36e7a51ea1
Distribute all but the most fundamental malloc types. This time I also remembered the trick to making things static: Put "static" in front of them. A couple of finer points by: bde
1383 lines
31 KiB
C
1383 lines
31 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.
|
|
*
|
|
* $Id: vfs_aio.c,v 1.7 1997/10/11 18:31:25 phk Exp $
|
|
*/
|
|
|
|
/*
|
|
* This file contains support for the POSIX.4 AIO facility.
|
|
*
|
|
* The initial version provides only the (bogus) synchronous semantics
|
|
* but will support async in the future. Note that a bit
|
|
* in a private field allows the user mode subroutine to adapt
|
|
* the kernel operations to true POSIX.4 for future compatibility.
|
|
*
|
|
* This code is used to support true POSIX.4 AIO/LIO with the help
|
|
* of a user mode subroutine package. Note that eventually more support
|
|
* will be pushed into the kernel.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/file.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/vm_extern.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
#include <sys/aio.h>
|
|
#include <sys/shm.h>
|
|
|
|
#include <machine/cpu.h>
|
|
|
|
static MALLOC_DEFINE(M_AIO, "AIO", "AIO structure(s)");
|
|
|
|
#define AIOCBLIST_CANCELLED 0x1
|
|
#define AIOCBLIST_RUNDOWN 0x4
|
|
#define AIOCBLIST_ASYNCFREE 0x8
|
|
#define AIOCBLIST_SUSPEND 0x10
|
|
|
|
#if 0
|
|
#define DEBUGAIO
|
|
#define DIAGNOSTIC
|
|
#endif
|
|
|
|
#define DEBUGAIO 1
|
|
|
|
static int jobrefid;
|
|
|
|
#define JOBST_NULL 0x0
|
|
#define JOBST_JOBQPROC 0x1
|
|
#define JOBST_JOBQGLOBAL 0x2
|
|
#define JOBST_JOBRUNNING 0x3
|
|
#define JOBST_JOBFINISHED 0x4
|
|
|
|
#define MAX_AIO_PER_PROC 32
|
|
#define MAX_AIO_QUEUE_PER_PROC 256 /* Bigger than AIO_LISTIO_MAX */
|
|
#define MAX_AIO_PROCS 128
|
|
#define MAX_AIO_QUEUE 1024 /* Bigger than AIO_LISTIO_MAX */
|
|
#define TARGET_AIO_PROCS 64
|
|
|
|
int max_aio_procs = MAX_AIO_PROCS;
|
|
int num_aio_procs = 0;
|
|
int target_aio_procs = TARGET_AIO_PROCS;
|
|
int max_queue_count = MAX_AIO_QUEUE;
|
|
int num_queue_count = 0;
|
|
|
|
int max_aio_per_proc = MAX_AIO_PER_PROC,
|
|
max_aio_queue_per_proc=MAX_AIO_QUEUE_PER_PROC;
|
|
|
|
|
|
SYSCTL_NODE(_vfs, OID_AUTO, aio, CTLFLAG_RW, 0, "AIO mgmt");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_per_proc,
|
|
CTLFLAG_RW, &max_aio_per_proc, 0, "");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue_per_proc,
|
|
CTLFLAG_RW, &max_aio_queue_per_proc, 0, "");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_procs,
|
|
CTLFLAG_RW, &max_aio_procs, 0, "");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, num_aio_procs,
|
|
CTLFLAG_RD, &num_aio_procs, 0, "");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, num_queue_count,
|
|
CTLFLAG_RD, &num_queue_count, 0, "");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue,
|
|
CTLFLAG_RW, &max_queue_count, 0, "");
|
|
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, target_aio_procs,
|
|
CTLFLAG_RW, &target_aio_procs, 0, "");
|
|
|
|
#if DEBUGAIO > 0
|
|
static int debugaio;
|
|
SYSCTL_INT(_vfs_aio, OID_AUTO, debugaio, CTLFLAG_RW, &debugaio, 0, "");
|
|
#endif
|
|
|
|
/*
|
|
* Job queue item
|
|
*/
|
|
struct aiocblist {
|
|
TAILQ_ENTRY (aiocblist) list; /* List of jobs */
|
|
TAILQ_ENTRY (aiocblist) plist; /* List of jobs for proc */
|
|
int jobflags;
|
|
int jobstate;
|
|
struct proc *userproc; /* User process */
|
|
struct aioproclist *jobaioproc; /* AIO process descriptor */
|
|
struct aiocb uaiocb; /* Kernel I/O control block */
|
|
};
|
|
|
|
#define AIOP_FREE 0x1 /* proc on free queue */
|
|
/*
|
|
* AIO process info
|
|
*/
|
|
struct aioproclist {
|
|
int aioprocflags; /* AIO proc flags */
|
|
TAILQ_ENTRY(aioproclist) list; /* List of processes */
|
|
struct proc *aioproc; /* The AIO thread */
|
|
TAILQ_HEAD (,aiocblist) jobtorun; /* suggested job to run */
|
|
};
|
|
|
|
struct kaioinfo {
|
|
int kaio_maxactive_count; /* maximum number of AIOs */
|
|
int kaio_active_count; /* number of currently used AIOs */
|
|
int kaio_qallowed_count; /* maxiumu size of AIO queue */
|
|
int kaio_queue_count; /* size of AIO queue */
|
|
TAILQ_HEAD (,aiocblist) kaio_jobqueue; /* job queue for process */
|
|
TAILQ_HEAD (,aiocblist) kaio_jobdone; /* done queue for process */
|
|
};
|
|
|
|
TAILQ_HEAD (,aioproclist) aio_freeproc, aio_activeproc;
|
|
TAILQ_HEAD(,aiocblist) aio_jobs; /* Async job list */
|
|
TAILQ_HEAD(,aiocblist) aio_freejobs;
|
|
|
|
|
|
void aio_init_aioinfo(struct proc *p) ;
|
|
void aio_onceonly(void *) ;
|
|
int aio_free_entry(struct aiocblist *aiocbe);
|
|
void aio_cancel_internal(struct aiocblist *aiocbe);
|
|
void aio_process(struct aiocblist *aiocbe);
|
|
void pmap_newvmspace(struct vmspace *);
|
|
static int aio_newproc(void) ;
|
|
static int aio_aqueue(struct proc *p, struct aiocb *job, int type) ;
|
|
static void aio_marksuspend(struct proc *p, int njobs, int *joblist, int set) ;
|
|
|
|
SYSINIT(aio, SI_SUB_VFS, SI_ORDER_ANY, aio_onceonly, NULL);
|
|
|
|
|
|
/*
|
|
* Startup initialization
|
|
*/
|
|
void
|
|
aio_onceonly(void *na) {
|
|
TAILQ_INIT(&aio_freeproc);
|
|
TAILQ_INIT(&aio_activeproc);
|
|
TAILQ_INIT(&aio_jobs);
|
|
TAILQ_INIT(&aio_freejobs);
|
|
}
|
|
|
|
/*
|
|
* Init the per-process aioinfo structure.
