diff options
| author | NeilBrown <neilb@suse.de> | 2015-05-03 01:16:53 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2015-05-07 17:47:00 +0200 |
| commit | 43b0e7ea590b51052384ecedf4ad7c8d7898e8e7 (patch) | |
| tree | 506113d48acf247d47ec07ee33b31c5332a00087 /fs/nfsd | |
| parent | Documentation: remove overloads-avoided counter from knfsd-stats.txt (diff) | |
| download | linux-43b0e7ea590b51052384ecedf4ad7c8d7898e8e7.tar.xz linux-43b0e7ea590b51052384ecedf4ad7c8d7898e8e7.zip | |
nfsd: stop READDIRPLUS returning inconsistent attributes
The NFSv3 READDIRPLUS gets some of the returned attributes from the
readdir, and some from an inode returned from a new lookup. The two
objects could be different thanks to intervening renames.
The attributes in READDIRPLUS are optional, so let's just skip them if
we notice this case.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs3xdr.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index e4b2b4322553..f6e7cbabac5a 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -805,7 +805,7 @@ encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, static __be32 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, - const char *name, int namlen) + const char *name, int namlen, u64 ino) { struct svc_export *exp; struct dentry *dparent, *dchild; @@ -830,19 +830,21 @@ compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, goto out; if (d_really_is_negative(dchild)) goto out; + if (dchild->d_inode->i_ino != ino) + goto out; rv = fh_compose(fhp, exp, dchild, &cd->fh); out: dput(dchild); return rv; } -static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen) +static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) { struct svc_fh *fh = &cd->scratch; __be32 err; fh_init(fh, NFS3_FHSIZE); - err = compose_entry_fh(cd, fh, name, namlen); + err = compose_entry_fh(cd, fh, name, namlen, ino); if (err) { *p++ = 0; *p++ = 0; @@ -927,7 +929,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, p = encode_entry_baggage(cd, p, name, namlen, ino); if (plus) - p = encode_entryplus_baggage(cd, p, name, namlen); + p = encode_entryplus_baggage(cd, p, name, namlen, ino); num_entry_words = p - cd->buffer; } else if (*(page+1) != NULL) { /* temporarily encode entry into next page, then move back to @@ -941,7 +943,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, p1 = encode_entry_baggage(cd, p1, name, namlen, ino); if (plus) - p1 = encode_entryplus_baggage(cd, p1, name, namlen); + p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); /* determine entry word length and lengths to go in pages */ num_entry_words = p1 - tmp; |