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LU-12904 gss: struct cache_detail readers changed to writers
[fs/lustre-release.git] / lustre / mgs / lproc_mgs.c
index 732e362..5a5c70b 100644 (file)
  *
  * You should have received a copy of the GNU General Public License
  * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
@@ -27,7 +23,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2013, Intel Corporation.
+ * Copyright (c) 2011, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 #include <obd.h>
 #include <obd_class.h>
 #include <lprocfs_status.h>
-#include <lustre_param.h>
+#include <uapi/linux/lustre/lustre_param.h>
 #include "mgs_internal.h"
 
-#ifdef LPROCFS
+#ifdef CONFIG_PROC_FS
 
 static int mgs_fs_seq_show(struct seq_file *seq, void *v)
 {
-        struct obd_device *obd = seq->private;
-       struct mgs_device *mgs;
-       cfs_list_t list;
-       struct mgs_direntry *dirent, *n;
-       struct lu_env env;
-        int rc, len;
-        ENTRY;
-
-        LASSERT(obd != NULL);
+       struct obd_device       *obd = seq->private;
+       struct mgs_device       *mgs;
+       struct list_head         list;
+       struct mgs_direntry     *dirent, *n;
+       struct lu_env            env;
+       int rc, len;
+
+       ENTRY;
+
+       LASSERT(obd != NULL);
        LASSERT(obd->obd_lu_dev != NULL);
        mgs = lu2mgs_dev(obd->obd_lu_dev);
 
@@ -64,42 +61,43 @@ static int mgs_fs_seq_show(struct seq_file *seq, void *v)
                RETURN(rc);
 
        rc = class_dentry_readdir(&env, mgs, &list);
-        if (rc) {
-                CERROR("Can't read config dir\n");
+       if (rc)
                GOTO(out, rc);
-        }
-       cfs_list_for_each_entry_safe(dirent, n, &list, list) {
-               cfs_list_del(&dirent->list);
-               len = strlen(dirent->name);
+
+       list_for_each_entry_safe(dirent, n, &list, mde_list) {
+               list_del_init(&dirent->mde_list);
+               len = strlen(dirent->mde_name);
                if (len > 7 &&
-                   strncmp(dirent->name + len - 7, "-client", len) == 0)
-                       seq_printf(seq, "%.*s\n", len - 7, dirent->name);
+                   strncmp(dirent->mde_name + len - 7, "-client", len) == 0)
+                       seq_printf(seq, "%.*s\n", len - 7, dirent->mde_name);
                mgs_direntry_free(dirent);
-        }
+       }
 
 out:
        lu_env_fini(&env);
-        RETURN(0);
+       RETURN(0);
 }
 
 LPROC_SEQ_FOPS_RO(mgs_fs);
 
 static void seq_show_srpc_rules(struct seq_file *seq, const char *tgtname,
-                                struct sptlrpc_rule_set *rset)
+                               struct sptlrpc_rule_set *rset)
 {
-        struct sptlrpc_rule    *r;
-        char                    dirbuf[10];
-        char                    flvrbuf[40];
-        char                   *net;
-        int                     i;
-
-        for (i = 0; i < rset->srs_nrule; i++) {
-                r = &rset->srs_rules[i];
-
-                if (r->sr_netid == LNET_NIDNET(LNET_NID_ANY))
-                        net = "default";
-                else
-                        net = libcfs_net2str(r->sr_netid);
+       struct sptlrpc_rule *r;
+       char dirbuf[10];
+       char flvrbuf[40];
+       char net_buf[LNET_NIDSTR_SIZE];
+       const char *net;
+       int i;
+
+       for (i = 0; i < rset->srs_nrule; i++) {
+               r = &rset->srs_rules[i];
+
+               if (r->sr_netid == LNET_NIDNET(LNET_NID_ANY))
+                       net = "default";
+               else
+                       net = libcfs_net2str_r(r->sr_netid, net_buf,
+                                              sizeof(net_buf));
 
                 if (r->sr_from == LUSTRE_SP_ANY && r->sr_to == LUSTRE_SP_ANY)
                         dirbuf[0] = '\0';
@@ -116,75 +114,217 @@ static void seq_show_srpc_rules(struct seq_file *seq, const char *tgtname,
 
 static int mgsself_srpc_seq_show(struct seq_file *seq, void *v)
 {
-        struct obd_device *obd = seq->private;
-       struct mgs_device *mgs;
-        struct fs_db      *fsdb;
-       struct lu_env      env;
-        int                rc;
+       struct obd_device       *obd = seq->private;
+       struct mgs_device       *mgs = lu2mgs_dev(obd->obd_lu_dev);
+       struct lu_target        *tgt = &mgs->mgs_lut;
 
-       LASSERT(obd != NULL);
-       LASSERT(obd->obd_lu_dev != NULL);
-       mgs = lu2mgs_dev(obd->obd_lu_dev);
+       read_lock(&tgt->lut_sptlrpc_lock);
+       seq_show_srpc_rules(seq, MGSSELF_NAME, &tgt->lut_sptlrpc_rset);
+       read_unlock(&tgt->lut_sptlrpc_lock);
 
-       rc = lu_env_init(&env, LCT_MG_THREAD);
-       if (rc)
-               return rc;
+        return 0;
+}
+LPROC_SEQ_FOPS_RO(mgsself_srpc);
 
-       rc = mgs_find_or_make_fsdb(&env, mgs, MGSSELF_NAME, &fsdb);
-        if (rc)
-               goto out;
+static int mgs_live_seq_show(struct seq_file *seq, void *v)
+{
+       struct fs_db             *fsdb = seq->private;
+       struct mgs_tgt_srpc_conf *srpc_tgt;
+       int i;
 
        mutex_lock(&fsdb->fsdb_mutex);
-        seq_show_srpc_rules(seq, fsdb->fsdb_name, &fsdb->fsdb_srpc_gen);
+
+       seq_printf(seq, "fsname: %s\n", fsdb->fsdb_name);
+       seq_printf(seq, "flags: %#lx     gen: %d\n",
+                  fsdb->fsdb_flags, fsdb->fsdb_gen);
+       for (i = 0; i < INDEX_MAP_SIZE * 8; i++)
+               if (test_bit(i, fsdb->fsdb_mdt_index_map))
+                        seq_printf(seq, "%s-MDT%04x\n", fsdb->fsdb_name, i);
+       for (i = 0; i < INDEX_MAP_SIZE * 8; i++)
+               if (test_bit(i, fsdb->fsdb_ost_index_map))
+                        seq_printf(seq, "%s-OST%04x\n", fsdb->fsdb_name, i);
+
+       seq_printf(seq, "\nSecure RPC Config Rules:\n");
+#if 0
+       seq_printf(seq, "%s.%s=%s\n", fsdb->fsdb_name,
+                  PARAM_SRPC_UDESC, fsdb->fsdb_srpc_fl_udesc ? "yes" : "no");
+#endif
+       for (srpc_tgt = fsdb->fsdb_srpc_tgt; srpc_tgt;
+            srpc_tgt = srpc_tgt->mtsc_next) {
+               seq_show_srpc_rules(seq, srpc_tgt->mtsc_tgt,
+                                   &srpc_tgt->mtsc_rset);
+       }
+       seq_show_srpc_rules(seq, fsdb->fsdb_name, &fsdb->fsdb_srpc_gen);
+
+       lprocfs_rd_ir_state(seq, fsdb);
+
        mutex_unlock(&fsdb->fsdb_mutex);
+       return 0;
+}
 
-out:
-       lu_env_fini(&env);
-        return 0;
+static ssize_t mgs_live_seq_write(struct file *file, const char __user *buf,
+                                 size_t len, loff_t *off)
+{
+       struct seq_file *seq  = file->private_data;
+       struct fs_db    *fsdb = seq->private;
+       ssize_t rc;
+
+       rc = lprocfs_wr_ir_state(file, buf, len, fsdb);
+       if (rc >= 0)
+               rc = len;
+       return rc;
 }
+LPROC_SEQ_FOPS(mgs_live);
 
