summaryrefslogtreecommitdiff
path: root/fs/btrfs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/ctree.c2
-rw-r--r--fs/btrfs/disk-io.c56
-rw-r--r--fs/btrfs/disk-io.h2
-rw-r--r--fs/btrfs/extent-tree.c4
-rw-r--r--fs/btrfs/extent_io.c49
-rw-r--r--fs/btrfs/extent_io.h7
-rw-r--r--fs/btrfs/inode.c66
-rw-r--r--fs/btrfs/tree-defrag.c7
-rw-r--r--fs/btrfs/volumes.c11
9 files changed, 155 insertions, 49 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 289d71d8653a..02e571e6ee62 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -379,7 +379,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
cur = btrfs_find_tree_block(root, blocknr, blocksize);
if (cur)
- uptodate = btrfs_buffer_uptodate(cur);
+ uptodate = btrfs_buffer_uptodate(cur, gen);
else
uptodate = 0;
if (!cur || !uptodate) {
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index edee7a44f861..574b1245964e 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -205,6 +205,33 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
return 0;
}
+static int verify_parent_transid(struct extent_io_tree *io_tree,
+ struct extent_buffer *eb, u64 parent_transid)
+{
+ int ret;
+
+ if (!parent_transid || btrfs_header_generation(eb) == parent_transid)
+ return 0;
+
+ lock_extent(io_tree, eb->start, eb->start + eb->len - 1, GFP_NOFS);
+ if (extent_buffer_uptodate(io_tree, eb) &&
+ btrfs_header_generation(eb) == parent_transid) {
+ ret = 0;
+ goto out;
+ }
+ printk("parent transid verify failed on %llu wanted %llu found %llu\n",
+ (unsigned long long)eb->start,
+ (unsigned long long)parent_transid,
+ (unsigned long long)btrfs_header_generation(eb));
+ ret = 1;
+out:
+ clear_extent_buffer_uptodate(io_tree, eb);
+ unlock_extent(io_tree, eb->start, eb->start + eb->len - 1,
+ GFP_NOFS);
+ return ret;
+
+}
+
static int btree_read_extent_buffer_pages(struct btrfs_root *root,
struct extent_buffer *eb,
u64 start, u64 parent_transid)
@@ -218,7 +245,8 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
while (1) {
ret = read_extent_buffer_pages(io_tree, eb, start, 1,
btree_get_extent, mirror_num);
- if (!ret)
+ if (!ret &&
+ !verify_parent_transid(io_tree, eb, parent_transid))
return ret;
num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
@@ -330,6 +358,13 @@ int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
ret = -EIO;
goto err;
}
+ if (memcmp_extent_buffer(eb, root->fs_info->fsid,
+ (unsigned long)btrfs_header_fsid(eb),
+ BTRFS_FSID_SIZE)) {
+ printk("bad fsid on block %Lu\n", eb->start);
+ ret = -EIO;
+ goto err;
+ }
found_level = btrfs_header_level(eb);
ret = csum_tree_block(root, eb, 1);
@@ -1363,7 +1398,9 @@ static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
"I/O error on %s\n",
bdevname(bh->b_bdev, b));
}
- set_buffer_write_io_error(bh);
+ /* note, we dont' set_buffer_write_io_error because we have
+ * our own ways of dealing with the IO errors
+ */
clear_buffer_uptodate(bh);
}
unlock_buffer(bh);
@@ -1459,7 +1496,8 @@ int write_all_supers(struct btrfs_root *root)
ret = submit_bh(WRITE, bh);
BUG_ON(ret);
wait_on_buffer(bh);
- BUG_ON(!buffer_uptodate(bh));
+ if (!buffer_uptodate(bh))
+ total_errors++;
} else {
total_errors++;
}
@@ -1607,10 +1645,18 @@ int close_ctree(struct btrfs_root *root)
return 0;
}
-int btrfs_buffer_uptodate(struct extent_buffer *buf)
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
{
+ int ret;
struct inode *btree_inode = buf->first_page->mapping->host;
