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authorRaghavendra G <rgowdapp@redhat.com>2014-07-17 21:59:26 +0530
committerVijay Bellur <vbellur@redhat.com>2014-07-30 02:17:52 -0700
commit45fbf99cb669e891a84a8228cef27973f5e774bf (patch)
treefdb9dd498c21045f787b8db68bfdea40d3c2f509 /xlators/storage/posix
parentb56719fc478590815b6b8bc1e5a7dee5194555df (diff)
storage/posix: removing deleting entries in case of creation failures
The code is not atomic enough to not to delete a dentry created by a prallel dentry creation operation. Change-Id: I9bd6d2aa9e7a1c0688c0a937b02a4b4f56d7aa3d BUG: 1117851 Signed-off-by: Raghavendra G <rgowdapp@redhat.com> Reviewed-on: http://review.gluster.org/8327 Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/storage/posix')
-rw-r--r--xlators/storage/posix/src/posix-handle.c2
-rw-r--r--xlators/storage/posix/src/posix-helpers.c18
-rw-r--r--xlators/storage/posix/src/posix.c108
-rw-r--r--xlators/storage/posix/src/posix.h4
4 files changed, 91 insertions, 41 deletions
diff --git a/xlators/storage/posix/src/posix-handle.c b/xlators/storage/posix/src/posix-handle.c
index b6cfbd0..48ca77d 100644
--- a/xlators/storage/posix/src/posix-handle.c
+++ b/xlators/storage/posix/src/posix-handle.c
@@ -801,7 +801,7 @@ posix_handle_soft (xlator_t *this, const char *real_path, loc_t *loc,
}
-static int
+int
posix_handle_unset_gfid (xlator_t *this, uuid_t gfid)
{
char *path = NULL;
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index 9ba95bc..5f8984c 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -654,6 +654,24 @@ out:
return xattr;
}
+void
+posix_gfid_unset (xlator_t *this, dict_t *xdata)
+{
+ uuid_t uuid = {0, };
+ int ret = 0;
+
+ if (xdata == NULL)
+ goto out;
+
+ ret = dict_get_ptr (xdata, "gfid-req", (void **)&uuid);
+ if (ret) {
+ goto out;
+ }
+
+ posix_handle_unset (this, uuid, NULL);
+out:
+ return;
+}
int
posix_gfid_set (xlator_t *this, const char *path, loc_t *loc, dict_t *xattr_req)
diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c
index 63b65ed..16188a2 100644
--- a/xlators/storage/posix/src/posix.c
+++ b/xlators/storage/posix/src/posix.c
@@ -1042,7 +1042,6 @@ posix_mknod (call_frame_t *frame, xlator_t *this,
char *real_path = 0;
char *par_path = 0;
struct iatt stbuf = { 0, };
- char was_present = 1;
struct posix_private *priv = NULL;
gid_t gid = 0;
struct iatt preparent = {0,};
@@ -1050,6 +1049,7 @@ posix_mknod (call_frame_t *frame, xlator_t *this,
void * uuid_req = NULL;
int32_t nlink_samepgfid = 0;
char *pgfid_xattr_key = NULL;
+ gf_boolean_t entry_created = _gf_false, gfid_set = _gf_false;
DECLARE_OLD_FS_ID_VAR;
@@ -1127,10 +1127,14 @@ real_op:
}
}
+ entry_created = _gf_true;
+
op_ret = posix_gfid_set (this, real_path, loc, xdata);
if (op_ret) {
gf_log (this->name, GF_LOG_ERROR,
"setting gfid on %s failed", real_path);
+ } else {
+ gfid_set = _gf_true;
}
#ifndef HAVE_SET_FSID
@@ -1196,28 +1200,35 @@ out:
(loc)?loc->inode:NULL, &stbuf, &preparent,
