[AppArmor 14/41] Add struct vfsmount parameters to vfs_link()

jjohansen
2007-04-12T09:45:24Z

[-- Attachment #1: vfs-link.diff --]
[-- Type: text/plain, Size: 3494 bytes --]

The vfsmount will be passed down to the LSM hook so that LSMs can compute
pathnames.

Signed-off-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: John Johansen <jjohansen@suse.de>

---
fs/ecryptfs/inode.c | 9 +++++++--
fs/namei.c | 5 +++--
fs/nfsd/vfs.c | 3 ++-
include/linux/fs.h | 2 +-
4 files changed, 13 insertions(+), 6 deletions(-)

--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -411,19 +411,24 @@ static int ecryptfs_link(struct dentry *
struct dentry *new_dentry)
{
struct dentry *lower_old_dentry;
+ struct vfsmount *lower_old_mnt;
struct dentry *lower_new_dentry;
+ struct vfsmount *lower_new_mnt;
struct dentry *lower_dir_dentry;
u64 file_size_save;
int rc;

file_size_save = i_size_read(old_dentry->d_inode);
lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
+ lower_old_mnt = ecryptfs_dentry_to_lower_mnt(old_dentry);
lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
+ lower_new_mnt = ecryptfs_dentry_to_lower_mnt(new_dentry);
dget(lower_old_dentry);
dget(lower_new_dentry);
lower_dir_dentry = lock_parent(lower_new_dentry);
- rc = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
- lower_new_dentry);
+ rc = vfs_link(lower_old_dentry, lower_old_mnt,
+ lower_dir_dentry->d_inode, lower_new_dentry,
+ lower_new_mnt);
if (rc || !lower_new_dentry->d_inode)
goto out_lock;
rc = ecryptfs_interpose(lower_new_dentry, new_dentry, dir->i_sb, 0);
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2250,7 +2250,7 @@ asmlinkage long sys_symlink(const char _
return sys_symlinkat(oldname, AT_FDCWD, newname);
}

-int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
+int vfs_link(struct dentry *old_dentry, struct vfsmount *old_mnt, struct inode *dir, struct dentry *new_dentry, struct vfsmount *new_mnt)
{
struct inode *inode = old_dentry->d_inode;
int error;
@@ -2328,7 +2328,8 @@ asmlinkage long sys_linkat(int olddfd, c
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry))
goto out_unlock;
- error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
+ error = vfs_link(old_nd.dentry, old_nd.mnt, nd.dentry->d_inode,
+ new_dentry, nd.mnt);
dput(new_dentry);
out_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1534,7 +1534,8 @@ nfsd_link(struct svc_rqst *rqstp, struct
dold = tfhp->fh_dentry;
dest = dold->d_inode;

- host_err = vfs_link(dold, dirp, dnew);
+ host_err = vfs_link(dold, tfhp->fh_export->ex_mnt, dirp,
+ dnew, ffhp->fh_export->ex_mnt);
if (!host_err) {
if (EX_ISSYNC(ffhp->fh_export)) {
err = nfserrno(nfsd_sync_dir(ddir));
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -983,7 +983,7 @@ extern int vfs_create(struct inode *, st
extern int vfs_mkdir(struct inode *, struct dentry *, struct vfsmount *, int);
extern int vfs_mknod(struct inode *, struct dentry *, struct vfsmount *, int, dev_t);
extern int vfs_symlink(struct inode *, struct dentry *, struct vfsmount *, const char *, int);
-extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
+extern int vfs_link(struct dentry *, struct vfsmount *, struct inode *, struct dentry *, struct vfsmount *);
extern int vfs_rmdir(struct inode *, struct dentry *);
extern int vfs_unlink(struct inode *, struct dentry *);
extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);

--