btrfs_submit_dev_bio(bioc->stripes[dev_nr].dev, bio);
}
+static void __btrfs_submit_bio(struct bio *bio, struct btrfs_io_context *bioc,
+ struct btrfs_io_stripe *smap, int mirror_num)
+{
+ /* Do not leak our private flag into the block layer. */
+ bio->bi_opf &= ~REQ_BTRFS_ONE_ORDERED;
+
+ if (!bioc) {
+ /* Single mirror read/write fast path. */
+ btrfs_bio(bio)->mirror_num = mirror_num;
+ bio->bi_iter.bi_sector = smap->physical >> SECTOR_SHIFT;
+ bio->bi_private = smap->dev;
+ bio->bi_end_io = btrfs_simple_end_io;
+ btrfs_submit_dev_bio(smap->dev, bio);
+ } else if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
+ /* Parity RAID write or read recovery. */
+ bio->bi_private = bioc;
+ bio->bi_end_io = btrfs_raid56_end_io;
+ if (bio_op(bio) == REQ_OP_READ)
+ raid56_parity_recover(bio, bioc, mirror_num);
+ else
+ raid56_parity_write(bio, bioc);
+ } else {
+ /* Write to multiple mirrors. */
+ int total_devs = bioc->num_stripes;
+
+ bioc->orig_bio = bio;
+ for (int dev_nr = 0; dev_nr < total_devs; dev_nr++)
+ btrfs_submit_mirrored_bio(bioc, dev_nr);
+ }
+}
+
+static blk_status_t btrfs_bio_csum(struct btrfs_bio *bbio)
+{
+ if (bbio->bio.bi_opf & REQ_META)
+ return btree_csum_one_bio(&bbio->bio);
+ return btrfs_csum_one_bio(bbio);
+}
+
+/*
+ * Async submit bios are used to offload expensive checksumming onto the worker
+ * threads.
+ */
+struct async_submit_bio {
+ struct btrfs_bio *bbio;
+ struct btrfs_io_context *bioc;
+ struct btrfs_io_stripe smap;
+ int mirror_num;
+ struct btrfs_work work;
+};
+
+/*
+ * In order to insert checksums into the metadata in large chunks, we wait
+ * until bio submission time. All the pages in the bio are checksummed and
+ * sums are attached onto the ordered extent record.
+ *
+ * At IO completion time the csums attached on the ordered extent record are
+ * inserted into the btree.
+ */
+static void run_one_async_start(struct btrfs_work *work)
+{
+ struct async_submit_bio *async =
+ container_of(work, struct async_submit_bio, work);
+ blk_status_t ret;
+
+ ret = btrfs_bio_csum(async->bbio);
+ if (ret)
+ async->bbio->bio.bi_status = ret;
+}
+
+/*
+ * In order to insert checksums into the metadata in large chunks, we wait
+ * until bio submission time. All the pages in the bio are checksummed and
+ * sums are attached onto the ordered extent record.
+ *
+ * At IO completion time the csums attached on the ordered extent record are
+ * inserted into the tree.
+ */
+static void run_one_async_done(struct btrfs_work *work)
+{
+ struct async_submit_bio *async =
+ container_of(work, struct async_submit_bio, work);
+ struct bio *bio = &async->bbio->bio;
+
+ /* If an error occurred we just want to clean up the bio and move on. */
+ if (bio->bi_status) {
+ btrfs_bio_end_io(async->bbio, bio->bi_status);
+ return;
+ }
+
+ /*
+ * All of the bios that pass through here are from async helpers.
+ * Use REQ_CGROUP_PUNT to issue them from the owning cgroup's context.
+ * This changes nothing when cgroups aren't in use.
+ */
+ bio->bi_opf |= REQ_CGROUP_PUNT;
+ __btrfs_submit_bio(bio, async->bioc, &async->smap, async->mirror_num);
+}
+
+static void run_one_async_free(struct btrfs_work *work)
+{
+ kfree(container_of(work, struct async_submit_bio, work));
+}
+
+static bool should_async_write(struct btrfs_bio *bbio)
+{
+ /*
+ * If the I/O is not issued by fsync and friends, (->sync_writers != 0),
+ * then try to defer the submission to a workqueue to parallelize the
+ * checksum calculation.
+ */
+ if (atomic_read(&bbio->inode->sync_writers))
+ return false;
+
+ /*
+ * Submit metadata writes synchronously if the checksum implementation
+ * is fast, or we are on a zoned device that wants I/O to be submitted
+ * in order.
