From: Allison Henderson <allison.henderson@xxxxxxxxxx>
This patch removes the old parent pointer attribute during the rename
operation, and re-adds the updated parent pointer.
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
[djwong: adjust to new ondisk format]
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_attr.c | 2 -
fs/xfs/libxfs/xfs_attr.h | 1
fs/xfs/libxfs/xfs_parent.c | 58 ++++++++++++++++++++--
fs/xfs/libxfs/xfs_parent.h | 23 ++++++++-
fs/xfs/libxfs/xfs_trans_space.h | 2 -
fs/xfs/xfs_inode.c | 103 +++++++++++++++++++++++++++++++++++++--
6 files changed, 174 insertions(+), 15 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 37c86274b568..e1e0a5fd3418 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -936,7 +936,7 @@ xfs_attr_defer_add(
}
/* Sets an attribute for an inode as a deferred operation */
-static int
+int
xfs_attr_defer_replace(
struct xfs_da_args *args)
{
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 07c61bd70ef8..3ad1f12a511a 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -551,6 +551,7 @@ int xfs_attr_get_ilocked(struct xfs_da_args *args);
int xfs_attr_get(struct xfs_da_args *args);
int xfs_attr_defer_add(struct xfs_da_args *args);
int xfs_attr_defer_remove(struct xfs_da_args *args);
+int xfs_attr_defer_replace(struct xfs_da_args *args);
int xfs_attr_set(struct xfs_da_args *args);
int xfs_attr_set_iter(struct xfs_attr_intent *attr);
int xfs_attr_remove_iter(struct xfs_attr_intent *attr);
diff --git a/fs/xfs/libxfs/xfs_parent.c b/fs/xfs/libxfs/xfs_parent.c
index 393409502770..977412b8f9f3 100644
--- a/fs/xfs/libxfs/xfs_parent.c
+++ b/fs/xfs/libxfs/xfs_parent.c
@@ -116,6 +116,19 @@ xfs_init_parent_davalue(
args->value = (void *)name->name;
}
+/*
+ * Point the da args new value fields at the non-key parts of a replacement
+ * parent pointer.
+ */
+static inline void
+xfs_init_parent_danewvalue(
+ struct xfs_da_args *args,
+ const struct xfs_name *name)
+{
+ args->new_valuelen = name->len;
+ args->new_value = (void *)name->name;
+}
+
/*
* Allocate memory to control a logged parent pointer update as part of a
* dirent operation.
@@ -123,22 +136,27 @@ xfs_init_parent_davalue(
int
__xfs_parent_init(
struct xfs_mount *mp,
+ bool grab_log,
struct xfs_parent_defer **parentp)
{
struct xfs_parent_defer *parent;
int error;
- error = xfs_attr_grab_log_assist(mp);
- if (error)
- return error;
+ if (grab_log) {
+ error = xfs_attr_grab_log_assist(mp);
+ if (error)
+ return error;
+ }
parent = kmem_cache_zalloc(xfs_parent_intent_cache, GFP_KERNEL);
if (!parent) {
- xfs_attr_rele_log_assist(mp);
+ if (grab_log)
+ xfs_attr_rele_log_assist(mp);
return -ENOMEM;
}
/* init parent da_args */
+ parent->have_log = grab_log;
parent->args.geo = mp->m_attr_geo;
parent->args.whichfork = XFS_ATTR_FORK;
parent->args.attr_filter = XFS_ATTR_PARENT;
@@ -204,13 +222,43 @@ xfs_parent_remove(
return xfs_attr_defer_remove(args);
}
+/* Replace one parent pointer with another to reflect a rename. */
+int
+xfs_parent_replace(
+ struct xfs_trans *tp,
+ struct xfs_parent_defer *parent,
+ struct xfs_inode *old_dp,
+ const struct xfs_name *old_name,
+ struct xfs_inode *new_dp,
+ const struct xfs_name *new_name,
+ struct xfs_inode *child)
+{
+ struct xfs_da_args *args = &parent->args;
+
+ xfs_init_parent_name_rec(&parent->rec, old_dp, old_name, child);
