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LU-6210 utils: Use C99 initializer in jt_nodemap_modify()
[fs/lustre-release.git] / lustre / utils / obd.c
index 7482a1f..f029e92 100644 (file)
@@ -60,6 +60,7 @@
 #include <limits.h>
 
 #include "obdctl.h"
+#include "lustreapi_internal.h"
 #include <libcfs/util/list.h>
 #include <libcfs/util/ioctl.h>
 #include <libcfs/util/param.h>
 #include <libcfs/util/string.h>
 
 #include <lnet/nidstr.h>
-#include <lustre/lustre_idl.h>
-#include <lustre_cfg.h>
-#include <lustre_ioctl.h>
+#include <linux/lustre_ostid.h>
+#include <linux/lustre_cfg.h>
+#include <linux/lustre_ioctl.h>
 #include <lustre_ver.h>
 
 #include <lnet/lnetctl.h>
 #include <lustre/lustreapi.h>
-#include <lustre_param.h>
+#include <linux/lustre_param.h>
+#include <lustre/lustre_barrier_user.h>
 
 #define MAX_STRING_SIZE 128
 
@@ -1148,18 +1150,21 @@ int jt_obd_md_common(int argc, char **argv, int cmd)
         char                  *name = NULL;
         struct jt_fid_space    fid_space = {0};
         int                    version = 0;
-        struct option          long_opts[] = {
-                {"child_base_id",     required_argument, 0, 'b'},
-                {"stripe_count",      required_argument, 0, 'c'},
-                {"parent_basedir",    required_argument, 0, 'd'},
-                {"parent_dircount",   required_argument, 0, 'D'},
-                {"stripe_index",      required_argument, 0, 'i'},
-                {"mode",              required_argument, 0, 'm'},
-                {"count",             required_argument, 0, 'n'},
-                {"time",              required_argument, 0, 't'},
-                {"version",           no_argument,       0, 'v'},
-                {0, 0, 0, 0}
-        };
+       struct option long_opts[] = {
+       { .val = 'b',   .name = "child_base_id",
+                                               .has_arg = required_argument },
+       { .val = 'c',   .name = "stripe_count",
+                                               .has_arg = required_argument },
+       { .val = 'd',   .name = "parent_basedir",
+                                               .has_arg = required_argument },
+       { .val = 'D',   .name = "parent_dircount",
+                                               .has_arg = required_argument },
+       { .val = 'i',   .name = "stripe_index", .has_arg = required_argument },
+       { .val = 'm',   .name = "mode",         .has_arg = required_argument },
+       { .val = 'n',   .name = "count",        .has_arg = required_argument },
+       { .val = 't',   .name = "time",         .has_arg = required_argument },
+       { .val = 'v',   .name = "version",      .has_arg = no_argument },
+       { .name = NULL } };
 
         while ((c = getopt_long(argc, argv, "b:c:d:D:m:n:t:v",
                                 long_opts, NULL)) >= 0) {
@@ -1364,7 +1369,7 @@ int jt_obd_md_common(int argc, char **argv, int cmd)
                                 fprintf(stderr, "Allocate fids error %d.\n",rc);
                                 return rc;
                         }
-                       fid_to_ostid(&fid, &data.ioc_obdo1.o_oi);
+                       data.ioc_obdo1.o_oi.oi_fid = fid;
                 }
 
                 child_base_id += data.ioc_count;
@@ -1492,13 +1497,19 @@ int jt_obd_create(int argc, char **argv)
 
        ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
         for (i = 1, next_count = verbose; i <= count && shmem_running(); i++) {
+               /*
+                * base_id is 1 so we don't need to worry about it being
+                * greater than OBIF_MAX_OID
+                */
+               data.ioc_obdo1.o_oi.oi_fid.f_oid = base_id;
                data.ioc_obdo1.o_mode = mode;
-               ostid_set_id(&data.ioc_obdo1.o_oi, base_id);
                data.ioc_obdo1.o_uid = 0;
                data.ioc_obdo1.o_gid = 0;
+               data.ioc_obdo1.o_projid = 0;
                data.ioc_obdo1.o_valid = OBD_MD_FLTYPE | OBD_MD_FLMODE |
                                         OBD_MD_FLID | OBD_MD_FLUID |
-                                        OBD_MD_FLGID | OBD_MD_FLGROUP;
+                                        OBD_MD_FLGID | OBD_MD_FLGROUP |
+                                        OBD_MD_FLPROJID;
 
                 memset(buf, 0, sizeof(rawbuf));
                 rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
@@ -1533,30 +1544,42 @@ int jt_obd_create(int argc, char **argv)
 
 int jt_obd_setattr(int argc, char **argv)
 {
-        struct obd_ioctl_data data;
-        char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
-        char *end;
-        int rc;
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       __u64 objid;
+       char *end;
+       int mode;
+       int rc;
 
         memset(&data, 0, sizeof(data));
         data.ioc_dev = cur_device;
         if (argc != 2)
                 return CMD_HELP;
 
-       ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
-       ostid_set_id(&data.ioc_obdo1.o_oi, strtoull(argv[1], &end, 0));
-        if (*end) {
+       objid = strtoull(argv[1], &end, 0);
+       if (*end) {
+               fprintf(stderr, "error: %s: objid '%s' is not a number\n",
+                       jt_cmdname(argv[0]), argv[1]);
+               return CMD_HELP;
+       }
+
+       if (objid >= OBIF_MAX_OID) {
                 fprintf(stderr, "error: %s: invalid objid '%s'\n",
                         jt_cmdname(argv[0]), argv[1]);
                 return CMD_HELP;
         }
-        data.ioc_obdo1.o_mode = S_IFREG | strtoul(argv[2], &end, 0);
+
+       mode = strtoul(argv[2], &end, 0);
         if (*end) {
                 fprintf(stderr, "error: %s: invalid mode '%s'\n",
                         jt_cmdname(argv[0]), argv[2]);
                 return CMD_HELP;
         }
-        data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
+
+       ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
+       data.ioc_obdo1.o_mode = S_IFREG | mode;
+       data.ioc_obdo1.o_oi.oi_fid.f_oid = objid;
+       data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
 
         memset(buf, 0, sizeof(rawbuf));
         rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
@@ -1626,7 +1649,13 @@ int jt_obd_test_setattr(int argc, char **argv)
 
        ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
         for (i = 1, next_count = verbose; i <= count && shmem_running(); i++) {
-               ostid_set_id(&data.ioc_obdo1.o_oi, objid);
+               if (objid >= OBIF_MAX_OID) {
+                       fprintf(stderr, "errr: %s: invalid objid '%llu'\n",
+                               jt_cmdname(argv[0]), objid);
+                       return -E2BIG;
+               }
+
+               data.ioc_obdo1.o_oi.oi_fid.f_oid = objid;
                 data.ioc_obdo1.o_mode = S_IFREG;
                 data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
                 memset(buf, 0, sizeof(rawbuf));
@@ -1712,7 +1741,13 @@ int jt_obd_destroy(int argc, char **argv)
 
        ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
         for (i = 1, next_count = verbose; i <= count && shmem_running(); i++, id++) {
-               ostid_set_id(&data.ioc_obdo1.o_oi, id);
+               if (id >= OBIF_MAX_OID) {
+                       fprintf(stderr, "errr: %s: invalid objid '%llu'\n",
+                               jt_cmdname(argv[0]), id);
+                       return -E2BIG;
+               }
+
+               data.ioc_obdo1.o_oi.oi_fid.f_oid = id;
                data.ioc_obdo1.o_mode = S_IFREG | 0644;
                data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLMODE;
 
