1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 *
36 * lustre/obdclass/obdo.c
37 *
38 * Object Devices Class Driver
39 * These are the only exported functions, they provide some generic
40 * infrastructure for managing object devices
41 */
42
43 #define DEBUG_SUBSYSTEM S_CLASS
44
45 #include "../include/obd_class.h"
46 #include "../include/lustre/lustre_idl.h"
47
obdo_set_parent_fid(struct obdo * dst,const struct lu_fid * parent)48 void obdo_set_parent_fid(struct obdo *dst, const struct lu_fid *parent)
49 {
50 dst->o_parent_oid = fid_oid(parent);
51 dst->o_parent_seq = fid_seq(parent);
52 dst->o_parent_ver = fid_ver(parent);
53 dst->o_valid |= OBD_MD_FLGENER | OBD_MD_FLFID;
54 }
55 EXPORT_SYMBOL(obdo_set_parent_fid);
56
57 /* WARNING: the file systems must take care not to tinker with
58 attributes they don't manage (such as blocks). */
obdo_from_inode(struct obdo * dst,struct inode * src,u32 valid)59 void obdo_from_inode(struct obdo *dst, struct inode *src, u32 valid)
60 {
61 u32 newvalid = 0;
62
63 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
64 CDEBUG(D_INODE, "valid %x, new time %lu/%lu\n",
65 valid, LTIME_S(src->i_mtime),
66 LTIME_S(src->i_ctime));
67
68 if (valid & OBD_MD_FLATIME) {
69 dst->o_atime = LTIME_S(src->i_atime);
70 newvalid |= OBD_MD_FLATIME;
71 }
72 if (valid & OBD_MD_FLMTIME) {
73 dst->o_mtime = LTIME_S(src->i_mtime);
74 newvalid |= OBD_MD_FLMTIME;
75 }
76 if (valid & OBD_MD_FLCTIME) {
77 dst->o_ctime = LTIME_S(src->i_ctime);
78 newvalid |= OBD_MD_FLCTIME;
79 }
80 if (valid & OBD_MD_FLSIZE) {
81 dst->o_size = i_size_read(src);
82 newvalid |= OBD_MD_FLSIZE;
83 }
84 if (valid & OBD_MD_FLBLOCKS) { /* allocation of space (x512 bytes) */
85 dst->o_blocks = src->i_blocks;
86 newvalid |= OBD_MD_FLBLOCKS;
87 }
88 if (valid & OBD_MD_FLBLKSZ) { /* optimal block size */
89 dst->o_blksize = 1 << src->i_blkbits;
90 newvalid |= OBD_MD_FLBLKSZ;
91 }
92 if (valid & OBD_MD_FLTYPE) {
93 dst->o_mode = (dst->o_mode & S_IALLUGO) |
94 (src->i_mode & S_IFMT);
95 newvalid |= OBD_MD_FLTYPE;
96 }
97 if (valid & OBD_MD_FLMODE) {
98 dst->o_mode = (dst->o_mode & S_IFMT) |
99 (src->i_mode & S_IALLUGO);
100 newvalid |= OBD_MD_FLMODE;
101 }
102 if (valid & OBD_MD_FLUID) {
103 dst->o_uid = from_kuid(&init_user_ns, src->i_uid);
104 newvalid |= OBD_MD_FLUID;
105 }
106 if (valid & OBD_MD_FLGID) {
107 dst->o_gid = from_kgid(&init_user_ns, src->i_gid);
108 newvalid |= OBD_MD_FLGID;
109 }
110 if (valid & OBD_MD_FLFLAGS) {
111 dst->o_flags = src->i_flags;
112 newvalid |= OBD_MD_FLFLAGS;
113 }
114 dst->o_valid |= newvalid;
115 }
116 EXPORT_SYMBOL(obdo_from_inode);
117
obdo_cpy_md(struct obdo * dst,struct obdo * src,u32 valid)118 void obdo_cpy_md(struct obdo *dst, struct obdo *src, u32 valid)
119 {
120 CDEBUG(D_INODE, "src obdo "DOSTID" valid %#llx, dst obdo "DOSTID"\n",
121 POSTID(&src->o_oi), src->o_valid, POSTID(&dst->o_oi));
122 if (valid & OBD_MD_FLATIME)
123 dst->o_atime = src->o_atime;
124 if (valid & OBD_MD_FLMTIME)
125 dst->o_mtime = src->o_mtime;
126 if (valid & OBD_MD_FLCTIME)