|
|
*/
|
|
void
|
|
aio_init_aioinfo(struct proc *p) {
|
|
struct kaioinfo *ki;
|
|
if (p->p_aioinfo == NULL) {
|
|
ki = malloc(sizeof (struct kaioinfo), M_AIO, M_WAITOK);
|
|
p->p_aioinfo = ki;
|
|
ki->kaio_maxactive_count = max_aio_per_proc;
|
|
ki->kaio_active_count = 0;
|
|
ki->kaio_qallowed_count = max_aio_queue_per_proc;
|
|
ki->kaio_queue_count = 0;
|
|
TAILQ_INIT(&ki->kaio_jobdone);
|
|
TAILQ_INIT(&ki->kaio_jobqueue);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
aio_free_entry(struct aiocblist *aiocbe) {
|
|
struct kaioinfo *ki;
|
|
struct aioproclist *aiop;
|
|
struct proc *p;
|
|
|
|
if (aiocbe->jobstate == JOBST_NULL)
|
|
panic("aio_free_entry: freeing already free job");
|
|
|
|
p = aiocbe->userproc;
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL)
|
|
panic("aio_free_entry: missing p->p_aioinfo");
|
|
|
|
if (aiocbe->jobstate == JOBST_JOBRUNNING) {
|
|
if (aiocbe->jobflags & AIOCBLIST_ASYNCFREE)
|
|
return 0;
|
|
aiocbe->jobflags |= AIOCBLIST_RUNDOWN;
|
|
tsleep(aiocbe, PRIBIO|PCATCH, "jobwai", 0);
|
|
/*
|
|
if (tsleep(aiocbe, PRIBIO|PCATCH, "jobwai", hz*5)) {
|
|
aiocbe->jobflags |= AIOCBLIST_ASYNCFREE;
|
|
aiocbe->jobflags &= ~AIOCBLIST_RUNDOWN;
|
|
return 1;
|
|
}
|
|
aiocbe->jobflags &= ~AIOCBLIST_RUNDOWN;
|
|
*/
|
|
}
|
|
aiocbe->jobflags &= ~AIOCBLIST_ASYNCFREE;
|
|
|
|
if (ki->kaio_queue_count <= 0)
|
|
panic("aio_free_entry: process queue size <= 0");
|
|
if (num_queue_count <= 0)
|
|
panic("aio_free_entry: system wide queue size <= 0");
|
|
|
|
--ki->kaio_queue_count;
|
|
--num_queue_count;
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("freeing entry: %d, %d\n",
|
|
ki->kaio_queue_count, num_queue_count);
|
|
#endif
|
|
|
|
if ( aiocbe->jobstate == JOBST_JOBQPROC) {
|
|
aiop = aiocbe->jobaioproc;
|
|
TAILQ_REMOVE(&aiop->jobtorun, aiocbe, list);
|
|
} else if ( aiocbe->jobstate == JOBST_JOBQGLOBAL) {
|
|
TAILQ_REMOVE(&aio_jobs, aiocbe, list);
|
|
} else if ( aiocbe->jobstate == JOBST_JOBFINISHED) {
|
|
ki = p->p_aioinfo;
|
|
TAILQ_REMOVE(&ki->kaio_jobdone, aiocbe, plist);
|
|
}
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
aiocbe->jobstate = JOBST_NULL;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Rundown the jobs for a given process.
|
|
*/
|
|
void
|
|
aio_proc_rundown(struct proc *p) {
|
|
struct kaioinfo *ki;
|
|
struct aiocblist *aiocbe, *aiocbn;
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL)
|
|
return;
|
|
|
|
while (ki->kaio_active_count > 0) {
|
|
if (tsleep(ki, PRIBIO, "kaiowt", 60 * hz))
|
|
break;
|
|
}
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("Proc rundown: %d %d\n",
|
|
num_queue_count, ki->kaio_queue_count);
|
|
#endif
|
|
|
|
restart1:
|
|
for ( aiocbe = TAILQ_FIRST(&ki->kaio_jobdone);
|
|
aiocbe;
|
|
aiocbe = aiocbn) {
|
|
aiocbn = TAILQ_NEXT(aiocbe, plist);
|
|
if (aio_free_entry(aiocbe))
|
|
goto restart1;
|
|
}
|
|
|
|
restart2:
|
|
for ( aiocbe = TAILQ_FIRST(&ki->kaio_jobqueue);
|
|
aiocbe;
|
|
aiocbe = aiocbn) {
|
|
aiocbn = TAILQ_NEXT(aiocbe, plist);
|
|
if (aio_free_entry(aiocbe))
|
|
goto restart2;
|
|
}
|
|
free(ki, M_AIO);
|
|
p->p_aioinfo = NULL;
|
|
}
|
|
|
|
/*
|
|
* Select a job to run (called by an AIO daemon)
|
|
*/
|
|
static struct aiocblist *
|
|
aio_selectjob(struct aioproclist *aiop) {
|
|
|
|
struct aiocblist *aiocbe;
|
|
|
|
aiocbe = TAILQ_FIRST(&aiop->jobtorun);
|
|
if (aiocbe) {
|
|
TAILQ_REMOVE(&aiop->jobtorun, aiocbe, list);
|
|
return aiocbe;
|
|
}
|
|
|
|
for (aiocbe = TAILQ_FIRST(&aio_jobs);
|
|
aiocbe;
|
|
aiocbe = TAILQ_NEXT(aiocbe, list)) {
|
|
struct kaioinfo *ki;
|
|
struct proc *userp;
|
|
|
|
userp = aiocbe->userproc;
|
|
ki = userp->p_aioinfo;
|
|
|
|
if (ki->kaio_active_count < ki->kaio_maxactive_count) {
|
|
TAILQ_REMOVE(&aio_jobs, aiocbe, list);
|
|
return aiocbe;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* The AIO activity proper.
