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-rw-r--r--fs/f2fs/gc.c1817
1 files changed, 1427 insertions, 390 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 195cf0f9d9ef..384fa7e2085b 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -7,40 +7,64 @@
*/
#include <linux/fs.h>
#include <linux/module.h>
-#include <linux/backing-dev.h>
#include <linux/init.h>
#include <linux/f2fs_fs.h>
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/freezer.h>
+#include <linux/sched/signal.h>
+#include <linux/random.h>
+#include <linux/sched/mm.h>
#include "f2fs.h"
#include "node.h"
#include "segment.h"
#include "gc.h"
+#include "iostat.h"
#include <trace/events/f2fs.h>
+static struct kmem_cache *victim_entry_slab;
+
+static unsigned int count_bits(const unsigned long *addr,
+ unsigned int offset, unsigned int len);
+
static int gc_thread_func(void *data)
{
struct f2fs_sb_info *sbi = data;
struct f2fs_gc_kthread *gc_th = sbi->gc_thread;
wait_queue_head_t *wq = &sbi->gc_thread->gc_wait_queue_head;
+ wait_queue_head_t *fggc_wq = &sbi->gc_thread->fggc_wq;
unsigned int wait_ms;
+ struct f2fs_gc_control gc_control = {
+ .victim_segno = NULL_SEGNO,
+ .should_migrate_blocks = false,
+ .err_gc_skipped = false,
+ .one_time = false };
wait_ms = gc_th->min_sleep_time;
set_freezable();
do {
- wait_event_interruptible_timeout(*wq,
- kthread_should_stop() || freezing(current) ||
+ bool sync_mode, foreground = false, gc_boost = false;
+
+ wait_event_freezable_timeout(*wq,
+ kthread_should_stop() ||
+ waitqueue_active(fggc_wq) ||
gc_th->gc_wake,
msecs_to_jiffies(wait_ms));
+ if (test_opt(sbi, GC_MERGE) && waitqueue_active(fggc_wq)) {
+ foreground = true;
+ gc_control.one_time = false;
+ } else if (f2fs_sb_has_blkzoned(sbi)) {
+ gc_control.one_time = true;
+ }
+
/* give it a try one time */
if (gc_th->gc_wake)
- gc_th->gc_wake = 0;
+ gc_th->gc_wake = false;
- if (try_to_freeze()) {
+ if (f2fs_readonly(sbi->sb)) {
stat_other_skip_bggc_count(sbi);
continue;
}
@@ -53,10 +77,9 @@ static int gc_thread_func(void *data)
continue;
}
- if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
- f2fs_show_injection_info(FAULT_CHECKPOINT);
- f2fs_stop_checkpoint(sbi, false);
- }
+ if (time_to_inject(sbi, FAULT_CHECKPOINT))
+ f2fs_stop_checkpoint(sbi, false,
+ STOP_CP_REASON_FAULT_INJECT);
if (!sb_start_write_trylock(sbi->sb)) {
stat_other_skip_bggc_count(sbi);
@@ -76,41 +99,90 @@ static int gc_thread_func(void *data)
* invalidated soon after by user update or deletion.
* So, I'd like to wait some time to collect dirty segments.
*/
- if (sbi->gc_mode == GC_URGENT) {
+ if (sbi->gc_mode == GC_URGENT_HIGH ||
+ sbi->gc_mode == GC_URGENT_MID) {
wait_ms = gc_th->urgent_sleep_time;
- mutex_lock(&sbi->gc_mutex);
+ f2fs_down_write(&sbi->gc_lock);
goto do_gc;
}
- if (!mutex_trylock(&sbi->gc_mutex)) {
+ if (foreground) {
+ f2fs_down_write(&sbi->gc_lock);
+ goto do_gc;
+ } else if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
stat_other_skip_bggc_count(sbi);
goto next;
}
if (!is_idle(sbi, GC_TIME)) {
increase_sleep_time(gc_th, &wait_ms);
- mutex_unlock(&sbi->gc_mutex);
+ f2fs_up_write(&sbi->gc_lock);
stat_io_skip_bggc_count(sbi);
goto next;
}
- if (has_enough_invalid_blocks(sbi))
+ if (f2fs_sb_has_blkzoned(sbi)) {
+ if (has_enough_free_blocks(sbi,
+ gc_th->no_zoned_gc_percent)) {
+ wait_ms = gc_th->no_gc_sleep_time;
+ f2fs_up_write(&sbi->gc_lock);
+ goto next;
+ }
+ if (wait_ms == gc_th->no_gc_sleep_time)
+ wait_ms = gc_th->max_sleep_time;
+ }
+
+ if (need_to_boost_gc(sbi)) {
decrease_sleep_time(gc_th, &wait_ms);
- else
+ if (f2fs_sb_has_blkzoned(sbi))
+ gc_boost = true;
+ } else {
increase_sleep_time(gc_th, &wait_ms);
+ }
do_gc:
- stat_inc_bggc_count(sbi);
+ stat_inc_gc_call_count(sbi, foreground ?
+ FOREGROUND : BACKGROUND);
+
+ sync_mode = (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC) ||
+ (gc_boost && gc_th->boost_gc_greedy);
+
+ /* foreground GC was been triggered via f2fs_balance_fs() */
+ if (foreground && !f2fs_sb_has_blkzoned(sbi))
+ sync_mode = false;
+
+ gc_control.init_gc_type = sync_mode ? FG_GC : BG_GC;
+ gc_control.no_bg_gc = foreground;
+ gc_control.nr_free_secs = foreground ? 1 : 0;
/* if return value is not zero, no victim was selected */
- if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC), true, NULL_SEGNO))
- wait_ms = gc_th->no_gc_sleep_time;
+ if (f2fs_gc(sbi, &gc_control)) {
+ /* don't bother wait_ms by foreground gc */
+ if (!foreground)
+ wait_ms = gc_th->no_gc_sleep_time;
+ } else {
+ /* reset wait_ms to default sleep time */
+ if (wait_ms == gc_th->no_gc_sleep_time)
+ wait_ms = gc_th->min_sleep_time;
+ }
+
+ if (foreground)
+ wake_up_all(&gc_th->fggc_wq);
trace_f2fs_background_gc(sbi->sb, wait_ms,
prefree_segments(sbi), free_segments(sbi));
/* balancing f2fs's metadata periodically */
- f2fs_balance_fs_bg(sbi);
+ f2fs_balance_fs_bg(sbi, true);
next:
+ if (sbi->gc_mode != GC_NORMAL) {
+ spin_lock(&sbi->gc_remaining_trials_lock);
+ if (sbi->gc_remaining_trials) {
+ sbi->gc_remaining_trials--;
+ if (!sbi->gc_remaining_trials)
+ sbi->gc_mode = GC_NORMAL;
+ }
+ spin_unlock(&sbi->gc_remaining_trials_lock);
+ }
sb_end_write(sbi->sb);
} while (!kthread_should_stop());
@@ -121,57 +193,88 @@ int f2fs_start_gc_thread(struct f2fs_sb_info *sbi)
{
struct f2fs_gc_kthread *gc_th;
dev_t dev = sbi->sb->s_bdev->bd_dev;
- int err = 0;
gc_th = f2fs_kmalloc(sbi, sizeof(struct f2fs_gc_kthread), GFP_KERNEL);
- if (!gc_th) {
- err = -ENOMEM;
- goto out;
- }
+ if (!gc_th)
+ return -ENOMEM;
gc_th->urgent_sleep_time = DEF_GC_THREAD_URGENT_SLEEP_TIME;
- gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
- gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
- gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
+ gc_th->valid_thresh_ratio = DEF_GC_THREAD_VALID_THRESH_RATIO;
+ gc_th->boost_gc_multiple = BOOST_GC_MULTIPLE;
+ gc_th->boost_gc_greedy = GC_GREEDY;
+
+ if (f2fs_sb_has_blkzoned(sbi)) {
+ gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME_ZONED;
+ gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME_ZONED;
+ gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME_ZONED;
+ gc_th->no_zoned_gc_percent = LIMIT_NO_ZONED_GC;
+ gc_th->boost_zoned_gc_percent = LIMIT_BOOST_ZONED_GC;
+ } else {
+ gc_th->min_sleep_time = DEF_GC_THREAD_MIN_SLEEP_TIME;
+ gc_th->max_sleep_time = DEF_GC_THREAD_MAX_SLEEP_TIME;
+ gc_th->no_gc_sleep_time = DEF_GC_THREAD_NOGC_SLEEP_TIME;
+ gc_th->no_zoned_gc_percent = 0;
+ gc_th->boost_zoned_gc_percent = 0;
+ }
- gc_th->gc_wake= 0;
+ gc_th->gc_wake = false;
sbi->gc_thread = gc_th;
init_waitqueue_head(&sbi->gc_thread->gc_wait_queue_head);
+ init_waitqueue_head(&sbi->gc_thread->fggc_wq);
sbi->gc_thread->f2fs_gc_task = kthread_run(gc_thread_func, sbi,
"f2fs_gc-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(gc_th->f2fs_gc_task)) {
- err = PTR_ERR(gc_th->f2fs_gc_task);
- kvfree(gc_th);
+ int err = PTR_ERR(gc_th->f2fs_gc_task);
+
+ kfree(gc_th);
sbi->gc_thread = NULL;
+ return err;
}
-out:
- return err;
+
+ return 0;
}
void f2fs_stop_gc_thread(struct f2fs_sb_info *sbi)
{
struct f2fs_gc_kthread *gc_th = sbi->gc_thread;
+
if (!gc_th)
return;
kthread_stop(gc_th->f2fs_gc_task);
- kvfree(gc_th);
+ wake_up_all(&gc_th->fggc_wq);
+ kfree(gc_th);
sbi->gc_thread = NULL;
}
static int select_gc_type(struct f2fs_sb_info *sbi, int gc_type)
{
- int gc_mode = (gc_type == BG_GC) ? GC_CB : GC_GREEDY;
+ int gc_mode;
+
+ if (gc_type == BG_GC) {
+ if (sbi->am.atgc_enabled)
+ gc_mode = GC_AT;
+ else
+ gc_mode = GC_CB;
+ } else {
+ gc_mode = GC_GREEDY;
+ }
switch (sbi->gc_mode) {
case GC_IDLE_CB:
+ case GC_URGENT_LOW:
+ case GC_URGENT_MID:
gc_mode = GC_CB;
break;
case GC_IDLE_GREEDY:
- case GC_URGENT:
+ case GC_URGENT_HIGH:
gc_mode = GC_GREEDY;
break;
+ case GC_IDLE_AT:
+ gc_mode = GC_AT;
+ break;
}
+
return gc_mode;
}
@@ -180,27 +283,39 @@ static void select_policy(struct f2fs_sb_info *sbi, int gc_type,
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
- if (p->alloc_mode == SSR) {
+ if (p->alloc_mode == SSR || p->alloc_mode == AT_SSR) {
p->gc_mode = GC_GREEDY;
- p->dirty_segmap = dirty_i->dirty_segmap[type];
+ p->dirty_bitmap = dirty_i->dirty_segmap[type];
p->max_search = dirty_i->nr_dirty[type];
p->ofs_unit = 1;
} else {
p->gc_mode = select_gc_type(sbi, gc_type);
- p->dirty_segmap = dirty_i->dirty_segmap[DIRTY];
- p->max_search = dirty_i->nr_dirty[DIRTY];
- p->ofs_unit = sbi->segs_per_sec;
+ p->ofs_unit = SEGS_PER_SEC(sbi);
+ if (__is_large_section(sbi)) {
+ p->dirty_bitmap = dirty_i->dirty_secmap;
+ p->max_search = count_bits(p->dirty_bitmap,
+ 0, MAIN_SECS(sbi));
+ } else {
+ p->dirty_bitmap = dirty_i->dirty_segmap[DIRTY];
+ p->max_search = dirty_i->nr_dirty[DIRTY];
+ }
}
- /* we need to check every dirty segments in the FG_GC case */
+ /*
+ * adjust candidates range, should select all dirty segments for
+ * foreground GC and urgent GC cases.
+ */
if (gc_type != FG_GC &&
- (sbi->gc_mode != GC_URGENT) &&
+ (sbi->gc_mode != GC_URGENT_HIGH) &&
+ (p->gc_mode != GC_AT && p->alloc_mode != AT_SSR) &&
p->max_search > sbi->max_victim_search)
p->max_search = sbi->max_victim_search;
- /* let's select beginning hot/small space first in no_heap mode*/
- if (test_opt(sbi, NOHEAP) &&
- (type == CURSEG_HOT_DATA || IS_NODESEG(type)))
+ /* let's select beginning hot/small space first. */
+ if (f2fs_need_rand_seg(sbi))
+ p->offset = get_random_u32_below(MAIN_SECS(sbi) *
+ SEGS_PER_SEC(sbi));
+ else if (type == CURSEG_HOT_DATA || IS_NODESEG(type))
p->offset = 0;
else
p->offset = SIT_I(sbi)->last_victim[p->gc_mode];
@@ -211,11 +326,17 @@ static unsigned int get_max_cost(struct f2fs_sb_info *sbi,
{
/* SSR allocates in a segment unit */
if (p->alloc_mode == SSR)
- return sbi->blocks_per_seg;
+ return BLKS_PER_SEG(sbi);
+ else if (p->alloc_mode == AT_SSR)
+ return UINT_MAX;
+
+ /* LFS */
if (p->gc_mode == GC_GREEDY)
- return 2 * sbi->blocks_per_seg * p->ofs_unit;
+ return SEGS_TO_BLKS(sbi, 2 * p->ofs_unit);
else if (p->gc_mode == GC_CB)
return UINT_MAX;
+ else if (p->gc_mode == GC_AT)
+ return UINT_MAX;
else /* No other gc_mode */
return 0;
}
@@ -242,22 +363,18 @@ static unsigned int check_bg_victims(struct f2fs_sb_info *sbi)
static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
{
struct sit_info *sit_i = SIT_I(sbi);
- unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
- unsigned int start = GET_SEG_FROM_SEC(sbi, secno);
unsigned long long mtime = 0;
unsigned int vblocks;
unsigned char age = 0;
unsigned char u;
- unsigned int i;
+ unsigned int usable_segs_per_sec = f2fs_usable_segs_in_sec(sbi);
- for (i = 0; i < sbi->segs_per_sec; i++)
- mtime += get_seg_entry(sbi, start + i)->mtime;
+ mtime = f2fs_get_section_mtime(sbi, segno);
+ f2fs_bug_on(sbi, mtime == INVALID_MTIME);
vblocks = get_valid_blocks(sbi, segno, true);
+ vblocks = div_u64(vblocks, usable_segs_per_sec);
- mtime = div_u64(mtime, sbi->segs_per_sec);
- vblocks = div_u64(vblocks, sbi->segs_per_sec);
-
- u = (vblocks * 100) >> sbi->log_blocks_per_seg;
+ u = BLKS_TO_SEGS(sbi, vblocks * 100);
/* Handle if the system time has changed by the user */
if (mtime < sit_i->min_mtime)
@@ -272,16 +389,25 @@ static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
}
static inline unsigned int get_gc_cost(struct f2fs_sb_info *sbi,
- unsigned int segno, struct victim_sel_policy *p)
+ unsigned int segno, struct victim_sel_policy *p,
+ unsigned int valid_thresh_ratio)
{
if (p->alloc_mode == SSR)
return get_seg_entry(sbi, segno)->ckpt_valid_blocks;
+ if (p->one_time_gc && (valid_thresh_ratio < 100) &&
+ (get_valid_blocks(sbi, segno, true) >=
+ CAP_BLKS_PER_SEC(sbi) * valid_thresh_ratio / 100))
+ return UINT_MAX;
+
/* alloc_mode == LFS */
if (p->gc_mode == GC_GREEDY)
return get_valid_blocks(sbi, segno, true);
- else
+ else if (p->gc_mode == GC_CB)
return get_cb_cost(sbi, segno);
+
+ f2fs_bug_on(sbi, 1);
+ return 0;
}
static unsigned int count_bits(const unsigned long *addr,
@@ -296,6 +422,344 @@ static unsigned int count_bits(const unsigned long *addr,
return sum;
}
+static bool f2fs_check_victim_tree(struct f2fs_sb_info *sbi,
+ struct rb_root_cached *root)
+{
+#ifdef CONFIG_F2FS_CHECK_FS
+ struct rb_node *cur = rb_first_cached(root), *next;
+ struct victim_entry *cur_ve, *next_ve;
+
+ while (cur) {
+ next = rb_next(cur);
+ if (!next)
+ return true;
+
+ cur_ve = rb_entry(cur, struct victim_entry, rb_node);
+ next_ve = rb_entry(next, struct victim_entry, rb_node);
+
+ if (cur_ve->mtime > next_ve->mtime) {
+ f2fs_info(sbi, "broken victim_rbtree, "
+ "cur_mtime(%llu) next_mtime(%llu)",
+ cur_ve->mtime, next_ve->mtime);
+ return false;
+ }
+ cur = next;
+ }
+#endif
+ return true;
+}
+
+static struct victim_entry *__lookup_victim_entry(struct f2fs_sb_info *sbi,
+ unsigned long long mtime)
+{
+ struct atgc_management *am = &sbi->am;
+ struct rb_node *node = am->root.rb_root.rb_node;
+ struct victim_entry *ve = NULL;
+
+ while (node) {
+ ve = rb_entry(node, struct victim_entry, rb_node);
+
+ if (mtime < ve->mtime)
+ node = node->rb_left;
+ else
+ node = node->rb_right;
+ }
+ return ve;
+}
+
+static struct victim_entry *__create_victim_entry(struct f2fs_sb_info *sbi,
+ unsigned long long mtime, unsigned int segno)
+{
+ struct atgc_management *am = &sbi->am;
+ struct victim_entry *ve;
+
+ ve = f2fs_kmem_cache_alloc(victim_entry_slab, GFP_NOFS, true, NULL);
+
+ ve->mtime = mtime;
+ ve->segno = segno;
+
+ list_add_tail(&ve->list, &am->victim_list);
+ am->victim_count++;
+
+ return ve;
+}
+
+static void __insert_victim_entry(struct f2fs_sb_info *sbi,
+ unsigned long long mtime, unsigned int segno)
+{
+ struct atgc_management *am = &sbi->am;
+ struct rb_root_cached *root = &am->root;
+ struct rb_node **p = &root->rb_root.rb_node;
+ struct rb_node *parent = NULL;
+ struct victim_entry *ve;
+ bool left_most = true;
+
+ /* look up rb tree to find parent node */
+ while (*p) {
+ parent = *p;
+ ve = rb_entry(parent, struct victim_entry, rb_node);
+
+ if (mtime < ve->mtime) {
+ p = &(*p)->rb_left;
+ } else {
+ p = &(*p)->rb_right;
+ left_most = false;
+ }
+ }
+
+ ve = __create_victim_entry(sbi, mtime, segno);
+
+ rb_link_node(&ve->rb_node, parent, p);
+ rb_insert_color_cached(&ve->rb_node, root, left_most);
+}
+
+static void add_victim_entry(struct f2fs_sb_info *sbi,
+ struct victim_sel_policy *p, unsigned int segno)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ unsigned long long mtime = 0;
+
+ if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
+ if (p->gc_mode == GC_AT &&
+ get_valid_blocks(sbi, segno, true) == 0)
+ return;
+ }
+
+ mtime = f2fs_get_section_mtime(sbi, segno);
+ f2fs_bug_on(sbi, mtime == INVALID_MTIME);
+
+ /* Handle if the system time has changed by the user */
+ if (mtime < sit_i->min_mtime)
+ sit_i->min_mtime = mtime;
+ if (mtime > sit_i->max_mtime)
+ sit_i->max_mtime = mtime;
+ if (mtime < sit_i->dirty_min_mtime)
+ sit_i->dirty_min_mtime = mtime;
+ if (mtime > sit_i->dirty_max_mtime)
+ sit_i->dirty_max_mtime = mtime;
+
+ /* don't choose young section as candidate */
+ if (sit_i->dirty_max_mtime - mtime < p->age_threshold)
+ return;
+
+ __insert_victim_entry(sbi, mtime, segno);
+}
+
+static void atgc_lookup_victim(struct f2fs_sb_info *sbi,
+ struct victim_sel_policy *p)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct atgc_management *am = &sbi->am;
+ struct rb_root_cached *root = &am->root;
+ struct rb_node *node;
+ struct victim_entry *ve;
+ unsigned long long total_time;
+ unsigned long long age, u, accu;
+ unsigned long long max_mtime = sit_i->dirty_max_mtime;
+ unsigned long long min_mtime = sit_i->dirty_min_mtime;
+ unsigned int sec_blocks = CAP_BLKS_PER_SEC(sbi);
+ unsigned int vblocks;
+ unsigned int dirty_threshold = max(am->max_candidate_count,
+ am->candidate_ratio *
+ am->victim_count / 100);
+ unsigned int age_weight = am->age_weight;
+ unsigned int cost;
+ unsigned int iter = 0;
+
+ if (max_mtime < min_mtime)
+ return;
+
+ max_mtime += 1;
+ total_time = max_mtime - min_mtime;
+
+ accu = div64_u64(ULLONG_MAX, total_time);
+ accu = min_t(unsigned long long, div_u64(accu, 100),
+ DEFAULT_ACCURACY_CLASS);
+
+ node = rb_first_cached(root);
+next:
+ ve = rb_entry_safe(node, struct victim_entry, rb_node);
+ if (!ve)
+ return;
+
+ if (ve->mtime >= max_mtime || ve->mtime < min_mtime)
+ goto skip;
+
+ /* age = 10000 * x% * 60 */
+ age = div64_u64(accu * (max_mtime - ve->mtime), total_time) *
+ age_weight;
+
+ vblocks = get_valid_blocks(sbi, ve->segno, true);
+ f2fs_bug_on(sbi, !vblocks || vblocks == sec_blocks);
+
+ /* u = 10000 * x% * 40 */
+ u = div64_u64(accu * (sec_blocks - vblocks), sec_blocks) *
+ (100 - age_weight);
+
+ f2fs_bug_on(sbi, age + u >= UINT_MAX);
+
+ cost = UINT_MAX - (age + u);
+ iter++;
+
