Merge branch 'for_linus' of git://git.infradead.org/~dedekind/ubifs-2.6

[pandora-kernel.git] / fs / filesystems.c

diff --git a/fs/filesystems.c b/fs/filesystems.c
index 9f10728..f37f872 100644 (file)
--- a/fs/filesystems.c
+++ b/fs/filesystems.c
@@ -12,7 +12,6 @@
 #include <linux/kmod.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/sched.h>       /* for 'current' */
 #include <asm/uaccess.h>
 
 /*
@@ -42,11 +41,12 @@ void put_filesystem(struct file_system_type *fs)
        module_put(fs->owner);
 }
 
-static struct file_system_type **find_filesystem(const char *name)
+static struct file_system_type **find_filesystem(const char *name, unsigned len)
 {
        struct file_system_type **p;
        for (p=&file_systems; *p; p=&(*p)->next)
-               if (strcmp((*p)->name,name) == 0)
+               if (strlen((*p)->name) == len &&
+                   strncmp((*p)->name, name, len) == 0)
                        break;
        return p;
 }
@@ -69,13 +69,12 @@ int register_filesystem(struct file_system_type * fs)
        int res = 0;
        struct file_system_type ** p;
 
-       if (!fs)
-               return -EINVAL;
+       BUG_ON(strchr(fs->name, '.'));
        if (fs->next)
                return -EBUSY;
        INIT_LIST_HEAD(&fs->fs_supers);
        write_lock(&file_systems_lock);
-       p = find_filesystem(fs->name);
+       p = find_filesystem(fs->name, strlen(fs->name));
        if (*p)
                res = -EBUSY;
        else
@@ -218,19 +217,26 @@ int get_filesystem_list(char * buf)
 struct file_system_type *get_fs_type(const char *name)
 {
        struct file_system_type *fs;
+       const char *dot = strchr(name, '.');
+       unsigned len = dot ? dot - name : strlen(name);
 
        read_lock(&file_systems_lock);
-       fs = *(find_filesystem(name));
+       fs = *(find_filesystem(name, len));
        if (fs && !try_module_get(fs->owner))
                fs = NULL;
        read_unlock(&file_systems_lock);
-       if (!fs && (request_module("%s", name) == 0)) {
+       if (!fs && (request_module("%.*s", len, name) == 0)) {
                read_lock(&file_systems_lock);
-               fs = *(find_filesystem(name));
+               fs = *(find_filesystem(name, len));
                if (fs && !try_module_get(fs->owner))
                        fs = NULL;
                read_unlock(&file_systems_lock);
        }
+
+       if (dot && fs && !(fs->fs_flags & FS_HAS_SUBTYPE)) {
+               put_filesystem(fs);
+               fs = NULL;
+       }
        return fs;
 }