xnu-6153.81.5.tar.gz

[apple/xnu.git] / bsd / kern / bsd_stubs.c

diff --git a/bsd/kern/bsd_stubs.c b/bsd/kern/bsd_stubs.c
index 7883a1b75278b5d771bafadad28cad03f0397a1d..f738345987418d3c0695399828f2186967cc7331 100644 (file)
--- a/bsd/kern/bsd_stubs.c
+++ b/bsd/kern/bsd_stubs.c
@@ -45,7 +45,7 @@
 
 /* XXX these should be in a common header somwhere, but aren't */
 extern int chrtoblk_set(int, int);
-extern vm_offset_t kmem_mb_alloc(vm_map_t, int, int);
+extern vm_offset_t kmem_mb_alloc(vm_map_t, int, int, kern_return_t *);
 
 /* XXX most of these just exist to export; there's no good header for them*/
 void pcb_synch(void);
@@ -58,18 +58,23 @@ lck_grp_t * devsw_lock_grp;
 int dmmin, dmmax, dmtext;
 
 vm_offset_t
-kmem_mb_alloc(vm_map_t mbmap, int size, int physContig)
+kmem_mb_alloc(vm_map_t mbmap, int size, int physContig, kern_return_t *err)
 {
        vm_offset_t addr = 0;
        kern_return_t kr = KERN_SUCCESS;
 
-       if (!physContig)
-               kr = kernel_memory_allocate(mbmap, &addr, size, 0, KMA_NOPAGEWAIT | KMA_KOBJECT | KMA_LOMEM, VM_KERN_MEMORY_MBUF);
-       else
-               kr = kmem_alloc_contig(mbmap, &addr, size, PAGE_MASK, 0xfffff, 0, KMA_NOPAGEWAIT | KMA_KOBJECT | KMA_LOMEM, VM_KERN_MEMORY_MBUF);
+       if (!physContig) {
+               kr = kernel_memory_allocate(mbmap, &addr, size, 0, KMA_KOBJECT | KMA_LOMEM, VM_KERN_MEMORY_MBUF);
+       } else {
+               kr = kmem_alloc_contig(mbmap, &addr, size, PAGE_MASK, 0xfffff, 0, KMA_KOBJECT | KMA_LOMEM, VM_KERN_MEMORY_MBUF);
+       }
 
-       if (kr != KERN_SUCCESS)
+       if (kr != KERN_SUCCESS) {
                addr = 0;
+       }
+       if (err) {
+               *err = kr;
+       }
 
        return addr;
 }
@@ -93,19 +98,22 @@ current_proc(void)
        ut = (struct uthread *)get_bsdthread_info(thread);
        if (ut && (ut->uu_flag & UT_VFORK) && ut->uu_proc) {
                p = ut->uu_proc;
-               if ((p->p_lflag & P_LINVFORK) == 0)
+               if ((p->p_lflag & P_LINVFORK) == 0) {
                        panic("returning child proc not under vfork");
-               if (p->p_vforkact != (void *)thread)
+               }
+               if (p->p_vforkact != (void *)thread) {
                        panic("returning child proc which is not cur_act");
-               return (p);
+               }
+               return p;
        }
 
        p = (struct proc *)get_bsdtask_info(current_task());
 
-       if (p == NULL)
-               return (kernproc);
+       if (p == NULL) {
+               return kernproc;
+       }
 
-       return (p);
+       return p;
 }
 
 /* Device switch add delete routines */
@@ -127,25 +135,28 @@ bdevsw_isfree(int index)
        struct bdevsw * devsw;
 
        if (index < 0) {
-               if (index == -1)
+               if (index == -1) {
                        index = 1; /* start at 1 to avoid collision with volfs (Radar 2842228) */
-               else
+               } else {
                        index = -index; /* start at least this far up in the table */
+               }
                devsw = &bdevsw[index];
                for (; index < nblkdev; index++, devsw++) {
-                       if (memcmp((char *)devsw, (char *)&nobdev, sizeof(struct bdevsw)) == 0)
+                       if (memcmp((char *)devsw, (char *)&nobdev, sizeof(struct bdevsw)) == 0) {
                                break;
+                       }
                }
        }
 
-       if (index < 0 || index >= nblkdev)
-               return (-1);
+       if (index < 0 || index >= nblkdev) {
+               return -1;
+       }
 
        devsw = &bdevsw[index];
        if ((memcmp((char *)devsw, (char *)&nobdev, sizeof(struct bdevsw)) != 0)) {
-               return (-1);
+               return -1;
        }
-       return (index);
+       return index;
 }
 
