Add way to query creation time of file via cifs xattr (66098044) · Commits · 戴 / test

fs/cifs/xattr.c

+27 −1

Original line number	Diff line number	Diff line
		@@ -34,7 +34,7 @@
		#define MAX_EA_VALUE_SIZE 65535
		#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
		#define CIFS_XATTR_ATTRIB "cifs.dosattrib" /* full name: user.cifs.dosattrib */

		#define CIFS_XATTR_CREATETIME "cifs.creationtime" /* user.cifs.creationtime */
		/* BB need to add server (Samba e.g) support for security and trusted prefix */

		enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT };
		@@ -169,6 +169,29 @@ static int cifs_attrib_get(struct dentry *dentry,
		return sizeof(__u32);
		}

		static int cifs_creation_time_get(struct dentry dentry, struct inode inode,
		void *value, size_t size)
		{
		ssize_t rc;
		__u64 * pcreatetime;

		rc = cifs_revalidate_dentry_attr(dentry);
		if (rc)
		return rc;

		if ((value == NULL) \|\| (size == 0))
		return sizeof(__u64);
		else if (size < sizeof(__u64))
		return -ERANGE;

		/* return dos attributes as pseudo xattr */
		pcreatetime = (__u64 *)value;
		*pcreatetime = CIFS_I(inode)->createtime;
		return sizeof(__u64);

		return rc;
		}


		static int cifs_xattr_get(const struct xattr_handler *handler,
		struct dentry dentry, struct inode inode,
		@@ -202,6 +225,9 @@ static int cifs_xattr_get(const struct xattr_handler *handler,
		if (strcmp(name, CIFS_XATTR_ATTRIB) == 0) {
		rc = cifs_attrib_get(dentry, inode, value, size);
		break;
		} else if (strcmp(name, CIFS_XATTR_CREATETIME) == 0) {
		rc = cifs_creation_time_get(dentry, inode, value, size);
		break;
		}

		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)