1 // SPDX-License-Identifier: GPL-2.0
3 #include "disk_groups.h"
4 #include "sb-members.h"
7 #include <linux/sort.h>
9 static int group_cmp(const void *_l, const void *_r)
11 const struct bch_disk_group *l = _l;
12 const struct bch_disk_group *r = _r;
14 return ((BCH_GROUP_DELETED(l) > BCH_GROUP_DELETED(r)) -
15 (BCH_GROUP_DELETED(l) < BCH_GROUP_DELETED(r))) ?:
16 ((BCH_GROUP_PARENT(l) > BCH_GROUP_PARENT(r)) -
17 (BCH_GROUP_PARENT(l) < BCH_GROUP_PARENT(r))) ?:
18 strncmp(l->label, r->label, sizeof(l->label));
21 static int bch2_sb_disk_groups_validate(struct bch_sb *sb,
22 struct bch_sb_field *f,
25 struct bch_sb_field_disk_groups *groups =
26 field_to_type(f, disk_groups);
27 struct bch_disk_group *g, *sorted = NULL;
28 unsigned nr_groups = disk_groups_nr(groups);
32 for (i = 0; i < sb->nr_devices; i++) {
33 struct bch_member m = bch2_sb_member_get(sb, i);
36 if (!BCH_MEMBER_GROUP(&m))
39 group_id = BCH_MEMBER_GROUP(&m) - 1;
41 if (group_id >= nr_groups) {
42 prt_printf(err, "disk %u has invalid label %u (have %u)",
43 i, group_id, nr_groups);
44 return -BCH_ERR_invalid_sb_disk_groups;
47 if (BCH_GROUP_DELETED(&groups->entries[group_id])) {
48 prt_printf(err, "disk %u has deleted label %u", i, group_id);
49 return -BCH_ERR_invalid_sb_disk_groups;
56 for (i = 0; i < nr_groups; i++) {
57 g = groups->entries + i;
59 if (BCH_GROUP_DELETED(g))
62 len = strnlen(g->label, sizeof(g->label));
64 prt_printf(err, "label %u empty", i);
65 return -BCH_ERR_invalid_sb_disk_groups;
69 sorted = kmalloc_array(nr_groups, sizeof(*sorted), GFP_KERNEL);
71 return -BCH_ERR_ENOMEM_disk_groups_validate;
73 memcpy(sorted, groups->entries, nr_groups * sizeof(*sorted));
74 sort(sorted, nr_groups, sizeof(*sorted), group_cmp, NULL);
76 for (g = sorted; g + 1 < sorted + nr_groups; g++)
77 if (!BCH_GROUP_DELETED(g) &&
78 !group_cmp(&g[0], &g[1])) {
79 prt_printf(err, "duplicate label %llu.%.*s",
81 (int) sizeof(g->label), g->label);
82 ret = -BCH_ERR_invalid_sb_disk_groups;
90 void bch2_disk_groups_to_text(struct printbuf *out, struct bch_fs *c)
92 struct bch_disk_groups_cpu *g;
100 g = rcu_dereference(c->disk_groups);
104 for (i = 0; i < g->nr; i++) {
106 prt_printf(out, " ");
108 if (g->entries[i].deleted) {
109 prt_printf(out, "[deleted]");
113 prt_printf(out, "[parent %d devs", g->entries[i].parent);
114 for_each_member_device_rcu(ca, c, iter, &g->entries[i].devs)
115 prt_printf(out, " %s", ca->name);
116 prt_printf(out, "]");
124 static void bch2_sb_disk_groups_to_text(struct printbuf *out,
126 struct bch_sb_field *f)
128 struct bch_sb_field_disk_groups *groups =
129 field_to_type(f, disk_groups);
130 struct bch_disk_group *g;
131 unsigned nr_groups = disk_groups_nr(groups);
133 for (g = groups->entries;
134 g < groups->entries + nr_groups;
136 if (g != groups->entries)
137 prt_printf(out, " ");
139 if (BCH_GROUP_DELETED(g))
140 prt_printf(out, "[deleted]");
142 prt_printf(out, "[parent %llu name %s]",
143 BCH_GROUP_PARENT(g), g->label);
147 const struct bch_sb_field_ops bch_sb_field_ops_disk_groups = {
148 .validate = bch2_sb_disk_groups_validate,
149 .to_text = bch2_sb_disk_groups_to_text
152 int bch2_sb_disk_groups_to_cpu(struct bch_fs *c)
