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f2fs: fix to allow migrating fully valid segment

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F2FS_IOC_FLUSH_DEVICE/F2FS_IOC_RESIZE_FS needs to migrate all blocks of
target segment to other place, no matter the segment has partially or fully
valid blocks.

However, after commit 803e74be04 ("f2fs: stop GC when the victim becomes
fully valid"), we may skip migration due to target segment is fully valid,
result in failing the ioctl interface, fix this.

Fixes: 803e74be04 ("f2fs: stop GC when the victim becomes fully valid")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2021-02-20 17:35:40 +08:00 committed by Jaegeuk Kim
parent c67c8c0f47
commit 7dede88659
5 changed files with 20 additions and 16 deletions
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2
fs/f2fs/f2fs.h
View File

@ -3547,7 +3547,7 @@ void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi);
int f2fs_start_gc_thread(struct f2fs_sb_info *sbi);
void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi);
block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode);
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background,
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background, bool force,
unsigned int segno);
void f2fs_build_gc_manager(struct f2fs_sb_info *sbi);
int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count);

9
fs/f2fs/file.c
View File

@ -1658,7 +1658,7 @@ next_alloc:
if (has_not_enough_free_secs(sbi, 0,
GET_SEC_FROM_SEG(sbi, overprovision_segments(sbi)))) {
down_write(&sbi->gc_lock);
err = f2fs_gc(sbi, true, false, NULL_SEGNO);
err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
if (err && err != -ENODATA && err != -EAGAIN)
goto out_err;
}
@ -2489,7 +2489,7 @@ static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
down_write(&sbi->gc_lock);
}
ret = f2fs_gc(sbi, sync, true, NULL_SEGNO);
ret = f2fs_gc(sbi, sync, true, false, NULL_SEGNO);
out:
mnt_drop_write_file(filp);
return ret;
@ -2525,7 +2525,8 @@ do_more:
down_write(&sbi->gc_lock);
}
ret = f2fs_gc(sbi, range->sync, true, GET_SEGNO(sbi, range->start));
ret = f2fs_gc(sbi, range->sync, true, false,
GET_SEGNO(sbi, range->start));
if (ret) {
if (ret == -EBUSY)
ret = -EAGAIN;
@ -2978,7 +2979,7 @@ static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
sm->last_victim[GC_CB] = end_segno + 1;
sm->last_victim[GC_GREEDY] = end_segno + 1;
sm->last_victim[ALLOC_NEXT] = end_segno + 1;
ret = f2fs_gc(sbi, true, true, start_segno);
ret = f2fs_gc(sbi, true, true, true, start_segno);
if (ret == -EAGAIN)
ret = 0;
else if (ret < 0)

21
fs/f2fs/gc.c
View File

@ -112,7 +112,7 @@ do_gc:
sync_mode = F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC;
/* if return value is not zero, no victim was selected */
if (f2fs_gc(sbi, sync_mode, true, NULL_SEGNO))
if (f2fs_gc(sbi, sync_mode, true, false, NULL_SEGNO))
wait_ms = gc_th->no_gc_sleep_time;
trace_f2fs_background_gc(sbi->sb, wait_ms,
@ -1354,7 +1354,8 @@ out:
* the victim data block is ignored.
*/
static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
struct gc_inode_list *gc_list, unsigned int segno, int gc_type)
struct gc_inode_list *gc_list, unsigned int segno, int gc_type,
bool force_migrate)
{
struct super_block *sb = sbi->sb;
struct f2fs_summary *entry;
@ -1383,8 +1384,8 @@ next_step:
* race condition along with SSR block allocation.
*/
if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) ||
get_valid_blocks(sbi, segno, true) ==
BLKS_PER_SEC(sbi))
(!force_migrate && get_valid_blocks(sbi, segno, true) ==
BLKS_PER_SEC(sbi)))
return submitted;
if (check_valid_map(sbi, segno, off) == 0)
@ -1519,7 +1520,8 @@ static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim,
static int do_garbage_collect(struct f2fs_sb_info *sbi,
unsigned int start_segno,
struct gc_inode_list *gc_list, int gc_type)
struct gc_inode_list *gc_list, int gc_type,
bool force_migrate)
{
struct page *sum_page;
struct f2fs_summary_block *sum;
@ -1606,7 +1608,8 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
gc_type);
else
submitted += gc_data_segment(sbi, sum->entries, gc_list,
segno, gc_type);
segno, gc_type,
force_migrate);
stat_inc_seg_count(sbi, type, gc_type);
migrated++;
@ -1634,7 +1637,7 @@ skip:
}
int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
bool background, unsigned int segno)
bool background, bool force, unsigned int segno)
{
int gc_type = sync ? FG_GC : BG_GC;
int sec_freed = 0, seg_freed = 0, total_freed = 0;
@ -1696,7 +1699,7 @@ gc_more:
if (ret)
goto stop;
seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type);
seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type, force);
if (gc_type == FG_GC &&
seg_freed == f2fs_usable_segs_in_sec(sbi, segno))
sec_freed++;
@ -1835,7 +1838,7 @@ static int free_segment_range(struct f2fs_sb_info *sbi,
.iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
};
do_garbage_collect(sbi, segno, &gc_list, FG_GC);
do_garbage_collect(sbi, segno, &gc_list, FG_GC, true);
put_gc_inode(&gc_list);
if (!gc_only && get_valid_blocks(sbi, segno, true)) {

2
fs/f2fs/segment.c
View File

@ -504,7 +504,7 @@ void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
*/
if (has_not_enough_free_secs(sbi, 0, 0)) {
down_write(&sbi->gc_lock);
f2fs_gc(sbi, false, false, NULL_SEGNO);
f2fs_gc(sbi, false, false, false, NULL_SEGNO);
}
}

2
fs/f2fs/super.c
View File

@ -1865,7 +1865,7 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
while (!f2fs_time_over(sbi, DISABLE_TIME)) {
down_write(&sbi->gc_lock);
err = f2fs_gc(sbi, true, false, NULL_SEGNO);
err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
if (err == -ENODATA) {
err = 0;
break;