|
|
*/
|
|
void
|
|
aio_process(struct aiocblist *aiocbe) {
|
|
struct filedesc *fdp;
|
|
struct proc *userp;
|
|
struct aiocb *cb;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
unsigned int fd;
|
|
int cnt;
|
|
int error;
|
|
off_t offset;
|
|
|
|
userp = aiocbe->userproc;
|
|
cb = &aiocbe->uaiocb;
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 1)
|
|
printf("AIO %s, fd: %d, offset: 0x%x, address: 0x%x, size: %d\n",
|
|
cb->aio_lio_opcode == LIO_READ?"Read":"Write",
|
|
cb->aio_fildes, (int) cb->aio_offset,
|
|
cb->aio_buf, cb->aio_nbytes);
|
|
#endif
|
|
#if SLOW
|
|
tsleep(curproc, PVM, "aioprc", hz);
|
|
#endif
|
|
fdp = curproc->p_fd;
|
|
/*
|
|
* Range check file descriptor
|
|
*/
|
|
fd = cb->aio_fildes;
|
|
fp = fdp->fd_ofiles[fd];
|
|
|
|
aiov.iov_base = cb->aio_buf;
|
|
aiov.iov_len = cb->aio_nbytes;
|
|
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = offset = cb->aio_offset;
|
|
auio.uio_resid = cb->aio_nbytes;
|
|
cnt = cb->aio_nbytes;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = curproc;
|
|
|
|
if (cb->aio_lio_opcode == LIO_READ) {
|
|
auio.uio_rw = UIO_READ;
|
|
error = (*fp->f_ops->fo_read)(fp, &auio, fp->f_cred);
|
|
} else {
|
|
auio.uio_rw = UIO_WRITE;
|
|
error = (*fp->f_ops->fo_write)(fp, &auio, fp->f_cred);
|
|
}
|
|
|
|
if (error) {
|
|
if (auio.uio_resid != cnt) {
|
|
if (error == ERESTART || error == EINTR || error == EWOULDBLOCK)
|
|
error = 0;
|
|
if ((error == EPIPE) && (cb->aio_lio_opcode == LIO_WRITE))
|
|
psignal(userp, SIGPIPE);
|
|
}
|
|
}
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 1)
|
|
printf("%s complete: error: %d, status: %d, nio: %d, resid: %d, offset: %d\n",
|
|
cb->aio_lio_opcode == LIO_READ?"Read":"Write",
|
|
error, cnt, cnt - auio.uio_resid, auio.uio_resid, (int) offset & 0xffffffff);
|
|
#endif
|
|
|
|
cnt -= auio.uio_resid;
|
|
cb->_aiocb_private.error = error;
|
|
cb->_aiocb_private.status = cnt;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/*
|
|
* The AIO daemon.
|
|
*/
|
|
static void
|
|
aio_startproc(void *uproc)
|
|
{
|
|
struct aioproclist *aiop;
|
|
|
|
/*
|
|
* Allocate and ready the aio control info
|
|
*/
|
|
aiop = malloc(sizeof *aiop, M_AIO, M_WAITOK);
|
|
aiop->aioproc = curproc;
|
|
aiop->aioprocflags |= AIOP_FREE;
|
|
TAILQ_INSERT_HEAD(&aio_freeproc, aiop, list);
|
|
TAILQ_INIT(&aiop->jobtorun);
|
|
|
|
/*
|
|
* Get rid of current address space
|
|
*/
|
|
if (curproc->p_vmspace->vm_refcnt == 1) {
|
|
if (curproc->p_vmspace->vm_shm)
|
|
shmexit(curproc);
|
|
pmap_remove_pages(&curproc->p_vmspace->vm_pmap, 0, USRSTACK);
|
|
vm_map_remove(&curproc->p_vmspace->vm_map, 0, USRSTACK);
|
|
} else {
|
|
vmspace_exec(curproc);
|
|
}
|
|
|
|
/*
|
|
* Make up a name for the daemon
|
|
*/
|
|
strcpy(curproc->p_comm, "aiodaemon");
|
|
|
|
/*
|
|
* Get rid of our current filedescriptors
|
|
*/
|
|
fdfree(curproc);
|
|
curproc->p_fd = NULL;
|
|
curproc->p_ucred = crcopy(curproc->p_ucred);
|
|
curproc->p_ucred->cr_uid = 0;
|
|
curproc->p_ucred->cr_groups[0] = 1;
|
|
curproc->p_flag |= P_SYSTEM;
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf("Started new process: %d\n", curproc->p_pid);
|
|
#endif
|
|
wakeup(&aio_freeproc);
|
|
|
|
while(1) {
|
|
struct vmspace *myvm, *tmpvm;
|
|
struct proc *cp = curproc;
|
|
struct proc *up = NULL;
|
|
struct aiocblist *aiocbe;
|
|
|
|
