diff options
Diffstat (limited to 'fs/ext4/extents_status.c')
| -rw-r--r-- | fs/ext4/extents_status.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index ded2615b63e0..1dc5df016e25 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -419,7 +419,7 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode, unsigned short ee_len; int depth, ee_status, es_status; - path = ext4_ext_find_extent(inode, es->es_lblk, NULL); + path = ext4_ext_find_extent(inode, es->es_lblk, NULL, EXT4_EX_NOCACHE); if (IS_ERR(path)) return; @@ -684,6 +684,41 @@ error: } /* + * ext4_es_cache_extent() inserts information into the extent status + * tree if and only if there isn't information about the range in + * question already. + */ +void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk, + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned int status) +{ + struct extent_status *es; + struct extent_status newes; + ext4_lblk_t end = lblk + len - 1; + + newes.es_lblk = lblk; + newes.es_len = len; + ext4_es_store_pblock(&newes, pblk); + ext4_es_store_status(&newes, status); + trace_ext4_es_cache_extent(inode, &newes); + + if (!len) + return; + + BUG_ON(end < lblk); + + write_lock(&EXT4_I(inode)->i_es_lock); + + es = __es_tree_search(&EXT4_I(inode)->i_es_tree.root, lblk); + if (es && ((es->es_lblk <= lblk) || (es->es_lblk <= end))) + goto out; + + __es_insert_extent(inode, &newes); +out: + write_unlock(&EXT4_I(inode)->i_es_lock); +} + +/* * ext4_es_lookup_extent() looks up an extent in extent status tree. * * ext4_es_lookup_extent is called by ext4_map_blocks/ext4_da_map_blocks. |