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-rw-r--r--freebsd/sys/kern/vfs_aio.c2987
1 files changed, 2987 insertions, 0 deletions
diff --git a/freebsd/sys/kern/vfs_aio.c b/freebsd/sys/kern/vfs_aio.c
new file mode 100644
index 00000000..350c51a0
--- /dev/null
+++ b/freebsd/sys/kern/vfs_aio.c
@@ -0,0 +1,2987 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * 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/capsicum.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/syscallsubr.h>
+#include <sys/protosw.h>
+#include <sys/rwlock.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/syslog.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 <geom/geom.h>
+
+#include <machine/atomic.h>
+
+#include <vm/vm.h>
+#include <vm/vm_page.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>
+
+/*
+ * 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;
+
+#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
+#endif
+
+#ifndef MAX_AIO_QUEUE
+#define MAX_AIO_QUEUE 1024 /* Bigger than MAX_AIO_QUEUE_PER_PROC */
+#endif
+
+#ifndef MAX_BUF_AIO
+#define MAX_BUF_AIO 16
+#endif
+
+FEATURE(aio, "Asynchronous I/O");
+SYSCTL_DECL(_p1003_1b);
+
+static MALLOC_DEFINE(M_LIO, "lio", "listio aio control block list");
+static MALLOC_DEFINE(M_AIOS, "aios", "aio_suspend aio control block list");
+
+static SYSCTL_NODE(_vfs, OID_AUTO, aio, CTLFLAG_RW, 0,
+ "Async IO management");
+
+static int enable_aio_unsafe = 0;
+SYSCTL_INT(_vfs_aio, OID_AUTO, enable_unsafe, CTLFLAG_RW, &enable_aio_unsafe, 0,
+ "Permit asynchronous IO on all file types, not just known-safe types");
+
+static unsigned int unsafe_warningcnt = 1;
+SYSCTL_UINT(_vfs_aio, OID_AUTO, unsafe_warningcnt, CTLFLAG_RW,
+ &unsafe_warningcnt, 0,
+ "Warnings that will be triggered upon failed IO requests on unsafe files");
+
+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 processes 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 processes 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 processes 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");
+
+static int num_unmapped_aio = 0;
+SYSCTL_INT(_vfs_aio, OID_AUTO, num_unmapped_aio, CTLFLAG_RD, &num_unmapped_aio,
+ 0,
+ "Number of aio requests presently handled by unmapped I/O buffers");
+
+/* Number of async I/O processes in the process of being started */
+/* XXX This should be local to aio_aqueue() */
+static int num_aio_resv_start = 0;
+
+static int aiod_lifetime;
+SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_lifetime, CTLFLAG_RW, &aiod_lifetime, 0,
+ "Maximum lifetime for idle aiod");
+
+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");
+
+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");
+
+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");
+
+/*
+ * Though redundant with vfs.aio.max_aio_queue_per_proc, POSIX requires
+ * sysconf(3) to support AIO_LISTIO_MAX, and we implement that with
+ * vfs.aio.aio_listio_max.
+ */
+SYSCTL_INT(_p1003_1b, CTL_P1003_1B_AIO_LISTIO_MAX, aio_listio_max,
+ CTLFLAG_RD | CTLFLAG_CAPRD, &max_aio_queue_per_proc,
+ 0, "Maximum aio requests for a single lio_listio call");
+
+#ifdef COMPAT_FREEBSD6
+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;
+#endif
+
+/*
+ * Below is a key of locks used to protect each member of struct kaiocb
+ * 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.
+ */
+
+/*
+ * If the routine that services an AIO request blocks while running in an
+ * AIO kernel process it can starve other I/O requests. BIO requests
+ * queued via aio_qbio() complete asynchronously and do not use AIO kernel
+ * processes at all. Socket I/O requests use a separate pool of
+ * kprocs and also force non-blocking I/O. Other file I/O requests
+ * use the generic fo_read/fo_write operations which can block. The
+ * fsync and mlock operations can also block while executing. Ideally
+ * none of these requests would block while executing.
+ *
+ * Note that the service routines cannot toggle O_NONBLOCK in the file
+ * structure directly while handling a request due to races with
+ * userland threads.
+ */
+
+/* jobflags */
+#define KAIOCB_QUEUEING 0x01
+#define KAIOCB_CANCELLED 0x02
+#define KAIOCB_CANCELLING 0x04
+#define KAIOCB_CHECKSYNC 0x08
+#define KAIOCB_CLEARED 0x10
+#define KAIOCB_FINISHED 0x20
+
+/*
+ * AIO process info
+ */
+#define AIOP_FREE 0x1 /* proc on free queue */
+
+struct aioproc {
+ int aioprocflags; /* (c) AIO proc flags */
+ TAILQ_ENTRY(aioproc) list; /* (c) list of processes */
+ struct proc *aioproc; /* (*) the AIO proc */
+};
+
+/*
+ * 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_active_count; /* (c) number of currently used AIOs */
+ int kaio_count; /* (a) size of AIO queue */
+ int kaio_buffer_count; /* (a) number of bio buffers */
+ TAILQ_HEAD(,kaiocb) kaio_all; /* (a) all AIOs in a process */
+ TAILQ_HEAD(,kaiocb) kaio_done; /* (a) done queue for process */
+ TAILQ_HEAD(,aioliojob) kaio_liojoblist; /* (a) list of lio jobs */
+ TAILQ_HEAD(,kaiocb) kaio_jobqueue; /* (a) job queue for process */
+ TAILQ_HEAD(,kaiocb) kaio_syncqueue; /* (a) queue for aio_fsync */
+ TAILQ_HEAD(,kaiocb) kaio_syncready; /* (a) second q for aio_fsync */
+ struct task kaio_task; /* (*) task to kick aio processes */
+ struct task kaio_sync_task; /* (*) task to schedule fsync jobs */
+};
+
+#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 AIO completes */
+
+/*
+ * Operations used to interact with userland aio control blocks.
+ * Different ABIs provide their own operations.
+ */
+struct aiocb_ops {
+ int (*copyin)(struct aiocb *ujob, struct aiocb *kjob);
+ long (*fetch_status)(struct aiocb *ujob);
+ long (*fetch_error)(struct aiocb *ujob);
+ int (*store_status)(struct aiocb *ujob, long status);
+ int (*store_error)(struct aiocb *ujob, long error);
+ int (*store_kernelinfo)(struct aiocb *ujob, long jobref);
+ int (*store_aiocb)(struct aiocb **ujobp, struct aiocb *ujob);
+};
+
+static TAILQ_HEAD(,aioproc) aio_freeproc; /* (c) Idle daemons */
+static struct sema aio_newproc_sem;
+static struct mtx aio_job_mtx;
+static TAILQ_HEAD(,kaiocb) aio_jobs; /* (c) Async job list */
+static struct unrhdr *aiod_unr;
+
+void aio_init_aioinfo(struct proc *p);
+static int aio_onceonly(void);
+static int aio_free_entry(struct kaiocb *job);
+static void aio_process_rw(struct kaiocb *job);
+static void aio_process_sync(struct kaiocb *job);
+static void aio_process_mlock(struct kaiocb *job);
+static void aio_schedule_fsync(void *context, int pending);
+static int aio_newproc(int *);
+int aio_aqueue(struct thread *td, struct aiocb *ujob,
+ struct aioliojob *lio, int type, struct aiocb_ops *ops);
+static int aio_queue_file(struct file *fp, struct kaiocb *job);
+static void aio_biowakeup(struct bio *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_qbio(struct proc *p, struct kaiocb *job);
+static void aio_daemon(void *param);
+static void aio_bio_done_notify(struct proc *userp, struct kaiocb *job);
+static bool aio_clear_cancel_function_locked(struct kaiocb *job);
+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 process data
+ * aiocb async io jobs
+ * aiolio list io jobs
+ */
+static uma_zone_t kaio_zone, aiop_zone, aiocb_zone, aiolio_zone;
+
+/* kqueue filters for aio */
+static struct filterops aio_filtops = {
+ .f_isfd = 0,
+ .f_attach = filt_aioattach,
+ .f_detach = filt_aiodetach,
+ .f_event = filt_aio,
+};
+static struct filterops lio_filtops = {
+ .f_isfd = 0,
+ .f_attach = filt_lioattach,
+ .f_detach = filt_liodetach,
+ .f_event = filt_lio
+};
+
+static eventhandler_tag exit_tag, exec_tag;
+
+TASKQUEUE_DEFINE_THREAD(aiod_kick);
+
+/*
+ * 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_SHUTDOWN:
+ break;
+ default:
+ error = EOPNOTSUPP;
+ break;
+ }
+ return (error);
+}
+
+static moduledata_t aio_mod = {
+ "aio",
+ &aio_modload,
+ NULL
+};
+
+DECLARE_MODULE(aio, aio_mod, SI_SUB_VFS, SI_ORDER_ANY);
+MODULE_VERSION(aio, 1);
+
+/*
+ * Startup initialization
+ */
+static int
+aio_onceonly(void)
+{
+
+ 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);
+ 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 aioproc), NULL,
+ NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
+ aiocb_zone = uma_zcreate("AIOCB", sizeof(struct kaiocb), 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_lifetime = AIOD_LIFETIME_DEFAULT;
+ jobrefid = 1;
+ p31b_setcfg(CTL_P1003_1B_ASYNCHRONOUS_IO, _POSIX_ASYNCHRONOUS_IO);
+ p31b_setcfg(CTL_P1003_1B_AIO_MAX, MAX_AIO_QUEUE);
+ p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, 0);
+
+ 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 | MTX_NEW);
+ ki->kaio_flags = 0;
+ ki->kaio_active_count = 0;
+ ki->kaio_count = 0;
+ ki->kaio_buffer_count = 0;
+ TAILQ_INIT(&ki->kaio_all);
+ TAILQ_INIT(&ki->kaio_done);
+ TAILQ_INIT(&ki->kaio_jobqueue);
+ TAILQ_INIT(&ki->kaio_liojoblist);
+ TAILQ_INIT(&ki->kaio_syncqueue);
+ TAILQ_INIT(&ki->kaio_syncready);
+ TASK_INIT(&ki->kaio_task, 0, aio_kick_helper, p);
+ TASK_INIT(&ki->kaio_sync_task, 0, aio_schedule_fsync, ki);
+ PROC_LOCK(p);
+ if (p->p_aioinfo == NULL) {
+ p->p_aioinfo = ki;
+ PROC_UNLOCK(p);
+ } else {
+ PROC_UNLOCK(p);
+ mtx_destroy(&ki->kaio_mtx);
+ uma_zfree(kaio_zone, ki);
+ }
+
+ while (num_aio_procs < MIN(target_aio_procs, max_aio_procs))
+ aio_newproc(NULL);
+}
+
+static int
+aio_sendsig(struct proc *p, struct sigevent *sigev, ksiginfo_t *ksi)
+{
+ struct thread *td;
+ int error;
+
+ error = sigev_findtd(p, sigev, &td);
+ if (error)
+ return (error);
+ if (!KSI_ONQ(ksi)) {
+ ksiginfo_set_sigev(ksi, sigev);
+ ksi->ksi_code = SI_ASYNCIO;
+ ksi->ksi_flags |= KSI_EXT | KSI_INS;
+ tdsendsignal(p, td, ksi->ksi_signo, ksi);
+ }
+ PROC_UNLOCK(p);
+ return (error);
+}
+
+/*
+ * Free a job entry. Wait for completion if it is currently active, but don't
+ * delay forever. If we delay, we return a flag that says that we have to
+ * restart the queue scan.
