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authorLinus Torvalds <torvalds@linux-foundation.org>2015-09-25 22:08:41 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-25 22:08:41 +0300
commit03e8f644868f147e021e8660346890e731c2e435 (patch)
tree18d356289c92ec6802085936ed824150d12a3241 /fs/btrfs/inode.c
parent101688f534fd322520678a184fdfedc7a21741fc (diff)
parent2b9dbef272b63c561aab0a5be34fd428f7b710f5 (diff)
downloadlinux-03e8f644868f147e021e8660346890e731c2e435.tar.xz
Merge branch 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason: "This is an assorted set I've been queuing up: Jeff Mahoney tracked down a tricky one where we ended up starting IO on the wrong mapping for special files in btrfs_evict_inode. A few people reported this one on the list. Filipe found (and provided a test for) a difficult bug in reading compressed extents, and Josef fixed up some quota record keeping with snapshot deletion. Chandan killed off an accounting bug during DIO that lead to WARN_ONs as we freed inodes" * 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: keep dropped roots in cache until transaction commit Btrfs: Direct I/O: Fix space accounting btrfs: skip waiting on ordered range for special files Btrfs: fix read corruption of compressed and shared extents Btrfs: remove unnecessary locking of cleaner_mutex to avoid deadlock Btrfs: don't initialize a space info as full to prevent ENOSPC
Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c45
1 files changed, 23 insertions, 22 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a0fa7253a2d7..611b66d73e80 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5084,7 +5084,8 @@ void btrfs_evict_inode(struct inode *inode)
goto no_delete;
}
/* do we really want it for ->i_nlink > 0 and zero btrfs_root_refs? */
- btrfs_wait_ordered_range(inode, 0, (u64)-1);
+ if (!special_file(inode->i_mode))
+ btrfs_wait_ordered_range(inode, 0, (u64)-1);
btrfs_free_io_failure_record(inode, 0, (u64)-1);
@@ -7408,6 +7409,10 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
return em;
}
+struct btrfs_dio_data {
+ u64 outstanding_extents;
+ u64 reserve;
+};
static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
@@ -7415,10 +7420,10 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
struct extent_map *em;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_state *cached_state = NULL;
+ struct btrfs_dio_data *dio_data = NULL;
u64 start = iblock << inode->i_blkbits;
u64 lockstart, lockend;
u64 len = bh_result->b_size;
- u64 *outstanding_extents = NULL;
int unlock_bits = EXTENT_LOCKED;
int ret = 0;
@@ -7436,7 +7441,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
* that anything that needs to check if there's a transction doesn't get
* confused.
*/
- outstanding_extents = current->journal_info;
+ dio_data = current->journal_info;
current->journal_info = NULL;
}
@@ -7568,17 +7573,18 @@ unlock:
* within our reservation, otherwise we need to adjust our inode
* counter appropriately.
*/
- if (*outstanding_extents) {
- (*outstanding_extents)--;
+ if (dio_data->outstanding_extents) {
+ (dio_data->outstanding_extents)--;
} else {
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->lock);
}
- current->journal_info = outstanding_extents;
btrfs_free_reserved_data_space(inode, len);
- set_bit(BTRFS_INODE_DIO_READY, &BTRFS_I(inode)->runtime_flags);
+ WARN_ON(dio_data->reserve < len);
+ dio_data->reserve -= len;
+ current->journal_info = dio_data;
}
/*
@@ -7601,8 +7607,8 @@ unlock:
unlock_err:
clear_extent_bit(&BTRFS_I(inode)->io_tree, lockstart, lockend,
unlock_bits, 1, 0, &cached_state, GFP_NOFS);
- if (outstanding_extents)
- current->journal_info = outstanding_extents;
+ if (dio_data)
+ current->journal_info = dio_data;
return ret;
}
@@ -8329,7 +8335,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
- u64 outstanding_extents = 0;
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct btrfs_dio_data dio_data = { 0 };
size_t count = 0;
int flags = 0;
bool wakeup = true;
@@ -8367,7 +8374,7 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
ret = btrfs_delalloc_reserve_space(inode, count);
if (ret)
goto out;
- outstanding_extents = div64_u64(count +
+ dio_data.outstanding_extents = div64_u64(count +
BTRFS_MAX_EXTENT_SIZE - 1,
BTRFS_MAX_EXTENT_SIZE);
@@ -8376,7 +8383,8 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
* do the accounting properly if we go over the number we
* originally calculated. Abuse current->journal_info for this.
*/
- current->journal_info = &outstanding_extents;
+ dio_data.reserve = round_up(count, root->sectorsize);
+ current->journal_info = &dio_data;
} else if (test_bit(BTRFS_INODE_READDIO_NEED_LOCK,
&BTRFS_I(inode)->runtime_flags)) {
inode_dio_end(inode);
@@ -8391,16 +8399,9 @@ static ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
if (iov_iter_rw(iter) == WRITE) {
current->journal_info = NULL;
if (ret < 0 && ret != -EIOCBQUEUED) {
- /*
- * If the error comes from submitting stage,
- * btrfs_get_blocsk_direct() has free'd data space,
- * and metadata space will be handled by
- * finish_ordered_fn, don't do that again to make
- * sure bytes_may_use is correct.
- */
- if (!test_and_clear_bit(BTRFS_INODE_DIO_READY,
- &BTRFS_I(inode)->runtime_flags))
- btrfs_delalloc_release_space(inode, count);
+ if (dio_data.reserve)
+ btrfs_delalloc_release_space(inode,
+ dio_data.reserve);
} else if (ret >= 0 && (size_t)ret < count)
btrfs_delalloc_release_space(inode,
count - (size_t)ret);