_count = cnt;
+ dsaddr->stripe_indices = stripe_indices;
+ stripe_indices = NULL;
dsaddr->ds_num = num;
memcpy(&dsaddr->deviceid, &pdev->dev_id, sizeof(pdev->dev_id));
- /* Go back an read stripe indices */
- p = indicesp;
- indexp = &dsaddr->stripe_indices[0];
- for (i = 0; i < dsaddr->stripe_count; i++) {
- *indexp = be32_to_cpup(p++);
- if (*indexp >= num)
- goto out_err_free;
- indexp++;
- }
- /* Skip already read multipath list count */
- p++;
-
for (i = 0; i < dsaddr->ds_num; i++) {
int j;
+ u32 mp_count;
+
+ p = xdr_inline_decode(&stream, 4);
+ if (unlikely(!p))
+ goto out_err_free_deviceid;
- dummy = be32_to_cpup(p++); /* multipath count */
- if (dummy > 1) {
+ mp_count = be32_to_cpup(p); /* multipath count */
+ if (mp_count > 1) {
printk(KERN_WARNING
"%s: Multipath count %d not supported, "