2874c5fd28426 (Thomas Gleixner 2019-05-27 08:55:01 +0200 1) // SPDX-License-Identifier: GPL-2.0-or-later
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 2) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 3) * An implementation of a loadable kernel mode driver providing
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 4) * multiple kernel/user space bidirectional communications links.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 5) *
526719ba51e7d (Alan Cox 2008-10-27 15:19:48 +0000 6) * Author: Alan Cox <alan@lxorguk.ukuu.org.uk>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 7) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 8) * Adapted to become the Linux 2.0 Coda pseudo device
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 9) * Peter Braam <braam@maths.ox.ac.uk>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 10) * Michael Callahan <mjc@emmy.smith.edu>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 11) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 12) * Changes for Linux 2.1
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 13) * Copyright (c) 1997 Carnegie-Mellon University
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 14) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 15)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 16) #include <linux/module.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 17) #include <linux/errno.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18) #include <linux/kernel.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19) #include <linux/major.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 20) #include <linux/time.h>
174cd4b1e5fbd (Ingo Molnar 2017-02-02 19:15:33 +0100 21) #include <linux/sched/signal.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 22) #include <linux/slab.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 23) #include <linux/ioport.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 24) #include <linux/fcntl.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 25) #include <linux/delay.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 26) #include <linux/skbuff.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 27) #include <linux/proc_fs.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 28) #include <linux/vmalloc.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 29) #include <linux/fs.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 30) #include <linux/file.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 31) #include <linux/poll.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 32) #include <linux/init.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 33) #include <linux/list.h>
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 34) #include <linux/mutex.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 35) #include <linux/device.h>
9fd973e085f77 (Eric W. Biederman 2013-01-30 18:50:54 -0800 36) #include <linux/pid_namespace.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37) #include <asm/io.h>
834b46c37a290 (Fabian Frederick 2014-08-08 14:20:33 -0700 38) #include <linux/uaccess.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 39)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 40) #include <linux/coda.h>
8fc8b9df83138 (David Howells 2019-07-16 16:28:47 -0700 41) #include "coda_psdev.h"
31a203df9c109 (Al Viro 2011-01-12 16:36:09 -0500 42) #include "coda_linux.h"
31a203df9c109 (Al Viro 2011-01-12 16:36:09 -0500 43)
c98d8cfbc600a (Adrian Bunk 2006-03-24 03:15:53 -0800 44) #include "coda_int.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 45)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 46) /* statistics */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 47) int coda_hard; /* allows signals during upcalls */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 48) unsigned long coda_timeout = 30; /* .. secs, then signals will dequeue */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 49)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 50)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 51) struct venus_comm coda_comms[MAX_CODADEVS];
1db560afe629b (Greg Kroah-Hartman 2005-03-23 10:02:26 -0800 52) static struct class *coda_psdev_class;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 53)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 54) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 55) * Device operations
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 56) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 57)
076ccb76e1a6c (Al Viro 2017-07-03 01:02:18 -0400 58) static __poll_t coda_psdev_poll(struct file *file, poll_table * wait)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 59) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 60) struct venus_comm *vcp = (struct venus_comm *) file->private_data;
a9a08845e9acb (Linus Torvalds 2018-02-11 14:34:03 -0800 61) __poll_t mask = EPOLLOUT | EPOLLWRNORM;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 63) poll_wait(file, &vcp->vc_waitq, wait);
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 64) mutex_lock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 65) if (!list_empty(&vcp->vc_pending))
a9a08845e9acb (Linus Torvalds 2018-02-11 14:34:03 -0800 66) mask |= EPOLLIN | EPOLLRDNORM;
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 67) mutex_unlock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 68)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 69) return mask;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 70) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71)
977183902a52d (Arnd Bergmann 2010-04-27 16:24:24 +0200 72) static long coda_psdev_ioctl(struct file * filp, unsigned int cmd, unsigned long arg)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 73) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 74) unsigned int data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 75)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 76) switch(cmd) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 77) case CIOC_KERNEL_VERSION:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 78) data = CODA_KERNEL_VERSION;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 79) return put_user(data, (int __user *) arg);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 80) default:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 81) return -ENOTTY;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 82) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 83)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 84) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 85) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 86)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 87) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 88) * Receive a message written by Venus to the psdev
