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author | Jonathan Brassow <jbrassow@redhat.com> | 2011-07-27 01:00:37 (GMT) |
---|---|---|
committer | NeilBrown <neilb@suse.de> | 2011-07-27 01:00:37 (GMT) |
commit | 3520fa4db7fc4ae1b0373dcecdaf720f620dab2d (patch) | |
tree | 62c675a29c65f89ec15f4a52203e5e0f731c2aa5 /drivers/md/bitmap.c | |
parent | 654e8b5abc0a793f0c029128db6e4804691a383e (diff) | |
download | linux-3520fa4db7fc4ae1b0373dcecdaf720f620dab2d.tar.xz |
MD bitmap: Revert DM dirty log hooks
Revert most of commit e384e58549a2e9a83071ad80280c1a9053cfd84c
md/bitmap: prepare for storing write-intent-bitmap via dm-dirty-log.
MD should not need to use DM's dirty log - we decided to use md's
bitmaps instead.
Keeping the DIV_ROUND_UP clean-ups that were part of commit
e384e58549a2e9a83071ad80280c1a9053cfd84c, however.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/bitmap.c')
-rw-r--r-- | drivers/md/bitmap.c | 133 |
1 files changed, 43 insertions, 90 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 39ff0ef..0dc6546 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -29,7 +29,6 @@ #include "md.h" #include "bitmap.h" -#include <linux/dm-dirty-log.h> /* debug macros */ #define DEBUG 0 @@ -775,10 +774,8 @@ static inline unsigned long file_page_offset(struct bitmap *bitmap, unsigned lon * 0 or page 1 */ static inline struct page *filemap_get_page(struct bitmap *bitmap, - unsigned long chunk) + unsigned long chunk) { - if (bitmap->filemap == NULL) - return NULL; if (file_page_index(bitmap, chunk) >= bitmap->file_pages) return NULL; return bitmap->filemap[file_page_index(bitmap, chunk) @@ -878,28 +875,19 @@ enum bitmap_page_attr { static inline void set_page_attr(struct bitmap *bitmap, struct page *page, enum bitmap_page_attr attr) { - if (page) - __set_bit((page->index<<2) + attr, bitmap->filemap_attr); - else - __set_bit(attr, &bitmap->logattrs); + __set_bit((page->index<<2) + attr, bitmap->filemap_attr); } static inline void clear_page_attr(struct bitmap *bitmap, struct page *page, enum bitmap_page_attr attr) { - if (page) - __clear_bit((page->index<<2) + attr, bitmap->filemap_attr); - else - __clear_bit(attr, &bitmap->logattrs); + __clear_bit((page->index<<2) + attr, bitmap->filemap_attr); } static inline unsigned long test_page_attr(struct bitmap *bitmap, struct page *page, enum bitmap_page_attr attr) { - if (page) - return test_bit((page->index<<2) + attr, bitmap->filemap_attr); - else - return test_bit(attr, &bitmap->logattrs); + return test_bit((page->index<<2) + attr, bitmap->filemap_attr); } /* @@ -912,30 +900,26 @@ static inline unsigned long test_page_attr(struct bitmap *bitmap, struct page *p static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block) { unsigned long bit; - struct page *page = NULL; + struct page *page; void *kaddr; unsigned long chunk = block >> CHUNK_BLOCK_SHIFT(bitmap); - if (!bitmap->filemap) { - struct dm_dirty_log *log = bitmap->mddev->bitmap_info.log; - if (log) - log->type->mark_region(log, chunk); - } else { + if (!bitmap->filemap) + return; - page = filemap_get_page(bitmap, chunk); - if (!page) - return; - bit = file_page_offset(bitmap, chunk); + page = filemap_get_page(bitmap, chunk); + if (!page) + return; + bit = file_page_offset(bitmap, chunk); - /* set the bit */ - kaddr = kmap_atomic(page, KM_USER0); - if (bitmap->flags & BITMAP_HOSTENDIAN) - set_bit(bit, kaddr); - else - __set_bit_le(bit, kaddr); - kunmap_atomic(kaddr, KM_USER0); - PRINTK("set file bit %lu page %lu\n", bit, page->index); - } + /* set the bit */ + kaddr = kmap_atomic(page, KM_USER0); + if (bitmap->flags & BITMAP_HOSTENDIAN) + set_bit(bit, kaddr); + else + __set_bit_le(bit, kaddr); + kunmap_atomic(kaddr, KM_USER0); + PRINTK("set file bit %lu page %lu\n", bit, page->index); /* record page number so it gets flushed to disk when unplug occurs */ set_page_attr(bitmap, page, BITMAP_PAGE_DIRTY); } @@ -952,16 +936,6 @@ void bitmap_unplug(struct bitmap *bitmap) if (!bitmap) return; - if (!bitmap->filemap) { - /* Must be using a dirty_log */ - struct dm_dirty_log *log = bitmap->mddev->bitmap_info.log; - dirty = test_and_clear_bit(BITMAP_PAGE_DIRTY, &bitmap->logattrs); - need_write = test_and_clear_bit(BITMAP_PAGE_NEEDWRITE, &bitmap->logattrs); - if (dirty || need_write) - if (log->type->flush(log)) - bitmap->flags |= BITMAP_WRITE_ERROR; - goto out; - } /* look at each page to see if there are any set bits that need to be * flushed out to disk */ @@ -990,7 +964,6 @@ void bitmap_unplug(struct bitmap *bitmap) else md_super_wait(bitmap->mddev); } -out: if (bitmap->flags & BITMAP_WRITE_ERROR) bitmap_file_kick(bitmap); } @@ -1199,7 +1172,6 @@ void bitmap_daemon_work(mddev_t *mddev) struct page *page = NULL, *lastpage = NULL; sector_t blocks; void *paddr; - struct dm_dirty_log *log = mddev->bitmap_info.log; /* Use a mutex to guard daemon_work against * bitmap_destroy. @@ -1224,12 +1196,11 @@ void bitmap_daemon_work(mddev_t *mddev) spin_lock_irqsave(&bitmap->lock, flags); for (j = 0; j < bitmap->chunks; j++) { bitmap_counter_t *bmc; - if (!bitmap->filemap) { - if (!log) - /* error or shutdown */ - break; - } else - page = filemap_get_page(bitmap, j); + if (!bitmap->filemap) + /* error or shutdown */ + break; + + page = filemap_get_page(bitmap, j); if (page != lastpage) { /* skip this page unless it's marked as needing cleaning */ @@ -1298,19 +1269,16 @@ void bitmap_daemon_work(mddev_t *mddev) -1); /* clear the bit */ - if (page) { - paddr = kmap_atomic(page, KM_USER0); - if (bitmap->flags & BITMAP_HOSTENDIAN) - clear_bit(file_page_offset(bitmap, j), - paddr); - else - __clear_bit_le( + paddr = kmap_atomic(page, KM_USER0); + if (bitmap->flags & BITMAP_HOSTENDIAN) + clear_bit(file_page_offset(bitmap, j), + paddr); + else + __clear_bit_le( file_page_offset(bitmap, j), paddr); - kunmap_atomic(paddr, KM_USER0); - } else - log->type->clear_region(log, j); + kunmap_atomic(paddr, KM_USER0); } } else j |= PAGE_COUNTER_MASK; @@ -1318,16 +1286,12 @@ void bitmap_daemon_work(mddev_t *mddev) spin_unlock_irqrestore(&bitmap->lock, flags); /* now sync the final page */ - if (lastpage != NULL || log != NULL) { + if (lastpage != NULL) { spin_lock_irqsave(&bitmap->lock, flags); if (test_page_attr(bitmap, lastpage, BITMAP_PAGE_NEEDWRITE)) { clear_page_attr(bitmap, lastpage, BITMAP_PAGE_NEEDWRITE); spin_unlock_irqrestore(&bitmap->lock, flags); - if (lastpage) - write_page(bitmap, lastpage, 0); - else - if (log->type->flush(log)) - bitmap->flags |= BITMAP_WRITE_ERROR; + write_page(bitmap, lastpage, 0); } else { set_page_attr(bitmap, lastpage, BITMAP_PAGE_NEEDWRITE); spin_unlock_irqrestore(&bitmap->lock, flags); @@ -1769,12 +1733,10 @@ int bitmap_create(mddev_t *mddev) BUILD_BUG_ON(sizeof(bitmap_super_t) != 256); if (!file - && !mddev->bitmap_info.offset - && !mddev->bitmap_info.log) /* bitmap disabled, nothing to do */ + && !mddev->bitmap_info.offset) /* bitmap disabled, nothing to do */ return 0; BUG_ON(file && mddev->bitmap_info.offset); - BUG_ON(mddev->bitmap_info.offset && mddev->bitmap_info.log); bitmap = kzalloc(sizeof(*bitmap), GFP_KERNEL); if (!bitmap) @@ -1865,6 +1827,7 @@ int bitmap_create(mddev_t *mddev) int bitmap_load(mddev_t *mddev) { int err = 0; + sector_t start = 0; sector_t sector = 0; struct bitmap *bitmap = mddev->bitmap; @@ -1883,24 +1846,14 @@ int bitmap_load(mddev_t *mddev) } bitmap_close_sync(bitmap); - if (mddev->bitmap_info.log) { - unsigned long i; - struct dm_dirty_log *log = mddev->bitmap_info.log; - for (i = 0; i < bitmap->chunks; i++) - if (!log->type->in_sync(log, i, 1)) - bitmap_set_memory_bits(bitmap, - (sector_t)i << CHUNK_BLOCK_SHIFT(bitmap), - 1); - } else { - sector_t start = 0; - if (mddev->degraded == 0 - || bitmap->events_cleared == mddev->events) - /* no need to keep dirty bits to optimise a - * re-add of a missing device */ - start = mddev->recovery_cp; - - err = bitmap_init_from_disk(bitmap, start); - } + if (mddev->degraded == 0 + || bitmap->events_cleared == mddev->events) + /* no need to keep dirty bits to optimise a + * re-add of a missing device */ + start = mddev->recovery_cp; + + err = bitmap_init_from_disk(bitmap, start); + if (err) goto out; |