127 dst->o_ctime = src->o_ctime;
128 if (valid & OBD_MD_FLSIZE)
129 dst->o_size = src->o_size;
130 if (valid & OBD_MD_FLBLOCKS) /* allocation of space */
131 dst->o_blocks = src->o_blocks;
132 if (valid & OBD_MD_FLBLKSZ)
133 dst->o_blksize = src->o_blksize;
134 if (valid & OBD_MD_FLTYPE)
135 dst->o_mode = (dst->o_mode & ~S_IFMT) | (src->o_mode & S_IFMT);
136 if (valid & OBD_MD_FLMODE)
137 dst->o_mode = (dst->o_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
138 if (valid & OBD_MD_FLUID)
139 dst->o_uid = src->o_uid;
140 if (valid & OBD_MD_FLGID)
141 dst->o_gid = src->o_gid;
142 if (valid & OBD_MD_FLFLAGS)
143 dst->o_flags = src->o_flags;
144 if (valid & OBD_MD_FLFID) {
145 dst->o_parent_seq = src->o_parent_seq;
146 dst->o_parent_ver = src->o_parent_ver;
147 }
148 if (valid & OBD_MD_FLGENER)
149 dst->o_parent_oid = src->o_parent_oid;
150 if (valid & OBD_MD_FLHANDLE)
151 dst->o_handle = src->o_handle;
152 if (valid & OBD_MD_FLCOOKIE)
153 dst->o_lcookie = src->o_lcookie;
154
155 dst->o_valid |= valid;
156 }
157 EXPORT_SYMBOL(obdo_cpy_md);
158
159 /* returns FALSE if comparison (by flags) is same, TRUE if changed */
obdo_cmp_md(struct obdo * dst,struct obdo * src,u32 compare)160 int obdo_cmp_md(struct obdo *dst, struct obdo *src, u32 compare)
161 {
162 int res = 0;
163
164 if (compare & OBD_MD_FLATIME)
165 res |= dst->o_atime != src->o_atime;
166 if (compare & OBD_MD_FLMTIME)
167 res |= dst->o_mtime != src->o_mtime;
168 if (compare & OBD_MD_FLCTIME)
169 res |= dst->o_ctime != src->o_ctime;
170 if (compare & OBD_MD_FLSIZE)
171 res |= dst->o_size != src->o_size;
172 if (compare & OBD_MD_FLBLOCKS) /* allocation of space */
173 res |= dst->o_blocks != src->o_blocks;
174 if (compare & OBD_MD_FLBLKSZ)
175 res |= dst->o_blksize != src->o_blksize;
176 if (compare & OBD_MD_FLTYPE)
177 res |= ((dst->o_mode ^ src->o_mode) & S_IFMT) != 0;
178 if (compare & OBD_MD_FLMODE)
179 res |= ((dst->o_mode ^ src->o_mode) & ~S_IFMT) != 0;
180 if (compare & OBD_MD_FLUID)
181 res |= dst->o_uid != src->o_uid;
182 if (compare & OBD_MD_FLGID)
183 res |= dst->o_gid != src->o_gid;
184 if (compare & OBD_MD_FLFLAGS)
185 res |= dst->o_flags != src->o_flags;
186 if (compare & OBD_MD_FLNLINK)
187 res |= dst->o_nlink != src->o_nlink;
188 if (compare & OBD_MD_FLFID) {
189 res |= dst->o_parent_seq != src->o_parent_seq;
190 res |= dst->o_parent_ver != src->o_parent_ver;
191 }
192 if (compare & OBD_MD_FLGENER)
193 res |= dst->o_parent_oid != src->o_parent_oid;
194 /* XXX Don't know if these should be included here - wasn't previously
195 if ( compare & OBD_MD_FLINLINE )
196 res |= memcmp(dst->o_inline, src->o_inline);
197 */
198 return res;
199 }
200 EXPORT_SYMBOL(obdo_cmp_md);
201
obdo_to_ioobj(struct obdo * oa,struct obd_ioobj * ioobj)202 void obdo_to_ioobj(struct obdo *oa, struct obd_ioobj *ioobj)
203 {
204 ioobj->ioo_oid = oa->o_oi;
205 if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP)))
206 ostid_set_seq_mdt0(&ioobj->ioo_oid);
207
208 /* Since 2.4 this does not contain o_mode in the low 16 bits.
