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NFS: Separate tracking of file mode cache validity from the uid/gid 

chown()/chgrp() and chmod() are separate operations, and in addition,
there are mode operations that are performed automatically by the
server. So let's track mode validity separately from the file ownership
validity.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2021-04-13 09:41:16 -04:00
parent fabf2b3415
commit 720869eb19
6 changed files with 30 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/nfs/dir.c
View File

@ -2948,7 +2948,7 @@ static int nfs_execute_ok(struct inode *inode, int mask)
if (S_ISDIR(inode->i_mode))
return 0;
if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_OTHER)) {
if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_MODE)) {
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
ret = __nfs_revalidate_inode(server, inode);
@ -3006,7 +3006,8 @@ out_notsup:
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
res = nfs_revalidate_inode(inode, NFS_INO_INVALID_OTHER);
res = nfs_revalidate_inode(inode, NFS_INO_INVALID_MODE |
NFS_INO_INVALID_OTHER);
if (res == 0)
res = generic_permission(&init_user_ns, inode, mask);
goto out;

18
fs/nfs/inode.c
View File

@ -199,7 +199,8 @@ void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
if (have_delegation) {
if (!(flags & NFS_INO_REVAL_FORCED))
flags &= ~NFS_INO_INVALID_OTHER;
flags &= ~(NFS_INO_INVALID_MODE |
NFS_INO_INVALID_OTHER);
flags &= ~(NFS_INO_INVALID_CHANGE
| NFS_INO_INVALID_SIZE
| NFS_INO_INVALID_XATTR);
@ -472,7 +473,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
nfsi->cache_validity = 0;
if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
&& nfs_server_capable(inode, NFS_CAP_MODE))
nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
/* Why so? Because we want revalidate for devices/FIFOs, and
* that's precisely what we have in nfs_file_inode_operations.
*/
@ -803,8 +804,10 @@ static u32 nfs_get_valid_attrmask(struct inode *inode)
reply_mask |= STATX_SIZE;
if (!(cache_validity & NFS_INO_INVALID_NLINK))
reply_mask |= STATX_NLINK;
if (!(cache_validity & NFS_INO_INVALID_MODE))
reply_mask |= STATX_MODE;
if (!(cache_validity & NFS_INO_INVALID_OTHER))
reply_mask |= STATX_UID | STATX_GID | STATX_MODE;
reply_mask |= STATX_UID | STATX_GID;
if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
reply_mask |= STATX_BLOCKS;
return reply_mask;
@ -872,7 +875,9 @@ int nfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
do_update |= cache_validity & NFS_INO_INVALID_SIZE;
if (request_mask & STATX_NLINK)
do_update |= cache_validity & NFS_INO_INVALID_NLINK;
if (request_mask & (STATX_UID | STATX_GID | STATX_MODE))
if (request_mask & STATX_MODE)
do_update |= cache_validity & NFS_INO_INVALID_MODE;
if (request_mask & (STATX_UID | STATX_GID))
do_update |= cache_validity & NFS_INO_INVALID_OTHER;
if (request_mask & STATX_BLOCKS)
do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
@ -1510,7 +1515,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat
if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
invalid |= NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
| NFS_INO_INVALID_OTHER;
| NFS_INO_INVALID_MODE;
if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
invalid |= NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
@ -1947,6 +1952,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
| NFS_INO_INVALID_SIZE
| NFS_INO_INVALID_BLOCKS
| NFS_INO_INVALID_NLINK
| NFS_INO_INVALID_MODE
| NFS_INO_INVALID_OTHER;
if (S_ISDIR(inode->i_mode))
nfs_force_lookup_revalidate(inode);
@ -2037,7 +2043,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
}
} else if (server->caps & NFS_CAP_MODE) {
nfsi->cache_validity |= save_cache_validity &
(NFS_INO_INVALID_OTHER
(NFS_INO_INVALID_MODE
| NFS_INO_REVAL_FORCED);
cache_revalidated = false;
}

