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btrfs: zoned: encapsulate inode locking for zoned relocation

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Encapsulate the inode lock needed for serializing the data relocation
writes on a zoned filesystem into a helper.

This streamlines the code reading flow and hides special casing for
zoned filesystems.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2021-12-07 06:28:34 -08:00 committed by David Sterba
parent a26d60dedf
commit 869f4cdc73
2 changed files with 19 additions and 6 deletions
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8
fs/btrfs/extent_io.c
View File

@ -5184,8 +5184,6 @@ int extent_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
struct inode *inode = mapping->host;
const bool data_reloc = btrfs_is_data_reloc_root(BTRFS_I(inode)->root);
const bool zoned = btrfs_is_zoned(BTRFS_I(inode)->root->fs_info);
int ret = 0;
struct extent_page_data epd = {
.bio_ctrl = { 0 },
@ -5197,11 +5195,9 @@ int extent_writepages(struct address_space *mapping,
* Allow only a single thread to do the reloc work in zoned mode to
* protect the write pointer updates.
*/
if (data_reloc && zoned)
btrfs_inode_lock(inode, 0);
btrfs_zoned_data_reloc_lock(BTRFS_I(inode));
ret = extent_write_cache_pages(mapping, wbc, &epd);
if (data_reloc && zoned)
btrfs_inode_unlock(inode, 0);
btrfs_zoned_data_reloc_unlock(BTRFS_I(inode));
ASSERT(ret <= 0);
if (ret < 0) {
end_write_bio(&epd, ret);

17
fs/btrfs/zoned.h
View File

@ -8,6 +8,7 @@
#include "volumes.h"
#include "disk-io.h"
#include "block-group.h"
#include "btrfs_inode.h"
/*
* Block groups with more than this value (percents) of unusable space will be
@ -354,4 +355,20 @@ static inline void btrfs_clear_treelog_bg(struct btrfs_block_group *bg)
spin_unlock(&fs_info->treelog_bg_lock);
}
static inline void btrfs_zoned_data_reloc_lock(struct btrfs_inode *inode)
{
struct btrfs_root *root = inode->root;
if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
btrfs_inode_lock(&inode->vfs_inode, 0);
}
static inline void btrfs_zoned_data_reloc_unlock(struct btrfs_inode *inode)
{
struct btrfs_root *root = inode->root;
if (btrfs_is_data_reloc_root(root) && btrfs_is_zoned(root->fs_info))
btrfs_inode_unlock(&inode->vfs_inode, 0);
}
#endif