diff options
| author |   David Howells <dhowells@redhat.com> | 2018-11-05 17:40:30 +0000 |
|---|---|---|
| committer |   Al Viro <viro@zeniv.linux.org.uk> | 2019-03-20 18:49:06 -0400 |
| commit | 2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae (patch) | |
| tree | b7c4c1f2497b6c04b3481fdfd461c652befbca6d /include/linux/lsm_hooks.h | |
| parent | vfs: syscall: Add open_tree(2) to reference or clone a mount (diff) | |
| download | linux-dev-2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae.tar.xz linux-dev-2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae.zip | |
vfs: syscall: Add move_mount(2) to move mounts around
Add a move_mount() system call that will move a mount from one place to
another and, in the next commit, allow to attach an unattached mount tree.
The new system call looks like the following:
int move_mount(int from_dfd, const char *from_path,
int to_dfd, const char *to_path,
unsigned int flags);
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-api@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/lsm_hooks.h')
| -rw-r--r-- | include/linux/lsm_hooks.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index a9b8ff578b6b..cb33f81cf5a1 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -160,6 +160,10 @@ * Parse a string of security data filling in the opts structure * @options string containing all mount options known by the LSM * @opts binary data structure usable by the LSM + * @move_mount: + * Check permission before a mount is moved. + * @from_path indicates the mount that is going to be moved. + * @to_path indicates the mountpoint that will be mounted upon. * @dentry_init_security: * Compute a context for a dentry as the inode is not yet available * since NFSv4 has no label backed by an EA anyway. @@ -1501,6 +1505,7 @@ union security_list_options { unsigned long *set_kern_flags); int (*sb_add_mnt_opt)(const char *option, const char *val, int len, void **mnt_opts); + int (*move_mount)(const struct path *from_path, const struct path *to_path); int (*dentry_init_security)(struct dentry *dentry, int mode, const struct qstr *name, void **ctx, u32 *ctxlen); @@ -1835,6 +1840,7 @@ struct security_hook_heads { struct hlist_head sb_set_mnt_opts; struct hlist_head sb_clone_mnt_opts; struct hlist_head sb_add_mnt_opt; + struct hlist_head move_mount; struct hlist_head dentry_init_security; struct hlist_head dentry_create_files_as; #ifdef CONFIG_SECURITY_PATH |