+ args->hashval = xfs_parent_hashname(old_dp, parent);
+
+ xfs_init_parent_name_rec(&parent->new_rec, new_dp, new_name, child);
+ args->new_name = (const uint8_t *)&parent->new_rec;
+ args->new_namelen = sizeof(struct xfs_parent_name_rec);
+
+ args->trans = tp;
+ args->dp = child;
+
+ xfs_init_parent_davalue(&parent->args, old_name);
+ xfs_init_parent_danewvalue(&parent->args, new_name);
+
+ return xfs_attr_defer_replace(args);
+}
+
/* Cancel a parent pointer operation. */
void
__xfs_parent_cancel(
struct xfs_mount *mp,
struct xfs_parent_defer *parent)
{
- xlog_drop_incompat_feat(mp->m_log);
+ if (parent->have_log)
+ xlog_drop_incompat_feat(mp->m_log);
kmem_cache_free(xfs_parent_intent_cache, parent);
}
diff --git a/fs/xfs/libxfs/xfs_parent.h b/fs/xfs/libxfs/xfs_parent.h
index 0f8194cd8a9f..f4a0793bc4fc 100644
--- a/fs/xfs/libxfs/xfs_parent.h
+++ b/fs/xfs/libxfs/xfs_parent.h
@@ -21,10 +21,13 @@ extern struct kmem_cache *xfs_parent_intent_cache;
*/
struct xfs_parent_defer {
struct xfs_parent_name_rec rec;
+ struct xfs_parent_name_rec new_rec;
struct xfs_da_args args;
+ bool have_log;
};
-int __xfs_parent_init(struct xfs_mount *mp, struct xfs_parent_defer **parentp);
+int __xfs_parent_init(struct xfs_mount *mp, bool grab_log,
+ struct xfs_parent_defer **parentp);
static inline int
xfs_parent_start(
@@ -34,7 +37,19 @@ xfs_parent_start(
*pp = NULL;
if (xfs_has_parent(mp))
- return __xfs_parent_init(mp, pp);
+ return __xfs_parent_init(mp, true, pp);
+ return 0;
+}
+
+static inline int
+xfs_parent_start_locked(
+ struct xfs_mount *mp,
+ struct xfs_parent_defer **pp)
+{
+ *pp = NULL;
+
+ if (xfs_has_parent(mp))
+ return __xfs_parent_init(mp, false, pp);
return 0;
}
@@ -44,6 +59,10 @@ int xfs_parent_add(struct xfs_trans *tp, struct xfs_parent_defer *parent,
int xfs_parent_remove(struct xfs_trans *tp, struct xfs_parent_defer *parent,
struct xfs_inode *dp, const struct xfs_name *parent_name,
struct xfs_inode *child);
+int xfs_parent_replace(struct xfs_trans *tp, struct xfs_parent_defer *parent,
+ struct xfs_inode *old_dp, const struct xfs_name *old_name,
+ struct xfs_inode *new_dp, const struct xfs_name *new_name,
+ struct xfs_inode *child);
void __xfs_parent_cancel(struct xfs_mount *mp, struct xfs_parent_defer *parent);
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index b5ab6701e7fb..810610a14c4d 100644
--- a/fs/xfs/libxfs/xfs_trans_space.h
+++ b/fs/xfs/libxfs/xfs_trans_space.h
@@ -91,8 +91,6 @@
XFS_DQUOT_CLUSTER_SIZE_FSB)
#define XFS_QM_QINOCREATE_SPACE_RES(mp) \
XFS_IALLOC_SPACE_RES(mp)
-#define XFS_RENAME_SPACE_RES(mp,nl) \
- (XFS_DIRREMOVE_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl))
#define XFS_IFREE_SPACE_RES(mp) \
(xfs_has_finobt(mp) ? M_IGEO(mp)->inobt_maxlevels : 0)
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 1c09ae7d4ed5..5ad934358791 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2865,7 +2865,7 @@ xfs_rename_alloc_whiteout(
int error;
error = xfs_create_tmpfile(idmap, dp, S_IFCHR | WHITEOUT_MODE,
- false, &tmpfile);
+ xfs_has_parent(dp->i_mount), &tmpfile);
if (error)
return error;
@@ -2891,6 +2891,31 @@ xfs_rename_alloc_whiteout(
return 0;
}
+static unsigned int
+xfs_rename_space_res(
+ struct xfs_mount *mp,
+ struct xfs_name *src_name,
+ struct xfs_parent_defer *target_parent_ptr,
+ struct xfs_name *target_name,
