lustre/utils/lhsmtool_posix.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.gnu.org/licenses/gpl-2.0.htm
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * (C) Copyright 2012 Commissariat a l'energie atomique et aux energies
  24  *     alternatives
  25  *
  26  */
  27 /* HSM copytool program for POSIX filesystem-based HSM's.
  28  *
  29  * An HSM copytool daemon acts on action requests from Lustre to copy files
  30  * to and from an HSM archive system. This one in particular makes regular
  31  * POSIX filesystem calls to a given path, where an HSM is presumably mounted.
  32  *
  33  * This particular tool can also import an existing HSM archive.
  34  */
  35 #include <stdint.h>
  36 #include <stdlib.h>
  37 #include <dirent.h>
  38 #include <errno.h>
  39 #include <utime.h>
  40 #include <sys/xattr.h>
  41 #include <sys/syscall.h>
  42 #include <sys/types.h>
  43 #include <lustre/lustre_idl.h>
  44 #include <lustre/lustreapi.h>
  45
  46 /* Progress reporting period */
  47 #define REPORT_INTERVAL_DEFAULT 30
  48 /* HSM hash subdir permissions */
  49 #define DIR_PERM S_IRWXU
  50 /* HSM hash file permissions */
  51 #define FILE_PERM (S_IRUSR | S_IWUSR)
  52
  53 #define ONE_MB 0x100000
  54
  55 /* copytool uses a 32b bitmask field to register with kuc
  56  * archive num = 0 => all
  57  * archive num from 1 to 32
  58  */
  59 #define MAX_ARCHIVE_CNT (sizeof(__u32) * 8)
  60
  61 enum ct_action {
  62         CA_IMPORT = 1,
  63         CA_REBIND,
  64         CA_MAXSEQ,
  65 };
  66
  67 struct options {
  68         int                      o_copy_attrs;
  69         int                      o_daemonize;
  70         int                      o_dry_run;
  71         int                      o_abort_on_error;
  72         int                      o_shadow_tree;
  73         int                      o_verbose;
  74         int                      o_copy_xattrs;
  75         int                      o_archive_cnt;
  76         int                      o_archive_id[MAX_ARCHIVE_CNT];
  77         int                      o_report_int;
  78         unsigned long long       o_bandwidth;
  79         size_t                   o_chunk_size;
  80         enum ct_action           o_action;
  81         char                    *o_mnt;
  82         char                    *o_hsm_root;
  83         char                    *o_src; /* for import, or rebind */
  84         char                    *o_dst; /* for import, or rebind */
  85 };
  86
  87 /* everything else is zeroed */
  88 struct options opt = {
  89         .o_copy_attrs = 1,
  90         .o_shadow_tree = 1,
  91         .o_verbose = LLAPI_MSG_INFO,
  92         .o_copy_xattrs = 1,
  93         .o_report_int = REPORT_INTERVAL_DEFAULT,
  94         .o_chunk_size = ONE_MB,
  95 };
  96
  97 /* hsm_copytool_private will hold an open FD on the lustre mount point
  98  * for us. Additionally open one on the archive FS root to make sure
  99  * it doesn't drop out from under us (and remind the admin to shutdown
 100  * the copytool before unmounting). */
 101
 102 static int arc_fd = -1;
 103
 104 static int err_major;
 105 static int err_minor;
 106
 107 static char cmd_name[PATH_MAX];
 108 static char fs_name[MAX_OBD_NAME + 1];
 109
 110 static struct hsm_copytool_private *ctdata;
 111
 112
 113 #define CT_ERROR(_rc, _format, ...) \
 114         llapi_error(LLAPI_MSG_ERROR, _rc,                               \
 115                     "%s[%ld]: "_format,                                 \
 116                     cmd_name, syscall(SYS_gettid), ## __VA_ARGS__)
 117 #define CT_DEBUG(_format, ...) \
 118         llapi_error(LLAPI_MSG_DEBUG | LLAPI_MSG_NO_ERRNO, 0,            \
 119                     "%s[%ld]: "_format,                                 \
 120                     cmd_name, syscall(SYS_gettid), ## __VA_ARGS__)
 121 #define CT_WARN(_format, ...) \
 122         llapi_error(LLAPI_MSG_WARN | LLAPI_MSG_NO_ERRNO, 0,             \
 123                     "%s[%ld]: "_format,                                 \
 124                     cmd_name, syscall(SYS_gettid), ## __VA_ARGS__)
 125 #define CT_TRACE(_format, ...) \
 126         llapi_error(LLAPI_MSG_INFO | LLAPI_MSG_NO_ERRNO, 0,             \
 127                     "%s[%ld]: "_format,                                 \
 128                     cmd_name, syscall(SYS_gettid), ## __VA_ARGS__)
 129 #define CT_PRINTF(_format, ...) \
 130         llapi_printf(LLAPI_MSG_NORMAL,                                  \
 131                      "%s[%ld]: "_format,                                \
 132                      cmd_name, syscall(SYS_gettid), ## __VA_ARGS__)
 133
 134 static void usage(const char *name, int rc)
 135 {
 136         fprintf(stdout,
 137         " Usage: %s [options]... <mode> <lustre_mount_point>\n"
 138         "The Lustre HSM Posix copy tool can be used as a daemon or "
 139         "as a command line tool\n"
 140         "The Lustre HSM daemon acts on action requests from Lustre\n"
 141         "to copy files to and from an HSM archive system.\n"
 142         "This POSIX-flavored daemon makes regular POSIX filesystem calls\n"
 143         "to an HSM mounted at a given hsm_root.\n"
 144         "   --daemon            Daemon mode, run in background\n"
 145         " Options:\n"
 146         "   --no-attr           Don't copy file attributes\n"
 147         "   --no-shadow         Don't create shadow namespace in archive\n"
 148         "   --no-xattr          Don't copy file extended attributes\n"
 149         "The Lustre HSM tool performs administrator-type actions\n"
 150         "on a Lustre HSM archive.\n"
 151         "This POSIX-flavored tool can link an existing HSM namespace\n"
 152         "into a Lustre filesystem.\n"
 153         " Usage:\n"
 154         "   %s [options] --import <src> <dst> <lustre_mount_point>\n"
 155         "      import an archived subtree at\n"
 156         "       <src> (relative to hsm_root) into the Lustre filesystem at\n"
 157         "       <dst> (absolute)\n"
 158         "   %s [options] --rebind <old_FID> <new_FID> <lustre_mount_point>\n"
 159         "      rebind an entry in the HSM to a new FID\n"
 160         "       <old_FID> old FID the HSM entry is bound to\n"
 161         "       <new_FID> new FID to bind the HSM entry to\n"
 162         "   %s [options] --rebind <list_file> <lustre_mount_point>\n"
 163         "      perform the rebind operation for all FID in the list file\n"
 164         "       each line of <list_file> consists of <old_FID> <new_FID>\n"
 165         "   %s [options] --max-sequence <fsname>\n"
 166         "       return the max fid sequence of archived files\n"
 167         "   -A, --archive <#>        Archive number (repeatable)\n"
 168         "   -p, --hsm-root <path>    Target HSM mount point\n"
 169         "   -q, --quiet              Produce less verbose output\n"
 170         "   -v, --verbose            Produce more verbose output\n"
 171         "   -c, --chunk-size <sz>    I/O size used during data copy\n"
 172         "                            (unit can be used, default is MB)\n"
 173         "   --abort-on-error         Abort operation on major error\n"
 174         "   --dry-run                Don't run, just show what would be done\n"
 175         "   --bandwidth <bw>         Limit I/O bandwidth (unit can be used\n,"
 176         "                            default is MB)\n",
 177         cmd_name, cmd_name, cmd_name, cmd_name, cmd_name);
 178
 179         exit(rc);
 180 }
 181
 182 static int ct_parseopts(int argc, char * const *argv)
 183 {
 184         struct option long_opts[] = {
 185                 {"abort-on-error", no_argument,       &opt.o_abort_on_error, 1},
 186                 {"abort_on_error", no_argument,       &opt.o_abort_on_error, 1},
 187                 {"archive",        required_argument, NULL,                'A'},
 188                 {"bandwidth",      required_argument, NULL,                'b'},
 189                 {"chunk-size",     required_argument, NULL,                'c'},
 190                 {"chunk_size",     required_argument, NULL,                'c'},
 191                 {"daemon",         no_argument,       &opt.o_daemonize,     1},
 192                 {"dry-run",        no_argument,       &opt.o_dry_run,       1},
 193                 {"help",           no_argument,       NULL,                'h'},
 194                 {"hsm-root",       required_argument, NULL,                'p'},
 195                 {"hsm_root",       required_argument, NULL,                'p'},
