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 Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * These are the only exported functions, they provide some generic
24 * infrastructure for managing object devices
27 #define DEBUG_SUBSYSTEM S_CLASS
30 #include <linux/module.h>
31 #include <linux/obd_class.h>
32 #include <linux/lustre_idl.h>
37 void obdo_from_iattr(struct obdo *oa, struct iattr *attr, unsigned int ia_valid)
39 if (ia_valid & ATTR_ATIME) {
40 oa->o_atime = LTIME_S(attr->ia_atime);
41 oa->o_valid |= OBD_MD_FLATIME;
43 if (ia_valid & ATTR_MTIME) {
44 oa->o_mtime = LTIME_S(attr->ia_mtime);
45 oa->o_valid |= OBD_MD_FLMTIME;
47 if (ia_valid & ATTR_CTIME) {
48 oa->o_ctime = LTIME_S(attr->ia_ctime);
49 oa->o_valid |= OBD_MD_FLCTIME;
51 if (ia_valid & ATTR_SIZE) {
52 oa->o_size = attr->ia_size;
53 oa->o_valid |= OBD_MD_FLSIZE;
55 if (ia_valid & ATTR_MODE) {
56 oa->o_mode = attr->ia_mode;
57 oa->o_valid |= OBD_MD_FLTYPE | OBD_MD_FLMODE;
58 if (!in_group_p(oa->o_gid) && !capable(CAP_FSETID))
59 oa->o_mode &= ~S_ISGID;
61 if (ia_valid & ATTR_UID) {
62 oa->o_uid = attr->ia_uid;
63 oa->o_valid |= OBD_MD_FLUID;
65 if (ia_valid & ATTR_GID) {
66 oa->o_gid = attr->ia_gid;
67 oa->o_valid |= OBD_MD_FLGID;
70 EXPORT_SYMBOL(obdo_from_iattr);
72 void iattr_from_obdo(struct iattr *attr, struct obdo *oa, obd_flag valid)
76 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
77 CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
78 oa->o_valid, (long)oa->o_mtime, (long)oa->o_ctime);
81 if (valid & OBD_MD_FLATIME) {
82 LTIME_S(attr->ia_atime) = oa->o_atime;
83 attr->ia_valid |= ATTR_ATIME;
85 if (valid & OBD_MD_FLMTIME) {
86 LTIME_S(attr->ia_mtime) = oa->o_mtime;
87 attr->ia_valid |= ATTR_MTIME;
89 if (valid & OBD_MD_FLCTIME) {
90 LTIME_S(attr->ia_ctime) = oa->o_ctime;
91 attr->ia_valid |= ATTR_CTIME;
93 if (valid & OBD_MD_FLSIZE) {
94 attr->ia_size = oa->o_size;
95 attr->ia_valid |= ATTR_SIZE;
97 #if 0 /* you shouldn't be able to change a file's type with setattr */
98 if (valid & OBD_MD_FLTYPE) {
99 attr->ia_mode = (attr->ia_mode & ~S_IFMT)|(oa->o_mode & S_IFMT);
100 attr->ia_valid |= ATTR_MODE;
103 if (valid & OBD_MD_FLMODE) {
104 attr->ia_mode = (attr->ia_mode & S_IFMT)|(oa->o_mode & ~S_IFMT);
105 attr->ia_valid |= ATTR_MODE;
106 if (!in_group_p(oa->o_gid) && !capable(CAP_FSETID))
107 attr->ia_mode &= ~S_ISGID;
109 if (valid & OBD_MD_FLUID) {
110 attr->ia_uid = oa->o_uid;
111 attr->ia_valid |= ATTR_UID;
113 if (valid & OBD_MD_FLGID) {
114 attr->ia_gid = oa->o_gid;
115 attr->ia_valid |= ATTR_GID;
118 EXPORT_SYMBOL(iattr_from_obdo);
120 /* WARNING: the file systems must take care not to tinker with
121 attributes they don't manage (such as blocks). */
122 void obdo_from_inode(struct obdo *dst, struct inode *src, obd_flag valid)
124 obd_flag newvalid = 0;
126 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
127 CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
128 valid, src->i_mtime, src->i_ctime);
130 if (valid & OBD_MD_FLATIME) {
131 dst->o_atime = LTIME_S(src->i_atime);
132 newvalid |= OBD_MD_FLATIME;
134 if (valid & OBD_MD_FLMTIME) {
135 dst->o_mtime = LTIME_S(src->i_mtime);
136 newvalid |= OBD_MD_FLMTIME;
138 if (valid & OBD_MD_FLCTIME) {
139 dst->o_ctime = LTIME_S(src->i_ctime);
140 newvalid |= OBD_MD_FLCTIME;
142 if (valid & OBD_MD_FLSIZE) {
