From: Dave Chinner <dchinner@xxxxxxxxxx>
[bfoster: rebase, use VFS inode fields, fix xfs_bmap_finish() usage]
[achender: rebased, changed __unint32_t to xfs_dir2_dataptr_t,
fixed null pointer bugs]
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_attr.c | 20 +++++++++++++-
fs/xfs/libxfs/xfs_parent.c | 43 ++++++++++++++++++++++++++++++
fs/xfs/xfs_attr.h | 10 +++++++
fs/xfs/xfs_inode.c | 66 ++++++++++++++++++++++++++++++++++++----------
4 files changed, 124 insertions(+), 15 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 8aad242..e7692ef 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -35,6 +35,7 @@
#include "xfs_bmap_util.h"
#include "xfs_bmap_btree.h"
#include "xfs_attr.h"
+#include "xfs_attr_sf.h"
#include "xfs_attr_leaf.h"
#include "xfs_attr_remote.h"
#include "xfs_error.h"
@@ -266,6 +267,23 @@ xfs_attr_set_first_parent(
return error;
}
+int
+xfs_attr_set_parent(
+ struct xfs_trans *tp,
+ struct xfs_inode *ip,
+ struct xfs_parent_name_rec *rec,
+ int reclen,
+ const char *value,
+ int valuelen,
+ struct xfs_defer_ops *dfops,
+ xfs_fsblock_t *firstblock)
+{
+ int flags = ATTR_PARENT;
+
+ return xfs_attr_set_deferred(ip, dfops, (char *)rec, reclen,
+ (char *)value, valuelen, flags);
+}
+
/*
* set the attribute specified in @args. In the case of the parent attribute
* being set, we do not want to roll the transaction on shortform-to-leaf
@@ -512,8 +530,8 @@ xfs_attr_set(
*/
xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
error = xfs_trans_commit(args.trans);
- xfs_iunlock(dp, XFS_ILOCK_EXCL);
+ xfs_iunlock(dp, XFS_ILOCK_EXCL);
return error;
out_defer_cancel:
diff --git a/fs/xfs/libxfs/xfs_parent.c b/fs/xfs/libxfs/xfs_parent.c
index 88f7edc..0707336 100644
--- a/fs/xfs/libxfs/xfs_parent.c
+++ b/fs/xfs/libxfs/xfs_parent.c
@@ -96,3 +96,46 @@ xfs_parent_create(
return xfs_parent_create_nrec(tp, child, &nrec, dfops, firstblock);
}
+
+static int
+xfs_parent_add_nrec(
+ struct xfs_trans *tp,
+ struct xfs_inode *child,
+ struct xfs_parent_name_irec *nrec,
+ struct xfs_defer_ops *dfops,
+ xfs_fsblock_t *firstblock)
+{
+ struct xfs_parent_name_rec rec;
+
+ rec.p_ino = cpu_to_be64(nrec->p_ino);
+ rec.p_gen = cpu_to_be32(nrec->p_gen);
+ rec.p_diroffset = cpu_to_be32(nrec->p_diroffset);
+
+ return xfs_attr_set_parent(tp, child, &rec, sizeof(rec),
+ nrec->p_name, nrec->p_namelen,
+ dfops, firstblock);
+}
+
+/*
+ * Add a parent record to an inode with existing parent records.
