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
29 # define EXPORT_SYMTAB
33 #include <liblustre.h>
35 #include <linux/module.h>
36 #include <linux/obd_class.h>
37 #include <linux/lustre_idl.h>
42 #include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */
44 void obdo_from_iattr(struct obdo *oa, struct iattr *attr, unsigned int ia_valid)
46 if (ia_valid & ATTR_ATIME) {
47 oa->o_atime = LTIME_S(attr->ia_atime);
48 oa->o_valid |= OBD_MD_FLATIME;
50 if (ia_valid & ATTR_MTIME) {
51 oa->o_mtime = LTIME_S(attr->ia_mtime);
52 oa->o_valid |= OBD_MD_FLMTIME;
54 if (ia_valid & ATTR_CTIME) {
55 oa->o_ctime = LTIME_S(attr->ia_ctime);
56 oa->o_valid |= OBD_MD_FLCTIME;
58 if (ia_valid & ATTR_SIZE) {
59 oa->o_size = attr->ia_size;
60 oa->o_valid |= OBD_MD_FLSIZE;
62 if (ia_valid & ATTR_MODE) {
63 oa->o_mode = attr->ia_mode;
64 oa->o_valid |= OBD_MD_FLTYPE | OBD_MD_FLMODE;
65 if (!in_group_p(oa->o_gid) && !capable(CAP_FSETID))
66 oa->o_mode &= ~S_ISGID;
68 if (ia_valid & ATTR_UID) {
69 oa->o_uid = attr->ia_uid;
70 oa->o_valid |= OBD_MD_FLUID;
72 if (ia_valid & ATTR_GID) {
73 oa->o_gid = attr->ia_gid;
74 oa->o_valid |= OBD_MD_FLGID;
77 EXPORT_SYMBOL(obdo_from_iattr);
79 void iattr_from_obdo(struct iattr *attr, struct obdo *oa, obd_valid valid)
83 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
84 CDEBUG(D_INODE, "valid "LPX64", new time %lu/%lu\n",
85 oa->o_valid, (long)oa->o_mtime, (long)oa->o_ctime);
88 if (valid & OBD_MD_FLATIME) {
89 LTIME_S(attr->ia_atime) = oa->o_atime;
90 attr->ia_valid |= ATTR_ATIME;
92 if (valid & OBD_MD_FLMTIME) {
93 LTIME_S(attr->ia_mtime) = oa->o_mtime;
94 attr->ia_valid |= ATTR_MTIME;
96 if (valid & OBD_MD_FLCTIME) {
97 LTIME_S(attr->ia_ctime) = oa->o_ctime;
98 attr->ia_valid |= ATTR_CTIME;
100 if (valid & OBD_MD_FLSIZE) {
101 attr->ia_size = oa->o_size;
102 attr->ia_valid |= ATTR_SIZE;
104 #if 0 /* you shouldn't be able to change a file's type with setattr */
105 if (valid & OBD_MD_FLTYPE) {
106 attr->ia_mode = (attr->ia_mode & ~S_IFMT)|(oa->o_mode & S_IFMT);
107 attr->ia_valid |= ATTR_MODE;
110 if (valid & OBD_MD_FLMODE) {
111 attr->ia_mode = (attr->ia_mode & S_IFMT)|(oa->o_mode & ~S_IFMT);
112 attr->ia_valid |= ATTR_MODE;
113 if (!in_group_p(oa->o_gid) && !capable(CAP_FSETID))
114 attr->ia_mode &= ~S_ISGID;
116 if (valid & OBD_MD_FLUID) {
117 attr->ia_uid = oa->o_uid;
118 attr->ia_valid |= ATTR_UID;
120 if (valid & OBD_MD_FLGID) {
121 attr->ia_gid = oa->o_gid;
122 attr->ia_valid |= ATTR_GID;
124 if (valid & OBD_MD_FLFLAGS) {
125 attr->ia_attr_flags = oa->o_flags;
126 attr->ia_valid |= ATTR_ATTR_FLAG;
129 EXPORT_SYMBOL(iattr_from_obdo);
131 /* WARNING: the file systems must take care not to tinker with
132 attributes they don't manage (such as blocks). */
133 void obdo_from_inode(struct obdo *dst, struct inode *src, obd_valid valid)
135 obd_valid newvalid = 0;
137 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
138 CDEBUG(D_INODE, "valid "LPX64", new time %lu/%lu\n",
139 valid, LTIME_S(src->i_mtime), LTIME_S(src->i_ctime));
141 if (valid & OBD_MD_FLATIME) {
142 dst->o_atime = LTIME_S(src->i_atime);
143 newvalid |= OBD_MD_FLATIME;
145 if (valid & OBD_MD_FLMTIME) {
146 dst->o_mtime = LTIME_S(src->i_mtime);
147 newvalid |= OBD_MD_FLMTIME;
149 if (valid & OBD_MD_FLCTIME) {
