if (!obd)
return -EINVAL;
- if (obd->obd_proc_exports_entry) {
- /* Should be no exports left */
- lprocfs_remove(&obd->obd_proc_exports_entry);
- obd->obd_proc_exports_entry = NULL;
- }
-
if (!IS_ERR_OR_NULL(obd->obd_debugfs_entry))
ldebugfs_remove(&obd->obd_debugfs_entry);
}
EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
-int lprocfs_exp_print_uuid(struct cfs_hash *hs, struct cfs_hash_bd *bd,
- struct hlist_node *hnode, void *data)
-
-{
- struct obd_export *exp = cfs_hash_object(hs, hnode);
- struct seq_file *m = (struct seq_file *)data;
-
- if (exp->exp_nid_stats)
- seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
-
- return 0;
-}
-
-static int
-lproc_exp_uuid_seq_show(struct seq_file *m, void *unused)
-{
- struct nid_stat *stats = (struct nid_stat *)m->private;
- struct obd_device *obd = stats->nid_obd;
-
- cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
- lprocfs_exp_print_uuid, m);
- return 0;
-}
-
-LPROC_SEQ_FOPS_RO(lproc_exp_uuid);
-
-struct exp_hash_cb_data {
- struct seq_file *m;
- bool first;
-};
-
-int lprocfs_exp_print_hash(struct cfs_hash *hs, struct cfs_hash_bd *bd,
- struct hlist_node *hnode, void *cb_data)
-
-{
- struct exp_hash_cb_data *data = (struct exp_hash_cb_data *)cb_data;
- struct obd_export *exp = cfs_hash_object(hs, hnode);
-
- if (exp->exp_lock_hash != NULL) {
- if (data->first) {
- cfs_hash_debug_header(data->m);
- data->first = false;
- }
- cfs_hash_debug_str(hs, data->m);
- }
-
- return 0;
-}
-
-static int
-lproc_exp_hash_seq_show(struct seq_file *m, void *unused)
-{
- struct nid_stat *stats = (struct nid_stat *)m->private;
- struct obd_device *obd = stats->nid_obd;
- struct exp_hash_cb_data cb_data = {
- .m = m,
- .first = true
- };
-
- cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
- lprocfs_exp_print_hash, &cb_data);
- return 0;
-}
-
-LPROC_SEQ_FOPS_RO(lproc_exp_hash);
-
int lprocfs_nid_stats_clear_read(struct seq_file *m, void *data)
{
seq_printf(m, "%s\n",
}
EXPORT_SYMBOL(lprocfs_nid_stats_clear_write);
-int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid, int *newnid)
-{
- struct nid_stat *new_stat, *old_stat;
- struct obd_device *obd = NULL;
- struct proc_dir_entry *entry;
- char *buffer = NULL;
- int rc = 0;
-
- *newnid = 0;
-
- if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
- !exp->exp_obd->obd_nid_stats_hash)
- return -EINVAL;
-
- /* not test against zero because eric say:
- * You may only test nid against another nid, or LNET_NID_ANY.
- * Anything else is nonsense.*/
- if (!nid || *nid == LNET_NID_ANY)
- return 0;
-
- obd = exp->exp_obd;
-
- CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
-
- new_stat = kzalloc(sizeof(*new_stat), GFP_NOFS);
- if (new_stat == NULL)
- return -ENOMEM;
-
- new_stat->nid = *nid;
- new_stat->nid_obd = exp->exp_obd;
- /* we need set default refcount to 1 to balance obd_disconnect */
- atomic_set(&new_stat->nid_exp_ref_count, 1);
-
- old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
- nid, &new_stat->nid_hash);
- CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
- old_stat, libcfs_nid2str(*nid),
- atomic_read(&new_stat->nid_exp_ref_count));
-
- /* We need to release old stats because lprocfs_exp_cleanup() hasn't
- * been and will never be called. */
- if (exp->exp_nid_stats) {
- nidstat_putref(exp->exp_nid_stats);
- exp->exp_nid_stats = NULL;
- }
-
- /* Return -EALREADY here so that we know that the /proc
- * entry already has been created */
- if (old_stat != new_stat) {
- exp->exp_nid_stats = old_stat;
- rc = -EALREADY;
- goto destroy_new;
- }
- /* not found - create */
- buffer = kmemdup(libcfs_nid2str(*nid), LNET_NIDSTR_SIZE, GFP_NOFS);
- if (buffer == NULL) {
- rc = -ENOMEM;
- goto destroy_new;
- }
-
- new_stat->nid_proc = lprocfs_register(buffer,
- obd->obd_proc_exports_entry,
- NULL, NULL);
- kfree(buffer);
-
- if (IS_ERR(new_stat->nid_proc)) {
- CERROR("Error making export directory for nid %s\n",
- libcfs_nid2str(*nid));
- rc = PTR_ERR(new_stat->nid_proc);
- new_stat->nid_proc = NULL;
- goto destroy_new_ns;
- }
-
- entry = lprocfs_add_simple(new_stat->nid_proc, "uuid",
- new_stat, &lproc_exp_uuid_fops);
- if (IS_ERR(entry)) {
- CWARN("Error adding the NID stats file\n");
- rc = PTR_ERR(entry);
- goto destroy_new_ns;
- }
-
- entry = lprocfs_add_simple(new_stat->nid_proc, "hash",
- new_stat, &lproc_exp_hash_fops);
- if (IS_ERR(entry)) {
- CWARN("Error adding the hash file\n");
- rc = PTR_ERR(entry);
- goto destroy_new_ns;
- }
-
- exp->exp_nid_stats = new_stat;
- *newnid = 1;
- /* protect competitive add to list, not need locking on destroy */
- spin_lock(&obd->obd_nid_lock);
- list_add(&new_stat->nid_list, &obd->obd_nid_stats);
- spin_unlock(&obd->obd_nid_lock);
-
- return rc;
-
-destroy_new_ns:
- if (new_stat->nid_proc != NULL)
- lprocfs_remove(&new_stat->nid_proc);
- cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
-
-destroy_new:
- nidstat_putref(new_stat);
- kfree(new_stat);
- return rc;
-}
-EXPORT_SYMBOL(lprocfs_exp_setup);
-
int lprocfs_exp_cleanup(struct obd_export *exp)
{
struct nid_stat *stat = exp->exp_nid_stats;
projects / firefly-linux-kernel-4.4.55.git / blobdiff