block: Do away with the notion of hardsect_size

Until now we have had a 1:1 mapping between storage device physical
block size and the logical block sized used when addressing the device.
With SATA 4KB drives coming out that will no longer be the case.  The
sector size will be 4KB but the logical block size will remain
512-bytes.  Hence we need to distinguish between the physical block size
and the logical ditto.

This patch renames hardsect_size to logical_block_size.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

16 files changed, 26 insertions, 25 deletions

diff --git a/fs/bio.c b/fs/bio.c
index 81dc93e72535..4445c3821730 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1490,11 +1490,12 @@ struct bio_pair *bio_split(struct bio *bi, int first_sectors)
 sector_t bio_sector_offset(struct bio *bio, unsigned short index,
                            unsigned int offset)
 {
-        unsigned int sector_sz = queue_hardsect_size(bio->bi_bdev->bd_disk->queue);
+        unsigned int sector_sz;
         struct bio_vec *bv;
         sector_t sectors;
         int i;
 
+        sector_sz = queue_logical_block_size(bio->bi_bdev->bd_disk->queue);
         sectors = 0;
 
         if (index >= bio->bi_idx)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index a85fe310fc6f..a29b4dcc1bca 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -76,7 +76,7 @@ int set_blocksize(struct block_device *bdev, int size)
                 return -EINVAL;
 
         /* Size cannot be smaller than the size supported by the device */
-        if (size < bdev_hardsect_size(bdev))
+        if (size < bdev_logical_block_size(bdev))
                 return -EINVAL;
 
         /* Don't change the size if it is same as current */
@@ -106,7 +106,7 @@ EXPORT_SYMBOL(sb_set_blocksize);
 
 int sb_min_blocksize(struct super_block *sb, int size)
 {
-        int minsize = bdev_hardsect_size(sb->s_bdev);
+        int minsize = bdev_logical_block_size(sb->s_bdev);
         if (size < minsize)
                 size = minsize;
         return sb_set_blocksize(sb, size);
@@ -1117,7 +1117,7 @@ EXPORT_SYMBOL(check_disk_change);
 
 void bd_set_size(struct block_device *bdev, loff_t size)
 {
-        unsigned bsize = bdev_hardsect_size(bdev);
+        unsigned bsize = bdev_logical_block_size(bdev);
 
         bdev->bd_inode->i_size = size;
         while (bsize < PAGE_CACHE_SIZE) {
diff --git a/fs/buffer.c b/fs/buffer.c
index aed297739eb0..36e2bbc60ec7 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1085,12 +1085,12 @@ static struct buffer_head *
 __getblk_slow(struct block_device *bdev, sector_t block, int size)
 {
         /* Size must be multiple of hard sectorsize */
-        if (unlikely(size & (bdev_hardsect_size(bdev)-1) ||
+        if (unlikely(size & (bdev_logical_block_size(bdev)-1) ||
                         (size < 512 || size > PAGE_SIZE))) {
                 printk(KERN_ERR "getblk(): invalid block size %d requested\n",
                                         size);
-                printk(KERN_ERR "hardsect size: %d\n",
-                                        bdev_hardsect_size(bdev));
+                printk(KERN_ERR "logical block size: %d\n",
+                                        bdev_logical_block_size(bdev));
 
                 dump_stack();
                 return NULL;
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 05763bbc2050..8b10b87dc01a 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1127,7 +1127,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
                 rw = WRITE_ODIRECT;
 
         if (bdev)
-                bdev_blkbits = blksize_bits(bdev_hardsect_size(bdev));
+                bdev_blkbits = blksize_bits(bdev_logical_block_size(bdev));
 
         if (offset & blocksize_mask) {
                 if (bdev)
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 599dbfe504c3..acbb94fdf903 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1696,7 +1696,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
                 goto failed_mount;
         }
 
-        hblock = bdev_hardsect_size(sb->s_bdev);
+        hblock = bdev_logical_block_size(sb->s_bdev);
         if (sb->s_blocksize != blocksize) {
                 /*
                  * Make sure the blocksize for the filesystem is larger
@@ -2119,7 +2119,7 @@ static journal_t *ext3_get_dev_journal(struct super_block *sb,
         }
 
         blocksize = sb->s_blocksize;
-        hblock = bdev_hardsect_size(bdev);
+        hblock = bdev_logical_block_size(bdev);
         if (blocksize < hblock) {
                 printk(KERN_ERR
                         "EXT3-fs: blocksize too small for journal device.\n");
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2958f4e6f222..a30549f7a305 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2962,7 +2962,7 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
         }
 
         blocksize = sb->s_blocksize;
-        hblock = bdev_hardsect_size(bdev);
+        hblock = bdev_logical_block_size(bdev);
         if (blocksize < hblock) {
                 printk(KERN_ERR
                         "EXT4-fs: blocksize too small for journal device.\n");
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 1ff9473ea753..a3b2ac989fc3 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -526,11 +526,11 @@ static int init_sb(struct gfs2_sbd *sdp, int silent)
         }
 
