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| author | Zheng Liu <wenqing.lz@taobao.com> | 2013-02-18 09:26:51 +0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-02-18 09:26:51 +0400 |
| commit | 06b0c886214a223dde7b21cbfc3008fd20a8ce16 (patch) | |
| tree | c1d3c51622e2a885446e8d617b953405412fc3aa /fs/ext4/file.c | |
| parent | 0f70b40613ee14b0cadafeb461034cff81b4419a (diff) | |
| download | linux-06b0c886214a223dde7b21cbfc3008fd20a8ce16.tar.xz | |
ext4: refine extent status tree
This commit refines the extent status tree code.
1) A prefix 'es_' is added to to the extent status tree structure
members.
2) Refactored es_remove_extent() so that __es_remove_extent() can be
used by es_insert_extent() to remove the old extent entry(-ies) before
inserting a new one.
3) Rename extent_status_end() to ext4_es_end()
4) ext4_es_can_be_merged() is define to check whether two extents can
be merged or not.
5) Update and clarified comments.
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4/file.c')
| -rw-r--r-- | fs/ext4/file.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 2cf8ab810687..2df9354b105e 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -464,10 +464,9 @@ static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize) * If there is a delay extent at this offset, * it will be as a data. */ - es.start = last; + es.es_lblk = last; (void)ext4_es_find_extent(inode, &es); - if (last >= es.start && - last < es.start + es.len) { + if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) { if (last != start) dataoff = last << blkbits; break; @@ -549,11 +548,10 @@ static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize) * If there is a delay extent at this offset, * we will skip this extent. */ - es.start = last; + es.es_lblk = last; (void)ext4_es_find_extent(inode, &es); - if (last >= es.start && - last < es.start + es.len) { - last = es.start + es.len; + if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) { + last = es.es_lblk + es.es_len; holeoff = last << blkbits; continue; } |