tree: git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
head: 30f902f3886fbefe89641e9edc06d1f0e2fc2280
commit: 00532604c72e159a6d7b28b9bc9f7e364e396bee [21/25] ext4: introduce new
i_write_mutex to protect fallocate
>> fs/ext4/extents.c:5442:2-8: preceding lock on line 5421
git remote add ext4 git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git
git remote update ext4
git checkout 00532604c72e159a6d7b28b9bc9f7e364e396bee
vim +5442 fs/ext4/extents.c
0a04b248 Namjae Jeon 2014-04-19 5415
9eb79482 Namjae Jeon 2014-02-23 5416 trace_ext4_collapse_range(inode,
offset, len);
9eb79482 Namjae Jeon 2014-02-23 5417
9eb79482 Namjae Jeon 2014-02-23 5418 punch_start = offset >>
EXT4_BLOCK_SIZE_BITS(sb);
9eb79482 Namjae Jeon 2014-02-23 5419 punch_stop = (offset + len) >>
EXT4_BLOCK_SIZE_BITS(sb);
9eb79482 Namjae Jeon 2014-02-23 5420
00532604 Namjae Jeon 2014-05-26 @5421
mutex_lock(&EXT4_I(inode)->i_write_mutex);
00532604 Namjae Jeon 2014-05-26 5422
1ce01c4a Namjae Jeon 2014-04-10 5423 /* Call ext4_force_commit to flush all
data in case of data=journal. */
1ce01c4a Namjae Jeon 2014-04-10 5424 if (ext4_should_journal_data(inode)) {
1ce01c4a Namjae Jeon 2014-04-10 5425 ret =
ext4_force_commit(inode->i_sb);
00532604 Namjae Jeon 2014-05-26 5426 if (ret) {
00532604 Namjae Jeon 2014-05-26 5427
mutex_unlock(&EXT4_I(inode)->i_write_mutex);
1ce01c4a Namjae Jeon 2014-04-10 5428 return ret;
00532604 Namjae Jeon 2014-05-26 5429 }
1ce01c4a Namjae Jeon 2014-04-10 5430 }
1ce01c4a Namjae Jeon 2014-04-10 5431
a8680e0d Namjae Jeon 2014-04-19 5432 /*
a8680e0d Namjae Jeon 2014-04-19 5433 * Need to round down offset to be
aligned with page size boundary
a8680e0d Namjae Jeon 2014-04-19 5434 * for page size > block size.
a8680e0d Namjae Jeon 2014-04-19 5435 */
a8680e0d Namjae Jeon 2014-04-19 5436 ioffset = round_down(offset, PAGE_SIZE);
a8680e0d Namjae Jeon 2014-04-19 5437
9eb79482 Namjae Jeon 2014-02-23 5438 /* Write out all dirty pages */
a8680e0d Namjae Jeon 2014-04-19 5439 ret =
filemap_write_and_wait_range(inode->i_mapping, ioffset,
a8680e0d Namjae Jeon 2014-04-19 5440
LLONG_MAX);
9eb79482 Namjae Jeon 2014-02-23 5441 if (ret)
9eb79482 Namjae Jeon 2014-02-23 @5442 return ret;
9eb79482 Namjae Jeon 2014-02-23 5443
9eb79482 Namjae Jeon 2014-02-23 5444 /* Take mutex lock */
9eb79482 Namjae Jeon 2014-02-23 5445 mutex_lock(&inode->i_mutex);
---
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