From b1580fb039a62cbc82c3c205e82c7aaea538875e Mon Sep 17 00:00:00 2001 From: Kevin Kirspel Date: Wed, 21 Dec 2016 11:01:28 -0800 Subject: PIPE(2): Port to RTEMS --- freebsd/sys/kern/sys_pipe.c | 271 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 271 insertions(+) mode change 100644 => 100755 freebsd/sys/kern/sys_pipe.c (limited to 'freebsd/sys/kern/sys_pipe.c') diff --git a/freebsd/sys/kern/sys_pipe.c b/freebsd/sys/kern/sys_pipe.c old mode 100644 new mode 100755 index 5565c007..45d3ed13 --- a/freebsd/sys/kern/sys_pipe.c +++ b/freebsd/sys/kern/sys_pipe.c @@ -131,6 +131,9 @@ __FBSDID("$FreeBSD$"); #include /* 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__ */ -- cgit v1.2.3