1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/linux/linux-obdo.c
38 * Object Devices Class Driver
39 * These are the only exported functions, they provide some generic
40 * infrastructure for managing object devices
43 #define DEBUG_SUBSYSTEM S_CLASS
45 # define EXPORT_SYMTAB
49 #include <liblustre.h>
51 #include <linux/module.h>
52 #include <obd_class.h>
53 #include <lustre/lustre_idl.h>
58 #include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */
60 /* WARNING: the file systems must take care not to tinker with
61 attributes they don't manage (such as blocks). */
62 void obdo_from_inode(struct obdo *dst, struct inode *src, obd_flag valid)
64 obd_flag newvalid = 0;
66 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
67 CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
68 valid, LTIME_S(src->i_mtime),
69 LTIME_S(src->i_ctime));
71 if (valid & OBD_MD_FLATIME) {
72 dst->o_atime = LTIME_S(src->i_atime);
73 newvalid |= OBD_MD_FLATIME;
75 if (valid & OBD_MD_FLMTIME) {
76 dst->o_mtime = LTIME_S(src->i_mtime);
77 newvalid |= OBD_MD_FLMTIME;
79 if (valid & OBD_MD_FLCTIME) {
80 dst->o_ctime = LTIME_S(src->i_ctime);
81 newvalid |= OBD_MD_FLCTIME;
83 if (valid & OBD_MD_FLSIZE) {
84 dst->o_size = i_size_read(src);
85 newvalid |= OBD_MD_FLSIZE;
87 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
88 dst->o_blocks = src->i_blocks;
89 newvalid |= OBD_MD_FLBLOCKS;
91 if (valid & OBD_MD_FLBLKSZ) { /* optimal block size */
92 dst->o_blksize = 1 << src->i_blkbits;
93 newvalid |= OBD_MD_FLBLKSZ;
95 if (valid & OBD_MD_FLTYPE) {
96 dst->o_mode = (dst->o_mode & S_IALLUGO)|(src->i_mode & S_IFMT);
97 newvalid |= OBD_MD_FLTYPE;
99 if (valid & OBD_MD_FLMODE) {
100 dst->o_mode = (dst->o_mode & S_IFMT)|(src->i_mode & S_IALLUGO);
101 newvalid |= OBD_MD_FLMODE;
103 if (valid & OBD_MD_FLUID) {
104 dst->o_uid = src->i_uid;
105 newvalid |= OBD_MD_FLUID;
107 if (valid & OBD_MD_FLGID) {
108 dst->o_gid = src->i_gid;
109 newvalid |= OBD_MD_FLGID;
111 if (valid & OBD_MD_FLFLAGS) {
112 dst->o_flags = src->i_flags;
113 newvalid |= OBD_MD_FLFLAGS;
115 if (valid & OBD_MD_FLGENER) {
116 dst->o_generation = src->i_generation;
117 newvalid |= OBD_MD_FLGENER;
119 if (valid & OBD_MD_FLFID) {
120 dst->o_fid = src->i_ino;
121 newvalid |= OBD_MD_FLFID;
124 dst->o_valid |= newvalid;
126 EXPORT_SYMBOL(obdo_from_inode);
128 /*FIXME: Just copy from obdo_from_inode*/
129 void obdo_from_la(struct obdo *dst, struct lu_attr *la, obd_flag valid)
131 obd_flag newvalid = 0;
133 if (valid & OBD_MD_FLATIME) {
134 dst->o_atime = la->la_atime;
135 newvalid |= OBD_MD_FLATIME;
137 if (valid & OBD_MD_FLMTIME) {
138 dst->o_mtime = la->la_mtime;
139 newvalid |= OBD_MD_FLMTIME;
141 if (valid & OBD_MD_FLCTIME) {
142 dst->o_ctime = la->la_ctime;
143 newvalid |= OBD_MD_FLCTIME;
145 if (valid & OBD_MD_FLSIZE) {
146 dst->o_size = la->la_size;
147 newvalid |= OBD_MD_FLSIZE;
149 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
150 dst->o_blocks = la->la_blocks;
151 newvalid |= OBD_MD_FLBLOCKS;
153 if (valid & OBD_MD_FLTYPE) {
154 dst->o_mode = (dst->o_mode & S_IALLUGO)|(la->la_mode & S_IFMT);
155 newvalid |= OBD_MD_FLTYPE;
157 if (valid & OBD_MD_FLMODE) {
