[PATCH 08/42] btrfs: set bi_op tp REQ_OP

From: mchristi
Date: Wed Apr 13 2016 - 15:37:00 EST

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From: Mike Christie <mchristi@xxxxxxxxxx>

This patch has btrfs use the bio bi_op for REQ_OP and bi_rw for rq_flag_bits.

v5:
- Misset bi_rw to REQ_OP_WRITE in finish_parity_scrub

Signed-off-by: Mike Christie <mchristi@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
fs/btrfs/check-integrity.c | 19 +++++++++----------
fs/btrfs/compression.c | 4 ++++
fs/btrfs/disk-io.c | 7 ++++---
fs/btrfs/inode.c | 20 +++++++++++++-------
fs/btrfs/raid56.c | 10 +++++-----
fs/btrfs/scrub.c | 9 +++++----
fs/btrfs/volumes.c | 20 ++++++++++----------
7 files changed, 50 insertions(+), 39 deletions(-)

diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index f82190f..c4a48e8 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -1673,7 +1673,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
}
bio->bi_bdev = block_ctx->dev->bdev;
bio->bi_iter.bi_sector = dev_bytenr >> 9;
- bio->bi_rw = READ;
+ bio->bi_op = REQ_OP_READ;

for (j = i; j < num_pages; j++) {
ret = bio_add_page(bio, block_ctx->pagev[j],
@@ -2922,7 +2922,6 @@ int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
static void __btrfsic_submit_bio(struct bio *bio)
{
struct btrfsic_dev_state *dev_state;
- int rw = bio->bi_rw;

if (!btrfsic_is_initialized)
return;
@@ -2932,7 +2931,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
* btrfsic_mount(), this might return NULL */
dev_state = btrfsic_dev_state_lookup(bio->bi_bdev);
if (NULL != dev_state &&
- (rw & WRITE) && NULL != bio->bi_io_vec) {
+ (bio->bi_op == REQ_OP_WRITE) && NULL != bio->bi_io_vec) {
unsigned int i;
u64 dev_bytenr;
u64 cur_bytenr;
@@ -2944,9 +2943,9 @@ static void __btrfsic_submit_bio(struct bio *bio)
if (dev_state->state->print_mask &
BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
printk(KERN_INFO
- "submit_bio(rw=0x%x, bi_vcnt=%u,"
+ "submit_bio(rw=%d,0x%lx, bi_vcnt=%u,"
" bi_sector=%llu (bytenr %llu), bi_bdev=%p)\n",
- rw, bio->bi_vcnt,
+ bio->bi_op, bio->bi_rw, bio->bi_vcnt,
(unsigned long long)bio->bi_iter.bi_sector,
dev_bytenr, bio->bi_bdev);

@@ -2977,18 +2976,18 @@ static void __btrfsic_submit_bio(struct bio *bio)
btrfsic_process_written_block(dev_state, dev_bytenr,
mapped_datav, bio->bi_vcnt,
bio, &bio_is_patched,
- NULL, rw);
+ NULL, bio->bi_rw);
while (i > 0) {
i--;
kunmap(bio->bi_io_vec[i].bv_page);
}
kfree(mapped_datav);
- } else if (NULL != dev_state && (rw & REQ_FLUSH)) {
+ } else if (NULL != dev_state && (bio->bi_rw & REQ_FLUSH)) {
if (dev_state->state->print_mask &
BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
printk(KERN_INFO
- "submit_bio(rw=0x%x FLUSH, bdev=%p)\n",
- rw, bio->bi_bdev);
+ "submit_bio(rw=%d,0x%lx FLUSH, bdev=%p)\n",
+ bio->bi_op, bio->bi_rw, bio->bi_bdev);
if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
if ((dev_state->state->print_mask &
(BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
@@ -3006,7 +3005,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
block->never_written = 0;
block->iodone_w_error = 0;
block->flush_gen = dev_state->last_flush_gen + 1;
- block->submit_bio_bh_rw = rw;
+ block->submit_bio_bh_rw = bio->bi_rw;
block->orig_bio_bh_private = bio->bi_private;
block->orig_bio_bh_end_io.bio = bio->bi_end_io;
block->next_in_same_bio = NULL;
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index ff61a41..334a00c 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -363,6 +363,7 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
kfree(cb);
return -ENOMEM;
}
+ bio->bi_op = REQ_OP_WRITE;
bio->bi_private = cb;
bio->bi_end_io = end_compressed_bio_write;
atomic_inc(&cb->pending_bios);
@@ -408,6 +409,7 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,

