xnu-517.3.15.tar.gz

[apple/xnu.git] / bsd / miscfs / devfs / devfs_tree.c

diff --git a/bsd/miscfs/devfs/devfs_tree.c b/bsd/miscfs/devfs/devfs_tree.c
index 8a335534a9dfa34629c20972854498c30d4d2e5f..082fa947ec66f125b8946cd1fa95693f367a7900 100644 (file)
--- a/bsd/miscfs/devfs/devfs_tree.c
+++ b/bsd/miscfs/devfs/devfs_tree.c
@@ -3,19 +3,22 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -96,7 +99,7 @@ struct devfs_stats    devfs_stats;            /* hold stats */
 
 #ifdef HIDDEN_MOUNTPOINT
 static struct mount *devfs_hidden_mount;
-#endif HIDDEN_MOINTPOINT
+#endif /* HIDDEN_MOINTPOINT */
 
 static int devfs_ready = 0;
 
@@ -126,10 +129,15 @@ devfs_sinit(void)
        MALLOC(devfs_hidden_mount, struct mount *, sizeof(struct mount),
               M_MOUNT, M_WAITOK);
        bzero(devfs_hidden_mount,sizeof(struct mount));
+
+    /* Initialize the default IO constraints */
+    mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
+    mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
+
        devfs_mount(devfs_hidden_mount,"dummy",NULL,NULL,NULL);
        dev_root->de_dnp->dn_dvm 
            = (struct devfsmount *)devfs_hidden_mount->mnt_data;
-#endif HIDDEN_MOUNTPOINT
+#endif /* HIDDEN_MOUNTPOINT */
        devfs_ready = 1;
        return (0);
 }
@@ -279,7 +287,7 @@ dev_finddir(char * orig_path,       /* find this dir (err if not dir) */
                return 0;
        }
 }
-#endif 0
+#endif
 /***********************************************************************\
 * Given a starting node (0 for root) and a pathname, return the node   *
 * for the end item on the path. It MUST BE A DIRECTORY. If the 'CREATE'        *
@@ -330,6 +338,7 @@ dev_finddir(char * path,
                scan++;
 
            strncpy(component, start, scan - start);
+               component[ scan - start ] = '\0';
            if (*scan == '/')
                scan++;
 
@@ -662,14 +671,14 @@ devfs_dn_free(devnode_t * dnp)
                if (dnp->dn_vn == NULL) {
 #if 0
                    printf("devfs_dn_free: free'ing %x\n", (unsigned int)dnp);
-#endif 0
+#endif
                    devnode_free(dnp); /* no accesses/references */
                }
                else {
 #if 0
                    printf("devfs_dn_free: marking %x for deletion\n",
                           (unsigned int)dnp);
-#endif 0
+#endif
                    dnp->dn_delete = TRUE;
                }
        }
@@ -740,6 +749,7 @@ devfs_remove(void *dirent_p)
        devnode_t * dnp = ((devdirent_t *)dirent_p)->de_dnp;
        devnode_t * dnp2;
        boolean_t   funnel_state;
+       boolean_t   lastlink;
 
        funnel_state = thread_funnel_set(kernel_flock, TRUE);
 
@@ -760,8 +770,11 @@ devfs_remove(void *dirent_p)
                dnp->dn_nextsibling->dn_prevsiblingp = &(dnp->dn_nextsibling);
                dnp2->dn_nextsibling = dnp2;
                dnp2->dn_prevsiblingp = &(dnp2->dn_nextsibling);
-               while(dnp2->dn_linklist) {
-                       dev_free_name(dnp2->dn_linklist);
+               if(dnp2->dn_linklist) {
+                       do {
+                               lastlink = (1 == dnp2->dn_links);
+                               dev_free_name(dnp2->dn_linklist);
+                       } while (!lastlink);
                }
        }
 
@@ -770,8 +783,11 @@ devfs_remove(void *dirent_p)
         * If we are not running in SPLIT_DEVS mode, then
         * THIS is what gets rid of the propogated nodes.
         */
-       while(dnp->dn_linklist) {
-               dev_free_name(dnp->dn_linklist);
+       if(dnp->dn_linklist) {
+               do {
+                       lastlink = (1 == dnp->dn_links);
+                       dev_free_name(dnp->dn_linklist);
+               } while (!lastlink);
        }
        DEVFS_UNLOCK(0);
 out:
@@ -1046,8 +1062,6 @@ dev_add_entry(char *name, devnode_t * parent, int type, devnode_type_t * typeinf
        return error;
 }
 
-#include <sys/subr_prf.h>
-
 /*
  * Function: devfs_make_node
  *
@@ -1072,7 +1086,6 @@ devfs_make_node(dev_t dev, int chrblk, uid_t uid,
        devnode_type_t  typeinfo;
 
        char *name, *path, buf[256]; /* XXX */
-       char * b_ptr = buf;
        boolean_t   funnel_state;
        int i;
        va_list ap;
@@ -1088,9 +1101,8 @@ devfs_make_node(dev_t dev, int chrblk, uid_t uid,
                goto out;
 
        va_start(ap, fmt);
-       prf(fmt, ap, TOSTR, (struct tty *)&b_ptr);
+       vsnprintf(buf, sizeof(buf), fmt, ap);
        va_end(ap);
-       *b_ptr = 0;
 
        name = NULL;
 
@@ -1147,7 +1159,6 @@ devfs_make_link(void *original, char *fmt, ...)
 
        va_list ap;
        char *p, buf[256]; /* XXX */
-       char * b_ptr = buf;
        int i;
        boolean_t   funnel_state;
 
@@ -1159,9 +1170,8 @@ devfs_make_link(void *original, char *fmt, ...)
        }
 
        va_start(ap, fmt);
-       prf(fmt, ap, TOSTR, (struct tty *)&b_ptr);
+       vsnprintf(buf, sizeof(buf), fmt, ap);
        va_end(ap);
-       *b_ptr = 0;
 
        p = NULL;