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Add aio_writev and aio_readv

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POSIX AIO is great, but it lacks vectored I/O functions. This commit
fixes that shortcoming by adding aio_writev and aio_readv. They aren't
part of the standard, but they're an obvious extension. They work just
like their synchronous equivalents pwritev and preadv.

It isn't yet possible to use vectored aiocbs with lio_listio, but that
could be added in the future.

Reviewed by:    jhb, kib, bcr
Relnotes:       yes
Differential Revision: https://reviews.freebsd.org/D27743
This commit is contained in:
Alan Somers 2021-01-02 16:34:20 -07:00
parent 486580c44c
commit 022ca2fc7f
17 changed files with 1173 additions and 294 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/libc/sys/Makefile.inc
View File

@ -354,6 +354,8 @@ MAN+= sctp_generic_recvmsg.2 \
write.2 \
_umtx_op.2
MLINKS+=aio_read.2 aio_readv.2
MLINKS+=aio_write.2 aio_writev.2
MLINKS+=accept.2 accept4.2
MLINKS+=access.2 eaccess.2 \
access.2 faccessat.2

2
lib/libc/sys/Symbol.map
View File

@ -403,6 +403,8 @@ FBSD_1.5 {
FBSD_1.6 {
__sysctlbyname;
aio_readv;
aio_writev;
close_range;
copy_file_range;
fhlink;

6
lib/libc/sys/aio_error.2
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 2, 1999
.Dd January 2, 2021
.Dt AIO_ERROR 2
.Os
.Sh NAME
@ -52,7 +52,9 @@ is returned.
If the request has completed unsuccessfully the error
status is returned as described in
.Xr read 2 ,
.Xr readv 2 ,
.Xr write 2 ,
.Xr writev 2 ,
or
.Xr fsync 2 .
On failure,
@ -76,9 +78,11 @@ does not reference an outstanding asynchronous I/O request.
.Sh SEE ALSO
.Xr aio_cancel 2 ,
.Xr aio_read 2 ,
.Xr aio_readv 2 ,
.Xr aio_return 2 ,
.Xr aio_suspend 2 ,
.Xr aio_write 2 ,
.Xr aio_writev 2 ,
.Xr fsync 2 ,
.Xr read 2 ,
.Xr write 2 ,

63
lib/libc/sys/aio_read.2
View File

@ -24,11 +24,12 @@
.\"
.\" $FreeBSD$
.\"
.Dd August 19, 2016
.Dd January 2, 2021
.Dt AIO_READ 2
.Os
.Sh NAME
.Nm aio_read
.Nm aio_read ,
.Nm aio_readv
.Nd asynchronous read from a file (REALTIME)
.Sh LIBRARY
.Lb libc
@ -36,21 +37,42 @@
.In aio.h
.Ft int
.Fn aio_read "struct aiocb *iocb"
.In sys/uio.h
.Ft int
.Fn aio_readv "struct aiocb *iocb"
.Sh DESCRIPTION
The
.Fn aio_read
system call allows the calling process to read
.Fa iocb->aio_nbytes
and
.Fn aio_readv
system calls allow the calling process to read
from the descriptor
.Fa iocb->aio_fildes
beginning at the offset
.Fa iocb->aio_offset
into the buffer pointed to by
.Fa iocb->aio_buf .
The call returns immediately after the read request has
.Fa iocb->aio_offset .
.Fn aio_read
will read
.Fa iocb->aio_nbytes
from the buffer pointed to by
.Fa iocb->aio_buf ,
whereas
.Fn aio_readv
reads the data into the
.Fa iocb->aio_iovcnt
buffers specified by the members of the
.Fa iocb->aio_iov
array.
Both syscalls return immediately after the read request has
been enqueued to the descriptor; the read may or may not have
completed at the time the call returns.
.Pp
For
.Fn aio_readv
the
.Fa iovec
structure is defined in
.Xr readv 2 .
.Pp
If _POSIX_PRIORITIZED_IO is defined, and the descriptor supports it,
then the enqueued operation is submitted at a priority equal to that
of the calling process minus
@ -61,7 +83,9 @@ The
argument
is ignored by the
.Fn aio_read
system call.
and
.Fn aio_readv
system calls.
.Pp
The
.Fa iocb
@ -108,16 +132,22 @@ is past the offset maximum for
.Fa iocb->aio_fildes ,
no I/O will occur.
.Sh RETURN VALUES
.Rv -std aio_read
.Rv -std aio_read aio_readv
.Sh DIAGNOSTICS
None.
.Sh ERRORS
The
.Fn aio_read
system call will fail if:
and
.Fn aio_readv
system calls will fail if:
.Bl -tag -width Er
.It Bq Er EAGAIN
The request was not queued because of system resource limitations.
.It Bq Er EFAULT
Part of
.Fa aio_iov
points outside the process's allocated address space.
.It Bq Er EINVAL
The asynchronous notification method in
.Fa iocb->aio_sigevent.sigev_notify
@ -130,10 +160,14 @@ are unsafe and unsafe asynchronous I/O operations are disabled.
.Pp
The following conditions may be synchronously detected when the
.Fn aio_read
or
.Fn aio_readv
system call is made, or asynchronously, at any time thereafter.
If they
are detected at call time,
.Fn aio_read
or
.Fn aio_readv
returns -1 and sets
.Va errno
appropriately; otherwise the
@ -207,11 +241,18 @@ The
system call is expected to conform to the
.St -p1003.1
standard.
The
.Fn aio_readv
system call is a FreeBSD extension, and should not be used in portable code.
.Sh HISTORY
The
.Fn aio_read
system call first appeared in
.Fx 3.0 .
The
.Fn aio_readv
system call first appeared in
.Fx 13.0 .
.Sh AUTHORS
This
manual page was written by

4
lib/libc/sys/aio_return.2
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd March 21, 2016
.Dd January 2, 2021
.Dt AIO_RETURN 2
.Os
.Sh NAME
@ -55,7 +55,9 @@ returns something other than
If the asynchronous I/O request has completed, the status is returned
as described in
.Xr read 2 ,
.Xr readv 2 ,
.Xr write 2 ,
.Xr writev 2 ,
or
.Xr fsync 2 .
Otherwise,

63
lib/libc/sys/aio_write.2
View File

@ -24,11 +24,12 @@
.\"
.\" $FreeBSD$
.\"
.Dd August 19, 2016
.Dd January 2, 2021
.Dt AIO_WRITE 2
.Os
.Sh NAME
.Nm aio_write
.Nm aio_write ,
.Nm aio_writev
.Nd asynchronous write to a file (REALTIME)
.Sh LIBRARY
.Lb libc
@ -36,28 +37,48 @@
.In aio.h
.Ft int
.Fn aio_write "struct aiocb *iocb"
.In sys/uio.h
.Ft int
.Fn aio_writev "struct aiocb *iocb"
.Sh DESCRIPTION
The
.Fn aio_write
system call allows the calling process to write
.Fa iocb->aio_nbytes
from the buffer pointed to by
.Fa iocb->aio_buf
and
.Fn aio_writev
system calls allow the calling process to write
to the descriptor
.Fa iocb->aio_fildes .
The call returns immediately after the write request has been enqueued
.Fn aio_write
will write
.Fa iocb->aio_nbytes
from the buffer pointed to by
.Fa iocb->aio_buf ,
whereas
.Fn aio_writev
gathers the data from the
.Fa iocb->aio_iovcnt
buffers specified by the members of the
.Fa iocb->aio_iov
array.
Both syscalls return immediately after the write request has been enqueued
to the descriptor; the write may or may not have completed at the time
the call returns.
If the request could not be enqueued, generally due
to invalid arguments, the call returns without having enqueued the
request.
.Pp
For
.Fn aio_writev
the
.Fa iovec
structure is defined in
.Xr writev 2 .
.Pp
If
.Dv O_APPEND
is set for
.Fa iocb->aio_fildes ,
.Fn aio_write
operations append to the file in the same order as the calls were
write operations append to the file in the same order as the calls were
made.
If
.Dv O_APPEND
@ -103,6 +124,8 @@ The asynchronous I/O control buffer
.Fa iocb
should be zeroed before the
.Fn aio_write
or
.Fn aio_writev
system call to avoid passing bogus context information to the kernel.
.Pp
Modifications of the Asynchronous I/O Control Block structure or the
@ -114,14 +137,20 @@ is past the offset maximum for
.Fa iocb->aio_fildes ,
no I/O will occur.
.Sh RETURN VALUES
.Rv -std aio_write
.Rv -std aio_write aio_writev
.Sh ERRORS
The
.Fn aio_write
system call will fail if:
and
.Fn aio_writev
system calls will fail if:
.Bl -tag -width Er
.It Bq Er EAGAIN
The request was not queued because of system resource limitations.
.It Bq Er EFAULT
Part of
.Fa aio_iov
points outside the process's allocated address space.
.It Bq Er EINVAL
The asynchronous notification method in
.Fa iocb->aio_sigevent.sigev_notify
@ -134,10 +163,14 @@ are unsafe and unsafe asynchronous I/O operations are disabled.
.Pp
The following conditions may be synchronously detected when the
.Fn aio_write
or
.Fn aio_writev
system call is made, or asynchronously, at any time thereafter.
If they
are detected at call time,
.Fn aio_write
or
.Fn aio_writev
returns -1 and sets
.Va errno
appropriately; otherwise the
@ -203,11 +236,19 @@ system call
is expected to conform to the
.St -p1003.1
standard.
.Pp
The
.Fn aio_writev
system call is a FreeBSD extension, and should not be used in portable code.
.Sh HISTORY
The
.Fn aio_write
system call first appeared in
.Fx 3.0 .
The
.Fn aio_writev
system call first appeared in
.Fx 13.0 .
.Sh AUTHORS
This manual page was written by
.An Wes Peters Aq Mt wes@softweyr.com .

