mirror of
https://github.com/torvalds/linux.git
synced 2025-10-31 16:48:26 +02:00
btrfs: scrub: remove the old writeback infrastructure
Since the whole scrub path has been switched to scrub_stripe based solution, the old writeback path can be removed completely, which involves: - scrub_ctx::wr_curr_bio member - scrub_ctx::flush_all_writes member - function scrub_write_block_to_dev_replace() - function scrub_write_sector_to_dev_replace() - function scrub_add_sector_to_wr_bio() - function scrub_wr_submit() - function scrub_wr_bio_end_io() - function scrub_wr_bio_end_io_worker() And one more function needs to be exported temporarily: - scrub_sector_get() Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo
David Sterba
parent
5dc96f8d5d
commit
16f9399349
2 changed files with 3 additions and 219 deletions
221
fs/btrfs/scrub.c
221
fs/btrfs/scrub.c
|
|
@ -275,10 +275,8 @@ struct scrub_ctx {
|
|||
int is_dev_replace;
|
||||
u64 write_pointer;
|
||||
|
||||
struct scrub_bio *wr_curr_bio;
|
||||
struct mutex wr_lock;
|
||||
struct btrfs_device *wr_tgtdev;
|
||||
bool flush_all_writes;
|
||||
|
||||
/*
|
||||
* statistics
|
||||
|
|
@ -547,23 +545,14 @@ static int scrub_repair_block_from_good_copy(struct scrub_block *sblock_bad,
|
|||
static int scrub_repair_sector_from_good_copy(struct scrub_block *sblock_bad,
|
||||
struct scrub_block *sblock_good,
|
||||
int sector_num, int force_write);
|
||||
static void scrub_write_block_to_dev_replace(struct scrub_block *sblock);
|
||||
static int scrub_write_sector_to_dev_replace(struct scrub_block *sblock,
|
||||
int sector_num);
|
||||
static int scrub_checksum_data(struct scrub_block *sblock);
|
||||
static int scrub_checksum_tree_block(struct scrub_block *sblock);
|
||||
static int scrub_checksum_super(struct scrub_block *sblock);
|
||||
static void scrub_block_put(struct scrub_block *sblock);
|
||||
static void scrub_sector_get(struct scrub_sector *sector);
|
||||
static void scrub_sector_put(struct scrub_sector *sector);
|
||||
static void scrub_bio_end_io(struct bio *bio);
|
||||
static void scrub_bio_end_io_worker(struct work_struct *work);
|
||||
static void scrub_block_complete(struct scrub_block *sblock);
|
||||
static int scrub_add_sector_to_wr_bio(struct scrub_ctx *sctx,
|
||||
struct scrub_sector *sector);
|
||||
static void scrub_wr_submit(struct scrub_ctx *sctx);
|
||||
static void scrub_wr_bio_end_io(struct bio *bio);
|
||||
static void scrub_wr_bio_end_io_worker(struct work_struct *work);
|
||||
static void scrub_put_ctx(struct scrub_ctx *sctx);
|
||||
|
||||
static inline int scrub_is_page_on_raid56(struct scrub_sector *sector)
|
||||
|
|
@ -872,7 +861,6 @@ static noinline_for_stack void scrub_free_ctx(struct scrub_ctx *sctx)
|
|||
for (i = 0; i < SCRUB_STRIPES_PER_SCTX; i++)
|
||||
release_scrub_stripe(&sctx->stripes[i]);
|
||||
|
||||
kfree(sctx->wr_curr_bio);
|
||||
scrub_free_csums(sctx);
|
||||
kfree(sctx);
|
||||
}
|
||||
|
|
@ -934,13 +922,10 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx(
|
|||
init_waitqueue_head(&sctx->list_wait);
|
||||
sctx->throttle_deadline = 0;
|
||||
|
||||
WARN_ON(sctx->wr_curr_bio != NULL);
|
||||
mutex_init(&sctx->wr_lock);
|
||||
sctx->wr_curr_bio = NULL;
|
||||
if (is_dev_replace) {
|
||||
WARN_ON(!fs_info->dev_replace.tgtdev);
|
||||
sctx->wr_tgtdev = fs_info->dev_replace.tgtdev;
|
||||
sctx->flush_all_writes = false;
|
||||
}
|
||||
|
||||
return sctx;
|
||||
|
|
@ -1304,8 +1289,6 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
|
|||
sblock_to_check->data_corrected = 1;
|
||||
spin_unlock(&sctx->stat_lock);
|
||||
|
||||
if (sctx->is_dev_replace)
|
||||
scrub_write_block_to_dev_replace(sblock_bad);
|
||||
goto out;
|
||||
}
|
||||
|
||||
|
|
@ -1394,7 +1377,6 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
|
|||
!sblock_other->checksum_error &&
|
||||
sblock_other->no_io_error_seen) {
|
||||
if (sctx->is_dev_replace) {
|
||||
scrub_write_block_to_dev_replace(sblock_other);
|
||||
goto corrected_error;
|
||||
} else {
|
||||
