lustre/mdt/mdt_lib.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  lustre/mdt/mdt_lib.c
   5  *  Lustre Metadata Target (mdt) request unpacking helper.
   6  *
   7  *  Copyright (c) 2006 Cluster File Systems, Inc.
   8  *   Author: Peter Braam <braam@clusterfs.com>
   9  *   Author: Andreas Dilger <adilger@clusterfs.com>
  10  *   Author: Phil Schwan <phil@clusterfs.com>
  11  *   Author: Mike Shaver <shaver@clusterfs.com>
  12  *   Author: Nikita Danilov <nikita@clusterfs.com>
  13  *   Author: Huang Hua <huanghua@clusterfs.com>
  14  *
  15  *
  16  *   This file is part of the Lustre file system, http://www.lustre.org
  17  *   Lustre is a trademark of Cluster File Systems, Inc.
  18  *
  19  *   You may have signed or agreed to another license before downloading
  20  *   this software.  If so, you are bound by the terms and conditions
  21  *   of that agreement, and the following does not apply to you.  See the
  22  *   LICENSE file included with this distribution for more information.
  23  *
  24  *   If you did not agree to a different license, then this copy of Lustre
  25  *   is open source software; you can redistribute it and/or modify it
  26  *   under the terms of version 2 of the GNU General Public License as
  27  *   published by the Free Software Foundation.
  28  *
  29  *   In either case, Lustre is distributed in the hope that it will be
  30  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  31  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  *   license text for more details.
  33  */
  34
  35
  36 #ifndef EXPORT_SYMTAB
  37 # define EXPORT_SYMTAB
  38 #endif
  39 #define DEBUG_SUBSYSTEM S_MDS
  40
  41 #include "mdt_internal.h"
  42
  43
  44 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
  45 void mdt_dump_lmm(int level, struct lov_mds_md *lmm)
  46 {
  47         struct lov_ost_data_v1 *lod;
  48         int i;
  49         __s16 stripe_count =
  50                 le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
  51
  52         CDEBUG_EX(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
  53                le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
  54                le32_to_cpu(lmm->lmm_pattern));
  55         CDEBUG_EX(level,"stripe_size=0x%x, stripe_count=0x%x\n",
  56                le32_to_cpu(lmm->lmm_stripe_size),
  57                le32_to_cpu(lmm->lmm_stripe_count));
  58         LASSERT(stripe_count < (__s16)LOV_MAX_STRIPE_COUNT);
  59         for (i = 0, lod = lmm->lmm_objects; i < stripe_count; i++, lod++) {
  60                 CDEBUG_EX(level, "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
  61                        i, le32_to_cpu(lod->l_ost_idx),
  62                        le64_to_cpu(lod->l_object_gr),
  63                        le64_to_cpu(lod->l_object_id));
  64         }
  65 }
  66
  67 void mdt_shrink_reply(struct mdt_thread_info *info, int offset)
  68 {
  69         struct ptlrpc_request *req = mdt_info_req(info);
  70         struct mdt_body *body;
  71         int acl_size = 0;
  72         int md_size = 0;
  73
  74         body = req_capsule_server_get(&info->mti_pill, &RMF_MDT_BODY);
  75         LASSERT(body != NULL);
  76
  77         md_size = body->eadatasize;
  78         acl_size = body->aclsize;
  79
  80         CDEBUG(D_INFO, "Shrink to md_size %d cookie_size %d \n",
  81                        md_size, acl_size);
  82
  83         lustre_shrink_reply(req, offset, md_size, 1);
  84         lustre_shrink_reply(req, md_size? offset + 1: offset, acl_size, 0);
  85 }
  86
  87
  88 /* if object is dying, pack the lov/llog data,
  89  * parameter info->mti_attr should be valid at this point! */
  90 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
  91                            const struct md_attr *ma)
  92 {
  93         struct mdt_body       *repbody;
  94         const struct lu_attr *la = &ma->ma_attr;
  95         ENTRY;
  96
  97         repbody = req_capsule_server_get(&info->mti_pill, &RMF_MDT_BODY);
  98
  99         if (ma->ma_valid & MA_INODE)
 100                 mdt_pack_attr2body(repbody, la, mdt_object_fid(mo));
 101
 102         if (ma->ma_valid & MA_LOV) {