- return extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf);
+
+ ret = extent_buffer_uptodate(&BTRFS_I(btree_inode)->io_tree, buf);
+ if (!ret)
+ return ret;
+
+ ret = verify_parent_transid(&BTRFS_I(btree_inode)->io_tree, buf,
+ parent_transid);
+ return !ret;
}
int btrfs_set_buffer_uptodate(struct extent_buffer *buf)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index e29c895d5230..30d1ed293c25 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -56,7 +56,7 @@ int btrfs_insert_dev_radix(struct btrfs_root *root,
void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
-int btrfs_buffer_uptodate(struct extent_buffer *buf);
+int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
int wait_on_tree_block_writeback(struct btrfs_root *root,
struct extent_buffer *buf);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index db07dde4a870..605018c6045c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1366,7 +1366,7 @@ static int pin_down_bytes(struct btrfs_root *root, u64 bytenr, u32 num_bytes,
if (!pending) {
buf = btrfs_find_tree_block(root, bytenr, num_bytes);
if (buf) {
- if (btrfs_buffer_uptodate(buf)) {
+ if (btrfs_buffer_uptodate(buf, 0)) {
u64 transid =
root->fs_info->running_transaction->transid;
u64 header_transid =
@@ -2151,7 +2151,7 @@ static int noinline walk_down_tree(struct btrfs_trans_handle *trans,
continue;
}
next = btrfs_find_tree_block(root, bytenr, blocksize);
- if (!next || !btrfs_buffer_uptodate(next)) {
+ if (!next || !btrfs_buffer_uptodate(next, ptr_gen)) {
free_extent_buffer(next);
reada_walk_down(root, cur, path->slots[*level]);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dd403b426ff5..2a3624adc0cf 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1366,7 +1366,7 @@ static int end_bio_extent_writepage(struct bio *bio,
unsigned int bytes_done, int err)
#endif
{
- const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
+ int uptodate = err == 0;
struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
struct extent_state *state = bio->bi_private;
struct extent_io_tree *tree = state->tree;
@@ -1375,6 +1375,7 @@ static int end_bio_extent_writepage(struct bio *bio,
u64 end;
u64 cur;
int whole_page;
+ int ret;
unsigned long flags;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
@@ -1395,17 +1396,30 @@ static int end_bio_extent_writepage(struct bio *bio,
if (--bvec >= bio->bi_io_vec)
prefetchw(&bvec->bv_page->flags);
+ if (tree->ops && tree->ops->writepage_end_io_hook) {
+ ret = tree->ops->writepage_end_io_hook(page, start,
+ end, state);
+ if (ret)
+ uptodate = 0;
+ }
+
+ if (!uptodate && tree->ops &&
+ tree->ops->writepage_io_failed_hook) {
+ ret = tree->ops->writepage_io_failed_hook(bio, page,
+ start, end, state);
+ if (ret == 0) {
+ state = NULL;
+ uptodate = (err == 0);
+ continue;
+ }
+ }
+
if (!uptodate) {
clear_extent_uptodate(tree, start, end, GFP_ATOMIC);
ClearPageUptodate(page);
SetPageError(page);
}
- if (tree->ops && tree->ops->writepage_end_io_hook) {
- tree->ops->writepage_end_io_hook(page, start, end,
- state);
- }
-
/*
* bios can get merged in funny ways, and so we need to
* be careful with the state variable. We know the
@@ -2073,9 +2087,9 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
} else {
ret = 0;
}
- if (ret)
+ if (ret) {
SetPageError(page);
- else {
+ } else {
unsigned long max_nr = end_index + 1;
set_range_writeback(tree, cur, cur + iosize - 1);
if (!PageWriteback(page)) {
