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PIPE(2): Port to RTEMS

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This commit is contained in:
Kevin Kirspel
2016-12-21 11:01:28 -08:00
committed by Sebastian Huber
parent 6959face72
commit b1580fb039
6 changed files with 486 additions and 2 deletions
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271
freebsd/sys/kern/sys_pipe.c Normal file → Executable file
View File

@@ -131,6 +131,9 @@ __FBSDID("$FreeBSD$");
#include <vm/uma.h>
/* XXX */
#ifdef __rtems__
static
#endif /* __rtems__ */
int do_pipe(struct thread *td, int fildes[2], int flags);
/*
@@ -143,6 +146,7 @@ int do_pipe(struct thread *td, int fildes[2], int flags);
/*
* interfaces to the outside world
*/
#ifndef __rtems__
static fo_rdwr_t pipe_read;
static fo_rdwr_t pipe_write;
static fo_truncate_t pipe_truncate;
@@ -165,6 +169,39 @@ static struct fileops pipeops = {
.fo_chown = invfo_chown,
.fo_flags = DFLAG_PASSABLE
};
#else /* __rtems__ */
#define PIPE_NODIRECT
#define PRIBIO (0)
static int rtems_bsd_pipe_open(rtems_libio_t *iop, const char *path, int oflag, mode_t mode);
static int rtems_bsd_pipe_close(rtems_libio_t *iop);
static ssize_t rtems_bsd_pipe_read(rtems_libio_t *iop, void *buffer, size_t count);
static ssize_t rtems_bsd_pipe_write(rtems_libio_t *iop, const void *buffer, size_t count);
static int rtems_bsd_pipe_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer);
static int rtems_bsd_pipe_stat(const rtems_filesystem_location_info_t *loc, struct stat *buf);
static int rtems_bsd_pipe_fcntl(rtems_libio_t *iop, int cmd);
static int rtems_bsd_pipe_poll(rtems_libio_t *iop, int events);
int rtems_bsd_pipe_kqfilter(rtems_libio_t *iop, struct knote *kn);
static const rtems_filesystem_file_handlers_r pipeops = {
.open_h = rtems_bsd_pipe_open,
.close_h = rtems_bsd_pipe_close,
.read_h = rtems_bsd_pipe_read,
.write_h = rtems_bsd_pipe_write,
.ioctl_h = rtems_bsd_pipe_ioctl,
.lseek_h = rtems_filesystem_default_lseek,
.fstat_h = rtems_bsd_pipe_stat,
.ftruncate_h = rtems_filesystem_default_ftruncate,
.fsync_h = rtems_filesystem_default_fsync_or_fdatasync,
.fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync,
.fcntl_h = rtems_bsd_pipe_fcntl,
.poll_h = rtems_bsd_pipe_poll,
.kqfilter_h = rtems_bsd_pipe_kqfilter
};
long maxpipekva; /* Limit on pipe KVA */
#endif /* __rtems__ */
static void filt_pipedetach(struct knote *kn);
static int filt_piperead(struct knote *kn, long hint);
@@ -266,7 +303,11 @@ pipe_zone_ctor(void *mem, int size, void *arg, int flags)
*/
rpipe = &pp->pp_rpipe;
bzero(rpipe, sizeof(*rpipe));
#ifndef __rtems__
vfs_timestamp(&rpipe->pipe_ctime);
#else /* __rtems__ */
rpipe->pipe_ctime.tv_sec = time(NULL);
#endif /* __rtems__ */
rpipe->pipe_atime = rpipe->pipe_mtime = rpipe->pipe_ctime;
wpipe = &pp->pp_wpipe;
@@ -336,7 +377,11 @@ kern_pipe(struct thread *td, int fildes[2])
int
do_pipe(struct thread *td, int fildes[2], int flags)
{
#ifndef __rtems__
struct filedesc *fdp = td->td_proc->p_fd;
#else /* __rtems__ */
struct filedesc *fdp = NULL;
#endif /* __rtems__ */
struct file *rf, *wf;
struct pipepair *pp;
struct pipe *rpipe, *wpipe;