@@ -1745,21 +1780,30 @@ int jt_obd_getattr(int argc, char **argv)
 {
         struct obd_ioctl_data data;
         char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       __u64 objid;
         char *end;
         int rc;
 
         if (argc != 2)
                 return CMD_HELP;
 
-       memset(&data, 0, sizeof(data));
-       data.ioc_dev = cur_device;
-       ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
-       ostid_set_id(&data.ioc_obdo1.o_oi, strtoull(argv[1], &end, 0));
+       objid = strtoull(argv[1], &end, 0);
        if (*end) {
+               fprintf(stderr, "error: %s: objid '%s' is not a number\n",
+                       jt_cmdname(argv[0]), argv[1]);
+               return CMD_HELP;
+       }
+
+       if (objid >= OBIF_MAX_OID) {
                fprintf(stderr, "error: %s: invalid objid '%s'\n",
                        jt_cmdname(argv[0]), argv[1]);
                return CMD_HELP;
        }
+
+       memset(&data, 0, sizeof(data));
+       data.ioc_dev = cur_device;
+       ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
+       data.ioc_obdo1.o_oi.oi_fid.f_oid = objid;
        /* to help obd filter */
        data.ioc_obdo1.o_mode = 0100644;
        data.ioc_obdo1.o_valid = 0xffffffff;
@@ -1839,7 +1883,13 @@ int jt_obd_test_getattr(int argc, char **argv)
 
        ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
         for (i = 1, next_count = verbose; i <= count && shmem_running(); i++) {
-               ostid_set_id(&data.ioc_obdo1.o_oi, objid);
+               if (objid >= OBIF_MAX_OID) {
+                       fprintf(stderr, "errr: %s: invalid objid '%llu'\n",
+                               jt_cmdname(argv[0]), objid);
+                       return -E2BIG;
+               }
+
+               data.ioc_obdo1.o_oi.oi_fid.f_oid = objid;
                data.ioc_obdo1.o_mode = S_IFREG;
                data.ioc_obdo1.o_valid = 0xffffffff;
                memset(buf, 0, sizeof(rawbuf));
@@ -2046,7 +2096,13 @@ int jt_obd_test_brw(int argc, char **argv)
 #endif
 
        ostid_set_seq_echo(&data.ioc_obdo1.o_oi);
-       ostid_set_id(&data.ioc_obdo1.o_oi, objid);
+       if (objid >= OBIF_MAX_OID) {
+               fprintf(stderr, "errr: %s: invalid objid '%llu'\n",
+                       jt_cmdname(argv[0]), objid);
+               return -E2BIG;
+       }
+
+       data.ioc_obdo1.o_oi.oi_fid.f_oid = objid;
        data.ioc_obdo1.o_mode = S_IFREG;
        data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
                                 OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
@@ -2420,6 +2476,73 @@ int jt_obd_mdc_lookup(int argc, char **argv)
         return rc;
 }
 