154 struct bch_sb_field_disk_groups *groups;
155 struct bch_disk_groups_cpu *cpu_g, *old_g;
156 unsigned i, g, nr_groups;
158 lockdep_assert_held(&c->sb_lock);
160 groups = bch2_sb_field_get(c->disk_sb.sb, disk_groups);
161 nr_groups = disk_groups_nr(groups);
166 cpu_g = kzalloc(struct_size(cpu_g, entries, nr_groups), GFP_KERNEL);
168 return -BCH_ERR_ENOMEM_disk_groups_to_cpu;
170 cpu_g->nr = nr_groups;
172 for (i = 0; i < nr_groups; i++) {
173 struct bch_disk_group *src = &groups->entries[i];
174 struct bch_disk_group_cpu *dst = &cpu_g->entries[i];
176 dst->deleted = BCH_GROUP_DELETED(src);
177 dst->parent = BCH_GROUP_PARENT(src);
180 for (i = 0; i < c->disk_sb.sb->nr_devices; i++) {
181 struct bch_member m = bch2_sb_member_get(c->disk_sb.sb, i);
182 struct bch_disk_group_cpu *dst;
184 if (!bch2_member_exists(&m))
187 g = BCH_MEMBER_GROUP(&m);
189 dst = &cpu_g->entries[g - 1];
190 __set_bit(i, dst->devs.d);
195 old_g = rcu_dereference_protected(c->disk_groups,
196 lockdep_is_held(&c->sb_lock));
197 rcu_assign_pointer(c->disk_groups, cpu_g);
199 kfree_rcu(old_g, rcu);
204 const struct bch_devs_mask *bch2_target_to_mask(struct bch_fs *c, unsigned target)
206 struct target t = target_decode(target);
207 struct bch_devs_mask *devs;
216 struct bch_dev *ca = t.dev < c->sb.nr_devices
217 ? rcu_dereference(c->devs[t.dev])
219 devs = ca ? &ca->self : NULL;
223 struct bch_disk_groups_cpu *g = rcu_dereference(c->disk_groups);
225 devs = g && t.group < g->nr && !g->entries[t.group].deleted
226 ? &g->entries[t.group].devs
239 bool bch2_dev_in_target(struct bch_fs *c, unsigned dev, unsigned target)
241 struct target t = target_decode(target);
249 struct bch_disk_groups_cpu *g;
250 const struct bch_devs_mask *m;
254 g = rcu_dereference(c->disk_groups);
255 m = g && t.group < g->nr && !g->entries[t.group].deleted
256 ? &g->entries[t.group].devs
259 ret = m ? test_bit(dev, m->d) : false;
269 static int __bch2_disk_group_find(struct bch_sb_field_disk_groups *groups,
271 const char *name, unsigned namelen)
273 unsigned i, nr_groups = disk_groups_nr(groups);
275 if (!namelen || namelen > BCH_SB_LABEL_SIZE)
278 for (i = 0; i < nr_groups; i++) {
279 struct bch_disk_group *g = groups->entries + i;
281 if (BCH_GROUP_DELETED(g))
284 if (!BCH_GROUP_DELETED(g) &&
285 BCH_GROUP_PARENT(g) == parent &&
286 strnlen(g->label, sizeof(g->label)) == namelen &&
287 !memcmp(name, g->label, namelen))
294 static int __bch2_disk_group_add(struct bch_sb_handle *sb, unsigned parent,
295 const char *name, unsigned namelen)
297 struct bch_sb_field_disk_groups *groups =
298 bch2_sb_field_get(sb->sb, disk_groups);
299 unsigned i, nr_groups = disk_groups_nr(groups);
300 struct bch_disk_group *g;
302 if (!namelen || namelen > BCH_SB_LABEL_SIZE)
306 i < nr_groups && !BCH_GROUP_DELETED(&groups->entries[i]);
310 if (i == nr_groups) {
312 (sizeof(struct bch_sb_field_disk_groups) +
313 sizeof(struct bch_disk_group) * (nr_groups + 1)) /
316 groups = bch2_sb_field_resize(sb, disk_groups, u64s);
318 return -BCH_ERR_ENOSPC_disk_label_add;
320 nr_groups = disk_groups_nr(groups);
323 BUG_ON(i >= nr_groups);
325 g = &groups->entries[i];
327 memcpy(g->label, name, namelen);
328 if (namelen < sizeof(g->label))
