11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * An implementation of a loadable kernel mode driver providing 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * multiple kernel/user space bidirectional communications links. 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 5526719ba51e7d7bd31f7af9ab04b015b70096685Alan Cox * Author: Alan Cox <alan@lxorguk.ukuu.org.uk> 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2 of the License, or (at your option) any later version. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Adapted to become the Linux 2.0 Coda pseudo device 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Peter Braam <braam@maths.ox.ac.uk> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Michael Callahan <mjc@emmy.smith.edu> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Changes for Linux 2.1 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 1997 Carnegie-Mellon University 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/major.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/time.h> 25a99bbaf5ee6bad1aca0c88ea65ec6e5373e86184Alexey Dobriyan#include <linux/sched.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioport.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fcntl.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/skbuff.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/proc_fs.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/vmalloc.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/file.h> 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/poll.h> 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/list.h> 38da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe#include <linux/mutex.h> 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 409fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman#include <linux/pid_namespace.h> 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/io.h> 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/poll.h> 43834b46c37a2900bc90b5f1c5a11815be5a025445Fabian Frederick#include <linux/uaccess.h> 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/coda.h> 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/coda_psdev.h> 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4831a203df9c109480fc6d48ba0a68763e89199acbAl Viro#include "coda_linux.h" 4931a203df9c109480fc6d48ba0a68763e89199acbAl Viro 50c98d8cfbc600af88e9e6cffc84dd342280445760Adrian Bunk#include "coda_int.h" 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* statistics */ 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint coda_hard; /* allows signals during upcalls */ 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned long coda_timeout = 30; /* .. secs, then signals will dequeue */ 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct venus_comm coda_comms[MAX_CODADEVS]; 581db560afe629b682c45a7f4ba7edf98b4ee28518Greg Kroah-Hartmanstatic struct class *coda_psdev_class; 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Device operations 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int coda_psdev_poll(struct file *file, poll_table * wait) 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct venus_comm *vcp = (struct venus_comm *) file->private_data; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int mask = POLLOUT | POLLWRNORM; 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds poll_wait(file, &vcp->vc_waitq, wait); 70da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!list_empty(&vcp->vc_pending)) 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask |= POLLIN | POLLRDNORM; 73da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return mask; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 78977183902a52d1e0adc986f9462424db5a545044Arnd Bergmannstatic long coda_psdev_ioctl(struct file * filp, unsigned int cmd, unsigned long arg) 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int data; 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch(cmd) { 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CIOC_KERNEL_VERSION: 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data = CODA_KERNEL_VERSION; 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return put_user(data, (int __user *) arg); 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOTTY; 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Receive a message written by Venus to the psdev 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t coda_psdev_write(struct file *file, const char __user *buf, 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t nbytes, loff_t *off) 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct venus_comm *vcp = (struct venus_comm *) file->private_data; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct upc_req *req = NULL; 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct upc_req *tmp; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head *lh; 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct coda_in_hdr hdr; 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t retval = 0, count = 0; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int error; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Peek at the opcode, uniquefier */ 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(&hdr, buf, 2 * sizeof(u_long))) 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EFAULT; 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (DOWNCALL(hdr.opcode)) { 113f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe union outputArgs *dcbuf; 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int size = sizeof(*dcbuf); 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( nbytes < sizeof(struct coda_out_hdr) ) { 117d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick pr_warn("coda_downcall opc %d uniq %d, not enough!\n", 118d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick hdr.opcode, hdr.unique); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = nbytes; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( nbytes > size ) { 123f38cfb2564f5fead53eebd9617258ee0376b1906Fabian Frederick pr_warn("downcall opc %d, uniq %d, too much!", 124d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick hdr.opcode, hdr.unique); 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nbytes = size; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CODA_ALLOC(dcbuf, union outputArgs *, nbytes); 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(dcbuf, buf, nbytes)) { 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CODA_FREE(dcbuf, nbytes); 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EFAULT; 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* what downcall errors does Venus handle ? */ 135f7cc02b8715618e179242ba9cc10bdc5146ae565Yoshihisa Abe error = coda_downcall(vcp, hdr.opcode, dcbuf); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CODA_FREE(dcbuf, nbytes); 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (error) { 1396d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: coda_downcall error: %d\n", 1406d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, error); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = error; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = nbytes; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Look for the message on the processing queue. */ 149da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each(lh, &vcp->vc_processing) { 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = list_entry(lh, struct upc_req , uc_chain); 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tmp->uc_unique == hdr.unique) { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req = tmp; 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&req->uc_chain); 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 158da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!req) { 1616d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: msg (%d, %d) not found\n", 1626d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, hdr.opcode, hdr.unique); 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ESRCH; 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* move data into response buffer. */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->uc_outSize < nbytes) { 1696d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: too much cnt: %d, cnt: %ld, opc: %d, uniq: %d.