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linux/fs/f2fs/segment.c
Sunmin Jeong b40a2b0037 f2fs: use meta inode for GC of atomic file 
The page cache of the atomic file keeps new data pages which will be
stored in the COW file. It can also keep old data pages when GCing the
atomic file. In this case, new data can be overwritten by old data if a
GC thread sets the old data page as dirty after new data page was
evicted.

Also, since all writes to the atomic file are redirected to COW inodes,
GC for the atomic file is not working well as below.

f2fs_gc(gc_type=FG_GC)
  - select A as a victim segment
  do_garbage_collect
    - iget atomic file's inode for block B
    move_data_page
      f2fs_do_write_data_page
        - use dn of cow inode
        - set fio->old_blkaddr from cow inode
    - seg_freed is 0 since block B is still valid
  - goto gc_more and A is selected as victim again

To solve the problem, let's separate GC writes and updates in the atomic
file by using the meta inode for GC writes.

Fixes: 3db1de0e58 ("f2fs: change the current atomic write way")
Cc: stable@vger.kernel.org #v5.19+
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Reviewed-by: Yeongjin Gil <youngjin.gil@samsung.com>
Signed-off-by: Sunmin Jeong <s_min.jeong@samsung.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2024-07-10 22:48:04 +00:00

5644 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* fs/f2fs/segment.c
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*/
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/sched/mm.h>
#include <linux/prefetch.h>
#include <linux/kthread.h>
#include <linux/swap.h>
#include <linux/timer.h>
#include <linux/freezer.h>
#include <linux/sched/signal.h>
#include <linux/random.h>
#include "f2fs.h"
#include "segment.h"
#include "node.h"
#include "gc.h"
#include "iostat.h"
#include <trace/events/f2fs.h>
#define __reverse_ffz(x) __reverse_ffs(~(x))
static struct kmem_cache *discard_entry_slab;
static struct kmem_cache *discard_cmd_slab;
static struct kmem_cache *sit_entry_set_slab;
static struct kmem_cache *revoke_entry_slab;
static unsigned long __reverse_ulong(unsigned char *str)
{
unsigned long tmp = 0;
int shift = 24, idx = 0;
#if BITS_PER_LONG == 64
shift = 56;
#endif
while (shift >= 0) {
tmp |= (unsigned long)str[idx++] << shift;
shift -= BITS_PER_BYTE;
}
return tmp;
}
/*
* __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since
* MSB and LSB are reversed in a byte by f2fs_set_bit.
*/
static inline unsigned long __reverse_ffs(unsigned long word)
{
int num = 0;
#if BITS_PER_LONG == 64
if ((word & 0xffffffff00000000UL) == 0)
num += 32;
else
word >>= 32;
#endif
if ((word & 0xffff0000) == 0)
num += 16;
else
word >>= 16;
if ((word & 0xff00) == 0)
num += 8;
else
word >>= 8;
if ((word & 0xf0) == 0)
num += 4;
else
word >>= 4;
if ((word & 0xc) == 0)
num += 2;
else
word >>= 2;
if ((word & 0x2) == 0)
num += 1;
return num;
}
/*
* __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because
* f2fs_set_bit makes MSB and LSB reversed in a byte.
* @size must be integral times of unsigned long.
* Example:
* MSB <--> LSB
* f2fs_set_bit(0, bitmap) => 1000 0000
* f2fs_set_bit(7, bitmap) => 0000 0001
*/
static unsigned long __find_rev_next_bit(const unsigned long *addr,
unsigned long size, unsigned long offset)
{
const unsigned long *p = addr + BIT_WORD(offset);
unsigned long result = size;
unsigned long tmp;
if (offset >= size)
return size;
size -= (offset & ~(BITS_PER_LONG - 1));
offset %= BITS_PER_LONG;
while (1) {
if (*p == 0)
goto pass;
tmp = __reverse_ulong((unsigned char *)p);
tmp &= ~0UL >> offset;
if (size < BITS_PER_LONG)
tmp &= (~0UL << (BITS_PER_LONG - size));
if (tmp)
goto found;
pass:
if (size <= BITS_PER_LONG)
break;
size -= BITS_PER_LONG;
offset = 0;
p++;
}
return result;
found:
return result - size + __reverse_ffs(tmp);
}
static unsigned long __find_rev_next_zero_bit(const unsigned long *addr,
unsigned long size, unsigned long offset)
{
const unsigned long *p = addr + BIT_WORD(offset);
unsigned long result = size;
unsigned long tmp;
if (offset >= size)
return size;
size -= (offset & ~(BITS_PER_LONG - 1));
offset %= BITS_PER_LONG;
while (1) {
if (*p == ~0UL)
goto pass;
tmp = __reverse_ulong((unsigned char *)p);
if (offset)
tmp |= ~0UL << (BITS_PER_LONG - offset);
if (size < BITS_PER_LONG)
tmp |= ~0UL >> size;
if (tmp != ~0UL)
goto found;
pass:
if (size <= BITS_PER_LONG)
break;
size -= BITS_PER_LONG;
offset = 0;
p++;
}
return result;
found:
return result - size + __reverse_ffz(tmp);
}
bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
{
int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
if (f2fs_lfs_mode(sbi))
return false;
if (sbi->gc_mode == GC_URGENT_HIGH)
return true;
if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
return true;
return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
SM_I(sbi)->min_ssr_sections + reserved_sections(sbi));
}
void f2fs_abort_atomic_write(struct inode *inode, bool clean)
{
struct f2fs_inode_info *fi = F2FS_I(inode);
if (!f2fs_is_atomic_file(inode))
return;
if (clean)
truncate_inode_pages_final(inode->i_mapping);
release_atomic_write_cnt(inode);
clear_inode_flag(inode, FI_ATOMIC_COMMITTED);
clear_inode_flag(inode, FI_ATOMIC_REPLACE);
clear_inode_flag(inode, FI_ATOMIC_FILE);
stat_dec_atomic_inode(inode);
F2FS_I(inode)->atomic_write_task = NULL;
if (clean) {
f2fs_i_size_write(inode, fi->original_i_size);
fi->original_i_size = 0;
}
/* avoid stale dirty inode during eviction */
sync_inode_metadata(inode, 0);
}
static int __replace_atomic_write_block(struct inode *inode, pgoff_t index,
block_t new_addr, block_t *old_addr, bool recover)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dnode_of_data dn;
struct node_info ni;
int err;
retry:
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = f2fs_get_dnode_of_data(&dn, index, ALLOC_NODE);
if (err) {
if (err == -ENOMEM) {
f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
goto retry;
}
return err;
}
err = f2fs_get_node_info(sbi, dn.nid, &ni, false);
if (err) {
f2fs_put_dnode(&dn);
return err;
}
if (recover) {
/* dn.data_blkaddr is always valid */
if (!__is_valid_data_blkaddr(new_addr)) {
if (new_addr == NULL_ADDR)
dec_valid_block_count(sbi, inode, 1);
f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
f2fs_update_data_blkaddr(&dn, new_addr);
} else {
f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
new_addr, ni.version, true, true);
}
} else {
blkcnt_t count = 1;
err = inc_valid_block_count(sbi, inode, &count, true);
if (err) {
f2fs_put_dnode(&dn);
return err;
}
*old_addr = dn.data_blkaddr;
f2fs_truncate_data_blocks_range(&dn, 1);
dec_valid_block_count(sbi, F2FS_I(inode)->cow_inode, count);
f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr,
ni.version, true, false);
}
f2fs_put_dnode(&dn);
trace_f2fs_replace_atomic_write_block(inode, F2FS_I(inode)->cow_inode,
index, old_addr ? *old_addr : 0, new_addr, recover);
return 0;
}
static void __complete_revoke_list(struct inode *inode, struct list_head *head,
bool revoke)
{
struct revoke_entry *cur, *tmp;
pgoff_t start_index = 0;
bool truncate = is_inode_flag_set(inode, FI_ATOMIC_REPLACE);
list_for_each_entry_safe(cur, tmp, head, list) {
if (revoke) {
__replace_atomic_write_block(inode, cur->index,
cur->old_addr, NULL, true);
} else if (truncate) {
f2fs_truncate_hole(inode, start_index, cur->index);
start_index = cur->index + 1;
}
list_del(&cur->list);
kmem_cache_free(revoke_entry_slab, cur);
}
if (!revoke && truncate)
f2fs_do_truncate_blocks(inode, start_index * PAGE_SIZE, false);
}
static int __f2fs_commit_atomic_write(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_inode_info *fi = F2FS_I(inode);
struct inode *cow_inode = fi->cow_inode;
struct revoke_entry *new;
struct list_head revoke_list;
block_t blkaddr;
struct dnode_of_data dn;
pgoff_t len = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
pgoff_t off = 0, blen, index;
int ret = 0, i;
INIT_LIST_HEAD(&revoke_list);
while (len) {
blen = min_t(pgoff_t, ADDRS_PER_BLOCK(cow_inode), len);
set_new_dnode(&dn, cow_inode, NULL, NULL, 0);
ret = f2fs_get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
if (ret && ret != -ENOENT) {
goto out;
} else if (ret == -ENOENT) {
ret = 0;
if (dn.max_level == 0)
goto out;
goto next;
}
blen = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, cow_inode),
len);
index = off;
for (i = 0; i < blen; i++, dn.ofs_in_node++, index++) {
blkaddr = f2fs_data_blkaddr(&dn);
if (!__is_valid_data_blkaddr(blkaddr)) {
continue;
} else if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
DATA_GENERIC_ENHANCE)) {
f2fs_put_dnode(&dn);
ret = -EFSCORRUPTED;
goto out;
}
new = f2fs_kmem_cache_alloc(revoke_entry_slab, GFP_NOFS,
true, NULL);
ret = __replace_atomic_write_block(inode, index, blkaddr,
&new->old_addr, false);
if (ret) {
f2fs_put_dnode(&dn);
kmem_cache_free(revoke_entry_slab, new);
goto out;
}
f2fs_update_data_blkaddr(&dn, NULL_ADDR);
new->index = index;
list_add_tail(&new->list, &revoke_list);
}
f2fs_put_dnode(&dn);
next:
off += blen;
len -= blen;
}
out:
if (ret) {
sbi->revoked_atomic_block += fi->atomic_write_cnt;
} else {
sbi->committed_atomic_block += fi->atomic_write_cnt;
set_inode_flag(inode, FI_ATOMIC_COMMITTED);
}
__complete_revoke_list(inode, &revoke_list, ret ? true : false);
return ret;
}
int f2fs_commit_atomic_write(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_inode_info *fi = F2FS_I(inode);
int err;
err = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
if (err)
return err;
f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
f2fs_lock_op(sbi);
err = __f2fs_commit_atomic_write(inode);
f2fs_unlock_op(sbi);
f2fs_up_write(&fi->i_gc_rwsem[WRITE]);
return err;
}
/*
* This function balances dirty node and dentry pages.
* In addition, it controls garbage collection.
*/
void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
{
if (f2fs_cp_error(sbi))
return;
if (time_to_inject(sbi, FAULT_CHECKPOINT))
f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_FAULT_INJECT);
/* balance_fs_bg is able to be pending */
if (need && excess_cached_nats(sbi))
f2fs_balance_fs_bg(sbi, false);
if (!f2fs_is_checkpoint_ready(sbi))
return;
/*
* We should do GC or end up with checkpoint, if there are so many dirty
* dir/node pages without enough free segments.
*/
if (has_enough_free_secs(sbi, 0, 0))
return;
if (test_opt(sbi, GC_MERGE) && sbi->gc_thread &&
sbi->gc_thread->f2fs_gc_task) {
DEFINE_WAIT(wait);
prepare_to_wait(&sbi->gc_thread->fggc_wq, &wait,
TASK_UNINTERRUPTIBLE);
wake_up(&sbi->gc_thread->gc_wait_queue_head);
io_schedule();
finish_wait(&sbi->gc_thread->fggc_wq, &wait);
} else {
struct f2fs_gc_control gc_control = {
.victim_segno = NULL_SEGNO,
.init_gc_type = BG_GC,
.no_bg_gc = true,
.should_migrate_blocks = false,
.err_gc_skipped = false,
.nr_free_secs = 1 };
f2fs_down_write(&sbi->gc_lock);
stat_inc_gc_call_count(sbi, FOREGROUND);
f2fs_gc(sbi, &gc_control);
}
}
static inline bool excess_dirty_threshold(struct f2fs_sb_info *sbi)
{
int factor = f2fs_rwsem_is_locked(&sbi->cp_rwsem) ? 3 : 2;
unsigned int dents = get_pages(sbi, F2FS_DIRTY_DENTS);
unsigned int qdata = get_pages(sbi, F2FS_DIRTY_QDATA);
unsigned int nodes = get_pages(sbi, F2FS_DIRTY_NODES);
unsigned int meta = get_pages(sbi, F2FS_DIRTY_META);
unsigned int imeta = get_pages(sbi, F2FS_DIRTY_IMETA);
unsigned int threshold =
SEGS_TO_BLKS(sbi, (factor * DEFAULT_DIRTY_THRESHOLD));
unsigned int global_threshold = threshold * 3 / 2;
if (dents >= threshold || qdata >= threshold ||
nodes >= threshold || meta >= threshold ||
imeta >= threshold)
return true;
return dents + qdata + nodes + meta + imeta > global_threshold;
}
void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi, bool from_bg)
{
if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
return;
/* try to shrink extent cache when there is no enough memory */
if (!f2fs_available_free_memory(sbi, READ_EXTENT_CACHE))
f2fs_shrink_read_extent_tree(sbi,
READ_EXTENT_CACHE_SHRINK_NUMBER);
/* try to shrink age extent cache when there is no enough memory */
if (!f2fs_available_free_memory(sbi, AGE_EXTENT_CACHE))
f2fs_shrink_age_extent_tree(sbi,
AGE_EXTENT_CACHE_SHRINK_NUMBER);
/* check the # of cached NAT entries */
if (!f2fs_available_free_memory(sbi, NAT_ENTRIES))
f2fs_try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK);
if (!f2fs_available_free_memory(sbi, FREE_NIDS))
f2fs_try_to_free_nids(sbi, MAX_FREE_NIDS);
else
f2fs_build_free_nids(sbi, false, false);
if (excess_dirty_nats(sbi) || excess_dirty_threshold(sbi) ||
excess_prefree_segs(sbi) || !f2fs_space_for_roll_forward(sbi))
goto do_sync;
/* there is background inflight IO or foreground operation recently */
if (is_inflight_io(sbi, REQ_TIME) ||
(!f2fs_time_over(sbi, REQ_TIME) && f2fs_rwsem_is_locked(&sbi->cp_rwsem)))
return;
/* exceed periodical checkpoint timeout threshold */
if (f2fs_time_over(sbi, CP_TIME))
goto do_sync;
/* checkpoint is the only way to shrink partial cached entries */
if (f2fs_available_free_memory(sbi, NAT_ENTRIES) &&
f2fs_available_free_memory(sbi, INO_ENTRIES))
return;
do_sync:
if (test_opt(sbi, DATA_FLUSH) && from_bg) {
struct blk_plug plug;
mutex_lock(&sbi->flush_lock);
blk_start_plug(&plug);
f2fs_sync_dirty_inodes(sbi, FILE_INODE, false);
blk_finish_plug(&plug);
mutex_unlock(&sbi->flush_lock);
}
stat_inc_cp_call_count(sbi, BACKGROUND);
f2fs_sync_fs(sbi->sb, 1);
}
static int __submit_flush_wait(struct f2fs_sb_info *sbi,
struct block_device *bdev)
{
int ret = blkdev_issue_flush(bdev);
trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER),
test_opt(sbi, FLUSH_MERGE), ret);
if (!ret)
f2fs_update_iostat(sbi, NULL, FS_FLUSH_IO, 0);
return ret;
}
static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
{
int ret = 0;
int i;
if (!f2fs_is_multi_device(sbi))
return __submit_flush_wait(sbi, sbi->sb->s_bdev);
for (i = 0; i < sbi->s_ndevs; i++) {
if (!f2fs_is_dirty_device(sbi, ino, i, FLUSH_INO))
continue;
ret = __submit_flush_wait(sbi, FDEV(i).bdev);
if (ret)
break;
}
return ret;
}
static int issue_flush_thread(void *data)
{
struct f2fs_sb_info *sbi = data;
struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
wait_queue_head_t *q = &fcc->flush_wait_queue;
repeat:
if (kthread_should_stop())
return 0;
if (!llist_empty(&fcc->issue_list)) {
struct flush_cmd *cmd, *next;
int ret;
fcc->dispatch_list = llist_del_all(&fcc->issue_list);
fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list);
cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode);
ret = submit_flush_wait(sbi, cmd->ino);
atomic_inc(&fcc->issued_flush);
llist_for_each_entry_safe(cmd, next,
fcc->dispatch_list, llnode) {
cmd->ret = ret;
complete(&cmd->wait);
}
fcc->dispatch_list = NULL;
}
wait_event_interruptible(*q,
kthread_should_stop() || !llist_empty(&fcc->issue_list));
goto repeat;
}
int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
{
struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
struct flush_cmd cmd;
int ret;
if (test_opt(sbi, NOBARRIER))
return 0;
if (!test_opt(sbi, FLUSH_MERGE)) {
atomic_inc(&fcc->queued_flush);
ret = submit_flush_wait(sbi, ino);
atomic_dec(&fcc->queued_flush);
atomic_inc(&fcc->issued_flush);
return ret;
}
if (atomic_inc_return(&fcc->queued_flush) == 1 ||
f2fs_is_multi_device(sbi)) {
ret = submit_flush_wait(sbi, ino);
atomic_dec(&fcc->queued_flush);
atomic_inc(&fcc->issued_flush);
return ret;
}
cmd.ino = ino;
init_completion(&cmd.wait);
llist_add(&cmd.llnode, &fcc->issue_list);
/*
* update issue_list before we wake up issue_flush thread, this
* smp_mb() pairs with another barrier in ___wait_event(), see
* more details in comments of waitqueue_active().
