diff options
Diffstat (limited to 'fs/namespace.c')
-rw-r--r-- | fs/namespace.c | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index f7ec283ccfbb..1e56303c718e 100644 --- a/fs/namespace.c +++ b/fs/namespace.c | |||
@@ -2093,74 +2093,6 @@ out1: | |||
2093 | } | 2093 | } |
2094 | 2094 | ||
2095 | /* | 2095 | /* |
2096 | * Replace the fs->{rootmnt,root} with {mnt,dentry}. Put the old values. | ||
2097 | * It can block. Requires the big lock held. | ||
2098 | */ | ||
2099 | void set_fs_root(struct fs_struct *fs, struct path *path) | ||
2100 | { | ||
2101 | struct path old_root; | ||
2102 | |||
2103 | write_lock(&fs->lock); | ||
2104 | old_root = fs->root; | ||
2105 | fs->root = *path; | ||
2106 | path_get(path); | ||
2107 | write_unlock(&fs->lock); | ||
2108 | if (old_root.dentry) | ||
2109 | path_put(&old_root); | ||
2110 | } | ||
2111 | |||
2112 | /* | ||
2113 | * Replace the fs->{pwdmnt,pwd} with {mnt,dentry}. Put the old values. | ||
2114 | * It can block. Requires the big lock held. | ||
2115 | */ | ||
2116 | void set_fs_pwd(struct fs_struct *fs, struct path *path) | ||
2117 | { | ||
2118 | struct path old_pwd; | ||
2119 | |||
2120 | write_lock(&fs->lock); | ||
2121 | old_pwd = fs->pwd; | ||
2122 | fs->pwd = *path; | ||
2123 | path_get(path); | ||
2124 | write_unlock(&fs->lock); | ||
2125 | |||
2126 | if (old_pwd.dentry) | ||
2127 | path_put(&old_pwd); | ||
2128 | } | ||
2129 | |||
2130 | static void chroot_fs_refs(struct path *old_root, struct path *new_root) | ||
2131 | { | ||
2132 | struct task_struct *g, *p; | ||
2133 | struct fs_struct *fs; | ||
2134 | int count = 0; | ||
2135 | |||
2136 | read_lock(&tasklist_lock); | ||
2137 | do_each_thread(g, p) { | ||
2138 | task_lock(p); | ||
2139 | fs = p->fs; | ||
2140 | if (fs) { | ||
2141 | write_lock(&fs->lock); | ||
2142 | if (fs->root.dentry == old_root->dentry | ||
2143 | && fs->root.mnt == old_root->mnt) { | ||
2144 | path_get(new_root); | ||
2145 | fs->root = *new_root; | ||
2146 | count++; | ||
2147 | } | ||
2148 | if (fs->pwd.dentry == old_root->dentry | ||
2149 | && fs->pwd.mnt == old_root->mnt) { | ||
2150 | path_get(new_root); | ||
2151 | fs->pwd = *new_root; | ||
2152 | count++; | ||
2153 | } | ||
2154 | write_unlock(&fs->lock); | ||
2155 | } | ||
2156 | task_unlock(p); | ||
2157 | } while_each_thread(g, p); | ||
2158 | read_unlock(&tasklist_lock); | ||
2159 | while (count--) | ||
2160 | path_put(old_root); | ||
2161 | } | ||
2162 | |||
2163 | /* | ||
2164 | * pivot_root Semantics: | 2096 | * pivot_root Semantics: |
2165 | * Moves the root file system of the current process to the directory put_old, | 2097 | * Moves the root file system of the current process to the directory put_old, |
2166 | * makes new_root as the new root file system of the current process, and sets | 2098 | * makes new_root as the new root file system of the current process, and sets |