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author | Alan Somers <asomers@FreeBSD.org> | 2017-07-21 15:09:24 +0000 |
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committer | Alan Somers <asomers@FreeBSD.org> | 2017-07-21 15:09:24 +0000 |
commit | 18ddf67c64167ae2af2a77df3c2587547acc51ff (patch) | |
tree | 7bb1d404bae77b8a30c332fa7c032c150f4515ab /lib | |
parent | 1ec31f2c6fa2c12bc7e8ee1de157abf0e74c95de (diff) | |
download | src-18ddf67c64167ae2af2a77df3c2587547acc51ff.tar.gz src-18ddf67c64167ae2af2a77df3c2587547acc51ff.zip |
Implement SIGEV_THREAD notifications for lio_listio(2)
Our man pages have always indicated that this was supported, but in fact the
feature was never implemented for lio_listio(2).
Reviewed by: jhb, kib (earlier version)
MFC after: 20 days
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D11680
Notes
Notes:
svn path=/head/; revision=321332
Diffstat (limited to 'lib')
-rw-r--r-- | lib/librt/Symbol.map | 1 | ||||
-rw-r--r-- | lib/librt/aio.c | 47 |
2 files changed, 40 insertions, 8 deletions
diff --git a/lib/librt/Symbol.map b/lib/librt/Symbol.map index a4a88b947070..c11b88397afd 100644 --- a/lib/librt/Symbol.map +++ b/lib/librt/Symbol.map @@ -26,6 +26,7 @@ FBSD_1.0 { }; FBSD_1.5 { + lio_listio; mq_getfd_np; timer_oshandle_np; }; diff --git a/lib/librt/aio.c b/lib/librt/aio.c index af88cf3affdd..fd26a9f68e53 100644 --- a/lib/librt/aio.c +++ b/lib/librt/aio.c @@ -44,6 +44,7 @@ __weak_reference(__aio_write, aio_write); __weak_reference(__aio_return, aio_return); __weak_reference(__aio_waitcomplete, aio_waitcomplete); __weak_reference(__aio_fsync, aio_fsync); +__weak_reference(__lio_listio, lio_listio); typedef void (*aio_func)(union sigval val, struct aiocb *iocb); @@ -53,6 +54,8 @@ extern ssize_t __sys_aio_waitcomplete(struct aiocb **iocbp, struct timespec *tim extern ssize_t __sys_aio_return(struct aiocb *iocb); extern int __sys_aio_error(struct aiocb *iocb); extern int __sys_aio_fsync(int op, struct aiocb *iocb); +extern int __sys_lio_listio(int mode, struct aiocb * const list[], int nent, + struct sigevent *sig); static void aio_dispatch(struct sigev_node *sn) @@ -63,8 +66,8 @@ aio_dispatch(struct sigev_node *sn) } static int -aio_sigev_alloc(struct aiocb *iocb, struct sigev_node **sn, - struct sigevent *saved_ev) +aio_sigev_alloc(sigev_id_t id, struct sigevent *sigevent, + struct sigev_node **sn, struct sigevent *saved_ev) { if (__sigev_check_init()) { /* This might be that thread library is not enabled. */ @@ -72,15 +75,15 @@ aio_sigev_alloc(struct aiocb *iocb, struct sigev_node **sn, return (-1); } - *sn = __sigev_alloc(SI_ASYNCIO, &iocb->aio_sigevent, NULL, 1); + *sn = __sigev_alloc(SI_ASYNCIO, sigevent, NULL, 1); if (*sn == NULL) { errno = EAGAIN; return (-1); } - *saved_ev = iocb->aio_sigevent; - (*sn)->sn_id = (sigev_id_t)iocb; - __sigev_get_sigevent(*sn, &iocb->aio_sigevent, (*sn)->sn_id); + *saved_ev = *sigevent; + (*sn)->sn_id = id; + __sigev_get_sigevent(*sn, sigevent, (*sn)->sn_id); (*sn)->sn_dispatch = aio_dispatch; __sigev_list_lock(); @@ -102,7 +105,8 @@ aio_io(struct aiocb *iocb, int (*sysfunc)(struct aiocb *iocb)) return (ret); } - ret = aio_sigev_alloc(iocb, &sn, &saved_ev); + ret = aio_sigev_alloc((sigev_id_t)iocb, &iocb->aio_sigevent, &sn, + &saved_ev); if (ret) return (ret); ret = sysfunc(iocb); @@ -183,7 +187,8 @@ __aio_fsync(int op, struct aiocb *iocb) if (iocb->aio_sigevent.sigev_notify != SIGEV_THREAD) return __sys_aio_fsync(op, iocb); - ret = aio_sigev_alloc(iocb, &sn, &saved_ev); + ret = aio_sigev_alloc((sigev_id_t)iocb, &iocb->aio_sigevent, &sn, + &saved_ev); if (ret) return (ret); ret = __sys_aio_fsync(op, iocb); @@ -197,3 +202,29 @@ __aio_fsync(int op, struct aiocb *iocb) } return (ret); } + +int +__lio_listio(int mode, struct aiocb * const list[], int nent, + struct sigevent *sig) +{ + struct sigev_node *sn; + struct sigevent saved_ev; + int ret, err; + + if (sig == NULL || sig->sigev_notify != SIGEV_THREAD) + return (__sys_lio_listio(mode, list, nent, sig)); + + ret = aio_sigev_alloc((sigev_id_t)list, sig, &sn, &saved_ev); + if (ret) + return (ret); + ret = __sys_lio_listio(mode, list, nent, sig); + *sig = saved_ev; + if (ret != 0) { + err = errno; + __sigev_list_lock(); + __sigev_delete_node(sn); + __sigev_list_unlock(); + errno = err; + } + return (ret); +} |