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Message-Id: <1061020032547.1716@suse.de>
Date: Fri, 20 Oct 2006 13:25:47 +1000
From: NeilBrown <neilb@...e.de>
To: Andrew Morton <akpm@...l.org>
Cc: linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 004 of 4] md: Endian annotations for the bitmap superblock
And a couple of bug fixes found by sparse.
Signed-off-by: Neil Brown <neilb@...e.de>
### Diffstat output
./drivers/md/bitmap.c | 10 +++++-----
./include/linux/raid/bitmap.h | 20 ++++++++++----------
2 files changed, 15 insertions(+), 15 deletions(-)
diff .prev/drivers/md/bitmap.c ./drivers/md/bitmap.c
--- .prev/drivers/md/bitmap.c 2006-10-20 11:49:19.000000000 +1000
+++ ./drivers/md/bitmap.c 2006-10-20 12:00:58.000000000 +1000
@@ -536,7 +536,7 @@ static int bitmap_read_sb(struct bitmap
printk(KERN_INFO "%s: bitmap file is out of date (%llu < %llu) "
"-- forcing full recovery\n", bmname(bitmap), events,
(unsigned long long) bitmap->mddev->events);
- sb->state |= BITMAP_STALE;
+ sb->state |= cpu_to_le32(BITMAP_STALE);
}
success:
/* assign fields using values from superblock */
@@ -544,11 +544,11 @@ success:
bitmap->daemon_sleep = daemon_sleep;
bitmap->daemon_lastrun = jiffies;
bitmap->max_write_behind = write_behind;
- bitmap->flags |= sb->state;
+ bitmap->flags |= le32_to_cpu(sb->state);
if (le32_to_cpu(sb->version) == BITMAP_MAJOR_HOSTENDIAN)
bitmap->flags |= BITMAP_HOSTENDIAN;
bitmap->events_cleared = le64_to_cpu(sb->events_cleared);
- if (sb->state & BITMAP_STALE)
+ if (sb->state & cpu_to_le32(BITMAP_STALE))
bitmap->events_cleared = bitmap->mddev->events;
err = 0;
out:
@@ -578,9 +578,9 @@ static void bitmap_mask_state(struct bit
spin_unlock_irqrestore(&bitmap->lock, flags);
sb = (bitmap_super_t *)kmap_atomic(bitmap->sb_page, KM_USER0);
switch (op) {
- case MASK_SET: sb->state |= bits;
+ case MASK_SET: sb->state |= cpu_to_le32(bits);
break;
- case MASK_UNSET: sb->state &= ~bits;
+ case MASK_UNSET: sb->state &= cpu_to_le32(~bits);
break;
default: BUG();
}
diff .prev/include/linux/raid/bitmap.h ./include/linux/raid/bitmap.h
--- .prev/include/linux/raid/bitmap.h 2006-10-20 11:41:01.000000000 +1000
+++ ./include/linux/raid/bitmap.h 2006-10-20 12:00:58.000000000 +1000
@@ -146,16 +146,16 @@ enum bitmap_state {
/* the superblock at the front of the bitmap file -- little endian */
typedef struct bitmap_super_s {
- __u32 magic; /* 0 BITMAP_MAGIC */
- __u32 version; /* 4 the bitmap major for now, could change... */
- __u8 uuid[16]; /* 8 128 bit uuid - must match md device uuid */
- __u64 events; /* 24 event counter for the bitmap (1)*/
- __u64 events_cleared;/*32 event counter when last bit cleared (2) */
- __u64 sync_size; /* 40 the size of the md device's sync range(3) */
- __u32 state; /* 48 bitmap state information */
- __u32 chunksize; /* 52 the bitmap chunk size in bytes */
- __u32 daemon_sleep; /* 56 seconds between disk flushes */
- __u32 write_behind; /* 60 number of outstanding write-behind writes */
+ __le32 magic; /* 0 BITMAP_MAGIC */
+ __le32 version; /* 4 the bitmap major for now, could change... */
+ __u8 uuid[16]; /* 8 128 bit uuid - must match md device uuid */
+ __le64 events; /* 24 event counter for the bitmap (1)*/
+ __le64 events_cleared;/*32 event counter when last bit cleared (2) */
+ __le64 sync_size; /* 40 the size of the md device's sync range(3) */
+ __le32 state; /* 48 bitmap state information */
+ __le32 chunksize; /* 52 the bitmap chunk size in bytes */
+ __le32 daemon_sleep; /* 56 seconds between disk flushes */
+ __le32 write_behind; /* 60 number of outstanding write-behind writes */
__u8 pad[256 - 64]; /* set to zero */
} bitmap_super_t;
-
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