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Diffstat (limited to 'fs/logfs/dev_bdev.c')
-rw-r--r--fs/logfs/dev_bdev.c83
1 files changed, 31 insertions, 52 deletions
diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index 92ca6fbe09b..76279e11982 100644
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -10,38 +10,27 @@
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/gfp.h>
+#include <linux/prefetch.h>
#define PAGE_OFS(ofs) ((ofs) & (PAGE_SIZE-1))
-static void request_complete(struct bio *bio, int err)
-{
- complete((struct completion *)bio->bi_private);
-}
-
static int sync_request(struct page *page, struct block_device *bdev, int rw)
{
struct bio bio;
struct bio_vec bio_vec;
- struct completion complete;
bio_init(&bio);
+ bio.bi_max_vecs = 1;
bio.bi_io_vec = &bio_vec;
bio_vec.bv_page = page;
bio_vec.bv_len = PAGE_SIZE;
bio_vec.bv_offset = 0;
bio.bi_vcnt = 1;
- bio.bi_idx = 0;
- bio.bi_size = PAGE_SIZE;
bio.bi_bdev = bdev;
- bio.bi_sector = page->index * (PAGE_SIZE >> 9);
- init_completion(&complete);
- bio.bi_private = &complete;
- bio.bi_end_io = request_complete;
-
- submit_bio(rw, &bio);
- generic_unplug_device(bdev_get_queue(bdev));
- wait_for_completion(&complete);
- return test_bit(BIO_UPTODATE, &bio.bi_flags) ? 0 : -EIO;
+ bio.bi_iter.bi_sector = page->index * (PAGE_SIZE >> 9);
+ bio.bi_iter.bi_size = PAGE_SIZE;
+
+ return submit_bio_wait(rw, &bio);
}
static int bdev_readpage(void *_sb, struct page *page)
@@ -67,22 +56,18 @@ static DECLARE_WAIT_QUEUE_HEAD(wq);
static void writeseg_end_io(struct bio *bio, int err)
{
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
+ struct bio_vec *bvec;
+ int i;
struct super_block *sb = bio->bi_private;
struct logfs_super *super = logfs_super(sb);
- struct page *page;
BUG_ON(!uptodate); /* FIXME: Retry io or write elsewhere */
BUG_ON(err);
- BUG_ON(bio->bi_vcnt == 0);
- do {
- page = bvec->bv_page;
- if (--bvec >= bio->bi_io_vec)
- prefetchw(&bvec->bv_page->flags);
-
- end_page_writeback(page);
- page_cache_release(page);
- } while (bvec >= bio->bi_io_vec);
+
+ bio_for_each_segment_all(bvec, bio, i) {
+ end_page_writeback(bvec->bv_page);
+ page_cache_release(bvec->bv_page);
+ }
bio_put(bio);
if (atomic_dec_and_test(&super->s_pending_writes))
wake_up(&wq);
@@ -95,12 +80,11 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
struct address_space *mapping = super->s_mapping_inode->i_mapping;
struct bio *bio;
struct page *page;
- struct request_queue *q = bdev_get_queue(sb->s_bdev);
- unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
+ unsigned int max_pages;
int i;
- if (max_pages > BIO_MAX_PAGES)
- max_pages = BIO_MAX_PAGES;
+ max_pages = min(nr_pages, (size_t) bio_get_nr_vecs(super->s_bdev));
+
bio = bio_alloc(GFP_NOFS, max_pages);
BUG_ON(!bio);
@@ -108,10 +92,9 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
if (i >= max_pages) {
/* Block layer cannot split bios :( */
bio->bi_vcnt = i;
- bio->bi_idx = 0;
- bio->bi_size = i * PAGE_SIZE;
+ bio->bi_iter.bi_size = i * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = writeseg_end_io;
atomic_inc(&super->s_pending_writes);
@@ -136,10 +119,9 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index,
unlock_page(page);
}
bio->bi_vcnt = nr_pages;
- bio->bi_idx = 0;
- bio->bi_size = nr_pages * PAGE_SIZE;
+ bio->bi_iter.bi_size = nr_pages * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = writeseg_end_io;
atomic_inc(&super->s_pending_writes);
@@ -168,7 +150,6 @@ static void bdev_writeseg(struct super_block *sb, u64 ofs, size_t len)
}
len = PAGE_ALIGN(len);
__bdev_writeseg(sb, ofs, ofs >> PAGE_SHIFT, len >> PAGE_SHIFT);
- generic_unplug_device(bdev_get_queue(logfs_super(sb)->s_bdev));
}
@@ -191,12 +172,11 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
{
struct logfs_super *super = logfs_super(sb);
struct bio *bio;
- struct request_queue *q = bdev_get_queue(sb->s_bdev);
- unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
+ unsigned int max_pages;
int i;
- if (max_pages > BIO_MAX_PAGES)
- max_pages = BIO_MAX_PAGES;
+ max_pages = min(nr_pages, (size_t) bio_get_nr_vecs(super->s_bdev));
+
bio = bio_alloc(GFP_NOFS, max_pages);
BUG_ON(!bio);
@@ -204,10 +184,9 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
if (i >= max_pages) {
/* Block layer cannot split bios :( */
bio->bi_vcnt = i;
- bio->bi_idx = 0;
- bio->bi_size = i * PAGE_SIZE;
+ bio->bi_iter.bi_size = i * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = erase_end_io;
atomic_inc(&super->s_pending_writes);
@@ -226,10 +205,9 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
bio->bi_io_vec[i].bv_offset = 0;
}
bio->bi_vcnt = nr_pages;
- bio->bi_idx = 0;
- bio->bi_size = nr_pages * PAGE_SIZE;
+ bio->bi_iter.bi_size = nr_pages * PAGE_SIZE;
bio->bi_bdev = super->s_bdev;
- bio->bi_sector = ofs >> 9;
+ bio->bi_iter.bi_sector = ofs >> 9;
bio->bi_private = sb;
bio->bi_end_io = erase_end_io;
atomic_inc(&super->s_pending_writes);
@@ -300,7 +278,7 @@ static int bdev_write_sb(struct super_block *sb, struct page *page)
static void bdev_put_device(struct logfs_super *s)
{
- close_bdev_exclusive(s->s_bdev, FMODE_READ|FMODE_WRITE);
+ blkdev_put(s->s_bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
}
static int bdev_can_write_buf(struct super_block *sb, u64 ofs)
@@ -325,13 +303,14 @@ int logfs_get_sb_bdev(struct logfs_super *p, struct file_system_type *type,
{
struct block_device *bdev;
- bdev = open_bdev_exclusive(devname, FMODE_READ|FMODE_WRITE, type);
+ bdev = blkdev_get_by_path(devname, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
+ type);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
int mtdnr = MINOR(bdev->bd_dev);
- close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
+ blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
return logfs_get_sb_mtd(p, mtdnr);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:26:52 +0000