         /* Set up the buffer cache and SB for real */
-        if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
+        if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
                 ret = -EINVAL;
                 fs_err(sdp, "FS block size (%u) is too small for device "
                        "block size (%u)\n",
-                       sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
+                       sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
                 goto out;
         }
         if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 565038243fa2..a971d24e10ce 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -845,7 +845,7 @@ static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
         struct super_block *sb = sdp->sd_vfs;
         struct block_device *bdev = sb->s_bdev;
         const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize /
-                                           bdev_hardsect_size(sb->s_bdev);
+                                           bdev_logical_block_size(sb->s_bdev);
         u64 blk;
         sector_t start = 0;
         sector_t nr_sects = 0;
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 7f65b3be4aa9..a91f15b8673c 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -515,7 +515,7 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
 
         blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
         if (sb->s_blocksize != blocksize) {
-                int hw_blocksize = bdev_hardsect_size(sb->s_bdev);
+                int hw_blocksize = bdev_logical_block_size(sb->s_bdev);
 
                 if (blocksize < hw_blocksize) {
                         printk(KERN_ERR
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index f76951dcd4a6..6aa7c4713536 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -25,7 +25,7 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/spinlock.h>
-#include <linux/blkdev.h>       /* For bdev_hardsect_size(). */
+#include <linux/blkdev.h>       /* For bdev_logical_block_size(). */
 #include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
@@ -2785,13 +2785,13 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                 goto err_out_now;
 
         /* We support sector sizes up to the PAGE_CACHE_SIZE. */
-        if (bdev_hardsect_size(sb->s_bdev) > PAGE_CACHE_SIZE) {
+        if (bdev_logical_block_size(sb->s_bdev) > PAGE_CACHE_SIZE) {
                 if (!silent)
                         ntfs_error(sb, "Device has unsupported sector size "
                                         "(%i).  The maximum supported sector "
                                         "size on this architecture is %lu "
                                         "bytes.",
-                                        bdev_hardsect_size(sb->s_bdev),
+                                        bdev_logical_block_size(sb->s_bdev),
                                         PAGE_CACHE_SIZE);
                 goto err_out_now;
         }
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 4f85eceab376..09cc25d04611 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1371,7 +1371,7 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
 
         bdevname(reg->hr_bdev, reg->hr_dev_name);
 
-        sectsize = bdev_hardsect_size(reg->hr_bdev);
+        sectsize = bdev_logical_block_size(reg->hr_bdev);
         if (sectsize != reg->hr_block_bytes) {
                 mlog(ML_ERROR,
                      "blocksize %u incorrect for device, expected %d",
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 79ff8d9d37e0..5c6163f55039 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -713,7 +713,7 @@ static int ocfs2_sb_probe(struct super_block *sb,
         *bh = NULL;
 
         /* may be > 512 */
-        *sector_size = bdev_hardsect_size(sb->s_bdev);
+        *sector_size = bdev_logical_block_size(sb->s_bdev);
         if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
                 mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
                      *sector_size, OCFS2_MAX_BLOCKSIZE);
diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
index 46297683cd34..fc71aab08460 100644
--- a/fs/partitions/ibm.c
+++ b/fs/partitions/ibm.c
@@ -76,7 +76,7 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
         Sector sect;
 
         res = 0;
-        blocksize = bdev_hardsect_size(bdev);
+        blocksize = bdev_logical_block_size(bdev);
         if (blocksize <= 0)
                 goto out_exit;
         i_size = i_size_read(bdev->bd_inode);
diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 796511886f28..0028d2ef0662 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -110,7 +110,7 @@ parse_extended(struct parsed_partitions *state, struct block_device *bdev,
         Sector sect;
         unsigned char *data;
         u32 this_sector, this_size;
-        int sector_size = bdev_hardsect_size(bdev) / 512;
+        int sector_size = bdev_logical_block_size(bdev) / 512;
         int loopct = 0;         /* number of links followed
                                    without finding a data partition */
         int i;
@@ -415,7 +415,7 @@ static struct {
  
 int msdos_partition(struct parsed_partitions *state, struct block_device *bdev)
 {
-        int sector_size = bdev_hardsect_size(bdev) / 512;
+        int sector_size = bdev_logical_block_size(bdev) / 512;
         Sector sect;
         unsigned char *data;
         struct partition *p;
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 72348cc855a4..0ba44107d8f1 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1915,7 +1915,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
         if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
         } else {
-                uopt.blocksize = bdev_hardsect_size(sb->s_bdev);
+                uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
                 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
                 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
                         if (!silent)
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index e28800a9f2b5..1418b916fc27 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1501,7 +1501,7 @@ xfs_setsize_buftarg_early(
         struct block_device     *bdev)
 {
         return xfs_setsize_buftarg_flags(btp,
-                        PAGE_CACHE_SIZE, bdev_hardsect_size(bdev), 0);
+                        PAGE_CACHE_SIZE, bdev_logical_block_size(bdev), 0);
 }
 
 int