 /*
@@ -168,7 +179,7 @@ bdevsw_add(int index, struct bdevsw * bsw)
                bdevsw[index] = *bsw;
        }
        lck_mtx_unlock(&devsw_lock_list_mtx);
-       return (index);
+       return index;
 }
 /*
  *     if the slot has the same bsw, then remove
@@ -179,8 +190,9 @@ bdevsw_remove(int index, struct bdevsw * bsw)
 {
        struct bdevsw * devsw;
 
-       if (index < 0 || index >= nblkdev)
-               return (-1);
+       if (index < 0 || index >= nblkdev) {
+               return -1;
+       }
 
        devsw = &bdevsw[index];
        lck_mtx_lock_spin(&devsw_lock_list_mtx);
@@ -190,7 +202,7 @@ bdevsw_remove(int index, struct bdevsw * bsw)
                bdevsw[index] = nobdev;
        }
        lck_mtx_unlock(&devsw_lock_list_mtx);
-       return (index);
+       return index;
 }
 
 /*
@@ -208,25 +220,28 @@ cdevsw_isfree(int index)
        struct cdevsw * devsw;
 
        if (index < 0) {
-               if (index == -1)
+               if (index == -1) {
                        index = 0;
-               else
+               } else {
                        index = -index; /* start at least this far up in the table */
+               }
                devsw = &cdevsw[index];
                for (; index < nchrdev; index++, devsw++) {
-                       if (memcmp((char *)devsw, (char *)&nocdev, sizeof(struct cdevsw)) == 0)
+                       if (memcmp((char *)devsw, (char *)&nocdev, sizeof(struct cdevsw)) == 0) {
                                break;
+                       }
                }
        }
 
-       if (index < 0 || index >= nchrdev)
-               return (-1);
+       if (index < 0 || index >= nchrdev) {
+               return -1;
+       }
 
        devsw = &cdevsw[index];
        if ((memcmp((char *)devsw, (char *)&nocdev, sizeof(struct cdevsw)) != 0)) {
-               return (-1);
+               return -1;
        }
-       return (index);
+       return index;
 }
 
 /*
@@ -254,7 +269,7 @@ cdevsw_add(int index, struct cdevsw * csw)
                cdevsw[index] = *csw;
        }
        lck_mtx_unlock(&devsw_lock_list_mtx);
-       return (index);
+       return index;
 }
 /*
  *     if the slot has the same csw, then remove
@@ -265,8 +280,9 @@ cdevsw_remove(int index, struct cdevsw * csw)
 {
        struct cdevsw * devsw;
 
-       if (index < 0 || index >= nchrdev)
-               return (-1);
+       if (index < 0 || index >= nchrdev) {
+               return -1;
+       }
 
        devsw = &cdevsw[index];
        lck_mtx_lock_spin(&devsw_lock_list_mtx);
@@ -277,13 +293,13 @@ cdevsw_remove(int index, struct cdevsw * csw)
                cdevsw_flags[index] = 0;
        }
        lck_mtx_unlock(&devsw_lock_list_mtx);
-       return (index);
+       return index;
 }
 
 static int
 cdev_set_bdev(int cdev, int bdev)
 {
-       return (chrtoblk_set(cdev, bdev));
+       return chrtoblk_set(cdev, bdev);
 }
 
 int
@@ -291,13 +307,13 @@ cdevsw_add_with_bdev(int index, struct cdevsw * csw, int bdev)
 {
        index = cdevsw_add(index, csw);
        if (index < 0) {
-               return (index);
+               return index;
        }
        if (cdev_set_bdev(index, bdev) < 0) {
                cdevsw_remove(index, csw);
-               return (-1);
+               return -1;
        }
-       return (index);
+       return index;
 }
 
 int
@@ -332,16 +348,21 @@ cdevsw_setkqueueok(int maj, struct cdevsw * csw, int extra_flags)
 int
 bsd_hostname(char * buf, int bufsize, int * len)
 {
+       int ret, hnlen;
        /*
-        * "hostname" is null-terminated, and "hostnamelen" is equivalent to strlen(hostname).
+        * "hostname" is null-terminated
         */
-       if (hostnamelen < bufsize) {
+       lck_mtx_lock(&hostname_lock);
+       hnlen = strlen(hostname);
+       if (hnlen < bufsize) {
                strlcpy(buf, hostname, bufsize);
-               *len = hostnamelen;
-               return 0;
+               *len = hnlen;
+               ret = 0;
        } else {
-               return ENAMETOOLONG;
+               ret = ENAMETOOLONG;
        }
+       lck_mtx_unlock(&hostname_lock);
+       return ret;
 }
 
 void