209 * Instead, it holds (bd_md_max_brw - 1) for multi-bulk BRW RPCs */
210 ioobj->ioo_max_brw = 0;
211 }
212 EXPORT_SYMBOL(obdo_to_ioobj);
213
obdo_from_iattr(struct obdo * oa,struct iattr * attr,unsigned int ia_valid)214 void obdo_from_iattr(struct obdo *oa, struct iattr *attr, unsigned int ia_valid)
215 {
216 if (ia_valid & ATTR_ATIME) {
217 oa->o_atime = LTIME_S(attr->ia_atime);
218 oa->o_valid |= OBD_MD_FLATIME;
219 }
220 if (ia_valid & ATTR_MTIME) {
221 oa->o_mtime = LTIME_S(attr->ia_mtime);
222 oa->o_valid |= OBD_MD_FLMTIME;
223 }
224 if (ia_valid & ATTR_CTIME) {
225 oa->o_ctime = LTIME_S(attr->ia_ctime);
226 oa->o_valid |= OBD_MD_FLCTIME;
227 }
228 if (ia_valid & ATTR_SIZE) {
229 oa->o_size = attr->ia_size;
230 oa->o_valid |= OBD_MD_FLSIZE;
231 }
232 if (ia_valid & ATTR_MODE) {
233 oa->o_mode = attr->ia_mode;
234 oa->o_valid |= OBD_MD_FLTYPE | OBD_MD_FLMODE;
235 if (!in_group_p(make_kgid(&init_user_ns, oa->o_gid)) &&
236 !capable(CFS_CAP_FSETID))
237 oa->o_mode &= ~S_ISGID;
238 }
239 if (ia_valid & ATTR_UID) {
240 oa->o_uid = from_kuid(&init_user_ns, attr->ia_uid);
241 oa->o_valid |= OBD_MD_FLUID;
242 }
243 if (ia_valid & ATTR_GID) {
244 oa->o_gid = from_kgid(&init_user_ns, attr->ia_gid);
245 oa->o_valid |= OBD_MD_FLGID;
246 }
247 }
248 EXPORT_SYMBOL(obdo_from_iattr);
249
iattr_from_obdo(struct iattr * attr,struct obdo * oa,u32 valid)250 void iattr_from_obdo(struct iattr *attr, struct obdo *oa, u32 valid)
251 {
252 valid &= oa->o_valid;
253
254 if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
255 CDEBUG(D_INODE, "valid %#llx, new time %llu/%llu\n",
256 oa->o_valid, oa->o_mtime, oa->o_ctime);
257
258 attr->ia_valid = 0;
259 if (valid & OBD_MD_FLATIME) {
260 LTIME_S(attr->ia_atime) = oa->o_atime;
261 attr->ia_valid |= ATTR_ATIME;
262 }
263 if (valid & OBD_MD_FLMTIME) {
264 LTIME_S(attr->ia_mtime) = oa->o_mtime;
265 attr->ia_valid |= ATTR_MTIME;
266 }
267 if (valid & OBD_MD_FLCTIME) {
268 LTIME_S(attr->ia_ctime) = oa->o_ctime;
269 attr->ia_valid |= ATTR_CTIME;
270 }
271 if (valid & OBD_MD_FLSIZE) {
272 attr->ia_size = oa->o_size;
273 attr->ia_valid |= ATTR_SIZE;
274 }
275 #if 0 /* you shouldn't be able to change a file's type with setattr */
276 if (valid & OBD_MD_FLTYPE) {
277 attr->ia_mode = (attr->ia_mode & ~S_IFMT)|(oa->o_mode & S_IFMT);
278 attr->ia_valid |= ATTR_MODE;
279 }
280 #endif
281 if (valid & OBD_MD_FLMODE) {
282 attr->ia_mode = (attr->ia_mode & S_IFMT)|(oa->o_mode & ~S_IFMT);
283 attr->ia_valid |= ATTR_MODE;
284 if (!in_group_p(make_kgid(&init_user_ns, oa->o_gid)) &&
285 !capable(CFS_CAP_FSETID))
286 attr->ia_mode &= ~S_ISGID;
287 }
288 if (valid & OBD_MD_FLUID) {
289 attr->ia_uid = make_kuid(&init_user_ns, oa->o_uid);
290 attr->ia_valid |= ATTR_UID;
291 }
292 if (valid & OBD_MD_FLGID) {
