[PATCH 11/11] ext4: fix ext_remove_space for punch_hole case
From: Dmitry Monakhov <hidden>
Date: 2012-09-28 15:44:35
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
Inode is allowed to have empty leaf only if it this is blockless inode. Signed-off-by: Dmitry Monakhov <redacted> --- fs/ext4/extents.c | 16 +++++++++------- 1 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index a1d16eb..5ed6e86 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c@@ -2589,7 +2589,7 @@ static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start, struct ext4_ext_path *path = NULL; ext4_fsblk_t partial_cluster = 0; handle_t *handle; - int i = 0, err; + int i = 0, err = 0; ext_debug("truncate since %u to %u\n", start, end);
@@ -2621,12 +2621,16 @@ again: return PTR_ERR(path); } depth = ext_depth(inode); + /* Leaf not may not exist only if inode has no blocks at all */ ex = path[depth].p_ext; if (!ex) { - ext4_ext_drop_refs(path); - kfree(path); - path = NULL; - goto cont; + if (depth) { + EXT4_ERROR_INODE(inode, + "path[%d].p_hdr == NULL", + depth); + err = -EIO; + } + goto out; } ee_block = le32_to_cpu(ex->ee_block);
@@ -2658,8 +2662,6 @@ again: goto out; } } -cont: