lustre/utils/lfs_project.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.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2017, DataDirect Networks Storage.
  24  * Copyright (c) 2017, Intel Corporation.
  25  */
  26 /*
  27  * This file is part of Lustre, http://www.lustre.org/
  28  *
  29  * lustre/utils/lfs_project.c
  30  *
  31  * Author: Wang Shilong <wshilong@ddn.com>
  32  * Author: Fan Yong <fan.yong@intel.com>
  33  */
  34 #include <errno.h>
  35 #include <getopt.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <strings.h>
  39 #include <unistd.h>
  40 #include <fcntl.h>
  41 #include <dirent.h>
  42 #include <stddef.h>
  43 #include <libintl.h>
  44 #include <sys/stat.h>
  45 #include <sys/types.h>
  46 #include <string.h>
  47 #include <libcfs/util/list.h>
  48 #include <libcfs/util/ioctl.h>
  49 #include <sys/ioctl.h>
  50
  51 #include "lfs_project.h"
  52 #include <lustre/lustreapi.h>
  53
  54 struct lfs_project_item {
  55         struct list_head lpi_list;
  56         char lpi_pathname[PATH_MAX];
  57 };
  58
  59 static int
  60 lfs_project_item_alloc(struct list_head *head, const char *pathname)
  61 {
  62         struct lfs_project_item *lpi;
  63
  64         lpi = malloc(sizeof(struct lfs_project_item));
  65         if (lpi == NULL) {
  66                 fprintf(stderr,
  67                         "%s: cannot allocate project item for '%s': %s\n",
  68                         progname, pathname, strerror(ENOMEM));
  69                 return -ENOMEM;
  70         }
  71
  72         strncpy(lpi->lpi_pathname, pathname, sizeof(lpi->lpi_pathname));
  73         list_add_tail(&lpi->lpi_list, head);
  74
  75         return 0;
  76 }
  77
  78 static int project_get_xattr(const char *pathname, struct fsxattr *fsx)
  79 {
  80         int ret, fd;
  81
  82         fd = open(pathname, O_RDONLY | O_NOCTTY | O_NDELAY);
  83         if (fd < 0) {
  84                 fprintf(stderr, "%s: failed to open '%s': %s\n",
  85                         progname, pathname, strerror(errno));
  86                 return -errno;
  87         }
  88
  89         ret = ioctl(fd, LL_IOC_FSGETXATTR, fsx);
  90         if (ret) {
  91                 fprintf(stderr, "%s: failed to get xattr for '%s': %s\n",
  92                         progname, pathname, strerror(errno));
  93                 close(fd);
  94                 return -errno;
  95         }
  96         return fd;
  97 }
  98
  99 static int
 100 project_check_one(const char *pathname, struct project_handle_control *phc)
 101 {
 102         struct fsxattr fsx;
 103         struct stat st;
 104         int ret;
 105
 106         ret = stat(pathname, &st);
 107         if (ret) {
 108                 fprintf(stderr, "%s: failed to stat '%s': %s\n",
 109                         progname, pathname, strerror(errno));
 110                 return -errno;
 111         }
 112
 113         ret = project_get_xattr(pathname, &fsx);
 114         if (ret < 0)
 115                 return ret;
 116
 117         /* use top directory's project ID if not specified */
 118         if (!phc->assign_projid) {
 119                 phc->assign_projid = true;
 120                 phc->projid = fsx.fsx_projid;
 121         }
 122
 123         if (!(fsx.fsx_xflags & FS_XFLAG_PROJINHERIT)) {
 124                 if (!phc->newline) {
 125                         printf("%s%c", pathname, '\0');
 126                         goto out;
 127                 }
 128                  printf("%s - project inheritance flag is not set\n",
 129                         pathname);
 130         }
 131
 132         if (fsx.fsx_projid != phc->projid) {
 133                 if (!phc->newline) {
 134                         printf("%s%c", pathname, '\0');
 135                         goto out;
 136                 }
 137                 printf("%s - project identifier is not set (inode=%u, tree=%u)\n",
 138                        pathname, fsx.fsx_projid, phc->projid);
 139         }
 140 out:
 141         close(ret);
 142         return 0;
 143 }
 144
 145 static int
 146 project_list_one(const char *pathname, struct project_handle_control *phc)
 147 {
 148         struct fsxattr fsx;
 149         int ret;
 150
 151         ret = project_get_xattr(pathname, &fsx);
 152         if (ret < 0)
 153                 return ret;
 154
 155         printf("%5u %c %s\n", fsx.fsx_projid,
 156                (fsx.fsx_xflags & FS_XFLAG_PROJINHERIT) ?
 157                 'P' : '-', pathname);
 158
 159         close(ret);
 160         return 0;
 161 }
 162
 163 static int
 164 project_set_one(const char *pathname, struct project_handle_control *phc)
 165 {
 166         struct fsxattr fsx;
 167         int fd, ret = 0;
 168
 169         fd = project_get_xattr(pathname, &fsx);
 170         if (fd < 0)
 171                 return fd;
 172
 173         if ((!phc->set_projid || fsx.fsx_projid == phc->projid) &&
 174             (!phc->set_inherit || (fsx.fsx_xflags & FS_XFLAG_PROJINHERIT)))
 175                 goto out;
 176
 177         if (phc->set_inherit)
 178                 fsx.fsx_xflags |= FS_XFLAG_PROJINHERIT;
 179         if (phc->set_projid)
 180                 fsx.fsx_projid = phc->projid;
 181
 182         ret = ioctl(fd, LL_IOC_FSSETXATTR, &fsx);
 183         if (ret)
 184                 fprintf(stderr, "%s: failed to set xattr for '%s': %s\n",
 185                         progname, pathname, strerror(errno));
 186 out:
 187         close(fd);
 188         return ret;
 189 }
 190
 191 static int
 192 project_clear_one(const char *pathname, struct project_handle_control *phc)
 193 {
 194         struct fsxattr fsx;
 195         int ret = 0, fd;
 196
 197         fd = project_get_xattr(pathname, &fsx);
 198         if (fd < 0)
 199                 return fd;
 200
 201         if ((!(fsx.fsx_xflags & FS_XFLAG_PROJINHERIT)) &&
 202              (fsx.fsx_projid == 0 || phc->keep_projid))
 203                 goto out;
 204
 205         fsx.fsx_xflags &= ~FS_XFLAG_PROJINHERIT;
 206         if (!phc->keep_projid)
 207                 fsx.fsx_projid = 0;
 208
 209         ret = ioctl(fd, LL_IOC_FSSETXATTR, &fsx);
 210         if (ret)
 211                 fprintf(stderr, "%s: failed to set xattr for '%s': %s\n",
 212                         progname, pathname, strerror(errno));
 213 out:
 214         close(fd);
 215         return ret;
 216 }
 217
 218 static int
 219 lfs_project_handle_dir(struct list_head *head, const char *pathname,
 220                        struct project_handle_control *phc,
 221                        int (*func)(const char *,
 222                                    struct project_handle_control *))
 223 {
 224         char fullname[PATH_MAX];
 225         struct dirent *ent;
 226         DIR *dir;
 227         int ret = 0;
 228         int rc;
 229
 230         dir = opendir(pathname);
 231         if (dir == NULL) {
 232                 ret = -errno;
 233                 fprintf(stderr, "%s: failed to opendir '%s': %s\n",
 234                         progname, pathname, strerror(-ret));
 235                 return ret;
 236         }
 237
 238         while ((ent = readdir(dir)) != NULL) {
 239                 /* skip "." and ".." */
 240                 if (strcmp(ent->d_name, ".") == 0 ||
 241                     strcmp(ent->d_name, "..") == 0)
 242                         continue;
 243
 244                 if (strlen(ent->d_name) + strlen(pathname) + 1 >=
 245                     sizeof(fullname)) {
 246                         ret = -ENAMETOOLONG;
 247                         errno = ENAMETOOLONG;
 248                         fprintf(stderr, "%s: ignored too long path: %s/%s\n",
 249                                         progname, pathname, ent->d_name);
 250                         continue;
 251                 }
 252                 snprintf(fullname, PATH_MAX, "%s/%s", pathname,
 253                          ent->d_name);
 254
 255                 rc = func(fullname, phc);
 256                 if (rc && !ret)
 257                         ret = rc;
 258                 if (phc->recursive && ent->d_type == DT_DIR) {
 259                         rc = lfs_project_item_alloc(head, fullname);
 260                         if (rc && !ret)
 261                                 ret = rc;
 262                 }
 263         }
 264
 265         closedir(dir);
 266         return ret;
 267 }
 268
 269 static int lfs_project_iterate(const char *pathname,
 270                                struct project_handle_control *phc,
 271                                int (*func)(const char *,
 272                                            struct project_handle_control *))
 273 {
 274         struct lfs_project_item *lpi;
 275         struct list_head head;
 276         struct stat st;
 277         int ret = 0;
 278         int rc = 0;
 279
 280         ret = stat(pathname, &st);
 281         if (ret) {
 282                 fprintf(stderr, "%s: failed to stat '%s': %s\n",
 283                         progname, pathname, strerror(errno));
 284                 return ret;
 285         }
 286
 287         /* list opeation will skip top directory in default */
 288         if (!S_ISDIR(st.st_mode) || phc->dironly ||
 289             project_list_one != func)
 290                 ret = func(pathname, phc);
 291
 292         /* dironly first, recursive will be ignored */
 293         if (!S_ISDIR(st.st_mode) || phc->dironly || ret)
 294                 return ret;
 295
 296         INIT_LIST_HEAD(&head);
 297         ret = lfs_project_item_alloc(&head, pathname);
 298         if (ret)
 299                 return ret;
 300
 301         while (!list_empty(&head)) {
 302                 lpi = list_entry(head.next, struct lfs_project_item, lpi_list);
 303                 list_del(&lpi->lpi_list);
 304                 rc = lfs_project_handle_dir(&head, lpi->lpi_pathname,
 305                                              phc, func);
 306                 if (!ret && rc)
 307                         ret = rc;
 308                 free(lpi);
 309         }
 310
 311         return ret;
 312 }
 313
 314
 315 inline int lfs_project_check(const char *pathname,
 316                              struct project_handle_control *phc)
 317 {
 318         return lfs_project_iterate(pathname, phc, project_check_one);
 319 }
 320
 321 inline int lfs_project_clear(const char *pathname,
 322                              struct project_handle_control *phc)
 323 {
 324         return lfs_project_iterate(pathname, phc, project_clear_one);
 325 }
 326
 327 inline int lfs_project_set(const char *pathname,
 328                            struct project_handle_control *phc)
 329 {
 330         return lfs_project_iterate(pathname, phc, project_set_one);
 331 }
 332
 333 inline int lfs_project_list(const char *pathname,
 334                             struct project_handle_control *phc)
 335 {
 336         return lfs_project_iterate(pathname, phc, project_list_one);
 337 }