[PATCH md 000 of 5] Introduction

[PATCH md 000 of 5] Introduction

[NeilBrown]

5 patches for md in 2.5.13-mm1.
The first you may already have of linux-kernel.

The remainder are little bug fixes and some enhancments to the content
of /proc/mdstat.  All are suitable for early dispatch to Linus.

Thanks,
NeilBrown

 [PATCH md 001 of 5] drivers/md/raid1.c: make a function static
 [PATCH md 002 of 5] Choose better default offset for bitmap.
 [PATCH md 003 of 5] Use queue_hardsect_size instead of block_size for md superblock size calc.
 [PATCH md 004 of 5] Add information about superblock version to /proc/mdstat
 [PATCH md 005 of 5] Report spare drives in /proc/mdstat

[PATCH md 002 of 5] Choose better default offset for bitmap.

[NeilBrown]

On reflection, a better default location for hot-adding
bitmaps with version-1 superblocks is immediately after
the superblock.  There might not be much room there, but
there is usually atleast 3k, and that is a good start.

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/md.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~	2005-09-02 15:59:28.000000000 +1000
+++ ./drivers/md/md.c	2005-09-02 15:59:39.000000000 +1000
@@ -957,8 +957,7 @@ static int super_1_validate(mddev_t *mdd
 		mddev->events = le64_to_cpu(sb->events);
 		mddev->bitmap_offset = 0;
 		mddev->default_bitmap_offset = 0;
-		if (mddev->minor_version == 0)
-			mddev->default_bitmap_offset = -(64*1024)/512;
+		mddev->default_bitmap_offset = 1024;
 		
 		mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
 		memcpy(mddev->uuid, sb->set_uuid, 16);

[PATCH md 001 of 5] drivers/md/raid1.c: make a function static

[NeilBrown]

This patch makes a needlessly global function static.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/raid1.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff ./drivers/md/raid1.c~current~ ./drivers/md/raid1.c
--- ./drivers/md/raid1.c~current~	2005-09-02 15:59:28.000000000 +1000
+++ ./drivers/md/raid1.c	2005-09-02 15:59:34.000000000 +1000
@@ -1703,7 +1703,7 @@ static int raid1_reshape(mddev_t *mddev,
 	return 0;
 }
 
-void raid1_quiesce(mddev_t *mddev, int state)
+static void raid1_quiesce(mddev_t *mddev, int state)
 {
 	conf_t *conf = mddev_to_conf(mddev);
 

[PATCH md 003 of 5] Use queue_hardsect_size instead of block_size for md superblock size calc.

[NeilBrown]

Doh.  I want the physical hard-sector-size, not the current block size...

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/md.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~	2005-09-02 15:59:39.000000000 +1000
+++ ./drivers/md/md.c	2005-09-02 15:59:46.000000000 +1000
@@ -898,7 +898,7 @@ static int super_1_load(mdk_rdev_t *rdev
 	rdev->data_offset = le64_to_cpu(sb->data_offset);
 
 	rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256;
-	bmask = block_size(rdev->bdev)-1;
+	bmask = queue_hardsect_size(rdev->bdev->bd_disk->queue)-1;
 	if (rdev->sb_size & bmask)
 		rdev-> sb_size = (rdev->sb_size | bmask)+1;
 

[PATCH md 004 of 5] Add information about superblock version to /proc/mdstat

[NeilBrown]

Leave it unchanged if the original (0.90) is used, incase it might
be a compatability problem.

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/md.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~	2005-09-02 15:59:46.000000000 +1000
+++ ./drivers/md/md.c	2005-09-02 15:59:50.000000000 +1000
@@ -3346,6 +3346,15 @@ static int md_seq_show(struct seq_file *
 				seq_printf(seq, "\n      %llu blocks",
 					(unsigned long long)size);
 		}
+		if (mddev->persistent) {
+			if (mddev->major_version != 0 ||
+			    mddev->minor_version != 90) {
+				seq_printf(seq," super %d.%d",
+					   mddev->major_version,
+					   mddev->minor_version);
+			}
+		} else
+			seq_printf(seq, " super non-persistent");
 
 		if (mddev->pers) {
 			mddev->pers->status (seq, mddev);

[PATCH md 005 of 5] Report spare drives in /proc/mdstat

[NeilBrown]

Just like failed drives have (F), so spare drives now have (S).


Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/md.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff ./drivers/md/md.c~current~ ./drivers/md/md.c
--- ./drivers/md/md.c~current~	2005-09-02 15:59:50.000000000 +1000
+++ ./drivers/md/md.c	2005-09-02 16:00:04.000000000 +1000
@@ -3334,7 +3334,8 @@ static int md_seq_show(struct seq_file *
 			if (rdev->faulty) {
 				seq_printf(seq, "(F)");
 				continue;
-			}
+			} else if (rdev->raid_disk < 0)
+				seq_printf(seq, "(S)"); /* spare */
 			size += rdev->size;
 		}
 

[PATCH md 000 of 5] Introduction

[NeilBrown]

Following are 5 patches that start by adding sysfs support to 'md',
and then proceed to add functionality that makes use if it.

For example:
  The raid5 stripe cache can be resized with
    echo NNN > /sys/block/mdX/md/raid5/stripe_cache_size
  An array can resync'ed with
    echo repair > /sys/block/mdX/md/scan_mode

  On raid5, the number of parity mismatches found will be reported in
    /sys/block/mdX/md/mismatch_cnd

You will note that raid5 has got the most new functionality.  Matching
functionality for other md personalities will follow.

These patches should be suitable for merging after 2.6.14 is released.

NeilBrown


 [PATCH md 001 of 5] Initial sysfs support for md
 [PATCH md 002 of 5] Extend md sysfs support to component devices.
 [PATCH md 003 of 5] Add kobject/sysfs support to raid5
 [PATCH md 004 of 5] Allow a manual resync with md
 [PATCH md 005 of 5] Teach raid5 the difference between 'check' and 'repair'.