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 89) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 90)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 91) static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 92) size_t nbytes, loff_t *off)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 93) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 94) struct venus_comm *vcp = (struct venus_comm *) file->private_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 95) struct upc_req *req = NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 96) struct upc_req *tmp;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 97) struct list_head *lh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 98) struct coda_in_hdr hdr;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 99) ssize_t retval = 0, count = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 100) int error;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 101)
6e51f8aa76b67 (Jan Harkes 2019-07-16 16:28:16 -0700 102) /* make sure there is enough to copy out the (opcode, unique) values */
6e51f8aa76b67 (Jan Harkes 2019-07-16 16:28:16 -0700 103) if (nbytes < (2 * sizeof(u_int32_t)))
6e51f8aa76b67 (Jan Harkes 2019-07-16 16:28:16 -0700 104) return -EINVAL;
6e51f8aa76b67 (Jan Harkes 2019-07-16 16:28:16 -0700 105)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 106) /* Peek at the opcode, uniquefier */
6e51f8aa76b67 (Jan Harkes 2019-07-16 16:28:16 -0700 107) if (copy_from_user(&hdr, buf, 2 * sizeof(u_int32_t)))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 108) return -EFAULT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 109)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 110) if (DOWNCALL(hdr.opcode)) {
f7cc02b871561 (Yoshihisa Abe 2010-10-25 02:03:45 -0400 111) union outputArgs *dcbuf;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 112) int size = sizeof(*dcbuf);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 113)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 114) if ( nbytes < sizeof(struct coda_out_hdr) ) {
d9b4b3195a06e (Fabian Frederick 2014-06-06 14:36:18 -0700 115) pr_warn("coda_downcall opc %d uniq %d, not enough!\n",
d9b4b3195a06e (Fabian Frederick 2014-06-06 14:36:18 -0700 116) hdr.opcode, hdr.unique);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 117) count = nbytes;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 118) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 119) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 120) if ( nbytes > size ) {
f38cfb2564f5f (Fabian Frederick 2014-06-06 14:36:19 -0700 121) pr_warn("downcall opc %d, uniq %d, too much!",
d9b4b3195a06e (Fabian Frederick 2014-06-06 14:36:18 -0700 122) hdr.opcode, hdr.unique);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 123) nbytes = size;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 124) }
4dc48193d748f (Dan Carpenter 2019-07-16 16:28:38 -0700 125) dcbuf = kvmalloc(nbytes, GFP_KERNEL);
4dc48193d748f (Dan Carpenter 2019-07-16 16:28:38 -0700 126) if (!dcbuf) {
4dc48193d748f (Dan Carpenter 2019-07-16 16:28:38 -0700 127) retval = -ENOMEM;
4dc48193d748f (Dan Carpenter 2019-07-16 16:28:38 -0700 128) goto out;
4dc48193d748f (Dan Carpenter 2019-07-16 16:28:38 -0700 129) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 130) if (copy_from_user(dcbuf, buf, nbytes)) {
936dae4525322 (Dan Carpenter 2019-07-16 16:28:41 -0700 131) kvfree(dcbuf);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 132) retval = -EFAULT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 133) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 134) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 135)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 136) /* what downcall errors does Venus handle ? */
6e51f8aa76b67 (Jan Harkes 2019-07-16 16:28:16 -0700 137) error = coda_downcall(vcp, hdr.opcode, dcbuf, nbytes);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 138)
936dae4525322 (Dan Carpenter 2019-07-16 16:28:41 -0700 139) kvfree(dcbuf);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 140) if (error) {
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 141) pr_warn("%s: coda_downcall error: %d\n",
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 142) __func__, error);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 143) retval = error;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 144) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 145) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 146) count = nbytes;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 147) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 148) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 149)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 150) /* Look for the message on the processing queue. */
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 151) mutex_lock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 152) list_for_each(lh, &vcp->vc_processing) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 153) tmp = list_entry(lh, struct upc_req , uc_chain);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 154) if (tmp->uc_unique == hdr.unique) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 155) req = tmp;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 156) list_del(&req->uc_chain);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 157) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 158) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 159) }
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 160) mutex_unlock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 161)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 162) if (!req) {
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 163) pr_warn("%s: msg (%d, %d) not found\n",
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 164) __func__, hdr.opcode, hdr.unique);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 165) retval = -ESRCH;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 166) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 167) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 168)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 169) /* move data into response buffer. */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 170) if (req->uc_outSize < nbytes) {
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 171) pr_warn("%s: too much cnt: %d, cnt: %ld, opc: %d, uniq: %d.\n",
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 172) __func__, req->uc_outSize, (long)nbytes,
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 173) hdr.opcode, hdr.unique);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 174) nbytes = req->uc_outSize; /* don't have more space! */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 175) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 176) if (copy_from_user(req->uc_data, buf, nbytes)) {
