diff options
Diffstat (limited to 'sys/kern/vfs_aio.c')
| -rw-r--r-- | sys/kern/vfs_aio.c | 3018 |
1 files changed, 3018 insertions, 0 deletions
diff --git a/sys/kern/vfs_aio.c b/sys/kern/vfs_aio.c new file mode 100644 index 0000000..99b0197 --- /dev/null +++ b/sys/kern/vfs_aio.c @@ -0,0 +1,3018 @@ +/*- + * Copyright (c) 1997 John S. Dyson. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. John S. Dyson's name may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * DISCLAIMER: This code isn't warranted to do anything useful. Anything + * bad that happens because of using this software isn't the responsibility + * of the author. This software is distributed AS-IS. + */ + +/* + * This file contains support for the POSIX 1003.1B AIO/LIO facility. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_compat.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/bio.h> +#include <sys/buf.h> +#include <sys/capability.h> +#include <sys/eventhandler.h> +#include <sys/sysproto.h> +#include <sys/filedesc.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/kthread.h> +#include <sys/fcntl.h> +#include <sys/file.h> +#include <sys/limits.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/unistd.h> +#include <sys/posix4.h> +#include <sys/proc.h> +#include <sys/resourcevar.h> +#include <sys/signalvar.h> +#include <sys/protosw.h> +#include <sys/sema.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/syscall.h> +#include <sys/sysent.h> +#include <sys/sysctl.h> +#include <sys/sx.h> +#include <sys/taskqueue.h> +#include <sys/vnode.h> +#include <sys/conf.h> +#include <sys/event.h> +#include <sys/mount.h> + +#include <machine/atomic.h> + +#include <vm/vm.h> +#include <vm/vm_extern.h> +#include <vm/pmap.h> +#include <vm/vm_map.h> +#include <vm/vm_object.h> +#include <vm/uma.h> +#include <sys/aio.h> + +#include "opt_vfs_aio.h" + +/* + * Counter for allocating reference ids to new jobs. Wrapped to 1 on + * overflow. (XXX will be removed soon.) + */ +static u_long jobrefid; + +/* + * Counter for aio_fsync. + */ +static uint64_t jobseqno; + +#define JOBST_NULL 0 +#define JOBST_JOBQSOCK 1 +#define JOBST_JOBQGLOBAL 2 +#define JOBST_JOBRUNNING 3 +#define JOBST_JOBFINISHED 4 +#define JOBST_JOBQBUF 5 +#define JOBST_JOBQSYNC 6 + +#ifndef MAX_AIO_PER_PROC +#define MAX_AIO_PER_PROC 32 +#endif + +#ifndef MAX_AIO_QUEUE_PER_PROC +#define MAX_AIO_QUEUE_PER_PROC 256 /* Bigger than AIO_LISTIO_MAX */ +#endif + +#ifndef MAX_AIO_PROCS +#define MAX_AIO_PROCS 32 +#endif + +#ifndef MAX_AIO_QUEUE +#define MAX_AIO_QUEUE 1024 /* Bigger than AIO_LISTIO_MAX */ +#endif + +#ifndef TARGET_AIO_PROCS +#define TARGET_AIO_PROCS 4 +#endif + +#ifndef MAX_BUF_AIO +#define MAX_BUF_AIO 16 +#endif + +#ifndef AIOD_TIMEOUT_DEFAULT +#define AIOD_TIMEOUT_DEFAULT (10 * hz) +#endif + +#ifndef AIOD_LIFETIME_DEFAULT +#define AIOD_LIFETIME_DEFAULT (30 * hz) +#endif + +FEATURE(aio, "Asynchronous I/O"); + +static MALLOC_DEFINE(M_LIO, "lio", "listio aio control block list"); + +static SYSCTL_NODE(_vfs, OID_AUTO, aio, CTLFLAG_RW, 0, "Async IO management"); + +static int max_aio_procs = MAX_AIO_PROCS; +SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_procs, + CTLFLAG_RW, &max_aio_procs, 0, + "Maximum number of kernel threads to use for handling async IO "); + +static int num_aio_procs = 0; +SYSCTL_INT(_vfs_aio, OID_AUTO, num_aio_procs, + CTLFLAG_RD, &num_aio_procs, 0, + "Number of presently active kernel threads for async IO"); + +/* + * The code will adjust the actual number of AIO processes towards this + * number when it gets a chance. + */ +static int target_aio_procs = TARGET_AIO_PROCS; +SYSCTL_INT(_vfs_aio, OID_AUTO, target_aio_procs, CTLFLAG_RW, &target_aio_procs, + 0, "Preferred number of ready kernel threads for async IO"); + +static int max_queue_count = MAX_AIO_QUEUE; +SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue, CTLFLAG_RW, &max_queue_count, 0, + "Maximum number of aio requests to queue, globally"); + +static int num_queue_count = 0; +SYSCTL_INT(_vfs_aio, OID_AUTO, num_queue_count, CTLFLAG_RD, &num_queue_count, 0, + "Number of queued aio requests"); + +static int num_buf_aio = 0; +SYSCTL_INT(_vfs_aio, OID_AUTO, num_buf_aio, CTLFLAG_RD, &num_buf_aio, 0, + "Number of aio requests presently handled by the buf subsystem"); + +/* Number of async I/O thread in the process of being started */ +/* XXX This should be local to aio_aqueue() */ +static int num_aio_resv_start = 0; + +static int aiod_timeout; +SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_timeout, CTLFLAG_RW, &aiod_timeout, 0, + "Timeout value for synchronous aio operations"); + +static int aiod_lifetime; +SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_lifetime, CTLFLAG_RW, &aiod_lifetime, 0, + "Maximum lifetime for idle aiod"); + +static int unloadable = 0; +SYSCTL_INT(_vfs_aio, OID_AUTO, unloadable, CTLFLAG_RW, &unloadable, 0, + "Allow unload of aio (not recommended)"); + + +static int max_aio_per_proc = MAX_AIO_PER_PROC; +SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_per_proc, CTLFLAG_RW, &max_aio_per_proc, + 0, "Maximum active aio requests per process (stored in the process)"); + +static int max_aio_queue_per_proc = MAX_AIO_QUEUE_PER_PROC; +SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue_per_proc, CTLFLAG_RW, + &max_aio_queue_per_proc, 0, + "Maximum queued aio requests per process (stored in the process)"); + +static int max_buf_aio = MAX_BUF_AIO; +SYSCTL_INT(_vfs_aio, OID_AUTO, max_buf_aio, CTLFLAG_RW, &max_buf_aio, 0, + "Maximum buf aio requests per process (stored in the process)"); + +typedef struct oaiocb { + int aio_fildes; /* File descriptor */ + off_t aio_offset; /* File offset for I/O */ + volatile void *aio_buf; /* I/O buffer in process space */ + size_t aio_nbytes; /* Number of bytes for I/O */ + struct osigevent aio_sigevent; /* Signal to deliver */ + int aio_lio_opcode; /* LIO opcode */ + int aio_reqprio; /* Request priority -- ignored */ + struct __aiocb_private _aiocb_private; +} oaiocb_t; + +/* + * Below is a key of locks used to protect each member of struct aiocblist + * aioliojob and kaioinfo and any backends. + * + * * - need not protected + * a - locked by kaioinfo lock + * b - locked by backend lock, the backend lock can be null in some cases, + * for example, BIO belongs to this type, in this case, proc lock is + * reused. + * c - locked by aio_job_mtx, the lock for the generic file I/O backend. + */ + +/* + * Current, there is only two backends: BIO and generic file I/O. + * socket I/O is served by generic file I/O, this is not a good idea, since + * disk file I/O and any other types without O_NONBLOCK flag can block daemon + * threads, if there is no thread to serve socket I/O, the socket I/O will be + * delayed too long or starved, we should create some threads dedicated to + * sockets to do non-blocking I/O, same for pipe and fifo, for these I/O + * systems we really need non-blocking interface, fiddling O_NONBLOCK in file + * structure is not safe because there is race between userland and aio + * daemons. + */ + +struct aiocblist { + TAILQ_ENTRY(aiocblist) list; /* (b) internal list of for backend */ + TAILQ_ENTRY(aiocblist) plist; /* (a) list of jobs for each backend */ + TAILQ_ENTRY(aiocblist) allist; /* (a) list of all jobs in proc */ + int jobflags; /* (a) job flags */ + int jobstate; /* (b) job state */ + int inputcharge; /* (*) input blockes */ + int outputcharge; /* (*) output blockes */ + struct buf *bp; /* (*) private to BIO backend, + * buffer pointer + */ + struct proc *userproc; /* (*) user process */ + struct ucred *cred; /* (*) active credential when created */ + struct file *fd_file; /* (*) pointer to file structure */ + struct aioliojob *lio; /* (*) optional lio job */ + struct aiocb *uuaiocb; /* (*) pointer in userspace of aiocb */ + struct knlist klist; /* (a) list of knotes */ + struct aiocb uaiocb; /* (*) kernel I/O control block */ + ksiginfo_t ksi; /* (a) realtime signal info */ + struct task biotask; /* (*) private to BIO backend */ + uint64_t seqno; /* (*) job number */ + int pending; /* (a) number of pending I/O, aio_fsync only */ +}; + +/* jobflags */ +#define AIOCBLIST_DONE 0x01 +#define AIOCBLIST_BUFDONE 0x02 +#define AIOCBLIST_RUNDOWN 0x04 +#define AIOCBLIST_CHECKSYNC 0x08 + +/* + * AIO process info + */ +#define AIOP_FREE 0x1 /* proc on free queue */ + +struct aiothreadlist { + int aiothreadflags; /* (c) AIO proc flags */ + TAILQ_ENTRY(aiothreadlist) list; /* (c) list of processes */ + struct thread *aiothread; /* (*) the AIO thread */ +}; + +/* + * data-structure for lio signal management + */ +struct aioliojob { + int lioj_flags; /* (a) listio flags */ + int lioj_count; /* (a) listio flags */ + int lioj_finished_count; /* (a) listio flags */ + struct sigevent lioj_signal; /* (a) signal on all I/O done */ + TAILQ_ENTRY(aioliojob) lioj_list; /* (a) lio list */ + struct knlist klist; /* (a) list of knotes */ + ksiginfo_t lioj_ksi; /* (a) Realtime signal info */ +}; + +#define LIOJ_SIGNAL 0x1 /* signal on all done (lio) */ +#define LIOJ_SIGNAL_POSTED 0x2 /* signal has been posted */ +#define LIOJ_KEVENT_POSTED 0x4 /* kevent triggered */ + +/* + * per process aio data structure + */ +struct kaioinfo { + struct mtx kaio_mtx; /* the lock to protect this struct */ + int kaio_flags; /* (a) per process kaio flags */ + int kaio_maxactive_count; /* (*) maximum number of AIOs */ + int kaio_active_count; /* (c) number of currently used AIOs */ + int kaio_qallowed_count; /* (*) maxiumu size of AIO queue */ + int kaio_count; /* (a) size of AIO queue */ + int kaio_ballowed_count; /* (*) maximum number of buffers */ + int kaio_buffer_count; /* (a) number of physio buffers */ + TAILQ_HEAD(,aiocblist) kaio_all; /* (a) all AIOs in the process */ + TAILQ_HEAD(,aiocblist) kaio_done; /* (a) done queue for process */ + TAILQ_HEAD(,aioliojob) kaio_liojoblist; /* (a) list of lio jobs */ + TAILQ_HEAD(,aiocblist) kaio_jobqueue; /* (a) job queue for process */ + TAILQ_HEAD(,aiocblist) kaio_bufqueue; /* (a) buffer job queue for process */ + TAILQ_HEAD(,aiocblist) kaio_sockqueue; /* (a) queue for aios waiting on sockets, + * NOT USED YET. + */ + TAILQ_HEAD(,aiocblist) kaio_syncqueue; /* (a) queue for aio_fsync */ + struct task kaio_task; /* (*) task to kick aio threads */ +}; + +#define AIO_LOCK(ki) mtx_lock(&(ki)->kaio_mtx) +#define AIO_UNLOCK(ki) mtx_unlock(&(ki)->kaio_mtx) +#define AIO_LOCK_ASSERT(ki, f) mtx_assert(&(ki)->kaio_mtx, (f)) +#define AIO_MTX(ki) (&(ki)->kaio_mtx) + +#define KAIO_RUNDOWN 0x1 /* process is being run down */ +#define KAIO_WAKEUP 0x2 /* wakeup process when there is a significant event */ + +/* + * Operations used to interact with userland aio control blocks. + * Different ABIs provide their own operations. + */ +struct aiocb_ops { + int (*copyin)(struct aiocb *ujob, struct aiocb *kjob); + long (*fetch_status)(struct aiocb *ujob); + long (*fetch_error)(struct aiocb *ujob); + int (*store_status)(struct aiocb *ujob, long status); + int (*store_error)(struct aiocb *ujob, long error); + int (*store_kernelinfo)(struct aiocb *ujob, long jobref); + int (*store_aiocb)(struct aiocb **ujobp, struct aiocb *ujob); +}; + +static TAILQ_HEAD(,aiothreadlist) aio_freeproc; /* (c) Idle daemons */ +static struct sema aio_newproc_sem; +static struct mtx aio_job_mtx; +static struct mtx aio_sock_mtx; +static TAILQ_HEAD(,aiocblist) aio_jobs; /* (c) Async job list */ +static struct unrhdr *aiod_unr; + +void aio_init_aioinfo(struct proc *p); +static int aio_onceonly(void); +static int aio_free_entry(struct aiocblist *aiocbe); +static void aio_process(struct aiocblist *aiocbe); +static int aio_newproc(int *); +int aio_aqueue(struct thread *td, struct aiocb *job, + struct aioliojob *lio, int type, struct aiocb_ops *ops); +static void aio_physwakeup(struct buf *bp); +static void aio_proc_rundown(void *arg, struct proc *p); +static void aio_proc_rundown_exec(void *arg, struct proc *p, struct image_params *imgp); +static int aio_qphysio(struct proc *p, struct aiocblist *iocb); +static void biohelper(void *, int); +static void aio_daemon(void *param); +static void aio_swake_cb(struct socket *, struct sockbuf *); +static int aio_unload(void); +static void aio_bio_done_notify(struct proc *userp, struct aiocblist *aiocbe, int type); +#define DONE_BUF 1 +#define DONE_QUEUE 2 +static int aio_kick(struct proc *userp); +static void aio_kick_nowait(struct proc *userp); +static void aio_kick_helper(void *context, int pending); +static int filt_aioattach(struct knote *kn); +static void filt_aiodetach(struct knote *kn); +static int filt_aio(struct knote *kn, long hint); +static int filt_lioattach(struct knote *kn); +static void filt_liodetach(struct knote *kn); +static int filt_lio(struct knote *kn, long hint); + +/* + * Zones for: + * kaio Per process async io info + * aiop async io thread data + * aiocb async io jobs + * aiol list io job pointer - internal to aio_suspend XXX + * aiolio list io jobs + */ +static uma_zone_t kaio_zone, aiop_zone, aiocb_zone, aiol_zone, aiolio_zone; + +/* kqueue filters for aio */ +static struct filterops aio_filtops = { + .f_isfd = 0, + .f_attach = filt_aioattach, + .f_detach = filt_aiodetach, + .f_event = filt_aio, +}; +static struct filterops lio_filtops = { + .f_isfd = 0, + .f_attach = filt_lioattach, + .f_detach = filt_liodetach, + .f_event = filt_lio +}; + +static eventhandler_tag exit_tag, exec_tag; + +TASKQUEUE_DEFINE_THREAD(aiod_bio); + +/* + * Main operations function for use as a kernel module. + */ +static int +aio_modload(struct module *module, int cmd, void *arg) +{ + int error = 0; + + switch (cmd) { + case MOD_LOAD: + aio_onceonly(); + break; + case MOD_UNLOAD: + error = aio_unload(); + break; + case MOD_SHUTDOWN: + break; + default: + error = EINVAL; + break; + } + return (error); +} + +static moduledata_t aio_mod = { + "aio", + &aio_modload, + NULL +}; + +static struct syscall_helper_data aio_syscalls[] = { + SYSCALL_INIT_HELPER(aio_cancel), + SYSCALL_INIT_HELPER(aio_error), + SYSCALL_INIT_HELPER(aio_fsync), + SYSCALL_INIT_HELPER(aio_read), + SYSCALL_INIT_HELPER(aio_return), + SYSCALL_INIT_HELPER(aio_suspend), + SYSCALL_INIT_HELPER(aio_waitcomplete), + SYSCALL_INIT_HELPER(aio_write), + SYSCALL_INIT_HELPER(lio_listio), + SYSCALL_INIT_HELPER(oaio_read), + SYSCALL_INIT_HELPER(oaio_write), + SYSCALL_INIT_HELPER(olio_listio), + SYSCALL_INIT_LAST +}; + +#ifdef COMPAT_FREEBSD32 +#include <sys/mount.h> +#include <sys/socket.h> +#include <compat/freebsd32/freebsd32.h> +#include <compat/freebsd32/freebsd32_proto.h> +#include <compat/freebsd32/freebsd32_signal.h> +#include <compat/freebsd32/freebsd32_syscall.h> +#include <compat/freebsd32/freebsd32_util.h> + +static struct syscall_helper_data aio32_syscalls[] = { + SYSCALL32_INIT_HELPER(freebsd32_aio_return), + SYSCALL32_INIT_HELPER(freebsd32_aio_suspend), + SYSCALL32_INIT_HELPER(freebsd32_aio_cancel), + SYSCALL32_INIT_HELPER(freebsd32_aio_error), + SYSCALL32_INIT_HELPER(freebsd32_aio_fsync), + SYSCALL32_INIT_HELPER(freebsd32_aio_read), + SYSCALL32_INIT_HELPER(freebsd32_aio_write), + SYSCALL32_INIT_HELPER(freebsd32_aio_waitcomplete), + SYSCALL32_INIT_HELPER(freebsd32_lio_listio), + SYSCALL32_INIT_HELPER(freebsd32_oaio_read), + SYSCALL32_INIT_HELPER(freebsd32_oaio_write), + SYSCALL32_INIT_HELPER(freebsd32_olio_listio), + SYSCALL_INIT_LAST +}; +#endif + +DECLARE_MODULE(aio, aio_mod, + SI_SUB_VFS, SI_ORDER_ANY); +MODULE_VERSION(aio, 1); + +/* + * Startup initialization + */ +static int +aio_onceonly(void) +{ + int error; + + /* XXX: should probably just use so->callback */ + aio_swake = &aio_swake_cb; + exit_tag = EVENTHANDLER_REGISTER(process_exit, aio_proc_rundown, NULL, + EVENTHANDLER_PRI_ANY); + exec_tag = EVENTHANDLER_REGISTER(process_exec, aio_proc_rundown_exec, NULL, + EVENTHANDLER_PRI_ANY); + kqueue_add_filteropts(EVFILT_AIO, &aio_filtops); + kqueue_add_filteropts(EVFILT_LIO, &lio_filtops); + TAILQ_INIT(&aio_freeproc); + sema_init(&aio_newproc_sem, 0, "aio_new_proc"); + mtx_init(&aio_job_mtx, "aio_job", NULL, MTX_DEF); + mtx_init(&aio_sock_mtx, "aio_sock", NULL, MTX_DEF); + TAILQ_INIT(&aio_jobs); + aiod_unr = new_unrhdr(1, INT_MAX, NULL); + kaio_zone = uma_zcreate("AIO", sizeof(struct kaioinfo), NULL, NULL, + NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); + aiop_zone = uma_zcreate("AIOP", sizeof(struct aiothreadlist), NULL, + NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); + aiocb_zone = uma_zcreate("AIOCB", sizeof(struct aiocblist), NULL, NULL, + NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); + aiol_zone = uma_zcreate("AIOL", AIO_LISTIO_MAX*sizeof(intptr_t) , NULL, + NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); + aiolio_zone = uma_zcreate("AIOLIO", sizeof(struct aioliojob), NULL, + NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); + aiod_timeout = AIOD_TIMEOUT_DEFAULT; + aiod_lifetime = AIOD_LIFETIME_DEFAULT; + jobrefid = 1; + async_io_version = _POSIX_VERSION; + p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, AIO_LISTIO_MAX); + p31b_setcfg(CTL_P1003_1B_AIO_MAX, MAX_AIO_QUEUE); + p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, 0); + + error = syscall_helper_register(aio_syscalls); + if (error) + return (error); +#ifdef COMPAT_FREEBSD32 + error = syscall32_helper_register(aio32_syscalls); + if (error) + return (error); +#endif + return (0); +} + +/* + * Callback for unload of AIO when used as a module. + */ +static int +aio_unload(void) +{ + int error; + + /* + * XXX: no unloads by default, it's too dangerous. + * perhaps we could do it if locked out callers and then + * did an aio_proc_rundown() on each process. + * + * jhb: aio_proc_rundown() needs to run on curproc though, + * so I don't think that would fly. + */ + if (!unloadable) + return (EOPNOTSUPP); + +#ifdef COMPAT_FREEBSD32 + syscall32_helper_unregister(aio32_syscalls); +#endif + syscall_helper_unregister(aio_syscalls); + + error = kqueue_del_filteropts(EVFILT_AIO); + if (error) + return error; + error = kqueue_del_filteropts(EVFILT_LIO); + if (error) + return error; + async_io_version = 0; + aio_swake = NULL; + taskqueue_free(taskqueue_aiod_bio); + delete_unrhdr(aiod_unr); + uma_zdestroy(kaio_zone); + uma_zdestroy(aiop_zone); + uma_zdestroy(aiocb_zone); + uma_zdestroy(aiol_zone); + uma_zdestroy(aiolio_zone); + EVENTHANDLER_DEREGISTER(process_exit, exit_tag); + EVENTHANDLER_DEREGISTER(process_exec, exec_tag); + mtx_destroy(&aio_job_mtx); + mtx_destroy(&aio_sock_mtx); + sema_destroy(&aio_newproc_sem); + p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1); + p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1); + p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1); + return (0); +} + +/* + * Init the per-process aioinfo structure. The aioinfo limits are set + * per-process for user limit (resource) management. + */ +void +aio_init_aioinfo(struct proc *p) +{ + struct kaioinfo *ki; + + ki = uma_zalloc(kaio_zone, M_WAITOK); + mtx_init(&ki->kaio_mtx, "aiomtx", NULL, MTX_DEF); + ki->kaio_flags = 0; + ki->kaio_maxactive_count = max_aio_per_proc; + ki->kaio_active_count = 0; + ki->kaio_qallowed_count = max_aio_queue_per_proc; + ki->kaio_count = 0; + ki->kaio_ballowed_count = max_buf_aio; + ki->kaio_buffer_count = 0; + TAILQ_INIT(&ki->kaio_all); + TAILQ_INIT(&ki->kaio_done); + TAILQ_INIT(&ki->kaio_jobqueue); + TAILQ_INIT(&ki->kaio_bufqueue); + TAILQ_INIT(&ki->kaio_liojoblist); + TAILQ_INIT(&ki->kaio_sockqueue); + TAILQ_INIT(&ki->kaio_syncqueue); + TASK_INIT(&ki->kaio_task, 0, aio_kick_helper, p); + PROC_LOCK(p); + if (p->p_aioinfo == NULL) { + p->p_aioinfo = ki; + PROC_UNLOCK(p); + } else { + PROC_UNLOCK(p); + mtx_destroy(&ki->kaio_mtx); + uma_zfree(kaio_zone, ki); + } + + while (num_aio_procs < MIN(target_aio_procs, max_aio_procs)) + aio_newproc(NULL); +} + +static int +aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi) +{ + struct thread *td; + int error; + + error = sigev_findtd(p, sigev, &td); + if (error) + return (error); + if (!KSI_ONQ(ksi)) { + ksiginfo_set_sigev(ksi, sigev); + ksi->ksi_code = SI_ASYNCIO; + ksi->ksi_flags |= KSI_EXT | KSI_INS; + tdsendsignal(p, td, ksi->ksi_signo, ksi); + } + PROC_UNLOCK(p); + return (error); +} + +/* + * Free a job entry. Wait for completion if it is currently active, but don't + * delay forever. If we delay, we return a flag that says that we have to + * restart the queue scan. + */ +static int +aio_free_entry(struct aiocblist *aiocbe) +{ + struct kaioinfo *ki; + struct aioliojob *lj; + struct proc *p; + + p = aiocbe->userproc; + MPASS(curproc == p); + ki = p->p_aioinfo; + MPASS(ki != NULL); + + AIO_LOCK_ASSERT(ki, MA_OWNED); + MPASS(aiocbe->jobstate == JOBST_JOBFINISHED); + + atomic_subtract_int(&num_queue_count, 1); + + ki->kaio_count--; + MPASS(ki->kaio_count >= 0); + + TAILQ_REMOVE(&ki->kaio_done, aiocbe, plist); + TAILQ_REMOVE(&ki->kaio_all, aiocbe, allist); + + lj = aiocbe->lio; + if (lj) { + lj->lioj_count--; + lj->lioj_finished_count--; + + if (lj->lioj_count == 0) { + TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list); + /* lio is going away, we need to destroy any knotes */ + knlist_delete(&lj->klist, curthread, 1); + PROC_LOCK(p); + sigqueue_take(&lj->lioj_ksi); + PROC_UNLOCK(p); + uma_zfree(aiolio_zone, lj); + } + } + + /* aiocbe is going away, we need to destroy any knotes */ + knlist_delete(&aiocbe->klist, curthread, 1); + PROC_LOCK(p); + sigqueue_take(&aiocbe->ksi); + PROC_UNLOCK(p); + + MPASS(aiocbe->bp == NULL); + aiocbe->jobstate = JOBST_NULL; + AIO_UNLOCK(ki); + + /* + * The thread argument here is used to find the owning process + * and is also passed to fo_close() which may pass it to various + * places such as devsw close() routines. Because of that, we + * need a thread pointer from the process owning the job that is + * persistent and won't disappear out from under us or move to + * another process. + * + * Currently, all the callers of this function call it to remove + * an aiocblist from the current process' job list either via a + * syscall or due to the current process calling exit() or + * execve(). Thus, we know that p == curproc. We also know that + * curthread can't exit since we are curthread. + * + * Therefore, we use curthread as the thread to pass to + * knlist_delete(). This does mean that it is possible for the + * thread pointer at close time to differ from the thread pointer + * at open time, but this is already true of file descriptors in + * a multithreaded process. + */ + fdrop(aiocbe->fd_file, curthread); + crfree(aiocbe->cred); + uma_zfree(aiocb_zone, aiocbe); + AIO_LOCK(ki); + + return (0); +} + +static void +aio_proc_rundown_exec(void *arg, struct proc *p, struct image_params *imgp __unused) +{ + aio_proc_rundown(arg, p); +} + +/* + * Rundown the jobs for a given process. + */ +static void +aio_proc_rundown(void *arg, struct proc *p) +{ + struct kaioinfo *ki; + struct aioliojob *lj; + struct aiocblist *cbe, *cbn; + struct file *fp; + struct socket *so; + int remove; + + KASSERT(curthread->td_proc == p, + ("%s: called on non-curproc", __func__)); + ki = p->p_aioinfo; + if (ki == NULL) + return; + + AIO_LOCK(ki); + ki->kaio_flags |= KAIO_RUNDOWN; + +restart: + + /* + * Try to cancel all pending requests. This code simulates + * aio_cancel on all pending I/O requests. + */ + TAILQ_FOREACH_SAFE(cbe, &ki->kaio_jobqueue, plist, cbn) { + remove = 0; + mtx_lock(&aio_job_mtx); + if (cbe->jobstate == JOBST_JOBQGLOBAL) { + TAILQ_REMOVE(&aio_jobs, cbe, list); + remove = 1; + } else if (cbe->jobstate == JOBST_JOBQSOCK) { + fp = cbe->fd_file; + MPASS(fp->f_type == DTYPE_SOCKET); + so = fp->f_data; + TAILQ_REMOVE(&so->so_aiojobq, cbe, list); + remove = 1; + } else if (cbe->jobstate == JOBST_JOBQSYNC) { + TAILQ_REMOVE(&ki->kaio_syncqueue, cbe, list); + remove = 1; + } + mtx_unlock(&aio_job_mtx); + + if (remove) { + cbe->jobstate = JOBST_JOBFINISHED; + cbe->uaiocb._aiocb_private.status = -1; + cbe->uaiocb._aiocb_private.error = ECANCELED; + TAILQ_REMOVE(&ki->kaio_jobqueue, cbe, plist); + aio_bio_done_notify(p, cbe, DONE_QUEUE); + } + } + + /* Wait for all running I/O to be finished */ + if (TAILQ_FIRST(&ki->kaio_bufqueue) || + TAILQ_FIRST(&ki->kaio_jobqueue)) { + ki->kaio_flags |= KAIO_WAKEUP; + msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO, "aioprn", hz); + goto restart; + } + + /* Free all completed I/O requests. */ + while ((cbe = TAILQ_FIRST(&ki->kaio_done)) != NULL) + aio_free_entry(cbe); + + while ((lj = TAILQ_FIRST(&ki->kaio_liojoblist)) != NULL) { + if (lj->lioj_count == 0) { + TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list); + knlist_delete(&lj->klist, curthread, 1); + PROC_LOCK(p); + sigqueue_take(&lj->lioj_ksi); + PROC_UNLOCK(p); + uma_zfree(aiolio_zone, lj); + } else { + panic("LIO job not cleaned up: C:%d, FC:%d\n", + lj->lioj_count, lj->lioj_finished_count); + } + } + AIO_UNLOCK(ki); + taskqueue_drain(taskqueue_aiod_bio, &ki->kaio_task); + mtx_destroy(&ki->kaio_mtx); + uma_zfree(kaio_zone, ki); + p->p_aioinfo = NULL; +} + +/* + * Select a job to run (called by an AIO daemon). + */ +static struct aiocblist * +aio_selectjob(struct aiothreadlist *aiop) +{ + struct aiocblist *aiocbe; + struct kaioinfo *ki; + struct proc *userp; + + mtx_assert(&aio_job_mtx, MA_OWNED); + TAILQ_FOREACH(aiocbe, &aio_jobs, list) { + userp = aiocbe->userproc; + ki = userp->p_aioinfo; + + if (ki->kaio_active_count < ki->kaio_maxactive_count) { + TAILQ_REMOVE(&aio_jobs, aiocbe, list); + /* Account for currently active jobs. */ + ki->kaio_active_count++; + aiocbe->jobstate = JOBST_JOBRUNNING; + break; + } + } + return (aiocbe); +} + +/* + * Move all data to a permanent storage device, this code + * simulates fsync syscall. + */ +static int +aio_fsync_vnode(struct thread *td, struct vnode *vp) +{ + struct mount *mp; + int error; + + if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) + goto drop; + vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); + if (vp->v_object != NULL) { + VM_OBJECT_LOCK(vp->v_object); + vm_object_page_clean(vp->v_object, 0, 0, 0); + VM_OBJECT_UNLOCK(vp->v_object); + } + error = VOP_FSYNC(vp, MNT_WAIT, td); + + VOP_UNLOCK(vp, 0); + vn_finished_write(mp); +drop: + return (error); +} + +/* + * The AIO processing activity. This is the code that does the I/O request for + * the non-physio version of the operations. The normal vn operations are used, + * and this code should work in all instances for every type of file, including + * pipes, sockets, fifos, and regular files. + * + * XXX I don't think it works well for socket, pipe, and fifo. + */ +static void +aio_process(struct aiocblist *aiocbe) +{ + struct ucred *td_savedcred; + struct thread *td; + struct aiocb *cb; + struct file *fp; + struct socket *so; + struct uio auio; + struct iovec aiov; + int cnt; + int error; + int oublock_st, oublock_end; + int inblock_st, inblock_end; + + td = curthread; + td_savedcred = td->td_ucred; + td->td_ucred = aiocbe->cred; + cb = &aiocbe->uaiocb; + fp = aiocbe->fd_file; + + if (cb->aio_lio_opcode == LIO_SYNC) { + error = 0; + cnt = 0; + if (fp->f_vnode != NULL) + error = aio_fsync_vnode(td, fp->f_vnode); + cb->_aiocb_private.error = error; + cb->_aiocb_private.status = 0; + td->td_ucred = td_savedcred; + return; + } + + aiov.iov_base = (void *)(uintptr_t)cb->aio_buf; + aiov.iov_len = cb->aio_nbytes; + + auio.uio_iov = &aiov; + auio.uio_iovcnt = 1; + auio.uio_offset = cb->aio_offset; + auio.uio_resid = cb->aio_nbytes; + cnt = cb->aio_nbytes; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_td = td; + + inblock_st = td->td_ru.ru_inblock; + oublock_st = td->td_ru.ru_oublock; + /* + * aio_aqueue() acquires a reference to the file that is + * released in aio_free_entry(). + */ + if (cb->aio_lio_opcode == LIO_READ) { + auio.uio_rw = UIO_READ; + if (auio.uio_resid == 0) + error = 0; + else + error = fo_read(fp, &auio, fp->f_cred, FOF_OFFSET, td); + } else { + if (fp->f_type == DTYPE_VNODE) + bwillwrite(); + auio.uio_rw = UIO_WRITE; + error = fo_write(fp, &auio, fp->f_cred, FOF_OFFSET, td); + } + inblock_end = td->td_ru.ru_inblock; + oublock_end = td->td_ru.ru_oublock; + + aiocbe->inputcharge = inblock_end - inblock_st; + aiocbe->outputcharge = oublock_end - oublock_st; + + if ((error) && (auio.uio_resid != cnt)) { + if (error == ERESTART || error == EINTR || error == EWOULDBLOCK) + error = 0; + if ((error == EPIPE) && (cb->aio_lio_opcode == LIO_WRITE)) { + int sigpipe = 1; + if (fp->f_type == DTYPE_SOCKET) { + so = fp->f_data; + if (so->so_options & SO_NOSIGPIPE) + sigpipe = 0; + } + if (sigpipe) { + PROC_LOCK(aiocbe->userproc); + kern_psignal(aiocbe->userproc, SIGPIPE); + PROC_UNLOCK(aiocbe->userproc); + } + } + } + + cnt -= auio.uio_resid; + cb->_aiocb_private.error = error; + cb->_aiocb_private.status = cnt; + td->td_ucred = td_savedcred; +} + +static void +aio_bio_done_notify(struct proc *userp, struct aiocblist *aiocbe, int type) +{ + struct aioliojob *lj; + struct kaioinfo *ki; + struct aiocblist *scb, *scbn; + int lj_done; + + ki = userp->p_aioinfo; + AIO_LOCK_ASSERT(ki, MA_OWNED); + lj = aiocbe->lio; + lj_done = 0; + if (lj) { + lj->lioj_finished_count++; + if (lj->lioj_count == lj->lioj_finished_count) + lj_done = 1; + } + if (type == DONE_QUEUE) { + aiocbe->jobflags |= AIOCBLIST_DONE; + } else { + aiocbe->jobflags |= AIOCBLIST_BUFDONE; + } + TAILQ_INSERT_TAIL(&ki->kaio_done, aiocbe, plist); + aiocbe->jobstate = JOBST_JOBFINISHED; + + if (ki->kaio_flags & KAIO_RUNDOWN) + goto notification_done; + + if (aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL || + aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID) + aio_sendsig(userp, &aiocbe->uaiocb.aio_sigevent, &aiocbe->ksi); + + KNOTE_LOCKED(&aiocbe->klist, 1); + + if (lj_done) { + if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) { + lj->lioj_flags |= LIOJ_KEVENT_POSTED; + KNOTE_LOCKED(&lj->klist, 1); + } + if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED)) + == LIOJ_SIGNAL + && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL || + lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) { + aio_sendsig(userp, &lj->lioj_signal, &lj->lioj_ksi); + lj->lioj_flags |= LIOJ_SIGNAL_POSTED; + } + } + +notification_done: + if (aiocbe->jobflags & AIOCBLIST_CHECKSYNC) { + TAILQ_FOREACH_SAFE(scb, &ki->kaio_syncqueue, list, scbn) { + if (aiocbe->fd_file == scb->fd_file && + aiocbe->seqno < scb->seqno) { + if (--scb->pending == 0) { + mtx_lock(&aio_job_mtx); + scb->jobstate = JOBST_JOBQGLOBAL; + TAILQ_REMOVE(&ki->kaio_syncqueue, scb, list); + TAILQ_INSERT_TAIL(&aio_jobs, scb, list); + aio_kick_nowait(userp); + mtx_unlock(&aio_job_mtx); + } + } + } + } + if (ki->kaio_flags & KAIO_WAKEUP) { + ki->kaio_flags &= ~KAIO_WAKEUP; + wakeup(&userp->p_aioinfo); + } +} + +/* + * The AIO daemon, most of the actual work is done in aio_process, + * but the setup (and address space mgmt) is done in this routine. + */ +static void +aio_daemon(void *_id) +{ + struct aiocblist *aiocbe; + struct aiothreadlist *aiop; + struct kaioinfo *ki; + struct proc *curcp, *mycp, *userp; + struct vmspace *myvm, *tmpvm; + struct thread *td = curthread; + int id = (intptr_t)_id; + + /* + * Local copies of curproc (cp) and vmspace (myvm) + */ + mycp = td->td_proc; + myvm = mycp->p_vmspace; + + KASSERT(mycp->p_textvp == NULL, ("kthread has a textvp")); + + /* + * Allocate and ready the aio control info. There is one aiop structure + * per daemon. + */ + aiop = uma_zalloc(aiop_zone, M_WAITOK); + aiop->aiothread = td; + aiop->aiothreadflags = 0; + + /* The daemon resides in its own pgrp. */ + sys_setsid(td, NULL); + + /* + * Wakeup parent process. (Parent sleeps to keep from blasting away + * and creating too many daemons.) + */ + sema_post(&aio_newproc_sem); + + mtx_lock(&aio_job_mtx); + for (;;) { + /* + * curcp is the current daemon process context. + * userp is the current user process context. + */ + curcp = mycp; + + /* + * Take daemon off of free queue + */ + if (aiop->aiothreadflags & AIOP_FREE) { + TAILQ_REMOVE(&aio_freeproc, aiop, list); + aiop->aiothreadflags &= ~AIOP_FREE; + } + + /* + * Check for jobs. + */ + while ((aiocbe = aio_selectjob(aiop)) != NULL) { + mtx_unlock(&aio_job_mtx); + userp = aiocbe->userproc; + + /* + * Connect to process address space for user program. + */ + if (userp != curcp) { + /* + * Save the current address space that we are + * connected to. + */ + tmpvm = mycp->p_vmspace; + + /* + * Point to the new user address space, and + * refer to it. + */ + mycp->p_vmspace = userp->p_vmspace; + atomic_add_int(&mycp->p_vmspace->vm_refcnt, 1); + + /* Activate the new mapping. */ + pmap_activate(FIRST_THREAD_IN_PROC(mycp)); + + /* + * If the old address space wasn't the daemons + * own address space, then we need to remove the + * daemon's reference from the other process + * that it was acting on behalf of. + */ + if (tmpvm != myvm) { + vmspace_free(tmpvm); + } + curcp = userp; + } + + ki = userp->p_aioinfo; + + /* Do the I/O function. */ + aio_process(aiocbe); + + mtx_lock(&aio_job_mtx); + /* Decrement the active job count. */ + ki->kaio_active_count--; + mtx_unlock(&aio_job_mtx); + + AIO_LOCK(ki); + TAILQ_REMOVE(&ki->kaio_jobqueue, aiocbe, plist); + aio_bio_done_notify(userp, aiocbe, DONE_QUEUE); + AIO_UNLOCK(ki); + + mtx_lock(&aio_job_mtx); + } + + /* + * Disconnect from user address space. + */ + if (curcp != mycp) { + + mtx_unlock(&aio_job_mtx); + + /* Get the user address space to disconnect from. */ + tmpvm = mycp->p_vmspace; + + /* Get original address space for daemon. */ + mycp->p_vmspace = myvm; + + /* Activate the daemon's address space. */ + pmap_activate(FIRST_THREAD_IN_PROC(mycp)); +#ifdef DIAGNOSTIC + if (tmpvm == myvm) { + printf("AIOD: vmspace problem -- %d\n", + mycp->p_pid); + } +#endif + /* Remove our vmspace reference. */ + vmspace_free(tmpvm); + + curcp = mycp; + + mtx_lock(&aio_job_mtx); + /* + * We have to restart to avoid race, we only sleep if + * no job can be selected, that should be + * curcp == mycp. + */ + continue; + } + + mtx_assert(&aio_job_mtx, MA_OWNED); + + TAILQ_INSERT_HEAD(&aio_freeproc, aiop, list); + aiop->aiothreadflags |= AIOP_FREE; + + /* + * If daemon is inactive for a long time, allow it to exit, + * thereby freeing resources. + */ + if (msleep(aiop->aiothread, &aio_job_mtx, PRIBIO, "aiordy", + aiod_lifetime)) { + if (TAILQ_EMPTY(&aio_jobs)) { + if ((aiop->aiothreadflags & AIOP_FREE) && + (num_aio_procs > target_aio_procs)) { + TAILQ_REMOVE(&aio_freeproc, aiop, list); + num_aio_procs--; + mtx_unlock(&aio_job_mtx); + uma_zfree(aiop_zone, aiop); + free_unr(aiod_unr, id); +#ifdef DIAGNOSTIC + if (mycp->p_vmspace->vm_refcnt <= 1) { + printf("AIOD: bad vm refcnt for" + " exiting daemon: %d\n", + mycp->p_vmspace->vm_refcnt); + } +#endif + kproc_exit(0); + } + } + } + } + mtx_unlock(&aio_job_mtx); + panic("shouldn't be here\n"); +} + +/* + * Create a new AIO daemon. This is mostly a kernel-thread fork routine. The + * AIO daemon modifies its environment itself. + */ +static int +aio_newproc(int *start) +{ + int error; + struct proc *p; + int id; + + id = alloc_unr(aiod_unr); + error = kproc_create(aio_daemon, (void *)(intptr_t)id, &p, + RFNOWAIT, 0, "aiod%d", id); + if (error == 0) { + /* + * Wait until daemon is started. + */ + sema_wait(&aio_newproc_sem); + mtx_lock(&aio_job_mtx); + num_aio_procs++; + if (start != NULL) + (*start)--; + mtx_unlock(&aio_job_mtx); + } else { + free_unr(aiod_unr, id); + } + return (error); +} + +/* + * Try the high-performance, low-overhead physio method for eligible + * VCHR devices. This method doesn't use an aio helper thread, and + * thus has very low overhead. + * + * Assumes that the caller, aio_aqueue(), has incremented the file + * structure's reference count, preventing its deallocation for the + * duration of this call. + */ +static int +aio_qphysio(struct proc *p, struct aiocblist *aiocbe) +{ + struct aiocb *cb; + struct file *fp; + struct buf *bp; + struct vnode *vp; + struct kaioinfo *ki; + struct aioliojob *lj; + int error; + + cb = &aiocbe->uaiocb; + fp = aiocbe->fd_file; + + if (fp->f_type != DTYPE_VNODE) + return (-1); + + vp = fp->f_vnode; + + /* + * If its not a disk, we don't want to return a positive error. + * It causes the aio code to not fall through to try the thread + * way when you're talking to a regular file. + */ + if (!vn_isdisk(vp, &error)) { + if (error == ENOTBLK) + return (-1); + else + return (error); + } + + if (vp->v_bufobj.bo_bsize == 0) + return (-1); + + if (cb->aio_nbytes % vp->v_bufobj.bo_bsize) + return (-1); + + if (cb->aio_nbytes > vp->v_rdev->si_iosize_max) + return (-1); + + if (cb->aio_nbytes > + MAXPHYS - (((vm_offset_t) cb->aio_buf) & PAGE_MASK)) + return (-1); + + ki = p->p_aioinfo; + if (ki->kaio_buffer_count >= ki->kaio_ballowed_count) + return (-1); + + /* Create and build a buffer header for a transfer. */ + bp = (struct buf *)getpbuf(NULL); + BUF_KERNPROC(bp); + + AIO_LOCK(ki); + ki->kaio_count++; + ki->kaio_buffer_count++; + lj = aiocbe->lio; + if (lj) + lj->lioj_count++; + AIO_UNLOCK(ki); + + /* + * Get a copy of the kva from the physical buffer. + */ + error = 0; + + bp->b_bcount = cb->aio_nbytes; + bp->b_bufsize = cb->aio_nbytes; + bp->b_iodone = aio_physwakeup; + bp->b_saveaddr = bp->b_data; + bp->b_data = (void *)(uintptr_t)cb->aio_buf; + bp->b_offset = cb->aio_offset; + bp->b_iooffset = cb->aio_offset; + bp->b_blkno = btodb(cb->aio_offset); + bp->b_iocmd = cb->aio_lio_opcode == LIO_WRITE ? BIO_WRITE : BIO_READ; + + /* + * Bring buffer into kernel space. + */ + if (vmapbuf(bp) < 0) { + error = EFAULT; + goto doerror; + } + + AIO_LOCK(ki); + aiocbe->bp = bp; + bp->b_caller1 = (void *)aiocbe; + TAILQ_INSERT_TAIL(&ki->kaio_bufqueue, aiocbe, plist); + TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist); + aiocbe->jobstate = JOBST_JOBQBUF; + cb->_aiocb_private.status = cb->aio_nbytes; + AIO_UNLOCK(ki); + + atomic_add_int(&num_queue_count, 1); + atomic_add_int(&num_buf_aio, 1); + + bp->b_error = 0; + + TASK_INIT(&aiocbe->biotask, 0, biohelper, aiocbe); + + /* Perform transfer. */ + dev_strategy(vp->v_rdev, bp); + return (0); + +doerror: + AIO_LOCK(ki); + ki->kaio_count--; + ki->kaio_buffer_count--; + if (lj) + lj->lioj_count--; + aiocbe->bp = NULL; + AIO_UNLOCK(ki); + relpbuf(bp, NULL); + return (error); +} + +/* + * Wake up aio requests that may be serviceable now. + */ +static void +aio_swake_cb(struct socket *so, struct sockbuf *sb) +{ + struct aiocblist *cb, *cbn; + int opcode; + + SOCKBUF_LOCK_ASSERT(sb); + if (sb == &so->so_snd) + opcode = LIO_WRITE; + else + opcode = LIO_READ; + + sb->sb_flags &= ~SB_AIO; + mtx_lock(&aio_job_mtx); + TAILQ_FOREACH_SAFE(cb, &so->so_aiojobq, list, cbn) { + if (opcode == cb->uaiocb.aio_lio_opcode) { + if (cb->jobstate != JOBST_JOBQSOCK) + panic("invalid queue value"); + /* XXX + * We don't have actual sockets backend yet, + * so we simply move the requests to the generic + * file I/O backend. + */ + TAILQ_REMOVE(&so->so_aiojobq, cb, list); + TAILQ_INSERT_TAIL(&aio_jobs, cb, list); + aio_kick_nowait(cb->userproc); + } + } + mtx_unlock(&aio_job_mtx); +} + +static int +convert_old_sigevent(struct osigevent *osig, struct sigevent *nsig) +{ + + /* + * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are + * supported by AIO with the old sigevent structure. + */ + nsig->sigev_notify = osig->sigev_notify; + switch (nsig->sigev_notify) { + case SIGEV_NONE: + break; + case SIGEV_SIGNAL: + nsig->sigev_signo = osig->__sigev_u.__sigev_signo; + break; + case SIGEV_KEVENT: + nsig->sigev_notify_kqueue = + osig->__sigev_u.__sigev_notify_kqueue; + nsig->sigev_value.sival_ptr = osig->sigev_value.sival_ptr; + break; + default: + return (EINVAL); + } + return (0); +} + +static int +aiocb_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob) +{ + struct oaiocb *ojob; + int error; + + bzero(kjob, sizeof(struct aiocb)); + error = copyin(ujob, kjob, sizeof(struct oaiocb)); + if (error) + return (error); + ojob = (struct oaiocb *)kjob; + return (convert_old_sigevent(&ojob->aio_sigevent, &kjob->aio_sigevent)); +} + +static int +aiocb_copyin(struct aiocb *ujob, struct aiocb *kjob) +{ + + return (copyin(ujob, kjob, sizeof(struct aiocb))); +} + +static long +aiocb_fetch_status(struct aiocb *ujob) +{ + + return (fuword(&ujob->_aiocb_private.status)); +} + +static long +aiocb_fetch_error(struct aiocb *ujob) +{ + + return (fuword(&ujob->_aiocb_private.error)); +} + +static int +aiocb_store_status(struct aiocb *ujob, long status) +{ + + return (suword(&ujob->_aiocb_private.status, status)); +} + +static int +aiocb_store_error(struct aiocb *ujob, long error) +{ + + return (suword(&ujob->_aiocb_private.error, error)); +} + +static int +aiocb_store_kernelinfo(struct aiocb *ujob, long jobref) +{ + + return (suword(&ujob->_aiocb_private.kernelinfo, jobref)); +} + +static int +aiocb_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob) +{ + + return (suword(ujobp, (long)ujob)); +} + +static struct aiocb_ops aiocb_ops = { + .copyin = aiocb_copyin, + .fetch_status = aiocb_fetch_status, + .fetch_error = aiocb_fetch_error, + .store_status = aiocb_store_status, + .store_error = aiocb_store_error, + .store_kernelinfo = aiocb_store_kernelinfo, + .store_aiocb = aiocb_store_aiocb, +}; + +static struct aiocb_ops aiocb_ops_osigevent = { + .copyin = aiocb_copyin_old_sigevent, + .fetch_status = aiocb_fetch_status, + .fetch_error = aiocb_fetch_error, + .store_status = aiocb_store_status, + .store_error = aiocb_store_error, + .store_kernelinfo = aiocb_store_kernelinfo, + .store_aiocb = aiocb_store_aiocb, +}; + +/* + * Queue a new AIO request. Choosing either the threaded or direct physio VCHR + * technique is done in this code. + */ +int +aio_aqueue(struct thread *td, struct aiocb *job, struct aioliojob *lj, + int type, struct aiocb_ops *ops) +{ + struct proc *p = td->td_proc; + struct file *fp; + struct socket *so; + struct aiocblist *aiocbe, *cb; + struct kaioinfo *ki; + struct kevent kev; + struct sockbuf *sb; + int opcode; + int error; + int fd, kqfd; + int jid; + u_short evflags; + + if (p->p_aioinfo == NULL) + aio_init_aioinfo(p); + + ki = p->p_aioinfo; + + ops->store_status(job, -1); + ops->store_error(job, 0); + ops->store_kernelinfo(job, -1); + + if (num_queue_count >= max_queue_count || + ki->kaio_count >= ki->kaio_qallowed_count) { + ops->store_error(job, EAGAIN); + return (EAGAIN); + } + + aiocbe = uma_zalloc(aiocb_zone, M_WAITOK | M_ZERO); + aiocbe->inputcharge = 0; + aiocbe->outputcharge = 0; + knlist_init_mtx(&aiocbe->klist, AIO_MTX(ki)); + + error = ops->copyin(job, &aiocbe->uaiocb); + if (error) { + ops->store_error(job, error); + uma_zfree(aiocb_zone, aiocbe); + return (error); + } + + /* XXX: aio_nbytes is later casted to signed types. */ + if (aiocbe->uaiocb.aio_nbytes > INT_MAX) { + uma_zfree(aiocb_zone, aiocbe); + return (EINVAL); + } + + if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT && + aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_SIGNAL && + aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_THREAD_ID && + aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_NONE) { + ops->store_error(job, EINVAL); + uma_zfree(aiocb_zone, aiocbe); + return (EINVAL); + } + + if ((aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL || + aiocbe->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID) && + !_SIG_VALID(aiocbe->uaiocb.aio_sigevent.sigev_signo)) { + uma_zfree(aiocb_zone, aiocbe); + return (EINVAL); + } + + ksiginfo_init(&aiocbe->ksi); + + /* Save userspace address of the job info. */ + aiocbe->uuaiocb = job; + + /* Get the opcode. */ + if (type != LIO_NOP) + aiocbe->uaiocb.aio_lio_opcode = type; + opcode = aiocbe->uaiocb.aio_lio_opcode; + + /* + * Validate the opcode and fetch the file object for the specified + * file descriptor. + * + * XXXRW: Moved the opcode validation up here so that we don't + * retrieve a file descriptor without knowing what the capabiltity + * should be. + */ + fd = aiocbe->uaiocb.aio_fildes; + switch (opcode) { + case LIO_WRITE: + error = fget_write(td, fd, CAP_WRITE | CAP_SEEK, &fp); + break; + case LIO_READ: + error = fget_read(td, fd, CAP_READ | CAP_SEEK, &fp); + break; + case LIO_SYNC: + error = fget(td, fd, CAP_FSYNC, &fp); + break; + case LIO_NOP: + error = fget(td, fd, 0, &fp); + break; + default: + error = EINVAL; + } + if (error) { + uma_zfree(aiocb_zone, aiocbe); + ops->store_error(job, error); + return (error); + } + + if (opcode == LIO_SYNC && fp->f_vnode == NULL) { + error = EINVAL; + goto aqueue_fail; + } + + if (opcode != LIO_SYNC && aiocbe->uaiocb.aio_offset == -1LL) { + error = EINVAL; + goto aqueue_fail; + } + + aiocbe->fd_file = fp; + + mtx_lock(&aio_job_mtx); + jid = jobrefid++; + aiocbe->seqno = jobseqno++; + mtx_unlock(&aio_job_mtx); + error = ops->store_kernelinfo(job, jid); + if (error) { + error = EINVAL; + goto aqueue_fail; + } + aiocbe->uaiocb._aiocb_private.kernelinfo = (void *)(intptr_t)jid; + + if (opcode == LIO_NOP) { + fdrop(fp, td); + uma_zfree(aiocb_zone, aiocbe); + return (0); + } + + if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT) + goto no_kqueue; + evflags = aiocbe->uaiocb.aio_sigevent.sigev_notify_kevent_flags; + if ((evflags & ~(EV_CLEAR | EV_DISPATCH | EV_ONESHOT)) != 0) { + error = EINVAL; + goto aqueue_fail; + } + kqfd = aiocbe->uaiocb.aio_sigevent.sigev_notify_kqueue; + kev.ident = (uintptr_t)aiocbe->uuaiocb; + kev.filter = EVFILT_AIO; + kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1 | evflags; + kev.data = (intptr_t)aiocbe; + kev.udata = aiocbe->uaiocb.aio_sigevent.sigev_value.sival_ptr; + error = kqfd_register(kqfd, &kev, td, 1); +aqueue_fail: + if (error) { + fdrop(fp, td); + uma_zfree(aiocb_zone, aiocbe); + ops->store_error(job, error); + goto done; + } +no_kqueue: + + ops->store_error(job, EINPROGRESS); + aiocbe->uaiocb._aiocb_private.error = EINPROGRESS; + aiocbe->userproc = p; + aiocbe->cred = crhold(td->td_ucred); + aiocbe->jobflags = 0; + aiocbe->lio = lj; + + if (opcode == LIO_SYNC) + goto queueit; + + if (fp->f_type == DTYPE_SOCKET) { + /* + * Alternate queueing for socket ops: Reach down into the + * descriptor to get the socket data. Then check to see if the + * socket is ready to be read or written (based on the requested + * operation). + * + * If it is not ready for io, then queue the aiocbe on the + * socket, and set the flags so we get a call when sbnotify() + * happens. + * + * Note if opcode is neither LIO_WRITE nor LIO_READ we lock + * and unlock the snd sockbuf for no reason. + */ + so = fp->f_data; + sb = (opcode == LIO_READ) ? &so->so_rcv : &so->so_snd; + SOCKBUF_LOCK(sb); + if (((opcode == LIO_READ) && (!soreadable(so))) || ((opcode == + LIO_WRITE) && (!sowriteable(so)))) { + sb->sb_flags |= SB_AIO; + + mtx_lock(&aio_job_mtx); + TAILQ_INSERT_TAIL(&so->so_aiojobq, aiocbe, list); + mtx_unlock(&aio_job_mtx); + + AIO_LOCK(ki); + TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist); + TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist); + aiocbe->jobstate = JOBST_JOBQSOCK; + ki->kaio_count++; + if (lj) + lj->lioj_count++; + AIO_UNLOCK(ki); + SOCKBUF_UNLOCK(sb); + atomic_add_int(&num_queue_count, 1); + error = 0; + goto done; + } + SOCKBUF_UNLOCK(sb); + } + + if ((error = aio_qphysio(p, aiocbe)) == 0) + goto done; +#if 0 + if (error > 0) { + aiocbe->uaiocb._aiocb_private.error = error; + ops->store_error(job, error); + goto done; + } +#endif +queueit: + /* No buffer for daemon I/O. */ + aiocbe->bp = NULL; + atomic_add_int(&num_queue_count, 1); + + AIO_LOCK(ki); + ki->kaio_count++; + if (lj) + lj->lioj_count++; + TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist); + TAILQ_INSERT_TAIL(&ki->kaio_all, aiocbe, allist); + if (opcode == LIO_SYNC) { + TAILQ_FOREACH(cb, &ki->kaio_jobqueue, plist) { + if (cb->fd_file == aiocbe->fd_file && + cb->uaiocb.aio_lio_opcode != LIO_SYNC && + cb->seqno < aiocbe->seqno) { + cb->jobflags |= AIOCBLIST_CHECKSYNC; + aiocbe->pending++; + } + } + TAILQ_FOREACH(cb, &ki->kaio_bufqueue, plist) { + if (cb->fd_file == aiocbe->fd_file && + cb->uaiocb.aio_lio_opcode != LIO_SYNC && + cb->seqno < aiocbe->seqno) { + cb->jobflags |= AIOCBLIST_CHECKSYNC; + aiocbe->pending++; + } + } + if (aiocbe->pending != 0) { + TAILQ_INSERT_TAIL(&ki->kaio_syncqueue, aiocbe, list); + aiocbe->jobstate = JOBST_JOBQSYNC; + AIO_UNLOCK(ki); + goto done; + } + } + mtx_lock(&aio_job_mtx); + TAILQ_INSERT_TAIL(&aio_jobs, aiocbe, list); + aiocbe->jobstate = JOBST_JOBQGLOBAL; + aio_kick_nowait(p); + mtx_unlock(&aio_job_mtx); + AIO_UNLOCK(ki); + error = 0; +done: + return (error); +} + +static void +aio_kick_nowait(struct proc *userp) +{ + struct kaioinfo *ki = userp->p_aioinfo; + struct aiothreadlist *aiop; + + mtx_assert(&aio_job_mtx, MA_OWNED); + if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) { + TAILQ_REMOVE(&aio_freeproc, aiop, list); + aiop->aiothreadflags &= ~AIOP_FREE; + wakeup(aiop->aiothread); + } else if (((num_aio_resv_start + num_aio_procs) < max_aio_procs) && + ((ki->kaio_active_count + num_aio_resv_start) < + ki->kaio_maxactive_count)) { + taskqueue_enqueue(taskqueue_aiod_bio, &ki->kaio_task); + } +} + +static int +aio_kick(struct proc *userp) +{ + struct kaioinfo *ki = userp->p_aioinfo; + struct aiothreadlist *aiop; + int error, ret = 0; + + mtx_assert(&aio_job_mtx, MA_OWNED); +retryproc: + if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) { + TAILQ_REMOVE(&aio_freeproc, aiop, list); + aiop->aiothreadflags &= ~AIOP_FREE; + wakeup(aiop->aiothread); + } else if (((num_aio_resv_start + num_aio_procs) < max_aio_procs) && + ((ki->kaio_active_count + num_aio_resv_start) < + ki->kaio_maxactive_count)) { + num_aio_resv_start++; + mtx_unlock(&aio_job_mtx); + error = aio_newproc(&num_aio_resv_start); + mtx_lock(&aio_job_mtx); + if (error) { + num_aio_resv_start--; + goto retryproc; + } + } else { + ret = -1; + } + return (ret); +} + +static void +aio_kick_helper(void *context, int pending) +{ + struct proc *userp = context; + + mtx_lock(&aio_job_mtx); + while (--pending >= 0) { + if (aio_kick(userp)) + break; + } + mtx_unlock(&aio_job_mtx); +} + +/* + * Support the aio_return system call, as a side-effect, kernel resources are + * released. + */ +static int +kern_aio_return(struct thread *td, struct aiocb *uaiocb, struct aiocb_ops *ops) +{ + struct proc *p = td->td_proc; + struct aiocblist *cb; + struct kaioinfo *ki; + int status, error; + + ki = p->p_aioinfo; + if (ki == NULL) + return (EINVAL); + AIO_LOCK(ki); + TAILQ_FOREACH(cb, &ki->kaio_done, plist) { + if (cb->uuaiocb == uaiocb) + break; + } + if (cb != NULL) { + MPASS(cb->jobstate == JOBST_JOBFINISHED); + status = cb->uaiocb._aiocb_private.status; + error = cb->uaiocb._aiocb_private.error; + td->td_retval[0] = status; + if (cb->uaiocb.aio_lio_opcode == LIO_WRITE) { + td->td_ru.ru_oublock += cb->outputcharge; + cb->outputcharge = 0; + } else if (cb->uaiocb.aio_lio_opcode == LIO_READ) { + td->td_ru.ru_inblock += cb->inputcharge; + cb->inputcharge = 0; + } + aio_free_entry(cb); + AIO_UNLOCK(ki); + ops->store_error(uaiocb, error); + ops->store_status(uaiocb, status); + } else { + error = EINVAL; + AIO_UNLOCK(ki); + } + return (error); +} + +int +sys_aio_return(struct thread *td, struct aio_return_args *uap) +{ + + return (kern_aio_return(td, uap->aiocbp, &aiocb_ops)); +} + +/* + * Allow a process to wakeup when any of the I/O requests are completed. + */ +static int +kern_aio_suspend(struct thread *td, int njoblist, struct aiocb **ujoblist, + struct timespec *ts) +{ + struct proc *p = td->td_proc; + struct timeval atv; + struct kaioinfo *ki; + struct aiocblist *cb, *cbfirst; + int error, i, timo; + + timo = 0; + if (ts) { + if (ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000) + return (EINVAL); + + TIMESPEC_TO_TIMEVAL(&atv, ts); + if (itimerfix(&atv)) + return (EINVAL); + timo = tvtohz(&atv); + } + + ki = p->p_aioinfo; + if (ki == NULL) + return (EAGAIN); + + if (njoblist == 0) + return (0); + + AIO_LOCK(ki); + for (;;) { + cbfirst = NULL; + error = 0; + TAILQ_FOREACH(cb, &ki->kaio_all, allist) { + for (i = 0; i < njoblist; i++) { + if (cb->uuaiocb == ujoblist[i]) { + if (cbfirst == NULL) + cbfirst = cb; + if (cb->jobstate == JOBST_JOBFINISHED) + goto RETURN; + } + } + } + /* All tasks were finished. */ + if (cbfirst == NULL) + break; + + ki->kaio_flags |= KAIO_WAKEUP; + error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH, + "aiospn", timo); + if (error == ERESTART) + error = EINTR; + if (error) + break; + } +RETURN: + AIO_UNLOCK(ki); + return (error); +} + +int +sys_aio_suspend(struct thread *td, struct aio_suspend_args *uap) +{ + struct timespec ts, *tsp; + struct aiocb **ujoblist; + int error; + + if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (uap->timeout) { + /* Get timespec struct. */ + if ((error = copyin(uap->timeout, &ts, sizeof(ts))) != 0) + return (error); + tsp = &ts; + } else + tsp = NULL; + + ujoblist = uma_zalloc(aiol_zone, M_WAITOK); + error = copyin(uap->aiocbp, ujoblist, uap->nent * sizeof(ujoblist[0])); + if (error == 0) + error = kern_aio_suspend(td, uap->nent, ujoblist, tsp); + uma_zfree(aiol_zone, ujoblist); + return (error); +} + +/* + * aio_cancel cancels any non-physio aio operations not currently in + * progress. + */ +int +sys_aio_cancel(struct thread *td, struct aio_cancel_args *uap) +{ + struct proc *p = td->td_proc; + struct kaioinfo *ki; + struct aiocblist *cbe, *cbn; + struct file *fp; + struct socket *so; + int error; + int remove; + int cancelled = 0; + int notcancelled = 0; + struct vnode *vp; + + /* Lookup file object. */ + error = fget(td, uap->fd, 0, &fp); + if (error) + return (error); + + ki = p->p_aioinfo; + if (ki == NULL) + goto done; + + if (fp->f_type == DTYPE_VNODE) { + vp = fp->f_vnode; + if (vn_isdisk(vp, &error)) { + fdrop(fp, td); + td->td_retval[0] = AIO_NOTCANCELED; + return (0); + } + } + + AIO_LOCK(ki); + TAILQ_FOREACH_SAFE(cbe, &ki->kaio_jobqueue, plist, cbn) { + if ((uap->fd == cbe->uaiocb.aio_fildes) && + ((uap->aiocbp == NULL) || + (uap->aiocbp == cbe->uuaiocb))) { + remove = 0; + + mtx_lock(&aio_job_mtx); + if (cbe->jobstate == JOBST_JOBQGLOBAL) { + TAILQ_REMOVE(&aio_jobs, cbe, list); + remove = 1; + } else if (cbe->jobstate == JOBST_JOBQSOCK) { + MPASS(fp->f_type == DTYPE_SOCKET); + so = fp->f_data; + TAILQ_REMOVE(&so->so_aiojobq, cbe, list); + remove = 1; + } else if (cbe->jobstate == JOBST_JOBQSYNC) { + TAILQ_REMOVE(&ki->kaio_syncqueue, cbe, list); + remove = 1; + } + mtx_unlock(&aio_job_mtx); + + if (remove) { + TAILQ_REMOVE(&ki->kaio_jobqueue, cbe, plist); + cbe->uaiocb._aiocb_private.status = -1; + cbe->uaiocb._aiocb_private.error = ECANCELED; + aio_bio_done_notify(p, cbe, DONE_QUEUE); + cancelled++; + } else { + notcancelled++; + } + if (uap->aiocbp != NULL) + break; + } + } + AIO_UNLOCK(ki); + +done: + fdrop(fp, td); + + if (uap->aiocbp != NULL) { + if (cancelled) { + td->td_retval[0] = AIO_CANCELED; + return (0); + } + } + + if (notcancelled) { + td->td_retval[0] = AIO_NOTCANCELED; + return (0); + } + + if (cancelled) { + td->td_retval[0] = AIO_CANCELED; + return (0); + } + + td->td_retval[0] = AIO_ALLDONE; + + return (0); +} + +/* + * aio_error is implemented in the kernel level for compatibility purposes + * only. For a user mode async implementation, it would be best to do it in + * a userland subroutine. + */ +static int +kern_aio_error(struct thread *td, struct aiocb *aiocbp, struct aiocb_ops *ops) +{ + struct proc *p = td->td_proc; + struct aiocblist *cb; + struct kaioinfo *ki; + int status; + + ki = p->p_aioinfo; + if (ki == NULL) { + td->td_retval[0] = EINVAL; + return (0); + } + + AIO_LOCK(ki); + TAILQ_FOREACH(cb, &ki->kaio_all, allist) { + if (cb->uuaiocb == aiocbp) { + if (cb->jobstate == JOBST_JOBFINISHED) + td->td_retval[0] = + cb->uaiocb._aiocb_private.error; + else + td->td_retval[0] = EINPROGRESS; + AIO_UNLOCK(ki); + return (0); + } + } + AIO_UNLOCK(ki); + + /* + * Hack for failure of aio_aqueue. + */ + status = ops->fetch_status(aiocbp); + if (status == -1) { + td->td_retval[0] = ops->fetch_error(aiocbp); + return (0); + } + + td->td_retval[0] = EINVAL; + return (0); +} + +int +sys_aio_error(struct thread *td, struct aio_error_args *uap) +{ + + return (kern_aio_error(td, uap->aiocbp, &aiocb_ops)); +} + +/* syscall - asynchronous read from a file (REALTIME) */ +int +sys_oaio_read(struct thread *td, struct oaio_read_args *uap) +{ + + return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ, + &aiocb_ops_osigevent)); +} + +int +sys_aio_read(struct thread *td, struct aio_read_args *uap) +{ + + return (aio_aqueue(td, uap->aiocbp, NULL, LIO_READ, &aiocb_ops)); +} + +/* syscall - asynchronous write to a file (REALTIME) */ +int +sys_oaio_write(struct thread *td, struct oaio_write_args *uap) +{ + + return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE, + &aiocb_ops_osigevent)); +} + +int +sys_aio_write(struct thread *td, struct aio_write_args *uap) +{ + + return (aio_aqueue(td, uap->aiocbp, NULL, LIO_WRITE, &aiocb_ops)); +} + +static int +kern_lio_listio(struct thread *td, int mode, struct aiocb * const *uacb_list, + struct aiocb **acb_list, int nent, struct sigevent *sig, + struct aiocb_ops *ops) +{ + struct proc *p = td->td_proc; + struct aiocb *iocb; + struct kaioinfo *ki; + struct aioliojob *lj; + struct kevent kev; + int error; + int nerror; + int i; + + if ((mode != LIO_NOWAIT) && (mode != LIO_WAIT)) + return (EINVAL); + + if (nent < 0 || nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (p->p_aioinfo == NULL) + aio_init_aioinfo(p); + + ki = p->p_aioinfo; + + lj = uma_zalloc(aiolio_zone, M_WAITOK); + lj->lioj_flags = 0; + lj->lioj_count = 0; + lj->lioj_finished_count = 0; + knlist_init_mtx(&lj->klist, AIO_MTX(ki)); + ksiginfo_init(&lj->lioj_ksi); + + /* + * Setup signal. + */ + if (sig && (mode == LIO_NOWAIT)) { + bcopy(sig, &lj->lioj_signal, sizeof(lj->lioj_signal)); + if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) { + /* Assume only new style KEVENT */ + kev.filter = EVFILT_LIO; + kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1; + kev.ident = (uintptr_t)uacb_list; /* something unique */ + kev.data = (intptr_t)lj; + /* pass user defined sigval data */ + kev.udata = lj->lioj_signal.sigev_value.sival_ptr; + error = kqfd_register( + lj->lioj_signal.sigev_notify_kqueue, &kev, td, 1); + if (error) { + uma_zfree(aiolio_zone, lj); + return (error); + } + } else if (lj->lioj_signal.sigev_notify == SIGEV_NONE) { + ; + } else if (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL || + lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID) { + if (!_SIG_VALID(lj->lioj_signal.sigev_signo)) { + uma_zfree(aiolio_zone, lj); + return EINVAL; + } + lj->lioj_flags |= LIOJ_SIGNAL; + } else { + uma_zfree(aiolio_zone, lj); + return EINVAL; + } + } + + AIO_LOCK(ki); + TAILQ_INSERT_TAIL(&ki->kaio_liojoblist, lj, lioj_list); + /* + * Add extra aiocb count to avoid the lio to be freed + * by other threads doing aio_waitcomplete or aio_return, + * and prevent event from being sent until we have queued + * all tasks. + */ + lj->lioj_count = 1; + AIO_UNLOCK(ki); + + /* + * Get pointers to the list of I/O requests. + */ + nerror = 0; + for (i = 0; i < nent; i++) { + iocb = acb_list[i]; + if (iocb != NULL) { + error = aio_aqueue(td, iocb, lj, LIO_NOP, ops); + if (error != 0) + nerror++; + } + } + + error = 0; + AIO_LOCK(ki); + if (mode == LIO_WAIT) { + while (lj->lioj_count - 1 != lj->lioj_finished_count) { + ki->kaio_flags |= KAIO_WAKEUP; + error = msleep(&p->p_aioinfo, AIO_MTX(ki), + PRIBIO | PCATCH, "aiospn", 0); + if (error == ERESTART) + error = EINTR; + if (error) + break; + } + } else { + if (lj->lioj_count - 1 == lj->lioj_finished_count) { + if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) { + lj->lioj_flags |= LIOJ_KEVENT_POSTED; + KNOTE_LOCKED(&lj->klist, 1); + } + if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED)) + == LIOJ_SIGNAL + && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL || + lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) { + aio_sendsig(p, &lj->lioj_signal, + &lj->lioj_ksi); + lj->lioj_flags |= LIOJ_SIGNAL_POSTED; + } + } + } + lj->lioj_count--; + if (lj->lioj_count == 0) { + TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list); + knlist_delete(&lj->klist, curthread, 1); + PROC_LOCK(p); + sigqueue_take(&lj->lioj_ksi); + PROC_UNLOCK(p); + AIO_UNLOCK(ki); + uma_zfree(aiolio_zone, lj); + } else + AIO_UNLOCK(ki); + + if (nerror) + return (EIO); + return (error); +} + +/* syscall - list directed I/O (REALTIME) */ +int +sys_olio_listio(struct thread *td, struct olio_listio_args *uap) +{ + struct aiocb **acb_list; + struct sigevent *sigp, sig; + struct osigevent osig; + int error, nent; + + if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT)) + return (EINVAL); + + nent = uap->nent; + if (nent < 0 || nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (uap->sig && (uap->mode == LIO_NOWAIT)) { + error = copyin(uap->sig, &osig, sizeof(osig)); + if (error) + return (error); + error = convert_old_sigevent(&osig, &sig); + if (error) + return (error); + sigp = &sig; + } else + sigp = NULL; + + acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK); + error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0])); + if (error == 0) + error = kern_lio_listio(td, uap->mode, + (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp, + &aiocb_ops_osigevent); + free(acb_list, M_LIO); + return (error); +} + +/* syscall - list directed I/O (REALTIME) */ +int +sys_lio_listio(struct thread *td, struct lio_listio_args *uap) +{ + struct aiocb **acb_list; + struct sigevent *sigp, sig; + int error, nent; + + if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT)) + return (EINVAL); + + nent = uap->nent; + if (nent < 0 || nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (uap->sig && (uap->mode == LIO_NOWAIT)) { + error = copyin(uap->sig, &sig, sizeof(sig)); + if (error) + return (error); + sigp = &sig; + } else + sigp = NULL; + + acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK); + error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0])); + if (error == 0) + error = kern_lio_listio(td, uap->mode, uap->acb_list, acb_list, + nent, sigp, &aiocb_ops); + free(acb_list, M_LIO); + return (error); +} + +/* + * Called from interrupt thread for physio, we should return as fast + * as possible, so we schedule a biohelper task. + */ +static void +aio_physwakeup(struct buf *bp) +{ + struct aiocblist *aiocbe; + + aiocbe = (struct aiocblist *)bp->b_caller1; + taskqueue_enqueue(taskqueue_aiod_bio, &aiocbe->biotask); +} + +/* + * Task routine to perform heavy tasks, process wakeup, and signals. + */ +static void +biohelper(void *context, int pending) +{ + struct aiocblist *aiocbe = context; + struct buf *bp; + struct proc *userp; + struct kaioinfo *ki; + int nblks; + + bp = aiocbe->bp; + userp = aiocbe->userproc; + ki = userp->p_aioinfo; + AIO_LOCK(ki); + aiocbe->uaiocb._aiocb_private.status -= bp->b_resid; + aiocbe->uaiocb._aiocb_private.error = 0; + if (bp->b_ioflags & BIO_ERROR) + aiocbe->uaiocb._aiocb_private.error = bp->b_error; + nblks = btodb(aiocbe->uaiocb.aio_nbytes); + if (aiocbe->uaiocb.aio_lio_opcode == LIO_WRITE) + aiocbe->outputcharge += nblks; + else + aiocbe->inputcharge += nblks; + aiocbe->bp = NULL; + TAILQ_REMOVE(&userp->p_aioinfo->kaio_bufqueue, aiocbe, plist); + ki->kaio_buffer_count--; + aio_bio_done_notify(userp, aiocbe, DONE_BUF); + AIO_UNLOCK(ki); + + /* Release mapping into kernel space. */ + vunmapbuf(bp); + relpbuf(bp, NULL); + atomic_subtract_int(&num_buf_aio, 1); +} + +/* syscall - wait for the next completion of an aio request */ +static int +kern_aio_waitcomplete(struct thread *td, struct aiocb **aiocbp, + struct timespec *ts, struct aiocb_ops *ops) +{ + struct proc *p = td->td_proc; + struct timeval atv; + struct kaioinfo *ki; + struct aiocblist *cb; + struct aiocb *uuaiocb; + int error, status, timo; + + ops->store_aiocb(aiocbp, NULL); + + timo = 0; + if (ts) { + if ((ts->tv_nsec < 0) || (ts->tv_nsec >= 1000000000)) + return (EINVAL); + + TIMESPEC_TO_TIMEVAL(&atv, ts); + if (itimerfix(&atv)) + return (EINVAL); + timo = tvtohz(&atv); + } + + if (p->p_aioinfo == NULL) + aio_init_aioinfo(p); + ki = p->p_aioinfo; + + error = 0; + cb = NULL; + AIO_LOCK(ki); + while ((cb = TAILQ_FIRST(&ki->kaio_done)) == NULL) { + ki->kaio_flags |= KAIO_WAKEUP; + error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH, + "aiowc", timo); + if (timo && error == ERESTART) + error = EINTR; + if (error) + break; + } + + if (cb != NULL) { + MPASS(cb->jobstate == JOBST_JOBFINISHED); + uuaiocb = cb->uuaiocb; + status = cb->uaiocb._aiocb_private.status; + error = cb->uaiocb._aiocb_private.error; + td->td_retval[0] = status; + if (cb->uaiocb.aio_lio_opcode == LIO_WRITE) { + td->td_ru.ru_oublock += cb->outputcharge; + cb->outputcharge = 0; + } else if (cb->uaiocb.aio_lio_opcode == LIO_READ) { + td->td_ru.ru_inblock += cb->inputcharge; + cb->inputcharge = 0; + } + aio_free_entry(cb); + AIO_UNLOCK(ki); + ops->store_aiocb(aiocbp, uuaiocb); + ops->store_error(uuaiocb, error); + ops->store_status(uuaiocb, status); + } else + AIO_UNLOCK(ki); + + return (error); +} + +int +sys_aio_waitcomplete(struct thread *td, struct aio_waitcomplete_args *uap) +{ + struct timespec ts, *tsp; + int error; + + if (uap->timeout) { + /* Get timespec struct. */ + error = copyin(uap->timeout, &ts, sizeof(ts)); + if (error) + return (error); + tsp = &ts; + } else + tsp = NULL; + + return (kern_aio_waitcomplete(td, uap->aiocbp, tsp, &aiocb_ops)); +} + +static int +kern_aio_fsync(struct thread *td, int op, struct aiocb *aiocbp, + struct aiocb_ops *ops) +{ + struct proc *p = td->td_proc; + struct kaioinfo *ki; + + if (op != O_SYNC) /* XXX lack of O_DSYNC */ + return (EINVAL); + ki = p->p_aioinfo; + if (ki == NULL) + aio_init_aioinfo(p); + return (aio_aqueue(td, aiocbp, NULL, LIO_SYNC, ops)); +} + +int +sys_aio_fsync(struct thread *td, struct aio_fsync_args *uap) +{ + + return (kern_aio_fsync(td, uap->op, uap->aiocbp, &aiocb_ops)); +} + +/* kqueue attach function */ +static int +filt_aioattach(struct knote *kn) +{ + struct aiocblist *aiocbe = (struct aiocblist *)kn->kn_sdata; + + /* + * The aiocbe pointer must be validated before using it, so + * registration is restricted to the kernel; the user cannot + * set EV_FLAG1. + */ + if ((kn->kn_flags & EV_FLAG1) == 0) + return (EPERM); + kn->kn_ptr.p_aio = aiocbe; + kn->kn_flags &= ~EV_FLAG1; + + knlist_add(&aiocbe->klist, kn, 0); + + return (0); +} + +/* kqueue detach function */ +static void +filt_aiodetach(struct knote *kn) +{ + struct knlist *knl; + + knl = &kn->kn_ptr.p_aio->klist; + knl->kl_lock(knl->kl_lockarg); + if (!knlist_empty(knl)) + knlist_remove(knl, kn, 1); + knl->kl_unlock(knl->kl_lockarg); +} + +/* kqueue filter function */ +/*ARGSUSED*/ +static int +filt_aio(struct knote *kn, long hint) +{ + struct aiocblist *aiocbe = kn->kn_ptr.p_aio; + + kn->kn_data = aiocbe->uaiocb._aiocb_private.error; + if (aiocbe->jobstate != JOBST_JOBFINISHED) + return (0); + kn->kn_flags |= EV_EOF; + return (1); +} + +/* kqueue attach function */ +static int +filt_lioattach(struct knote *kn) +{ + struct aioliojob * lj = (struct aioliojob *)kn->kn_sdata; + + /* + * The aioliojob pointer must be validated before using it, so + * registration is restricted to the kernel; the user cannot + * set EV_FLAG1. + */ + if ((kn->kn_flags & EV_FLAG1) == 0) + return (EPERM); + kn->kn_ptr.p_lio = lj; + kn->kn_flags &= ~EV_FLAG1; + + knlist_add(&lj->klist, kn, 0); + + return (0); +} + +/* kqueue detach function */ +static void +filt_liodetach(struct knote *kn) +{ + struct knlist *knl; + + knl = &kn->kn_ptr.p_lio->klist; + knl->kl_lock(knl->kl_lockarg); + if (!knlist_empty(knl)) + knlist_remove(knl, kn, 1); + knl->kl_unlock(knl->kl_lockarg); +} + +/* kqueue filter function */ +/*ARGSUSED*/ +static int +filt_lio(struct knote *kn, long hint) +{ + struct aioliojob * lj = kn->kn_ptr.p_lio; + + return (lj->lioj_flags & LIOJ_KEVENT_POSTED); +} + +#ifdef COMPAT_FREEBSD32 + +struct __aiocb_private32 { + int32_t status; + int32_t error; + uint32_t kernelinfo; +}; + +typedef struct oaiocb32 { + int aio_fildes; /* File descriptor */ + uint64_t aio_offset __packed; /* File offset for I/O */ + uint32_t aio_buf; /* I/O buffer in process space */ + uint32_t aio_nbytes; /* Number of bytes for I/O */ + struct osigevent32 aio_sigevent; /* Signal to deliver */ + int aio_lio_opcode; /* LIO opcode */ + int aio_reqprio; /* Request priority -- ignored */ + struct __aiocb_private32 _aiocb_private; +} oaiocb32_t; + +typedef struct aiocb32 { + int32_t aio_fildes; /* File descriptor */ + uint64_t aio_offset __packed; /* File offset for I/O */ + uint32_t aio_buf; /* I/O buffer in process space */ + uint32_t aio_nbytes; /* Number of bytes for I/O */ + int __spare__[2]; + uint32_t __spare2__; + int aio_lio_opcode; /* LIO opcode */ + int aio_reqprio; /* Request priority -- ignored */ + struct __aiocb_private32 _aiocb_private; + struct sigevent32 aio_sigevent; /* Signal to deliver */ +} aiocb32_t; + +static int +convert_old_sigevent32(struct osigevent32 *osig, struct sigevent *nsig) +{ + + /* + * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are + * supported by AIO with the old sigevent structure. + */ + CP(*osig, *nsig, sigev_notify); + switch (nsig->sigev_notify) { + case SIGEV_NONE: + break; + case SIGEV_SIGNAL: + nsig->sigev_signo = osig->__sigev_u.__sigev_signo; + break; + case SIGEV_KEVENT: + nsig->sigev_notify_kqueue = + osig->__sigev_u.__sigev_notify_kqueue; + PTRIN_CP(*osig, *nsig, sigev_value.sival_ptr); + break; + default: + return (EINVAL); + } + return (0); +} + +static int +aiocb32_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob) +{ + struct oaiocb32 job32; + int error; + + bzero(kjob, sizeof(struct aiocb)); + error = copyin(ujob, &job32, sizeof(job32)); + if (error) + return (error); + + CP(job32, *kjob, aio_fildes); + CP(job32, *kjob, aio_offset); + PTRIN_CP(job32, *kjob, aio_buf); + CP(job32, *kjob, aio_nbytes); + CP(job32, *kjob, aio_lio_opcode); + CP(job32, *kjob, aio_reqprio); + CP(job32, *kjob, _aiocb_private.status); + CP(job32, *kjob, _aiocb_private.error); + PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo); + return (convert_old_sigevent32(&job32.aio_sigevent, + &kjob->aio_sigevent)); +} + +static int +convert_sigevent32(struct sigevent32 *sig32, struct sigevent *sig) +{ + + CP(*sig32, *sig, sigev_notify); + switch (sig->sigev_notify) { + case SIGEV_NONE: + break; + case SIGEV_THREAD_ID: + CP(*sig32, *sig, sigev_notify_thread_id); + /* FALLTHROUGH */ + case SIGEV_SIGNAL: + CP(*sig32, *sig, sigev_signo); + break; + case SIGEV_KEVENT: + CP(*sig32, *sig, sigev_notify_kqueue); + CP(*sig32, *sig, sigev_notify_kevent_flags); + PTRIN_CP(*sig32, *sig, sigev_value.sival_ptr); + break; + default: + return (EINVAL); + } + return (0); +} + +static int +aiocb32_copyin(struct aiocb *ujob, struct aiocb *kjob) +{ + struct aiocb32 job32; + int error; + + error = copyin(ujob, &job32, sizeof(job32)); + if (error) + return (error); + CP(job32, *kjob, aio_fildes); + CP(job32, *kjob, aio_offset); + PTRIN_CP(job32, *kjob, aio_buf); + CP(job32, *kjob, aio_nbytes); + CP(job32, *kjob, aio_lio_opcode); + CP(job32, *kjob, aio_reqprio); + CP(job32, *kjob, _aiocb_private.status); + CP(job32, *kjob, _aiocb_private.error); + PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo); + return (convert_sigevent32(&job32.aio_sigevent, &kjob->aio_sigevent)); +} + +static long +aiocb32_fetch_status(struct aiocb *ujob) +{ + struct aiocb32 *ujob32; + + ujob32 = (struct aiocb32 *)ujob; + return (fuword32(&ujob32->_aiocb_private.status)); +} + +static long +aiocb32_fetch_error(struct aiocb *ujob) +{ + struct aiocb32 *ujob32; + + ujob32 = (struct aiocb32 *)ujob; + return (fuword32(&ujob32->_aiocb_private.error)); +} + +static int +aiocb32_store_status(struct aiocb *ujob, long status) +{ + struct aiocb32 *ujob32; + + ujob32 = (struct aiocb32 *)ujob; + return (suword32(&ujob32->_aiocb_private.status, status)); +} + +static int +aiocb32_store_error(struct aiocb *ujob, long error) +{ + struct aiocb32 *ujob32; + + ujob32 = (struct aiocb32 *)ujob; + return (suword32(&ujob32->_aiocb_private.error, error)); +} + +static int +aiocb32_store_kernelinfo(struct aiocb *ujob, long jobref) +{ + struct aiocb32 *ujob32; + + ujob32 = (struct aiocb32 *)ujob; + return (suword32(&ujob32->_aiocb_private.kernelinfo, jobref)); +} + +static int +aiocb32_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob) +{ + + return (suword32(ujobp, (long)ujob)); +} + +static struct aiocb_ops aiocb32_ops = { + .copyin = aiocb32_copyin, + .fetch_status = aiocb32_fetch_status, + .fetch_error = aiocb32_fetch_error, + .store_status = aiocb32_store_status, + .store_error = aiocb32_store_error, + .store_kernelinfo = aiocb32_store_kernelinfo, + .store_aiocb = aiocb32_store_aiocb, +}; + +static struct aiocb_ops aiocb32_ops_osigevent = { + .copyin = aiocb32_copyin_old_sigevent, + .fetch_status = aiocb32_fetch_status, + .fetch_error = aiocb32_fetch_error, + .store_status = aiocb32_store_status, + .store_error = aiocb32_store_error, + .store_kernelinfo = aiocb32_store_kernelinfo, + .store_aiocb = aiocb32_store_aiocb, +}; + +int +freebsd32_aio_return(struct thread *td, struct freebsd32_aio_return_args *uap) +{ + + return (kern_aio_return(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops)); +} + +int +freebsd32_aio_suspend(struct thread *td, struct freebsd32_aio_suspend_args *uap) +{ + struct timespec32 ts32; + struct timespec ts, *tsp; + struct aiocb **ujoblist; + uint32_t *ujoblist32; + int error, i; + + if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (uap->timeout) { + /* Get timespec struct. */ + if ((error = copyin(uap->timeout, &ts32, sizeof(ts32))) != 0) + return (error); + CP(ts32, ts, tv_sec); + CP(ts32, ts, tv_nsec); + tsp = &ts; + } else + tsp = NULL; + + ujoblist = uma_zalloc(aiol_zone, M_WAITOK); + ujoblist32 = (uint32_t *)ujoblist; + error = copyin(uap->aiocbp, ujoblist32, uap->nent * + sizeof(ujoblist32[0])); + if (error == 0) { + for (i = uap->nent; i > 0; i--) + ujoblist[i] = PTRIN(ujoblist32[i]); + + error = kern_aio_suspend(td, uap->nent, ujoblist, tsp); + } + uma_zfree(aiol_zone, ujoblist); + return (error); +} + +int +freebsd32_aio_cancel(struct thread *td, struct freebsd32_aio_cancel_args *uap) +{ + + return (sys_aio_cancel(td, (struct aio_cancel_args *)uap)); +} + +int +freebsd32_aio_error(struct thread *td, struct freebsd32_aio_error_args *uap) +{ + + return (kern_aio_error(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops)); +} + +int +freebsd32_oaio_read(struct thread *td, struct freebsd32_oaio_read_args *uap) +{ + + return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ, + &aiocb32_ops_osigevent)); +} + +int +freebsd32_aio_read(struct thread *td, struct freebsd32_aio_read_args *uap) +{ + + return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ, + &aiocb32_ops)); +} + +int +freebsd32_oaio_write(struct thread *td, struct freebsd32_oaio_write_args *uap) +{ + + return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE, + &aiocb32_ops_osigevent)); +} + +int +freebsd32_aio_write(struct thread *td, struct freebsd32_aio_write_args *uap) +{ + + return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE, + &aiocb32_ops)); +} + +int +freebsd32_aio_waitcomplete(struct thread *td, + struct freebsd32_aio_waitcomplete_args *uap) +{ + struct timespec32 ts32; + struct timespec ts, *tsp; + int error; + + if (uap->timeout) { + /* Get timespec struct. */ + error = copyin(uap->timeout, &ts32, sizeof(ts32)); + if (error) + return (error); + CP(ts32, ts, tv_sec); + CP(ts32, ts, tv_nsec); + tsp = &ts; + } else + tsp = NULL; + + return (kern_aio_waitcomplete(td, (struct aiocb **)uap->aiocbp, tsp, + &aiocb32_ops)); +} + +int +freebsd32_aio_fsync(struct thread *td, struct freebsd32_aio_fsync_args *uap) +{ + + return (kern_aio_fsync(td, uap->op, (struct aiocb *)uap->aiocbp, + &aiocb32_ops)); +} + +int +freebsd32_olio_listio(struct thread *td, struct freebsd32_olio_listio_args *uap) +{ + struct aiocb **acb_list; + struct sigevent *sigp, sig; + struct osigevent32 osig; + uint32_t *acb_list32; + int error, i, nent; + + if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT)) + return (EINVAL); + + nent = uap->nent; + if (nent < 0 || nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (uap->sig && (uap->mode == LIO_NOWAIT)) { + error = copyin(uap->sig, &osig, sizeof(osig)); + if (error) + return (error); + error = convert_old_sigevent32(&osig, &sig); + if (error) + return (error); + sigp = &sig; + } else + sigp = NULL; + + acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK); + error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t)); + if (error) { + free(acb_list32, M_LIO); + return (error); + } + acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK); + for (i = 0; i < nent; i++) + acb_list[i] = PTRIN(acb_list32[i]); + free(acb_list32, M_LIO); + + error = kern_lio_listio(td, uap->mode, + (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp, + &aiocb32_ops_osigevent); + free(acb_list, M_LIO); + return (error); +} + +int +freebsd32_lio_listio(struct thread *td, struct freebsd32_lio_listio_args *uap) +{ + struct aiocb **acb_list; + struct sigevent *sigp, sig; + struct sigevent32 sig32; + uint32_t *acb_list32; + int error, i, nent; + + if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT)) + return (EINVAL); + + nent = uap->nent; + if (nent < 0 || nent > AIO_LISTIO_MAX) + return (EINVAL); + + if (uap->sig && (uap->mode == LIO_NOWAIT)) { + error = copyin(uap->sig, &sig32, sizeof(sig32)); + if (error) + return (error); + error = convert_sigevent32(&sig32, &sig); + if (error) + return (error); + sigp = &sig; + } else + sigp = NULL; + + acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK); + error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t)); + if (error) { + free(acb_list32, M_LIO); + return (error); + } + acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK); + for (i = 0; i < nent; i++) + acb_list[i] = PTRIN(acb_list32[i]); + free(acb_list32, M_LIO); + + error = kern_lio_listio(td, uap->mode, + (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp, + &aiocb32_ops); + free(acb_list, M_LIO); + return (error); +} + +#endif |