158 dst->o_mode = (dst->o_mode & S_IFMT)|(la->la_mode & S_IALLUGO);
159 newvalid |= OBD_MD_FLMODE;
161 if (valid & OBD_MD_FLUID) {
162 dst->o_uid = la->la_uid;
163 newvalid |= OBD_MD_FLUID;
165 if (valid & OBD_MD_FLGID) {
166 dst->o_gid = la->la_gid;
167 newvalid |= OBD_MD_FLGID;
169 dst->o_valid |= newvalid;
171 EXPORT_SYMBOL(obdo_from_la);
173 void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid)
175 valid &= src->o_valid;
177 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
179 "valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n",
180 src->o_valid, LTIME_S(dst->i_mtime),
181 LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
183 if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
184 LTIME_S(dst->i_atime) = src->o_atime;
186 /* mtime is always updated with ctime, but can be set in past.
187 As write and utime(2) may happen within 1 second, and utime's
188 mtime has a priority over write's one, leave mtime from mds
189 for the same ctimes. */
190 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime)) {
191 LTIME_S(dst->i_ctime) = src->o_ctime;
192 if (valid & OBD_MD_FLMTIME)
193 LTIME_S(dst->i_mtime) = src->o_mtime;
195 if (valid & OBD_MD_FLSIZE)
196 i_size_write(dst, src->o_size);
197 /* optimum IO size */
198 if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits)) {
199 dst->i_blkbits = ffs(src->o_blksize) - 1;
200 #ifdef HAVE_INODE_BLKSIZE
201 dst->i_blksize = src->o_blksize;
205 if (dst->i_blkbits < CFS_PAGE_SHIFT) {
206 #ifdef HAVE_INODE_BLKSIZE
207 dst->i_blksize = CFS_PAGE_SIZE;
209 dst->i_blkbits = CFS_PAGE_SHIFT;
212 /* allocation of space */
213 if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
215 * XXX shouldn't overflow be checked here like in
218 dst->i_blocks = src->o_blocks;
220 EXPORT_SYMBOL(obdo_refresh_inode);
222 void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid)
224 valid &= src->o_valid;
226 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
228 "valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n",
229 src->o_valid, LTIME_S(dst->i_mtime),
230 LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
232 if (valid & OBD_MD_FLATIME)
233 LTIME_S(dst->i_atime) = src->o_atime;
234 if (valid & OBD_MD_FLMTIME)
235 LTIME_S(dst->i_mtime) = src->o_mtime;
236 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
237 LTIME_S(dst->i_ctime) = src->o_ctime;
238 if (valid & OBD_MD_FLSIZE)
239 i_size_write(dst, src->o_size);
240 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
241 dst->i_blocks = src->o_blocks;
242 if (dst->i_blocks < src->o_blocks) /* overflow */
246 if (valid & OBD_MD_FLBLKSZ) {
247 dst->i_blkbits = ffs(src->o_blksize)-1;
248 #ifdef HAVE_INODE_BLKSIZE
249 dst->i_blksize = src->o_blksize;
252 if (valid & OBD_MD_FLTYPE)
253 dst->i_mode = (dst->i_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
254 if (valid & OBD_MD_FLMODE)
255 dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
256 if (valid & OBD_MD_FLUID)
257 dst->i_uid = src->o_uid;
258 if (valid & OBD_MD_FLGID)
259 dst->i_gid = src->o_gid;
260 if (valid & OBD_MD_FLFLAGS)
261 dst->i_flags = src->o_flags;
262 if (valid & OBD_MD_FLGENER)
263 dst->i_generation = src->o_generation;
265 EXPORT_SYMBOL(obdo_to_inode);