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ext4: move setting of trimmed bit into ext4_try_to_trim_range()

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[ Upstream commit 45e4ab320c9b5fa67b1fc3b6a9b381cfcc0c8488 ]

Currently we set the group's trimmed bit in ext4_trim_all_free() based
on return value of ext4_try_to_trim_range(). However when we will want
to abort trimming because of suspend attempt, we want to return success
from ext4_try_to_trim_range() but not set the trimmed bit. Instead
implementing awkward propagation of this information, just move setting
of trimmed bit into ext4_try_to_trim_range() when the whole group is
trimmed.

Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230913150504.9054-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jan Kara 2023-09-13 17:04:54 +02:00 committed by Greg Kroah-Hartman
parent 767a50bef2
commit 4db34feaf2
1 changed files with 25 additions and 21 deletions
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46
fs/ext4/mballoc.c
View File

@ -5194,14 +5194,27 @@ __acquires(bitlock)
return ret;
}
static ext4_grpblk_t ext4_last_grp_cluster(struct super_block *sb,
ext4_group_t grp)
{
if (grp < ext4_get_groups_count(sb))
return EXT4_CLUSTERS_PER_GROUP(sb) - 1;
return (ext4_blocks_count(EXT4_SB(sb)->s_es) -
ext4_group_first_block_no(sb, grp) - 1) >>
EXT4_CLUSTER_BITS(sb);
}
static int ext4_try_to_trim_range(struct super_block *sb,
struct ext4_buddy *e4b, ext4_grpblk_t start,
ext4_grpblk_t max, ext4_grpblk_t minblocks)
{
ext4_grpblk_t next, count, free_count;
bool set_trimmed = false;
void *bitmap;
bitmap = e4b->bd_bitmap;
if (start == 0 && max >= ext4_last_grp_cluster(sb, e4b->bd_group))
set_trimmed = true;
start = max(e4b->bd_info->bb_first_free, start);
count = 0;
free_count = 0;
@ -5216,16 +5229,14 @@ static int ext4_try_to_trim_range(struct super_block *sb,
int ret = ext4_trim_extent(sb, start, next - start, e4b);
if (ret && ret != -EOPNOTSUPP)
break;
return count;
count += next - start;
}
free_count += next - start;
start = next + 1;
if (fatal_signal_pending(current)) {
count = -ERESTARTSYS;
break;
}
if (fatal_signal_pending(current))
return -ERESTARTSYS;
if (need_resched()) {
ext4_unlock_group(sb, e4b->bd_group);
@ -5237,6 +5248,9 @@ static int ext4_try_to_trim_range(struct super_block *sb,
break;
}
if (set_trimmed)
EXT4_MB_GRP_SET_TRIMMED(e4b->bd_info);
return count;
}
@ -5247,7 +5261,6 @@ static int ext4_try_to_trim_range(struct super_block *sb,
* @start: first group block to examine
* @max: last group block to examine
* @minblocks: minimum extent block count
* @set_trimmed: set the trimmed flag if at least one block is trimmed
*
* ext4_trim_all_free walks through group's buddy bitmap searching for free
* extents. When the free block is found, ext4_trim_extent is called to TRIM
@ -5262,7 +5275,7 @@ static int ext4_try_to_trim_range(struct super_block *sb,
static ext4_grpblk_t
ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
ext4_grpblk_t start, ext4_grpblk_t max,
ext4_grpblk_t minblocks, bool set_trimmed)
ext4_grpblk_t minblocks)
{
struct ext4_buddy e4b;
int ret;
@ -5279,13 +5292,10 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
ext4_lock_group(sb, group);
if (!EXT4_MB_GRP_WAS_TRIMMED(e4b.bd_info) ||
minblocks < EXT4_SB(sb)->s_last_trim_minblks) {
minblocks < EXT4_SB(sb)->s_last_trim_minblks)
ret = ext4_try_to_trim_range(sb, &e4b, start, max, minblocks);
if (ret >= 0 && set_trimmed)
EXT4_MB_GRP_SET_TRIMMED(e4b.bd_info);
} else {
else
ret = 0;
}
ext4_unlock_group(sb, group);
ext4_mb_unload_buddy(&e4b);
@ -5318,7 +5328,6 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
ext4_fsblk_t first_data_blk =
le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block);
ext4_fsblk_t max_blks = ext4_blocks_count(EXT4_SB(sb)->s_es);
bool whole_group, eof = false;
int ret = 0;
start = range->start >> sb->s_blocksize_bits;
@ -5337,10 +5346,8 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
if (minlen > EXT4_CLUSTERS_PER_GROUP(sb))
goto out;
}
if (end >= max_blks - 1) {
if (end >= max_blks - 1)
end = max_blks - 1;
eof = true;
}
if (end <= first_data_blk)
goto out;
if (start < first_data_blk)
@ -5354,7 +5361,6 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
/* end now represents the last cluster to discard in this group */
end = EXT4_CLUSTERS_PER_GROUP(sb) - 1;
whole_group = true;
for (group = first_group; group <= last_group; group++) {
grp = ext4_get_group_info(sb, group);
@ -5371,13 +5377,11 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
* change it for the last group, note that last_cluster is
* already computed earlier by ext4_get_group_no_and_offset()
*/
if (group == last_group) {
if (group == last_group)
end = last_cluster;
whole_group = eof ? true : end == EXT4_CLUSTERS_PER_GROUP(sb) - 1;
}
if (grp->bb_free >= minlen) {
cnt = ext4_trim_all_free(sb, group, first_cluster,
end, minlen, whole_group);
end, minlen);
if (cnt < 0) {
ret = cnt;
break;