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Annotation of Gnu-Mach/i386/i386at/gpl/linux/linux_misc.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Miscellaneous routines and data for Linux emulation.
        !             3:  *
        !             4:  * Copyright (C) 1996 The University of Utah and the Computer Systems
        !             5:  * Laboratory at the University of Utah (CSL)
        !             6:  *
        !             7:  * This program is free software; you can redistribute it and/or modify
        !             8:  * it under the terms of the GNU General Public License as published by
        !             9:  * the Free Software Foundation; either version 2, or (at your option)
        !            10:  * any later version.
        !            11:  *
        !            12:  * This program is distributed in the hope that it will be useful,
        !            13:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15:  * GNU General Public License for more details.
        !            16:  *
        !            17:  * You should have received a copy of the GNU General Public License
        !            18:  * along with this program; if not, write to the Free Software
        !            19:  * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
        !            20:  *
        !            21:  *      Author: Shantanu Goel, University of Utah CSL
        !            22:  */
        !            23: 
        !            24: /*
        !            25:  *  linux/fs/proc/scsi.c  
        !            26:  *  (c) 1995 Michael Neuffer [email protected]
        !            27:  *
        !            28:  *  The original version was derived from linux/fs/proc/net.c,
        !            29:  *  which is Copyright (C) 1991, 1992 Linus Torvalds. 
        !            30:  *  Much has been rewritten, but some of the code still remains.
        !            31:  *
        !            32:  *  /proc/scsi directory handling functions
        !            33:  *
        !            34:  *  last change: 95/07/04    
        !            35:  *
        !            36:  *  Initial version: March '95
        !            37:  *  95/05/15 Added subdirectories for each driver and show every
        !            38:  *          registered HBA as a single file. 
        !            39:  *  95/05/30 Added rudimentary write support for parameter passing
        !            40:  *  95/07/04 Fixed bugs in directory handling
        !            41:  *  95/09/13 Update to support the new proc-dir tree
        !            42:  *
        !            43:  *  TODO: Improve support to write to the driver files
        !            44:  *       Add some more comments
        !            45:  */
        !            46: 
        !            47: /*
        !            48:  *  linux/fs/buffer.c
        !            49:  *
        !            50:  *  Copyright (C) 1991, 1992  Linus Torvalds
        !            51:  */
        !            52: 
        !            53: #include <sys/types.h>
        !            54: #include <mach/vm_param.h>
        !            55: #include <kern/thread.h>
        !            56: #include <vm/vm_map.h>
        !            57: #include <vm/vm_page.h>
        !            58: #include <device/device_types.h>
        !            59: #include <i386at/gpl/linux/linux_emul.h>
        !            60: 
        !            61: #define MACH_INCLUDE
        !            62: #include <linux/errno.h>
        !            63: #include <linux/mm.h>
        !            64: #include <linux/fs.h>
        !            65: #include <linux/blk.h>
        !            66: #include <linux/proc_fs.h>
        !            67: #include <linux/kernel_stat.h>
        !            68: 
        !            69: int (*dispatch_scsi_info_ptr) (int ino, char *buffer, char **start,
        !            70:                               off_t offset, int length, int inout) = 0;
        !            71: 
        !            72: struct kernel_stat kstat;
        !            73: 
        !            74: int
        !            75: linux_to_mach_error (int err)
        !            76: {
        !            77:   switch (err)
        !            78:     {
        !            79:     case 0:
        !            80:       return D_SUCCESS;
        !            81: 
        !            82:     case -LINUX_EPERM:
        !            83:       return D_INVALID_OPERATION;
        !            84: 
        !            85:     case -LINUX_EIO:
        !            86:       return D_IO_ERROR;
        !            87: 
        !            88:     case -LINUX_ENXIO:
        !            89:       return D_NO_SUCH_DEVICE;
        !            90: 
        !            91:     case -LINUX_EACCES:
        !            92:       return D_INVALID_OPERATION;
        !            93: 
        !            94:     case -LINUX_EFAULT:
        !            95:       return D_INVALID_SIZE;
        !            96: 