 196                 {"import",         no_argument,       NULL,                'i'},
 197                 {"max-sequence",   no_argument,       NULL,                'M'},
 198                 {"max_sequence",   no_argument,       NULL,                'M'},
 199                 {"no-attr",        no_argument,       &opt.o_copy_attrs,    0},
 200                 {"no_attr",        no_argument,       &opt.o_copy_attrs,    0},
 201                 {"no-shadow",      no_argument,       &opt.o_shadow_tree,   0},
 202                 {"no_shadow",      no_argument,       &opt.o_shadow_tree,   0},
 203                 {"no-xattr",       no_argument,       &opt.o_copy_xattrs,   0},
 204                 {"no_xattr",       no_argument,       &opt.o_copy_xattrs,   0},
 205                 {"quiet",          no_argument,       NULL,                'q'},
 206                 {"rebind",         no_argument,       NULL,                'r'},
 207                 {"report",         required_argument, &opt.o_report_int,    0},
 208                 {"verbose",        no_argument,       NULL,                'v'},
 209                 {0, 0, 0, 0}
 210         };
 211         int                      c, rc;
 212         unsigned long long       value;
 213         unsigned long long       unit;
 214
 215         optind = 0;
 216         while ((c = getopt_long(argc, argv, "A:b:c:hiMp:qrv",
 217                                 long_opts, NULL)) != -1) {
 218                 switch (c) {
 219                 case 'A':
 220                         if ((opt.o_archive_cnt >= MAX_ARCHIVE_CNT) ||
 221                             (atoi(optarg) >= MAX_ARCHIVE_CNT)) {
 222                                 rc = -E2BIG;
 223                                 CT_ERROR(rc, "archive number must be less"
 224                                          "than %zu", MAX_ARCHIVE_CNT);
 225                                 return rc;
 226                         }
 227                         opt.o_archive_id[opt.o_archive_cnt] = atoi(optarg);
 228                         opt.o_archive_cnt++;
 229                         break;
 230                 case 'b': /* -b and -c have both a number with unit as arg */
 231                 case 'c':
 232                         unit = ONE_MB;
 233                         if (llapi_parse_size(optarg, &value, &unit, 0) < 0) {
 234                                 rc = -EINVAL;
 235                                 CT_ERROR(rc, "bad value for -%c '%s'", c,
 236                                          optarg);
 237                                 return rc;
 238                         }
 239                         if (c == 'c')
 240                                 opt.o_chunk_size = value;
 241                         else
 242                                 opt.o_bandwidth = value;
 243                         break;
 244                 case 'h':
 245                         usage(argv[0], 0);
 246                 case 'i':
 247                         opt.o_action = CA_IMPORT;
 248                         break;
 249                 case 'M':
 250                         opt.o_action = CA_MAXSEQ;
 251                         break;
 252                 case 'p':
 253                         opt.o_hsm_root = optarg;
 254                         break;
 255                 case 'q':
 256                         opt.o_verbose--;
 257                         break;
 258                 case 'r':
 259                         opt.o_action = CA_REBIND;
 260                         break;
 261                 case 'v':
 262                         opt.o_verbose++;
 263                         break;
 264                 case 0:
 265                         break;
 266                 default:
 267                         return -EINVAL;
 268                 }
 269         }
 270
 271         switch (opt.o_action) {
 272         case CA_IMPORT:
 273                 /* src dst mount_point */
 274                 if (argc != optind + 3) {
 275                         rc = -EINVAL;
 276                         CT_ERROR(rc, "--import requires 2 arguments");
 277                         return rc;
 278                 }
 279                 opt.o_src = argv[optind++];
 280                 opt.o_dst = argv[optind++];
 281                 break;
 282         case CA_REBIND:
 283                 /* FID1 FID2 mount_point or FILE mount_point */
 284                 if (argc == optind + 2) {
 285                         opt.o_src = argv[optind++];
 286                         opt.o_dst = NULL;
 287                 } else if (argc == optind + 3) {
 288                         opt.o_src = argv[optind++];
 289                         opt.o_dst = argv[optind++];
 290                 } else {
 291                         rc = -EINVAL;
 292                         CT_ERROR(rc, "--rebind requires 1 or 2 arguments");
 293                         return rc;
 294                 }
 295                 break;
 296         case CA_MAXSEQ:
 297         default:
 298                 /* just mount point */
 299                 break;
 300         }
 301
 302         if (argc != optind + 1) {
 303                 rc = -EINVAL;
 304                 CT_ERROR(rc, "no mount point specified");
 305                 return rc;
 306         }
 307
 308         opt.o_mnt = argv[optind];
 309
 310         CT_TRACE("action=%d src=%s dst=%s mount_point=%s",
 311                  opt.o_action, opt.o_src, opt.o_dst, opt.o_mnt);
 312
 313         if (!opt.o_dry_run && opt.o_hsm_root == NULL) {
 314                 rc = -EINVAL;
 315                 CT_ERROR(rc, "must specify a root directory for the backend");
 316                 return rc;
 317         }
 318
 319         if (opt.o_action == CA_IMPORT) {
 320                 if (opt.o_src && opt.o_src[0] == '/') {
 321                         rc = -EINVAL;
 322                         CT_ERROR(rc,
 323                                  "source path must be relative to HSM root");
 324                         return rc;
 325                 }
 326
 327                 if (opt.o_dst && opt.o_dst[0] != '/') {
 328                         rc = -EINVAL;
 329                         CT_ERROR(rc, "destination path must be absolute");
 330                         return rc;
 331                 }
 332         }
 333
 334         return 0;
 335 }
 336
 337 /* mkdir -p path */
 338 static int ct_mkdir_p(const char *path)
 339 {
 340         char    *saved, *ptr;
 341         int      rc;
 342
 343         ptr = strdup(path);
 344         saved = ptr;
 345         while (*ptr == '/')
 346                 ptr++;
 347
 348         while ((ptr = strchr(ptr, '/')) != NULL) {
 349                 *ptr = '\0';
 350                 rc = mkdir(saved, DIR_PERM);
 351                 *ptr = '/';
 352                 if (rc < 0 && errno != EEXIST) {
 353                         rc = -errno;
 354                         CT_ERROR(rc, "cannot mkdir '%s'", path);
 355                         free(saved);
 356                         return rc;
 357                 }
 358                 ptr++;
 359         }
 360
 361         free(saved);
 362
 363         return 0;
 364 }
 365
 366 static int ct_save_stripe(int src_fd, const char *src, const char *dst)
 367 {
 368         char                     lov_file[PATH_MAX];
 369         char                     lov_buf[XATTR_SIZE_MAX];
 370         struct lov_user_md      *lum;
 371         int                      rc;
 372         int                      fd;
 373         ssize_t                  xattr_size;
 374
 375         snprintf(lov_file, sizeof(lov_file), "%s.lov", dst);
 376         CT_TRACE("saving stripe info of '%s' in %s", src, lov_file);
 377
 378         xattr_size = fgetxattr(src_fd, XATTR_LUSTRE_LOV, lov_buf,
 379                                sizeof(lov_buf));
 380         if (xattr_size < 0) {
 381                 rc = -errno;
 382                 CT_ERROR(rc, "cannot get stripe info on '%s'", src);
 383                 return rc;
 384         }
 385
 386         lum = (struct lov_user_md *)lov_buf;
 387
 388         if (lum->lmm_magic == LOV_USER_MAGIC_V1 ||
 389             lum->lmm_magic == LOV_USER_MAGIC_V3) {
 390                 /* Set stripe_offset to -1 so that it is not interpreted as a
 391                  * hint on restore. */
 392                 lum->lmm_stripe_offset = -1;
 393         }
 394
 395         fd = open(lov_file, O_TRUNC | O_CREAT | O_WRONLY, FILE_PERM);
 396         if (fd < 0) {
 397                 rc = -errno;
 398                 CT_ERROR(rc, "cannot open '%s'", lov_file);
 399                 goto err_cleanup;