4aeefdc69f7b6 (Jens Axboe 2010-08-03 13:22:51 +0200 177) req->uc_flags |= CODA_REQ_ABORT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 178) wake_up(&req->uc_sleep);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 179) retval = -EFAULT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 180) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 181) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 182)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 183) /* adjust outsize. is this useful ?? */
112d421df2fdd (Jan Harkes 2010-09-17 23:26:01 -0400 184) req->uc_outSize = nbytes;
112d421df2fdd (Jan Harkes 2010-09-17 23:26:01 -0400 185) req->uc_flags |= CODA_REQ_WRITE;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 186) count = nbytes;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 187)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 188) /* Convert filedescriptor into a file handle */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 189) if (req->uc_opcode == CODA_OPEN_BY_FD) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 190) struct coda_open_by_fd_out *outp =
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 191) (struct coda_open_by_fd_out *)req->uc_data;
02551c23bcd85 (Zhouyang Jia 2019-07-16 16:28:13 -0700 192) if (!outp->oh.result) {
38c2e4370da49 (Jan Harkes 2007-07-19 01:48:41 -0700 193) outp->fh = fget(outp->fd);
02551c23bcd85 (Zhouyang Jia 2019-07-16 16:28:13 -0700 194) if (!outp->fh)
02551c23bcd85 (Zhouyang Jia 2019-07-16 16:28:13 -0700 195) return -EBADF;
02551c23bcd85 (Zhouyang Jia 2019-07-16 16:28:13 -0700 196) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 197) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 198)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 199) wake_up(&req->uc_sleep);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 200) out:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 201) return(count ? count : retval);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 202) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 203)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 204) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 205) * Read a message from the kernel to Venus
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 206) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 207)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 208) static ssize_t coda_psdev_read(struct file * file, char __user * buf,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 209) size_t nbytes, loff_t *off)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 210) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 211) DECLARE_WAITQUEUE(wait, current);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 212) struct venus_comm *vcp = (struct venus_comm *) file->private_data;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 213) struct upc_req *req;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 214) ssize_t retval = 0, count = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 215)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 216) if (nbytes == 0)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 217) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 218)
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 219) mutex_lock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 220)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 221) add_wait_queue(&vcp->vc_waitq, &wait);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 222) set_current_state(TASK_INTERRUPTIBLE);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 223)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 224) while (list_empty(&vcp->vc_pending)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 225) if (file->f_flags & O_NONBLOCK) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 226) retval = -EAGAIN;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 227) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 228) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 229) if (signal_pending(current)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 230) retval = -ERESTARTSYS;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 231) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 232) }
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 233) mutex_unlock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 234) schedule();
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 235) mutex_lock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 236) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 237)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 238) set_current_state(TASK_RUNNING);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 239) remove_wait_queue(&vcp->vc_waitq, &wait);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 240)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 241) if (retval)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 242) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 243)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 244) req = list_entry(vcp->vc_pending.next, struct upc_req,uc_chain);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 245) list_del(&req->uc_chain);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 246)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 247) /* Move the input args into userspace */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 248) count = req->uc_inSize;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 249) if (nbytes < req->uc_inSize) {
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 250) pr_warn("%s: Venus read %ld bytes of %d in message\n",
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 251) __func__, (long)nbytes, req->uc_inSize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 252) count = nbytes;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 253) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 254)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 255) if (copy_to_user(buf, req->uc_data, count))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 256) retval = -EFAULT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 257)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 258) /* If request was not a signal, enqueue and don't free */
4aeefdc69f7b6 (Jens Axboe 2010-08-03 13:22:51 +0200 259) if (!(req->uc_flags & CODA_REQ_ASYNC)) {
4aeefdc69f7b6 (Jens Axboe 2010-08-03 13:22:51 +0200 260) req->uc_flags |= CODA_REQ_READ;
8e13059a37252 (Akinobu Mita 2006-06-26 00:24:37 -0700 261) list_add_tail(&(req->uc_chain), &vcp->vc_processing);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 262) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 263) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 264)
936dae4525322 (Dan Carpenter 2019-07-16 16:28:41 -0700 265) kvfree(req->uc_data);