+ if (cost < p->min_cost ||
+ (cost == p->min_cost && age > p->oldest_age)) {
+ p->min_cost = cost;
+ p->oldest_age = age;
+ p->min_segno = ve->segno;
+ }
+skip:
+ if (iter < dirty_threshold) {
+ node = rb_next(node);
+ goto next;
+ }
+}
+
+/*
+ * select candidates around source section in range of
+ * [target - dirty_threshold, target + dirty_threshold]
+ */
+static void atssr_lookup_victim(struct f2fs_sb_info *sbi,
+ struct victim_sel_policy *p)
+{
+ struct sit_info *sit_i = SIT_I(sbi);
+ struct atgc_management *am = &sbi->am;
+ struct victim_entry *ve;
+ unsigned long long age;
+ unsigned long long max_mtime = sit_i->dirty_max_mtime;
+ unsigned long long min_mtime = sit_i->dirty_min_mtime;
+ unsigned int vblocks;
+ unsigned int dirty_threshold = max(am->max_candidate_count,
+ am->candidate_ratio *
+ am->victim_count / 100);
+ unsigned int cost, iter;
+ int stage = 0;
+
+ if (max_mtime < min_mtime)
+ return;
+ max_mtime += 1;
+next_stage:
+ iter = 0;
+ ve = __lookup_victim_entry(sbi, p->age);
+next_node:
+ if (!ve) {
+ if (stage++ == 0)
+ goto next_stage;
+ return;
+ }
+
+ if (ve->mtime >= max_mtime || ve->mtime < min_mtime)
+ goto skip_node;
+
+ age = max_mtime - ve->mtime;
+
+ vblocks = get_seg_entry(sbi, ve->segno)->ckpt_valid_blocks;
+ f2fs_bug_on(sbi, !vblocks);
+
+ /* rare case */
+ if (vblocks == BLKS_PER_SEG(sbi))
+ goto skip_node;
+
+ iter++;
+
+ age = max_mtime - abs(p->age - age);
+ cost = UINT_MAX - vblocks;
+
+ if (cost < p->min_cost ||
+ (cost == p->min_cost && age > p->oldest_age)) {
+ p->min_cost = cost;
+ p->oldest_age = age;
+ p->min_segno = ve->segno;
+ }
+skip_node:
+ if (iter < dirty_threshold) {
+ ve = rb_entry(stage == 0 ? rb_prev(&ve->rb_node) :
+ rb_next(&ve->rb_node),
+ struct victim_entry, rb_node);
+ goto next_node;
+ }
+
+ if (stage++ == 0)
+ goto next_stage;
+}
+
+static void lookup_victim_by_age(struct f2fs_sb_info *sbi,
+ struct victim_sel_policy *p)
+{
+ f2fs_bug_on(sbi, !f2fs_check_victim_tree(sbi, &sbi->am.root));
+
+ if (p->gc_mode == GC_AT)
+ atgc_lookup_victim(sbi, p);
+ else if (p->alloc_mode == AT_SSR)
+ atssr_lookup_victim(sbi, p);
+ else
+ f2fs_bug_on(sbi, 1);
+}
+
+static void release_victim_entry(struct f2fs_sb_info *sbi)
+{
+ struct atgc_management *am = &sbi->am;
+ struct victim_entry *ve, *tmp;
+
+ list_for_each_entry_safe(ve, tmp, &am->victim_list, list) {
+ list_del(&ve->list);
+ kmem_cache_free(victim_entry_slab, ve);
+ am->victim_count--;
+ }
+
+ am->root = RB_ROOT_CACHED;
+
+ f2fs_bug_on(sbi, am->victim_count);
+ f2fs_bug_on(sbi, !list_empty(&am->victim_list));
+}
+
+static bool f2fs_pin_section(struct f2fs_sb_info *sbi, unsigned int segno)
+{
+ struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
+ unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
+
+ if (!dirty_i->enable_pin_section)
+ return false;
+ if (!test_and_set_bit(secno, dirty_i->pinned_secmap))
+ dirty_i->pinned_secmap_cnt++;
+ return true;
+}
+
+static bool f2fs_pinned_section_exists(struct dirty_seglist_info *dirty_i)
+{
+ return dirty_i->pinned_secmap_cnt;
+}
+
+static bool f2fs_section_is_pinned(struct dirty_seglist_info *dirty_i,
+ unsigned int secno)
+{
+ return dirty_i->enable_pin_section &&
+ f2fs_pinned_section_exists(dirty_i) &&
+ test_bit(secno, dirty_i->pinned_secmap);
+}
+
+static void f2fs_unpin_all_sections(struct f2fs_sb_info *sbi, bool enable)
+{
+ unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
+
+ if (f2fs_pinned_section_exists(DIRTY_I(sbi))) {
+ memset(DIRTY_I(sbi)->pinned_secmap, 0, bitmap_size);
+ DIRTY_I(sbi)->pinned_secmap_cnt = 0;
+ }
+ DIRTY_I(sbi)->enable_pin_section = enable;
+}
+
+static int f2fs_gc_pinned_control(struct inode *inode, int gc_type,
+ unsigned int segno)
+{
+ if (!f2fs_is_pinned_file(inode))
+ return 0;
+ if (gc_type != FG_GC)
+ return -EBUSY;
+ if (!f2fs_pin_section(F2FS_I_SB(inode), segno))
+ f2fs_pin_file_control(inode, true);
+ return -EAGAIN;
+}
+
/*
* This function is called from two paths.
* One is garbage collection and the other is SSR segment selection.
@@ -304,31 +768,61 @@ static unsigned int count_bits(const unsigned long *addr,
* When it is called from SSR segment selection, it finds a segment
* which has minimum valid blocks and removes it from dirty seglist.
*/
-static int get_victim_by_default(struct f2fs_sb_info *sbi,
- unsigned int *result, int gc_type, int type, char alloc_mode)
+int f2fs_get_victim(struct f2fs_sb_info *sbi, unsigned int *result,
+ int gc_type, int type, char alloc_mode,
+ unsigned long long age, bool one_time)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
struct sit_info *sm = SIT_I(sbi);
- struct victim_sel_policy p;
+ struct victim_sel_policy p = {0};
unsigned int secno, last_victim;
- unsigned int last_segment = MAIN_SEGS(sbi);
- unsigned int nsearched = 0;
+ unsigned int last_segment;
+ unsigned int nsearched;
+ unsigned int valid_thresh_ratio = 100;
+ bool is_atgc;
+ int ret = 0;
mutex_lock(&dirty_i->seglist_lock);
+ last_segment = MAIN_SECS(sbi) * SEGS_PER_SEC(sbi);
p.alloc_mode = alloc_mode;
- select_policy(sbi, gc_type, type, &p);
+ p.age = age;
+ p.age_threshold = sbi->am.age_threshold;
+ if (one_time) {
+ p.one_time_gc = one_time;
+ if (has_enough_free_secs(sbi, 0, NR_PERSISTENT_LOG))
+ valid_thresh_ratio = sbi->gc_thread->valid_thresh_ratio;
+ }
+retry:
+ select_policy(sbi, gc_type, type, &p);
p.min_segno = NULL_SEGNO;
+ p.oldest_age = 0;
p.min_cost = get_max_cost(sbi, &p);
+ is_atgc = (p.gc_mode == GC_AT || p.alloc_mode == AT_SSR);
+ nsearched = 0;
+
+ if (is_atgc)
+ SIT_I(sbi)->dirty_min_mtime = ULLONG_MAX;
+
if (*result != NULL_SEGNO) {
- if (get_valid_blocks(sbi, *result, false) &&
- !sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result)))
- p.min_segno = *result;
- goto out;
+ if (!get_valid_blocks(sbi, *result, false)) {
+ ret = -ENODATA;
+ goto out;
+ }
+
+ if (sec_usage_check(sbi, GET_SEC_FROM_SEG(sbi, *result))) {
+ ret = -EBUSY;
+ goto out;
+ }
+ if (gc_type == FG_GC)
+ clear_bit(GET_SEC_FROM_SEG(sbi, *result), dirty_i->victim_secmap);
+ p.min_segno = *result;
+ goto got_result;
}
+ ret = -ENODATA;
if (p.max_search == 0)
goto out;
@@ -356,10 +850,14 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
}
while (1) {
- unsigned long cost;
- unsigned int segno;
-
- segno = find_next_bit(p.dirty_segmap, last_segment, p.offset);
+ unsigned long cost, *dirty_bitmap;
+ unsigned int unit_no, segno;
+
+ dirty_bitmap = p.dirty_bitmap;
+ unit_no = find_next_bit(dirty_bitmap,
+ last_segment / p.ofs_unit,
+ p.offset / p.ofs_unit);
+ segno = unit_no * p.ofs_unit;
if (segno >= last_segment) {
if (sm->last_victim[p.gc_mode]) {
last_segment =
@@ -372,27 +870,55 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
}
p.offset = segno + p.ofs_unit;
- if (p.ofs_unit > 1) {
- p.offset -= segno % p.ofs_unit;
- nsearched += count_bits(p.dirty_segmap,
- p.offset - p.ofs_unit,
- p.ofs_unit);
- } else {
- nsearched++;
- }
+ nsearched++;
+
+#ifdef CONFIG_F2FS_CHECK_FS
+ /*
+ * skip selecting the invalid segno (that is failed due to block
+ * validity check failure during GC) to avoid endless GC loop in
+ * such cases.
+ */
+ if (test_bit(segno, sm->invalid_segmap))
+ goto next;
+#endif
secno = GET_SEC_FROM_SEG(sbi, segno);
if (sec_usage_check(sbi, secno))
goto next;
+
/* Don't touch checkpointed data */
- if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
- get_ckpt_valid_blocks(sbi, segno)))
- goto next;
+ if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
+ if (p.alloc_mode == LFS) {
+ /*
+ * LFS is set to find source section during GC.
+ * The victim should have no checkpointed data.
+ */
+ if (get_ckpt_valid_blocks(sbi, segno, true))
+ goto next;
+ } else {
+ /*
+ * SSR | AT_SSR are set to find target segment
+ * for writes which can be full by checkpointed
+ * and newly written blocks.