4
share/man/man4/aio.4
View File

@ -27,7 +27,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 22, 2017
.Dd January 2, 2021
.Dt AIO 4
.Os
.Sh NAME
@ -215,10 +215,12 @@ as described in
.Xr aio_cancel 2 ,
.Xr aio_error 2 ,
.Xr aio_read 2 ,
.Xr aio_readv 2 ,
.Xr aio_return 2 ,
.Xr aio_suspend 2 ,
.Xr aio_waitcomplete 2 ,
.Xr aio_write 2 ,
.Xr aio_writev 2 ,
.Xr lio_listio 2 ,
.Xr sigevent 3 ,
.Xr sysctl 8

2
sys/bsm/audit_kevents.h
View File

@ -660,6 +660,8 @@
#define AUE_REALPATHAT 43264 /* FreeBSD-specific. */
#define AUE_CLOSERANGE 43265 /* FreeBSD-specific. */
#define AUE_SPECIALFD 43266 /* FreeBSD-specific. */
#define AUE_AIO_WRITEV 43267 /* FreeBSD-specific. */
#define AUE_AIO_READV 43268 /* FreeBSD-specific. */
/*
* Darwin BSM uses a number of AUE_O_* definitions, which are aliased to the

2
sys/compat/freebsd32/freebsd32_misc.c
View File

@ -1070,7 +1070,7 @@ freebsd32_ptrace(struct thread *td, struct freebsd32_ptrace_args *uap)
return (error);
}
static int
int
freebsd32_copyinuio(struct iovec32 *iovp, u_int iovcnt, struct uio **uiop)
{
struct iovec32 iov32;

2
sys/compat/freebsd32/freebsd32_util.h
View File

@ -116,6 +116,8 @@ int freebsd32_copyout_strings(struct image_params *imgp,
uintptr_t *stack_base);
int freebsd32_copyiniov(struct iovec32 *iovp, u_int iovcnt,
struct iovec **iov, int error);
int freebsd32_copyinuio(struct iovec32 *iovp, u_int iovcnt,
struct uio **uiop);
void freebsd32_rusage_out(const struct rusage *s, struct rusage32 *s32);
struct image_args;

6
sys/compat/freebsd32/syscalls.master
View File

@ -493,8 +493,10 @@
257 AUE_LIO_LISTIO STD { int freebsd32_lio_listio(int mode, \
struct aiocb32 * const *acb_list, \
int nent, struct sigevent32 *sig); }
258 AUE_NULL UNIMPL nosys
259 AUE_NULL UNIMPL nosys
258 AUE_AIO_WRITEV STD { int freebsd32_aio_writev( \
struct aiocb32 *aiocbp); }
259 AUE_AIO_READV STD { int freebsd32_aio_readv( \
struct aiocb32 *aiocbp); }
260 AUE_NULL UNIMPL nosys
261 AUE_NULL UNIMPL nosys
262 AUE_NULL UNIMPL nosys

2
sys/kern/capabilities.conf
View File

@ -100,6 +100,8 @@ aio_return
aio_suspend
aio_waitcomplete
aio_write
aio_writev
aio_readv
##
## audit(2) is a global operation, submitting to the global trail, but it is

35
sys/kern/sys_socket.c
View File

@ -600,9 +600,7 @@ soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
struct ucred *td_savedcred;
struct thread *td;
struct file *fp;
struct uio uio;
struct iovec iov;
size_t cnt, done;
size_t cnt, done, job_total_nbytes;
long ru_before;
int error, flags;
@ -614,16 +612,11 @@ soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
td_savedcred = td->td_ucred;
td->td_ucred = job->cred;
job_total_nbytes = job->uiop->uio_resid + job->aio_done;
done = job->aio_done;
cnt = job->uaiocb.aio_nbytes - done;
iov.iov_base = (void *)((uintptr_t)job->uaiocb.aio_buf + done);
iov.iov_len = cnt;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = 0;
uio.uio_resid = cnt;
uio.uio_segflg = UIO_USERSPACE;
uio.uio_td = td;
cnt = job->uiop->uio_resid;
job->uiop->uio_offset = 0;
job->uiop->uio_td = td;
flags = MSG_NBIO;
/*
@ -633,26 +626,26 @@ soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
*/
if (sb == &so->so_rcv) {
uio.uio_rw = UIO_READ;
ru_before = td->td_ru.ru_msgrcv;
#ifdef MAC
error = mac_socket_check_receive(fp->f_cred, so);
if (error == 0)
#endif
error = soreceive(so, NULL, &uio, NULL, NULL, &flags);
error = soreceive(so, NULL, job->uiop, NULL, NULL,
&flags);
if (td->td_ru.ru_msgrcv != ru_before)
job->msgrcv = 1;
} else {
if (!TAILQ_EMPTY(&sb->sb_aiojobq))
flags |= MSG_MORETOCOME;
uio.uio_rw = UIO_WRITE;
ru_before = td->td_ru.ru_msgsnd;
#ifdef MAC
error = mac_socket_check_send(fp->f_cred, so);
if (error == 0)
#endif
error = sosend(so, NULL, &uio, NULL, NULL, flags, td);
error = sosend(so, NULL, job->uiop, NULL, NULL, flags,
td);
if (td->td_ru.ru_msgsnd != ru_before)
job->msgsnd = 1;
if (error == EPIPE && (so->so_options & SO_NOSIGPIPE) == 0) {
@ -662,7 +655,7 @@ soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
}
}
done += cnt - uio.uio_resid;
done += cnt - job->uiop->uio_resid;
job->aio_done = done;
td->td_ucred = td_savedcred;
@ -676,7 +669,7 @@ soaio_process_job(struct socket *so, struct sockbuf *sb, struct kaiocb *job)
* been made, requeue this request at the head of the
* queue to try again when the socket is ready.
*/
MPASS(done != job->uaiocb.aio_nbytes);
MPASS(done != job_total_nbytes);
SOCKBUF_LOCK(sb);
if (done == 0 || !(so->so_state & SS_NBIO)) {
empty_results++;
@ -782,10 +775,10 @@ soo_aio_cancel(struct kaiocb *job)
so = job->fd_file->f_data;
opcode = job->uaiocb.aio_lio_opcode;
if (opcode == LIO_READ)
if (opcode == LIO_READ || opcode == LIO_READV)
sb = &so->so_rcv;
else {
MPASS(opcode == LIO_WRITE);
MPASS(opcode == LIO_WRITE || opcode == LIO_WRITEV);
sb = &so->so_snd;
}
@ -817,9 +810,11 @@ soo_aio_queue(struct file *fp, struct kaiocb *job)
switch (job->uaiocb.aio_lio_opcode) {
case LIO_READ:
case LIO_READV:
sb = &so->so_rcv;
break;
case LIO_WRITE:
case LIO_WRITEV:
sb = &so->so_snd;
break;
default:

12
sys/kern/syscalls.master
View File

@ -1477,7 +1477,17 @@
_In_opt_ struct sigevent *sig
);
}
258-271 AUE_NULL UNIMPL nosys
258 AUE_AIO_WRITEV STD {
int aio_writev(
_Inout_ struct aiocb *aiocbp
);
}
259 AUE_AIO_READV STD {
int aio_readv(
_Inout_ struct aiocb *aiocbp
);
}
260-271 AUE_NULL UNIMPL nosys
272 AUE_O_GETDENTS COMPAT11 {
int getdents(
int fd,

