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Message-Id: <20231205123728.1866699-9-yukuai1@huaweicloud.com>
Date: Tue, 5 Dec 2023 20:37:22 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: axboe@...nel.dk, roger.pau@...rix.com, colyli@...e.de,
kent.overstreet@...il.com, joern@...ybastard.org,
miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
sth@...ux.ibm.com, hoeppner@...ux.ibm.com, hca@...ux.ibm.com,
gor@...ux.ibm.com, agordeev@...ux.ibm.com, jejb@...ux.ibm.com,
martin.petersen@...cle.com, clm@...com, josef@...icpanda.com,
dsterba@...e.com, nico@...xnic.net, xiang@...nel.org,
chao@...nel.org, tytso@....edu, adilger.kernel@...ger.ca,
agruenba@...hat.com, jack@...e.com, konishi.ryusuke@...il.com,
willy@...radead.org, akpm@...ux-foundation.org, hare@...e.de,
p.raghav@...sung.com
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
xen-devel@...ts.xenproject.org, linux-bcache@...r.kernel.org,
linux-mtd@...ts.infradead.org, linux-s390@...r.kernel.org,
linux-scsi@...r.kernel.org, linux-bcachefs@...r.kernel.org,
linux-btrfs@...r.kernel.org, linux-erofs@...ts.ozlabs.org,
linux-ext4@...r.kernel.org, gfs2@...ts.linux.dev,
linux-nilfs@...r.kernel.org, yukuai3@...wei.com,
yukuai1@...weicloud.com, yi.zhang@...wei.com, yangerkun@...wei.com
Subject: [PATCH -next RFC 08/14] btrfs: use bdev apis
From: Yu Kuai <yukuai3@...wei.com>
On the one hand covert to use folio while reading bdev inode, on the
other hand prevent to access bd_inode directly.
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
fs/btrfs/disk-io.c | 68 ++++++++++++++++++++--------------------------
fs/btrfs/volumes.c | 17 ++++++------
fs/btrfs/zoned.c | 12 ++++----
3 files changed, 42 insertions(+), 55 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9317606017e2..cfe7ea417760 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3597,28 +3597,24 @@ ALLOW_ERROR_INJECTION(open_ctree, ERRNO);
static void btrfs_end_super_write(struct bio *bio)
{
struct btrfs_device *device = bio->bi_private;
- struct bio_vec *bvec;
- struct bvec_iter_all iter_all;
- struct page *page;
-
- bio_for_each_segment_all(bvec, bio, iter_all) {
- page = bvec->bv_page;
+ struct folio_iter fi;
+ bio_for_each_folio_all(fi, bio) {
if (bio->bi_status) {
btrfs_warn_rl_in_rcu(device->fs_info,
"lost page write due to IO error on %s (%d)",
btrfs_dev_name(device),
blk_status_to_errno(bio->bi_status));
- ClearPageUptodate(page);
- SetPageError(page);
+ folio_clear_uptodate(fi.folio);
+ folio_set_error(fi.folio);
btrfs_dev_stat_inc_and_print(device,
BTRFS_DEV_STAT_WRITE_ERRS);
} else {
- SetPageUptodate(page);
+ folio_mark_uptodate(fi.folio);
}
- put_page(page);
- unlock_page(page);
+ folio_put(fi.folio);
+ folio_unlock(fi.folio);
}
bio_put(bio);
@@ -3628,9 +3624,8 @@ struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev,
int copy_num, bool drop_cache)
{
struct btrfs_super_block *super;
- struct page *page;
+ struct folio *folio;
u64 bytenr, bytenr_orig;
- struct address_space *mapping = bdev->bd_inode->i_mapping;
int ret;
bytenr_orig = btrfs_sb_offset(copy_num);
@@ -3651,16 +3646,15 @@ struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev,
* Drop the page of the primary superblock, so later read will
* always read from the device.
*/
- invalidate_inode_pages2_range(mapping,
- bytenr >> PAGE_SHIFT,
+ invalidate_bdev_range(bdev, bytenr >> PAGE_SHIFT,
(bytenr + BTRFS_SUPER_INFO_SIZE) >> PAGE_SHIFT);
}
- page = read_cache_page_gfp(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS);
- if (IS_ERR(page))
- return ERR_CAST(page);
+ folio = bdev_read_folio_gfp(bdev, bytenr >> PAGE_SHIFT, GFP_NOFS);
+ if (IS_ERR(folio))
+ return ERR_CAST(folio);
- super = page_address(page);
+ super = folio_address(folio);
if (btrfs_super_magic(super) != BTRFS_MAGIC) {
btrfs_release_disk_super(super);
return ERR_PTR(-ENODATA);
@@ -3717,7 +3711,6 @@ static int write_dev_supers(struct btrfs_device *device,
struct btrfs_super_block *sb, int max_mirrors)
{
struct btrfs_fs_info *fs_info = device->fs_info;
- struct address_space *mapping = device->bdev->bd_inode->i_mapping;
SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
int i;
int errors = 0;
@@ -3730,7 +3723,7 @@ static int write_dev_supers(struct btrfs_device *device,
shash->tfm = fs_info->csum_shash;
for (i = 0; i < max_mirrors; i++) {
- struct page *page;
+ struct folio *folio;
struct bio *bio;
struct btrfs_super_block *disk_super;
@@ -3755,9 +3748,10 @@ static int write_dev_supers(struct btrfs_device *device,
BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE,
sb->csum);
- page = find_or_create_page(mapping, bytenr >> PAGE_SHIFT,
