diff options
| author | Anand Avati <avati@gluster.com> | 2011-07-12 02:10:16 +0000 |
|---|---|---|
| committer | Anand Avati <avati@gluster.com> | 2011-07-12 02:24:57 -0700 |
| commit | a2de8fc7ad0aab1715fb4e0a23e12bfc1595bf88 (patch) | |
| tree | 9bf912587d63696d250614476583c85a31733e58 | |
| parent | 2bf588bfc2eaaa880f73b035670e4e4d47ac36d3 (diff) | |
storage/posix: detect race in posix_rename()
detect a race in rename between two clients by checking for
reassigned gfid or presence of dir when not expecting.
checks not necessary for rename of files.
Signed-off-by: Anand Avati <avati@gluster.com>
BUG: 2522 ([glusterfs-3.1.3qa8]: rm -rf shows invalid argument)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2522
| -rw-r--r-- | xlators/storage/posix/src/posix.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c index fd7f2e27c..f468e3f56 100644 --- a/xlators/storage/posix/src/posix.c +++ b/xlators/storage/posix/src/posix.c @@ -1881,6 +1881,8 @@ posix_rename (call_frame_t *frame, xlator_t *this, struct iatt postoldparent = {0, }; struct iatt prenewparent = {0, }; struct iatt postnewparent = {0, }; + char olddirid[64]; + char newdirid[64]; DECLARE_OLD_FS_ID_VAR; @@ -1931,6 +1933,27 @@ posix_rename (call_frame_t *frame, xlator_t *this, was_present = 0; } + if (was_present && IA_ISDIR(stbuf.ia_type) && !newloc->inode) { + gf_log (this->name, GF_LOG_WARNING, + "found directory at %s while expecting ENOENT", + real_newpath); + op_ret = -1; + op_errno = EEXIST; + goto out; + } + + if (was_present && IA_ISDIR(stbuf.ia_type) && + uuid_compare (newloc->inode->gfid, stbuf.ia_gfid)) { + gf_log (this->name, GF_LOG_WARNING, + "found directory %s at %s while renaming %s", + uuid_utoa_r (newloc->inode->gfid, olddirid), + real_newpath, + uuid_utoa_r (stbuf.ia_gfid, newdirid)); + op_ret = -1; + op_errno = EEXIST; + goto out; + } + op_ret = sys_rename (real_oldpath, real_newpath); if (op_ret == -1) { op_errno = errno; |