@@ -422,6 +467,28 @@ sys_pipe(struct thread *td, struct pipe_args *uap)
return (0);
}
#ifdef __rtems__
int
pipe(int fildes[2])
{
struct thread *td = rtems_bsd_get_curthread_or_null();
int error;
if (td != NULL) {
error = sys_pipe(td, NULL);
} else {
error = ENOMEM;
}
if (error == 0) {
fildes[0] = td->td_retval[0];
fildes[1] = td->td_retval[1];
return error;
} else {
rtems_set_errno_and_return_minus_one(error);
}
}
#endif /* __rtems__ */
/*
* Allocate kva for pipe circular buffer, the space is pageable
@@ -448,12 +515,17 @@ retry:
size = cnt;
size = round_page(size);
#ifndef __rtems__
buffer = (caddr_t) vm_map_min(pipe_map);
error = vm_map_find(pipe_map, NULL, 0,
(vm_offset_t *) &buffer, size, 1,
VM_PROT_ALL, VM_PROT_ALL, 0);
if (error != KERN_SUCCESS) {
#else /* __rtems__ */
buffer = malloc(size, M_TEMP, M_WAITOK | M_ZERO);
if (buffer == NULL) {
#endif /* __rtems__ */
if ((cpipe->pipe_buffer.buffer == NULL) &&
(size > SMALL_PIPE_SIZE)) {
size = SMALL_PIPE_SIZE;
@@ -716,7 +788,11 @@ pipe_read(fp, uio, active_cred, flags, td)
* Handle non-blocking mode operation or
* wait for more data.
*/
#ifndef __rtems__
if (fp->f_flag & FNONBLOCK) {
#else /* __rtems__ */
if (rtems_bsd_libio_flags_to_fflag(fp->f_io.flags) & FNONBLOCK) {
#endif /* __rtems__ */
error = EAGAIN;
} else {
rpipe->pipe_state |= PIPE_WANTR;
@@ -736,7 +812,11 @@ locked_error:
/* XXX: should probably do this before getting any locks. */
if (error == 0)
#ifndef __rtems__
vfs_timestamp(&rpipe->pipe_atime);
#else /* __rtems__ */
rpipe->pipe_atime.tv_sec = time(NULL);
#endif /* __rtems__ */
unlocked_error:
--rpipe->pipe_busy;
@@ -762,6 +842,40 @@ unlocked_error:
PIPE_UNLOCK(rpipe);
return (error);
}
#ifdef __rtems__
static ssize_t
rtems_bsd_pipe_read(rtems_libio_t *iop, void *buffer, size_t count)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
struct file *fp = rtems_bsd_iop_to_fp(iop);
struct iovec iov = {
.iov_base = buffer,
.iov_len = count
};
struct uio auio = {
.uio_iov = &iov,
.uio_iovcnt = 1,
.uio_offset = 0,
.uio_resid = count,
.uio_segflg = UIO_USERSPACE,
.uio_rw = UIO_READ,
.uio_td = td
};
int error;
if (td != NULL) {
error = pipe_read(fp, &auio, NULL, 0, NULL);
} else {
error = ENOMEM;
}
if (error == 0) {
return (count - auio.uio_resid);
} else {
rtems_set_errno_and_return_minus_one(error);
}
}
#endif /* __rtems__ */
#ifndef PIPE_NODIRECT
/*
@@ -1189,7 +1303,11 @@ pipe_write(fp, uio, active_cred, flags, td)
/*
* don't block on non-blocking I/O
*/
#ifndef __rtems__
if (fp->f_flag & FNONBLOCK) {
#else /* __rtems__ */
if (rtems_bsd_libio_flags_to_fflag(fp->f_io.flags) & FNONBLOCK) {
#endif /* __rtems__ */
error = EAGAIN;
pipeunlock(wpipe);
break;
@@ -1237,7 +1355,11 @@ pipe_write(fp, uio, active_cred, flags, td)
}
if (error == 0)
#ifndef __rtems__
vfs_timestamp(&wpipe->pipe_mtime);
#else /* __rtems__ */
wpipe->pipe_mtime.tv_sec = time(NULL);
#endif /* __rtems__ */
/*
* We have something to offer,
@@ -1250,8 +1372,43 @@ pipe_write(fp, uio, active_cred, flags, td)
PIPE_UNLOCK(rpipe);
return (error);
}
#ifdef __rtems__
static ssize_t
rtems_bsd_pipe_write(rtems_libio_t *iop, const void *buffer, size_t count)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
