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LU-3789 mgs: Add deprecation warning for "lctl conf_param"
[fs/lustre-release.git] / lustre / utils / lustre_cfg.c
index cc29553..1c9ed42 100644 (file)
@@ -1,35 +1,53 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
  *
- *  Copyright (C) 2002 Cluster File Systems, Inc.
- *   Author: Peter J. Braam <braam@clusterfs.com>
- *   Author: Phil Schwan <phil@clusterfs.com>
- *   Author: Andreas Dilger <adilger@clusterfs.com>
- *   Author: Robert Read <rread@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
  *
- *   Lustre is free software; you can redistribute it and/or
- *   modify it under the terms of version 2 of the GNU General Public
- *   License as published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
  *
- *   Lustre is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
+ * 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
  *
- *   You should have received a copy of the GNU General Public License
- *   along with Lustre; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
  *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/utils/lustre_cfg.c
+ *
+ * Author: Peter J. Braam <braam@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ * Author: Robert Read <rread@clusterfs.com>
  */
-
 
 #include <stdlib.h>
 #include <sys/ioctl.h>
+#include <sys/stat.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <ctype.h>
+#include <glob.h>
 
 #ifndef __KERNEL__
 #include <liblustre.h>
@@ -40,7 +58,7 @@
 #include <lustre_dlm.h>
 #include <obd.h>          /* for struct lov_stripe_md */
 #include <obd_lov.h>
-#include <linux/lustre_build_version.h>
+#include <lustre/lustre_build_version.h>
 
 #include <unistd.h>
 #include <sys/un.h>
 
 #include "obdctl.h"
 #include <lnet/lnetctl.h>
-#include "parser.h"
+#include <libcfs/libcfsutil.h>
 #include <stdio.h>
 
 static char * lcfg_devname;
 
 int lcfg_set_devname(char *name)
 {
+        char *ptr;
+        int digit = 1;
+
         if (name) {
                 if (lcfg_devname)
                         free(lcfg_devname);
                 /* quietly strip the unnecessary '$' */
                 if (*name == '$' || *name == '%')
                         name++;
-                if (isdigit(*name)) { 
+
+                ptr = name;
+                while (*ptr != '\0') {
+                        if (!isdigit(*ptr)) {
+                            digit = 0;
+                            break;
+                        }
+                        ptr++;
+                }
+
+                if (digit) {
                         /* We can't translate from dev # to name */
                         lcfg_devname = NULL;
                 } else {
@@ -73,7 +104,7 @@ int lcfg_set_devname(char *name)
                 }
         } else {
                 lcfg_devname = NULL;
-        } 
+        }
         return 0;
 }
 
@@ -108,19 +139,6 @@ int jt_lcfg_attach(int argc, char **argv)
         if (rc < 0) {
                 fprintf(stderr, "error: %s: LCFG_ATTACH %s\n",
                         jt_cmdname(argv[0]), strerror(rc = errno));
-        } else if (argc == 3) {
-                char name[1024];
-
-                lcfg_set_devname(argv[2]);
-                if (strlen(argv[2]) > 128) {
-                        printf("Name too long to set environment\n");
-                        return -EINVAL;
-                }
-                snprintf(name, 512, "LUSTRE_DEV_%s", argv[2]);
-                rc = setenv(name, argv[1], 1);
-                if (rc) {
-                        printf("error setting env variable %s\n", name);
-                }
         } else {
                 lcfg_set_devname(argv[2]);
         }
@@ -137,8 +155,8 @@ int jt_lcfg_setup(int argc, char **argv)
 
         if (lcfg_devname == NULL) {
                 fprintf(stderr, "%s: please use 'device name' to set the "
-                        "device name for config commands.\n", 
-                        jt_cmdname(argv[0])); 
+                        "device name for config commands.\n",
+                        jt_cmdname(argv[0]));
                 return -EINVAL;
         }
 
@@ -169,8 +187,8 @@ int jt_obd_detach(int argc, char **argv)
 
         if (lcfg_devname == NULL) {
                 fprintf(stderr, "%s: please use 'device name' to set the "
-                        "device name for config commands.\n", 
-                        jt_cmdname(argv[0])); 
+                        "device name for config commands.\n",
+                        jt_cmdname(argv[0]));
                 return -EINVAL;
         }
 
