[PATCH RESEND v2 15/18] xfs: Add parent pointers to rename

Allison Henderson
2022-08-04T19:40:46Z

This patch removes the old parent pointer attribute during the rename
operation, and re-adds the updated parent pointer. In the case of
xfs_cross_rename, we modify the routine not to roll the transaction just
yet. We will do this after the parent pointer is added in the calling
xfs_rename function.

Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
---
fs/xfs/xfs_inode.c | 128 +++++++++++++++++++++++++++++++++------------
1 file changed, 94 insertions(+), 34 deletions(-)

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 69bb67f2a252..8a81b78b6dd7 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2776,7 +2776,7 @@ xfs_cross_rename(
}
xfs_trans_ichgtime(tp, dp1, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, dp1, XFS_ILOG_CORE);
- return xfs_finish_rename(tp);
+ return 0;

out_trans_abort:
xfs_trans_cancel(tp);
@@ -2834,26 +2834,31 @@ xfs_rename_alloc_whiteout(
*/
int
xfs_rename(
- struct user_namespace *mnt_userns,
- struct xfs_inode *src_dp,
- struct xfs_name *src_name,
- struct xfs_inode *src_ip,
- struct xfs_inode *target_dp,
- struct xfs_name *target_name,
- struct xfs_inode *target_ip,
- unsigned int flags)
+ struct user_namespace *mnt_userns,
+ struct xfs_inode *src_dp,
+ struct xfs_name *src_name,
+ struct xfs_inode *src_ip,
+ struct xfs_inode *target_dp,
+ struct xfs_name *target_name,
+ struct xfs_inode *target_ip,
+ unsigned int flags)
{
- struct xfs_mount *mp = src_dp->i_mount;
- struct xfs_trans *tp;
- struct xfs_inode *wip = NULL; /* whiteout inode */
- struct xfs_inode *inodes[__XFS_SORT_INODES];
- int i;
- int num_inodes = __XFS_SORT_INODES;
- bool new_parent = (src_dp != target_dp);
- bool src_is_directory = S_ISDIR(VFS_I(src_ip)->i_mode);
- int spaceres;
- bool retried = false;
- int error, nospace_error = 0;
+ struct xfs_mount *mp = src_dp->i_mount;
+ struct xfs_trans *tp;
+ struct xfs_inode *wip = NULL; /* whiteout inode */
+ struct xfs_inode *inodes[__XFS_SORT_INODES];
+ int i;
+ int num_inodes = __XFS_SORT_INODES;
+ bool new_parent = (src_dp != target_dp);
+ bool src_is_directory = S_ISDIR(VFS_I(src_ip)->i_mode);
+ int spaceres;
+ bool retried = false;
+ int error, nospace_error = 0;
+ xfs_dir2_dataptr_t new_diroffset;
+ xfs_dir2_dataptr_t old_diroffset;
+ struct xfs_parent_defer *old_parent_ptr = NULL;
+ struct xfs_parent_defer *new_parent_ptr = NULL;
+ struct xfs_parent_defer *target_parent_ptr = NULL;

trace_xfs_rename(src_dp, target_dp, src_name, target_name);

@@ -2877,6 +2882,15 @@ xfs_rename(

xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, wip,
inodes, &num_inodes);
+ if (xfs_has_parent(mp)) {
+ error = xfs_parent_init(mp, src_ip, NULL, &old_parent_ptr);
+ if (error)
+ goto out_release_wip;
+ error = xfs_parent_init(mp, src_ip, target_name,
+ &new_parent_ptr);
+ if (error)
+ goto out_release_wip;
+ }

retry:
nospace_error = 0;
@@ -2889,7 +2903,7 @@ xfs_rename(
&tp);
}
if (error)
- goto out_release_wip;
+ goto drop_incompat;

/*
* Attach the dquots to the inodes
@@ -2911,14 +2925,14 @@ xfs_rename(
* we can rely on either trans_commit or trans_cancel to unlock
* them.
*/
- xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, src_dp, 0);
if (new_parent)
- xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
- xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, target_dp, 0);
+ xfs_trans_ijoin(tp, src_ip, 0);
if (target_ip)
- xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, target_ip, 0);
if (wip)
- xfs_trans_ijoin(tp, wip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, wip, 0);

