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Subjectlinux-next: btrfs merge resolution
Hi all,

Since the block tree has been merged into Linus' tree, here is the
merge resolution from my merge of the btrfs-kdave tree today:

36c639d65d6a6e596d73ccf285adf9fffc9097b8
diff --cc fs/btrfs/disk-io.c
index 6036d15b47b8,b6758892874f..7065201bedcf
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@@ -87,9 -87,8 +87,8 @@@ struct btrfs_end_io_wq
bio_end_io_t *end_io;
void *private;
struct btrfs_fs_info *info;
- int error;
+ blk_status_t status;
enum btrfs_wq_endio_type metadata;
- struct list_head list;
struct btrfs_work work;
};

@@@ -868,10 -867,10 +867,10 @@@ unsigned long btrfs_async_submit_limit(
static void run_one_async_start(struct btrfs_work *work)
{
struct async_submit_bio *async;
- int ret;
+ blk_status_t ret;

async = container_of(work, struct async_submit_bio, work);
- ret = async->submit_bio_start(async->inode, async->bio,
+ ret = async->submit_bio_start(async->private_data, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
if (ret)
@@@ -916,19 -915,20 +915,20 @@@ static void run_one_async_free(struct b
kfree(async);
}

- blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info,
- struct inode *inode, struct bio *bio, int mirror_num,
- unsigned long bio_flags, u64 bio_offset,
- extent_submit_bio_hook_t *submit_bio_start,
- extent_submit_bio_hook_t *submit_bio_done)
-int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
++blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset, void *private_data,
+ extent_submit_bio_hook_t *submit_bio_start,
+ extent_submit_bio_hook_t *submit_bio_done)
{
struct async_submit_bio *async;

async = kmalloc(sizeof(*async), GFP_NOFS);
if (!async)
- return -ENOMEM;
+ return BLK_STS_RESOURCE;

- async->inode = inode;
+ async->private_data = private_data;
+ async->fs_info = fs_info;
async->bio = bio;
async->mirror_num = mirror_num;
async->submit_bio_start = submit_bio_start;
@@@ -971,12 -971,12 +971,12 @@@ static blk_status_t btree_csum_one_bio(
break;
}

- return ret;
+ return errno_to_blk_status(ret);
}

- static blk_status_t __btree_submit_bio_start(struct inode *inode,
- struct bio *bio, int mirror_num, unsigned long bio_flags,
- u64 bio_offset)
-static int __btree_submit_bio_start(void *private_data, struct bio *bio,
++static blk_status_t __btree_submit_bio_start(void *private_data, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset)
{
/*
* when we're called for a write, we're already in the async
@@@ -985,11 -985,12 +985,12 @@@
return btree_csum_one_bio(bio);
}

- static blk_status_t __btree_submit_bio_done(struct inode *inode,
- struct bio *bio, int mirror_num, unsigned long bio_flags,
- u64 bio_offset)
-static int __btree_submit_bio_done(void *private_data, struct bio *bio,
++static blk_status_t __btree_submit_bio_done(void *private_data, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset)
{
+ struct inode *inode = private_data;
- int ret;
+ blk_status_t ret;

/*
* when we're called for a write, we're already in the async
@@@ -1014,13 -1015,14 +1015,14 @@@ static int check_async_write(unsigned l
return 1;
}

- static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio,
-static int btree_submit_bio_hook(void *private_data, struct bio *bio,
++static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
{
+ struct inode *inode = private_data;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
int async = check_async_write(bio_flags);
- int ret;
+ blk_status_t ret;

if (bio_op(bio) != REQ_OP_WRITE) {
/*
@@@ -3490,59 -3485,57 +3485,57 @@@ static void btrfs_end_empty_barrier(str
}

/*
- * trigger flushes for one the devices. If you pass wait == 0, the flushes are
- * sent down. With wait == 1, it waits for the previous flush.
- *
- * any device where the flush fails with eopnotsupp are flagged as not-barrier
- * capable
+ * Submit a flush request to the device if it supports it. Error handling is
+ * done in the waiting counterpart.
*/
- static blk_status_t write_dev_flush(struct btrfs_device *device, int wait)
+ static void write_dev_flush(struct btrfs_device *device)
{
struct request_queue *q = bdev_get_queue(device->bdev);
- struct bio *bio;
- blk_status_t ret = 0;
+ struct bio *bio = device->flush_bio;

if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags))
- return 0;
+ return;

