A user pointer is not a suitable value for bio_data and the next block of code always overwrites bio_data anyway. Just use cb->aio_buf directly in the call to vm_fault_quick_hold_pages(). Reviewed by: kib Obtained from: CheriBSD MFC after: 1 month Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D26595
2987 lines
72 KiB
C
2987 lines
72 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1997 John S. Dyson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. John S. Dyson's name may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* DISCLAIMER: This code isn't warranted to do anything useful. Anything
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* bad that happens because of using this software isn't the responsibility
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* of the author. This software is distributed AS-IS.
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*/
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/*
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* This file contains support for the POSIX 1003.1B AIO/LIO facility.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/capsicum.h>
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#include <sys/eventhandler.h>
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#include <sys/sysproto.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/kthread.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/unistd.h>
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#include <sys/posix4.h>
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#include <sys/proc.h>
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#include <sys/resourcevar.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/protosw.h>
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#include <sys/rwlock.h>
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#include <sys/sema.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/syscall.h>
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#include <sys/sysent.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/sx.h>
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#include <sys/taskqueue.h>
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#include <sys/vnode.h>
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#include <sys/conf.h>
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#include <sys/event.h>
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#include <sys/mount.h>
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#include <geom/geom.h>
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#include <machine/atomic.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/vm_extern.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <vm/uma.h>
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#include <sys/aio.h>
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/*
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* Counter for allocating reference ids to new jobs. Wrapped to 1 on
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* overflow. (XXX will be removed soon.)
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*/
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static u_long jobrefid;
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/*
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* Counter for aio_fsync.
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*/
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static uint64_t jobseqno;
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#ifndef MAX_AIO_PER_PROC
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#define MAX_AIO_PER_PROC 32
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#endif
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#ifndef MAX_AIO_QUEUE_PER_PROC
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#define MAX_AIO_QUEUE_PER_PROC 256
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#endif
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#ifndef MAX_AIO_QUEUE
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#define MAX_AIO_QUEUE 1024 /* Bigger than MAX_AIO_QUEUE_PER_PROC */
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#endif
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#ifndef MAX_BUF_AIO
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#define MAX_BUF_AIO 16
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#endif
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FEATURE(aio, "Asynchronous I/O");
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SYSCTL_DECL(_p1003_1b);
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static MALLOC_DEFINE(M_LIO, "lio", "listio aio control block list");
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static MALLOC_DEFINE(M_AIOS, "aios", "aio_suspend aio control block list");
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static SYSCTL_NODE(_vfs, OID_AUTO, aio, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"Async IO management");
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static int enable_aio_unsafe = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, enable_unsafe, CTLFLAG_RW, &enable_aio_unsafe, 0,
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"Permit asynchronous IO on all file types, not just known-safe types");
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static unsigned int unsafe_warningcnt = 1;
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SYSCTL_UINT(_vfs_aio, OID_AUTO, unsafe_warningcnt, CTLFLAG_RW,
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&unsafe_warningcnt, 0,
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"Warnings that will be triggered upon failed IO requests on unsafe files");
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static int max_aio_procs = MAX_AIO_PROCS;
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SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_procs, CTLFLAG_RW, &max_aio_procs, 0,
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"Maximum number of kernel processes to use for handling async IO ");
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static int num_aio_procs = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, num_aio_procs, CTLFLAG_RD, &num_aio_procs, 0,
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"Number of presently active kernel processes for async IO");
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/*
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* The code will adjust the actual number of AIO processes towards this
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* number when it gets a chance.