struct file *fp = rtems_bsd_iop_to_fp(iop);
struct iovec iov = {
.iov_base = __DECONST(void *, buffer),
.iov_len = count
};
struct uio auio = {
.uio_iov = &iov,
.uio_iovcnt = 1,
.uio_offset = 0,
.uio_resid = count,
.uio_segflg = UIO_USERSPACE,
.uio_rw = UIO_WRITE,
.uio_td = td
};
int error;
if (td != NULL) {
error = pipe_write(fp, &auio, NULL, 0, NULL);
} else {
error = ENOMEM;
}
if (error == 0) {
return (count - auio.uio_resid);
} else {
rtems_set_errno_and_return_minus_one(error);
}
}
#endif /* __rtems__ */
/* ARGSUSED */
#ifndef __rtems__
static int
pipe_truncate(fp, length, active_cred, td)
struct file *fp;
@@ -1262,6 +1419,7 @@ pipe_truncate(fp, length, active_cred, td)
return (EINVAL);
}
#endif /* __rtems__ */
/*
* we implement a very minimal set of ioctls for compatibility with sockets.
@@ -1336,6 +1494,23 @@ pipe_ioctl(fp, cmd, data, active_cred, td)
out_unlocked:
return (error);
}
#ifdef __rtems__
static int
rtems_bsd_pipe_ioctl(rtems_libio_t *iop, ioctl_command_t request, void *buffer)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
struct file *fp = rtems_bsd_iop_to_fp(iop);
int error;
if (td != NULL) {
error = pipe_ioctl(fp, request, buffer, NULL, td);
} else {
error = ENOMEM;
}
return rtems_bsd_error_to_status_and_errno(error);
}
#endif /* __rtems__ */
static int
pipe_poll(fp, events, active_cred, td)
@@ -1400,11 +1575,29 @@ locked_error:
return (revents);
}
#ifdef __rtems__
static int
rtems_bsd_pipe_poll(rtems_libio_t *iop, int events)
{
struct thread *td = rtems_bsd_get_curthread_or_null();
struct file *fp = rtems_bsd_iop_to_fp(iop);
int error;
if (td != NULL) {
error = pipe_poll(fp, events, NULL, td);
} else {
error = ENOMEM;
}
return error;
}
#endif /* __rtems__ */
/*
* We shouldn't need locks here as we're doing a read and this should
* be a natural race.
*/
#ifndef __rtems__
static int
pipe_stat(fp, ub, active_cred, td)
struct file *fp;
@@ -1413,12 +1606,19 @@ pipe_stat(fp, ub, active_cred, td)
struct thread *td;
{
struct pipe *pipe;
#else /* __rtems__ */
static int
pipe_stat(struct pipe *pipe, struct stat *ub)
{
#endif /* __rtems__ */
int new_unr;
#ifdef MAC
int error;
#endif
#ifndef __rtems__
pipe = fp->f_data;
#endif /* __rtems__ */
PIPE_LOCK(pipe);
#ifdef MAC
error = mac_pipe_check_stat(active_cred, pipe->pipe_pair);
@@ -1446,7 +1646,9 @@ pipe_stat(fp, ub, active_cred, td)
}
PIPE_UNLOCK(pipe);
#ifndef __rtems__
bzero(ub, sizeof(*ub));
#endif /* __rtems__ */
ub->st_mode = S_IFIFO;
ub->st_blksize = PAGE_SIZE;
if (pipe->pipe_state & PIPE_DIRECTW)
@@ -1457,15 +1659,35 @@ pipe_stat(fp, ub, active_cred, td)
ub->st_atim = pipe->pipe_atime;
ub->st_mtim = pipe->pipe_mtime;
ub->st_ctim = pipe->pipe_ctime;
#ifndef __rtems__
ub->st_uid = fp->f_cred->cr_uid;
ub->st_gid = fp->f_cred->cr_gid;
ub->st_dev = pipedev_ino;
ub->st_ino = pipe->pipe_ino;
#else /* __rtems__ */
ub->st_uid = BSD_DEFAULT_UID;
ub->st_gid = BSD_DEFAULT_GID;
ub->st_dev = rtems_filesystem_make_dev_t(0xcc494cd6U, 0x1d970b4dU);
ub->st_ino = pipe->pipe_ino;
#endif /* __rtems__ */
/*
* Left as 0: st_nlink, st_rdev, st_flags, st_gen.