37461e1957e62 (Jan Harkes 2007-07-19 01:48:48 -0700 266) kfree(req);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 267) out:
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 268) mutex_unlock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 269) return (count ? count : retval);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 270) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 271)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 272) static int coda_psdev_open(struct inode * inode, struct file * file)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 273) {
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 274) struct venus_comm *vcp;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 275) int idx, err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 276)
9fd973e085f77 (Eric W. Biederman 2013-01-30 18:50:54 -0800 277) if (task_active_pid_ns(current) != &init_pid_ns)
9fd973e085f77 (Eric W. Biederman 2013-01-30 18:50:54 -0800 278) return -EINVAL;
9fd973e085f77 (Eric W. Biederman 2013-01-30 18:50:54 -0800 279)
d83f5901bc0cd (Eric W. Biederman 2013-01-30 19:21:14 -0800 280) if (current_user_ns() != &init_user_ns)
d83f5901bc0cd (Eric W. Biederman 2013-01-30 19:21:14 -0800 281) return -EINVAL;
d83f5901bc0cd (Eric W. Biederman 2013-01-30 19:21:14 -0800 282)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 283) idx = iminor(inode);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 284) if (idx < 0 || idx >= MAX_CODADEVS)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 285) return -ENODEV;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 286)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 287) err = -EBUSY;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 288) vcp = &coda_comms[idx];
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 289) mutex_lock(&vcp->vc_mutex);
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 290)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 291) if (!vcp->vc_inuse) {
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 292) vcp->vc_inuse++;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 293)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 294) INIT_LIST_HEAD(&vcp->vc_pending);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 295) INIT_LIST_HEAD(&vcp->vc_processing);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 296) init_waitqueue_head(&vcp->vc_waitq);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 297) vcp->vc_sb = NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 298) vcp->vc_seq = 0;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 299)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 300) file->private_data = vcp;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 301) err = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 302) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 303)
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 304) mutex_unlock(&vcp->vc_mutex);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 305) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 306) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 307)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 308)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 309) static int coda_psdev_release(struct inode * inode, struct file * file)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 310) {
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 311) struct venus_comm *vcp = (struct venus_comm *) file->private_data;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 312) struct upc_req *req, *tmp;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 313)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 314) if (!vcp || !vcp->vc_inuse ) {
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 315) pr_warn("%s: Not open.\n", __func__);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 316) return -1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 317) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 318)
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 319) mutex_lock(&vcp->vc_mutex);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 320)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 321) /* Wakeup clients so they can return. */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 322) list_for_each_entry_safe(req, tmp, &vcp->vc_pending, uc_chain) {
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 323) list_del(&req->uc_chain);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 324)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 325) /* Async requests need to be freed here */
4aeefdc69f7b6 (Jens Axboe 2010-08-03 13:22:51 +0200 326) if (req->uc_flags & CODA_REQ_ASYNC) {
936dae4525322 (Dan Carpenter 2019-07-16 16:28:41 -0700 327) kvfree(req->uc_data);
37461e1957e62 (Jan Harkes 2007-07-19 01:48:48 -0700 328) kfree(req);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 329) continue;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 330) }
4aeefdc69f7b6 (Jens Axboe 2010-08-03 13:22:51 +0200 331) req->uc_flags |= CODA_REQ_ABORT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 332) wake_up(&req->uc_sleep);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 333) }
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 334)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 335) list_for_each_entry_safe(req, tmp, &vcp->vc_processing, uc_chain) {
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 336) list_del(&req->uc_chain);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 337)
4aeefdc69f7b6 (Jens Axboe 2010-08-03 13:22:51 +0200 338) req->uc_flags |= CODA_REQ_ABORT;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 339) wake_up(&req->uc_sleep);
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 340) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 341)
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 342) file->private_data = NULL;
87065519633af (Jan Harkes 2007-07-19 01:48:45 -0700 343) vcp->vc_inuse--;
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 344) mutex_unlock(&vcp->vc_mutex);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 345) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 346) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 347)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 348)
4b6f5d20b04dc (Arjan van de Ven 2006-03-28 01:56:42 -0800 349) static const struct file_operations coda_psdev_fops = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 350) .owner = THIS_MODULE,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 351) .read = coda_psdev_read,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 352) .write = coda_psdev_write,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 353) .poll = coda_psdev_poll,
977183902a52d (Arnd Bergmann 2010-04-27 16:24:24 +0200 354) .unlocked_ioctl = coda_psdev_ioctl,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 355) .open = coda_psdev_open,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 356) .release = coda_psdev_release,