 400         }
 401
 402         rc = write(fd, lum, xattr_size);
 403         if (rc < 0) {
 404                 rc = -errno;
 405                 CT_ERROR(rc, "cannot write %zd bytes to '%s'",
 406                          xattr_size, lov_file);
 407                 close(fd);
 408                 goto err_cleanup;
 409         }
 410
 411         rc = close(fd);
 412         if (rc < 0) {
 413                 rc = -errno;
 414                 CT_ERROR(rc, "cannot close '%s'", lov_file);
 415                 goto err_cleanup;
 416         }
 417
 418         return 0;
 419
 420 err_cleanup:
 421         unlink(lov_file);
 422
 423         return rc;
 424 }
 425
 426 static int ct_load_stripe(const char *src, void *lovea, size_t *lovea_size)
 427 {
 428         char     lov_file[PATH_MAX];
 429         int      rc;
 430         int      fd;
 431
 432         snprintf(lov_file, sizeof(lov_file), "%s.lov", src);
 433         CT_TRACE("reading stripe rules from '%s' for '%s'", lov_file, src);
 434
 435         fd = open(lov_file, O_RDONLY);
 436         if (fd < 0) {
 437                 CT_ERROR(errno, "cannot open '%s'", lov_file);
 438                 return -ENODATA;
 439         }
 440
 441         rc = read(fd, lovea, *lovea_size);
 442         if (rc < 0) {
 443                 CT_ERROR(errno, "cannot read %zu bytes from '%s'",
 444                          *lovea_size, lov_file);
 445                 close(fd);
 446                 return -ENODATA;
 447         }
 448
 449         *lovea_size = rc;
 450         close(fd);
 451
 452         return 0;
 453 }
 454
 455 static int ct_restore_stripe(const char *src, const char *dst, int dst_fd,
 456                              const void *lovea, size_t lovea_size)
 457 {
 458         int     rc;
 459
 460         rc = fsetxattr(dst_fd, XATTR_LUSTRE_LOV, lovea, lovea_size,
 461                        XATTR_CREATE);
 462         if (rc < 0) {
 463                 CT_ERROR(errno, "cannot set lov EA on '%s'", dst);
 464                 rc = -errno;
 465         }
 466
 467         return rc;
 468 }
 469
 470 static void bandwidth_ctl_delay(int wsize)
 471 {
 472         static unsigned long long       tot_bytes;
 473         static time_t                   start_time;
 474         static time_t                   last_time;
 475         time_t                          now = time(0);
 476         double                          tot_time;
 477         double                          excess;
 478         unsigned int                    sleep_time;
 479
 480         if (now > last_time + 5) {
 481                 tot_bytes = 0;
 482                 start_time = last_time = now;
 483         }
 484
 485         tot_bytes += wsize;
 486         tot_time = now - start_time;
 487         if (tot_time < 1)
 488                 tot_time = 1;
 489
 490         excess = tot_bytes - tot_time * opt.o_bandwidth;
 491         sleep_time = excess * 1000000 / opt.o_bandwidth;
 492         if ((now - start_time) % 10 == 1)
 493                 CT_TRACE("bandwith control: excess=%E sleep for %dus", excess,
 494                          sleep_time);
 495
 496         if (excess > 0)
 497                 usleep(sleep_time);
 498
 499         last_time = now;
 500 }
 501
 502 static int ct_copy_data(struct hsm_copyaction_private *hcp, const char *src,
 503                         const char *dst, int src_fd, int dst_fd,
 504                         const struct hsm_action_item *hai, long hal_flags)
 505 {
 506         struct hsm_extent        he;
 507         __u64                    offset = hai->hai_extent.offset;
 508         struct stat              src_st;
 509         struct stat              dst_st;
 510         char                    *buf;
 511         __u64                    write_total = 0;
 512         __u64                    length;
 513         time_t                   last_print_time = time(NULL);
 514         int                      rc = 0;
 515
 516         CT_TRACE("going to copy data from '%s' to '%s'", src, dst);
 517
 518         buf = malloc(opt.o_chunk_size);
 519         if (buf == NULL)
 520                 return -ENOMEM;
 521
 522         if (fstat(src_fd, &src_st) < 0) {
 523                 rc = -errno;
 524                 CT_ERROR(rc, "cannot stat '%s'", src);
 525                 return rc;
 526         }
 527
 528         if (!S_ISREG(src_st.st_mode)) {
 529                 rc = -EINVAL;
 530                 CT_ERROR(rc, "'%s' is not a regular file", src);
 531                 return rc;
 532         }
 533
 534         if (fstat(dst_fd, &dst_st) < 0) {
 535                 rc = -errno;
 536                 CT_ERROR(rc, "cannot stat '%s'", dst);
 537                 return rc;
 538         }
 539
 540         if (!S_ISREG(dst_st.st_mode)) {
 541                 rc = -EINVAL;
 542                 CT_ERROR(rc, "'%s' is not a regular file", dst);
 543                 return rc;
 544         }
 545
 546         rc = lseek(src_fd, hai->hai_extent.offset, SEEK_SET);
 547         if (rc < 0) {
 548                 CT_ERROR(errno,
 549                          "cannot seek for read to "LPU64" (len %jd) in '%s'",
 550                          hai->hai_extent.offset, (intmax_t)src_st.st_size, src);
 551                 rc = -errno;
 552                 goto out;
 553         }
 554
 555         he.offset = offset;
 556         he.length = 0;
 557         rc = llapi_hsm_action_progress(hcp, &he, 0);
 558         if (rc < 0) {
 559                 /* Action has been canceled or something wrong
 560                  * is happening. Stop copying data. */
 561                 CT_ERROR(rc, "progress ioctl for copy '%s'->'%s' failed",
 562                          src, dst);
 563                 goto out;
 564         }
 565
 566         errno = 0;
 567         /* Don't read beyond a given extent */
 568         length = min(hai->hai_extent.length, src_st.st_size);
 569
 570         CT_DEBUG("Going to copy "LPU64" bytes %s -> %s\n", length, src, dst);
 571
 572         while (write_total < length) {
 573                 ssize_t rsize;
 574                 ssize_t wsize;
 575                 int     chunk = (length - write_total > opt.o_chunk_size) ?
 576                                  opt.o_chunk_size : length - write_total;
 577
 578                 rsize = pread(src_fd, buf, chunk, offset);
 579                 if (rsize == 0)
 580                         /* EOF */
 581                         break;
 582
 583                 if (rsize < 0) {
 584                         rc = -errno;
 585                         CT_ERROR(rc, "cannot read from '%s'", src);
 586                         break;
 587                 }
 588
 589                 wsize = pwrite(dst_fd, buf, rsize, offset);
 590                 if (wsize < 0) {
 591                         rc = -errno;
 592                         CT_ERROR(rc, "cannot write to '%s'", dst);
 593                         break;
 594                 }
 595
 596                 write_total += wsize;
 597                 offset += wsize;
 598
 599                 if (opt.o_bandwidth != 0)
 600                         /* sleep if needed, to honor bandwidth limits */
 601                         bandwidth_ctl_delay(wsize);
 602
 603                 if (time(0) >= last_print_time + opt.o_report_int) {
 604                         last_print_time = time(0);
 605                         CT_TRACE("%%"LPU64" ", 100 * write_total / length);
 606                         he.length = write_total;
 607                         rc = llapi_hsm_action_progress(hcp, &he, 0);
 608                         if (rc < 0) {
 609                                 /* Action has been canceled or something wrong
 610                                  * is happening. Stop copying data. */
 611                                 CT_ERROR(rc, "progress ioctl for copy"
 612                                          " '%s'->'%s' failed", src, dst);
 613                                 goto out;
 614                         }
 615                 }
 616                 rc = 0;
 617         }
 618
 619 out:
 620         /*
 621          * truncate restored file
 622          * size is taken from the archive this is done to support
 623          * restore after a force release which leaves the file with the
 624          * wrong size (can big bigger than the new size)
 625          */
 626         if ((hai->hai_action == HSMA_RESTORE) &&
 627             (src_st.st_size < dst_st.st_size)) {
 628                 /*
 629                  * make sure the file is on disk before reporting success.