-LPROC_SEQ_FOPS_RO(mgsself_srpc);
+int lproc_mgs_add_live(struct mgs_device *mgs, struct fs_db *fsdb)
+{
+       int rc;
+
+       if (!mgs->mgs_proc_live || fsdb->fsdb_has_lproc_entry)
+               return 0;
+
+       rc = lprocfs_seq_create(mgs->mgs_proc_live, fsdb->fsdb_name, 0644,
+                               &mgs_live_fops, fsdb);
+       if (!rc)
+               fsdb->fsdb_has_lproc_entry = 1;
+
+       return rc;
+}
+
+int lproc_mgs_del_live(struct mgs_device *mgs, struct fs_db *fsdb)
+{
+       if (!mgs->mgs_proc_live || !fsdb->fsdb_has_lproc_entry)
+               return 0;
+
+       /* didn't create the proc file for MGSSELF_NAME */
+       if (!test_bit(FSDB_MGS_SELF, &fsdb->fsdb_flags))
+               lprocfs_remove_proc_entry(fsdb->fsdb_name, mgs->mgs_proc_live);
+       return 0;
+}
+
+LPROC_SEQ_FOPS_RO_TYPE(mgs, hash);
+LPROC_SEQ_FOPS_WR_ONLY(mgs, evict_client);
+LPROC_SEQ_FOPS_RW_TYPE(mgs, ir_timeout);
+
+static struct lprocfs_vars lprocfs_mgs_obd_vars[] = {
+       { .name =       "hash_stats",
+         .fops =       &mgs_hash_fops          },
+       { .name =       "evict_client",
+         .fops =       &mgs_evict_client_fops  },
+       { .name =       "ir_timeout",
+         .fops =       &mgs_ir_timeout_fops    },
+       { NULL }
+};
+
+LUSTRE_RO_ATTR(num_exports);
+
+static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
+                          char *buf)
+{
+       struct obd_device *obd = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       struct mgs_device *mgs = lu2mgs_dev(obd->obd_lu_dev);
+       struct kobject *osd_kobj;
+
+       if (!mgs || !mgs->mgs_fstype || !mgs->mgs_bottom)
+               return -ENODEV;
+
+       osd_kobj = &mgs->mgs_bottom->dd_kobj;
+       return lustre_attr_show(osd_kobj, mgs->mgs_fstype, buf);
+}
+LUSTRE_RO_ATTR(fstype);
+
+static ssize_t mntdev_show(struct kobject *kobj, struct attribute *attr,
+                          char *buf)
+{
+       struct obd_device *obd = container_of(kobj, struct obd_device,
+                                             obd_kset.kobj);
+       struct mgs_device *mgs = lu2mgs_dev(obd->obd_lu_dev);
+       struct kobject *osd_kobj;
+
+       if (!mgs || !mgs->mgs_mntdev || !mgs->mgs_bottom)
+               return -ENODEV;
+
+       osd_kobj = &mgs->mgs_bottom->dd_kobj;
+       return lustre_attr_show(osd_kobj, mgs->mgs_mntdev, buf);
+}
+LUSTRE_RO_ATTR(mntdev);
+
+static struct attribute *mgs_attrs[] = {
+       &lustre_attr_fstype.attr,
+       &lustre_attr_mntdev.attr,
+       &lustre_attr_num_exports.attr,
+       NULL,
+};
 
 int lproc_mgs_setup(struct mgs_device *mgs, const char *osd_name)
 {
+       int osd_len = strlen(osd_name) - strlen("-osd");
        struct obd_device *obd = mgs->mgs_obd;
-       struct obd_device *osd_obd = mgs->mgs_bottom->dd_lu_dev.ld_obd;
-       int                osd_len = strlen(osd_name) - strlen("-osd");
-       int                rc;
-       struct lprocfs_static_vars lvars;
-
-       lprocfs_mgs_init_vars(&lvars);
-       rc = lprocfs_obd_setup(obd, lvars.obd_vars);
+       struct kobj_type *bottom_type;
+       struct obd_device *osd_obd;
+       int rc;
+       int i;
+
+       obd->obd_vars = lprocfs_mgs_obd_vars;
+       obd->obd_ktype.default_attrs = mgs_attrs;
+       rc = lprocfs_obd_setup(obd, true);
        if (rc != 0)
                GOTO(out, rc);
 
-        rc = lprocfs_obd_seq_create(obd, "filesystems", 0444,
-                                    &mgs_fs_fops, obd);
+       rc = ldebugfs_seq_create(obd->obd_debugfs_entry, "filesystems", 0444,
+                                &mgs_fs_fops, obd);
        if (rc != 0)
                GOTO(out, rc);
 
-       rc = lprocfs_obd_seq_create(obd, "srpc_rules", 0400,
-                                   &mgsself_srpc_fops, obd);
+       rc = ldebugfs_seq_create(obd->obd_debugfs_entry, "srpc_rules", 0400,
+                                &mgsself_srpc_fops, obd);
        if (rc != 0)
                GOTO(out, rc);
 
