gfapi: link inodes in relevant entry FOPs

Do not let inode linking to happen only in lookup(). While
that works, it is inefficient.

Change-Id: I51bbfb6255ec4324ab17ff00566375f49d120c06
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5162
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

4 files changed, 105 insertions, 15 deletions

diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c
index fe230e6a9..0bea82a04 100644
--- a/api/src/glfs-fops.c
+++ b/api/src/glfs-fops.c
@@ -26,6 +26,41 @@
 	}						\
 	} while (0)
 
+
+static int
+glfs_loc_link (loc_t *loc, struct iatt *iatt)
+{
+	int ret = -1;
+	inode_t *linked_inode = NULL;
+
+	if (!loc->inode) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	linked_inode = inode_link (loc->inode, loc->parent, loc->name, iatt);
+	if (linked_inode) {
+		inode_lookup (linked_inode);
+		inode_unref (linked_inode);
+		ret = 0;
+	} else {
+		ret = -1;
+		errno = ENOMEM;
+	}
+
+	return ret;
+}
+
+
+static int
+glfs_loc_unlink (loc_t *loc)
+{
+	inode_unlink (loc->inode, loc->parent, loc->name);
+
+	return 0;
+}
+
+
 struct glfs_fd *
 glfs_open (struct glfs *fs, const char *path, int flags)
 {
@@ -302,9 +337,13 @@ retry:
 		goto out;
 	}
 
-	ret = syncop_create (subvol, &loc, flags, mode, glfd->fd, xattr_req);
+	ret = syncop_create (subvol, &loc, flags, mode, glfd->fd,
+			     xattr_req, &iatt);
 
 	ESTALE_RETRY (ret, errno, reval, &loc, retry);
+
+	if (ret == 0)
+		ret = glfs_loc_link (&loc, &iatt);
 out:
 	loc_wipe (&loc);
 
@@ -998,9 +1037,12 @@ retry:
 		goto out;
 	}
 
-	ret = syncop_symlink (subvol, &loc, data, xattr_req);
+	ret = syncop_symlink (subvol, &loc, data, xattr_req, &iatt);
 
 	ESTALE_RETRY (ret, errno, reval, &loc, retry);
+
+	if (ret == 0)
+		ret = glfs_loc_link (&loc, &iatt);
 out:
 	loc_wipe (&loc);
 
@@ -1115,9 +1157,12 @@ retry:
 		goto out;
 	}
 
-	ret = syncop_mknod (subvol, &loc, mode, dev, xattr_req);
+	ret = syncop_mknod (subvol, &loc, mode, dev, xattr_req, &iatt);
 
 	ESTALE_RETRY (ret, errno, reval, &loc, retry);
+
+	if (ret == 0)
+		ret = glfs_loc_link (&loc, &iatt);
 out:
 	loc_wipe (&loc);
 
@@ -1191,9 +1236,12 @@ retry:
 		goto out;
 	}
 
-	ret = syncop_mkdir (subvol, &loc, mode, xattr_req);
+	ret = syncop_mkdir (subvol, &loc, mode, xattr_req, &iatt);
 
 	ESTALE_RETRY (ret, errno, reval, &loc, retry);
+
+	if (ret == 0)
+		ret = glfs_loc_link (&loc, &iatt);
 out:
 	loc_wipe (&loc);
 
@@ -1238,6 +1286,9 @@ retry:
 	ret = syncop_unlink (subvol, &loc);
 
 	ESTALE_RETRY (ret, errno, reval, &loc, retry);
+
+	if (ret == 0)
+		ret = glfs_loc_unlink (&loc);
 out:
 	loc_wipe (&loc);
 
@@ -1279,6 +1330,9 @@ retry:
 	ret = syncop_rmdir (subvol, &loc);
 
 	ESTALE_RETRY (ret, errno, reval, &loc, retry);
+
+	if (ret == 0)
+		ret = glfs_loc_unlink (&loc);
 out:
 	loc_wipe (&loc);
 
@@ -1341,6 +1395,11 @@ retrynew:
 			goto retry;
 		}
 	}
+
+	if (ret == 0)
+		inode_rename (oldloc.parent->table, oldloc.parent, oldloc.name,
+			      newloc.parent, newloc.name, oldloc.inode,
+			      &oldiatt);
 out:
 	loc_wipe (&oldloc);
 	loc_wipe (&newloc);
@@ -1401,6 +1460,8 @@ retrynew:
 			goto retry;
 	}
 
