lustre/fid/lproc_fid.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  37  *
  38  * lustre/fid/lproc_fid.c
  39  *
  40  * Lustre Sequence Manager
  41  *
  42  * Author: Yury Umanets <umka@clusterfs.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_FID
  46
  47 #ifdef __KERNEL__
  48 # include <libcfs/libcfs.h>
  49 # include <linux/module.h>
  50 #else /* __KERNEL__ */
  51 # include <liblustre.h>
  52 #endif
  53
  54 #include <obd.h>
  55 #include <obd_class.h>
  56 #include <dt_object.h>
  57 #include <md_object.h>
  58 #include <obd_support.h>
  59 #include <lustre_req_layout.h>
  60 #include <lustre_fid.h>
  61 #include "fid_internal.h"
  62
  63 #ifdef LPROCFS
  64 /*
  65  * Note: this function is only used for testing, it is no safe for production
  66  * use.
  67  */
  68 static int
  69 seq_proc_write_common(struct file *file, const char *buffer,
  70                       unsigned long count, void *data,
  71                       struct lu_seq_range *range)
  72 {
  73         struct lu_seq_range tmp;
  74         int rc;
  75         ENTRY;
  76
  77         LASSERT(range != NULL);
  78
  79         rc = sscanf(buffer, "[%llx - %llx]\n",
  80                     (long long unsigned *)&tmp.lsr_start,
  81                     (long long unsigned *)&tmp.lsr_end);
  82         if (rc != 2 || !range_is_sane(&tmp) || range_is_zero(&tmp))
  83                 RETURN(-EINVAL);
  84         *range = tmp;
  85         RETURN(0);
  86 }
  87
  88 static int
  89 seq_proc_read_common(char *page, char **start, off_t off,
  90                      int count, int *eof, void *data,
  91                      struct lu_seq_range *range)
  92 {
  93         int rc;
  94         ENTRY;
  95
  96         *eof = 1;
  97         rc = snprintf(page, count, "["LPX64" - "LPX64"]:%x:%s\n",
  98                         PRANGE(range));
  99         RETURN(rc);
 100 }
 101
 102 /*
 103  * Server side procfs stuff.
 104  */
 105 static int
 106 seq_server_proc_write_space(struct file *file, const char *buffer,
 107                             unsigned long count, void *data)
 108 {
 109         struct lu_server_seq *seq = (struct lu_server_seq *)data;
 110         int rc;
 111         ENTRY;
 112
 113         LASSERT(seq != NULL);
 114
 115         cfs_mutex_lock(&seq->lss_mutex);
 116         rc = seq_proc_write_common(file, buffer, count,
 117                                    data, &seq->lss_space);
 118         if (rc == 0) {
 119                 CDEBUG(D_INFO, "%s: Space: "DRANGE"\n",
 120                        seq->lss_name, PRANGE(&seq->lss_space));
 121         }
 122
 123         cfs_mutex_unlock(&seq->lss_mutex);
 124
 125         RETURN(count);
 126 }
 127
 128 static int
 129 seq_server_proc_read_space(char *page, char **start, off_t off,
 130                            int count, int *eof, void *data)
 131 {
 132         struct lu_server_seq *seq = (struct lu_server_seq *)data;
 133         int rc;
 134         ENTRY;
 135
 136         LASSERT(seq != NULL);
 137
 138         cfs_mutex_lock(&seq->lss_mutex);
 139         rc = seq_proc_read_common(page, start, off, count, eof,
 140                                   data, &seq->lss_space);
 141         cfs_mutex_unlock(&seq->lss_mutex);
 142
 143         RETURN(rc);
 144 }
 145
 146 static int
 147 seq_server_proc_read_server(char *page, char **start, off_t off,
 148                             int count, int *eof, void *data)
 149 {
 150         struct lu_server_seq *seq = (struct lu_server_seq *)data;
