Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
5c676f6d | 14 | #include <linux/gfs2_ondisk.h> |
7d308590 | 15 | #include <linux/lm_interface.h> |
476c006b | 16 | #include <linux/parser.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
b3b94faa DT |
20 | #include "mount.h" |
21 | #include "sys.h" | |
5c676f6d | 22 | #include "util.h" |
b3b94faa | 23 | |
476c006b JB |
24 | enum { |
25 | Opt_lockproto, | |
26 | Opt_locktable, | |
27 | Opt_hostdata, | |
28 | Opt_spectator, | |
29 | Opt_ignore_local_fs, | |
30 | Opt_localflocks, | |
31 | Opt_localcaching, | |
32 | Opt_debug, | |
33 | Opt_nodebug, | |
34 | Opt_upgrade, | |
35 | Opt_num_glockd, | |
36 | Opt_acl, | |
37 | Opt_noacl, | |
38 | Opt_quota_off, | |
39 | Opt_quota_account, | |
40 | Opt_quota_on, | |
41 | Opt_suiddir, | |
42 | Opt_nosuiddir, | |
43 | Opt_data_writeback, | |
44 | Opt_data_ordered, | |
45 | }; | |
46 | ||
47 | static match_table_t tokens = { | |
48 | {Opt_lockproto, "lockproto=%s"}, | |
49 | {Opt_locktable, "locktable=%s"}, | |
50 | {Opt_hostdata, "hostdata=%s"}, | |
51 | {Opt_spectator, "spectator"}, | |
52 | {Opt_ignore_local_fs, "ignore_local_fs"}, | |
53 | {Opt_localflocks, "localflocks"}, | |
54 | {Opt_localcaching, "localcaching"}, | |
55 | {Opt_debug, "debug"}, | |
56 | {Opt_nodebug, "nodebug"}, | |
57 | {Opt_upgrade, "upgrade"}, | |
58 | {Opt_num_glockd, "num_glockd=%d"}, | |
59 | {Opt_acl, "acl"}, | |
60 | {Opt_noacl, "noacl"}, | |
61 | {Opt_quota_off, "quota=off"}, | |
62 | {Opt_quota_account, "quota=account"}, | |
63 | {Opt_quota_on, "quota=on"}, | |
64 | {Opt_suiddir, "suiddir"}, | |
65 | {Opt_nosuiddir, "nosuiddir"}, | |
66 | {Opt_data_writeback, "data=writeback"}, | |
67 | {Opt_data_ordered, "data=ordered"} | |
68 | }; | |
69 | ||
b3b94faa DT |
70 | /** |
71 | * gfs2_mount_args - Parse mount options | |
72 | * @sdp: | |
73 | * @data: | |
74 | * | |
75 | * Return: errno | |
76 | */ | |
77 | ||
78 | int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount) | |
79 | { | |
80 | struct gfs2_args *args = &sdp->sd_args; | |
81 | char *data = data_arg; | |
82 | char *options, *o, *v; | |
83 | int error = 0; | |
84 | ||
d18c4d68 SW |
85 | if (!remount) { |
86 | /* If someone preloaded options, use those instead */ | |
87 | spin_lock(&gfs2_sys_margs_lock); | |
88 | if (gfs2_sys_margs) { | |
89 | data = gfs2_sys_margs; | |
90 | gfs2_sys_margs = NULL; | |
91 | } | |
92 | spin_unlock(&gfs2_sys_margs_lock); | |
569a7b6c | 93 | |
d18c4d68 SW |
94 | /* Set some defaults */ |
95 | args->ar_num_glockd = GFS2_GLOCKD_DEFAULT; | |
96 | args->ar_quota = GFS2_QUOTA_DEFAULT; | |
97 | args->ar_data = GFS2_DATA_DEFAULT; | |
98 | } | |
b3b94faa DT |
99 | |
100 | /* Split the options into tokens with the "," character and | |
101 | process them */ | |
102 | ||
103 | for (options = data; (o = strsep(&options, ",")); ) { | |
476c006b JB |
104 | int token, option; |
105 | substring_t tmp[MAX_OPT_ARGS]; | |
106 | ||
b3b94faa DT |
107 | if (!*o) |
108 | continue; | |
109 | ||
476c006b JB |
110 | token = match_token(o, tokens, tmp); |
111 | switch (token) { | |
112 | case Opt_lockproto: | |
113 | v = match_strdup(&tmp[0]); | |
114 | if (!v) { | |
115 | fs_info(sdp, "no memory for lockproto\n"); | |
116 | error = -ENOMEM; | |
117 | goto out_error; | |
118 | } | |
b3b94faa | 119 | |
476c006b JB |
120 | if (remount && strcmp(v, args->ar_lockproto)) { |
121 | kfree(v); | |
b3b94faa | 122 | goto cant_remount; |
476c006b JB |
123 | } |
124 | ||
b3b94faa DT |
125 | strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN); |
126 | args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0; | |
476c006b JB |
127 | kfree(v); |
128 | break; | |
129 | case Opt_locktable: | |
130 | v = match_strdup(&tmp[0]); | |
131 | if (!v) { | |
132 | fs_info(sdp, "no memory for locktable\n"); | |
133 | error = -ENOMEM; | |
134 | goto out_error; | |
135 | } | |
b3b94faa | 136 | |
476c006b JB |
137 | if (remount && strcmp(v, args->ar_locktable)) { |
138 | kfree(v); | |
b3b94faa | 139 | goto cant_remount; |
476c006b JB |
140 | } |
141 | ||
