LU-3397 lprocfs: create "export" /proc file on server

[fs/lustre-release.git] / lustre / obdclass / lprocfs_status_server.c

diff --git a/lustre/obdclass/lprocfs_status_server.c b/lustre/obdclass/lprocfs_status_server.c
index 242d3fa..08f3f18 100644 (file)
--- a/lustre/obdclass/lprocfs_status_server.c
+++ b/lustre/obdclass/lprocfs_status_server.c
@@ -115,6 +115,86 @@ int lprocfs_num_exports_seq_show(struct seq_file *m, void *data)
 }
 EXPORT_SYMBOL(lprocfs_num_exports_seq_show);
 
+static int obd_export_flags2str(struct obd_export *exp, struct seq_file *m)
+{
+       bool first = true;
+
+       flag2str(exp, failed);
+       flag2str(exp, in_recovery);
+       flag2str(exp, disconnected);
+       flag2str(exp, connecting);
+
+       return 0;
+}
+
+static int
+lprocfs_exp_print_export_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+                            struct hlist_node *hnode, void *cb_data)
+{
+       struct seq_file         *m = cb_data;
+       struct obd_export       *exp = cfs_hash_object(hs, hnode);
+       struct obd_device       *obd;
+       struct obd_connect_data *ocd;
+
+       LASSERT(exp != NULL);
+       if (exp->exp_nid_stats == NULL)
+               goto out;
+       obd = exp->exp_obd;
+       ocd = &exp->exp_connect_data;
+
+       seq_printf(m, "%s:\n"
+                  "    name: %s\n"
+                  "    client: %s\n"
+                  "    connect_flags: [ ",
+                  obd_uuid2str(&exp->exp_client_uuid),
+                  obd->obd_name,
+                  obd_export_nid2str(exp));
+       obd_connect_seq_flags2str(m, ocd->ocd_connect_flags,
+                                 ocd->ocd_connect_flags2, ", ");
+       seq_printf(m, " ]\n");
+       obd_connect_data_seqprint(m, ocd);
+       seq_printf(m, "    export_flags: [ ");
+       obd_export_flags2str(exp, m);
+       seq_printf(m, " ]\n");
+
+out:
+       return 0;
+}
+
+/**
+ * RPC connections are composed of an import and an export. Using the
+ * lctl utility we can extract important information about the state.
+ * The lprocfs_exp_export_seq_show routine displays the state information
+ * for the export.
+ *
+ * \param[in] m                seq file
+ * \param[in] data     unused
+ *
+ * \retval             0 on success
+ *
+ * The format of the export state information is like:
+ * a793e354-49c0-aa11-8c4f-a4f2b1a1a92b:
+ *     name: MGS
+ *     client: 10.211.55.10@tcp
+ *     connect_flags: [ version, barrier, adaptive_timeouts, ... ]
+ *     connect_data:
+ *        flags: 0x2000011005002020
+ *        instance: 0
+ *        target_version: 2.10.51.0
+ *        export_flags: [ ... ]
+ *
+ */
+static int lprocfs_exp_export_seq_show(struct seq_file *m, void *data)
+{
+       struct nid_stat *stats = m->private;
+       struct obd_device *obd = stats->nid_obd;
+
+       cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
+                             lprocfs_exp_print_export_seq, m);
+       return 0;
+}
+LPROC_SEQ_FOPS_RO(lprocfs_exp_export);
+
 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
 {
        CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
@@ -385,7 +465,8 @@ int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
                                   &lprocfs_exp_nodemap_fops);
        if (IS_ERR(entry)) {
                rc = PTR_ERR(entry);
-               CWARN("Error adding the nodemap file: rc = %d\n", rc);
+               CWARN("%s: error adding the nodemap file: rc = %d\n",
+                     obd->obd_name, rc);
                GOTO(destroy_new_ns, rc);
        }
 
@@ -393,7 +474,8 @@ int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
                                   &lprocfs_exp_uuid_fops);
        if (IS_ERR(entry)) {
                rc = PTR_ERR(entry);
-               CWARN("Error adding the NID stats file: rc = %d\n", rc);
+               CWARN("%s: error adding the NID stats file: rc = %d\n",
+                     obd->obd_name, rc);
                GOTO(destroy_new_ns, rc);
        }
 
@@ -401,7 +483,17 @@ int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
                                   &lprocfs_exp_hash_fops);
        if (IS_ERR(entry)) {
                rc = PTR_ERR(entry);
-               CWARN("Error adding the hash file: rc = %d\n", rc);
+               CWARN("%s: error adding the hash file: rc = %d\n",
+                     obd->obd_name, rc);
+               GOTO(destroy_new_ns, rc);
+       }
+
+       entry = lprocfs_add_simple(new_stat->nid_proc, "export",
+                                  new_stat, &lprocfs_exp_export_fops);
+       if (IS_ERR(entry)) {
+               rc = PTR_ERR(entry);
+               CWARN("%s: error adding the export file: rc = %d\n",
+                     obd->obd_name, rc);
                GOTO(destroy_new_ns, rc);
        }
 
@@ -409,7 +501,7 @@ int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
                                   &lprocfs_exp_replydata_fops);
        if (IS_ERR(entry)) {
                rc = PTR_ERR(entry);
-               CWARN("%s: Error adding the reply_data file: rc = %d\n",
+               CWARN("%s: error adding the reply_data file: rc = %d\n",
                      obd->obd_name, rc);
                GOTO(destroy_new_ns, rc);
        }