@@ -2948,6 +2962,25 @@ int set_extent_buffer_dirty(struct extent_io_tree *tree,
}
EXPORT_SYMBOL(set_extent_buffer_dirty);
+int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
+ struct extent_buffer *eb)
+{
+ unsigned long i;
+ struct page *page;
+ unsigned long num_pages;
+
+ num_pages = num_extent_pages(eb->start, eb->len);
+ eb->flags &= ~EXTENT_UPTODATE;
+
+ clear_extent_uptodate(tree, eb->start, eb->start + eb->len - 1,
+ GFP_NOFS);
+ for (i = 0; i < num_pages; i++) {
+ page = extent_buffer_page(eb, i);
+ ClearPageUptodate(page);
+ }
+ return 0;
+}
+
int set_extent_buffer_uptodate(struct extent_io_tree *tree,
struct extent_buffer *eb)
{
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index e48346147514..f1960dafaa19 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -36,9 +36,12 @@ struct extent_io_ops {
int (*readpage_io_failed_hook)(struct bio *bio, struct page *page,
u64 start, u64 end,
struct extent_state *state);
+ int (*writepage_io_failed_hook)(struct bio *bio, struct page *page,
+ u64 start, u64 end,
+ struct extent_state *state);
int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end,
struct extent_state *state);
- void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
+ int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end,
struct extent_state *state);
int (*set_bit_hook)(struct inode *inode, u64 start, u64 end,
unsigned long old, unsigned long bits);
@@ -212,6 +215,8 @@ int set_extent_buffer_dirty(struct extent_io_tree *tree,
struct extent_buffer *eb);
int set_extent_buffer_uptodate(struct extent_io_tree *tree,
struct extent_buffer *eb);
+int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
+ struct extent_buffer *eb);
int extent_buffer_uptodate(struct extent_io_tree *tree,
struct extent_buffer *eb);
int map_extent_buffer(struct extent_buffer *eb, unsigned long offset,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a492fd238c88..08760ff9bab7 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -430,9 +430,9 @@ struct io_failure_record {
int last_mirror;
};
-int btrfs_readpage_io_failed_hook(struct bio *failed_bio,
- struct page *page, u64 start, u64 end,
- struct extent_state *state)
+int btrfs_io_failed_hook(struct bio *failed_bio,
+ struct page *page, u64 start, u64 end,
+ struct extent_state *state)
{
struct io_failure_record *failrec = NULL;
u64 private;
@@ -443,6 +443,7 @@ int btrfs_readpage_io_failed_hook(struct bio *failed_bio,
struct bio *bio;
int num_copies;
int ret;
+ int rw;
u64 logical;
ret = get_state_private(failure_tree, start, &private);
@@ -505,7 +506,41 @@ int btrfs_readpage_io_failed_hook(struct bio *failed_bio,
bio->bi_bdev = failed_bio->bi_bdev;
bio->bi_size = 0;
bio_add_page(bio, page, failrec->len, start - page_offset(page));
- btrfs_submit_bio_hook(inode, READ, bio, failrec->last_mirror);
+ if (failed_bio->bi_rw & (1 << BIO_RW))
+ rw = WRITE;
+ else
+ rw = READ;
+
+ BTRFS_I(inode)->io_tree.ops->submit_bio_hook(inode, rw, bio,
+ failrec->last_mirror);
+ return 0;
+}
+
+int btrfs_clean_io_failures(struct inode *inode, u64 start)
+{
+ u64 private;
+ u64 private_failure;
+ struct io_failure_record *failure;
+ int ret;
+
+ private = 0;
+ if (count_range_bits(&BTRFS_I(inode)->io_failure_tree, &private,
+ (u64)-1, 1, EXTENT_DIRTY)) {
+ ret = get_state_private(&BTRFS_I(inode)->io_failure_tree,
+ start, &private_failure);
+ if (ret == 0) {
+ failure = (struct io_failure_record *)(unsigned long)
+ private_failure;