\n", 1706d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, req->uc_outSize, (long)nbytes, 1716d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick hdr.opcode, hdr.unique); 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nbytes = req->uc_outSize; /* don't have more space! */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_from_user(req->uc_data, buf, nbytes)) { 1754aeefdc69f7b6f3f287e6fd8d4b213953b9e92d8Jens Axboe req->uc_flags |= CODA_REQ_ABORT; 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&req->uc_sleep); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EFAULT; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* adjust outsize. is this useful ?? */ 182112d421df2fddc0278584b084f4fcfedd144c5f4Jan Harkes req->uc_outSize = nbytes; 183112d421df2fddc0278584b084f4fcfedd144c5f4Jan Harkes req->uc_flags |= CODA_REQ_WRITE; 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = nbytes; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Convert filedescriptor into a file handle */ 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->uc_opcode == CODA_OPEN_BY_FD) { 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct coda_open_by_fd_out *outp = 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct coda_open_by_fd_out *)req->uc_data; 19038c2e4370da495813ca93d7cad31ed5090e8c310Jan Harkes if (!outp->oh.result) 19138c2e4370da495813ca93d7cad31ed5090e8c310Jan Harkes outp->fh = fget(outp->fd); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&req->uc_sleep); 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return(count ? count : retval); 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Read a message from the kernel to Venus 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic ssize_t coda_psdev_read(struct file * file, char __user * buf, 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t nbytes, loff_t *off) 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DECLARE_WAITQUEUE(wait, current); 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct venus_comm *vcp = (struct venus_comm *) file->private_data; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct upc_req *req; 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t retval = 0, count = 0; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nbytes == 0) 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 214da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&vcp->vc_waitq, &wait); 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (list_empty(&vcp->vc_pending)) { 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (file->f_flags & O_NONBLOCK) { 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EAGAIN; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) { 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -ERESTARTSYS; 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 228da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule(); 230da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&vcp->vc_waitq, &wait); 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req = list_entry(vcp->vc_pending.next, struct upc_req,uc_chain); 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&req->uc_chain); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Move the input args into userspace */ 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = req->uc_inSize; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nbytes < req->uc_inSize) { 2456d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Venus read %ld bytes of %d in message\n", 2466d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, (long)nbytes, req->uc_inSize); 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = nbytes; 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (copy_to_user(buf, req->uc_data, count)) 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = -EFAULT; 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If request was not a signal, enqueue and don't free */ 2544aeefdc69f7b6f3f287e6fd8d4b213953b9e92d8Jens Axboe if (!(req->uc_flags & CODA_REQ_ASYNC)) { 2554aeefdc69f7b6f3f287e6fd8d4b213953b9e92d8Jens Axboe req->uc_flags |= CODA_REQ_READ; 2568e13059a37252c45ab7173a0e4bac05e4a444ab6Akinobu Mita list_add_tail(&(req->uc_chain), &vcp->vc_processing); 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr)); 26137461e1957e6262278342a0c1a78e46996b7ff88Jan Harkes kfree(req); 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 263da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (count ? count : retval); 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int coda_psdev_open(struct inode * inode, struct file * file) 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 26987065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes struct venus_comm *vcp; 27087065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes int idx, err; 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2729fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman if (task_active_pid_ns(current) != &init_pid_ns) 2739fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman return -EINVAL; 2749fd973e085f7759f710603422b2e11ad5f2e000dEric W. Biederman 275d83f5901bc0cd7131a3b8534169ee889efc4c257Eric W. Biederman if (current_user_ns() != &init_user_ns) 276d83f5901bc0cd7131a3b8534169ee889efc4c257Eric W. Biederman return -EINVAL; 277d83f5901bc0cd7131a3b8534169ee889efc4c257Eric W. Biederman 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = iminor(inode); 27987065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes if (idx < 0 || idx >= MAX_CODADEVS) 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28287065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes err = -EBUSY; 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vcp = &coda_comms[idx]; 284da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 285da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe 28687065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes if (!vcp->vc_inuse) { 28787065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes vcp->vc_inuse++; 28887065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&vcp->vc_pending); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&vcp->vc_processing); 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&vcp->vc_waitq); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vcp->vc_sb = NULL; 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vcp->vc_seq = 0; 29487065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes 29587065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes file->private_data = vcp; 29687065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes err = 0; 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 299da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 30087065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes return err; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int coda_psdev_release(struct inode * inode, struct file * file) 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30687065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes struct venus_comm *vcp = (struct venus_comm *) file->private_data; 30787065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes struct upc_req *req, *tmp; 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30987065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes if (!vcp || !vcp->vc_inuse ) { 3106d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_warn("%s: Not open.