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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-10 20:38:49 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-10 20:38:49 (GMT) |
| commit | fed41f7d039bad02f94cad9059e4b14cd81d13f2 (patch) | |
| tree | fb9de8dfd1e706a0657e213d5d3cd9368b9e58e4 /fs | |
| parent | abb5a14fa20fdd400995926134b7be9eb8ce6048 (diff) | |
| parent | cd27e455042da85b088bdd3a6e00da1d5b4df9f1 (diff) | |
| download | linux-fed41f7d039bad02f94cad9059e4b14cd81d13f2.tar.xz | |
Merge branch 'work.splice_read' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull splice fixups from Al Viro:
"A couple of fixups for interaction of pipe-backed iov_iter with
O_DIRECT reads + constification of a couple of primitives in uio.h
missed by previous rounds.
Kudos to davej - his fuzzing has caught those bugs"
* 'work.splice_read' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
[btrfs] fix check_direct_IO() for non-iovec iterators
constify iov_iter_count() and iter_is_iovec()
fix ITER_PIPE interaction with direct_IO
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/inode.c | 2 | ||||
| -rw-r--r-- | fs/splice.c | 12 | ||||
| -rw-r--r-- | fs/xfs/xfs_file.c | 2 |
3 files changed, 5 insertions, 11 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 92346a4..a0d3016 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8619,7 +8619,7 @@ static ssize_t check_direct_IO(struct btrfs_root *root, struct kiocb *iocb, goto out; /* If this is a write we don't need to check anymore */ - if (iov_iter_rw(iter) == WRITE) + if (iov_iter_rw(iter) != READ || !iter_is_iovec(iter)) return 0; /* * Check to make sure we don't have duplicate iov_base's in this diff --git a/fs/splice.c b/fs/splice.c index aa38901..153d4f3 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -315,15 +315,9 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos, *ppos = kiocb.ki_pos; file_accessed(in); } else if (ret < 0) { - if (WARN_ON(to.idx != idx || to.iov_offset)) { - /* - * a bogus ->read_iter() has copied something and still - * returned an error instead of a short read. - */ - to.idx = idx; - to.iov_offset = 0; - iov_iter_advance(&to, 0); /* to free what was emitted */ - } + to.idx = idx; + to.iov_offset = 0; + iov_iter_advance(&to, 0); /* to free what was emitted */ /* * callers of ->splice_read() expect -EAGAIN on * "can't put anything in there", rather than -EFAULT. diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 6251168..2bc58b3 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -319,7 +319,7 @@ xfs_file_dio_aio_read( data = *to; ret = __blockdev_direct_IO(iocb, inode, target->bt_bdev, &data, xfs_get_blocks_direct, NULL, NULL, 0); - if (ret > 0) { + if (ret >= 0) { iocb->ki_pos += ret; iov_iter_advance(to, ret); } |