+ */
+ if (bbio->bio.bi_opf & REQ_META) {
+ struct btrfs_fs_info *fs_info = bbio->inode->root->fs_info;
+
+ if (btrfs_is_zoned(fs_info))
+ return false;
+ if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags))
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * Submit bio to an async queue.
+ *
+ * Return true if the work has been succesfuly submitted, else false.
+ */
+static bool btrfs_wq_submit_bio(struct btrfs_bio *bbio,
+ struct btrfs_io_context *bioc,
+ struct btrfs_io_stripe *smap, int mirror_num)
+{
+ struct btrfs_fs_info *fs_info = bbio->inode->root->fs_info;
+ struct async_submit_bio *async;
+
+ async = kmalloc(sizeof(*async), GFP_NOFS);
+ if (!async)
+ return false;
+
+ async->bbio = bbio;
+ async->bioc = bioc;
+ async->smap = *smap;
+ async->mirror_num = mirror_num;
+
+ btrfs_init_work(&async->work, run_one_async_start, run_one_async_done,
+ run_one_async_free);
+ if (op_is_sync(bbio->bio.bi_opf))
+ btrfs_queue_work(fs_info->hipri_workers, &async->work);
+ else
+ btrfs_queue_work(fs_info->workers, &async->work);
+ return true;
+}
+
void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror_num)
{
struct btrfs_bio *bbio = btrfs_bio(bio);
goto fail;
}
- /* Do not leak our private flag into the block layer. */
- bio->bi_opf &= ~REQ_BTRFS_ONE_ORDERED;
-
- if (!bioc) {
- /* Single mirror read/write fast path */
- bbio->mirror_num = mirror_num;
- bio->bi_iter.bi_sector = smap.physical >> SECTOR_SHIFT;
- bio->bi_private = smap.dev;
- bio->bi_end_io = btrfs_simple_end_io;
- btrfs_submit_dev_bio(smap.dev, bio);
- } else if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
- /* Parity RAID write or read recovery */
- bio->bi_private = bioc;
- bio->bi_end_io = btrfs_raid56_end_io;
- if (bio_op(bio) == REQ_OP_READ)
- raid56_parity_recover(bio, bioc, mirror_num);
- else
- raid56_parity_write(bio, bioc);
- } else {
- /* Write to multiple mirrors */
- int total_devs = bioc->num_stripes;
- int dev_nr;
-
- bioc->orig_bio = bio;
- for (dev_nr = 0; dev_nr < total_devs; dev_nr++)
- btrfs_submit_mirrored_bio(bioc, dev_nr);
+ if (btrfs_op(bio) == BTRFS_MAP_WRITE) {
+ /*
+ * Csum items for reloc roots have already been cloned at this
+ * point, so they are handled as part of the no-checksum case.
+ */
+ if (!(bbio->inode->flags & BTRFS_INODE_NODATASUM) &&
+ !test_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state) &&
+ !btrfs_is_data_reloc_root(bbio->inode->root)) {
+ if (should_async_write(bbio) &&
+ btrfs_wq_submit_bio(bbio, bioc, &smap, mirror_num))
+ return;
+
+ ret = btrfs_bio_csum(bbio);
+ if (ret)
+ goto fail;
+ }
}
+
+ __btrfs_submit_bio(bio, bioc, &smap, mirror_num);
return;
fail:
u64 cur_disk_bytenr = disk_start;
u64 next_stripe_start;
blk_status_t ret = BLK_STS_OK;
- int skip_sum = inode->flags & BTRFS_INODE_NODATASUM;
const bool use_append = btrfs_use_zone_append(inode, disk_start);
const enum req_op bio_op = REQ_BTRFS_ONE_ORDERED |
(use_append ? REQ_OP_ZONE_APPEND : REQ_OP_WRITE);
submit = true;
if (submit) {
- if (!skip_sum) {
- ret = btrfs_csum_one_bio(btrfs_bio(bio));
- if (ret) {
- btrfs_bio_end_io(btrfs_bio(bio), ret);
- break;
- }
- }
-
ASSERT(bio->bi_iter.bi_size);
btrfs_submit_bio(fs_info, bio, 0);
bio = NULL;
#include "relocation.h"
#include "scrub.h"
#include "super.h"
-#include "file-item.h"
#define BTRFS_SUPER_FLAG_SUPP (BTRFS_HEADER_FLAG_WRITTEN |\
BTRFS_HEADER_FLAG_RELOC |\
crypto_free_shash(fs_info->csum_shash);
}
-/*
- * async submit bios are used to offload expensive checksumming
- * onto the worker threads. They checksum file and metadata bios
- * just before they are sent down the IO stack.
