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btrfs: make buffer_radix take sector size units

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For subpage sector size support, one page can contain multiple tree
blocks. The entries cannot be based on page size and index must be
derived from the sectorsize. No change for page size == sector size.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2020-10-21 14:25:05 +08:00 committed by David Sterba
parent 0d01e247a0
commit 478ef8868f
2 changed files with 5 additions and 4 deletions
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1
fs/btrfs/ctree.h
View File

@ -912,6 +912,7 @@ struct btrfs_fs_info {
/* Extent buffer radix tree */
spinlock_t buffer_lock;
/* Entries are eb->start / sectorsize */
struct radix_tree_root buffer_radix;
/* next backup root to be overwritten */

8
fs/btrfs/extent_io.c
View File

@ -5107,7 +5107,7 @@ struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
rcu_read_lock();
eb = radix_tree_lookup(&fs_info->buffer_radix,
start >> PAGE_SHIFT);
start >> fs_info->sectorsize_bits);
if (eb && atomic_inc_not_zero(&eb->refs)) {
rcu_read_unlock();
/*
@ -5159,7 +5159,7 @@ again:
}
spin_lock(&fs_info->buffer_lock);
ret = radix_tree_insert(&fs_info->buffer_radix,
start >> PAGE_SHIFT, eb);
start >> fs_info->sectorsize_bits, eb);
spin_unlock(&fs_info->buffer_lock);
radix_tree_preload_end();
if (ret == -EEXIST) {
@ -5267,7 +5267,7 @@ again:
spin_lock(&fs_info->buffer_lock);
ret = radix_tree_insert(&fs_info->buffer_radix,
start >> PAGE_SHIFT, eb);
start >> fs_info->sectorsize_bits, eb);
spin_unlock(&fs_info->buffer_lock);
radix_tree_preload_end();
if (ret == -EEXIST) {
@ -5323,7 +5323,7 @@ static int release_extent_buffer(struct extent_buffer *eb)
spin_lock(&fs_info->buffer_lock);
radix_tree_delete(&fs_info->buffer_radix,
eb->start >> PAGE_SHIFT);
eb->start >> fs_info->sectorsize_bits);
spin_unlock(&fs_info->buffer_lock);
} else {
spin_unlock(&eb->refs_lock);