Hi,
This patch introduces a btrfs_iget helper to be used in NFS support.
This applies to kernel-unstable/tip.
---
Signed-off-by: Balaji Rao <balajirrao@xxxxxxxxx>
diff -r 179ee631a0fc ctree.h
--- a/ctree.h Fri Jul 18 20:42:20 2008 -0400
+++ b/ctree.h Mon Jul 21 01:44:54 2008 +0530
@@ -1630,6 +1630,8 @@
struct btrfs_root *root);
struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
u64 root_objectid);
+struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
+ struct btrfs_root *root, int *is_new);
int btrfs_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to);
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
diff -r 179ee631a0fc inode.c
--- a/inode.c Fri Jul 18 20:42:20 2008 -0400
+++ b/inode.c Mon Jul 21 01:44:54 2008 +0530
@@ -1651,6 +1651,33 @@
return inode;
}
+/* Get an inode object given its location and corresponding root.
+ * Returns in *is_new if the inode was read from disk
+ */
+struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
+ struct btrfs_root *root, int *is_new)
+{
+ struct inode *inode;
+
+ inode = btrfs_iget_locked(s, location->objectid, root);
+ if (!inode)
+ return ERR_PTR(-EACCES);
+
+ if (inode->i_state & I_NEW) {
+ BTRFS_I(inode)->root = root;
+ memcpy(&BTRFS_I(inode)->location, location, sizeof(*location));
+ btrfs_read_locked_inode(inode);
+ unlock_new_inode(inode);
+ if (is_new)
+ *is_new = 1;
+ } else {
+ if (is_new)
+ *is_new = 0;
+ }
+
+ return inode;
+}
+
static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
@@ -1659,7 +1686,7 @@
struct btrfs_root *root = bi->root;
struct btrfs_root *sub_root = root;
struct btrfs_key location;
- int ret;
+ int ret, new;
if (dentry->d_name.len > BTRFS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
@@ -1677,21 +1704,14 @@
return ERR_PTR(ret);
if (ret > 0)
return ERR_PTR(-ENOENT);
- inode = btrfs_iget_locked(dir->i_sb, location.objectid,
- sub_root);
- if (!inode)
- return ERR_PTR(-EACCES);
- if (inode->i_state & I_NEW) {
- /* the inode and parent dir are two different roots */
- if (sub_root != root) {
- igrab(inode);
- sub_root->inode = inode;
- }
- BTRFS_I(inode)->root = sub_root;
- memcpy(&BTRFS_I(inode)->location, &location,
- sizeof(location));
- btrfs_read_locked_inode(inode);
- unlock_new_inode(inode);
+ inode = btrfs_iget(dir->i_sb, &location, sub_root, &new);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+
+ /* the inode and parent dir are two different roots */
+ if (new && root != sub_root) {
+ igrab(inode);
+ sub_root->inode = inode;
}
}
return d_splice_alias(inode, dentry);
--
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