*/
smp_mb();
if (waitqueue_active(&fcc->flush_wait_queue))
wake_up(&fcc->flush_wait_queue);
if (fcc->f2fs_issue_flush) {
wait_for_completion(&cmd.wait);
atomic_dec(&fcc->queued_flush);
} else {
struct llist_node *list;
list = llist_del_all(&fcc->issue_list);
if (!list) {
wait_for_completion(&cmd.wait);
atomic_dec(&fcc->queued_flush);
} else {
struct flush_cmd *tmp, *next;
ret = submit_flush_wait(sbi, ino);
llist_for_each_entry_safe(tmp, next, list, llnode) {
if (tmp == &cmd) {
cmd.ret = ret;
atomic_dec(&fcc->queued_flush);
continue;
}
tmp->ret = ret;
complete(&tmp->wait);
}
}
}
return cmd.ret;
}
int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi)
{
dev_t dev = sbi->sb->s_bdev->bd_dev;
struct flush_cmd_control *fcc;
if (SM_I(sbi)->fcc_info) {
fcc = SM_I(sbi)->fcc_info;
if (fcc->f2fs_issue_flush)
return 0;
goto init_thread;
}
fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL);
if (!fcc)
return -ENOMEM;
atomic_set(&fcc->issued_flush, 0);
atomic_set(&fcc->queued_flush, 0);
init_waitqueue_head(&fcc->flush_wait_queue);
init_llist_head(&fcc->issue_list);
SM_I(sbi)->fcc_info = fcc;
if (!test_opt(sbi, FLUSH_MERGE))
return 0;
init_thread:
fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
"f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(fcc->f2fs_issue_flush)) {
int err = PTR_ERR(fcc->f2fs_issue_flush);
fcc->f2fs_issue_flush = NULL;
return err;
}
return 0;
}
void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
{
struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
if (fcc && fcc->f2fs_issue_flush) {
struct task_struct *flush_thread = fcc->f2fs_issue_flush;
fcc->f2fs_issue_flush = NULL;
kthread_stop(flush_thread);
}
if (free) {
kfree(fcc);
SM_I(sbi)->fcc_info = NULL;
}
}
int f2fs_flush_device_cache(struct f2fs_sb_info *sbi)
{
int ret = 0, i;
if (!f2fs_is_multi_device(sbi))
return 0;
if (test_opt(sbi, NOBARRIER))
return 0;
for (i = 1; i < sbi->s_ndevs; i++) {
int count = DEFAULT_RETRY_IO_COUNT;
if (!f2fs_test_bit(i, (char *)&sbi->dirty_device))
continue;
do {
ret = __submit_flush_wait(sbi, FDEV(i).bdev);
if (ret)
f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
} while (ret && --count);
if (ret) {
f2fs_stop_checkpoint(sbi, false,
STOP_CP_REASON_FLUSH_FAIL);
break;
}
spin_lock(&sbi->dev_lock);
f2fs_clear_bit(i, (char *)&sbi->dirty_device);
spin_unlock(&sbi->dev_lock);
}
return ret;
}
static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
enum dirty_type dirty_type)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
/* need not be added */
if (IS_CURSEG(sbi, segno))
return;
if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type]))
dirty_i->nr_dirty[dirty_type]++;
if (dirty_type == DIRTY) {
struct seg_entry *sentry = get_seg_entry(sbi, segno);
enum dirty_type t = sentry->type;
if (unlikely(t >= DIRTY)) {
f2fs_bug_on(sbi, 1);
return;
}
if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t]))
dirty_i->nr_dirty[t]++;
if (__is_large_section(sbi)) {
unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
block_t valid_blocks =
get_valid_blocks(sbi, segno, true);
f2fs_bug_on(sbi,
(!is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
!valid_blocks) ||
valid_blocks == CAP_BLKS_PER_SEC(sbi));
if (!IS_CURSEC(sbi, secno))
set_bit(secno, dirty_i->dirty_secmap);
}
}
}
static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
enum dirty_type dirty_type)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
block_t valid_blocks;
if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
dirty_i->nr_dirty[dirty_type]--;
if (dirty_type == DIRTY) {
struct seg_entry *sentry = get_seg_entry(sbi, segno);
enum dirty_type t = sentry->type;
if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
dirty_i->nr_dirty[t]--;
valid_blocks = get_valid_blocks(sbi, segno, true);
if (valid_blocks == 0) {
clear_bit(GET_SEC_FROM_SEG(sbi, segno),
dirty_i->victim_secmap);
#ifdef CONFIG_F2FS_CHECK_FS
clear_bit(segno, SIT_I(sbi)->invalid_segmap);
#endif
}
if (__is_large_section(sbi)) {
unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
if (!valid_blocks ||
valid_blocks == CAP_BLKS_PER_SEC(sbi)) {
clear_bit(secno, dirty_i->dirty_secmap);
return;
}
if (!IS_CURSEC(sbi, secno))
set_bit(secno, dirty_i->dirty_secmap);
}
}
}
/*
* Should not occur error such as -ENOMEM.
* Adding dirty entry into seglist is not critical operation.
* If a given segment is one of current working segments, it won't be added.
*/
static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
unsigned short valid_blocks, ckpt_valid_blocks;
unsigned int usable_blocks;
if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
return;
usable_blocks = f2fs_usable_blks_in_seg(sbi, segno);
mutex_lock(&dirty_i->seglist_lock);
valid_blocks = get_valid_blocks(sbi, segno, false);
ckpt_valid_blocks = get_ckpt_valid_blocks(sbi, segno, false);
if (valid_blocks == 0 && (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) ||
ckpt_valid_blocks == usable_blocks)) {
__locate_dirty_segment(sbi, segno, PRE);
__remove_dirty_segment(sbi, segno, DIRTY);
} else if (valid_blocks < usable_blocks) {
__locate_dirty_segment(sbi, segno, DIRTY);
} else {
/* Recovery routine with SSR needs this */
__remove_dirty_segment(sbi, segno, DIRTY);
}
mutex_unlock(&dirty_i->seglist_lock);
}
/* This moves currently empty dirty blocks to prefree. Must hold seglist_lock */
void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
unsigned int segno;
mutex_lock(&dirty_i->seglist_lock);
for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
if (get_valid_blocks(sbi, segno, false))
continue;
if (IS_CURSEG(sbi, segno))
continue;
__locate_dirty_segment(sbi, segno, PRE);
__remove_dirty_segment(sbi, segno, DIRTY);
}
mutex_unlock(&dirty_i->seglist_lock);
}
block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi)
{
int ovp_hole_segs =
(overprovision_segments(sbi) - reserved_segments(sbi));
block_t ovp_holes = SEGS_TO_BLKS(sbi, ovp_hole_segs);
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
block_t holes[2] = {0, 0}; /* DATA and NODE */
block_t unusable;
struct seg_entry *se;
unsigned int segno;
mutex_lock(&dirty_i->seglist_lock);
for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
se = get_seg_entry(sbi, segno);
if (IS_NODESEG(se->type))
holes[NODE] += f2fs_usable_blks_in_seg(sbi, segno) -
se->valid_blocks;
else
holes[DATA] += f2fs_usable_blks_in_seg(sbi, segno) -
se->valid_blocks;
}
mutex_unlock(&dirty_i->seglist_lock);
unusable = max(holes[DATA], holes[NODE]);
if (unusable > ovp_holes)
return unusable - ovp_holes;
return 0;
}
int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable)
{
int ovp_hole_segs =
(overprovision_segments(sbi) - reserved_segments(sbi));
if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
return 0;
if (unusable > F2FS_OPTION(sbi).unusable_cap)
return -EAGAIN;
if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) &&
dirty_segments(sbi) > ovp_hole_segs)
return -EAGAIN;
if (has_not_enough_free_secs(sbi, 0, 0))
return -EAGAIN;
return 0;
}
/* This is only used by SBI_CP_DISABLED */
static unsigned int get_free_segment(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
unsigned int segno = 0;
mutex_lock(&dirty_i->seglist_lock);
for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
if (get_valid_blocks(sbi, segno, false))
continue;
if (get_ckpt_valid_blocks(sbi, segno, false))
continue;
mutex_unlock(&dirty_i->seglist_lock);
return segno;
}
mutex_unlock(&dirty_i->seglist_lock);
return NULL_SEGNO;
}
static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t lstart,
block_t start, block_t len)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct list_head *pend_list;
struct discard_cmd *dc;
f2fs_bug_on(sbi, !len);
pend_list = &dcc->pend_list[plist_idx(len)];
dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS, true, NULL);
INIT_LIST_HEAD(&dc->list);
dc->bdev = bdev;
dc->di.lstart = lstart;
dc->di.start = start;
dc->di.len = len;
dc->ref = 0;
dc->state = D_PREP;
dc->queued = 0;
dc->error = 0;
init_completion(&dc->wait);
list_add_tail(&dc->list, pend_list);
spin_lock_init(&dc->lock);
dc->bio_ref = 0;
atomic_inc(&dcc->discard_cmd_cnt);
dcc->undiscard_blks += len;
return dc;
}
static bool f2fs_check_discard_tree(struct f2fs_sb_info *sbi)
{
#ifdef CONFIG_F2FS_CHECK_FS
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct rb_node *cur = rb_first_cached(&dcc->root), *next;
struct discard_cmd *cur_dc, *next_dc;
while (cur) {
next = rb_next(cur);
if (!next)
return true;
cur_dc = rb_entry(cur, struct discard_cmd, rb_node);
next_dc = rb_entry(next, struct discard_cmd, rb_node);
if (cur_dc->di.lstart + cur_dc->di.len > next_dc->di.lstart) {
f2fs_info(sbi, "broken discard_rbtree, "
"cur(%u, %u) next(%u, %u)",
cur_dc->di.lstart, cur_dc->di.len,
next_dc->di.lstart, next_dc->di.len);
return false;
}
cur = next;
}
#endif
return true;
}
static struct discard_cmd *__lookup_discard_cmd(struct f2fs_sb_info *sbi,
block_t blkaddr)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct rb_node *node = dcc->root.rb_root.rb_node;
struct discard_cmd *dc;
while (node) {
dc = rb_entry(node, struct discard_cmd, rb_node);
if (blkaddr < dc->di.lstart)
node = node->rb_left;
else if (blkaddr >= dc->di.lstart + dc->di.len)
node = node->rb_right;
else
return dc;
}
return NULL;
}
static struct discard_cmd *__lookup_discard_cmd_ret(struct rb_root_cached *root,
block_t blkaddr,
struct discard_cmd **prev_entry,
struct discard_cmd **next_entry,
struct rb_node ***insert_p,
struct rb_node **insert_parent)
{
struct rb_node **pnode = &root->rb_root.rb_node;
struct rb_node *parent = NULL, *tmp_node;
struct discard_cmd *dc;
*insert_p = NULL;
*insert_parent = NULL;
*prev_entry = NULL;
*next_entry = NULL;
if (RB_EMPTY_ROOT(&root->rb_root))
return NULL;
while (*pnode) {
parent = *pnode;
dc = rb_entry(*pnode, struct discard_cmd, rb_node);
if (blkaddr < dc->di.lstart)
pnode = &(*pnode)->rb_left;
else if (blkaddr >= dc->di.lstart + dc->di.len)
pnode = &(*pnode)->rb_right;
else
goto lookup_neighbors;
}
*insert_p = pnode;
*insert_parent = parent;
dc = rb_entry(parent, struct discard_cmd, rb_node);
tmp_node = parent;
if (parent && blkaddr > dc->di.lstart)
tmp_node = rb_next(parent);
*next_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node);
tmp_node = parent;
if (parent && blkaddr < dc->di.lstart)
tmp_node = rb_prev(parent);
*prev_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node);
return NULL;
lookup_neighbors:
/* lookup prev node for merging backward later */
tmp_node = rb_prev(&dc->rb_node);
*prev_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node);
/* lookup next node for merging frontward later */
tmp_node = rb_next(&dc->rb_node);
*next_entry = rb_entry_safe(tmp_node, struct discard_cmd, rb_node);
return dc;
}
static void __detach_discard_cmd(struct discard_cmd_control *dcc,
struct discard_cmd *dc)
{
if (dc->state == D_DONE)
atomic_sub(dc->queued, &dcc->queued_discard);
list_del(&dc->list);
rb_erase_cached(&dc->rb_node, &dcc->root);
dcc->undiscard_blks -= dc->di.len;
kmem_cache_free(discard_cmd_slab, dc);
atomic_dec(&dcc->discard_cmd_cnt);
}
static void __remove_discard_cmd(struct f2fs_sb_info *sbi,
struct discard_cmd *dc)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
unsigned long flags;
trace_f2fs_remove_discard(dc->bdev, dc->di.start, dc->di.len);
spin_lock_irqsave(&dc->lock, flags);
if (dc->bio_ref) {
spin_unlock_irqrestore(&dc->lock, flags);
return;
}
spin_unlock_irqrestore(&dc->lock, flags);
f2fs_bug_on(sbi, dc->ref);
if (dc->error == -EOPNOTSUPP)
dc->error = 0;
if (dc->error)
f2fs_info_ratelimited(sbi,
"Issue discard(%u, %u, %u) failed, ret: %d",
dc->di.lstart, dc->di.start, dc->di.len, dc->error);
__detach_discard_cmd(dcc, dc);
}
static void f2fs_submit_discard_endio(struct bio *bio)
{
struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
unsigned long flags;
spin_lock_irqsave(&dc->lock, flags);
if (!dc->error)
dc->error = blk_status_to_errno(bio->bi_status);
dc->bio_ref--;
if (!dc->bio_ref && dc->state == D_SUBMIT) {
dc->state = D_DONE;
complete_all(&dc->wait);
}
spin_unlock_irqrestore(&dc->lock, flags);
bio_put(bio);
}
static void __check_sit_bitmap(struct f2fs_sb_info *sbi,
block_t start, block_t end)
{
#ifdef CONFIG_F2FS_CHECK_FS
struct seg_entry *sentry;
unsigned int segno;
block_t blk = start;
unsigned long offset, size, *map;
while (blk < end) {
segno = GET_SEGNO(sbi, blk);
sentry = get_seg_entry(sbi, segno);
offset = GET_BLKOFF_FROM_SEG0(sbi, blk);
if (end < START_BLOCK(sbi, segno + 1))
size = GET_BLKOFF_FROM_SEG0(sbi, end);
else
size = BLKS_PER_SEG(sbi);
map = (unsigned long *)(sentry->cur_valid_map);
offset = __find_rev_next_bit(map, size, offset);
f2fs_bug_on(sbi, offset != size);
blk = START_BLOCK(sbi, segno + 1);
}
#endif
}
static void __init_discard_policy(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy,
int discard_type, unsigned int granularity)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
/* common policy */
dpolicy->type = discard_type;
dpolicy->sync = true;
dpolicy->ordered = false;
dpolicy->granularity = granularity;
dpolicy->max_requests = dcc->max_discard_request;
dpolicy->io_aware_gran = dcc->discard_io_aware_gran;
dpolicy->timeout = false;
if (discard_type == DPOLICY_BG) {
dpolicy->min_interval = dcc->min_discard_issue_time;
dpolicy->mid_interval = dcc->mid_discard_issue_time;
dpolicy->max_interval = dcc->max_discard_issue_time;
if (dcc->discard_io_aware == DPOLICY_IO_AWARE_ENABLE)
dpolicy->io_aware = true;
else if (dcc->discard_io_aware == DPOLICY_IO_AWARE_DISABLE)
dpolicy->io_aware = false;
dpolicy->sync = false;
dpolicy->ordered = true;
if (utilization(sbi) > dcc->discard_urgent_util) {
dpolicy->granularity = MIN_DISCARD_GRANULARITY;
if (atomic_read(&dcc->discard_cmd_cnt))
dpolicy->max_interval =
dcc->min_discard_issue_time;
}
} else if (discard_type == DPOLICY_FORCE) {
dpolicy->min_interval = dcc->min_discard_issue_time;
dpolicy->mid_interval = dcc->mid_discard_issue_time;
dpolicy->max_interval = dcc->max_discard_issue_time;
dpolicy->io_aware = false;
} else if (discard_type == DPOLICY_FSTRIM) {
dpolicy->io_aware = false;
} else if (discard_type == DPOLICY_UMOUNT) {
dpolicy->io_aware = false;
/* we need to issue all to keep CP_TRIMMED_FLAG */
dpolicy->granularity = MIN_DISCARD_GRANULARITY;
dpolicy->timeout = true;
}
}
static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t lstart,
block_t start, block_t len);
#ifdef CONFIG_BLK_DEV_ZONED
static void __submit_zone_reset_cmd(struct f2fs_sb_info *sbi,
struct discard_cmd *dc, blk_opf_t flag,
struct list_head *wait_list,
unsigned int *issued)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct block_device *bdev = dc->bdev;
struct bio *bio = bio_alloc(bdev, 0, REQ_OP_ZONE_RESET | flag, GFP_NOFS);
unsigned long flags;
trace_f2fs_issue_reset_zone(bdev, dc->di.start);
spin_lock_irqsave(&dc->lock, flags);
dc->state = D_SUBMIT;
dc->bio_ref++;
spin_unlock_irqrestore(&dc->lock, flags);
if (issued)
(*issued)++;
atomic_inc(&dcc->queued_discard);
dc->queued++;
list_move_tail(&dc->list, wait_list);
/* sanity check on discard range */
__check_sit_bitmap(sbi, dc->di.lstart, dc->di.lstart + dc->di.len);
bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(dc->di.start);
bio->bi_private = dc;
bio->bi_end_io = f2fs_submit_discard_endio;
submit_bio(bio);
atomic_inc(&dcc->issued_discard);
f2fs_update_iostat(sbi, NULL, FS_ZONE_RESET_IO, dc->di.len * F2FS_BLKSIZE);
}
#endif
/* this function is copied from blkdev_issue_discard from block/blk-lib.c */
static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy,
struct discard_cmd *dc, int *issued)
{
struct block_device *bdev = dc->bdev;
unsigned int max_discard_blocks =
SECTOR_TO_BLOCK(bdev_max_discard_sectors(bdev));
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
&(dcc->fstrim_list) : &(dcc->wait_list);
blk_opf_t flag = dpolicy->sync ? REQ_SYNC : 0;
block_t lstart, start, len, total_len;
int err = 0;
if (dc->state != D_PREP)
return 0;
if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
return 0;
#ifdef CONFIG_BLK_DEV_ZONED
if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev)) {
int devi = f2fs_bdev_index(sbi, bdev);
if (devi < 0)
return -EINVAL;
if (f2fs_blkz_is_seq(sbi, devi, dc->di.start)) {
__submit_zone_reset_cmd(sbi, dc, flag,
wait_list, issued);
return 0;
}
}
#endif
trace_f2fs_issue_discard(bdev, dc->di.start, dc->di.len);
lstart = dc->di.lstart;
start = dc->di.start;
len = dc->di.len;
total_len = len;
dc->di.len = 0;
while (total_len && *issued < dpolicy->max_requests && !err) {
struct bio *bio = NULL;
unsigned long flags;
bool last = true;
if (len > max_discard_blocks) {
len = max_discard_blocks;
last = false;
}
(*issued)++;
if (*issued == dpolicy->max_requests)
last = true;
dc->di.len += len;
if (time_to_inject(sbi, FAULT_DISCARD)) {
err = -EIO;
} else {
err = __blkdev_issue_discard(bdev,
SECTOR_FROM_BLOCK(start),
SECTOR_FROM_BLOCK(len),
GFP_NOFS, &bio);
}
if (err) {
spin_lock_irqsave(&dc->lock, flags);
if (dc->state == D_PARTIAL)
dc->state = D_SUBMIT;
spin_unlock_irqrestore(&dc->lock, flags);
break;
}
f2fs_bug_on(sbi, !bio);
/*
* should keep before submission to avoid D_DONE
* right away
*/
spin_lock_irqsave(&dc->lock, flags);
if (last)
dc->state = D_SUBMIT;
else
dc->state = D_PARTIAL;
dc->bio_ref++;
spin_unlock_irqrestore(&dc->lock, flags);
atomic_inc(&dcc->queued_discard);
dc->queued++;
list_move_tail(&dc->list, wait_list);
/* sanity check on discard range */
__check_sit_bitmap(sbi, lstart, lstart + len);
bio->bi_private = dc;
bio->bi_end_io = f2fs_submit_discard_endio;
bio->bi_opf |= flag;
submit_bio(bio);
atomic_inc(&dcc->issued_discard);
f2fs_update_iostat(sbi, NULL, FS_DISCARD_IO, len * F2FS_BLKSIZE);
lstart += len;
start += len;
total_len -= len;
len = total_len;
}
if (!err && len) {
