ceph: add acl for cephfs

[~andy/linux] / fs / ceph / xattr.c

diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index be661d8f532adcea4b44d2b42aae52b788d4753e..c7581f3733c1e08a78c8358fd718dd1dc3ac613a 100644 (file)
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -11,11 +11,24 @@
 #define XATTR_CEPH_PREFIX "ceph."
 #define XATTR_CEPH_PREFIX_LEN (sizeof (XATTR_CEPH_PREFIX) - 1)
 
+/*
+ * List of handlers for synthetic system.* attributes. Other
+ * attributes are handled directly.
+ */
+const struct xattr_handler *ceph_xattr_handlers[] = {
+#ifdef CONFIG_CEPH_FS_POSIX_ACL
+       &ceph_xattr_acl_access_handler,
+       &ceph_xattr_acl_default_handler,
+#endif
+       NULL,
+};
+
 static bool ceph_is_valid_xattr(const char *name)
 {
        return !strncmp(name, XATTR_CEPH_PREFIX, XATTR_CEPH_PREFIX_LEN) ||
               !strncmp(name, XATTR_SECURITY_PREFIX,
                        XATTR_SECURITY_PREFIX_LEN) ||
+              !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) ||
               !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) ||
               !strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
 }
@@ -663,10 +676,9 @@ void __ceph_build_xattrs_blob(struct ceph_inode_info *ci)
        }
 }
 
-ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
+ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value,
                      size_t size)
 {
-       struct inode *inode = dentry->d_inode;
        struct ceph_inode_info *ci = ceph_inode(inode);
        int err;
        struct ceph_inode_xattr *xattr;
@@ -675,7 +687,6 @@ ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
        if (!ceph_is_valid_xattr(name))
                return -ENODATA;
 
-
        /* let's see if a virtual xattr was requested */
        vxattr = ceph_match_vxattr(inode, name);
        if (vxattr && !(vxattr->exists_cb && !vxattr->exists_cb(ci))) {
@@ -725,6 +736,15 @@ out:
        return err;
 }
 
+ssize_t ceph_getxattr(struct dentry *dentry, const char *name, void *value,
+                     size_t size)
+{
+       if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+               return generic_getxattr(dentry, name, value, size);
+
+       return __ceph_getxattr(dentry->d_inode, name, value, size);
+}
+
 ssize_t ceph_listxattr(struct dentry *dentry, char *names, size_t size)
 {
        struct inode *inode = dentry->d_inode;
@@ -863,8 +883,8 @@ out:
        return err;
 }
 
-int ceph_setxattr(struct dentry *dentry, const char *name,
-                 const void *value, size_t size, int flags)
+int __ceph_setxattr(struct dentry *dentry, const char *name,
+                       const void *value, size_t size, int flags)
 {
        struct inode *inode = dentry->d_inode;
        struct ceph_vxattr *vxattr;
@@ -879,9 +899,6 @@ int ceph_setxattr(struct dentry *dentry, const char *name,
        struct ceph_inode_xattr *xattr = NULL;
        int required_blob_size;
 
-       if (ceph_snap(inode) != CEPH_NOSNAP)
-               return -EROFS;
-
        if (!ceph_is_valid_xattr(name))
                return -EOPNOTSUPP;
 
@@ -958,6 +975,18 @@ out:
        return err;
 }
 
+int ceph_setxattr(struct dentry *dentry, const char *name,
+                 const void *value, size_t size, int flags)
+{
+       if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP)
+               return -EROFS;
+
+       if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+               return generic_setxattr(dentry, name, value, size, flags);
+
+       return __ceph_setxattr(dentry, name, value, size, flags);
+}
+
 static int ceph_send_removexattr(struct dentry *dentry, const char *name)
 {
        struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
@@ -984,7 +1013,7 @@ static int ceph_send_removexattr(struct dentry *dentry, const char *name)
        return err;
 }
 
-int ceph_removexattr(struct dentry *dentry, const char *name)
+int __ceph_removexattr(struct dentry *dentry, const char *name)
 {
        struct inode *inode = dentry->d_inode;
        struct ceph_vxattr *vxattr;
@@ -994,9 +1023,6 @@ int ceph_removexattr(struct dentry *dentry, const char *name)
        int required_blob_size;
        int dirty;
 
-       if (ceph_snap(inode) != CEPH_NOSNAP)
-               return -EROFS;
-
        if (!ceph_is_valid_xattr(name))
                return -EOPNOTSUPP;
 
@@ -1053,3 +1079,13 @@ out:
        return err;
 }
 
+int ceph_removexattr(struct dentry *dentry, const char *name)
+{
+       if (ceph_snap(dentry->d_inode) != CEPH_NOSNAP)
+               return -EROFS;
+
+       if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+               return generic_removexattr(dentry, name);
+
+       return __ceph_removexattr(dentry, name);
+}