501
sys/kern/vfs_aio.c
View File

@ -292,7 +292,7 @@ struct kaioinfo {
* Different ABIs provide their own operations.
*/
struct aiocb_ops {
int (*aio_copyin)(struct aiocb *ujob, struct aiocb *kjob);
int (*aio_copyin)(struct aiocb *ujob, struct kaiocb *kjob, int ty);
long (*fetch_status)(struct aiocb *ujob);
long (*fetch_error)(struct aiocb *ujob);
int (*store_status)(struct aiocb *ujob, long status);
@ -307,6 +307,7 @@ static struct mtx aio_job_mtx;
static TAILQ_HEAD(,kaiocb) aio_jobs; /* (c) Async job list */
static struct unrhdr *aiod_unr;
static void aio_biocleanup(struct bio *bp);
void aio_init_aioinfo(struct proc *p);
static int aio_onceonly(void);
static int aio_free_entry(struct kaiocb *job);
@ -559,6 +560,8 @@ aio_free_entry(struct kaiocb *job)
if (job->fd_file)
fdrop(job->fd_file, curthread);
crfree(job->cred);
if (job->uiop != &job->uio)
free(job->uiop, M_IOV);
uma_zfree(aiocb_zone, job);
AIO_LOCK(ki);
@ -754,36 +757,29 @@ aio_process_rw(struct kaiocb *job)
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;
int error, opcode;
KASSERT(job->uaiocb.aio_lio_opcode == LIO_READ ||
job->uaiocb.aio_lio_opcode == LIO_WRITE,
job->uaiocb.aio_lio_opcode == LIO_READV ||
job->uaiocb.aio_lio_opcode == LIO_WRITE ||
job->uaiocb.aio_lio_opcode == LIO_WRITEV,
("%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;
job->uiop->uio_td = td;
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;
opcode = job->uaiocb.aio_lio_opcode;
cnt = job->uiop->uio_resid;
msgrcv_st = td->td_ru.ru_msgrcv;
msgsnd_st = td->td_ru.ru_msgsnd;
@ -794,17 +790,16 @@ aio_process_rw(struct kaiocb *job)
* 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)
if (opcode == LIO_READ || opcode == LIO_READV) {
if (job->uiop->uio_resid == 0)
error = 0;
else
error = fo_read(fp, &auio, fp->f_cred, FOF_OFFSET, td);
error = fo_read(fp, job->uiop, 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);
error = fo_write(fp, job->uiop, fp->f_cred, FOF_OFFSET, td);
}
msgrcv_end = td->td_ru.ru_msgrcv;
msgsnd_end = td->td_ru.ru_msgsnd;
@ -816,17 +811,18 @@ aio_process_rw(struct kaiocb *job)
job->inblock = inblock_end - inblock_st;
job->outblock = oublock_end - oublock_st;
if ((error) && (auio.uio_resid != cnt)) {
if (error != 0 && job->uiop->uio_resid != cnt) {
if (error == ERESTART || error == EINTR || error == EWOULDBLOCK)
error = 0;
if ((error == EPIPE) && (cb->aio_lio_opcode == LIO_WRITE)) {
if (error == EPIPE &&
(opcode == LIO_WRITE || opcode == LIO_WRITEV)) {
PROC_LOCK(job->userproc);
kern_psignal(job->userproc, SIGPIPE);
PROC_UNLOCK(job->userproc);
}
}
cnt -= auio.uio_resid;
cnt -= job->uiop->uio_resid;
td->td_ucred = td_savedcred;
if (error)
aio_complete(job, -1, error);
@ -1210,21 +1206,23 @@ 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;
struct vm_page **pages;
int error, npages, poff, ref;
struct bio **bios = NULL;
off_t offset;
int bio_cmd, error, i, iovcnt, opcode, poff, ref;
vm_prot_t prot;
bool use_unmapped;
cb = &job->uaiocb;
fp = job->fd_file;
opcode = cb->aio_lio_opcode;
if (!(cb->aio_lio_opcode == LIO_WRITE ||
cb->aio_lio_opcode == LIO_READ))
if (!(opcode == LIO_WRITE || opcode == LIO_WRITEV ||
opcode == LIO_READ || opcode == LIO_READV))
return (-1);
if (fp == NULL || fp->f_type != DTYPE_VNODE)
return (-1);
@ -1234,8 +1232,21 @@ aio_qbio(struct proc *p, struct kaiocb *job)
return (-1);
if (vp->v_bufobj.bo_bsize == 0)
return (-1);
if (cb->aio_nbytes % vp->v_bufobj.bo_bsize)
bio_cmd = opcode == LIO_WRITE || opcode == LIO_WRITEV ? BIO_WRITE :
BIO_READ;
iovcnt = job->uiop->uio_iovcnt;
if (iovcnt > max_buf_aio)
return (-1);
for (i = 0; i < iovcnt; i++) {
if (job->uiop->uio_iov[i].iov_len % vp->v_bufobj.bo_bsize != 0)
return (-1);
if (job->uiop->uio_iov[i].iov_len > maxphys) {
error = -1;
return (-1);
}
}
offset = cb->aio_offset;
ref = 0;
csw = devvn_refthread(vp, &dev, &ref);
@ -1246,89 +1257,106 @@ aio_qbio(struct proc *p, struct kaiocb *job)
error = -1;
goto unref;
}
if (cb->aio_nbytes > dev->si_iosize_max) {
if (job->uiop->uio_resid > 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;
}
job->error = 0;
pbuf = NULL;
pages = malloc(sizeof(vm_page_t) * (atop(round_page(
cb->aio_nbytes)) + 1), M_TEMP, M_WAITOK | M_ZERO);
} else {
if (cb->aio_nbytes > maxphys) {
error = -1;
goto unref;
}
if (ki->kaio_buffer_count >= max_buf_aio) {
use_unmapped = (dev->si_flags & SI_UNMAPPED) && unmapped_buf_allowed;
if (!use_unmapped) {
AIO_LOCK(ki);
if (ki->kaio_buffer_count + iovcnt > max_buf_aio) {
AIO_UNLOCK(ki);
error = EAGAIN;
goto unref;
}
pbuf = uma_zalloc(pbuf_zone, M_WAITOK);
BUF_KERNPROC(pbuf);
AIO_LOCK(ki);
ki->kaio_buffer_count++;
ki->kaio_buffer_count += iovcnt;
AIO_UNLOCK(ki);
pages = pbuf->b_pages;
}
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 = job;
bp->bio_caller2 = pbuf;
bios = malloc(sizeof(struct bio *) * iovcnt, M_TEMP, M_WAITOK);
atomic_store_int(&job->nbio, iovcnt);
for (i = 0; i < iovcnt; i++) {
struct vm_page** pages;
struct bio *bp;
void *buf;
size_t nbytes;
int npages;
prot = VM_PROT_READ;
if (cb->aio_lio_opcode == LIO_READ)
prot |= VM_PROT_WRITE; /* Less backwards than it looks */
npages = vm_fault_quick_hold_pages(&curproc->p_vmspace->vm_map,
(vm_offset_t)cb->aio_buf, bp->bio_length, prot, pages,
atop(maxphys) + 1);
if (npages < 0) {
error = EFAULT;
goto doerror;
}
if (pbuf != NULL) {
pmap_qenter((vm_offset_t)pbuf->b_data, pages, npages);
bp->bio_data = pbuf->b_data + poff;
atomic_add_int(&num_buf_aio, 1);
pbuf->b_npages = npages;
} else {
bp->bio_ma = pages;
bp->bio_ma_n = npages;
bp->bio_ma_offset = poff;
bp->bio_data = unmapped_buf;
bp->bio_flags |= BIO_UNMAPPED;
atomic_add_int(&num_unmapped_aio, 1);
buf = job->uiop->uio_iov[i].iov_base;
nbytes = job->uiop->uio_iov[i].iov_len;
bios[i] = g_alloc_bio();
bp = bios[i];
poff = (vm_offset_t)buf & PAGE_MASK;
if (use_unmapped) {
pbuf = NULL;
pages = malloc(sizeof(vm_page_t) * (atop(round_page(
nbytes)) + 1), M_TEMP, M_WAITOK | M_ZERO);
} else {
pbuf = uma_zalloc(pbuf_zone, M_WAITOK);
BUF_KERNPROC(pbuf);
pages = pbuf->b_pages;
}
bp->bio_length = nbytes;
bp->bio_bcount = nbytes;
bp->bio_done = aio_biowakeup;
bp->bio_offset = offset;
bp->bio_cmd = bio_cmd;
bp->bio_dev = dev;
bp->bio_caller1 = job;
bp->bio_caller2 = pbuf;
prot = VM_PROT_READ;
if (opcode == LIO_READ || opcode == LIO_READV)
prot |= VM_PROT_WRITE; /* Less backwards than it looks */
npages = vm_fault_quick_hold_pages(&curproc->p_vmspace->vm_map,
(vm_offset_t)buf, bp->bio_length, prot, pages,
atop(maxphys) + 1);
if (npages < 0) {
if (pbuf != NULL)
uma_zfree(pbuf_zone, pbuf);
else
free(pages, M_TEMP);
error = EFAULT;
g_destroy_bio(bp);
i--;
goto destroy_bios;
}
if (pbuf != NULL) {
pmap_qenter((vm_offset_t)pbuf->b_data, pages, npages);
bp->bio_data = pbuf->b_data + poff;
pbuf->b_npages = npages;
atomic_add_int(&num_buf_aio, 1);
} else {
bp->bio_ma = pages;
bp->bio_ma_n = npages;
bp->bio_ma_offset = poff;
bp->bio_data = unmapped_buf;
bp->bio_flags |= BIO_UNMAPPED;
atomic_add_int(&num_unmapped_aio, 1);
}
offset += nbytes;
}
/* Perform transfer. */
csw->d_strategy(bp);
for (i = 0; i < iovcnt; i++)
csw->d_strategy(bios[i]);
free(bios, M_TEMP);
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);
} else {
free(pages, M_TEMP);
}
g_destroy_bio(bp);
destroy_bios:
for (; i >= 0; i--)
aio_biocleanup(bios[i]);
free(bios, M_TEMP);
unref:
dev_relthread(dev, ref);
return (error);
@ -1362,25 +1390,39 @@ convert_old_sigevent(struct osigevent *osig, struct sigevent *nsig)
}
static int
aiocb_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
aiocb_copyin_old_sigevent(struct aiocb *ujob, struct kaiocb *kjob,
int type __unused)
{
struct oaiocb *ojob;
struct aiocb *kcb = &kjob->uaiocb;
int error;
bzero(kjob, sizeof(struct aiocb));
error = copyin(ujob, kjob, sizeof(struct oaiocb));
bzero(kcb, sizeof(struct aiocb));
error = copyin(ujob, kcb, sizeof(struct oaiocb));
if (error)
return (error);
ojob = (struct oaiocb *)kjob;
return (convert_old_sigevent(&ojob->aio_sigevent, &kjob->aio_sigevent));
/* No need to copyin aio_iov, because it did not exist in FreeBSD 6 */
ojob = (struct oaiocb *)kcb;
return (convert_old_sigevent(&ojob->aio_sigevent, &kcb->aio_sigevent));
}
#endif
static int
aiocb_copyin(struct aiocb *ujob, struct aiocb *kjob)
aiocb_copyin(struct aiocb *ujob, struct kaiocb *kjob, int type)
{
struct aiocb *kcb = &kjob->uaiocb;
int error;
return (copyin(ujob, kjob, sizeof(struct aiocb)));
error = copyin(ujob, kcb, sizeof(struct aiocb));
if (error)
return (error);
if (type == LIO_READV || type == LIO_WRITEV) {
/* malloc a uio and copy in the iovec */
error = copyinuio(__DEVOLATILE(struct iovec*, kcb->aio_iov),
kcb->aio_iovcnt, &kjob->uiop);
}
return (error);
}
static long
@ -1456,7 +1498,7 @@ 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 file *fp = NULL;
struct kaiocb *job;
struct kaioinfo *ki;
struct kevent kev;
@ -1477,39 +1519,35 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
if (num_queue_count >= max_queue_count ||
ki->kaio_count >= max_aio_queue_per_proc) {
ops->store_error(ujob, EAGAIN);
return (EAGAIN);
error = EAGAIN;
goto err1;
}
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);