14
fs/nfs/nfs4proc.c
View File

@ -302,9 +302,10 @@ static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
if (!(cache_validity & NFS_INO_INVALID_CHANGE))
dst[0] &= ~FATTR4_WORD0_CHANGE;
if (!(cache_validity & NFS_INO_INVALID_MODE))
dst[1] &= ~FATTR4_WORD1_MODE;
if (!(cache_validity & NFS_INO_INVALID_OTHER))
dst[1] &= ~(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER |
FATTR4_WORD1_OWNER_GROUP);
dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP);
}
static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
@ -3344,7 +3345,9 @@ static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
unsigned long adjust_flags = NFS_INO_INVALID_CHANGE;
int err;
if (sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID))
if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID))
adjust_flags |= NFS_INO_INVALID_MODE;
if (sattr->ia_valid & (ATTR_UID | ATTR_GID))
adjust_flags |= NFS_INO_INVALID_OTHER;
do {
@ -5431,9 +5434,10 @@ static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src,
bitmask[0] |= FATTR4_WORD0_CHANGE;
if (cache_validity & NFS_INO_INVALID_ATIME)
bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
if (cache_validity & NFS_INO_INVALID_MODE)
bitmask[1] |= FATTR4_WORD1_MODE;
if (cache_validity & NFS_INO_INVALID_OTHER)
bitmask[1] |= FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER |
FATTR4_WORD1_OWNER_GROUP;
bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP;
if (cache_validity & NFS_INO_INVALID_NLINK)
bitmask[1] |= FATTR4_WORD1_NUMLINKS;
if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL)

4
fs/nfs/nfstrace.h
View File

@ -49,6 +49,7 @@ TRACE_DEFINE_ENUM(NFS_INO_DATA_INVAL_DEFER);
TRACE_DEFINE_ENUM(NFS_INO_INVALID_BLOCKS);
TRACE_DEFINE_ENUM(NFS_INO_INVALID_XATTR);
TRACE_DEFINE_ENUM(NFS_INO_INVALID_NLINK);
TRACE_DEFINE_ENUM(NFS_INO_INVALID_MODE);
#define nfs_show_cache_validity(v) \
__print_flags(v, "|", \
@ -67,7 +68,8 @@ TRACE_DEFINE_ENUM(NFS_INO_INVALID_NLINK);
{ NFS_INO_DATA_INVAL_DEFER, "DATA_INVAL_DEFER" }, \
{ NFS_INO_INVALID_BLOCKS, "INVALID_BLOCKS" }, \
{ NFS_INO_INVALID_XATTR, "INVALID_XATTR" }, \
{ NFS_INO_INVALID_NLINK, "INVALID_NLINK" })
{ NFS_INO_INVALID_NLINK, "INVALID_NLINK" }, \
{ NFS_INO_INVALID_MODE, "INVALID_MODE" })
TRACE_DEFINE_ENUM(NFS_INO_ADVISE_RDPLUS);
TRACE_DEFINE_ENUM(NFS_INO_STALE);

2
fs/nfs/write.c
View File

@ -1604,7 +1604,7 @@ static int nfs_writeback_done(struct rpc_task *task,
/* Deal with the suid/sgid bit corner case */
if (nfs_should_remove_suid(inode)) {
spin_lock(&inode->i_lock);
nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
spin_unlock(&inode->i_lock);
}
return 0;

2
include/linux/nfs_fs.h
View File

@ -247,12 +247,14 @@ struct nfs4_copy_state {
#define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */
#define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */
#define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */
#define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */
#define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \
| NFS_INO_INVALID_CTIME \
| NFS_INO_INVALID_MTIME \
| NFS_INO_INVALID_SIZE \
| NFS_INO_INVALID_NLINK \
| NFS_INO_INVALID_MODE \
| NFS_INO_INVALID_OTHER) /* inode metadata is invalid */
/*