- */
-struct async_submit_bio {
- struct btrfs_inode *inode;
- struct bio *bio;
- enum btrfs_wq_submit_cmd submit_cmd;
- int mirror_num;
-
- /* Optional parameter for used by direct io */
- u64 dio_file_offset;
- struct btrfs_work work;
- blk_status_t status;
-};
-
/*
* Compute the csum of a btree block and store the result to provided buffer.
*/
return csum_one_extent_buffer(eb);
}
-static blk_status_t btree_csum_one_bio(struct bio *bio)
+blk_status_t btree_csum_one_bio(struct bio *bio)
{
struct bio_vec *bvec;
struct btrfs_root *root;
return ret;
}
-static void run_one_async_start(struct btrfs_work *work)
-{
- struct async_submit_bio *async;
- blk_status_t ret;
-
- async = container_of(work, struct async_submit_bio, work);
- switch (async->submit_cmd) {
- case WQ_SUBMIT_METADATA:
- ret = btree_csum_one_bio(async->bio);
- break;
- case WQ_SUBMIT_DATA:
- case WQ_SUBMIT_DATA_DIO:
- ret = btrfs_csum_one_bio(btrfs_bio(async->bio));
- break;
- default:
- /* Can't happen so return something that would prevent the IO. */
- ret = BLK_STS_IOERR;
- ASSERT(0);
- }
- if (ret)
- async->status = ret;
-}
-
-/*
- * In order to insert checksums into the metadata in large chunks, we wait
- * until bio submission time. All the pages in the bio are checksummed and
- * sums are attached onto the ordered extent record.
- *
- * At IO completion time the csums attached on the ordered extent record are
- * inserted into the tree.
- */
-static void run_one_async_done(struct btrfs_work *work)
-{
- struct async_submit_bio *async =
- container_of(work, struct async_submit_bio, work);
- struct btrfs_inode *inode = async->inode;
- struct btrfs_bio *bbio = btrfs_bio(async->bio);
-
- /* If an error occurred we just want to clean up the bio and move on */
- if (async->status) {
- btrfs_bio_end_io(bbio, async->status);
- return;
- }
-
- /*
- * All of the bios that pass through here are from async helpers.
- * Use REQ_CGROUP_PUNT to issue them from the owning cgroup's context.
- * This changes nothing when cgroups aren't in use.
- */
- async->bio->bi_opf |= REQ_CGROUP_PUNT;
- btrfs_submit_bio(inode->root->fs_info, async->bio, async->mirror_num);
-}
-
-static void run_one_async_free(struct btrfs_work *work)
-{
- struct async_submit_bio *async;
-
- async = container_of(work, struct async_submit_bio, work);
- kfree(async);
-}
-
-/*
- * Submit bio to an async queue.
- *
- * Return:
- * - true if the work has been successfully submitted
- * - false in case of error
- */
-bool btrfs_wq_submit_bio(struct btrfs_inode *inode, struct bio *bio, int mirror_num,
- u64 dio_file_offset, enum btrfs_wq_submit_cmd cmd)
-{
- struct btrfs_fs_info *fs_info = inode->root->fs_info;
- struct async_submit_bio *async;
-
- async = kmalloc(sizeof(*async), GFP_NOFS);
- if (!async)
- return false;
-
- async->inode = inode;
- async->bio = bio;
- async->mirror_num = mirror_num;
- async->submit_cmd = cmd;
-
- btrfs_init_work(&async->work, run_one_async_start, run_one_async_done,
- run_one_async_free);
-
- async->dio_file_offset = dio_file_offset;
-
- async->status = 0;
-
- if (op_is_sync(bio->bi_opf))
- btrfs_queue_work(fs_info->hipri_workers, &async->work);
- else
- btrfs_queue_work(fs_info->workers, &async->work);
- return true;
-}
-
-static bool should_async_write(struct btrfs_fs_info *fs_info,
- struct btrfs_inode *bi)
-{
- if (btrfs_is_zoned(fs_info))
- return false;
- if (atomic_read(&bi->sync_writers))
- return false;
- if (test_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags))
- return false;
- return true;
-}
-
void btrfs_submit_metadata_bio(struct btrfs_inode *inode, struct bio *bio, int mirror_num)
{
- struct btrfs_fs_info *fs_info = inode->root->fs_info;
- struct btrfs_bio *bbio = btrfs_bio(bio);
- blk_status_t ret;
-
bio->bi_opf |= REQ_META;
-
- if (btrfs_op(bio) != BTRFS_MAP_WRITE) {
- btrfs_submit_bio(fs_info, bio, mirror_num);
- return;
- }
-
- /*
- * Kthread helpers are used to submit writes so that checksumming can
- * happen in parallel across all CPUs.
