debugfs/quota.c

   1 /*
   2  * quota.c --- debugfs quota commands
   3  *
   4  * Copyright (C) 2014 Theodore Ts'o.  This file may be redistributed
   5  * under the terms of the GNU Public License.
   6  */
   7
   8 #include "config.h"
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <ctype.h>
  13 #include <string.h>
  14 #include <time.h>
  15 #ifdef HAVE_ERRNO_H
  16 #include <errno.h>
  17 #endif
  18 #include <sys/types.h>
  19 #ifdef HAVE_GETOPT_H
  20 #include <getopt.h>
  21 #else
  22 extern int optind;
  23 extern char *optarg;
  24 #endif
  25
  26 #include "debugfs.h"
  27
  28 const char *quota_type[] = { "user", "group", NULL };
  29
  30 static int load_quota_ctx(char *progname)
  31 {
  32         errcode_t       retval;
  33
  34         if (check_fs_open(progname))
  35                 return 1;
  36
  37         if (!EXT2_HAS_RO_COMPAT_FEATURE(current_fs->super,
  38                                         EXT4_FEATURE_RO_COMPAT_QUOTA)) {
  39                 com_err(progname, 0, "quota feature not enabled");
  40                 return 1;
  41         }
  42
  43         if (current_qctx)
  44                 return 0;
  45
  46         retval = quota_init_context(&current_qctx, current_fs, -1);
  47         if (retval) {
  48                 com_err(current_fs->device_name, retval,
  49                         "while trying to load quota information");
  50                 return 1;
  51         }
  52         return 0;
  53 }
  54
  55 static int parse_quota_type(const char *cmdname, const char *str)
  56 {
  57         errcode_t       retval;
  58         char            *t;
  59         int             flags = 0;
  60         int             i;
  61
  62         for (i = 0; i < MAXQUOTAS; i++) {
  63                 if (strcasecmp(str, quota_type[i]) == 0)
  64                         break;
  65         }
  66         if (i >= MAXQUOTAS) {
  67                 i = strtol(str, &t, 0);
  68                 if (*t)
  69                         i = -1;
  70         }
  71         if (i < 0 || i >= MAXQUOTAS) {
  72                 com_err(0, 0, "Invalid quota type: %s", str);
  73                 printf("Valid quota types are: ");
  74                 for (i = 0; i < MAXQUOTAS; i++)
  75                         printf("%s ", quota_type[i]);
  76                 printf("\n");
  77                 return -1;
  78         }
  79
  80         if (current_fs->flags & EXT2_FLAG_RW)
  81                 flags |= EXT2_FILE_WRITE;
  82
  83         retval = quota_file_open(current_qctx, NULL, 0, i, -1, flags);
  84         if (retval) {
  85                 com_err(cmdname, retval,
  86                         "while opening quota inode (type %d)", i);
  87                 return -1;
  88         }
  89         return i;
  90 }
  91
  92
  93 static int list_quota_callback(struct dquot *dq, void *cb_data)
  94 {
  95         printf("%8u   %8lld %8lld %8lld    %8lld %8lld %8lld\n",
  96                dq->dq_id, (long long)dq->dq_dqb.dqb_curspace,
  97                (long long)dq->dq_dqb.dqb_bsoftlimit,
  98                (long long)dq->dq_dqb.dqb_bhardlimit,
  99                (long long)dq->dq_dqb.dqb_curinodes,
 100                (long long)dq->dq_dqb.dqb_isoftlimit,
 101                (long long)dq->dq_dqb.dqb_ihardlimit);
 102         return 0;
 103 }
 104
 105 void do_list_quota(int argc, char *argv[])
 106 {
 107         errcode_t       retval;
 108         int             type;
 109         struct quota_handle *qh;
 110
 111         if (load_quota_ctx(argv[0]))
 112                 return;
 113
 114         if (argc != 2) {
 115                 com_err(0, 0, "Usage: list_quota <quota_type>\n");
 116                 return;
 117         }
 118
 119         type = parse_quota_type(argv[0], argv[1]);
 120         if (type < 0)
 121                 return;
 122
 123         printf("%8s   %8s %8s %8s    %8s %8s %8s\n",
 124                (type == 0) ? "user id" : "group id",
 125                "blocks", "quota", "limit", "inodes", "quota", "limit");
 126         qh = current_qctx->quota_file[type];
 127         retval = qh->qh_ops->scan_dquots(qh, list_quota_callback, NULL);
 128         if (retval) {
 129                 com_err(argv[0], retval, "while scanning dquots");
 130                 return;
 131         }
 132 }
 133
 134 void do_get_quota(int argc, char *argv[])
 135 {
 136         int             err, type;
 137         struct quota_handle *qh;
 138         struct dquot    *dq;
 139         qid_t           id;
 140
 141         if (load_quota_ctx(argv[0]))
 142                 return;
 143
 144         if (argc != 3) {
 145                 com_err(0, 0, "Usage: get_quota <quota_type> <id>\n");
 146                 return;
 147         }
 148
 149         type = parse_quota_type(argv[0], argv[1]);
 150         if (type < 0)
 151                 return;
 152
 153         id = parse_ulong(argv[2], argv[0], "id", &err);
 154         if (err)
 155                 return;
 156
 157         printf("%8s   %8s %8s %8s    %8s %8s %8s\n",
 158                (type == 0) ? "user id" : "group id",
 159                "blocks", "quota", "limit", "inodes", "quota", "limit");
 160
 161         qh = current_qctx->quota_file[type];
 162
 163         dq = qh->qh_ops->read_dquot(qh, id);
 164         if (dq) {
 165                 list_quota_callback(dq, NULL);
 166                 ext2fs_free_mem(&dq);
 167         } else {
 168                 com_err(argv[0], 0, "couldn't read quota record");
 169         }
 170 }