md: use bdev_nr_sectors instead of open coding it

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20211018101130.1838532-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-10-18 12:11:06 +02:00 committed by Jens Axboe
parent 6dcbb52cdd
commit 0fe80347fd

View File

@ -888,8 +888,7 @@ static struct md_personality *find_pers(int level, char *clevel)
/* return the offset of the super block in 512byte sectors */ /* return the offset of the super block in 512byte sectors */
static inline sector_t calc_dev_sboffset(struct md_rdev *rdev) static inline sector_t calc_dev_sboffset(struct md_rdev *rdev)
{ {
sector_t num_sectors = i_size_read(rdev->bdev->bd_inode) / 512; return MD_NEW_SIZE_SECTORS(bdev_nr_sectors(rdev->bdev));
return MD_NEW_SIZE_SECTORS(num_sectors);
} }
static int alloc_disk_sb(struct md_rdev *rdev) static int alloc_disk_sb(struct md_rdev *rdev)
@ -1631,8 +1630,7 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_
*/ */
switch(minor_version) { switch(minor_version) {
case 0: case 0:
sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; sb_start = bdev_nr_sectors(rdev->bdev) - 8 * 2;
sb_start -= 8*2;
sb_start &= ~(sector_t)(4*2-1); sb_start &= ~(sector_t)(4*2-1);
break; break;
case 1: case 1:
@ -1787,10 +1785,9 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_
else else
ret = 0; ret = 0;
} }
if (minor_version) { if (minor_version)
sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset;
sectors -= rdev->data_offset; else
} else
sectors = rdev->sb_start; sectors = rdev->sb_start;
if (sectors < le64_to_cpu(sb->data_size)) if (sectors < le64_to_cpu(sb->data_size))
return -EINVAL; return -EINVAL;
@ -2168,8 +2165,7 @@ super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors)
return 0; /* too confusing */ return 0; /* too confusing */
if (rdev->sb_start < rdev->data_offset) { if (rdev->sb_start < rdev->data_offset) {
/* minor versions 1 and 2; superblock before data */ /* minor versions 1 and 2; superblock before data */
max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; max_sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset;
max_sectors -= rdev->data_offset;
if (!num_sectors || num_sectors > max_sectors) if (!num_sectors || num_sectors > max_sectors)
num_sectors = max_sectors; num_sectors = max_sectors;
} else if (rdev->mddev->bitmap_info.offset) { } else if (rdev->mddev->bitmap_info.offset) {
@ -2178,7 +2174,7 @@ super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors)
} else { } else {
/* minor version 0; superblock after data */ /* minor version 0; superblock after data */
sector_t sb_start, bm_space; sector_t sb_start, bm_space;
sector_t dev_size = i_size_read(rdev->bdev->bd_inode) >> 9; sector_t dev_size = bdev_nr_sectors(rdev->bdev);
/* 8K is for superblock */ /* 8K is for superblock */
sb_start = dev_size - 8*2; sb_start = dev_size - 8*2;
@ -3382,7 +3378,7 @@ rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len)
if (!sectors) if (!sectors)
return -EBUSY; return -EBUSY;
} else if (!sectors) } else if (!sectors)
sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - sectors = bdev_nr_sectors(rdev->bdev) -
rdev->data_offset; rdev->data_offset;
if (!my_mddev->pers->resize) if (!my_mddev->pers->resize)
/* Cannot change size for RAID0 or Linear etc */ /* Cannot change size for RAID0 or Linear etc */
@ -3709,7 +3705,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
kobject_init(&rdev->kobj, &rdev_ktype); kobject_init(&rdev->kobj, &rdev_ktype);
size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; size = bdev_nr_bytes(rdev->bdev) >> BLOCK_SIZE_BITS;
if (!size) { if (!size) {
pr_warn("md: %s has zero or unknown size, marking faulty!\n", pr_warn("md: %s has zero or unknown size, marking faulty!\n",
bdevname(rdev->bdev,b)); bdevname(rdev->bdev,b));
@ -6880,7 +6876,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info)
if (!mddev->persistent) { if (!mddev->persistent) {
pr_debug("md: nonpersistent superblock ...\n"); pr_debug("md: nonpersistent superblock ...\n");
rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; rdev->sb_start = bdev_nr_sectors(rdev->bdev);
} else } else
rdev->sb_start = calc_dev_sboffset(rdev); rdev->sb_start = calc_dev_sboffset(rdev);
rdev->sectors = rdev->sb_start; rdev->sectors = rdev->sb_start;
@ -6967,7 +6963,7 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev)
if (mddev->persistent) if (mddev->persistent)
rdev->sb_start = calc_dev_sboffset(rdev); rdev->sb_start = calc_dev_sboffset(rdev);
else else
rdev->sb_start = i_size_read(rdev->bdev->bd_inode) / 512; rdev->sb_start = bdev_nr_sectors(rdev->bdev);
rdev->sectors = rdev->sb_start; rdev->sectors = rdev->sb_start;