+ */
+ if (!f2fs_segment_has_free_slot(sbi, segno))
+ goto next;
+ }
+ }
+
if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap))
goto next;
- cost = get_gc_cost(sbi, segno, &p);
+ if (gc_type == FG_GC && f2fs_section_is_pinned(dirty_i, secno))
+ goto next;
+
+ if (is_atgc) {
+ add_victim_entry(sbi, &p, segno);
+ goto next;
+ }
+
+ cost = get_gc_cost(sbi, segno, &p, valid_thresh_ratio);
if (p.min_cost > cost) {
p.min_segno = segno;
@@ -401,13 +927,28 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
next:
if (nsearched >= p.max_search) {
if (!sm->last_victim[p.gc_mode] && segno <= last_victim)
- sm->last_victim[p.gc_mode] = last_victim + 1;
+ sm->last_victim[p.gc_mode] =
+ last_victim + p.ofs_unit;
else
- sm->last_victim[p.gc_mode] = segno + 1;
- sm->last_victim[p.gc_mode] %= MAIN_SEGS(sbi);
+ sm->last_victim[p.gc_mode] = segno + p.ofs_unit;
+ sm->last_victim[p.gc_mode] %=
+ (MAIN_SECS(sbi) * SEGS_PER_SEC(sbi));
break;
}
}
+
+ /* get victim for GC_AT/AT_SSR */
+ if (is_atgc) {
+ lookup_victim_by_age(sbi, &p);
+ release_victim_entry(sbi);
+ }
+
+ if (is_atgc && p.min_segno == NULL_SEGNO &&
+ sm->elapsed_time < p.age_threshold) {
+ p.age_threshold = 0;
+ goto retry;
+ }
+
if (p.min_segno != NULL_SEGNO) {
got_it:
*result = (p.min_segno / p.ofs_unit) * p.ofs_unit;
@@ -419,6 +960,7 @@ got_result:
else
set_bit(secno, dirty_i->victim_secmap);
}
+ ret = 0;
}
out:
@@ -428,13 +970,9 @@ 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 = {
- .get_victim = get_victim_by_default,
-};
-
static struct inode *find_gc_inode(struct gc_inode_list *gc_list, nid_t ino)
{
struct inode_entry *ie;
@@ -453,7 +991,8 @@ static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode)
iput(inode);
return;
}
- new_ie = f2fs_kmem_cache_alloc(f2fs_inode_entry_slab, GFP_NOFS);
+ new_ie = f2fs_kmem_cache_alloc(f2fs_inode_entry_slab,
+ GFP_NOFS, true, NULL);
new_ie->inode = inode;
f2fs_radix_tree_insert(&gc_list->iroot, inode->i_ino, new_ie);
@@ -463,6 +1002,7 @@ static void add_gc_inode(struct gc_inode_list *gc_list, struct inode *inode)
static void put_gc_inode(struct gc_inode_list *gc_list)
{
struct inode_entry *ie, *next_ie;
+
list_for_each_entry_safe(ie, next_ie, &gc_list->ilist, list) {
radix_tree_delete(&gc_list->iroot, ie->inode->i_ino);
iput(ie->inode);
@@ -499,6 +1039,7 @@ static int gc_node_segment(struct f2fs_sb_info *sbi,
int phase = 0;
bool fggc = (gc_type == FG_GC);
int submitted = 0;
+ unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
start_addr = START_BLOCK(sbi, segno);
@@ -508,9 +1049,9 @@ next_step:
if (fggc && phase == 2)
atomic_inc(&sbi->wb_sync_req[NODE]);
- for (off = 0; off < sbi->blocks_per_seg; off++, entry++) {
+ for (off = 0; off < usable_blks_in_seg; off++, entry++) {
nid_t nid = le32_to_cpu(entry->nid);
- struct page *node_page;
+ struct folio *node_folio;
struct node_info ni;
int err;
@@ -533,27 +1074,27 @@ next_step:
}
/* phase == 2 */
- node_page = f2fs_get_node_page(sbi, nid);
- if (IS_ERR(node_page))
+ node_folio = f2fs_get_node_folio(sbi, nid, NODE_TYPE_REGULAR);
+ if (IS_ERR(node_folio))
continue;
- /* block may become invalid during f2fs_get_node_page */
+ /* block may become invalid during f2fs_get_node_folio */
if (check_valid_map(sbi, segno, off) == 0) {
- f2fs_put_page(node_page, 1);
+ f2fs_folio_put(node_folio, true);
continue;
}
- if (f2fs_get_node_info(sbi, nid, &ni)) {
- f2fs_put_page(node_page, 1);
+ if (f2fs_get_node_info(sbi, nid, &ni, false)) {
+ f2fs_folio_put(node_folio, true);
continue;
}
if (ni.blk_addr != start_addr + off) {
- f2fs_put_page(node_page, 1);
+ f2fs_folio_put(node_folio, true);
continue;
}
- err = f2fs_move_node_page(node_page, gc_type);
+ err = f2fs_move_node_folio(node_folio, gc_type);
if (!err && gc_type == FG_GC)
submitted++;
stat_inc_node_blk_count(sbi, 1, gc_type);
@@ -586,57 +1127,91 @@ block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode)
bidx = node_ofs - 1;
} else if (node_ofs <= indirect_blks) {
int dec = (node_ofs - 4) / (NIDS_PER_BLOCK + 1);
+
bidx = node_ofs - 2 - dec;
} else {
int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
+
bidx = node_ofs - 5 - dec;
}
- return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode);
+ return bidx * ADDRS_PER_BLOCK(inode) + ADDRS_PER_INODE(inode);
}
static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
struct node_info *dni, block_t blkaddr, unsigned int *nofs)
{
- struct page *node_page;
+ struct folio *node_folio;
nid_t nid;
- unsigned int ofs_in_node;
+ unsigned int ofs_in_node, max_addrs, base;
block_t source_blkaddr;
nid = le32_to_cpu(sum->nid);
ofs_in_node = le16_to_cpu(sum->ofs_in_node);
- node_page = f2fs_get_node_page(sbi, nid);
- if (IS_ERR(node_page))
+ node_folio = f2fs_get_node_folio(sbi, nid, NODE_TYPE_REGULAR);
+ if (IS_ERR(node_folio))
return false;
- if (f2fs_get_node_info(sbi, nid, dni)) {
- f2fs_put_page(node_page, 1);
+ if (f2fs_get_node_info(sbi, nid, dni, false)) {
+ f2fs_folio_put(node_folio, true);
return false;
}
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);
}
- *nofs = ofs_of_node(node_page);
- source_blkaddr = datablock_addr(NULL, node_page, ofs_in_node);
- f2fs_put_page(node_page, 1);
+ if (f2fs_check_nid_range(sbi, dni->ino)) {
+ f2fs_folio_put(node_folio, true);
+ return false;
+ }
+
+ if (IS_INODE(node_folio)) {
+ base = offset_in_addr(F2FS_INODE(node_folio));
+ max_addrs = DEF_ADDRS_PER_INODE;
+ } else {
+ base = 0;
+ max_addrs = DEF_ADDRS_PER_BLOCK;
+ }
+
+ if (base + ofs_in_node >= max_addrs) {
+ f2fs_err(sbi, "Inconsistent blkaddr offset: base:%u, ofs_in_node:%u, max:%u, ino:%u, nid:%u",
+ base, ofs_in_node, max_addrs, dni->ino, dni->nid);
+ f2fs_folio_put(node_folio, true);
+ return false;
+ }
+
+ *nofs = ofs_of_node(node_folio);
+ source_blkaddr = data_blkaddr(NULL, node_folio, ofs_in_node);
+ f2fs_folio_put(node_folio, true);
+
+ if (source_blkaddr != blkaddr) {
+#ifdef CONFIG_F2FS_CHECK_FS
+ unsigned int segno = GET_SEGNO(sbi, blkaddr);
+ unsigned long offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
- if (source_blkaddr != blkaddr)
+ if (unlikely(check_valid_map(sbi, segno, offset))) {
+ if (!test_and_set_bit(segno, SIT_I(sbi)->invalid_segmap)) {
+ f2fs_err(sbi, "mismatched blkaddr %u (source_blkaddr %u) in seg %u",
+ blkaddr, source_blkaddr, segno);
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ }
+ }
+#endif
return false;
+ }
return true;
}
static int ra_data_block(struct inode *inode, pgoff_t index)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- struct address_space *mapping = inode->i_mapping;
+ struct address_space *mapping = f2fs_is_cow_file(inode) ?
+ F2FS_I(inode)->atomic_inode->i_mapping : inode->i_mapping;
struct dnode_of_data dn;
- struct page *page;
- struct extent_info ei = {0, 0, 0};
+ struct folio *folio, *efolio;
struct f2fs_io_info fio = {
.sbi = sbi,
.ino = inode->i_ino,
@@ -645,62 +1220,75 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
.op = REQ_OP_READ,
.op_flags = 0,
.encrypted_page = NULL,
- .in_list = false,
- .retry = false,
+ .in_list = 0,
};
int err;
- page = f2fs_grab_cache_page(mapping, index, true);
- if (!page)
- return -ENOMEM;
+ folio = f2fs_grab_cache_folio(mapping, index, true);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
- if (f2fs_lookup_extent_cache(inode, index, &ei)) {
- dn.data_blkaddr = ei.blk + index - ei.fofs;
+ if (f2fs_lookup_read_extent_cache_block(inode, index,
+ &dn.data_blkaddr)) {
+ if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
+ DATA_GENERIC_ENHANCE_READ))) {
+ err = -EFSCORRUPTED;
+ goto put_folio;
+ }
goto got_it;
}
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
if (err)
- goto put_page;
+ goto put_folio;
f2fs_put_dnode(&dn);
+ if (!__is_valid_data_blkaddr(dn.data_blkaddr)) {
+ err = -ENOENT;
+ goto put_folio;
+ }
if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
- DATA_GENERIC))) {
- err = -EFAULT;
- goto put_page;
+ DATA_GENERIC_ENHANCE))) {
+ err = -EFSCORRUPTED;
+ goto put_folio;
}
got_it:
- /* read page */
- fio.page = page;
+ /* read folio */
+ fio.folio = folio;
fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr;
/*
* don't cache encrypted data into meta inode until previous dirty
* data were writebacked to avoid racing between GC and flush.