dcc->undiscard_blks -= len;
__update_discard_tree_range(sbi, bdev, lstart, start, len);
}
return err;
}
static void __insert_discard_cmd(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t lstart,
block_t start, block_t len)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct rb_node **p = &dcc->root.rb_root.rb_node;
struct rb_node *parent = NULL;
struct discard_cmd *dc;
bool leftmost = true;
/* look up rb tree to find parent node */
while (*p) {
parent = *p;
dc = rb_entry(parent, struct discard_cmd, rb_node);
if (lstart < dc->di.lstart) {
p = &(*p)->rb_left;
} else if (lstart >= dc->di.lstart + dc->di.len) {
p = &(*p)->rb_right;
leftmost = false;
} else {
/* Let's skip to add, if exists */
return;
}
}
dc = __create_discard_cmd(sbi, bdev, lstart, start, len);
rb_link_node(&dc->rb_node, parent, p);
rb_insert_color_cached(&dc->rb_node, &dcc->root, leftmost);
}
static void __relocate_discard_cmd(struct discard_cmd_control *dcc,
struct discard_cmd *dc)
{
list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->di.len)]);
}
static void __punch_discard_cmd(struct f2fs_sb_info *sbi,
struct discard_cmd *dc, block_t blkaddr)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct discard_info di = dc->di;
bool modified = false;
if (dc->state == D_DONE || dc->di.len == 1) {
__remove_discard_cmd(sbi, dc);
return;
}
dcc->undiscard_blks -= di.len;
if (blkaddr > di.lstart) {
dc->di.len = blkaddr - dc->di.lstart;
dcc->undiscard_blks += dc->di.len;
__relocate_discard_cmd(dcc, dc);
modified = true;
}
if (blkaddr < di.lstart + di.len - 1) {
if (modified) {
__insert_discard_cmd(sbi, dc->bdev, blkaddr + 1,
di.start + blkaddr + 1 - di.lstart,
di.lstart + di.len - 1 - blkaddr);
} else {
dc->di.lstart++;
dc->di.len--;
dc->di.start++;
dcc->undiscard_blks += dc->di.len;
__relocate_discard_cmd(dcc, dc);
}
}
}
static void __update_discard_tree_range(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t lstart,
block_t start, block_t len)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
struct discard_cmd *dc;
struct discard_info di = {0};
struct rb_node **insert_p = NULL, *insert_parent = NULL;
unsigned int max_discard_blocks =
SECTOR_TO_BLOCK(bdev_max_discard_sectors(bdev));
block_t end = lstart + len;
dc = __lookup_discard_cmd_ret(&dcc->root, lstart,
&prev_dc, &next_dc, &insert_p, &insert_parent);
if (dc)
prev_dc = dc;
if (!prev_dc) {
di.lstart = lstart;
di.len = next_dc ? next_dc->di.lstart - lstart : len;
di.len = min(di.len, len);
di.start = start;
}
while (1) {
struct rb_node *node;
bool merged = false;
struct discard_cmd *tdc = NULL;
if (prev_dc) {
di.lstart = prev_dc->di.lstart + prev_dc->di.len;
if (di.lstart < lstart)
di.lstart = lstart;
if (di.lstart >= end)
break;
if (!next_dc || next_dc->di.lstart > end)
di.len = end - di.lstart;
else
di.len = next_dc->di.lstart - di.lstart;
di.start = start + di.lstart - lstart;
}
if (!di.len)
goto next;
if (prev_dc && prev_dc->state == D_PREP &&
prev_dc->bdev == bdev &&
__is_discard_back_mergeable(&di, &prev_dc->di,
max_discard_blocks)) {
prev_dc->di.len += di.len;
dcc->undiscard_blks += di.len;
__relocate_discard_cmd(dcc, prev_dc);
di = prev_dc->di;
tdc = prev_dc;
merged = true;
}
if (next_dc && next_dc->state == D_PREP &&
next_dc->bdev == bdev &&
__is_discard_front_mergeable(&di, &next_dc->di,
max_discard_blocks)) {
next_dc->di.lstart = di.lstart;
next_dc->di.len += di.len;
next_dc->di.start = di.start;
dcc->undiscard_blks += di.len;
__relocate_discard_cmd(dcc, next_dc);
if (tdc)
__remove_discard_cmd(sbi, tdc);
merged = true;
}
if (!merged)
__insert_discard_cmd(sbi, bdev,
di.lstart, di.start, di.len);
next:
prev_dc = next_dc;
if (!prev_dc)
break;
node = rb_next(&prev_dc->rb_node);
next_dc = rb_entry_safe(node, struct discard_cmd, rb_node);
}
}
#ifdef CONFIG_BLK_DEV_ZONED
static void __queue_zone_reset_cmd(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t blkstart, block_t lblkstart,
block_t blklen)
{
trace_f2fs_queue_reset_zone(bdev, blkstart);
mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock);
__insert_discard_cmd(sbi, bdev, lblkstart, blkstart, blklen);
mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock);
}
#endif
static void __queue_discard_cmd(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t blkstart, block_t blklen)
{
block_t lblkstart = blkstart;
if (!f2fs_bdev_support_discard(bdev))
return;
trace_f2fs_queue_discard(bdev, blkstart, blklen);
if (f2fs_is_multi_device(sbi)) {
int devi = f2fs_target_device_index(sbi, blkstart);
blkstart -= FDEV(devi).start_blk;
}
mutex_lock(&SM_I(sbi)->dcc_info->cmd_lock);
__update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen);
mutex_unlock(&SM_I(sbi)->dcc_info->cmd_lock);
}
static void __issue_discard_cmd_orderly(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy, int *issued)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
struct rb_node **insert_p = NULL, *insert_parent = NULL;
struct discard_cmd *dc;
struct blk_plug plug;
bool io_interrupted = false;
mutex_lock(&dcc->cmd_lock);
dc = __lookup_discard_cmd_ret(&dcc->root, dcc->next_pos,
&prev_dc, &next_dc, &insert_p, &insert_parent);
if (!dc)
dc = next_dc;
blk_start_plug(&plug);
while (dc) {
struct rb_node *node;
int err = 0;
if (dc->state != D_PREP)
goto next;
if (dpolicy->io_aware && !is_idle(sbi, DISCARD_TIME)) {
io_interrupted = true;
break;
}
dcc->next_pos = dc->di.lstart + dc->di.len;
err = __submit_discard_cmd(sbi, dpolicy, dc, issued);
if (*issued >= dpolicy->max_requests)
break;
next:
node = rb_next(&dc->rb_node);
if (err)
__remove_discard_cmd(sbi, dc);
dc = rb_entry_safe(node, struct discard_cmd, rb_node);
}
blk_finish_plug(&plug);
if (!dc)
dcc->next_pos = 0;
mutex_unlock(&dcc->cmd_lock);
if (!(*issued) && io_interrupted)
*issued = -1;
}
static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy);
static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct list_head *pend_list;
struct discard_cmd *dc, *tmp;
struct blk_plug plug;
int i, issued;
bool io_interrupted = false;
if (dpolicy->timeout)
f2fs_update_time(sbi, UMOUNT_DISCARD_TIMEOUT);
retry:
issued = 0;
for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
if (dpolicy->timeout &&
f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
break;
if (i + 1 < dpolicy->granularity)
break;
if (i + 1 < dcc->max_ordered_discard && dpolicy->ordered) {
__issue_discard_cmd_orderly(sbi, dpolicy, &issued);
return issued;
}
pend_list = &dcc->pend_list[i];
mutex_lock(&dcc->cmd_lock);
if (list_empty(pend_list))
goto next;
if (unlikely(dcc->rbtree_check))
f2fs_bug_on(sbi, !f2fs_check_discard_tree(sbi));
blk_start_plug(&plug);
list_for_each_entry_safe(dc, tmp, pend_list, list) {
f2fs_bug_on(sbi, dc->state != D_PREP);
if (dpolicy->timeout &&
f2fs_time_over(sbi, UMOUNT_DISCARD_TIMEOUT))
break;
if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
!is_idle(sbi, DISCARD_TIME)) {
io_interrupted = true;
break;
}
__submit_discard_cmd(sbi, dpolicy, dc, &issued);
if (issued >= dpolicy->max_requests)
break;
}
blk_finish_plug(&plug);
next:
mutex_unlock(&dcc->cmd_lock);
if (issued >= dpolicy->max_requests || io_interrupted)
break;
}
if (dpolicy->type == DPOLICY_UMOUNT && issued) {
__wait_all_discard_cmd(sbi, dpolicy);
goto retry;
}
if (!issued && io_interrupted)
issued = -1;
return issued;
}
static bool __drop_discard_cmd(struct f2fs_sb_info *sbi)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct list_head *pend_list;
struct discard_cmd *dc, *tmp;
int i;
bool dropped = false;
mutex_lock(&dcc->cmd_lock);
for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
pend_list = &dcc->pend_list[i];
list_for_each_entry_safe(dc, tmp, pend_list, list) {
f2fs_bug_on(sbi, dc->state != D_PREP);
__remove_discard_cmd(sbi, dc);
dropped = true;
}
}
mutex_unlock(&dcc->cmd_lock);
return dropped;
}
void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi)
{
__drop_discard_cmd(sbi);
}
static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi,
struct discard_cmd *dc)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
unsigned int len = 0;
wait_for_completion_io(&dc->wait);
mutex_lock(&dcc->cmd_lock);
f2fs_bug_on(sbi, dc->state != D_DONE);
dc->ref--;
if (!dc->ref) {
if (!dc->error)
len = dc->di.len;
__remove_discard_cmd(sbi, dc);
}
mutex_unlock(&dcc->cmd_lock);
return len;
}
static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy,
block_t start, block_t end)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ?
&(dcc->fstrim_list) : &(dcc->wait_list);
struct discard_cmd *dc = NULL, *iter, *tmp;
unsigned int trimmed = 0;
next:
dc = NULL;
mutex_lock(&dcc->cmd_lock);
list_for_each_entry_safe(iter, tmp, wait_list, list) {
if (iter->di.lstart + iter->di.len <= start ||
end <= iter->di.lstart)
continue;
if (iter->di.len < dpolicy->granularity)
continue;
if (iter->state == D_DONE && !iter->ref) {
wait_for_completion_io(&iter->wait);
if (!iter->error)
trimmed += iter->di.len;
__remove_discard_cmd(sbi, iter);
} else {
iter->ref++;
dc = iter;
break;
}
}
mutex_unlock(&dcc->cmd_lock);
if (dc) {
trimmed += __wait_one_discard_bio(sbi, dc);
goto next;
}
return trimmed;
}
static unsigned int __wait_all_discard_cmd(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy)
{
struct discard_policy dp;
unsigned int discard_blks;
if (dpolicy)
return __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX);
/* wait all */
__init_discard_policy(sbi, &dp, DPOLICY_FSTRIM, MIN_DISCARD_GRANULARITY);
discard_blks = __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
__init_discard_policy(sbi, &dp, DPOLICY_UMOUNT, MIN_DISCARD_GRANULARITY);
discard_blks += __wait_discard_cmd_range(sbi, &dp, 0, UINT_MAX);
return discard_blks;
}
/* This should be covered by global mutex, &sit_i->sentry_lock */
static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct discard_cmd *dc;
bool need_wait = false;
mutex_lock(&dcc->cmd_lock);
dc = __lookup_discard_cmd(sbi, blkaddr);
#ifdef CONFIG_BLK_DEV_ZONED
if (dc && f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(dc->bdev)) {
int devi = f2fs_bdev_index(sbi, dc->bdev);
if (devi < 0) {
mutex_unlock(&dcc->cmd_lock);
return;
}
if (f2fs_blkz_is_seq(sbi, devi, dc->di.start)) {
/* force submit zone reset */
if (dc->state == D_PREP)
__submit_zone_reset_cmd(sbi, dc, REQ_SYNC,
&dcc->wait_list, NULL);
dc->ref++;
mutex_unlock(&dcc->cmd_lock);
/* wait zone reset */
__wait_one_discard_bio(sbi, dc);
return;
}
}
#endif
if (dc) {
if (dc->state == D_PREP) {
__punch_discard_cmd(sbi, dc, blkaddr);
} else {
dc->ref++;
need_wait = true;
}
}
mutex_unlock(&dcc->cmd_lock);
if (need_wait)
__wait_one_discard_bio(sbi, dc);
}
void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
if (dcc && dcc->f2fs_issue_discard) {
struct task_struct *discard_thread = dcc->f2fs_issue_discard;
dcc->f2fs_issue_discard = NULL;
kthread_stop(discard_thread);
}
}
/**
* f2fs_issue_discard_timeout() - Issue all discard cmd within UMOUNT_DISCARD_TIMEOUT
* @sbi: the f2fs_sb_info data for discard cmd to issue
*
* When UMOUNT_DISCARD_TIMEOUT is exceeded, all remaining discard commands will be dropped
*
* Return true if issued all discard cmd or no discard cmd need issue, otherwise return false.
*/
bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct discard_policy dpolicy;
bool dropped;
if (!atomic_read(&dcc->discard_cmd_cnt))
return true;
__init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT,
dcc->discard_granularity);
__issue_discard_cmd(sbi, &dpolicy);
dropped = __drop_discard_cmd(sbi);
/* just to make sure there is no pending discard commands */
__wait_all_discard_cmd(sbi, NULL);
f2fs_bug_on(sbi, atomic_read(&dcc->discard_cmd_cnt));
return !dropped;
}
static int issue_discard_thread(void *data)
{
struct f2fs_sb_info *sbi = data;
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
wait_queue_head_t *q = &dcc->discard_wait_queue;
struct discard_policy dpolicy;
unsigned int wait_ms = dcc->min_discard_issue_time;
int issued;
set_freezable();
do {
wait_event_freezable_timeout(*q,
kthread_should_stop() || dcc->discard_wake,
msecs_to_jiffies(wait_ms));
if (sbi->gc_mode == GC_URGENT_HIGH ||
!f2fs_available_free_memory(sbi, DISCARD_CACHE))
__init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE,
MIN_DISCARD_GRANULARITY);
else
__init_discard_policy(sbi, &dpolicy, DPOLICY_BG,
dcc->discard_granularity);
if (dcc->discard_wake)
dcc->discard_wake = false;
/* clean up pending candidates before going to sleep */
if (atomic_read(&dcc->queued_discard))
__wait_all_discard_cmd(sbi, NULL);
if (f2fs_readonly(sbi->sb))
continue;
if (kthread_should_stop())
return 0;
if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
!atomic_read(&dcc->discard_cmd_cnt)) {
wait_ms = dpolicy.max_interval;
continue;
}
sb_start_intwrite(sbi->sb);
issued = __issue_discard_cmd(sbi, &dpolicy);
if (issued > 0) {
__wait_all_discard_cmd(sbi, &dpolicy);
wait_ms = dpolicy.min_interval;
} else if (issued == -1) {
wait_ms = f2fs_time_to_wait(sbi, DISCARD_TIME);
if (!wait_ms)
wait_ms = dpolicy.mid_interval;
} else {
wait_ms = dpolicy.max_interval;
}
if (!atomic_read(&dcc->discard_cmd_cnt))
wait_ms = dpolicy.max_interval;
sb_end_intwrite(sbi->sb);
} while (!kthread_should_stop());
return 0;
}
#ifdef CONFIG_BLK_DEV_ZONED
static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t blkstart, block_t blklen)
{
sector_t sector, nr_sects;
block_t lblkstart = blkstart;
int devi = 0;
u64 remainder = 0;
if (f2fs_is_multi_device(sbi)) {
devi = f2fs_target_device_index(sbi, blkstart);
if (blkstart < FDEV(devi).start_blk ||
blkstart > FDEV(devi).end_blk) {
f2fs_err(sbi, "Invalid block %x", blkstart);
return -EIO;
}
blkstart -= FDEV(devi).start_blk;
}
/* For sequential zones, reset the zone write pointer */
if (f2fs_blkz_is_seq(sbi, devi, blkstart)) {
sector = SECTOR_FROM_BLOCK(blkstart);
nr_sects = SECTOR_FROM_BLOCK(blklen);
div64_u64_rem(sector, bdev_zone_sectors(bdev), &remainder);
if (remainder || nr_sects != bdev_zone_sectors(bdev)) {
f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)",
devi, sbi->s_ndevs ? FDEV(devi).path : "",
blkstart, blklen);
return -EIO;
}
if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) {
unsigned int nofs_flags;
int ret;
trace_f2fs_issue_reset_zone(bdev, blkstart);
nofs_flags = memalloc_nofs_save();
ret = blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET,
sector, nr_sects);
memalloc_nofs_restore(nofs_flags);
return ret;
}
__queue_zone_reset_cmd(sbi, bdev, blkstart, lblkstart, blklen);
return 0;
}
/* For conventional zones, use regular discard if supported */
__queue_discard_cmd(sbi, bdev, lblkstart, blklen);
return 0;
}
#endif
static int __issue_discard_async(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t blkstart, block_t blklen)
{
#ifdef CONFIG_BLK_DEV_ZONED
if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev))
return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen);
#endif
__queue_discard_cmd(sbi, bdev, blkstart, blklen);
return 0;
}
static int f2fs_issue_discard(struct f2fs_sb_info *sbi,
block_t blkstart, block_t blklen)
{
sector_t start = blkstart, len = 0;
struct block_device *bdev;
struct seg_entry *se;
unsigned int offset;
block_t i;
int err = 0;
bdev = f2fs_target_device(sbi, blkstart, NULL);
for (i = blkstart; i < blkstart + blklen; i++, len++) {
if (i != start) {
struct block_device *bdev2 =
f2fs_target_device(sbi, i, NULL);
if (bdev2 != bdev) {
err = __issue_discard_async(sbi, bdev,
start, len);
if (err)
return err;
bdev = bdev2;
start = i;
len = 0;
}
}
se = get_seg_entry(sbi, GET_SEGNO(sbi, i));
offset = GET_BLKOFF_FROM_SEG0(sbi, i);
if (f2fs_block_unit_discard(sbi) &&
!f2fs_test_and_set_bit(offset, se->discard_map))
sbi->discard_blks--;
}
if (len)
err = __issue_discard_async(sbi, bdev, start, len);
return err;
}
static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc,
bool check_only)
{
int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
unsigned long *discard_map = (unsigned long *)se->discard_map;
unsigned long *dmap = SIT_I(sbi)->tmp_map;
unsigned int start = 0, end = -1;
bool force = (cpc->reason & CP_DISCARD);
struct discard_entry *de = NULL;
struct list_head *head = &SM_I(sbi)->dcc_info->entry_list;
int i;
if (se->valid_blocks == BLKS_PER_SEG(sbi) ||
!f2fs_hw_support_discard(sbi) ||
!f2fs_block_unit_discard(sbi))
return false;
if (!force) {
if (!f2fs_realtime_discard_enable(sbi) || !se->valid_blocks ||
SM_I(sbi)->dcc_info->nr_discards >=
SM_I(sbi)->dcc_info->max_discards)
return false;
}
/* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */
for (i = 0; i < entries; i++)
dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] :
(cur_map[i] ^ ckpt_map[i]) & ckpt_map[i];
while (force || SM_I(sbi)->dcc_info->nr_discards <=
SM_I(sbi)->dcc_info->max_discards) {
start = __find_rev_next_bit(dmap, BLKS_PER_SEG(sbi), end + 1);
if (start >= BLKS_PER_SEG(sbi))
break;
end = __find_rev_next_zero_bit(dmap,
BLKS_PER_SEG(sbi), start + 1);
if (force && start && end != BLKS_PER_SEG(sbi) &&
(end - start) < cpc->trim_minlen)
continue;
if (check_only)
return true;
if (!de) {
de = f2fs_kmem_cache_alloc(discard_entry_slab,
GFP_F2FS_ZERO, true, NULL);
de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start);
list_add_tail(&de->list, head);
}
for (i = start; i < end; i++)
__set_bit_le(i, (void *)de->discard_map);
SM_I(sbi)->dcc_info->nr_discards += end - start;
}
return false;
}
static void release_discard_addr(struct discard_entry *entry)
{
list_del(&entry->list);
kmem_cache_free(discard_entry_slab, entry);
}
void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi)
{
struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list);
struct discard_entry *entry, *this;
/* drop caches */
list_for_each_entry_safe(entry, this, head, list)
release_discard_addr(entry);
}
/*
* Should call f2fs_clear_prefree_segments after checkpoint is done.