+ */
+static int
+aio_free_entry(struct kaiocb *job)
+{
+ struct kaioinfo *ki;
+ struct aioliojob *lj;
+ struct proc *p;
+
+ p = job->userproc;
+ MPASS(curproc == p);
+ ki = p->p_aioinfo;
+ MPASS(ki != NULL);
+
+ AIO_LOCK_ASSERT(ki, MA_OWNED);
+ MPASS(job->jobflags & KAIOCB_FINISHED);
+
+ atomic_subtract_int(&num_queue_count, 1);
+
+ ki->kaio_count--;
+ MPASS(ki->kaio_count >= 0);
+
+ TAILQ_REMOVE(&ki->kaio_done, job, plist);
+ TAILQ_REMOVE(&ki->kaio_all, job, allist);
+
+ lj = job->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);
+ }
+ }
+
+ /* job is going away, we need to destroy any knotes */
+ knlist_delete(&job->klist, curthread, 1);
+ PROC_LOCK(p);
+ sigqueue_take(&job->ksi);
+ PROC_UNLOCK(p);
+
+ 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
+ * a kaiocb 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.
+ */
+ if (job->fd_file)
+ fdrop(job->fd_file, curthread);
+ crfree(job->cred);
+ uma_zfree(aiocb_zone, job);
+ 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);
+}
+
+static int
+aio_cancel_job(struct proc *p, struct kaioinfo *ki, struct kaiocb *job)
+{
+ aio_cancel_fn_t *func;
+ int cancelled;
+
+ AIO_LOCK_ASSERT(ki, MA_OWNED);
+ if (job->jobflags & (KAIOCB_CANCELLED | KAIOCB_FINISHED))
+ return (0);
+ MPASS((job->jobflags & KAIOCB_CANCELLING) == 0);
+ job->jobflags |= KAIOCB_CANCELLED;
+
+ func = job->cancel_fn;
+
+ /*
+ * If there is no cancel routine, just leave the job marked as
+ * cancelled. The job should be in active use by a caller who
+ * should complete it normally or when it fails to install a
+ * cancel routine.
+ */
+ if (func == NULL)
+ return (0);
+
+ /*
+ * Set the CANCELLING flag so that aio_complete() will defer
+ * completions of this job. This prevents the job from being
+ * freed out from under the cancel callback. After the
+ * callback any deferred completion (whether from the callback
+ * or any other source) will be completed.
+ */
+ job->jobflags |= KAIOCB_CANCELLING;
+ AIO_UNLOCK(ki);
+ func(job);
+ AIO_LOCK(ki);
+ job->jobflags &= ~KAIOCB_CANCELLING;
+ if (job->jobflags & KAIOCB_FINISHED) {
+ cancelled = job->uaiocb._aiocb_private.error == ECANCELED;
+ TAILQ_REMOVE(&ki->kaio_jobqueue, job, plist);
+ aio_bio_done_notify(p, job);
+ } else {
+ /*
+ * The cancel callback might have scheduled an
+ * operation to cancel this request, but it is
+ * only counted as cancelled if the request is
+ * cancelled when the callback returns.
+ */
+ cancelled = 0;
+ }
+ return (cancelled);
+}
+
+/*
+ * Rundown the jobs for a given process.
+ */
+static void
+aio_proc_rundown(void *arg, struct proc *p)
+{
+ struct kaioinfo *ki;
+ struct aioliojob *lj;
+ struct kaiocb *job, *jobn;
+
+ 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(job, &ki->kaio_jobqueue, plist, jobn) {
+ aio_cancel_job(p, ki, job);
+ }
+
+ /* Wait for all running I/O to be finished */
+ if (TAILQ_FIRST(&ki->kaio_jobqueue) || ki->kaio_active_count != 0) {
+ ki->kaio_flags |= KAIO_WAKEUP;
+ msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO, "aioprn", hz);
+ goto restart;
+ }
+
+ /* Free all completed I/O requests. */
+ while ((job = TAILQ_FIRST(&ki->kaio_done)) != NULL)
+ aio_free_entry(job);
+
+ 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_kick, &ki->kaio_task);
+ taskqueue_drain(taskqueue_aiod_kick, &ki->kaio_sync_task);
+ mtx_destroy(&ki->kaio_mtx);
+ uma_zfree(kaio_zone, ki);
+ p->p_aioinfo = NULL;
+}
+
+/*
+ * Select a job to run (called by an AIO daemon).
+ */
+static struct kaiocb *
+aio_selectjob(struct aioproc *aiop)
+{
+ struct kaiocb *job;
+ struct kaioinfo *ki;
+ struct proc *userp;
+
+ mtx_assert(&aio_job_mtx, MA_OWNED);
+restart:
+ TAILQ_FOREACH(job, &aio_jobs, list) {
+ userp = job->userproc;
+ ki = userp->p_aioinfo;
+
+ if (ki->kaio_active_count < max_aio_per_proc) {
+ TAILQ_REMOVE(&aio_jobs, job, list);
+ if (!aio_clear_cancel_function(job))
+ goto restart;
+
+ /* Account for currently active jobs. */
+ ki->kaio_active_count++;
+ break;
+ }
+ }
+ return (job);
+}
+
+/*
+ * Move all data to a permanent storage device. This code
+ * simulates the fsync syscall.
+ */
+static int
+aio_fsync_vnode(struct thread *td, struct vnode *vp)
+{
+ struct mount *mp;
+ int error;
+
+ if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0)
+ goto drop;
+ vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+ if (vp->v_object != NULL) {
+ VM_OBJECT_WLOCK(vp->v_object);
+ vm_object_page_clean(vp->v_object, 0, 0, 0);
+ VM_OBJECT_WUNLOCK(vp->v_object);
+ }
+ error = VOP_FSYNC(vp, MNT_WAIT, td);
+
+ VOP_UNLOCK(vp, 0);
+ vn_finished_write(mp);
+drop:
+ return (error);
+}
+
+/*
+ * The AIO processing activity for LIO_READ/LIO_WRITE. This is the code that
+ * does the I/O request for the non-bio 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_rw(struct kaiocb *job)
+{
+ struct ucred *td_savedcred;
+ struct thread *td;
+ struct aiocb *cb;
+ struct file *fp;
+ struct uio auio;
+ struct iovec aiov;
+ ssize_t cnt;
+ long msgsnd_st, msgsnd_end;
+ long msgrcv_st, msgrcv_end;
+ long oublock_st, oublock_end;
+ long inblock_st, inblock_end;
+ int error;
+
+ KASSERT(job->uaiocb.aio_lio_opcode == LIO_READ ||
+ job->uaiocb.aio_lio_opcode == LIO_WRITE,
+ ("%s: opcode %d", __func__, job->uaiocb.aio_lio_opcode));
+
+ aio_switch_vmspace(job);
+ td = curthread;
+ td_savedcred = td->td_ucred;
+ td->td_ucred = job->cred;
+ cb = &job->uaiocb;
+ fp = job->fd_file;
+
+ 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;
+
+ msgrcv_st = td->td_ru.ru_msgrcv;
+ msgsnd_st = td->td_ru.ru_msgsnd;
+ inblock_st = td->td_ru.ru_inblock;
+ oublock_st = td->td_ru.ru_oublock;
+
+ /*
+ * aio_aqueue() acquires a reference to the file that is
+ * released in aio_free_entry().
+ */
+ if (cb->aio_lio_opcode == LIO_READ) {
+ auio.uio_rw = UIO_READ;
+ if (auio.uio_resid == 0)
+ error = 0;
+ else
+ error = fo_read(fp, &auio, fp->f_cred, FOF_OFFSET, td);
+ } else {
+ if (fp->f_type == DTYPE_VNODE)
+ bwillwrite();
+ auio.uio_rw = UIO_WRITE;
+ error = fo_write(fp, &auio, fp->f_cred, FOF_OFFSET, td);
+ }
+ msgrcv_end = td->td_ru.ru_msgrcv;
+ msgsnd_end = td->td_ru.ru_msgsnd;
+ inblock_end = td->td_ru.ru_inblock;
+ oublock_end = td->td_ru.ru_oublock;
+
+ job->msgrcv = msgrcv_end - msgrcv_st;
+ job->msgsnd = msgsnd_end - msgsnd_st;
+ job->inblock = inblock_end - inblock_st;
+ job->outblock = 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)) {
+ PROC_LOCK(job->userproc);
+ kern_psignal(job->userproc, SIGPIPE);
+ PROC_UNLOCK(job->userproc);
+ }
+ }
+
+ cnt -= auio.uio_resid;
+ td->td_ucred = td_savedcred;
+ if (error)
+ aio_complete(job, -1, error);
+ else
+ aio_complete(job, cnt, 0);
+}
+
+static void
+aio_process_sync(struct kaiocb *job)
+{
+ struct thread *td = curthread;
+ struct ucred *td_savedcred = td->td_ucred;
+ struct file *fp = job->fd_file;
+ int error = 0;
+
+ KASSERT(job->uaiocb.aio_lio_opcode == LIO_SYNC,
+ ("%s: opcode %d", __func__, job->uaiocb.aio_lio_opcode));
+
+ td->td_ucred = job->cred;
+ if (fp->f_vnode != NULL)
+ error = aio_fsync_vnode(td, fp->f_vnode);
+ td->td_ucred = td_savedcred;
+ if (error)
+ aio_complete(job, -1, error);
+ else
+ aio_complete(job, 0, 0);
+}
+
+static void
+aio_process_mlock(struct kaiocb *job)
+{
+ struct aiocb *cb = &job->uaiocb;
+ int error;
+
+ KASSERT(job->uaiocb.aio_lio_opcode == LIO_MLOCK,
+ ("%s: opcode %d", __func__, job->uaiocb.aio_lio_opcode));
+
+ aio_switch_vmspace(job);
+ error = kern_mlock(job->userproc, job->cred,
+ __DEVOLATILE(uintptr_t, cb->aio_buf), cb->aio_nbytes);
+ aio_complete(job, error != 0 ? -1 : 0, error);
+}
+
+static void
+aio_bio_done_notify(struct proc *userp, struct kaiocb *job)
+{
+ struct aioliojob *lj;
+ struct kaioinfo *ki;
+ struct kaiocb *sjob, *sjobn;
+ int lj_done;
+ bool schedule_fsync;
+
+ ki = userp->p_aioinfo;
+ AIO_LOCK_ASSERT(ki, MA_OWNED);
+ lj = job->lio;
+ lj_done = 0;
+ if (lj) {
+ lj->lioj_finished_count++;
+ if (lj->lioj_count == lj->lioj_finished_count)
+ lj_done = 1;
+ }
+ TAILQ_INSERT_TAIL(&ki->kaio_done, job, plist);
+ MPASS(job->jobflags & KAIOCB_FINISHED);
+
+ if (ki->kaio_flags & KAIO_RUNDOWN)
+ goto notification_done;
+
+ if (job->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL ||
+ job->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID)
+ aio_sendsig(userp, &job->uaiocb.aio_sigevent, &job->ksi);
+
+ KNOTE_LOCKED(&job->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 (job->jobflags & KAIOCB_CHECKSYNC) {
+ schedule_fsync = false;
+ TAILQ_FOREACH_SAFE(sjob, &ki->kaio_syncqueue, list, sjobn) {
+ if (job->fd_file != sjob->fd_file ||
+ job->seqno >= sjob->seqno)
+ continue;
+ if (--sjob->pending > 0)
+ continue;
+ TAILQ_REMOVE(&ki->kaio_syncqueue, sjob, list);
+ if (!aio_clear_cancel_function_locked(sjob))
+ continue;
+ TAILQ_INSERT_TAIL(&ki->kaio_syncready, sjob, list);
+ schedule_fsync = true;
+ }
+ if (schedule_fsync)
+ taskqueue_enqueue(taskqueue_aiod_kick,
+ &ki->kaio_sync_task);
+ }
+ if (ki->kaio_flags & KAIO_WAKEUP) {
+ ki->kaio_flags &= ~KAIO_WAKEUP;
+ wakeup(&userp->p_aioinfo);
+ }
+}
+
+static void
+aio_schedule_fsync(void *context, int pending)
+{
+ struct kaioinfo *ki;
+ struct kaiocb *job;
+
+ ki = context;
+ AIO_LOCK(ki);
+ while (!TAILQ_EMPTY(&ki->kaio_syncready)) {
+ job = TAILQ_FIRST(&ki->kaio_syncready);
+ TAILQ_REMOVE(&ki->kaio_syncready, job, list);
+ AIO_UNLOCK(ki);
+ aio_schedule(job, aio_process_sync);
+ AIO_LOCK(ki);
+ }
+ AIO_UNLOCK(ki);
+}
+
+bool
+aio_cancel_cleared(struct kaiocb *job)
+{
+
+ /*
+ * The caller should hold the same queue lock held when
+ * aio_clear_cancel_function() was called and set this flag
+ * ensuring this check sees an up-to-date value. However,
+ * there is no way to assert that.