 630                  */
 631                 rc = ftruncate(dst_fd, src_st.st_size);
 632                 if (rc < 0) {
 633                         rc = -errno;
 634                         CT_ERROR(rc,
 635                                  "cannot truncate '%s' to size %jd",
 636                                  dst, (intmax_t)src_st.st_size);
 637                         err_major++;
 638                 }
 639         }
 640
 641         free(buf);
 642
 643         return rc;
 644 }
 645
 646 /* Copy file attributes from file src to file dest */
 647 static int ct_copy_attr(const char *src, const char *dst, int src_fd,
 648                         int dst_fd)
 649 {
 650         struct stat     st;
 651         struct timeval  times[2];
 652         int             rc;
 653
 654         if (fstat(src_fd, &st) < 0) {
 655                 rc = -errno;
 656                 CT_ERROR(rc, "cannot stat '%s'", src);
 657                 return rc;
 658         }
 659
 660         times[0].tv_sec = st.st_atime;
 661         times[0].tv_usec = 0;
 662         times[1].tv_sec = st.st_mtime;
 663         times[1].tv_usec = 0;
 664         if (fchmod(dst_fd, st.st_mode) < 0 ||
 665             fchown(dst_fd, st.st_uid, st.st_gid) < 0 ||
 666             futimes(dst_fd, times) < 0) {
 667                 rc = -errno;
 668                 CT_ERROR(rc, "cannot set attributes of '%s'", src);
 669                 return rc;
 670         }
 671
 672         return 0;
 673 }
 674
 675 static int ct_copy_xattr(const char *src, const char *dst, int src_fd,
 676                          int dst_fd, bool is_restore)
 677 {
 678         char     list[XATTR_LIST_MAX];
 679         char     value[XATTR_SIZE_MAX];
 680         char    *name;
 681         ssize_t  list_len;
 682         int      rc;
 683
 684         list_len = flistxattr(src_fd, list, sizeof(list));
 685         if (list_len < 0)
 686                 return -errno;
 687
 688         name = list;
 689         while (name < list + list_len) {
 690                 rc = fgetxattr(src_fd, name, value, sizeof(value));
 691                 if (rc < 0)
 692                         return -errno;
 693
 694                 /* when we restore, we do not restore lustre xattr */
 695                 if (!is_restore ||
 696                     (strncmp(XATTR_TRUSTED_PREFIX, name,
 697                              sizeof(XATTR_TRUSTED_PREFIX) - 1) != 0)) {
 698                         rc = fsetxattr(dst_fd, name, value, rc, 0);
 699                         CT_TRACE("fsetxattr of '%s' on '%s' rc=%d (%s)",
 700                                  name, dst, rc, strerror(errno));
 701                         /* lustre.* attrs aren't supported on other FS's */
 702                         if (rc < 0 && errno != EOPNOTSUPP) {
 703                                 rc = -errno;
 704                                 CT_ERROR(rc, "cannot set extended attribute"
 705                                          " '%s' of '%s'",
 706                                          name, dst);
 707                                 return rc;
 708                         }
 709                 }
 710                 name += strlen(name) + 1;
 711         }
 712
 713         return 0;
 714 }
 715
 716 static int ct_path_lustre(char *buf, int sz, const char *mnt,
 717                           const lustre_fid *fid)
 718 {
 719         return snprintf(buf, sz, "%s/%s/fid/"DFID_NOBRACE, mnt,
 720                         dot_lustre_name, PFID(fid));
 721 }
 722
 723 static int ct_path_archive(char *buf, int sz, const char *archive_dir,
 724                            const lustre_fid *fid)
 725 {
 726         return snprintf(buf, sz, "%s/%04x/%04x/%04x/%04x/%04x/%04x/"
 727                         DFID_NOBRACE, archive_dir,
 728                         (fid)->f_oid       & 0xFFFF,
 729                         (fid)->f_oid >> 16 & 0xFFFF,
 730                         (unsigned int)((fid)->f_seq       & 0xFFFF),
 731                         (unsigned int)((fid)->f_seq >> 16 & 0xFFFF),
 732                         (unsigned int)((fid)->f_seq >> 32 & 0xFFFF),
 733                         (unsigned int)((fid)->f_seq >> 48 & 0xFFFF),
 734                         PFID(fid));
 735 }
 736
 737 static bool ct_is_retryable(int err)
 738 {
 739         return err == -ETIMEDOUT;
 740 }
 741
 742 static int ct_begin_restore(struct hsm_copyaction_private **phcp,
 743                             const struct hsm_action_item *hai,
 744                             int mdt_index, int open_flags)
 745 {
 746         char     src[PATH_MAX];
 747         int      rc;
 748
 749         rc = llapi_hsm_action_begin(phcp, ctdata, hai, mdt_index, open_flags,
 750                                     false);
 751         if (rc < 0) {
 752                 ct_path_lustre(src, sizeof(src), opt.o_mnt, &hai->hai_fid);
 753                 CT_ERROR(rc, "llapi_hsm_action_begin() on '%s' failed", src);
 754         }
 755
 756         return rc;
 757 }
 758
 759 static int ct_begin(struct hsm_copyaction_private **phcp,
 760                     const struct hsm_action_item *hai)
 761 {
 762         /* Restore takes specific parameters. Call the same function w/ default
 763          * values for all other operations. */
 764         return ct_begin_restore(phcp, hai, -1, 0);
 765 }
 766
 767 static int ct_fini(struct hsm_copyaction_private **phcp,
 768                    const struct hsm_action_item *hai, int hp_flags, int ct_rc)
 769 {
 770         char    lstr[PATH_MAX];
 771         int     rc;
 772
 773         CT_TRACE("Action completed, notifying coordinator "
 774                  "cookie="LPX64", FID="DFID", hp_flags=%d err=%d",
 775                  hai->hai_cookie, PFID(&hai->hai_fid),
 776                  hp_flags, -ct_rc);
 777
 778         ct_path_lustre(lstr, sizeof(lstr), opt.o_mnt, &hai->hai_fid);
 779         rc = llapi_hsm_action_end(phcp, &hai->hai_extent, hp_flags, abs(ct_rc));
 780         if (rc == -ECANCELED)
 781                 CT_ERROR(rc, "completed action on '%s' has been canceled: "
 782                          "cookie="LPX64", FID="DFID, lstr, hai->hai_cookie,
 783                          PFID(&hai->hai_fid));
 784         else if (rc < 0)
 785                 CT_ERROR(rc, "llapi_hsm_action_end() on '%s' failed", lstr);
 786         else
 787                 CT_TRACE("llapi_hsm_action_end() on '%s' ok (rc=%d)",
 788                          lstr, rc);
 789
 790         return rc;
 791 }
 792
 793 static int ct_archive(const struct hsm_action_item *hai, const long hal_flags)
 794 {
 795         struct hsm_copyaction_private   *hcp = NULL;
 796         char                             src[PATH_MAX];
 797         char                             dst[PATH_MAX] = "";
 798         int                              rc;
 799         int                              rcf = 0;
 800         bool                             rename_needed = false;
 801         int                              hp_flags = 0;
 802         int                              open_flags;
 803         int                              src_fd = -1;
 804         int                              dst_fd = -1;
 805
 806         rc = ct_begin(&hcp, hai);
 807         if (rc < 0)
 808                 goto fini_major;
 809
 810         /* we fill archive so:
 811          * source = data FID
 812          * destination = lustre FID
 813          */
 814         ct_path_lustre(src, sizeof(src), opt.o_mnt, &hai->hai_dfid);
 815         ct_path_archive(dst, sizeof(dst), opt.o_hsm_root, &hai->hai_fid);
 816         if (hai->hai_extent.length == -1) {
 817                 /* whole file, write it to tmp location and atomically
 818                  * replace old archived file */
 819                 strncat(dst, "_tmp", sizeof(dst) - strlen(dst) - 1);
 820                 /* we cannot rely on the same test because ct_copy_data()
 821                  * updates hai_extent.length */
 822                 rename_needed = true;
 823         }
 824
 825         CT_TRACE("archiving '%s' to '%s'", src, dst);
 826
 827         if (opt.o_dry_run) {
 828                 rc = 0;
 829                 goto fini_major;
 830         }
 831
 832         rc = ct_mkdir_p(dst);
 833         if (rc < 0) {
 834                 CT_ERROR(rc, "mkdir_p '%s' failed", dst);
 835                 goto fini_major;
 836         }
 837
 838         src_fd = llapi_hsm_action_get_fd(hcp);
 839         if (src_fd < 0) {
 840                 rc = -errno;
 841                 CT_ERROR(rc, "cannot open '%s' for read", src);
 842                 goto fini_major;
 843         }
 844
 845         open_flags = O_WRONLY | O_NOFOLLOW | O_NONBLOCK;
 846         /* If extent is specified, don't truncate an old archived copy */
 847         open_flags |= ((hai->hai_extent.length == -1) ? O_TRUNC : 0) | O_CREAT;
 848
 849         dst_fd = open(dst, open_flags, FILE_PERM);
 850         if (dst_fd == -1) {
 851                 rc = -errno;
 852                 CT_ERROR(rc, "cannot open '%s' for write", dst);
 853                 goto fini_major;
 854         }
 855
 856         /* saving stripe is not critical */
 857         rc = ct_save_stripe(src_fd, src, dst);
 858         if (rc < 0)
 859                 CT_ERROR(rc, "cannot save file striping info of '%s' in '%s'",
 860                          src, dst);
 861
 862         rc = ct_copy_data(hcp, src, dst, src_fd, dst_fd, hai, hal_flags);
