source3/modules/gpfs.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Provide a connection to GPFS specific features
   4  *  Copyright (C) Volker Lendecke 2005
   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 as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "system/filesys.h"
  22 #include "smbd/smbd.h"
  23
  24 #include <fcntl.h>
  25 #include <gpfs_fcntl.h>
  26 #include "vfs_gpfs.h"
  27
  28 static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
  29 static int (*gpfs_set_lease_fn)(int fd, unsigned int type);
  30 static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
  31 static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
  32 static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
  33                                             int *len);
  34 static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags,
  35                                         struct gpfs_winattr *attrs);
  36 static int (*gpfs_get_winattrs_path_fn)(char *pathname,
  37                                         struct gpfs_winattr *attrs);
  38 static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
  39 static int (*gpfs_prealloc_fn)(int fd, gpfs_off64_t start, gpfs_off64_t bytes);
  40 static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
  41 static int (*gpfs_lib_init_fn)(int flags);
  42 static int (*gpfs_set_times_path_fn)(char *pathname, int flags,
  43                                      gpfs_timestruc_t times[4]);
  44 static int (*gpfs_quotactl_fn)(char *pathname, int cmd, int id, void *bufp);
  45 static int (*gpfs_fcntl_fn)(int fd, void *argp);
  46 static int (*gpfs_getfilesetid_fn)(char *pathname, char *name, int *idp);
  47
  48 int gpfswrap_init(void)
  49 {
  50         static void *l;
  51
  52         if (l != NULL) {
  53                 return 0;
  54         }
  55
  56         l = dlopen("libgpfs.so", RTLD_LAZY);
  57         if (l == NULL) {
  58                 return -1;
  59         }
  60
  61         gpfs_set_share_fn             = dlsym(l, "gpfs_set_share");
  62         gpfs_set_lease_fn             = dlsym(l, "gpfs_set_lease");
  63         gpfs_getacl_fn                = dlsym(l, "gpfs_getacl");
  64         gpfs_putacl_fn                = dlsym(l, "gpfs_putacl");
  65         gpfs_get_realfilename_path_fn = dlsym(l, "gpfs_get_realfilename_path");
  66         gpfs_set_winattrs_path_fn     = dlsym(l, "gpfs_set_winattrs_path");
  67         gpfs_get_winattrs_path_fn     = dlsym(l, "gpfs_get_winattrs_path");
  68         gpfs_get_winattrs_fn          = dlsym(l, "gpfs_get_winattrs");
  69         gpfs_prealloc_fn              = dlsym(l, "gpfs_prealloc");
  70         gpfs_ftruncate_fn             = dlsym(l, "gpfs_ftruncate");
  71         gpfs_lib_init_fn              = dlsym(l, "gpfs_lib_init");
  72         gpfs_set_times_path_fn        = dlsym(l, "gpfs_set_times_path");
  73         gpfs_quotactl_fn              = dlsym(l, "gpfs_quotactl");
  74         gpfs_fcntl_fn                 = dlsym(l, "gpfs_fcntl");
  75         gpfs_getfilesetid_fn          = dlsym(l, "gpfs_getfilesetid");
  76
  77         return 0;
  78 }
  79
  80 int gpfswrap_set_share(int fd, unsigned int allow, unsigned int deny)
  81 {
  82         if (gpfs_set_share_fn == NULL) {
  83                 errno = ENOSYS;
  84                 return -1;
  85         }
  86
  87         return gpfs_set_share_fn(fd, allow, deny);
  88 }
  89
  90 int gpfswrap_set_lease(int fd, unsigned int type)
  91 {
  92         if (gpfs_set_lease_fn == NULL) {
  93                 errno = ENOSYS;
  94                 return -1;
  95         }
  96
  97         return gpfs_set_lease_fn(fd, type);
  98 }
  99
 100 int gpfswrap_getacl(char *pathname, int flags, void *acl)
 101 {
 102         if (gpfs_getacl_fn == NULL) {
 103                 errno = ENOSYS;
 104                 return -1;
 105         }
 106
 107         return gpfs_getacl_fn(pathname, flags, acl);
 108 }
 109
 110 int gpfswrap_putacl(char *pathname, int flags, void *acl)
 111 {
 112         if (gpfs_putacl_fn == NULL) {
