static ssize_t lru_size_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
struct ldlm_namespace *ns = container_of(kobj, struct ldlm_namespace,
ns_kobj);
unsigned long tmp;
int lru_resize;
int err;
if (strncmp(buffer, "clear", 5) == 0) {
CDEBUG(D_DLMTRACE,
"dropping all unused locks from namespace %s\n",
ldlm_ns_name(ns));
if (ns_connect_lru_resize(ns)) {
int canceled, unused = ns->ns_nr_unused;
/* Try to cancel all @ns_nr_unused locks. */
canceled = ldlm_cancel_lru(ns, unused, 0,
LDLM_LRU_FLAG_PASSED);
if (canceled < unused) {
CDEBUG(D_DLMTRACE,
"not all requested locks are canceled, requested: %d, canceled: %d\n",
unused,
canceled);
return -EINVAL;
}
} else {
tmp = ns->ns_max_unused;
ns->ns_max_unused = 0;
ldlm_cancel_lru(ns, 0, 0, LDLM_LRU_FLAG_PASSED);
ns->ns_max_unused = tmp;
}
return count;
}
err = kstrtoul(buffer, 10, &tmp);
if (err != 0) {
CERROR("lru_size: invalid value written\n");
return -EINVAL;
}
lru_resize = (tmp == 0);
if (ns_connect_lru_resize(ns)) {
if (!lru_resize)
ns->ns_max_unused = (unsigned int)tmp;
if (tmp > ns->ns_nr_unused)
tmp = ns->ns_nr_unused;
tmp = ns->ns_nr_unused - tmp;
CDEBUG(D_DLMTRACE,
"changing namespace %s unused locks from %u to %u\n",
ldlm_ns_name(ns), ns->ns_nr_unused,
(unsigned int)tmp);
ldlm_cancel_lru(ns, tmp, LCF_ASYNC, LDLM_LRU_FLAG_PASSED);
if (!lru_resize) {
CDEBUG(D_DLMTRACE,
"disable lru_resize for namespace %s\n",
ldlm_ns_name(ns));
ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
}
} else {
CDEBUG(D_DLMTRACE,
"changing namespace %s max_unused from %u to %u\n",
ldlm_ns_name(ns), ns->ns_max_unused,
(unsigned int)tmp);
ns->ns_max_unused = (unsigned int)tmp;
ldlm_cancel_lru(ns, 0, LCF_ASYNC, LDLM_LRU_FLAG_PASSED);
/* Make sure that LRU resize was originally supported before
* turning it on here.
*/
if (lru_resize &&
(ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
CDEBUG(D_DLMTRACE,
"enable lru_resize for namespace %s\n",
ldlm_ns_name(ns));
ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
}
}
return count;
}
static ssize_t lprocfs_lru_size_seq_write(struct file *file, const char *buffer,
size_t count, loff_t *off)
{
struct ldlm_namespace *ns = ((struct seq_file *)file->private_data)->private;
char dummy[MAX_STRING_SIZE + 1], *end;
unsigned long tmp;
int lru_resize;
dummy[MAX_STRING_SIZE] = '\0';
if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
return -EFAULT;
if (strncmp(dummy, "clear", 5) == 0) {
CDEBUG(D_DLMTRACE,
"dropping all unused locks from namespace %s\n",
ldlm_ns_name(ns));
if (ns_connect_lru_resize(ns)) {
int canceled, unused = ns->ns_nr_unused;
/* Try to cancel all @ns_nr_unused locks. */
canceled = ldlm_cancel_lru(ns, unused, 0,
LDLM_CANCEL_PASSED);
if (canceled < unused) {
CDEBUG(D_DLMTRACE,
"not all requested locks are canceled, "
"requested: %d, canceled: %d\n", unused,
canceled);
return -EINVAL;
}
} else {
tmp = ns->ns_max_unused;
ns->ns_max_unused = 0;
ldlm_cancel_lru(ns, 0, 0, LDLM_CANCEL_PASSED);
ns->ns_max_unused = tmp;
}
return count;
}
tmp = simple_strtoul(dummy, &end, 0);
if (dummy == end) {
CERROR("invalid value written\n");
return -EINVAL;
}
lru_resize = (tmp == 0);
if (ns_connect_lru_resize(ns)) {
if (!lru_resize)
ns->ns_max_unused = (unsigned int)tmp;
if (tmp > ns->ns_nr_unused)
tmp = ns->ns_nr_unused;
tmp = ns->ns_nr_unused - tmp;
CDEBUG(D_DLMTRACE,
"changing namespace %s unused locks from %u to %u\n",
ldlm_ns_name(ns), ns->ns_nr_unused,
(unsigned int)tmp);
ldlm_cancel_lru(ns, tmp, LCF_ASYNC, LDLM_CANCEL_PASSED);
if (!lru_resize) {
CDEBUG(D_DLMTRACE,
"disable lru_resize for namespace %s\n",
ldlm_ns_name(ns));
ns->ns_connect_flags &= ~OBD_CONNECT_LRU_RESIZE;
}
} else {
CDEBUG(D_DLMTRACE,
"changing namespace %s max_unused from %u to %u\n",
ldlm_ns_name(ns), ns->ns_max_unused,
(unsigned int)tmp);
ns->ns_max_unused = (unsigned int)tmp;
ldlm_cancel_lru(ns, 0, LCF_ASYNC, LDLM_CANCEL_PASSED);
/* Make sure that LRU resize was originally supported before
* turning it on here. */
if (lru_resize &&
(ns->ns_orig_connect_flags & OBD_CONNECT_LRU_RESIZE)) {
CDEBUG(D_DLMTRACE,
"enable lru_resize for namespace %s\n",
ldlm_ns_name(ns));
ns->ns_connect_flags |= OBD_CONNECT_LRU_RESIZE;
}
}
return count;
}