f2fs: fix to allow migrating fully valid segment

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 803e74be04b3 ("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: 803e74be04b3 ("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>

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e2d302a..cccdfb1 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -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);

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d26ff2a..1863944 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -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)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 39330ad..b3af763 100644 (file)
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -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)) {

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 993004f..b8c20d2 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -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);
        }
 }
 

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7069793..a17a4dd 100644 (file)
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -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;