+int jt_lcfg_fork(int argc, char **argv)
+{
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       int rc;
+
+       if (argc != 3)
+               return CMD_HELP;
+
+       memset(&data, 0, sizeof(data));
+       data.ioc_dev = get_mgs_device();
+       data.ioc_inllen1 = strlen(argv[1]) + 1;
+       data.ioc_inlbuf1 = argv[1];
+       data.ioc_inllen2 = strlen(argv[2]) + 1;
+       data.ioc_inlbuf2 = argv[2];
+
+       memset(buf, 0, sizeof(rawbuf));
+       rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
+       if (rc) {
+               fprintf(stderr, "error: %s: invalid ioctl\n",
+                       jt_cmdname(argv[0]));
+               return rc;
+       }
+
+       rc = l_ioctl(OBD_DEV_ID, OBD_IOC_LCFG_FORK, buf);
+       if (rc < 0)
+               fprintf(stderr, "error: %s: OBD_IOC_LCFG_FORK failed: %s\n",
+                       jt_cmdname(argv[0]), strerror(errno));
+
+       return rc;
+}
+
+int jt_lcfg_erase(int argc, char **argv)
+{
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       int rc;
+
+       if (argc == 3) {
+               if (strncmp(argv[2], "-q", strlen("-q")) != 0 &&
+                   strncmp(argv[2], "--quiet", strlen("--quiet")) != 0)
+                       return CMD_HELP;
+       } else if (argc != 2) {
+               return CMD_HELP;
+       }
+
+       memset(&data, 0, sizeof(data));
+       data.ioc_dev = get_mgs_device();
+       data.ioc_inllen1 = strlen(argv[1]) + 1;
+       data.ioc_inlbuf1 = argv[1];
+
+       memset(buf, 0, sizeof(rawbuf));
+       rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
+       if (rc) {
+               fprintf(stderr, "error: %s: invalid ioctl\n",
+                       jt_cmdname(argv[0]));
+               return rc;
+       }
+
+       rc = l_ioctl(OBD_DEV_ID, OBD_IOC_LCFG_ERASE, buf);
+       if (rc < 0)
+               fprintf(stderr, "error: %s: OBD_IOC_LCFG_ERASE failed: %s\n",
+                       jt_cmdname(argv[0]), strerror(errno));
+
+       return rc;
+}
+
 int jt_llog_catlist(int argc, char **argv)
 {
         struct obd_ioctl_data data;
@@ -2533,14 +2656,13 @@ static int llog_cancel_parse_optional(int argc, char **argv,
                                      struct obd_ioctl_data *data)
 {
        int cOpt;
-       const char *const short_options = "c:l:i:h";
-       const struct option long_options[] = {
-               {"catalog", required_argument, NULL, 'c'},
-               {"log_id", required_argument, NULL, 'l'},
-               {"log_idx", required_argument, NULL, 'i'},
-               {"help", no_argument, NULL, 'h'},
-               {NULL, 0, NULL, 0}
-       };
+       const char *const short_opts = "c:l:i:h";
+       const struct option long_opts[] = {
+       { .val = 'c',   .name = "catalog",      .has_arg = required_argument },
+       { .val = 'h',   .name = "help",         .has_arg = no_argument },
+       { .val = 'i',   .name = "log_idx",      .has_arg = required_argument },
+       { .val = 'l',   .name = "log_id",       .has_arg = required_argument },
+       { .name = NULL } };
 
        /* sanity check */
        if (!data || argc <= 1) {
@@ -2548,8 +2670,8 @@ static int llog_cancel_parse_optional(int argc, char **argv,
        }
 
        /*now process command line arguments*/
-       while ((cOpt = getopt_long(argc, argv, short_options,
-                                       long_options, NULL)) != -1) {
+       while ((cOpt = getopt_long(argc, argv, short_opts,
+                                       long_opts, NULL)) != -1) {
                switch (cOpt) {
                case 'c':
                        data->ioc_inllen1 = strlen(optarg) + 1;
@@ -2776,7 +2898,9 @@ static int check_pool_cmd(enum lcfg_command_type cmd,
 
         switch (cmd) {
         case LCFG_POOL_NEW: {
-                LASSERT(ostname == NULL);
+               if (ostname != NULL)
+                       return -EINVAL;
+
                 if (rc >= 0) {
                         fprintf(stderr, "Pool %s.%s already exists\n",
                                 fsname, poolname);
@@ -2785,7 +2909,9 @@ static int check_pool_cmd(enum lcfg_command_type cmd,
                 return 0;
         }
         case LCFG_POOL_DEL: {
-                LASSERT(ostname == NULL);
+               if (ostname != NULL)
+                       return -EINVAL;
+
                 if (rc == 1) {
                         fprintf(stderr, "Pool %s.%s not empty, "
                                 "please remove all members\n",
@@ -2993,9 +3119,11 @@ static int pool_cmd(enum lcfg_command_type cmd,
         if (ostname != NULL)
                 lustre_cfg_bufs_set_string(&bufs, 2, ostname);
 