*/
- f2fs_wait_on_page_writeback(page, DATA, true, true);
+ f2fs_folio_wait_writeback(folio, DATA, true, true);
f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
- fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(sbi),
- dn.data_blkaddr,
+ efolio = f2fs_filemap_get_folio(META_MAPPING(sbi), dn.data_blkaddr,
FGP_LOCK | FGP_CREAT, GFP_NOFS);
- if (!fio.encrypted_page) {
- err = -ENOMEM;
- goto put_page;
+ if (IS_ERR(efolio)) {
+ err = PTR_ERR(efolio);
+ goto put_folio;
}
+ fio.encrypted_page = &efolio->page;
+
err = f2fs_submit_page_bio(&fio);
if (err)
goto put_encrypted_page;
- f2fs_put_page(fio.encrypted_page, 0);
- f2fs_put_page(page, 1);
+ f2fs_put_page(fio.encrypted_page, false);
+ f2fs_folio_put(folio, true);
+
+ f2fs_update_iostat(sbi, inode, FS_DATA_READ_IO, F2FS_BLKSIZE);
+ f2fs_update_iostat(sbi, NULL, FS_GDATA_READ_IO, F2FS_BLKSIZE);
+
return 0;
put_encrypted_page:
- f2fs_put_page(fio.encrypted_page, 1);
-put_page:
- f2fs_put_page(page, 1);
+ f2fs_put_page(fio.encrypted_page, true);
+put_folio:
+ f2fs_folio_put(folio, true);
return err;
}
@@ -711,6 +1299,8 @@ put_page:
static int move_data_block(struct inode *inode, block_t bidx,
int gc_type, unsigned int segno, int off)
{
+ struct address_space *mapping = f2fs_is_cow_file(inode) ?
+ F2FS_I(inode)->atomic_inode->i_mapping : inode->i_mapping;
struct f2fs_io_info fio = {
.sbi = F2FS_I_SB(inode),
.ino = inode->i_ino,
@@ -719,39 +1309,32 @@ static int move_data_block(struct inode *inode, block_t bidx,
.op = REQ_OP_READ,
.op_flags = 0,
.encrypted_page = NULL,
- .in_list = false,
- .retry = false,
+ .in_list = 0,
};
struct dnode_of_data dn;
struct f2fs_summary sum;
struct node_info ni;
- struct page *page, *mpage;
+ struct folio *folio, *mfolio, *efolio;
block_t newaddr;
int err = 0;
- bool lfs_mode = test_opt(fio.sbi, LFS);
+ bool lfs_mode = f2fs_lfs_mode(fio.sbi);
+ int type = fio.sbi->am.atgc_enabled && (gc_type == BG_GC) &&
+ (fio.sbi->gc_mode != GC_URGENT_HIGH) ?
+ CURSEG_ALL_DATA_ATGC : CURSEG_COLD_DATA;
/* do not read out */
- page = f2fs_grab_cache_page(inode->i_mapping, bidx, false);
- if (!page)
- return -ENOMEM;
+ folio = f2fs_grab_cache_folio(mapping, bidx, false);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
if (!check_valid_map(F2FS_I_SB(inode), segno, off)) {
err = -ENOENT;
goto out;
}
- if (f2fs_is_atomic_file(inode)) {
- F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++;
- F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++;
- err = -EAGAIN;
- goto out;
- }
-
- if (f2fs_is_pinned_file(inode)) {
- f2fs_pin_file_control(inode, true);
- err = -EAGAIN;
+ err = f2fs_gc_pinned_control(inode, gc_type, segno);
+ if (err)
goto out;
- }
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = f2fs_get_dnode_of_data(&dn, bidx, LOOKUP_NODE);
@@ -759,7 +1342,7 @@ static int move_data_block(struct inode *inode, block_t bidx,
goto out;
if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
- ClearPageUptodate(page);
+ folio_clear_uptodate(folio);
err = -ENOENT;
goto put_out;
}
@@ -768,145 +1351,138 @@ static int move_data_block(struct inode *inode, block_t bidx,
* don't cache encrypted data into meta inode until previous dirty
* data were writebacked to avoid racing between GC and flush.
*/
- f2fs_wait_on_page_writeback(page, DATA, true, true);
+ f2fs_folio_wait_writeback(folio, DATA, true, true);
f2fs_wait_on_block_writeback(inode, dn.data_blkaddr);
- err = f2fs_get_node_info(fio.sbi, dn.nid, &ni);
+ err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false);
if (err)
goto put_out;
- set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
-
/* read page */
- fio.page = page;
+ fio.folio = folio;
fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr;
if (lfs_mode)
- down_write(&fio.sbi->io_order_lock);
+ f2fs_down_write(&fio.sbi->io_order_lock);
- f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr,
- &sum, CURSEG_COLD_DATA, NULL, false);
-
- fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(fio.sbi),
- newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS);
- if (!fio.encrypted_page) {
- err = -ENOMEM;
- goto recover_block;
+ mfolio = f2fs_grab_cache_folio(META_MAPPING(fio.sbi),
+ fio.old_blkaddr, false);
+ if (IS_ERR(mfolio)) {
+ err = PTR_ERR(mfolio);
+ goto up_out;
}
- mpage = f2fs_pagecache_get_page(META_MAPPING(fio.sbi),
- fio.old_blkaddr, FGP_LOCK, GFP_NOFS);
- if (mpage) {
- bool updated = false;
+ fio.encrypted_page = folio_file_page(mfolio, fio.old_blkaddr);
- if (PageUptodate(mpage)) {
- memcpy(page_address(fio.encrypted_page),
- page_address(mpage), PAGE_SIZE);
- updated = true;
+ /* read source block in mfolio */
+ if (!folio_test_uptodate(mfolio)) {
+ err = f2fs_submit_page_bio(&fio);
+ if (err) {
+ f2fs_folio_put(mfolio, true);
+ goto up_out;
}
- f2fs_put_page(mpage, 1);
- invalidate_mapping_pages(META_MAPPING(fio.sbi),
- fio.old_blkaddr, fio.old_blkaddr);
- if (updated)
- goto write_page;
- }
- err = f2fs_submit_page_bio(&fio);
- if (err)
- goto put_page_out;
+ f2fs_update_iostat(fio.sbi, inode, FS_DATA_READ_IO,
+ F2FS_BLKSIZE);
+ f2fs_update_iostat(fio.sbi, NULL, FS_GDATA_READ_IO,
+ F2FS_BLKSIZE);
+
+ folio_lock(mfolio);
+ if (unlikely(!is_meta_folio(mfolio) ||
+ !folio_test_uptodate(mfolio))) {
+ err = -EIO;
+ f2fs_folio_put(mfolio, true);
+ goto up_out;
+ }
+ }
- /* write page */
- lock_page(fio.encrypted_page);
+ set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
- if (unlikely(fio.encrypted_page->mapping != META_MAPPING(fio.sbi))) {
- err = -EIO;
- goto put_page_out;
+ /* allocate block address */
+ err = f2fs_allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr,
+ &sum, type, NULL);
+ if (err) {
+ f2fs_folio_put(mfolio, true);
+ /* filesystem should shutdown, no need to recovery block */
+ goto up_out;
}
- if (unlikely(!PageUptodate(fio.encrypted_page))) {
- err = -EIO;
- goto put_page_out;
+
+ efolio = f2fs_filemap_get_folio(META_MAPPING(fio.sbi), newaddr,
+ FGP_LOCK | FGP_CREAT, GFP_NOFS);
+ if (IS_ERR(efolio)) {
+ err = PTR_ERR(efolio);
+ f2fs_folio_put(mfolio, true);
+ goto recover_block;
}
-write_page:
+ fio.encrypted_page = &efolio->page;
+
+ /* write target block */
f2fs_wait_on_page_writeback(fio.encrypted_page, DATA, true, true);
+ memcpy(page_address(fio.encrypted_page),
+ folio_address(mfolio), PAGE_SIZE);
+ f2fs_folio_put(mfolio, true);
+
+ f2fs_invalidate_internal_cache(fio.sbi, fio.old_blkaddr, 1);
+
set_page_dirty(fio.encrypted_page);
if (clear_page_dirty_for_io(fio.encrypted_page))
dec_page_count(fio.sbi, F2FS_DIRTY_META);
set_page_writeback(fio.encrypted_page);
- ClearPageError(page);
-
- /* allocate block address */
- f2fs_wait_on_page_writeback(dn.node_page, NODE, true, true);
fio.op = REQ_OP_WRITE;
fio.op_flags = REQ_SYNC;
fio.new_blkaddr = newaddr;
f2fs_submit_page_write(&fio);
- if (fio.retry) {
- err = -EAGAIN;
- if (PageWriteback(fio.encrypted_page))
- end_page_writeback(fio.encrypted_page);
- goto put_page_out;
- }
- f2fs_update_iostat(fio.sbi, FS_GC_DATA_IO, F2FS_BLKSIZE);
+ f2fs_update_iostat(fio.sbi, NULL, FS_GC_DATA_IO, F2FS_BLKSIZE);
f2fs_update_data_blkaddr(&dn, newaddr);
set_inode_flag(inode, FI_APPEND_WRITE);
- if (page->index == 0)
- set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
-put_page_out:
- f2fs_put_page(fio.encrypted_page, 1);
+
+ f2fs_put_page(fio.encrypted_page, true);
recover_block:
- if (lfs_mode)
- up_write(&fio.sbi->io_order_lock);
if (err)
f2fs_do_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr,
- true, true);
+ true, true, true);
+up_out:
+ if (lfs_mode)
+ f2fs_up_write(&fio.sbi->io_order_lock);
put_out:
f2fs_put_dnode(&dn);
out:
- f2fs_put_page(page, 1);
+ f2fs_folio_put(folio, true);
return err;
}
static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
- unsigned int segno, int off)
+ unsigned int segno, int off)
{
- struct page *page;
+ struct folio *folio;
int err = 0;
- page = f2fs_get_lock_data_page(inode, bidx, true);
- if (IS_ERR(page))
- return PTR_ERR(page);
+ folio = f2fs_get_lock_data_folio(inode, bidx, true);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
if (!check_valid_map(F2FS_I_SB(inode), segno, off)) {
err = -ENOENT;
goto out;
}
- if (f2fs_is_atomic_file(inode)) {
- F2FS_I(inode)->i_gc_failures[GC_FAILURE_ATOMIC]++;
- F2FS_I_SB(inode)->skipped_atomic_files[gc_type]++;
- err = -EAGAIN;
- goto out;
- }
- if (f2fs_is_pinned_file(inode)) {
- if (gc_type == FG_GC)
- f2fs_pin_file_control(inode, true);
- err = -EAGAIN;
+ err = f2fs_gc_pinned_control(inode, gc_type, segno);
+ if (err)
goto out;
- }
if (gc_type == BG_GC) {
- if (PageWriteback(page)) {
+ if (folio_test_writeback(folio)) {
err = -EAGAIN;
goto out;
}
- set_page_dirty(page);
- set_cold_data(page);
+ folio_mark_dirty(folio);
+ folio_set_f2fs_gcing(folio);
} else {
struct f2fs_io_info fio = {
.sbi = F2FS_I_SB(inode),
@@ -916,37 +1492,37 @@ static int move_data_page(struct inode *inode, block_t bidx, int gc_type,
.op = REQ_OP_WRITE,
.op_flags = REQ_SYNC,
.old_blkaddr = NULL_ADDR,
- .page = page,
+ .folio = folio,
.encrypted_page = NULL,
.need_lock = LOCK_REQ,
.io_type = FS_GC_DATA_IO,
};
- bool is_dirty = PageDirty(page);
+ bool is_dirty = folio_test_dirty(folio);
retry:
- f2fs_wait_on_page_writeback(page, DATA, true, true);
+ f2fs_folio_wait_writeback(folio, DATA, true, true);
- set_page_dirty(page);
- if (clear_page_dirty_for_io(page)) {
+ folio_mark_dirty(folio);
+ if (folio_clear_dirty_for_io(folio)) {
inode_dec_dirty_pages(inode);
f2fs_remove_dirty_inode(inode);
}
- set_cold_data(page);
+ folio_set_f2fs_gcing(folio);
err = f2fs_do_write_data_page(&fio);
if (err) {
- clear_cold_data(page);
+ folio_clear_f2fs_gcing(folio);
if (err == -ENOMEM) {
- congestion_wait(BLK_RW_ASYNC, HZ/50);
+ memalloc_retry_wait(GFP_NOFS);
goto retry;
}
if (is_dirty)
- set_page_dirty(page);
+ folio_mark_dirty(folio);
}
}
out:
- f2fs_put_page(page, 1);
+ f2fs_folio_put(folio, true);
return err;
}
@@ -958,7 +1534,8 @@ 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;
@@ -966,22 +1543,28 @@ static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
int off;
int phase = 0;
int submitted = 0;
+ unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
start_addr = START_BLOCK(sbi, segno);
next_step:
entry = sum;
- for (off = 0; off < sbi->blocks_per_seg; off++, entry++) {
- struct page *data_page;
+ for (off = 0; off < usable_blks_in_seg; off++, entry++) {
struct inode *inode;
struct node_info dni; /* dnode info for the data */
unsigned int ofs_in_node, nofs;
block_t start_bidx;
nid_t nid = le32_to_cpu(entry->nid);
- /* stop BG_GC if there is not enough free sections. */
- if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0))
+ /*
+ * stop BG_GC if there is not enough free sections.