+ */
+ return ((job->jobflags & KAIOCB_CLEARED) != 0);
+}
+
+static bool
+aio_clear_cancel_function_locked(struct kaiocb *job)
+{
+
+ AIO_LOCK_ASSERT(job->userproc->p_aioinfo, MA_OWNED);
+ MPASS(job->cancel_fn != NULL);
+ if (job->jobflags & KAIOCB_CANCELLING) {
+ job->jobflags |= KAIOCB_CLEARED;
+ return (false);
+ }
+ job->cancel_fn = NULL;
+ return (true);
+}
+
+bool
+aio_clear_cancel_function(struct kaiocb *job)
+{
+ struct kaioinfo *ki;
+ bool ret;
+
+ ki = job->userproc->p_aioinfo;
+ AIO_LOCK(ki);
+ ret = aio_clear_cancel_function_locked(job);
+ AIO_UNLOCK(ki);
+ return (ret);
+}
+
+static bool
+aio_set_cancel_function_locked(struct kaiocb *job, aio_cancel_fn_t *func)
+{
+
+ AIO_LOCK_ASSERT(job->userproc->p_aioinfo, MA_OWNED);
+ if (job->jobflags & KAIOCB_CANCELLED)
+ return (false);
+ job->cancel_fn = func;
+ return (true);
+}
+
+bool
+aio_set_cancel_function(struct kaiocb *job, aio_cancel_fn_t *func)
+{
+ struct kaioinfo *ki;
+ bool ret;
+
+ ki = job->userproc->p_aioinfo;
+ AIO_LOCK(ki);
+ ret = aio_set_cancel_function_locked(job, func);
+ AIO_UNLOCK(ki);
+ return (ret);
+}
+
+void
+aio_complete(struct kaiocb *job, long status, int error)
+{
+ struct kaioinfo *ki;
+ struct proc *userp;
+
+ job->uaiocb._aiocb_private.error = error;
+ job->uaiocb._aiocb_private.status = status;
+
+ userp = job->userproc;
+ ki = userp->p_aioinfo;
+
+ AIO_LOCK(ki);
+ KASSERT(!(job->jobflags & KAIOCB_FINISHED),
+ ("duplicate aio_complete"));
+ job->jobflags |= KAIOCB_FINISHED;
+ if ((job->jobflags & (KAIOCB_QUEUEING | KAIOCB_CANCELLING)) == 0) {
+ TAILQ_REMOVE(&ki->kaio_jobqueue, job, plist);
+ aio_bio_done_notify(userp, job);
+ }
+ AIO_UNLOCK(ki);
+}
+
+void
+aio_cancel(struct kaiocb *job)
+{
+
+ aio_complete(job, -1, ECANCELED);
+}
+
+void
+aio_switch_vmspace(struct kaiocb *job)
+{
+
+ vmspace_switch_aio(job->userproc->p_vmspace);
+}
+
+/*
+ * 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 kaiocb *job;
+ struct aioproc *aiop;
+ struct kaioinfo *ki;
+ struct proc *p;
+ struct vmspace *myvm;
+ struct thread *td = curthread;
+ int id = (intptr_t)_id;
+
+ /*
+ * Grab an extra reference on the daemon's vmspace so that it
+ * doesn't get freed by jobs that switch to a different
+ * vmspace.
+ */
+ p = td->td_proc;
+ myvm = vmspace_acquire_ref(p);
+
+ KASSERT(p->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->aioproc = p;
+ aiop->aioprocflags = 0;
+
+ /*
+ * 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 (;;) {
+ /*
+ * Take daemon off of free queue
+ */
+ if (aiop->aioprocflags & AIOP_FREE) {
+ TAILQ_REMOVE(&aio_freeproc, aiop, list);
+ aiop->aioprocflags &= ~AIOP_FREE;
+ }
+
+ /*
+ * Check for jobs.
+ */
+ while ((job = aio_selectjob(aiop)) != NULL) {
+ mtx_unlock(&aio_job_mtx);
+
+ ki = job->userproc->p_aioinfo;
+ job->handle_fn(job);
+
+ mtx_lock(&aio_job_mtx);
+ /* Decrement the active job count. */
+ ki->kaio_active_count--;
+ }
+
+ /*
+ * Disconnect from user address space.
+ */
+ if (p->p_vmspace != myvm) {
+ mtx_unlock(&aio_job_mtx);
+ vmspace_switch_aio(myvm);
+ mtx_lock(&aio_job_mtx);
+ /*
+ * We have to restart to avoid race, we only sleep if
+ * no job can be selected.
+ */
+ continue;
+ }
+
+ mtx_assert(&aio_job_mtx, MA_OWNED);
+
+ TAILQ_INSERT_HEAD(&aio_freeproc, aiop, list);
+ aiop->aioprocflags |= AIOP_FREE;
+
+ /*
+ * If daemon is inactive for a long time, allow it to exit,
+ * thereby freeing resources.
+ */
+ if (msleep(p, &aio_job_mtx, PRIBIO, "aiordy",
+ aiod_lifetime) == EWOULDBLOCK && TAILQ_EMPTY(&aio_jobs) &&
+ (aiop->aioprocflags & AIOP_FREE) &&
+ num_aio_procs > target_aio_procs)
+ break;
+ }
+ TAILQ_REMOVE(&aio_freeproc, aiop, list);
+ num_aio_procs--;
+ mtx_unlock(&aio_job_mtx);
+ uma_zfree(aiop_zone, aiop);
+ free_unr(aiod_unr, id);
+ vmspace_free(myvm);
+
+ KASSERT(p->p_vmspace == myvm,
+ ("AIOD: bad vmspace for exiting daemon"));
+ KASSERT(myvm->vm_refcnt > 1,
+ ("AIOD: bad vm refcnt for exiting daemon: %d", myvm->vm_refcnt));
+ kproc_exit(0);
+}
+
+/*
+ * Create a new AIO daemon. This is mostly a kernel-thread fork routine. The
+ * AIO daemon modifies its environment itself.
+ */
+static int
+aio_newproc(int *start)
+{
+ int error;
+ struct proc *p;
+ int id;
+
+ id = alloc_unr(aiod_unr);
+ error = kproc_create(aio_daemon, (void *)(intptr_t)id, &p,
+ RFNOWAIT, 0, "aiod%d", id);
+ if (error == 0) {
+ /*
+ * Wait until daemon is started.