+	if (ret == 0)
+		ret = glfs_loc_link (&newloc, &oldiatt);
 out:
 	loc_wipe (&oldloc);
 	loc_wipe (&newloc);
@@ -1570,6 +1631,10 @@ glfd_entry_refresh (struct glfs_fd *glfd, int plus)
 		/* spurious errno is dangerous for glfd_entry_next() */
 		errno = 0;
 
+		if (plus)
+			gf_link_inodes_from_dirent (THIS, glfd->fd->inode,
+						    &entries);
+
 		list_splice_init (&glfd->entries, &old.list);
 		list_splice_init (&entries.list, &glfd->entries);
 	}
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c
index 9dbce8d54..ba8c84f26 100644
--- a/libglusterfs/src/syncop.c
+++ b/libglusterfs/src/syncop.c
@@ -1433,6 +1433,9 @@ syncop_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         args->op_ret   = op_ret;
         args->op_errno = op_errno;
 
+	if (buf)
+		args->iatt1 = *buf;
+
         __wake (args);
 
         return 0;
@@ -1440,7 +1443,7 @@ syncop_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int
 syncop_create (xlator_t *subvol, loc_t *loc, int32_t flags, mode_t mode,
-               fd_t *fd, dict_t *xdata)
+               fd_t *fd, dict_t *xdata, struct iatt *iatt)
 {
         struct syncargs args = {0, };
 
@@ -1448,6 +1451,9 @@ syncop_create (xlator_t *subvol, loc_t *loc, int32_t flags, mode_t mode,
                 loc, flags, mode, 0, fd, xdata);
 
         errno = args.op_errno;
+	if (iatt)
+		*iatt = args.iatt1;
+
         return args.op_ret;
 
 }
@@ -1744,6 +1750,8 @@ syncop_symlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
         args->op_ret   = op_ret;
         args->op_errno = op_errno;
+	if (buf)
+		args->iatt1 = *buf;
 
         __wake (args);
 
@@ -1751,7 +1759,8 @@ syncop_symlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 }
 
 int
-syncop_symlink (xlator_t *subvol, loc_t *loc, const char *newpath, dict_t *dict)
+syncop_symlink (xlator_t *subvol, loc_t *loc, const char *newpath, dict_t *dict,
+		struct iatt *iatt)
 {
         struct syncargs args = {0, };
 
@@ -1759,6 +1768,9 @@ syncop_symlink (xlator_t *subvol, loc_t *loc, const char *newpath, dict_t *dict)
                 newpath, loc, 0, dict);
 
         errno = args.op_errno;
+	if (iatt)
+		*iatt = args.iatt1;
+
         return args.op_ret;
 
 }
@@ -1812,6 +1824,9 @@ syncop_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         args->op_ret   = op_ret;
         args->op_errno = op_errno;
 
+	if (buf)
+		args->iatt1 = *buf;
+
         __wake (args);
 
         return 0;
@@ -1819,7 +1834,7 @@ syncop_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int
 syncop_mknod (xlator_t *subvol, loc_t *loc, mode_t mode, dev_t rdev,
-              dict_t *dict)
+              dict_t *dict, struct iatt *iatt)
 {
         struct syncargs args = {0, };
 
@@ -1827,6 +1842,9 @@ syncop_mknod (xlator_t *subvol, loc_t *loc, mode_t mode, dev_t rdev,
                 loc, mode, rdev, 0, dict);
 
         errno = args.op_errno;
+	if (iatt)
+		*iatt = args.iatt1;
+
         return args.op_ret;
 
 }
@@ -1844,6 +1862,8 @@ syncop_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
         args->op_ret   = op_ret;
         args->op_errno = op_errno;
+	if (buf)
+		args->iatt1 = *buf;
 
         __wake (args);
 
@@ -1852,7 +1872,8 @@ syncop_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 
 int
-syncop_mkdir (xlator_t *subvol, loc_t *loc, mode_t mode, dict_t *dict)
+syncop_mkdir (xlator_t *subvol, loc_t *loc, mode_t mode, dict_t *dict,
+	      struct iatt *iatt)
 {
         struct syncargs args = {0, };
 
