diff options
Diffstat (limited to 'fs/init.c')
| -rw-r--r-- | fs/init.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/init.c b/fs/init.c index e0f5429c0a49..e33b2690d851 100644 --- a/fs/init.c +++ b/fs/init.c @@ -13,6 +13,23 @@ #include <linux/security.h> #include "internal.h" +int __init init_pivot_root(const char *new_root, const char *put_old) +{ + struct path new_path __free(path_put) = {}; + struct path old_path __free(path_put) = {}; + int ret; + + ret = kern_path(new_root, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &new_path); + if (ret) + return ret; + + ret = kern_path(put_old, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &old_path); + if (ret) + return ret; + + return path_pivot_root(&new_path, &old_path); +} + int __init init_mount(const char *dev_name, const char *dir_name, const char *type_page, unsigned long flags, void *data_page) { |