+ */
+ sema_wait(&aio_newproc_sem);
+ mtx_lock(&aio_job_mtx);
+ num_aio_procs++;
+ if (start != NULL)
+ (*start)--;
+ mtx_unlock(&aio_job_mtx);
+ } else {
+ free_unr(aiod_unr, id);
+ }
+ return (error);
+}
+
+/*
+ * Try the high-performance, low-overhead bio 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_qbio(struct proc *p, struct kaiocb *job)
+{
+ struct aiocb *cb;
+ struct file *fp;
+ struct bio *bp;
+ struct buf *pbuf;
+ struct vnode *vp;
+ struct cdevsw *csw;
+ struct cdev *dev;
+ struct kaioinfo *ki;
+ int error, ref, poff;
+ vm_prot_t prot;
+
+ cb = &job->uaiocb;
+ fp = job->fd_file;
+
+ if (!(cb->aio_lio_opcode == LIO_WRITE ||
+ cb->aio_lio_opcode == LIO_READ))
+ return (-1);
+ if (fp == NULL || fp->f_type != DTYPE_VNODE)
+ return (-1);
+
+ vp = fp->f_vnode;
+ if (vp->v_type != VCHR)
+ return (-1);
+ if (vp->v_bufobj.bo_bsize == 0)
+ return (-1);
+ if (cb->aio_nbytes % vp->v_bufobj.bo_bsize)
+ return (-1);
+
+ ref = 0;
+ csw = devvn_refthread(vp, &dev, &ref);
+ if (csw == NULL)
+ return (ENXIO);
+
+ if ((csw->d_flags & D_DISK) == 0) {
+ error = -1;
+ goto unref;
+ }
+ if (cb->aio_nbytes > dev->si_iosize_max) {
+ error = -1;
+ goto unref;
+ }
+
+ ki = p->p_aioinfo;
+ poff = (vm_offset_t)cb->aio_buf & PAGE_MASK;
+ if ((dev->si_flags & SI_UNMAPPED) && unmapped_buf_allowed) {
+ if (cb->aio_nbytes > MAXPHYS) {
+ error = -1;
+ goto unref;
+ }
+
+ pbuf = NULL;
+ } else {
+ if (cb->aio_nbytes > MAXPHYS - poff) {
+ error = -1;
+ goto unref;
+ }
+ if (ki->kaio_buffer_count >= max_buf_aio) {
+ error = EAGAIN;
+ goto unref;
+ }
+
+ job->pbuf = pbuf = (struct buf *)getpbuf(NULL);
+ BUF_KERNPROC(pbuf);
+ AIO_LOCK(ki);
+ ki->kaio_buffer_count++;
+ AIO_UNLOCK(ki);
+ }
+ job->bp = bp = g_alloc_bio();
+
+ bp->bio_length = cb->aio_nbytes;
+ bp->bio_bcount = cb->aio_nbytes;
+ bp->bio_done = aio_biowakeup;
+ bp->bio_data = (void *)(uintptr_t)cb->aio_buf;
+ bp->bio_offset = cb->aio_offset;
+ bp->bio_cmd = cb->aio_lio_opcode == LIO_WRITE ? BIO_WRITE : BIO_READ;
+ bp->bio_dev = dev;
+ bp->bio_caller1 = (void *)job;
+
+ prot = VM_PROT_READ;
+ if (cb->aio_lio_opcode == LIO_READ)
+ prot |= VM_PROT_WRITE; /* Less backwards than it looks */
+ job->npages = vm_fault_quick_hold_pages(&curproc->p_vmspace->vm_map,
+ (vm_offset_t)bp->bio_data, bp->bio_length, prot, job->pages,
+ nitems(job->pages));
+ if (job->npages < 0) {
+ error = EFAULT;
+ goto doerror;
+ }
+ if (pbuf != NULL) {
+ pmap_qenter((vm_offset_t)pbuf->b_data,
+ job->pages, job->npages);
+ bp->bio_data = pbuf->b_data + poff;
+ atomic_add_int(&num_buf_aio, 1);
+ } else {
+ bp->bio_ma = job->pages;
+ bp->bio_ma_n = job->npages;
+ bp->bio_ma_offset = poff;
+ bp->bio_data = unmapped_buf;
+ bp->bio_flags |= BIO_UNMAPPED;
+ atomic_add_int(&num_unmapped_aio, 1);
+ }
+
+ /* Perform transfer. */
+ csw->d_strategy(bp);
+ dev_relthread(dev, ref);
+ return (0);
+
+doerror:
+ if (pbuf != NULL) {
+ AIO_LOCK(ki);
+ ki->kaio_buffer_count--;
+ AIO_UNLOCK(ki);
+ relpbuf(pbuf, NULL);
+ job->pbuf = NULL;
+ }
+ g_destroy_bio(bp);
+ job->bp = NULL;
+unref:
+ dev_relthread(dev, ref);
+ return (error);
+}
+
+#ifdef COMPAT_FREEBSD6
+static int
+convert_old_sigevent(struct osigevent *osig, struct sigevent *nsig)
+{
+
+ /*
+ * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are
+ * supported by AIO with the old sigevent structure.
+ */
+ nsig->sigev_notify = osig->sigev_notify;
+ switch (nsig->sigev_notify) {
+ case SIGEV_NONE:
+ break;
+ case SIGEV_SIGNAL:
+ nsig->sigev_signo = osig->__sigev_u.__sigev_signo;
+ break;
+ case SIGEV_KEVENT:
+ nsig->sigev_notify_kqueue =
+ osig->__sigev_u.__sigev_notify_kqueue;
+ nsig->sigev_value.sival_ptr = osig->sigev_value.sival_ptr;
+ break;
+ default:
+ return (EINVAL);
+ }
+ return (0);
+}
+
+static int
+aiocb_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
+{
+ struct oaiocb *ojob;
+ int error;
+
+ bzero(kjob, sizeof(struct aiocb));
+ error = copyin(ujob, kjob, sizeof(struct oaiocb));
+ if (error)
+ return (error);
+ ojob = (struct oaiocb *)kjob;
+ return (convert_old_sigevent(&ojob->aio_sigevent, &kjob->aio_sigevent));
+}
+#endif
+
+static int
+aiocb_copyin(struct aiocb *ujob, struct aiocb *kjob)
+{
+
+ return (copyin(ujob, kjob, sizeof(struct aiocb)));
+}
+
+static long
+aiocb_fetch_status(struct aiocb *ujob)
+{
+
+ return (fuword(&ujob->_aiocb_private.status));
+}
+
+static long
+aiocb_fetch_error(struct aiocb *ujob)
+{
+
+ return (fuword(&ujob->_aiocb_private.error));
+}
+
+static int
+aiocb_store_status(struct aiocb *ujob, long status)
+{
+
+ return (suword(&ujob->_aiocb_private.status, status));
+}
+
+static int
+aiocb_store_error(struct aiocb *ujob, long error)
+{
+
+ return (suword(&ujob->_aiocb_private.error, error));
+}
+
+static int
+aiocb_store_kernelinfo(struct aiocb *ujob, long jobref)
+{
+
+ return (suword(&ujob->_aiocb_private.kernelinfo, jobref));
+}
+
+static int
+aiocb_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob)
+{
+
+ return (suword(ujobp, (long)ujob));
+}
+
+static struct aiocb_ops aiocb_ops = {
+ .copyin = aiocb_copyin,
+ .fetch_status = aiocb_fetch_status,
+ .fetch_error = aiocb_fetch_error,
+ .store_status = aiocb_store_status,
+ .store_error = aiocb_store_error,
+ .store_kernelinfo = aiocb_store_kernelinfo,
+ .store_aiocb = aiocb_store_aiocb,
+};
+
+#ifdef COMPAT_FREEBSD6
+static struct aiocb_ops aiocb_ops_osigevent = {
+ .copyin = aiocb_copyin_old_sigevent,
+ .fetch_status = aiocb_fetch_status,
+ .fetch_error = aiocb_fetch_error,
+ .store_status = aiocb_store_status,
+ .store_error = aiocb_store_error,
+ .store_kernelinfo = aiocb_store_kernelinfo,
+ .store_aiocb = aiocb_store_aiocb,
+};
+#endif
+
+/*
+ * Queue a new AIO request. Choosing either the threaded or direct bio VCHR
+ * technique is done in this code.
+ */
+int
+aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
+ int type, struct aiocb_ops *ops)
+{
+ struct proc *p = td->td_proc;
+ struct file *fp;
+ struct kaiocb *job;
+ struct kaioinfo *ki;
+ struct kevent kev;
+ int opcode;
+ int error;
+ int fd, kqfd;
+ int jid;
+ u_short evflags;
+
+ if (p->p_aioinfo == NULL)
+ aio_init_aioinfo(p);
+
+ ki = p->p_aioinfo;
+
+ ops->store_status(ujob, -1);
+ ops->store_error(ujob, 0);
+ ops->store_kernelinfo(ujob, -1);
+
+ if (num_queue_count >= max_queue_count ||
+ ki->kaio_count >= max_aio_queue_per_proc) {
+ ops->store_error(ujob, EAGAIN);
+ return (EAGAIN);
+ }
+
+ job = uma_zalloc(aiocb_zone, M_WAITOK | M_ZERO);
+ knlist_init_mtx(&job->klist, AIO_MTX(ki));
+
+ error = ops->copyin(ujob, &job->uaiocb);
+ if (error) {
+ ops->store_error(ujob, error);
+ uma_zfree(aiocb_zone, job);
+ return (error);
+ }
+
+ if (job->uaiocb.aio_nbytes > IOSIZE_MAX) {
+ uma_zfree(aiocb_zone, job);
+ return (EINVAL);
+ }
+
+ if (job->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT &&
+ job->uaiocb.aio_sigevent.sigev_notify != SIGEV_SIGNAL &&
+ job->uaiocb.aio_sigevent.sigev_notify != SIGEV_THREAD_ID &&
+ job->uaiocb.aio_sigevent.sigev_notify != SIGEV_NONE) {
+ ops->store_error(ujob, EINVAL);
+ uma_zfree(aiocb_zone, job);
+ return (EINVAL);
+ }
+
+ if ((job->uaiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL ||
+ job->uaiocb.aio_sigevent.sigev_notify == SIGEV_THREAD_ID) &&
+ !_SIG_VALID(job->uaiocb.aio_sigevent.sigev_signo)) {
+ uma_zfree(aiocb_zone, job);
+ return (EINVAL);
+ }
+
+ ksiginfo_init(&job->ksi);
+
+ /* Save userspace address of the job info. */
+ job->ujob = ujob;
+
+ /* Get the opcode. */
+ if (type != LIO_NOP)
+ job->uaiocb.aio_lio_opcode = type;
+ opcode = job->uaiocb.aio_lio_opcode;
+
+ /*
+ * Validate the opcode and fetch the file object for the specified
+ * file descriptor.
+ *
+ * XXXRW: Moved the opcode validation up here so that we don't
+ * retrieve a file descriptor without knowing what the capabiltity
+ * should be.
