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-rw-r--r--init/Kconfig1
-rw-r--r--init/do_mounts.c108
2 files changed, 9 insertions, 100 deletions
diff --git a/init/Kconfig b/init/Kconfig
index b9d11a899b88..f5becd2a12f6 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -363,6 +363,7 @@ config CGROUP_CPUACCT
config SYSFS_DEPRECATED
bool "Create deprecated sysfs files"
+ depends on SYSFS
default y
help
This option creates deprecated symlinks such as the
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 31b2185ce304..1161dfd7b0d3 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -55,69 +55,6 @@ static int __init readwrite(char *str)
__setup("ro", readonly);
__setup("rw", readwrite);
-static dev_t try_name(char *name, int part)
-{
- char path[64];
- char buf[32];
- int range;
- dev_t res;
- char *s;
- int len;
- int fd;
- unsigned int maj, min;
-
- /* read device number from .../dev */
-
- sprintf(path, "/sys/block/%s/dev", name);
- fd = sys_open(path, 0, 0);
- if (fd < 0)
- goto fail;
- len = sys_read(fd, buf, 32);
- sys_close(fd);
- if (len <= 0 || len == 32 || buf[len - 1] != '\n')
- goto fail;
- buf[len - 1] = '\0';
- if (sscanf(buf, "%u:%u", &maj, &min) == 2) {
- /*
- * Try the %u:%u format -- see print_dev_t()
- */
- res = MKDEV(maj, min);
- if (maj != MAJOR(res) || min != MINOR(res))
- goto fail;
- } else {
- /*
- * Nope. Try old-style "0321"
- */
- res = new_decode_dev(simple_strtoul(buf, &s, 16));
- if (*s)
- goto fail;
- }
-
- /* if it's there and we are not looking for a partition - that's it */
- if (!part)
- return res;
-
- /* otherwise read range from .../range */
- sprintf(path, "/sys/block/%s/range", name);
- fd = sys_open(path, 0, 0);
- if (fd < 0)
- goto fail;
- len = sys_read(fd, buf, 32);
- sys_close(fd);
- if (len <= 0 || len == 32 || buf[len - 1] != '\n')
- goto fail;
- buf[len - 1] = '\0';
- range = simple_strtoul(buf, &s, 10);
- if (*s)
- goto fail;
-
- /* if partition is within range - we got it */
- if (part < range)
- return res + part;
-fail:
- return 0;
-}
-
/*
* Convert a name into device number. We accept the following variants:
*
@@ -129,12 +66,10 @@ fail:
* 5) /dev/<disk_name>p<decimal> - same as the above, that form is
* used when disk name of partitioned disk ends on a digit.
*
- * If name doesn't have fall into the categories above, we return 0.
- * Sysfs is used to check if something is a disk name - it has
- * all known disks under bus/block/devices. If the disk name
- * contains slashes, name of sysfs node has them replaced with
- * bangs. try_name() does the actual checks, assuming that sysfs
- * is mounted on rootfs /sys.
+ * If name doesn't have fall into the categories above, we return (0,0).
+ * block_class is used to check if something is a disk name. If the disk
+ * name contains slashes, the device name has them replaced with
+ * bangs.
*/
dev_t name_to_dev_t(char *name)
@@ -142,13 +77,6 @@ dev_t name_to_dev_t(char *name)
char s[32];
char *p;
dev_t res = 0;
- int part;
-
-#ifdef CONFIG_SYSFS
- int mkdir_err = sys_mkdir("/sys", 0700);
- if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
- goto out;
-#endif
if (strncmp(name, "/dev/", 5) != 0) {
unsigned maj, min;
@@ -164,6 +92,7 @@ dev_t name_to_dev_t(char *name)
}
goto done;
}
+
name += 5;
res = Root_NFS;
if (strcmp(name, "nfs") == 0)
@@ -178,35 +107,14 @@ dev_t name_to_dev_t(char *name)
for (p = s; *p; p++)
if (*p == '/')
*p = '!';
- res = try_name(s, 0);
+ res = blk_lookup_devt(s);
if (res)
goto done;
- while (p > s && isdigit(p[-1]))
- p--;
- if (p == s || !*p || *p == '0')
- goto fail;
- part = simple_strtoul(p, NULL, 10);
- *p = '\0';
- res = try_name(s, part);
- if (res)
- goto done;
-
- if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
- goto fail;
- p[-1] = '\0';
- res = try_name(s, part);
+fail:
+ return 0;
done:
-#ifdef CONFIG_SYSFS
- sys_umount("/sys", 0);
-out:
- if (!mkdir_err)
- sys_rmdir("/sys");
-#endif
return res;
-fail:
- res = 0;
- goto done;
}
static int __init root_dev_setup(char *line)