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1 | /* | |
2 | * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. | |
3 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. | |
4 | * | |
5 | * This file is part of LVM2. | |
6 | * | |
7 | * This copyrighted material is made available to anyone wishing to use, | |
8 | * modify, copy, or redistribute it subject to the terms and conditions | |
9 | * of the GNU Lesser General Public License v.2.1. | |
10 | * | |
11 | * You should have received a copy of the GNU Lesser General Public License | |
12 | * along with this program; if not, write to the Free Software Foundation, | |
13 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
14 | */ | |
15 | ||
16 | #include "tools.h" | |
17 | ||
18 | struct lvrename_params { | |
19 | int historical; | |
20 | const char *lv_name_old; | |
21 | const char *lv_name_new; | |
22 | }; | |
23 | ||
24 | /* | |
25 | * Dummy LV to represent historical LV. | |
26 | */ | |
27 | static struct logical_volume _historical_lv = { | |
28 | .name = "", | |
29 | .major = -1, | |
30 | .minor = -1, | |
31 | .snapshot_segs = DM_LIST_HEAD_INIT(_historical_lv.snapshot_segs), | |
32 | .segments = DM_LIST_HEAD_INIT(_historical_lv.segments), | |
33 | .tags = DM_LIST_HEAD_INIT(_historical_lv.tags), | |
34 | .segs_using_this_lv = DM_LIST_HEAD_INIT(_historical_lv.segs_using_this_lv), | |
35 | .indirect_glvs = DM_LIST_HEAD_INIT(_historical_lv.indirect_glvs), | |
36 | .hostname = "", | |
37 | }; | |
38 | ||
39 | static int _lvrename_single(struct cmd_context *cmd, const char *vg_name, | |
40 | struct volume_group *vg, struct processing_handle *handle) | |
41 | { | |
42 | struct lvrename_params *lp = (struct lvrename_params *) handle->custom_handle; | |
43 | struct generic_logical_volume *glv; | |
44 | struct logical_volume *lv; | |
45 | int ret = ECMD_FAILED; | |
46 | ||
47 | if (!lp->historical) { | |
48 | if (!(lv = find_lv(vg, lp->lv_name_old))) { | |
49 | log_error("Existing logical volume \"%s\" not found in " | |
50 | "volume group \"%s\"", lp->lv_name_old, vg_name); | |
51 | goto bad; | |
52 | } | |
53 | ||
54 | if (lv_is_raid_image(lv) || lv_is_raid_metadata(lv)) { | |
55 | log_error("Cannot rename a RAID %s directly", | |
56 | lv_is_raid_image(lv) ? "image" : | |
57 | "metadata area"); | |
58 | goto bad; | |
59 | } | |
60 | ||
61 | if (lv_is_raid_with_tracking(lv)) { | |
62 | log_error("Cannot rename %s while it is tracking a split image", | |
63 | lv->name); | |
64 | goto bad; | |
65 | } | |
66 | } else { | |
67 | if (!(glv = find_historical_glv(vg, lp->lv_name_old, 0, NULL))) { | |
68 | log_error("Existing historical logical volume \"%s\" not found in " | |
69 | "volume group \"%s\"", lp->lv_name_old, vg_name); | |
70 | goto bad; | |
71 | } | |
72 | ||
73 | _historical_lv.vg = vg; | |
74 | _historical_lv.name = lp->lv_name_old; | |
75 | _historical_lv.this_glv = glv; | |
76 | lv = &_historical_lv; | |
77 | } | |
78 | ||
79 | /* | |
80 | * The lvmlockd LV lock is only acquired here to ensure the LV is not | |
81 | * active on another host. This requests a transient LV lock. | |
82 | * If the LV is active, a persistent LV lock already exists in | |
83 | * lvmlockd, and the transient lock request does nothing. | |
84 | * If the LV is not active, then no LV lock exists and the transient | |
85 | * lock request acquires the LV lock (or fails). The transient lock | |
86 | * is automatically released when the command exits. | |
87 | */ | |
88 | if (!lockd_lv(cmd, lv, "ex", 0)) | |
89 | goto_bad; | |
90 | ||
91 | if (!lv_rename(cmd, lv, lp->lv_name_new)) | |
92 | goto_bad; | |
93 | ||
94 | log_print_unless_silent("Renamed \"%s%s\" to \"%s%s\" in volume group \"%s\"", | |
95 | lp->historical ? HISTORICAL_LV_PREFIX : "", lp->lv_name_old, | |
96 | lp->historical ? HISTORICAL_LV_PREFIX : "", lp->lv_name_new, | |
97 | vg_name); | |
98 | ||
99 | ret = ECMD_PROCESSED; | |
100 | bad: | |
101 | return ret; | |
102 | } | |
103 | ||
104 | /* | |
105 | * lvrename command implementation. | |
106 | * Check arguments and call lv_rename() to execute the request. | |
107 | */ | |