+ */
+ fd = job->uaiocb.aio_fildes;
+ switch (opcode) {
+ case LIO_WRITE:
+ error = fget_write(td, fd, &cap_pwrite_rights, &fp);
+ break;
+ case LIO_READ:
+ error = fget_read(td, fd, &cap_pread_rights, &fp);
+ break;
+ case LIO_SYNC:
+ error = fget(td, fd, &cap_fsync_rights, &fp);
+ break;
+ case LIO_MLOCK:
+ fp = NULL;
+ break;
+ case LIO_NOP:
+ error = fget(td, fd, &cap_no_rights, &fp);
+ break;
+ default:
+ error = EINVAL;
+ }
+ if (error) {
+ uma_zfree(aiocb_zone, job);
+ ops->store_error(ujob, error);
+ return (error);
+ }
+
+ if (opcode == LIO_SYNC && fp->f_vnode == NULL) {
+ error = EINVAL;
+ goto aqueue_fail;
+ }
+
+ if ((opcode == LIO_READ || opcode == LIO_WRITE) &&
+ job->uaiocb.aio_offset < 0 &&
+ (fp->f_vnode == NULL || fp->f_vnode->v_type != VCHR)) {
+ error = EINVAL;
+ goto aqueue_fail;
+ }
+
+ job->fd_file = fp;
+
+ mtx_lock(&aio_job_mtx);
+ jid = jobrefid++;
+ job->seqno = jobseqno++;
+ mtx_unlock(&aio_job_mtx);
+ error = ops->store_kernelinfo(ujob, jid);
+ if (error) {
+ error = EINVAL;
+ goto aqueue_fail;
+ }
+ job->uaiocb._aiocb_private.kernelinfo = (void *)(intptr_t)jid;
+
+ if (opcode == LIO_NOP) {
+ fdrop(fp, td);
+ uma_zfree(aiocb_zone, job);
+ return (0);
+ }
+
+ if (job->uaiocb.aio_sigevent.sigev_notify != SIGEV_KEVENT)
+ goto no_kqueue;
+ evflags = job->uaiocb.aio_sigevent.sigev_notify_kevent_flags;
+ if ((evflags & ~(EV_CLEAR | EV_DISPATCH | EV_ONESHOT)) != 0) {
+ error = EINVAL;
+ goto aqueue_fail;
+ }
+ kqfd = job->uaiocb.aio_sigevent.sigev_notify_kqueue;
+ memset(&kev, 0, sizeof(kev));
+ kev.ident = (uintptr_t)job->ujob;
+ kev.filter = EVFILT_AIO;
+ kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1 | evflags;
+ kev.data = (intptr_t)job;
+ kev.udata = job->uaiocb.aio_sigevent.sigev_value.sival_ptr;
+ error = kqfd_register(kqfd, &kev, td, M_WAITOK);
+ if (error)
+ goto aqueue_fail;
+
+no_kqueue:
+
+ ops->store_error(ujob, EINPROGRESS);
+ job->uaiocb._aiocb_private.error = EINPROGRESS;
+ job->userproc = p;
+ job->cred = crhold(td->td_ucred);
+ job->jobflags = KAIOCB_QUEUEING;
+ job->lio = lj;
+
+ if (opcode == LIO_MLOCK) {
+ aio_schedule(job, aio_process_mlock);
+ error = 0;
+ } else if (fp->f_ops->fo_aio_queue == NULL)
+ error = aio_queue_file(fp, job);
+ else
+ error = fo_aio_queue(fp, job);
+ if (error)
+ goto aqueue_fail;
+
+ AIO_LOCK(ki);
+ job->jobflags &= ~KAIOCB_QUEUEING;
+ TAILQ_INSERT_TAIL(&ki->kaio_all, job, allist);
+ ki->kaio_count++;
+ if (lj)
+ lj->lioj_count++;
+ atomic_add_int(&num_queue_count, 1);
+ if (job->jobflags & KAIOCB_FINISHED) {
+ /*
+ * The queue callback completed the request synchronously.
+ * The bulk of the completion is deferred in that case
+ * until this point.
+ */
+ aio_bio_done_notify(p, job);
+ } else
+ TAILQ_INSERT_TAIL(&ki->kaio_jobqueue, job, plist);
+ AIO_UNLOCK(ki);
+ return (0);
+
+aqueue_fail:
+ knlist_delete(&job->klist, curthread, 0);
+ if (fp)
+ fdrop(fp, td);
+ uma_zfree(aiocb_zone, job);
+ ops->store_error(ujob, error);
+ return (error);
+}
+
+static void
+aio_cancel_daemon_job(struct kaiocb *job)
+{
+
+ mtx_lock(&aio_job_mtx);
+ if (!aio_cancel_cleared(job))
+ TAILQ_REMOVE(&aio_jobs, job, list);
+ mtx_unlock(&aio_job_mtx);
+ aio_cancel(job);
+}
+
+void
+aio_schedule(struct kaiocb *job, aio_handle_fn_t *func)
+{
+
+ mtx_lock(&aio_job_mtx);
+ if (!aio_set_cancel_function(job, aio_cancel_daemon_job)) {
+ mtx_unlock(&aio_job_mtx);
+ aio_cancel(job);
+ return;
+ }
+ job->handle_fn = func;
+ TAILQ_INSERT_TAIL(&aio_jobs, job, list);
+ aio_kick_nowait(job->userproc);
+ mtx_unlock(&aio_job_mtx);
+}
+
+static void
+aio_cancel_sync(struct kaiocb *job)
+{
+ struct kaioinfo *ki;
+
+ ki = job->userproc->p_aioinfo;
+ AIO_LOCK(ki);
+ if (!aio_cancel_cleared(job))
+ TAILQ_REMOVE(&ki->kaio_syncqueue, job, list);
+ AIO_UNLOCK(ki);
+ aio_cancel(job);
+}
+
+int
+aio_queue_file(struct file *fp, struct kaiocb *job)
+{
+ struct kaioinfo *ki;
+ struct kaiocb *job2;
+ struct vnode *vp;
+ struct mount *mp;
+ int error;
+ bool safe;
+
+ ki = job->userproc->p_aioinfo;
+ error = aio_qbio(job->userproc, job);
+ if (error >= 0)
+ return (error);
+ safe = false;
+ if (fp->f_type == DTYPE_VNODE) {
+ vp = fp->f_vnode;
+ if (vp->v_type == VREG || vp->v_type == VDIR) {
+ mp = fp->f_vnode->v_mount;
+ if (mp == NULL || (mp->mnt_flag & MNT_LOCAL) != 0)
+ safe = true;
+ }
+ }
+ if (!(safe || enable_aio_unsafe)) {
+ counted_warning(&unsafe_warningcnt,
+ "is attempting to use unsafe AIO requests");
+ return (EOPNOTSUPP);
+ }
+
+ switch (job->uaiocb.aio_lio_opcode) {
+ case LIO_READ:
+ case LIO_WRITE:
+ aio_schedule(job, aio_process_rw);
+ error = 0;
+ break;
+ case LIO_SYNC:
+ AIO_LOCK(ki);
+ TAILQ_FOREACH(job2, &ki->kaio_jobqueue, plist) {
+ if (job2->fd_file == job->fd_file &&
+ job2->uaiocb.aio_lio_opcode != LIO_SYNC &&
+ job2->seqno < job->seqno) {
+ job2->jobflags |= KAIOCB_CHECKSYNC;
+ job->pending++;
+ }
+ }
+ if (job->pending != 0) {
+ if (!aio_set_cancel_function_locked(job,
+ aio_cancel_sync)) {
+ AIO_UNLOCK(ki);
+ aio_cancel(job);
+ return (0);
+ }
+ TAILQ_INSERT_TAIL(&ki->kaio_syncqueue, job, list);
+ AIO_UNLOCK(ki);
+ return (0);
+ }
+ AIO_UNLOCK(ki);
+ aio_schedule(job, aio_process_sync);
+ error = 0;
+ break;
+ default:
+ error = EINVAL;
+ }
+ return (error);
+}
+
+static void
+aio_kick_nowait(struct proc *userp)
+{
+ struct kaioinfo *ki = userp->p_aioinfo;
+ struct aioproc *aiop;
+
+ mtx_assert(&aio_job_mtx, MA_OWNED);
+ if ((aiop = TAILQ_FIRST(&aio_freeproc)) != NULL) {
+ TAILQ_REMOVE(&aio_freeproc, aiop, list);
+ aiop->aioprocflags &= ~AIOP_FREE;
+ wakeup(aiop->aioproc);
+ } else if (num_aio_resv_start + num_aio_procs < max_aio_procs &&
+ ki->kaio_active_count + num_aio_resv_start < max_aio_per_proc) {
+ taskqueue_enqueue(taskqueue_aiod_kick, &ki->kaio_task);
+ }
+}
+
+static int
+aio_kick(struct proc *userp)
+{
+ struct kaioinfo *ki = userp->p_aioinfo;
+ struct aioproc *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->aioprocflags &= ~AIOP_FREE;
+ wakeup(aiop->aioproc);
+ } else if (num_aio_resv_start + num_aio_procs < max_aio_procs &&
+ ki->kaio_active_count + num_aio_resv_start < max_aio_per_proc) {
+ num_aio_resv_start++;
+ mtx_unlock(&aio_job_mtx);
+ error = aio_newproc(&num_aio_resv_start);
+ mtx_lock(&aio_job_mtx);
+ if (error) {
+ num_aio_resv_start--;
+ goto retryproc;
+ }
+ } else {
+ ret = -1;
+ }
+ return (ret);
+}
+
+static void
+aio_kick_helper(void *context, int pending)
+{
+ struct proc *userp = context;
+
+ mtx_lock(&aio_job_mtx);
+ while (--pending >= 0) {
+ if (aio_kick(userp))
+ break;
+ }
+ mtx_unlock(&aio_job_mtx);
+}
+
+/*
+ * Support the aio_return system call, as a side-effect, kernel resources are
+ * released.
+ */
+static int
+kern_aio_return(struct thread *td, struct aiocb *ujob, struct aiocb_ops *ops)
+{
+ struct proc *p = td->td_proc;
+ struct kaiocb *job;
+ struct kaioinfo *ki;
+ long status, error;
+
+ ki = p->p_aioinfo;
+ if (ki == NULL)
+ return (EINVAL);
+ AIO_LOCK(ki);
+ TAILQ_FOREACH(job, &ki->kaio_done, plist) {
+ if (job->ujob == ujob)
+ break;
+ }
+ if (job != NULL) {
+ MPASS(job->jobflags & KAIOCB_FINISHED);
+ status = job->uaiocb._aiocb_private.status;
+ error = job->uaiocb._aiocb_private.error;
+ td->td_retval[0] = status;
+ td->td_ru.ru_oublock += job->outblock;
+ td->td_ru.ru_inblock += job->inblock;
+ td->td_ru.ru_msgsnd += job->msgsnd;
+ td->td_ru.ru_msgrcv += job->msgrcv;
+ aio_free_entry(job);
+ AIO_UNLOCK(ki);
+ ops->store_error(ujob, error);
+ ops->store_status(ujob, status);
+ } else {
+ error = EINVAL;
+ AIO_UNLOCK(ki);
+ }
+ return (error);
+}
+
+int
+sys_aio_return(struct thread *td, struct aio_return_args *uap)
+{
+
+ return (kern_aio_return(td, uap->aiocbp, &aiocb_ops));
+}
+
+/*
+ * Allow a process to wakeup when any of the I/O requests are completed.