-       lcfg = lustre_cfg_new(cmd, &bufs);
+
+       lcfg = malloc(lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
        if (lcfg == NULL)
                return -ENOMEM;
+       lustre_cfg_init(lcfg, cmd, &bufs);
 
         memset(&data, 0, sizeof(data));
         rc = data.ioc_dev = get_mgs_device();
@@ -3012,14 +3140,14 @@ static int pool_cmd(enum lcfg_command_type cmd,
         if (rc) {
                 fprintf(stderr, "error: %s: invalid ioctl\n",
                         jt_cmdname(cmdname));
-               lustre_cfg_free(lcfg);
+               free(lcfg);
                 return rc;
         }
         rc = l_ioctl(OBD_DEV_ID, OBD_IOC_POOL, buf);
 out:
         if (rc)
                 rc = -errno;
-        lustre_cfg_free(lcfg);
+       free(lcfg);
         return rc;
 }
 
@@ -3059,9 +3187,10 @@ static int nodemap_cmd(enum lcfg_command_type cmd, void *ret_data,
        }
        va_end(ap);
 
-       lcfg = lustre_cfg_new(cmd, &bufs);
+       lcfg = malloc(lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
        if (lcfg == NULL)
                return -ENOMEM;
+       lustre_cfg_init(lcfg, cmd, &bufs);
 
        memset(&data, 0, sizeof(data));
        rc = data.ioc_dev = get_mgs_device();
@@ -3099,7 +3228,7 @@ static int nodemap_cmd(enum lcfg_command_type cmd, void *ret_data,
                memcpy(ret_data, data.ioc_pbuf1, ret_size);
        }
 out:
-       lustre_cfg_free(lcfg);
+       free(lcfg);
 
        return rc;
 }
@@ -3309,28 +3438,15 @@ int jt_nodemap_add_range(int argc, char **argv)
        int                     rc = 0;
        int                     c;
 
-       static struct option long_options[] = {
-               {
-                       .name           = "name",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'n',
-               },
-               {
-                       .name           = "range",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'r',
-               },
-               {
-                       NULL
-               }
-       };
+       static struct option long_opts[] = {
+       { .val = 'n',   .name = "name",         .has_arg = required_argument },
+       { .val = 'r',   .name = "range",        .has_arg = required_argument },
+       { .name = NULL } };
 
        INIT_LIST_HEAD(&nidlist);
 
        while ((c = getopt_long(argc, argv, "n:r:",
-                               long_options, NULL)) != -1) {
+                               long_opts, NULL)) != -1) {
                switch (c) {
                case 'n':
                        nodemap_name = optarg;
@@ -3483,26 +3599,13 @@ int jt_nodemap_set_fileset(int argc, char **argv)
        int   rc = 0;
        int   c;
 
-       static struct option long_options[] = {
-               {
-                       .name           = "name",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'n',
-               },
-               {
-                       .name           = "fileset",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'f',
-               },
-               {
-                       NULL
-               }
-       };
+       static struct option long_opts[] = {
+       { .val = 'f',   .name = "fileset",      .has_arg = required_argument },
+       { .val = 'n',   .name = "name",         .has_arg = required_argument },
+       { .name = NULL } };
 
        while ((c = getopt_long(argc, argv, "n:f:",
-                               long_options, NULL)) != -1) {
+                               long_opts, NULL)) != -1) {
                switch (c) {
                case 'n':
                        nodemap_name = optarg;
@@ -3553,32 +3656,14 @@ int jt_nodemap_modify(int argc, char **argv)
        char                    *param = NULL;
        char                    *value = NULL;
 