329 g->label[namelen] = '\0';
330 SET_BCH_GROUP_DELETED(g, 0);
331 SET_BCH_GROUP_PARENT(g, parent);
332 SET_BCH_GROUP_DATA_ALLOWED(g, ~0);
337 int bch2_disk_path_find(struct bch_sb_handle *sb, const char *name)
339 struct bch_sb_field_disk_groups *groups =
340 bch2_sb_field_get(sb->sb, disk_groups);
344 const char *next = strchrnul(name, '.');
345 unsigned len = next - name;
350 v = __bch2_disk_group_find(groups, v + 1, name, len);
352 } while (*name && v >= 0);
357 int bch2_disk_path_find_or_create(struct bch_sb_handle *sb, const char *name)
359 struct bch_sb_field_disk_groups *groups;
364 const char *next = strchrnul(name, '.');
365 unsigned len = next - name;
370 groups = bch2_sb_field_get(sb->sb, disk_groups);
372 v = __bch2_disk_group_find(groups, parent, name, len);
374 v = __bch2_disk_group_add(sb, parent, name, len);
380 } while (*name && v >= 0);
385 void bch2_disk_path_to_text(struct printbuf *out, struct bch_sb *sb, unsigned v)
387 struct bch_sb_field_disk_groups *groups =
388 bch2_sb_field_get(sb, disk_groups);
389 struct bch_disk_group *g;
394 if (nr == ARRAY_SIZE(path))
397 if (v >= disk_groups_nr(groups))
400 g = groups->entries + v;
402 if (BCH_GROUP_DELETED(g))
407 if (!BCH_GROUP_PARENT(g))
410 v = BCH_GROUP_PARENT(g) - 1;
415 g = groups->entries + v;
417 prt_printf(out, "%.*s", (int) sizeof(g->label), g->label);
419 prt_printf(out, ".");
423 prt_printf(out, "invalid label %u", v);
426 int __bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
428 struct bch_member *mi;
431 if (!strlen(name) || !strcmp(name, "none"))
434 v = bch2_disk_path_find_or_create(&c->disk_sb, name);
438 ret = bch2_sb_disk_groups_to_cpu(c);
442 mi = bch2_members_v2_get_mut(c->disk_sb.sb, ca->dev_idx);
443 SET_BCH_MEMBER_GROUP(mi, v + 1);
447 int bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
451 mutex_lock(&c->sb_lock);
452 ret = __bch2_dev_group_set(c, ca, name) ?:
454 mutex_unlock(&c->sb_lock);
459 int bch2_opt_target_parse(struct bch_fs *c, const char *val, u64 *res,
460 struct printbuf *err)
471 if (!strlen(val) || !strcmp(val, "none")) {
476 /* Is it a device? */
477 ca = bch2_dev_lookup(c, val);
479 *res = dev_to_target(ca->dev_idx);
480 percpu_ref_put(&ca->ref);
484 mutex_lock(&c->sb_lock);
485 g = bch2_disk_path_find(&c->disk_sb, val);
486 mutex_unlock(&c->sb_lock);
489 *res = group_to_target(g);
496 void bch2_opt_target_to_text(struct printbuf *out,
501 struct target t = target_decode(v);
505 prt_printf(out, "none");
512 ca = t.dev < c->sb.nr_devices
513 ? rcu_dereference(c->devs[t.dev])
516 if (ca && percpu_ref_tryget(&ca->io_ref)) {
517 prt_printf(out, "/dev/%pg", ca->disk_sb.bdev);
518 percpu_ref_put(&ca->io_ref);
520 prt_printf(out, "offline device %u", t.dev);
522 prt_printf(out, "invalid device %u", t.dev);
527 struct bch_member m = bch2_sb_member_get(sb, t.dev);
529 if (bch2_dev_exists(sb, t.dev)) {
530 prt_printf(out, "Device ");
531 pr_uuid(out, m.uuid.b);
532 prt_printf(out, " (%u)", t.dev);
534 prt_printf(out, "Bad device %u", t.dev);
540 mutex_lock(&c->sb_lock);
541 bch2_disk_path_to_text(out, c->disk_sb.sb, t.group);
542 mutex_unlock(&c->sb_lock);
544 bch2_disk_path_to_text(out, sb, t.group);