@@ -201,8 +219,8 @@ int jt_obd_cleanup(int argc, char **argv)
 
         if (lcfg_devname == NULL) {
                 fprintf(stderr, "%s: please use 'device name' to set the "
-                        "device name for config commands.\n", 
-                        jt_cmdname(argv[0])); 
+                        "device name for config commands.\n",
+                        jt_cmdname(argv[0]));
                 return -EINVAL;
         }
 
@@ -239,8 +257,8 @@ int jt_obd_cleanup(int argc, char **argv)
         return rc;
 }
 
-static 
-int do_add_uuid(char * func, char *uuid, lnet_nid_t nid) 
+static
+int do_add_uuid(char * func, char *uuid, lnet_nid_t nid)
 {
         int rc;
         struct lustre_cfg_bufs bufs;
@@ -252,7 +270,7 @@ int do_add_uuid(char * func, char *uuid, lnet_nid_t nid)
 
         lcfg = lustre_cfg_new(LCFG_ADD_UUID, &bufs);
         lcfg->lcfg_nid = nid;
-        /* Poison NAL -- pre 1.4.6 will LASSERT on 0 NAL, this way it 
+        /* Poison NAL -- pre 1.4.6 will LASSERT on 0 NAL, this way it
            doesn't work without crashing (bz 10130) */
         lcfg->lcfg_nal = 0x5a;
 
@@ -275,8 +293,8 @@ int do_add_uuid(char * func, char *uuid, lnet_nid_t nid)
 int jt_lcfg_add_uuid(int argc, char **argv)
 {
         lnet_nid_t nid;
-        
-        if (argc != 3) {                
+
+        if (argc != 3) {
                 return CMD_HELP;
         }
 
@@ -308,7 +326,7 @@ int jt_lcfg_del_uuid(int argc, char **argv)
         lustre_cfg_bufs_reset(&bufs, lcfg_devname);
         if (strcmp (argv[1], "_all_"))
                 lustre_cfg_bufs_set_string(&bufs, 1, argv[1]);
-        
+
         lcfg = lustre_cfg_new(LCFG_DEL_UUID, &bufs);
         rc = lcfg_ioctl(argv[0], OBD_DEV_ID, lcfg);
         lustre_cfg_free(lcfg);
@@ -320,9 +338,6 @@ int jt_lcfg_del_uuid(int argc, char **argv)
         return 0;
 }
 
-
-
-
 int jt_lcfg_del_mount_option(int argc, char **argv)
 {
         int rc;
@@ -365,7 +380,7 @@ int jt_lcfg_set_timeout(int argc, char **argv)
         lustre_cfg_bufs_reset(&bufs, lcfg_devname);
         lcfg = lustre_cfg_new(LCFG_SET_TIMEOUT, &bufs);
         lcfg->lcfg_num = atoi(argv[1]);
-        
+
         rc = lcfg_ioctl(argv[0], OBD_DEV_ID, lcfg);
         //rc = lcfg_mgs_ioctl(argv[0], OBD_DEV_ID, lcfg);
 
@@ -377,8 +392,6 @@ int jt_lcfg_set_timeout(int argc, char **argv)
         return rc;
 }
 
-
-
 int jt_lcfg_add_conn(int argc, char **argv)
 {
         struct lustre_cfg_bufs bufs;
@@ -395,8 +408,8 @@ int jt_lcfg_add_conn(int argc, char **argv)
 
         if (lcfg_devname == NULL) {
                 fprintf(stderr, "%s: please use 'device name' to set the "
-                        "device name for config commands.\n", 
-                        jt_cmdname(argv[0])); 
+                        "device name for config commands.\n",
+                        jt_cmdname(argv[0]));
                 return -EINVAL;
         }
 
@@ -428,8 +441,8 @@ int jt_lcfg_del_conn(int argc, char **argv)
 
         if (lcfg_devname == NULL) {
                 fprintf(stderr, "%s: please use 'device name' to set the "
-                        "device name for config commands.\n", 
-                        jt_cmdname(argv[0])); 
+                        "device name for config commands.\n",
+                        jt_cmdname(argv[0]));
                 return -EINVAL;
         }
 