}
error = ops->aio_copyin(ujob, job, type);
if (error)
goto err2;
if (job->uaiocb.aio_nbytes > IOSIZE_MAX) {
uma_zfree(aiocb_zone, job);
return (EINVAL);
error = EINVAL;
goto err2;
}
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);
error = EINVAL;
goto err2;
}
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);
error = EINVAL;
goto err2;
}
ksiginfo_init(&job->ksi);
@ -1533,16 +1571,17 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
fd = job->uaiocb.aio_fildes;
switch (opcode) {
case LIO_WRITE:
case LIO_WRITEV:
error = fget_write(td, fd, &cap_pwrite_rights, &fp);
break;
case LIO_READ:
case LIO_READV:
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);
@ -1550,22 +1589,20 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
default:
error = EINVAL;
}
if (error) {
uma_zfree(aiocb_zone, job);
ops->store_error(ujob, error);
return (error);
}
if (error)
goto err3;
if (opcode == LIO_SYNC && fp->f_vnode == NULL) {
error = EINVAL;
goto aqueue_fail;
goto err3;
}
if ((opcode == LIO_READ || opcode == LIO_WRITE) &&
if ((opcode == LIO_READ || opcode == LIO_READV ||
opcode == LIO_WRITE || opcode == LIO_WRITEV) &&
job->uaiocb.aio_offset < 0 &&
(fp->f_vnode == NULL || fp->f_vnode->v_type != VCHR)) {
error = EINVAL;
goto aqueue_fail;
goto err3;
}
job->fd_file = fp;
@ -1577,12 +1614,13 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
error = ops->store_kernelinfo(ujob, jid);
if (error) {
error = EINVAL;
goto aqueue_fail;
goto err3;
}
job->uaiocb._aiocb_private.kernelinfo = (void *)(intptr_t)jid;
if (opcode == LIO_NOP) {
fdrop(fp, td);
MPASS(job->uiop == &job->uio || job->uiop == NULL);
uma_zfree(aiocb_zone, job);
return (0);
}
@ -1592,7 +1630,7 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
evflags = job->uaiocb.aio_sigevent.sigev_notify_kevent_flags;
if ((evflags & ~(EV_CLEAR | EV_DISPATCH | EV_ONESHOT)) != 0) {
error = EINVAL;
goto aqueue_fail;
goto err3;
}
kqfd = job->uaiocb.aio_sigevent.sigev_notify_kqueue;
memset(&kev, 0, sizeof(kev));
@ -1603,7 +1641,7 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
kev.udata = job->uaiocb.aio_sigevent.sigev_value.sival_ptr;
error = kqfd_register(kqfd, &kev, td, M_WAITOK);
if (error)
goto aqueue_fail;
goto err3;
no_kqueue:
@ -1614,6 +1652,39 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
job->jobflags = KAIOCB_QUEUEING;
job->lio = lj;
switch (opcode) {
case LIO_READV:
case LIO_WRITEV:
/* Use the uio copied in by aio_copyin */
MPASS(job->uiop != &job->uio && job->uiop != NULL);
break;
case LIO_READ:
case LIO_WRITE:
/* Setup the inline uio */
job->iov[0].iov_base = (void *)(uintptr_t)job->uaiocb.aio_buf;
job->iov[0].iov_len = job->uaiocb.aio_nbytes;
job->uio.uio_iov = job->iov;
job->uio.uio_iovcnt = 1;
job->uio.uio_resid = job->uaiocb.aio_nbytes;
job->uio.uio_segflg = UIO_USERSPACE;
/* FALLTHROUGH */
default:
job->uiop = &job->uio;
break;
}
switch (opcode) {
case LIO_READ:
case LIO_READV:
job->uiop->uio_rw = UIO_READ;
break;
case LIO_WRITE:
case LIO_WRITEV:
job->uiop->uio_rw = UIO_WRITE;
break;
}
job->uiop->uio_offset = job->uaiocb.aio_offset;
job->uiop->uio_td = td;
if (opcode == LIO_MLOCK) {
aio_schedule(job, aio_process_mlock);
error = 0;
@ -1622,7 +1693,7 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
else
error = fo_aio_queue(fp, job);
if (error)
goto aqueue_fail;
goto err3;
AIO_LOCK(ki);
job->jobflags &= ~KAIOCB_QUEUEING;
@ -1643,11 +1714,15 @@ aio_aqueue(struct thread *td, struct aiocb *ujob, struct aioliojob *lj,
AIO_UNLOCK(ki);
return (0);
aqueue_fail:
knlist_delete(&job->klist, curthread, 0);
err3:
if (fp)
fdrop(fp, td);
knlist_delete(&job->klist, curthread, 0);
err2:
if (job->uiop != &job->uio)
free(job->uiop, M_IOV);
uma_zfree(aiocb_zone, job);
err1:
ops->store_error(ujob, error);
return (error);
}
@ -1723,7 +1798,9 @@ aio_queue_file(struct file *fp, struct kaiocb *job)
switch (job->uaiocb.aio_lio_opcode) {
case LIO_READ:
case LIO_READV:
case LIO_WRITE:
case LIO_WRITEV:
aio_schedule(job, aio_process_rw);
error = 0;
break;
@ -2097,6 +2174,13 @@ sys_aio_read(struct thread *td, struct aio_read_args *uap)
return (aio_aqueue(td, uap->aiocbp, NULL, LIO_READ, &aiocb_ops));
}
int
sys_aio_readv(struct thread *td, struct aio_readv_args *uap)
{
return (aio_aqueue(td, uap->aiocbp, NULL, LIO_READV, &aiocb_ops));
}
/* syscall - asynchronous write to a file (REALTIME) */
#ifdef COMPAT_FREEBSD6
int
@ -2115,6 +2199,13 @@ 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_writev(struct thread *td, struct aio_writev_args *uap)
{
return (aio_aqueue(td, uap->aiocbp, NULL, LIO_WRITEV, &aiocb_ops));
}
int
sys_aio_mlock(struct thread *td, struct aio_mlock_args *uap)
{
@ -2337,13 +2428,11 @@ sys_lio_listio(struct thread *td, struct lio_listio_args *uap)
}
static void
aio_biowakeup(struct bio *bp)
aio_biocleanup(struct bio *bp)
{
struct kaiocb *job = (struct kaiocb *)bp->bio_caller1;
struct kaioinfo *ki;
struct buf *pbuf = (struct buf*)bp->bio_caller2;
size_t nbytes;
int error, nblks;
struct buf *pbuf = (struct buf *)bp->bio_caller2;
/* Release mapping into kernel space. */
if (pbuf != NULL) {
@ -2362,25 +2451,49 @@ aio_biowakeup(struct bio *bp)
free(bp->bio_ma, M_TEMP);
atomic_subtract_int(&num_unmapped_aio, 1);
}
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);
}
static void
aio_biowakeup(struct bio *bp)
{
struct kaiocb *job = (struct kaiocb *)bp->bio_caller1;
size_t nbytes;
long bcount = bp->bio_bcount;
long resid = bp->bio_resid;
int error, opcode, nblks;
int bio_error = bp->bio_error;
uint16_t flags = bp->bio_flags;
opcode = job->uaiocb.aio_lio_opcode;
aio_biocleanup(bp);
nbytes =bcount - resid;
atomic_add_acq_long(&job->nbytes, nbytes);
nblks = btodb(nbytes);
error = 0;
/*
* If multiple bios experienced an error, the job will reflect the
* error of whichever failed bio completed last.
*/
if (flags & BIO_ERROR)
atomic_set_int(&job->error, bio_error);
if (opcode == LIO_WRITE || opcode == LIO_WRITEV)
atomic_add_int(&job->outblock, nblks);
else
atomic_add_int(&job->inblock, nblks);
atomic_subtract_int(&job->nbio, 1);
if (atomic_load_int(&job->nbio) == 0) {
if (atomic_load_int(&job->error))
aio_complete(job, -1, job->error);
else
aio_complete(job, atomic_load_long(&job->nbytes), 0);
}
}
/* syscall - wait for the next completion of an aio request */
static int
kern_aio_waitcomplete(struct thread *td, struct aiocb **ujobp,
@ -2614,8 +2727,8 @@ typedef struct oaiocb32 {
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 */
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 */
@ -2652,49 +2765,67 @@ convert_old_sigevent32(struct osigevent32 *osig, struct sigevent *nsig)
}
static int
aiocb32_copyin_old_sigevent(struct aiocb *ujob, struct aiocb *kjob)
aiocb32_copyin_old_sigevent(struct aiocb *ujob, struct kaiocb *kjob,
int type __unused)
{
struct oaiocb32 job32;
struct aiocb *kcb = &kjob->uaiocb;
int error;
bzero(kjob, sizeof(struct aiocb));
bzero(kcb, 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);
/* No need to copyin aio_iov, because it did not exist in FreeBSD 6 */
CP(job32, *kcb, aio_fildes);
CP(job32, *kcb, aio_offset);
PTRIN_CP(job32, *kcb, aio_buf);
CP(job32, *kcb, aio_nbytes);
CP(job32, *kcb, aio_lio_opcode);
CP(job32, *kcb, aio_reqprio);
CP(job32, *kcb, _aiocb_private.status);
CP(job32, *kcb, _aiocb_private.error);
PTRIN_CP(job32, *kcb, _aiocb_private.kernelinfo);
return (convert_old_sigevent32(&job32.aio_sigevent,
&kjob->aio_sigevent));
&kcb->aio_sigevent));
}
#endif
static int
aiocb32_copyin(struct aiocb *ujob, struct aiocb *kjob)
aiocb32_copyin(struct aiocb *ujob, struct kaiocb *kjob, int type)
{
struct aiocb32 job32;
struct aiocb *kcb = &kjob->uaiocb;
struct iovec32 *iov32;
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));
CP(job32, *kcb, aio_fildes);
CP(job32, *kcb, aio_offset);
CP(job32, *kcb, aio_lio_opcode);
if (type == LIO_READV || type == LIO_WRITEV) {
iov32 = PTRIN(job32.aio_iov);
CP(job32, *kcb, aio_iovcnt);
/* malloc a uio and copy in the iovec */
error = freebsd32_copyinuio(iov32,
kcb->aio_iovcnt, &kjob->uiop);
if (error)
return (error);
} else {
PTRIN_CP(job32, *kcb, aio_buf);
CP(job32, *kcb, aio_nbytes);
}
CP(job32, *kcb, aio_reqprio);
CP(job32, *kcb, _aiocb_private.status);
CP(job32, *kcb, _aiocb_private.error);
PTRIN_CP(job32, *kcb, _aiocb_private.kernelinfo);
error = convert_sigevent32(&job32.aio_sigevent, &kcb->aio_sigevent);
return (error);
}
static long
@ -2840,6 +2971,14 @@ freebsd32_aio_read(struct thread *td, struct freebsd32_aio_read_args *uap)
&aiocb32_ops));
}
int
freebsd32_aio_readv(struct thread *td, struct freebsd32_aio_readv_args *uap)
{
return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_READV,
&aiocb32_ops));
}
#ifdef COMPAT_FREEBSD6
int
freebsd6_freebsd32_aio_write(struct thread *td,
@ -2859,6 +2998,14 @@ freebsd32_aio_write(struct thread *td, struct freebsd32_aio_write_args *uap)
&aiocb32_ops));
}
int
freebsd32_aio_writev(struct thread *td, struct freebsd32_aio_writev_args *uap)
{
return (aio_aqueue(td, (struct aiocb *)uap->aiocbp, NULL, LIO_WRITEV,
&aiocb32_ops));
}
int
freebsd32_aio_mlock(struct thread *td, struct freebsd32_aio_mlock_args *uap)
{

