1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Object Devices Class Driver
6 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
8 * This file is part of the Lustre file system, http://www.lustre.org
9 * Lustre is a trademark of Cluster File Systems, Inc.
11 * You may have signed or agreed to another license before downloading
12 * this software. If so, you are bound by the terms and conditions
13 * of that agreement, and the following does not apply to you. See the
14 * LICENSE file included with this distribution for more information.
16 * If you did not agree to a different license, then this copy of Lustre
17 * is open source software; you can redistribute it and/or modify it
18 * under the terms of version 2 of the GNU General Public License as
19 * published by the Free Software Foundation.
21 * In either case, Lustre is distributed in the hope that it will be
22 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
23 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * license text for more details.
26 * These are the only exported functions, they provide some generic
27 * infrastructure for managing object devices
30 #define DEBUG_SUBSYSTEM S_CLASS
32 # define EXPORT_SYMTAB
36 #include <liblustre.h>
38 #include <linux/module.h>
39 #include <obd_class.h>
40 #include <lustre/lustre_idl.h>
45 #include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */
47 /* WARNING: the file systems must take care not to tinker with
48 attributes they don't manage (such as blocks). */
49 void obdo_from_inode(struct obdo *dst, struct inode *src, obd_flag valid)
51 obd_flag newvalid = 0;
53 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
54 CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
55 valid, LTIME_S(src->i_mtime),
56 LTIME_S(src->i_ctime));
58 if (valid & OBD_MD_FLATIME) {
59 dst->o_atime = LTIME_S(src->i_atime);
60 newvalid |= OBD_MD_FLATIME;
62 if (valid & OBD_MD_FLMTIME) {
63 dst->o_mtime = LTIME_S(src->i_mtime);
64 newvalid |= OBD_MD_FLMTIME;
66 if (valid & OBD_MD_FLCTIME) {
67 dst->o_ctime = LTIME_S(src->i_ctime);
68 newvalid |= OBD_MD_FLCTIME;
70 if (valid & OBD_MD_FLSIZE) {
71 dst->o_size = i_size_read(src);
72 newvalid |= OBD_MD_FLSIZE;
74 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
75 dst->o_blocks = src->i_blocks;
76 newvalid |= OBD_MD_FLBLOCKS;
78 if (valid & OBD_MD_FLBLKSZ) { /* optimal block size */
79 dst->o_blksize = 1 << src->i_blkbits;
80 newvalid |= OBD_MD_FLBLKSZ;
82 if (valid & OBD_MD_FLTYPE) {
83 dst->o_mode = (dst->o_mode & S_IALLUGO)|(src->i_mode & S_IFMT);
84 newvalid |= OBD_MD_FLTYPE;
86 if (valid & OBD_MD_FLMODE) {
87 dst->o_mode = (dst->o_mode & S_IFMT)|(src->i_mode & S_IALLUGO);
88 newvalid |= OBD_MD_FLMODE;
90 if (valid & OBD_MD_FLUID) {
91 dst->o_uid = src->i_uid;
92 newvalid |= OBD_MD_FLUID;
94 if (valid & OBD_MD_FLGID) {
95 dst->o_gid = src->i_gid;
96 newvalid |= OBD_MD_FLGID;
98 if (valid & OBD_MD_FLFLAGS) {
99 dst->o_flags = src->i_flags;
100 newvalid |= OBD_MD_FLFLAGS;
102 if (valid & OBD_MD_FLGENER) {
103 dst->o_generation = src->i_generation;
104 newvalid |= OBD_MD_FLGENER;
106 if (valid & OBD_MD_FLFID) {
107 dst->o_fid = src->i_ino;
108 newvalid |= OBD_MD_FLFID;
111 dst->o_valid |= newvalid;
113 EXPORT_SYMBOL(obdo_from_inode);
115 /*FIXME: Just copy from obdo_from_inode*/
116 void obdo_from_la(struct obdo *dst, struct lu_attr *la, obd_flag valid)
118 obd_flag newvalid = 0;
120 if (valid & OBD_MD_FLATIME) {
121 dst->o_atime = la->la_atime;
122 newvalid |= OBD_MD_FLATIME;
124 if (valid & OBD_MD_FLMTIME) {
125 dst->o_mtime = la->la_mtime;
126 newvalid |= OBD_MD_FLMTIME;
128 if (valid & OBD_MD_FLCTIME) {
