Btrfs: drop dir i_size when adding new names on replay
So if we have dir_index items in the log that means we also have the inode item
as well, which means that the inode's i_size is correct. However when we
process dir_index'es we call btrfs_add_link() which will increase the
directory's i_size for the new entry. To fix this we need to just set the dir
items i_size to 0, and then as we find dir_index items we adjust the i_size.
btrfs_add_link() will do it for new entries, and if the entry already exists we
can just add the name_len to the i_size ourselves. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index c91309d..79f057c 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -394,6 +394,7 @@
if (inode_item) {
struct btrfs_inode_item *item;
u64 nbytes;
+ u32 mode;
item = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_inode_item);
@@ -401,9 +402,19 @@
item = btrfs_item_ptr(eb, slot,
struct btrfs_inode_item);
btrfs_set_inode_nbytes(eb, item, nbytes);
+
+ /*
+ * If this is a directory we need to reset the i_size to
+ * 0 so that we can set it up properly when replaying
+ * the rest of the items in this log.
+ */
+ mode = btrfs_inode_mode(eb, item);
+ if (S_ISDIR(mode))
+ btrfs_set_inode_size(eb, item, 0);
}
} else if (inode_item) {
struct btrfs_inode_item *item;
+ u32 mode;
/*
* New inode, set nbytes to 0 so that the nbytes comes out
@@ -411,6 +422,15 @@
*/
item = btrfs_item_ptr(eb, slot, struct btrfs_inode_item);
btrfs_set_inode_nbytes(eb, item, 0);
+
+ /*
+ * If this is a directory we need to reset the i_size to 0 so
+ * that we can set it up properly when replaying the rest of
+ * the items in this log.
+ */
+ mode = btrfs_inode_mode(eb, item);
+ if (S_ISDIR(mode))
+ btrfs_set_inode_size(eb, item, 0);
}
insert:
btrfs_release_path(path);
@@ -1497,6 +1517,7 @@
iput(inode);
return -EIO;
}
+
ret = btrfs_add_link(trans, dir, inode, name, name_len, 1, index);
/* FIXME, put inode into FIXUP list */
@@ -1535,6 +1556,7 @@
u8 log_type;
int exists;
int ret = 0;
+ bool update_size = (key->type == BTRFS_DIR_INDEX_KEY);
dir = read_one_inode(root, key->objectid);
if (!dir)
@@ -1605,6 +1627,10 @@
goto insert;
out:
btrfs_release_path(path);
+ if (!ret && update_size) {
+ btrfs_i_size_write(dir, dir->i_size + name_len * 2);
+ ret = btrfs_update_inode(trans, root, dir);
+ }
kfree(name);
iput(dir);
return ret;
@@ -1615,6 +1641,7 @@
name, name_len, log_type, &log_key);
if (ret && ret != -ENOENT)
goto out;
+ update_size = false;
ret = 0;
goto out;
}