+ */
+static int
+kern_aio_suspend(struct thread *td, int njoblist, struct aiocb **ujoblist,
+ struct timespec *ts)
+{
+ struct proc *p = td->td_proc;
+ struct timeval atv;
+ struct kaioinfo *ki;
+ struct kaiocb *firstjob, *job;
+ int error, i, timo;
+
+ timo = 0;
+ if (ts) {
+ if (ts->tv_nsec < 0 || ts->tv_nsec >= 1000000000)
+ return (EINVAL);
+
+ TIMESPEC_TO_TIMEVAL(&atv, ts);
+ if (itimerfix(&atv))
+ return (EINVAL);
+ timo = tvtohz(&atv);
+ }
+
+ ki = p->p_aioinfo;
+ if (ki == NULL)
+ return (EAGAIN);
+
+ if (njoblist == 0)
+ return (0);
+
+ AIO_LOCK(ki);
+ for (;;) {
+ firstjob = NULL;
+ error = 0;
+ TAILQ_FOREACH(job, &ki->kaio_all, allist) {
+ for (i = 0; i < njoblist; i++) {
+ if (job->ujob == ujoblist[i]) {
+ if (firstjob == NULL)
+ firstjob = job;
+ if (job->jobflags & KAIOCB_FINISHED)
+ goto RETURN;
+ }
+ }
+ }
+ /* All tasks were finished. */
+ if (firstjob == NULL)
+ break;
+
+ ki->kaio_flags |= KAIO_WAKEUP;
+ error = msleep(&p->p_aioinfo, AIO_MTX(ki), PRIBIO | PCATCH,
+ "aiospn", timo);
+ if (error == ERESTART)
+ error = EINTR;
+ if (error)
+ break;
+ }
+RETURN:
+ AIO_UNLOCK(ki);
+ return (error);
+}
+
+int
+sys_aio_suspend(struct thread *td, struct aio_suspend_args *uap)
+{
+ struct timespec ts, *tsp;
+ struct aiocb **ujoblist;
+ int error;
+
+ if (uap->nent < 0 || uap->nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (uap->timeout) {
+ /* Get timespec struct. */
+ if ((error = copyin(uap->timeout, &ts, sizeof(ts))) != 0)
+ return (error);
+ tsp = &ts;
+ } else
+ tsp = NULL;
+
+ ujoblist = malloc(uap->nent * sizeof(ujoblist[0]), M_AIOS, M_WAITOK);
+ error = copyin(uap->aiocbp, ujoblist, uap->nent * sizeof(ujoblist[0]));
+ if (error == 0)
+ error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);
+ free(ujoblist, M_AIOS);
+ return (error);
+}
+
+/*
+ * aio_cancel cancels any non-bio aio operations not currently in progress.
+ */
+int
+sys_aio_cancel(struct thread *td, struct aio_cancel_args *uap)
+{
+ struct proc *p = td->td_proc;
+ struct kaioinfo *ki;
+ struct kaiocb *job, *jobn;
+ struct file *fp;
+ int error;
+ int cancelled = 0;
+ int notcancelled = 0;
+ struct vnode *vp;
+
+ /* Lookup file object. */
+ error = fget(td, uap->fd, &cap_no_rights, &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(job, &ki->kaio_jobqueue, plist, jobn) {
+ if ((uap->fd == job->uaiocb.aio_fildes) &&
+ ((uap->aiocbp == NULL) ||
+ (uap->aiocbp == job->ujob))) {
+ if (aio_cancel_job(p, ki, job)) {
+ cancelled++;
+ } else {
+ notcancelled++;
+ }
+ if (uap->aiocbp != NULL)
+ break;
+ }
+ }
+ AIO_UNLOCK(ki);
+
+done:
+ fdrop(fp, td);
+
+ if (uap->aiocbp != NULL) {
+ if (cancelled) {
+ td->td_retval[0] = AIO_CANCELED;
+ return (0);
+ }
+ }
+
+ if (notcancelled) {
+ td->td_retval[0] = AIO_NOTCANCELED;
+ return (0);
+ }
+
+ if (cancelled) {
+ td->td_retval[0] = AIO_CANCELED;
+ return (0);
+ }
+
+ td->td_retval[0] = AIO_ALLDONE;
+
+ return (0);
+}
+
+/*
+ * aio_error is implemented in the kernel level for compatibility purposes
+ * only. For a user mode async implementation, it would be best to do it in
+ * a userland subroutine.
+ */
+static int
+kern_aio_error(struct thread *td, struct aiocb *ujob, struct aiocb_ops *ops)
+{
+ struct proc *p = td->td_proc;
+ struct kaiocb *job;
+ struct kaioinfo *ki;
+ int status;
+
+ ki = p->p_aioinfo;
+ if (ki == NULL) {
+ td->td_retval[0] = EINVAL;
+ return (0);
+ }
+
+ AIO_LOCK(ki);
+ TAILQ_FOREACH(job, &ki->kaio_all, allist) {
+ if (job->ujob == ujob) {
+ if (job->jobflags & KAIOCB_FINISHED)
+ td->td_retval[0] =
+ job->uaiocb._aiocb_private.error;
+ else
+ td->td_retval[0] = EINPROGRESS;
+ AIO_UNLOCK(ki);
+ return (0);
+ }
+ }
+ AIO_UNLOCK(ki);
+
+ /*
+ * Hack for failure of aio_aqueue.
+ */
+ status = ops->fetch_status(ujob);
+ if (status == -1) {
+ td->td_retval[0] = ops->fetch_error(ujob);
+ return (0);
+ }
+
+ td->td_retval[0] = EINVAL;
+ return (0);
+}
+
+int
+sys_aio_error(struct thread *td, struct aio_error_args *uap)
+{
+
+ return (kern_aio_error(td, uap->aiocbp, &aiocb_ops));
+}
+
+/* syscall - asynchronous read from a file (REALTIME) */
+#ifdef COMPAT_FREEBSD6
+int
+freebsd6_aio_read(struct thread *td, struct freebsd6_aio_read_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
+ &aiocb_ops_osigevent));
+}
+#endif
+
+int
+sys_aio_read(struct thread *td, struct aio_read_args *uap)
+{
+
+ return (aio_aqueue(td, uap->aiocbp, NULL, LIO_READ, &aiocb_ops));
+}
+
+/* syscall - asynchronous write to a file (REALTIME) */
+#ifdef COMPAT_FREEBSD6
+int
+freebsd6_aio_write(struct thread *td, struct freebsd6_aio_write_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
+ &aiocb_ops_osigevent));
+}
+#endif
+
+int
+sys_aio_write(struct thread *td, struct aio_write_args *uap)
+{
+
+ return (aio_aqueue(td, uap->aiocbp, NULL, LIO_WRITE, &aiocb_ops));
+}
+
+int
+sys_aio_mlock(struct thread *td, struct aio_mlock_args *uap)
+{
+
+ return (aio_aqueue(td, uap->aiocbp, NULL, LIO_MLOCK, &aiocb_ops));
+}
+
+static int
+kern_lio_listio(struct thread *td, int mode, struct aiocb * const *uacb_list,
+ struct aiocb **acb_list, int nent, struct sigevent *sig,
+ struct aiocb_ops *ops)
+{
+ struct proc *p = td->td_proc;
+ struct aiocb *job;
+ struct kaioinfo *ki;
+ struct aioliojob *lj;
+ struct kevent kev;
+ int error;
+ int nagain, nerror;
+ int i;
+
+ if ((mode != LIO_NOWAIT) && (mode != LIO_WAIT))
+ return (EINVAL);
+
+ if (nent < 0 || nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (p->p_aioinfo == NULL)
+ aio_init_aioinfo(p);
+
+ ki = p->p_aioinfo;
+
+ lj = uma_zalloc(aiolio_zone, M_WAITOK);
+ lj->lioj_flags = 0;
+ lj->lioj_count = 0;
+ lj->lioj_finished_count = 0;
+ knlist_init_mtx(&lj->klist, AIO_MTX(ki));
+ ksiginfo_init(&lj->lioj_ksi);
+
+ /*
+ * Setup signal.
+ */
+ if (sig && (mode == LIO_NOWAIT)) {
+ bcopy(sig, &lj->lioj_signal, sizeof(lj->lioj_signal));
+ if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
+ /* Assume only new style KEVENT */
+ memset(&kev, 0, sizeof(kev));
+ kev.filter = EVFILT_LIO;
+ kev.flags = EV_ADD | EV_ENABLE | EV_FLAG1;
+ kev.ident = (uintptr_t)uacb_list; /* something unique */
+ kev.data = (intptr_t)lj;
+ /* pass user defined sigval data */
+ kev.udata = lj->lioj_signal.sigev_value.sival_ptr;
+ error = kqfd_register(
+ lj->lioj_signal.sigev_notify_kqueue, &kev, td,
+ M_WAITOK);
+ 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.
+ */
+ nagain = 0;
+ nerror = 0;
+ for (i = 0; i < nent; i++) {
+ job = acb_list[i];
+ if (job != NULL) {
+ error = aio_aqueue(td, job, lj, LIO_NOP, ops);
+ if (error == EAGAIN)
+ nagain++;
+ else if (error != 0)
+ nerror++;
+ }
+ }
+
+ error = 0;
+ AIO_LOCK(ki);
+ if (mode == LIO_WAIT) {
+ while (lj->lioj_count - 1 != lj->lioj_finished_count) {
+ ki->kaio_flags |= KAIO_WAKEUP;
+ error = msleep(&p->p_aioinfo, AIO_MTX(ki),
+ PRIBIO | PCATCH, "aiospn", 0);
+ if (error == ERESTART)
+ error = EINTR;
+ if (error)
+ break;
+ }
+ } else {
+ if (lj->lioj_count - 1 == lj->lioj_finished_count) {
+ if (lj->lioj_signal.sigev_notify == SIGEV_KEVENT) {
+ lj->lioj_flags |= LIOJ_KEVENT_POSTED;
+ KNOTE_LOCKED(&lj->klist, 1);
+ }
+ if ((lj->lioj_flags & (LIOJ_SIGNAL|LIOJ_SIGNAL_POSTED))
+ == LIOJ_SIGNAL
+ && (lj->lioj_signal.sigev_notify == SIGEV_SIGNAL ||
+ lj->lioj_signal.sigev_notify == SIGEV_THREAD_ID)) {
+ aio_sendsig(p, &lj->lioj_signal,
+ &lj->lioj_ksi);
+ lj->lioj_flags |= LIOJ_SIGNAL_POSTED;
+ }
+ }
+ }
+ lj->lioj_count--;
+ if (lj->lioj_count == 0) {
+ TAILQ_REMOVE(&ki->kaio_liojoblist, lj, lioj_list);
+ knlist_delete(&lj->klist, curthread, 1);
+ PROC_LOCK(p);
+ sigqueue_take(&lj->lioj_ksi);
+ PROC_UNLOCK(p);
+ AIO_UNLOCK(ki);
+ uma_zfree(aiolio_zone, lj);
+ } else
+ AIO_UNLOCK(ki);
+
+ if (nerror)
+ return (EIO);
+ else if (nagain)
+ return (EAGAIN);
+ else
+ return (error);
+}
+
+/* syscall - list directed I/O (REALTIME) */
+#ifdef COMPAT_FREEBSD6
+int
+freebsd6_lio_listio(struct thread *td, struct freebsd6_lio_listio_args *uap)
+{
+ struct aiocb **acb_list;
+ struct sigevent *sigp, sig;
+ struct osigevent osig;
+ int error, nent;
+
+ if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
+ return (EINVAL);
+