22
sys/sys/aio.h
View File

@ -27,6 +27,7 @@
#include <sys/queue.h>
#include <sys/event.h>
#include <sys/signalvar.h>
#include <sys/uio.h>
#endif
/*
@ -45,6 +46,8 @@
#ifdef _KERNEL
#define LIO_SYNC 0x3
#define LIO_MLOCK 0x4
#define LIO_WRITEV 0x5
#define LIO_READV 0x6
#endif
/*
@ -92,7 +95,7 @@ struct __aiocb_private {
typedef struct aiocb {
int aio_fildes; /* File descriptor */
off_t aio_offset; /* File offset for I/O */
volatile void *aio_buf; /* I/O buffer in process space */
volatile void *aio_buf; /* I/O buffer in process space */
size_t aio_nbytes; /* Number of bytes for I/O */
int __spare__[2];
void *__spare2__;
@ -102,6 +105,9 @@ typedef struct aiocb {
struct sigevent aio_sigevent; /* Signal to deliver */
} aiocb_t;
#define aio_iov aio_buf /* I/O scatter/gather list */
#define aio_iovcnt aio_nbytes /* Length of aio_iov */
#ifdef _KERNEL
typedef void aio_cancel_fn_t(struct kaiocb *);
@ -132,11 +138,19 @@ struct kaiocb {
struct aiocb *ujob; /* (*) pointer in userspace of aiocb */
struct knlist klist; /* (a) list of knotes */
struct aiocb uaiocb; /* (*) copy of user I/O control block */
struct uio uio; /* (*) storage for non-vectored uio */
struct iovec iov[1]; /* (*) storage for non-vectored uio */
struct uio *uiop; /* (*) Possibly malloced uio */
ksiginfo_t ksi; /* (a) realtime signal info */
uint64_t seqno; /* (*) job number */
aio_cancel_fn_t *cancel_fn; /* (a) backend cancel function */
aio_handle_fn_t *handle_fn; /* (c) backend handle function */
union { /* Backend-specific data fields */
struct { /* BIO backend */
int nbio; /* Number of remaining bios */
int error; /* Worst error of all bios */
long nbytes; /* Bytes completed so far */
};
struct { /* fsync() requests */
int pending; /* (a) number of pending I/O */
};
@ -202,11 +216,17 @@ __BEGIN_DECLS
* Asynchronously read from a file
*/
int aio_read(struct aiocb *);
#if __BSD_VISIBLE
int aio_readv(struct aiocb *);
#endif
/*
* Asynchronously write to file
*/
int aio_write(struct aiocb *);
#if __BSD_VISIBLE
int aio_writev(struct aiocb *);
#endif
/*
* List I/O Asynchronously/synchronously read/write to/from file

