Btrfs-progs: fix closing of opendir()
[platform/upstream/btrfs-progs.git] / cmds-quota.c
1 /*
2  * Copyright (C) 2012 STRATO.  All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public
6  * License v2 as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11  * General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public
14  * License along with this program; if not, write to the
15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16  * Boston, MA 021110-1307, USA.
17  */
18
19 #include <sys/ioctl.h>
20 #include <unistd.h>
21
22 #include "ctree.h"
23 #include "ioctl.h"
24
25 #include "commands.h"
26 #include "utils.h"
27
28 static const char * const quota_cmd_group_usage[] = {
29         "btrfs quota <command> [options] <path>",
30         NULL
31 };
32
33 int quota_ctl(int cmd, int argc, char **argv)
34 {
35         int ret = 0;
36         int fd;
37         int e;
38         char *path = argv[1];
39         struct btrfs_ioctl_quota_ctl_args args;
40         DIR *dirstream = NULL;
41
42         if (check_argc_exact(argc, 2))
43                 return -1;
44
45         memset(&args, 0, sizeof(args));
46         args.cmd = cmd;
47
48         fd = open_file_or_dir(path, &dirstream);
49         if (fd < 0) {
50                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
51                 return 12;
52         }
53
54         ret = ioctl(fd, BTRFS_IOC_QUOTA_CTL, &args);
55         e = errno;
56         close_file_or_dir(fd, dirstream);
57         if (ret < 0) {
58                 fprintf(stderr, "ERROR: quota command failed: %s\n",
59                         strerror(e));
60                 return 30;
61         }
62         return 0;
63 }
64
65 static const char * const cmd_quota_enable_usage[] = {
66         "btrfs quota enable <path>",
67         "Enable subvolume quota support for a filesystem.",
68         "Any data already present on the filesystem will not count towards",
69         "the space usage numbers. It is recommended to enable quota for a",
70         "filesystem before writing any data to it.",
71         NULL
72 };
73
74 static int cmd_quota_enable(int argc, char **argv)
75 {
76         int ret = quota_ctl(BTRFS_QUOTA_CTL_ENABLE, argc, argv);
77         if (ret < 0)
78                 usage(cmd_quota_enable_usage);
79         return ret;
80 }
81
82 static const char * const cmd_quota_disable_usage[] = {
83         "btrfs quota disable <path>",
84         "Disable subvolume quota support for a filesystem.",
85         NULL
86 };
87
88 static int cmd_quota_disable(int argc, char **argv)
89 {
90         int ret = quota_ctl(BTRFS_QUOTA_CTL_DISABLE, argc, argv);
91         if (ret < 0)
92                 usage(cmd_quota_disable_usage);
93         return ret;
94 }
95
96 static const char * const cmd_quota_rescan_usage[] = {
97         "btrfs quota rescan [-s] <path>",
98         "Trash all qgroup numbers and scan the metadata again with the current config.",
99         "",
100         "-s   show status of a running rescan operation",
101         NULL
102 };
103
104 static int cmd_quota_rescan(int argc, char **argv)
105 {
106         int ret = 0;
107         int fd;
108         int e;
109         char *path = NULL;
110         struct btrfs_ioctl_quota_rescan_args args;
111         int ioctlnum = BTRFS_IOC_QUOTA_RESCAN;
112         DIR *dirstream = NULL;
113
114         optind = 1;
115         while (1) {
116                 int c = getopt(argc, argv, "s");
117                 if (c < 0)
118                         break;
119                 switch (c) {
120                 case 's':
121                         ioctlnum = BTRFS_IOC_QUOTA_RESCAN_STATUS;
122                         break;
123                 default:
124                         usage(cmd_quota_rescan_usage);
125                 }
126         }
127
128         if (check_argc_exact(argc - optind, 1))
129                 usage(cmd_quota_rescan_usage);
130
131         memset(&args, 0, sizeof(args));
132
133         path = argv[optind];
134         fd = open_file_or_dir(path, &dirstream);
135         if (fd < 0) {
136                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
137                 return 12;
138         }
139
140         ret = ioctl(fd, ioctlnum, &args);
141         e = errno;
142         close_file_or_dir(fd, dirstream);
143
144         if (ioctlnum == BTRFS_IOC_QUOTA_RESCAN) {
145                 if (ret < 0) {
146                         fprintf(stderr, "ERROR: quota rescan failed: "
147                                 "%s\n", strerror(e));
148                         return 30;
149                 }  else {
150                         printf("quota rescan started\n");
151                 }
152         } else {
153                 if (!args.flags) {
154                         printf("no rescan operation in progress\n");
155                 } else {
156                         printf("rescan operation running (current key %lld)\n",
157                                 args.progress);
158                 }
159         }
160
161         return 0;
162 }
163
164 const struct cmd_group quota_cmd_group = {
165         quota_cmd_group_usage, NULL, {
166                 { "enable", cmd_quota_enable, cmd_quota_enable_usage, NULL, 0 },
167                 { "disable", cmd_quota_disable, cmd_quota_disable_usage, 0, 0 },
168                 { "rescan", cmd_quota_rescan, cmd_quota_rescan_usage, NULL, 0 },
169                 { 0, 0, 0, 0, 0 }
170         }
171 };
172
173 int cmd_quota(int argc, char **argv)
174 {
175         return handle_command_group(&quota_cmd_group, argc, argv);
176 }