ret = scrub_repair_block_from_good_copy(
|
||||
|
|
@ -1476,13 +1458,6 @@ static int scrub_handle_errored_block(struct scrub_block *sblock_to_check)
|
|||
*/
|
||||
if (!sblock_other)
|
||||
sblock_other = sblock_bad;
|
||||
|
||||
if (scrub_write_sector_to_dev_replace(sblock_other,
|
||||
sector_num) != 0) {
|
||||
atomic64_inc(
|
||||
&fs_info->dev_replace.num_write_errors);
|
||||
success = 0;
|
||||
}
|
||||
} else if (sblock_other) {
|
||||
ret = scrub_repair_sector_from_good_copy(sblock_bad,
|
||||
sblock_other,
|
||||
|
|
@ -1904,31 +1879,6 @@ static int scrub_repair_sector_from_good_copy(struct scrub_block *sblock_bad,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void scrub_write_block_to_dev_replace(struct scrub_block *sblock)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = sblock->sctx->fs_info;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < sblock->sector_count; i++) {
|
||||
int ret;
|
||||
|
||||
ret = scrub_write_sector_to_dev_replace(sblock, i);
|
||||
if (ret)
|
||||
atomic64_inc(&fs_info->dev_replace.num_write_errors);
|
||||
}
|
||||
}
|
||||
|
||||
static int scrub_write_sector_to_dev_replace(struct scrub_block *sblock, int sector_num)
|
||||
{
|
||||
const u32 sectorsize = sblock->sctx->fs_info->sectorsize;
|
||||
struct scrub_sector *sector = sblock->sectors[sector_num];
|
||||
|
||||
if (sector->io_error)
|
||||
memset(scrub_sector_get_kaddr(sector), 0, sectorsize);
|
||||
|
||||
return scrub_add_sector_to_wr_bio(sblock->sctx, sector);
|
||||
}
|
||||
|
||||
static int fill_writer_pointer_gap(struct scrub_ctx *sctx, u64 physical)
|
||||
{
|
||||
int ret = 0;
|
||||
|
|
@ -1956,150 +1906,6 @@ static void scrub_block_get(struct scrub_block *sblock)
|
|||
refcount_inc(&sblock->refs);
|
||||
}
|
||||
|
||||
static int scrub_add_sector_to_wr_bio(struct scrub_ctx *sctx,
|
||||
struct scrub_sector *sector)
|
||||
{
|
||||
struct scrub_block *sblock = sector->sblock;
|
||||
struct scrub_bio *sbio;
|
||||
int ret;
|
||||
const u32 sectorsize = sctx->fs_info->sectorsize;
|
||||
|
||||
mutex_lock(&sctx->wr_lock);
|
||||
again:
|
||||
if (!sctx->wr_curr_bio) {
|
||||
sctx->wr_curr_bio = kzalloc(sizeof(*sctx->wr_curr_bio),
|
||||
GFP_KERNEL);
|
||||
if (!sctx->wr_curr_bio) {
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
return -ENOMEM;
|
||||
}
|
||||
sctx->wr_curr_bio->sctx = sctx;
|
||||
sctx->wr_curr_bio->sector_count = 0;
|
||||
}
|
||||
sbio = sctx->wr_curr_bio;
|
||||
if (sbio->sector_count == 0) {
|
||||
ret = fill_writer_pointer_gap(sctx, sector->offset +
|
||||
sblock->physical_for_dev_replace);
|
||||
if (ret) {
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
sbio->physical = sblock->physical_for_dev_replace + sector->offset;
|
||||
sbio->logical = sblock->logical + sector->offset;
|
||||
sbio->dev = sctx->wr_tgtdev;
|
||||
if (!sbio->bio) {
|
||||
sbio->bio = bio_alloc(sbio->dev->bdev, sctx->sectors_per_bio,
|
||||
REQ_OP_WRITE, GFP_NOFS);
|
||||
}
|
||||
sbio->bio->bi_private = sbio;
|
||||
sbio->bio->bi_end_io = scrub_wr_bio_end_io;
|
||||
sbio->bio->bi_iter.bi_sector = sbio->physical >> 9;
|
||||
sbio->status = 0;
|
||||
} else if (sbio->physical + sbio->sector_count * sectorsize !=
|
||||
sblock->physical_for_dev_replace + sector->offset ||
|
||||
sbio->logical + sbio->sector_count * sectorsize !=
|
||||
sblock->logical + sector->offset) {
|
||||
scrub_wr_submit(sctx);
|
||||
goto again;
|
||||
}
|
||||
|
||||
ret = bio_add_scrub_sector(sbio->bio, sector, sectorsize);
|
||||
if (ret != sectorsize) {
|
||||
if (sbio->sector_count < 1) {
|
||||
bio_put(sbio->bio);
|
||||
sbio->bio = NULL;
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
return -EIO;
|
||||
}
|
||||
scrub_wr_submit(sctx);
|
||||
goto again;
|
||||
}
|
||||
|
||||
sbio->sectors[sbio->sector_count] = sector;
|
||||
scrub_sector_get(sector);
|
||||
/*
|
||||
* Since ssector no longer holds a page, but uses sblock::pages, we
|
||||
* have to ensure the sblock had not been freed before our write bio
|
||||
* finished.
