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Diffstat (limited to 'fs/xfs/xfs_inode.c')
-rw-r--r--fs/xfs/xfs_inode.c136
1 files changed, 135 insertions, 1 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 41f804e740d7..daafa1f6d260 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1995,6 +1995,7 @@ xfs_iunlink(
agi->agi_unlinked[bucket_index] = cpu_to_be32(agino);
offset = offsetof(xfs_agi_t, agi_unlinked) +
(sizeof(xfs_agino_t) * bucket_index);
+ xfs_trans_buf_set_type(tp, agibp, XFS_BLFT_AGI_BUF);
xfs_trans_log_buf(tp, agibp, offset,
(offset + sizeof(xfs_agino_t) - 1));
return 0;
@@ -2086,6 +2087,7 @@ xfs_iunlink_remove(
agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino);
offset = offsetof(xfs_agi_t, agi_unlinked) +
(sizeof(xfs_agino_t) * bucket_index);
+ xfs_trans_buf_set_type(tp, agibp, XFS_BLFT_AGI_BUF);
xfs_trans_log_buf(tp, agibp, offset,
(offset + sizeof(xfs_agino_t) - 1));
} else {
@@ -2656,6 +2658,124 @@ xfs_sort_for_rename(
}
/*
+ * xfs_cross_rename()
+ *
+ * responsible for handling RENAME_EXCHANGE flag in renameat2() sytemcall
+ */
+STATIC int
+xfs_cross_rename(
+ struct xfs_trans *tp,
+ struct xfs_inode *dp1,
+ struct xfs_name *name1,
+ struct xfs_inode *ip1,
+ struct xfs_inode *dp2,
+ struct xfs_name *name2,
+ struct xfs_inode *ip2,
+ struct xfs_bmap_free *free_list,
+ xfs_fsblock_t *first_block,
+ int spaceres)
+{
+ int error = 0;
+ int ip1_flags = 0;
+ int ip2_flags = 0;
+ int dp2_flags = 0;
+
+ /* Swap inode number for dirent in first parent */
+ error = xfs_dir_replace(tp, dp1, name1,
+ ip2->i_ino,
+ first_block, free_list, spaceres);
+ if (error)
+ goto out;
+
+ /* Swap inode number for dirent in second parent */
+ error = xfs_dir_replace(tp, dp2, name2,
+ ip1->i_ino,
+ first_block, free_list, spaceres);
+ if (error)
+ goto out;
+
+ /*
+ * If we're renaming one or more directories across different parents,
+ * update the respective ".." entries (and link counts) to match the new
+ * parents.
+ */
+ if (dp1 != dp2) {
+ dp2_flags = XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
+
+ if (S_ISDIR(ip2->i_d.di_mode)) {
+ error = xfs_dir_replace(tp, ip2, &xfs_name_dotdot,
+ dp1->i_ino, first_block,
+ free_list, spaceres);
+ if (error)
+ goto out;
+
+ /* transfer ip2 ".." reference to dp1 */
+ if (!S_ISDIR(ip1->i_d.di_mode)) {
+ error = xfs_droplink(tp, dp2);
+ if (error)
+ goto out;
+ error = xfs_bumplink(tp, dp1);
+ if (error)
+ goto out;
+ }
+
+ /*
+ * Although ip1 isn't changed here, userspace needs
+ * to be warned about the change, so that applications
+ * relying on it (like backup ones), will properly
+ * notify the change
+ */
+ ip1_flags |= XFS_ICHGTIME_CHG;
+ ip2_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
+ }
+
+ if (S_ISDIR(ip1->i_d.di_mode)) {
+ error = xfs_dir_replace(tp, ip1, &xfs_name_dotdot,
+ dp2->i_ino, first_block,
+ free_list, spaceres);
+ if (error)
+ goto out;
+
+ /* transfer ip1 ".." reference to dp2 */
+ if (!S_ISDIR(ip2->i_d.di_mode)) {
+ error = xfs_droplink(tp, dp1);
+ if (error)
+ goto out;
+ error = xfs_bumplink(tp, dp2);
+ if (error)
+ goto out;
+ }
+
+ /*
+ * Although ip2 isn't changed here, userspace needs
+ * to be warned about the change, so that applications
+ * relying on it (like backup ones), will properly
+ * notify the change
+ */
+ ip1_flags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG;
+ ip2_flags |= XFS_ICHGTIME_CHG;
+ }
+ }
+
+ if (ip1_flags) {
+ xfs_trans_ichgtime(tp, ip1, ip1_flags);
+ xfs_trans_log_inode(tp, ip1, XFS_ILOG_CORE);
+ }
+ if (ip2_flags) {
+ xfs_trans_ichgtime(tp, ip2, ip2_flags);
+ xfs_trans_log_inode(tp, ip2, XFS_ILOG_CORE);
+ }
+ if (dp2_flags) {
+ xfs_trans_ichgtime(tp, dp2, dp2_flags);
+ xfs_trans_log_inode(tp, dp2, XFS_ILOG_CORE);
+ }
+ xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE);
+out:
+ return error;
+}
+
+/*
* xfs_rename
*/
int
@@ -2665,7 +2785,8 @@ xfs_rename(
xfs_inode_t *src_ip,
xfs_inode_t *target_dp,
struct xfs_name *target_name,
- xfs_inode_t *target_ip)
+ xfs_inode_t *target_ip,
+ unsigned int flags)
{
xfs_trans_t *tp = NULL;
xfs_mount_t *mp = src_dp->i_mount;
@@ -2743,6 +2864,18 @@ xfs_rename(
}
/*
+ * Handle RENAME_EXCHANGE flags
+ */
+ if (flags & RENAME_EXCHANGE) {
+ error = xfs_cross_rename(tp, src_dp, src_name, src_ip,
+ target_dp, target_name, target_ip,
+ &free_list, &first_block, spaceres);
+ if (error)
+ goto abort_return;
+ goto finish_rename;
+ }
+
+ /*
* Set up the target.
*/
if (target_ip == NULL) {
@@ -2881,6 +3014,7 @@ xfs_rename(
if (new_parent)
xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
+finish_rename:
/*
* If this is a synchronous mount, make sure that the
* rename transaction goes to disk before returning to