bio = compressed_bio_alloc(bdev, first_byte, GFP_NOFS);
BUG_ON(!bio);
+ bio->bi_op = REQ_OP_WRITE;
bio->bi_private = cb;
bio->bi_end_io = end_compressed_bio_write;
bio_add_page(bio, page, PAGE_SIZE, 0);
@@ -646,6 +648,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
comp_bio = compressed_bio_alloc(bdev, cur_disk_byte, GFP_NOFS);
if (!comp_bio)
goto fail2;
+ comp_bio->bi_op = REQ_OP_READ;
comp_bio->bi_private = cb;
comp_bio->bi_end_io = end_compressed_bio_read;
atomic_inc(&cb->pending_bios);
@@ -699,6 +702,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
comp_bio = compressed_bio_alloc(bdev, cur_disk_byte,
GFP_NOFS);
BUG_ON(!comp_bio);
+ comp_bio->bi_op = REQ_OP_READ;
comp_bio->bi_private = cb;
comp_bio->bi_end_io = end_compressed_bio_read;

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9a13c85..932268b 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -727,7 +727,7 @@ static void end_workqueue_bio(struct bio *bio)
fs_info = end_io_wq->info;
end_io_wq->error = bio->bi_error;

- if (bio->bi_rw & REQ_WRITE) {
+ if (bio->bi_op == REQ_OP_WRITE) {
if (end_io_wq->metadata == BTRFS_WQ_ENDIO_METADATA) {
wq = fs_info->endio_meta_write_workers;
func = btrfs_endio_meta_write_helper;
@@ -873,7 +873,7 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,

atomic_inc(&fs_info->nr_async_submits);

- if (rw & REQ_SYNC)
+ if (bio->bi_rw & REQ_SYNC)
btrfs_set_work_high_priority(&async->work);

btrfs_queue_work(fs_info->workers, &async->work);
@@ -951,7 +951,7 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
int async = check_async_write(inode, bio_flags);
int ret;

- if (!(rw & REQ_WRITE)) {
+ if (bio->bi_op != REQ_OP_WRITE) {
/*
* called for a read, do the setup so that checksum validation
* can happen in the async kernel threads
@@ -3476,6 +3476,7 @@ static int write_dev_flush(struct btrfs_device *device, int wait)

bio->bi_end_io = btrfs_end_empty_barrier;
bio->bi_bdev = device->bdev;
+ bio->bi_op = REQ_OP_WRITE;
bio->bi_rw = WRITE_FLUSH;
init_completion(&device->flush_wait);
bio->bi_private = &device->flush_wait;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d999fdf..f693490 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1894,7 +1894,7 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
if (btrfs_is_free_space_inode(inode))
metadata = BTRFS_WQ_ENDIO_FREE_SPACE;

- if (!(rw & REQ_WRITE)) {
+ if (bio->bi_op != REQ_OP_WRITE) {
ret = btrfs_bio_wq_end_io(root->fs_info, bio, metadata);
if (ret)
goto out;
@@ -7751,7 +7751,7 @@ static inline int submit_dio_repair_bio(struct inode *inode, struct bio *bio,
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;

- BUG_ON(rw & REQ_WRITE);
+ BUG_ON(bio->bi_op == REQ_OP_WRITE);

bio_get(bio);

@@ -7811,7 +7811,7 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio,
int read_mode;
int ret;

- BUG_ON(failed_bio->bi_rw & REQ_WRITE);
+ BUG_ON(failed_bio->bi_op == REQ_OP_WRITE);

ret = btrfs_get_io_failure_record(inode, start, end, &failrec);
if (ret)
@@ -7839,6 +7839,8 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio,
free_io_failure(inode, failrec);
return -EIO;
}
+ bio->bi_op = REQ_OP_READ;
+ bio->bi_rw = read_mode;

btrfs_debug(BTRFS_I(inode)->root->fs_info,
"Repair DIO Read Error: submitting new dio read[%#x] to this_mirror=%d, in_validation=%d\n",
@@ -8153,8 +8155,8 @@ static void btrfs_end_dio_bio(struct bio *bio)

if (err)
btrfs_warn(BTRFS_I(dip->inode)->root->fs_info,
- "direct IO failed ino %llu rw %lu sector %#Lx len %u err no %d",
- btrfs_ino(dip->inode), bio->bi_rw,
+ "direct IO failed ino %llu rw %d,%lu sector %#Lx len %u err no %d",
+ btrfs_ino(dip->inode), bio->bi_op, bio->bi_rw,
(unsigned long long)bio->bi_iter.bi_sector,
bio->bi_iter.bi_size, err);

