+// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "disk_groups.h"
#include "super-io.h"
strncmp(l->label, r->label, sizeof(l->label));
}
-const char *bch2_sb_disk_groups_validate(struct bch_sb *sb,
- struct bch_sb_field *f)
+static int bch2_sb_disk_groups_validate(struct bch_sb *sb,
+ struct bch_sb_field *f,
+ struct printbuf *err)
{
struct bch_sb_field_disk_groups *groups =
field_to_type(f, disk_groups);
struct bch_disk_group *g, *sorted = NULL;
- struct bch_sb_field_members *mi;
- struct bch_member *m;
- unsigned i, nr_groups, len;
- const char *err = NULL;
-
- mi = bch2_sb_get_members(sb);
- groups = bch2_sb_get_disk_groups(sb);
- nr_groups = disk_groups_nr(groups);
+ struct bch_sb_field_members *mi = bch2_sb_get_members(sb);
+ unsigned nr_groups = disk_groups_nr(groups);
+ unsigned i, len;
+ int ret = 0;
- for (m = mi->members;
- m < mi->members + sb->nr_devices;
- m++) {
+ for (i = 0; i < sb->nr_devices; i++) {
+ struct bch_member *m = mi->members + i;
unsigned g;
if (!BCH_MEMBER_GROUP(m))
g = BCH_MEMBER_GROUP(m) - 1;
- if (g >= nr_groups ||
- BCH_GROUP_DELETED(&groups->entries[g]))
- return "disk has invalid group";
+ if (g >= nr_groups) {
+ prt_printf(err, "disk %u has invalid label %u (have %u)",
+ i, g, nr_groups);
+ return -BCH_ERR_invalid_sb_disk_groups;
+ }
+
+ if (BCH_GROUP_DELETED(&groups->entries[g])) {
+ prt_printf(err, "disk %u has deleted label %u", i, g);
+ return -BCH_ERR_invalid_sb_disk_groups;
+ }
}
if (!nr_groups)
- return NULL;
+ return 0;
+
+ for (i = 0; i < nr_groups; i++) {
+ g = groups->entries + i;
- for (g = groups->entries;
- g < groups->entries + nr_groups;
- g++) {
if (BCH_GROUP_DELETED(g))
continue;
len = strnlen(g->label, sizeof(g->label));
if (!len) {
- err = "group with empty label";
- goto err;
+ prt_printf(err, "label %u empty", i);
+ return -BCH_ERR_invalid_sb_disk_groups;
}
}
sorted = kmalloc_array(nr_groups, sizeof(*sorted), GFP_KERNEL);
if (!sorted)
- return "cannot allocate memory";
+ return -BCH_ERR_ENOMEM_disk_groups_validate;
memcpy(sorted, groups->entries, nr_groups * sizeof(*sorted));
sort(sorted, nr_groups, sizeof(*sorted), group_cmp, NULL);
- for (i = 0; i + 1 < nr_groups; i++)
- if (!BCH_GROUP_DELETED(sorted + i) &&
- !group_cmp(sorted + i, sorted + i + 1)) {
- err = "duplicate groups";
+ for (g = sorted; g + 1 < sorted + nr_groups; g++)
+ if (!BCH_GROUP_DELETED(g) &&
+ !group_cmp(&g[0], &g[1])) {
+ prt_printf(err, "duplicate label %llu.%.*s",
+ BCH_GROUP_PARENT(g),
+ (int) sizeof(g->label), g->label);
+ ret = -BCH_ERR_invalid_sb_disk_groups;
goto err;
}
-
- err = NULL;
err:
kfree(sorted);
- return err;
+ return ret;
}
-static size_t bch2_sb_disk_groups_to_text(char *buf, size_t size,
+static void bch2_sb_disk_groups_to_text(struct printbuf *out,
struct bch_sb *sb,
struct bch_sb_field *f)
{
- char *out = buf, *end = buf + size;
struct bch_sb_field_disk_groups *groups =
field_to_type(f, disk_groups);
struct bch_disk_group *g;
g < groups->entries + nr_groups;
g++) {
if (g != groups->entries)
- out += scnprintf(out, end - out, " ");
+ prt_printf(out, " ");
if (BCH_GROUP_DELETED(g))
- out += scnprintf(out, end - out, "[deleted]");
+ prt_printf(out, "[deleted]");
else
- out += scnprintf(out, end - out,
- "[parent %llu name %s]",
- BCH_GROUP_PARENT(g),
- g->label);
+ prt_printf(out, "[parent %llu name %s]",
+ BCH_GROUP_PARENT(g), g->label);
}
-
- return out - buf;
}
const struct bch_sb_field_ops bch_sb_field_ops_disk_groups = {
cpu_g = kzalloc(sizeof(*cpu_g) +
sizeof(cpu_g->entries[0]) * nr_groups, GFP_KERNEL);
if (!cpu_g)
- return -ENOMEM;
+ return -BCH_ERR_ENOMEM_disk_groups_to_cpu;
cpu_g->nr = nr_groups;
}
}
- old_g = c->disk_groups;
+ old_g = rcu_dereference_protected(c->disk_groups,
+ lockdep_is_held(&c->sb_lock));
rcu_assign_pointer(c->disk_groups, cpu_g);
if (old_g)
kfree_rcu(old_g, rcu);
struct target t = target_decode(target);
switch (t.type) {
+ case TARGET_NULL:
+ return NULL;
case TARGET_DEV: {
struct bch_dev *ca = t.dev < c->sb.nr_devices
? rcu_dereference(c->devs[t.dev])
case TARGET_GROUP: {
struct bch_disk_groups_cpu *g = rcu_dereference(c->disk_groups);
- return t.group < g->nr && !g->entries[t.group].deleted
+ return g && t.group < g->nr && !g->entries[t.group].deleted
? &g->entries[t.group].devs
: NULL;
}
}
}
+bool bch2_dev_in_target(struct bch_fs *c, unsigned dev, unsigned target)
+{
+ struct target t = target_decode(target);
+
+ switch (t.type) {
+ case TARGET_NULL:
+ return false;
+ case TARGET_DEV:
+ return dev == t.dev;
+ case TARGET_GROUP: {
+ struct bch_disk_groups_cpu *g;
+ const struct bch_devs_mask *m;
+ bool ret;
+
+ rcu_read_lock();
+ g = rcu_dereference(c->disk_groups);
+ m = g && t.group < g->nr && !g->entries[t.group].deleted
+ ? &g->entries[t.group].devs
+ : NULL;
+
+ ret = m ? test_bit(dev, m->d) : false;
+ rcu_read_unlock();
+
+ return ret;
+ }
+ default:
+ BUG();
+ }
+}
+
static int __bch2_disk_group_find(struct bch_sb_field_disk_groups *groups,
unsigned parent,
const char *name, unsigned namelen)
groups = bch2_sb_resize_disk_groups(sb, u64s);
if (!groups)
- return -ENOSPC;
+ return -BCH_ERR_ENOSPC_disk_label_add;
nr_groups = disk_groups_nr(groups);
}
return v;
}
-int bch2_disk_path_print(struct bch_sb_handle *sb,
- char *buf, size_t len, unsigned v)
+void bch2_disk_path_to_text(struct printbuf *out, struct bch_sb *sb, unsigned v)
{
- char *out = buf, *end = out + len;
struct bch_sb_field_disk_groups *groups =
- bch2_sb_get_disk_groups(sb->sb);
+ bch2_sb_get_disk_groups(sb);
struct bch_disk_group *g;
unsigned nr = 0;
u16 path[32];
}
while (nr) {
- unsigned b = 0;
-
v = path[--nr];
g = groups->entries + v;
- if (end != out)
- b = min_t(size_t, end - out,
- strnlen(g->label, sizeof(g->label)));
- memcpy(out, g->label, b);
- if (b < end - out)
- out[b] = '\0';
- out += b;
-
+ prt_printf(out, "%.*s", (int) sizeof(g->label), g->label);
if (nr)
- out += scnprintf(out, end - out, ".");
+ prt_printf(out, ".");
}
-
- return out - buf;
+ return;
inval:
- return scnprintf(buf, len, "invalid group %u", v);
