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authorAl Viro <viro@zeniv.linux.org.uk>2009-03-29 19:00:13 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2009-03-31 23:00:26 -0400
commit3e93cd671813e204c258f1e6c797959920cf7772 (patch)
treea1e0b2d2da7d296cc1c53be9cd6efa5b94b01b5c /kernel/fork.c
parentf8ef3ed2bebd2c4cb9ece92efa185d7aead8831a (diff)
downloadlinux-3e93cd671813e204c258f1e6c797959920cf7772.tar.bz2
Take fs_struct handling to new file (fs/fs_struct.c)
Pure code move; two new helper functions for nfsd and daemonize (unshare_fs_struct() and daemonize_fs_struct() resp.; for now - the same code as used to be in callers). unshare_fs_struct() exported (for nfsd, as copy_fs_struct()/exit_fs() used to be), copy_fs_struct() and exit_fs() don't need exports anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c29
1 files changed, 2 insertions, 27 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 47c15840a381..05c02dc586b1 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -681,38 +681,13 @@ fail_nomem:
return retval;
}
-static struct fs_struct *__copy_fs_struct(struct fs_struct *old)
-{
- struct fs_struct *fs = kmem_cache_alloc(fs_cachep, GFP_KERNEL);
- /* We don't need to lock fs - think why ;-) */
- if (fs) {
- atomic_set(&fs->count, 1);
- rwlock_init(&fs->lock);
- fs->umask = old->umask;
- read_lock(&old->lock);
- fs->root = old->root;
- path_get(&old->root);
- fs->pwd = old->pwd;
- path_get(&old->pwd);
- read_unlock(&old->lock);
- }
- return fs;
-}
-
-struct fs_struct *copy_fs_struct(struct fs_struct *old)
-{
- return __copy_fs_struct(old);
-}
-
-EXPORT_SYMBOL_GPL(copy_fs_struct);
-
static int copy_fs(unsigned long clone_flags, struct task_struct *tsk)
{
if (clone_flags & CLONE_FS) {
atomic_inc(&current->fs->count);
return 0;
}
- tsk->fs = __copy_fs_struct(current->fs);
+ tsk->fs = copy_fs_struct(current->fs);
if (!tsk->fs)
return -ENOMEM;
return 0;
@@ -1545,7 +1520,7 @@ static int unshare_fs(unsigned long unshare_flags, struct fs_struct **new_fsp)
if ((unshare_flags & CLONE_FS) &&
(fs && atomic_read(&fs->count) > 1)) {
- *new_fsp = __copy_fs_struct(current->fs);
+ *new_fsp = copy_fs_struct(current->fs);
if (!*new_fsp)
return -ENOMEM;
}