+ set_state_private(&BTRFS_I(inode)->io_failure_tree,
+ failure->start, 0);
+ clear_extent_bits(&BTRFS_I(inode)->io_failure_tree,
+ failure->start,
+ failure->start + failure->len - 1,
+ EXTENT_DIRTY | EXTENT_LOCKED,
+ GFP_NOFS);
+ kfree(failure);
+ }
+ }
return 0;
}
@@ -547,26 +582,7 @@ int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end,
/* if the io failure tree for this inode is non-empty,
* check to see if we've recovered from a failed IO
*/
- private = 0;
- if (count_range_bits(&BTRFS_I(inode)->io_failure_tree, &private,
- (u64)-1, 1, EXTENT_DIRTY)) {
- u64 private_failure;
- struct io_failure_record *failure;
- ret = get_state_private(&BTRFS_I(inode)->io_failure_tree,
- start, &private_failure);
- if (ret == 0) {
- failure = (struct io_failure_record *)(unsigned long)
- private_failure;
- set_state_private(&BTRFS_I(inode)->io_failure_tree,
- failure->start, 0);
- clear_extent_bits(&BTRFS_I(inode)->io_failure_tree,
- failure->start,
- failure->start + failure->len - 1,
- EXTENT_DIRTY | EXTENT_LOCKED,
- GFP_NOFS);
- kfree(failure);
- }
- }
+ btrfs_clean_io_failures(inode, start);
return 0;
zeroit:
@@ -3657,7 +3673,7 @@ static struct extent_io_ops btrfs_extent_io_ops = {
.merge_bio_hook = btrfs_merge_bio_hook,
.readpage_io_hook = btrfs_readpage_io_hook,
.readpage_end_io_hook = btrfs_readpage_end_io_hook,
- .readpage_io_failed_hook = btrfs_readpage_io_failed_hook,
+ .readpage_io_failed_hook = btrfs_io_failed_hook,
.set_bit_hook = btrfs_set_bit_hook,
.clear_bit_hook = btrfs_clear_bit_hook,
};
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index 5085e9e693b9..c02e2bf2f028 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -51,6 +51,7 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
struct extent_buffer *next;
struct extent_buffer *cur;
u64 bytenr;
+ u64 ptr_gen;
int ret = 0;
int is_extent = 0;
@@ -93,11 +94,12 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
break;
}
bytenr = btrfs_node_blockptr(cur, path->slots[*level]);
+ ptr_gen = btrfs_node_ptr_generation(cur, path->slots[*level]);
if (cache_only) {
next = btrfs_find_tree_block(root, bytenr,
btrfs_level_size(root, *level - 1));
- if (!next || !btrfs_buffer_uptodate(next) ||
+ if (!next || !btrfs_buffer_uptodate(next, ptr_gen) ||
!btrfs_buffer_defrag(next)) {
free_extent_buffer(next);
path->slots[*level]++;
@@ -106,8 +108,7 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
} else {
next = read_tree_block(root, bytenr,
btrfs_level_size(root, *level - 1),
- btrfs_node_ptr_generation(cur,
- path->slots[*level]));
+ ptr_gen);
}
ret = btrfs_cow_block(trans, root, next, path->nodes[*level],
path->slots[*level], &next);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index b5d7bd1915b4..5fc7fb481474 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1807,14 +1807,19 @@ static int end_bio_multi_stripe(struct bio *bio,
if (atomic_dec_and_test(&multi->stripes_pending)) {
bio->bi_private = multi->private;
bio->bi_end_io = multi->end_io;
-
/* only send an error to the higher layers if it is
* beyond the tolerance of the multi-bio
*/
- if (atomic_read(&multi->error) > multi->max_errors)
+ if (atomic_read(&multi->error) > multi->max_errors) {
err = -EIO;
- else
+ } else if (err) {
+ /*
+ * this bio is actually up to date, we didn't
+ * go over the max number of errors
+ */
+ set_bit(BIO_UPTODATE, &bio->bi_flags);
err = 0;
+ }
kfree(multi);
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 18:57:38 +0000