*/
static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
unsigned int segno;
mutex_lock(&dirty_i->seglist_lock);
for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
__set_test_and_free(sbi, segno, false);
mutex_unlock(&dirty_i->seglist_lock);
}
void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
struct cp_control *cpc)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct list_head *head = &dcc->entry_list;
struct discard_entry *entry, *this;
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
unsigned long *prefree_map = dirty_i->dirty_segmap[PRE];
unsigned int start = 0, end = -1;
unsigned int secno, start_segno;
bool force = (cpc->reason & CP_DISCARD);
bool section_alignment = F2FS_OPTION(sbi).discard_unit ==
DISCARD_UNIT_SECTION;
if (f2fs_lfs_mode(sbi) && __is_large_section(sbi))
section_alignment = true;
mutex_lock(&dirty_i->seglist_lock);
while (1) {
int i;
if (section_alignment && end != -1)
end--;
start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1);
if (start >= MAIN_SEGS(sbi))
break;
end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi),
start + 1);
if (section_alignment) {
start = rounddown(start, SEGS_PER_SEC(sbi));
end = roundup(end, SEGS_PER_SEC(sbi));
}
for (i = start; i < end; i++) {
if (test_and_clear_bit(i, prefree_map))
dirty_i->nr_dirty[PRE]--;
}
if (!f2fs_realtime_discard_enable(sbi))
continue;
if (force && start >= cpc->trim_start &&
(end - 1) <= cpc->trim_end)
continue;
/* Should cover 2MB zoned device for zone-based reset */
if (!f2fs_sb_has_blkzoned(sbi) &&
(!f2fs_lfs_mode(sbi) || !__is_large_section(sbi))) {
f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
SEGS_TO_BLKS(sbi, end - start));
continue;
}
next:
secno = GET_SEC_FROM_SEG(sbi, start);
start_segno = GET_SEG_FROM_SEC(sbi, secno);
if (!IS_CURSEC(sbi, secno) &&
!get_valid_blocks(sbi, start, true))
f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno),
BLKS_PER_SEC(sbi));
start = start_segno + SEGS_PER_SEC(sbi);
if (start < end)
goto next;
else
end = start - 1;
}
mutex_unlock(&dirty_i->seglist_lock);
if (!f2fs_block_unit_discard(sbi))
goto wakeup;
/* send small discards */
list_for_each_entry_safe(entry, this, head, list) {
unsigned int cur_pos = 0, next_pos, len, total_len = 0;
bool is_valid = test_bit_le(0, entry->discard_map);
find_next:
if (is_valid) {
next_pos = find_next_zero_bit_le(entry->discard_map,
BLKS_PER_SEG(sbi), cur_pos);
len = next_pos - cur_pos;
if (f2fs_sb_has_blkzoned(sbi) ||
(force && len < cpc->trim_minlen))
goto skip;
f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos,
len);
total_len += len;
} else {
next_pos = find_next_bit_le(entry->discard_map,
BLKS_PER_SEG(sbi), cur_pos);
}
skip:
cur_pos = next_pos;
is_valid = !is_valid;
if (cur_pos < BLKS_PER_SEG(sbi))
goto find_next;
release_discard_addr(entry);
dcc->nr_discards -= total_len;
}
wakeup:
wake_up_discard_thread(sbi, false);
}
int f2fs_start_discard_thread(struct f2fs_sb_info *sbi)
{
dev_t dev = sbi->sb->s_bdev->bd_dev;
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
int err = 0;
if (f2fs_sb_has_readonly(sbi)) {
f2fs_info(sbi,
"Skip to start discard thread for readonly image");
return 0;
}
if (!f2fs_realtime_discard_enable(sbi))
return 0;
dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
"f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(dcc->f2fs_issue_discard)) {
err = PTR_ERR(dcc->f2fs_issue_discard);
dcc->f2fs_issue_discard = NULL;
}
return err;
}
static int create_discard_cmd_control(struct f2fs_sb_info *sbi)
{
struct discard_cmd_control *dcc;
int err = 0, i;
if (SM_I(sbi)->dcc_info) {
dcc = SM_I(sbi)->dcc_info;
goto init_thread;
}
dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL);
if (!dcc)
return -ENOMEM;
dcc->discard_io_aware_gran = MAX_PLIST_NUM;
dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY;
dcc->max_ordered_discard = DEFAULT_MAX_ORDERED_DISCARD_GRANULARITY;
dcc->discard_io_aware = DPOLICY_IO_AWARE_ENABLE;
if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
dcc->discard_granularity = BLKS_PER_SEG(sbi);
else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
dcc->discard_granularity = BLKS_PER_SEC(sbi);
INIT_LIST_HEAD(&dcc->entry_list);
for (i = 0; i < MAX_PLIST_NUM; i++)
INIT_LIST_HEAD(&dcc->pend_list[i]);
INIT_LIST_HEAD(&dcc->wait_list);
INIT_LIST_HEAD(&dcc->fstrim_list);
mutex_init(&dcc->cmd_lock);
atomic_set(&dcc->issued_discard, 0);
atomic_set(&dcc->queued_discard, 0);
atomic_set(&dcc->discard_cmd_cnt, 0);
dcc->nr_discards = 0;
dcc->max_discards = SEGS_TO_BLKS(sbi, MAIN_SEGS(sbi));
dcc->max_discard_request = DEF_MAX_DISCARD_REQUEST;
dcc->min_discard_issue_time = DEF_MIN_DISCARD_ISSUE_TIME;
dcc->mid_discard_issue_time = DEF_MID_DISCARD_ISSUE_TIME;
dcc->max_discard_issue_time = DEF_MAX_DISCARD_ISSUE_TIME;
dcc->discard_urgent_util = DEF_DISCARD_URGENT_UTIL;
dcc->undiscard_blks = 0;
dcc->next_pos = 0;
dcc->root = RB_ROOT_CACHED;
dcc->rbtree_check = false;
init_waitqueue_head(&dcc->discard_wait_queue);
SM_I(sbi)->dcc_info = dcc;
init_thread:
err = f2fs_start_discard_thread(sbi);
if (err) {
kfree(dcc);
SM_I(sbi)->dcc_info = NULL;
}
return err;
}
static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
if (!dcc)
return;
f2fs_stop_discard_thread(sbi);
/*
* Recovery can cache discard commands, so in error path of
* fill_super(), it needs to give a chance to handle them.
*/
f2fs_issue_discard_timeout(sbi);
kfree(dcc);
SM_I(sbi)->dcc_info = NULL;
}
static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno)
{
struct sit_info *sit_i = SIT_I(sbi);
if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) {
sit_i->dirty_sentries++;
return false;
}
return true;
}
static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type,
unsigned int segno, int modified)
{
struct seg_entry *se = get_seg_entry(sbi, segno);
se->type = type;
if (modified)
__mark_sit_entry_dirty(sbi, segno);
}
static inline unsigned long long get_segment_mtime(struct f2fs_sb_info *sbi,
block_t blkaddr)
{
unsigned int segno = GET_SEGNO(sbi, blkaddr);
if (segno == NULL_SEGNO)
return 0;
return get_seg_entry(sbi, segno)->mtime;
}
static void update_segment_mtime(struct f2fs_sb_info *sbi, block_t blkaddr,
unsigned long long old_mtime)
{
struct seg_entry *se;
unsigned int segno = GET_SEGNO(sbi, blkaddr);
unsigned long long ctime = get_mtime(sbi, false);
unsigned long long mtime = old_mtime ? old_mtime : ctime;
if (segno == NULL_SEGNO)
return;
se = get_seg_entry(sbi, segno);
if (!se->mtime)
se->mtime = mtime;
else
se->mtime = div_u64(se->mtime * se->valid_blocks + mtime,
se->valid_blocks + 1);
if (ctime > SIT_I(sbi)->max_mtime)
SIT_I(sbi)->max_mtime = ctime;
}
static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
{
struct seg_entry *se;
unsigned int segno, offset;
long int new_vblocks;
bool exist;
#ifdef CONFIG_F2FS_CHECK_FS
bool mir_exist;
#endif
segno = GET_SEGNO(sbi, blkaddr);
if (segno == NULL_SEGNO)
return;
se = get_seg_entry(sbi, segno);
new_vblocks = se->valid_blocks + del;
offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
f2fs_bug_on(sbi, (new_vblocks < 0 ||
(new_vblocks > f2fs_usable_blks_in_seg(sbi, segno))));
se->valid_blocks = new_vblocks;
/* Update valid block bitmap */
if (del > 0) {
exist = f2fs_test_and_set_bit(offset, se->cur_valid_map);
#ifdef CONFIG_F2FS_CHECK_FS
mir_exist = f2fs_test_and_set_bit(offset,
se->cur_valid_map_mir);
if (unlikely(exist != mir_exist)) {
f2fs_err(sbi, "Inconsistent error when setting bitmap, blk:%u, old bit:%d",
blkaddr, exist);
f2fs_bug_on(sbi, 1);
}
#endif
if (unlikely(exist)) {
f2fs_err(sbi, "Bitmap was wrongly set, blk:%u",
blkaddr);
f2fs_bug_on(sbi, 1);
se->valid_blocks--;
del = 0;
}
if (f2fs_block_unit_discard(sbi) &&
!f2fs_test_and_set_bit(offset, se->discard_map))
sbi->discard_blks--;
/*
* SSR should never reuse block which is checkpointed
* or newly invalidated.
*/
if (!is_sbi_flag_set(sbi, SBI_CP_DISABLED)) {
if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map))
se->ckpt_valid_blocks++;
}
} else {
exist = f2fs_test_and_clear_bit(offset, se->cur_valid_map);
#ifdef CONFIG_F2FS_CHECK_FS
mir_exist = f2fs_test_and_clear_bit(offset,
se->cur_valid_map_mir);
if (unlikely(exist != mir_exist)) {
f2fs_err(sbi, "Inconsistent error when clearing bitmap, blk:%u, old bit:%d",
blkaddr, exist);
f2fs_bug_on(sbi, 1);
}
#endif
if (unlikely(!exist)) {
f2fs_err(sbi, "Bitmap was wrongly cleared, blk:%u",
blkaddr);
f2fs_bug_on(sbi, 1);
se->valid_blocks++;
del = 0;
} else if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
/*
* If checkpoints are off, we must not reuse data that
* was used in the previous checkpoint. If it was used
* before, we must track that to know how much space we
* really have.
*/
if (f2fs_test_bit(offset, se->ckpt_valid_map)) {
spin_lock(&sbi->stat_lock);
sbi->unusable_block_count++;
spin_unlock(&sbi->stat_lock);
}
}
if (f2fs_block_unit_discard(sbi) &&
f2fs_test_and_clear_bit(offset, se->discard_map))
sbi->discard_blks++;
}
if (!f2fs_test_bit(offset, se->ckpt_valid_map))
se->ckpt_valid_blocks += del;
__mark_sit_entry_dirty(sbi, segno);
/* update total number of valid blocks to be written in ckpt area */
SIT_I(sbi)->written_valid_blocks += del;
if (__is_large_section(sbi))
get_sec_entry(sbi, segno)->valid_blocks += del;
}
void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
{
unsigned int segno = GET_SEGNO(sbi, addr);
struct sit_info *sit_i = SIT_I(sbi);
f2fs_bug_on(sbi, addr == NULL_ADDR);
if (addr == NEW_ADDR || addr == COMPRESS_ADDR)
return;
f2fs_invalidate_internal_cache(sbi, addr);
/* add it into sit main buffer */
down_write(&sit_i->sentry_lock);
update_segment_mtime(sbi, addr, 0);
update_sit_entry(sbi, addr, -1);
/* add it into dirty seglist */
locate_dirty_segment(sbi, segno);
up_write(&sit_i->sentry_lock);
}
bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
{
struct sit_info *sit_i = SIT_I(sbi);
unsigned int segno, offset;
struct seg_entry *se;
bool is_cp = false;
if (!__is_valid_data_blkaddr(blkaddr))
return true;
down_read(&sit_i->sentry_lock);
segno = GET_SEGNO(sbi, blkaddr);
se = get_seg_entry(sbi, segno);
offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
if (f2fs_test_bit(offset, se->ckpt_valid_map))
is_cp = true;
up_read(&sit_i->sentry_lock);
return is_cp;
}
static unsigned short f2fs_curseg_valid_blocks(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
if (sbi->ckpt->alloc_type[type] == SSR)
return BLKS_PER_SEG(sbi);
return curseg->next_blkoff;
}
/*
* Calculate the number of current summary pages for writing
*/
int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
{
int valid_sum_count = 0;
int i, sum_in_page;
for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
if (sbi->ckpt->alloc_type[i] != SSR && for_ra)
valid_sum_count +=
le16_to_cpu(F2FS_CKPT(sbi)->cur_data_blkoff[i]);
else
valid_sum_count += f2fs_curseg_valid_blocks(sbi, i);
}
sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
SUM_FOOTER_SIZE) / SUMMARY_SIZE;
if (valid_sum_count <= sum_in_page)
return 1;
else if ((valid_sum_count - sum_in_page) <=
(PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
return 2;
return 3;
}
/*
* Caller should put this summary page
*/
struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
{
if (unlikely(f2fs_cp_error(sbi)))
return ERR_PTR(-EIO);
return f2fs_get_meta_page_retry(sbi, GET_SUM_BLOCK(sbi, segno));
}
void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
void *src, block_t blk_addr)
{
struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
memcpy(page_address(page), src, PAGE_SIZE);
set_page_dirty(page);
f2fs_put_page(page, 1);
}
static void write_sum_page(struct f2fs_sb_info *sbi,
struct f2fs_summary_block *sum_blk, block_t blk_addr)
{
f2fs_update_meta_page(sbi, (void *)sum_blk, blk_addr);
}
static void write_current_sum_page(struct f2fs_sb_info *sbi,
int type, block_t blk_addr)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
struct f2fs_summary_block *src = curseg->sum_blk;
struct f2fs_summary_block *dst;
dst = (struct f2fs_summary_block *)page_address(page);
memset(dst, 0, PAGE_SIZE);
mutex_lock(&curseg->curseg_mutex);
down_read(&curseg->journal_rwsem);
memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
up_read(&curseg->journal_rwsem);
memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
mutex_unlock(&curseg->curseg_mutex);
set_page_dirty(page);
f2fs_put_page(page, 1);
}
static int is_next_segment_free(struct f2fs_sb_info *sbi,
struct curseg_info *curseg)
{
unsigned int segno = curseg->segno + 1;
struct free_segmap_info *free_i = FREE_I(sbi);
if (segno < MAIN_SEGS(sbi) && segno % SEGS_PER_SEC(sbi))
return !test_bit(segno, free_i->free_segmap);
return 0;
}
/*
* Find a new segment from the free segments bitmap to right order
* This function should be returned with success, otherwise BUG
*/
static int get_new_segment(struct f2fs_sb_info *sbi,
unsigned int *newseg, bool new_sec, bool pinning)
{
struct free_segmap_info *free_i = FREE_I(sbi);
unsigned int segno, secno, zoneno;
unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone;
unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg);
unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg);
bool init = true;
int i;
int ret = 0;
spin_lock(&free_i->segmap_lock);
if (time_to_inject(sbi, FAULT_NO_SEGMENT)) {
ret = -ENOSPC;
goto out_unlock;
}
if (!new_sec && ((*newseg + 1) % SEGS_PER_SEC(sbi))) {
segno = find_next_zero_bit(free_i->free_segmap,
GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);
if (segno < GET_SEG_FROM_SEC(sbi, hint + 1))
goto got_it;
}
/*
* If we format f2fs on zoned storage, let's try to get pinned sections
* from beginning of the storage, which should be a conventional one.
*/
if (f2fs_sb_has_blkzoned(sbi)) {
segno = pinning ? 0 : max(first_zoned_segno(sbi), *newseg);
hint = GET_SEC_FROM_SEG(sbi, segno);
}
find_other_zone:
secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint);
if (secno >= MAIN_SECS(sbi)) {
secno = find_first_zero_bit(free_i->free_secmap,
MAIN_SECS(sbi));
if (secno >= MAIN_SECS(sbi)) {
ret = -ENOSPC;
goto out_unlock;
}
}
segno = GET_SEG_FROM_SEC(sbi, secno);
zoneno = GET_ZONE_FROM_SEC(sbi, secno);
/* give up on finding another zone */
if (!init)
goto got_it;
if (sbi->secs_per_zone == 1)
goto got_it;
if (zoneno == old_zoneno)
goto got_it;
for (i = 0; i < NR_CURSEG_TYPE; i++)
if (CURSEG_I(sbi, i)->zone == zoneno)
break;
if (i < NR_CURSEG_TYPE) {
/* zone is in user, try another */
if (zoneno + 1 >= total_zones)
hint = 0;
else
hint = (zoneno + 1) * sbi->secs_per_zone;
init = false;
goto find_other_zone;
}
got_it:
/* set it as dirty segment in free segmap */
f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap));
/* no free section in conventional zone */
if (new_sec && pinning &&
!f2fs_valid_pinned_area(sbi, START_BLOCK(sbi, segno))) {
ret = -EAGAIN;
goto out_unlock;
}
__set_inuse(sbi, segno);
*newseg = segno;
out_unlock:
spin_unlock(&free_i->segmap_lock);
if (ret == -ENOSPC) {
f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_NO_SEGMENT);
f2fs_bug_on(sbi, 1);
}
return ret;
}
static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
struct summary_footer *sum_footer;
unsigned short seg_type = curseg->seg_type;
/* only happen when get_new_segment() fails */
if (curseg->next_segno == NULL_SEGNO)
return;
curseg->inited = true;
curseg->segno = curseg->next_segno;
curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
curseg->next_blkoff = 0;
curseg->next_segno = NULL_SEGNO;
sum_footer = &(curseg->sum_blk->footer);
memset(sum_footer, 0, sizeof(struct summary_footer));
sanity_check_seg_type(sbi, seg_type);
if (IS_DATASEG(seg_type))
SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
if (IS_NODESEG(seg_type))
SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
__set_sit_entry_type(sbi, seg_type, curseg->segno, modified);
}
static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
unsigned short seg_type = curseg->seg_type;
sanity_check_seg_type(sbi, seg_type);
if (__is_large_section(sbi)) {
if (f2fs_need_rand_seg(sbi)) {
unsigned int hint = GET_SEC_FROM_SEG(sbi, curseg->segno);
if (GET_SEC_FROM_SEG(sbi, curseg->segno + 1) != hint)
return curseg->segno;
return get_random_u32_inclusive(curseg->segno + 1,
GET_SEG_FROM_SEC(sbi, hint + 1) - 1);
}
return curseg->segno;
} else if (f2fs_need_rand_seg(sbi)) {
return get_random_u32_below(MAIN_SECS(sbi) * SEGS_PER_SEC(sbi));
}
/* inmem log may not locate on any segment after mount */
if (!curseg->inited)
return 0;
if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
return 0;
if (seg_type == CURSEG_HOT_DATA || IS_NODESEG(seg_type))
return 0;
if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
return SIT_I(sbi)->last_victim[ALLOC_NEXT];
/* find segments from 0 to reuse freed segments */
if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
return 0;
return curseg->segno;
}
/*
* Allocate a current working segment.
* This function always allocates a free segment in LFS manner.