&postparent, NULL);
- if ((op_ret == -1) && (!was_present)) {
- unlink (real_path);
+ if (op_ret < 0) {
+ if (entry_created) {
+ if (S_ISREG (mode))
+ sys_unlink (real_path);
+ else
+ sys_rmdir (real_path);
+ }
+
+ if (gfid_set)
+ posix_gfid_unset (this, xdata);
}
return 0;
}
-
int
posix_mkdir (call_frame_t *frame, xlator_t *this,
loc_t *loc, mode_t mode, mode_t umask, dict_t *xdata)
{
- int32_t op_ret = -1;
- int32_t op_errno = 0;
- char *real_path = NULL;
- char *par_path = NULL;
- struct iatt stbuf = {0, };
- char was_present = 1;
- struct posix_private *priv = NULL;
- gid_t gid = 0;
- struct iatt preparent = {0,};
- struct iatt postparent = {0,};
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+ char *real_path = NULL;
+ char *par_path = NULL;
+ struct iatt stbuf = {0, };
+ struct posix_private *priv = NULL;
+ gid_t gid = 0;
+ struct iatt preparent = {0,};
+ struct iatt postparent = {0,};
+ gf_boolean_t entry_created = _gf_false, gfid_set = _gf_false;
DECLARE_OLD_FS_ID_VAR;
@@ -1245,9 +1256,6 @@ posix_mkdir (call_frame_t *frame, xlator_t *this,
gid = frame->root->gid;
op_ret = posix_pstat (this, NULL, real_path, &stbuf);
- if ((op_ret == -1) && (errno == ENOENT)) {
- was_present = 0;
- }
SET_FS_ID (frame->root->uid, gid);
@@ -1274,10 +1282,14 @@ posix_mkdir (call_frame_t *frame, xlator_t *this,
goto out;
}
+ entry_created = _gf_true;
+
op_ret = posix_gfid_set (this, real_path, loc, xdata);
if (op_ret) {
gf_log (this->name, GF_LOG_ERROR,
"setting gfid on %s failed", real_path);
+ } else {
+ gfid_set = _gf_true;
}
#ifndef HAVE_SET_FSID
@@ -1331,8 +1343,12 @@ out:
(loc)?loc->inode:NULL, &stbuf, &preparent,
&postparent, NULL);
- if ((op_ret == -1) && (!was_present)) {
- unlink (real_path);
+ if (op_ret < 0) {
+ if (entry_created)
+ sys_rmdir (real_path);
+
+ if (gfid_set)
+ posix_gfid_unset (this, xdata);
}
return 0;
@@ -1613,11 +1629,11 @@ posix_symlink (call_frame_t *frame, xlator_t *this,
struct iatt stbuf = { 0, };
struct posix_private *priv = NULL;
gid_t gid = 0;
- char was_present = 1;
struct iatt preparent = {0,};
struct iatt postparent = {0,};
char *pgfid_xattr_key = NULL;
int32_t nlink_samepgfid = 0;
+ gf_boolean_t entry_created = _gf_false, gfid_set = _gf_false;
DECLARE_OLD_FS_ID_VAR;
@@ -1631,10 +1647,6 @@ posix_symlink (call_frame_t *frame, xlator_t *this,
MAKE_ENTRY_HANDLE (real_path, par_path, this, loc, &stbuf);
- if ((op_ret == -1) && (errno == ENOENT)){
- was_present = 0;
- }
-
SET_FS_ID (frame->root->uid, gid);
gid = frame->root->gid;
@@ -1662,10 +1674,14 @@ posix_symlink (call_frame_t *frame, xlator_t *this,
goto out;
}
+ entry_created = _gf_true;
+
op_ret = posix_gfid_set (this, real_path, loc, xdata);
if (op_ret) {
gf_log (this->name, GF_LOG_ERROR,
"setting gfid on %s failed", real_path);
+ } else {
+ gfid_set = _gf_true;
}
#ifndef HAVE_SET_FSID
@@ -1727,8 +1743,12 @@ out:
(loc)?loc->inode:NULL, &stbuf, &preparent,
&postparent, NULL);
- if ((op_ret == -1) && (!was_present)) {
- unlink (real_path);
