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| author | Vivek Goyal <vgoyal@redhat.com> | 2016-07-13 10:44:49 -0400 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2016-08-08 20:42:13 -0400 |
| commit | 121ab822ef21914adac2fa3730efeeb8fd762473 (patch) | |
| tree | 7fd5f6947837b361c249ec976af17bee10b22a2e /security | |
| parent | 56909eb3f559103196ecbf2c08c923e0804980fb (diff) | |
| download | linux-121ab822ef21914adac2fa3730efeeb8fd762473.tar.gz linux-121ab822ef21914adac2fa3730efeeb8fd762473.tar.bz2 linux-121ab822ef21914adac2fa3730efeeb8fd762473.zip | |
security,overlayfs: Provide security hook for copy up of xattrs for overlay file
Provide a security hook which is called when xattrs of a file are being
copied up. This hook is called once for each xattr and LSM can return
0 if the security module wants the xattr to be copied up, 1 if the
security module wants the xattr to be discarded on the copy, -EOPNOTSUPP
if the security module does not handle/manage the xattr, or a -errno
upon an error.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
[PM: whitespace cleanup for checkpatch.pl]
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/security.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/security/security.c b/security/security.c index f2a7f27bd3e9..a9e2bb9fb9d3 100644 --- a/security/security.c +++ b/security/security.c @@ -754,6 +754,12 @@ int security_inode_copy_up(struct dentry *src, struct cred **new) } EXPORT_SYMBOL(security_inode_copy_up); +int security_inode_copy_up_xattr(const char *name) +{ + return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); +} +EXPORT_SYMBOL(security_inode_copy_up_xattr); + int security_file_permission(struct file *file, int mask) { int ret; @@ -1692,6 +1698,8 @@ struct security_hook_heads security_hook_heads = { LIST_HEAD_INIT(security_hook_heads.inode_getsecid), .inode_copy_up = LIST_HEAD_INIT(security_hook_heads.inode_copy_up), + .inode_copy_up_xattr = + LIST_HEAD_INIT(security_hook_heads.inode_copy_up_xattr), .file_permission = LIST_HEAD_INIT(security_hook_heads.file_permission), .file_alloc_security = |