-       static struct option long_options[] = {
-               {
-                       .name           = "name",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'n',
-               },
-               {
-                       .name           = "property",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'p',
-               },
-               {
-                       .name           = "value",
-                       .has_arg        = required_argument,
-                       .flag           = 0,
-                       .val            = 'v',
-               },
-               {
-                       NULL
-               }
-       };
+       static struct option long_opts[] = {
+       { .val = 'n',   .name = "name",         .has_arg = required_argument },
+       { .val = 'p',   .name = "property",     .has_arg = required_argument },
+       { .val = 'v',   .name = "value",        .has_arg = required_argument },
+       { .name = NULL } };
 
        while ((c = getopt_long(argc, argv, "n:p:v:",
-                               long_options, NULL)) != -1) {
+                               long_opts, NULL)) != -1) {
                switch (c) {
                case 'n':
                        nodemap_name = optarg;
@@ -3595,7 +3680,7 @@ int jt_nodemap_modify(int argc, char **argv)
        if (nodemap_name == NULL || param == NULL || value == NULL) {
                fprintf(stderr, "usage: nodemap_modify --name <nodemap_name> "
                                "--property <property_name> --value <value>\n");
-               fprintf(stderr, "valid properties: admin trusted "
+               fprintf(stderr, "valid properties: admin trusted map_mode "
                                "squash_uid squash_gid deny_unknown\n");
                return -1;
        }
@@ -3610,6 +3695,8 @@ int jt_nodemap_modify(int argc, char **argv)
                cmd = LCFG_NODEMAP_SQUASH_UID;
        } else if (strcmp("squash_gid", param) == 0) {
                cmd = LCFG_NODEMAP_SQUASH_GID;
+       } else if (strcmp("map_mode", param) == 0) {
+               cmd = LCFG_NODEMAP_MAP_MODE;
        } else {
                fprintf(stderr, "error: %s: nodemap_modify invalid "
                                "subcommand: %s\n",
@@ -3885,35 +3972,10 @@ static int extract_fsname_poolname(const char *arg, char *fsname,
        *ptr = '\0';
        ++ptr;
 
-       rc = lustre_is_fsname_valid(fsname, 1, LUSTRE_MAXFSNAME);
-       if (rc < 0) {
-               fprintf(stderr, "filesystem name %s must be 1-%d chars\n",
-                       fsname, LUSTRE_MAXFSNAME);
-               rc = -EINVAL;
-               goto err;
-       } else if (rc > 0) {
-               fprintf(stderr, "char '%c' not allowed in filesystem name\n",
-                       rc);
-               rc = -EINVAL;
-               goto err;
-       }
-
-       rc = lustre_is_poolname_valid(ptr, 1, LOV_MAXPOOLNAME);
-       if (rc == -1) {
+       if (strlen(ptr) == 0) {
                fprintf(stderr, "poolname is empty\n");
                rc = -EINVAL;
                goto err;
-       } else if (rc == -2) {
-               fprintf(stderr,
-                       "poolname %s is too long (max is %d)\n",
-                       ptr, LOV_MAXPOOLNAME);
-               rc = -ENAMETOOLONG;
-               goto err;
-       } else if (rc > 0) {
-               fprintf(stderr, "char '%c' not allowed in pool name '%s'\n",
-                       rc, ptr);
-               rc = -EINVAL;
-               goto err;
        }
 
        strncpy(poolname, ptr, LOV_MAXPOOLNAME);
@@ -4060,6 +4122,236 @@ out:
         return rc;
 }
 