if ((aiop->aioprocflags & AIOP_FREE) == 0) {
|
|
TAILQ_INSERT_HEAD(&aio_freeproc, aiop, list);
|
|
aiop->aioprocflags |= AIOP_FREE;
|
|
}
|
|
if (tsleep(cp, PRIBIO, "aiordy", hz*30)) {
|
|
if ((num_aio_procs > target_aio_procs) &&
|
|
(TAILQ_FIRST(&aiop->jobtorun) == NULL))
|
|
exit1(curproc, 0);
|
|
}
|
|
|
|
if (aiop->aioprocflags & AIOP_FREE) {
|
|
TAILQ_REMOVE(&aio_freeproc, aiop, list);
|
|
TAILQ_INSERT_TAIL(&aio_activeproc, aiop, list);
|
|
aiop->aioprocflags &= ~AIOP_FREE;
|
|
}
|
|
|
|
myvm = curproc->p_vmspace;
|
|
|
|
while ( aiocbe = aio_selectjob(aiop)) {
|
|
struct aiocb *cb;
|
|
struct kaioinfo *ki;
|
|
struct proc *userp;
|
|
|
|
cb = &aiocbe->uaiocb;
|
|
userp = aiocbe->userproc;
|
|
ki = userp->p_aioinfo;
|
|
|
|
aiocbe->jobstate = JOBST_JOBRUNNING;
|
|
if (userp != cp) {
|
|
tmpvm = curproc->p_vmspace;
|
|
curproc->p_vmspace = userp->p_vmspace;
|
|
++curproc->p_vmspace->vm_refcnt;
|
|
pmap_activate(curproc);
|
|
if (tmpvm != myvm) {
|
|
vmspace_free(tmpvm);
|
|
}
|
|
if (curproc->p_fd)
|
|
fdfree(curproc);
|
|
curproc->p_fd = fdshare(userp);
|
|
cp = userp;
|
|
}
|
|
|
|
ki->kaio_active_count++;
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("process: pid: %d(%d), active: %d, queue: %d\n",
|
|
cb->_aiocb_private.kernelinfo,
|
|
userp->p_pid, ki->kaio_active_count, ki->kaio_queue_count);
|
|
#endif
|
|
aiocbe->jobaioproc = aiop;
|
|
aio_process(aiocbe);
|
|
--ki->kaio_active_count;
|
|
if (ki->kaio_active_count == 0)
|
|
wakeup(ki);
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("DONE process: pid: %d(%d), active: %d, queue: %d\n",
|
|
cb->_aiocb_private.kernelinfo,
|
|
userp->p_pid, ki->kaio_active_count, ki->kaio_queue_count);
|
|
#endif
|
|
|
|
aiocbe->jobstate = JOBST_JOBFINISHED;
|
|
|
|
if (aiocbe->jobflags & AIOCBLIST_ASYNCFREE) {
|
|
aiocbe->jobflags &= ~AIOCBLIST_ASYNCFREE;
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
} else {
|
|
TAILQ_REMOVE(&ki->kaio_jobqueue,
|
|
aiocbe, plist);
|
|
TAILQ_INSERT_TAIL(&ki->kaio_jobdone,
|
|
aiocbe, plist);
|
|
}
|
|
|
|
if (aiocbe->jobflags & AIOCBLIST_RUNDOWN) {
|
|
wakeup(aiocbe);
|
|
aiocbe->jobflags &= ~AIOCBLIST_RUNDOWN;
|
|
}
|
|
|
|
if (aiocbe->jobflags & AIOCBLIST_SUSPEND) {
|
|
wakeup(userp);
|
|
aiocbe->jobflags &= ~AIOCBLIST_SUSPEND;
|
|
}
|
|
|
|
if (cb->aio_sigevent.sigev_notify == SIGEV_SIGNAL) {
|
|
psignal(userp, cb->aio_sigevent.sigev_signo);
|
|
}
|
|
}
|
|
|
|
if (cp != curproc) {
|
|
tmpvm = curproc->p_vmspace;
|
|
curproc->p_vmspace = myvm;
|
|
pmap_activate(curproc);
|
|
vmspace_free(tmpvm);
|
|
if (curproc->p_fd)
|
|
fdfree(curproc);
|
|
curproc->p_fd = NULL;
|
|
cp = curproc;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create a new AIO daemon.
|
|
*/
|
|
static int
|
|
aio_newproc() {
|
|
int error;
|
|
int rval[2];
|
|
struct rfork_args rfa;
|
|
struct proc *p;
|
|
|
|
rfa.flags = RFMEM | RFPROC | RFCFDG;
|
|
|
|
if (error = rfork(curproc, &rfa, &rval[0]))
|
|
return error;
|
|
|
|
cpu_set_fork_handler(p = pfind(rval[0]), aio_startproc, curproc);
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf("Waiting for new process: %d, count: %d\n",
|
|
curproc->p_pid, num_aio_procs);
|
|
#endif
|
|
|
|
error = tsleep(&aio_freeproc, PZERO, "aiosta", 5*hz);
|
|
++num_aio_procs;
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
/*
|
|
* Queue a new AIO request.
