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btrfs: Cleanup compress_file_range()

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Remove unnecessary checks in compress_file_range().

Signed-off-by: Ashish Samant <ashish.samant@oracle.com>
[ minor coding style fixups ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Ashish Samant 2016-03-25 19:01:33 -07:00 committed by David Sterba
parent 6f034ece34
commit c8bb0c8bd2
1 changed files with 35 additions and 37 deletions
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72
fs/btrfs/inode.c
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@ -585,9 +585,27 @@ static noinline void compress_file_range(struct inode *inode,
will_compress = 0;
} else {
num_bytes = total_in;
*num_added += 1;
/*
* The async work queues will take care of doing actual
* allocation on disk for these compressed pages, and
* will submit them to the elevator.
*/
add_async_extent(async_cow, start, num_bytes,
total_compressed, pages, nr_pages_ret,
compress_type);
if (start + num_bytes < end) {
start += num_bytes;
pages = NULL;
cond_resched();
goto again;
}
return;
}
}
if (!will_compress && pages) {
if (pages) {
/*
* the compression code ran but failed to make things smaller,
* free any pages it allocated and our page pointer array
@ -607,43 +625,23 @@ static noinline void compress_file_range(struct inode *inode,
BTRFS_I(inode)->flags |= BTRFS_INODE_NOCOMPRESS;
}
}
if (will_compress) {
*num_added += 1;
/* the async work queues will take care of doing actual
* allocation on disk for these compressed pages,
* and will submit them to the elevator.
*/
add_async_extent(async_cow, start, num_bytes,
total_compressed, pages, nr_pages_ret,
compress_type);
if (start + num_bytes < end) {
start += num_bytes;
pages = NULL;
cond_resched();
goto again;
}
} else {
cleanup_and_bail_uncompressed:
/*
* No compression, but we still need to write the pages in
* the file we've been given so far. redirty the locked
* page if it corresponds to our extent and set things up
* for the async work queue to run cow_file_range to do
* the normal delalloc dance
*/
if (page_offset(locked_page) >= start &&
page_offset(locked_page) <= end) {
__set_page_dirty_nobuffers(locked_page);
/* unlocked later on in the async handlers */
}
if (redirty)
extent_range_redirty_for_io(inode, start, end);
add_async_extent(async_cow, start, end - start + 1,
0, NULL, 0, BTRFS_COMPRESS_NONE);
*num_added += 1;
}
/*
* No compression, but we still need to write the pages in the file
* we've been given so far. redirty the locked page if it corresponds
* to our extent and set things up for the async work queue to run
* cow_file_range to do the normal delalloc dance.
*/
if (page_offset(locked_page) >= start &&
page_offset(locked_page) <= end)
__set_page_dirty_nobuffers(locked_page);
/* unlocked later on in the async handlers */
if (redirty)
extent_range_redirty_for_io(inode, start, end);
add_async_extent(async_cow, start, end - start + 1, 0, NULL, 0,
BTRFS_COMPRESS_NONE);
*num_added += 1;
return;