aboutsummaryrefslogtreecommitdiff
path: root/fs/nfs/nfs4xdr.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfs/nfs4xdr.c')
-rw-r--r--fs/nfs/nfs4xdr.c154
1 files changed, 125 insertions, 29 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 727cfe080ea..2a3f77e14db 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -102,12 +102,23 @@ static int nfs4_stat_to_errno(int);
#define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2))
#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
#define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */
+#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN))
+#define encode_readdir_space 24
+#define encode_readdir_bitmask_sz 3
+#else
+#define nfs4_label_maxsz 0
+#define encode_readdir_space 20
+#define encode_readdir_bitmask_sz 2
+#endif
/* We support only one layout type per file system */
#define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8)
/* This is based on getfattr, which uses the most attributes: */
#define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
3 + 3 + 3 + nfs4_owner_maxsz + \
- nfs4_group_maxsz + decode_mdsthreshold_maxsz))
+ nfs4_group_maxsz + nfs4_label_maxsz + \
+ decode_mdsthreshold_maxsz))
#define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \
nfs4_fattr_value_maxsz)
#define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
@@ -115,6 +126,7 @@ static int nfs4_stat_to_errno(int);
1 + 2 + 1 + \
nfs4_owner_maxsz + \
nfs4_group_maxsz + \
+ nfs4_label_maxsz + \
4 + 4)
#define encode_savefh_maxsz (op_encode_hdr_maxsz)
#define decode_savefh_maxsz (op_decode_hdr_maxsz)
@@ -192,9 +204,11 @@ static int nfs4_stat_to_errno(int);
encode_stateid_maxsz + 3)
#define decode_read_maxsz (op_decode_hdr_maxsz + 2)
#define encode_readdir_maxsz (op_encode_hdr_maxsz + \
- 2 + encode_verifier_maxsz + 5)
+ 2 + encode_verifier_maxsz + 5 + \
+ nfs4_label_maxsz)
#define decode_readdir_maxsz (op_decode_hdr_maxsz + \
- decode_verifier_maxsz)
+ decode_verifier_maxsz + \
+ nfs4_label_maxsz + nfs4_fattr_maxsz)
#define encode_readlink_maxsz (op_encode_hdr_maxsz)
#define decode_readlink_maxsz (op_decode_hdr_maxsz + 1)
#define encode_write_maxsz (op_encode_hdr_maxsz + \
@@ -968,7 +982,9 @@ static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *ve
encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE);
}
-static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server)
+static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap,
+ const struct nfs4_label *label,
+ const struct nfs_server *server)
{
char owner_name[IDMAP_NAMESZ];
char owner_group[IDMAP_NAMESZ];
@@ -1018,6 +1034,8 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const
}
len += 4 + (XDR_QUADLEN(owner_grouplen) << 2);
}
+ if (label)
+ len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2);
if (iap->ia_valid & ATTR_ATIME_SET)
len += 16;
else if (iap->ia_valid & ATTR_ATIME)
@@ -1072,6 +1090,13 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const
bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET;
*p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME);
}
+ if (label) {
+ bmval2 |= FATTR4_WORD2_SECURITY_LABEL;
+ *p++ = cpu_to_be32(label->lfs);
+ *p++ = cpu_to_be32(label->pi);
+ *p++ = cpu_to_be32(label->len);
+ p = xdr_encode_opaque_fixed(p, label->label, label->len);
+ }
/*
* Now we backfill the bitmap and the attribute buffer length.
@@ -1138,7 +1163,7 @@ static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg *
}
encode_string(xdr, create->name->len, create->name->name);
- encode_attrs(xdr, create->attrs, create->server);
+ encode_attrs(xdr, create->attrs, create->label, create->server);
}
static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr)
@@ -1371,11 +1396,11 @@ static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_op
switch(arg->createmode) {
case NFS4_CREATE_UNCHECKED:
*p = cpu_to_be32(NFS4_CREATE_UNCHECKED);
- encode_attrs(xdr, arg->u.attrs, arg->server);
+ encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
break;
case NFS4_CREATE_GUARDED:
*p = cpu_to_be32(NFS4_CREATE_GUARDED);
- encode_attrs(xdr, arg->u.attrs, arg->server);
+ encode_attrs(xdr, arg->u.attrs, arg->label, arg->server);
break;
case NFS4_CREATE_EXCLUSIVE:
*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
@@ -1385,7 +1410,7 @@ static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_op
*p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1);
encode_nfs4_verifier(xdr, &arg->u.verifier);
dummy.ia_valid = 0;
- encode_attrs(xdr, &dummy, arg->server);
+ encode_attrs(xdr, &dummy, arg->label, arg->server);
}
}
@@ -1536,7 +1561,7 @@ static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args,
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
{
- uint32_t attrs[2] = {
+ uint32_t attrs[3] = {
FATTR4_WORD0_RDATTR_ERROR,
FATTR4_WORD1_MOUNTED_ON_FILEID,
};
@@ -1559,20 +1584,26 @@ static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg
encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr);
encode_uint64(xdr, readdir->cookie);
encode_nfs4_verifier(xdr, &readdir->verifier);
- p = reserve_space(xdr, 20);
+ p = reserve_space(xdr, encode_readdir_space);
*p++ = cpu_to_be32(dircount);
*p++ = cpu_to_be32(readdir->count);
- *p++ = cpu_to_be32(2);
-
+ *p++ = cpu_to_be32(encode_readdir_bitmask_sz);
*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
- *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
+ *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
+ if (encode_readdir_bitmask_sz > 2) {
+ if (hdr->minorversion > 1)
+ attrs[2] |= FATTR4_WORD2_SECURITY_LABEL;
+ p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]);
+ }
memcpy(verf, readdir->verifier.data, sizeof(verf));
- dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
+
+ dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n",
__func__,
(unsigned long long)readdir->cookie,
verf[0], verf[1],
attrs[0] & readdir->bitmask[0],
- attrs[1] & readdir->bitmask[1]);
+ attrs[1] & readdir->bitmask[1],
