From: John@suse.de, Johansen@suse.de
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, Tony Jones <tonyj@suse.de>,
Andreas Gruenbacher <agruen@suse.de>,
John Johansen <jjohansen@suse.de>
Subject: [AppArmor 17/47] Add a struct vfsmount parameter to vfs_unlink()
Date: Thu, 20 Dec 2007 06:09:27 -0800 [thread overview]
Message-ID: <20071220140944.069627598@suse.de> (raw)
In-Reply-To: 20071220140910.934607826@suse.de
[-- Attachment #1: vfs-unlink.diff --]
[-- Type: text/plain, Size: 13519 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 | 3 ++-
fs/namei.c | 5 +++--
fs/nfsd/nfs4recover.c | 2 +-
fs/nfsd/vfs.c | 2 +-
fs/unionfs/commonfops.c | 4 +++-
fs/unionfs/copyup.c | 3 ++-
fs/unionfs/dirhelper.c | 5 ++++-
fs/unionfs/inode.c | 22 ++++++++++++++++------
fs/unionfs/rename.c | 8 ++++++--
fs/unionfs/sioq.c | 2 +-
fs/unionfs/sioq.h | 1 +
fs/unionfs/unlink.c | 5 ++++-
include/linux/fs.h | 2 +-
ipc/mqueue.c | 2 +-
14 files changed, 46 insertions(+), 20 deletions(-)
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -443,10 +443,11 @@ static int ecryptfs_unlink(struct inode
{
int rc = 0;
struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry);
+ struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
struct inode *lower_dir_inode = ecryptfs_inode_to_lower(dir);
lock_parent(lower_dentry);
- rc = vfs_unlink(lower_dir_inode, lower_dentry);
+ rc = vfs_unlink(lower_dir_inode, lower_dentry, lower_mnt);
if (rc) {
printk(KERN_ERR "Error in vfs_unlink; rc = [%d]\n", rc);
goto out_unlock;
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2288,7 +2288,7 @@ asmlinkage long sys_rmdir(const char __u
return do_rmdir(AT_FDCWD, pathname);
}
-int vfs_unlink(struct inode *dir, struct dentry *dentry)
+int vfs_unlink(struct inode *dir, struct dentry *dentry, struct vfsmount *mnt)
{
int error = may_delete(dir, dentry, 0);
@@ -2356,7 +2356,8 @@ static long do_unlinkat(int dfd, const c
error = mnt_want_write(nd.path.mnt);
if (error)
goto exit2;
- error = vfs_unlink(nd.path.dentry->d_inode, dentry);
+ error = vfs_unlink(nd.path.dentry->d_inode, dentry,
+ nd.path.mnt);
mnt_drop_write(nd.path.mnt);
exit2:
dput(dentry);
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -264,7 +264,7 @@ nfsd4_remove_clid_file(struct dentry *di
return -EINVAL;
}
mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
- status = vfs_unlink(dir->d_inode, dentry);
+ status = vfs_unlink(dir->d_inode, dentry, rec_dir.path.mnt);
mutex_unlock(&dir->d_inode->i_mutex);
return status;
}
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1772,7 +1772,7 @@ nfsd_unlink(struct svc_rqst *rqstp, stru
host_err = -EPERM;
} else
#endif
- host_err = vfs_unlink(dirp, rdentry);
+ host_err = vfs_unlink(dirp, rdentry, exp->ex_path.mnt);
} else { /* It's RMDIR */
host_err = vfs_rmdir(dirp, rdentry, exp->ex_path.mnt);
}
--- a/fs/unionfs/commonfops.c
+++ b/fs/unionfs/commonfops.c
@@ -34,6 +34,7 @@ static int copyup_deleted_file(struct fi
int err;
struct dentry *tmp_dentry = NULL;
struct dentry *lower_dentry;
+ struct vfsmount *lower_mnt;
struct dentry *lower_dir_dentry = NULL;
lower_dentry = unionfs_lower_dentry_idx(dentry, bstart);
@@ -82,13 +83,14 @@ retry:
/* bring it to the same state as an unlinked file */
lower_dentry = unionfs_lower_dentry_idx(dentry, dbstart(dentry));
+ lower_mnt = unionfs_lower_mnt_idx(dentry, dbstart(dentry));
if (!unionfs_lower_inode_idx(dentry->d_inode, bindex)) {
atomic_inc(&lower_dentry->d_inode->i_count);
unionfs_set_lower_inode_idx(dentry->d_inode, bindex,
lower_dentry->d_inode);
}
lower_dir_dentry = lock_parent(lower_dentry);
