From: Allison Henderson <allison.henderson@xxxxxxxxxx>
This patch modifies xfs_symlink to add a parent pointer to the inode.
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_trans_space.h | 2 --
fs/xfs/xfs_symlink.c | 54 ++++++++++++++++++++++++++++-----
2 files changed, 47 insertions(+), 9 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index f72207923ec2..25a55650baf4 100644
--- a/fs/xfs/libxfs/xfs_trans_space.h
+++ b/fs/xfs/libxfs/xfs_trans_space.h
@@ -95,8 +95,6 @@
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_SYMLINK_SPACE_RES(mp,nl,b) \
- (XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
#define XFS_IFREE_SPACE_RES(mp) \
(xfs_has_finobt(mp) ? M_IGEO(mp)->inobt_maxlevels : 0)
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index 27a7d7c57015..92d69b3ca28d 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -23,6 +23,8 @@
#include "xfs_trans.h"
#include "xfs_ialloc.h"
#include "xfs_error.h"
+#include "xfs_parent.h"
+#include "xfs_defer.h"
/* ----- Kernel only functions below ----- */
int
@@ -142,6 +144,23 @@ xfs_readlink(
return error;
}
+static unsigned int
+xfs_symlink_space_res(
+ struct xfs_mount *mp,
+ unsigned int namelen,
+ unsigned int fsblocks)
+{
+ unsigned int ret;
+
+ ret = XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp, namelen) +
+ fsblocks;
+
+ if (xfs_has_parent(mp))
+ ret += xfs_pptr_calc_space_res(mp, namelen);
+
+ return ret;
+}
+
int
xfs_symlink(
struct user_namespace *mnt_userns,
@@ -172,6 +191,8 @@ xfs_symlink(
struct xfs_dquot *pdqp = NULL;
uint resblks;
xfs_ino_t ino;
+ xfs_dir2_dataptr_t diroffset;
+ struct xfs_parent_defer *parent = NULL;
*ipp = NULL;
@@ -202,13 +223,21 @@ xfs_symlink(
/*
* The symlink will fit into the inode data fork?
- * There can't be any attributes so we get the whole variable part.
+ * If there are no parent pointers, then there wont't be any attributes.
+ * So we get the whole variable part, and do not need to reserve extra
+ * blocks. Otherwise, we need to reserve the blocks.
*/
- if (pathlen <= XFS_LITINO(mp))
+ if (pathlen <= XFS_LITINO(mp) && !xfs_has_parent(mp))
fs_blocks = 0;
else
fs_blocks = xfs_symlink_blocks(mp, pathlen);
- resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks);
+ resblks = xfs_symlink_space_res(mp, link_name->len, fs_blocks);
+
+ if (xfs_has_parent(mp)) {
+ error = xfs_parent_init(mp, &parent);
+ if (error)
+ return error;
+ }
error = xfs_trans_alloc_icreate(mp, &M_RES(mp)->tr_symlink, udqp, gdqp,
pdqp, resblks, &tp);
@@ -233,7 +262,7 @@ xfs_symlink(
if (!error)
error = xfs_init_new_inode(mnt_userns, tp, dp, ino,
S_IFLNK | (mode & ~S_IFMT), 1, 0, prid,
- false, &ip);
+ xfs_has_parent(mp), &ip);
if (error)
goto out_trans_cancel;
@@ -244,8 +273,7 @@ xfs_symlink(
* the transaction cancel unlocking dp so don't do it explicitly in the
* error path.
*/
- xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
- unlock_dp_on_error = false;
+ xfs_trans_ijoin(tp, dp, 0);
/*
* Also attach the dquot(s) to it, if applicable.
@@ -315,12 +343,20 @@ xfs_symlink(
* Create the directory entry for the symlink.
*/
error = xfs_dir_createname(tp, dp, link_name,
- ip->i_ino, resblks, NULL);
+ ip->i_ino, resblks, &diroffset);
if (error)
goto out_trans_cancel;
xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
+ if (parent) {
+ error = xfs_parent_defer_add(tp, parent, dp, link_name,
+ diroffset, ip);
+ if (error)
+ goto out_trans_cancel;
+ }
+
+
/*
* If this is a synchronous mount, make sure that the
* symlink transaction goes to disk before returning to
@@ -339,6 +375,7 @@ xfs_symlink(
*ipp = ip;
xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
return 0;
out_trans_cancel:
@@ -362,6 +399,9 @@ xfs_symlink(
xfs_iunlock(dp, XFS_ILOCK_EXCL);
if (ip)
xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ if (parent)
+ xfs_parent_cancel(mp, parent);
+
return error;
}
--
2.25.1