+ */
+int
+xfs_parent_add(
+ struct xfs_trans *tp,
+ struct xfs_inode *parent,
+ struct xfs_inode *child,
+ struct xfs_name *child_name,
+ uint32_t diroffset,
+ struct xfs_defer_ops *dfops,
+ xfs_fsblock_t *firstblock)
+{
+ struct xfs_parent_name_irec nrec;
+
+ nrec.p_ino = parent->i_ino;
+ nrec.p_gen = VFS_I(parent)->i_generation;
+ nrec.p_diroffset = diroffset;
+ nrec.p_name = child_name->name;
+ nrec.p_namelen = child_name->len;
+
+ return xfs_parent_add_nrec(tp, child, &nrec, dfops, firstblock);
+}
diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h
index b48e31b..acb6157 100644
--- a/fs/xfs/xfs_attr.h
+++ b/fs/xfs/xfs_attr.h
@@ -197,4 +197,14 @@ int xfs_attr_set_first_parent(struct xfs_trans *tp, struct xfs_inode *ip,
const char *value, int valuelen,
struct xfs_defer_ops *dfops,
xfs_fsblock_t *firstblock);
+
+int xfs_parent_add(struct xfs_trans *tp, struct xfs_inode *parent,
+ struct xfs_inode *child, struct xfs_name *child_name,
+ xfs_dir2_dataptr_t diroffset, struct xfs_defer_ops *dfops,
+ xfs_fsblock_t *firstblock);
+int xfs_attr_set_parent(struct xfs_trans *tp, struct xfs_inode *ip,
+ struct xfs_parent_name_rec *rec, int reclen,
+ const char *value, int valuelen,
+ struct xfs_defer_ops *dfops, xfs_fsblock_t *firstblock);
+
#endif /* __XFS_ATTR_H__ */
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 4396561..51b623b 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1451,6 +1451,8 @@ xfs_link(
struct xfs_defer_ops dfops;
xfs_fsblock_t first_block;
int resblks;
+ uint32_t diroffset;
+ bool first_parent = false;
trace_xfs_link(tdp, target_name);
@@ -1467,6 +1469,25 @@ xfs_link(
if (error)
goto std_return;
+ /*
+ * If we have parent pointers and there is no attribute fork (i.e. we
+ * are linking in a O_TMPFILE created inode) we need to add the
+ * attribute fork to the inode. Because we may have an existing data
+ * fork, we do this before we start the link transaction as adding an
+ * attribute fork requires it's own transaction.
+ */
+ if (xfs_sb_version_hasparent(&mp->m_sb) && !xfs_inode_hasattr(sip)) {
+ int sf_size = sizeof(struct xfs_attr_sf_hdr) +
+ XFS_ATTR_SF_ENTSIZE_BYNAME(
+ sizeof(struct xfs_parent_name_rec),
+ target_name->len);
+ ASSERT(VFS_I(sip)->i_nlink == 0);
+ error = xfs_bmap_add_attrfork(sip, sf_size, 0);
+ if (error)
+ goto std_return;
+ first_parent = true;
+ }
+
resblks = XFS_LINK_SPACE_RES(mp, target_name->len);
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, resblks, 0, 0, &tp);
if (error == -ENOSPC) {
@@ -1498,8 +1519,6 @@ xfs_link(
goto error_return;
}
- xfs_defer_init(&dfops, &first_block);
-
/*
* Handle initial link state of O_TMPFILE inode
*/
@@ -1509,36 +1528,55 @@ xfs_link(
goto error_return;
}
+ xfs_defer_init(&dfops, &first_block);
error = xfs_dir_createname(tp, tdp, target_name, sip->i_ino,
- &first_block, &dfops, resblks, NULL);
+ &first_block, &dfops, resblks, &diroffset);
if (error)
- goto error_return;
+ goto out_defer_cancel;
xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
error = xfs_bumplink(tp, sip);
if (error)
- goto error_return;
+ goto out_defer_cancel;
/*
- * If this is a synchronous mount, make sure that the
- * link transaction goes to disk before returning to
- * the user.
+ * If we have parent pointers, we now need to add the parent record to
+ * the attribute fork of the inode. If this is the initial parent
+ * atribute, we need to create it correctly, otherwise we can just add
+ * the parent to the inode.
+ */
+ if (xfs_sb_version_hasparent(&mp->m_sb)) {
+ if (first_parent)
+ error = xfs_parent_create(tp, tdp, sip, target_name,
+ diroffset, &dfops,
+ &first_block);
+ else
+ error = xfs_parent_add(tp, tdp, sip, target_name,
+ diroffset, &dfops,
+ &first_block);
+ if (error)
+ goto out_defer_cancel;
+ }
+
+ /*
+ * If this is a synchronous mount, make sure that the link transaction
+ * goes to disk before returning to the user.
*/
if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC))
xfs_trans_set_sync(tp);
error = xfs_defer_finish(&tp, &dfops);
- if (error) {
- xfs_defer_cancel(&dfops);
- goto error_return;
- }
+ if (error)
+ goto out_defer_cancel;
return xfs_trans_commit(tp);
- error_return:
+out_defer_cancel:
+ xfs_defer_cancel(&dfops);
+error_return:
xfs_trans_cancel(tp);
- std_return:
+std_return:
return error;
}
--
2.7.4
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