- err = vfs_unlink(lower_dir_dentry->d_inode, lower_dentry);
+ err = vfs_unlink(lower_dir_dentry->d_inode, lower_dentry, lower_mnt);
unlock_dir(lower_dir_dentry);
out:
--- a/fs/unionfs/copyup.c
+++ b/fs/unionfs/copyup.c
@@ -491,7 +491,8 @@ out_unlink:
* quota, or something else happened so let's unlink; we don't
* really care about the return value of vfs_unlink
*/
- vfs_unlink(new_lower_parent_dentry->d_inode, new_lower_dentry);
+ vfs_unlink(new_lower_parent_dentry->d_inode, new_lower_dentry,
+ new_lower_mnt);
if (copyup_file) {
/* need to close the file */
--- a/fs/unionfs/dirhelper.c
+++ b/fs/unionfs/dirhelper.c
@@ -29,6 +29,7 @@ int do_delete_whiteouts(struct dentry *d
int err = 0;
struct dentry *lower_dir_dentry = NULL;
struct dentry *lower_dentry;
+ struct vfsmount *lower_mnt;
char *name = NULL, *p;
struct inode *lower_dir;
int i;
@@ -37,6 +38,7 @@ int do_delete_whiteouts(struct dentry *d
/* Find out lower parent dentry */
lower_dir_dentry = unionfs_lower_dentry_idx(dentry, bindex);
+ lower_mnt = unionfs_lower_mnt_idx(dentry, bindex);
BUG_ON(!S_ISDIR(lower_dir_dentry->d_inode->i_mode));
lower_dir = lower_dir_dentry->d_inode;
BUG_ON(!S_ISDIR(lower_dir->i_mode));
@@ -70,7 +72,8 @@ int do_delete_whiteouts(struct dentry *d
break;
}
if (lower_dentry->d_inode)
- err = vfs_unlink(lower_dir, lower_dentry);
+ err = vfs_unlink(lower_dir, lower_dentry,
+ lower_mnt);
dput(lower_dentry);
if (err)
break;
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -25,6 +25,7 @@ static int unionfs_create(struct inode *
struct dentry *lower_dentry = NULL;
struct vfsmount *lower_mnt = NULL;
struct dentry *wh_dentry = NULL;
+ struct vfsmount *wh_mnt = NULL;
struct dentry *lower_parent_dentry = NULL;
char *name = NULL;
int valid = 0;
@@ -75,6 +76,7 @@ static int unionfs_create(struct inode *
wh_dentry = lookup_one_len(name, lower_dentry->d_parent,
dentry->d_name.len + UNIONFS_WHLEN);
+ wh_mnt = unionfs_lower_mnt(dentry);
if (IS_ERR(wh_dentry)) {
err = PTR_ERR(wh_dentry);
wh_dentry = NULL;
@@ -88,7 +90,8 @@ static int unionfs_create(struct inode *
struct dentry *lower_dir_dentry;
lower_dir_dentry = lock_parent(wh_dentry);
- err = vfs_unlink(lower_dir_dentry->d_inode, wh_dentry);
+ err = vfs_unlink(lower_dir_dentry->d_inode, wh_dentry,
+ wh_mnt);
unlock_dir(lower_dir_dentry);
/*
@@ -227,6 +230,7 @@ static int unionfs_link(struct dentry *o
struct vfsmount *lower_new_mnt = NULL;
struct dentry *lower_dir_dentry = NULL;
struct dentry *whiteout_dentry;
+ struct vfsmount *whiteout_mnt;
char *name = NULL;
unionfs_read_lock(old_dentry->d_sb);
@@ -257,6 +261,7 @@ static int unionfs_link(struct dentry *o
whiteout_dentry = lookup_one_len(name, lower_new_dentry->d_parent,
new_dentry->d_name.len +
UNIONFS_WHLEN);
+ whiteout_mnt = unionfs_lower_mnt(new_dentry);
if (IS_ERR(whiteout_dentry)) {
err = PTR_ERR(whiteout_dentry);
goto out;
@@ -271,7 +276,7 @@ static int unionfs_link(struct dentry *o
err = is_robranch_super(new_dentry->d_sb, dbstart(new_dentry));
if (!err)
err = vfs_unlink(lower_dir_dentry->d_inode,
- whiteout_dentry);
+ whiteout_dentry, whiteout_mnt);
fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
dir->i_nlink = unionfs_get_nlinks(dir);
@@ -383,6 +388,7 @@ static int unionfs_symlink(struct inode
struct dentry *lower_dentry = NULL;
struct vfsmount *lower_mnt = NULL;
struct dentry *whiteout_dentry = NULL;
+ struct vfsmount *whiteout_mnt = NULL;
struct dentry *lower_dir_dentry = NULL;
umode_t mode;
int bindex = 0, bstart;
@@ -428,12 +434,13 @@ static int unionfs_symlink(struct inode
* found a .wh.foo entry, unlink it and then call
* vfs_symlink().
