lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

vfs: add helpers to get root and pwd

Browse Source 
Add three helpers that retrieve a refcounted copy of the root and cwd
from the supplied fs_struct.

 get_fs_root()
 get_fs_pwd()
 get_fs_root_and_pwd()

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi
2010-08-10 11:41:36 +02:00
committed by Al Viro
parent 542ce7a9bc
commit f7ad3c6be9
8 changed files with 49 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
fs/dcache.c
View File

@@ -2014,10 +2014,7 @@ char *d_path(const struct path *path, char *buf, int buflen)
if (path->dentry->d_op && path->dentry->d_op->d_dname)
return path->dentry->d_op->d_dname(path->dentry, buf, buflen);
read_lock(&current->fs->lock);
root = current->fs->root;
path_get(&root);
read_unlock(&current->fs->lock);
get_fs_root(current->fs, &root);
spin_lock(&dcache_lock);
tmp = root;
res = __d_path(path, &tmp, buf, buflen);
@@ -2129,12 +2126,7 @@ SYSCALL_DEFINE2(getcwd, char __user *, buf, unsigned long, size)
if (!page)
return -ENOMEM;
read_lock(&current->fs->lock);
pwd = current->fs->pwd;
path_get(&pwd);
root = current->fs->root;
path_get(&root);
read_unlock(&current->fs->lock);
get_fs_root_and_pwd(current->fs, &root, &pwd);
error = -ENOENT;
spin_lock(&dcache_lock);