 863         if (rc < 0) {
 864                 CT_ERROR(rc, "data copy failed from '%s' to '%s'", src, dst);
 865                 goto fini_major;
 866         }
 867
 868         rc = fsync(dst_fd);
 869         if (rc < 0) {
 870                 rc = -errno;
 871                 CT_ERROR(rc, "cannot flush '%s' archive file '%s'", src, dst);
 872                 goto fini_major;
 873         }
 874
 875         CT_TRACE("data archiving for '%s' to '%s' done", src, dst);
 876
 877         /* attrs will remain on the MDS; no need to copy them, except possibly
 878           for disaster recovery */
 879         if (opt.o_copy_attrs) {
 880                 rc = ct_copy_attr(src, dst, src_fd, dst_fd);
 881                 if (rc < 0) {
 882                         CT_ERROR(rc, "cannot copy attr of '%s' to '%s'",
 883                                  src, dst);
 884                         rcf = rc;
 885                 }
 886                 CT_TRACE("attr file for '%s' saved to archive '%s'",
 887                          src, dst);
 888         }
 889
 890         /* xattrs will remain on the MDS; no need to copy them, except possibly
 891          for disaster recovery */
 892         if (opt.o_copy_xattrs) {
 893                 rc = ct_copy_xattr(src, dst, src_fd, dst_fd, false);
 894                 if (rc < 0) {
 895                         CT_ERROR(rc, "cannot copy xattr of '%s' to '%s'",
 896                                  src, dst);
 897                         rcf = rcf ? rcf : rc;
 898                 }
 899                 CT_TRACE("xattr file for '%s' saved to archive '%s'",
 900                          src, dst);
 901         }
 902
 903         if (rename_needed == true) {
 904                 char     tmp_src[PATH_MAX];
 905                 char     tmp_dst[PATH_MAX];
 906
 907                 /* atomically replace old archived file */
 908                 ct_path_archive(src, sizeof(src), opt.o_hsm_root,
 909                                 &hai->hai_fid);
 910                 rc = rename(dst, src);
 911                 if (rc < 0) {
 912                         rc = -errno;
 913                         CT_ERROR(rc, "cannot rename '%s' to '%s'", dst, src);
 914                         goto fini_major;
 915                 }
 916                 /* rename lov file */
 917                 snprintf(tmp_src, sizeof(tmp_src), "%s.lov", src);
 918                 snprintf(tmp_dst, sizeof(tmp_dst), "%s.lov", dst);
 919                 rc = rename(tmp_dst, tmp_src);
 920                 if (rc < 0)
 921                         CT_ERROR(errno, "cannot rename '%s' to '%s'",
 922                                  tmp_dst, tmp_src);
 923         }
 924
 925         if (opt.o_shadow_tree) {
 926                 /* Create a namespace of softlinks that shadows the original
 927                  * Lustre namespace.  This will only be current at
 928                  * time-of-archive (won't follow renames).
 929                  * WARNING: release won't kill these links; a manual
 930                  * cleanup of dead links would be required.
 931                  */
 932                 char             buf[PATH_MAX];
 933                 long long        recno = -1;
 934                 int              linkno = 0;
 935                 char            *ptr;
 936                 int              depth = 0;
 937                 int              sz;
 938
 939                 sprintf(buf, DFID, PFID(&hai->hai_fid));
 940                 sprintf(src, "%s/shadow/", opt.o_hsm_root);
 941
 942                 ptr = opt.o_hsm_root;
 943                 while (*ptr)
 944                         (*ptr++ == '/') ? depth-- : 0;
 945
 946                 rc = llapi_fid2path(opt.o_mnt, buf, src + strlen(src),
 947                                     sizeof(src) - strlen(src), &recno, &linkno);
 948                 if (rc < 0) {
 949                         CT_ERROR(rc, "cannot get FID of '%s'", buf);
 950                         rcf = rcf ? rcf : rc;
 951                         goto fini_minor;
 952                 }
 953
 954                 /* Figure out how many parent dirs to symlink back */
 955                 ptr = src;
 956                 while (*ptr)
 957                         (*ptr++ == '/') ? depth++ : 0;
 958                 sprintf(buf, "..");
 959                 while (--depth > 1)
 960                         strcat(buf, "/..");
 961
 962                 ct_path_archive(dst, sizeof(dst), buf, &hai->hai_fid);
 963
 964                 if (ct_mkdir_p(src)) {
 965                         CT_ERROR(errno, "mkdir_p '%s' failed", src);
 966                         rcf = rcf ? rcf : -errno;
 967                         goto fini_minor;
 968                 }
 969                 /* symlink already exists ? */
 970                 sz = readlink(src, buf, sizeof(buf));
 971                 if (sz >= 0) {
 972                         buf[sz] = '\0';
 973                         if (sz == 0 || strncmp(buf, dst, sz) != 0) {
 974                                 if (unlink(src) && errno != ENOENT) {
 975                                         CT_ERROR(errno,
 976                                                  "cannot unlink symlink '%s'",
 977                                                  src);
 978                                         rcf = rcf ? rcf : -errno;
 979                                         goto fini_minor;
 980                                 /* unlink old symlink done */
 981                                 CT_TRACE("remove old symlink '%s' pointing"
 982                                          " to '%s'", src, buf);
 983                                 }
 984                         } else {
 985                                 /* symlink already ok */
 986                                 CT_TRACE("symlink '%s' already pointing"
 987                                          " to '%s'", src, dst);
 988                                 rcf = 0;
 989                                 goto fini_minor;
 990                         }
 991                 }
 992                 if (symlink(dst, src)) {
 993                         CT_ERROR(errno, "cannot symlink '%s' to '%s'",
 994                                  src, dst);
 995                         rcf = rcf ? rcf : -errno;
 996                         goto fini_minor;
 997                 }
 998                 CT_TRACE("symlink '%s' to '%s' done", src, dst);
 999         }
1000 fini_minor:
1001         if (rcf)
1002                 err_minor++;
1003         goto out;
1004
1005
1006 fini_major:
1007         err_major++;
1008
1009         unlink(dst);
1010         if (ct_is_retryable(rc))
1011                 hp_flags |= HP_FLAG_RETRY;
1012
1013         rcf = rc;
1014
1015 out:
1016         if (!(src_fd < 0))
1017                 close(src_fd);
1018
1019         if (!(dst_fd < 0))
1020                 close(dst_fd);
1021
1022         if (hcp != NULL)
1023                 rc = ct_fini(&hcp, hai, hp_flags, rcf);
1024
1025         return rc;
1026 }
1027
1028 static int ct_restore(const struct hsm_action_item *hai, const long hal_flags)
1029 {
1030         struct hsm_copyaction_private   *hcp = NULL;
1031         char                             src[PATH_MAX];
1032         char                             dst[PATH_MAX];
1033         char                             lov_buf[XATTR_SIZE_MAX];
1034         size_t                           lov_size = sizeof(lov_buf);
1035         int                              rc;
1036         int                              hp_flags = 0;
1037         int                              src_fd = -1;
1038         int                              dst_fd = -1;
1039         int                              mdt_index = -1; /* Not implemented */
1040         int                              open_flags = 0;
1041         bool                             set_lovea;
1042         struct lu_fid                    dfid;
1043         /* we fill lustre so:
1044          * source = lustre FID in the backend
1045          * destination = data FID = volatile file
1046          */
1047
1048         /* build backend file name from released file FID */
1049         ct_path_archive(src, sizeof(src), opt.o_hsm_root, &hai->hai_fid);
1050
1051         /* restore loads and sets the LOVEA w/o interpreting it to avoid
1052          * dependency on the structure format. */
1053         rc = ct_load_stripe(src, lov_buf, &lov_size);
1054         if (rc < 0) {
1055                 CT_WARN("cannot get stripe rules for '%s' (%s), use default",
1056                         src, strerror(-rc));
1057                 set_lovea = false;
1058         } else {
1059                 open_flags |= O_LOV_DELAY_CREATE;
1060                 set_lovea = true;
1061         }
1062
1063         rc = ct_begin_restore(&hcp, hai, mdt_index, open_flags);
1064         if (rc < 0)
1065                 goto fini;
1066
1067         /* get the FID of the volatile file */
1068         rc = llapi_hsm_action_get_dfid(hcp, &dfid);
1069         if (rc < 0) {
1070                 CT_ERROR(rc, "restoring "DFID
1071                          ", cannot get FID of created volatile file",
1072                          PFID(&hai->hai_fid));
1073                 goto fini;
1074         }
1075
1076         /* build volatile "file name", for messages */
1077         snprintf(dst, sizeof(dst), "{VOLATILE}="DFID, PFID(&dfid));
1078
1079         CT_TRACE("restoring data from '%s' to '%s'", src, dst);
1080
1081         if (opt.o_dry_run) {
1082                 rc = 0;
1083                 goto fini;
1084         }
1085
1086         src_fd = open(src, O_RDONLY | O_NOATIME | O_NONBLOCK | O_NOFOLLOW);
1087         if (src_fd < 0) {
1088                 rc = -errno;
1089                 CT_ERROR(rc, "cannot open '%s' for read", src);
1090                 goto fini;
1091         }
1092
1093         dst_fd = llapi_hsm_action_get_fd(hcp);
1094
1095         if (set_lovea) {
1096                 /* the layout cannot be allocated through .fid so we have to
1097                  * restore a layout */
1098                 rc = ct_restore_stripe(src, dst, dst_fd, lov_buf, lov_size);
1099                 if (rc < 0) {
1100                         CT_ERROR(rc, "cannot restore file striping info"
1101                                  " for '%s' from '%s'", dst, src);
1102                         err_major++;
1103                         goto fini;
1104                 }
1105         }
1106
1107         rc = ct_copy_data(hcp, src, dst, src_fd, dst_fd, hai, hal_flags);
1108         if (rc < 0) {
1109                 CT_ERROR(rc, "cannot copy data from '%s' to '%s'",
1110                          src, dst);
1111                 err_major++;
1112                 if (ct_is_retryable(rc))
1113                         hp_flags |= HP_FLAG_RETRY;
1114                 goto fini;
1115         }
1116
1117         CT_TRACE("data restore from '%s' to '%s' done", src, dst);
1118
1119 fini:
1120         if (hcp != NULL)
1121                 rc = ct_fini(&hcp, hai, hp_flags, rc);
1122
1123         /* object swaping is done by cdt at copy end, so close of volatile file
1124          * cannot be done before */
1125         if (!(src_fd < 0))
1126                 close(src_fd);
1127
1128         if (!(dst_fd < 0))
1129                 close(dst_fd);
1130
1131         return rc;
1132 }
1133
1134 static int ct_remove(const struct hsm_action_item *hai, const long hal_flags)
1135 {
1136         struct hsm_copyaction_private   *hcp = NULL;
1137         char                             dst[PATH_MAX];
1138         int                              rc;
1139
1140         rc = ct_begin(&hcp, hai);
1141         if (rc < 0)
1142                 goto fini;
1143
1144         ct_path_archive(dst, sizeof(dst), opt.o_hsm_root, &hai->hai_fid);
1145
1146         CT_TRACE("removing file '%s'", dst);
1147
1148         if (opt.o_dry_run) {
1149                 rc = 0;
1150                 goto fini;
1151         }
1152
1153         rc = unlink(dst);
1154         if (rc < 0) {
1155                 rc = -errno;
1156                 CT_ERROR(rc, "cannot unlink '%s'", dst);
1157                 err_minor++;
1158                 goto fini;
1159         }
1160
1161         strncat(dst, ".lov", sizeof(dst) - strlen(dst) - 1);
1162         rc = unlink(dst);
1163         if (rc < 0) {
1164                 rc = -errno;
1165                 CT_ERROR(rc, "cannot unlink '%s'", dst);
1166                 err_minor++;
1167                 goto fini;
1168         }
1169
1170 fini:
1171         if (hcp != NULL)
1172                 rc = ct_fini(&hcp, hai, 0, rc);
1173
1174         return rc;
1175 }
1176
1177 static int ct_report_error(const struct hsm_action_item *hai, int flags,
1178                            int errval)
1179 {
1180         struct hsm_copyaction_private   *hcp;
1181         int                              rc;
1182
1183         rc = llapi_hsm_action_begin(&hcp, ctdata, hai, -1, 0, true);
1184         if (rc < 0)
1185                 return rc;
1186
1187         rc = llapi_hsm_action_end(&hcp, &hai->hai_extent, flags, abs(errval));
1188
1189         return rc;
1190 }
1191
1192 static int ct_process_item(struct hsm_action_item *hai, const long hal_flags)
1193 {
1194         int     rc = 0;
1195
1196         if (opt.o_verbose >= LLAPI_MSG_INFO || opt.o_dry_run) {
1197                 /* Print the original path */
1198                 char            fid[128];
1199                 char            path[PATH_MAX];
1200                 long long       recno = -1;
1201                 int             linkno = 0;
1202
1203                 sprintf(fid, DFID, PFID(&hai->hai_fid));
1204                 CT_TRACE("'%s' action %s reclen %d, cookie="LPX64,
1205                          fid, hsm_copytool_action2name(hai->hai_action),
1206                          hai->hai_len, hai->hai_cookie);
1207                 rc = llapi_fid2path(opt.o_mnt, fid, path,
1208                                     sizeof(path), &recno, &linkno);
1209                 if (rc < 0)
1210                         CT_ERROR(rc, "cannot get path of FID %s", fid);
1211                 else
1212                         CT_TRACE("processing file '%s'", path);
1213         }
1214
1215         switch (hai->hai_action) {
1216         /* set err_major, minor inside these functions */
1217         case HSMA_ARCHIVE:
1218                 rc = ct_archive(hai, hal_flags);
1219                 break;
1220         case HSMA_RESTORE:
1221                 rc = ct_restore(hai, hal_flags);
1222                 break;
1223         case HSMA_REMOVE:
1224                 rc = ct_remove(hai, hal_flags);
1225                 break;
1226         case HSMA_CANCEL:
1227                 CT_TRACE("cancel not implemented for file system '%s'",
1228                          opt.o_mnt);
1229                 /* Don't report progress to coordinator for this cookie:
1230                  * the copy function will get ECANCELED when reporting
1231                  * progress. */
1232                 err_minor++;
1233                 return 0;
1234                 break;
1235         default:
1236                 rc = -EINVAL;
1237                 CT_ERROR(rc, "unknown action %d, on '%s'", hai->hai_action,
1238                          opt.o_mnt);
1239                 err_minor++;
1240                 ct_report_error(hai, 0, rc);
1241         }
1242
1243         return 0;
1244 }
1245
1246 struct ct_th_data {
1247         long                     hal_flags;
1248         struct hsm_action_item  *hai;
1249 };
1250
1251 static void *ct_thread(void *data)
1252 {
1253         struct ct_th_data *cttd = data;
1254         int rc;
1255
1256         rc = ct_process_item(cttd->hai, cttd->hal_flags);
1257
1258         free(cttd->hai);
1259         free(cttd);
1260         pthread_exit((void *)(intptr_t)rc);
1261 }
1262
1263 static int ct_process_item_async(const struct hsm_action_item *hai,
1264                                  long hal_flags)
1265 {
1266         pthread_attr_t           attr;
1267         pthread_t                thread;
1268         struct ct_th_data       *data;
1269         int                      rc;
1270
1271         data = malloc(sizeof(*data));
1272         if (data == NULL)
1273                 return -ENOMEM;
1274
1275         data->hai = malloc(hai->hai_len);
1276         if (data->hai == NULL) {
1277                 free(data);
1278                 return -ENOMEM;
1279         }
1280
1281         memcpy(data->hai, hai, hai->hai_len);
1282         data->hal_flags = hal_flags;
1283
1284         rc = pthread_attr_init(&attr);
1285         if (rc != 0) {
1286                 CT_ERROR(rc, "pthread_attr_init failed for '%s' service",
1287                          opt.o_mnt);
1288                 free(data->hai);
1289                 free(data);
1290                 return -rc;
1291         }
1292
1293         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
1294
1295         rc = pthread_create(&thread, &attr, ct_thread, data);
1296         if (rc != 0)
1297                 CT_ERROR(rc, "cannot create thread for '%s' service",
1298                          opt.o_mnt);
1299
1300         pthread_attr_destroy(&attr);
1301         return 0;
1302 }
1303
1304 static int ct_import_one(const char *src, const char *dst)
1305 {
1306         char            newarc[PATH_MAX];
1307         lustre_fid      fid;
1308         struct stat     st;
1309         int             rc;
1310
1311         CT_TRACE("importing '%s' from '%s'", dst, src);
1312
1313         if (stat(src, &st) < 0) {
1314                 rc = -errno;
1315                 CT_ERROR(rc, "cannot stat '%s'", src);
1316                 return rc;
1317         }
1318
1319         if (opt.o_dry_run)
1320                 return 0;
1321
1322         rc = llapi_hsm_import(dst,
1323                               opt.o_archive_cnt ? opt.o_archive_id[0] : 0,
1324                               &st, 0, 0, 0, 0, NULL, &fid);
1325         if (rc < 0) {
1326                 CT_ERROR(rc, "cannot import '%s' from '%s'", dst, src);
1327                 return rc;
1328         }
1329
1330         ct_path_archive(newarc, sizeof(newarc), opt.o_hsm_root, &fid);
1331
1332         rc = ct_mkdir_p(newarc);
1333         if (rc < 0) {
1334                 CT_ERROR(rc, "mkdir_p '%s' failed", newarc);
1335                 err_major++;
1336                 return rc;
1337
1338         }
1339
1340         /* Lots of choices now: mv, ln, ln -s ? */
1341         rc = link(src, newarc); /* hardlink */
1342         if (rc < 0) {
1343                 rc = -errno;
1344                 CT_ERROR(rc, "cannot link '%s' to '%s'", newarc, src);
1345                 err_major++;
1346                 return rc;
1347         }
