diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/file.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 5113e3d60f78..805dd86d8527 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1652,8 +1652,9 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb, bool force_page_uptodate = false; loff_t old_isize = i_size_read(inode); unsigned int ilock_flags = 0; + const bool nowait = (iocb->ki_flags & IOCB_NOWAIT); - if (iocb->ki_flags & IOCB_NOWAIT) + if (nowait) ilock_flags |= BTRFS_ILOCK_TRY; ret = btrfs_inode_lock(inode, ilock_flags); @@ -1709,17 +1710,22 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb, extent_changeset_release(data_reserved); ret = btrfs_check_data_free_space(BTRFS_I(inode), &data_reserved, pos, - write_bytes, false); + write_bytes, nowait); if (ret < 0) { int can_nocow; + if (nowait && (ret == -ENOSPC || ret == -EAGAIN)) { + ret = -EAGAIN; + break; + } + /* * If we don't have to COW at the offset, reserve * metadata only. write_bytes may get smaller than * requested here. */ can_nocow = btrfs_check_nocow_lock(BTRFS_I(inode), pos, - &write_bytes, false); + &write_bytes, nowait); if (can_nocow < 0) ret = can_nocow; if (can_nocow > 0) @@ -1736,7 +1742,7 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb, WARN_ON(reserve_bytes == 0); ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), reserve_bytes, - reserve_bytes, false); + reserve_bytes, nowait); if (ret) { if (!only_release_metadata) btrfs_free_reserved_data_space(BTRFS_I(inode), @@ -1765,10 +1771,11 @@ again: extents_locked = lock_and_cleanup_extent_if_need( BTRFS_I(inode), pages, num_pages, pos, write_bytes, &lockstart, - &lockend, false, &cached_state); + &lockend, nowait, &cached_state); if (extents_locked < 0) { - if (extents_locked == -EAGAIN) + if (!nowait && extents_locked == -EAGAIN) goto again; + btrfs_delalloc_release_extents(BTRFS_I(inode), reserve_bytes); ret = extents_locked; |