        !            97:     case -LINUX_EBUSY:
        !            98:       return D_ALREADY_OPEN;
        !            99: 
        !           100:     case -LINUX_EINVAL:
        !           101:       return D_INVALID_SIZE;
        !           102: 
        !           103:     case -LINUX_EROFS:
        !           104:       return D_READ_ONLY;
        !           105: 
        !           106:     case -LINUX_EWOULDBLOCK:
        !           107:       return D_WOULD_BLOCK;
        !           108: 
        !           109:     default:
        !           110:       printf ("linux_to_mach_error: unknown code %d\n", err);
        !           111:       return D_IO_ERROR;
        !           112:     }
        !           113: }
        !           114: 
        !           115: int
        !           116: issig ()
        !           117: {
        !           118:   return current_thread ()->wait_result != THREAD_AWAKENED;
        !           119: }
        !           120: 
        !           121: int
        !           122: block_fsync (struct inode *inode, struct file *filp)
        !           123: {
        !           124:   return 0;
        !           125: }
        !           126: 
        !           127: int
        !           128: verify_area (int rw, const void *p, unsigned long size)
        !           129: {
        !           130:   vm_prot_t prot = (rw == VERIFY_WRITE) ? VM_PROT_WRITE : VM_PROT_READ;
        !           131:   vm_offset_t addr = trunc_page ((vm_offset_t) p);
        !           132:   vm_size_t len = round_page ((vm_size_t) size);
        !           133:   vm_map_entry_t entry;
        !           134: 
        !           135:   vm_map_lock_read (current_map ());
        !           136: 
        !           137:   while (1)
        !           138:     {
        !           139:       if (! vm_map_lookup_entry (current_map (), addr, &entry)
        !           140:          || (entry->protection & prot) != prot)
        !           141:        {
        !           142:          vm_map_unlock_read (current_map ());
        !           143:          return -LINUX_EFAULT;
        !           144:        }
        !           145:       if (entry->vme_end - entry->vme_start >= len)
        !           146:        break;
        !           147:       len -= entry->vme_end - entry->vme_start;
        !           148:       addr += entry->vme_end - entry->vme_start;
        !           149:     }
        !           150: 
        !           151:   vm_map_unlock_read (current_map ());
        !           152:   return 0;
        !           153: }
        !           154: 
        !           155: /*
        !           156:  * Print device name (in decimal, hexadecimal or symbolic) -
        !           157:  * at present hexadecimal only.
        !           158:  * Note: returns pointer to static data!
        !           159:  */
        !           160: char *
        !           161: kdevname(kdev_t dev)
        !           162: {
        !           163:        static char buffer[32];
        !           164:        sprintf(buffer, "%02x:%02x", MAJOR(dev), MINOR(dev));
        !           165:        return buffer;
        !           166: }
        !           167: 
        !           168: /* RO fail safe mechanism */
        !           169: 
        !           170: static long ro_bits[MAX_BLKDEV][8];
        !           171: 
        !           172: int
        !           173: is_read_only(kdev_t dev)
        !           174: {
        !           175:        int minor,major;
        !           176: 
        !           177:        major = MAJOR(dev);
        !           178:        minor = MINOR(dev);
        !           179:        if (major < 0 || major >= MAX_BLKDEV) return 0;
        !           180:        return ro_bits[major][minor >> 5] & (1 << (minor & 31));
        !           181: }
        !           182: 
        !           183: void
        !           184: set_device_ro(kdev_t dev,int flag)
        !           185: {
        !           186:        int minor,major;
        !           187: 
        !           188:        major = MAJOR(dev);
        !           189:        minor = MINOR(dev);
        !           190:        if (major < 0 || major >= MAX_BLKDEV) return;
        !           191:        if (flag) ro_bits[major][minor >> 5] |= 1 << (minor & 31);
        !           192:        else ro_bits[major][minor >> 5] &= ~(1 << (minor & 31));
        !           193: }
        !           194: 
        !           195: /*
        !           196:  *  linux/lib/string.c
        !           197:  *
        !           198:  *  Copyright (C) 1991, 1992  Linus Torvalds
        !           199:  */
        !           200: 
        !           201: /*
        !           202:  * stupid library routines.. The optimized versions should generally be found
        !           203:  * as inline code in <asm-xx/string.h>
        !           204:  *
        !           205:  * These are buggy as well..
