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Btrfs: Retry metadata reads in the face of checksum failures

ソースを参照 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
このコミットが含まれているのは:
Chris Mason
2008-04-09 16:28:12 -04:00
親 22c599485b
コミット f188591e98
7個のファイルの変更、138行の追加、52行の削除
Patchファイルをダウンロード Diffファイルをダウンロード すべてのファイルを展開 すべてのファイルを折り畳む

50
fs/btrfs/extent_io.c
ファイルの表示

@@ -1546,7 +1546,7 @@ static int end_bio_extent_readpage(struct bio *bio,
!(state->state & EXTENT_LOCKED))
state = NULL;
}
if (!state) {
if (!state && uptodate) {
spin_unlock_irqrestore(&tree->lock, flags);
set_extent_uptodate(tree, start, end,
GFP_ATOMIC);
@@ -1567,8 +1567,10 @@ static int end_bio_extent_readpage(struct bio *bio,
} else {
state = NULL;
}
set_state_cb(tree, clear, EXTENT_UPTODATE);
clear->state |= EXTENT_UPTODATE;
if (uptodate) {
set_state_cb(tree, clear, EXTENT_UPTODATE);
clear->state |= EXTENT_UPTODATE;
}
clear_state_bit(tree, clear, EXTENT_LOCKED,
1, 0);
if (cur == start)
@@ -1685,7 +1687,7 @@ extent_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
return bio;
}
static int submit_one_bio(int rw, struct bio *bio)
static int submit_one_bio(int rw, struct bio *bio, int mirror_num)
{
u64 maxsector;
int ret = 0;
@@ -1722,7 +1724,8 @@ static int submit_one_bio(int rw, struct bio *bio)
WARN_ON(1);
}
if (tree->ops && tree->ops->submit_bio_hook)
tree->ops->submit_bio_hook(page->mapping->host, rw, bio);
tree->ops->submit_bio_hook(page->mapping->host, rw, bio,
mirror_num);
else
submit_bio(rw, bio);
if (bio_flagged(bio, BIO_EOPNOTSUPP))
@@ -1737,7 +1740,8 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
struct block_device *bdev,
struct bio **bio_ret,
unsigned long max_pages,
bio_end_io_t end_io_func)
bio_end_io_t end_io_func,
int mirror_num)
{
int ret = 0;
struct bio *bio;
@@ -1749,7 +1753,7 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
(tree->ops && tree->ops->merge_bio_hook &&
tree->ops->merge_bio_hook(page, offset, size, bio)) ||
bio_add_page(bio, page, size, offset) < size) {
ret = submit_one_bio(rw, bio);
ret = submit_one_bio(rw, bio, mirror_num);
bio = NULL;
} else {
return 0;
@@ -1769,7 +1773,7 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
if (bio_ret) {
*bio_ret = bio;
} else {
ret = submit_one_bio(rw, bio);
ret = submit_one_bio(rw, bio, mirror_num);
}
return ret;
@@ -1798,7 +1802,7 @@ void set_page_extent_head(struct page *page, unsigned long len)
static int __extent_read_full_page(struct extent_io_tree *tree,
struct page *page,
get_extent_t *get_extent,
struct bio **bio)
struct bio **bio, int mirror_num)
{
struct inode *inode = page->mapping->host;
u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
@@ -1901,7 +1905,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
ret = submit_extent_page(READ, tree, page,
sector, iosize, page_offset,
bdev, bio, nr,
end_bio_extent_readpage);
end_bio_extent_readpage, mirror_num);
}
if (ret)
SetPageError(page);
@@ -1923,9 +1927,9 @@ int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
struct bio *bio = NULL;
int ret;
ret = __extent_read_full_page(tree, page, get_extent, &bio);
ret = __extent_read_full_page(tree, page, get_extent, &bio, 0);
if (bio)
submit_one_bio(READ, bio);
submit_one_bio(READ, bio, 0);
return ret;
}
EXPORT_SYMBOL(extent_read_full_page);
@@ -2077,7 +2081,7 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
ret = submit_extent_page(WRITE, tree, page, sector,
iosize, page_offset, bdev,
&epd->bio, max_nr,
end_bio_extent_writepage);
end_bio_extent_writepage, 0);
if (ret)
SetPageError(page);
}
@@ -2244,7 +2248,7 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
write_cache_pages(mapping, &wbc_writepages, __extent_writepage, &epd);
if (epd.bio) {
submit_one_bio(WRITE, epd.bio);
submit_one_bio(WRITE, epd.bio, 0);
}
return ret;
}
@@ -2265,7 +2269,7 @@ int extent_writepages(struct extent_io_tree *tree,
ret = write_cache_pages(mapping, wbc, __extent_writepage, &epd);
if (epd.bio) {
submit_one_bio(WRITE, epd.bio);
submit_one_bio(WRITE, epd.bio, 0);
}
return ret;
}
@@ -2297,7 +2301,8 @@ int extent_readpages(struct extent_io_tree *tree,
page_cache_get(page);
if (!pagevec_add(&pvec, page))
__pagevec_lru_add(&pvec);
__extent_read_full_page(tree, page, get_extent, &bio);
__extent_read_full_page(tree, page, get_extent,
&bio, 0);
}
page_cache_release(page);
}
@@ -2305,7 +2310,7 @@ int extent_readpages(struct extent_io_tree *tree,
__pagevec_lru_add(&pvec);
BUG_ON(!list_empty(pages));
if (bio)
submit_one_bio(READ, bio);
submit_one_bio(READ, bio, 0);
return 0;
}
EXPORT_SYMBOL(extent_readpages);
@@ -2430,7 +2435,7 @@ int extent_prepare_write(struct extent_io_tree *tree,
ret = submit_extent_page(READ, tree, page,
sector, iosize, page_offset, em->bdev,
NULL, 1,
end_bio_extent_preparewrite);
end_bio_extent_preparewrite, 0);
iocount++;
block_start = block_start + iosize;
} else {
@@ -2696,6 +2701,7 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree,
mark_page_accessed(page0);
set_page_extent_mapped(page0);
set_page_extent_head(page0, len);
uptodate = PageUptodate(page0);
} else {
i = 0;
}
@@ -3006,7 +3012,7 @@ EXPORT_SYMBOL(extent_buffer_uptodate);
int read_extent_buffer_pages(struct extent_io_tree *tree,
struct extent_buffer *eb,
u64 start, int wait,
get_extent_t *get_extent)
get_extent_t *get_extent, int mirror_num)
{
unsigned long i;
unsigned long start_i;
@@ -3062,8 +3068,10 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
if (!PageUptodate(page)) {
if (start_i == 0)
inc_all_pages = 1;
ClearPageError(page);
err = __extent_read_full_page(tree, page,
get_extent, &bio);
get_extent, &bio,
mirror_num);
if (err) {
ret = err;
}
@@ -3073,7 +3081,7 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
}
if (bio)
submit_one_bio(READ, bio);
submit_one_bio(READ, bio, mirror_num);
if (ret || !wait) {
return ret;