*/
static int new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
unsigned int segno = curseg->segno;
bool pinning = type == CURSEG_COLD_DATA_PINNED;
int ret;
if (curseg->inited)
write_sum_page(sbi, curseg->sum_blk, GET_SUM_BLOCK(sbi, segno));
segno = __get_next_segno(sbi, type);
ret = get_new_segment(sbi, &segno, new_sec, pinning);
if (ret) {
if (ret == -ENOSPC)
curseg->segno = NULL_SEGNO;
return ret;
}
curseg->next_segno = segno;
reset_curseg(sbi, type, 1);
curseg->alloc_type = LFS;
if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
curseg->fragment_remained_chunk =
get_random_u32_inclusive(1, sbi->max_fragment_chunk);
return 0;
}
static int __next_free_blkoff(struct f2fs_sb_info *sbi,
int segno, block_t start)
{
struct seg_entry *se = get_seg_entry(sbi, segno);
int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
unsigned long *target_map = SIT_I(sbi)->tmp_map;
unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map;
unsigned long *cur_map = (unsigned long *)se->cur_valid_map;
int i;
for (i = 0; i < entries; i++)
target_map[i] = ckpt_map[i] | cur_map[i];
return __find_rev_next_zero_bit(target_map, BLKS_PER_SEG(sbi), start);
}
static int f2fs_find_next_ssr_block(struct f2fs_sb_info *sbi,
struct curseg_info *seg)
{
return __next_free_blkoff(sbi, seg->segno, seg->next_blkoff + 1);
}
bool f2fs_segment_has_free_slot(struct f2fs_sb_info *sbi, int segno)
{
return __next_free_blkoff(sbi, segno, 0) < BLKS_PER_SEG(sbi);
}
/*
* This function always allocates a used segment(from dirty seglist) by SSR
* manner, so it should recover the existing segment information of valid blocks
*/
static int change_curseg(struct f2fs_sb_info *sbi, int type)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, type);
unsigned int new_segno = curseg->next_segno;
struct f2fs_summary_block *sum_node;
struct page *sum_page;
write_sum_page(sbi, curseg->sum_blk, GET_SUM_BLOCK(sbi, curseg->segno));
__set_test_and_inuse(sbi, new_segno);
mutex_lock(&dirty_i->seglist_lock);
__remove_dirty_segment(sbi, new_segno, PRE);
__remove_dirty_segment(sbi, new_segno, DIRTY);
mutex_unlock(&dirty_i->seglist_lock);
reset_curseg(sbi, type, 1);
curseg->alloc_type = SSR;
curseg->next_blkoff = __next_free_blkoff(sbi, curseg->segno, 0);
sum_page = f2fs_get_sum_page(sbi, new_segno);
if (IS_ERR(sum_page)) {
/* GC won't be able to use stale summary pages by cp_error */
memset(curseg->sum_blk, 0, SUM_ENTRY_SIZE);
return PTR_ERR(sum_page);
}
sum_node = (struct f2fs_summary_block *)page_address(sum_page);
memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
f2fs_put_page(sum_page, 1);
return 0;
}
static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
int alloc_mode, unsigned long long age);
static int get_atssr_segment(struct f2fs_sb_info *sbi, int type,
int target_type, int alloc_mode,
unsigned long long age)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
int ret = 0;
curseg->seg_type = target_type;
if (get_ssr_segment(sbi, type, alloc_mode, age)) {
struct seg_entry *se = get_seg_entry(sbi, curseg->next_segno);
curseg->seg_type = se->type;
ret = change_curseg(sbi, type);
} else {
/* allocate cold segment by default */
curseg->seg_type = CURSEG_COLD_DATA;
ret = new_curseg(sbi, type, true);
}
stat_inc_seg_type(sbi, curseg);
return ret;
}
static int __f2fs_init_atgc_curseg(struct f2fs_sb_info *sbi, bool force)
{
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC);
int ret = 0;
if (!sbi->am.atgc_enabled && !force)
return 0;
f2fs_down_read(&SM_I(sbi)->curseg_lock);
mutex_lock(&curseg->curseg_mutex);
down_write(&SIT_I(sbi)->sentry_lock);
ret = get_atssr_segment(sbi, CURSEG_ALL_DATA_ATGC,
CURSEG_COLD_DATA, SSR, 0);
up_write(&SIT_I(sbi)->sentry_lock);
mutex_unlock(&curseg->curseg_mutex);
f2fs_up_read(&SM_I(sbi)->curseg_lock);
return ret;
}
int f2fs_init_inmem_curseg(struct f2fs_sb_info *sbi)
{
return __f2fs_init_atgc_curseg(sbi, false);
}
int f2fs_reinit_atgc_curseg(struct f2fs_sb_info *sbi)
{
int ret;
if (!test_opt(sbi, ATGC))
return 0;
if (sbi->am.atgc_enabled)
return 0;
if (le64_to_cpu(F2FS_CKPT(sbi)->elapsed_time) <
sbi->am.age_threshold)
return 0;
ret = __f2fs_init_atgc_curseg(sbi, true);
if (!ret) {
sbi->am.atgc_enabled = true;
f2fs_info(sbi, "reenabled age threshold GC");
}
return ret;
}
static void __f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
mutex_lock(&curseg->curseg_mutex);
if (!curseg->inited)
goto out;
if (get_valid_blocks(sbi, curseg->segno, false)) {
write_sum_page(sbi, curseg->sum_blk,
GET_SUM_BLOCK(sbi, curseg->segno));
} else {
mutex_lock(&DIRTY_I(sbi)->seglist_lock);
__set_test_and_free(sbi, curseg->segno, true);
mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
}
out:
mutex_unlock(&curseg->curseg_mutex);
}
void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi)
{
__f2fs_save_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
if (sbi->am.atgc_enabled)
__f2fs_save_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC);
}
static void __f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
mutex_lock(&curseg->curseg_mutex);
if (!curseg->inited)
goto out;
if (get_valid_blocks(sbi, curseg->segno, false))
goto out;
mutex_lock(&DIRTY_I(sbi)->seglist_lock);
__set_test_and_inuse(sbi, curseg->segno);
mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
out:
mutex_unlock(&curseg->curseg_mutex);
}
void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi)
{
__f2fs_restore_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
if (sbi->am.atgc_enabled)
__f2fs_restore_inmem_curseg(sbi, CURSEG_ALL_DATA_ATGC);
}
static int get_ssr_segment(struct f2fs_sb_info *sbi, int type,
int alloc_mode, unsigned long long age)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
unsigned segno = NULL_SEGNO;
unsigned short seg_type = curseg->seg_type;
int i, cnt;
bool reversed = false;
sanity_check_seg_type(sbi, seg_type);
/* f2fs_need_SSR() already forces to do this */
if (!f2fs_get_victim(sbi, &segno, BG_GC, seg_type, alloc_mode, age)) {
curseg->next_segno = segno;
return 1;
}
/* For node segments, let's do SSR more intensively */
if (IS_NODESEG(seg_type)) {
if (seg_type >= CURSEG_WARM_NODE) {
reversed = true;
i = CURSEG_COLD_NODE;
} else {
i = CURSEG_HOT_NODE;
}
cnt = NR_CURSEG_NODE_TYPE;
} else {
if (seg_type >= CURSEG_WARM_DATA) {
reversed = true;
i = CURSEG_COLD_DATA;
} else {
i = CURSEG_HOT_DATA;
}
cnt = NR_CURSEG_DATA_TYPE;
}
for (; cnt-- > 0; reversed ? i-- : i++) {
if (i == seg_type)
continue;
if (!f2fs_get_victim(sbi, &segno, BG_GC, i, alloc_mode, age)) {
curseg->next_segno = segno;
return 1;
}
}
/* find valid_blocks=0 in dirty list */
if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
segno = get_free_segment(sbi);
if (segno != NULL_SEGNO) {
curseg->next_segno = segno;
return 1;
}
}
return 0;
}
static bool need_new_seg(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) &&
curseg->seg_type == CURSEG_WARM_NODE)
return true;
if (curseg->alloc_type == LFS && is_next_segment_free(sbi, curseg) &&
likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
return true;
if (!f2fs_need_SSR(sbi) || !get_ssr_segment(sbi, type, SSR, 0))
return true;
return false;
}
int f2fs_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;
int ret = 0;
f2fs_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, SSR, 0))
ret = change_curseg(sbi, type);
else
ret = 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_notice(sbi, "For resize: curseg of type %d: %u ==> %u",
type, segno, curseg->segno);
mutex_unlock(&curseg->curseg_mutex);
f2fs_up_read(&SM_I(sbi)->curseg_lock);
return ret;
}
static int __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
bool new_sec, bool force)
{
struct curseg_info *curseg = CURSEG_I(sbi, type);
unsigned int old_segno;
int err = 0;
if (type == CURSEG_COLD_DATA_PINNED && !curseg->inited)
goto allocate;
if (!force && curseg->inited &&
!curseg->next_blkoff &&
!get_valid_blocks(sbi, curseg->segno, new_sec) &&
!get_ckpt_valid_blocks(sbi, curseg->segno, new_sec))
return 0;
allocate:
old_segno = curseg->segno;
err = new_curseg(sbi, type, true);
if (err)
return err;
stat_inc_seg_type(sbi, curseg);
locate_dirty_segment(sbi, old_segno);
return 0;
}
int f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force)
{
int ret;
f2fs_down_read(&SM_I(sbi)->curseg_lock);
down_write(&SIT_I(sbi)->sentry_lock);
ret = __allocate_new_segment(sbi, type, true, force);
up_write(&SIT_I(sbi)->sentry_lock);
f2fs_up_read(&SM_I(sbi)->curseg_lock);
return ret;
}
int f2fs_allocate_pinning_section(struct f2fs_sb_info *sbi)
{
int err;
bool gc_required = true;
retry:
f2fs_lock_op(sbi);
err = f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false);
f2fs_unlock_op(sbi);
if (f2fs_sb_has_blkzoned(sbi) && err == -EAGAIN && gc_required) {
f2fs_down_write(&sbi->gc_lock);
err = f2fs_gc_range(sbi, 0, GET_SEGNO(sbi, FDEV(0).end_blk), true, 1);
f2fs_up_write(&sbi->gc_lock);
gc_required = false;
if (!err)
goto retry;
}
return err;
}
int f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
{
int i;
int err = 0;
f2fs_down_read(&SM_I(sbi)->curseg_lock);
down_write(&SIT_I(sbi)->sentry_lock);
for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
err += __allocate_new_segment(sbi, i, false, false);
up_write(&SIT_I(sbi)->sentry_lock);
f2fs_up_read(&SM_I(sbi)->curseg_lock);
return err;
}
bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
struct cp_control *cpc)
{
__u64 trim_start = cpc->trim_start;
bool has_candidate = false;
down_write(&SIT_I(sbi)->sentry_lock);
for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) {
if (add_discard_addrs(sbi, cpc, true)) {
has_candidate = true;
break;
}
}
up_write(&SIT_I(sbi)->sentry_lock);
cpc->trim_start = trim_start;
return has_candidate;
}
static unsigned int __issue_discard_cmd_range(struct f2fs_sb_info *sbi,
struct discard_policy *dpolicy,
unsigned int start, unsigned int end)
{
struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
struct discard_cmd *prev_dc = NULL, *next_dc = NULL;
struct rb_node **insert_p = NULL, *insert_parent = NULL;
struct discard_cmd *dc;
struct blk_plug plug;
int issued;
unsigned int trimmed = 0;
next:
issued = 0;
mutex_lock(&dcc->cmd_lock);
if (unlikely(dcc->rbtree_check))
f2fs_bug_on(sbi, !f2fs_check_discard_tree(sbi));
dc = __lookup_discard_cmd_ret(&dcc->root, start,
&prev_dc, &next_dc, &insert_p, &insert_parent);
if (!dc)
dc = next_dc;
blk_start_plug(&plug);
while (dc && dc->di.lstart <= end) {
struct rb_node *node;
int err = 0;
if (dc->di.len < dpolicy->granularity)
goto skip;
if (dc->state != D_PREP) {
list_move_tail(&dc->list, &dcc->fstrim_list);
goto skip;
}
err = __submit_discard_cmd(sbi, dpolicy, dc, &issued);
if (issued >= dpolicy->max_requests) {
start = dc->di.lstart + dc->di.len;
if (err)
__remove_discard_cmd(sbi, dc);
blk_finish_plug(&plug);
mutex_unlock(&dcc->cmd_lock);
trimmed += __wait_all_discard_cmd(sbi, NULL);
f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
goto next;
}
skip:
node = rb_next(&dc->rb_node);
if (err)
__remove_discard_cmd(sbi, dc);
dc = rb_entry_safe(node, struct discard_cmd, rb_node);
if (fatal_signal_pending(current))
break;
}
blk_finish_plug(&plug);
mutex_unlock(&dcc->cmd_lock);
return trimmed;
}
int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
{
__u64 start = F2FS_BYTES_TO_BLK(range->start);
__u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
unsigned int start_segno, end_segno;
block_t start_block, end_block;
struct cp_control cpc;
struct discard_policy dpolicy;
unsigned long long trimmed = 0;
int err = 0;
bool need_align = f2fs_lfs_mode(sbi) && __is_large_section(sbi);
if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
return -EINVAL;
if (end < MAIN_BLKADDR(sbi))
goto out;
if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
f2fs_warn(sbi, "Found FS corruption, run fsck to fix.");
return -EFSCORRUPTED;
}
/* start/end segment number in main_area */
start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start);
end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
GET_SEGNO(sbi, end);
if (need_align) {
start_segno = rounddown(start_segno, SEGS_PER_SEC(sbi));
end_segno = roundup(end_segno + 1, SEGS_PER_SEC(sbi)) - 1;
}
cpc.reason = CP_DISCARD;
cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen));
cpc.trim_start = start_segno;
cpc.trim_end = end_segno;
if (sbi->discard_blks == 0)
goto out;
f2fs_down_write(&sbi->gc_lock);
stat_inc_cp_call_count(sbi, TOTAL_CALL);
err = f2fs_write_checkpoint(sbi, &cpc);
f2fs_up_write(&sbi->gc_lock);
if (err)
goto out;
/*
* We filed discard candidates, but actually we don't need to wait for
* all of them, since they'll be issued in idle time along with runtime
* discard option. User configuration looks like using runtime discard
* or periodic fstrim instead of it.
*/
if (f2fs_realtime_discard_enable(sbi))
goto out;
start_block = START_BLOCK(sbi, start_segno);
end_block = START_BLOCK(sbi, end_segno + 1);
__init_discard_policy(sbi, &dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen);
trimmed = __issue_discard_cmd_range(sbi, &dpolicy,
start_block, end_block);
trimmed += __wait_discard_cmd_range(sbi, &dpolicy,
start_block, end_block);
out:
if (!err)
range->len = F2FS_BLK_TO_BYTES(trimmed);
return err;
}
int f2fs_rw_hint_to_seg_type(struct f2fs_sb_info *sbi, enum rw_hint hint)
{
if (F2FS_OPTION(sbi).active_logs == 2)
return CURSEG_HOT_DATA;
else if (F2FS_OPTION(sbi).active_logs == 4)
return CURSEG_COLD_DATA;
/* active_log == 6 */
switch (hint) {
case WRITE_LIFE_SHORT:
return CURSEG_HOT_DATA;
case WRITE_LIFE_EXTREME:
return CURSEG_COLD_DATA;
default:
return CURSEG_WARM_DATA;
}
}
/*
* This returns write hints for each segment type. This hints will be
* passed down to block layer as below by default.
*
* User F2FS Block
* ---- ---- -----
* META WRITE_LIFE_NONE|REQ_META
* HOT_NODE WRITE_LIFE_NONE
* WARM_NODE WRITE_LIFE_MEDIUM
* COLD_NODE WRITE_LIFE_LONG
* ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
* extension list " "
*
* -- buffered io
* COLD_DATA WRITE_LIFE_EXTREME
* HOT_DATA WRITE_LIFE_SHORT
* WARM_DATA WRITE_LIFE_NOT_SET
*
* -- direct io
* WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
* WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
* WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
* WRITE_LIFE_NONE " WRITE_LIFE_NONE
* WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
* WRITE_LIFE_LONG " WRITE_LIFE_LONG
*/
enum rw_hint f2fs_io_type_to_rw_hint(struct f2fs_sb_info *sbi,
enum page_type type, enum temp_type temp)
{
switch (type) {
case DATA:
switch (temp) {
case WARM:
return WRITE_LIFE_NOT_SET;
case HOT:
return WRITE_LIFE_SHORT;
case COLD:
return WRITE_LIFE_EXTREME;
default:
return WRITE_LIFE_NONE;
}
case NODE:
switch (temp) {
case WARM:
return WRITE_LIFE_MEDIUM;
case HOT:
return WRITE_LIFE_NONE;
case COLD:
return WRITE_LIFE_LONG;
default:
return WRITE_LIFE_NONE;
}
case META:
return WRITE_LIFE_NONE;
default:
return WRITE_LIFE_NONE;
}
}
static int __get_segment_type_2(struct f2fs_io_info *fio)
{
if (fio->type == DATA)
return CURSEG_HOT_DATA;
else
return CURSEG_HOT_NODE;
}
static int __get_segment_type_4(struct f2fs_io_info *fio)
{
if (fio->type == DATA) {
struct inode *inode = fio->page->mapping->host;
if (S_ISDIR(inode->i_mode))
return CURSEG_HOT_DATA;
else
return CURSEG_COLD_DATA;
} else {
if (IS_DNODE(fio->page) && is_cold_node(fio->page))
return CURSEG_WARM_NODE;
else
return CURSEG_COLD_NODE;
}
}
static int __get_age_segment_type(struct inode *inode, pgoff_t pgofs)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct extent_info ei = {};
if (f2fs_lookup_age_extent_cache(inode, pgofs, &ei)) {
if (!ei.age)
return NO_CHECK_TYPE;
if (ei.age <= sbi->hot_data_age_threshold)
return CURSEG_HOT_DATA;
if (ei.age <= sbi->warm_data_age_threshold)
return CURSEG_WARM_DATA;
return CURSEG_COLD_DATA;
}
return NO_CHECK_TYPE;
}
static int __get_segment_type_6(struct f2fs_io_info *fio)
{
if (fio->type == DATA) {
struct inode *inode = fio->page->mapping->host;
int type;
if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
return CURSEG_COLD_DATA_PINNED;
if (page_private_gcing(fio->page)) {
if (fio->sbi->am.atgc_enabled &&
(fio->io_type == FS_DATA_IO) &&
(fio->sbi->gc_mode != GC_URGENT_HIGH) &&
__is_valid_data_blkaddr(fio->old_blkaddr) &&
!is_inode_flag_set(inode, FI_OPU_WRITE))
return CURSEG_ALL_DATA_ATGC;
else
return CURSEG_COLD_DATA;
}
if (file_is_cold(inode) || f2fs_need_compress_data(inode))
return CURSEG_COLD_DATA;
type = __get_age_segment_type(inode, fio->page->index);
if (type != NO_CHECK_TYPE)
return type;
if (file_is_hot(inode) ||
is_inode_flag_set(inode, FI_HOT_DATA) ||
f2fs_is_cow_file(inode))
return CURSEG_HOT_DATA;
return f2fs_rw_hint_to_seg_type(F2FS_I_SB(inode),
inode->i_write_hint);
} else {
if (IS_DNODE(fio->page))
return is_cold_node(fio->page) ? CURSEG_WARM_NODE :
CURSEG_HOT_NODE;
return CURSEG_COLD_NODE;
}
}
int f2fs_get_segment_temp(int seg_type)
{
if (IS_HOT(seg_type))
return HOT;
else if (IS_WARM(seg_type))
return WARM;
return COLD;
}
static int __get_segment_type(struct f2fs_io_info *fio)
{
int type = 0;
switch (F2FS_OPTION(fio->sbi).active_logs) {
case 2:
type = __get_segment_type_2(fio);
break;
case 4:
type = __get_segment_type_4(fio);
break;
case 6:
type = __get_segment_type_6(fio);
break;
default:
f2fs_bug_on(fio->sbi, true);
}
fio->temp = f2fs_get_segment_temp(type);
return type;
}
static void f2fs_randomize_chunk(struct f2fs_sb_info *sbi,
struct curseg_info *seg)
{
/* To allocate block chunks in different sizes, use random number */
if (--seg->fragment_remained_chunk > 0)
return;
seg->fragment_remained_chunk =
get_random_u32_inclusive(1, sbi->max_fragment_chunk);
seg->next_blkoff +=
get_random_u32_inclusive(1, sbi->max_fragment_hole);
}
static void reset_curseg_fields(struct curseg_info *curseg)
{
curseg->inited = false;
curseg->segno = NULL_SEGNO;
curseg->next_segno = 0;
}
int f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
block_t old_blkaddr, block_t *new_blkaddr,
struct f2fs_summary *sum, int type,
struct f2fs_io_info *fio)
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, type);
unsigned long long old_mtime;
bool from_gc = (type == CURSEG_ALL_DATA_ATGC);
struct seg_entry *se = NULL;
bool segment_full = false;
int ret = 0;
f2fs_down_read(&SM_I(sbi)->curseg_lock);
mutex_lock(&curseg->curseg_mutex);
down_write(&sit_i->sentry_lock);
if (curseg->segno == NULL_SEGNO) {
ret = -ENOSPC;
goto out_err;
}
if (from_gc) {
f2fs_bug_on(sbi, GET_SEGNO(sbi, old_blkaddr) == NULL_SEGNO);
se = get_seg_entry(sbi, GET_SEGNO(sbi, old_blkaddr));
sanity_check_seg_type(sbi, se->type);
f2fs_bug_on(sbi, IS_NODESEG(se->type));
}
*new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
f2fs_bug_on(sbi, curseg->next_blkoff >= BLKS_PER_SEG(sbi));
f2fs_wait_discard_bio(sbi, *new_blkaddr);
curseg->sum_blk->entries[curseg->next_blkoff] = *sum;
if (curseg->alloc_type == SSR) {
curseg->next_blkoff = f2fs_find_next_ssr_block(sbi, curseg);
} else {
curseg->next_blkoff++;
if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
f2fs_randomize_chunk(sbi, curseg);
}
if (curseg->next_blkoff >= f2fs_usable_blks_in_seg(sbi, curseg->segno))
segment_full = true;
stat_inc_block_count(sbi, curseg);
if (from_gc) {
old_mtime = get_segment_mtime(sbi, old_blkaddr);
} else {
update_segment_mtime(sbi, old_blkaddr, 0);
old_mtime = 0;
}
update_segment_mtime(sbi, *new_blkaddr, old_mtime);
/*
* SIT information should be updated before segment allocation,
* since SSR needs latest valid block information.
