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-rw-r--r--devio/devio.c359
1 files changed, 0 insertions, 359 deletions
diff --git a/devio/devio.c b/devio/devio.c
deleted file mode 100644
index f1eb428a..00000000
--- a/devio/devio.c
+++ /dev/null
@@ -1,359 +0,0 @@
-/* A translator for doing I/O to mach kernel devices.
-
- Copyright (C) 1995 Free Software Foundation, Inc.
-
- Written by Miles Bader <miles@gnu.ai.mit.edu>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include <hurd.h>
-#include <hurd/ports.h>
-#include <hurd/pager.h>
-#include <hurd/trivfs.h>
-#include <hurd/fsys.h>
-
-#include <stdio.h>
-#include <error.h>
-#include <getopt.h>
-#include <assert.h>
-#include <fcntl.h>
-
-#include "open.h"
-#include "dev.h"
-
-/* ---------------------------------------------------------------- */
-
-/* The port class of our file system control pointer. */
-struct port_class *fsys_port_class;
-/* The port class of the (only) root file port for the opened device. */
-struct port_class *root_port_class;
-
-/* A bucket to put all our ports in. */
-struct port_bucket *port_bucket;
-
-/* Trivfs noise. */
-struct port_class *trivfs_protid_portclasses[1];
-struct port_class *trivfs_cntl_portclasses[1];
-int trivfs_protid_nportclasses = 1;
-int trivfs_cntl_nportclasses = 1;
-
-/* ---------------------------------------------------------------- */
-
-#define USAGE "Usage: %s [OPTION...] DEVICE\n"
-
-static void
-usage(int status)
-{
- if (status != 0)
- fprintf(stderr, "Try `%s --help' for more information.\n",
- program_invocation_name);
- else
- {
- printf(USAGE, program_invocation_name);
- printf("\
-\n\
- -d, --devnum=NUM Give DEVICE a device number NUM\n\
- -r, --readonly Disable writing to DEVICE\n\
- -p, --seekable Enable seeking if DEVICE is serial\n\
- -s, --serial Indicate that DEVICE has a single R/W point\n\
- -b, --buffered, --block Open DEVICE in `block' mode, which allows reads\n\
- or writes less than a single block and buffers\n\
- I/O to the actual device. By default, all reads\n\
- and writes are made directly to the device,\n\
- with no buffering, and any sub-block-size I/O\n\
- is padded to the nearest full block.\n\
- -B NUM, --block-size=NUM Use a block size of NUM, which must be an integer\n\
- multiple of DEVICE's real block size\n\
-");
- }
-
- exit(status);
-}
-
-#define SHORT_OPTIONS "bB:d:D:?rpsu"
-
-static struct option options[] =
-{
- {"block-size", required_argument, 0, 'B'},
- {"help", no_argument, 0, '?'},
- {"devnum", required_argument, 0, 'm'},
- {"block", no_argument, 0, 'b'},
- {"buffered", no_argument, 0, 'b'},
- {"readonly", no_argument, 0, 'r'},
- {"seekable", no_argument, 0, 'p'},
- {"serial", no_argument, 0, 's'},
- {0, 0, 0, 0}
-};
-
-/* ---------------------------------------------------------------- */
-
-/* A struct dev for the open kernel device. */
-static struct dev *device = NULL;
-/* And a lock to arbitrate changes to it. */
-static struct mutex device_lock;
-
-/* Desired device parameters specified by the user. */
-static char *device_name = NULL;
-static int device_flags = 0;
-static int device_block_size = 0;
-
-/* A unixy device number to return when the device is stat'd. */
-static int device_number = 0;
-
-void main(int argc, char *argv[])
-{
- int opt;
- error_t err;
- mach_port_t bootstrap;
-
- while ((opt = getopt_long(argc, argv, SHORT_OPTIONS, options, 0)) != EOF)
- switch (opt)
- {
- case 'r': device_flags |= DEV_READONLY; break;
- case 's': device_flags |= DEV_SERIAL; break;
- case 'b': device_flags |= DEV_BUFFERED; break;
- case 'p': device_flags |= DEV_SEEKABLE; break;
- case 'B': device_block_size = atoi(optarg); break;
- case 'd': device_number = atoi(optarg); break;
- case '?': usage(0);
- default: usage(1);
- }
-
- if (device_flags & DEV_READONLY)
- /* Catch illegal writes at the point of open. */
- trivfs_allow_open &= ~O_WRITE;
-
- if (argv[optind] == NULL || argv[optind + 1] != NULL)
- {
- fprintf(stderr, USAGE, program_invocation_name);
- usage(1);
- }
-
- device_name = argv[optind];
-
- task_get_bootstrap_port (mach_task_self (), &bootstrap);
- if (bootstrap == MACH_PORT_NULL)
- error(2, 0, "Must be started as a translator");
-
- fsys_port_class = ports_create_class (trivfs_clean_cntl, 0);
- root_port_class = ports_create_class (trivfs_clean_protid, 0);
- port_bucket = ports_create_bucket ();
- trivfs_protid_portclasses[0] = root_port_class;
- trivfs_cntl_portclasses[0] = fsys_port_class;
-
- /* Reply to our parent */
- err =
- trivfs_startup(bootstrap, 0,
- fsys_port_class, port_bucket,
- root_port_class, port_bucket,
- NULL);
- if (err)
- error(3, err, "Contacting parent");
-
- /* Open the device only when necessary. */
- device = NULL;
- mutex_init(&device_lock);
-
- /* Launch. */
- ports_manage_port_operations_multithread (port_bucket, trivfs_demuxer,
- 30*1000, 5*60*1000, 0, 0);
-
- exit(0);
-}
-
-/* Called whenever someone tries to open our node (even for a stat). We