739
tests/sys/aio/aio_test.c
View File

@ -281,6 +281,47 @@ aio_write_test(struct aio_context *ac, completion comp, struct sigevent *sev)
atf_tc_fail("aio short write (%jd)", (intmax_t)len);
}
/*
* Perform a vectored I/O test of our initialized data buffer to the provided
* file descriptor.
*
* To vectorize the linear buffer, chop it up into two pieces of dissimilar
* size, and swap their offsets.
*/
static void
aio_writev_test(struct aio_context *ac, completion comp, struct sigevent *sev)
{
struct aiocb aio;
struct iovec iov[2];
size_t len0, len1;
ssize_t len;
bzero(&aio, sizeof(aio));
aio.aio_fildes = ac->ac_write_fd;
aio.aio_offset = 0;
len0 = ac->ac_buflen * 3 / 4;
len1 = ac->ac_buflen / 4;
iov[0].iov_base = ac->ac_buffer + len1;
iov[0].iov_len = len0;
iov[1].iov_base = ac->ac_buffer;
iov[1].iov_len = len1;
aio.aio_iov = iov;
aio.aio_iovcnt = 2;
if (sev)
aio.aio_sigevent = *sev;
if (aio_writev(&aio) < 0)
atf_tc_fail("aio_writev failed: %s", strerror(errno));
len = comp(&aio);
if (len < 0)
atf_tc_fail("aio failed: %s", strerror(errno));
if (len != ac->ac_buflen)
atf_tc_fail("aio short write (%jd)", (intmax_t)len);
}
/*
* Perform a simple read test of our initialized data buffer from the
* provided file descriptor.
@ -314,6 +355,43 @@ aio_read_test(struct aio_context *ac, completion comp, struct sigevent *sev)
atf_tc_fail("buffer mismatched");
}
static void
aio_readv_test(struct aio_context *ac, completion comp, struct sigevent *sev)
{
struct aiocb aio;
struct iovec iov[2];
size_t len0, len1;
ssize_t len;
bzero(ac->ac_buffer, ac->ac_buflen);
bzero(&aio, sizeof(aio));
aio.aio_fildes = ac->ac_read_fd;
aio.aio_offset = 0;
len0 = ac->ac_buflen * 3 / 4;
len1 = ac->ac_buflen / 4;
iov[0].iov_base = ac->ac_buffer + len1;
iov[0].iov_len = len0;
iov[1].iov_base = ac->ac_buffer;
iov[1].iov_len = len1;
aio.aio_iov = iov;
aio.aio_iovcnt = 2;
if (sev)
aio.aio_sigevent = *sev;
if (aio_readv(&aio) < 0)
atf_tc_fail("aio_read failed: %s", strerror(errno));
len = comp(&aio);
if (len < 0)
atf_tc_fail("aio failed: %s", strerror(errno));
ATF_REQUIRE_EQ_MSG(len, ac->ac_buflen,
"aio short read (%jd)", (intmax_t)len);
if (aio_test_buffer(ac->ac_buffer, ac->ac_buflen, ac->ac_seed) == 0)
atf_tc_fail("buffer mismatched");
}
/*
* Series of type-specific tests for AIO. For now, we just make sure we can
* issue a write and then a read to each type. We assume that once a write
@ -328,7 +406,7 @@ aio_read_test(struct aio_context *ac, completion comp, struct sigevent *sev)
#define FILE_PATHNAME "testfile"
static void
aio_file_test(completion comp, struct sigevent *sev)
aio_file_test(completion comp, struct sigevent *sev, bool vectored)
{
struct aio_context ac;
int fd;
@ -340,39 +418,44 @@ aio_file_test(completion comp, struct sigevent *sev)
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
aio_context_init(&ac, fd, fd, FILE_LEN);
aio_write_test(&ac, comp, sev);
aio_read_test(&ac, comp, sev);
if (vectored) {
aio_writev_test(&ac, comp, sev);
aio_readv_test(&ac, comp, sev);
} else {
aio_write_test(&ac, comp, sev);
aio_read_test(&ac, comp, sev);
}
close(fd);
}
ATF_TC_WITHOUT_HEAD(file_poll);
ATF_TC_BODY(file_poll, tc)
{
aio_file_test(poll, NULL);
aio_file_test(poll, NULL, false);
}
ATF_TC_WITHOUT_HEAD(file_signal);
ATF_TC_BODY(file_signal, tc)
{
aio_file_test(poll_signaled, setup_signal());
aio_file_test(poll_signaled, setup_signal(), false);
}
ATF_TC_WITHOUT_HEAD(file_suspend);
ATF_TC_BODY(file_suspend, tc)
{
aio_file_test(suspend, NULL);
aio_file_test(suspend, NULL, false);
}
ATF_TC_WITHOUT_HEAD(file_thread);
ATF_TC_BODY(file_thread, tc)
{
aio_file_test(poll_signaled, setup_thread());
aio_file_test(poll_signaled, setup_thread(), false);
}
ATF_TC_WITHOUT_HEAD(file_waitcomplete);
ATF_TC_BODY(file_waitcomplete, tc)
{
aio_file_test(waitcomplete, NULL);
aio_file_test(waitcomplete, NULL, false);
}
#define FIFO_LEN 256
@ -446,7 +529,7 @@ ATF_TC_BODY(fifo_waitcomplete, tc)
#define UNIX_SOCKETPAIR_LEN 256
static void
aio_unix_socketpair_test(completion comp, struct sigevent *sev)
aio_unix_socketpair_test(completion comp, struct sigevent *sev, bool vectored)
{
struct aio_context ac;
struct rusage ru_before, ru_after;
@ -460,14 +543,16 @@ aio_unix_socketpair_test(completion comp, struct sigevent *sev)
aio_context_init(&ac, sockets[0], sockets[1], UNIX_SOCKETPAIR_LEN);
ATF_REQUIRE_MSG(getrusage(RUSAGE_SELF, &ru_before) != -1,
"getrusage failed: %s", strerror(errno));
aio_write_test(&ac, comp, sev);
if (vectored) {
aio_writev_test(&ac, comp, sev);
aio_readv_test(&ac, comp, sev);
} else {
aio_write_test(&ac, comp, sev);
aio_read_test(&ac, comp, sev);
}
ATF_REQUIRE_MSG(getrusage(RUSAGE_SELF, &ru_after) != -1,
"getrusage failed: %s", strerror(errno));
ATF_REQUIRE(ru_after.ru_msgsnd == ru_before.ru_msgsnd + 1);
ru_before = ru_after;
aio_read_test(&ac, comp, sev);
ATF_REQUIRE_MSG(getrusage(RUSAGE_SELF, &ru_after) != -1,
"getrusage failed: %s", strerror(errno));
ATF_REQUIRE(ru_after.ru_msgrcv == ru_before.ru_msgrcv + 1);
close(sockets[0]);
@ -477,31 +562,31 @@ aio_unix_socketpair_test(completion comp, struct sigevent *sev)
ATF_TC_WITHOUT_HEAD(socket_poll);
ATF_TC_BODY(socket_poll, tc)
{
aio_unix_socketpair_test(poll, NULL);
aio_unix_socketpair_test(poll, NULL, false);
}
ATF_TC_WITHOUT_HEAD(socket_signal);
ATF_TC_BODY(socket_signal, tc)
{
aio_unix_socketpair_test(poll_signaled, setup_signal());
aio_unix_socketpair_test(poll_signaled, setup_signal(), false);
}
ATF_TC_WITHOUT_HEAD(socket_suspend);
ATF_TC_BODY(socket_suspend, tc)
{
aio_unix_socketpair_test(suspend, NULL);
aio_unix_socketpair_test(suspend, NULL, false);
}
ATF_TC_WITHOUT_HEAD(socket_thread);
ATF_TC_BODY(socket_thread, tc)
{
aio_unix_socketpair_test(poll_signaled, setup_thread());
aio_unix_socketpair_test(poll_signaled, setup_thread(), false);
}
ATF_TC_WITHOUT_HEAD(socket_waitcomplete);
ATF_TC_BODY(socket_waitcomplete, tc)
{
aio_unix_socketpair_test(waitcomplete, NULL);
aio_unix_socketpair_test(waitcomplete, NULL, false);
}
struct aio_pty_arg {
@ -629,40 +714,11 @@ ATF_TC_BODY(pipe_waitcomplete, tc)
#define MD_LEN GLOBAL_MAX
#define MDUNIT_LINK "mdunit_link"
static void
aio_md_cleanup(void)
{
struct md_ioctl mdio;
int mdctl_fd, error, n, unit;
char buf[80];
mdctl_fd = open("/dev/" MDCTL_NAME, O_RDWR, 0);
ATF_REQUIRE(mdctl_fd >= 0);
n = readlink(MDUNIT_LINK, buf, sizeof(buf));
if (n > 0) {
if (sscanf(buf, "%d", &unit) == 1 && unit >= 0) {
bzero(&mdio, sizeof(mdio));
mdio.md_version = MDIOVERSION;
mdio.md_unit = unit;
if (ioctl(mdctl_fd, MDIOCDETACH, &mdio) == -1) {
error = errno;
close(mdctl_fd);
errno = error;
atf_tc_fail("ioctl MDIOCDETACH failed: %s",
strerror(errno));
}
}
}
close(mdctl_fd);
}
static void
aio_md_test(completion comp, struct sigevent *sev)
static int
aio_md_setup(void)
{
int error, fd, mdctl_fd, unit;
char pathname[PATH_MAX];
struct aio_context ac;
struct md_ioctl mdio;
char buf[80];
@ -695,9 +751,52 @@ aio_md_test(completion comp, struct sigevent *sev)
ATF_REQUIRE_MSG(fd != -1,
"opening %s failed: %s", pathname, strerror(errno));
return (fd);
}
static void
aio_md_cleanup(void)
{
struct md_ioctl mdio;
int mdctl_fd, error, n, unit;
char buf[80];
mdctl_fd = open("/dev/" MDCTL_NAME, O_RDWR, 0);
ATF_REQUIRE(mdctl_fd >= 0);
n = readlink(MDUNIT_LINK, buf, sizeof(buf));
if (n > 0) {
if (sscanf(buf, "%d", &unit) == 1 && unit >= 0) {
bzero(&mdio, sizeof(mdio));
mdio.md_version = MDIOVERSION;
mdio.md_unit = unit;
if (ioctl(mdctl_fd, MDIOCDETACH, &mdio) == -1) {
error = errno;
close(mdctl_fd);
errno = error;
atf_tc_fail("ioctl MDIOCDETACH failed: %s",
strerror(errno));
}
}
}
close(mdctl_fd);