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*/
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static int target_aio_procs = TARGET_AIO_PROCS;
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SYSCTL_INT(_vfs_aio, OID_AUTO, target_aio_procs, CTLFLAG_RW, &target_aio_procs,
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0,
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"Preferred number of ready kernel processes for async IO");
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static int max_queue_count = MAX_AIO_QUEUE;
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SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue, CTLFLAG_RW, &max_queue_count, 0,
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"Maximum number of aio requests to queue, globally");
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static int num_queue_count = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, num_queue_count, CTLFLAG_RD, &num_queue_count, 0,
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"Number of queued aio requests");
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static int num_buf_aio = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, num_buf_aio, CTLFLAG_RD, &num_buf_aio, 0,
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"Number of aio requests presently handled by the buf subsystem");
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static int num_unmapped_aio = 0;
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SYSCTL_INT(_vfs_aio, OID_AUTO, num_unmapped_aio, CTLFLAG_RD, &num_unmapped_aio,
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0,
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"Number of aio requests presently handled by unmapped I/O buffers");
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/* Number of async I/O processes in the process of being started */
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/* XXX This should be local to aio_aqueue() */
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static int num_aio_resv_start = 0;
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static int aiod_lifetime;
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SYSCTL_INT(_vfs_aio, OID_AUTO, aiod_lifetime, CTLFLAG_RW, &aiod_lifetime, 0,
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"Maximum lifetime for idle aiod");
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static int max_aio_per_proc = MAX_AIO_PER_PROC;
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SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_per_proc, CTLFLAG_RW, &max_aio_per_proc,
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0,
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"Maximum active aio requests per process");
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static int max_aio_queue_per_proc = MAX_AIO_QUEUE_PER_PROC;
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SYSCTL_INT(_vfs_aio, OID_AUTO, max_aio_queue_per_proc, CTLFLAG_RW,
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&max_aio_queue_per_proc, 0,
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"Maximum queued aio requests per process");
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static int max_buf_aio = MAX_BUF_AIO;
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SYSCTL_INT(_vfs_aio, OID_AUTO, max_buf_aio, CTLFLAG_RW, &max_buf_aio, 0,
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"Maximum buf aio requests per process");
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/*
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* Though redundant with vfs.aio.max_aio_queue_per_proc, POSIX requires
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* sysconf(3) to support AIO_LISTIO_MAX, and we implement that with
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* vfs.aio.aio_listio_max.
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*/
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SYSCTL_INT(_p1003_1b, CTL_P1003_1B_AIO_LISTIO_MAX, aio_listio_max,
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CTLFLAG_RD | CTLFLAG_CAPRD, &max_aio_queue_per_proc,
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0, "Maximum aio requests for a single lio_listio call");
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#ifdef COMPAT_FREEBSD6
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typedef struct oaiocb {
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int aio_fildes; /* File descriptor */
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off_t aio_offset; /* File offset for I/O */
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volatile void *aio_buf; /* I/O buffer in process space */
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size_t aio_nbytes; /* Number of bytes for I/O */
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struct osigevent aio_sigevent; /* Signal to deliver */
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int aio_lio_opcode; /* LIO opcode */
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int aio_reqprio; /* Request priority -- ignored */
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struct __aiocb_private _aiocb_private;
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} oaiocb_t;
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#endif
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/*
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* Below is a key of locks used to protect each member of struct kaiocb
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* aioliojob and kaioinfo and any backends.
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*
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* * - need not protected
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* a - locked by kaioinfo lock
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* b - locked by backend lock, the backend lock can be null in some cases,
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* for example, BIO belongs to this type, in this case, proc lock is
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* reused.
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* c - locked by aio_job_mtx, the lock for the generic file I/O backend.
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*/
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/*
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* If the routine that services an AIO request blocks while running in an
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* AIO kernel process it can starve other I/O requests. BIO requests
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* queued via aio_qbio() complete asynchronously and do not use AIO kernel
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* processes at all. Socket I/O requests use a separate pool of
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* kprocs and also force non-blocking I/O. Other file I/O requests
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* use the generic fo_read/fo_write operations which can block. The
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* fsync and mlock operations can also block while executing. Ideally
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* none of these requests would block while executing.
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*
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* Note that the service routines cannot toggle O_NONBLOCK in the file
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* structure directly while handling a request due to races with
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* userland threads.
