drivers/staging/lustre/lustre/obdclass/obdo.c

   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
  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). */
  59 void obdo_from_inode(struct obdo *dst, struct inode *src, obd_flag valid)
  60 {
  61         obd_flag 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 = ll_inode_blksize(src);
  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 = ll_inode_flags(src);
 112                 newvalid |= OBD_MD_FLFLAGS;
 113         }
 114         dst->o_valid |= newvalid;
 115 }
 116 EXPORT_SYMBOL(obdo_from_inode);
 117
 118 void obdo_cpy_md(struct obdo *dst, struct obdo *src, obd_flag 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 */
 160 int obdo_cmp_md(struct obdo *dst, struct obdo *src, obd_flag compare)
 161 {
 162         int res = 0;
 163
 164         if ( compare & OBD_MD_FLATIME )
 165                 res = (res || (dst->o_atime != src->o_atime));
 166         if ( compare & OBD_MD_FLMTIME )
 167                 res = (res || (dst->o_mtime != src->o_mtime));
 168         if ( compare & OBD_MD_FLCTIME )
 169                 res = (res || (dst->o_ctime != src->o_ctime));
 170         if ( compare & OBD_MD_FLSIZE )
 171                 res = (res || (dst->o_size != src->o_size));
 172         if ( compare & OBD_MD_FLBLOCKS ) /* allocation of space */
 173                 res = (res || (dst->o_blocks != src->o_blocks));
 174         if ( compare & OBD_MD_FLBLKSZ )
 175                 res = (res || (dst->o_blksize != src->o_blksize));
 176         if ( compare & OBD_MD_FLTYPE )
 177                 res = (res || (((dst->o_mode ^ src->o_mode) & S_IFMT) != 0));
 178         if ( compare & OBD_MD_FLMODE )
 179                 res = (res || (((dst->o_mode ^ src->o_mode) & ~S_IFMT) != 0));
 180         if ( compare & OBD_MD_FLUID )
 181                 res = (res || (dst->o_uid != src->o_uid));
 182         if ( compare & OBD_MD_FLGID )
 183                 res = (res || (dst->o_gid != src->o_gid));
 184         if ( compare & OBD_MD_FLFLAGS )
 185                 res = (res || (dst->o_flags != src->o_flags));
 186         if ( compare & OBD_MD_FLNLINK )
 187                 res = (res || (dst->o_nlink != src->o_nlink));
 188         if ( compare & OBD_MD_FLFID ) {
 189                 res = (res || (dst->o_parent_seq != src->o_parent_seq));
 190                 res = (res || (dst->o_parent_ver != src->o_parent_ver));
 191         }
 192         if ( compare & OBD_MD_FLGENER )
 193                 res = (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 = (res || memcmp(dst->o_inline, src->o_inline));
 197         */
 198         return res;
 199 }
 200 EXPORT_SYMBOL(obdo_cmp_md);
 201
 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
 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
 250 void iattr_from_obdo(struct iattr *attr, struct obdo *oa, obd_flag 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
 299 void md_from_obdo(struct md_op_data *op_data, struct obdo *oa, obd_flag 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
 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
 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
 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);