}
static void
aio_md_test(completion comp, struct sigevent *sev, bool vectored)
{
struct aio_context ac;
int fd;
fd = aio_md_setup();
aio_context_init(&ac, fd, fd, MD_LEN);
aio_write_test(&ac, comp, sev);
aio_read_test(&ac, comp, sev);
if (vectored) {
aio_writev_test(&ac, comp, sev);
aio_readv_test(&ac, comp, sev);
} else {
aio_write_test(&ac, comp, sev);
aio_read_test(&ac, comp, sev);
}
close(fd);
}
@ -710,7 +809,7 @@ ATF_TC_HEAD(md_poll, tc)
}
ATF_TC_BODY(md_poll, tc)
{
aio_md_test(poll, NULL);
aio_md_test(poll, NULL, false);
}
ATF_TC_CLEANUP(md_poll, tc)
{
@ -725,7 +824,7 @@ ATF_TC_HEAD(md_signal, tc)
}
ATF_TC_BODY(md_signal, tc)
{
aio_md_test(poll_signaled, setup_signal());
aio_md_test(poll_signaled, setup_signal(), false);
}
ATF_TC_CLEANUP(md_signal, tc)
{
@ -740,7 +839,7 @@ ATF_TC_HEAD(md_suspend, tc)
}
ATF_TC_BODY(md_suspend, tc)
{
aio_md_test(suspend, NULL);
aio_md_test(suspend, NULL, false);
}
ATF_TC_CLEANUP(md_suspend, tc)
{
@ -755,7 +854,7 @@ ATF_TC_HEAD(md_thread, tc)
}
ATF_TC_BODY(md_thread, tc)
{
aio_md_test(poll_signaled, setup_thread());
aio_md_test(poll_signaled, setup_thread(), false);
}
ATF_TC_CLEANUP(md_thread, tc)
{
@ -770,13 +869,89 @@ ATF_TC_HEAD(md_waitcomplete, tc)
}
ATF_TC_BODY(md_waitcomplete, tc)
{
aio_md_test(waitcomplete, NULL);
aio_md_test(waitcomplete, NULL, false);
}
ATF_TC_CLEANUP(md_waitcomplete, tc)
{
aio_md_cleanup();
}
#define ZVOL_VDEV_PATHNAME "test_vdev"
#define POOL_SIZE (1 << 28) /* 256 MB */
#define ZVOL_SIZE "64m"
#define POOL_NAME "aio_testpool"
#define ZVOL_NAME "aio_testvol"
static int
aio_zvol_setup(void)
{
FILE *pidfile;
int fd;
pid_t pid;
char pool_name[80];
char cmd[160];
char zvol_name[160];
char devname[160];
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_KERNEL_MODULE("zfs");
fd = open(ZVOL_VDEV_PATHNAME, O_RDWR | O_CREAT, 0600);
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
ATF_REQUIRE_EQ_MSG(0,
ftruncate(fd, POOL_SIZE), "ftruncate failed: %s", strerror(errno));
close(fd);
pid = getpid();
pidfile = fopen("pidfile", "w");
ATF_REQUIRE_MSG(NULL != pidfile, "fopen: %s", strerror(errno));
fprintf(pidfile, "%d", pid);
fclose(pidfile);
snprintf(pool_name, sizeof(pool_name), POOL_NAME ".%d", pid);
snprintf(zvol_name, sizeof(zvol_name), "%s/" ZVOL_NAME, pool_name);
snprintf(cmd, sizeof(cmd), "zpool create %s $PWD/" ZVOL_VDEV_PATHNAME,
pool_name);
ATF_REQUIRE_EQ_MSG(0, system(cmd),
"zpool create failed: %s", strerror(errno));
snprintf(cmd, sizeof(cmd),
"zfs create -o volblocksize=8192 -o volmode=dev -V "
ZVOL_SIZE " %s", zvol_name);
ATF_REQUIRE_EQ_MSG(0, system(cmd),
"zfs create failed: %s", strerror(errno));
/*
* XXX Due to bug 251828, we need an extra "zfs set" here
* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251828
*/
snprintf(cmd, sizeof(cmd), "zfs set volmode=dev %s", zvol_name);
ATF_REQUIRE_EQ_MSG(0, system(cmd),
"zfs set failed: %s", strerror(errno));
snprintf(devname, sizeof(devname), "/dev/zvol/%s", zvol_name);
do {
fd = open(devname, O_RDWR);
} while (fd == -1 && errno == EINTR) ;
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
return (fd);
}
static void
aio_zvol_cleanup(void)
{
FILE *pidfile;
pid_t testpid;
char cmd[160];
pidfile = fopen("pidfile", "r");
ATF_REQUIRE_MSG(NULL != pidfile, "fopen: %s", strerror(errno));
ATF_REQUIRE_EQ(1, fscanf(pidfile, "%d", &testpid));
fclose(pidfile);
snprintf(cmd, sizeof(cmd), "zpool destroy " POOL_NAME ".%d", testpid);
system(cmd);
}
ATF_TC_WITHOUT_HEAD(aio_large_read_test);
ATF_TC_BODY(aio_large_read_test, tc)
{
@ -907,16 +1082,13 @@ ATF_TC_BODY(aio_socket_two_reads, tc)
close(s[0]);
}
/*
* This test ensures that aio_write() on a blocking socket of a "large"
* buffer does not return a short completion.
*/
ATF_TC_WITHOUT_HEAD(aio_socket_blocking_short_write);
ATF_TC_BODY(aio_socket_blocking_short_write, tc)
static void
aio_socket_blocking_short_write_test(bool vectored)
{
struct aiocb iocb, *iocbp;
struct iovec iov[2];
char *buffer[2];
ssize_t done;
ssize_t done, r;
int buffer_size, sb_size;
socklen_t len;
int s[2];
@ -954,9 +1126,21 @@ ATF_TC_BODY(aio_socket_blocking_short_write, tc)
memset(&iocb, 0, sizeof(iocb));
iocb.aio_fildes = s[1];
iocb.aio_buf = buffer[1];
iocb.aio_nbytes = buffer_size;
ATF_REQUIRE(aio_write(&iocb) == 0);
if (vectored) {
iov[0].iov_base = buffer[1];
iov[0].iov_len = buffer_size / 2 + 1;
iov[1].iov_base = buffer[1] + buffer_size / 2 + 1;
iov[1].iov_len = buffer_size / 2 - 1;
iocb.aio_iov = iov;
iocb.aio_iovcnt = 2;
r = aio_writev(&iocb);
ATF_CHECK_EQ_MSG(0, r, "aio_writev returned %zd", r);
} else {
iocb.aio_buf = buffer[1];
iocb.aio_nbytes = buffer_size;
r = aio_write(&iocb);
ATF_CHECK_EQ_MSG(0, r, "aio_writev returned %zd", r);
}
done = recv(s[0], buffer[0], buffer_size, MSG_WAITALL);
ATF_REQUIRE(done == buffer_size);
@ -971,6 +1155,26 @@ ATF_TC_BODY(aio_socket_blocking_short_write, tc)
close(s[0]);
}
/*
* This test ensures that aio_write() on a blocking socket of a "large"
* buffer does not return a short completion.
*/
ATF_TC_WITHOUT_HEAD(aio_socket_blocking_short_write);
ATF_TC_BODY(aio_socket_blocking_short_write, tc)
{
aio_socket_blocking_short_write_test(false);
}
/*
* Like aio_socket_blocking_short_write, but also tests that partially
* completed vectored sends can be retried correctly.
*/
ATF_TC_WITHOUT_HEAD(aio_socket_blocking_short_write_vectored);
ATF_TC_BODY(aio_socket_blocking_short_write_vectored, tc)
{
aio_socket_blocking_short_write_test(true);
}
/*
* This test verifies that cancelling a partially completed socket write
* returns a short write rather than ECANCELED.
@ -1155,6 +1359,395 @@ ATF_TC_BODY(aio_fsync_test, tc)
close(fd);
}
/*
* We shouldn't be able to DoS the system by setting iov_len to an insane
* value
*/
ATF_TC_WITHOUT_HEAD(aio_writev_dos_iov_len);
ATF_TC_BODY(aio_writev_dos_iov_len, tc)
{
struct aiocb aio;
const struct aiocb *const iocbs[] = {&aio};
const char *wbuf = "Hello, world!";
struct iovec iov[1];
ssize_t len, r;
int fd;
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
fd = open("testfile", O_RDWR | O_CREAT, 0600);
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
len = strlen(wbuf);
iov[0].iov_base = __DECONST(void*, wbuf);
iov[0].iov_len = 1 << 30;
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
aio.aio_iov = iov;
aio.aio_iovcnt = 1;
r = aio_writev(&aio);
ATF_CHECK_EQ_MSG(0, r, "aio_writev returned %zd", r);
ATF_REQUIRE_EQ(0, aio_suspend(iocbs, 1, NULL));
r = aio_return(&aio);
ATF_CHECK_EQ_MSG(-1, r, "aio_return returned %zd", r);
ATF_CHECK_MSG(errno == EFAULT || errno == EINVAL,
"aio_writev: %s", strerror(errno));
close(fd);
}
/*
* We shouldn't be able to DoS the system by setting aio_iovcnt to an insane
* value
*/
ATF_TC_WITHOUT_HEAD(aio_writev_dos_iovcnt);
ATF_TC_BODY(aio_writev_dos_iovcnt, tc)
{
struct aiocb aio;
const char *wbuf = "Hello, world!";
struct iovec iov[1];
ssize_t len;
int fd;
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
fd = open("testfile", O_RDWR | O_CREAT, 0600);
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
len = strlen(wbuf);
iov[0].iov_base = __DECONST(void*, wbuf);
iov[0].iov_len = len;
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
aio.aio_iov = iov;
aio.aio_iovcnt = 1 << 30;
ATF_REQUIRE_EQ(-1, aio_writev(&aio));
ATF_CHECK_EQ(EINVAL, errno);
close(fd);
}
ATF_TC_WITH_CLEANUP(aio_writev_efault);
ATF_TC_HEAD(aio_writev_efault, tc)
{
atf_tc_set_md_var(tc, "descr",
"Vectored AIO should gracefully handle invalid addresses");
atf_tc_set_md_var(tc, "require.user", "root");
}
ATF_TC_BODY(aio_writev_efault, tc)
{
struct aiocb aio;
ssize_t buflen;
