From 0b52075ee62301dd150c9f2c3ddd0035ed894cde Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 23 Dec 2018 16:02:47 -0500 Subject: introduce cloning of fs_context new primitive: vfs_dup_fs_context(). Comes with fs_context method (->dup()) for copying the filesystem-specific parts of fs_context, along with LSM one (->fs_context_dup()) for doing the same to LSM parts. [needs better commit message, and change of Author:, anyway] Signed-off-by: Al Viro --- include/linux/lsm_hooks.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux/lsm_hooks.h') diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 47ba4db4d8fb..356e78fe90a8 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -79,6 +79,11 @@ * Security hooks for mount using fs_context. * [See also Documentation/filesystems/mounting.txt] * + * @fs_context_dup: + * Allocate and attach a security structure to sc->security. This pointer + * is initialised to NULL by the caller. + * @fc indicates the new filesystem context. + * @src_fc indicates the original filesystem context. * @fs_context_parse_param: * Userspace provided a parameter to configure a superblock. The LSM may * reject it with an error and may use it for itself, in which case it @@ -1470,6 +1475,7 @@ union security_list_options { void (*bprm_committing_creds)(struct linux_binprm *bprm); void (*bprm_committed_creds)(struct linux_binprm *bprm); + int (*fs_context_dup)(struct fs_context *fc, struct fs_context *src_sc); int (*fs_context_parse_param)(struct fs_context *fc, struct fs_parameter *param); int (*sb_alloc_security)(struct super_block *sb); @@ -1813,6 +1819,7 @@ struct security_hook_heads { struct hlist_head bprm_check_security; struct hlist_head bprm_committing_creds; struct hlist_head bprm_committed_creds; + struct hlist_head fs_context_dup; struct hlist_head fs_context_parse_param; struct hlist_head sb_alloc_security; struct hlist_head sb_free_security; -- cgit v1.2.3