Commit b71a5e3f authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-4.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fix from David Sterba:
 "We have one more fixup that stems from the blk_status_t conversion
  that did not quite cover everything.

  The normal cases were not affected because the code is 0, but any
  error and retries could mix up new and old values"

* 'for-4.13-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  Btrfs: fix blk_status_t/errno confusion
parents 415be6c2 58efbc9f
...@@ -3516,7 +3516,7 @@ static blk_status_t wait_dev_flush(struct btrfs_device *device) ...@@ -3516,7 +3516,7 @@ static blk_status_t wait_dev_flush(struct btrfs_device *device)
struct bio *bio = device->flush_bio; struct bio *bio = device->flush_bio;
if (!device->flush_bio_sent) if (!device->flush_bio_sent)
return 0; return BLK_STS_OK;
device->flush_bio_sent = 0; device->flush_bio_sent = 0;
wait_for_completion_io(&device->flush_wait); wait_for_completion_io(&device->flush_wait);
...@@ -3563,7 +3563,7 @@ static int barrier_all_devices(struct btrfs_fs_info *info) ...@@ -3563,7 +3563,7 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
continue; continue;
write_dev_flush(dev); write_dev_flush(dev);
dev->last_flush_error = 0; dev->last_flush_error = BLK_STS_OK;
} }
/* wait for all the barriers */ /* wait for all the barriers */
......
...@@ -7924,11 +7924,12 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock, ...@@ -7924,11 +7924,12 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
return ret; return ret;
} }
static inline int submit_dio_repair_bio(struct inode *inode, struct bio *bio, static inline blk_status_t submit_dio_repair_bio(struct inode *inode,
int mirror_num) struct bio *bio,
int mirror_num)
{ {
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
int ret; blk_status_t ret;
BUG_ON(bio_op(bio) == REQ_OP_WRITE); BUG_ON(bio_op(bio) == REQ_OP_WRITE);
...@@ -7980,10 +7981,10 @@ static int btrfs_check_dio_repairable(struct inode *inode, ...@@ -7980,10 +7981,10 @@ static int btrfs_check_dio_repairable(struct inode *inode,
return 1; return 1;
} }
static int dio_read_error(struct inode *inode, struct bio *failed_bio, static blk_status_t dio_read_error(struct inode *inode, struct bio *failed_bio,
struct page *page, unsigned int pgoff, struct page *page, unsigned int pgoff,
u64 start, u64 end, int failed_mirror, u64 start, u64 end, int failed_mirror,
bio_end_io_t *repair_endio, void *repair_arg) bio_end_io_t *repair_endio, void *repair_arg)
{ {
struct io_failure_record *failrec; struct io_failure_record *failrec;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
...@@ -7993,18 +7994,19 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio, ...@@ -7993,18 +7994,19 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio,
int read_mode = 0; int read_mode = 0;
int segs; int segs;
int ret; int ret;
blk_status_t status;
BUG_ON(bio_op(failed_bio) == REQ_OP_WRITE); BUG_ON(bio_op(failed_bio) == REQ_OP_WRITE);
ret = btrfs_get_io_failure_record(inode, start, end, &failrec); ret = btrfs_get_io_failure_record(inode, start, end, &failrec);
if (ret) if (ret)
return ret; return errno_to_blk_status(ret);
ret = btrfs_check_dio_repairable(inode, failed_bio, failrec, ret = btrfs_check_dio_repairable(inode, failed_bio, failrec,