*/
update_sit_entry(sbi, *new_blkaddr, 1);
update_sit_entry(sbi, old_blkaddr, -1);
/*
* If the current segment is full, flush it out and replace it with a
* new segment.
*/
if (segment_full) {
if (type == CURSEG_COLD_DATA_PINNED &&
!((curseg->segno + 1) % sbi->segs_per_sec)) {
write_sum_page(sbi, curseg->sum_blk,
GET_SUM_BLOCK(sbi, curseg->segno));
reset_curseg_fields(curseg);
goto skip_new_segment;
}
if (from_gc) {
ret = get_atssr_segment(sbi, type, se->type,
AT_SSR, se->mtime);
} else {
if (need_new_seg(sbi, type))
ret = new_curseg(sbi, type, false);
else
ret = change_curseg(sbi, type);
stat_inc_seg_type(sbi, curseg);
}
if (ret)
goto out_err;
}
skip_new_segment:
/*
* segment dirty status should be updated after segment allocation,
* so we just need to update status only one time after previous
* segment being closed.
*/
locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr));
if (IS_DATASEG(curseg->seg_type))
atomic64_inc(&sbi->allocated_data_blocks);
up_write(&sit_i->sentry_lock);
if (page && IS_NODESEG(curseg->seg_type)) {
fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg));
f2fs_inode_chksum_set(sbi, page);
}
if (fio) {
struct f2fs_bio_info *io;
INIT_LIST_HEAD(&fio->list);
fio->in_list = 1;
io = sbi->write_io[fio->type] + fio->temp;
spin_lock(&io->io_lock);
list_add_tail(&fio->list, &io->io_list);
spin_unlock(&io->io_lock);
}
mutex_unlock(&curseg->curseg_mutex);
f2fs_up_read(&SM_I(sbi)->curseg_lock);
return 0;
out_err:
*new_blkaddr = NULL_ADDR;
up_write(&sit_i->sentry_lock);
mutex_unlock(&curseg->curseg_mutex);
f2fs_up_read(&SM_I(sbi)->curseg_lock);
return ret;
}
void f2fs_update_device_state(struct f2fs_sb_info *sbi, nid_t ino,
block_t blkaddr, unsigned int blkcnt)
{
if (!f2fs_is_multi_device(sbi))
return;
while (1) {
unsigned int devidx = f2fs_target_device_index(sbi, blkaddr);
unsigned int blks = FDEV(devidx).end_blk - blkaddr + 1;
/* update device state for fsync */
f2fs_set_dirty_device(sbi, ino, devidx, FLUSH_INO);
/* update device state for checkpoint */
if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) {
spin_lock(&sbi->dev_lock);
f2fs_set_bit(devidx, (char *)&sbi->dirty_device);
spin_unlock(&sbi->dev_lock);
}
if (blkcnt <= blks)
break;
blkcnt -= blks;
blkaddr += blks;
}
}
static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
{
int type = __get_segment_type(fio);
bool keep_order = (f2fs_lfs_mode(fio->sbi) && type == CURSEG_COLD_DATA);
if (keep_order)
f2fs_down_read(&fio->sbi->io_order_lock);
if (f2fs_allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr,
&fio->new_blkaddr, sum, type, fio)) {
if (fscrypt_inode_uses_fs_layer_crypto(fio->page->mapping->host))
fscrypt_finalize_bounce_page(&fio->encrypted_page);
end_page_writeback(fio->page);
if (f2fs_in_warm_node_list(fio->sbi, fio->page))
f2fs_del_fsync_node_entry(fio->sbi, fio->page);
goto out;
}
if (GET_SEGNO(fio->sbi, fio->old_blkaddr) != NULL_SEGNO)
f2fs_invalidate_internal_cache(fio->sbi, fio->old_blkaddr);
/* writeout dirty page into bdev */
f2fs_submit_page_write(fio);
f2fs_update_device_state(fio->sbi, fio->ino, fio->new_blkaddr, 1);
out:
if (keep_order)
f2fs_up_read(&fio->sbi->io_order_lock);
}
void f2fs_do_write_meta_page(struct f2fs_sb_info *sbi, struct page *page,
enum iostat_type io_type)
{
struct f2fs_io_info fio = {
.sbi = sbi,
.type = META,
.temp = HOT,
.op = REQ_OP_WRITE,
.op_flags = REQ_SYNC | REQ_META | REQ_PRIO,
.old_blkaddr = page->index,
.new_blkaddr = page->index,
.page = page,
.encrypted_page = NULL,
.in_list = 0,
};
if (unlikely(page->index >= MAIN_BLKADDR(sbi)))
fio.op_flags &= ~REQ_META;
set_page_writeback(page);
f2fs_submit_page_write(&fio);
stat_inc_meta_count(sbi, page->index);
f2fs_update_iostat(sbi, NULL, io_type, F2FS_BLKSIZE);
}
void f2fs_do_write_node_page(unsigned int nid, struct f2fs_io_info *fio)
{
struct f2fs_summary sum;
set_summary(&sum, nid, 0, 0);
do_write_page(&sum, fio);
f2fs_update_iostat(fio->sbi, NULL, fio->io_type, F2FS_BLKSIZE);
}
void f2fs_outplace_write_data(struct dnode_of_data *dn,
struct f2fs_io_info *fio)
{
struct f2fs_sb_info *sbi = fio->sbi;
struct f2fs_summary sum;
f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
if (fio->io_type == FS_DATA_IO || fio->io_type == FS_CP_DATA_IO)
f2fs_update_age_extent_cache(dn);
set_summary(&sum, dn->nid, dn->ofs_in_node, fio->version);
do_write_page(&sum, fio);
f2fs_update_data_blkaddr(dn, fio->new_blkaddr);
f2fs_update_iostat(sbi, dn->inode, fio->io_type, F2FS_BLKSIZE);
}
int f2fs_inplace_write_data(struct f2fs_io_info *fio)
{
int err;
struct f2fs_sb_info *sbi = fio->sbi;
unsigned int segno;
fio->new_blkaddr = fio->old_blkaddr;
/* i/o temperature is needed for passing down write hints */
__get_segment_type(fio);
segno = GET_SEGNO(sbi, fio->new_blkaddr);
if (!IS_DATASEG(get_seg_entry(sbi, segno)->type)) {
set_sbi_flag(sbi, SBI_NEED_FSCK);
f2fs_warn(sbi, "%s: incorrect segment(%u) type, run fsck to fix.",
__func__, segno);
err = -EFSCORRUPTED;
f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUM_TYPE);
goto drop_bio;
}
if (f2fs_cp_error(sbi)) {
err = -EIO;
goto drop_bio;
}
if (fio->meta_gc)
f2fs_truncate_meta_inode_pages(sbi, fio->new_blkaddr, 1);
stat_inc_inplace_blocks(fio->sbi);
if (fio->bio && !IS_F2FS_IPU_NOCACHE(sbi))
err = f2fs_merge_page_bio(fio);
else
err = f2fs_submit_page_bio(fio);
if (!err) {
f2fs_update_device_state(fio->sbi, fio->ino,
fio->new_blkaddr, 1);
f2fs_update_iostat(fio->sbi, fio->page->mapping->host,
fio->io_type, F2FS_BLKSIZE);
}
return err;
drop_bio:
if (fio->bio && *(fio->bio)) {
struct bio *bio = *(fio->bio);
bio->bi_status = BLK_STS_IOERR;
bio_endio(bio);
*(fio->bio) = NULL;
}
return err;
}
static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi,
unsigned int segno)
{
int i;
for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
if (CURSEG_I(sbi, i)->segno == segno)
break;
}
return i;
}
void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
block_t old_blkaddr, block_t new_blkaddr,
bool recover_curseg, bool recover_newaddr,
bool from_gc)
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg;
unsigned int segno, old_cursegno;
struct seg_entry *se;
int type;
unsigned short old_blkoff;
unsigned char old_alloc_type;
segno = GET_SEGNO(sbi, new_blkaddr);
se = get_seg_entry(sbi, segno);
type = se->type;
f2fs_down_write(&SM_I(sbi)->curseg_lock);
if (!recover_curseg) {
/* for recovery flow */
if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
if (old_blkaddr == NULL_ADDR)
type = CURSEG_COLD_DATA;
else
type = CURSEG_WARM_DATA;
}
} else {
if (IS_CURSEG(sbi, segno)) {
/* se->type is volatile as SSR allocation */
type = __f2fs_get_curseg(sbi, segno);
f2fs_bug_on(sbi, type == NO_CHECK_TYPE);
} else {
type = CURSEG_WARM_DATA;
}
}
f2fs_bug_on(sbi, !IS_DATASEG(type));
curseg = CURSEG_I(sbi, type);
mutex_lock(&curseg->curseg_mutex);
down_write(&sit_i->sentry_lock);
old_cursegno = curseg->segno;
old_blkoff = curseg->next_blkoff;
old_alloc_type = curseg->alloc_type;
/* change the current segment */
if (segno != curseg->segno) {
curseg->next_segno = segno;
if (change_curseg(sbi, type))
goto out_unlock;
}
curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
curseg->sum_blk->entries[curseg->next_blkoff] = *sum;
if (!recover_curseg || recover_newaddr) {
if (!from_gc)
update_segment_mtime(sbi, new_blkaddr, 0);
update_sit_entry(sbi, new_blkaddr, 1);
}
if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
f2fs_invalidate_internal_cache(sbi, old_blkaddr);
if (!from_gc)
update_segment_mtime(sbi, old_blkaddr, 0);
update_sit_entry(sbi, old_blkaddr, -1);
}
locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr));
locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr));
locate_dirty_segment(sbi, old_cursegno);
if (recover_curseg) {
if (old_cursegno != curseg->segno) {
curseg->next_segno = old_cursegno;
if (change_curseg(sbi, type))
goto out_unlock;
}
curseg->next_blkoff = old_blkoff;
curseg->alloc_type = old_alloc_type;
}
out_unlock:
up_write(&sit_i->sentry_lock);
mutex_unlock(&curseg->curseg_mutex);
f2fs_up_write(&SM_I(sbi)->curseg_lock);
}
void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn,
block_t old_addr, block_t new_addr,
unsigned char version, bool recover_curseg,
bool recover_newaddr)
{
struct f2fs_summary sum;
set_summary(&sum, dn->nid, dn->ofs_in_node, version);
f2fs_do_replace_block(sbi, &sum, old_addr, new_addr,
recover_curseg, recover_newaddr, false);
f2fs_update_data_blkaddr(dn, new_addr);
}
void f2fs_wait_on_page_writeback(struct page *page,
enum page_type type, bool ordered, bool locked)
{
if (folio_test_writeback(page_folio(page))) {
struct f2fs_sb_info *sbi = F2FS_P_SB(page);
/* submit cached LFS IO */
f2fs_submit_merged_write_cond(sbi, NULL, page, 0, type);
/* submit cached IPU IO */
f2fs_submit_merged_ipu_write(sbi, NULL, page);
if (ordered) {
wait_on_page_writeback(page);
f2fs_bug_on(sbi, locked &&
folio_test_writeback(page_folio(page)));
} else {
wait_for_stable_page(page);
}
}
}
void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct page *cpage;
if (!f2fs_meta_inode_gc_required(inode))
return;
if (!__is_valid_data_blkaddr(blkaddr))
return;
cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
if (cpage) {
f2fs_wait_on_page_writeback(cpage, DATA, true, true);
f2fs_put_page(cpage, 1);
}
}
void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
block_t len)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
block_t i;
if (!f2fs_meta_inode_gc_required(inode))
return;
for (i = 0; i < len; i++)
f2fs_wait_on_block_writeback(inode, blkaddr + i);
f2fs_truncate_meta_inode_pages(sbi, blkaddr, len);
}
static int read_compacted_summaries(struct f2fs_sb_info *sbi)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
struct curseg_info *seg_i;
unsigned char *kaddr;
struct page *page;
block_t start;
int i, j, offset;
start = start_sum_block(sbi);
page = f2fs_get_meta_page(sbi, start++);
if (IS_ERR(page))
return PTR_ERR(page);
kaddr = (unsigned char *)page_address(page);
/* Step 1: restore nat cache */
seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
/* Step 2: restore sit cache */
seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
offset = 2 * SUM_JOURNAL_SIZE;
/* Step 3: restore summary entries */
for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
unsigned short blk_off;
unsigned int segno;
seg_i = CURSEG_I(sbi, i);
segno = le32_to_cpu(ckpt->cur_data_segno[i]);
blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
seg_i->next_segno = segno;
reset_curseg(sbi, i, 0);
seg_i->alloc_type = ckpt->alloc_type[i];
seg_i->next_blkoff = blk_off;
if (seg_i->alloc_type == SSR)
blk_off = BLKS_PER_SEG(sbi);
for (j = 0; j < blk_off; j++) {
struct f2fs_summary *s;
s = (struct f2fs_summary *)(kaddr + offset);
seg_i->sum_blk->entries[j] = *s;
offset += SUMMARY_SIZE;
if (offset + SUMMARY_SIZE <= PAGE_SIZE -
SUM_FOOTER_SIZE)
continue;
f2fs_put_page(page, 1);
page = NULL;
page = f2fs_get_meta_page(sbi, start++);
if (IS_ERR(page))
return PTR_ERR(page);
kaddr = (unsigned char *)page_address(page);
offset = 0;
}
}
f2fs_put_page(page, 1);
return 0;
}
static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
struct f2fs_summary_block *sum;
struct curseg_info *curseg;
struct page *new;
unsigned short blk_off;
unsigned int segno = 0;
block_t blk_addr = 0;
int err = 0;
/* get segment number and block addr */
if (IS_DATASEG(type)) {
segno = le32_to_cpu(ckpt->cur_data_segno[type]);
blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
CURSEG_HOT_DATA]);
if (__exist_node_summaries(sbi))
blk_addr = sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type);
else
blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
} else {
segno = le32_to_cpu(ckpt->cur_node_segno[type -
CURSEG_HOT_NODE]);
blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -
CURSEG_HOT_NODE]);
if (__exist_node_summaries(sbi))
blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,
type - CURSEG_HOT_NODE);
else
blk_addr = GET_SUM_BLOCK(sbi, segno);
}
new = f2fs_get_meta_page(sbi, blk_addr);
if (IS_ERR(new))
return PTR_ERR(new);
sum = (struct f2fs_summary_block *)page_address(new);
if (IS_NODESEG(type)) {
if (__exist_node_summaries(sbi)) {
struct f2fs_summary *ns = &sum->entries[0];
int i;
for (i = 0; i < BLKS_PER_SEG(sbi); i++, ns++) {
ns->version = 0;
ns->ofs_in_node = 0;
}
} else {
err = f2fs_restore_node_summary(sbi, segno, sum);
if (err)
goto out;
}
}
/* set uncompleted segment to curseg */
curseg = CURSEG_I(sbi, type);
mutex_lock(&curseg->curseg_mutex);
/* update journal info */
down_write(&curseg->journal_rwsem);
memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
up_write(&curseg->journal_rwsem);
memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
curseg->next_segno = segno;
reset_curseg(sbi, type, 0);
curseg->alloc_type = ckpt->alloc_type[type];
curseg->next_blkoff = blk_off;
mutex_unlock(&curseg->curseg_mutex);
out:
f2fs_put_page(new, 1);
return err;
}
static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
{
struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal;
struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal;
int type = CURSEG_HOT_DATA;
int err;
if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) {
int npages = f2fs_npages_for_summary_flush(sbi, true);
if (npages >= 2)
f2fs_ra_meta_pages(sbi, start_sum_block(sbi), npages,
META_CP, true);
/* restore for compacted data summary */
err = read_compacted_summaries(sbi);
if (err)
return err;
type = CURSEG_HOT_NODE;
}
if (__exist_node_summaries(sbi))
f2fs_ra_meta_pages(sbi,
sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type),
NR_CURSEG_PERSIST_TYPE - type, META_CP, true);
for (; type <= CURSEG_COLD_NODE; type++) {
err = read_normal_summaries(sbi, type);
if (err)
return err;
}
/* sanity check for summary blocks */
if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) {
f2fs_err(sbi, "invalid journal entries nats %u sits %u",
nats_in_cursum(nat_j), sits_in_cursum(sit_j));
return -EINVAL;
}
return 0;
}
static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
{
struct page *page;
unsigned char *kaddr;
struct f2fs_summary *summary;
struct curseg_info *seg_i;
int written_size = 0;
int i, j;
page = f2fs_grab_meta_page(sbi, blkaddr++);
kaddr = (unsigned char *)page_address(page);
memset(kaddr, 0, PAGE_SIZE);
/* Step 1: write nat cache */
seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
written_size += SUM_JOURNAL_SIZE;
/* Step 2: write sit cache */
seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
written_size += SUM_JOURNAL_SIZE;
/* Step 3: write summary entries */
for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
seg_i = CURSEG_I(sbi, i);
for (j = 0; j < f2fs_curseg_valid_blocks(sbi, i); j++) {
if (!page) {
page = f2fs_grab_meta_page(sbi, blkaddr++);
kaddr = (unsigned char *)page_address(page);
memset(kaddr, 0, PAGE_SIZE);
written_size = 0;
}
summary = (struct f2fs_summary *)(kaddr + written_size);
*summary = seg_i->sum_blk->entries[j];
written_size += SUMMARY_SIZE;
if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
SUM_FOOTER_SIZE)
continue;
set_page_dirty(page);
f2fs_put_page(page, 1);
page = NULL;
}
}
if (page) {
set_page_dirty(page);
f2fs_put_page(page, 1);
}
}
static void write_normal_summaries(struct f2fs_sb_info *sbi,
block_t blkaddr, int type)
{
int i, end;
if (IS_DATASEG(type))
end = type + NR_CURSEG_DATA_TYPE;
else
end = type + NR_CURSEG_NODE_TYPE;
for (i = type; i < end; i++)
write_current_sum_page(sbi, i, blkaddr + (i - type));
}
void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
{
if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG))
write_compacted_summaries(sbi, start_blk);
else
write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA);
}
void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
{
write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
}
int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
unsigned int val, int alloc)
{
int i;
if (type == NAT_JOURNAL) {
for (i = 0; i < nats_in_cursum(journal); i++) {
if (le32_to_cpu(nid_in_journal(journal, i)) == val)
return i;
}
if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
return update_nats_in_cursum(journal, 1);
} else if (type == SIT_JOURNAL) {
for (i = 0; i < sits_in_cursum(journal); i++)
if (le32_to_cpu(segno_in_journal(journal, i)) == val)
return i;
if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
return update_sits_in_cursum(journal, 1);
}
return -1;
}
static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
unsigned int segno)
{
return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
}
static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
unsigned int start)
{
struct sit_info *sit_i = SIT_I(sbi);
struct page *page;
pgoff_t src_off, dst_off;
src_off = current_sit_addr(sbi, start);
dst_off = next_sit_addr(sbi, src_off);
page = f2fs_grab_meta_page(sbi, dst_off);
seg_info_to_sit_page(sbi, page, start);
set_page_dirty(page);
set_to_next_sit(sit_i, start);
return page;
}
static struct sit_entry_set *grab_sit_entry_set(void)
{
struct sit_entry_set *ses =
f2fs_kmem_cache_alloc(sit_entry_set_slab,
GFP_NOFS, true, NULL);
ses->entry_cnt = 0;
INIT_LIST_HEAD(&ses->set_list);
return ses;
}
static void release_sit_entry_set(struct sit_entry_set *ses)
{
list_del(&ses->set_list);
kmem_cache_free(sit_entry_set_slab, ses);
}
static void adjust_sit_entry_set(struct sit_entry_set *ses,
struct list_head *head)
{
struct sit_entry_set *next = ses;
if (list_is_last(&ses->set_list, head))
return;
list_for_each_entry_continue(next, head, set_list)
if (ses->entry_cnt <= next->entry_cnt) {
list_move_tail(&ses->set_list, &next->set_list);
return;
}
list_move_tail(&ses->set_list, head);
}
static void add_sit_entry(unsigned int segno, struct list_head *head)
{
struct sit_entry_set *ses;
unsigned int start_segno = START_SEGNO(segno);
list_for_each_entry(ses, head, set_list) {
if (ses->start_segno == start_segno) {
ses->entry_cnt++;
adjust_sit_entry_set(ses, head);
return;
}
}
ses = grab_sit_entry_set();
ses->start_segno = start_segno;
ses->entry_cnt++;
list_add(&ses->set_list, head);
}
static void add_sits_in_set(struct f2fs_sb_info *sbi)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
struct list_head *set_list = &sm_info->sit_entry_set;
unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap;
unsigned int segno;
for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi))
add_sit_entry(segno, set_list);
}
static void remove_sits_in_journal(struct f2fs_sb_info *sbi)
{
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
struct f2fs_journal *journal = curseg->journal;
int i;
down_write(&curseg->journal_rwsem);
for (i = 0; i < sits_in_cursum(journal); i++) {
unsigned int segno;
bool dirtied;
segno = le32_to_cpu(segno_in_journal(journal, i));
dirtied = __mark_sit_entry_dirty(sbi, segno);
if (!dirtied)
add_sit_entry(segno, &SM_I(sbi)->sit_entry_set);
}
update_sits_in_cursum(journal, -i);
up_write(&curseg->journal_rwsem);
}
/*
* CP calls this function, which flushes SIT entries including sit_journal,
* and moves prefree segs to free segs.