+ struct xfs_parent_defer *new_parent_ptr,
+ struct xfs_inode *wip)
+{
+ unsigned int ret;
+
+ ret = XFS_DIRREMOVE_SPACE_RES(mp) +
+ XFS_DIRENTER_SPACE_RES(mp, target_name->len);
+
+ if (new_parent_ptr) {
+ if (wip)
+ ret += xfs_parent_calc_space_res(mp, src_name->len);
+ ret += 2 * xfs_parent_calc_space_res(mp, target_name->len);
+ }
+ if (target_parent_ptr)
+ ret += xfs_parent_calc_space_res(mp, target_name->len);
+
+ return ret;
+}
+
/*
* xfs_rename
*/
@@ -2917,6 +2942,9 @@ xfs_rename(
int spaceres;
bool retried = false;
int error, nospace_error = 0;
+ struct xfs_parent_defer *src_ip_pptr = NULL;
+ struct xfs_parent_defer *tgt_ip_pptr = NULL;
+ struct xfs_parent_defer *wip_pptr = NULL;
trace_xfs_rename(src_dp, target_dp, src_name, target_name);
@@ -2941,9 +2969,26 @@ xfs_rename(
xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, wip,
inodes, &num_inodes);
+ error = xfs_parent_start(mp, &src_ip_pptr);
+ if (error)
+ goto out_release_wip;
+
+ if (wip) {
+ error = xfs_parent_start_locked(mp, &wip_pptr);
+ if (error)
+ goto out_src_ip_pptr;
+ }
+
+ if (target_ip) {
+ error = xfs_parent_start_locked(mp, &tgt_ip_pptr);
+ if (error)
+ goto out_wip_pptr;
+ }
+
retry:
nospace_error = 0;
- spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
+ spaceres = xfs_rename_space_res(mp, src_name, tgt_ip_pptr,
+ target_name, src_ip_pptr, wip);
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_rename, spaceres, 0, 0, &tp);
if (error == -ENOSPC) {
nospace_error = error;
@@ -2952,14 +2997,26 @@ xfs_rename(
&tp);
}
if (error)
- goto out_release_wip;
+ goto out_tgt_ip_pptr;
+
+ /*
+ * We don't allow reservationless renaming when parent pointers are
+ * enabled because we can't back out if the xattrs must grow.
+ */
+ if (src_ip_pptr && nospace_error) {
+ error = nospace_error;
+ xfs_trans_cancel(tp);
+ goto out_tgt_ip_pptr;
+ }
/*
* Attach the dquots to the inodes
*/
error = xfs_qm_vop_rename_dqattach(inodes);
- if (error)
- goto out_trans_cancel;
+ if (error) {
+ xfs_trans_cancel(tp);
+ goto out_tgt_ip_pptr;
+ }
/*
* Lock all the participating inodes. Depending upon whether
@@ -3026,6 +3083,15 @@ xfs_rename(
goto out_trans_cancel;
}
+ /*
+ * We don't allow quotaless renaming when parent pointers are enabled
+ * because we can't back out if the xattrs must grow.
+ */
+ if (src_ip_pptr && nospace_error) {
+ error = nospace_error;
+ goto out_trans_cancel;
+ }
+
/*
* Check for expected errors before we dirty the transaction
* so we can return an error without a transaction abort.
@@ -3218,6 +3284,26 @@ xfs_rename(
if (error)
goto out_trans_cancel;
+ if (wip_pptr) {
+ error = xfs_parent_add(tp, wip_pptr, src_dp, src_name, wip);
+ if (error)
+ goto out_trans_cancel;
+ }
+
+ if (src_ip_pptr) {
+ error = xfs_parent_replace(tp, src_ip_pptr, src_dp, src_name,
+ target_dp, target_name, src_ip);
+ if (error)
+ goto out_trans_cancel;
+ }
+
+ if (tgt_ip_pptr) {
+ error = xfs_parent_remove(tp, tgt_ip_pptr, target_dp,
+ target_name, target_ip);
+ 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)
@@ -3231,6 +3317,13 @@ xfs_rename(
xfs_trans_cancel(tp);
out_unlock:
xfs_iunlock_rename(inodes, num_inodes);
+out_tgt_ip_pptr:
+ xfs_parent_finish(mp, tgt_ip_pptr);
+out_wip_pptr:
+ xfs_parent_finish(mp, wip_pptr);
+out_src_ip_pptr:
+ xfs_parent_finish(mp, src_ip_pptr);
+
out_release_wip:
if (wip)
xfs_irele(wip);
