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-rw-r--r--fs/f2fs/checkpoint.c3
-rw-r--r--fs/f2fs/debug.c7
-rw-r--r--fs/f2fs/f2fs.h6
-rw-r--r--fs/f2fs/file.c24
-rw-r--r--fs/f2fs/gc.c182
-rw-r--r--fs/f2fs/segment.c39
-rw-r--r--fs/f2fs/super.c4
7 files changed, 260 insertions, 5 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 89825261d474..7b4a0fd59512 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1302,7 +1302,8 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
else
__clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
- if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+ if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
+ is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
__set_ckpt_flags(ckpt, CP_FSCK_FLAG);
if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 99e9a5c37b71..7706049d23bf 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -27,8 +27,15 @@ static DEFINE_MUTEX(f2fs_stat_mutex);
static void update_general_status(struct f2fs_sb_info *sbi)
{
struct f2fs_stat_info *si = F2FS_STAT(sbi);
+ struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
int i;
+ /* these will be changed if online resize is done */
+ si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
+ si->main_area_sections = le32_to_cpu(raw_super->section_count);
+ si->main_area_zones = si->main_area_sections /
+ le32_to_cpu(raw_super->secs_per_zone);
+
/* validation check of the segment numbers */
si->hit_largest = atomic64_read(&sbi->read_hit_largest);
si->hit_cached = atomic64_read(&sbi->read_hit_cached);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9777e306390c..5c983268a303 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -415,6 +415,7 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
#define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13, __u32)
#define F2FS_IOC_GET_PIN_FILE _IOR(F2FS_IOCTL_MAGIC, 14, __u32)
#define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 15)
+#define F2FS_IOC_RESIZE_FS _IOW(F2FS_IOCTL_MAGIC, 16, __u64)
#define F2FS_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY
#define F2FS_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY
@@ -1116,6 +1117,7 @@ enum {
SBI_QUOTA_NEED_FLUSH, /* need to flush quota info in CP */
SBI_QUOTA_SKIP_FLUSH, /* skip flushing quota in current CP */
SBI_QUOTA_NEED_REPAIR, /* quota file may be corrupted */
+ SBI_IS_RESIZEFS, /* resizefs is in process */
};
enum {
@@ -1236,6 +1238,7 @@ struct f2fs_sb_info {
unsigned int segs_per_sec; /* segments per section */
unsigned int secs_per_zone; /* sections per zone */
unsigned int total_sections; /* total section count */
+ struct mutex resize_mutex; /* for resize exclusion */
unsigned int total_node_count; /* total node block count */
unsigned int total_valid_node_count; /* valid node block count */
loff_t max_file_blocks; /* max block index of file */
@@ -3058,6 +3061,8 @@ block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi);
int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable);
void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi);
int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
+void allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
+ unsigned int start, unsigned int end);
void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi);
int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
@@ -3196,6 +3201,7 @@ 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,
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);
/*
* recovery.c
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index efdafa886510..74600c4205da 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3059,6 +3059,27 @@ static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
return f2fs_precache_extents(file_inode(filp));
}
+static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
+ __u64 block_count;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (f2fs_readonly(sbi->sb))
+ return -EROFS;
+
+ if (copy_from_user(&block_count, (void __user *)arg,
+ sizeof(block_count)))
+ return -EFAULT;
+
+ ret = f2fs_resize_fs(sbi, block_count);
+
+ return ret;
+}
+
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -3115,6 +3136,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_ioc_set_pin_file(filp, arg);
case F2FS_IOC_PRECACHE_EXTENTS:
return f2fs_ioc_precache_extents(filp, arg);
+ case F2FS_IOC_RESIZE_FS:
+ return f2fs_ioc_resize_fs(filp, arg);
default:
return -ENOTTY;
}
@@ -3228,6 +3251,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case F2FS_IOC_GET_PIN_FILE:
case F2FS_IOC_SET_PIN_FILE:
case F2FS_IOC_PRECACHE_EXTENTS:
+ case F2FS_IOC_RESIZE_FS:
break;
default:
return -ENOIOCTLCMD;
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 1e029da26053..e19b49b02d1b 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);
@@ -405,7 +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;
}
}
@@ -1361,3 +1363,179 @@ 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_msg(sbi->sb, KERN_ERR,
+ "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_msg(sbi->sb, KERN_ERR,
+ "Should run fsck to repair first.");
+ return -EINVAL;
+ }
+
+ if (test_opt(sbi, DISABLE_CHECKPOINT)) {
+ f2fs_msg(sbi->sb, KERN_ERR,
+ "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_msg(sbi->sb, KERN_ERR,
+ "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;
+}
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 54a3e398d1ea..198b2e68a487 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2657,6 +2657,40 @@ static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
stat_inc_seg_type(sbi, curseg);
}
+void allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
+ unsigned int start, unsigned int end)
+{
+ struct curseg_info *curseg = CURSEG_I(sbi, type);
+ unsigned int segno;
+
+ down_read(&SM_I(sbi)->curseg_lock);
+ mutex_lock(&curseg->curseg_mutex);
+ down_write(&SIT_I(sbi)->sentry_lock);
+
+ segno = CURSEG_I(sbi, type)->segno;
+ if (segno < start || segno > end)
+ goto unlock;
+
+ if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type))
+ change_curseg(sbi, type);
+ else
+ new_curseg(sbi, type, true);
+
+ stat_inc_seg_type(sbi, curseg);
+
+ locate_dirty_segment(sbi, segno);
+unlock:
+ up_write(&SIT_I(sbi)->sentry_lock);
+
+ if (segno != curseg->segno)
+ f2fs_msg(sbi->sb, KERN_NOTICE,
+ "For resize: curseg of type %d: %u ==> %u",
+ type, segno, curseg->segno);
+
+ mutex_unlock(&curseg->curseg_mutex);
+ up_read(&SM_I(sbi)->curseg_lock);
+}
+
void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
{
struct curseg_info *curseg;
@@ -3786,7 +3820,7 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
struct f2fs_journal *journal = curseg->journal;
struct sit_entry_set *ses, *tmp;
struct list_head *head = &SM_I(sbi)->sit_entry_set;
- bool to_journal = true;
+ bool to_journal = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS);
struct seg_entry *se;
down_write(&sit_i->sentry_lock);
@@ -3805,7 +3839,8 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
* entries, remove all entries from journal and add and account
* them in sit entry set.
*/
- if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
+ if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) ||
+ !to_journal)
remove_sits_in_journal(sbi);
/*
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 15d7e30bfc72..049a5957532e 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3218,6 +3218,7 @@ try_onemore:
mutex_init(&sbi->gc_mutex);
mutex_init(&sbi->writepages);
mutex_init(&sbi->cp_mutex);
+ mutex_init(&sbi->resize_mutex);
init_rwsem(&sbi->node_write);
init_rwsem(&sbi->node_change);
@@ -3290,6 +3291,9 @@ try_onemore:
sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
}
+ if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+
/* Initialize device list */
err = f2fs_scan_devices(sbi);
if (err) {
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.