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authorDylan Yudaken <dylany@meta.com>2023-01-27 05:52:26 -0800
committerJens Axboe <axboe@kernel.dk>2023-01-29 15:18:26 -0700
commitc31cc60fddd11134031e7f9eb76812353cfaac84 (patch)
tree8b8fcbce4f1b835340c20b6b56a15b9c0b8a27dc /io_uring
parentaebb224fd4fc7352cd839ad90414c548387142fd (diff)
io_uring: always go async for unsupported fadvise flags
No point in issuing -> return -EAGAIN -> go async, when it can be done upfront. Signed-off-by: Dylan Yudaken <dylany@meta.com> Link: https://lore.kernel.org/r/20230127135227.3646353-4-dylany@meta.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
-rw-r--r--io_uring/advise.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/io_uring/advise.c b/io_uring/advise.c
index cf600579bffe..7085804c513c 100644
--- a/io_uring/advise.c
+++ b/io_uring/advise.c
@@ -62,6 +62,18 @@ int io_madvise(struct io_kiocb *req, unsigned int issue_flags)
#endif
}
+static bool io_fadvise_force_async(struct io_fadvise *fa)
+{
+ switch (fa->advice) {
+ case POSIX_FADV_NORMAL:
+ case POSIX_FADV_RANDOM:
+ case POSIX_FADV_SEQUENTIAL:
+ return false;
+ default:
+ return true;
+ }
+}
+
int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise);
@@ -72,6 +84,8 @@ int io_fadvise_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
fa->offset = READ_ONCE(sqe->off);
fa->len = READ_ONCE(sqe->len);
fa->advice = READ_ONCE(sqe->fadvise_advice);
+ if (io_fadvise_force_async(fa))
+ req->flags |= REQ_F_FORCE_ASYNC;
return 0;
}
@@ -80,16 +94,7 @@ int io_fadvise(struct io_kiocb *req, unsigned int issue_flags)
struct io_fadvise *fa = io_kiocb_to_cmd(req, struct io_fadvise);
int ret;
- if (issue_flags & IO_URING_F_NONBLOCK) {
- switch (fa->advice) {
- case POSIX_FADV_NORMAL:
- case POSIX_FADV_RANDOM:
- case POSIX_FADV_SEQUENTIAL:
- break;
- default:
- return -EAGAIN;
- }
- }
+ WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK && io_fadvise_force_async(fa));
ret = vfs_fadvise(req->file, fa->offset, fa->len, fa->advice);
if (ret < 0)