108 | int lvrename(struct cmd_context *cmd, int argc, char **argv) | |
109 | { | |
110 | struct processing_handle *handle = NULL; | |
111 | struct lvrename_params lp = { 0 }; | |
112 | size_t maxlen; | |
113 | char *lv_name_old, *lv_name_new; | |
114 | const char *vg_name, *vg_name_new, *vg_name_old; | |
115 | int historical = 0; | |
116 | char *st; | |
117 | int ret; | |
118 | ||
119 | cmd->include_historical_lvs = 1; | |
120 | ||
121 | if (argc == 3) { | |
122 | vg_name = skip_dev_dir(cmd, argv[0], NULL); | |
123 | lv_name_old = argv[1]; | |
124 | lv_name_new = argv[2]; | |
125 | if (strchr(lv_name_old, '/') && | |
126 | (vg_name_old = extract_vgname(cmd, lv_name_old)) && | |
127 | strcmp(vg_name_old, vg_name)) { | |
128 | log_error("Please use a single volume group name " | |
129 | "(\"%s\" or \"%s\")", vg_name, vg_name_old); | |
130 | return EINVALID_CMD_LINE; | |
131 | } | |
132 | } else if (argc == 2) { | |
133 | lv_name_old = argv[0]; | |
134 | lv_name_new = argv[1]; | |
135 | vg_name = extract_vgname(cmd, lv_name_old); | |
136 | } else { | |
137 | log_error("Old and new logical volume names required"); | |
138 | return EINVALID_CMD_LINE; | |
139 | } | |
140 | ||
141 | if (!validate_name(vg_name)) { | |
142 | log_error("Please provide a valid volume group name"); | |
143 | return EINVALID_CMD_LINE; | |
144 | } | |
145 | ||
146 | if (strchr(lv_name_new, '/') && | |
147 | (vg_name_new = extract_vgname(cmd, lv_name_new)) && | |
148 | strcmp(vg_name, vg_name_new)) { | |
149 | log_error("Logical volume names must " | |
150 | "have the same volume group (\"%s\" or \"%s\")", | |
151 | vg_name, vg_name_new); | |
152 | return EINVALID_CMD_LINE; | |
153 | } | |
154 | ||
155 | if ((st = strrchr(lv_name_old, '/'))) | |
156 | lv_name_old = st + 1; | |
157 | ||
158 | if ((st = strrchr(lv_name_new, '/'))) | |
159 | lv_name_new = st + 1; | |
160 | ||
161 | if (!strncmp(lv_name_old, HISTORICAL_LV_PREFIX, strlen(HISTORICAL_LV_PREFIX))) { | |
162 | lv_name_old = lv_name_old + strlen(HISTORICAL_LV_PREFIX); | |
163 | historical = 1; | |
164 | } | |
165 | ||
166 | if (!strncmp(lv_name_new, HISTORICAL_LV_PREFIX, strlen(HISTORICAL_LV_PREFIX))) { | |
167 | if (historical) | |
168 | lv_name_new = lv_name_old + strlen(HISTORICAL_LV_PREFIX); | |
169 | else { | |
170 | log_error("Old name references live LV while " | |
171 | "new name is for historical LV."); | |
172 | return EINVALID_CMD_LINE; | |
173 | } | |
174 | } | |
175 | ||
176 | /* Check sanity of new name */ | |
177 | maxlen = NAME_LEN - strlen(vg_name) - 3; | |
178 | if (strlen(lv_name_new) > maxlen) { | |
179 | log_error("New logical volume name \"%s\" may not exceed %" | |
180 | PRIsize_t " characters.", lv_name_new, maxlen); | |
181 | return EINVALID_CMD_LINE; | |
182 | } | |
183 | ||
184 | if (!*lv_name_new) { | |
185 | log_error("New logical volume name may not be blank"); | |
186 | return EINVALID_CMD_LINE; | |
187 | } | |
188 | ||
189 | if (!apply_lvname_restrictions(lv_name_new)) { | |
190 | stack; | |
191 | return EINVALID_CMD_LINE; | |
192 | } | |
193 | ||
194 | if (!validate_name(lv_name_new)) { | |
195 | log_error("New logical volume name \"%s\" is invalid", | |
196 | lv_name_new); | |
197 | return EINVALID_CMD_LINE; | |
198 | } | |
199 | ||
200 | if (!strcmp(lv_name_old, lv_name_new)) { | |
201 | log_error("Old and new logical volume names must differ"); | |
202 | return EINVALID_CMD_LINE; | |
203 | } | |
204 | ||
205 | lp.historical = historical; | |
206 | ||
207 | if (!(lp.lv_name_old = dm_pool_strdup(cmd->mem, lv_name_old))) | |
208 | return ECMD_FAILED; | |
209 | ||
210 | if (!(lp.lv_name_new = dm_pool_strdup(cmd->mem, lv_name_new))) | |
211 | return ECMD_FAILED; | |
212 | ||
213 | if (!(handle = init_processing_handle(cmd, NULL))) { | |
214 | log_error("Failed to initialize processing handle."); | |
215 | return ECMD_FAILED; | |
216 | } | |
217 | ||
218 | handle->custom_handle = &lp; | |
219 | ||
220 | ret = process_each_vg(cmd, 0, NULL, vg_name, NULL, READ_FOR_UPDATE, 0, handle, | |
221 | _lvrename_single); | |
222 | ||
223 | destroy_processing_handle(cmd, handle); | |
224 | ||
225 | return ret; | |
226 | } |