@@ -467,7 +480,7 @@ int jt_lcfg_param(int argc, char **argv)
         }
 
         lcfg = lustre_cfg_new(LCFG_PARAM, &bufs);
-        
+
         rc = lcfg_ioctl(argv[0], OBD_DEV_ID, lcfg);
         lustre_cfg_free(lcfg);
         if (rc < 0) {
@@ -477,21 +490,131 @@ int jt_lcfg_param(int argc, char **argv)
         return rc;
 }
 
+struct param_opts {
+       unsigned int po_only_path:1;
+       unsigned int po_show_path:1;
+       unsigned int po_show_type:1;
+       unsigned int po_recursive:1;
+       unsigned int po_params2:1;
+       unsigned int po_delete:1;
+};
+
+/* Param set to single log file, used by all clients and servers.
+ * This should be loaded after the individual config logs.
+ * Called from set param with -P option.
+ */
+static int jt_lcfg_mgsparam2(int argc, char **argv, struct param_opts *popt)
+{
+       int     rc, i;
+       int     first_param;
+       struct  lustre_cfg_bufs bufs;
+       struct  lustre_cfg *lcfg;
+       char    *buf = NULL;
+       int     len;
+
+       first_param = optind;
+       if (first_param < 0 || first_param >= argc)
+               return CMD_HELP;
+
+       for (i = first_param, rc = 0; i < argc; i++) {
+               lustre_cfg_bufs_reset(&bufs, NULL);
+               /* This same command would be executed on all nodes, many
+                * of which should fail (silently) because they don't have
+                * that proc file existing locally. There would be no
+                * preprocessing on the MGS to try to figure out which
+                * parameter files to add this to, there would be nodes
+                * processing on the cluster nodes to try to figure out
+                * if they are the intended targets. They will blindly
+                * try to set the parameter, and ENOTFOUND means it wasn't
+                * for them.
+                * Target name "general" means call on all targets. It is
+                * left here in case some filtering will be added in
+                * future.
+                */
+               lustre_cfg_bufs_set_string(&bufs, 0, "general");
+
+               len = strlen(argv[i]);
+
+               /* put an '=' on the end in case it doesn't have one */
+               if (popt->po_delete && argv[i][len - 1] != '=') {
+                       buf = malloc(len + 1);
+                       sprintf(buf, "%s=", argv[i]);
+               } else {
+                       buf = argv[i];
+               }
+               lustre_cfg_bufs_set_string(&bufs, 1, buf);
+
+               lcfg = lustre_cfg_new(LCFG_SET_PARAM, &bufs);
+               if (IS_ERR(lcfg)) {
+                       fprintf(stderr, "error: allocating lcfg for %s: %s\n",
+                               jt_cmdname(argv[0]), strerror(PTR_ERR(lcfg)));
+                       if (rc == 0)
+                                rc = PTR_ERR(lcfg);
+               } else {
+                       int rc2 = lcfg_mgs_ioctl(argv[0], OBD_DEV_ID, lcfg);
+                       if (rc2 != 0) {
+                               fprintf(stderr, "error: executing %s: %s\n",
+                                       jt_cmdname(argv[0]), strerror(rc2));
+                               if (rc == 0)
+                                       rc = rc2;
+                       }
+                       lustre_cfg_free(lcfg);
+               }
+               if (buf != argv[i])
+                       free(buf);
+       }
+
+       return rc;
+}
+
 /* Param set in config log on MGS */
-/* conf_param key1=value1 [key2=value2...] */
+/* conf_param key=value */
+/* Note we can actually send mgc conf_params from clients, but currently
+ * that's only done for default file striping (see ll_send_mgc_param),
+ * and not here. */
+/* After removal of a parameter (-d) Lustre will use the default
+ * AT NEXT REBOOT, not immediately. */
 int jt_lcfg_mgsparam(int argc, char **argv)
 {
-        int i, rc;
+        int rc;
+        int del = 0;
         struct lustre_cfg_bufs bufs;
         struct lustre_cfg *lcfg;
+        char *buf = NULL;
+
+#if LUSTRE_VERSION >= OBD_OCD_VERSION(2,7,53,0)
+       fprintf(stderr, "warning: 'lctl conf_param' is deprecated, "
+               "use 'lctl set_param -P' instead\n");
+#endif
 