|
||||
*/
|
||||
scrub_block_get(sector->sblock);
|
||||
|
||||
sbio->sector_count++;
|
||||
if (sbio->sector_count == sctx->sectors_per_bio)
|
||||
scrub_wr_submit(sctx);
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void scrub_wr_submit(struct scrub_ctx *sctx)
|
||||
{
|
||||
struct scrub_bio *sbio;
|
||||
|
||||
if (!sctx->wr_curr_bio)
|
||||
return;
|
||||
|
||||
sbio = sctx->wr_curr_bio;
|
||||
sctx->wr_curr_bio = NULL;
|
||||
scrub_pending_bio_inc(sctx);
|
||||
/* process all writes in a single worker thread. Then the block layer
|
||||
* orders the requests before sending them to the driver which
|
||||
* doubled the write performance on spinning disks when measured
|
||||
* with Linux 3.5 */
|
||||
btrfsic_check_bio(sbio->bio);
|
||||
submit_bio(sbio->bio);
|
||||
|
||||
if (btrfs_is_zoned(sctx->fs_info))
|
||||
sctx->write_pointer = sbio->physical + sbio->sector_count *
|
||||
sctx->fs_info->sectorsize;
|
||||
}
|
||||
|
||||
static void scrub_wr_bio_end_io(struct bio *bio)
|
||||
{
|
||||
struct scrub_bio *sbio = bio->bi_private;
|
||||
struct btrfs_fs_info *fs_info = sbio->dev->fs_info;
|
||||
|
||||
sbio->status = bio->bi_status;
|
||||
sbio->bio = bio;
|
||||
|
||||
INIT_WORK(&sbio->work, scrub_wr_bio_end_io_worker);
|
||||
queue_work(fs_info->scrub_wr_completion_workers, &sbio->work);
|
||||
}
|
||||
|
||||
static void scrub_wr_bio_end_io_worker(struct work_struct *work)
|
||||
{
|
||||
struct scrub_bio *sbio = container_of(work, struct scrub_bio, work);
|
||||
struct scrub_ctx *sctx = sbio->sctx;
|
||||
int i;
|
||||
|
||||
ASSERT(sbio->sector_count <= SCRUB_SECTORS_PER_BIO);
|
||||
if (sbio->status) {
|
||||
struct btrfs_dev_replace *dev_replace =
|
||||
&sbio->sctx->fs_info->dev_replace;
|
||||
|
||||
for (i = 0; i < sbio->sector_count; i++) {
|
||||
struct scrub_sector *sector = sbio->sectors[i];
|
||||
|
||||
sector->io_error = 1;
|
||||
atomic64_inc(&dev_replace->num_write_errors);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* In scrub_add_sector_to_wr_bio() we grab extra ref for sblock, now in
|
||||
* endio we should put the sblock.