+ prt_printf(out, "invalid label %u", v);
}
-int bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
+int __bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
{
struct bch_member *mi;
- int v = -1;
-
- mutex_lock(&c->sb_lock);
+ int ret, v = -1;
if (!strlen(name) || !strcmp(name, "none"))
- goto write_sb;
+ return 0;
v = bch2_disk_path_find_or_create(&c->disk_sb, name);
- if (v < 0) {
- mutex_unlock(&c->sb_lock);
+ if (v < 0)
return v;
- }
-write_sb:
+ ret = bch2_sb_disk_groups_to_cpu(c);
+ if (ret)
+ return ret;
+
mi = &bch2_sb_get_members(c->disk_sb.sb)->members[ca->dev_idx];
SET_BCH_MEMBER_GROUP(mi, v + 1);
+ return 0;
+}
+
+int bch2_dev_group_set(struct bch_fs *c, struct bch_dev *ca, const char *name)
+{
+ int ret;
- bch2_write_super(c);
+ mutex_lock(&c->sb_lock);
+ ret = __bch2_dev_group_set(c, ca, name) ?:
+ bch2_write_super(c);
mutex_unlock(&c->sb_lock);
- return 0;
+ return ret;
}
int bch2_opt_target_parse(struct bch_fs *c, const char *buf, u64 *v)
return -EINVAL;
}
-int bch2_opt_target_print(struct bch_fs *c, char *buf, size_t len, u64 v)
+void bch2_opt_target_to_text(struct printbuf *out,
+ struct bch_fs *c,
+ struct bch_sb *sb,
+ u64 v)
{
struct target t = target_decode(v);
- int ret;
switch (t.type) {
case TARGET_NULL:
- return scnprintf(buf, len, "none");
- case TARGET_DEV: {
- struct bch_dev *ca;
-
- rcu_read_lock();
- ca = t.dev < c->sb.nr_devices
- ? rcu_dereference(c->devs[t.dev])
- : NULL;
-
- if (ca && percpu_ref_tryget(&ca->io_ref)) {
- char b[BDEVNAME_SIZE];
-
- ret = scnprintf(buf, len, "/dev/%s",
- bdevname(ca->disk_sb.bdev, b));
- percpu_ref_put(&ca->io_ref);
- } else if (ca) {
- ret = scnprintf(buf, len, "offline device %u", t.dev);
+ prt_printf(out, "none");
+ break;
+ case TARGET_DEV:
+ if (c) {
+ struct bch_dev *ca;
+
+ rcu_read_lock();
+ ca = t.dev < c->sb.nr_devices
+ ? rcu_dereference(c->devs[t.dev])
+ : NULL;
+
+ if (ca && percpu_ref_tryget(&ca->io_ref)) {
+ prt_printf(out, "/dev/%pg", ca->disk_sb.bdev);
+ percpu_ref_put(&ca->io_ref);
+ } else if (ca) {
+ prt_printf(out, "offline device %u", t.dev);
+ } else {
+ prt_printf(out, "invalid device %u", t.dev);
+ }
+
+ rcu_read_unlock();
} else {
- ret = scnprintf(buf, len, "invalid device %u", t.dev);
+ struct bch_sb_field_members *mi = bch2_sb_get_members(sb);
+ struct bch_member *m = mi->members + t.dev;
+
+ if (bch2_dev_exists(sb, mi, t.dev)) {
+ prt_printf(out, "Device ");
+ pr_uuid(out, m->uuid.b);
+ prt_printf(out, " (%u)", t.dev);
+ } else {
+ prt_printf(out, "Bad device %u", t.dev);
+ }
}
-
- rcu_read_unlock();
break;
- }
case TARGET_GROUP:
- mutex_lock(&c->sb_lock);
- ret = bch2_disk_path_print(&c->disk_sb, buf, len, t.group);
- mutex_unlock(&c->sb_lock);
+ if (c) {
+ mutex_lock(&c->sb_lock);
+ bch2_disk_path_to_text(out, c->disk_sb.sb, t.group);
+ mutex_unlock(&c->sb_lock);
+ } else {
+ bch2_disk_path_to_text(out, sb, t.group);
+ }
break;
default:
BUG();
}
-
- return ret;
}
projects / bcachefs-tools-debian / blobdiff