This is preparation for CephFS security label. CephFS's implementation uses
dentry_init_security() to get security context before inode is created,
then sends open/mkdir/mknod request to MDS, together with security xattr
"security.<security module name>"
Signed-off-by: "Yan, Zheng" <zyan@xxxxxxxxxx>
---
fs/nfs/nfs4proc.c | 3 ++-
include/linux/lsm_hooks.h | 4 ++--
include/linux/security.h | 9 +++++----
security/security.c | 7 ++++---
security/selinux/hooks.c | 8 ++++++--
5 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6dd146885da9..d18a5fb7aec3 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -122,7 +122,8 @@ nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
return NULL;
err = security_dentry_init_security(dentry, sattr->ia_mode,
- &dentry->d_name, (void **)&label->label, &label->len);
+ &dentry->d_name, NULL,
+ (void **)&label->label, &label->len);
if (err == 0)
return label;
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 8f1131c8dd54..e176c2032bdc 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1476,8 +1476,8 @@ union security_list_options {
unsigned long *set_kern_flags);
int (*sb_parse_opts_str)(char *options, struct security_mnt_opts *opts);
int (*dentry_init_security)(struct dentry *dentry, int mode,
- const struct qstr *name, void **ctx,
- u32 *ctxlen);
+ const struct qstr *name, const char **label,
+ void **ctx, u32 *ctxlen);
int (*dentry_create_files_as)(struct dentry *dentry, int mode,
struct qstr *name,
const struct cred *old,
diff --git a/include/linux/security.h b/include/linux/security.h
index 63030c85ee19..df2d73998c64 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -246,8 +246,9 @@ int security_sb_clone_mnt_opts(const struct super_block *oldsb,
unsigned long *set_kern_flags);
int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts);
int security_dentry_init_security(struct dentry *dentry, int mode,
- const struct qstr *name, void **ctx,
- u32 *ctxlen);
+ const struct qstr *name,
+ const char **label,
+ void **ctx, u32 *ctxlen);
int security_dentry_create_files_as(struct dentry *dentry, int mode,
struct qstr *name,
const struct cred *old,
@@ -609,8 +610,8 @@ static inline void security_inode_free(struct inode *inode)
static inline int security_dentry_init_security(struct dentry *dentry,
int mode,
const struct qstr *name,
- void **ctx,
- u32 *ctxlen)
+ const char **label,
+ void **ctx, u32 *ctxlen)
{
return -EOPNOTSUPP;
}
diff --git a/security/security.c b/security/security.c
index 68f46d849abe..69818d46aa28 100644
--- a/security/security.c
+++ b/security/security.c
@@ -450,11 +450,12 @@ void security_inode_free(struct inode *inode)
}
int security_dentry_init_security(struct dentry *dentry, int mode,
- const struct qstr *name, void **ctx,
- u32 *ctxlen)
+ const struct qstr *name,
+ const char **label,
+ void **ctx, u32 *ctxlen)
{
return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
- name, ctx, ctxlen);
+ name, label, ctx, ctxlen);
}
EXPORT_SYMBOL(security_dentry_init_security);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 2b5ee5fbd652..eca3879d9357 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2985,8 +2985,9 @@ static void selinux_inode_free_security(struct inode *inode)
}
static int selinux_dentry_init_security(struct dentry *dentry, int mode,
- const struct qstr *name, void **ctx,
- u32 *ctxlen)
+ const struct qstr *name,
+ const char **label,
+ void **ctx, u32 *ctxlen)
{
u32 newsid;
int rc;
@@ -2998,6 +2999,9 @@ static int selinux_dentry_init_security(struct dentry *dentry, int mode,
if (rc)
return rc;
+ if (label)
+ *label = XATTR_SELINUX_SUFFIX;
+
return security_sid_to_context(&selinux_state, newsid, (char **)ctx,
ctxlen);
}
--
2.17.1
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