143 dst->o_size = src->i_size;
144 newvalid |= OBD_MD_FLSIZE;
146 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
147 dst->o_blocks = src->i_blocks;
148 newvalid |= OBD_MD_FLBLOCKS;
150 if (valid & OBD_MD_FLBLKSZ) { /* optimal block size */
151 dst->o_blksize = src->i_blksize;
152 newvalid |= OBD_MD_FLBLKSZ;
154 if (valid & OBD_MD_FLTYPE) {
155 dst->o_mode = (dst->o_mode & S_IALLUGO)|(src->i_mode & S_IFMT);
156 newvalid |= OBD_MD_FLTYPE;
158 if (valid & OBD_MD_FLMODE) {
159 dst->o_mode = (dst->o_mode & S_IFMT)|(src->i_mode & S_IALLUGO);
160 newvalid |= OBD_MD_FLMODE;
162 if (valid & OBD_MD_FLUID) {
163 dst->o_uid = src->i_uid;
164 newvalid |= OBD_MD_FLUID;
166 if (valid & OBD_MD_FLGID) {
167 dst->o_gid = src->i_gid;
168 newvalid |= OBD_MD_FLGID;
170 if (valid & OBD_MD_FLFLAGS) {
171 dst->o_flags = src->i_flags;
172 newvalid |= OBD_MD_FLFLAGS;
174 if (valid & OBD_MD_FLNLINK) {
175 dst->o_nlink = src->i_nlink;
176 newvalid |= OBD_MD_FLNLINK;
178 if (valid & OBD_MD_FLGENER) {
179 dst->o_generation = src->i_generation;
180 newvalid |= OBD_MD_FLGENER;
182 if (valid & OBD_MD_FLRDEV) {
183 dst->o_rdev = (__u32)kdev_t_to_nr(src->i_rdev);
184 newvalid |= OBD_MD_FLRDEV;
187 dst->o_valid |= newvalid;
189 EXPORT_SYMBOL(obdo_from_inode);
191 void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid)
193 valid &= src->o_valid;
195 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
196 CDEBUG(D_INODE, "valid %x, cur time %lu/%lu, new %lu/%lu\n",
197 src->o_valid, dst->i_mtime, dst->i_ctime,
198 (long)src->o_mtime, (long)src->o_ctime);
200 if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
201 LTIME_S(dst->i_atime) = src->o_atime;
202 if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime))
203 LTIME_S(dst->i_mtime) = src->o_mtime;
204 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
205 LTIME_S(dst->i_ctime) = src->o_ctime;
206 if (valid & OBD_MD_FLSIZE && src->o_size > dst->i_size)
207 dst->i_size = src->o_size;
208 /* optimum IO size */
209 if (valid & OBD_MD_FLBLKSZ)
210 dst->i_blksize = src->o_blksize;
211 /* allocation of space */
212 if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
213 dst->i_blocks = src->o_blocks;
215 EXPORT_SYMBOL(obdo_refresh_inode);
217 void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid)
219 valid &= src->o_valid;
221 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
222 CDEBUG(D_INODE, "valid %x, cur time %lu/%lu, new %lu/%lu\n",
223 src->o_valid, dst->i_mtime, dst->i_ctime,
224 (long)src->o_mtime, (long)src->o_ctime);
226 if (valid & OBD_MD_FLATIME)
227 LTIME_S(dst->i_atime) = src->o_atime;
228 if (valid & OBD_MD_FLMTIME)
229 LTIME_S(dst->i_mtime) = src->o_mtime;
230 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
231 LTIME_S(dst->i_ctime) = src->o_ctime;
232 if (valid & OBD_MD_FLSIZE)
233 dst->i_size = src->o_size;
234 if (valid & OBD_MD_FLBLOCKS) /* allocation of space */
235 dst->i_blocks = src->o_blocks;
236 if (valid & OBD_MD_FLBLKSZ)
237 dst->i_blksize = src->o_blksize;
238 if (valid & OBD_MD_FLTYPE)
239 dst->i_mode = (dst->i_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
240 if (valid & OBD_MD_FLMODE)
241 dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
242 if (valid & OBD_MD_FLUID)
243 dst->i_uid = src->o_uid;
244 if (valid & OBD_MD_FLGID)
245 dst->i_gid = src->o_gid;
246 if (valid & OBD_MD_FLFLAGS)