failed_mirror); failed_mirror);
if (!ret) { if (!ret) {
free_io_failure(failure_tree, io_tree, failrec); free_io_failure(failure_tree, io_tree, failrec);
return -EIO; return BLK_STS_IOERR;
} }
segs = bio_segments(failed_bio); segs = bio_segments(failed_bio);
...@@ -8022,13 +8024,13 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio, ...@@ -8022,13 +8024,13 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio,
"Repair DIO Read Error: submitting new dio read[%#x] to this_mirror=%d, in_validation=%d\n", "Repair DIO Read Error: submitting new dio read[%#x] to this_mirror=%d, in_validation=%d\n",
read_mode, failrec->this_mirror, failrec->in_validation); read_mode, failrec->this_mirror, failrec->in_validation);
ret = submit_dio_repair_bio(inode, bio, failrec->this_mirror); status = submit_dio_repair_bio(inode, bio, failrec->this_mirror);
if (ret) { if (status) {
free_io_failure(failure_tree, io_tree, failrec); free_io_failure(failure_tree, io_tree, failrec);
bio_put(bio); bio_put(bio);
} }
return ret; return status;
} }
struct btrfs_retry_complete { struct btrfs_retry_complete {
...@@ -8065,8 +8067,8 @@ static void btrfs_retry_endio_nocsum(struct bio *bio) ...@@ -8065,8 +8067,8 @@ static void btrfs_retry_endio_nocsum(struct bio *bio)
bio_put(bio); bio_put(bio);
} }
static int __btrfs_correct_data_nocsum(struct inode *inode, static blk_status_t __btrfs_correct_data_nocsum(struct inode *inode,
struct btrfs_io_bio *io_bio) struct btrfs_io_bio *io_bio)
{ {
struct btrfs_fs_info *fs_info; struct btrfs_fs_info *fs_info;
struct bio_vec bvec; struct bio_vec bvec;
...@@ -8076,8 +8078,8 @@ static int __btrfs_correct_data_nocsum(struct inode *inode, ...@@ -8076,8 +8078,8 @@ static int __btrfs_correct_data_nocsum(struct inode *inode,
unsigned int pgoff; unsigned int pgoff;
u32 sectorsize; u32 sectorsize;
int nr_sectors; int nr_sectors;
int ret; blk_status_t ret;
int err = 0; blk_status_t err = BLK_STS_OK;
fs_info = BTRFS_I(inode)->root->fs_info; fs_info = BTRFS_I(inode)->root->fs_info;
sectorsize = fs_info->sectorsize; sectorsize = fs_info->sectorsize;
...@@ -8183,11 +8185,12 @@ static blk_status_t __btrfs_subio_endio_read(struct inode *inode, ...@@ -8183,11 +8185,12 @@ static blk_status_t __btrfs_subio_endio_read(struct inode *inode,
int csum_pos; int csum_pos;
bool uptodate = (err == 0); bool uptodate = (err == 0);
int ret; int ret;
blk_status_t status;
fs_info = BTRFS_I(inode)->root->fs_info; fs_info = BTRFS_I(inode)->root->fs_info;
sectorsize = fs_info->sectorsize; sectorsize = fs_info->sectorsize;
err = 0; err = BLK_STS_OK;
start = io_bio->logical; start = io_bio->logical;
done.inode = inode; done.inode = inode;
io_bio->bio.bi_iter = io_bio->iter; io_bio->bio.bi_iter = io_bio->iter;
...@@ -8209,12 +8212,12 @@ static blk_status_t __btrfs_subio_endio_read(struct inode *inode, ...@@ -8209,12 +8212,12 @@ static blk_status_t __btrfs_subio_endio_read(struct inode *inode,
done.start = start; done.start = start;
init_completion(&done.done); init_completion(&done.done);
ret = dio_read_error(inode, &io_bio->bio, bvec.bv_page, status = dio_read_error(inode, &io_bio->bio, bvec.bv_page,
pgoff, start, start + sectorsize - 1, pgoff, start, start + sectorsize - 1,