|
|
*/
|
|
static int
|
|
_aio_aqueue(struct proc *p, struct aiocb *job, int type) {
|
|
struct filedesc *fdp;
|
|
struct file *fp;
|
|
unsigned int fd;
|
|
|
|
int error;
|
|
int opcode;
|
|
struct aiocblist *aiocbe;
|
|
struct aioproclist *aiop;
|
|
struct kaioinfo *ki;
|
|
|
|
if (aiocbe = TAILQ_FIRST(&aio_freejobs)) {
|
|
TAILQ_REMOVE(&aio_freejobs, aiocbe, list);
|
|
} else {
|
|
aiocbe = malloc (sizeof *aiocbe, M_AIO, M_WAITOK);
|
|
}
|
|
|
|
error = copyin((caddr_t)job,
|
|
(caddr_t) &aiocbe->uaiocb, sizeof aiocbe->uaiocb);
|
|
if (error) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: Copyin error: %d\n", error);
|
|
#endif
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Get the opcode
|
|
*/
|
|
if (type != LIO_NOP) {
|
|
aiocbe->uaiocb.aio_lio_opcode = type;
|
|
}
|
|
opcode = aiocbe->uaiocb.aio_lio_opcode;
|
|
|
|
/*
|
|
* Get the fd info for process
|
|
*/
|
|
fdp = p->p_fd;
|
|
|
|
/*
|
|
* Range check file descriptor
|
|
*/
|
|
fd = aiocbe->uaiocb.aio_fildes;
|
|
if (fd >= fdp->fd_nfiles) {
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
if (type == 0) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: Null type\n");
|
|
#endif
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, EBADF);
|
|
}
|
|
return EBADF;
|
|
}
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 3)
|
|
printf("aio_aqueue: fd: %d, cmd: %d, buf: %d, cnt: %d, fileoffset: %d\n",
|
|
aiocbe->uaiocb.aio_fildes,
|
|
aiocbe->uaiocb.aio_lio_opcode,
|
|
(int) aiocbe->uaiocb.aio_buf & 0xffffffff,
|
|
aiocbe->uaiocb.aio_nbytes,
|
|
(int) aiocbe->uaiocb.aio_offset & 0xffffffff);
|
|
#endif
|
|
|
|
|
|
fp = fdp->fd_ofiles[fd];
|
|
if ((fp == NULL) ||
|
|
((opcode == LIO_WRITE) && ((fp->f_flag & FWRITE) == 0))) {
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
if (type == 0) {
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, EBADF);
|
|
}
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: Bad file descriptor\n");
|
|
#endif
|
|
return EBADF;
|
|
}
|
|
|
|
if (aiocbe->uaiocb.aio_offset == -1LL) {
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
if (type == 0) {
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, EINVAL);
|
|
}
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: bad offset\n");
|
|
#endif
|
|
return EINVAL;
|
|
}
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf("job addr: 0x%x, 0x%x, %d\n", job, &job->_aiocb_private.kernelinfo, jobrefid);
|
|
#endif
|
|
|
|
error = suword(&job->_aiocb_private.kernelinfo, jobrefid);
|
|
if (error) {
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
if (type == 0) {
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, EINVAL);
|
|
}
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: fetch of kernelinfo from user space\n");
|
|
#endif
|
|
return error;
|
|
}
|
|
|
|
aiocbe->uaiocb._aiocb_private.kernelinfo = (void *)jobrefid;
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf("aio_aqueue: New job: %d... ", jobrefid);
|
|
#endif
|
|
++jobrefid;
|
|
|
|
if (opcode == LIO_NOP) {
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
if (type == 0) {
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if ((opcode != LIO_NOP) &&
|
|
(opcode != LIO_READ) && (opcode != LIO_WRITE)) {
|
|
TAILQ_INSERT_HEAD(&aio_freejobs, aiocbe, list);
|
|
if (type == 0) {
|
|
suword(&job->_aiocb_private.status, -1);
|
|
suword(&job->_aiocb_private.error, EINVAL);
|
|
}
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: invalid LIO op: %d\n", opcode);
|
|
#endif
|
|
return EINVAL;
|
|
}
|
|
|
|
suword(&job->_aiocb_private.error, 0);
|
|
suword(&job->_aiocb_private.status, 0);
|
|
aiocbe->userproc = p;
|
|
aiocbe->jobflags = 0;
|
|
ki = p->p_aioinfo;
|
|
++num_queue_count;
|
|
++ki->kaio_queue_count;
|
|
|
|
retryproc:
|
|
if (aiop = TAILQ_FIRST(&aio_freeproc)) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("found a free AIO process\n");
|
|
#endif
|
|
TAILQ_REMOVE(&aio_freeproc, aiop, list);
|
|
TAILQ_INSERT_TAIL(&aio_activeproc, aiop, list);
|
|
aiop->aioprocflags &= ~AIOP_FREE;
|
|
TAILQ_INSERT_TAIL(&aiop->jobtorun, aiocbe, list);
|
|
TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist);
|
|
aiocbe->jobstate = JOBST_JOBQPROC;
|
|
|
|
aiocbe->jobaioproc = aiop;
|
|
wakeup(aiop->aioproc);
|
|
} else if ((num_aio_procs < max_aio_procs) &&
|
|
(ki->kaio_active_count < ki->kaio_maxactive_count)) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 1) {
|
|
printf("aio_aqueue: starting new proc: num_aio_procs(%d), max_aio_procs(%d)\n", num_aio_procs, max_aio_procs);
|
|
printf(" ki->kaio_active_count(%d), ki->kaio_maxactive_count(%d)\n", ki->kaio_active_count, ki->kaio_maxactive_count);
|
|
}
|
|
#endif
|
|
if (error = aio_newproc()) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_aqueue: problem sleeping for starting proc: %d\n",
|
|
error);
|
|
#endif
|
|
}
|
|
goto retryproc;
|
|
} else {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("queuing to global queue\n");
|
|
#endif
|
|
TAILQ_INSERT_TAIL(&aio_jobs, aiocbe, list);
|
|
TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, aiocbe, plist);
|
|
aiocbe->jobstate = JOBST_JOBQGLOBAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
aio_aqueue(struct proc *p, struct aiocb *job, int type) {
|
|
struct kaioinfo *ki;
|
|
|
|
if (p->p_aioinfo == NULL) {
|
|
aio_init_aioinfo(p);
|
|
}
|
|
|
|
if (num_queue_count >= max_queue_count)
|
|
return EAGAIN;
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki->kaio_queue_count >= ki->kaio_qallowed_count)
|
|
return EAGAIN;
|
|
|
|
return _aio_aqueue(p, job, type);
|
|
}
|
|
|
|
/*
|
|
* Support the aio_return system call
|
|
*/
|
|
int
|
|
aio_return(struct proc *p, struct aio_return_args *uap, int *retval) {
|
|
int jobref, status;
|
|
struct aiocblist *cb;
|
|
struct kaioinfo *ki;
|
|
struct proc *userp;
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL) {
|
|
return EINVAL;
|
|
}
|
|
|
|
jobref = fuword(&uap->aiocbp->_aiocb_private.kernelinfo);
|
|
if (jobref == -1)
|
|
return EINVAL;
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("aio_return: jobref: %d\n", jobref);
|
|
#endif
|
|
|
|
|
|
for (cb = TAILQ_FIRST(&ki->kaio_jobdone);
|
|
cb;
|
|
cb = TAILQ_NEXT(cb, plist)) {
|
|
if (((int) cb->uaiocb._aiocb_private.kernelinfo) == jobref) {
|
|
retval[0] = cb->uaiocb._aiocb_private.status;
|
|
aio_free_entry(cb);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
status = fuword(&uap->aiocbp->_aiocb_private.status);
|
|
if (status == -1)
|
|
return 0;
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Rundown the jobs for a given process.