-        if ((argc >= LUSTRE_CFG_MAX_BUFCOUNT) || (argc <= 1))
+        /* mgs_setparam processes only lctl buf #1 */
+        if ((argc > 3) || (argc <= 1))
                 return CMD_HELP;
 
-        lustre_cfg_bufs_reset(&bufs, NULL);
+        while ((rc = getopt(argc, argv, "d")) != -1) {
+                switch (rc) {
+                        case 'd':
+                                del = 1;
+                                break;
+                        default:
+                                return CMD_HELP;
+                }
+        }
 
-        for (i = 1; i < argc; i++) {
-                lustre_cfg_bufs_set_string(&bufs, i, argv[i]);
+        lustre_cfg_bufs_reset(&bufs, NULL);
+        if (del) {
+                char *ptr;
+
+                /* for delete, make it "<param>=\0" */
+                buf = malloc(strlen(argv[optind]) + 2);
+                /* put an '=' on the end in case it doesn't have one */
+                sprintf(buf, "%s=", argv[optind]);
+                /* then truncate after the first '=' */
+                ptr = strchr(buf, '=');
+                *(++ptr) = '\0';
+                lustre_cfg_bufs_set_string(&bufs, 1, buf);
+        } else {
+                lustre_cfg_bufs_set_string(&bufs, 1, argv[optind]);
         }
 
         /* We could put other opcodes here. */
@@ -499,12 +622,484 @@ int jt_lcfg_mgsparam(int argc, char **argv)
 
         rc = lcfg_mgs_ioctl(argv[0], OBD_DEV_ID, lcfg);
         lustre_cfg_free(lcfg);
+        if (buf)
+                free(buf);
         if (rc < 0) {
                 fprintf(stderr, "error: %s: %s\n", jt_cmdname(argv[0]),
                         strerror(rc = errno));
         }
-        
+
         return rc;
 }
 