247 dst->i_flags = src->o_flags;
248 if (valid & OBD_MD_FLNLINK)
249 dst->i_nlink = src->o_nlink;
250 if (valid & OBD_MD_FLGENER)
251 dst->i_generation = src->o_generation;
252 if (valid & OBD_MD_FLRDEV)
253 dst->i_rdev = to_kdev_t(src->o_rdev);
255 EXPORT_SYMBOL(obdo_to_inode);
258 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag valid)
261 CDEBUG(D_INODE, "src obdo "LPX64" valid 0x%x, dst obdo "LPX64"\n",
262 src->o_id, src->o_valid, dst->o_id);
264 if (valid & OBD_MD_FLATIME)
265 dst->o_atime = src->o_atime;
266 if (valid & OBD_MD_FLMTIME)
267 dst->o_mtime = src->o_mtime;
268 if (valid & OBD_MD_FLCTIME)
269 dst->o_ctime = src->o_ctime;
270 if (valid & OBD_MD_FLSIZE)
271 dst->o_size = src->o_size;
272 if (valid & OBD_MD_FLBLOCKS) /* allocation of space */
273 dst->o_blocks = src->o_blocks;
274 if (valid & OBD_MD_FLBLKSZ)
275 dst->o_blksize = src->o_blksize;
276 if (valid & OBD_MD_FLTYPE)
277 dst->o_mode = (dst->o_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
278 if (valid & OBD_MD_FLMODE)
279 dst->o_mode = (dst->o_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
280 if (valid & OBD_MD_FLUID)
281 dst->o_uid = src->o_uid;
282 if (valid & OBD_MD_FLGID)
283 dst->o_gid = src->o_gid;
284 if (valid & OBD_MD_FLFLAGS)
285 dst->o_flags = src->o_flags;
287 if (valid & OBD_MD_FLOBDFLG)
288 dst->o_obdflags = src->o_obdflags;
290 if (valid & OBD_MD_FLNLINK)
291 dst->o_nlink = src->o_nlink;
292 if (valid & OBD_MD_FLGENER)
293 dst->o_generation = src->o_generation;
294 if (valid & OBD_MD_FLRDEV)
295 dst->o_rdev = src->o_rdev;
296 if (valid & OBD_MD_FLINLINE &&
297 src->o_obdflags & OBD_FL_INLINEDATA) {
298 memcpy(dst->o_inline, src->o_inline, sizeof(src->o_inline));
299 dst->o_obdflags |= OBD_FL_INLINEDATA;
302 dst->o_valid |= valid;
304 EXPORT_SYMBOL(obdo_cpy_md);
306 /* returns FALSE if comparison (by flags) is same, TRUE if changed */
307 int obdo_cmp_md(struct obdo *dst, struct obdo *src, obd_flag compare)
311 if ( compare & OBD_MD_FLATIME )
312 res = (res || (dst->o_atime != src->o_atime));
313 if ( compare & OBD_MD_FLMTIME )
314 res = (res || (dst->o_mtime != src->o_mtime));
315 if ( compare & OBD_MD_FLCTIME )
316 res = (res || (dst->o_ctime != src->o_ctime));
317 if ( compare & OBD_MD_FLSIZE )
318 res = (res || (dst->o_size != src->o_size));
319 if ( compare & OBD_MD_FLBLOCKS ) /* allocation of space */
320 res = (res || (dst->o_blocks != src->o_blocks));
321 if ( compare & OBD_MD_FLBLKSZ )
322 res = (res || (dst->o_blksize != src->o_blksize));
323 if ( compare & OBD_MD_FLTYPE )
324 res = (res || (((dst->o_mode ^ src->o_mode) & S_IFMT) != 0));
325 if ( compare & OBD_MD_FLMODE )
326 res = (res || (((dst->o_mode ^ src->o_mode) & ~S_IFMT) != 0));
327 if ( compare & OBD_MD_FLUID )
328 res = (res || (dst->o_uid != src->o_uid));
329 if ( compare & OBD_MD_FLGID )
330 res = (res || (dst->o_gid != src->o_gid));
331 if ( compare & OBD_MD_FLFLAGS )
332 res = (res || (dst->o_flags != src->o_flags));
333 if ( compare & OBD_MD_FLNLINK )
334 res = (res || (dst->o_nlink != src->o_nlink));
335 if ( compare & OBD_MD_FLGENER )
336 res = (res || (dst->o_generation != src->o_generation));
337 /* XXX Don't know if thses should be included here - wasn't previously
338 if ( compare & OBD_MD_FLINLINE )
339 res = (res || memcmp(dst->o_inline, src->o_inline));
343 EXPORT_SYMBOL(obdo_cmp_md);