io_bio->mirror_num, io_bio->mirror_num, btrfs_retry_endio,
btrfs_retry_endio, &done); &done);
if (ret) { if (status) {
err = errno_to_blk_status(ret); err = status;
goto next; goto next;
} }
...@@ -8250,7 +8253,7 @@ static blk_status_t btrfs_subio_endio_read(struct inode *inode, ...@@ -8250,7 +8253,7 @@ static blk_status_t btrfs_subio_endio_read(struct inode *inode,
if (unlikely(err)) if (unlikely(err))
return __btrfs_correct_data_nocsum(inode, io_bio); return __btrfs_correct_data_nocsum(inode, io_bio);
else else
return 0; return BLK_STS_OK;
} else { } else {
return __btrfs_subio_endio_read(inode, io_bio, err); return __btrfs_subio_endio_read(inode, io_bio, err);
} }
...@@ -8423,9 +8426,9 @@ static inline blk_status_t btrfs_lookup_and_bind_dio_csum(struct inode *inode, ...@@ -8423,9 +8426,9 @@ static inline blk_status_t btrfs_lookup_and_bind_dio_csum(struct inode *inode,
return 0; return 0;
} }
static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, static inline blk_status_t
u64 file_offset, int skip_sum, __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, u64 file_offset,
int async_submit) int skip_sum, int async_submit)
{ {
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct btrfs_dio_private *dip = bio->bi_private; struct btrfs_dio_private *dip = bio->bi_private;
...@@ -8488,6 +8491,7 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip, ...@@ -8488,6 +8491,7 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip,
int clone_offset = 0; int clone_offset = 0;
int clone_len; int clone_len;
int ret; int ret;
blk_status_t status;
map_length = orig_bio->bi_iter.bi_size; map_length = orig_bio->bi_iter.bi_size;
submit_len = map_length; submit_len = map_length;
...@@ -8537,9 +8541,9 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip, ...@@ -8537,9 +8541,9 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip,
*/ */
atomic_inc(&dip->pending_bios); atomic_inc(&dip->pending_bios);
ret = __btrfs_submit_dio_bio(bio, inode, file_offset, skip_sum, status = __btrfs_submit_dio_bio(bio, inode, file_offset, skip_sum,
async_submit); async_submit);
if (ret) { if (status) {
bio_put(bio); bio_put(bio);
atomic_dec(&dip->pending_bios); atomic_dec(&dip->pending_bios);
goto out_err; goto out_err;
...@@ -8557,9 +8561,9 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip, ...@@ -8557,9 +8561,9 @@ static int btrfs_submit_direct_hook(struct btrfs_dio_private *dip,
} while (submit_len > 0); } while (submit_len > 0);
submit: submit:
ret = __btrfs_submit_dio_bio(bio, inode, file_offset, skip_sum, status = __btrfs_submit_dio_bio(bio, inode, file_offset, skip_sum,
async_submit); async_submit);
if (!ret) if (!status)
return 0; return 0;
bio_put(bio); bio_put(bio);
......
...@@ -905,7 +905,7 @@ static void raid_write_end_io(struct bio *bio) ...@@ -905,7 +905,7 @@ static void raid_write_end_io(struct bio *bio)
if (!atomic_dec_and_test(&rbio->stripes_pending)) if (!atomic_dec_and_test(&rbio->stripes_pending))
return; return;
err = 0; err = BLK_STS_OK;
/* OK, we have read all the stripes we need to. */ /* OK, we have read all the stripes we need to. */
max_errors = (rbio->operation == BTRFS_RBIO_PARITY_SCRUB) ? max_errors = (rbio->operation == BTRFS_RBIO_PARITY_SCRUB) ?