150 dst->o_ctime = LTIME_S(src->i_ctime);
151 newvalid |= OBD_MD_FLCTIME;
153 if (valid & OBD_MD_FLSIZE) {
154 dst->o_size = src->i_size;
155 newvalid |= OBD_MD_FLSIZE;
157 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
158 dst->o_blocks = src->i_blocks;
159 newvalid |= OBD_MD_FLBLOCKS;
161 if (valid & OBD_MD_FLBLKSZ) { /* optimal block size */
162 dst->o_blksize = src->i_blksize;
163 newvalid |= OBD_MD_FLBLKSZ;
165 if (valid & OBD_MD_FLTYPE) {
166 dst->o_mode = (dst->o_mode & S_IALLUGO)|(src->i_mode & S_IFMT);
167 newvalid |= OBD_MD_FLTYPE;
169 if (valid & OBD_MD_FLMODE) {
170 dst->o_mode = (dst->o_mode & S_IFMT)|(src->i_mode & S_IALLUGO);
171 newvalid |= OBD_MD_FLMODE;
173 if (valid & OBD_MD_FLUID) {
174 dst->o_uid = src->i_uid;
175 newvalid |= OBD_MD_FLUID;
177 if (valid & OBD_MD_FLGID) {
178 dst->o_gid = src->i_gid;
179 newvalid |= OBD_MD_FLGID;
181 if (valid & OBD_MD_FLFLAGS) {
182 dst->o_flags = src->i_flags;
183 newvalid |= OBD_MD_FLFLAGS;
185 if (valid & OBD_MD_FLGENER) {
186 dst->o_generation = src->i_generation;
187 newvalid |= OBD_MD_FLGENER;
190 dst->o_valid |= newvalid;
192 EXPORT_SYMBOL(obdo_from_inode);
194 void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_valid valid)
196 valid &= src->o_valid;
198 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
199 CDEBUG(D_INODE, "valid "LPX64", cur time %lu/%lu, new %lu/%lu\n",
200 src->o_valid, LTIME_S(dst->i_mtime),
201 LTIME_S(dst->i_ctime),
202 (long)src->o_mtime, (long)src->o_ctime);
204 if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
205 LTIME_S(dst->i_atime) = src->o_atime;
206 if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime))
207 LTIME_S(dst->i_mtime) = src->o_mtime;
208 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
209 LTIME_S(dst->i_ctime) = src->o_ctime;
210 if (valid & OBD_MD_FLSIZE)
211 dst->i_size = src->o_size;
212 /* optimum IO size */
213 if (valid & OBD_MD_FLBLKSZ && src->o_blksize > dst->i_blksize)
214 dst->i_blksize = src->o_blksize;
215 if (dst->i_blksize < PAGE_CACHE_SIZE)
216 dst->i_blksize = PAGE_CACHE_SIZE;
217 /* allocation of space */
218 if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
219 dst->i_blocks = src->o_blocks;
221 EXPORT_SYMBOL(obdo_refresh_inode);
223 void obdo_to_inode(struct inode *dst, struct obdo *src, obd_valid valid)
225 valid &= src->o_valid;
227 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
228 CDEBUG(D_INODE, "valid "LPX64", cur time %lu/%lu, new %lu/%lu\n",
230 LTIME_S(dst->i_mtime), LTIME_S(dst->i_ctime),
231 (long)src->o_mtime, (long)src->o_ctime);
233 if (valid & OBD_MD_FLATIME)
234 LTIME_S(dst->i_atime) = src->o_atime;
235 if (valid & OBD_MD_FLMTIME)
236 LTIME_S(dst->i_mtime) = src->o_mtime;
237 if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
238 LTIME_S(dst->i_ctime) = src->o_ctime;
239 if (valid & OBD_MD_FLSIZE)
240 dst->i_size = src->o_size;
241 if (valid & OBD_MD_FLBLOCKS) /* allocation of space */
242 dst->i_blocks = src->o_blocks;
243 if (valid & OBD_MD_FLBLKSZ)
244 dst->i_blksize = src->o_blksize;
245 if (valid & OBD_MD_FLTYPE)
246 dst->i_mode = (dst->i_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
247 if (valid & OBD_MD_FLMODE)
248 dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
249 if (valid & OBD_MD_FLUID)
