From 4b66ec588a3d07488788696392cab052ff4815f3 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 9 Sep 2005 16:23:53 -0700 Subject: [PATCH] --- yaml --- r: 8327 b: refs/heads/master c: 0002b2718dd04da67c21f8a7830de8d95a9b0345 h: refs/heads/master i: 8325: c4db1075377e1e1835ea282a45775a479edd507b 8323: 5452ea2004a7c3b57bf29795d9f7c2c5558c0427 8319: 766fbd0c79b0bea488483ac1ab9df34c122794af v: v3 --- [refs] | 2 +- trunk/drivers/md/md.c | 20 +++++++++++++++----- trunk/include/linux/raid/md_k.h | 1 + 3 files changed, 17 insertions(+), 6 deletions(-) diff --git a/[refs] b/[refs] index 505c16457e78..1fec805a32d1 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 773f7834425e83144c95fbbc553ced3c2b74b828 +refs/heads/master: 0002b2718dd04da67c21f8a7830de8d95a9b0345 diff --git a/trunk/drivers/md/md.c b/trunk/drivers/md/md.c index 1be3f2de396b..be7873c61b3c 100644 --- a/trunk/drivers/md/md.c +++ b/trunk/drivers/md/md.c @@ -393,7 +393,7 @@ int sync_page_io(struct block_device *bdev, sector_t sector, int size, return ret; } -static int read_disk_sb(mdk_rdev_t * rdev) +static int read_disk_sb(mdk_rdev_t * rdev, int size) { char b[BDEVNAME_SIZE]; if (!rdev->sb_page) { @@ -404,7 +404,7 @@ static int read_disk_sb(mdk_rdev_t * rdev) return 0; - if (!sync_page_io(rdev->bdev, rdev->sb_offset<<1, MD_SB_BYTES, rdev->sb_page, READ)) + if (!sync_page_io(rdev->bdev, rdev->sb_offset<<1, size, rdev->sb_page, READ)) goto fail; rdev->sb_loaded = 1; return 0; @@ -531,7 +531,7 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version sb_offset = calc_dev_sboffset(rdev->bdev); rdev->sb_offset = sb_offset; - ret = read_disk_sb(rdev); + ret = read_disk_sb(rdev, MD_SB_BYTES); if (ret) return ret; ret = -EINVAL; @@ -564,6 +564,7 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version rdev->preferred_minor = sb->md_minor; rdev->data_offset = 0; + rdev->sb_size = MD_SB_BYTES; if (sb->level == LEVEL_MULTIPATH) rdev->desc_nr = -1; @@ -837,6 +838,7 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version) int ret; sector_t sb_offset; char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE]; + int bmask; /* * Calculate the position of the superblock. @@ -865,7 +867,10 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version) } rdev->sb_offset = sb_offset; - ret = read_disk_sb(rdev); + /* superblock is rarely larger than 1K, but it can be larger, + * and it is safe to read 4k, so we do that + */ + ret = read_disk_sb(rdev, 4096); if (ret) return ret; @@ -891,6 +896,11 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version) rdev->preferred_minor = 0xffff; 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; + if (rdev->sb_size & bmask) + rdev-> sb_size = (rdev->sb_size | bmask)+1; + if (refdev == 0) return 1; else { @@ -1375,7 +1385,7 @@ static void md_update_sb(mddev_t * mddev) dprintk("%s ", bdevname(rdev->bdev,b)); if (!rdev->faulty) { md_super_write(mddev,rdev, - rdev->sb_offset<<1, MD_SB_BYTES, + rdev->sb_offset<<1, rdev->sb_size, rdev->sb_page); dprintk(KERN_INFO "(write) %s's sb offset: %llu\n", bdevname(rdev->bdev,b), diff --git a/trunk/include/linux/raid/md_k.h b/trunk/include/linux/raid/md_k.h index 8042f55dd323..ebce949b1443 100644 --- a/trunk/include/linux/raid/md_k.h +++ b/trunk/include/linux/raid/md_k.h @@ -102,6 +102,7 @@ struct mdk_rdev_s int sb_loaded; sector_t data_offset; /* start of data in array */ sector_t sb_offset; + int sb_size; /* bytes in the superblock */ int preferred_minor; /* autorun support */ /* A device can be in one of three states based on two flags: