mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
1c4bcd050a
td_ru. This removes the requirement for per-process synchronization in statclock() and mi_switch(). This was previously supported by sched_lock which is going away. All modifications to rusage are now done in the context of the owning thread. reads proceed without locks. - Aggregate exiting threads rusage in thread_exit() such that the exiting thread's rusage is not lost. - Provide a new routine, rufetch() to fetch an aggregate of all rusage structures from all threads in a process. This routine must be used in any place requiring a rusage from a process prior to it's exit. The exited process's rusage is still available via p_ru. - Aggregate tick statistics only on demand via rufetch() or when a thread exits. Tick statistics are kept in the thread and protected by sched_lock until it exits. Initial patch by: attilio Reviewed by: attilio, bde (some objections), arch (mostly silent)
2321 lines
58 KiB
C
2321 lines
58 KiB
C
/*-
|
|
* 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 <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.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
|
|
|
|
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 */
|
|
|
|
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 void 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, int osigev);
|
|
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 do_lio_listio(struct thread *td, struct lio_listio_args *uap, int oldsigev);
|
|
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 =
|
|
{ 0, filt_aioattach, filt_aiodetach, filt_aio };
|
|
static struct filterops lio_filtops =
|
|
{ 0, filt_lioattach, filt_liodetach, 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
|
|
};
|
|
|
|
SYSCALL_MODULE_HELPER(aio_cancel);
|
|
SYSCALL_MODULE_HELPER(aio_error);
|
|
SYSCALL_MODULE_HELPER(aio_fsync);
|
|
SYSCALL_MODULE_HELPER(aio_read);
|
|
SYSCALL_MODULE_HELPER(aio_return);
|
|
SYSCALL_MODULE_HELPER(aio_suspend);
|
|
SYSCALL_MODULE_HELPER(aio_waitcomplete);
|
|
SYSCALL_MODULE_HELPER(aio_write);
|
|
SYSCALL_MODULE_HELPER(lio_listio);
|
|
SYSCALL_MODULE_HELPER(oaio_read);
|
|
SYSCALL_MODULE_HELPER(oaio_write);
|
|
SYSCALL_MODULE_HELPER(olio_listio);
|
|
|
|
DECLARE_MODULE(aio, aio_mod,
|
|
SI_SUB_VFS, SI_ORDER_ANY);
|
|
MODULE_VERSION(aio, 1);
|
|
|
|
/*
|
|
* Startup initialization
|
|
*/
|
|
static void
|
|
aio_onceonly(void)
|
|
{
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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 < target_aio_procs)
|
|
aio_newproc(NULL);
|
|
}
|
|
|
|
static int
|
|
aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi)
|
|
{
|
|
int ret = 0;
|
|
|
|
PROC_LOCK(p);
|
|
if (!KSI_ONQ(ksi)) {
|
|
ksi->ksi_code = SI_ASYNCIO;
|
|
ksi->ksi_flags |= KSI_EXT | KSI_INS;
|
|
ret = psignal_event(p, sigev, ksi);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
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 vfslocked;
|
|
int error;
|
|
|
|
vfslocked = VFS_LOCK_GIANT(vp->v_mount);
|
|
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
|
|
goto drop;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
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, td);
|
|
vn_finished_write(mp);
|
|
drop:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
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 proc *mycp;
|
|
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;
|
|
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);
|
|
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. */
|
|
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
|
|
kthread_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 = kthread_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;
|
|
|
|
if (sb == &so->so_snd)
|
|
opcode = LIO_WRITE;
|
|
else
|
|
opcode = LIO_READ;
|
|
|
|
SOCKBUF_LOCK(sb);
|
|
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);
|
|
SOCKBUF_UNLOCK(sb);
|
|
}
|
|
|
|
/*
|
|
* 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, int oldsigev)
|
|
{
|
|
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;
|
|
|
|
if (p->p_aioinfo == NULL)
|
|
aio_init_aioinfo(p);
|
|
|
|
ki = p->p_aioinfo;
|
|
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, 0);
|
|
suword(&job->_aiocb_private.kernelinfo, -1);
|
|
|
|
if (num_queue_count >= max_queue_count ||
|
|
ki->kaio_count >= ki->kaio_qallowed_count) {
|
|
suword(&job->_aiocb_private.error, EAGAIN);
|
|
return (EAGAIN);
|
|
}
|
|
|
|
aiocbe = uma_zalloc(aiocb_zone, M_WAITOK | M_ZERO);
|
|
aiocbe->inputcharge = 0;
|
|
aiocbe->outputcharge = 0;
|
|
knlist_init(&aiocbe->klist, AIO_MTX(ki), NULL, NULL, NULL);
|
|
|
|
if (oldsigev) {
|
|
bzero(&aiocbe->uaiocb, sizeof(struct aiocb));
|
|
error = copyin(job, &aiocbe->uaiocb, sizeof(struct oaiocb));
|
|
bcopy(&aiocbe->uaiocb.__spare__, &aiocbe->uaiocb.aio_sigevent,
|
|
sizeof(struct osigevent));
|
|
} else {
|
|
error = copyin(job, &aiocbe->uaiocb, sizeof(struct aiocb));
|
|
}
|
|
if (error) {
|
|
suword(&job->_aiocb_private.error, error);
|
|
uma_zfree(aiocb_zone, aiocbe);
|
|
return (error);
|
|
}
|
|
|
|
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) {
|
|
suword(&job->_aiocb_private.error, 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;
|
|
|
|
/* Fetch the file object for the specified file descriptor. */
|
|
fd = aiocbe->uaiocb.aio_fildes;
|
|
switch (opcode) {
|
|
case LIO_WRITE:
|
|
error = fget_write(td, fd, &fp);
|
|
break;
|
|
case LIO_READ:
|
|
error = fget_read(td, fd, &fp);
|
|
break;
|
|
default:
|
|
error = fget(td, fd, &fp);
|
|
}
|
|
if (error) {
|
|
uma_zfree(aiocb_zone, aiocbe);
|
|
suword(&job->_aiocb_private.error, 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 = suword(&job->_aiocb_private.kernelinfo, 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 ((opcode != LIO_READ) && (opcode != LIO_WRITE) &&
|
|
(opcode != LIO_SYNC)) {
|
|
error = EINVAL;
|
|
goto aqueue_fail;
|
|
}
|
|
|
|
if (aiocbe->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT)
|
|
goto no_kqueue;
|
|
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;
|
|
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);
|
|
suword(&job->_aiocb_private.error, error);
|
|
goto done;
|
|
}
|
|
no_kqueue:
|
|
|
|
suword(&job->_aiocb_private.error, 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;
|
|
suword(&job->_aiocb_private.error, 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.
|
|
*/
|
|
int
|
|
aio_return(struct thread *td, struct aio_return_args *uap)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct aiocblist *cb;
|
|
struct aiocb *uaiocb;
|
|
struct kaioinfo *ki;
|
|
int status, error;
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL)
|
|
return (EINVAL);
|
|
uaiocb = uap->aiocbp;
|
|
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);
|
|
suword(&uaiocb->_aiocb_private.error, error);
|
|
suword(&uaiocb->_aiocb_private.status, status);
|
|
} else {
|
|
error = EINVAL;
|
|
AIO_UNLOCK(ki);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Allow a process to wakeup when any of the I/O requests are completed.
|
|
*/
|
|
int
|
|
aio_suspend(struct thread *td, struct aio_suspend_args *uap)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct timeval atv;
|
|
struct timespec ts;
|
|
struct aiocb *const *cbptr, *cbp;
|
|
struct kaioinfo *ki;
|
|
struct aiocblist *cb, *cbfirst;
|
|
struct aiocb **ujoblist;
|
|
int njoblist;
|
|
int error;
|
|
int timo;
|
|
int i;
|
|
|
|
if (uap->nent < 0 || uap->nent > AIO_LISTIO_MAX)
|
|
return (EINVAL);
|
|
|
|
timo = 0;
|
|
if (uap->timeout) {
|
|
/* Get timespec struct. */
|
|
if ((error = copyin(uap->timeout, &ts, sizeof(ts))) != 0)
|
|
return (error);
|
|
|
|
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);
|
|
|
|
njoblist = 0;
|
|
ujoblist = uma_zalloc(aiol_zone, M_WAITOK);
|
|
cbptr = uap->aiocbp;
|
|
|
|
for (i = 0; i < uap->nent; i++) {
|
|
cbp = (struct aiocb *)(intptr_t)fuword(&cbptr[i]);
|
|
if (cbp == 0)
|
|
continue;
|
|
ujoblist[njoblist] = cbp;
|
|
njoblist++;
|
|
}
|
|
|
|
if (njoblist == 0) {
|
|
uma_zfree(aiol_zone, ujoblist);
|
|
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);
|
|
uma_zfree(aiol_zone, ujoblist);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* aio_cancel cancels any non-physio aio operations not currently in
|
|
* progress.
|
|
*/
|
|
int
|
|
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, &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.
|
|
*/
|
|
int
|
|
aio_error(struct thread *td, struct aio_error_args *uap)
|
|
{
|
|
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 == uap->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 = fuword(&uap->aiocbp->_aiocb_private.status);
|
|
if (status == -1) {
|
|
td->td_retval[0] = fuword(&uap->aiocbp->_aiocb_private.error);
|
|
return (0);
|
|
}
|
|
|
|
td->td_retval[0] = EINVAL;
|
|
return (0);
|
|
}
|
|
|
|
/* syscall - asynchronous read from a file (REALTIME) */
|
|
int
|
|
oaio_read(struct thread *td, struct oaio_read_args *uap)
|
|
{
|
|
|
|
return aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ, 1);
|
|
}
|
|
|
|
int
|
|
aio_read(struct thread *td, struct aio_read_args *uap)
|
|
{
|
|
|
|
return aio_aqueue(td, uap->aiocbp, NULL, LIO_READ, 0);
|
|
}
|
|
|
|
/* syscall - asynchronous write to a file (REALTIME) */
|
|
int
|
|
oaio_write(struct thread *td, struct oaio_write_args *uap)
|
|
{
|
|
|
|
return aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE, 1);
|
|
}
|
|
|
|
int
|
|
aio_write(struct thread *td, struct aio_write_args *uap)
|
|
{
|
|
|
|
return aio_aqueue(td, uap->aiocbp, NULL, LIO_WRITE, 0);
|
|
}
|
|
|
|
/* syscall - list directed I/O (REALTIME) */
|
|
int
|
|
olio_listio(struct thread *td, struct olio_listio_args *uap)
|
|
{
|
|
return do_lio_listio(td, (struct lio_listio_args *)uap, 1);
|
|
}
|
|
|
|
/* syscall - list directed I/O (REALTIME) */
|
|
int
|
|
lio_listio(struct thread *td, struct lio_listio_args *uap)
|
|
{
|
|
return do_lio_listio(td, uap, 0);
|
|
}
|
|
|
|
static int
|
|
do_lio_listio(struct thread *td, struct lio_listio_args *uap, int oldsigev)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct aiocb *iocb, * const *cbptr;
|
|
struct kaioinfo *ki;
|
|
struct aioliojob *lj;
|
|
struct kevent kev;
|
|
int nent;
|
|
int error;
|
|
int nerror;
|
|
int i;
|
|
|
|
if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
|
|
return (EINVAL);
|
|
|
|
nent = uap->nent;
|
|
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(&lj->klist, AIO_MTX(ki), NULL, NULL, NULL);
|
|
ksiginfo_init(&lj->lioj_ksi);
|
|
|
|
/*
|
|
* Setup signal.
|
|
*/
|
|
if (uap->sig && (uap->mode == LIO_NOWAIT)) {
|
|
bzero(&lj->lioj_signal, sizeof(&lj->lioj_signal));
|
|
error = copyin(uap->sig, &lj->lioj_signal,
|
|
oldsigev ? sizeof(struct osigevent) :
|
|
sizeof(struct sigevent));
|
|
if (error) {
|
|
uma_zfree(aiolio_zone, lj);
|
|
return (error);
|
|
}
|
|
|
|
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)uap->acb_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;
|
|
cbptr = uap->acb_list;
|
|
for (i = 0; i < uap->nent; i++) {
|
|
iocb = (struct aiocb *)(intptr_t)fuword(&cbptr[i]);
|
|
if (((intptr_t)iocb != -1) && ((intptr_t)iocb != 0)) {
|
|
error = aio_aqueue(td, iocb, lj, LIO_NOP, oldsigev);
|
|
if (error != 0)
|
|
nerror++;
|
|
}
|
|
}
|
|
|
|
error = 0;
|
|
AIO_LOCK(ki);
|
|
if (uap->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);
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
int
|
|
aio_waitcomplete(struct thread *td, struct aio_waitcomplete_args *uap)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct timeval atv;
|
|
struct timespec ts;
|
|
struct kaioinfo *ki;
|
|
struct aiocblist *cb;
|
|
struct aiocb *uuaiocb;
|
|
int error, status, timo;
|
|
|
|
suword(uap->aiocbp, (long)NULL);
|
|
|
|
timo = 0;
|
|
if (uap->timeout) {
|
|
/* Get timespec struct. */
|
|
error = copyin(uap->timeout, &ts, sizeof(ts));
|
|
if (error)
|
|
return (error);
|
|
|
|
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);
|
|
suword(uap->aiocbp, (long)uuaiocb);
|
|
suword(&uuaiocb->_aiocb_private.error, error);
|
|
suword(&uuaiocb->_aiocb_private.status, status);
|
|
} else
|
|
AIO_UNLOCK(ki);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
aio_fsync(struct thread *td, struct aio_fsync_args *uap)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct kaioinfo *ki;
|
|
|
|
if (uap->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, uap->aiocbp, NULL, LIO_SYNC, 0);
|
|
}
|
|
|
|
/* 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_flags &= ~EV_FLAG1;
|
|
|
|
knlist_add(&aiocbe->klist, kn, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* kqueue detach function */
|
|
static void
|
|
filt_aiodetach(struct knote *kn)
|
|
{
|
|
struct aiocblist *aiocbe = (struct aiocblist *)kn->kn_sdata;
|
|
|
|
if (!knlist_empty(&aiocbe->klist))
|
|
knlist_remove(&aiocbe->klist, kn, 0);
|
|
}
|
|
|
|
/* kqueue filter function */
|
|
/*ARGSUSED*/
|
|
static int
|
|
filt_aio(struct knote *kn, long hint)
|
|
{
|
|
struct aiocblist *aiocbe = (struct aiocblist *)kn->kn_sdata;
|
|
|
|
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_flags &= ~EV_FLAG1;
|
|
|
|
knlist_add(&lj->klist, kn, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* kqueue detach function */
|
|
static void
|
|
filt_liodetach(struct knote *kn)
|
|
{
|
|
struct aioliojob * lj = (struct aioliojob *)kn->kn_sdata;
|
|
|
|
if (!knlist_empty(&lj->klist))
|
|
knlist_remove(&lj->klist, kn, 0);
|
|
}
|
|
|
|
/* kqueue filter function */
|
|
/*ARGSUSED*/
|
|
static int
|
|
filt_lio(struct knote *kn, long hint)
|
|
{
|
|
struct aioliojob * lj = (struct aioliojob *)kn->kn_sdata;
|
|
|
|
return (lj->lioj_flags & LIOJ_KEVENT_POSTED);
|
|
}
|