+static const char *barrier_status2name(enum barrier_status status)
+{
+       switch (status) {
+       case BS_INIT:
+               return "init";
+       case BS_FREEZING_P1:
+               return "freezing_p1";
+       case BS_FREEZING_P2:
+               return "freezing_p2";
+       case BS_FROZEN:
+               return "frozen";
+       case BS_THAWING:
+               return "thawing";
+       case BS_THAWED:
+               return "thawed";
+       case BS_FAILED:
+               return "failed";
+       case BS_EXPIRED:
+               return "expired";
+       case BS_RESCAN:
+               return "rescan";
+       default:
+               return "unknown";
+       }
+}
+
+int jt_barrier_freeze(int argc, char **argv)
+{
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       struct barrier_ctl bc;
+       int rc;
+
+       if (argc < 2 || argc > 3)
+               return CMD_HELP;
+
+       memset(&data, 0, sizeof(data));
+       rc = data.ioc_dev = get_mgs_device();
+       if (rc < 0)
+               return rc;
+
+       memset(&bc, 0, sizeof(bc));
+       bc.bc_version = BARRIER_VERSION_V1;
+       bc.bc_cmd = BC_FREEZE;
+       if (argc == 3)
+               bc.bc_timeout = atoi(argv[2]);
+       if (bc.bc_timeout == 0)
+               bc.bc_timeout = BARRIER_TIMEOUT_DEFAULT;
+
+       if (strlen(argv[1]) > 8) {
+               fprintf(stderr, "%s: fsname name %s is too long. "
+                       "It should not exceed 8.\n", argv[0], argv[1]);
+               return -EINVAL;
+       }
+
+       strncpy(bc.bc_name, argv[1], sizeof(bc.bc_name));
+       data.ioc_inlbuf1 = (char *)&bc;
+       data.ioc_inllen1 = sizeof(bc);
+       memset(buf, 0, sizeof(rawbuf));
+       rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
+       if (rc) {
+               fprintf(stderr, "Fail to pack ioctl data: rc = %d.\n", rc);
+               return rc;
+       }
+
+       rc = l_ioctl(OBD_DEV_ID, OBD_IOC_BARRIER, buf);
+       if (rc < 0)
+               fprintf(stderr, "Fail to freeze barrier for %s: %s\n",
+                       argv[1], strerror(errno));
+
+       return rc;
+}
+
+int jt_barrier_thaw(int argc, char **argv)
+{
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       struct barrier_ctl bc;
+       int rc;
+
+       if (argc != 2)
+               return CMD_HELP;
+
+       memset(&data, 0, sizeof(data));
+       rc = data.ioc_dev = get_mgs_device();
+       if (rc < 0)
+               return rc;
+
+       memset(&bc, 0, sizeof(bc));
+       bc.bc_version = BARRIER_VERSION_V1;
+       bc.bc_cmd = BC_THAW;
+
+       if (strlen(argv[1]) > 8) {
+               fprintf(stderr, "fsname name %s is too long. "
+                       "It should not exceed 8.\n", argv[1]);
+               return -EINVAL;
+       }
+
+       strncpy(bc.bc_name, argv[1], sizeof(bc.bc_name));
+       data.ioc_inlbuf1 = (char *)&bc;
+       data.ioc_inllen1 = sizeof(bc);
+       memset(buf, 0, sizeof(rawbuf));
+       rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
+       if (rc) {
+               fprintf(stderr, "Fail to pack ioctl data: rc = %d.\n", rc);
+               return rc;
+       }
+
+       rc = l_ioctl(OBD_DEV_ID, OBD_IOC_BARRIER, buf);
+       if (rc < 0)
+               fprintf(stderr, "Fail to thaw barrier for %s: %s\n",
+                       argv[1], strerror(errno));
+
+       return rc;
+}
+
+int __jt_barrier_stat(int argc, char **argv, struct barrier_ctl *bc)
+{
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       int rc;
+
