[PATCH v3 4/5] btrfs: remove buffer_heads from btrfsic_process_written_block()

Johannes Thumshirn
2020-01-27T15:59:43Z

Now that the last caller of btrfsic_process_written_block() with
buffer_heads is gone, remove the buffer_head processing path from it as
well.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/check-integrity.c | 103 +++++++++----------------------------
1 file changed, 25 insertions(+), 78 deletions(-)

diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index e7507985435e..4f6db2fe482a 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -152,11 +152,8 @@ struct btrfsic_block {
struct list_head ref_to_list; /* list */
struct list_head ref_from_list; /* list */
struct btrfsic_block *next_in_same_bio;
- void *orig_bio_bh_private;
- union {
- bio_end_io_t *bio;
- bh_end_io_t *bh;
- } orig_bio_bh_end_io;
+ void *orig_bio_private;
+ bio_end_io_t *orig_bio_end_io;
int submit_bio_bh_rw;
u64 flush_gen; /* only valid if !never_written */
};
@@ -325,14 +322,12 @@ static void btrfsic_process_written_block(struct btrfsic_dev_state *dev_state,
u64 dev_bytenr, char **mapped_datav,
unsigned int num_pages,
struct bio *bio, int *bio_is_patched,
- struct buffer_head *bh,
int submit_bio_bh_rw);
static int btrfsic_process_written_superblock(
struct btrfsic_state *state,
struct btrfsic_block *const block,
struct btrfs_super_block *const super_hdr);
static void btrfsic_bio_end_io(struct bio *bp);
-static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate);
static int btrfsic_is_block_ref_by_superblock(const struct btrfsic_state *state,
const struct btrfsic_block *block,
int recursion_level);
@@ -399,8 +394,8 @@ static void btrfsic_block_init(struct btrfsic_block *b)
b->never_written = 0;
b->mirror_num = 0;
b->next_in_same_bio = NULL;
- b->orig_bio_bh_private = NULL;
- b->orig_bio_bh_end_io.bio = NULL;
+ b->orig_bio_private = NULL;
+ b->orig_bio_end_io = NULL;
INIT_LIST_HEAD(&b->collision_resolving_node);
INIT_LIST_HEAD(&b->all_blocks_node);
INIT_LIST_HEAD(&b->ref_to_list);
@@ -1743,7 +1738,6 @@ static void btrfsic_process_written_block(struct btrfsic_dev_state *dev_state,
u64 dev_bytenr, char **mapped_datav,
unsigned int num_pages,
struct bio *bio, int *bio_is_patched,
- struct buffer_head *bh,
int submit_bio_bh_rw)
{
int is_metadata;
@@ -1902,9 +1896,9 @@ static void btrfsic_process_written_block(struct btrfsic_dev_state *dev_state,
block->is_iodone = 0;
BUG_ON(NULL == bio_is_patched);
if (!*bio_is_patched) {
- block->orig_bio_bh_private =
+ block->orig_bio_private =
bio->bi_private;
- block->orig_bio_bh_end_io.bio =
+ block->orig_bio_end_io =
bio->bi_end_io;
block->next_in_same_bio = NULL;
bio->bi_private = block;
@@ -1916,25 +1910,17 @@ static void btrfsic_process_written_block(struct btrfsic_dev_state *dev_state,
bio->bi_private;

BUG_ON(NULL == chained_block);
- block->orig_bio_bh_private =
- chained_block->orig_bio_bh_private;
- block->orig_bio_bh_end_io.bio =
- chained_block->orig_bio_bh_end_io.
- bio;
+ block->orig_bio_private =
+ chained_block->orig_bio_private;
+ block->orig_bio_end_io =
+ chained_block->orig_bio_end_io;
block->next_in_same_bio = chained_block;
bio->bi_private = block;
}
- } else if (NULL != bh) {
- block->is_iodone = 0;
- block->orig_bio_bh_private = bh->b_private;
- block->orig_bio_bh_end_io.bh = bh->b_end_io;
- block->next_in_same_bio = NULL;
- bh->b_private = block;
- bh->b_end_io = btrfsic_bh_end_io;
} else {
block->is_iodone = 1;
- block->orig_bio_bh_private = NULL;
- block->orig_bio_bh_end_io.bio = NULL;
+ block->orig_bio_private = NULL;
+ block->orig_bio_end_io = NULL;
block->next_in_same_bio = NULL;
}
}
@@ -2042,8 +2028,8 @@ static void btrfsic_process_written_block(struct btrfsic_dev_state *dev_state,
block->is_iodone = 0;
BUG_ON(NULL == bio_is_patched);
if (!*bio_is_patched) {
- block->orig_bio_bh_private = bio->bi_private;
- block->orig_bio_bh_end_io.bio = bio->bi_end_io;
+ block->orig_bio_private = bio->bi_private;
+ block->orig_bio_end_io = bio->bi_end_io;
block->next_in_same_bio = NULL;
bio->bi_private = block;
bio->bi_end_io = btrfsic_bio_end_io;
@@ -2054,24 +2040,17 @@ static void btrfsic_process_written_block(struct btrfsic_dev_state *dev_state,
bio->bi_private;