        !           206:  */
        !           207:  
        !           208: #include <linux/types.h>
        !           209: #include <linux/string.h>
        !           210: 
        !           211: char * ___strtok = NULL;
        !           212: 
        !           213: #ifndef __HAVE_ARCH_STRSPN
        !           214: size_t strspn(const char *s, const char *accept)
        !           215: {
        !           216:        const char *p;
        !           217:        const char *a;
        !           218:        size_t count = 0;
        !           219: 
        !           220:        for (p = s; *p != '\0'; ++p) {
        !           221:                for (a = accept; *a != '\0'; ++a) {
        !           222:                        if (*p == *a)
        !           223:                                break;
        !           224:                }
        !           225:                if (*a == '\0')
        !           226:                        return count;
        !           227:                ++count;
        !           228:        }
        !           229: 
        !           230:        return count;
        !           231: }
        !           232: #endif
        !           233: 
        !           234: #ifndef __HAVE_ARCH_STRPBRK
        !           235: char * strpbrk(const char * cs,const char * ct)
        !           236: {
        !           237:        const char *sc1,*sc2;
        !           238: 
        !           239:        for( sc1 = cs; *sc1 != '\0'; ++sc1) {
        !           240:                for( sc2 = ct; *sc2 != '\0'; ++sc2) {
        !           241:                        if (*sc1 == *sc2)
        !           242:                                return (char *) sc1;
        !           243:                }
        !           244:        }
        !           245:        return NULL;
        !           246: }
        !           247: #endif
        !           248: 
        !           249: #ifndef __HAVE_ARCH_STRTOK
        !           250: char * strtok(char * s,const char * ct)
        !           251: {
        !           252:        char *sbegin, *send;
        !           253: 
        !           254:        sbegin  = s ? s : ___strtok;
        !           255:        if (!sbegin) {
        !           256:                return NULL;
        !           257:        }
        !           258:        sbegin += strspn(sbegin,ct);
        !           259:        if (*sbegin == '\0') {
        !           260:                ___strtok = NULL;
        !           261:                return( NULL );
        !           262:        }
        !           263:        send = strpbrk( sbegin, ct);
        !           264:        if (send && *send != '\0')
        !           265:                *send++ = '\0';
        !           266:        ___strtok = send;
        !           267:        return (sbegin);
        !           268: }
        !           269: #endif
        !           270: 
        !           271: struct proc_dir_entry proc_scsi;
        !           272: struct inode_operations proc_scsi_inode_operations;
        !           273: struct proc_dir_entry proc_net;
        !           274: struct inode_operations proc_net_inode_operations;
        !           275: 
        !           276: int
        !           277: proc_register (struct proc_dir_entry *xxx1, struct proc_dir_entry *xxx2)
        !           278: {
        !           279:   return 0;
        !           280: }
        !           281: 
        !           282: int
        !           283: proc_unregister (struct proc_dir_entry *xxx1, int xxx2)
        !           284: {
        !           285:   return 0;
        !           286: }
        !           287: 
        !           288: void
        !           289: add_blkdev_randomness (int major)
        !           290: {
        !           291: }
        !           292: 
        !           293: void
        !           294: do_gettimeofday (struct timeval *tv)
        !           295: {
        !           296:   host_get_time (1, tv);
        !           297: }
        !           298: 
        !           299: int
        !           300: dev_get_info (char *buffer, char **start, off_t offset, int length, int dummy)
        !           301: {
        !           302:   return 0;
        !           303: }

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