|
|
*/
|
|
void
|
|
aio_marksuspend(struct proc *p, int njobs, int *joblist, int set) {
|
|
struct aiocblist *aiocbe;
|
|
struct kaioinfo *ki;
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL)
|
|
return;
|
|
|
|
for (aiocbe = TAILQ_FIRST(&ki->kaio_jobqueue);
|
|
aiocbe;
|
|
aiocbe = TAILQ_NEXT(aiocbe, plist)) {
|
|
|
|
if (njobs) {
|
|
|
|
int i;
|
|
|
|
for(i = 0; i < njobs; i++) {
|
|
if (((int) aiocbe->uaiocb._aiocb_private.kernelinfo) == joblist[i])
|
|
break;
|
|
}
|
|
|
|
if (i == njobs)
|
|
continue;
|
|
}
|
|
|
|
if (set)
|
|
aiocbe->jobflags |= AIOCBLIST_SUSPEND;
|
|
else
|
|
aiocbe->jobflags &= ~AIOCBLIST_SUSPEND;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Allow a process to wakeup when any of the I/O requests are
|
|
* completed.
|
|
*/
|
|
int
|
|
aio_suspend(struct proc *p, struct aio_suspend_args *uap, int *retval) {
|
|
struct timeval atv, utv;
|
|
struct timespec ts;
|
|
struct aiocb *const *cbptr, *cbp;
|
|
struct kaioinfo *ki;
|
|
struct aiocblist *cb;
|
|
int i;
|
|
int error, s, timo;
|
|
int *joblist;
|
|
|
|
|
|
timo = 0;
|
|
if (uap->timeout) {
|
|
/*
|
|
* Get timespec struct
|
|
*/
|
|
if (error = copyin((caddr_t) uap->timeout, (caddr_t) &ts, sizeof ts)) {
|
|
return error;
|
|
}
|
|
|
|
if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
|
|
return (EINVAL);
|
|
|
|
TIMESPEC_TO_TIMEVAL(&atv, &ts)
|
|
if (itimerfix(&atv))
|
|
return (EINVAL);
|
|
/*
|
|
* XXX this is not as careful as settimeofday() about minimising
|
|
* interrupt latency. The hzto() interface is inconvenient as usual.
|
|
*/
|
|
s = splclock();
|
|
timevaladd(&atv, &time);
|
|
timo = hzto(&atv);
|
|
splx(s);
|
|
if (timo == 0)
|
|
timo = 1;
|
|
}
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL)
|
|
return EAGAIN;
|
|
|
|
joblist = malloc(uap->nent * sizeof(int), M_TEMP, M_WAITOK);
|
|
cbptr = uap->aiocbp;
|
|
|
|
for(i=0;i<uap->nent;i++) {
|
|
cbp = (struct aiocb *) fuword((caddr_t) &cbptr[i]);
|
|
#if DEBUGAIO > 1
|
|
if (debugaio > 2)
|
|
printf("cbp: %x\n", cbp);
|
|
#endif
|
|
joblist[i] = fuword(&cbp->_aiocb_private.kernelinfo);
|
|
cbptr++;
|
|
}
|
|
|
|
|
|
while (1) {
|
|
for (cb = TAILQ_FIRST(&ki->kaio_jobdone);
|
|
cb;
|
|
cb = TAILQ_NEXT(cb, plist)) {
|
|
for(i=0;i<uap->nent;i++) {
|
|
if (((int) cb->uaiocb._aiocb_private.kernelinfo) == joblist[i]) {
|
|
free(joblist, M_TEMP);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0) {
|
|
printf("Suspend, timeout: %d clocks, jobs:", timo);
|
|
for(i=0;i<uap->nent;i++)
|
|
printf(" %d", joblist[i]);
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
|
|
aio_marksuspend(p, uap->nent, joblist, 1);
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2) {
|
|
printf("Suspending -- waiting for all I/O's to complete: ");
|
|
for(i=0;i<uap->nent;i++)
|
|
printf(" %d", joblist[i]);
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
error = tsleep(p, PRIBIO|PCATCH, "aiospn", timo);
|
|
aio_marksuspend(p, uap->nent, joblist, 0);
|
|
|
|
if (error == EINTR) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf(" signal\n");
|
|
#endif
|
|
free(joblist, M_TEMP);
|
|
return EINTR;
|
|
} else if (error == EWOULDBLOCK) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf(" timeout\n");
|
|
#endif
|
|
free(joblist, M_TEMP);
|
|
return EAGAIN;
|
|
}
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 2)
|
|
printf("\n");
|
|
#endif
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* aio_cancel at the kernel level is a NOOP right now. It
|
|
* might be possible to support it partially in user mode, or
|
|
* in kernel mode later on.