*/
void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
{
struct sit_info *sit_i = SIT_I(sbi);
unsigned long *bitmap = sit_i->dirty_sentries_bitmap;
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
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 = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS);
struct seg_entry *se;
down_write(&sit_i->sentry_lock);
if (!sit_i->dirty_sentries)
goto out;
/*
* add and account sit entries of dirty bitmap in sit entry
* set temporarily
*/
add_sits_in_set(sbi);
/*
* if there are no enough space in journal to store dirty sit
* 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) ||
!to_journal)
remove_sits_in_journal(sbi);
/*
* there are two steps to flush sit entries:
* #1, flush sit entries to journal in current cold data summary block.
* #2, flush sit entries to sit page.
*/
list_for_each_entry_safe(ses, tmp, head, set_list) {
struct page *page = NULL;
struct f2fs_sit_block *raw_sit = NULL;
unsigned int start_segno = ses->start_segno;
unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK,
(unsigned long)MAIN_SEGS(sbi));
unsigned int segno = start_segno;
if (to_journal &&
!__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
to_journal = false;
if (to_journal) {
down_write(&curseg->journal_rwsem);
} else {
page = get_next_sit_page(sbi, start_segno);
raw_sit = page_address(page);
}
/* flush dirty sit entries in region of current sit set */
for_each_set_bit_from(segno, bitmap, end) {
int offset, sit_offset;
se = get_seg_entry(sbi, segno);
#ifdef CONFIG_F2FS_CHECK_FS
if (memcmp(se->cur_valid_map, se->cur_valid_map_mir,
SIT_VBLOCK_MAP_SIZE))
f2fs_bug_on(sbi, 1);
#endif
/* add discard candidates */
if (!(cpc->reason & CP_DISCARD)) {
cpc->trim_start = segno;
add_discard_addrs(sbi, cpc, false);
}
if (to_journal) {
offset = f2fs_lookup_journal_in_cursum(journal,
SIT_JOURNAL, segno, 1);
f2fs_bug_on(sbi, offset < 0);
segno_in_journal(journal, offset) =
cpu_to_le32(segno);
seg_info_to_raw_sit(se,
&sit_in_journal(journal, offset));
check_block_count(sbi, segno,
&sit_in_journal(journal, offset));
} else {
sit_offset = SIT_ENTRY_OFFSET(sit_i, segno);
seg_info_to_raw_sit(se,
&raw_sit->entries[sit_offset]);
check_block_count(sbi, segno,
&raw_sit->entries[sit_offset]);
}
__clear_bit(segno, bitmap);
sit_i->dirty_sentries--;
ses->entry_cnt--;
}
if (to_journal)
up_write(&curseg->journal_rwsem);
else
f2fs_put_page(page, 1);
f2fs_bug_on(sbi, ses->entry_cnt);
release_sit_entry_set(ses);
}
f2fs_bug_on(sbi, !list_empty(head));
f2fs_bug_on(sbi, sit_i->dirty_sentries);
out:
if (cpc->reason & CP_DISCARD) {
__u64 trim_start = cpc->trim_start;
for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++)
add_discard_addrs(sbi, cpc, false);
cpc->trim_start = trim_start;
}
up_write(&sit_i->sentry_lock);
set_prefree_as_free_segments(sbi);
}
static int build_sit_info(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
struct sit_info *sit_i;
unsigned int sit_segs, start;
char *src_bitmap, *bitmap;
unsigned int bitmap_size, main_bitmap_size, sit_bitmap_size;
unsigned int discard_map = f2fs_block_unit_discard(sbi) ? 1 : 0;
/* allocate memory for SIT information */
sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL);
if (!sit_i)
return -ENOMEM;
SM_I(sbi)->sit_info = sit_i;
sit_i->sentries =
f2fs_kvzalloc(sbi, array_size(sizeof(struct seg_entry),
MAIN_SEGS(sbi)),
GFP_KERNEL);
if (!sit_i->sentries)
return -ENOMEM;
main_bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, main_bitmap_size,
GFP_KERNEL);
if (!sit_i->dirty_sentries_bitmap)
return -ENOMEM;
#ifdef CONFIG_F2FS_CHECK_FS
bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (3 + discard_map);
#else
bitmap_size = MAIN_SEGS(sbi) * SIT_VBLOCK_MAP_SIZE * (2 + discard_map);
#endif
sit_i->bitmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
if (!sit_i->bitmap)
return -ENOMEM;
bitmap = sit_i->bitmap;
for (start = 0; start < MAIN_SEGS(sbi); start++) {
sit_i->sentries[start].cur_valid_map = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
sit_i->sentries[start].ckpt_valid_map = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
#ifdef CONFIG_F2FS_CHECK_FS
sit_i->sentries[start].cur_valid_map_mir = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
#endif
if (discard_map) {
sit_i->sentries[start].discard_map = bitmap;
bitmap += SIT_VBLOCK_MAP_SIZE;
}
}
sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL);
if (!sit_i->tmp_map)
return -ENOMEM;
if (__is_large_section(sbi)) {
sit_i->sec_entries =
f2fs_kvzalloc(sbi, array_size(sizeof(struct sec_entry),
MAIN_SECS(sbi)),
GFP_KERNEL);
if (!sit_i->sec_entries)
return -ENOMEM;
}
/* get information related with SIT */
sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1;
/* setup SIT bitmap from ckeckpoint pack */
sit_bitmap_size = __bitmap_size(sbi, SIT_BITMAP);
src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP);
sit_i->sit_bitmap = kmemdup(src_bitmap, sit_bitmap_size, GFP_KERNEL);
if (!sit_i->sit_bitmap)
return -ENOMEM;
#ifdef CONFIG_F2FS_CHECK_FS
sit_i->sit_bitmap_mir = kmemdup(src_bitmap,
sit_bitmap_size, GFP_KERNEL);
if (!sit_i->sit_bitmap_mir)
return -ENOMEM;
sit_i->invalid_segmap = f2fs_kvzalloc(sbi,
main_bitmap_size, GFP_KERNEL);
if (!sit_i->invalid_segmap)
return -ENOMEM;
#endif
sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr);
sit_i->sit_blocks = SEGS_TO_BLKS(sbi, sit_segs);
sit_i->written_valid_blocks = 0;
sit_i->bitmap_size = sit_bitmap_size;
sit_i->dirty_sentries = 0;
sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK;
sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time);
sit_i->mounted_time = ktime_get_boottime_seconds();
init_rwsem(&sit_i->sentry_lock);
return 0;
}
static int build_free_segmap(struct f2fs_sb_info *sbi)
{
struct free_segmap_info *free_i;
unsigned int bitmap_size, sec_bitmap_size;
/* allocate memory for free segmap information */
free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL);
if (!free_i)
return -ENOMEM;
SM_I(sbi)->free_info = free_i;
bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL);
if (!free_i->free_segmap)
return -ENOMEM;
sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL);
if (!free_i->free_secmap)
return -ENOMEM;
/* set all segments as dirty temporarily */
memset(free_i->free_segmap, 0xff, bitmap_size);
memset(free_i->free_secmap, 0xff, sec_bitmap_size);
/* init free segmap information */
free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi));
free_i->free_segments = 0;
free_i->free_sections = 0;
spin_lock_init(&free_i->segmap_lock);
return 0;
}
static int build_curseg(struct f2fs_sb_info *sbi)
{
struct curseg_info *array;
int i;
array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE,
sizeof(*array)), GFP_KERNEL);
if (!array)
return -ENOMEM;
SM_I(sbi)->curseg_array = array;
for (i = 0; i < NO_CHECK_TYPE; i++) {
mutex_init(&array[i].curseg_mutex);
array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
if (!array[i].sum_blk)
return -ENOMEM;
init_rwsem(&array[i].journal_rwsem);
array[i].journal = f2fs_kzalloc(sbi,
sizeof(struct f2fs_journal), GFP_KERNEL);
if (!array[i].journal)
return -ENOMEM;
if (i < NR_PERSISTENT_LOG)
array[i].seg_type = CURSEG_HOT_DATA + i;
else if (i == CURSEG_COLD_DATA_PINNED)
array[i].seg_type = CURSEG_COLD_DATA;
else if (i == CURSEG_ALL_DATA_ATGC)
array[i].seg_type = CURSEG_COLD_DATA;
reset_curseg_fields(&array[i]);
}
return restore_curseg_summaries(sbi);
}
static int build_sit_entries(struct f2fs_sb_info *sbi)
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
struct f2fs_journal *journal = curseg->journal;
struct seg_entry *se;
struct f2fs_sit_entry sit;
int sit_blk_cnt = SIT_BLK_CNT(sbi);
unsigned int i, start, end;
unsigned int readed, start_blk = 0;
int err = 0;
block_t sit_valid_blocks[2] = {0, 0};
do {
readed = f2fs_ra_meta_pages(sbi, start_blk, BIO_MAX_VECS,
META_SIT, true);
start = start_blk * sit_i->sents_per_block;
end = (start_blk + readed) * sit_i->sents_per_block;
for (; start < end && start < MAIN_SEGS(sbi); start++) {
struct f2fs_sit_block *sit_blk;
struct page *page;
se = &sit_i->sentries[start];
page = get_current_sit_page(sbi, start);
if (IS_ERR(page))
return PTR_ERR(page);
sit_blk = (struct f2fs_sit_block *)page_address(page);
sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
f2fs_put_page(page, 1);
err = check_block_count(sbi, start, &sit);
if (err)
return err;
seg_info_from_raw_sit(se, &sit);
if (se->type >= NR_PERSISTENT_LOG) {
f2fs_err(sbi, "Invalid segment type: %u, segno: %u",
se->type, start);
f2fs_handle_error(sbi,
ERROR_INCONSISTENT_SUM_TYPE);
return -EFSCORRUPTED;
}
sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks;
if (!f2fs_block_unit_discard(sbi))
goto init_discard_map_done;
/* build discard map only one time */
if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
memset(se->discard_map, 0xff,
SIT_VBLOCK_MAP_SIZE);
goto init_discard_map_done;
}
memcpy(se->discard_map, se->cur_valid_map,
SIT_VBLOCK_MAP_SIZE);
sbi->discard_blks += BLKS_PER_SEG(sbi) -
se->valid_blocks;
init_discard_map_done:
if (__is_large_section(sbi))
get_sec_entry(sbi, start)->valid_blocks +=
se->valid_blocks;
}
start_blk += readed;
} while (start_blk < sit_blk_cnt);
down_read(&curseg->journal_rwsem);
for (i = 0; i < sits_in_cursum(journal); i++) {
unsigned int old_valid_blocks;
start = le32_to_cpu(segno_in_journal(journal, i));
if (start >= MAIN_SEGS(sbi)) {
f2fs_err(sbi, "Wrong journal entry on segno %u",
start);
err = -EFSCORRUPTED;
f2fs_handle_error(sbi, ERROR_CORRUPTED_JOURNAL);
break;
}
se = &sit_i->sentries[start];
sit = sit_in_journal(journal, i);
old_valid_blocks = se->valid_blocks;
sit_valid_blocks[SE_PAGETYPE(se)] -= old_valid_blocks;
err = check_block_count(sbi, start, &sit);
if (err)
break;
seg_info_from_raw_sit(se, &sit);
if (se->type >= NR_PERSISTENT_LOG) {
f2fs_err(sbi, "Invalid segment type: %u, segno: %u",
se->type, start);
err = -EFSCORRUPTED;
f2fs_handle_error(sbi, ERROR_INCONSISTENT_SUM_TYPE);
break;
}
sit_valid_blocks[SE_PAGETYPE(se)] += se->valid_blocks;
if (f2fs_block_unit_discard(sbi)) {
if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) {
memset(se->discard_map, 0xff, SIT_VBLOCK_MAP_SIZE);
} else {
memcpy(se->discard_map, se->cur_valid_map,
SIT_VBLOCK_MAP_SIZE);
sbi->discard_blks += old_valid_blocks;
sbi->discard_blks -= se->valid_blocks;
}
}
if (__is_large_section(sbi)) {
get_sec_entry(sbi, start)->valid_blocks +=
se->valid_blocks;
get_sec_entry(sbi, start)->valid_blocks -=
old_valid_blocks;
}
}
up_read(&curseg->journal_rwsem);
if (err)
return err;
if (sit_valid_blocks[NODE] != valid_node_count(sbi)) {
f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
sit_valid_blocks[NODE], valid_node_count(sbi));
f2fs_handle_error(sbi, ERROR_INCONSISTENT_NODE_COUNT);
return -EFSCORRUPTED;
}
if (sit_valid_blocks[DATA] + sit_valid_blocks[NODE] >
valid_user_blocks(sbi)) {
f2fs_err(sbi, "SIT is corrupted data# %u %u vs %u",
sit_valid_blocks[DATA], sit_valid_blocks[NODE],
valid_user_blocks(sbi));
f2fs_handle_error(sbi, ERROR_INCONSISTENT_BLOCK_COUNT);
return -EFSCORRUPTED;
}
return 0;
}
static void init_free_segmap(struct f2fs_sb_info *sbi)
{
unsigned int start;
int type;
struct seg_entry *sentry;
for (start = 0; start < MAIN_SEGS(sbi); start++) {
if (f2fs_usable_blks_in_seg(sbi, start) == 0)
continue;
sentry = get_seg_entry(sbi, start);
if (!sentry->valid_blocks)
__set_free(sbi, start);
else
SIT_I(sbi)->written_valid_blocks +=
sentry->valid_blocks;
}
/* set use the current segments */
for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) {
struct curseg_info *curseg_t = CURSEG_I(sbi, type);
__set_test_and_inuse(sbi, curseg_t->segno);
}
}
static void init_dirty_segmap(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
struct free_segmap_info *free_i = FREE_I(sbi);
unsigned int segno = 0, offset = 0, secno;
block_t valid_blocks, usable_blks_in_seg;
while (1) {
/* find dirty segment based on free segmap */
segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset);
if (segno >= MAIN_SEGS(sbi))
break;
offset = segno + 1;
valid_blocks = get_valid_blocks(sbi, segno, false);
usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
if (valid_blocks == usable_blks_in_seg || !valid_blocks)
continue;
if (valid_blocks > usable_blks_in_seg) {
f2fs_bug_on(sbi, 1);
continue;
}
mutex_lock(&dirty_i->seglist_lock);
__locate_dirty_segment(sbi, segno, DIRTY);
mutex_unlock(&dirty_i->seglist_lock);
}
if (!__is_large_section(sbi))
return;
mutex_lock(&dirty_i->seglist_lock);
for (segno = 0; segno < MAIN_SEGS(sbi); segno += SEGS_PER_SEC(sbi)) {
valid_blocks = get_valid_blocks(sbi, segno, true);
secno = GET_SEC_FROM_SEG(sbi, segno);
if (!valid_blocks || valid_blocks == CAP_BLKS_PER_SEC(sbi))
continue;
if (IS_CURSEC(sbi, secno))
continue;
set_bit(secno, dirty_i->dirty_secmap);
}
mutex_unlock(&dirty_i->seglist_lock);
}
static int init_victim_secmap(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
if (!dirty_i->victim_secmap)
return -ENOMEM;
dirty_i->pinned_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL);
if (!dirty_i->pinned_secmap)
return -ENOMEM;
dirty_i->pinned_secmap_cnt = 0;
dirty_i->enable_pin_section = true;
return 0;
}
static int build_dirty_segmap(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i;
unsigned int bitmap_size, i;
/* allocate memory for dirty segments list information */
dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info),
GFP_KERNEL);
if (!dirty_i)
return -ENOMEM;
SM_I(sbi)->dirty_info = dirty_i;
mutex_init(&dirty_i->seglist_lock);
bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi));
for (i = 0; i < NR_DIRTY_TYPE; i++) {
dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size,
GFP_KERNEL);
if (!dirty_i->dirty_segmap[i])
return -ENOMEM;
}
if (__is_large_section(sbi)) {
bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi));
dirty_i->dirty_secmap = f2fs_kvzalloc(sbi,
bitmap_size, GFP_KERNEL);
if (!dirty_i->dirty_secmap)
return -ENOMEM;
}
init_dirty_segmap(sbi);
return init_victim_secmap(sbi);
}
static int sanity_check_curseg(struct f2fs_sb_info *sbi)
{
int i;
/*
* In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
* In LFS curseg, all blkaddr after .next_blkoff should be unused.