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*/
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/* jobflags */
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#define KAIOCB_QUEUEING 0x01
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#define KAIOCB_CANCELLED 0x02
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#define KAIOCB_CANCELLING 0x04
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#define KAIOCB_CHECKSYNC 0x08
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#define KAIOCB_CLEARED 0x10
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#define KAIOCB_FINISHED 0x20
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/*
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* AIO process info
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*/
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#define AIOP_FREE 0x1 /* proc on free queue */
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struct aioproc {
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int aioprocflags; /* (c) AIO proc flags */
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TAILQ_ENTRY(aioproc) list; /* (c) list of processes */
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struct proc *aioproc; /* (*) the AIO proc */
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};
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/*
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* data-structure for lio signal management
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*/
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struct aioliojob {
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int lioj_flags; /* (a) listio flags */
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int lioj_count; /* (a) listio flags */
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int lioj_finished_count; /* (a) listio flags */
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struct sigevent lioj_signal; /* (a) signal on all I/O done */
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TAILQ_ENTRY(aioliojob) lioj_list; /* (a) lio list */
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struct knlist klist; /* (a) list of knotes */
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ksiginfo_t lioj_ksi; /* (a) Realtime signal info */
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};
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#define LIOJ_SIGNAL 0x1 /* signal on all done (lio) */
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#define LIOJ_SIGNAL_POSTED 0x2 /* signal has been posted */
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#define LIOJ_KEVENT_POSTED 0x4 /* kevent triggered */
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/*
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* per process aio data structure
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*/
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struct kaioinfo {
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struct mtx kaio_mtx; /* the lock to protect this struct */
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int kaio_flags; /* (a) per process kaio flags */
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int kaio_active_count; /* (c) number of currently used AIOs */
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int kaio_count; /* (a) size of AIO queue */
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int kaio_buffer_count; /* (a) number of bio buffers */
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TAILQ_HEAD(,kaiocb) kaio_all; /* (a) all AIOs in a process */
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TAILQ_HEAD(,kaiocb) kaio_done; /* (a) done queue for process */
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TAILQ_HEAD(,aioliojob) kaio_liojoblist; /* (a) list of lio jobs */
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TAILQ_HEAD(,kaiocb) kaio_jobqueue; /* (a) job queue for process */
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TAILQ_HEAD(,kaiocb) kaio_syncqueue; /* (a) queue for aio_fsync */
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TAILQ_HEAD(,kaiocb) kaio_syncready; /* (a) second q for aio_fsync */
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struct task kaio_task; /* (*) task to kick aio processes */
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struct task kaio_sync_task; /* (*) task to schedule fsync jobs */
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};
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#define AIO_LOCK(ki) mtx_lock(&(ki)->kaio_mtx)
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#define AIO_UNLOCK(ki) mtx_unlock(&(ki)->kaio_mtx)
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#define AIO_LOCK_ASSERT(ki, f) mtx_assert(&(ki)->kaio_mtx, (f))
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#define AIO_MTX(ki) (&(ki)->kaio_mtx)
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#define KAIO_RUNDOWN 0x1 /* process is being run down */
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#define KAIO_WAKEUP 0x2 /* wakeup process when AIO completes */
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/*
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* Operations used to interact with userland aio control blocks.
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* Different ABIs provide their own operations.
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*/
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struct aiocb_ops {
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int (*aio_copyin)(struct aiocb *ujob, struct aiocb *kjob);
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long (*fetch_status)(struct aiocb *ujob);
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long (*fetch_error)(struct aiocb *ujob);
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int (*store_status)(struct aiocb *ujob, long status);
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int (*store_error)(struct aiocb *ujob, long error);
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int (*store_kernelinfo)(struct aiocb *ujob, long jobref);
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int (*store_aiocb)(struct aiocb **ujobp, struct aiocb *ujob);
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};
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static TAILQ_HEAD(,aioproc) aio_freeproc; /* (c) Idle daemons */
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static struct sema aio_newproc_sem;
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static struct mtx aio_job_mtx;
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static TAILQ_HEAD(,kaiocb) aio_jobs; /* (c) Async job list */
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static struct unrhdr *aiod_unr;
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void aio_init_aioinfo(struct proc *p);
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static int aio_onceonly(void);
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static int aio_free_entry(struct kaiocb *job);
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static void aio_process_rw(struct kaiocb *job);
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static void aio_process_sync(struct kaiocb *job);
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static void aio_process_mlock(struct kaiocb *job);
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static void aio_schedule_fsync(void *context, int pending);
