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)
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;
* 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;
}
* 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;
}
/*
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;
}
{
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;
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);
* 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);
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);