+/* Display the path in the same format as sysctl
+ * For eg. obdfilter.lustre-OST0000.stats */
+static char *display_name(char *filename, unsigned int po_show_type)
+{
+        char *tmp;
+        struct stat st;
+
+        if (po_show_type) {
+                if (lstat(filename, &st) < 0)
+                        return NULL;
+        }
+
+        filename += strlen("/proc/");
+        if (strncmp(filename, "fs/", strlen("fs/")) == 0)
+                filename += strlen("fs/");
+        else
+                filename += strlen("sys/");
+
+        if (strncmp(filename, "lustre/", strlen("lustre/")) == 0)
+                filename += strlen("lustre/");
+        else if (strncmp(filename, "lnet/", strlen("lnet/")) == 0)
+                filename += strlen("lnet/");
+
+        /* replace '/' with '.' to match conf_param and sysctl */
+        tmp = filename;
+        while ((tmp = strchr(tmp, '/')) != NULL)
+                *tmp = '.';
+
+        /* append the indicator to entries */
+        if (po_show_type) {
+                if (S_ISDIR(st.st_mode))
+                        strcat(filename, "/");
+                else if (S_ISLNK(st.st_mode))
+                        strcat(filename, "@");
+                else if (st.st_mode & S_IWUSR)
+                        strcat(filename, "=");
+        }
+
+        return filename;
+}
+
+/* Find a character in a length limited string */
+/* BEWARE - kernel definition of strnchr has args in different order! */
+static char *strnchr(const char *p, char c, size_t n)
+{
+       if (!p)
+               return (0);
+
+       while (n-- > 0) {
+               if (*p == c)
+                       return ((char *)p);
+               p++;
+       }
+       return (0);
+}
+
+static char *globerrstr(int glob_rc)
+{
+        switch(glob_rc) {
+        case GLOB_NOSPACE:
+                return "Out of memory";
+        case GLOB_ABORTED:
+                return "Read error";
+        case GLOB_NOMATCH:
+                return "Found no match";
+        }
+        return "Unknown error";
+}
+
+static void clean_path(char *path)
+{
+        char *tmp;
+
+        /* If the input is in form Eg. obdfilter.*.stats */
+        if (strchr(path, '.')) {
+                tmp = path;
+                while (*tmp != '\0') {
+                        if ((*tmp == '.') &&
+                            (tmp != path) && (*(tmp - 1) != '\\'))
+                                *tmp = '/';
+                        tmp ++;
+                }
+        }
+        /* get rid of '\', glob doesn't like it */
+        if ((tmp = strrchr(path, '\\')) != NULL) {
+                char *tail = path + strlen(path);
+                while (tmp != path) {
+                        if (*tmp == '\\') {
+                                memmove(tmp, tmp + 1, tail - tmp);
+                                --tail;
+                        }
+                        --tmp;
+                }
+        }
+}
+
+/* Supporting file paths creates perilous behavoir: LU-888.
+ * Path support is deprecated.
+ * If a path is supplied it must begin with /proc.  */
+static void lprocfs_param_pattern(const char *cmd, const char *path, char *buf,
+        size_t buf_size)
+{
+        /* test path to see if it begins with '/proc/' */
+        if (strncmp(path, "/proc/", strlen("/proc/")) == 0) {
+                static int warned;
+                if (!warned) {
+                        fprintf(stderr, "%s: specifying parameters via "
+                                "full paths is deprecated.\n", cmd);
+#if LUSTRE_VERSION_CODE >= OBD_OCD_VERSION(2, 6, 50, 0)
+#warning "remove deprecated full path tunable access"
+#endif
+                        warned = 1;
+                }
+                snprintf(buf, buf_size, "%s", path);
+        } else {
+                snprintf(buf, buf_size, "/proc/{fs,sys}/{lnet,lustre}/%s",
+                        path);
+        }
+}
+
+static int listparam_cmdline(int argc, char **argv, struct param_opts *popt)
+{
+        int ch;
+
+        popt->po_show_path = 1;
+        popt->po_only_path = 1;
+        popt->po_show_type = 0;
+        popt->po_recursive = 0;
+
+        while ((ch = getopt(argc, argv, "FR")) != -1) {
+                switch (ch) {
+                case 'F':
+                        popt->po_show_type = 1;
+                        break;
+                case 'R':
+                        popt->po_recursive = 1;
+                        break;
+                default:
+                        return -1;
+                }
+        }
+
+        return optind;
+}
+
+static int listparam_display(struct param_opts *popt, char *pattern)
+{
+        int rc;
+        int i;
+        glob_t glob_info;
+        char filename[PATH_MAX + 1];    /* extra 1 byte for file type */
+
+        rc = glob(pattern, GLOB_BRACE | (popt->po_recursive ? GLOB_MARK : 0),
+                  NULL, &glob_info);
+        if (rc) {
+                fprintf(stderr, "error: list_param: %s: %s\n",
+                        pattern, globerrstr(rc));
+                return -ESRCH;
+        }
+
+        for (i = 0; i  < glob_info.gl_pathc; i++) {
+                char *valuename = NULL;
+                int last;
+