*/
return (0);
}
#ifdef __rtems__
static int
rtems_bsd_pipe_stat(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
struct pipe *pipe = rtems_bsd_loc_to_f_data(loc);
int error = pipe_stat(pipe, buf);
return rtems_bsd_error_to_status_and_errno(error);
}
#endif /* __rtems__ */
/* ARGSUSED */
static int
@@ -1475,7 +1697,11 @@ pipe_close(fp, td)
{
struct pipe *cpipe = fp->f_data;
#ifndef __rtems__
fp->f_ops = &badfileops;
#else /* __rtems__ */
fp->f_io.pathinfo.handlers = &rtems_filesystem_handlers_default;
#endif /* __rtems__ */
fp->f_data = NULL;
funsetown(&cpipe->pipe_sigio);
pipeclose(cpipe);
@@ -1492,9 +1718,13 @@ pipe_free_kmem(cpipe)
if (cpipe->pipe_buffer.buffer != NULL) {
atomic_subtract_long(&amountpipekva, cpipe->pipe_buffer.size);
#ifndef __rtems__
vm_map_remove(pipe_map,
(vm_offset_t)cpipe->pipe_buffer.buffer,
(vm_offset_t)cpipe->pipe_buffer.buffer + cpipe->pipe_buffer.size);
#else /* __rtems__ */
free(cpipe->pipe_buffer.buffer, M_TEMP);
#endif /* __rtems__ */
cpipe->pipe_buffer.buffer = NULL;
}
#ifndef PIPE_NODIRECT
@@ -1626,6 +1856,15 @@ pipe_kqfilter(struct file *fp, struct knote *kn)
PIPE_UNLOCK(cpipe);
return (0);
}
#ifdef __rtems__
int
rtems_bsd_pipe_kqfilter(rtems_libio_t *iop, struct knote *kn)
{
struct file *fp = rtems_bsd_iop_to_fp(iop);
return pipe_kqfilter(fp, kn);
}
#endif /* __rtems__ */
static void
filt_pipedetach(struct knote *kn)
@@ -1687,3 +1926,35 @@ filt_pipewrite(struct knote *kn, long hint)
PIPE_UNLOCK(rpipe);
return (kn->kn_data >= PIPE_BUF);
}
#ifdef __rtems__
static int
rtems_bsd_pipe_open(rtems_libio_t *iop, const char *path, int oflag,
mode_t mode)
{
return rtems_bsd_error_to_status_and_errno(ENXIO);
}
static int
rtems_bsd_pipe_close(rtems_libio_t *iop)
{
struct file *fp = rtems_bsd_iop_to_fp(iop);
int error = pipe_close(fp, NULL);
return rtems_bsd_error_to_status_and_errno(error);
}
static int
rtems_bsd_pipe_fcntl(rtems_libio_t *iop, int cmd)
{
int error = 0;
if (cmd == F_SETFL) {
struct file *fp = rtems_bsd_iop_to_fp(iop);
int nbio = iop->flags & LIBIO_FLAGS_NO_DELAY;
error = pipe_ioctl(fp, FIONBIO, &nbio, NULL, NULL);
}
return rtems_bsd_error_to_status_and_errno(error);
}
#endif /* __rtems__ */

2
freebsd/sys/sys/pipe.h Normal file → Executable file
View File

@@ -78,7 +78,9 @@ struct pipemapping {
vm_size_t cnt; /* number of chars in buffer */
vm_size_t pos; /* current position of transfer */
int npages; /* number of pages */
#ifndef __rtems__
vm_page_t ms[PIPENPAGES]; /* pages in source process */
#endif /* __rtems__ */
};
/*