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, | |
476c006b JB |
35 | Opt_acl, |
36 | Opt_noacl, | |
37 | Opt_quota_off, | |
38 | Opt_quota_account, | |
39 | Opt_quota_on, | |
40 | Opt_suiddir, | |
41 | Opt_nosuiddir, | |
42 | Opt_data_writeback, | |
43 | Opt_data_ordered, | |
9b8df98f | 44 | Opt_meta, |
9a5ad138 | 45 | Opt_err, |
476c006b JB |
46 | }; |
47 | ||
a447c093 | 48 | static const match_table_t tokens = { |
476c006b JB |
49 | {Opt_lockproto, "lockproto=%s"}, |
50 | {Opt_locktable, "locktable=%s"}, | |
51 | {Opt_hostdata, "hostdata=%s"}, | |
52 | {Opt_spectator, "spectator"}, | |
53 | {Opt_ignore_local_fs, "ignore_local_fs"}, | |
54 | {Opt_localflocks, "localflocks"}, | |
55 | {Opt_localcaching, "localcaching"}, | |
56 | {Opt_debug, "debug"}, | |
57 | {Opt_nodebug, "nodebug"}, | |
58 | {Opt_upgrade, "upgrade"}, | |
476c006b JB |
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"}, | |
9a5ad138 | 67 | {Opt_data_ordered, "data=ordered"}, |
9b8df98f | 68 | {Opt_meta, "meta"}, |
9a5ad138 | 69 | {Opt_err, NULL} |
476c006b JB |
70 | }; |
71 | ||
b3b94faa DT |
72 | /** |
73 | * gfs2_mount_args - Parse mount options | |
74 | * @sdp: | |
75 | * @data: | |
76 | * | |
77 | * Return: errno | |
78 | */ | |
79 | ||
80 | int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount) | |
81 | { | |
82 | struct gfs2_args *args = &sdp->sd_args; | |
83 | char *data = data_arg; | |
84 | char *options, *o, *v; | |
85 | int error = 0; | |
86 | ||
d18c4d68 SW |
87 | if (!remount) { |
88 | /* If someone preloaded options, use those instead */ | |
89 | spin_lock(&gfs2_sys_margs_lock); | |
90 | if (gfs2_sys_margs) { | |
91 | data = gfs2_sys_margs; | |
92 | gfs2_sys_margs = NULL; | |
93 | } | |
94 | spin_unlock(&gfs2_sys_margs_lock); | |
569a7b6c | 95 | |
d18c4d68 | 96 | /* Set some defaults */ |
d18c4d68 SW |
97 | args->ar_quota = GFS2_QUOTA_DEFAULT; |
98 | args->ar_data = GFS2_DATA_DEFAULT; | |
99 | } | |
b3b94faa DT |
100 | |
101 | /* Split the options into tokens with the "," character and | |
102 | process them */ | |
103 | ||
104 | for (options = data; (o = strsep(&options, ",")); ) { | |
97cc1025 | 105 | int token; |
476c006b JB |
106 | substring_t tmp[MAX_OPT_ARGS]; |
107 | ||
b3b94faa DT |
108 | if (!*o) |
109 | continue; | |
110 | ||
476c006b JB |
111 | token = match_token(o, tokens, tmp); |
112 | switch (token) { | |
113 | case Opt_lockproto: | |
114 | v = match_strdup(&tmp[0]); | |
115 | if (!v) { | |
116 | fs_info(sdp, "no memory for lockproto\n"); | |
117 | error = -ENOMEM; | |
118 | goto out_error; | |
119 | } | |
b3b94faa | 120 | |
476c006b JB |
121 | if (remount && strcmp(v, args->ar_lockproto)) { |
122 | kfree(v); | |
b3b94faa | 123 | goto cant_remount; |
476c006b JB |
124 | } |
125 | ||
b3b94faa DT |
126 | strncpy(args->ar_lockproto, v, GFS2_LOCKNAME_LEN); |
127 | args->ar_lockproto[GFS2_LOCKNAME_LEN - 1] = 0; | |
476c006b JB |
128 | kfree(v); |
129 | break; | |
130 | case Opt_locktable: | |
131 | v = match_strdup(&tmp[0]); | |
132 | if (!v) { | |
133 | fs_info(sdp, "no memory for locktable\n"); | |
134 | error = -ENOMEM; | |
135 | goto out_error; | |
136 | } | |
b3b94faa | 137 | |
476c006b JB |
138 | if (remount && strcmp(v, args->ar_locktable)) { |
139 | kfree(v); | |
b3b94faa | 140 | goto cant_remount; |
476c006b JB |
141 | } |
142 | ||
b3b94faa | 143 | strncpy(args->ar_locktable, v, GFS2_LOCKNAME_LEN); |
476c006b JB |
144 | args->ar_locktable[GFS2_LOCKNAME_LEN - 1] = 0; |
145 | kfree(v); | |
