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| author | Zheng Liu <wenqing.lz@taobao.com> | 2013-02-18 00:27:26 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-02-18 00:27:26 -0500 |
| commit | be401363ac5ec652c706263a59b0bd0acc3612e8 (patch) | |
| tree | 64a7f85c2e1a0157a3ca740e4afc99260d8938c9 /fs/ext4/extents_status.c | |
| parent | fdc0212e86ca15c5cfed77088af7cc5eb79ccbc7 (diff) | |
| download | linux-be401363ac5ec652c706263a59b0bd0acc3612e8.tar.gz | |
ext4: rename and improbe ext4_es_find_extent()
This commit renames ext4_es_find_extent with ext4_es_find_delayed_extent
and improve this function. First, we split input and output parameter.
Second, this function never return the first block of the next delayed
extent after 'es'.
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Jan kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4/extents_status.c')
| -rw-r--r-- | fs/ext4/extents_status.c | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 1f5fd44993e909..76f4351ea82183 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -229,59 +229,59 @@ static struct extent_status *__es_tree_search(struct rb_root *root, } /* - * ext4_es_find_extent: find the 1st delayed extent covering @es->lblk + * ext4_es_find_delayed_extent: find the 1st delayed extent covering @es->lblk * if it exists, otherwise, the next extent after @es->lblk. * * @inode: the inode which owns delayed extents + * @lblk: the offset where we start to search * @es: delayed extent that we found - * - * Returns the first block of the next extent after es, otherwise - * EXT_MAX_BLOCKS if no extent is found. - * Delayed extent is returned via @es. */ -ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es) +void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk, + struct extent_status *es) { struct ext4_es_tree *tree = NULL; struct extent_status *es1 = NULL; struct rb_node *node; - ext4_lblk_t ret = EXT_MAX_BLOCKS; - trace_ext4_es_find_extent_enter(inode, es->es_lblk); + BUG_ON(es == NULL); + trace_ext4_es_find_delayed_extent_enter(inode, lblk); read_lock(&EXT4_I(inode)->i_es_lock); tree = &EXT4_I(inode)->i_es_tree; /* find extent in cache firstly */ - es->es_len = es->es_pblk = 0; + es->es_lblk = es->es_len = es->es_pblk = 0; if (tree->cache_es) { es1 = tree->cache_es; - if (in_range(es->es_lblk, es1->es_lblk, es1->es_len)) { + if (in_range(lblk, es1->es_lblk, es1->es_len)) { es_debug("%u cached by [%u/%u) %llu %llx\n", - es->es_lblk, es1->es_lblk, es1->es_len, + lblk, es1->es_lblk, es1->es_len, ext4_es_pblock(es1), ext4_es_status(es1)); goto out; } } - es1 = __es_tree_search(&tree->root, es->es_lblk); + es1 = __es_tree_search(&tree->root, lblk); out: - if (es1) { + if (es1 && !ext4_es_is_delayed(es1)) { + while ((node = rb_next(&es1->rb_node)) != NULL) { + es1 = rb_entry(node, struct extent_status, rb_node); + if (ext4_es_is_delayed(es1)) + break; + } + } + + if (es1 && ext4_es_is_delayed(es1)) { tree->cache_es = es1; es->es_lblk = es1->es_lblk; es->es_len = es1->es_len; es->es_pblk = es1->es_pblk; - node = rb_next(&es1->rb_node); - if (node) { - es1 = rb_entry(node, struct extent_status, rb_node); - ret = es1->es_lblk; - } } read_unlock(&EXT4_I(inode)->i_es_lock); - trace_ext4_es_find_extent_exit(inode, es, ret); - return ret; + trace_ext4_es_find_delayed_extent_exit(inode, es); } static struct extent_status * |