super.c (2744B)
1 /* $Id: //depot/blt/srv/vfs/super.c#5 $ 2 ** 3 ** Copyright 1999 Sidney Cammeresi 4 ** All rights reserved. 5 ** 6 ** Redistribution and use in source and binary forms, with or without 7 ** modification, are permitted provided that the following conditions 8 ** are met: 9 ** 1. Redistributions of source code must retain the above copyright 10 ** notice, this list of conditions, and the following disclaimer. 11 ** 2. Redistributions in binary form must reproduce the above copyright 12 ** notice, this list of conditions, and the following disclaimer in the 13 ** documentation and/or other materials provided with the distribution. 14 ** 3. The name of the author may not be used to endorse or promote products 15 ** derived from this software without specific prior written permission. 16 ** 17 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include "vfs-int.h" 33 34 int vfs_mount (const char *dir, const char *type, int flags, const void *data) 35 { 36 int res; 37 static int rootmounted = 0; 38 struct fs_type *driver; 39 struct superblock *super; 40 41 #ifdef VFS_DEBUG 42 printf ("vfs_mount %s %s\n", dir, type); 43 #endif 44 45 /* find filesystem driver */ 46 driver = fs_drivers; 47 while (driver != NULL) 48 { 49 if (!strcmp (driver->name, type)) 50 break; 51 else 52 driver = driver->next; 53 } 54 if (driver == NULL) 55 { 56 printf ("vfs: no driver\n"); 57 return 1; 58 } 59 super = malloc (sizeof (struct superblock)); 60 super->sb_vops = driver->t_vops; 61 62 super->sb_dir = malloc (strlen (dir) + 1); 63 strcpy (super->sb_dir, dir); 64 65 /* verify mount point existence */ 66 if (!rootmounted) 67 { 68 rootmounted = 1; 69 super->sb_dev = "none"; 70 } 71 else 72 { 73 super->sb_dev = "none"; 74 } 75 76 super->sb_vnode_cache = hashtable_new (0.75); 77 super->sb_next = NULL; 78 res = driver->t_vops->mount (super, data, 1); 79 if (!res) 80 { 81 if (mount_list != NULL) 82 super->sb_next = mount_list; 83 mount_list = super; 84 if (strcmp (type, "rootfs") && strcmp (type, "bootfs")) 85 printf ("vfs: mounted type %s on %s from %s\n", type, 86 super->sb_dir, super->sb_dev); 87 } 88 return res; 89 } 90