...@@ -1324,7 +1324,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio) ...@@ -1324,7 +1324,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio)
return; return;
cleanup: cleanup:
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
} }
/* /*
...@@ -1475,7 +1475,7 @@ static void raid_rmw_end_io(struct bio *bio) ...@@ -1475,7 +1475,7 @@ static void raid_rmw_end_io(struct bio *bio)
cleanup: cleanup:
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
} }
static void async_rmw_stripe(struct btrfs_raid_bio *rbio) static void async_rmw_stripe(struct btrfs_raid_bio *rbio)
...@@ -1579,7 +1579,7 @@ static int raid56_rmw_stripe(struct btrfs_raid_bio *rbio) ...@@ -1579,7 +1579,7 @@ static int raid56_rmw_stripe(struct btrfs_raid_bio *rbio)
return 0; return 0;
cleanup: cleanup:
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
return -EIO; return -EIO;
finish: finish:
...@@ -1795,12 +1795,12 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) ...@@ -1795,12 +1795,12 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
void **pointers; void **pointers;
int faila = -1, failb = -1; int faila = -1, failb = -1;
struct page *page; struct page *page;
int err; blk_status_t err;
int i; int i;
pointers = kcalloc(rbio->real_stripes, sizeof(void *), GFP_NOFS); pointers = kcalloc(rbio->real_stripes, sizeof(void *), GFP_NOFS);
if (!pointers) { if (!pointers) {
err = -ENOMEM; err = BLK_STS_RESOURCE;
goto cleanup_io; goto cleanup_io;
} }
...@@ -1856,7 +1856,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) ...@@ -1856,7 +1856,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
* a bad data or Q stripe. * a bad data or Q stripe.
* TODO, we should redo the xor here. * TODO, we should redo the xor here.
*/ */
err = -EIO; err = BLK_STS_IOERR;
goto cleanup; goto cleanup;
} }
/* /*
...@@ -1882,7 +1882,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) ...@@ -1882,7 +1882,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
if (rbio->bbio->raid_map[failb] == RAID6_Q_STRIPE) { if (rbio->bbio->raid_map[failb] == RAID6_Q_STRIPE) {
if (rbio->bbio->raid_map[faila] == if (rbio->bbio->raid_map[faila] ==
RAID5_P_STRIPE) { RAID5_P_STRIPE) {
err = -EIO; err = BLK_STS_IOERR;
goto cleanup; goto cleanup;
} }
/* /*
...@@ -1954,13 +1954,13 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) ...@@ -1954,13 +1954,13 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
} }
} }
err = 0; err = BLK_STS_OK;
cleanup: cleanup:
kfree(pointers); kfree(pointers);
cleanup_io: cleanup_io:
if (rbio->operation == BTRFS_RBIO_READ_REBUILD) { if (rbio->operation == BTRFS_RBIO_READ_REBUILD) {
if (err == 0) if (err == BLK_STS_OK)
cache_rbio_pages(rbio); cache_rbio_pages(rbio);
else else
clear_bit(RBIO_CACHE_READY_BIT, &rbio->flags); clear_bit(RBIO_CACHE_READY_BIT, &rbio->flags);
...@@ -1968,7 +1968,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) ...@@ -1968,7 +1968,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio)
rbio_orig_end_io(rbio, err); rbio_orig_end_io(rbio, err);
} else if (rbio->operation == BTRFS_RBIO_REBUILD_MISSING) { } else if (rbio->operation == BTRFS_RBIO_REBUILD_MISSING) {
rbio_orig_end_io(rbio, err); rbio_orig_end_io(rbio, err);
} else if (err == 0) { } else if (err == BLK_STS_OK) {
rbio->faila = -1; rbio->faila = -1;
rbio->failb = -1; rbio->failb = -1;
...@@ -2005,7 +2005,7 @@ static void raid_recover_end_io(struct bio *bio) ...@@ -2005,7 +2005,7 @@ static void raid_recover_end_io(struct bio *bio)
return; return;
if (atomic_read(&rbio->error) > rbio->bbio->max_errors) if (atomic_read(&rbio->error) > rbio->bbio->max_errors)
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
else else
__raid_recover_end_io(rbio); __raid_recover_end_io(rbio);
} }
...@@ -2104,7 +2104,7 @@ static int __raid56_parity_recover(struct btrfs_raid_bio *rbio) ...@@ -2104,7 +2104,7 @@ static int __raid56_parity_recover(struct btrfs_raid_bio *rbio)
cleanup: cleanup:
if (rbio->operation == BTRFS_RBIO_READ_REBUILD || if (rbio->operation == BTRFS_RBIO_READ_REBUILD ||
rbio->operation == BTRFS_RBIO_REBUILD_MISSING) rbio->operation == BTRFS_RBIO_REBUILD_MISSING)
