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-rw-r--r--fs/f2fs/gc.c117
1 files changed, 68 insertions, 49 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 28a8c79c8bdc..f3c45ec2a7e7 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -13,6 +13,7 @@
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/freezer.h>
+#include <linux/sched/signal.h>
#include "f2fs.h"
#include "node.h"
@@ -1405,12 +1406,29 @@ void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
}
-static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
- unsigned int end)
+static int free_segment_range(struct f2fs_sb_info *sbi,
+ unsigned int secs, bool gc_only)
{
- int type;
- unsigned int segno, next_inuse;
+ unsigned int segno, next_inuse, start, end;
+ struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
+ int gc_mode, gc_type;
int err = 0;
+ int type;
+
+ /* Force block allocation for GC */
+ MAIN_SECS(sbi) -= secs;
+ start = MAIN_SECS(sbi) * sbi->segs_per_sec;
+ end = MAIN_SEGS(sbi) - 1;
+
+ mutex_lock(&DIRTY_I(sbi)->seglist_lock);
+ for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
+ if (SIT_I(sbi)->last_victim[gc_mode] >= start)
+ SIT_I(sbi)->last_victim[gc_mode] = 0;
+
+ for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
+ if (sbi->next_victim_seg[gc_type] >= start)
+ sbi->next_victim_seg[gc_type] = NULL_SEGNO;
+ mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
/* Move out cursegs from the target range */
for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
@@ -1423,18 +1441,24 @@ static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
.iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
};
- down_write(&sbi->gc_lock);
do_garbage_collect(sbi, segno, &gc_list, FG_GC);
- up_write(&sbi->gc_lock);
put_gc_inode(&gc_list);
- if (get_valid_blocks(sbi, segno, true))
- return -EAGAIN;
+ if (!gc_only && get_valid_blocks(sbi, segno, true)) {
+ err = -EAGAIN;
+ goto out;
+ }
+ if (fatal_signal_pending(current)) {
+ err = -ERESTARTSYS;
+ goto out;
+ }
}
+ if (gc_only)
+ goto out;
- err = f2fs_sync_fs(sbi->sb, 1);
+ err = f2fs_write_checkpoint(sbi, &cpc);
if (err)
- return err;
+ goto out;
next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start);
if (next_inuse <= end) {
@@ -1442,6 +1466,8 @@ static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
next_inuse);
f2fs_bug_on(sbi, 1);
}
+out:
+ MAIN_SECS(sbi) += secs;
return err;
}
@@ -1487,6 +1513,7 @@ static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs;
MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs;
+ MAIN_SECS(sbi) += secs;
FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs;
FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs;
F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count + blks);
@@ -1508,8 +1535,8 @@ static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
{
__u64 old_block_count, shrunk_blocks;
+ struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
unsigned int secs;
- int gc_mode, gc_type;
int err = 0;
__u32 rem;
@@ -1544,10 +1571,27 @@ int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
return -EINVAL;
}
- freeze_bdev(sbi->sb->s_bdev);
-
shrunk_blocks = old_block_count - block_count;
secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
+
+ /* stop other GC */
+ if (!down_write_trylock(&sbi->gc_lock))
+ return -EAGAIN;
+
+ /* stop CP to protect MAIN_SEC in free_segment_range */
+ f2fs_lock_op(sbi);
+ err = free_segment_range(sbi, secs, true);
+ f2fs_unlock_op(sbi);
+ up_write(&sbi->gc_lock);
+ if (err)
+ return err;
+
+ set_sbi_flag(sbi, SBI_IS_RESIZEFS);
+
+ freeze_super(sbi->sb);
+ down_write(&sbi->gc_lock);
+ mutex_lock(&sbi->cp_mutex);
+
spin_lock(&sbi->stat_lock);
if (shrunk_blocks + valid_user_blocks(sbi) +
sbi->current_reserved_blocks + sbi->unusable_block_count +
@@ -1556,69 +1600,44 @@ int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
else
sbi->user_block_count -= shrunk_blocks;
spin_unlock(&sbi->stat_lock);
- if (err) {
- thaw_bdev(sbi->sb->s_bdev, sbi->sb);
- return err;
- }
-
- mutex_lock(&sbi->resize_mutex);
- set_sbi_flag(sbi, SBI_IS_RESIZEFS);
-
- mutex_lock(&DIRTY_I(sbi)->seglist_lock);
-
- MAIN_SECS(sbi) -= secs;
-
- for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
- if (SIT_I(sbi)->last_victim[gc_mode] >=
- MAIN_SECS(sbi) * sbi->segs_per_sec)
- SIT_I(sbi)->last_victim[gc_mode] = 0;
-
- for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
- if (sbi->next_victim_seg[gc_type] >=
- MAIN_SECS(sbi) * sbi->segs_per_sec)
- sbi->next_victim_seg[gc_type] = NULL_SEGNO;
-
- mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
+ if (err)
+ goto out_err;
- err = free_segment_range(sbi, MAIN_SECS(sbi) * sbi->segs_per_sec,
- MAIN_SEGS(sbi) - 1);
+ err = free_segment_range(sbi, secs, false);
if (err)
- goto out;
+ goto recover_out;
update_sb_metadata(sbi, -secs);
err = f2fs_commit_super(sbi, false);
if (err) {
update_sb_metadata(sbi, secs);
- goto out;
+ goto recover_out;
}
- mutex_lock(&sbi->cp_mutex);
update_fs_metadata(sbi, -secs);
clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
set_sbi_flag(sbi, SBI_IS_DIRTY);
- mutex_unlock(&sbi->cp_mutex);
- err = f2fs_sync_fs(sbi->sb, 1);
+ err = f2fs_write_checkpoint(sbi, &cpc);
if (err) {
- mutex_lock(&sbi->cp_mutex);
update_fs_metadata(sbi, secs);
- mutex_unlock(&sbi->cp_mutex);
update_sb_metadata(sbi, secs);
f2fs_commit_super(sbi, false);
}
-out:
+recover_out:
if (err) {
set_sbi_flag(sbi, SBI_NEED_FSCK);
f2fs_err(sbi, "resize_fs failed, should run fsck to repair!");
- MAIN_SECS(sbi) += secs;
spin_lock(&sbi->stat_lock);
sbi->user_block_count += shrunk_blocks;
spin_unlock(&sbi->stat_lock);
}
+out_err:
+ mutex_unlock(&sbi->cp_mutex);
+ up_write(&sbi->gc_lock);
+ thaw_super(sbi->sb);
clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
- mutex_unlock(&sbi->resize_mutex);
- thaw_bdev(sbi->sb->s_bdev, sbi->sb);
return err;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 11:27:42 +0000