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static int aio_newproc(int *);
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int aio_aqueue(struct thread *td, struct aiocb *ujob,
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struct aioliojob *lio, int type, struct aiocb_ops *ops);
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static int aio_queue_file(struct file *fp, struct kaiocb *job);
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static void aio_biowakeup(struct bio *bp);
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static void aio_proc_rundown(void *arg, struct proc *p);
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static void aio_proc_rundown_exec(void *arg, struct proc *p,
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struct image_params *imgp);
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static int aio_qbio(struct proc *p, struct kaiocb *job);
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static void aio_daemon(void *param);
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static void aio_bio_done_notify(struct proc *userp, struct kaiocb *job);
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static bool aio_clear_cancel_function_locked(struct kaiocb *job);
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static int aio_kick(struct proc *userp);
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static void aio_kick_nowait(struct proc *userp);
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static void aio_kick_helper(void *context, int pending);
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static int filt_aioattach(struct knote *kn);
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static void filt_aiodetach(struct knote *kn);
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static int filt_aio(struct knote *kn, long hint);
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static int filt_lioattach(struct knote *kn);
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static void filt_liodetach(struct knote *kn);
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static int filt_lio(struct knote *kn, long hint);
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/*
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* Zones for:
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* kaio Per process async io info
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* aiop async io process data
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* aiocb async io jobs
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* aiolio list io jobs
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*/
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static uma_zone_t kaio_zone, aiop_zone, aiocb_zone, aiolio_zone;
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|
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/* kqueue filters for aio */
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static struct filterops aio_filtops = {
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.f_isfd = 0,
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.f_attach = filt_aioattach,
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.f_detach = filt_aiodetach,
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.f_event = filt_aio,
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};
|
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static struct filterops lio_filtops = {
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.f_isfd = 0,
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.f_attach = filt_lioattach,
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.f_detach = filt_liodetach,
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.f_event = filt_lio
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|
};
|
|
|
|
static eventhandler_tag exit_tag, exec_tag;
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|
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TASKQUEUE_DEFINE_THREAD(aiod_kick);
|
|
|
|
/*
|
|
* Main operations function for use as a kernel module.
|
|
*/
|
|
static int
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aio_modload(struct module *module, int cmd, void *arg)
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{
|
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int error = 0;
|
|
|
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switch (cmd) {
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case MOD_LOAD:
|
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aio_onceonly();
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break;
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case MOD_SHUTDOWN:
|
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break;
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|
default:
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|
error = EOPNOTSUPP;
|
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break;
|
|
}
|
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return (error);
|
|
}
|
|
|
|
static moduledata_t aio_mod = {
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"aio",
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&aio_modload,
|
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NULL
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};
|
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|
|
DECLARE_MODULE(aio, aio_mod, SI_SUB_VFS, SI_ORDER_ANY);
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MODULE_VERSION(aio, 1);
|
|
|
|
/*
|
|
* Startup initialization
|
|
*/
|
|
static int
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aio_onceonly(void)
|
|
{
|
|
|
|
exit_tag = EVENTHANDLER_REGISTER(process_exit, aio_proc_rundown, NULL,
|
|
EVENTHANDLER_PRI_ANY);
|
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exec_tag = EVENTHANDLER_REGISTER(process_exec, aio_proc_rundown_exec,
|
|
NULL, EVENTHANDLER_PRI_ANY);
|
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kqueue_add_filteropts(EVFILT_AIO, &aio_filtops);
|
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kqueue_add_filteropts(EVFILT_LIO, &lio_filtops);
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TAILQ_INIT(&aio_freeproc);
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sema_init(&aio_newproc_sem, 0, "aio_new_proc");
|
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mtx_init(&aio_job_mtx, "aio_job", NULL, MTX_DEF);
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TAILQ_INIT(&aio_jobs);
|
|
aiod_unr = new_unrhdr(1, INT_MAX, NULL);
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kaio_zone = uma_zcreate("AIO", sizeof(struct kaioinfo), NULL, NULL,
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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);
|
|
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 = uma_zalloc(pbuf_zone, M_WAITOK);
|
|
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_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)cb->aio_buf, 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);
|
|
uma_zfree(pbuf_zone, pbuf);
|
|
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 = {
|
|
.aio_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 = {
|
|
.aio_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->aio_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)) {
|
|
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);
|
|
uma_zfree(pbuf_zone, job->pbuf);
|
|
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 = {
|
|
.aio_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 = {
|
|
.aio_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
|