@@ -8232,7 +8234,7 @@ static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode,
int async_submit)
{
struct btrfs_dio_private *dip = bio->bi_private;
- int write = rw & REQ_WRITE;
+ bool write = bio->bi_op == REQ_OP_WRITE;
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret;

@@ -8319,6 +8321,8 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
if (!bio)
return -ENOMEM;

+ bio->bi_op = orig_bio->bi_op;
+ bio->bi_rw = orig_bio->bi_rw;
bio->bi_private = dip;
bio->bi_end_io = btrfs_end_dio_bio;
btrfs_io_bio(bio)->logical = file_offset;
@@ -8356,12 +8360,14 @@ next_block:
start_sector, GFP_NOFS);
if (!bio)
goto out_err;
+ bio->bi_op = orig_bio->bi_op;
+ bio->bi_rw = orig_bio->bi_rw;
bio->bi_private = dip;
bio->bi_end_io = btrfs_end_dio_bio;
btrfs_io_bio(bio)->logical = file_offset;

map_length = orig_bio->bi_iter.bi_size;
- ret = btrfs_map_block(root->fs_info, rw,
+ ret = btrfs_map_block(root->fs_info, orig_bio->bi_op,
start_sector << 9,
&map_length, NULL, 0);
if (ret) {
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 439d7eb..dea2dd9 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1320,7 +1320,7 @@ write_data:

bio->bi_private = rbio;
bio->bi_end_io = raid_write_end_io;
- bio->bi_rw = WRITE;
+ bio->bi_op = REQ_OP_WRITE;

submit_bio(bio);
}
@@ -1575,7 +1575,7 @@ static int raid56_rmw_stripe(struct btrfs_raid_bio *rbio)

bio->bi_private = rbio;
bio->bi_end_io = raid_rmw_end_io;
- bio->bi_rw = READ;
+ bio->bi_op = REQ_OP_READ;

btrfs_bio_wq_end_io(rbio->fs_info, bio,
BTRFS_WQ_ENDIO_RAID56);
@@ -2100,7 +2100,7 @@ static int __raid56_parity_recover(struct btrfs_raid_bio *rbio)

bio->bi_private = rbio;
bio->bi_end_io = raid_recover_end_io;
- bio->bi_rw = READ;
+ bio->bi_op = REQ_OP_READ;

btrfs_bio_wq_end_io(rbio->fs_info, bio,
BTRFS_WQ_ENDIO_RAID56);
@@ -2437,7 +2437,7 @@ submit_write:

bio->bi_private = rbio;
bio->bi_end_io = raid_write_end_io;
- bio->bi_rw = WRITE;
+ bio->bi_op = REQ_OP_WRITE;

submit_bio(bio);
}
@@ -2616,7 +2616,7 @@ static void raid56_parity_scrub_stripe(struct btrfs_raid_bio *rbio)

bio->bi_private = rbio;
bio->bi_end_io = raid56_parity_scrub_end_io;
- bio->bi_rw = READ;
+ bio->bi_op = REQ_OP_READ;

btrfs_bio_wq_end_io(rbio->fs_info, bio,
BTRFS_WQ_ENDIO_RAID56);
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 184cb57..155b547 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1504,7 +1504,7 @@ static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
sblock->no_io_error_seen = 0;
} else {
bio->bi_iter.bi_sector = page->physical >> 9;
- bio->bi_rw = READ;
+ bio->bi_op = REQ_OP_READ;

if (btrfsic_submit_bio_wait(bio))
sblock->no_io_error_seen = 0;
@@ -1584,7 +1584,7 @@ static int scrub_repair_page_from_good_copy(struct scrub_block *sblock_bad,
return -EIO;
bio->bi_bdev = page_bad->dev->bdev;
bio->bi_iter.bi_sector = page_bad->physical >> 9;
- bio->bi_rw = WRITE;
+ bio->bi_op = REQ_OP_WRITE;

