From: Allison Henderson <allison.henderson@xxxxxxxxxx>
This patch removes the parent pointer attribute during unlink
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
[djwong: adjust to new ondisk format, minor rebase fixes]
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 | 22 ++++++++++++++++++++++
fs/xfs/libxfs/xfs_parent.h | 4 ++++
fs/xfs/libxfs/xfs_trans_space.h | 2 --
fs/xfs/xfs_inode.c | 39 +++++++++++++++++++++++++++++++++------
6 files changed, 61 insertions(+), 9 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index e2acd7ecdfcc..37c86274b568 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -959,7 +959,7 @@ xfs_attr_defer_replace(
}
/* Removes an attribute for an inode as a deferred operation */
-static int
+int
xfs_attr_defer_remove(
struct xfs_da_args *args)
{
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index 1002e431b728..07c61bd70ef8 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -550,6 +550,7 @@ bool xfs_attr_is_leaf(struct xfs_inode *ip);
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_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 f57e1a201f17..393409502770 100644
--- a/fs/xfs/libxfs/xfs_parent.c
+++ b/fs/xfs/libxfs/xfs_parent.c
@@ -182,6 +182,28 @@ xfs_parent_add(
return xfs_attr_defer_add(args);
}
+/* Remove a parent pointer to reflect a dirent removal. */
+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)
+{
+ struct xfs_da_args *args = &parent->args;
+
+ xfs_init_parent_name_rec(&parent->rec, dp, parent_name, child);
+ args->hashval = xfs_parent_hashname(dp, parent);
+
+ args->trans = tp;
+ args->dp = child;
+
+ xfs_init_parent_davalue(&parent->args, parent_name);
+
+ return xfs_attr_defer_remove(args);
+}
+
/* Cancel a parent pointer operation. */
void
__xfs_parent_cancel(
diff --git a/fs/xfs/libxfs/xfs_parent.h b/fs/xfs/libxfs/xfs_parent.h
index 8e7dbe22e1f7..0f8194cd8a9f 100644
--- a/fs/xfs/libxfs/xfs_parent.h
+++ b/fs/xfs/libxfs/xfs_parent.h
@@ -41,6 +41,10 @@ xfs_parent_start(
int xfs_parent_add(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_remove(struct xfs_trans *tp, struct xfs_parent_defer *parent,
+ struct xfs_inode *dp, const struct xfs_name *parent_name,
+ struct xfs_inode *child);
+
void __xfs_parent_cancel(struct xfs_mount *mp, struct xfs_parent_defer *parent);
static inline void
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index 25a55650baf4..b5ab6701e7fb 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_REMOVE_SPACE_RES(mp) \
- XFS_DIRREMOVE_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) \
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index c07b9b5b8d34..aea1f781c84c 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2472,6 +2472,19 @@ xfs_iunpin_wait(
__xfs_iunpin_wait(ip);
}
+static unsigned int
+xfs_remove_space_res(
+ struct xfs_mount *mp,
+ unsigned int namelen)
+{
+ unsigned int ret = XFS_DIRREMOVE_SPACE_RES(mp);
+
+ if (xfs_has_parent(mp))
+ ret += xfs_parent_calc_space_res(mp, namelen);
+
+ return ret;
+}
+
/*
* Removing an inode from the namespace involves removing the directory entry
* and dropping the link count on the inode. Removing the directory entry can
@@ -2501,16 +2514,17 @@ xfs_iunpin_wait(
*/
int
xfs_remove(
- xfs_inode_t *dp,
+ struct xfs_inode *dp,
struct xfs_name *name,
- xfs_inode_t *ip)
+ struct xfs_inode *ip)
{
- xfs_mount_t *mp = dp->i_mount;
- xfs_trans_t *tp = NULL;
+ struct xfs_mount *mp = dp->i_mount;
+ struct xfs_trans *tp = NULL;
int is_dir = S_ISDIR(VFS_I(ip)->i_mode);
int dontcare;
int error = 0;
uint resblks;
+ struct xfs_parent_defer *parent = NULL;
trace_xfs_remove(dp, name);
@@ -2525,6 +2539,10 @@ xfs_remove(
if (error)
goto std_return;
+ error = xfs_parent_start(mp, &parent);
+ if (error)
+ goto std_return;
+
/*
* We try to get the real space reservation first, allowing for
* directory btree deletion(s) implying possible bmap insert(s). If we
@@ -2536,12 +2554,12 @@ xfs_remove(
* the directory code can handle a reservationless update and we don't
* want to prevent a user from trying to free space by deleting things.
*/
- resblks = XFS_REMOVE_SPACE_RES(mp);
+ resblks = xfs_remove_space_res(mp, name->len);
error = xfs_trans_alloc_dir(dp, &M_RES(mp)->tr_remove, ip, &resblks,
&tp, &dontcare);
if (error) {
ASSERT(error != -ENOSPC);
- goto std_return;
+ goto out_parent;
}
/*
@@ -2601,6 +2619,12 @@ xfs_remove(
goto out_trans_cancel;
}
+ if (parent) {
+ error = xfs_parent_remove(tp, parent, dp, name, ip);
+ if (error)
+ goto out_trans_cancel;
+ }
+
/*
* If this is a synchronous mount, make sure that the
* remove transaction goes to disk before returning to
@@ -2618,6 +2642,7 @@ xfs_remove(
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ xfs_parent_finish(mp, parent);
return 0;
out_trans_cancel:
@@ -2625,6 +2650,8 @@ xfs_remove(
out_unlock:
xfs_iunlock(ip, XFS_ILOCK_EXCL);
xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ out_parent:
+ xfs_parent_finish(mp, parent);
std_return:
return error;
}
