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| author |   NeilBrown <neilb@cse.unsw.edu.au> | 2005-06-21 17:17:27 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-21 19:07:47 -0700 |
| commit | a654b9d8f851f4ca02649d5825cbe6c608adb10c (patch) | |
| tree | 747301647f619a9f1dd48f4d6be96b5e35d2484c /include/linux/raid/md.h | |
| parent | [PATCH] md: fix deadlock due to md thread processing delayed requests. (diff) | |
| download | linux-dev-a654b9d8f851f4ca02649d5825cbe6c608adb10c.tar.xz linux-dev-a654b9d8f851f4ca02649d5825cbe6c608adb10c.zip | |
[PATCH] md: allow md intent bitmap to be stored near the superblock.
This provides an alternate to storing the bitmap in a separate file. The
bitmap can be stored at a given offset from the superblock. Obviously the
creator of the array must make sure this doesn't intersect with data....
After is good for version-0.90 superblocks.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/raid/md.h')
| -rw-r--r-- | include/linux/raid/md.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h index 75f41d8faed2..ffa316ce4dc8 100644 --- a/include/linux/raid/md.h +++ b/include/linux/raid/md.h @@ -60,7 +60,14 @@ */ #define MD_MAJOR_VERSION 0 #define MD_MINOR_VERSION 90 -#define MD_PATCHLEVEL_VERSION 1 +/* + * MD_PATCHLEVEL_VERSION indicates kernel functionality. + * >=1 means different superblock formats are selectable using SET_ARRAY_INFO + * and major_version/minor_version accordingly + * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT + * in the super status byte + */ +#define MD_PATCHLEVEL_VERSION 2 extern int register_md_personality (int p_num, mdk_personality_t *p); extern int unregister_md_personality (int p_num); @@ -78,6 +85,12 @@ extern void md_unplug_mddev(mddev_t *mddev); extern void md_print_devices (void); +extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev, + sector_t sector, int size, struct page *page); +extern int sync_page_io(struct block_device *bdev, sector_t sector, int size, + struct page *page, int rw); + + #define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); } #endif |