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OpenCloudOS-Kernel
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f2fs: add f2fs_gc exception handle in f2fs_ioc_gc_range 

When f2fs_ioc_gc_range performs multiple segments gc ops, the return
value of f2fs_ioc_gc_range is determined by the last segment gc ops.
If its ops failed, the f2fs_ioc_gc_range will be considered to be failed
despite some of previous segments gc ops succeeded. Therefore, so we
fix: Redefine the return value of getting victim ops and add exception
handle for f2fs_gc. In particular, 1).if target has no valid block, it
will go on. 2).if target sectoion has valid block(s), but it is current
section, we will reminder the caller.

Signed-off-by: Qilong Zhang <zhangqilong3@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Qilong Zhang 2020-06-28 19:23:03 +08:00 committed by Jaegeuk Kim
parent f608c38c59
commit 9776750078
3 changed files with 21 additions and 8 deletions
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5
fs/f2fs/file.c
View File

@ -2525,6 +2525,11 @@ do_more:
}
ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));
if (ret) {
if (ret == -EBUSY)
ret = -EAGAIN;
goto out;
}
range.start += BLKS_PER_SEC(sbi);
if (range.start <= end)
goto do_more;

20
fs/f2fs/gc.c
View File

@ -330,6 +330,7 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
unsigned int secno, last_victim;
unsigned int last_segment;
unsigned int nsearched = 0;
int ret = 0;
mutex_lock(&dirty_i->seglist_lock);
last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec;
@ -341,12 +342,19 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
p.min_cost = get_max_cost(sbi, &p);
if (*result != NULL_SEGNO) {
if (get_valid_blocks(sbi, *result, false) &&
!sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result)))
if (!get_valid_blocks(sbi, *result, false)) {
ret = -ENODATA;
goto out;
}
if (sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result)))
ret = -EBUSY;
else
p.min_segno = *result;
goto out;
}
ret = -ENODATA;
if (p.max_search == 0)
goto out;
@ -447,6 +455,7 @@ got_result:
else
set_bit(secno, dirty_i->victim_secmap);
}
ret = 0;
}
out:
@ -456,7 +465,7 @@ out:
prefree_segments(sbi), free_segments(sbi));
mutex_unlock(&dirty_i->seglist_lock);
return (p.min_segno == NULL_SEGNO) ? 0 : 1;
return ret;
}
static const struct victim_selection default_v_ops = {
@ -1340,10 +1349,9 @@ gc_more:
ret = -EINVAL;
goto stop;
}
if (!__get_victim(sbi, &segno, gc_type)) {
ret = -ENODATA;
ret = __get_victim(sbi, &segno, gc_type);
if (ret)
goto stop;
}
seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type);
if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec)

4
fs/f2fs/segment.c
View File

@ -2631,7 +2631,7 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
bool reversed = false;
/* f2fs_need_SSR() already forces to do this */
if (v_ops->get_victim(sbi, &segno, BG_GC, type, SSR)) {
if (!v_ops->get_victim(sbi, &segno, BG_GC, type, SSR)) {
curseg->next_segno = segno;
return 1;
}
@ -2658,7 +2658,7 @@ static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
for (; cnt-- > 0; reversed ? i-- : i++) {
if (i == type)
continue;
if (v_ops->get_victim(sbi, &segno, BG_GC, i, SSR)) {
if (!v_ops->get_victim(sbi, &segno, BG_GC, i, SSR)) {
curseg->next_segno = segno;
return 1;
}