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btrfs: set EXTENT_NORESERVE bits side btrfs_dirty_pages() 

Set the extent bits EXTENT_NORESERVE inside btrfs_dirty_pages() as
opposed to calling set_extent_bits again later.

Fold check for written length within the function.

Note: EXTENT_NORESERVE is set before unlocking extents.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Goldwyn Rodrigues 2020-10-14 09:55:45 -05:00 committed by David Sterba
parent 13f0dd8f78
commit aa8c1a41a1
3 changed files with 12 additions and 18 deletions
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2
fs/btrfs/ctree.h
View File

@ -3112,7 +3112,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
int btrfs_release_file(struct inode *inode, struct file *file);
int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
size_t num_pages, loff_t pos, size_t write_bytes,
struct extent_state **cached);
struct extent_state **cached, bool noreserve);
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
size_t *write_bytes);

22
fs/btrfs/file.c
View File

@ -462,7 +462,7 @@ static void btrfs_drop_pages(struct page **pages, size_t num_pages)
*/
int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
size_t num_pages, loff_t pos, size_t write_bytes,
struct extent_state **cached)
struct extent_state **cached, bool noreserve)
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
int err = 0;
@ -474,6 +474,12 @@ int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages,
loff_t isize = i_size_read(&inode->vfs_inode);
unsigned int extra_bits = 0;
if (write_bytes == 0)
return 0;
if (noreserve)
extra_bits |= EXTENT_NORESERVE;
start_pos = round_down(pos, fs_info->sectorsize);
num_bytes = round_up(write_bytes + pos - start_pos,
fs_info->sectorsize);
@ -1720,10 +1726,9 @@ again:
release_bytes = round_up(copied + sector_offset,
fs_info->sectorsize);
if (copied > 0)
ret = btrfs_dirty_pages(BTRFS_I(inode), pages,
dirty_pages, pos, copied,
&cached_state);
&cached_state, only_release_metadata);
/*
* If we have not locked the extent range, because the range's
@ -1748,17 +1753,6 @@ again:
if (only_release_metadata)
btrfs_check_nocow_unlock(BTRFS_I(inode));
if (only_release_metadata && copied > 0) {
lockstart = round_down(pos,
fs_info->sectorsize);
lockend = round_up(pos + copied,
fs_info->sectorsize) - 1;
set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
lockend, EXTENT_NORESERVE, NULL,
NULL, GFP_NOFS);
}
btrfs_drop_pages(pages, num_pages);
cond_resched();

2
fs/btrfs/free-space-cache.c
View File

@ -1332,7 +1332,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
/* Everything is written out, now we dirty the pages in the file. */
ret = btrfs_dirty_pages(BTRFS_I(inode), io_ctl->pages,
io_ctl->num_pages, 0, i_size_read(inode),
&cached_state);
&cached_state, false);
if (ret)
goto out_nospc;