The vfsmount will be passed down to the LSM hook so that LSMs can compute
pathnames.
Signed-off-by: Tony Jones <[email protected]>
Signed-off-by: Andreas Gruenbacher <[email protected]>
Signed-off-by: John Johansen <[email protected]>
---
fs/ecryptfs/inode.c | 9 +++++++--
fs/namei.c | 5 +++--
fs/nfsd/vfs.c | 3 ++-
fs/unionfs/inode.c | 14 +++++++++++---
include/linux/fs.h | 2 +-
5 files changed, 24 insertions(+), 9 deletions(-)
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -401,19 +401,24 @@ 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
@@ -2461,7 +2461,7 @@ 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;
@@ -2542,7 +2542,8 @@ asmlinkage long sys_linkat(int olddfd, c
error = mnt_want_write(nd.path.mnt);
if (error)
goto out_dput;
- error = vfs_link(old_nd.path.dentry, nd.path.dentry->d_inode, new_dentry);
+ error = vfs_link(old_nd.path.dentry, old_nd.path.mnt,
+ nd.path.dentry->d_inode, new_dentry, nd.path.mnt);
mnt_drop_write(nd.path.mnt);
out_dput:
dput(new_dentry);
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1596,7 +1596,8 @@ 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_path.mnt, dirp,
+ dnew, ffhp->fh_export->ex_path.mnt);
if (!host_err) {
if (EX_ISSYNC(ffhp->fh_export)) {
err = nfserrno(nfsd_sync_dir(ddir));
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -222,6 +222,7 @@ static int unionfs_link(struct dentry *o
{
int err = 0;
struct dentry *lower_old_dentry = NULL;
+ struct vfsmount *lower_old_mnt = NULL;
struct dentry *lower_new_dentry = NULL;
struct vfsmount *lower_new_mnt = NULL;
struct dentry *lower_dir_dentry = NULL;
@@ -293,14 +294,17 @@ static int unionfs_link(struct dentry *o
goto out;
}
lower_new_dentry = unionfs_lower_dentry(new_dentry);
+ lower_new_mnt = unionfs_lower_mnt(new_dentry);
lower_old_dentry = unionfs_lower_dentry(old_dentry);
+ lower_old_mnt = unionfs_lower_mnt(old_dentry);
BUG_ON(dbstart(old_dentry) != dbstart(new_dentry));
lower_dir_dentry = lock_parent(lower_new_dentry);
err = is_robranch(old_dentry);
if (!err)
- err = vfs_link(lower_old_dentry, lower_dir_dentry->d_inode,
- lower_new_dentry);
+ err = vfs_link(lower_old_dentry, lower_old_mnt,
+ lower_dir_dentry->d_inode,
+ lower_new_dentry, lower_new_mnt);
unlock_dir(lower_dir_dentry);
docopyup:
@@ -321,12 +325,16 @@ docopyup:
bindex, &lower_new_mnt);
lower_old_dentry =
unionfs_lower_dentry(old_dentry);
+ lower_old_mnt =
+ unionfs_lower_mnt(old_dentry);
lower_dir_dentry =
lock_parent(lower_new_dentry);
/* do vfs_link */
err = vfs_link(lower_old_dentry,
+ lower_old_mnt,
lower_dir_dentry->d_inode,
- lower_new_dentry);
+ lower_new_dentry,
+ lower_new_mnt);
unlock_dir(lower_dir_dentry);
goto check_link;
}
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1073,7 +1073,7 @@ 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 *);
--
--
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