BUG_ON(NULL == chained_block);
- block->orig_bio_bh_private =
- chained_block->orig_bio_bh_private;
- block->orig_bio_bh_end_io.bio =
- chained_block->orig_bio_bh_end_io.bio;
+ block->orig_bio_private =
+ chained_block->orig_bio_private;
+ block->orig_bio_end_io =
+ chained_block->orig_bio_end_io;
block->next_in_same_bio = chained_block;
bio->bi_private = block;
}
- } else if (NULL != bh) {
- block->is_iodone = 0;
- block->orig_bio_bh_private = bh->b_private;
- block->orig_bio_bh_end_io.bh = bh->b_end_io;
- block->next_in_same_bio = NULL;
- bh->b_private = block;
- bh->b_end_io = btrfsic_bh_end_io;
} else {
block->is_iodone = 1;
- block->orig_bio_bh_private = NULL;
- block->orig_bio_bh_end_io.bio = NULL;
+ block->orig_bio_private = NULL;
+ block->orig_bio_end_io = NULL;
block->next_in_same_bio = NULL;
}
if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
@@ -2112,8 +2091,8 @@ static void btrfsic_bio_end_io(struct bio *bp)
iodone_w_error = 1;

BUG_ON(NULL == block);
- bp->bi_private = block->orig_bio_bh_private;
- bp->bi_end_io = block->orig_bio_bh_end_io.bio;
+ bp->bi_private = block->orig_bio_private;
+ bp->bi_end_io = block->orig_bio_end_io;

do {
struct btrfsic_block *next_block;
@@ -2146,38 +2125,6 @@ static void btrfsic_bio_end_io(struct bio *bp)
bp->bi_end_io(bp);
}

-static void btrfsic_bh_end_io(struct buffer_head *bh, int uptodate)
-{
- struct btrfsic_block *block = (struct btrfsic_block *)bh->b_private;
- int iodone_w_error = !uptodate;
- struct btrfsic_dev_state *dev_state;
-
- BUG_ON(NULL == block);
- dev_state = block->dev_state;
- if ((dev_state->state->print_mask & BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
- pr_info("bh_end_io(error=%d) for %c @%llu (%s/%llu/%d)\n",
- iodone_w_error,
- btrfsic_get_block_type(dev_state->state, block),
- block->logical_bytenr, block->dev_state->name,
- block->dev_bytenr, block->mirror_num);
-
- block->iodone_w_error = iodone_w_error;
- if (block->submit_bio_bh_rw & REQ_PREFLUSH) {
- dev_state->last_flush_gen++;
- if ((dev_state->state->print_mask &
- BTRFSIC_PRINT_MASK_END_IO_BIO_BH))
- pr_info("bh_end_io() new %s flush_gen=%llu\n",
- dev_state->name, dev_state->last_flush_gen);
- }
- if (block->submit_bio_bh_rw & REQ_FUA)
- block->flush_gen = 0; /* FUA completed means block is on disk */
-
- bh->b_private = block->orig_bio_bh_private;
- bh->b_end_io = block->orig_bio_bh_end_io.bh;
- block->is_iodone = 1; /* for FLUSH, this releases the block */
- bh->b_end_io(bh, uptodate);
-}
-
static int btrfsic_process_written_superblock(
struct btrfsic_state *state,
struct btrfsic_block *const superblock,
@@ -2781,7 +2728,7 @@ static void __btrfsic_submit_bio(struct bio *bio)
btrfsic_process_written_block(dev_state, dev_bytenr,
mapped_datav, segs,
bio, &bio_is_patched,
- NULL, bio->bi_opf);
+ bio->bi_opf);
bio_for_each_segment(bvec, bio, iter)
kunmap(bvec.bv_page);
kfree(mapped_datav);
@@ -2805,8 +2752,8 @@ static void __btrfsic_submit_bio(struct bio *bio)
block->iodone_w_error = 0;
block->flush_gen = dev_state->last_flush_gen + 1;
block->submit_bio_bh_rw = bio->bi_opf;
- block->orig_bio_bh_private = bio->bi_private;
- block->orig_bio_bh_end_io.bio = bio->bi_end_io;
+ block->orig_bio_private = bio->bi_private;
+ block->orig_bio_end_io = bio->bi_end_io;
block->next_in_same_bio = NULL;
bio->bi_private = block;
bio->bi_end_io = btrfsic_bio_end_io;
--
2.24.1