char *buffer;
struct iovec iov[2];
long seed;
int fd;
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
fd = aio_md_setup();
seed = random();
buflen = 4096;
buffer = malloc(buflen);
aio_fill_buffer(buffer, buflen, seed);
iov[0].iov_base = buffer;
iov[0].iov_len = buflen;
iov[1].iov_base = (void*)-1; /* Invalid! */
iov[1].iov_len = buflen;
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
aio.aio_iov = iov;
aio.aio_iovcnt = nitems(iov);
ATF_REQUIRE_EQ(-1, aio_writev(&aio));
ATF_CHECK_EQ(EFAULT, errno);
close(fd);
}
ATF_TC_CLEANUP(aio_writev_efault, tc)
{
aio_md_cleanup();
}
ATF_TC_WITHOUT_HEAD(aio_writev_empty_file_poll);
ATF_TC_BODY(aio_writev_empty_file_poll, tc)
{
struct aiocb aio;
int fd;
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
fd = open("testfile", O_RDWR | O_CREAT, 0600);
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
aio.aio_iovcnt = 0;
ATF_REQUIRE_EQ(0, aio_writev(&aio));
ATF_REQUIRE_EQ(0, suspend(&aio));
close(fd);
}
ATF_TC_WITHOUT_HEAD(aio_writev_empty_file_signal);
ATF_TC_BODY(aio_writev_empty_file_signal, tc)
{
struct aiocb aio;
int fd;
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
fd = open("testfile", O_RDWR | O_CREAT, 0600);
ATF_REQUIRE_MSG(fd != -1, "open failed: %s", strerror(errno));
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
aio.aio_iovcnt = 0;
aio.aio_sigevent = *setup_signal();
ATF_REQUIRE_EQ(0, aio_writev(&aio));
ATF_REQUIRE_EQ(0, poll_signaled(&aio));
close(fd);
}
// aio_writev and aio_readv should still work even if the iovcnt is greater
// than the number of buffered AIO operations permitted per process.
ATF_TC_WITH_CLEANUP(vectored_big_iovcnt);
ATF_TC_HEAD(vectored_big_iovcnt, tc)
{
atf_tc_set_md_var(tc, "descr",
"Vectored AIO should still work even if the iovcnt is greater than "
"the number of buffered AIO operations permitted by the process");
atf_tc_set_md_var(tc, "require.user", "root");
}
ATF_TC_BODY(vectored_big_iovcnt, tc)
{
struct aiocb aio;
struct iovec *iov;
ssize_t len, buflen;
char *buffer;
const char *oid = "vfs.aio.max_buf_aio";
long seed;
int max_buf_aio;
int fd, i;
ssize_t sysctl_len = sizeof(max_buf_aio);
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
if (sysctlbyname(oid, &max_buf_aio, &sysctl_len, NULL, 0) == -1)
atf_libc_error(errno, "Failed to read %s", oid);
seed = random();
buflen = 512 * (max_buf_aio + 1);
buffer = malloc(buflen);
aio_fill_buffer(buffer, buflen, seed);
iov = calloc(max_buf_aio + 1, sizeof(struct iovec));
fd = aio_md_setup();
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
for (i = 0; i < max_buf_aio + 1; i++) {
iov[i].iov_base = &buffer[i * 512];
iov[i].iov_len = 512;
}
aio.aio_iov = iov;
aio.aio_iovcnt = max_buf_aio + 1;
if (aio_writev(&aio) < 0)
atf_tc_fail("aio_writev failed: %s", strerror(errno));
len = poll(&aio);
if (len < 0)
atf_tc_fail("aio failed: %s", strerror(errno));
if (len != buflen)
atf_tc_fail("aio short write (%jd)", (intmax_t)len);
bzero(&aio, sizeof(aio));
aio.aio_fildes = fd;
aio.aio_offset = 0;
aio.aio_iov = iov;
aio.aio_iovcnt = max_buf_aio + 1;
if (aio_readv(&aio) < 0)
atf_tc_fail("aio_readv failed: %s", strerror(errno));
len = poll(&aio);
if (len < 0)
atf_tc_fail("aio failed: %s", strerror(errno));
if (len != buflen)
atf_tc_fail("aio short read (%jd)", (intmax_t)len);
if (aio_test_buffer(buffer, buflen, seed) == 0)
atf_tc_fail("buffer mismatched");
close(fd);
}
ATF_TC_CLEANUP(vectored_big_iovcnt, tc)
{
aio_md_cleanup();
}
ATF_TC_WITHOUT_HEAD(vectored_file_poll);
ATF_TC_BODY(vectored_file_poll, tc)
{
aio_file_test(poll, NULL, true);
}
ATF_TC_WITH_CLEANUP(vectored_md_poll);
ATF_TC_HEAD(vectored_md_poll, tc)
{
atf_tc_set_md_var(tc, "require.user", "root");
}
ATF_TC_BODY(vectored_md_poll, tc)
{
aio_md_test(poll, NULL, true);
}
ATF_TC_CLEANUP(vectored_md_poll, tc)
{
aio_md_cleanup();
}
ATF_TC_WITHOUT_HEAD(vectored_socket_poll);
ATF_TC_BODY(vectored_socket_poll, tc)
{
aio_unix_socketpair_test(poll, NULL, true);
}
// aio_writev and aio_readv should still work even if the iov contains elements
// that aren't a multiple of the device's sector size, and even if the total
// amount if I/O _is_ a multiple of the device's sector size.
ATF_TC_WITH_CLEANUP(vectored_unaligned);
ATF_TC_HEAD(vectored_unaligned, tc)
{
atf_tc_set_md_var(tc, "descr",
"Vectored AIO should still work even if the iov contains elements "
"that aren't a multiple of the sector size.");
atf_tc_set_md_var(tc, "require.user", "root");
}
ATF_TC_BODY(vectored_unaligned, tc)
{
struct aio_context ac;
struct aiocb aio;
struct iovec iov[3];
ssize_t len, total_len;
int fd;
ATF_REQUIRE_KERNEL_MODULE("aio");
ATF_REQUIRE_UNSAFE_AIO();
/*
* Use a zvol with volmode=dev, so it will allow .d_write with
* unaligned uio. geom devices use physio, which doesn't allow that.
*/
fd = aio_zvol_setup();
aio_context_init(&ac, fd, fd, FILE_LEN);
/* Break the buffer into 3 parts:
* * A 4kB part, aligned to 4kB
* * Two other parts that add up to 4kB:
* - 256B
* - 4kB - 256B
*/
iov[0].iov_base = ac.ac_buffer;
iov[0].iov_len = 4096;
iov[1].iov_base = (void*)((uintptr_t)iov[0].iov_base + iov[0].iov_len);
iov[1].iov_len = 256;
iov[2].iov_base = (void*)((uintptr_t)iov[1].iov_base + iov[1].iov_len);
iov[2].iov_len = 4096 - iov[1].iov_len;
total_len = iov[0].iov_len + iov[1].iov_len + iov[2].iov_len;
bzero(&aio, sizeof(aio));
aio.aio_fildes = ac.ac_write_fd;
aio.aio_offset = 0;
aio.aio_iov = iov;
aio.aio_iovcnt = 3;
if (aio_writev(&aio) < 0)
atf_tc_fail("aio_writev failed: %s", strerror(errno));
len = poll(&aio);
if (len < 0)
atf_tc_fail("aio failed: %s", strerror(errno));
if (len != total_len)
atf_tc_fail("aio short write (%jd)", (intmax_t)len);
bzero(&aio, sizeof(aio));
aio.aio_fildes = ac.ac_read_fd;
aio.aio_offset = 0;
aio.aio_iov = iov;
aio.aio_iovcnt = 3;
if (aio_readv(&aio) < 0)
atf_tc_fail("aio_readv failed: %s", strerror(errno));
len = poll(&aio);
ATF_REQUIRE_MSG(aio_test_buffer(ac.ac_buffer, total_len,
ac.ac_seed) != 0, "aio_test_buffer: internal error");
close(fd);
}
ATF_TC_CLEANUP(vectored_unaligned, tc)
{
aio_zvol_cleanup();
}
static void
aio_zvol_test(completion comp, struct sigevent *sev, bool vectored)
{
struct aio_context ac;
int fd;
fd = aio_zvol_setup();
aio_context_init(&ac, fd, fd, MD_LEN);
if (vectored) {
aio_writev_test(&ac, comp, sev);
aio_readv_test(&ac, comp, sev);
} else {
aio_write_test(&ac, comp, sev);
aio_read_test(&ac, comp, sev);
}
close(fd);
}
/*
* Note that unlike md, the zvol is not a geom device, does not allow unmapped
* buffers, and does not use physio.
*/
ATF_TC_WITH_CLEANUP(vectored_zvol_poll);
ATF_TC_HEAD(vectored_zvol_poll, tc)
{
atf_tc_set_md_var(tc, "require.user", "root");
}
ATF_TC_BODY(vectored_zvol_poll, tc)
{
aio_zvol_test(poll, NULL, true);
}
ATF_TC_CLEANUP(vectored_zvol_poll, tc)
{
aio_zvol_cleanup();
}
ATF_TP_ADD_TCS(tp)
{
@ -1193,7 +1786,19 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, aio_large_read_test);
ATF_TP_ADD_TC(tp, aio_socket_two_reads);
ATF_TP_ADD_TC(tp, aio_socket_blocking_short_write);
ATF_TP_ADD_TC(tp, aio_socket_blocking_short_write_vectored);
ATF_TP_ADD_TC(tp, aio_socket_short_write_cancel);
ATF_TP_ADD_TC(tp, aio_writev_dos_iov_len);
ATF_TP_ADD_TC(tp, aio_writev_dos_iovcnt);
ATF_TP_ADD_TC(tp, aio_writev_efault);
ATF_TP_ADD_TC(tp, aio_writev_empty_file_poll);
ATF_TP_ADD_TC(tp, aio_writev_empty_file_signal);
ATF_TP_ADD_TC(tp, vectored_big_iovcnt);
ATF_TP_ADD_TC(tp, vectored_file_poll);
ATF_TP_ADD_TC(tp, vectored_md_poll);
ATF_TP_ADD_TC(tp, vectored_zvol_poll);
ATF_TP_ADD_TC(tp, vectored_unaligned);
ATF_TP_ADD_TC(tp, vectored_socket_poll);
return (atf_no_error());
}