@@ -1860,6 +1881,9 @@ syncop_mkdir (xlator_t *subvol, loc_t *loc, mode_t mode, dict_t *dict)
                 loc, mode, 0, dict);
 
         errno = args.op_errno;
+	if (iatt)
+		*iatt = args.iatt1;
+
         return args.op_ret;
 
 }
diff --git a/libglusterfs/src/syncop.h b/libglusterfs/src/syncop.h
index 425e077ed..04eb9e5fe 100644
--- a/libglusterfs/src/syncop.h
+++ b/libglusterfs/src/syncop.h
@@ -297,7 +297,7 @@ int syncop_removexattr (xlator_t *subvol, loc_t *loc, const char *name);
 int syncop_fremovexattr (xlator_t *subvol, fd_t *fd, const char *name);
 
 int syncop_create (xlator_t *subvol, loc_t *loc, int32_t flags, mode_t mode,
-                   fd_t *fd, dict_t *dict);
+                   fd_t *fd, dict_t *dict, struct iatt *iatt);
 int syncop_open (xlator_t *subvol, loc_t *loc, int32_t flags, fd_t *fd);
 int syncop_close (fd_t *fd);
 
@@ -323,11 +323,12 @@ int syncop_fstat (xlator_t *subvol, fd_t *fd, struct iatt *stbuf);
 int syncop_stat (xlator_t *subvol, loc_t *loc, struct iatt *stbuf);
 
 int syncop_symlink (xlator_t *subvol, loc_t *loc, const char *newpath,
-                    dict_t *dict);
+                    dict_t *dict, struct iatt *iatt);
 int syncop_readlink (xlator_t *subvol, loc_t *loc, char **buffer, size_t size);
 int syncop_mknod (xlator_t *subvol, loc_t *loc, mode_t mode, dev_t rdev,
-                  dict_t *dict);
-int syncop_mkdir (xlator_t *subvol, loc_t *loc, mode_t mode, dict_t *dict);
+                  dict_t *dict, struct iatt *iatt);
+int syncop_mkdir (xlator_t *subvol, loc_t *loc, mode_t mode, dict_t *dict,
+		  struct iatt *iatt);
 int syncop_link (xlator_t *subvol, loc_t *oldloc, loc_t *newloc);
 int syncop_fsyncdir (xlator_t *subvol, fd_t *fd, int datasync);
 int syncop_access (xlator_t *subvol, loc_t *loc, int32_t mask);
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
index cc3691cc2..78c0340bd 100644
--- a/xlators/cluster/dht/src/dht-rebalance.c
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -292,7 +292,7 @@ __dht_rebalance_create_dst_file (xlator_t *to, xlator_t *from, loc_t *loc, struc
         /* Create the destination with LINKFILE mode, and linkto xattr,
            if the linkfile already exists, it will just open the file */
         ret = syncop_create (to, loc, O_RDWR, DHT_LINKFILE_MODE, fd,
-                             dict);
+                             dict, &new_stbuf);
         if (ret < 0) {
                 gf_log (this->name, GF_LOG_ERROR,
                         "failed to create %s on %s (%s)",
@@ -587,7 +587,7 @@ migrate_special_files (xlator_t *this, xlator_t *from, xlator_t *to, loc_t *loc,
                         goto out;
                 }
 
-                ret = syncop_symlink (to, loc, link, dict);
+                ret = syncop_symlink (to, loc, link, dict, 0);
                 if (ret) {
                         gf_log (this->name, GF_LOG_WARNING,
                                 "%s: creating symlink failed (%s)",
@@ -601,7 +601,7 @@ migrate_special_files (xlator_t *this, xlator_t *from, xlator_t *to, loc_t *loc,
         ret = syncop_mknod (to, loc, st_mode_from_ia (buf->ia_prot,
                                                       buf->ia_type),
                             makedev (ia_major (buf->ia_rdev),
-                                     ia_minor (buf->ia_rdev)), dict);
+                                     ia_minor (buf->ia_rdev)), dict, 0);
         if (ret) {
                 gf_log (this->name, GF_LOG_WARNING, "%s: mknod failed (%s)",
                         loc->path, strerror (errno));