\n", __func__); 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 314da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_lock(&vcp->vc_mutex); 31587065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes 31687065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes /* Wakeup clients so they can return. */ 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry_safe(req, tmp, &vcp->vc_pending, uc_chain) { 31887065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes list_del(&req->uc_chain); 31987065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Async requests need to be freed here */ 3214aeefdc69f7b6f3f287e6fd8d4b213953b9e92d8Jens Axboe if (req->uc_flags & CODA_REQ_ASYNC) { 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr)); 32337461e1957e6262278342a0c1a78e46996b7ff88Jan Harkes kfree(req); 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3264aeefdc69f7b6f3f287e6fd8d4b213953b9e92d8Jens Axboe req->uc_flags |= CODA_REQ_ABORT; 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up(&req->uc_sleep); 32887065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes } 32987065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes 33087065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes list_for_each_entry_safe(req, tmp, &vcp->vc_processing, uc_chain) { 33187065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes list_del(&req->uc_chain); 33287065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes 3334aeefdc69f7b6f3f287e6fd8d4b213953b9e92d8Jens Axboe req->uc_flags |= CODA_REQ_ABORT; 33487065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes wake_up(&req->uc_sleep); 33587065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes } 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33787065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes file->private_data = NULL; 33887065519633af79e0577e32a58dcd9cf3c45a8a0Jan Harkes vcp->vc_inuse--; 339da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_unlock(&vcp->vc_mutex); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3444b6f5d20b04dcbc3d888555522b90ba6d36c4106Arjan van de Venstatic const struct file_operations coda_psdev_fops = { 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .read = coda_psdev_read, 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write = coda_psdev_write, 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .poll = coda_psdev_poll, 349977183902a52d1e0adc986f9462424db5a545044Arnd Bergmann .unlocked_ioctl = coda_psdev_ioctl, 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = coda_psdev_open, 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = coda_psdev_release, 3526038f373a3dc1f1c26496e60b6c40b164716f07eArnd Bergmann .llseek = noop_llseek, 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int init_coda_psdev(void) 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, err = 0; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (register_chrdev(CODA_PSDEV_MAJOR, "coda", &coda_psdev_fops)) { 3596d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick pr_err("%s: unable to get major %d\n", 3606d6bd94f4d83d70cdff67d0bf2a64ef6878216e7Fabian Frederick __func__, CODA_PSDEV_MAJOR); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3631db560afe629b682c45a7f4ba7edf98b4ee28518Greg Kroah-Hartman coda_psdev_class = class_create(THIS_MODULE, "coda"); 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(coda_psdev_class)) { 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = PTR_ERR(coda_psdev_class); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out_chrdev; 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 368da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe for (i = 0; i < MAX_CODADEVS; i++) { 369da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe mutex_init(&(&coda_comms[i])->vc_mutex); 370a9b12619f7b6f19c871437ec24a088787a04b1deGreg Kroah-Hartman device_create(coda_psdev_class, NULL, 371a9b12619f7b6f19c871437ec24a088787a04b1deGreg Kroah-Hartman MKDEV(CODA_PSDEV_MAJOR, i), NULL, "cfs%d", i); 372da47c19e5c746829042933c8f945a71e2b62d6fcYoshihisa Abe } 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_sysctl_init(); 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout_chrdev: 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3825b7f13bd26a0c1d394a1a1f2bb6de5130c3a3843Jan HarkesMODULE_AUTHOR("Jan Harkes, Peter J. Braam"); 3835b7f13bd26a0c1d394a1a1f2bb6de5130c3a3843Jan HarkesMODULE_DESCRIPTION("Coda Distributed File System VFS interface"); 3845b7f13bd26a0c1d394a1a1f2bb6de5130c3a3843Jan HarkesMODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR); 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 3865b7f13bd26a0c1d394a1a1f2bb6de5130c3a3843Jan HarkesMODULE_VERSION("6.6"); 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init init_coda(void) 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status; 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = coda_init_inodecache(); 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out2; 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = init_coda_psdev(); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ( status ) { 398d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick pr_warn("Problem (%d) in init_coda_psdev\n", status); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out1; 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = register_filesystem(&coda_fs_type); 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) { 404f38cfb2564f5fead53eebd9617258ee0376b1906Fabian Frederick pr_warn("failed to register filesystem!\n"); 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 4098ab5e4c15b53e147c08031a959d9f776823dbe73Greg Kroah-Hartman for (i = 0; i < MAX_CODADEVS; i++) 41062ca8792560e5bd7dc09f54ed3523a7864f416c7Kay Sievers device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); 4111db560afe629b682c45a7f4ba7edf98b4ee28518Greg Kroah-Hartman class_destroy(coda_psdev_class); 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_sysctl_clean(); 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout1: 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_destroy_inodecache(); 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout2: 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return status; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit exit_coda(void) 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err, i; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = unregister_filesystem(&coda_fs_type); 425d9b4b3195a06e646c357f6108a424569b1a920d9Fabian Frederick if (err != 0) 426f38cfb2564f5fead53eebd9617258ee0376b1906Fabian Frederick pr_warn("failed to unregister filesystem\n"); 4278ab5e4c15b53e147c08031a959d9f776823dbe73Greg Kroah-Hartman for (i = 0; i < MAX_CODADEVS; i++) 42862ca8792560e5bd7dc09f54ed3523a7864f416c7Kay Sievers device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i)); 4291db560afe629b682c45a7f4ba7edf98b4ee28518Greg Kroah-Hartman class_destroy(coda_psdev_class); 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_chrdev(CODA_PSDEV_MAJOR, "coda"); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_sysctl_clean(); 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds coda_destroy_inodecache(); 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(init_coda); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(exit_coda); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 438