+ attrs[2] & readdir->bitmask[2]);
}
static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
@@ -1631,7 +1662,7 @@ static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs
{
encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr);
encode_nfs4_stateid(xdr, &arg->stateid);
- encode_attrs(xdr, arg->iap, server);
+ encode_attrs(xdr, arg->iap, arg->label, server);
}
static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
@@ -4042,6 +4073,56 @@ static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
return status;
}
+static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct nfs4_label *label)
+{
+ uint32_t pi = 0;
+ uint32_t lfs = 0;
+ __u32 len;
+ __be32 *p;
+ int status = 0;
+
+ if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U)))
+ return -EIO;
+ if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ lfs = be32_to_cpup(p++);
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ pi = be32_to_cpup(p++);
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p++);
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (len < NFS4_MAXLABELLEN) {
+ if (label) {
+ memcpy(label->label, p, len);
+ label->len = len;
+ label->pi = pi;
+ label->lfs = lfs;
+ status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
+ }
+ bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ } else
+ printk(KERN_WARNING "%s: label too long (%u)!\n",
+ __func__, len);
+ }
+ if (label && label->label)
+ dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
+ (char *)label->label, label->len, label->pi, label->lfs);
+ return status;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
int status = 0;
@@ -4384,7 +4465,7 @@ out_overflow:
static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
struct nfs_fattr *fattr, struct nfs_fh *fh,
- struct nfs4_fs_locations *fs_loc,
+ struct nfs4_fs_locations *fs_loc, struct nfs4_label *label,
const struct nfs_server *server)
{
int status;
@@ -4492,6 +4573,13 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
if (status < 0)
goto xdr_error;
+ if (label) {
+ status = decode_attr_security_label(xdr, bitmap, label);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+ }
+
xdr_error:
dprintk("%s: xdr returned %d\n", __func__, -status);
return status;
@@ -4499,7 +4587,7 @@ xdr_error:
static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc,
- const struct nfs_server *server)
+ struct nfs4_label *label, const struct nfs_server *server)
{
unsigned int savep;
uint32_t attrlen,
@@ -4518,7 +4606,8 @@ static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fat
if (status < 0)
goto xdr_error;
- status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server);
+ status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc,
+ label, server);
if (status < 0)
goto xdr_error;
@@ -4528,10 +4617,16 @@ xdr_error:
return status;
}
+static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ struct nfs4_label *label, const struct nfs_server *server)
+{
+ return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server);
+}
+
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
const struct nfs_server *server)
{
- return decode_getfattr_generic(xdr, fattr, NULL, NULL, server);
+ return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server);
}
/*
@@ -5923,7 +6018,7 @@ static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
status = decode_getfh(xdr, res->fh);
if (status)
goto out;
- status = decode_getfattr(xdr, res->fattr, res->server);
+ status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
out:
return status;
}
@@ -5949,7 +6044,8 @@ static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp,
goto out;
status = decode_getfh(xdr, res->fh);
if (status == 0)
- status = decode_getfattr(xdr, res->fattr, res->server);
+ status = decode_getfattr_label(xdr, res->fattr,
+ res->label, res->server);
out:
return status;
}
@@ -6040,7 +6136,7 @@ static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
status = decode_restorefh(xdr);
if (status)
goto out;
- decode_getfattr(xdr, res->fattr, res->server);
+ decode_getfattr_label(xdr, res->fattr, res->label, res->server);
out:
return status;
}
@@ -6069,7 +6165,7 @@ static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
status = decode_getfh(xdr, res->fh);
if (status)
goto out;
- decode_getfattr(xdr, res->fattr, res->server);
+ decode_getfattr_label(xdr, res->fattr, res->label, res->server);
out:
return status;
}
@@ -6101,7 +6197,7 @@ static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
status = decode_putfh(xdr);
if (status)
goto out;
- status = decode_getfattr(xdr, res->fattr, res->server);
+ status = decode_getfattr_label(xdr, res->fattr, res->label, res->server);
out:
return status;
}
@@ -6234,7 +6330,7 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
goto out;
if (res->access_request)
decode_access(xdr, &res->access_supported, &res->access_result);
- decode_getfattr(xdr, res->f_attr, res->server);
+ decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server);
out:
return status;
}
@@ -6311,7 +6407,7 @@ static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp,
status = decode_setattr(xdr);
if (status)
goto out;
- decode_getfattr(xdr, res->fattr, res->server);
+ decode_getfattr_label(xdr, res->fattr, res->label, res->server);
out:
return status;
}
@@ -6700,7 +6796,7 @@ static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req,
xdr_enter_page(xdr, PAGE_SIZE);
status = decode_getfattr_generic(xdr, &res->fs_locations->fattr,
NULL, res->fs_locations,
- res->fs_locations->server);
+ NULL, res->fs_locations->server);
out:
return status;
}
@@ -7113,7 +7209,7 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
goto out_overflow;
if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
- NULL, entry->server) < 0)
+ NULL, entry->label, entry->server) < 0)
goto out_overflow;
if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
entry->ino = entry->fattr->mounted_on_fileid;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-21 17:10:14 +0000