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path: root/fs/f2fs/gc.c
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Diffstat (limited to 'fs/f2fs/gc.c')
-rw-r--r--fs/f2fs/gc.c196
1 files changed, 185 insertions, 11 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 963fb4571fd9..6691f526fa40 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -311,10 +311,11 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
struct sit_info *sm = SIT_I(sbi);
struct victim_sel_policy p;
unsigned int secno, last_victim;
- unsigned int last_segment = MAIN_SEGS(sbi);
+ unsigned int last_segment;
unsigned int nsearched = 0;
mutex_lock(&dirty_i->seglist_lock);
+ last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec;
p.alloc_mode = alloc_mode;
select_policy(sbi, gc_type, type, &p);
@@ -387,7 +388,8 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
goto next;
/* Don't touch checkpointed data */
if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
- get_ckpt_valid_blocks(sbi, segno)))
+ get_ckpt_valid_blocks(sbi, segno) &&
+ p.alloc_mode != SSR))
goto next;
if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap))
goto next;
@@ -404,7 +406,8 @@ next:
sm->last_victim[p.gc_mode] = last_victim + 1;
else
sm->last_victim[p.gc_mode] = segno + 1;
- sm->last_victim[p.gc_mode] %= MAIN_SEGS(sbi);
+ sm->last_victim[p.gc_mode] %=
+ (MAIN_SECS(sbi) * sbi->segs_per_sec);
break;
}
}
@@ -615,9 +618,8 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
}
if (sum->version != dni->version) {
- f2fs_msg(sbi->sb, KERN_WARNING,
- "%s: valid data with mismatched node version.",
- __func__);
+ f2fs_warn(sbi, "%s: valid data with mismatched node version.",
+ __func__);
set_sbi_flag(sbi, SBI_NEED_FSCK);
}
@@ -658,7 +660,7 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
dn.data_blkaddr = ei.blk + index - ei.fofs;
if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
DATA_GENERIC_ENHANCE_READ))) {
- err = -EFAULT;
+ err = -EFSCORRUPTED;
goto put_page;
}
goto got_it;
@@ -676,7 +678,7 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
}
if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
DATA_GENERIC_ENHANCE))) {
- err = -EFAULT;
+ err = -EFSCORRUPTED;
goto put_page;
}
got_it:
@@ -1180,9 +1182,8 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
sum = page_address(sum_page);
if (type != GET_SUM_TYPE((&sum->footer))) {
- f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent segment (%u) "
- "type [%d, %d] in SSA and SIT",
- segno, type, GET_SUM_TYPE((&sum->footer)));
+ f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT",
+ segno, type, GET_SUM_TYPE((&sum->footer)));
set_sbi_flag(sbi, SBI_NEED_FSCK);
f2fs_stop_checkpoint(sbi, false);
goto skip;
@@ -1360,3 +1361,176 @@ void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
SIT_I(sbi)->last_victim[ALLOC_NEXT] =
GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
}
+
+static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
+ unsigned int end)
+{
+ int type;
+ unsigned int segno, next_inuse;
+ int err = 0;
+
+ /* Move out cursegs from the target range */
+ for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
+ allocate_segment_for_resize(sbi, type, start, end);
+
+ /* do GC to move out valid blocks in the range */
+ for (segno = start; segno <= end; segno += sbi->segs_per_sec) {
+ struct gc_inode_list gc_list = {
+ .ilist = LIST_HEAD_INIT(gc_list.ilist),
+ .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
+ };
+
+ mutex_lock(&sbi->gc_mutex);
+ do_garbage_collect(sbi, segno, &gc_list, FG_GC);
+ mutex_unlock(&sbi->gc_mutex);
+ put_gc_inode(&gc_list);
+
+ if (get_valid_blocks(sbi, segno, true))
+ return -EAGAIN;
+ }
+
+ err = f2fs_sync_fs(sbi->sb, 1);
+ if (err)
+ return err;
+
+ next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start);
+ if (next_inuse <= end) {
+ f2fs_err(sbi, "segno %u should be free but still inuse!",
+ next_inuse);
+ f2fs_bug_on(sbi, 1);
+ }
+ return err;
+}
+
+static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+ struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi);
+ int section_count = le32_to_cpu(raw_sb->section_count);
+ int segment_count = le32_to_cpu(raw_sb->segment_count);
+ int segment_count_main = le32_to_cpu(raw_sb->segment_count_main);
+ long long block_count = le64_to_cpu(raw_sb->block_count);
+ int segs = secs * sbi->segs_per_sec;
+
+ raw_sb->section_count = cpu_to_le32(section_count + secs);
+ raw_sb->segment_count = cpu_to_le32(segment_count + segs);
+ raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs);
+ raw_sb->block_count = cpu_to_le64(block_count +
+ (long long)segs * sbi->blocks_per_seg);
+}
+
+static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+ int segs = secs * sbi->segs_per_sec;
+ long long user_block_count =
+ le64_to_cpu(F2FS_CKPT(sbi)->user_block_count);
+
+ SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs;
+ MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs;
+ 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 +
+ (long long)segs * sbi->blocks_per_seg);
+}
+
+int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
+{
+ __u64 old_block_count, shrunk_blocks;
+ unsigned int secs;
+ int gc_mode, gc_type;
+ int err = 0;
+ __u32 rem;
+
+ old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count);
+ if (block_count > old_block_count)
+ return -EINVAL;
+
+ /* new fs size should align to section size */
+ div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem);
+ if (rem)
+ return -EINVAL;
+
+ if (block_count == old_block_count)
+ return 0;
+
+ if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
+ f2fs_err(sbi, "Should run fsck to repair first.");
+ return -EFSCORRUPTED;
+ }
+
+ if (test_opt(sbi, DISABLE_CHECKPOINT)) {
+ f2fs_err(sbi, "Checkpoint should be enabled.");
+ return -EINVAL;
+ }
+
+ freeze_bdev(sbi->sb->s_bdev);
+
+ shrunk_blocks = old_block_count - block_count;
+ secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
+ spin_lock(&sbi->stat_lock);
+ if (shrunk_blocks + valid_user_blocks(sbi) +
+ sbi->current_reserved_blocks + sbi->unusable_block_count +
+ F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count)
+ err = -ENOSPC;
+ 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);
+
+ err = free_segment_range(sbi, MAIN_SECS(sbi) * sbi->segs_per_sec,
+ MAIN_SEGS(sbi) - 1);
+ if (err)
+ goto out;
+
+ update_sb_metadata(sbi, -secs);
+
+ err = f2fs_commit_super(sbi, false);
+ if (err) {
+ update_sb_metadata(sbi, secs);
+ goto out;
+ }
+
+ update_fs_metadata(sbi, -secs);
+ clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+ err = f2fs_sync_fs(sbi->sb, 1);
+ if (err) {
+ update_fs_metadata(sbi, secs);
+ update_sb_metadata(sbi, secs);
+ f2fs_commit_super(sbi, false);
+ }
+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);
+ }
+ clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+ mutex_unlock(&sbi->resize_mutex);
+ thaw_bdev(sbi->sb->s_bdev, sbi->sb);
+ return err;
+}