|
|
*/
|
|
int
|
|
aio_cancel(struct proc *p, struct aio_cancel_args *uap, int *retval) {
|
|
return AIO_NOTCANCELLED;
|
|
}
|
|
|
|
/*
|
|
* 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 proc *p, struct aio_error_args *uap, int *retval) {
|
|
int activeflag, errorcode;
|
|
struct aiocblist *cb;
|
|
struct kaioinfo *ki;
|
|
int jobref;
|
|
int error, status;
|
|
|
|
ki = p->p_aioinfo;
|
|
if (ki == NULL)
|
|
return EINVAL;
|
|
|
|
jobref = fuword(&uap->aiocbp->_aiocb_private.kernelinfo);
|
|
if (jobref == -1)
|
|
return EFAULT;
|
|
|
|
for (cb = TAILQ_FIRST(&ki->kaio_jobdone);
|
|
cb;
|
|
cb = TAILQ_NEXT(cb, plist)) {
|
|
|
|
if (((int) cb->uaiocb._aiocb_private.kernelinfo) == jobref) {
|
|
retval[0] = cb->uaiocb._aiocb_private.error;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
for (cb = TAILQ_FIRST(&ki->kaio_jobqueue);
|
|
cb;
|
|
cb = TAILQ_NEXT(cb, plist)) {
|
|
|
|
if (((int) cb->uaiocb._aiocb_private.kernelinfo) == jobref) {
|
|
retval[0] = EINPROGRESS;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Hack for lio
|
|
*/
|
|
status = fuword(&uap->aiocbp->_aiocb_private.status);
|
|
if (status == -1) {
|
|
return fuword(&uap->aiocbp->_aiocb_private.error);
|
|
}
|
|
return EINVAL;
|
|
}
|
|
|
|
int
|
|
aio_read(struct proc *p, struct aio_read_args *uap, int *retval) {
|
|
struct filedesc *fdp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
unsigned int fd;
|
|
int cnt;
|
|
struct aiocb iocb;
|
|
int error, pmodes;
|
|
|
|
pmodes = fuword(&uap->aiocbp->_aiocb_private.privatemodes);
|
|
if ((pmodes & AIO_PMODE_SYNC) == 0) {
|
|
#if DEBUGAIO > 1
|
|
if (debugaio > 2)
|
|
printf("queueing aio_read\n");
|
|
#endif
|
|
return aio_aqueue(p, (struct aiocb *) uap->aiocbp, LIO_READ);
|
|
}
|
|
|
|
/*
|
|
* Get control block
|
|
*/
|
|
if (error = copyin((caddr_t) uap->aiocbp, (caddr_t) &iocb, sizeof iocb))
|
|
return error;
|
|
|
|
/*
|
|
* Get the fd info for process
|
|
*/
|
|
fdp = p->p_fd;
|
|
|
|
/*
|
|
* Range check file descriptor
|
|
*/
|
|
fd = iocb.aio_fildes;
|
|
if (fd >= fdp->fd_nfiles)
|
|
return EBADF;
|
|
fp = fdp->fd_ofiles[fd];
|
|
if ((fp == NULL) || ((fp->f_flag & FREAD) == 0))
|
|
return EBADF;
|
|
if (iocb.aio_offset == -1LL)
|
|
return EINVAL;
|
|
|
|
auio.uio_resid = iocb.aio_nbytes;
|
|
if (auio.uio_resid < 0)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Process sync simply -- queue async request.
|
|
*/
|
|
if ((iocb._aiocb_private.privatemodes & AIO_PMODE_SYNC) == 0) {
|
|
return aio_aqueue(p, (struct aiocb *) uap->aiocbp, LIO_READ);
|
|
}
|
|
|
|
aiov.iov_base = iocb.aio_buf;
|
|
aiov.iov_len = iocb.aio_nbytes;
|
|
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = iocb.aio_offset;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
|
|
cnt = iocb.aio_nbytes;
|
|
error = (*fp->f_ops->fo_read)(fp, &auio, fp->f_cred);
|
|
if (error &&
|
|
(auio.uio_resid != cnt) &&
|
|
(error == ERESTART || error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
cnt -= auio.uio_resid;
|
|
*retval = cnt;
|
|
return error;
|
|
}
|
|
|
|
int
|
|
aio_write(struct proc *p, struct aio_write_args *uap, int *retval) {
|
|
struct filedesc *fdp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
unsigned int fd;
|
|
int cnt;
|
|
struct aiocb iocb;
|
|
int error;
|
|
int pmodes;
|
|
|
|
/*
|
|
* Process sync simply -- queue async request.
