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See http://www.infradead.org/rpr.html X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 X-loop: dm-devel@redhat.com Cc: Dave Kleikamp , jfs-discussion@lists.sourceforge.net, Mike Snitzer , linux-nvme@lists.infradead.org, Konstantin Komarov , Song Liu , dm-devel@redhat.com, target-devel@vger.kernel.org, linux-mtd@lists.infradead.org, reiserfs-devel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-nilfs@vger.kernel.org, linux-scsi@vger.kernel.org, OGAWA Hirofumi , linux-ext4@vger.kernel.org, Kees Cook , Josef Bacik , Coly Li , linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, David Sterba , Ryusuke Konishi , Anton Altaparmakov , linux-block@vger.kernel.org, linux-nfs@vger.kernel.org, Theodore Ts'o , linux-ntfs-dev@lists.sourceforge.net, Jan Kara , linux-fsdevel@vger.kernel.org, Phillip Lougher , ntfs3@lists.linux.dev, linux-btrfs@vger.kernel.org Subject: [dm-devel] [PATCH 04/29] md: use bdev_nr_sectors instead of open coding it X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Use the proper helper to read the block device size. Signed-off-by: Christoph Hellwig Reviewed-by: Kees Cook Acked-by: Song Liu --- drivers/md/md.c | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index ec09083ff0eff..9b4f4bf349120 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -890,8 +890,7 @@ static struct md_personality *find_pers(int level, char *clevel) /* return the offset of the super block in 512byte sectors */ 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(num_sectors); + return MD_NEW_SIZE_SECTORS(bdev_nr_sectors(rdev->bdev)); } static int alloc_disk_sb(struct md_rdev *rdev) @@ -1633,8 +1632,7 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_ */ switch(minor_version) { case 0: - sb_start = i_size_read(rdev->bdev->bd_inode) >> 9; - sb_start -= 8*2; + sb_start = bdev_nr_sectors(rdev->bdev) - 8 * 2; sb_start &= ~(sector_t)(4*2-1); break; case 1: @@ -1789,10 +1787,9 @@ static int super_1_load(struct md_rdev *rdev, struct md_rdev *refdev, int minor_ else ret = 0; } - if (minor_version) { - sectors = (i_size_read(rdev->bdev->bd_inode) >> 9); - sectors -= rdev->data_offset; - } else + if (minor_version) + sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; + else sectors = rdev->sb_start; if (sectors < le64_to_cpu(sb->data_size)) return -EINVAL; @@ -2170,8 +2167,7 @@ super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) return 0; /* too confusing */ if (rdev->sb_start < rdev->data_offset) { /* minor versions 1 and 2; superblock before data */ - max_sectors = i_size_read(rdev->bdev->bd_inode) >> 9; - max_sectors -= rdev->data_offset; + max_sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; if (!num_sectors || num_sectors > max_sectors) num_sectors = max_sectors; } else if (rdev->mddev->bitmap_info.offset) { @@ -2180,7 +2176,7 @@ super_1_rdev_size_change(struct md_rdev *rdev, sector_t num_sectors) } else { /* minor version 0; superblock after data */ 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 */ sb_start = dev_size - 8*2; @@ -3384,7 +3380,7 @@ rdev_size_store(struct md_rdev *rdev, const char *buf, size_t len) if (!sectors) return -EBUSY; } else if (!sectors) - sectors = (i_size_read(rdev->bdev->bd_inode) >> 9) - + sectors = bdev_nr_sectors(rdev->bdev) - rdev->data_offset; if (!my_mddev->pers->resize) /* Cannot change size for RAID0 or Linear etc */ @@ -3711,7 +3707,7 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe kobject_init(&rdev->kobj, &rdev_ktype); - size = i_size_read(rdev->bdev->bd_inode) >> BLOCK_SIZE_BITS; + size = (bdev_nr_sectors(rdev->bdev) << SECTOR_SHIFT) >> BLOCK_SIZE_BITS; if (!size) { pr_warn("md: %s has zero or unknown size, marking faulty!\n", bdevname(rdev->bdev,b)); @@ -6882,7 +6878,7 @@ int md_add_new_disk(struct mddev *mddev, struct mdu_disk_info_s *info) if (!mddev->persistent) { 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 rdev->sb_start = calc_dev_sboffset(rdev); rdev->sectors = rdev->sb_start; @@ -6969,7 +6965,7 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev) if (mddev->persistent) rdev->sb_start = calc_dev_sboffset(rdev); 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;