+ * Or, stop GC if the segment becomes fully valid caused by
+ * race condition along with SSR block allocation.
+ */
+ if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) ||
+ (!force_migrate && get_valid_blocks(sbi, segno, true) ==
+ CAP_BLKS_PER_SEC(sbi)))
return submitted;
if (check_valid_map(sbi, segno, off) == 0)
@@ -1010,11 +1593,36 @@ next_step:
ofs_in_node = le16_to_cpu(entry->ofs_in_node);
if (phase == 3) {
+ struct folio *data_folio;
+ int err;
+
inode = f2fs_iget(sb, dni.ino);
- if (IS_ERR(inode) || is_bad_inode(inode))
+ if (IS_ERR(inode))
+ continue;
+
+ if (is_bad_inode(inode) ||
+ special_file(inode->i_mode)) {
+ iput(inode);
+ continue;
+ }
+
+ if (f2fs_has_inline_data(inode)) {
+ iput(inode);
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ f2fs_err_ratelimited(sbi,
+ "inode %lx has both inline_data flag and "
+ "data block, nid=%u, ofs_in_node=%u",
+ inode->i_ino, dni.nid, ofs_in_node);
continue;
+ }
- if (!down_write_trylock(
+ err = f2fs_gc_pinned_control(inode, gc_type, segno);
+ if (err == -EAGAIN) {
+ iput(inode);
+ return submitted;
+ }
+
+ if (!f2fs_down_write_trylock(
&F2FS_I(inode)->i_gc_rwsem[WRITE])) {
iput(inode);
sbi->skipped_gc_rwsem++;
@@ -1024,10 +1632,10 @@ next_step:
start_bidx = f2fs_start_bidx_of_node(nofs, inode) +
ofs_in_node;
- if (f2fs_post_read_required(inode)) {
+ if (f2fs_meta_inode_gc_required(inode)) {
int err = ra_data_block(inode, start_bidx);
- up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
if (err) {
iput(inode);
continue;
@@ -1036,15 +1644,15 @@ next_step:
continue;
}
- data_page = f2fs_get_read_data_page(inode,
- start_bidx, REQ_RAHEAD, true);
- up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
- if (IS_ERR(data_page)) {
+ data_folio = f2fs_get_read_data_folio(inode, start_bidx,
+ REQ_RAHEAD, true, NULL);
+ f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
+ if (IS_ERR(data_folio)) {
iput(inode);
continue;
}
- f2fs_put_page(data_page, 0);
+ f2fs_folio_put(data_folio, false);
add_gc_inode(gc_list, inode);
continue;
}
@@ -1057,12 +1665,14 @@ next_step:
int err;
if (S_ISREG(inode->i_mode)) {
- if (!down_write_trylock(&fi->i_gc_rwsem[READ]))
+ if (!f2fs_down_write_trylock(&fi->i_gc_rwsem[WRITE])) {
+ sbi->skipped_gc_rwsem++;
continue;
- if (!down_write_trylock(
- &fi->i_gc_rwsem[WRITE])) {
+ }
+ if (!f2fs_down_write_trylock(
+ &fi->i_gc_rwsem[READ])) {
sbi->skipped_gc_rwsem++;
- up_write(&fi->i_gc_rwsem[READ]);
+ f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
continue;
}
locked = true;
@@ -1073,7 +1683,7 @@ next_step:
start_bidx = f2fs_start_bidx_of_node(nofs, inode)
+ ofs_in_node;
- if (f2fs_post_read_required(inode))
+ if (f2fs_meta_inode_gc_required(inode))
err = move_data_block(inode, start_bidx,
gc_type, segno, off);
else
@@ -1081,12 +1691,12 @@ next_step:
segno, off);
if (!err && (gc_type == FG_GC ||
- f2fs_post_read_required(inode)))
+ f2fs_meta_inode_gc_required(inode)))
submitted++;
if (locked) {
- up_write(&fi->i_gc_rwsem[WRITE]);
- up_write(&fi->i_gc_rwsem[READ]);
+ f2fs_up_write(&fi->i_gc_rwsem[READ]);
+ f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
}
stat_inc_data_blk_count(sbi, 1, gc_type);
@@ -1100,140 +1710,201 @@ next_step:
}
static int __get_victim(struct f2fs_sb_info *sbi, unsigned int *victim,
- int gc_type)
+ int gc_type, bool one_time)
{
struct sit_info *sit_i = SIT_I(sbi);
int ret;
down_write(&sit_i->sentry_lock);
- ret = DIRTY_I(sbi)->v_ops->get_victim(sbi, victim, gc_type,
- NO_CHECK_TYPE, LFS);
+ ret = f2fs_get_victim(sbi, victim, gc_type, NO_CHECK_TYPE,
+ LFS, 0, one_time);
up_write(&sit_i->sentry_lock);
return ret;
}
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, bool one_time)
{
- struct page *sum_page;
- struct f2fs_summary_block *sum;
struct blk_plug plug;
unsigned int segno = start_segno;
- unsigned int end_segno = start_segno + sbi->segs_per_sec;
+ unsigned int end_segno = start_segno + SEGS_PER_SEC(sbi);
+ unsigned int sec_end_segno;
int seg_freed = 0, migrated = 0;
unsigned char type = IS_DATASEG(get_seg_entry(sbi, segno)->type) ?
SUM_TYPE_DATA : SUM_TYPE_NODE;
- int submitted = 0;
+ unsigned char data_type = (type == SUM_TYPE_DATA) ? DATA : NODE;
+ int submitted = 0, sum_blk_cnt;
- if (__is_large_section(sbi))
- end_segno = rounddown(end_segno, sbi->segs_per_sec);
+ if (__is_large_section(sbi)) {
+ sec_end_segno = rounddown(end_segno, SEGS_PER_SEC(sbi));
+
+ /*
+ * zone-capacity can be less than zone-size in zoned devices,
+ * resulting in less than expected usable segments in the zone,
+ * calculate the end segno in the zone which can be garbage
+ * collected
+ */
+ if (f2fs_sb_has_blkzoned(sbi))
+ sec_end_segno -= SEGS_PER_SEC(sbi) -
+ f2fs_usable_segs_in_sec(sbi);
+
+ if (gc_type == BG_GC || one_time) {
+ unsigned int window_granularity =
+ sbi->migration_window_granularity;
+ if (f2fs_sb_has_blkzoned(sbi) &&
+ !has_enough_free_blocks(sbi,
+ sbi->gc_thread->boost_zoned_gc_percent))
+ window_granularity *=
+ sbi->gc_thread->boost_gc_multiple;
+
+ end_segno = start_segno + window_granularity;
+ }
+
+ if (end_segno > sec_end_segno)
+ end_segno = sec_end_segno;
+ }
+
+ sanity_check_seg_type(sbi, get_seg_entry(sbi, segno)->type);
+
+ segno = rounddown(segno, SUMS_PER_BLOCK);
+ sum_blk_cnt = DIV_ROUND_UP(end_segno - segno, SUMS_PER_BLOCK);
/* readahead multi ssa blocks those have contiguous address */
if (__is_large_section(sbi))
f2fs_ra_meta_pages(sbi, GET_SUM_BLOCK(sbi, segno),
- end_segno - segno, META_SSA, true);
+ sum_blk_cnt, META_SSA, true);
/* reference all summary page */
while (segno < end_segno) {
- sum_page = f2fs_get_sum_page(sbi, segno++);
- if (IS_ERR(sum_page)) {
- int err = PTR_ERR(sum_page);
+ struct folio *sum_folio = f2fs_get_sum_folio(sbi, segno);
- end_segno = segno - 1;
- for (segno = start_segno; segno < end_segno; segno++) {
- sum_page = find_get_page(META_MAPPING(sbi),
+ segno += SUMS_PER_BLOCK;
+ if (IS_ERR(sum_folio)) {
+ int err = PTR_ERR(sum_folio);
+
+ end_segno = segno - SUMS_PER_BLOCK;
+ segno = rounddown(start_segno, SUMS_PER_BLOCK);
+ while (segno < end_segno) {
+ sum_folio = filemap_get_folio(META_MAPPING(sbi),
GET_SUM_BLOCK(sbi, segno));
- f2fs_put_page(sum_page, 0);
- f2fs_put_page(sum_page, 0);
+ folio_put_refs(sum_folio, 2);
+ segno += SUMS_PER_BLOCK;
}
return err;
}
- unlock_page(sum_page);
+ folio_unlock(sum_folio);
}
blk_start_plug(&plug);
- for (segno = start_segno; segno < end_segno; segno++) {
+ segno = start_segno;
+ while (segno < end_segno) {
+ unsigned int cur_segno;
/* find segment summary of victim */
- sum_page = find_get_page(META_MAPPING(sbi),
+ struct folio *sum_folio = filemap_get_folio(META_MAPPING(sbi),
GET_SUM_BLOCK(sbi, segno));
- f2fs_put_page(sum_page, 0);
-
- if (get_valid_blocks(sbi, segno, false) == 0)
- goto freed;
- if (__is_large_section(sbi) &&
- migrated >= sbi->migration_granularity)
- goto skip;
- if (!PageUptodate(sum_page) || unlikely(f2fs_cp_error(sbi)))
- goto skip;
-
- 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)));
- set_sbi_flag(sbi, SBI_NEED_FSCK);
- goto skip;
+ unsigned int block_end_segno = rounddown(segno, SUMS_PER_BLOCK)
+ + SUMS_PER_BLOCK;
+
+ if (block_end_segno > end_segno)
+ block_end_segno = end_segno;
+