|
|
*/
|
|
pmodes = fuword(&uap->aiocbp->_aiocb_private.privatemodes);
|
|
if ((pmodes & AIO_PMODE_SYNC) == 0) {
|
|
#if DEBUGAIO > 1
|
|
if (debugaio > 2)
|
|
printf("queing aio_write\n");
|
|
#endif
|
|
return aio_aqueue(p, (struct aiocb *) uap->aiocbp, LIO_WRITE);
|
|
}
|
|
|
|
if (error = copyin((caddr_t) uap->aiocbp, (caddr_t) &iocb, sizeof iocb))
|
|
return error;
|
|
|
|
/*
|
|
* Get the fd info for process
|
|
*/
|
|
fdp = p->p_fd;
|
|
|
|
/*
|
|
* Range check file descriptor
|
|
*/
|
|
fd = iocb.aio_fildes;
|
|
if (fd >= fdp->fd_nfiles)
|
|
return EBADF;
|
|
fp = fdp->fd_ofiles[fd];
|
|
if ((fp == NULL) || ((fp->f_flag & FWRITE) == 0))
|
|
return EBADF;
|
|
if (iocb.aio_offset == -1LL)
|
|
return EINVAL;
|
|
|
|
aiov.iov_base = iocb.aio_buf;
|
|
aiov.iov_len = iocb.aio_nbytes;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = iocb.aio_offset;
|
|
|
|
auio.uio_resid = iocb.aio_nbytes;
|
|
if (auio.uio_resid < 0)
|
|
return (EINVAL);
|
|
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
|
|
cnt = iocb.aio_nbytes;
|
|
error = (*fp->f_ops->fo_write)(fp, &auio, fp->f_cred);
|
|
if (error) {
|
|
if (auio.uio_resid != cnt) {
|
|
if (error == ERESTART || error == EINTR || error == EWOULDBLOCK)
|
|
error = 0;
|
|
if (error == EPIPE)
|
|
psignal(p, SIGPIPE);
|
|
}
|
|
}
|
|
cnt -= auio.uio_resid;
|
|
*retval = cnt;
|
|
return error;
|
|
}
|
|
|
|
int
|
|
lio_listio(struct proc *p, struct lio_listio_args *uap, int *retval) {
|
|
int cnt, nent, nentqueued;
|
|
struct aiocb *iocb, * const *cbptr;
|
|
struct aiocblist *cb;
|
|
struct kaioinfo *ki;
|
|
int error, runningcode;
|
|
int i;
|
|
|
|
if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT)) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("lio_listio: bad mode: %d\n", uap->mode);
|
|
#endif
|
|
return EINVAL;
|
|
}
|
|
|
|
nent = uap->nent;
|
|
if (nent > AIO_LISTIO_MAX) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("lio_listio: nent > AIO_LISTIO_MAX: %d > %d\n", nent, AIO_LISTIO_MAX);
|
|
#endif
|
|
return EINVAL;
|
|
}
|
|
|
|
if (p->p_aioinfo == NULL) {
|
|
aio_init_aioinfo(p);
|
|
}
|
|
|
|
if ((nent + num_queue_count) > max_queue_count) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("lio_listio: (nent(%d) + num_queue_count(%d)) > max_queue_count(%d)\n", nent, num_queue_count, max_queue_count);
|
|
#endif
|
|
return EAGAIN;
|
|
}
|
|
|
|
ki = p->p_aioinfo;
|
|
if ((nent + ki->kaio_queue_count) > ki->kaio_qallowed_count) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("lio_listio: (nent(%d) + ki->kaio_queue_count(%d)) > ki->kaio_qallowed_count(%d)\n", nent, ki->kaio_queue_count, ki->kaio_qallowed_count);
|
|
#endif
|
|
return EAGAIN;
|
|
}
|
|
|
|
/*
|
|
num_queue_count += nent;
|
|
ki->kaio_queue_count += nent;
|
|
*/
|
|
nentqueued = 0;
|
|
|
|
/*
|
|
* get pointers to the list of I/O requests
|
|
iocbvec = malloc(uap->nent * sizeof(struct aiocb *), M_TEMP, M_WAITOK);
|
|
*/
|
|
|
|
cbptr = uap->acb_list;
|
|
for(i = 0; i < uap->nent; i++) {
|
|
iocb = (struct aiocb *) fuword((caddr_t) &cbptr[i]);
|
|
error = _aio_aqueue(p, iocb, 0);
|
|
if (error == 0)
|
|
nentqueued++;
|
|
}
|
|
|
|
/*
|
|
* If we haven't queued any, then just return error
|
|
*/
|
|
if (nentqueued == 0) {
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("lio_listio: none queued\n");
|
|
#endif
|
|
return EIO;
|
|
}
|
|
|
|
#if DEBUGAIO > 0
|
|
if (debugaio > 0)
|
|
printf("lio_listio: %d queued\n", nentqueued);
|
|
#endif
|
|
|
|
/*
|
|
* Calculate the appropriate error return
|
|
*/
|
|
runningcode = 0;
|
|
if (nentqueued != nent)
|
|
runningcode = EIO;
|
|
|
|
if (uap->mode == LIO_WAIT) {
|
|
while (1) {
|
|
for(i = 0; i < uap->nent; i++) {
|
|
int found;
|
|
int jobref, command, status;
|
|
|
|
/*
|
|
* Fetch address of the control buf pointer in user space
|
|
*/
|
|
iocb = (struct aiocb *) fuword((caddr_t) &cbptr[i]);
|
|
|
|
/*
|
|
* Fetch the associated command from user space
|
|
*/
|
|
command = fuword(&iocb->aio_lio_opcode);
|
|
if (command == LIO_NOP)
|
|
continue;
|
|
|
|
/*
|
|
* If the status shows error or complete, then skip this entry.
|
|
*/
|
|
status = fuword(&iocb->_aiocb_private.status);
|
|
if (status != 0)
|
|
continue;
|
|
|
|
jobref = fuword(&iocb->_aiocb_private.kernelinfo);
|
|
|
|
found = 0;
|
|
for (cb = TAILQ_FIRST(&ki->kaio_jobdone);
|
|
cb;
|
|
cb = TAILQ_NEXT(cb, plist)) {
|
|
if (((int) cb->uaiocb._aiocb_private.kernelinfo) == jobref) {
|
|
found++;
|
|
break;
|
|
}
|
|
}
|
|
if (found == 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If all I/Os have been disposed of, then we can return
|
|
*/
|
|
if (i == uap->nent) {
|
|
return runningcode;
|
|
}
|
|
|
|
aio_marksuspend(p, 0, 0, 1);
|
|
error = tsleep(p, PRIBIO|PCATCH, "aiospn", 0);
|
|
aio_marksuspend(p, 0, 0, 0);
|
|
|
|
if (error == EINTR) {
|
|
return EINTR;
|
|
} else if (error == EWOULDBLOCK) {
|
|
return EAGAIN;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
return runningcode;
|
|
}
|