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| author | Al Viro <viro@zeniv.linux.org.uk> | 2022-05-22 14:59:25 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2022-08-08 22:37:15 -0400 |
| commit | fcb14cb1bdacec5b4374fe161e83fb8208164a85 (patch) | |
| tree | 06b308b8f6b67c65e0c1e90d2e97e61ae66f232a /fs/iomap | |
| parent | fa9db655d0e112c108fe838809608caf759bdf5e (diff) | |
| download | linux-fcb14cb1bdacec5b4374fe161e83fb8208164a85.tar.gz | |
new iov_iter flavour - ITER_UBUF
Equivalent of single-segment iovec. Initialized by iov_iter_ubuf(), checked for by iter_is_ubuf(), otherwise behaves like ITER_IOVEC ones. We are going to expose the things like ->write_iter() et.al. to those in subsequent commits. New predicate (user_backed_iter()) that is true for ITER_IOVEC and ITER_UBUF; places like direct-IO handling should use that for checking that pages we modify after getting them from iov_iter_get_pages() would need to be dirtied. DO NOT assume that replacing iter_is_iovec() with user_backed_iter() will solve all problems - there's code that uses iter_is_iovec() to decide how to poke around in iov_iter guts and for that the predicate replacement obviously won't suffice. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/iomap')
| -rw-r--r-- | fs/iomap/direct-io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index c75d33d5c3ce..4eb559a16c9e 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -533,7 +533,7 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, iomi.flags |= IOMAP_NOWAIT; } - if (iter_is_iovec(iter)) + if (user_backed_iter(iter)) dio->flags |= IOMAP_DIO_DIRTY; } else { iomi.flags |= IOMAP_WRITE; |