|
||||
*/
|
||||
for (i = 0; i < sbio->sector_count; i++) {
|
||||
scrub_block_put(sbio->sectors[i]->sblock);
|
||||
scrub_sector_put(sbio->sectors[i]);
|
||||
}
|
||||
|
||||
bio_put(sbio->bio);
|
||||
kfree(sbio);
|
||||
scrub_pending_bio_dec(sctx);
|
||||
}
|
||||
|
||||
static int scrub_checksum(struct scrub_block *sblock)
|
||||
{
|
||||
u64 flags;
|
||||
|
|
@ -2904,7 +2710,7 @@ static void scrub_block_put(struct scrub_block *sblock)
|
|||
}
|
||||
}
|
||||
|
||||
static void scrub_sector_get(struct scrub_sector *sector)
|
||||
void scrub_sector_get(struct scrub_sector *sector)
|
||||
{
|
||||
atomic_inc(§or->refs);
|
||||
}
|
||||
|
|
@ -3105,21 +2911,12 @@ static void scrub_bio_end_io_worker(struct work_struct *work)
|
|||
sctx->first_free = sbio->index;
|
||||
spin_unlock(&sctx->list_lock);
|
||||
|
||||
if (sctx->is_dev_replace && sctx->flush_all_writes) {
|
||||
mutex_lock(&sctx->wr_lock);
|
||||
scrub_wr_submit(sctx);
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
}
|
||||
|
||||
scrub_pending_bio_dec(sctx);
|
||||
}
|
||||
|
||||
static void scrub_block_complete(struct scrub_block *sblock)
|
||||
{
|
||||
int corrupted = 0;
|
||||
|
||||
if (!sblock->no_io_error_seen) {
|
||||
corrupted = 1;
|
||||
scrub_handle_errored_block(sblock);
|
||||
} else {
|
||||
/*
|
||||
|
|
@ -3127,9 +2924,7 @@ static void scrub_block_complete(struct scrub_block *sblock)
|
|||
* dev replace case, otherwise write here in dev replace
|
||||
* case.
|
||||
*/
|
||||
corrupted = scrub_checksum(sblock);
|
||||
if (!corrupted && sblock->sctx->is_dev_replace)
|
||||
scrub_write_block_to_dev_replace(sblock);
|
||||
scrub_checksum(sblock);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -3904,14 +3699,11 @@ static int scrub_simple_mirror(struct scrub_ctx *sctx,
|
|||
/* Paused? */
|
||||
if (atomic_read(&fs_info->scrub_pause_req)) {
|
||||
/* Push queued extents */
|
||||
sctx->flush_all_writes = true;
|
||||
scrub_submit(sctx);
|
||||
mutex_lock(&sctx->wr_lock);
|
||||
scrub_wr_submit(sctx);
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
wait_event(sctx->list_wait,
|
||||
atomic_read(&sctx->bios_in_flight) == 0);
|
||||
sctx->flush_all_writes = false;
|
||||
scrub_blocked_if_needed(fs_info);
|
||||
}
|
||||
/* Block group removed? */
|
||||
|
|
@ -4048,7 +3840,6 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
|
|||
mutex_lock(&sctx->wr_lock);
|
||||
sctx->write_pointer = physical;
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
sctx->flush_all_writes = true;
|
||||
}
|
||||
|
||||
/* Prepare the extra data stripes used by RAID56. */
|
||||
|
|
@ -4159,9 +3950,6 @@ static noinline_for_stack int scrub_stripe(struct scrub_ctx *sctx,
|
|||
out:
|
||||
/* push queued extents */
|
||||
scrub_submit(sctx);
|
||||
mutex_lock(&sctx->wr_lock);
|
||||
scrub_wr_submit(sctx);
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
flush_scrub_stripes(sctx);
|
||||
if (sctx->raid56_data_stripes) {
|
||||
for (int i = 0; i < nr_data_stripes(map); i++)
|
||||
|
|
@ -4497,11 +4285,7 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
|
|||
* write requests are really completed when bios_in_flight
|
||||
* changes to 0.
|
||||
*/
|
||||
sctx->flush_all_writes = true;
|
||||
scrub_submit(sctx);
|
||||
mutex_lock(&sctx->wr_lock);
|
||||
scrub_wr_submit(sctx);
|
||||
mutex_unlock(&sctx->wr_lock);
|
||||
|
||||
wait_event(sctx->list_wait,
|
||||
atomic_read(&sctx->bios_in_flight) == 0);
|
||||
|
|
@ -4515,7 +4299,6 @@ int scrub_enumerate_chunks(struct scrub_ctx *sctx,
|
|||
*/
|
||||
wait_event(sctx->list_wait,
|
||||
atomic_read(&sctx->workers_pending) == 0);
|
||||
sctx->flush_all_writes = false;
|
||||
|
||||
scrub_pause_off(fs_info);
|
||||
|
||||
|
|
|
|||
|
|
@ -19,5 +19,6 @@ struct scrub_sector;
|
|||
int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum);
|
||||
int scrub_add_sector_to_rd_bio(struct scrub_ctx *sctx,
|
||||
struct scrub_sector *sector);
|
||||
void scrub_sector_get(struct scrub_sector *sector);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue