From patchwork Tue May 8 04:40:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allison Henderson X-Patchwork-Id: 10385301 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D852660353 for ; Tue, 8 May 2018 04:43:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C9CB028CA9 for ; Tue, 8 May 2018 04:43:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BE66B28CBF; Tue, 8 May 2018 04:43:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1F51B28CA9 for ; Tue, 8 May 2018 04:43:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752351AbeEHEn2 (ORCPT ); Tue, 8 May 2018 00:43:28 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:38982 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751964AbeEHEn0 (ORCPT ); Tue, 8 May 2018 00:43:26 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w484grC1105671 for ; Tue, 8 May 2018 04:43:26 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : in-reply-to : references; s=corp-2017-10-26; bh=KBSejY6dixOVikH8hnLh5AYo0ggDgB2Syr+8R13a+V4=; b=gEdg4xJSX0ErxSNA0tvavExWusIxwKKhGZ5rSdtjlfWt7IO7lfkNs6IX6YLTwkqONySM +zGGsq/KzpMmAC8tNnbg9qPnwCB+SdC5zUvEaCblFyDxD3Xk0h9KbRhuckkVlu2ae1lH AxwHSqMiB9X2m15am4qoayTXLeCzzHsFVIjYNdar95vzK3H8cw79QRd5u/EJkMmdUiNc i5yiFGhRNk4LIa4cB3TWKPZCZyiLcl8t2M5E5LAmSkWg/ySlsnePncOYXDfCSnsQ0JAo ZkQpZXOlCy5vr8WI4SSzUmwwPfpRbB9+tGh80EBhStKBb9PwyclxKPW9Ie7j281sGmzN UA== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2120.oracle.com with ESMTP id 2hs5936sm4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 08 May 2018 04:43:26 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w484hPW3028832 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 8 May 2018 04:43:25 GMT Received: from abhmp0018.oracle.com (abhmp0018.oracle.com [141.146.116.24]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w484hPuE029366 for ; Tue, 8 May 2018 04:43:25 GMT Received: from localhost.localdomain (/72.210.40.165) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 07 May 2018 21:43:25 -0700 From: Allison Henderson To: linux-xfs@vger.kernel.org Subject: [PATCH 01/21] xfsprogs: Move xfs_attr.h to libxfs Date: Mon, 7 May 2018 21:40:59 -0700 Message-Id: <1525754479-12177-2-git-send-email-allison.henderson@oracle.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1525754479-12177-1-git-send-email-allison.henderson@oracle.com> References: <1525754479-12177-1-git-send-email-allison.henderson@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8886 signatures=668698 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1805080047 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch moves fs/xfs/xfs_attr.h to fs/xfs/libxfs/xfs_attr.h since xfs_attr.c is in libxfs. We will need these later in xfsprogs. Signed-off-by: Allison Henderson --- libxfs/Makefile | 1 + libxfs/xfs_attr.h | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 158 insertions(+) diff --git a/libxfs/Makefile b/libxfs/Makefile index 0470f5f..75ce980 100644 --- a/libxfs/Makefile +++ b/libxfs/Makefile @@ -21,6 +21,7 @@ HFILES = \ xfs_ag_resv.h \ xfs_alloc.h \ xfs_alloc_btree.h \ + xfs_attr.h \ xfs_attr_leaf.h \ xfs_attr_sf.h \ xfs_bit.h \ diff --git a/libxfs/xfs_attr.h b/libxfs/xfs_attr.h new file mode 100644 index 0000000..8abf398 --- /dev/null +++ b/libxfs/xfs_attr.h @@ -0,0 +1,157 @@ +/* + * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef __XFS_ATTR_H__ +#define __XFS_ATTR_H__ + +struct xfs_inode; +struct xfs_da_args; +struct xfs_attr_list_context; + +/* + * Large attribute lists are structured around Btrees where all the data + * elements are in the leaf nodes. Attribute names are hashed into an int, + * then that int is used as the index into the Btree. Since the hashval + * of an attribute name may not be unique, we may have duplicate keys. + * The internal links in the Btree are logical block offsets into the file. + * + * Small attribute lists use a different format and are packed as tightly + * as possible so as to fit into the literal area of the inode. + */ + +/*======================================================================== + * External interfaces + *========================================================================*/ + + +#define ATTR_DONTFOLLOW 0x0001 /* -- unused, from IRIX -- */ +#define ATTR_ROOT 0x0002 /* use attrs in root (trusted) namespace */ +#define ATTR_TRUST 0x0004 /* -- unused, from IRIX -- */ +#define ATTR_SECURE 0x0008 /* use attrs in security namespace */ +#define ATTR_CREATE 0x0010 /* pure create: fail if attr already exists */ +#define ATTR_REPLACE 0x0020 /* pure set: fail if attr does not exist */ + +#define ATTR_INCOMPLETE 0x4000 /* [kernel] return INCOMPLETE attr keys */ + +#define XFS_ATTR_FLAGS \ + { ATTR_DONTFOLLOW, "DONTFOLLOW" }, \ + { ATTR_ROOT, "ROOT" }, \ + { ATTR_TRUST, "TRUST" }, \ + { ATTR_SECURE, "SECURE" }, \ + { ATTR_CREATE, "CREATE" }, \ + { ATTR_REPLACE, "REPLACE" }, \ + { ATTR_KERNOTIME, "KERNOTIME" }, \ + { ATTR_KERNOVAL, "KERNOVAL" }, \ + { ATTR_INCOMPLETE, "INCOMPLETE" } + +/* + * The maximum size (into the kernel or returned from the kernel) of an + * attribute value or the buffer used for an attr_list() call. Larger + * sizes will result in an ERANGE return code. + */ +#define ATTR_MAX_VALUELEN (64*1024) /* max length of a value */ + +/* + * Define how lists of attribute names are returned to the user from + * the attr_list() call. A large, 32bit aligned, buffer is passed in + * along with its size. We put an array of offsets at the top that each + * reference an attrlist_ent_t and pack the attrlist_ent_t's at the bottom. + */ +typedef struct attrlist { + __s32 al_count; /* number of entries in attrlist */ + __s32 al_more; /* T/F: more attrs (do call again) */ + __s32 al_offset[1]; /* byte offsets of attrs [var-sized] */ +} attrlist_t; + +/* + * Show the interesting info about one attribute. This is what the + * al_offset[i] entry points to. + */ +typedef struct attrlist_ent { /* data from attr_list() */ + __u32 a_valuelen; /* number bytes in value of attr */ + char a_name[1]; /* attr name (NULL terminated) */ +} attrlist_ent_t; + +/* + * Given a pointer to the (char*) buffer containing the attr_list() result, + * and an index, return a pointer to the indicated attribute in the buffer. + */ +#define ATTR_ENTRY(buffer, index) \ + ((attrlist_ent_t *) \ + &((char *)buffer)[ ((attrlist_t *)(buffer))->al_offset[index] ]) + +/* + * Kernel-internal version of the attrlist cursor. + */ +typedef struct attrlist_cursor_kern { + __u32 hashval; /* hash value of next entry to add */ + __u32 blkno; /* block containing entry (suggestion) */ + __u32 offset; /* offset in list of equal-hashvals */ + __u16 pad1; /* padding to match user-level */ + __u8 pad2; /* padding to match user-level */ + __u8 initted; /* T/F: cursor has been initialized */ +} attrlist_cursor_kern_t; + + +/*======================================================================== + * Structure used to pass context around among the routines. + *========================================================================*/ + + +/* void; state communicated via *context */ +typedef void (*put_listent_func_t)(struct xfs_attr_list_context *, int, + unsigned char *, int, int); + +typedef struct xfs_attr_list_context { + struct xfs_trans *tp; + struct xfs_inode *dp; /* inode */ + struct attrlist_cursor_kern *cursor; /* position in list */ + char *alist; /* output buffer */ + int seen_enough; /* T/F: seen enough of list? */ + ssize_t count; /* num used entries */ + int dupcnt; /* count dup hashvals seen */ + int bufsize; /* total buffer size */ + int firstu; /* first used byte in buffer */ + int flags; /* from VOP call */ + int resynch; /* T/F: resynch with cursor */ + put_listent_func_t put_listent; /* list output fmt function */ + int index; /* index into output buffer */ +} xfs_attr_list_context_t; + + +/*======================================================================== + * Function prototypes for the kernel. + *========================================================================*/ + +/* + * Overall external interface routines. + */ +int xfs_attr_inactive(struct xfs_inode *dp); +int xfs_attr_list_int_ilocked(struct xfs_attr_list_context *); +int xfs_attr_list_int(struct xfs_attr_list_context *); +int xfs_inode_hasattr(struct xfs_inode *ip); +int xfs_attr_get_ilocked(struct xfs_inode *ip, struct xfs_da_args *args); +int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name, + unsigned char *value, int *valuelenp, int flags); +int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name, + unsigned char *value, int valuelen, int flags); +int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); +int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, + int flags, struct attrlist_cursor_kern *cursor); + + +#endif /* __XFS_ATTR_H__ */