+                /* Trailing '/' will indicate recursion into directory */
+                last = strlen(glob_info.gl_pathv[i]) - 1;
+
+                /* Remove trailing '/' or it will be converted to '.' */
+                if (last > 0 && glob_info.gl_pathv[i][last] == '/')
+                        glob_info.gl_pathv[i][last] = '\0';
+                else
+                        last = 0;
+                strcpy(filename, glob_info.gl_pathv[i]);
+                valuename = display_name(filename, popt->po_show_type);
+                if (valuename)
+                        printf("%s\n", valuename);
+                if (last) {
+                        strcpy(filename, glob_info.gl_pathv[i]);
+                        strcat(filename, "/*");
+                        listparam_display(popt, filename);
+                }
+        }
+
+        globfree(&glob_info);
+        return rc;
+}
+
+int jt_lcfg_listparam(int argc, char **argv)
+{
+        int rc = 0, i;
+        struct param_opts popt;
+        char pattern[PATH_MAX];
+        char *path;
+
+        rc = listparam_cmdline(argc, argv, &popt);
+        if (rc == argc && popt.po_recursive) {
+                rc--;           /* we know at least "-R" is a parameter */
+                argv[rc] = "*";
+        } else if (rc < 0 || rc >= argc) {
+                return CMD_HELP;
+        }
+
+        for (i = rc; i < argc; i++) {
+                path = argv[i];
+
+                clean_path(path);
+
+                lprocfs_param_pattern(argv[0], path, pattern, sizeof(pattern));
+
+                rc = listparam_display(&popt, pattern);
+                if (rc < 0)
+                        return rc;
+        }
+
+        return 0;
+}
+
+static int getparam_cmdline(int argc, char **argv, struct param_opts *popt)
+{
+        int ch;
+
+        popt->po_show_path = 1;
+        popt->po_only_path = 0;
+        popt->po_show_type = 0;
+        popt->po_recursive = 0;
+
+        while ((ch = getopt(argc, argv, "nNF")) != -1) {
+                switch (ch) {
+                case 'N':
+                        popt->po_only_path = 1;
+                        break;
+                case 'n':
+                        popt->po_show_path = 0;
+                case 'F':
+                        popt->po_show_type = 1;
+                        break;
+                default:
+                        return -1;
+                }
+        }
+
+        return optind;
+}
+
+static int getparam_display(struct param_opts *popt, char *pattern)
+{
+        int rc;
+        int fd;
+        int i;
+        char *buf;
+        glob_t glob_info;
+        char filename[PATH_MAX + 1];    /* extra 1 byte for file type */
+
+        rc = glob(pattern, GLOB_BRACE, NULL, &glob_info);
+        if (rc) {
+                fprintf(stderr, "error: get_param: %s: %s\n",
+                        pattern, globerrstr(rc));
+                return -ESRCH;
+        }
+
+       buf = malloc(PAGE_CACHE_SIZE);
+       for (i = 0; i  < glob_info.gl_pathc; i++) {
+               char *valuename = NULL;
+
+               memset(buf, 0, PAGE_CACHE_SIZE);
+                /* As listparam_display is used to show param name (with type),
+                 * here "if (only_path)" is ignored.*/
+                if (popt->po_show_path) {
+                        strcpy(filename, glob_info.gl_pathv[i]);
+                        valuename = display_name(filename, 0);
+                }
+
+                /* Write the contents of file to stdout */
+                fd = open(glob_info.gl_pathv[i], O_RDONLY);
+                if (fd < 0) {
+                        fprintf(stderr,
+                                "error: get_param: opening('%s') failed: %s\n",
+                                glob_info.gl_pathv[i], strerror(errno));
+                        continue;
+                }
+
+               do {
+                       rc = read(fd, buf, PAGE_CACHE_SIZE);
+                       if (rc == 0)
+                               break;
+                        if (rc < 0) {
+                                fprintf(stderr, "error: get_param: "
+                                        "read('%s') failed: %s\n",
+                                        glob_info.gl_pathv[i], strerror(errno));
+                                break;
+                        }
+                        /* Print the output in the format path=value if the
+                         * value contains no new line character or cab be
+                         * occupied in a line, else print value on new line */
+                        if (valuename && popt->po_show_path) {
+                                int longbuf = strnchr(buf, rc - 1, '\n') != NULL
+                                              || rc > 60;
+                                printf("%s=%s", valuename, longbuf ? "\n" : buf);
+                                valuename = NULL;
+                                if (!longbuf)
+                                        continue;
+                                fflush(stdout);
+                        }
+                        rc = write(fileno(stdout), buf, rc);
+                        if (rc < 0) {