- GFP_NOFS);
- if (!page) {
+ folio = bdev_find_or_create_folio(device->bdev,
+ bytenr >> PAGE_SHIFT,
+ GFP_NOFS);
+ if (IS_ERR(folio)) {
btrfs_err(device->fs_info,
"couldn't get super block page for bytenr %llu",
bytenr);
@@ -3766,9 +3760,9 @@ static int write_dev_supers(struct btrfs_device *device,
}
/* Bump the refcount for wait_dev_supers() */
- get_page(page);
+ folio_get(folio);
- disk_super = page_address(page);
+ disk_super = folio_address(folio);
memcpy(disk_super, sb, BTRFS_SUPER_INFO_SIZE);
/*
@@ -3782,8 +3776,8 @@ static int write_dev_supers(struct btrfs_device *device,
bio->bi_iter.bi_sector = bytenr >> SECTOR_SHIFT;
bio->bi_private = device;
bio->bi_end_io = btrfs_end_super_write;
- __bio_add_page(bio, page, BTRFS_SUPER_INFO_SIZE,
- offset_in_page(bytenr));
+ bio_add_folio_nofail(bio, folio, BTRFS_SUPER_INFO_SIZE,
+ offset_in_folio(folio, bytenr));
/*
* We FUA only the first super block. The others we allow to
@@ -3819,7 +3813,7 @@ static int wait_dev_supers(struct btrfs_device *device, int max_mirrors)
max_mirrors = BTRFS_SUPER_MIRROR_MAX;
for (i = 0; i < max_mirrors; i++) {
- struct page *page;
+ struct folio *folio;
ret = btrfs_sb_log_location(device, i, READ, &bytenr);
if (ret == -ENOENT) {
@@ -3834,27 +3828,23 @@ static int wait_dev_supers(struct btrfs_device *device, int max_mirrors)
device->commit_total_bytes)
break;
- page = find_get_page(device->bdev->bd_inode->i_mapping,
- bytenr >> PAGE_SHIFT);
- if (!page) {
+ folio = bdev_get_folio(device->bdev, bytenr >> PAGE_SHIFT);
+ if (!folio) {
errors++;
if (i == 0)
primary_failed = true;
continue;
}
/* Page is submitted locked and unlocked once the IO completes */
- wait_on_page_locked(page);
- if (PageError(page)) {
+ folio_wait_locked(folio);
+ if (folio_test_error(folio)) {
errors++;
if (i == 0)
primary_failed = true;
}
- /* Drop our reference */
- put_page(page);
-
- /* Drop the reference from the writing run */
- put_page(page);
+ /* Drop our reference and the reference from the writing run */
+ folio_put_refs(folio, 2);
}
/* log error, force error return */
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 1cc6b5d5eb61..3930495aebd1 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1230,16 +1230,16 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
void btrfs_release_disk_super(struct btrfs_super_block *super)
{
- struct page *page = virt_to_page(super);
+ struct folio *folio = virt_to_folio(super);
- put_page(page);
+ folio_put(folio);
}
static struct btrfs_super_block *btrfs_read_disk_super(struct block_device *bdev,
u64 bytenr, u64 bytenr_orig)
{
struct btrfs_super_block *disk_super;
- struct page *page;
+ struct folio *folio;
void *p;
pgoff_t index;
@@ -1257,15 +1257,14 @@ static struct btrfs_super_block *btrfs_read_disk_super(struct block_device *bdev
return ERR_PTR(-EINVAL);
/* pull in the page with our super */
- page = read_cache_page_gfp(bdev->bd_inode->i_mapping, index, GFP_KERNEL);
+ folio = bdev_read_folio_gfp(bdev, index, GFP_KERNEL);
+ if (IS_ERR(folio))
+ return ERR_CAST(folio);
- if (IS_ERR(page))
- return ERR_CAST(page);
-
- p = page_address(page);
+ p = folio_address(folio);
/* align our pointer to the offset of the super block */
- disk_super = p + offset_in_page(bytenr);
+ disk_super = p + offset_in_folio(folio, bytenr);
if (btrfs_super_bytenr(disk_super) != bytenr_orig ||
btrfs_super_magic(disk_super) != BTRFS_MAGIC) {
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 12066afc235c..77d5f906ff16 100644
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -120,8 +120,6 @@ static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones,
return -ENOENT;
} else if (full[0] && full[1]) {
/* Compare two super blocks */
- struct address_space *mapping = bdev->bd_inode->i_mapping;
- struct page *page[BTRFS_NR_SB_LOG_ZONES];
struct btrfs_super_block *super[BTRFS_NR_SB_LOG_ZONES];
int i;
@@ -129,15 +127,15 @@ static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones,
u64 zone_end = (zones[i].start + zones[i].capacity) << SECTOR_SHIFT;
u64 bytenr = ALIGN_DOWN(zone_end, BTRFS_SUPER_INFO_SIZE) -
BTRFS_SUPER_INFO_SIZE;
-
- page[i] = read_cache_page_gfp(mapping,
+ struct folio *folio = bdev_read_folio_gfp(bdev,
bytenr >> PAGE_SHIFT, GFP_NOFS);
- if (IS_ERR(page[i])) {
+
+ if (IS_ERR(folio)) {
if (i == 1)
btrfs_release_disk_super(super[0]);
- return PTR_ERR(page[i]);
+ return PTR_ERR(folio);
}
- super[i] = page_address(page[i]);
+ super[i] = folio_address(folio);
}
if (btrfs_super_generation(super[0]) >
--
2.39.2
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