/*
* If we are using project inheritance, we only allow renames
@@ -2928,15 +2942,16 @@ xfs_rename(
if (unlikely((target_dp->i_diflags & XFS_DIFLAG_PROJINHERIT) &&
target_dp->i_projid != src_ip->i_projid)) {
error = -EXDEV;
- goto out_trans_cancel;
+ goto out_unlock;
}

/* RENAME_EXCHANGE is unique from here on. */
- if (flags & RENAME_EXCHANGE)
- return xfs_cross_rename(tp, src_dp, src_name, src_ip,
+ if (flags & RENAME_EXCHANGE) {
+ error = xfs_cross_rename(tp, src_dp, src_name, src_ip,
target_dp, target_name, target_ip,
spaceres);
-
+ goto out_pptr;
+ }
/*
* Try to reserve quota to handle an expansion of the target directory.
* We'll allow the rename to continue in reservationless mode if we hit
@@ -3052,7 +3067,7 @@ xfs_rename(
* to account for the ".." reference from the new entry.
*/
error = xfs_dir_createname(tp, target_dp, target_name,
- src_ip->i_ino, spaceres, NULL);
+ src_ip->i_ino, spaceres, &new_diroffset);
if (error)
goto out_trans_cancel;

@@ -3073,10 +3088,14 @@ xfs_rename(
* name at the destination directory, remove it first.
*/
error = xfs_dir_replace(tp, target_dp, target_name,
- src_ip->i_ino, spaceres, NULL);
+ src_ip->i_ino, spaceres, &new_diroffset);
if (error)
goto out_trans_cancel;

+ if (xfs_has_parent(mp))
+ error = xfs_parent_init(mp, target_ip, NULL,
+ &target_parent_ptr);
+
xfs_trans_ichgtime(tp, target_dp,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);

@@ -3146,26 +3165,67 @@ xfs_rename(
*/
if (wip)
error = xfs_dir_replace(tp, src_dp, src_name, wip->i_ino,
- spaceres, NULL);
+ spaceres, &old_diroffset);
else
error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
- spaceres, NULL);
+ spaceres, &old_diroffset);

if (error)
goto out_trans_cancel;

+out_pptr:
+ if (new_parent_ptr) {
+ error = xfs_parent_defer_add(tp, target_dp, new_parent_ptr,
+ new_diroffset);
+ if (error)
+ goto out_trans_cancel;
+ }
+
+ if (old_parent_ptr) {
+ error = xfs_parent_defer_remove(tp, src_dp, old_parent_ptr,
+ old_diroffset);
+ if (error)
+ goto out_trans_cancel;
+ }
+
+ if (target_parent_ptr) {
+ error = xfs_parent_defer_remove(tp, target_dp,
+ target_parent_ptr,
+ new_diroffset);
+ if (error)
+ goto out_trans_cancel;
+ }
+
xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
if (new_parent)
xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);

error = xfs_finish_rename(tp);
+
+out_unlock:
if (wip)
xfs_irele(wip);
+ if (wip)
+ xfs_iunlock(wip, XFS_ILOCK_EXCL);
+ if (target_ip)
+ xfs_iunlock(target_ip, XFS_ILOCK_EXCL);
+ xfs_iunlock(src_ip, XFS_ILOCK_EXCL);
+ if (new_parent)
+ xfs_iunlock(target_dp, XFS_ILOCK_EXCL);
+ xfs_iunlock(src_dp, XFS_ILOCK_EXCL);
+
return error;

out_trans_cancel:
xfs_trans_cancel(tp);
+drop_incompat:
+ if (new_parent_ptr)
+ xfs_parent_cancel(mp, new_parent_ptr);
+ if (old_parent_ptr)
+ xfs_parent_cancel(mp, old_parent_ptr);
+ if (target_parent_ptr)
+ xfs_parent_cancel(mp, target_parent_ptr);
out_release_wip:
if (wip)
xfs_irele(wip);
--
2.25.1