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| author | J. Bruce Fields <bfields@redhat.com> | 2011-08-15 16:59:55 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2011-08-26 18:22:47 -0400 |
| commit | 7d818a7b8fc8d26c24ee44ed1c5dece69455a7b6 (patch) | |
| tree | 660675f24b5dcb74630defb9a576d1cba6fb36a8 /fs/nfsd | |
| parent | 3d2544b1e4909b6dffa0d140273628913e255e45 (diff) | |
| download | linux-7d818a7b8fc8d26c24ee44ed1c5dece69455a7b6.tar.gz | |
nfsd: open-code special directory-hardlink check
We allow the fh_verify caller to specify that any object *except* those of a given type is allowed, by passing a negative type. But only one caller actually uses it. Open-code that check in the one caller. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfsfh.c | 9 | ||||
| -rw-r--r-- | fs/nfsd/vfs.c | 6 |
2 files changed, 4 insertions, 11 deletions
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index 90c6aa6d5e0f..8cd49b9bf085 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -61,7 +61,6 @@ static int nfsd_acceptable(void *expv, struct dentry *dentry) static inline __be32 nfsd_mode_check(struct svc_rqst *rqstp, umode_t mode, int type) { - /* Type can be negative when creating hardlinks - not to a dir */ if (type > 0 && (mode & S_IFMT) != type) { if (rqstp->rq_vers == 4 && (mode & S_IFMT) == S_IFLNK) return nfserr_symlink; @@ -72,14 +71,6 @@ nfsd_mode_check(struct svc_rqst *rqstp, umode_t mode, int type) else return nfserr_inval; } - if (type < 0 && (mode & S_IFMT) == -type) { - if (rqstp->rq_vers == 4 && (mode & S_IFMT) == S_IFLNK) - return nfserr_symlink; - else if (type == -S_IFDIR) - return nfserr_isdir; - else - return nfserr_notdir; - } return 0; } diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index fd0acca5370a..0c92a17d1770 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1632,10 +1632,12 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp, err = fh_verify(rqstp, ffhp, S_IFDIR, NFSD_MAY_CREATE); if (err) goto out; - err = fh_verify(rqstp, tfhp, -S_IFDIR, NFSD_MAY_NOP); + err = fh_verify(rqstp, tfhp, 0, NFSD_MAY_NOP); if (err) goto out; - + err = nfserr_isdir; + if (S_ISDIR(tfhp->fh_dentry->d_inode->i_mode)) + goto out; err = nfserr_perm; if (!len) goto out; |