 151         struct client_obd *cli;
 152         int rc;
 153         ENTRY;
 154
 155         LASSERT(seq != NULL);
 156
 157         *eof = 1;
 158         if (seq->lss_cli) {
 159                 if (seq->lss_cli->lcs_exp != NULL) {
 160                         cli = &seq->lss_cli->lcs_exp->exp_obd->u.cli;
 161                         rc = snprintf(page, count, "%s\n",
 162                                       cli->cl_target_uuid.uuid);
 163                 } else {
 164                         rc = snprintf(page, count, "%s\n",
 165                                       seq->lss_cli->lcs_srv->lss_name);
 166                 }
 167         } else {
 168                 rc = snprintf(page, count, "<none>\n");
 169         }
 170
 171         RETURN(rc);
 172 }
 173
 174 static int
 175 seq_server_proc_write_width(struct file *file, const char *buffer,
 176                             unsigned long count, void *data)
 177 {
 178         struct lu_server_seq *seq = (struct lu_server_seq *)data;
 179         int rc, val;
 180         ENTRY;
 181
 182         LASSERT(seq != NULL);
 183
 184         cfs_mutex_lock(&seq->lss_mutex);
 185
 186         rc = lprocfs_write_helper(buffer, count, &val);
 187         if (rc != 0) {
 188                 CERROR("%s: invalid width.\n", seq->lss_name);
 189                 GOTO(out_unlock, rc);
 190         }
 191
 192         seq->lss_width = val;
 193
 194         CDEBUG(D_INFO, "%s: Width: "LPU64"\n",
 195                seq->lss_name, seq->lss_width);
 196 out_unlock:
 197         cfs_mutex_unlock(&seq->lss_mutex);
 198
 199         RETURN(count);
 200 }
 201
 202 static int
 203 seq_server_proc_read_width(char *page, char **start, off_t off,
 204                            int count, int *eof, void *data)
 205 {
 206         struct lu_server_seq *seq = (struct lu_server_seq *)data;
 207         int rc;
 208         ENTRY;
 209
 210         LASSERT(seq != NULL);
 211
 212         cfs_mutex_lock(&seq->lss_mutex);
 213         rc = snprintf(page, count, LPU64"\n", seq->lss_width);
 214         cfs_mutex_unlock(&seq->lss_mutex);
 215
 216         RETURN(rc);
 217 }
 218
 219 /* Client side procfs stuff */
 220 static int
 221 seq_client_proc_write_space(struct file *file, const char *buffer,
 222                             unsigned long count, void *data)
 223 {
 224         struct lu_client_seq *seq = (struct lu_client_seq *)data;
 225         int rc;
 226         ENTRY;
 227
 228         LASSERT(seq != NULL);
 229
 230         cfs_mutex_lock(&seq->lcs_mutex);
 231         rc = seq_proc_write_common(file, buffer, count,
 232                                    data, &seq->lcs_space);
 233
 234         if (rc == 0) {
 235                 CDEBUG(D_INFO, "%s: Space: "DRANGE"\n",
 236                        seq->lcs_name, PRANGE(&seq->lcs_space));
 237         }
 238
 239         cfs_mutex_unlock(&seq->lcs_mutex);
 240
 241         RETURN(count);
 242 }
 243
 244 static int
 245 seq_client_proc_read_space(char *page, char **start, off_t off,
 246                            int count, int *eof, void *data)
 247 {
 248         struct lu_client_seq *seq = (struct lu_client_seq *)data;
 249         int rc;
 250         ENTRY;
 251
 252         LASSERT(seq != NULL);
 253
 254         cfs_mutex_lock(&seq->lcs_mutex);
 255         rc = seq_proc_read_common(page, start, off, count, eof,
 256                                   data, &seq->lcs_space);
 257         cfs_mutex_unlock(&seq->lcs_mutex);