-        mgs->mgs_proc_live = lprocfs_register("live", obd->obd_proc_entry,
-                                              NULL, NULL);
+       mgs->mgs_proc_live = lprocfs_register("live", obd->obd_proc_entry,
+                                             NULL, NULL);
         if (IS_ERR(mgs->mgs_proc_live)) {
                 rc = PTR_ERR(mgs->mgs_proc_live);
                 mgs->mgs_proc_live = NULL;
                GOTO(out, rc);
         }
 
-        obd->obd_proc_exports_entry = lprocfs_register("exports",
-                                                       obd->obd_proc_entry,
-                                                       NULL, NULL);
+       obd->obd_proc_exports_entry = lprocfs_register("exports",
+                                                      obd->obd_proc_entry,
+                                                      NULL, NULL);
         if (IS_ERR(obd->obd_proc_exports_entry)) {
                 rc = PTR_ERR(obd->obd_proc_exports_entry);
                 obd->obd_proc_exports_entry = NULL;
                GOTO(out, rc);
         }
 
+       rc = sysfs_create_link(&obd->obd_kset.kobj, &mgs->mgs_bottom->dd_kobj,
+                              "osd");
+       if (rc) {
+               CWARN("%s: failed to create symlink osd -> %s, rc = %d\n",
+                     kobject_name(&obd->obd_kset.kobj),
+                     kobject_name(&mgs->mgs_bottom->dd_kobj), rc);
+               rc = 0;
+       }
+
+       bottom_type = get_ktype(&mgs->mgs_bottom->dd_kobj);
+
+       for (i = 0; bottom_type->default_attrs[i]; i++) {
+               if (strcmp(bottom_type->default_attrs[i]->name, "fstype") == 0) {
+                       mgs->mgs_fstype = bottom_type->default_attrs[i];
+                       break;
+               }
+       }
+
+       for (i = 0; bottom_type->default_attrs[i]; i++) {
+               if (strcmp(bottom_type->default_attrs[i]->name, "mntdev") == 0) {
+                       mgs->mgs_mntdev = bottom_type->default_attrs[i];
+                       break;
+               }
+       }
+
+       osd_obd = mgs->mgs_bottom->dd_lu_dev.ld_obd;
        mgs->mgs_proc_osd = lprocfs_add_symlink("osd",
                                                obd->obd_proc_entry,
                                                "../../%s/%.*s",
@@ -192,20 +332,7 @@ int lproc_mgs_setup(struct mgs_device *mgs, const char *osd_name)
                                                osd_len, /* Strip "-osd". */
                                                osd_name);
        if (mgs->mgs_proc_osd == NULL)
-               GOTO(out, rc = -ENOMEM);
-
-       mgs->mgs_proc_mntdev = lprocfs_add_symlink("mntdev",
-                                                  obd->obd_proc_entry,
-                                                  "osd/mntdev");
-       if (mgs->mgs_proc_mntdev == NULL)
-               GOTO(out, rc = -ENOMEM);
-
-       mgs->mgs_proc_fstype = lprocfs_add_symlink("fstype",
-                                                  obd->obd_proc_entry,
-                                                  "osd/fstype");
-       if (mgs->mgs_proc_fstype == NULL)
-               GOTO(out, rc = -ENOMEM);
-
+               rc = -ENOMEM;
 out:
        if (rc != 0)
                lproc_mgs_cleanup(mgs);
@@ -223,15 +350,10 @@ void lproc_mgs_cleanup(struct mgs_device *mgs)
        if (mgs->mgs_proc_osd != NULL)
                lprocfs_remove(&mgs->mgs_proc_osd);
 
-       if (mgs->mgs_proc_fstype != NULL)
-               lprocfs_remove(&mgs->mgs_proc_fstype);
-
-       if (mgs->mgs_proc_mntdev != NULL)
-               lprocfs_remove(&mgs->mgs_proc_mntdev);
+       sysfs_remove_link(&obd->obd_kset.kobj, "osd");
 
        if (mgs->mgs_proc_live != NULL) {
                /* Should be no live entries */
-               LASSERT(mgs->mgs_proc_live->subdir == NULL);
                lprocfs_remove(&mgs->mgs_proc_live);
                mgs->mgs_proc_live = NULL;
        }
@@ -242,92 +364,6 @@ void lproc_mgs_cleanup(struct mgs_device *mgs)
         lprocfs_free_md_stats(obd);
 }
 