+ if (is_cursec(sbi, GET_SEC_FROM_SEG(sbi, segno))) {
+ f2fs_err(sbi, "%s: segment %u is used by log",
+ __func__, segno);
+ f2fs_bug_on(sbi, 1);
+ goto next_block;
}
- /*
- * this is to avoid deadlock:
- * - lock_page(sum_page) - f2fs_replace_block
- * - check_valid_map() - down_write(sentry_lock)
- * - down_read(sentry_lock) - change_curseg()
- * - lock_page(sum_page)
- */
- if (type == SUM_TYPE_NODE)
- submitted += gc_node_segment(sbi, sum->entries, segno,
- gc_type);
- else
- submitted += gc_data_segment(sbi, sum->entries, gc_list,
- segno, gc_type);
+ if (!folio_test_uptodate(sum_folio) ||
+ unlikely(f2fs_cp_error(sbi)))
+ goto next_block;
- stat_inc_seg_count(sbi, type, gc_type);
+ for (cur_segno = segno; cur_segno < block_end_segno;
+ cur_segno++) {
+ struct f2fs_summary_block *sum;
-freed:
- if (gc_type == FG_GC &&
- get_valid_blocks(sbi, segno, false) == 0)
- seg_freed++;
- migrated++;
+ if (get_valid_blocks(sbi, cur_segno, false) == 0)
+ goto freed;
+ if (gc_type == BG_GC && __is_large_section(sbi) &&
+ migrated >= sbi->migration_granularity)
+ continue;
- if (__is_large_section(sbi) && segno + 1 < end_segno)
- sbi->next_victim_seg[gc_type] = segno + 1;
-skip:
- f2fs_put_page(sum_page, 0);
+ sum = SUM_BLK_PAGE_ADDR(sum_folio, cur_segno);
+ if (type != GET_SUM_TYPE((&sum->footer))) {
+ f2fs_err(sbi, "Inconsistent segment (%u) type "
+ "[%d, %d] in SSA and SIT",
+ cur_segno, type,
+ GET_SUM_TYPE((&sum->footer)));
+ f2fs_stop_checkpoint(sbi, false,
+ STOP_CP_REASON_CORRUPTED_SUMMARY);
+ continue;
+ }
+
+ /*
+ * this is to avoid deadlock:
+ * - lock_page(sum_page) - f2fs_replace_block
+ * - check_valid_map() - down_write(sentry_lock)
+ * - down_read(sentry_lock) - change_curseg()
+ * - lock_page(sum_page)
+ */
+ if (type == SUM_TYPE_NODE)
+ submitted += gc_node_segment(sbi, sum->entries,
+ cur_segno, gc_type);
+ else
+ submitted += gc_data_segment(sbi, sum->entries,
+ gc_list, cur_segno,
+ gc_type, force_migrate);
+
+ stat_inc_gc_seg_count(sbi, data_type, gc_type);
+ sbi->gc_reclaimed_segs[sbi->gc_mode]++;
+ migrated++;
+
+freed:
+ if (gc_type == FG_GC &&
+ get_valid_blocks(sbi, cur_segno, false) == 0)
+ seg_freed++;
+
+ if (__is_large_section(sbi))
+ sbi->next_victim_seg[gc_type] =
+ (cur_segno + 1 < sec_end_segno) ?
+ cur_segno + 1 : NULL_SEGNO;
+ }
+next_block:
+ folio_put_refs(sum_folio, 2);
+ segno = block_end_segno;
}
if (submitted)
- f2fs_submit_merged_write(sbi,
- (type == SUM_TYPE_NODE) ? NODE : DATA);
+ f2fs_submit_merged_write(sbi, data_type);
blk_finish_plug(&plug);
- stat_inc_call_count(sbi->stat_info);
+ if (migrated)
+ stat_inc_gc_sec_count(sbi, data_type, gc_type);
return seg_freed;
}
-int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
- bool background, unsigned int segno)
+int f2fs_gc(struct f2fs_sb_info *sbi, struct f2fs_gc_control *gc_control)
{
- int gc_type = sync ? FG_GC : BG_GC;
- int sec_freed = 0, seg_freed = 0, total_freed = 0;
+ int gc_type = gc_control->init_gc_type;
+ unsigned int segno = gc_control->victim_segno;
+ int sec_freed = 0, seg_freed = 0, total_freed = 0, total_sec_freed = 0;
int ret = 0;
struct cp_control cpc;
- unsigned int init_segno = segno;
struct gc_inode_list gc_list = {
.ilist = LIST_HEAD_INIT(gc_list.ilist),
.iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
};
- unsigned long long last_skipped = sbi->skipped_atomic_files[FG_GC];
- unsigned long long first_skipped;
unsigned int skipped_round = 0, round = 0;
+ unsigned int upper_secs;
- trace_f2fs_gc_begin(sbi->sb, sync, background,
+ trace_f2fs_gc_begin(sbi->sb, gc_type, gc_control->no_bg_gc,
+ gc_control->nr_free_secs,
get_pages(sbi, F2FS_DIRTY_NODES),
get_pages(sbi, F2FS_DIRTY_DENTS),
get_pages(sbi, F2FS_DIRTY_IMETA),
@@ -1243,9 +1914,8 @@ int f2fs_gc(struct f2fs_sb_info *sbi, bool sync,
prefree_segments(sbi));
cpc.reason = __get_cp_reason(sbi);
- sbi->skipped_gc_rwsem = 0;
- first_skipped = last_skipped;
gc_more:
+ sbi->skipped_gc_rwsem = 0;
if (unlikely(!(sbi->sb->s_flags & SB_ACTIVE))) {
ret = -EINVAL;
goto stop;
@@ -1255,73 +1925,108 @@ gc_more:
goto stop;
}
- if (gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) {
+ /* Let's run FG_GC, if we don't have enough space. */
+ if (has_not_enough_free_secs(sbi, 0, 0)) {
+ gc_type = FG_GC;
+ gc_control->one_time = false;
+
/*
* For example, if there are many prefree_segments below given
* threshold, we can make them free by checkpoint. Then, we
* secure free segments which doesn't need fggc any more.
*/
- if (prefree_segments(sbi) &&
- !is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
+ if (prefree_segments(sbi)) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
ret = f2fs_write_checkpoint(sbi, &cpc);
if (ret)
goto stop;
+ /* Reset due to checkpoint */
+ sec_freed = 0;
}
- if (has_not_enough_free_secs(sbi, 0, 0))
- gc_type = FG_GC;
}
/* f2fs_balance_fs doesn't need to do BG_GC in critical path. */
- if (gc_type == BG_GC && !background) {
+ if (gc_type == BG_GC && gc_control->no_bg_gc) {
ret = -EINVAL;
goto stop;
}
- if (!__get_victim(sbi, &segno, gc_type)) {
- ret = -ENODATA;
+retry:
+ ret = __get_victim(sbi, &segno, gc_type, gc_control->one_time);
+ if (ret) {
+ /* allow to search victim from sections has pinned data */
+ if (ret == -ENODATA && gc_type == FG_GC &&
+ f2fs_pinned_section_exists(DIRTY_I(sbi))) {
+ f2fs_unpin_all_sections(sbi, false);
+ goto retry;
+ }
goto stop;
}
- seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type);
- if (gc_type == FG_GC && seg_freed == sbi->segs_per_sec)
- sec_freed++;
+ seg_freed = do_garbage_collect(sbi, segno, &gc_list, gc_type,
+ gc_control->should_migrate_blocks,
+ gc_control->one_time);
+ if (seg_freed < 0)
+ goto stop;
+
total_freed += seg_freed;
- if (gc_type == FG_GC) {
- if (sbi->skipped_atomic_files[FG_GC] > last_skipped ||
- sbi->skipped_gc_rwsem)
- skipped_round++;
- last_skipped = sbi->skipped_atomic_files[FG_GC];
- round++;
+ if (seg_freed == f2fs_usable_segs_in_sec(sbi)) {
+ sec_freed++;
+ total_sec_freed++;
}
- if (gc_type == FG_GC)
- sbi->cur_victim_sec = NULL_SEGNO;
-
- if (sync)
+ if (gc_control->one_time)
goto stop;
- if (has_not_enough_free_secs(sbi, sec_freed, 0)) {
- if (skipped_round <= MAX_SKIP_GC_COUNT ||
- skipped_round * 2 < round) {
- segno = NULL_SEGNO;
- goto gc_more;
- }
+ if (gc_type == FG_GC) {
+ sbi->cur_victim_sec = NULL_SEGNO;
- if (first_skipped < last_skipped &&
- (last_skipped - first_skipped) >
- sbi->skipped_gc_rwsem) {
- f2fs_drop_inmem_pages_all(sbi, true);
- segno = NULL_SEGNO;
- goto gc_more;
+ if (has_enough_free_secs(sbi, sec_freed, 0)) {
+ if (!gc_control->no_bg_gc &&
+ total_sec_freed < gc_control->nr_free_secs)
+ goto go_gc_more;
+ goto stop;
}
- if (gc_type == FG_GC && !is_sbi_flag_set(sbi, SBI_CP_DISABLED))
+ if (sbi->skipped_gc_rwsem)
+ skipped_round++;
+ round++;
+ if (skipped_round > MAX_SKIP_GC_COUNT &&
+ skipped_round * 2 >= round) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
ret = f2fs_write_checkpoint(sbi, &cpc);
+ goto stop;
+ }
+ } else if (has_enough_free_secs(sbi, 0, 0)) {
+ goto stop;
+ }
+
+ __get_secs_required(sbi, NULL, &upper_secs, NULL);
+
+ /*
+ * Write checkpoint to reclaim prefree segments.
+ * We need more three extra sections for writer's data/node/dentry.