- if (wait) {
- bio = device->flush_bio;
- if (!bio)
- return 0;
+ bio_reset(bio);
+ bio->bi_end_io = btrfs_end_empty_barrier;
+ bio->bi_bdev = device->bdev;
+ bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
+ init_completion(&device->flush_wait);
+ bio->bi_private = &device->flush_wait;

- wait_for_completion(&device->flush_wait);
+ submit_bio(bio);
+ device->flush_bio_sent = 1;
+ }

- if (bio->bi_status) {
- ret = bio->bi_status;
- btrfs_dev_stat_inc_and_print(device,
- BTRFS_DEV_STAT_FLUSH_ERRS);
- }
+ /*
+ * If the flush bio has been submitted by write_dev_flush, wait for it.
+ */
-static int wait_dev_flush(struct btrfs_device *device)
++static blk_status_t wait_dev_flush(struct btrfs_device *device)
+ {
+ struct bio *bio = device->flush_bio;

- /* drop the reference from the wait == 0 run */
- bio_put(bio);
- device->flush_bio = NULL;
+ if (!device->flush_bio_sent)
+ return 0;

- return ret;
- }
+ device->flush_bio_sent = 0;
+ wait_for_completion_io(&device->flush_wait);

- /*
- * one reference for us, and we leave it for the
- * caller
- */
- device->flush_bio = NULL;
- bio = btrfs_io_bio_alloc(GFP_NOFS, 0);
- if (!bio)
- return BLK_STS_RESOURCE;
- return bio->bi_error;
++ return bio->bi_status;
+ }

- bio->bi_end_io = btrfs_end_empty_barrier;
- bio->bi_bdev = device->bdev;
- bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
- init_completion(&device->flush_wait);
- bio->bi_private = &device->flush_wait;
- device->flush_bio = bio;
+ static int check_barrier_error(struct btrfs_fs_devices *fsdevs)
+ {
+ int dev_flush_error = 0;
+ struct btrfs_device *dev;

- bio_get(bio);
- btrfsic_submit_bio(bio);
+ list_for_each_entry_rcu(dev, &fsdevs->devices, dev_list) {
+ if (!dev->bdev || dev->last_flush_error)
+ dev_flush_error++;
+ }
+
+ if (dev_flush_error >
+ fsdevs->fs_info->num_tolerated_disk_barrier_failures)
+ return -EIO;

return 0;
}
@@@ -3555,9 -3548,8 +3548,8 @@@ static int barrier_all_devices(struct b
{
struct list_head *head;
struct btrfs_device *dev;
- int errors_send = 0;
int errors_wait = 0;
- int ret;
+ blk_status_t ret;

/* send down all the barriers */
head = &info->fs_devices->devices;
diff --cc fs/btrfs/disk-io.h
index c581927555f3,4654d129aa76..0a634d3ffc16
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@@ -118,16 -118,16 +118,16 @@@ int btrfs_buffer_uptodate(struct extent
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
u32 btrfs_csum_data(const char *data, u32 seed, size_t len);
void btrfs_csum_final(u32 crc, u8 *result);
-int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
+blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
enum btrfs_wq_endio_type metadata);
- blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info,
- struct inode *inode, struct bio *bio, int mirror_num,
- unsigned long bio_flags, u64 bio_offset,
- extent_submit_bio_hook_t *submit_bio_start,
- extent_submit_bio_hook_t *submit_bio_done);
-int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
++blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset, void *private_data,
+ extent_submit_bio_hook_t *submit_bio_start,
+ extent_submit_bio_hook_t *submit_bio_done);
unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
int btrfs_write_tree_block(struct extent_buffer *buf);
- int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
+ void btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
diff --cc fs/btrfs/extent_io.c
index d1cd60140817,2e6f69908303..7a18b5762ac9
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@@ -2398,9 -2369,9 +2370,10 @@@ static int bio_readpage_error(struct bi
struct io_failure_record *failrec;
struct inode *inode = page->mapping->host;
struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
+ struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
struct bio *bio;
int read_mode = 0;
+ blk_status_t status;
int ret;

BUG_ON(bio_op(failed_bio) == REQ_OP_WRITE);
@@@ -2433,12 -2404,11 +2406,12 @@@
"Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d",
read_mode, failrec->this_mirror, failrec->in_validation);