6038f373a3dc1 (Arnd Bergmann 2010-08-15 18:52:59 +0200 357) .llseek = noop_llseek,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 358) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 359)
f94845284abed (Fabian Frederick 2019-07-16 16:29:00 -0700 360) static int __init init_coda_psdev(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 361) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 362) int i, err = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 363) if (register_chrdev(CODA_PSDEV_MAJOR, "coda", &coda_psdev_fops)) {
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 364) pr_err("%s: unable to get major %d\n",
6d6bd94f4d83d (Fabian Frederick 2014-06-06 14:36:20 -0700 365) __func__, CODA_PSDEV_MAJOR);
850622136ff2a (Colin Ian King 2019-07-16 16:28:29 -0700 366) return -EIO;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 367) }
1db560afe629b (Greg Kroah-Hartman 2005-03-23 10:02:26 -0800 368) coda_psdev_class = class_create(THIS_MODULE, "coda");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 369) if (IS_ERR(coda_psdev_class)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 370) err = PTR_ERR(coda_psdev_class);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 371) goto out_chrdev;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 372) }
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 373) for (i = 0; i < MAX_CODADEVS; i++) {
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 374) mutex_init(&(&coda_comms[i])->vc_mutex);
a9b12619f7b6f (Greg Kroah-Hartman 2008-07-21 20:03:34 -0700 375) device_create(coda_psdev_class, NULL,
a9b12619f7b6f (Greg Kroah-Hartman 2008-07-21 20:03:34 -0700 376) MKDEV(CODA_PSDEV_MAJOR, i), NULL, "cfs%d", i);
da47c19e5c746 (Yoshihisa Abe 2010-10-25 02:03:46 -0400 377) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 378) coda_sysctl_init();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 379) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 380)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 381) out_chrdev:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 382) unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 383) out:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 384) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 385) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 386)
5b7f13bd26a0c (Jan Harkes 2007-07-19 01:48:52 -0700 387) MODULE_AUTHOR("Jan Harkes, Peter J. Braam");
5b7f13bd26a0c (Jan Harkes 2007-07-19 01:48:52 -0700 388) MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
5b7f13bd26a0c (Jan Harkes 2007-07-19 01:48:52 -0700 389) MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 390) MODULE_LICENSE("GPL");
a9fba24c6ac9b (Pedro Cuadra 2019-07-16 16:29:13 -0700 391) MODULE_VERSION("7.0");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 392)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 393) static int __init init_coda(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 394) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 395) int status;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 396) int i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 397)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 398) status = coda_init_inodecache();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 399) if (status)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 400) goto out2;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 401) status = init_coda_psdev();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 402) if ( status ) {
d9b4b3195a06e (Fabian Frederick 2014-06-06 14:36:18 -0700 403) pr_warn("Problem (%d) in init_coda_psdev\n", status);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 404) goto out1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 405) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 406)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 407) status = register_filesystem(&coda_fs_type);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 408) if (status) {
f38cfb2564f5f (Fabian Frederick 2014-06-06 14:36:19 -0700 409) pr_warn("failed to register filesystem!\n");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 410) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 411) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 412) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 413) out:
8ab5e4c15b53e (Greg Kroah-Hartman 2005-06-20 21:15:16 -0700 414) for (i = 0; i < MAX_CODADEVS; i++)
62ca8792560e5 (Kay Sievers 2007-09-25 02:03:03 +0200 415) device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
1db560afe629b (Greg Kroah-Hartman 2005-03-23 10:02:26 -0800 416) class_destroy(coda_psdev_class);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 417) unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 418) coda_sysctl_clean();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 419) out1:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 420) coda_destroy_inodecache();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 421) out2:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 422) return status;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 423) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 424)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 425) static void __exit exit_coda(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 426) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 427) int err, i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 428)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 429) err = unregister_filesystem(&coda_fs_type);
d9b4b3195a06e (Fabian Frederick 2014-06-06 14:36:18 -0700 430) if (err != 0)
f38cfb2564f5f (Fabian Frederick 2014-06-06 14:36:19 -0700 431) pr_warn("failed to unregister filesystem\n");
8ab5e4c15b53e (Greg Kroah-Hartman 2005-06-20 21:15:16 -0700 432) for (i = 0; i < MAX_CODADEVS; i++)
62ca8792560e5 (Kay Sievers 2007-09-25 02:03:03 +0200 433) device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
1db560afe629b (Greg Kroah-Hartman 2005-03-23 10:02:26 -0800 434) class_destroy(coda_psdev_class);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 435) unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 436) coda_sysctl_clean();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 437) coda_destroy_inodecache();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 438) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 439)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 440) module_init(init_coda);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 441) module_exit(exit_coda);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 442)
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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