*/
for (i = 0; i < NR_PERSISTENT_LOG; i++) {
struct curseg_info *curseg = CURSEG_I(sbi, i);
struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
unsigned int blkofs = curseg->next_blkoff;
if (f2fs_sb_has_readonly(sbi) &&
i != CURSEG_HOT_DATA && i != CURSEG_HOT_NODE)
continue;
sanity_check_seg_type(sbi, curseg->seg_type);
if (curseg->alloc_type != LFS && curseg->alloc_type != SSR) {
f2fs_err(sbi,
"Current segment has invalid alloc_type:%d",
curseg->alloc_type);
f2fs_handle_error(sbi, ERROR_INVALID_CURSEG);
return -EFSCORRUPTED;
}
if (f2fs_test_bit(blkofs, se->cur_valid_map))
goto out;
if (curseg->alloc_type == SSR)
continue;
for (blkofs += 1; blkofs < BLKS_PER_SEG(sbi); blkofs++) {
if (!f2fs_test_bit(blkofs, se->cur_valid_map))
continue;
out:
f2fs_err(sbi,
"Current segment's next free block offset is inconsistent with bitmap, logtype:%u, segno:%u, type:%u, next_blkoff:%u, blkofs:%u",
i, curseg->segno, curseg->alloc_type,
curseg->next_blkoff, blkofs);
f2fs_handle_error(sbi, ERROR_INVALID_CURSEG);
return -EFSCORRUPTED;
}
}
return 0;
}
#ifdef CONFIG_BLK_DEV_ZONED
static int check_zone_write_pointer(struct f2fs_sb_info *sbi,
struct f2fs_dev_info *fdev,
struct blk_zone *zone)
{
unsigned int zone_segno;
block_t zone_block, valid_block_cnt;
unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
int ret;
unsigned int nofs_flags;
if (zone->type != BLK_ZONE_TYPE_SEQWRITE_REQ)
return 0;
zone_block = fdev->start_blk + (zone->start >> log_sectors_per_block);
zone_segno = GET_SEGNO(sbi, zone_block);
/*
* Skip check of zones cursegs point to, since
* fix_curseg_write_pointer() checks them.
*/
if (zone_segno >= MAIN_SEGS(sbi))
return 0;
/*
* Get # of valid block of the zone.
*/
valid_block_cnt = get_valid_blocks(sbi, zone_segno, true);
if (IS_CURSEC(sbi, GET_SEC_FROM_SEG(sbi, zone_segno))) {
f2fs_notice(sbi, "Open zones: valid block[0x%x,0x%x] cond[%s]",
zone_segno, valid_block_cnt,
blk_zone_cond_str(zone->cond));
return 0;
}
if ((!valid_block_cnt && zone->cond == BLK_ZONE_COND_EMPTY) ||
(valid_block_cnt && zone->cond == BLK_ZONE_COND_FULL))
return 0;
if (!valid_block_cnt) {
f2fs_notice(sbi, "Zone without valid block has non-zero write "
"pointer. Reset the write pointer: cond[%s]",
blk_zone_cond_str(zone->cond));
ret = __f2fs_issue_discard_zone(sbi, fdev->bdev, zone_block,
zone->len >> log_sectors_per_block);
if (ret)
f2fs_err(sbi, "Discard zone failed: %s (errno=%d)",
fdev->path, ret);
return ret;
}
/*
* If there are valid blocks and the write pointer doesn't match
* with them, we need to report the inconsistency and fill
* the zone till the end to close the zone. This inconsistency
* does not cause write error because the zone will not be
* selected for write operation until it get discarded.
*/
f2fs_notice(sbi, "Valid blocks are not aligned with write "
"pointer: valid block[0x%x,0x%x] cond[%s]",
zone_segno, valid_block_cnt, blk_zone_cond_str(zone->cond));
nofs_flags = memalloc_nofs_save();
ret = blkdev_zone_mgmt(fdev->bdev, REQ_OP_ZONE_FINISH,
zone->start, zone->len);
memalloc_nofs_restore(nofs_flags);
if (ret == -EOPNOTSUPP) {
ret = blkdev_issue_zeroout(fdev->bdev, zone->wp,
zone->len - (zone->wp - zone->start),
GFP_NOFS, 0);
if (ret)
f2fs_err(sbi, "Fill up zone failed: %s (errno=%d)",
fdev->path, ret);
} else if (ret) {
f2fs_err(sbi, "Finishing zone failed: %s (errno=%d)",
fdev->path, ret);
}
return ret;
}
static struct f2fs_dev_info *get_target_zoned_dev(struct f2fs_sb_info *sbi,
block_t zone_blkaddr)
{
int i;
for (i = 0; i < sbi->s_ndevs; i++) {
if (!bdev_is_zoned(FDEV(i).bdev))
continue;
if (sbi->s_ndevs == 1 || (FDEV(i).start_blk <= zone_blkaddr &&
zone_blkaddr <= FDEV(i).end_blk))
return &FDEV(i);
}
return NULL;
}
static int report_one_zone_cb(struct blk_zone *zone, unsigned int idx,
void *data)
{
memcpy(data, zone, sizeof(struct blk_zone));
return 0;
}
static int fix_curseg_write_pointer(struct f2fs_sb_info *sbi, int type)
{
struct curseg_info *cs = CURSEG_I(sbi, type);
struct f2fs_dev_info *zbd;
struct blk_zone zone;
unsigned int cs_section, wp_segno, wp_blkoff, wp_sector_off;
block_t cs_zone_block, wp_block;
unsigned int log_sectors_per_block = sbi->log_blocksize - SECTOR_SHIFT;
sector_t zone_sector;
int err;
cs_section = GET_SEC_FROM_SEG(sbi, cs->segno);
cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section));
zbd = get_target_zoned_dev(sbi, cs_zone_block);
if (!zbd)
return 0;
/* report zone for the sector the curseg points to */
zone_sector = (sector_t)(cs_zone_block - zbd->start_blk)
<< log_sectors_per_block;
err = blkdev_report_zones(zbd->bdev, zone_sector, 1,
report_one_zone_cb, &zone);
if (err != 1) {
f2fs_err(sbi, "Report zone failed: %s errno=(%d)",
zbd->path, err);
return err;
}
if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ)
return 0;
/*
* When safely unmounted in the previous mount, we could use current
* segments. Otherwise, allocate new sections.
*/
if (is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
wp_block = zbd->start_blk + (zone.wp >> log_sectors_per_block);
wp_segno = GET_SEGNO(sbi, wp_block);
wp_blkoff = wp_block - START_BLOCK(sbi, wp_segno);
wp_sector_off = zone.wp & GENMASK(log_sectors_per_block - 1, 0);
if (cs->segno == wp_segno && cs->next_blkoff == wp_blkoff &&
wp_sector_off == 0)
return 0;
f2fs_notice(sbi, "Unaligned curseg[%d] with write pointer: "
"curseg[0x%x,0x%x] wp[0x%x,0x%x]", type, cs->segno,
cs->next_blkoff, wp_segno, wp_blkoff);
}
/* Allocate a new section if it's not new. */
if (cs->next_blkoff ||
cs->segno != GET_SEG_FROM_SEC(sbi, GET_ZONE_FROM_SEC(sbi, cs_section))) {
unsigned int old_segno = cs->segno, old_blkoff = cs->next_blkoff;
f2fs_allocate_new_section(sbi, type, true);
f2fs_notice(sbi, "Assign new section to curseg[%d]: "
"[0x%x,0x%x] -> [0x%x,0x%x]",
type, old_segno, old_blkoff,
cs->segno, cs->next_blkoff);
}
/* check consistency of the zone curseg pointed to */
if (check_zone_write_pointer(sbi, zbd, &zone))
return -EIO;
/* check newly assigned zone */
cs_section = GET_SEC_FROM_SEG(sbi, cs->segno);
cs_zone_block = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, cs_section));
zbd = get_target_zoned_dev(sbi, cs_zone_block);
if (!zbd)
return 0;
zone_sector = (sector_t)(cs_zone_block - zbd->start_blk)
<< log_sectors_per_block;
err = blkdev_report_zones(zbd->bdev, zone_sector, 1,
report_one_zone_cb, &zone);
if (err != 1) {
f2fs_err(sbi, "Report zone failed: %s errno=(%d)",
zbd->path, err);
return err;
}
if (zone.type != BLK_ZONE_TYPE_SEQWRITE_REQ)
return 0;
if (zone.wp != zone.start) {
f2fs_notice(sbi,
"New zone for curseg[%d] is not yet discarded. "
"Reset the zone: curseg[0x%x,0x%x]",
type, cs->segno, cs->next_blkoff);
err = __f2fs_issue_discard_zone(sbi, zbd->bdev, cs_zone_block,
zone.len >> log_sectors_per_block);
if (err) {
f2fs_err(sbi, "Discard zone failed: %s (errno=%d)",
zbd->path, err);
return err;
}
}
return 0;
}
int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
{
int i, ret;
for (i = 0; i < NR_PERSISTENT_LOG; i++) {
ret = fix_curseg_write_pointer(sbi, i);
if (ret)
return ret;
}
return 0;
}
struct check_zone_write_pointer_args {
struct f2fs_sb_info *sbi;
struct f2fs_dev_info *fdev;
};
static int check_zone_write_pointer_cb(struct blk_zone *zone, unsigned int idx,
void *data)
{
struct check_zone_write_pointer_args *args;
args = (struct check_zone_write_pointer_args *)data;
return check_zone_write_pointer(args->sbi, args->fdev, zone);
}
int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
{
int i, ret;
struct check_zone_write_pointer_args args;
for (i = 0; i < sbi->s_ndevs; i++) {
if (!bdev_is_zoned(FDEV(i).bdev))
continue;
args.sbi = sbi;
args.fdev = &FDEV(i);
ret = blkdev_report_zones(FDEV(i).bdev, 0, BLK_ALL_ZONES,
check_zone_write_pointer_cb, &args);
if (ret < 0)
return ret;
}
return 0;
}
/*
* Return the number of usable blocks in a segment. The number of blocks
* returned is always equal to the number of blocks in a segment for
* segments fully contained within a sequential zone capacity or a
* conventional zone. For segments partially contained in a sequential
* zone capacity, the number of usable blocks up to the zone capacity
* is returned. 0 is returned in all other cases.
*/
static inline unsigned int f2fs_usable_zone_blks_in_seg(
struct f2fs_sb_info *sbi, unsigned int segno)
{
block_t seg_start, sec_start_blkaddr, sec_cap_blkaddr;
unsigned int secno;
if (!sbi->unusable_blocks_per_sec)
return BLKS_PER_SEG(sbi);
secno = GET_SEC_FROM_SEG(sbi, segno);
seg_start = START_BLOCK(sbi, segno);
sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno));
sec_cap_blkaddr = sec_start_blkaddr + CAP_BLKS_PER_SEC(sbi);
/*
* If segment starts before zone capacity and spans beyond
* zone capacity, then usable blocks are from seg start to
* zone capacity. If the segment starts after the zone capacity,
* then there are no usable blocks.
*/
if (seg_start >= sec_cap_blkaddr)
return 0;
if (seg_start + BLKS_PER_SEG(sbi) > sec_cap_blkaddr)
return sec_cap_blkaddr - seg_start;
return BLKS_PER_SEG(sbi);
}
#else
int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
{
return 0;
}
int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
{
return 0;
}
static inline unsigned int f2fs_usable_zone_blks_in_seg(struct f2fs_sb_info *sbi,
unsigned int segno)
{
return 0;
}
#endif
unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
unsigned int segno)
{
if (f2fs_sb_has_blkzoned(sbi))
return f2fs_usable_zone_blks_in_seg(sbi, segno);
return BLKS_PER_SEG(sbi);
}
unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
unsigned int segno)
{
if (f2fs_sb_has_blkzoned(sbi))
return CAP_SEGS_PER_SEC(sbi);
return SEGS_PER_SEC(sbi);
}
/*
* Update min, max modified time for cost-benefit GC algorithm
*/
static void init_min_max_mtime(struct f2fs_sb_info *sbi)
{
struct sit_info *sit_i = SIT_I(sbi);
unsigned int segno;
down_write(&sit_i->sentry_lock);
sit_i->min_mtime = ULLONG_MAX;
for (segno = 0; segno < MAIN_SEGS(sbi); segno += SEGS_PER_SEC(sbi)) {
unsigned int i;
unsigned long long mtime = 0;
for (i = 0; i < SEGS_PER_SEC(sbi); i++)
mtime += get_seg_entry(sbi, segno + i)->mtime;
mtime = div_u64(mtime, SEGS_PER_SEC(sbi));
if (sit_i->min_mtime > mtime)
sit_i->min_mtime = mtime;
}
sit_i->max_mtime = get_mtime(sbi, false);
sit_i->dirty_max_mtime = 0;
up_write(&sit_i->sentry_lock);
}
int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
{
struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
struct f2fs_sm_info *sm_info;
int err;
sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL);
if (!sm_info)
return -ENOMEM;
/* init sm info */
sbi->sm_info = sm_info;
sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
sm_info->segment_count = le32_to_cpu(raw_super->segment_count);
sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main);
sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
sm_info->rec_prefree_segments = sm_info->main_segments *
DEF_RECLAIM_PREFREE_SEGMENTS / 100;
if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
if (!f2fs_lfs_mode(sbi))
sm_info->ipu_policy = BIT(F2FS_IPU_FSYNC);
sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
sm_info->min_seq_blocks = BLKS_PER_SEG(sbi);
sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS;
sm_info->min_ssr_sections = reserved_sections(sbi);
INIT_LIST_HEAD(&sm_info->sit_entry_set);
init_f2fs_rwsem(&sm_info->curseg_lock);
err = f2fs_create_flush_cmd_control(sbi);
if (err)
return err;
err = create_discard_cmd_control(sbi);
if (err)
return err;
err = build_sit_info(sbi);
if (err)
return err;
err = build_free_segmap(sbi);
if (err)
return err;
err = build_curseg(sbi);
if (err)
return err;
/* reinit free segmap based on SIT */
err = build_sit_entries(sbi);
if (err)
return err;
init_free_segmap(sbi);
err = build_dirty_segmap(sbi);
if (err)
return err;
err = sanity_check_curseg(sbi);
if (err)
return err;
init_min_max_mtime(sbi);
return 0;
}
static void discard_dirty_segmap(struct f2fs_sb_info *sbi,
enum dirty_type dirty_type)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
mutex_lock(&dirty_i->seglist_lock);
kvfree(dirty_i->dirty_segmap[dirty_type]);
dirty_i->nr_dirty[dirty_type] = 0;
mutex_unlock(&dirty_i->seglist_lock);
}
static void destroy_victim_secmap(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
kvfree(dirty_i->pinned_secmap);
kvfree(dirty_i->victim_secmap);
}
static void destroy_dirty_segmap(struct f2fs_sb_info *sbi)
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
int i;
if (!dirty_i)
return;
/* discard pre-free/dirty segments list */
for (i = 0; i < NR_DIRTY_TYPE; i++)
discard_dirty_segmap(sbi, i);
if (__is_large_section(sbi)) {
mutex_lock(&dirty_i->seglist_lock);
kvfree(dirty_i->dirty_secmap);
mutex_unlock(&dirty_i->seglist_lock);
}
destroy_victim_secmap(sbi);
SM_I(sbi)->dirty_info = NULL;
kfree(dirty_i);
}
static void destroy_curseg(struct f2fs_sb_info *sbi)
{
struct curseg_info *array = SM_I(sbi)->curseg_array;
int i;
if (!array)
return;
SM_I(sbi)->curseg_array = NULL;
for (i = 0; i < NR_CURSEG_TYPE; i++) {
kfree(array[i].sum_blk);
kfree(array[i].journal);
}
kfree(array);
}
static void destroy_free_segmap(struct f2fs_sb_info *sbi)
{
struct free_segmap_info *free_i = SM_I(sbi)->free_info;
if (!free_i)
return;
SM_I(sbi)->free_info = NULL;
kvfree(free_i->free_segmap);
kvfree(free_i->free_secmap);
kfree(free_i);
}
static void destroy_sit_info(struct f2fs_sb_info *sbi)
{
struct sit_info *sit_i = SIT_I(sbi);
if (!sit_i)
return;
if (sit_i->sentries)
kvfree(sit_i->bitmap);
kfree(sit_i->tmp_map);
kvfree(sit_i->sentries);
kvfree(sit_i->sec_entries);
kvfree(sit_i->dirty_sentries_bitmap);
SM_I(sbi)->sit_info = NULL;
kvfree(sit_i->sit_bitmap);
#ifdef CONFIG_F2FS_CHECK_FS
kvfree(sit_i->sit_bitmap_mir);
kvfree(sit_i->invalid_segmap);
#endif
kfree(sit_i);
}
void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
if (!sm_info)
return;
f2fs_destroy_flush_cmd_control(sbi, true);
destroy_discard_cmd_control(sbi);
destroy_dirty_segmap(sbi);
destroy_curseg(sbi);
destroy_free_segmap(sbi);
destroy_sit_info(sbi);
sbi->sm_info = NULL;
kfree(sm_info);
}
int __init f2fs_create_segment_manager_caches(void)
{
discard_entry_slab = f2fs_kmem_cache_create("f2fs_discard_entry",
sizeof(struct discard_entry));
if (!discard_entry_slab)
goto fail;
discard_cmd_slab = f2fs_kmem_cache_create("f2fs_discard_cmd",
sizeof(struct discard_cmd));
if (!discard_cmd_slab)
goto destroy_discard_entry;
sit_entry_set_slab = f2fs_kmem_cache_create("f2fs_sit_entry_set",
sizeof(struct sit_entry_set));
if (!sit_entry_set_slab)
goto destroy_discard_cmd;
revoke_entry_slab = f2fs_kmem_cache_create("f2fs_revoke_entry",
sizeof(struct revoke_entry));
if (!revoke_entry_slab)
goto destroy_sit_entry_set;
return 0;
destroy_sit_entry_set:
kmem_cache_destroy(sit_entry_set_slab);
destroy_discard_cmd:
kmem_cache_destroy(discard_cmd_slab);
destroy_discard_entry:
kmem_cache_destroy(discard_entry_slab);
fail:
return -ENOMEM;
}
void f2fs_destroy_segment_manager_caches(void)
{
kmem_cache_destroy(sit_entry_set_slab);
kmem_cache_destroy(discard_cmd_slab);
kmem_cache_destroy(discard_entry_slab);
kmem_cache_destroy(revoke_entry_slab);
}
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