posix: Delete the entry if gfid link creation fails

Problem:
If the gfid link file inside .glusterfs is not present for a file,
the operations which are dependent on the gfid will fail,
complaining the link file does not exists inside .glusterfs.

Fix:
If the link file creation fails, fail the entry creation operation
and delete the original file.

Change-Id: Id767511de2da46b1f45aea45cb68b98d965ac96d
fixes: bz#1612037
Signed-off-by: karthik-us <ksubrahm@redhat.com>

3 files changed, 41 insertions, 14 deletions

diff --git a/xlators/storage/posix/src/posix-entry-ops.c b/xlators/storage/posix/src/posix-entry-ops.c
index cb96d76332a..acda68371d5 100644
--- a/xlators/storage/posix/src/posix-entry-ops.c
+++ b/xlators/storage/posix/src/posix-entry-ops.c
@@ -490,10 +490,13 @@ ignore:
         }
 
         if (!linked) {
-                op_ret = posix_gfid_set (this, real_path, loc, xdata);
+                op_ret = posix_gfid_set (this, real_path, loc, xdata,
+                                         frame->root->pid, &op_errno);
                 if (op_ret) {
-                        gf_msg (this->name, GF_LOG_ERROR, 0, P_MSG_GFID_FAILED,
-                                "setting gfid on %s failed", real_path);
+                        gf_msg (this->name, GF_LOG_ERROR, op_errno,
+                                P_MSG_GFID_FAILED, "setting gfid on %s failed",
+                                real_path);
+                        goto out;
                 } else {
                         gfid_set = _gf_true;
                 }
@@ -812,10 +815,12 @@ posix_mkdir (call_frame_t *frame, xlator_t *this,
                         "setting xattrs on %s failed", real_path);
         }
 
-        op_ret = posix_gfid_set (this, real_path, loc, xdata);
+        op_ret = posix_gfid_set (this, real_path, loc, xdata, frame->root->pid,
+                                 &op_errno);
         if (op_ret) {
-                gf_msg (this->name, GF_LOG_ERROR, 0, P_MSG_GFID_FAILED,
+                gf_msg (this->name, GF_LOG_ERROR, op_errno, P_MSG_GFID_FAILED,
                         "setting gfid on %s failed", real_path);
+                goto out;
         } else {
                 gfid_set = _gf_true;
         }
@@ -1508,10 +1513,12 @@ ignore:
                         "setting xattrs on %s failed ", real_path);
         }
 
-        op_ret = posix_gfid_set (this, real_path, loc, xdata);
+        op_ret = posix_gfid_set (this, real_path, loc, xdata, frame->root->pid,
+                                 &op_errno);
         if (op_ret) {
-                gf_msg (this->name, GF_LOG_ERROR, 0, P_MSG_GFID_FAILED,
+                gf_msg (this->name, GF_LOG_ERROR, op_errno, P_MSG_GFID_FAILED,
                         "setting gfid on %s failed", real_path);
+                goto out;
         } else {
                 gfid_set = _gf_true;
         }
@@ -2164,10 +2171,12 @@ ignore:
         }
 
 fill_stat:
-        op_ret = posix_gfid_set (this, real_path, loc, xdata);
+        op_ret = posix_gfid_set (this, real_path, loc, xdata, frame->root->pid,
+                                 &op_errno);
         if (op_ret) {
-                gf_msg (this->name, GF_LOG_ERROR, 0, P_MSG_GFID_FAILED,
+                gf_msg (this->name, GF_LOG_ERROR, op_errno, P_MSG_GFID_FAILED,
                         "setting gfid on %s failed", real_path);
+                goto out;
         } else {
                 gfid_set = _gf_true;
         }
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index 11265bb802b..d521d80e8aa 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -955,7 +955,8 @@ out:
 }
 
 int
-posix_gfid_set (xlator_t *this, const char *path, loc_t *loc, dict_t *xattr_req)
+posix_gfid_set (xlator_t *this, const char *path, loc_t *loc,
+                dict_t *xattr_req, pid_t pid, int *op_errno)
 {
         uuid_t       uuid_req;
         uuid_t       uuid_curr;
@@ -963,12 +964,24 @@ posix_gfid_set (xlator_t *this, const char *path, loc_t *loc, dict_t *xattr_req)
         ssize_t      size = 0;
         struct stat  stat = {0, };
 
+        *op_errno = 0;
 
-        if (!xattr_req)
+        if (!xattr_req) {
+                if (pid != GF_SERVER_PID_TRASH) {
+                        gf_msg (this->name, GF_LOG_ERROR, EINVAL,
+                                P_MSG_INVALID_ARGUMENT, "xattr_req is null");
+                        *op_errno = EINVAL;
+                        ret = -1;
+                }
                 goto out;
+        }
 
-        if (sys_lstat (path, &stat) != 0)
+        if (sys_lstat (path, &stat) != 0) {
+                ret = -1;
+                gf_msg (this->name, GF_LOG_ERROR, errno,
+                        P_MSG_LSTAT_FAILED, "lsatat on %s failed", path);
                 goto out;
+        }
 
         size = sys_lgetxattr (path, GFID_XATTR_KEY, uuid_curr, 16);
         if (size == 16) {
@@ -981,12 +994,15 @@ posix_gfid_set (xlator_t *this, const char *path, loc_t *loc, dict_t *xattr_req)
                 gf_msg_debug (this->name, 0,
                         "failed to get the gfid from dict for %s",
                         loc->path);
+                *op_errno = -ret;
+                ret = -1;
                 goto out;
         }
         if (gf_uuid_is_null (uuid_req)) {
                 gf_msg (this->name, GF_LOG_ERROR, EINVAL, P_MSG_NULL_GFID,
                         "gfid is null for %s", loc ? loc->path : "");
                 ret = -1;
+                *op_errno = EINVAL;
                 goto out;
         }
 
@@ -1005,6 +1021,8 @@ verify_handle:
                 ret = posix_handle_soft (this, path, loc, uuid_curr, &stat);
 
 out:
+        if (!(*op_errno))
+                *op_errno = errno;
         return ret;
 }
 
@@ -1712,7 +1730,7 @@ posix_gfid_heal (xlator_t *this, const char *path, loc_t *loc, dict_t *xattr_req
                 }
         }
 
-        posix_gfid_set (this, path, loc, xattr_req);
+        posix_gfid_set (this, path, loc, xattr_req, GF_CLIENT_PID_MAX, &ret);
         return 0;
 }
 
diff --git a/xlators/storage/posix/src/posix.h b/xlators/storage/posix/src/posix.h
index a58d510df2e..b53afdf4b59 100644
--- a/xlators/storage/posix/src/posix.h
+++ b/xlators/storage/posix/src/posix.h
@@ -328,7 +328,7 @@ int __posix_inode_ctx_get_all (inode_t *inode, xlator_t *this,
                                posix_inode_ctx_t **ctx);
 
 int posix_gfid_set (xlator_t *this, const char *path, loc_t *loc,
-                    dict_t *xattr_req);
+                    dict_t *xattr_req, pid_t pid, int *op_errno);
 int posix_fdstat (xlator_t *this, inode_t *inode, int fd, struct iatt *stbuf_p);
 int posix_istat (xlator_t *this, inode_t *inode, uuid_t gfid,
                  const char *basename, struct iatt *iatt);