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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b62c1a87ed6b..783c883d4d5e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -550,10 +550,13 @@ static int ext4_map_query_blocks(handle_t *handle, struct inode *inode,
retval = ext4_ext_map_blocks(handle, inode, map, flags);
else
retval = ext4_ind_map_blocks(handle, inode, map, flags);
-
- if (retval <= 0)
+ if (retval < 0)
return retval;
+ /* A hole? */
+ if (retval == 0)
+ goto out;
+
if (unlikely(retval != map->m_len)) {
ext4_warning(inode->i_sb,
"ES len assertion failed for inode "
@@ -573,11 +576,13 @@ static int ext4_map_query_blocks(handle_t *handle, struct inode *inode,
EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
map->m_pblk, status, false);
- return retval;
+ } else {
+ retval = ext4_map_query_blocks_next_in_leaf(handle, inode, map,
+ orig_mlen);
}
-
- return ext4_map_query_blocks_next_in_leaf(handle, inode, map,
- orig_mlen);
+out:
+ map->m_seq = READ_ONCE(EXT4_I(inode)->i_es_seq);
+ return retval;
}
static int ext4_map_create_blocks(handle_t *handle, struct inode *inode,
@@ -649,7 +654,7 @@ static int ext4_map_create_blocks(handle_t *handle, struct inode *inode,
* extent status tree.
*/
if (flags & EXT4_GET_BLOCKS_PRE_IO &&
- ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, NULL)) {
+ ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, &map->m_seq)) {
if (ext4_es_is_written(&es))
return retval;
}
@@ -658,6 +663,7 @@ static int ext4_map_create_blocks(handle_t *handle, struct inode *inode,
EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
ext4_es_insert_extent(inode, map->m_lblk, map->m_len, map->m_pblk,
status, flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE);
+ map->m_seq = READ_ONCE(EXT4_I(inode)->i_es_seq);
return retval;
}
@@ -723,7 +729,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
ext4_check_map_extents_env(inode);
/* Lookup extent status tree firstly */
- if (ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, NULL)) {
+ if (ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es, &map->m_seq)) {
if (ext4_es_is_written(&es) || ext4_es_is_unwritten(&es)) {
map->m_pblk = ext4_es_pblock(&es) +
map->m_lblk - es.es_lblk;
@@ -1979,6 +1985,8 @@ add_delayed:
map->m_flags |= EXT4_MAP_DELAYED;
retval = ext4_insert_delayed_blocks(inode, map->m_lblk, map->m_len);
+ if (!retval)
+ map->m_seq = READ_ONCE(EXT4_I(inode)->i_es_seq);
up_write(&EXT4_I(inode)->i_data_sem);
return retval;