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
return -EIO; return -EIO;
} }
...@@ -2431,7 +2431,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio, ...@@ -2431,7 +2431,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
nr_data = bio_list_size(&bio_list); nr_data = bio_list_size(&bio_list);
if (!nr_data) { if (!nr_data) {
/* Every parity is right */ /* Every parity is right */
rbio_orig_end_io(rbio, 0); rbio_orig_end_io(rbio, BLK_STS_OK);
return; return;
} }
...@@ -2451,7 +2451,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio, ...@@ -2451,7 +2451,7 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
return; return;
cleanup: cleanup:
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
} }
static inline int is_data_stripe(struct btrfs_raid_bio *rbio, int stripe) static inline int is_data_stripe(struct btrfs_raid_bio *rbio, int stripe)
...@@ -2519,7 +2519,7 @@ static void validate_rbio_for_parity_scrub(struct btrfs_raid_bio *rbio) ...@@ -2519,7 +2519,7 @@ static void validate_rbio_for_parity_scrub(struct btrfs_raid_bio *rbio)
return; return;
cleanup: cleanup:
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
} }
/* /*
...@@ -2633,7 +2633,7 @@ static void raid56_parity_scrub_stripe(struct btrfs_raid_bio *rbio) ...@@ -2633,7 +2633,7 @@ static void raid56_parity_scrub_stripe(struct btrfs_raid_bio *rbio)
return; return;
cleanup: cleanup:
rbio_orig_end_io(rbio, -EIO); rbio_orig_end_io(rbio, BLK_STS_IOERR);
return; return;
finish: finish:
......
...@@ -6212,8 +6212,8 @@ static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical) ...@@ -6212,8 +6212,8 @@ static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
} }
} }
int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
int mirror_num, int async_submit) int mirror_num, int async_submit)
{ {
struct btrfs_device *dev; struct btrfs_device *dev;
struct bio *first_bio = bio; struct bio *first_bio = bio;
...@@ -6233,7 +6233,7 @@ int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, ...@@ -6233,7 +6233,7 @@ int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
&map_length, &bbio, mirror_num, 1); &map_length, &bbio, mirror_num, 1);
if (ret) { if (ret) {
btrfs_bio_counter_dec(fs_info); btrfs_bio_counter_dec(fs_info);
return ret; return errno_to_blk_status(ret);
} }
total_devs = bbio->num_stripes; total_devs = bbio->num_stripes;
...@@ -6256,7 +6256,7 @@ int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, ...@@ -6256,7 +6256,7 @@ int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
} }
btrfs_bio_counter_dec(fs_info); btrfs_bio_counter_dec(fs_info);
return ret; return errno_to_blk_status(ret);
} }
if (map_length < length) { if (map_length < length) {
...@@ -6283,7 +6283,7 @@ int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, ...@@ -6283,7 +6283,7 @@ int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
dev_nr, async_submit); dev_nr, async_submit);
} }
btrfs_bio_counter_dec(fs_info); btrfs_bio_counter_dec(fs_info);
return 0; return BLK_STS_OK;
} }
struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
......
...@@ -74,7 +74,7 @@ struct btrfs_device { ...@@ -74,7 +74,7 @@ struct btrfs_device {
int missing; int missing;
int can_discard; int can_discard;
int is_tgtdev_for_dev_replace; int is_tgtdev_for_dev_replace;
int last_flush_error; blk_status_t last_flush_error;
int flush_bio_sent; int flush_bio_sent;
#ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
...@@ -416,8 +416,8 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, ...@@ -416,8 +416,8 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 type); struct btrfs_fs_info *fs_info, u64 type);
void btrfs_mapping_init(struct btrfs_mapping_tree *tree); void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
int btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio, blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
int mirror_num, int async_submit); int mirror_num, int async_submit);
int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
fmode_t flags, void *holder); fmode_t flags, void *holder);
int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
......
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