1348         CT_TRACE("imported '%s' from '%s'=='%s'", dst, newarc, src);
1349
1350         return 0;
1351 }
1352
1353 static char *path_concat(const char *dirname, const char *basename)
1354 {
1355         char    *result;
1356         int      dirlen = strlen(dirname);
1357
1358         result = malloc(dirlen + strlen(basename) + 2);
1359         if (result == NULL)
1360                 return NULL;
1361
1362         memcpy(result, dirname, dirlen);
1363         result[dirlen] = '/';
1364         strcpy(result + dirlen + 1, basename);
1365
1366         return result;
1367 }
1368
1369 static int ct_import_recurse(const char *relpath)
1370 {
1371         DIR             *dir;
1372         struct dirent    ent, *cookie = NULL;
1373         char            *srcpath, *newpath;
1374         int              rc;
1375
1376         if (relpath == NULL)
1377                 return -EINVAL;
1378
1379         srcpath = path_concat(opt.o_hsm_root, relpath);
1380         if (srcpath == NULL) {
1381                 err_major++;
1382                 return -ENOMEM;
1383         }
1384
1385         dir = opendir(srcpath);
1386         if (dir == NULL) {
1387                 /* Not a dir, or error */
1388                 if (errno == ENOTDIR) {
1389                         /* Single regular file case, treat o_dst as absolute
1390                            final location. */
1391                         rc = ct_import_one(srcpath, opt.o_dst);
1392                 } else {
1393                         rc = -errno;
1394                         CT_ERROR(rc, "cannot opendir '%s'", srcpath);
1395                         err_major++;
1396                 }
1397                 free(srcpath);
1398                 return rc;
1399         }
1400         free(srcpath);
1401
1402         while (1) {
1403                 rc = readdir_r(dir, &ent, &cookie);
1404                 if (rc != 0) {
1405                         rc = -errno;
1406                         CT_ERROR(rc, "cannot readdir_r '%s'", relpath);
1407                         err_major++;
1408                         goto out;
1409                 } else if ((rc == 0) && (cookie == NULL)) {
1410                         /* end of directory */
1411                         break;
1412                 }
1413
1414                 if (!strcmp(ent.d_name, ".") ||
1415                     !strcmp(ent.d_name, ".."))
1416                         continue;
1417
1418                 /* New relative path */
1419                 newpath = path_concat(relpath, ent.d_name);
1420                 if (newpath == NULL) {
1421                         err_major++;
1422                         rc = -ENOMEM;
1423                         goto out;
1424                 }
1425
1426                 if (ent.d_type == DT_DIR) {
1427                         rc = ct_import_recurse(newpath);
1428                 } else {
1429                         char src[PATH_MAX];
1430                         char dst[PATH_MAX];
1431
1432                         sprintf(src, "%s/%s", opt.o_hsm_root, newpath);
1433                         sprintf(dst, "%s/%s", opt.o_dst, newpath);
1434                         /* Make the target dir in the Lustre fs */
1435                         rc = ct_mkdir_p(dst);
1436                         if (rc == 0) {
1437                                 /* Import the file */
1438                                 rc = ct_import_one(src, dst);
1439                         } else {
1440                                 CT_ERROR(rc, "ct_mkdir_p '%s' failed", dst);
1441                                 err_major++;
1442                         }
1443                 }
1444
1445                 if (rc != 0) {
1446                         CT_ERROR(rc, "cannot import '%s'", newpath);
1447                         if (err_major && opt.o_abort_on_error) {
1448                                 free(newpath);
1449                                 goto out;
1450                         }
1451                 }
1452                 free(newpath);
1453         }
1454
1455         rc = 0;
1456 out:
1457         closedir(dir);
1458         return rc;
1459 }
1460
1461 static int ct_rebind_one(const lustre_fid *old_fid, const lustre_fid *new_fid)
1462 {
1463         char    src[PATH_MAX];
1464         char    dst[PATH_MAX];
1465         int     rc;
1466
1467         CT_TRACE("rebind "DFID" to "DFID, PFID(old_fid), PFID(new_fid));
1468
1469         ct_path_archive(src, sizeof(src), opt.o_hsm_root, old_fid);
1470         ct_path_archive(dst, sizeof(dst), opt.o_hsm_root, new_fid);
1471
1472         if (!opt.o_dry_run) {
1473                 ct_mkdir_p(dst);
1474                 if (rename(src, dst)) {
1475                         rc = -errno;
1476                         CT_ERROR(rc, "cannot rename '%s' to '%s'", src, dst);
1477                         return -errno;
1478                 }
1479                 /* rename lov file */
1480                 strncat(src, ".lov", sizeof(src) - strlen(src) - 1);
1481                 strncat(dst, ".lov", sizeof(dst) - strlen(dst) - 1);
1482                 if (rename(src, dst))
1483                         CT_ERROR(errno, "cannot '%s' rename to '%s'", src, dst);
1484
1485         }
1486         return 0;
1487 }
1488
1489 static bool fid_is_file(lustre_fid *fid)
1490 {
1491         return fid_is_norm(fid) || fid_is_igif(fid);
1492 }
1493
1494 static bool should_ignore_line(const char *line)
1495 {
1496         int     i;
1497
1498         for (i = 0; line[i] != '\0'; i++) {
1499                 if (isspace(line[i]))
1500                         continue;
1501                 else if (line[i] == '#')
1502                         return true;
1503                 else
1504                         return false;
1505         }
1506
1507         return true;
1508 }
1509
1510 static int ct_rebind_list(const char *list)
1511 {
1512         int              rc;
1513         FILE            *filp;
1514         ssize_t          r;
1515         char            *line = NULL;
1516         size_t           line_size = 0;
1517         unsigned int     nl = 0;
1518         unsigned int     ok = 0;
1519
1520         filp = fopen(list, "r");
1521         if (filp == NULL) {
1522                 rc = -errno;
1523                 CT_ERROR(rc, "cannot open '%s'", list);
1524                 return rc;
1525         }
1526
1527         /* each line consists of 2 FID */
1528         while ((r = getline(&line, &line_size, filp)) != -1) {
1529                 lustre_fid      old_fid;
1530                 lustre_fid      new_fid;
1531
1532                 /* Ignore empty and commented out ('#...') lines. */
1533                 if (should_ignore_line(line))
1534                         continue;
1535
1536                 nl++;
1537
1538                 rc = sscanf(line, SFID" "SFID, RFID(&old_fid), RFID(&new_fid));
1539                 if (rc != 6 || !fid_is_file(&old_fid) ||
1540                     !fid_is_file(&new_fid)) {
1541                         CT_ERROR(EINVAL,
1542                                  "'%s' FID expected near '%s', line %u",
1543                                  list, line, nl);
1544                         err_major++;
1545                         continue;
1546                 }
1547
1548                 if (ct_rebind_one(&old_fid, &new_fid))
1549                         err_major++;
1550                 else
1551                         ok++;
1552         }
1553
1554         fclose(filp);
1555
1556         if (line)
1557                 free(line);
1558
1559         /* return 0 if all rebinds were sucessful */
1560         CT_TRACE("%u lines read from '%s', %u rebind successful", nl, list, ok);
1561
1562         return ok == nl ? 0 : -1;
1563 }
1564
1565 static int ct_rebind(void)
1566 {
1567         int     rc;
1568
1569         if (opt.o_dst) {
1570                 lustre_fid      old_fid;
1571                 lustre_fid      new_fid;
1572
1573                 if (sscanf(opt.o_src, SFID, RFID(&old_fid)) != 3 ||
1574                     !fid_is_file(&old_fid)) {
1575                         rc = -EINVAL;
1576                         CT_ERROR(rc, "'%s' invalid FID format", opt.o_src);
1577                         return rc;
1578                 }
1579
1580                 if (sscanf(opt.o_dst, SFID, RFID(&new_fid)) != 3 ||
1581                     !fid_is_file(&new_fid)) {
1582                         rc = -EINVAL;
1583                         CT_ERROR(rc, "'%s' invalid FID format", opt.o_dst);
1584                         return rc;
1585                 }
1586
1587                 rc = ct_rebind_one(&old_fid, &new_fid);
1588
1589                 return rc;
1590         }
1591
1592         /* o_src is a list file */
1593         rc = ct_rebind_list(opt.o_src);
1594
1595         return rc;
1596 }
1597
1598 static int ct_dir_level_max(const char *dirpath, __u16 *sub_seqmax)
1599 {
1600         DIR             *dir;
1601         int              rc;
1602         __u16            sub_seq;
1603         struct dirent    ent, *cookie = NULL;
1604
1605         *sub_seqmax = 0;
1606
1607         dir = opendir(dirpath);
1608         if (dir == NULL) {
1609                 rc = -errno;
1610                 CT_ERROR(rc, "cannot open directory '%s'", opt.o_hsm_root);
1611                 return rc;
1612         }
1613
1614         while ((rc = readdir_r(dir, &ent, &cookie)) == 0) {
1615                 if (cookie == NULL)
1616                         /* end of directory.