250 dst->i_uid = src->o_uid;
251 if (valid & OBD_MD_FLGID)
252 dst->i_gid = src->o_gid;
253 if (valid & OBD_MD_FLFLAGS)
254 dst->i_flags = src->o_flags;
255 if (valid & OBD_MD_FLGENER)
256 dst->i_generation = src->o_generation;
258 EXPORT_SYMBOL(obdo_to_inode);
261 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_valid valid)
264 CDEBUG(D_INODE, "src obdo "LPX64" valid "LPX64", dst obdo "LPX64"\n",
265 src->o_id, src->o_valid, dst->o_id);
267 if (valid & OBD_MD_FLATIME)
268 dst->o_atime = src->o_atime;
269 if (valid & OBD_MD_FLMTIME)
270 dst->o_mtime = src->o_mtime;
271 if (valid & OBD_MD_FLCTIME)
272 dst->o_ctime = src->o_ctime;
273 if (valid & OBD_MD_FLSIZE)
274 dst->o_size = src->o_size;
275 if (valid & OBD_MD_FLBLOCKS) /* allocation of space */
276 dst->o_blocks = src->o_blocks;
277 if (valid & OBD_MD_FLBLKSZ)
278 dst->o_blksize = src->o_blksize;
279 if (valid & OBD_MD_FLTYPE)
280 dst->o_mode = (dst->o_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
281 if (valid & OBD_MD_FLMODE)
282 dst->o_mode = (dst->o_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
283 if (valid & OBD_MD_FLUID)
284 dst->o_uid = src->o_uid;
285 if (valid & OBD_MD_FLGID)
286 dst->o_gid = src->o_gid;
287 if (valid & OBD_MD_FLFLAGS)
288 dst->o_flags = src->o_flags;
289 if (valid & OBD_MD_FLGENER)
290 dst->o_generation = src->o_generation;
291 if (valid & OBD_MD_FLINLINE)
292 memcpy(dst->o_inline, src->o_inline, sizeof(src->o_inline));
294 dst->o_valid |= valid;
296 EXPORT_SYMBOL(obdo_cpy_md);
298 /* returns FALSE if comparison (by flags) is same, TRUE if changed */
299 int obdo_cmp_md(struct obdo *dst, struct obdo *src, obd_valid compare)
303 if ( compare & OBD_MD_FLATIME )
304 res = (res || (dst->o_atime != src->o_atime));
305 if ( compare & OBD_MD_FLMTIME )
306 res = (res || (dst->o_mtime != src->o_mtime));
307 if ( compare & OBD_MD_FLCTIME )
308 res = (res || (dst->o_ctime != src->o_ctime));
309 if ( compare & OBD_MD_FLSIZE )
310 res = (res || (dst->o_size != src->o_size));
311 if ( compare & OBD_MD_FLBLOCKS ) /* allocation of space */
312 res = (res || (dst->o_blocks != src->o_blocks));
313 if ( compare & OBD_MD_FLBLKSZ )
314 res = (res || (dst->o_blksize != src->o_blksize));
315 if ( compare & OBD_MD_FLTYPE )
316 res = (res || (((dst->o_mode ^ src->o_mode) & S_IFMT) != 0));
317 if ( compare & OBD_MD_FLMODE )
318 res = (res || (((dst->o_mode ^ src->o_mode) & ~S_IFMT) != 0));
319 if ( compare & OBD_MD_FLUID )
320 res = (res || (dst->o_uid != src->o_uid));
321 if ( compare & OBD_MD_FLGID )
322 res = (res || (dst->o_gid != src->o_gid));
323 if ( compare & OBD_MD_FLFLAGS )
324 res = (res || (dst->o_flags != src->o_flags));
325 if ( compare & OBD_MD_FLNLINK )
326 res = (res || (dst->o_nlink != src->o_nlink));
327 if ( compare & OBD_MD_FLGENER )
328 res = (res || (dst->o_generation != src->o_generation));
329 /* XXX Don't know if thses should be included here - wasn't previously
330 if ( compare & OBD_MD_FLINLINE )
331 res = (res || memcmp(dst->o_inline, src->o_inline));
335 EXPORT_SYMBOL(obdo_cmp_md);
337 void obdo_to_ioobj(struct obdo *oa, struct obd_ioobj *ioobj)
339 ioobj->ioo_id = oa->o_id;
340 if (oa->o_valid & OBD_MD_FLGROUP)
341 ioobj->ioo_gr = oa->o_gr;
344 ioobj->ioo_type = oa->o_mode;
346 EXPORT_SYMBOL(obdo_to_ioobj);