 258
 259         RETURN(rc);
 260 }
 261
 262 static int
 263 seq_client_proc_write_width(struct file *file, const char *buffer,
 264                             unsigned long count, void *data)
 265 {
 266         struct lu_client_seq *seq = (struct lu_client_seq *)data;
 267         int rc, val;
 268         ENTRY;
 269
 270         LASSERT(seq != NULL);
 271
 272         cfs_mutex_lock(&seq->lcs_mutex);
 273
 274         rc = lprocfs_write_helper(buffer, count, &val);
 275         if (rc) {
 276                 cfs_mutex_unlock(&seq->lcs_mutex);
 277                 RETURN(rc);
 278         }
 279
 280         if (val <= LUSTRE_SEQ_MAX_WIDTH && val > 0) {
 281                 seq->lcs_width = val;
 282
 283                 if (rc == 0) {
 284                         CDEBUG(D_INFO, "%s: Sequence size: "LPU64"\n",
 285                                seq->lcs_name, seq->lcs_width);
 286                 }
 287         }
 288
 289         cfs_mutex_unlock(&seq->lcs_mutex);
 290
 291         RETURN(count);
 292 }
 293
 294 static int
 295 seq_client_proc_read_width(char *page, char **start, off_t off,
 296                            int count, int *eof, void *data)
 297 {
 298         struct lu_client_seq *seq = (struct lu_client_seq *)data;
 299         int rc;
 300         ENTRY;
 301
 302         LASSERT(seq != NULL);
 303
 304         cfs_mutex_lock(&seq->lcs_mutex);
 305         rc = snprintf(page, count, LPU64"\n", seq->lcs_width);
 306         cfs_mutex_unlock(&seq->lcs_mutex);
 307
 308         RETURN(rc);
 309 }
 310
 311 static int
 312 seq_client_proc_read_fid(char *page, char **start, off_t off,
 313                          int count, int *eof, void *data)
 314 {
 315         struct lu_client_seq *seq = (struct lu_client_seq *)data;
 316         int rc;
 317         ENTRY;
 318
 319         LASSERT(seq != NULL);
 320
 321         cfs_mutex_lock(&seq->lcs_mutex);
 322         rc = snprintf(page, count, DFID"\n", PFID(&seq->lcs_fid));
 323         cfs_mutex_unlock(&seq->lcs_mutex);
 324
 325         RETURN(rc);
 326 }
 327
 328 static int
 329 seq_client_proc_read_server(char *page, char **start, off_t off,
 330                             int count, int *eof, void *data)
 331 {
 332         struct lu_client_seq *seq = (struct lu_client_seq *)data;
 333         struct client_obd *cli;
 334         int rc;
 335         ENTRY;
 336
 337         LASSERT(seq != NULL);
 338
 339         if (seq->lcs_exp != NULL) {
 340                 cli = &seq->lcs_exp->exp_obd->u.cli;
 341                 rc = snprintf(page, count, "%s\n", cli->cl_target_uuid.uuid);
 342         } else {
 343                 rc = snprintf(page, count, "%s\n", seq->lcs_srv->lss_name);
 344         }
 345         RETURN(rc);
 346 }
 347
 348 struct lprocfs_vars seq_server_proc_list[] = {
 349         { "space",    seq_server_proc_read_space, seq_server_proc_write_space, NULL },
 350         { "width",    seq_server_proc_read_width, seq_server_proc_write_width, NULL },
 351         { "server",   seq_server_proc_read_server, NULL, NULL },
 352         { NULL }};
 353
 354 struct lprocfs_vars seq_client_proc_list[] = {
 355         { "space",    seq_client_proc_read_space, seq_client_proc_write_space, NULL },
 356         { "width",    seq_client_proc_read_width, seq_client_proc_write_width, NULL },
 357         { "server",   seq_client_proc_read_server, NULL, NULL },
 358         { "fid",      seq_client_proc_read_fid, NULL, NULL },
 359         { NULL }};
 360 #endif