*/
+ whiteout_mnt = unionfs_lower_mnt(dentry);
lower_dir_dentry = lock_parent(whiteout_dentry);
err = is_robranch_super(dentry->d_sb, bstart);
if (!err)
err = vfs_unlink(lower_dir_dentry->d_inode,
- whiteout_dentry);
+ whiteout_dentry, whiteout_mnt);
dput(whiteout_dentry);
fsstack_copy_attr_times(dir, lower_dir_dentry->d_inode);
@@ -547,7 +554,7 @@ static int unionfs_mkdir(struct inode *p
{
int err = 0;
struct dentry *lower_dentry = NULL, *whiteout_dentry = NULL;
- struct vfsmount *lower_mnt = NULL;
+ struct vfsmount *lower_mnt = NULL, *whiteout_mnt = NULL;
struct dentry *lower_parent_dentry = NULL;
int bindex = 0, bstart;
char *name = NULL;
@@ -588,6 +595,7 @@ static int unionfs_mkdir(struct inode *p
dput(whiteout_dentry);
whiteout_dentry = NULL;
} else {
+ whiteout_mnt = unionfs_lower_mnt(dentry);
lower_parent_dentry = lock_parent(whiteout_dentry);
/* found a.wh.foo entry, remove it then do vfs_mkdir */
@@ -595,6 +603,7 @@ static int unionfs_mkdir(struct inode *p
if (!err) {
args.unlink.parent = lower_parent_dentry->d_inode;
args.unlink.dentry = whiteout_dentry;
+ args.unlink.mnt = whiteout_mnt;
run_sioq(__unionfs_unlink, &args);
err = args.err;
}
@@ -704,7 +713,7 @@ static int unionfs_mknod(struct inode *d
{
int err = 0;
struct dentry *lower_dentry = NULL, *whiteout_dentry = NULL;
- struct vfsmount *lower_mnt = NULL;
+ struct vfsmount *lower_mnt = NULL, *whiteout_mnt = NULL;
struct dentry *lower_parent_dentry = NULL;
int bindex = 0, bstart;
char *name = NULL;
@@ -745,13 +754,14 @@ static int unionfs_mknod(struct inode *d
whiteout_dentry = NULL;
} else {
/* found .wh.foo, unlink it */
+ whiteout_mnt = unionfs_lower_mnt(dentry);
lower_parent_dentry = lock_parent(whiteout_dentry);
/* found a.wh.foo entry, remove it then do vfs_mkdir */
err = is_robranch_super(dentry->d_sb, bstart);
if (!err)
err = vfs_unlink(lower_parent_dentry->d_inode,
- whiteout_dentry);
+ whiteout_dentry, whiteout_mnt);
dput(whiteout_dentry);
unlock_dir(lower_parent_dentry);
--- a/fs/unionfs/rename.c
+++ b/fs/unionfs/rename.c
@@ -29,6 +29,7 @@ static int __unionfs_rename(struct inode
struct dentry *lower_old_dir_dentry;
struct dentry *lower_new_dir_dentry;
struct dentry *lower_wh_dentry;
+ struct vfsmount *lower_wh_mnt;
struct dentry *lower_wh_dir_dentry;
char *wh_name = NULL;
@@ -61,6 +62,7 @@ static int __unionfs_rename(struct inode
lower_wh_dentry = lookup_one_len(wh_name, lower_new_dentry->d_parent,
new_dentry->d_name.len +
UNIONFS_WHLEN);
+ lower_wh_mnt = lower_new_mnt;
if (IS_ERR(lower_wh_dentry)) {
err = PTR_ERR(lower_wh_dentry);
goto out;
@@ -81,7 +83,7 @@ static int __unionfs_rename(struct inode
err = is_robranch_super(old_dentry->d_sb, bindex);
if (!err)
err = vfs_unlink(lower_wh_dir_dentry->d_inode,
- lower_wh_dentry);
+ lower_wh_dentry, lower_wh_mnt);
dput(lower_wh_dentry);
unlock_dir(lower_wh_dir_dentry);
@@ -194,16 +196,18 @@ static int do_unionfs_rename(struct inod
for (bindex = old_bstart - 1; bindex >= new_bstart; bindex--) {
struct dentry *unlink_dentry;
struct dentry *unlink_dir_dentry;
+ struct vfsmount *unlink_mnt;
unlink_dentry = unionfs_lower_dentry_idx(new_dentry, bindex);
if (!unlink_dentry)
continue;
+ unlink_mnt = unionfs_lower_mnt_idx(new_dentry, bindex);
unlink_dir_dentry = lock_parent(unlink_dentry);
err = is_robranch_super(old_dir->i_sb, bindex);
if (!err)
err = vfs_unlink(unlink_dir_dentry->d_inode,
- unlink_dentry);
+ unlink_dentry, unlink_mnt);
fsstack_copy_attr_times(new_dentry->d_parent->d_inode,
unlink_dir_dentry->d_inode);
--- a/fs/unionfs/sioq.c
+++ b/fs/unionfs/sioq.c
@@ -97,7 +97,7 @@ void __unionfs_unlink(struct work_struct
struct sioq_args *args = container_of(work, struct sioq_args, work);
struct unlink_args *u = &args->unlink;
- args->err = vfs_unlink(u->parent, u->dentry);
+ args->err = vfs_unlink(u->parent, u->dentry, u->mnt);
complete(&args->comp);
}
--- a/fs/unionfs/sioq.h
+++ b/fs/unionfs/sioq.h
@@ -58,6 +58,7 @@ struct symlink_args {
struct unlink_args {
struct inode *parent;
struct dentry *dentry;
+ struct vfsmount *mnt;
};
--- a/fs/unionfs/unlink.c
+++ b/fs/unionfs/unlink.c
@@ -22,6 +22,7 @@
static int unionfs_unlink_whiteout(struct inode *dir, struct dentry *dentry)
{
struct dentry *lower_dentry;
+ struct vfsmount *lower_mnt;
struct dentry *lower_dir_dentry;
int bindex;
int err = 0;
@@ -36,13 +37,15 @@ static int unionfs_unlink_whiteout(struc
if (!lower_dentry)
goto out;
+ lower_mnt = unionfs_lower_mnt_idx(dentry, bindex);
lower_dir_dentry = lock_parent(lower_dentry);
/* avoid destroying the lower inode if the file is in use */
dget(lower_dentry);
err = is_robranch_super(dentry->d_sb, bindex);
if (!err)
- err = vfs_unlink(lower_dir_dentry->d_inode, lower_dentry);
+ err = vfs_unlink(lower_dir_dentry->d_inode, lower_dentry,
+ lower_mnt);
/* if vfs_unlink succeeded, update our inode's times */
if (!err)
unionfs_copy_attr_times(dentry->d_inode);
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1075,7 +1075,7 @@ extern int vfs_mknod(struct inode *, str
extern int vfs_symlink(struct inode *, struct dentry *, struct vfsmount *, const char *, int);
extern int vfs_link(struct dentry *, struct vfsmount *, struct inode *, struct dentry *, struct vfsmount *);
extern int vfs_rmdir(struct inode *, struct dentry *, struct vfsmount *);
-extern int vfs_unlink(struct inode *, struct dentry *);
+extern int vfs_unlink(struct inode *, struct dentry *, struct vfsmount *);
extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
/*
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -749,7 +749,7 @@ asmlinkage long sys_mq_unlink(const char
err = mnt_want_write(mqueue_mnt);
if (err)
goto out_err;
- err = vfs_unlink(dentry->d_parent->d_inode, dentry);
+ err = vfs_unlink(dentry->d_parent->d_inode, dentry, mqueue_mnt);
mnt_drop_write(mqueue_mnt);
out_err:
dput(dentry);
--
next prev parent reply other threads:[~2007-12-20 14:19 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-20 14:09 [AppArmor 00/47] AppArmor security module overview John, Johansen
2007-12-20 14:09 ` [AppArmor 01/47] Pass struct vfsmount to the inode_create LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 02/47] Pass struct path down to remove_suid and children John, Johansen
2007-12-20 14:09 ` [AppArmor 03/47] Add a vfsmount parameter to notify_change() John, Johansen
2007-12-20 14:09 ` [AppArmor 04/47] Pass struct vfsmount to the inode_setattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 05/47] Add struct vfsmount parameter to vfs_mkdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 06/47] Pass struct vfsmount to the inode_mkdir LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 07/47] Add a struct vfsmount parameter to vfs_mknod() John, Johansen
2007-12-20 14:09 ` [AppArmor 08/47] Pass struct vfsmount to the inode_mknod LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 09/47] Add a struct vfsmount parameter to vfs_symlink() John, Johansen
2007-12-20 14:09 ` [AppArmor 10/47] Pass struct vfsmount to the inode_symlink LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 11/47] Pass struct vfsmount to the inode_readlink " John, Johansen
2007-12-20 14:09 ` [AppArmor 12/47] Add struct vfsmount parameters to vfs_link() John, Johansen
2007-12-20 14:09 ` [AppArmor 13/47] Pass the struct vfsmounts to the inode_link LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 14/47] Add a struct vfsmount parameter to vfs_rmdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 15/47] Pass struct vfsmount to the inode_rmdir LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 16/47] Call lsm hook before unhashing dentry in vfs_rmdir() John, Johansen
2007-12-20 14:09 ` John, Johansen [this message]
2007-12-20 14:09 ` [AppArmor 18/47] Pass struct vfsmount to the inode_unlink LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 19/47] Add struct vfsmount parameters to vfs_rename() John, Johansen
2007-12-20 14:09 ` [AppArmor 20/47] Pass struct vfsmount to the inode_rename LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 21/47] Add a struct vfsmount parameter to vfs_setxattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 22/47] Pass struct vfsmount to the inode_setxattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 23/47] Add a struct vfsmount parameter to vfs_getxattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 24/47] Pass struct vfsmount to the inode_getxattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 25/47] Add a struct vfsmount parameter to vfs_listxattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 26/47] Pass struct vfsmount to the inode_listxattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 27/47] Add a struct vfsmount parameter to vfs_removexattr() John, Johansen
2007-12-20 14:09 ` [AppArmor 28/47] Pass struct vfsmount to the inode_removexattr LSM hook John, Johansen
2007-12-20 14:09 ` [AppArmor 29/47] Fix __d_path() for lazy unmounts and make it unambiguous John, Johansen
2007-12-20 14:09 ` [AppArmor 30/47] Make d_path() consistent across mount operations John, Johansen
2007-12-20 14:09 ` [AppArmor 31/47] Add d_namespace_path() to compute namespace relative pathnames John, Johansen
2007-12-20 14:09 ` [AppArmor 32/47] From: Miklos Szeredi <mszeredi@suse.cz> John, Johansen
2007-12-20 14:09 ` [AppArmor 33/47] VFS: new fsetattr() file operation John, Johansen
2007-12-20 14:09 ` [AppArmor 34/47] Pass struct file down the inode_*xattr security LSM hooks John, Johansen
2007-12-20 14:09 ` [AppArmor 35/47] Factor out sysctl pathname code John, Johansen
2007-12-20 14:09 ` [AppArmor 36/47] Allow permission functions to tell between parent and leaf checks John, Johansen
2007-12-20 14:09 ` [AppArmor 37/47] Switch to vfs_permission() in do_path_lookup() John, Johansen
2007-12-20 14:09 ` [AppArmor 38/47] Switch to vfs_permission() in sys_fchdir() John, Johansen
2007-12-20 14:09 ` [AppArmor 39/47] Fix file_permission() John, Johansen
2007-12-20 14:09 ` [AppArmor 40/47] Export audit subsystem for use by modules John, Johansen
2007-12-20 14:09 ` [AppArmor 41/47] AppArmor: Main Part John, Johansen
2007-12-20 14:09 ` [AppArmor 42/47] AppArmor: Module and LSM hooks John, Johansen
2007-12-20 14:09 ` [AppArmor 43/47] AppArmor: Profile loading and manipulation, pathname matching John, Johansen
2007-12-20 14:09 ` [AppArmor 44/47] AppArmor: all the rest John, Johansen
2007-12-20 14:09 ` [AppArmor 45/47] Add AppArmor LSM to security/Makefile John, Johansen
2007-12-20 14:09 ` [AppArmor 46/47] add simple network toggles to apparmor John, Johansen
2007-12-20 14:09 ` [AppArmor 47/47] --- Documentation/lsm/AppArmor-Security-Goal.txt | 134 +++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) John, Johansen
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