- status = tree->ops->submit_bio_hook(inode, bio, failrec->this_mirror,
- ret = tree->ops->submit_bio_hook(tree->private_data, bio, failrec->this_mirror,
++ status = tree->ops->submit_bio_hook(tree->private_data, bio, failrec->this_mirror,
failrec->bio_flags, 0);
- if (ret) {
+ if (status) {
- free_io_failure(BTRFS_I(inode), failrec);
+ free_io_failure(failure_tree, tree, failrec);
bio_put(bio);
+ ret = blk_status_to_errno(status);
}

return ret;
@@@ -2540,9 -2509,9 +2513,9 @@@ endio_readpage_release_extent(struct ex
static void end_bio_extent_readpage(struct bio *bio)
{
struct bio_vec *bvec;
- int uptodate = !bio->bi_error;
+ int uptodate = !bio->bi_status;
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
- struct extent_io_tree *tree;
+ struct extent_io_tree *tree, *failure_tree;
u64 offset = 0;
u64 start;
u64 end;
@@@ -2560,9 -2529,10 +2533,10 @@@

btrfs_debug(fs_info,
"end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u",
- (u64)bio->bi_iter.bi_sector, bio->bi_error,
+ (u64)bio->bi_iter.bi_sector, bio->bi_status,
io_bio->mirror_num);
tree = &BTRFS_I(inode)->io_tree;
+ failure_tree = &BTRFS_I(inode)->io_failure_tree;

/* We always issue full-page reads, but if some block
* in a page fails to read, blk_update_request() will
diff --cc fs/btrfs/extent_io.h
index 487ca0207cb6,aeafdb35d90b..d4942d94a16b
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@@ -92,9 -92,9 +92,9 @@@ struct btrfs_inode
struct btrfs_io_bio;
struct io_failure_record;

- typedef blk_status_t (extent_submit_bio_hook_t)(struct inode *inode,
-typedef int (extent_submit_bio_hook_t)(void *private_data, struct bio *bio,
- int mirror_num, unsigned long bio_flags,
- u64 bio_offset);
++typedef blk_status_t (extent_submit_bio_hook_t)(void *private_data,
+ struct bio *bio, int mirror_num, unsigned long bio_flags,
+ u64 bio_offset);
struct extent_io_ops {
/*
* The following callbacks must be allways defined, the function
diff --cc fs/btrfs/inode.c
index 556c93060606,5d3c6ac960fd..8d050314591c
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@@ -1900,11 -1900,12 +1899,12 @@@ int btrfs_merge_bio_hook(struct page *p
* At IO completion time the cums attached on the ordered extent record
* are inserted into the btree
*/
- static blk_status_t __btrfs_submit_bio_start(struct inode *inode,
- struct bio *bio, int mirror_num, unsigned long bio_flags,
- u64 bio_offset)
-static int __btrfs_submit_bio_start(void *private_data, struct bio *bio,
++static blk_status_t __btrfs_submit_bio_start(void *private_data, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset)
{
+ struct inode *inode = private_data;
- int ret = 0;
+ blk_status_t ret = 0;

ret = btrfs_csum_one_bio(inode, bio, 0, 0);
BUG_ON(ret); /* -ENOMEM */
@@@ -1919,12 -1920,13 +1919,13 @@@
* At IO completion time the cums attached on the ordered extent record
* are inserted into the btree
*/
- static blk_status_t __btrfs_submit_bio_done(struct inode *inode,
- struct bio *bio, int mirror_num, unsigned long bio_flags,
- u64 bio_offset)
-static int __btrfs_submit_bio_done(void *private_data, struct bio *bio,
++static blk_status_t __btrfs_submit_bio_done(void *private_data, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset)
{
+ struct inode *inode = private_data;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
- int ret;
+ blk_status_t ret;

ret = btrfs_map_bio(fs_info, bio, mirror_num, 1);
if (ret) {
@@@ -1938,10 -1940,11 +1939,11 @@@
* extent_io.c submission hook. This does the right thing for csum calculation
* on write, or reading the csums from the tree before a read
*/
- static blk_status_t btrfs_submit_bio_hook(struct inode *inode, struct bio *bio,
- int mirror_num, unsigned long bio_flags,
- u64 bio_offset)
-static int btrfs_submit_bio_hook(void *private_data, struct bio *bio,
++static blk_status_t btrfs_submit_bio_hook(void *private_data, struct bio *bio,
+ int mirror_num, unsigned long bio_flags,
+ u64 bio_offset)
{
+ struct inode *inode = private_data;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct btrfs_root *root = BTRFS_I(inode)->root;
enum btrfs_wq_endio_type metadata = BTRFS_WQ_ENDIO_DATA;
@@@ -8033,10 -8046,12 +8045,12 @@@ struct btrfs_retry_complete
static void btrfs_retry_endio_nocsum(struct bio *bio)
{
struct btrfs_retry_complete *done = bio->bi_private;
+ struct inode *inode = done->inode;
struct bio_vec *bvec;
+ struct extent_io_tree *io_tree, *failure_tree;
int i;