ret = bio_add_page(bio, page_good->page, PAGE_SIZE, 0);
if (PAGE_SIZE != ret) {
@@ -1686,7 +1686,7 @@ again:
bio->bi_end_io = scrub_wr_bio_end_io;
bio->bi_bdev = sbio->dev->bdev;
bio->bi_iter.bi_sector = sbio->physical >> 9;
- bio->bi_rw = WRITE;
+ bio->bi_op = REQ_OP_WRITE;
sbio->err = 0;
} else if (sbio->physical + sbio->page_count * PAGE_SIZE !=
spage->physical_for_dev_replace ||
@@ -2091,7 +2091,7 @@ again:
bio->bi_end_io = scrub_bio_end_io;
bio->bi_bdev = sbio->dev->bdev;
bio->bi_iter.bi_sector = sbio->physical >> 9;
- bio->bi_rw = READ;
+ bio->bi_op = REQ_OP_READ;
sbio->err = 0;
} else if (sbio->physical + sbio->page_count * PAGE_SIZE !=
spage->physical ||
@@ -4393,6 +4393,7 @@ static int write_page_nocow(struct scrub_ctx *sctx,
bio->bi_iter.bi_size = 0;
bio->bi_iter.bi_sector = physical_for_dev_replace >> 9;
bio->bi_bdev = dev->bdev;
+ bio->bi_op = REQ_OP_WRITE;
bio->bi_rw = WRITE_SYNC;
ret = bio_add_page(bio, page, PAGE_SIZE, 0);
if (ret != PAGE_SIZE) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 318215d..96fdf4b 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5884,7 +5884,7 @@ static void btrfs_end_bio(struct bio *bio)
BUG_ON(stripe_index >= bbio->num_stripes);
dev = bbio->stripes[stripe_index].dev;
if (dev->bdev) {
- if (bio->bi_rw & WRITE)
+ if (bio->bi_op == REQ_OP_WRITE)
btrfs_dev_stat_inc(dev,
BTRFS_DEV_STAT_WRITE_ERRS);
else
@@ -5949,7 +5949,7 @@ static noinline void btrfs_schedule_bio(struct btrfs_root *root,
}

/* don't bother with additional async steps for reads, right now */
- if (!(bio->bi_rw & REQ_WRITE)) {
+ if (bio->bi_op == REQ_OP_READ) {
bio_get(bio);
btrfsic_submit_bio(bio);
bio_put(bio);
@@ -5998,15 +5998,14 @@ static void submit_stripe_bio(struct btrfs_root *root, struct btrfs_bio *bbio,
btrfs_io_bio(bio)->stripe_index = dev_nr;
bio->bi_end_io = btrfs_end_bio;
bio->bi_iter.bi_sector = physical >> 9;
- bio->bi_rw |= rw;
#ifdef DEBUG
{
struct rcu_string *name;

rcu_read_lock();
name = rcu_dereference(dev->name);
- pr_debug("btrfs_map_bio: rw %d, sector=%llu, dev=%lu "
- "(%s id %llu), size=%u\n", rw,
+ pr_debug("btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu "
+ "(%s id %llu), size=%u\n", bio->bi_op, bio->bi_rw,
(u64)bio->bi_iter.bi_sector, (u_long)dev->bdev->bd_dev,
name->str, dev->devid, bio->bi_iter.bi_size);
rcu_read_unlock();
@@ -6053,8 +6052,8 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
map_length = length;

btrfs_bio_counter_inc_blocked(root->fs_info);
- ret = __btrfs_map_block(root->fs_info, rw, logical, &map_length, &bbio,
- mirror_num, 1);
+ ret = __btrfs_map_block(root->fs_info, bio->bi_op, logical,
+ &map_length, &bbio, mirror_num, 1);
if (ret) {
btrfs_bio_counter_dec(root->fs_info);
return ret;
@@ -6068,10 +6067,10 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
atomic_set(&bbio->stripes_pending, bbio->num_stripes);

if ((bbio->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) &&
- ((rw & WRITE) || (mirror_num > 1))) {
+ ((bio->bi_op == REQ_OP_WRITE) || (mirror_num > 1))) {
/* In this case, map_length has been set to the length of
a single stripe; not the whole write */
- if (rw & WRITE) {
+ if (bio->bi_op == REQ_OP_WRITE) {
ret = raid56_parity_write(root, bio, bbio, map_length);
} else {
ret = raid56_parity_recover(root, bio, bbio, map_length,
@@ -6090,7 +6089,8 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,

for (dev_nr = 0; dev_nr < total_devs; dev_nr++) {
dev = bbio->stripes[dev_nr].dev;
- if (!dev || !dev->bdev || (rw & WRITE && !dev->writeable)) {
+ if (!dev || !dev->bdev ||
+ (bio->bi_op == REQ_OP_WRITE && !dev->writeable)) {
bbio_error(bbio, first_bio, logical);
continue;
}
--
2.7.2

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