 113                 errno = ENOSYS;
 114                 return -1;
 115         }
 116
 117         return gpfs_putacl_fn(pathname, flags, acl);
 118 }
 119
 120 int gpfswrap_get_realfilename_path(char *pathname, char *filenamep, int *len)
 121 {
 122         if (gpfs_get_realfilename_path_fn == NULL) {
 123                 errno = ENOSYS;
 124                 return -1;
 125         }
 126
 127         return gpfs_get_realfilename_path_fn(pathname, filenamep, len);
 128 }
 129
 130 int gpfswrap_set_winattrs_path(char *pathname, int flags,
 131                                struct gpfs_winattr *attrs)
 132 {
 133         if (gpfs_set_winattrs_path_fn == NULL) {
 134                 errno = ENOSYS;
 135                 return -1;
 136         }
 137
 138         return gpfs_set_winattrs_path_fn(pathname, flags, attrs);
 139 }
 140
 141 int gpfswrap_get_winattrs_path(char *pathname, struct gpfs_winattr *attrs)
 142 {
 143         if (gpfs_get_winattrs_path_fn == NULL) {
 144                 errno = ENOSYS;
 145                 return -1;
 146         }
 147
 148         return gpfs_get_winattrs_path_fn(pathname, attrs);
 149 }
 150
 151 int gpfswrap_get_winattrs(int fd, struct gpfs_winattr *attrs)
 152 {
 153         if (gpfs_get_winattrs_fn == NULL) {
 154                 errno = ENOSYS;
 155                 return -1;
 156         }
 157
 158         return gpfs_get_winattrs_fn(fd, attrs);
 159 }
 160
 161 int gpfswrap_prealloc(int fd, gpfs_off64_t start, gpfs_off64_t bytes)
 162 {
 163         if (gpfs_prealloc_fn == NULL) {
 164                 errno = ENOSYS;
 165                 return -1;
 166         }
 167
 168         return gpfs_prealloc_fn(fd, start, bytes);
 169 }
 170
 171 int gpfswrap_ftruncate(int fd, gpfs_off64_t length)
 172 {
 173         if (gpfs_ftruncate_fn == NULL) {
 174                 errno = ENOSYS;
 175                 return -1;
 176         }
 177
 178         return gpfs_ftruncate_fn(fd, length);
 179 }
 180
 181 int gpfswrap_lib_init(int flags)
 182 {
 183         if (gpfs_lib_init_fn == NULL) {
 184                 errno = ENOSYS;
 185                 return -1;
 186         }
 187
 188         return gpfs_lib_init_fn(flags);
 189 }
 190
 191 int gpfswrap_set_times_path(char *pathname, int flags,
 192                             gpfs_timestruc_t times[4])
 193 {
 194         if (gpfs_set_times_path_fn == NULL) {
 195                 errno = ENOSYS;
 196                 return -1;
 197         }
 198
 199         return gpfs_set_times_path_fn(pathname, flags, times);
 200 }
 201
 202 int gpfswrap_quotactl(char *pathname, int cmd, int id, void *bufp)
 203 {
 204         if (gpfs_quotactl_fn == NULL) {
 205                 errno = ENOSYS;
 206                 return -1;
 207         }
 208
 209         return gpfs_quotactl_fn(pathname, cmd, id, bufp);
 210 }
 211
 212 int gpfswrap_fcntl(int fd, void *argp)
 213 {
 214         if (gpfs_fcntl_fn == NULL) {
 215                 errno = ENOSYS;
 216                 return -1;
 217         }
 218
 219         return gpfs_fcntl_fn(fd, argp);
 220 }
 221
 222 int gpfswrap_getfilesetid(char *pathname, char *name, int *idp)
 223 {
 224         if (gpfs_getfilesetid_fn == NULL) {
 225                 errno = ENOSYS;
 226                 return -1;
 227         }
 228
 229         return gpfs_getfilesetid_fn(pathname, name, idp);
 230 }
 231
 232 int set_gpfs_lease(int fd, int leasetype)
 233 {
 234         int gpfs_type = GPFS_LEASE_NONE;
 235
 236         if (leasetype == F_RDLCK) {
 237                 gpfs_type = GPFS_LEASE_READ;
 238         }
 239         if (leasetype == F_WRLCK) {
 240                 gpfs_type = GPFS_LEASE_WRITE;
 241         }
 242
 243         /* we unconditionally set CAP_LEASE, rather than looking for
 244            -1/EACCES as there is a bug in some versions of
 245            libgpfs_gpl.so which results in a leaked fd on /dev/ss0
 246            each time we try this with the wrong capabilities set
 247         */
 248         linux_set_lease_capability();
 249         return gpfswrap_set_lease(fd, gpfs_type);