+ if (op_ret < 0) {
+ if (entry_created)
+ sys_unlink (real_path);
+
+ if (gfid_set)
+ posix_gfid_unset (this, xdata);
}
return 0;
@@ -1932,10 +1952,6 @@ out:
&preoldparent, &postoldparent,
&prenewparent, &postnewparent, NULL);
- if ((op_ret == -1) && !was_present) {
- unlink (real_newpath);
- }
-
return 0;
}
@@ -1951,11 +1967,11 @@ posix_link (call_frame_t *frame, xlator_t *this,
char *par_newpath = 0;
struct iatt stbuf = {0, };
struct posix_private *priv = NULL;
- char was_present = 1;
struct iatt preparent = {0,};
struct iatt postparent = {0,};
int32_t nlink_samepgfid = 0;
char *pgfid_xattr_key = NULL;
+ gf_boolean_t entry_created = _gf_false;
DECLARE_OLD_FS_ID_VAR;
@@ -1971,9 +1987,6 @@ posix_link (call_frame_t *frame, xlator_t *this,
MAKE_INODE_HANDLE (real_oldpath, this, oldloc, &stbuf);
MAKE_ENTRY_HANDLE (real_newpath, par_newpath, this, newloc, &stbuf);
- if ((op_ret == -1) && (errno == ENOENT)) {
- was_present = 0;
- }
op_ret = posix_pstat (this, newloc->pargfid, par_newpath, &preparent);
if (op_ret == -1) {
@@ -1994,6 +2007,8 @@ posix_link (call_frame_t *frame, xlator_t *this,
goto out;
}
+ entry_created = _gf_true;
+
op_ret = posix_pstat (this, NULL, real_newpath, &stbuf);
if (op_ret == -1) {
op_errno = errno;
@@ -2041,8 +2056,9 @@ out:
(oldloc)?oldloc->inode:NULL, &stbuf, &preparent,
&postparent, NULL);
- if ((op_ret == -1) && (!was_present)) {
- unlink (real_newpath);
+ if (op_ret < 0) {
+ if (entry_created)
+ sys_unlink (real_newpath);
}
return 0;
@@ -2130,6 +2146,7 @@ posix_create (call_frame_t *frame, xlator_t *this,
int nlink_samepgfid = 0;
char * pgfid_xattr_key = NULL;
+ gf_boolean_t entry_created = _gf_false, gfid_set = _gf_false;
DECLARE_OLD_FS_ID_VAR;
@@ -2187,6 +2204,11 @@ posix_create (call_frame_t *frame, xlator_t *this,
goto out;
}
+ if ((_flags & O_CREAT) && (_flags & O_EXCL)) {
+ entry_created = _gf_true;
+ }
+
+
if (was_present)
goto fill_stat;
@@ -2194,6 +2216,8 @@ posix_create (call_frame_t *frame, xlator_t *this,
if (op_ret) {
gf_log (this->name, GF_LOG_ERROR,
"setting gfid on %s failed", real_path);
+ } else {
+ gfid_set = _gf_true;
}
#ifndef HAVE_SET_FSID
@@ -2274,16 +2298,20 @@ out:
if ((-1 == op_ret) && (_fd != -1)) {
close (_fd);
-
- if (!was_present) {
- unlink (real_path);
- }
}
STACK_UNWIND_STRICT (create, frame, op_ret, op_errno,
fd, (loc)?loc->inode:NULL, &stbuf, &preparent,
&postparent, xdata);
+ if (op_ret < 0) {
+ if (entry_created)
+ sys_unlink (real_path);
+
+ if (gfid_set)
+ posix_gfid_unset (this, xdata);
+ }
+
return 0;
}
diff --git a/xlators/storage/posix/src/posix.h b/xlators/storage/posix/src/posix.h
index aa4a66c..efd52f0 100644
--- a/xlators/storage/posix/src/posix.h
+++ b/xlators/storage/posix/src/posix.h
@@ -228,4 +228,8 @@ int
posix_get_ancestry (xlator_t *this, inode_t *leaf_inode,
gf_dirent_t *head, char **path, int type, int32_t *op_errno,
dict_t *xdata);
+
+void
+posix_gfid_unset (xlator_t *this, dict_t *xdata);
+
#endif /* _POSIX_H */