b3b94faa | 142 | strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN); |
476c006b JB |
143 | args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0; |
144 | kfree(v); | |
145 | break; | |
146 | case Opt_hostdata: | |
147 | v = match_strdup(&tmp[0]); | |
148 | if (!v) { | |
149 | fs_info(sdp, "no memory for hostdata\n"); | |
150 | error = -ENOMEM; | |
151 | goto out_error; | |
152 | } | |
b3b94faa | 153 | |
476c006b JB |
154 | if (remount && strcmp(v, args->ar_hostdata)) { |
155 | kfree(v); | |
b3b94faa | 156 | goto cant_remount; |
476c006b JB |
157 | } |
158 | ||
b3b94faa DT |
159 | strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN); |
160 | args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0; | |
476c006b JB |
161 | kfree(v); |
162 | break; | |
163 | case Opt_spectator: | |
b3b94faa DT |
164 | if (remount && !args->ar_spectator) |
165 | goto cant_remount; | |
166 | args->ar_spectator = 1; | |
167 | sdp->sd_vfs->s_flags |= MS_RDONLY; | |
476c006b JB |
168 | break; |
169 | case Opt_ignore_local_fs: | |
b3b94faa DT |
170 | if (remount && !args->ar_ignore_local_fs) |
171 | goto cant_remount; | |
172 | args->ar_ignore_local_fs = 1; | |
476c006b JB |
173 | break; |
174 | case Opt_localflocks: | |
b3b94faa DT |
175 | if (remount && !args->ar_localflocks) |
176 | goto cant_remount; | |
177 | args->ar_localflocks = 1; | |
476c006b JB |
178 | break; |
179 | case Opt_localcaching: | |
b3b94faa DT |
180 | if (remount && !args->ar_localcaching) |
181 | goto cant_remount; | |
182 | args->ar_localcaching = 1; | |
476c006b JB |
183 | break; |
184 | case Opt_debug: | |
b3b94faa | 185 | args->ar_debug = 1; |
476c006b JB |
186 | break; |
187 | case Opt_nodebug: | |
b3b94faa | 188 | args->ar_debug = 0; |
476c006b JB |
189 | break; |
190 | case Opt_upgrade: | |
b3b94faa DT |
191 | if (remount && !args->ar_upgrade) |
192 | goto cant_remount; | |
193 | args->ar_upgrade = 1; | |
476c006b JB |
194 | break; |
195 | case Opt_num_glockd: | |
196 | if ((error = match_int(&tmp[0], &option))) { | |
197 | fs_info(sdp, "problem getting num_glockd\n"); | |
198 | goto out_error; | |
199 | } | |
b3b94faa | 200 | |
476c006b | 201 | if (remount && option != args->ar_num_glockd) |
b3b94faa | 202 | goto cant_remount; |
476c006b | 203 | if (!option || option > GFS2_GLOCKD_MAX) { |
b3b94faa | 204 | fs_info(sdp, "0 < num_glockd <= %u (not %u)\n", |
476c006b | 205 | GFS2_GLOCKD_MAX, option); |
b3b94faa | 206 | error = -EINVAL; |
476c006b | 207 | goto out_error; |
b3b94faa | 208 | } |
476c006b JB |
209 | args->ar_num_glockd = option; |
210 | break; | |
211 | case Opt_acl: | |
b3b94faa DT |
212 | args->ar_posix_acl = 1; |
213 | sdp->sd_vfs->s_flags |= MS_POSIXACL; | |
476c006b JB |
214 | break; |
215 | case Opt_noacl: | |
b3b94faa DT |
216 | args->ar_posix_acl = 0; |
217 | sdp->sd_vfs->s_flags &= ~MS_POSIXACL; | |
476c006b JB |
218 | break; |
219 | case Opt_quota_off: | |
220 | args->ar_quota = GFS2_QUOTA_OFF; | |
221 | break; | |
222 | case Opt_quota_account: | |
223 | args->ar_quota = GFS2_QUOTA_ACCOUNT; | |
224 | break; | |
225 | case Opt_quota_on: | |
226 | args->ar_quota = GFS2_QUOTA_ON; | |
227 | break; | |
228 | case Opt_suiddir: | |
b3b94faa | 229 | args->ar_suiddir = 1; |
476c006b JB |
230 | break; |
231 | case Opt_nosuiddir: | |
b3b94faa | 232 | args->ar_suiddir = 0; |
476c006b JB |
233 | break; |
234 | case Opt_data_writeback: | |
235 | args->ar_data = GFS2_DATA_WRITEBACK; | |
236 | break; | |
237 | case Opt_data_ordered: | |
238 | args->ar_data = GFS2_DATA_ORDERED; | |
239 | break; | |
240 | default: | |
b3b94faa DT |
241 | fs_info(sdp, "unknown option: %s\n", o); |
242 | error = -EINVAL; | |
476c006b | 243 | goto out_error; |
b3b94faa DT |
244 | } |
245 | } | |
246 | ||
476c006b | 247 | out_error: |
b3b94faa DT |
248 | if (error) |
249 | fs_info(sdp, "invalid mount option(s)\n"); | |
250 | ||
251 | if (data != data_arg) | |
252 | kfree(data); | |
253 | ||
254 | return error; | |
255 | ||
a91ea69f | 256 | cant_remount: |
b3b94faa DT |
257 | fs_info(sdp, "can't remount with option %s\n", o); |
258 | return -EINVAL; | |
259 | } | |
260 |