+ nent = uap->nent;
+ if (nent < 0 || nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (uap->sig && (uap->mode == LIO_NOWAIT)) {
+ error = copyin(uap->sig, &osig, sizeof(osig));
+ if (error)
+ return (error);
+ error = convert_old_sigevent(&osig, &sig);
+ if (error)
+ return (error);
+ sigp = &sig;
+ } else
+ sigp = NULL;
+
+ acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
+ error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0]));
+ if (error == 0)
+ error = kern_lio_listio(td, uap->mode,
+ (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
+ &aiocb_ops_osigevent);
+ free(acb_list, M_LIO);
+ return (error);
+}
+#endif
+
+/* syscall - list directed I/O (REALTIME) */
+int
+sys_lio_listio(struct thread *td, struct lio_listio_args *uap)
+{
+ struct aiocb **acb_list;
+ struct sigevent *sigp, sig;
+ int error, nent;
+
+ if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
+ return (EINVAL);
+
+ nent = uap->nent;
+ if (nent < 0 || nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (uap->sig && (uap->mode == LIO_NOWAIT)) {
+ error = copyin(uap->sig, &sig, sizeof(sig));
+ if (error)
+ return (error);
+ sigp = &sig;
+ } else
+ sigp = NULL;
+
+ acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
+ error = copyin(uap->acb_list, acb_list, nent * sizeof(acb_list[0]));
+ if (error == 0)
+ error = kern_lio_listio(td, uap->mode, uap->acb_list, acb_list,
+ nent, sigp, &aiocb_ops);
+ free(acb_list, M_LIO);
+ return (error);
+}
+
+static void
+aio_biowakeup(struct bio *bp)
+{
+ struct kaiocb *job = (struct kaiocb *)bp->bio_caller1;
+ struct proc *userp;
+ struct kaioinfo *ki;
+ size_t nbytes;
+ int error, nblks;
+
+ /* Release mapping into kernel space. */
+ userp = job->userproc;
+ ki = userp->p_aioinfo;
+ if (job->pbuf) {
+ pmap_qremove((vm_offset_t)job->pbuf->b_data, job->npages);
+ relpbuf(job->pbuf, NULL);
+ job->pbuf = NULL;
+ atomic_subtract_int(&num_buf_aio, 1);
+ AIO_LOCK(ki);
+ ki->kaio_buffer_count--;
+ AIO_UNLOCK(ki);
+ } else
+ atomic_subtract_int(&num_unmapped_aio, 1);
+ vm_page_unhold_pages(job->pages, job->npages);
+
+ bp = job->bp;
+ job->bp = NULL;
+ nbytes = job->uaiocb.aio_nbytes - bp->bio_resid;
+ error = 0;
+ if (bp->bio_flags & BIO_ERROR)
+ error = bp->bio_error;
+ nblks = btodb(nbytes);
+ if (job->uaiocb.aio_lio_opcode == LIO_WRITE)
+ job->outblock += nblks;
+ else
+ job->inblock += nblks;
+
+ if (error)
+ aio_complete(job, -1, error);
+ else
+ aio_complete(job, nbytes, 0);
+
+ g_destroy_bio(bp);
+}
+
+/* syscall - wait for the next completion of an aio request */
+static int
+kern_aio_waitcomplete(struct thread *td, struct aiocb **ujobp,
+ struct timespec *ts, struct aiocb_ops *ops)
+{
+ struct proc *p = td->td_proc;
+ struct timeval atv;
+ struct kaioinfo *ki;
+ struct kaiocb *job;
+ struct aiocb *ujob;
+ long error, status;
+ int timo;
+
+ ops->store_aiocb(ujobp, NULL);
+
+ if (ts == NULL) {
+ timo = 0;
+ } else if (ts->tv_sec == 0 && ts->tv_nsec == 0) {
+ timo = -1;
+ } else {
+ 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;
+ job = NULL;
+ AIO_LOCK(ki);
+ while ((job = TAILQ_FIRST(&ki->kaio_done)) == NULL) {
+ if (timo == -1) {
+ error = EWOULDBLOCK;
+ break;
+ }
+ 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 (job != NULL) {
+ MPASS(job->jobflags & KAIOCB_FINISHED);
+ ujob = job->ujob;
+ status = job->uaiocb._aiocb_private.status;
+ error = job->uaiocb._aiocb_private.error;
+ td->td_retval[0] = status;
+ td->td_ru.ru_oublock += job->outblock;
+ td->td_ru.ru_inblock += job->inblock;
+ td->td_ru.ru_msgsnd += job->msgsnd;
+ td->td_ru.ru_msgrcv += job->msgrcv;
+ aio_free_entry(job);
+ AIO_UNLOCK(ki);
+ ops->store_aiocb(ujobp, ujob);
+ ops->store_error(ujob, error);
+ ops->store_status(ujob, status);
+ } else
+ AIO_UNLOCK(ki);
+
+ return (error);
+}
+
+int
+sys_aio_waitcomplete(struct thread *td, struct aio_waitcomplete_args *uap)
+{
+ struct timespec ts, *tsp;
+ int error;
+
+ if (uap->timeout) {
+ /* Get timespec struct. */
+ error = copyin(uap->timeout, &ts, sizeof(ts));
+ if (error)
+ return (error);
+ tsp = &ts;
+ } else
+ tsp = NULL;
+
+ return (kern_aio_waitcomplete(td, uap->aiocbp, tsp, &aiocb_ops));
+}
+
+static int
+kern_aio_fsync(struct thread *td, int op, struct aiocb *ujob,
+ struct aiocb_ops *ops)
+{
+
+ if (op != O_SYNC) /* XXX lack of O_DSYNC */
+ return (EINVAL);
+ return (aio_aqueue(td, ujob, NULL, LIO_SYNC, ops));
+}
+
+int
+sys_aio_fsync(struct thread *td, struct aio_fsync_args *uap)
+{
+
+ return (kern_aio_fsync(td, uap->op, uap->aiocbp, &aiocb_ops));
+}
+
+/* kqueue attach function */
+static int
+filt_aioattach(struct knote *kn)
+{
+ struct kaiocb *job;
+
+ job = (struct kaiocb *)(uintptr_t)kn->kn_sdata;
+
+ /*
+ * The job pointer must be validated before using it, so
+ * registration is restricted to the kernel; the user cannot
+ * set EV_FLAG1.
+ */
+ if ((kn->kn_flags & EV_FLAG1) == 0)
+ return (EPERM);
+ kn->kn_ptr.p_aio = job;
+ kn->kn_flags &= ~EV_FLAG1;
+
+ knlist_add(&job->klist, kn, 0);
+
+ return (0);
+}
+
+/* kqueue detach function */
+static void
+filt_aiodetach(struct knote *kn)
+{
+ struct knlist *knl;
+
+ knl = &kn->kn_ptr.p_aio->klist;
+ knl->kl_lock(knl->kl_lockarg);
+ if (!knlist_empty(knl))
+ knlist_remove(knl, kn, 1);
+ knl->kl_unlock(knl->kl_lockarg);
+}
+
+/* kqueue filter function */
+/*ARGSUSED*/
+static int
+filt_aio(struct knote *kn, long hint)
+{
+ struct kaiocb *job = kn->kn_ptr.p_aio;
+
+ kn->kn_data = job->uaiocb._aiocb_private.error;
+ if (!(job->jobflags & KAIOCB_FINISHED))
+ return (0);
+ kn->kn_flags |= EV_EOF;
+ return (1);
+}
+
+/* kqueue attach function */
+static int
+filt_lioattach(struct knote *kn)
+{
+ struct aioliojob *lj;
+
+ lj = (struct aioliojob *)(uintptr_t)kn->kn_sdata;
+
+ /*
+ * The aioliojob pointer must be validated before using it, so
+ * registration is restricted to the kernel; the user cannot
+ * set EV_FLAG1.
+ */
+ if ((kn->kn_flags & EV_FLAG1) == 0)
+ return (EPERM);
+ kn->kn_ptr.p_lio = lj;
+ kn->kn_flags &= ~EV_FLAG1;
+
+ knlist_add(&lj->klist, kn, 0);
+
+ return (0);
+}
+
+/* kqueue detach function */
+static void
+filt_liodetach(struct knote *kn)
+{
+ struct knlist *knl;
+
+ knl = &kn->kn_ptr.p_lio->klist;
+ knl->kl_lock(knl->kl_lockarg);
+ if (!knlist_empty(knl))
+ knlist_remove(knl, kn, 1);
+ knl->kl_unlock(knl->kl_lockarg);
+}
+
+/* kqueue filter function */
+/*ARGSUSED*/
+static int
+filt_lio(struct knote *kn, long hint)
+{
+ struct aioliojob * lj = kn->kn_ptr.p_lio;
+
+ return (lj->lioj_flags & LIOJ_KEVENT_POSTED);
+}
+
+#ifdef COMPAT_FREEBSD32
+#include <sys/mount.h>
+#include <sys/socket.h>
+#include <compat/freebsd32/freebsd32.h>
+#include <compat/freebsd32/freebsd32_proto.h>
+#include <compat/freebsd32/freebsd32_signal.h>
+#include <compat/freebsd32/freebsd32_syscall.h>
+#include <compat/freebsd32/freebsd32_util.h>
+
+struct __aiocb_private32 {
+ int32_t status;
+ int32_t error;
+ uint32_t kernelinfo;
+};
+
+#ifdef COMPAT_FREEBSD6
+typedef struct oaiocb32 {
+ int aio_fildes; /* File descriptor */
+ uint64_t aio_offset __packed; /* File offset for I/O */
+ uint32_t aio_buf; /* I/O buffer in process space */
+ uint32_t aio_nbytes; /* Number of bytes for I/O */
+ struct osigevent32 aio_sigevent; /* Signal to deliver */
+ int aio_lio_opcode; /* LIO opcode */
+ int aio_reqprio; /* Request priority -- ignored */
+ struct __aiocb_private32 _aiocb_private;
+} oaiocb32_t;
+#endif
+
+typedef struct aiocb32 {
+ int32_t aio_fildes; /* File descriptor */
+ uint64_t aio_offset __packed; /* File offset for I/O */
+ uint32_t aio_buf; /* I/O buffer in process space */
+ uint32_t aio_nbytes; /* Number of bytes for I/O */
+ int __spare__[2];
+ uint32_t __spare2__;
+ int aio_lio_opcode; /* LIO opcode */
+ int aio_reqprio; /* Request priority -- ignored */
+ struct __aiocb_private32 _aiocb_private;
+ struct sigevent32 aio_sigevent; /* Signal to deliver */
+} aiocb32_t;
+
+#ifdef COMPAT_FREEBSD6
+static int
+convert_old_sigevent32(struct osigevent32 *osig, struct sigevent *nsig)
+{
+
+ /*
+ * Only SIGEV_NONE, SIGEV_SIGNAL, and SIGEV_KEVENT are
+ * supported by AIO with the old sigevent structure.