+                                fprintf(stderr, "error: get_param: "
+                                        "write to stdout failed: %s\n",
+                                        strerror(errno));
+                                break;
+                        }
+                } while (1);
+                close(fd);
+        }
+
+        globfree(&glob_info);
+        free(buf);
+        return rc;
+}
+
+int jt_lcfg_getparam(int argc, char **argv)
+{
+        int rc = 0, i;
+        struct param_opts popt;
+        char pattern[PATH_MAX];
+        char *path;
+
+        rc = getparam_cmdline(argc, argv, &popt);
+        if (rc < 0 || rc >= argc)
+                return CMD_HELP;
+
+       for (i = rc, rc = 0; i < argc; i++) {
+               int rc2;
+
+               path = argv[i];
+
+               clean_path(path);
+
+               lprocfs_param_pattern(argv[0], path, pattern, sizeof(pattern));
+
+               if (popt.po_only_path)
+                       rc2 = listparam_display(&popt, pattern);
+               else
+                       rc2 = getparam_display(&popt, pattern);
+               if (rc2 < 0 && rc == 0)
+                       rc = rc2;
+       }
+
+       return rc;
+}
+
+static int setparam_cmdline(int argc, char **argv, struct param_opts *popt)
+{
+        int ch;
+
+        popt->po_show_path = 1;
+        popt->po_only_path = 0;
+        popt->po_show_type = 0;
+        popt->po_recursive = 0;
+       popt->po_params2 = 0;
+       popt->po_delete = 0;
+
+       while ((ch = getopt(argc, argv, "nPd")) != -1) {
+                switch (ch) {
+                case 'n':
+                        popt->po_show_path = 0;
+                        break;
+               case 'P':
+                       popt->po_params2 = 1;
+                       break;
+               case 'd':
+                       popt->po_delete = 1;
+                       break;
+                default:
+                        return -1;
+                }
+        }
+        return optind;
+}
+
+static int setparam_display(struct param_opts *popt, char *pattern, char *value)
+{
+        int rc;
+        int fd;
+        int i;
+        glob_t glob_info;
+        char filename[PATH_MAX + 1];    /* extra 1 byte for file type */
+
+        rc = glob(pattern, GLOB_BRACE, NULL, &glob_info);
+        if (rc) {
+                fprintf(stderr, "error: set_param: %s: %s\n",
+                        pattern, globerrstr(rc));
+                return -ESRCH;
+        }
+       for (i = 0; i  < glob_info.gl_pathc; i++) {
+               char *valuename = NULL;
+
+               if (popt->po_show_path) {
+                       strcpy(filename, glob_info.gl_pathv[i]);
+                       valuename = display_name(filename, 0);
+                       if (valuename)
+                               printf("%s=%s\n", valuename, value);
+               }
+               /* Write the new value to the file */
+               fd = open(glob_info.gl_pathv[i], O_WRONLY);
+               if (fd >= 0) {
+                       rc = write(fd, value, strlen(value));
+                       if (rc < 0)
+                               fprintf(stderr, "error: set_param: setting "
+                                       "%s=%s: %s\n", glob_info.gl_pathv[i],
+                                       value, strerror(errno));
+                       else
+                               rc = 0;
+                       close(fd);
+               } else {
+                       fprintf(stderr, "error: set_param: %s opening %s\n",
+                               strerror(rc = errno), glob_info.gl_pathv[i]);
+               }
+       }
+
+       globfree(&glob_info);
+       return rc;
+}
+
+int jt_lcfg_setparam(int argc, char **argv)
+{
+        int rc = 0, i;
+        struct param_opts popt;
+        char pattern[PATH_MAX];
+        char *path = NULL, *value = NULL;
+
+        rc = setparam_cmdline(argc, argv, &popt);
+        if (rc < 0 || rc >= argc)
+                return CMD_HELP;
+
+       if (popt.po_params2)
+               /* We can't delete parameters that were
+                * set with old conf_param interface */
+               return jt_lcfg_mgsparam2(argc, argv, &popt);
+
+       for (i = rc, rc = 0; i < argc; i++) {
+               int rc2;
+
+                if ((value = strchr(argv[i], '=')) != NULL) {
+                        /* format: set_param a=b */
+                        *value = '\0';
+                        value ++;
+                        path = argv[i];
+                } else {
+                        /* format: set_param a b */
+                        if (path == NULL) {
+                                path = argv[i];
+                                continue;
+                        } else {
+                                value = argv[i];
+                        }
+                }
+
+                clean_path(path);
+
+                lprocfs_param_pattern(argv[0], path, pattern, sizeof(pattern));
+
+                rc2 = setparam_display(&popt, pattern, value);
+                path = NULL;
+                value = NULL;
+               if (rc2 < 0 && rc == 0)
+                       rc = rc2;
+       }
+
+       return rc;
+}