1617                          * rc is 0 and seqmax contains the max value. */
1618                         goto out;
1619
1620                 if (!strcmp(ent.d_name, ".") || !strcmp(ent.d_name, ".."))
1621                         continue;
1622
1623                 if (sscanf(ent.d_name, "%hx", &sub_seq) != 1) {
1624                         CT_TRACE("'%s' has an unexpected dirname format, "
1625                                  "skip entry", ent.d_name);
1626                         continue;
1627                 }
1628                 if (sub_seq > *sub_seqmax)
1629                         *sub_seqmax = sub_seq;
1630         }
1631         rc = -errno;
1632         CT_ERROR(rc, "cannot readdir_r '%s'", dirpath);
1633
1634 out:
1635         closedir(dir);
1636         return rc;
1637 }
1638
1639 static int ct_max_sequence(void)
1640 {
1641         int   rc, i;
1642         char  path[PATH_MAX];
1643         __u64 seq = 0;
1644         __u16 subseq;
1645
1646         strncpy(path, opt.o_hsm_root, sizeof(path));
1647         /* FID sequence is stored in top-level directory names:
1648          * hsm_root/16bits (high weight)/16 bits/16 bits/16 bits (low weight).
1649          */
1650         for (i = 0; i < 4; i++) {
1651                 rc = ct_dir_level_max(path, &subseq);
1652                 if (rc != 0)
1653                         return rc;
1654                 seq |= ((__u64)subseq << ((3 - i) * 16));
1655                 sprintf(path + strlen(path), "/%04x", subseq);
1656         }
1657
1658         printf("max_sequence: %016Lx\n", seq);
1659
1660         return 0;
1661 }
1662
1663 static void handler(int signal)
1664 {
1665         psignal(signal, "exiting");
1666         /* If we don't clean up upon interrupt, umount thinks there's a ref
1667          * and doesn't remove us from mtab (EINPROGRESS). The lustre client
1668          * does successfully unmount and the mount is actually gone, but the
1669          * mtab entry remains. So this just makes mtab happier. */
1670         llapi_hsm_copytool_unregister(&ctdata);
1671         _exit(1);
1672 }
1673
1674 /* Daemon waits for messages from the kernel; run it in the background. */
1675 static int ct_run(void)
1676 {
1677         int     rc;
1678
1679         if (opt.o_daemonize) {
1680                 rc = daemon(1, 1);
1681                 if (rc < 0) {
1682                         rc = -errno;
1683                         CT_ERROR(rc, "cannot daemonize");
1684                         return rc;
1685                 }
1686         }
1687
1688         setbuf(stdout, NULL);
1689
1690         rc = llapi_hsm_copytool_register(&ctdata, opt.o_mnt, 0,
1691                                          opt.o_archive_cnt, opt.o_archive_id);
1692         if (rc < 0) {
1693                 CT_ERROR(rc, "cannot start copytool interface");
1694                 return rc;
1695         }
1696
1697         signal(SIGINT, handler);
1698         signal(SIGTERM, handler);
1699
1700         while (1) {
1701                 struct hsm_action_list  *hal;
1702                 struct hsm_action_item  *hai;
1703                 int                      msgsize;
1704                 int                      i = 0;
1705
1706                 CT_TRACE("waiting for message from kernel");
1707
1708                 rc = llapi_hsm_copytool_recv(ctdata, &hal, &msgsize);
1709                 if (rc == -ESHUTDOWN) {
1710                         CT_TRACE("shutting down");
1711                         break;
1712                 } else if (rc == -EAGAIN) {
1713                         continue; /* msg not for us */
1714                 } else if (rc < 0) {
1715                         CT_WARN("cannot receive action list: %s",
1716                                 strerror(-rc));
1717                         err_major++;
1718                         if (opt.o_abort_on_error)
1719                                 break;
1720                         else
1721                                 continue;
1722                 }
1723
1724                 CT_TRACE("copytool fs=%s archive#=%d item_count=%d",
1725                          hal->hal_fsname, hal->hal_archive_id, hal->hal_count);
1726
1727                 if (strcmp(hal->hal_fsname, fs_name) != 0) {
1728                         CT_ERROR(EINVAL, "'%s' invalid fs name, expecting: %s",
1729                                  hal->hal_fsname, fs_name);
1730                         err_major++;
1731                         if (opt.o_abort_on_error)
1732                                 break;
1733                         else
1734                                 continue;
1735                 }
1736
1737                 hai = hai_first(hal);
1738                 while (++i <= hal->hal_count) {
1739                         if ((char *)hai - (char *)hal > msgsize) {
1740                                 rc = -EPROTO;
1741                                 CT_ERROR(rc,
1742                                          "'%s' item %d past end of message!",
1743                                          opt.o_mnt, i);
1744                                 err_major++;
1745                                 break;
1746                         }
1747                         rc = ct_process_item_async(hai, hal->hal_flags);
1748                         if (rc < 0)
1749                                 CT_ERROR(rc, "'%s' item %d process",
1750                                          opt.o_mnt, i);
1751                         if (opt.o_abort_on_error && err_major)
1752                                 break;
1753                         hai = hai_next(hai);
1754                 }
1755
1756                 llapi_hsm_action_list_free(&hal);
1757
1758                 if (opt.o_abort_on_error && err_major)
1759                         break;
1760         }
1761
1762         llapi_hsm_copytool_unregister(&ctdata);
1763
1764         return rc;
1765 }
1766
1767 static int ct_setup(void)
1768 {
1769         int     rc;
1770
1771         /* set llapi message level */
1772         llapi_msg_set_level(opt.o_verbose);
1773
1774         arc_fd = open(opt.o_hsm_root, O_RDONLY);
1775         if (arc_fd < 0) {
1776                 rc = -errno;
1777                 CT_ERROR(rc, "cannot open archive at '%s'", opt.o_hsm_root);
1778                 return rc;
1779         }
1780
1781         rc = llapi_search_fsname(opt.o_mnt, fs_name);
1782         if (rc < 0) {
1783                 CT_ERROR(rc, "cannot find a Lustre filesystem mounted at '%s'",
1784                          opt.o_mnt);
1785                 return -rc;
1786         }
1787
1788         return rc;
1789 }
1790
1791 static int ct_cleanup(void)
1792 {
1793         int     rc;
1794
1795         if (arc_fd < 0)
1796                 return 0;
1797
1798         if (close(arc_fd) < 0) {
1799                 rc = -errno;
1800                 CT_ERROR(rc, "cannot close archive root directory");
1801                 return rc;
1802         }
1803
1804         return 0;
1805 }
1806
1807 int main(int argc, char **argv)
1808 {
1809         int     rc;
1810
1811         strncpy(cmd_name, basename(argv[0]), sizeof(cmd_name));
1812         rc = ct_parseopts(argc, argv);
1813         if (rc < 0) {
1814                 CT_WARN("try '%s --help' for more information", cmd_name);
1815                 return -rc;
1816         }
1817
1818         ct_setup();
1819
1820         switch (opt.o_action) {
1821         case CA_IMPORT:
1822                 rc = ct_import_recurse(opt.o_src);
1823                 break;
1824         case CA_REBIND:
1825                 rc = ct_rebind();
1826                 break;
1827         case CA_MAXSEQ:
1828                 rc = ct_max_sequence();
1829                 break;
1830         default:
1831                 rc = ct_run();
1832                 break;
1833         }
1834
1835         if (opt.o_action != CA_MAXSEQ)
1836                 CT_TRACE("process finished, errs: %d major, %d minor,"
1837                          " rc=%d (%s)", err_major, err_minor, rc,
1838                          strerror(-rc));
1839
1840         ct_cleanup();
1841
1842         return -rc;
1843 }
1844