-static int mgs_live_seq_show(struct seq_file *seq, void *v)
-{
-        struct fs_db             *fsdb = seq->private;
-        struct mgs_tgt_srpc_conf *srpc_tgt;
-        int i;
-
-       mutex_lock(&fsdb->fsdb_mutex);
-
-        seq_printf(seq, "fsname: %s\n", fsdb->fsdb_name);
-        seq_printf(seq, "flags: %#lx     gen: %d\n",
-                   fsdb->fsdb_flags, fsdb->fsdb_gen);
-        for (i = 0; i < INDEX_MAP_SIZE * 8; i++)
-               if (test_bit(i, fsdb->fsdb_mdt_index_map))
-                         seq_printf(seq, "%s-MDT%04x\n", fsdb->fsdb_name, i);
-        for (i = 0; i < INDEX_MAP_SIZE * 8; i++)
-               if (test_bit(i, fsdb->fsdb_ost_index_map))
-                         seq_printf(seq, "%s-OST%04x\n", fsdb->fsdb_name, i);
-
-        seq_printf(seq, "\nSecure RPC Config Rules:\n");
-#if 0
-        seq_printf(seq, "%s.%s=%s\n", fsdb->fsdb_name,
-                   PARAM_SRPC_UDESC, fsdb->fsdb_srpc_fl_udesc ? "yes" : "no");
-#endif
-        for (srpc_tgt = fsdb->fsdb_srpc_tgt; srpc_tgt;
-             srpc_tgt = srpc_tgt->mtsc_next) {
-                seq_show_srpc_rules(seq, srpc_tgt->mtsc_tgt,
-                                    &srpc_tgt->mtsc_rset);
-        }
-        seq_show_srpc_rules(seq, fsdb->fsdb_name, &fsdb->fsdb_srpc_gen);
-
-        lprocfs_rd_ir_state(seq, fsdb);
-
-       mutex_unlock(&fsdb->fsdb_mutex);
-        return 0;
-}
-
-static ssize_t mgs_live_seq_write(struct file *file, const char *buf,
-                                  size_t len, loff_t *off)
-{
-        struct seq_file *seq  = file->private_data;
-        struct fs_db    *fsdb = seq->private;
-        ssize_t rc;
-
-        rc = lprocfs_wr_ir_state(file, buf, len, fsdb);
-        if (rc >= 0)
-                rc = len;
-        return rc;
-}
-LPROC_SEQ_FOPS(mgs_live);
-
-int lproc_mgs_add_live(struct mgs_device *mgs, struct fs_db *fsdb)
-{
-        int rc;
-
-        if (!mgs->mgs_proc_live)
-                return 0;
-       rc = lprocfs_seq_create(mgs->mgs_proc_live, fsdb->fsdb_name, 0644,
-                               &mgs_live_fops, fsdb);
-
-        return 0;
-}
-
-int lproc_mgs_del_live(struct mgs_device *mgs, struct fs_db *fsdb)
-{
-        if (!mgs->mgs_proc_live)
-                return 0;
-
-       /* didn't create the proc file for MGSSELF_NAME */
-       if (!test_bit(FSDB_MGS_SELF, &fsdb->fsdb_flags))
-               lprocfs_remove_proc_entry(fsdb->fsdb_name, mgs->mgs_proc_live);
-        return 0;
-}
-
-struct lprocfs_vars lprocfs_mgs_obd_vars[] = {
-        { "uuid",            lprocfs_rd_uuid,        0, 0 },
-        { "num_exports",     lprocfs_rd_num_exports, 0, 0 },
-        { "hash_stats",      lprocfs_obd_rd_hash,    0, 0 },
-        { "evict_client",    0, lprocfs_wr_evict_client, 0 },
-        { "ir_timeout",      lprocfs_rd_ir_timeout, lprocfs_wr_ir_timeout, 0 },
-        { 0 }
-};
-
-struct lprocfs_vars lprocfs_mgs_module_vars[] = {
-        { 0 }
-};
-
 void mgs_counter_incr(struct obd_export *exp, int opcode)
 {
         lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
@@ -345,10 +381,4 @@ void mgs_stats_counter_init(struct lprocfs_stats *stats)
         lprocfs_counter_init(stats, LPROC_MGS_TARGET_REG, 0, "tgtreg", "reqs");
         lprocfs_counter_init(stats, LPROC_MGS_TARGET_DEL, 0, "tgtdel", "reqs");
 }
-
-void lprocfs_mgs_init_vars(struct lprocfs_static_vars *lvars)
-{
-    lvars->module_vars  = lprocfs_mgs_module_vars;
-    lvars->obd_vars     = lprocfs_mgs_obd_vars;
-}
 #endif