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author | Al Viro <viro@zeniv.linux.org.uk> | 2019-03-08 01:49:55 +0100 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2019-03-18 01:52:27 +0100 |
commit | 2bb874c0d873d13bd9b9b9c6d7b7c4edab18c8b4 (patch) | |
tree | d1bcb3a83388eb45d7508dcd472efe61e85b2b51 /fs/aio.c | |
parent | aio: keep io_event in aio_kiocb (diff) | |
download | linux-2bb874c0d873d13bd9b9b9c6d7b7c4edab18c8b4.tar.xz linux-2bb874c0d873d13bd9b9b9c6d7b7c4edab18c8b4.zip |
aio: store event at final iocb_put()
Instead of having aio_complete() set ->ki_res.{res,res2}, do that
explicitly in its callers, drop the reference (as aio_complete()
used to do) and delay the rest until the final iocb_put().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/aio.c')
-rw-r--r-- | fs/aio.c | 33 |
1 files changed, 17 insertions, 16 deletions
@@ -1077,16 +1077,10 @@ static inline void iocb_destroy(struct aio_kiocb *iocb) kmem_cache_free(kiocb_cachep, iocb); } -static inline void iocb_put(struct aio_kiocb *iocb) -{ - if (refcount_dec_and_test(&iocb->ki_refcnt)) - iocb_destroy(iocb); -} - /* aio_complete * Called when the io request on the given iocb is complete. */ -static void aio_complete(struct aio_kiocb *iocb, long res, long res2) +static void aio_complete(struct aio_kiocb *iocb) { struct kioctx *ctx = iocb->ki_ctx; struct aio_ring *ring; @@ -1094,8 +1088,6 @@ static void aio_complete(struct aio_kiocb *iocb, long res, long res2) unsigned tail, pos, head; unsigned long flags; - iocb->ki_res.res = res; - iocb->ki_res.res2 = res2; /* * Add a completion event to the ring buffer. Must be done holding * ctx->completion_lock to prevent other code from messing with the tail @@ -1161,7 +1153,14 @@ static void aio_complete(struct aio_kiocb *iocb, long res, long res2) if (waitqueue_active(&ctx->wait)) wake_up(&ctx->wait); - iocb_put(iocb); +} + +static inline void iocb_put(struct aio_kiocb *iocb) +{ + if (refcount_dec_and_test(&iocb->ki_refcnt)) { + aio_complete(iocb); + iocb_destroy(iocb); + } } /* aio_read_events_ring @@ -1435,7 +1434,9 @@ static void aio_complete_rw(struct kiocb *kiocb, long res, long res2) file_end_write(kiocb->ki_filp); } - aio_complete(iocb, res, res2); + iocb->ki_res.res = res; + iocb->ki_res.res2 = res2; + iocb_put(iocb); } static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb) @@ -1583,11 +1584,10 @@ static ssize_t aio_write(struct kiocb *req, const struct iocb *iocb, static void aio_fsync_work(struct work_struct *work) { - struct fsync_iocb *req = container_of(work, struct fsync_iocb, work); - int ret; + struct aio_kiocb *iocb = container_of(work, struct aio_kiocb, fsync.work); - ret = vfs_fsync(req->file, req->datasync); - aio_complete(container_of(req, struct aio_kiocb, fsync), ret, 0); + iocb->ki_res.res = vfs_fsync(iocb->fsync.file, iocb->fsync.datasync); + iocb_put(iocb); } static int aio_fsync(struct fsync_iocb *req, const struct iocb *iocb, @@ -1608,7 +1608,8 @@ static int aio_fsync(struct fsync_iocb *req, const struct iocb *iocb, static inline void aio_poll_complete(struct aio_kiocb *iocb, __poll_t mask) { - aio_complete(iocb, mangle_poll(mask), 0); + iocb->ki_res.res = mangle_poll(mask); + iocb_put(iocb); } static void aio_poll_complete_work(struct work_struct *work) |