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);
  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                 return -errno;
  94         }
  95         return fd;
  96 }
  97
  98 static int
  99 project_check_one(const char *pathname, struct project_handle_control *phc)
 100 {
 101         struct fsxattr fsx;
 102         struct stat st;
 103         int ret;
 104
 105         ret = stat(pathname, &st);
 106         if (ret) {
 107                 fprintf(stderr, "%s: failed to stat '%s': %s\n",
 108                         progname, pathname, strerror(errno));
 109                 return -errno;
 110         }
 111
 112         ret = project_get_xattr(pathname, &fsx);
 113         if (ret < 0)
 114                 return ret;
 115
 116         /* use top directory's project ID if not specified */
 117         if (!phc->assign_projid) {
 118                 phc->assign_projid = true;
 119                 phc->projid = fsx.fsx_projid;
 120         }
 121
 122         if (!(fsx.fsx_xflags & LL_PROJINHERIT_FL)) {
 123                 if (!phc->newline) {
 124                         printf("%s%c", pathname, '\0');
 125                         goto out;
 126                 }
 127                  printf("%s - project inheritance flag is not set\n",
 128                         pathname);
 129         }
 130
 131         if (fsx.fsx_projid != phc->projid) {
 132                 if (!phc->newline) {
 133                         printf("%s%c", pathname, '\0');
 134                         goto out;
 135                 }
 136                 printf("%s - project identifier is not set (inode=%u, tree=%u)\n",
 137                        pathname, fsx.fsx_projid, phc->projid);
 138         }
 139 out:
 140         close(ret);
 141         return 0;
 142 }
 143
 144 static int
 145 project_list_one(const char *pathname, struct project_handle_control *phc)
 146 {
 147         struct fsxattr fsx;
 148         int ret;
 149
 150         ret = project_get_xattr(pathname, &fsx);
 151         if (ret < 0)
 152                 return ret;
 153
 154         printf("%5u %c %s\n", fsx.fsx_projid,
 155                (fsx.fsx_xflags & LL_PROJINHERIT_FL) ?
 156                 'P' : '-', pathname);
 157
 158         close(ret);
 159         return 0;
 160 }
 161
 162 static int
 163 project_set_one(const char *pathname, struct project_handle_control *phc)
 164 {
 165         struct fsxattr fsx;
 166         int fd, ret = 0;
 167
 168         fd = project_get_xattr(pathname, &fsx);
 169         if (fd < 0)
 170                 return fd;
 171
 172         if ((!phc->set_projid || fsx.fsx_projid == phc->projid) &&
 173             (!phc->set_inherit || (fsx.fsx_xflags & LL_PROJINHERIT_FL)))
 174                 goto out;
 175
 176         if (phc->set_inherit)
 177                 fsx.fsx_xflags |= LL_PROJINHERIT_FL;
 178         if (phc->set_projid)
 179                 fsx.fsx_projid = phc->projid;
 180
 181         ret = ioctl(fd, LL_IOC_FSSETXATTR, &fsx);
 182         if (ret)
 183                 fprintf(stderr, "%s: failed to set xattr for '%s': %s\n",
 184                         progname, pathname, strerror(errno));
 185 out:
 186         close(fd);
 187         return ret;
 188 }
 189
 190 static int
 191 project_clear_one(const char *pathname, struct project_handle_control *phc)
 192 {
 193         struct fsxattr fsx;
 194         int ret = 0, fd;
 195
 196         fd = project_get_xattr(pathname, &fsx);
 197         if (fd < 0)
 198                 return fd;
 199
 200         if ((!(fsx.fsx_xflags & LL_PROJINHERIT_FL)) &&
 201              (fsx.fsx_projid == 0 || phc->keep_projid))
 202                 goto out;
 203
 204         fsx.fsx_xflags &= ~LL_PROJINHERIT_FL;
 205         if (!phc->keep_projid)
 206                 fsx.fsx_projid = 0;
 207
 208         ret = ioctl(fd, LL_IOC_FSSETXATTR, &fsx);
 209         if (ret)
 210                 fprintf(stderr, "%s: failed to set xattr for '%s': %s\n",
 211                         progname, pathname, strerror(errno));
 212 out:
 213         close(fd);
 214         return ret;
 215 }
 216
 217 static int
 218 lfs_project_handle_dir(struct list_head *head, const char *pathname,
 219                        struct project_handle_control *phc,
 220                        int (*func)(const char *,
 221                                    struct project_handle_control *))
 222 {
 223         char fullname[PATH_MAX];
 224         struct dirent *ent;
 225         DIR *dir;
 226         int ret = 0;
 227
 228         dir = opendir(pathname);
 229         if (dir == NULL) {
 230                 ret = -errno;
 231                 fprintf(stderr, "%s: failed to opendir '%s': %s\n",
 232                         progname, pathname, strerror(-ret));
 233                 return ret;
 234         }
 235
 236         while (ret == 0 && (ent = readdir(dir)) != NULL) {
 237                 /* skip "." and ".." */
 238                 if (strcmp(ent->d_name, ".") == 0 ||
 239                     strcmp(ent->d_name, "..") == 0)
 240                         continue;
 241
 242                 if (strlen(ent->d_name) + strlen(pathname) >=
 243                     sizeof(fullname) + 1) {
 244                         ret = -ENAMETOOLONG;
 245                         errno = ENAMETOOLONG;
 246                         break;
 247                 }
 248                 snprintf(fullname, PATH_MAX, "%s/%s", pathname,
 249                          ent->d_name);
 250
 251                 ret = func(fullname, phc);
 252                 if (phc->recursive && ret == 0 && ent->d_type == DT_DIR)
 253                         ret = lfs_project_item_alloc(head, fullname);
 254         }
 255
 256         if (ret)
 257                 fprintf(stderr, "%s: failed to handle dir '%s': %s\n",
 258                         progname, pathname, strerror(errno));
 259
 260         closedir(dir);
 261         return ret;
 262 }
 263
 264 static int lfs_project_iterate(const char *pathname,
 265                                struct project_handle_control *phc,
 266                                int (*func)(const char *,
 267                                            struct project_handle_control *))
 268 {
 269         struct lfs_project_item *lpi;
 270         struct list_head head;
 271         struct stat st;
 272         int ret = 0;
 273         bool top_dir = true;
 274
 275         ret = stat(pathname, &st);
 276         if (ret) {
 277                 fprintf(stderr, "%s: failed to stat '%s': %s\n",
 278                         progname, pathname, strerror(errno));
 279                 return ret;
 280         }
 281
 282         /* list opeation will skip top directory in default */
 283         if (!S_ISDIR(st.st_mode) || phc->dironly ||
 284             project_list_one != func)
 285                 ret = func(pathname, phc);
 286
 287         /* dironly first, recursive will be ignored */
 288         if (!S_ISDIR(st.st_mode) || phc->dironly || ret)
 289                 return ret;
 290
 291         INIT_LIST_HEAD(&head);
 292         ret = lfs_project_item_alloc(&head, pathname);
 293         if (ret)
 294                 return ret;
 295
 296         while (!list_empty(&head)) {
 297                 lpi = list_entry(head.next, struct lfs_project_item, lpi_list);
 298                 list_del(&lpi->lpi_list);
 299                 if (ret == 0) {
 300                         ret = lfs_project_handle_dir(&head, lpi->lpi_pathname,
 301                                                      phc, func);
 302                         /* only ignore ENOENT error if this is
 303                          * not top directory. */
 304                         if (ret == -ENOENT && !top_dir)
 305                                 ret = 0;
 306                 }
 307                 free(lpi);
 308                 top_dir = false;
 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 }