 103                 __u32 mode;
 104
 105                 mode = lu_object_attr(info->mti_ctxt, &mo->mot_obj.mo_lu);
 106                 LASSERT(ma->ma_lmm_size);
 107                 mdt_dump_lmm(D_INFO, ma->ma_lmm);
 108                 repbody->eadatasize = ma->ma_lmm_size;
 109                 if (S_ISREG(mode))
 110                         repbody->valid |= OBD_MD_FLEASIZE;
 111                 else if (S_ISDIR(mode))
 112                         repbody->valid |= OBD_MD_FLDIREA;
 113                 else
 114                         LBUG();
 115         }
 116
 117         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE))
 118                 repbody->valid |= OBD_MD_FLCOOKIE;
 119
 120         RETURN(0);
 121 }
 122
 123 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 124                                   struct md_attr *ma, __u32 attr_flags)
 125 {
 126         __u64 out;
 127
 128         out = 0;
 129         if (in & ATTR_MODE)
 130                 out |= LA_MODE;
 131         if (in & ATTR_UID)
 132                 out |= LA_UID;
 133         if (in & ATTR_GID)
 134                 out |= LA_GID;
 135         if (in & ATTR_SIZE)
 136                 out |= LA_SIZE;
 137
 138         if (in & ATTR_FROM_OPEN)
 139                 rr->rr_flags |= MRF_SETATTR_LOCKED;
 140
 141         if (in & ATTR_ATIME_SET)
 142                 out |= LA_ATIME;
 143
 144         if (in & ATTR_CTIME_SET)
 145                 out |= LA_CTIME;
 146
 147         if (in & ATTR_MTIME_SET)
 148                 out |= LA_MTIME;
 149
 150         if (in & ATTR_ATTR_FLAG) {
 151                 ma->ma_valid |= MA_FLAGS;
 152                 ma->ma_attr_flags = attr_flags;
 153         }
 154         /*XXX need ATTR_RAW?*/
 155         in &= ~(ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|
 156                 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME|ATTR_FROM_OPEN|
 157                 ATTR_ATIME_SET|ATTR_CTIME_SET|ATTR_MTIME_SET|
 158                 ATTR_ATTR_FLAG|ATTR_RAW);
 159         if (in != 0)
 160                 CERROR("Unknown attr bits: %#llx\n", in);
 161         return out;
 162 }
 163 /* unpacking */
 164 static int mdt_setattr_unpack(struct mdt_thread_info *info)
 165 {
 166         struct mdt_rec_setattr  *rec;
 167         struct md_attr          *ma = &info->mti_attr;
 168         struct lu_attr          *la = &ma->ma_attr;
 169         struct mdt_reint_record *rr = &info->mti_rr;
 170         struct req_capsule      *pill = &info->mti_pill;
 171         ENTRY;
 172
 173         rec = req_capsule_client_get(pill, &RMF_REC_SETATTR);
 174
 175         if (rec == NULL)
 176                 RETURN(-EFAULT);
 177
 178         rr->rr_fid1 = &rec->sa_fid;
 179         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma,
 180                                             rec->sa_attr_flags);
 181         la->la_mode  = rec->sa_mode;
 182         la->la_uid   = rec->sa_uid;
 183         la->la_gid   = rec->sa_gid;
 184         la->la_size  = rec->sa_size;
 185         la->la_ctime = rec->sa_ctime;
 186         la->la_atime = rec->sa_atime;
 187         la->la_mtime = rec->sa_mtime;
 188         ma->ma_valid = MA_INODE;
 189
 190         if (req_capsule_field_present(pill, &RMF_EADATA)) {
 191                 ma->ma_lmm = req_capsule_client_get(pill, &RMF_EADATA);
 192                 ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_EADATA,
 193                                                        RCL_CLIENT);
 194                 ma->ma_valid |= MA_LOV;
 195         }
 196         if (req_capsule_field_present(pill, &RMF_LOGCOOKIES)) {
 197                 ma->ma_cookie = req_capsule_client_get(pill,
 198                                                        &RMF_LOGCOOKIES);
 199                 ma->ma_cookie_size = req_capsule_get_size(pill,
 200                                                           &RMF_LOGCOOKIES,
 201                                                           RCL_CLIENT);
 202                 ma->ma_valid |= MA_COOKIE;
 203         }
 204
 205         RETURN(0);
 206 }
 207
 208 static int mdt_create_unpack(struct mdt_thread_info *info)
 209 {
