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btrfs: pass the new logical address to split_extent_map

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split_extent_map splits off the first chunk of an extent map into a new
one.  One of the two users is the zoned I/O completion code that wants to
rewrite the logical block start address right after this split.  Pass in
the logical address to be set in the split off first extent_map as an
argument to avoid an extra extent tree lookup for this case.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2023-05-24 17:03:17 +02:00 committed by David Sterba
parent 71df088c1c
commit f000bc6fe4
4 changed files with 11 additions and 9 deletions
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8
fs/btrfs/extent_map.c
View File

@ -963,11 +963,13 @@ int btrfs_replace_extent_map_range(struct btrfs_inode *inode,
}
/*
* Split off the first pre bytes from the extent_map at [start, start + len]
* Split off the first pre bytes from the extent_map at [start, start + len],
* and set the block_start for it to new_logical.
*
* This function is used when an ordered_extent needs to be split.
*/
int split_extent_map(struct btrfs_inode *inode, u64 start, u64 len, u64 pre)
int split_extent_map(struct btrfs_inode *inode, u64 start, u64 len, u64 pre,
u64 new_logical)
{
struct extent_map_tree *em_tree = &inode->extent_tree;
struct extent_map *em;
@ -1010,7 +1012,7 @@ int split_extent_map(struct btrfs_inode *inode, u64 start, u64 len, u64 pre)
split_pre->start = em->start;
split_pre->len = pre;
split_pre->orig_start = split_pre->start;
split_pre->block_start = em->block_start;
split_pre->block_start = new_logical;
split_pre->block_len = split_pre->len;
split_pre->orig_block_len = split_pre->block_len;
split_pre->ram_bytes = split_pre->len;

3
fs/btrfs/extent_map.h
View File

@ -90,7 +90,8 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
int add_extent_mapping(struct extent_map_tree *tree,
struct extent_map *em, int modified);
void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
int split_extent_map(struct btrfs_inode *inode, u64 start, u64 len, u64 pre);
int split_extent_map(struct btrfs_inode *inode, u64 start, u64 len, u64 pre,
u64 new_logical);
struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);

3
fs/btrfs/inode.c
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@ -2736,7 +2736,8 @@ static int btrfs_extract_ordered_extent(struct btrfs_bio *bbio,
*/
if (!test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags)) {
ret = split_extent_map(bbio->inode, bbio->file_offset,
ordered->num_bytes, len);
ordered->num_bytes, len,
ordered->disk_bytenr);
if (ret)
return ret;
}

6
fs/btrfs/zoned.c
View File

@ -1689,15 +1689,13 @@ static bool btrfs_zoned_split_ordered(struct btrfs_ordered_extent *ordered,
if (!test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags) &&
split_extent_map(BTRFS_I(ordered->inode), ordered->file_offset,
ordered->num_bytes, len))
ordered->num_bytes, len, logical))
return false;
new = btrfs_split_ordered_extent(ordered, len);
if (IS_ERR(new))
return false;
if (new->disk_bytenr != logical)
btrfs_rewrite_logical_zoned(new, logical);
new->disk_bytenr = logical;
btrfs_finish_one_ordered(new);
return true;
}