- */
- if (should_async_write(fs_info, inode) &&
- btrfs_wq_submit_bio(inode, bio, mirror_num, 0, WQ_SUBMIT_METADATA))
- return;
-
- ret = btree_csum_one_bio(bio);
- if (ret) {
- btrfs_bio_end_io(bbio, ret);
- return;
- }
-
- btrfs_submit_bio(fs_info, bio, mirror_num);
+ btrfs_submit_bio(inode->root->fs_info, bio, mirror_num);
}
#ifdef CONFIG_MIGRATION
int btrfs_read_extent_buffer(struct extent_buffer *buf,
struct btrfs_tree_parent_check *check);
-enum btrfs_wq_submit_cmd {
- WQ_SUBMIT_METADATA,
- WQ_SUBMIT_DATA,
- WQ_SUBMIT_DATA_DIO,
-};
-
-bool btrfs_wq_submit_bio(struct btrfs_inode *inode, struct bio *bio, int mirror_num,
- u64 dio_file_offset, enum btrfs_wq_submit_cmd cmd);
+blk_status_t btree_csum_one_bio(struct bio *bio);
int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
}
}
- /*
- * If we need to checksum, and the I/O is not issued by fsync and
- * friends, that is ->sync_writers != 0, defer the submission to a
- * workqueue to parallelize it.
- *
- * Csum items for reloc roots have already been cloned at this point,
- * so they are handled as part of the no-checksum case.
- */
- if (!(inode->flags & BTRFS_INODE_NODATASUM) &&
- !test_bit(BTRFS_FS_STATE_NO_CSUMS, &fs_info->fs_state) &&
- !btrfs_is_data_reloc_root(inode->root)) {
- if (!atomic_read(&inode->sync_writers) &&
- btrfs_wq_submit_bio(inode, bio, mirror_num, 0, WQ_SUBMIT_DATA))
- return;
-
- ret = btrfs_csum_one_bio(btrfs_bio(bio));
- if (ret) {
- btrfs_bio_end_io(btrfs_bio(bio), ret);
- return;
- }
- }
btrfs_submit_bio(fs_info, bio, mirror_num);
}
btrfs_dio_private_put(dip);
}
-static void btrfs_submit_dio_bio(struct bio *bio, struct btrfs_inode *inode,
- u64 file_offset, int async_submit)
-{
- struct btrfs_fs_info *fs_info = inode->root->fs_info;
- blk_status_t ret;
-
- if (inode->flags & BTRFS_INODE_NODATASUM)
- goto map;
-
- if (btrfs_op(bio) == BTRFS_MAP_WRITE) {
- /* Check btrfs_submit_data_write_bio() for async submit rules */
- if (async_submit && !atomic_read(&inode->sync_writers) &&
- btrfs_wq_submit_bio(inode, bio, 0, file_offset,
- WQ_SUBMIT_DATA_DIO))
- return;
-
- /*
- * If we aren't doing async submit, calculate the csum of the
- * bio now.
- */
- ret = btrfs_csum_one_bio(btrfs_bio(bio));
- if (ret) {
- btrfs_bio_end_io(btrfs_bio(bio), ret);
- return;
- }
- }
-map:
- btrfs_submit_bio(fs_info, bio, 0);
-}
-
static void btrfs_submit_direct(const struct iomap_iter *iter,
struct bio *dio_bio, loff_t file_offset)
{
container_of(dio_bio, struct btrfs_dio_private, bio);
struct inode *inode = iter->inode;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
- const bool raid56 = (btrfs_data_alloc_profile(fs_info) &
- BTRFS_BLOCK_GROUP_RAID56_MASK);
struct bio *bio;
u64 start_sector;
- int async_submit = 0;
u64 submit_len;
u64 clone_offset = 0;
u64 clone_len;
* We transfer the initial reference to the last bio, so we
* don't need to increment the reference count for the last one.
*/
- if (submit_len > 0) {
+ if (submit_len > 0)
refcount_inc(&dip->refs);
- /*
- * If we are submitting more than one bio, submit them
- * all asynchronously. The exception is RAID 5 or 6, as
- * asynchronous checksums make it difficult to collect
- * full stripe writes.
- */
- if (!raid56)
- async_submit = 1;
- }
- btrfs_submit_dio_bio(bio, BTRFS_I(inode), file_offset, async_submit);
+ btrfs_submit_bio(fs_info, bio, 0);
dio_data->submitted += clone_len;
clone_offset += clone_len;
projects / nvme.git / commitdiff