 210         struct mdt_rec_create   *rec;
 211         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 212         struct mdt_reint_record *rr = &info->mti_rr;
 213         struct req_capsule      *pill = &info->mti_pill;
 214         int                     result = 0;
 215         ENTRY;
 216
 217         rec = req_capsule_client_get(pill, &RMF_REC_CREATE);
 218         if (rec != NULL) {
 219                 rr->rr_fid1 = &rec->cr_fid1;
 220                 rr->rr_fid2 = &rec->cr_fid2;
 221                 attr->la_mode = rec->cr_mode;
 222                 attr->la_rdev  = rec->cr_rdev;
 223                 attr->la_uid   = rec->cr_fsuid;
 224                 attr->la_gid   = rec->cr_fsgid;
 225                 attr->la_ctime = rec->cr_time;
 226                 attr->la_mtime = rec->cr_time;
 227                 attr->la_atime = rec->cr_time;
 228                 attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID |
 229                                  LA_CTIME | LA_MTIME | LA_ATIME;
 230                 info->mti_spec.sp_cr_flags = rec->cr_flags;
 231
 232                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 233                 if (rr->rr_name) {
 234                         if (req_capsule_field_present(pill, &RMF_SYMTGT)) {
 235                                 const char *tgt;
 236                                 tgt = req_capsule_client_get(pill,
 237                                                              &RMF_SYMTGT);
 238                                 if (tgt == NULL)
 239                                         result = -EFAULT;
 240                                 info->mti_spec.u.sp_symname = tgt;
 241                         }
 242                 } else
 243                         result = -EFAULT;
 244         } else
 245                 result = -EFAULT;
 246         RETURN(result);
 247 }
 248
 249 static int mdt_link_unpack(struct mdt_thread_info *info)
 250 {
 251         struct mdt_rec_link     *rec;
 252         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 253         struct mdt_reint_record *rr = &info->mti_rr;
 254         struct req_capsule      *pill = &info->mti_pill;
 255         int                      result = 0;
 256         ENTRY;
 257
 258         rec = req_capsule_client_get(pill, &RMF_REC_LINK);
 259         if (rec != NULL) {
 260                 attr->la_uid = rec->lk_fsuid;
 261                 attr->la_gid = rec->lk_fsgid;
 262                 rr->rr_fid1 = &rec->lk_fid1;
 263                 rr->rr_fid2 = &rec->lk_fid2;
 264                 attr->la_ctime = rec->lk_time;
 265                 attr->la_mtime = rec->lk_time;
 266                 attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
 267                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 268                 if (rr->rr_name == NULL)
 269                         result = -EFAULT;
 270         } else
 271                 result = -EFAULT;
 272         RETURN(result);
 273 }
 274
 275 static int mdt_unlink_unpack(struct mdt_thread_info *info)
 276 {
 277         struct mdt_rec_unlink   *rec;
 278         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 279         struct mdt_reint_record *rr = &info->mti_rr;
 280         struct req_capsule      *pill = &info->mti_pill;
 281         int                      result = 0;
 282         ENTRY;
 283
 284         rec = req_capsule_client_get(pill, &RMF_REC_UNLINK);
 285         if (rec != NULL) {
 286                 attr->la_uid = rec->ul_fsuid;
 287                 attr->la_gid = rec->ul_fsgid;
 288                 rr->rr_fid1 = &rec->ul_fid1;
 289                 rr->rr_fid2 = &rec->ul_fid2;
 290                 attr->la_ctime = rec->ul_time;
 291                 attr->la_mtime = rec->ul_time;
 292                 attr->la_mode  = rec->ul_mode;
 293
 294                 attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
 295                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 296                 if (rr->rr_name == NULL)
 297                         result = -EFAULT;
 298         } else
 299                 result = -EFAULT;
 300         RETURN(result);
 301 }
 302