- if (bio->bi_error)
+ if (bio->bi_status)
goto end;

ASSERT(bio->bi_vcnt == 1);
@@@ -8140,11 -8171,12 +8170,12 @@@ end
bio_put(bio);
}

-static int __btrfs_subio_endio_read(struct inode *inode,
- struct btrfs_io_bio *io_bio, int err)
+static blk_status_t __btrfs_subio_endio_read(struct inode *inode,
+ struct btrfs_io_bio *io_bio, blk_status_t err)
{
struct btrfs_fs_info *fs_info;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
struct btrfs_retry_complete done;
u64 start;
u64 offset = 0;
@@@ -8231,10 -8265,13 +8264,13 @@@ static void btrfs_endio_direct_read(str
struct inode *inode = dip->inode;
struct bio *dio_bio;
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
- int err = bio->bi_error;
+ blk_status_t err = bio->bi_status;

- if (dip->flags & BTRFS_DIO_ORIG_BIO_SUBMITTED)
+ if (dip->flags & BTRFS_DIO_ORIG_BIO_SUBMITTED) {
err = btrfs_subio_endio_read(inode, io_bio, err);
+ if (!err)
- bio->bi_error = 0;
++ bio->bi_status = 0;
+ }

unlock_extent(&BTRFS_I(inode)->io_tree, dip->logical_offset,
dip->logical_offset + dip->bytes - 1);
@@@ -8307,11 -8344,12 +8343,12 @@@ static void btrfs_endio_direct_write(st
bio_put(bio);
}

- static blk_status_t __btrfs_submit_bio_start_direct_io(struct inode *inode,
-static int __btrfs_submit_bio_start_direct_io(void *private_data,
++static blk_status_t __btrfs_submit_bio_start_direct_io(void *private_data,
struct bio *bio, int mirror_num,
unsigned long bio_flags, u64 offset)
{
+ struct inode *inode = private_data;
- int ret;
+ blk_status_t ret;
ret = btrfs_csum_one_bio(inode, bio, offset, 1);
BUG_ON(ret); /* -ENOMEM */
return 0;
@@@ -8357,17 -8395,7 +8394,7 @@@ out
bio_put(bio);
}

- static struct bio *btrfs_dio_bio_alloc(struct block_device *bdev,
- u64 first_sector, gfp_t gfp_flags)
- {
- struct bio *bio;
- bio = btrfs_bio_alloc(bdev, first_sector, BIO_MAX_PAGES, gfp_flags);
- if (bio)
- bio_associate_current(bio);
- return bio;
- }
-static inline int btrfs_lookup_and_bind_dio_csum(struct inode *inode,
+static inline blk_status_t btrfs_lookup_and_bind_dio_csum(struct inode *inode,
struct btrfs_dio_private *dip,
struct bio *bio,
u64 file_offset)
@@@ -8672,10 -8675,10 +8674,10 @@@ free_ordered
* Releases and cleans up our dio_bio, no need to bio_put()
* nor bio_endio()/bio_io_error() against dio_bio.
*/
- dio_end_io(dio_bio, ret);
+ dio_end_io(dio_bio);
}
- if (io_bio)
- bio_put(io_bio);
+ if (bio)
+ bio_put(bio);
kfree(dip);
}

@@@ -8754,11 -8758,9 +8757,12 @@@ static ssize_t btrfs_direct_IO(struct k
dio_data.overwrite = 1;
inode_unlock(inode);
relock = true;
+ } else if (iocb->ki_flags & IOCB_NOWAIT) {
+ ret = -EAGAIN;
+ goto out;
}
- ret = btrfs_delalloc_reserve_space(inode, offset, count);
+ ret = btrfs_delalloc_reserve_space(inode, &data_reserved,
+ offset, count);
if (ret)
goto out;
dio_data.outstanding_extents = count_max_extents(count);

--
Cheers,
Stephen Rothwell

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