 250 }
 251
 252 int get_gpfs_quota(const char *pathname, int type, int id,
 253                    struct gpfs_quotaInfo *qi)
 254 {
 255         int ret;
 256
 257         ZERO_STRUCTP(qi);
 258         ret = gpfswrap_quotactl(discard_const_p(char, pathname),
 259                                 GPFS_QCMD(Q_GETQUOTA, type), id, qi);
 260
 261         if (ret) {
 262                 if (errno == GPFS_E_NO_QUOTA_INST) {
 263                         DEBUG(10, ("Quotas disabled on GPFS filesystem.\n"));
 264                 } else if (errno != ENOSYS) {
 265                         DEBUG(0, ("Get quota failed, type %d, id, %d, "
 266                                   "errno %d.\n", type, id, errno));
 267                 }
 268
 269                 return ret;
 270         }
 271
 272         DEBUG(10, ("quota type %d, id %d, blk u:%lld h:%lld s:%lld gt:%u\n",
 273                    type, id, qi->blockUsage, qi->blockHardLimit,
 274                    qi->blockSoftLimit, qi->blockGraceTime));
 275
 276         return ret;
 277 }
 278
 279 int get_gpfs_fset_id(const char *pathname, int *fset_id)
 280 {
 281         int err, fd, errno_fcntl;
 282
 283         struct {
 284                 gpfsFcntlHeader_t hdr;
 285                 gpfsGetFilesetName_t fsn;
 286         } arg;
 287
 288         arg.hdr.totalLength = sizeof(arg);
 289         arg.hdr.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
 290         arg.hdr.fcntlReserved = 0;
 291         arg.fsn.structLen = sizeof(arg.fsn);
 292         arg.fsn.structType = GPFS_FCNTL_GET_FILESETNAME;
 293
 294         fd = open(pathname, O_RDONLY);
 295         if (fd == -1) {
 296                 DEBUG(1, ("Could not open %s: %s\n",
 297                           pathname, strerror(errno)));
 298                 return fd;
 299         }
 300
 301         err = gpfswrap_fcntl(fd, &arg);
 302         errno_fcntl = errno;
 303         close(fd);
 304
 305         if (err) {
 306                 errno = errno_fcntl;
 307                 if (errno != ENOSYS) {
 308                         DEBUG(1, ("GPFS_FCNTL_GET_FILESETNAME for %s failed: "
 309                                   "%s\n", pathname, strerror(errno)));
 310                 }
 311                 return err;
 312         }
 313
 314         err = gpfswrap_getfilesetid(discard_const_p(char, pathname),
 315                                     arg.fsn.buffer, fset_id);
 316         if (err && errno != ENOSYS) {
 317                 DEBUG(1, ("gpfs_getfilesetid for %s failed: %s\n",
 318                           pathname, strerror(errno)));
 319         }
 320         return err;
 321 }
 322
 323 static void timespec_to_gpfs_time(struct timespec ts, gpfs_timestruc_t *gt,
 324                                   int idx, int *flags)
 325 {
 326         if (!null_timespec(ts)) {
 327                 *flags |= 1 << idx;
 328                 gt[idx].tv_sec = ts.tv_sec;
 329                 gt[idx].tv_nsec = ts.tv_nsec;
 330                 DEBUG(10, ("Setting GPFS time %d, flags 0x%x\n", idx, *flags));
 331         }
 332 }
 333
 334 int smbd_gpfs_set_times_path(char *path, struct smb_file_time *ft)
 335 {
 336         gpfs_timestruc_t gpfs_times[4];
 337         int flags = 0;
 338         int rc;
 339
 340         ZERO_ARRAY(gpfs_times);
 341         timespec_to_gpfs_time(ft->atime, gpfs_times, 0, &flags);
 342         timespec_to_gpfs_time(ft->mtime, gpfs_times, 1, &flags);
 343         /* No good mapping from LastChangeTime to ctime, not storing */
 344         timespec_to_gpfs_time(ft->create_time, gpfs_times, 3, &flags);
 345
 346         if (!flags) {
 347                 DEBUG(10, ("nothing to do, return to avoid EINVAL\n"));
 348                 return 0;
 349         }
 350
 351         rc = gpfswrap_set_times_path(path, flags, gpfs_times);
 352
 353         if (rc != 0 && errno != ENOSYS) {
 354                 DEBUG(1,("gpfs_set_times() returned with error %s\n",
 355                         strerror(errno)));
 356         }
 357
 358         return rc;
 359 }