293 attr->ia_gid = make_kgid(&init_user_ns, oa->o_gid);
294 attr->ia_valid |= ATTR_GID;
295 }
296 }
297 EXPORT_SYMBOL(iattr_from_obdo);
298
md_from_obdo(struct md_op_data * op_data,struct obdo * oa,u32 valid)299 void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, u32 valid)
300 {
301 iattr_from_obdo(&op_data->op_attr, oa, valid);
302 if (valid & OBD_MD_FLBLOCKS) {
303 op_data->op_attr_blocks = oa->o_blocks;
304 op_data->op_attr.ia_valid |= ATTR_BLOCKS;
305 }
306 if (valid & OBD_MD_FLFLAGS) {
307 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags =
308 oa->o_flags;
309 op_data->op_attr.ia_valid |= ATTR_ATTR_FLAG;
310 }
311 }
312 EXPORT_SYMBOL(md_from_obdo);
313
obdo_from_md(struct obdo * oa,struct md_op_data * op_data,unsigned int valid)314 void obdo_from_md(struct obdo *oa, struct md_op_data *op_data,
315 unsigned int valid)
316 {
317 obdo_from_iattr(oa, &op_data->op_attr, valid);
318 if (valid & ATTR_BLOCKS) {
319 oa->o_blocks = op_data->op_attr_blocks;
320 oa->o_valid |= OBD_MD_FLBLOCKS;
321 }
322 if (valid & ATTR_ATTR_FLAG) {
323 oa->o_flags =
324 ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags;
325 oa->o_valid |= OBD_MD_FLFLAGS;
326 }
327 }
328 EXPORT_SYMBOL(obdo_from_md);
329
obdo_cpu_to_le(struct obdo * dobdo,struct obdo * sobdo)330 void obdo_cpu_to_le(struct obdo *dobdo, struct obdo *sobdo)
331 {
332 dobdo->o_size = cpu_to_le64(sobdo->o_size);
333 dobdo->o_mtime = cpu_to_le64(sobdo->o_mtime);
334 dobdo->o_atime = cpu_to_le64(sobdo->o_atime);
335 dobdo->o_ctime = cpu_to_le64(sobdo->o_ctime);
336 dobdo->o_blocks = cpu_to_le64(sobdo->o_blocks);
337 dobdo->o_mode = cpu_to_le32(sobdo->o_mode);
338 dobdo->o_uid = cpu_to_le32(sobdo->o_uid);
339 dobdo->o_gid = cpu_to_le32(sobdo->o_gid);
340 dobdo->o_flags = cpu_to_le32(sobdo->o_flags);
341 dobdo->o_nlink = cpu_to_le32(sobdo->o_nlink);
342 dobdo->o_blksize = cpu_to_le32(sobdo->o_blksize);
343 dobdo->o_valid = cpu_to_le64(sobdo->o_valid);
344 }
345 EXPORT_SYMBOL(obdo_cpu_to_le);
346
obdo_le_to_cpu(struct obdo * dobdo,struct obdo * sobdo)347 void obdo_le_to_cpu(struct obdo *dobdo, struct obdo *sobdo)
348 {
349 dobdo->o_size = le64_to_cpu(sobdo->o_size);
350 dobdo->o_mtime = le64_to_cpu(sobdo->o_mtime);
351 dobdo->o_atime = le64_to_cpu(sobdo->o_atime);
352 dobdo->o_ctime = le64_to_cpu(sobdo->o_ctime);
353 dobdo->o_blocks = le64_to_cpu(sobdo->o_blocks);
354 dobdo->o_mode = le32_to_cpu(sobdo->o_mode);
355 dobdo->o_uid = le32_to_cpu(sobdo->o_uid);
356 dobdo->o_gid = le32_to_cpu(sobdo->o_gid);
357 dobdo->o_flags = le32_to_cpu(sobdo->o_flags);
358 dobdo->o_nlink = le32_to_cpu(sobdo->o_nlink);
359 dobdo->o_blksize = le32_to_cpu(sobdo->o_blksize);
360 dobdo->o_valid = le64_to_cpu(sobdo->o_valid);
361 }
362 EXPORT_SYMBOL(obdo_le_to_cpu);
363