+ */
+ if (free_sections(sbi) <= upper_secs + NR_GC_CHECKPOINT_SECS &&
+ prefree_segments(sbi)) {
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
+ ret = f2fs_write_checkpoint(sbi, &cpc);
+ if (ret)
+ goto stop;
+ /* Reset due to checkpoint */
+ sec_freed = 0;
}
+go_gc_more:
+ segno = NULL_SEGNO;
+ goto gc_more;
+
stop:
SIT_I(sbi)->last_victim[ALLOC_NEXT] = 0;
- SIT_I(sbi)->last_victim[FLUSH_DEVICE] = init_segno;
+ SIT_I(sbi)->last_victim[FLUSH_DEVICE] = gc_control->victim_segno;
+
+ if (gc_type == FG_GC)
+ f2fs_unpin_all_sections(sbi, true);
- trace_f2fs_gc_end(sbi->sb, ret, total_freed, sec_freed,
+ trace_f2fs_gc_end(sbi->sb, ret, total_freed, total_sec_freed,
get_pages(sbi, F2FS_DIRTY_NODES),
get_pages(sbi, F2FS_DIRTY_DENTS),
get_pages(sbi, F2FS_DIRTY_IMETA),
@@ -1330,23 +2035,355 @@ stop:
reserved_segments(sbi),
prefree_segments(sbi));
- mutex_unlock(&sbi->gc_mutex);
+ f2fs_up_write(&sbi->gc_lock);
put_gc_inode(&gc_list);
- if (sync && !ret)
- ret = sec_freed ? 0 : -EAGAIN;
+ if (gc_control->err_gc_skipped && !ret)
+ ret = total_sec_freed ? 0 : -EAGAIN;
return ret;
}
-void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
+int __init f2fs_create_garbage_collection_cache(void)
+{
+ victim_entry_slab = f2fs_kmem_cache_create("f2fs_victim_entry",
+ sizeof(struct victim_entry));
+ return victim_entry_slab ? 0 : -ENOMEM;
+}
+
+void f2fs_destroy_garbage_collection_cache(void)
{
- DIRTY_I(sbi)->v_ops = &default_v_ops;
+ kmem_cache_destroy(victim_entry_slab);
+}
+
+static void init_atgc_management(struct f2fs_sb_info *sbi)
+{
+ struct atgc_management *am = &sbi->am;
+
+ if (test_opt(sbi, ATGC) &&
+ SIT_I(sbi)->elapsed_time >= DEF_GC_THREAD_AGE_THRESHOLD)
+ am->atgc_enabled = true;
+ am->root = RB_ROOT_CACHED;
+ INIT_LIST_HEAD(&am->victim_list);
+ am->victim_count = 0;
+
+ am->candidate_ratio = DEF_GC_THREAD_CANDIDATE_RATIO;
+ am->max_candidate_count = DEF_GC_THREAD_MAX_CANDIDATE_COUNT;
+ am->age_weight = DEF_GC_THREAD_AGE_WEIGHT;
+ am->age_threshold = DEF_GC_THREAD_AGE_THRESHOLD;
+}
+
+void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
+{
sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES;
/* give warm/cold data area from slower device */
- if (sbi->s_ndevs && !__is_large_section(sbi))
+ if (f2fs_is_multi_device(sbi) && !__is_large_section(sbi))
SIT_I(sbi)->last_victim[ALLOC_NEXT] =
GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
+
+ init_atgc_management(sbi);
+}
+
+int f2fs_gc_range(struct f2fs_sb_info *sbi,
+ unsigned int start_seg, unsigned int end_seg,
+ bool dry_run, unsigned int dry_run_sections)
+{
+ unsigned int segno;
+ unsigned int gc_secs = dry_run_sections;
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ return -EIO;
+
+ for (segno = start_seg; segno <= end_seg; segno += SEGS_PER_SEC(sbi)) {
+ struct gc_inode_list gc_list = {
+ .ilist = LIST_HEAD_INIT(gc_list.ilist),
+ .iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
+ };
+
+ /*
+ * avoid migrating empty section, as it can be allocated by
+ * log in parallel.
+ */
+ if (!get_valid_blocks(sbi, segno, true))
+ continue;
+
+ if (is_cursec(sbi, GET_SEC_FROM_SEG(sbi, segno)))
+ continue;
+
+ do_garbage_collect(sbi, segno, &gc_list, FG_GC, true, false);
+ put_gc_inode(&gc_list);
+
+ if (!dry_run && get_valid_blocks(sbi, segno, true))
+ return -EAGAIN;
+ if (dry_run && dry_run_sections &&
+ !get_valid_blocks(sbi, segno, true) && --gc_secs == 0)
+ break;
+
+ if (fatal_signal_pending(current))
+ return -ERESTARTSYS;
+ }
+
+ return 0;
+}
+
+static int free_segment_range(struct f2fs_sb_info *sbi,
+ unsigned int secs, bool dry_run)
+{
+ unsigned int next_inuse, start, end;
+ struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
+ int gc_mode, gc_type;
+ int err = 0;
+ int type;
+
+ /* Force block allocation for GC */
+ MAIN_SECS(sbi) -= secs;
+ start = MAIN_SECS(sbi) * SEGS_PER_SEC(sbi);
+ end = MAIN_SEGS(sbi) - 1;
+
+ mutex_lock(&DIRTY_I(sbi)->seglist_lock);
+ for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
+ if (SIT_I(sbi)->last_victim[gc_mode] >= start)
+ 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] >= start)
+ sbi->next_victim_seg[gc_type] = NULL_SEGNO;
+ mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
+
+ /* Move out cursegs from the target range */
+ for (type = CURSEG_HOT_DATA; type < NR_CURSEG_PERSIST_TYPE; type++) {
+ err = f2fs_allocate_segment_for_resize(sbi, type, start, end);
+ if (err)
+ goto out;
+ }
+
+ /* do GC to move out valid blocks in the range */
+ err = f2fs_gc_range(sbi, start, end, dry_run, 0);
+ if (err || dry_run)
+ goto out;
+
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
+ err = f2fs_write_checkpoint(sbi, &cpc);
+ if (err)
+ goto out;
+
+ 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);
+ }
+out:
+ MAIN_SECS(sbi) += secs;
+ 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;
+ int segment_count;
+ int segment_count_main;
+ long long block_count;
+ int segs = secs * SEGS_PER_SEC(sbi);
+
+ f2fs_down_write(&sbi->sb_lock);
+
+ section_count = le32_to_cpu(raw_sb->section_count);
+ segment_count = le32_to_cpu(raw_sb->segment_count);
+ segment_count_main = le32_to_cpu(raw_sb->segment_count_main);
+ block_count = le64_to_cpu(raw_sb->block_count);
+
+ 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_TO_BLKS(sbi, segs));
+ if (f2fs_is_multi_device(sbi)) {
+ int last_dev = sbi->s_ndevs - 1;
+ int dev_segs =
+ le32_to_cpu(raw_sb->devs[last_dev].total_segments);
+
+ raw_sb->devs[last_dev].total_segments =
+ cpu_to_le32(dev_segs + segs);
+ }
+
+ f2fs_up_write(&sbi->sb_lock);
+}
+
+static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+ int segs = secs * SEGS_PER_SEC(sbi);
+ long long blks = SEGS_TO_BLKS(sbi, segs);
+ 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;
+ MAIN_SECS(sbi) += secs;
+ if (sbi->allocate_section_hint > MAIN_SECS(sbi))
+ sbi->allocate_section_hint = MAIN_SECS(sbi);
+ 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 + blks);
+
+ if (f2fs_is_multi_device(sbi)) {
+ int last_dev = sbi->s_ndevs - 1;
+
+ sbi->allocate_section_hint = FDEV(0).total_segments /
+ SEGS_PER_SEC(sbi);
+
+ FDEV(last_dev).total_segments =
+ (int)FDEV(last_dev).total_segments + segs;
+ FDEV(last_dev).end_blk =
+ (long long)FDEV(last_dev).end_blk + blks;
+#ifdef CONFIG_BLK_DEV_ZONED
+ FDEV(last_dev).nr_blkz = FDEV(last_dev).nr_blkz +
+ div_u64(blks, sbi->blocks_per_blkz);
+#endif
+ }
+}
+
+int f2fs_resize_fs(struct file *filp, __u64 block_count)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
+ __u64 old_block_count, shrunk_blocks;
+ struct cp_control cpc = { CP_RESIZE, 0, 0, 0 };
+ unsigned int secs;
+ 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;
+
+ if (f2fs_is_multi_device(sbi)) {
+ int last_dev = sbi->s_ndevs - 1;
+ __u64 last_segs = FDEV(last_dev).total_segments;
+
+ if (block_count + SEGS_TO_BLKS(sbi, last_segs) <=
+ 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;
+ }
+
+ err = mnt_want_write_file(filp);
+ if (err)
+ return err;
+
+ shrunk_blocks = old_block_count - block_count;
+ secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
+
+ /* stop other GC */
+ if (!f2fs_down_write_trylock(&sbi->gc_lock)) {
+ err = -EAGAIN;
+ goto out_drop_write;
+ }
+
+ /* stop CP to protect MAIN_SEC in free_segment_range */
+ f2fs_lock_op(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;
+ spin_unlock(&sbi->stat_lock);
+
+ if (err)
+ goto out_unlock;
+
+ err = free_segment_range(sbi, secs, true);
+
+out_unlock:
+ f2fs_unlock_op(sbi);
+ f2fs_up_write(&sbi->gc_lock);
+out_drop_write:
+ mnt_drop_write_file(filp);
+ if (err)
+ return err;
+
+ err = freeze_super(sbi->sb, FREEZE_HOLDER_KERNEL, NULL);
+ if (err)
+ return err;
+
+ if (f2fs_readonly(sbi->sb)) {
+ err = thaw_super(sbi->sb, FREEZE_HOLDER_KERNEL, NULL);
+ if (err)
+ return err;
+ return -EROFS;
+ }
+
+ f2fs_down_write(&sbi->gc_lock);
+ f2fs_down_write(&sbi->cp_global_sem);
+
+ 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)
+ goto out_err;
+
+ set_sbi_flag(sbi, SBI_IS_RESIZEFS);
+ err = free_segment_range(sbi, secs, false);
+ if (err)
+ goto recover_out;
+
+ update_sb_metadata(sbi, -secs);
+
+ err = f2fs_commit_super(sbi, false);
+ if (err) {
+ update_sb_metadata(sbi, secs);
+ goto recover_out;
+ }
+
+ update_fs_metadata(sbi, -secs);
+ clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+ set_sbi_flag(sbi, SBI_IS_DIRTY);
+
+ stat_inc_cp_call_count(sbi, TOTAL_CALL);
+ err = f2fs_write_checkpoint(sbi, &cpc);
+ if (err) {
+ update_fs_metadata(sbi, secs);
+ update_sb_metadata(sbi, secs);
+ f2fs_commit_super(sbi, false);
+ }
+recover_out:
+ clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+ if (err) {
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ f2fs_err(sbi, "resize_fs failed, should run fsck to repair!");
+
+ spin_lock(&sbi->stat_lock);
+ sbi->user_block_count += shrunk_blocks;
+ spin_unlock(&sbi->stat_lock);
+ }
+out_err:
+ f2fs_up_write(&sbi->cp_global_sem);
+ f2fs_up_write(&sbi->gc_lock);
+ thaw_super(sbi->sb, FREEZE_HOLDER_KERNEL, NULL);
+ return err;
}
generated by cgit (git 2.34.1) at 2025-12-24 23:54:47 +0000