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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Lustre Management Server (MGS) filesystem interface code
40 * Author: Nathan Rutman <nathan@clusterfs.com>
41 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
44 #define DEBUG_SUBSYSTEM S_MGS
46 #include <lustre_fid.h>
47 #include "mgs_internal.h"
49 int mgs_export_stats_init(struct obd_device *obd, struct obd_export *exp,
52 lnet_nid_t *client_nid = localdata;
57 rc = lprocfs_exp_setup(exp, client_nid, &is_new_nid);
59 /* Mask error for already created /proc entries */
68 tmp = exp->exp_nid_stats;
69 tmp->nid_stats = lprocfs_alloc_stats(NUM_OBD_STATS + LPROC_MGS_LAST,
70 LPROCFS_STATS_FLAG_NOPERCPU);
71 if (tmp->nid_stats == NULL)
72 GOTO(out, rc = -ENOMEM);
74 lprocfs_init_ops_stats(LPROC_MGS_LAST, tmp->nid_stats);
75 mgs_stats_counter_init(tmp->nid_stats);
76 rc = lprocfs_register_stats(tmp->nid_proc, "stats", tmp->nid_stats);
80 rc = lprocfs_nid_ldlm_stats_init(tmp);
90 * Add client export data to the MGS. This data is currently NOT stored on
91 * disk in the last_rcvd file or anywhere else. In the event of a MGS
92 * crash all connections are treated as new connections.
94 int mgs_client_add(struct obd_device *obd, struct obd_export *exp,
100 /* Remove client export data from the MGS */
101 int mgs_client_free(struct obd_export *exp)
106 int mgs_fs_setup(const struct lu_env *env, struct mgs_device *mgs)
111 struct dt_object *root;
116 OBD_SET_CTXT_MAGIC(&mgs->mgs_obd->obd_lvfs_ctxt);
117 mgs->mgs_obd->obd_lvfs_ctxt.dt = mgs->mgs_bottom;
119 /* XXX: fix when support for N:1 layering is implemented */
120 LASSERT(mgs->mgs_dt_dev.dd_lu_dev.ld_site);
121 mgs->mgs_dt_dev.dd_lu_dev.ld_site->ls_top_dev =
122 &mgs->mgs_dt_dev.dd_lu_dev;
124 /* Setup the configs dir */
125 fid.f_seq = FID_SEQ_LOCAL_NAME;
128 rc = local_oid_storage_init(env, mgs->mgs_bottom, &fid, &mgs->mgs_los);
132 rc = dt_root_get(env, mgs->mgs_bottom, &rfid);
136 root = dt_locate_at(env, mgs->mgs_bottom, &rfid,
137 &mgs->mgs_dt_dev.dd_lu_dev, NULL);
138 if (unlikely(IS_ERR(root)))
139 GOTO(out_los, rc = PTR_ERR(root));
141 o = local_file_find_or_create(env, mgs->mgs_los, root,
143 S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
145 GOTO(out_root, rc = PTR_ERR(o));
147 if (!dt_try_as_dir(env, o)) {
148 lu_object_put(env, &o->do_lu);
149 GOTO(out_root, rc = -ENOTDIR);
152 mgs->mgs_configs_dir = o;
154 /* create directory to store nid table versions */
155 o = local_file_find_or_create(env, mgs->mgs_los, root, MGS_NIDTBL_DIR,
156 S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
158 lu_object_put(env, &mgs->mgs_configs_dir->do_lu);
159 mgs->mgs_configs_dir = NULL;
160 GOTO(out_root, rc = PTR_ERR(o));
163 mgs->mgs_nidtbl_dir = o;
166 lu_object_put(env, &root->do_lu);
169 local_oid_storage_fini(env, mgs->mgs_los);
173 mgs->mgs_dt_dev.dd_lu_dev.ld_site->ls_top_dev = NULL;
178 int mgs_fs_cleanup(const struct lu_env *env, struct mgs_device *mgs)
180 class_disconnect_exports(mgs->mgs_obd); /* cleans up client info too */
182 if (mgs->mgs_configs_dir) {
183 lu_object_put(env, &mgs->mgs_configs_dir->do_lu);
184 mgs->mgs_configs_dir = NULL;
186 if (mgs->mgs_nidtbl_dir) {
187 lu_object_put(env, &mgs->mgs_nidtbl_dir->do_lu);
188 mgs->mgs_nidtbl_dir = NULL;
191 local_oid_storage_fini(env, mgs->mgs_los);