- delay opening the kernel device until this point, as we can usefully
- return errors from here. */
-static error_t
-check_open_hook (struct trivfs_control *trivfs_control,
- uid_t *uids, u_int nuids,
- gid_t *gids, u_int ngids,
- int flags)
-{
- error_t err = 0;
-
- mutex_lock(&device_lock);
- if (device == NULL)
- /* Try and open the device. */
- {
- err = dev_open(device_name, device_flags, device_block_size, &device);
- if (err)
- device = NULL;
- if (err && (flags & (O_READ|O_WRITE)) == 0)
- /* If we're not opening for read or write, then just ignore the
- error, as this allows stat to word correctly. XXX */
- err = 0;
- }
- mutex_unlock(&device_lock);
-
- return err;
-}
-
-static error_t
-open_hook(struct trivfs_peropen *peropen)
-{
- struct dev *dev = device;
- if (dev)
- return open_create(dev, (struct open **)&peropen->hook);
- else
- return 0;
-}
-
-static void
-close_hook(struct trivfs_peropen *peropen)
-{
- if (peropen->hook)
- open_free(peropen->hook);
-}
-
-/* ---------------------------------------------------------------- */
-/* Trivfs hooks */
-
-int trivfs_fstype = FSTYPE_DEV;
-int trivfs_fsid = 0;
-
-int trivfs_support_read = 1;
-int trivfs_support_write = 1;
-int trivfs_support_exec = 0;
-
-int trivfs_allow_open = O_READ | O_WRITE;
-
-void
-trivfs_modify_stat (struct trivfs_protid *cred, struct stat *st)
-{
- struct open *open = cred->po->hook;
-
- if (open)
- /* An open device. */
- {
- struct dev *dev = open->dev;
- vm_size_t size = dev->size;
-
- if (dev->block_size > 1)
- st->st_blksize = dev->block_size;
-
- st->st_size = size;
- st->st_blocks = size / 512;
-
- if (dev_is(dev, DEV_READONLY))
- st->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
-
- st->st_mode &= ~S_IFMT;
- st->st_mode |= dev_is(dev, DEV_BUFFERED) ? S_IFBLK : S_IFCHR;
- }
- else
- /* Try and do things without an open device... */
- {
- st->st_blksize = device_block_size;
- st->st_size = 0;
- st->st_blocks = 0;
- st->st_mode &= ~S_IFMT;
- st->st_mode |= (device_flags & DEV_BUFFERED) ? S_IFBLK : S_IFCHR;
- if (device_flags & DEV_READONLY)
- st->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
- }
-
- st->st_rdev = device_number;
-}
-
-error_t
-trivfs_goaway (struct trivfs_control *fsys, int flags)
-{
- error_t err;
- int force = (flags & FSYS_GOAWAY_FORCE);
- int nosync = (flags & FSYS_GOAWAY_NOSYNC);
-
- mutex_lock(&device_lock);
-
- if (device == NULL)
- exit (0);
-
- /* Wait until all pending rpcs are done. */
- err = ports_inhibit_class_rpcs (root_port_class);
- if (err == EINTR || (err && !force))
- {
- mutex_unlock (&device_lock);
- return err;
- }
-
- if (force && nosync)
- /* Exit with extreme prejudice. */
- exit (0);
-
- if (!force && ports_count_class (root_port_class) > 0)
- /* Still users, so don't exit. */
- goto busy;
-
- if (!nosync)
- /* Sync the device here, if necessary, so that closing it won't result in
- any I/O (which could get hung up trying to use one of our pagers). */
- dev_sync (device, 1);
-
- /* devpager_shutdown may sync the pagers as side-effect (if NOSYNC is 0),
- so we put that first in this test. */
- if (dev_stop_paging (device, nosync) || force)
- /* Bye-bye. */
- {
- if (!nosync)
- /* If NOSYNC is true, we don't close DEV, as that could cause data to
- be written back. */
- dev_close (device);
- exit (0);
- }
-
- busy:
- /* Allow normal operations to proceed. */
- ports_enable_class (root_port_class);
- ports_resume_class_rpcs (root_port_class);
- mutex_unlock(&device_lock);
-
- /* Complain that there are still users. */
- return EBUSY;
-}
-
-/* If this variable is set, it is called every time an open happens.
- UIDS, GIDS, and FLAGS are from the open; CNTL identifies the
- node being opened. This call need not check permissions on the underlying
- node. If the open call should block, then return EWOULDBLOCK. Other
- errors are immediately reflected to the user. If O_NONBLOCK
- is not set in FLAGS and EWOULDBLOCK is returned, then call
- trivfs_complete_open when all pending open requests for this
- file can complete. */
-error_t (*trivfs_check_open_hook)(struct trivfs_control *trivfs_control,
- uid_t *uids, u_int nuids,
- gid_t *gids, u_int ngids,
- int flags)
- = check_open_hook;
-
-/* If this variable is set, it is called every time a new peropen
- structure is created and initialized. */
-error_t (*trivfs_peropen_create_hook)(struct trivfs_peropen *) = open_hook;
-
-/* If this variable is set, it is called every time a peropen structure
- is about to be destroyed. */
-void (*trivfs_peropen_destroy_hook) (struct trivfs_peropen *) = close_hook;
-
-/* Sync this filesystem. */
-kern_return_t
-trivfs_S_fsys_syncfs (struct trivfs_control *cntl,
- mach_port_t reply, mach_msg_type_name_t replytype,
- int wait, int dochildren)
-{
- struct dev *dev = device;
- if (dev)
- return dev_sync(dev, wait);
- else
- return 0;
-}
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