+       memset(&data, 0, sizeof(data));
+       rc = data.ioc_dev = get_mgs_device();
+       if (rc < 0)
+               return rc;
+
+       memset(bc, 0, sizeof(*bc));
+       bc->bc_version = BARRIER_VERSION_V1;
+       bc->bc_cmd = BC_STAT;
+       strncpy(bc->bc_name, argv[1], sizeof(bc->bc_name));
+       data.ioc_inlbuf1 = (char *)bc;
+       data.ioc_inllen1 = sizeof(*bc);
+       memset(buf, 0, sizeof(rawbuf));
+       rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
+       if (rc) {
+               fprintf(stderr, "Fail to pack ioctl data: rc = %d.\n", rc);
+               return rc;
+       }
+
+       rc = l_ioctl(OBD_DEV_ID, OBD_IOC_BARRIER, buf);
+       if (rc < 0)
+               fprintf(stderr, "Fail to query barrier for %s: %s\n",
+                       argv[1], strerror(errno));
+       else
+               obd_ioctl_unpack(&data, buf, sizeof(rawbuf));
+
+       return rc;
+}
+
+int jt_barrier_stat(int argc, char **argv)
+{
+       struct barrier_ctl bc;
+       int rc;
+
+       if (argc != 2)
+               return CMD_HELP;
+
+       if (strlen(argv[1]) > 8) {
+               fprintf(stderr, "fsname name %s is too long. "
+                       "It should not exceed 8.\n", argv[1]);
+               return -EINVAL;
+       }
+
+       rc = __jt_barrier_stat(argc, argv, &bc);
+       if (!rc) {
+               printf("The barrier for %s is in '%s'\n",
+                      argv[1], barrier_status2name(bc.bc_status));
+               if (bc.bc_status == BS_FREEZING_P1 ||
+                   bc.bc_status == BS_FREEZING_P2 ||
+                   bc.bc_status == BS_FROZEN)
+                       printf("The barrier will be expired after %d "
+                              "seconds\n", bc.bc_timeout);
+       }
+
+       return rc;
+}
+
+int jt_barrier_rescan(int argc, char **argv)
+{
+       struct obd_ioctl_data data;
+       char rawbuf[MAX_IOC_BUFLEN], *buf = rawbuf;
+       struct barrier_ctl bc;
+       int rc;
+
+       if (argc < 2 || argc > 3)
+               return CMD_HELP;
+
+       memset(&data, 0, sizeof(data));
+       rc = data.ioc_dev = get_mgs_device();
+       if (rc < 0)
+               return rc;
+
+       memset(&bc, 0, sizeof(bc));
+       bc.bc_version = BARRIER_VERSION_V1;
+       bc.bc_cmd = BC_RESCAN;
+       if (argc == 3)
+               bc.bc_timeout = atoi(argv[2]);
+       if (bc.bc_timeout == 0)
+               bc.bc_timeout = BARRIER_TIMEOUT_DEFAULT;
+
+       if (strlen(argv[1]) > 8) {
+               fprintf(stderr, "fsname name %s is too long. "
+                       "It should not exceed 8.\n", argv[1]);
+               return -EINVAL;
+       }
+
+       strncpy(bc.bc_name, argv[1], sizeof(bc.bc_name));
+       data.ioc_inlbuf1 = (char *)&bc;
+       data.ioc_inllen1 = sizeof(bc);
+       memset(buf, 0, sizeof(rawbuf));
+       rc = obd_ioctl_pack(&data, &buf, sizeof(rawbuf));
+       if (rc) {
+               fprintf(stderr, "Fail to pack ioctl data: rc = %d.\n", rc);
+               return rc;
+       }
+
+       rc = l_ioctl(OBD_DEV_ID, OBD_IOC_BARRIER, buf);
+       if (rc < 0) {
+               fprintf(stderr, "Fail to rescan barrier bitmap for %s: %s\n",
+                       argv[1], strerror(errno));
+       } else {
+               obd_ioctl_unpack(&data, buf, sizeof(rawbuf));
+               printf("%u of %u MDT(s) in the filesystem %s are inactive\n",
+                      bc.bc_absence, bc.bc_total, argv[1]);
+       }
+
+       return rc;
+}
+
 int jt_get_obj_version(int argc, char **argv)
 {
        struct lu_fid fid;