146 | break; | |
147 | case Opt_hostdata: | |
148 | v = match_strdup(&tmp[0]); | |
149 | if (!v) { | |
150 | fs_info(sdp, "no memory for hostdata\n"); | |
151 | error = -ENOMEM; | |
152 | goto out_error; | |
153 | } | |
b3b94faa | 154 | |
476c006b JB |
155 | if (remount && strcmp(v, args->ar_hostdata)) { |
156 | kfree(v); | |
b3b94faa | 157 | goto cant_remount; |
476c006b JB |
158 | } |
159 | ||
b3b94faa DT |
160 | strncpy(args->ar_hostdata, v, GFS2_LOCKNAME_LEN); |
161 | args->ar_hostdata[GFS2_LOCKNAME_LEN - 1] = 0; | |
476c006b JB |
162 | kfree(v); |
163 | break; | |
164 | case Opt_spectator: | |
b3b94faa DT |
165 | if (remount && !args->ar_spectator) |
166 | goto cant_remount; | |
167 | args->ar_spectator = 1; | |
168 | sdp->sd_vfs->s_flags |= MS_RDONLY; | |
476c006b JB |
169 | break; |
170 | case Opt_ignore_local_fs: | |
b3b94faa DT |
171 | if (remount && !args->ar_ignore_local_fs) |
172 | goto cant_remount; | |
173 | args->ar_ignore_local_fs = 1; | |
476c006b JB |
174 | break; |
175 | case Opt_localflocks: | |
b3b94faa DT |
176 | if (remount && !args->ar_localflocks) |
177 | goto cant_remount; | |
178 | args->ar_localflocks = 1; | |
476c006b JB |
179 | break; |
180 | case Opt_localcaching: | |
b3b94faa DT |
181 | if (remount && !args->ar_localcaching) |
182 | goto cant_remount; | |
183 | args->ar_localcaching = 1; | |
476c006b JB |
184 | break; |
185 | case Opt_debug: | |
b3b94faa | 186 | args->ar_debug = 1; |
476c006b JB |
187 | break; |
188 | case Opt_nodebug: | |
b3b94faa | 189 | args->ar_debug = 0; |
476c006b JB |
190 | break; |
191 | case Opt_upgrade: | |
b3b94faa DT |
192 | if (remount && !args->ar_upgrade) |
193 | goto cant_remount; | |
194 | args->ar_upgrade = 1; | |
476c006b | 195 | break; |
476c006b | 196 | case Opt_acl: |
b3b94faa DT |
197 | args->ar_posix_acl = 1; |
198 | sdp->sd_vfs->s_flags |= MS_POSIXACL; | |
476c006b JB |
199 | break; |
200 | case Opt_noacl: | |
b3b94faa DT |
201 | args->ar_posix_acl = 0; |
202 | sdp->sd_vfs->s_flags &= ~MS_POSIXACL; | |
476c006b JB |
203 | break; |
204 | case Opt_quota_off: | |
205 | args->ar_quota = GFS2_QUOTA_OFF; | |
206 | break; | |
207 | case Opt_quota_account: | |
208 | args->ar_quota = GFS2_QUOTA_ACCOUNT; | |
209 | break; | |
210 | case Opt_quota_on: | |
211 | args->ar_quota = GFS2_QUOTA_ON; | |
212 | break; | |
213 | case Opt_suiddir: | |
b3b94faa | 214 | args->ar_suiddir = 1; |
476c006b JB |
215 | break; |
216 | case Opt_nosuiddir: | |
b3b94faa | 217 | args->ar_suiddir = 0; |
476c006b JB |
218 | break; |
219 | case Opt_data_writeback: | |
220 | args->ar_data = GFS2_DATA_WRITEBACK; | |
221 | break; | |
222 | case Opt_data_ordered: | |
223 | args->ar_data = GFS2_DATA_ORDERED; | |
224 | break; | |
9b8df98f SW |
225 | case Opt_meta: |
226 | if (remount && args->ar_meta != 1) | |
227 | goto cant_remount; | |
228 | args->ar_meta = 1; | |
229 | break; | |
9a5ad138 | 230 | case Opt_err: |
476c006b | 231 | default: |
b3b94faa DT |
232 | fs_info(sdp, "unknown option: %s\n", o); |
233 | error = -EINVAL; | |
476c006b | 234 | goto out_error; |
b3b94faa DT |
235 | } |
236 | } | |
237 | ||
476c006b | 238 | out_error: |
b3b94faa DT |
239 | if (error) |
240 | fs_info(sdp, "invalid mount option(s)\n"); | |
241 | ||
242 | if (data != data_arg) | |
243 | kfree(data); | |
244 | ||
245 | return error; | |
246 | ||
a91ea69f | 247 | cant_remount: |
b3b94faa DT |
248 | fs_info(sdp, "can't remount with option %s\n", o); |
249 | return -EINVAL; | |
250 | } | |
251 |