 303 static int mdt_rename_unpack(struct mdt_thread_info *info)
 304 {
 305         struct mdt_rec_rename   *rec;
 306         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 307         struct mdt_reint_record *rr = &info->mti_rr;
 308         struct req_capsule      *pill = &info->mti_pill;
 309         int                      result = 0;
 310         ENTRY;
 311
 312         rec = req_capsule_client_get(pill, &RMF_REC_RENAME);
 313         if (rec != NULL) {
 314                 attr->la_uid = rec->rn_fsuid;
 315                 attr->la_gid = rec->rn_fsgid;
 316                 rr->rr_fid1 = &rec->rn_fid1;
 317                 rr->rr_fid2 = &rec->rn_fid2;
 318                 attr->la_ctime = rec->rn_time;
 319                 attr->la_mtime = rec->rn_time;
 320                 attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
 321                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 322                 rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
 323                 if (rr->rr_name == NULL || rr->rr_tgt == NULL)
 324                         result = -EFAULT;
 325         } else
 326                 result = -EFAULT;
 327         RETURN(result);
 328 }
 329
 330 static int mdt_open_unpack(struct mdt_thread_info *info)
 331 {
 332         struct mdt_rec_create   *rec;
 333         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 334         struct req_capsule      *pill = &info->mti_pill;
 335         struct mdt_reint_record *rr   = &info->mti_rr;
 336         int                     result;
 337         ENTRY;
 338
 339         rec = req_capsule_client_get(pill, &RMF_REC_CREATE);
 340         if (rec != NULL) {
 341                 rr->rr_fid1   = &rec->cr_fid1;
 342                 rr->rr_fid2   = &rec->cr_fid2;
 343                 attr->la_mode = rec->cr_mode;
 344                 attr->la_rdev  = rec->cr_rdev;
 345                 attr->la_uid   = rec->cr_fsuid;
 346                 attr->la_gid   = rec->cr_fsgid;
 347                 attr->la_ctime = rec->cr_time;
 348                 attr->la_mtime = rec->cr_time;
 349                 attr->la_atime = rec->cr_time;
 350                 attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_CTIME
 351                                  | LA_MTIME | LA_ATIME;
 352                 info->mti_spec.sp_cr_flags = rec->cr_flags;
 353                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 354                 if (rr->rr_name == NULL)
 355                         /*XXX: what about open by FID? */
 356                         result = -EFAULT;
 357                 else
 358                         result = 0;
 359         } else
 360                 result = -EFAULT;
 361
 362         if (req_capsule_field_present(pill, &RMF_EADATA)) {
 363                 struct md_create_spec *sp = &info->mti_spec;
 364                 sp->u.sp_ea.eadata = req_capsule_client_get(pill,
 365                                                             &RMF_EADATA);
 366                 sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
 367                                                              &RMF_EADATA,
 368                                                              RCL_CLIENT);
 369         }
 370
 371         RETURN(result);
 372 }
 373
 374 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
 375
 376 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
 377         [REINT_SETATTR]  = mdt_setattr_unpack,
 378         [REINT_CREATE]   = mdt_create_unpack,
 379         [REINT_LINK]     = mdt_link_unpack,
 380         [REINT_UNLINK]   = mdt_unlink_unpack,
 381         [REINT_RENAME]   = mdt_rename_unpack,
 382         [REINT_OPEN]     = mdt_open_unpack
 383 };
 384
 385 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
 386 {
 387         int rc;
 388
 389         ENTRY;
 390
 391         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
 392                 info->mti_rr.rr_opcode = op;
 393                 rc = mdt_reint_unpackers[op](info);
 394         } else {
 395                 CERROR("Unexpected opcode %d\n", op);
 396                 rc = -EFAULT;
 397         }
 398         RETURN(rc);
 399 }