+ */
+ CP(*osig, *nsig, sigev_notify);
+ switch (nsig->sigev_notify) {
+ case SIGEV_NONE:
+ break;
+ case SIGEV_SIGNAL:
+ nsig->sigev_signo = osig->__sigev_u.__sigev_signo;
+ break;
+ case SIGEV_KEVENT:
+ nsig->sigev_notify_kqueue =
+ osig->__sigev_u.__sigev_notify_kqueue;
+ PTRIN_CP(*osig, *nsig, sigev_value.sival_ptr);
+ break;
+ default:
+ return (EINVAL);
+ }
+ return (0);
+}
+
+static int
+aiocb32_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
+{
+ struct oaiocb32 job32;
+ int error;
+
+ bzero(kjob, sizeof(struct aiocb));
+ error = copyin(ujob, &job32, sizeof(job32));
+ if (error)
+ return (error);
+
+ CP(job32, *kjob, aio_fildes);
+ CP(job32, *kjob, aio_offset);
+ PTRIN_CP(job32, *kjob, aio_buf);
+ CP(job32, *kjob, aio_nbytes);
+ CP(job32, *kjob, aio_lio_opcode);
+ CP(job32, *kjob, aio_reqprio);
+ CP(job32, *kjob, _aiocb_private.status);
+ CP(job32, *kjob, _aiocb_private.error);
+ PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo);
+ return (convert_old_sigevent32(&job32.aio_sigevent,
+ &kjob->aio_sigevent));
+}
+#endif
+
+static int
+aiocb32_copyin(struct aiocb *ujob, struct aiocb *kjob)
+{
+ struct aiocb32 job32;
+ int error;
+
+ error = copyin(ujob, &job32, sizeof(job32));
+ if (error)
+ return (error);
+ CP(job32, *kjob, aio_fildes);
+ CP(job32, *kjob, aio_offset);
+ PTRIN_CP(job32, *kjob, aio_buf);
+ CP(job32, *kjob, aio_nbytes);
+ CP(job32, *kjob, aio_lio_opcode);
+ CP(job32, *kjob, aio_reqprio);
+ CP(job32, *kjob, _aiocb_private.status);
+ CP(job32, *kjob, _aiocb_private.error);
+ PTRIN_CP(job32, *kjob, _aiocb_private.kernelinfo);
+ return (convert_sigevent32(&job32.aio_sigevent, &kjob->aio_sigevent));
+}
+
+static long
+aiocb32_fetch_status(struct aiocb *ujob)
+{
+ struct aiocb32 *ujob32;
+
+ ujob32 = (struct aiocb32 *)ujob;
+ return (fuword32(&ujob32->_aiocb_private.status));
+}
+
+static long
+aiocb32_fetch_error(struct aiocb *ujob)
+{
+ struct aiocb32 *ujob32;
+
+ ujob32 = (struct aiocb32 *)ujob;
+ return (fuword32(&ujob32->_aiocb_private.error));
+}
+
+static int
+aiocb32_store_status(struct aiocb *ujob, long status)
+{
+ struct aiocb32 *ujob32;
+
+ ujob32 = (struct aiocb32 *)ujob;
+ return (suword32(&ujob32->_aiocb_private.status, status));
+}
+
+static int
+aiocb32_store_error(struct aiocb *ujob, long error)
+{
+ struct aiocb32 *ujob32;
+
+ ujob32 = (struct aiocb32 *)ujob;
+ return (suword32(&ujob32->_aiocb_private.error, error));
+}
+
+static int
+aiocb32_store_kernelinfo(struct aiocb *ujob, long jobref)
+{
+ struct aiocb32 *ujob32;
+
+ ujob32 = (struct aiocb32 *)ujob;
+ return (suword32(&ujob32->_aiocb_private.kernelinfo, jobref));
+}
+
+static int
+aiocb32_store_aiocb(struct aiocb **ujobp, struct aiocb *ujob)
+{
+
+ return (suword32(ujobp, (long)ujob));
+}
+
+static struct aiocb_ops aiocb32_ops = {
+ .copyin = aiocb32_copyin,
+ .fetch_status = aiocb32_fetch_status,
+ .fetch_error = aiocb32_fetch_error,
+ .store_status = aiocb32_store_status,
+ .store_error = aiocb32_store_error,
+ .store_kernelinfo = aiocb32_store_kernelinfo,
+ .store_aiocb = aiocb32_store_aiocb,
+};
+
+#ifdef COMPAT_FREEBSD6
+static struct aiocb_ops aiocb32_ops_osigevent = {
+ .copyin = aiocb32_copyin_old_sigevent,
+ .fetch_status = aiocb32_fetch_status,
+ .fetch_error = aiocb32_fetch_error,
+ .store_status = aiocb32_store_status,
+ .store_error = aiocb32_store_error,
+ .store_kernelinfo = aiocb32_store_kernelinfo,
+ .store_aiocb = aiocb32_store_aiocb,
+};
+#endif
+
+int
+freebsd32_aio_return(struct thread *td, struct freebsd32_aio_return_args *uap)
+{
+
+ return (kern_aio_return(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops));
+}
+
+int
+freebsd32_aio_suspend(struct thread *td, struct freebsd32_aio_suspend_args *uap)
+{
+ struct timespec32 ts32;
+ struct timespec ts, *tsp;
+ struct aiocb **ujoblist;
+ uint32_t *ujoblist32;
+ int error, i;
+
+ if (uap->nent < 0 || uap->nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (uap->timeout) {
+ /* Get timespec struct. */
+ if ((error = copyin(uap->timeout, &ts32, sizeof(ts32))) != 0)
+ return (error);
+ CP(ts32, ts, tv_sec);
+ CP(ts32, ts, tv_nsec);
+ tsp = &ts;
+ } else
+ tsp = NULL;
+
+ ujoblist = malloc(uap->nent * sizeof(ujoblist[0]), M_AIOS, M_WAITOK);
+ ujoblist32 = (uint32_t *)ujoblist;
+ error = copyin(uap->aiocbp, ujoblist32, uap->nent *
+ sizeof(ujoblist32[0]));
+ if (error == 0) {
+ for (i = uap->nent - 1; i >= 0; i--)
+ ujoblist[i] = PTRIN(ujoblist32[i]);
+
+ error = kern_aio_suspend(td, uap->nent, ujoblist, tsp);
+ }
+ free(ujoblist, M_AIOS);
+ return (error);
+}
+
+int
+freebsd32_aio_error(struct thread *td, struct freebsd32_aio_error_args *uap)
+{
+
+ return (kern_aio_error(td, (struct aiocb *)uap->aiocbp, &aiocb32_ops));
+}
+
+#ifdef COMPAT_FREEBSD6
+int
+freebsd6_freebsd32_aio_read(struct thread *td,
+ struct freebsd6_freebsd32_aio_read_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
+ &aiocb32_ops_osigevent));
+}
+#endif
+
+int
+freebsd32_aio_read(struct thread *td, struct freebsd32_aio_read_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READ,
+ &aiocb32_ops));
+}
+
+#ifdef COMPAT_FREEBSD6
+int
+freebsd6_freebsd32_aio_write(struct thread *td,
+ struct freebsd6_freebsd32_aio_write_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
+ &aiocb32_ops_osigevent));
+}
+#endif
+
+int
+freebsd32_aio_write(struct thread *td, struct freebsd32_aio_write_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITE,
+ &aiocb32_ops));
+}
+
+int
+freebsd32_aio_mlock(struct thread *td, struct freebsd32_aio_mlock_args *uap)
+{
+
+ return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_MLOCK,
+ &aiocb32_ops));
+}
+
+int
+freebsd32_aio_waitcomplete(struct thread *td,
+ struct freebsd32_aio_waitcomplete_args *uap)
+{
+ struct timespec32 ts32;
+ struct timespec ts, *tsp;
+ int error;
+
+ if (uap->timeout) {
+ /* Get timespec struct. */
+ error = copyin(uap->timeout, &ts32, sizeof(ts32));
+ if (error)
+ return (error);
+ CP(ts32, ts, tv_sec);
+ CP(ts32, ts, tv_nsec);
+ tsp = &ts;
+ } else
+ tsp = NULL;
+
+ return (kern_aio_waitcomplete(td, (struct aiocb **)uap->aiocbp, tsp,
+ &aiocb32_ops));
+}
+
+int
+freebsd32_aio_fsync(struct thread *td, struct freebsd32_aio_fsync_args *uap)
+{
+
+ return (kern_aio_fsync(td, uap->op, (struct aiocb *)uap->aiocbp,
+ &aiocb32_ops));
+}
+
+#ifdef COMPAT_FREEBSD6
+int
+freebsd6_freebsd32_lio_listio(struct thread *td,
+ struct freebsd6_freebsd32_lio_listio_args *uap)
+{
+ struct aiocb **acb_list;
+ struct sigevent *sigp, sig;
+ struct osigevent32 osig;
+ uint32_t *acb_list32;
+ int error, i, nent;
+
+ if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
+ return (EINVAL);
+
+ nent = uap->nent;
+ if (nent < 0 || nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (uap->sig && (uap->mode == LIO_NOWAIT)) {
+ error = copyin(uap->sig, &osig, sizeof(osig));
+ if (error)
+ return (error);
+ error = convert_old_sigevent32(&osig, &sig);
+ if (error)
+ return (error);
+ sigp = &sig;
+ } else
+ sigp = NULL;
+
+ acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK);
+ error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t));
+ if (error) {
+ free(acb_list32, M_LIO);
+ return (error);
+ }
+ acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
+ for (i = 0; i < nent; i++)
+ acb_list[i] = PTRIN(acb_list32[i]);
+ free(acb_list32, M_LIO);
+
+ error = kern_lio_listio(td, uap->mode,
+ (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
+ &aiocb32_ops_osigevent);
+ free(acb_list, M_LIO);
+ return (error);
+}
+#endif
+
+int
+freebsd32_lio_listio(struct thread *td, struct freebsd32_lio_listio_args *uap)
+{
+ struct aiocb **acb_list;
+ struct sigevent *sigp, sig;
+ struct sigevent32 sig32;
+ uint32_t *acb_list32;
+ int error, i, nent;
+
+ if ((uap->mode != LIO_NOWAIT) && (uap->mode != LIO_WAIT))
+ return (EINVAL);
+
+ nent = uap->nent;
+ if (nent < 0 || nent > max_aio_queue_per_proc)
+ return (EINVAL);
+
+ if (uap->sig && (uap->mode == LIO_NOWAIT)) {
+ error = copyin(uap->sig, &sig32, sizeof(sig32));
+ if (error)
+ return (error);
+ error = convert_sigevent32(&sig32, &sig);
+ if (error)
+ return (error);
+ sigp = &sig;
+ } else
+ sigp = NULL;
+
+ acb_list32 = malloc(sizeof(uint32_t) * nent, M_LIO, M_WAITOK);
+ error = copyin(uap->acb_list, acb_list32, nent * sizeof(uint32_t));
+ if (error) {
+ free(acb_list32, M_LIO);
+ return (error);
+ }
+ acb_list = malloc(sizeof(struct aiocb *) * nent, M_LIO, M_WAITOK);
+ for (i = 0; i < nent; i++)
+ acb_list[i] = PTRIN(acb_list32[i]);
+ free(acb_list32, M_LIO);
+
+ error = kern_lio_listio(td, uap->mode,
+ (struct aiocb * const *)uap->acb_list, acb_list, nent, sigp,
+ &aiocb32_ops);
+ free(acb_list, M_LIO);
+ return (error);
+}
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-05 09:04:16 +0000