129 dst->o_ctime = la->la_ctime;
130 newvalid |= OBD_MD_FLCTIME;
132 if (valid & OBD_MD_FLSIZE) {
133 dst->o_size = la->la_size;
134 newvalid |= OBD_MD_FLSIZE;
136 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
137 dst->o_blocks = la->la_blocks;
138 newvalid |= OBD_MD_FLBLOCKS;
140 if (valid & OBD_MD_FLTYPE) {
141 dst->o_mode = (dst->o_mode & S_IALLUGO)|(la->la_mode & S_IFMT);
142 newvalid |= OBD_MD_FLTYPE;
144 if (valid & OBD_MD_FLMODE) {
145 dst->o_mode = (dst->o_mode & S_IFMT)|(la->la_mode & S_IALLUGO);
146 newvalid |= OBD_MD_FLMODE;
148 if (valid & OBD_MD_FLUID) {
149 dst->o_uid = la->la_uid;
150 newvalid |= OBD_MD_FLUID;
152 if (valid & OBD_MD_FLGID) {
153 dst->o_gid = la->la_gid;
154 newvalid |= OBD_MD_FLGID;
156 dst->o_valid |= newvalid;
158 EXPORT_SYMBOL(obdo_from_la);
160 void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid)
162 valid &= src->o_valid;
164 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
166 "valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n",
167 src->o_valid, LTIME_S(dst->i_mtime),
168 LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
170 if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
171 LTIME_S(dst->i_atime) = src->o_atime;
173 /* mtime is always updated with ctime, but can be set in past.
174 As write and utime(2) may happen within 1 second, and utime's
175 mtime has a priority over write's one, leave mtime from mds
176 for the same ctimes. */
177 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime)) {
178 LTIME_S(dst->i_ctime) = src->o_ctime;
179 if (valid & OBD_MD_FLMTIME)
180 LTIME_S(dst->i_mtime) = src->o_mtime;
182 if (valid & OBD_MD_FLSIZE)
183 i_size_write(dst, src->o_size);
184 /* optimum IO size */
185 if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits)) {
186 dst->i_blkbits = ffs(src->o_blksize) - 1;
187 #ifdef HAVE_INODE_BLKSIZE
188 dst->i_blksize = src->o_blksize;
192 if (dst->i_blkbits < CFS_PAGE_SHIFT) {
193 #ifdef HAVE_INODE_BLKSIZE
194 dst->i_blksize = CFS_PAGE_SIZE;
196 dst->i_blkbits = CFS_PAGE_SHIFT;
199 /* allocation of space */
200 if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
201 dst->i_blocks = src->o_blocks;
203 EXPORT_SYMBOL(obdo_refresh_inode);
205 void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid)
207 valid &= src->o_valid;
209 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
211 "valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n",
212 src->o_valid, LTIME_S(dst->i_mtime),
213 LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
215 if (valid & OBD_MD_FLATIME)
216 LTIME_S(dst->i_atime) = src->o_atime;
217 if (valid & OBD_MD_FLMTIME)
218 LTIME_S(dst->i_mtime) = src->o_mtime;
219 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
220 LTIME_S(dst->i_ctime) = src->o_ctime;
221 if (valid & OBD_MD_FLSIZE)
222 i_size_write(dst, src->o_size);
223 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
224 dst->i_blocks = src->o_blocks;
225 if (dst->i_blocks < src->o_blocks) /* overflow */
229 if (valid & OBD_MD_FLBLKSZ) {
230 dst->i_blkbits = ffs(src->o_blksize)-1;
231 #ifdef HAVE_INODE_BLKSIZE
232 dst->i_blksize = src->o_blksize;
235 if (valid & OBD_MD_FLTYPE)
236 dst->i_mode = (dst->i_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
237 if (valid & OBD_MD_FLMODE)
238 dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
239 if (valid & OBD_MD_FLUID)
240 dst->i_uid = src->o_uid;
241 if (valid & OBD_MD_FLGID)
242 dst->i_gid = src->o_gid;
243 if (valid & OBD_MD_FLFLAGS)
244 dst->i_flags = src->o_flags;
245 if (valid & OBD_MD_FLGENER)
246 dst->i_generation = src->o_generation;
248 EXPORT_SYMBOL(obdo_to_inode);