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SUSE:SLE-12-SP2:GA
mdadm.1739
0003-Set-home-cluster-while-creating-an-array.p...
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File 0003-Set-home-cluster-while-creating-an-array.patch of Package mdadm.1739
From 2d4c0988133480cd015a031292e42d3ff04a3c61 Mon Sep 17 00:00:00 2001 From: Guoqing Jiang <gqjiang@suse.com> Date: Wed, 10 Jun 2015 13:42:06 +0800 Subject: [PATCH 03/11] Set home-cluster while creating an array The home-cluster is stored in the bitmap super block of the array. The device can be assembled on a cluster with the cluster name same as the one recorded in the bitmap. If home-cluster is not specified, this is auto-detected using dlopen corosync cmap library. neilb: allow code to compile when corosync-devel is not installed. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: NeilBrown <neilb@suse.de> --- Create.c | 1 + Makefile | 6 +++++- ReadMe.c | 1 + config.c | 27 ++++++++++++++++++++++++++- mdadm.8.in | 6 ++++++ mdadm.c | 17 +++++++++++++++++ mdadm.h | 5 +++++ super1.c | 5 ++++- util.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 9 files changed, 122 insertions(+), 3 deletions(-) diff --git a/Create.c b/Create.c index c967120..01afb97 100644 --- a/Create.c +++ b/Create.c @@ -539,6 +539,7 @@ int Create(struct supertype *st, char *mddev, warn = 1; } st->nodes = c->nodes; + st->cluster_name = c->homecluster; if (warn) { if (c->runstop!= 1) { diff --git a/Makefile b/Makefile index 1a4a5dc..e3b6529 100644 --- a/Makefile +++ b/Makefile @@ -79,10 +79,13 @@ MDMON_DIR = $(RUN_DIR) # place for autoreplace cookies FAILED_SLOTS_DIR = $(RUN_DIR)/failed-slots SYSTEMD_DIR=/lib/systemd/system + +COROSYNC:=$(shell [ -d /usr/include/corosync ] || echo -DNO_COROSYNC) + DIRFLAGS = -DMAP_DIR=\"$(MAP_DIR)\" -DMAP_FILE=\"$(MAP_FILE)\" DIRFLAGS += -DMDMON_DIR=\"$(MDMON_DIR)\" DIRFLAGS += -DFAILED_SLOTS_DIR=\"$(FAILED_SLOTS_DIR)\" -CFLAGS = $(CWFLAGS) $(CXFLAGS) -DSendmail=\""$(MAILCMD)"\" $(CONFFILEFLAGS) $(DIRFLAGS) +CFLAGS = $(CWFLAGS) $(CXFLAGS) -DSendmail=\""$(MAILCMD)"\" $(CONFFILEFLAGS) $(DIRFLAGS) $(COROSYNC) VERSION = $(shell [ -d .git ] && git describe HEAD | sed 's/mdadm-//') VERS_DATE = $(shell [ -d .git ] && date --date="`git log -n1 --format=format:%cd --date=short`" '+%0dth %B %Y' | sed -e 's/1th/1st/' -e 's/2th/2nd/' -e 's/11st/11th/' -e 's/12nd/12th/') @@ -101,6 +104,7 @@ endif # If you want a static binary, you might uncomment these # LDFLAGS = -static # STRIP = -s +LDLIBS=-ldl INSTALL = /usr/bin/install DESTDIR = diff --git a/ReadMe.c b/ReadMe.c index dd7a1ad..80f2be8 100644 --- a/ReadMe.c +++ b/ReadMe.c @@ -143,6 +143,7 @@ struct option long_options[] = { {"symlinks", 1, 0, Symlinks}, {"data-offset",1, 0, DataOffset}, {"nodes",1, 0, Nodes}, + {"home-cluster",1, 0, ClusterName}, /* For assemble */ {"uuid", 1, 0, 'u'}, diff --git a/config.c b/config.c index a35807c..b6b17bc 100644 --- a/config.c +++ b/config.c @@ -77,7 +77,7 @@ char DefaultAltConfFile[] = CONFFILE2; char DefaultAltConfDir[] = CONFFILE2 ".d"; enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev, - Homehost, AutoMode, Policy, PartPolicy, LTEnd }; + Homehost, HomeCluster, AutoMode, Policy, PartPolicy, LTEnd }; char *keywords[] = { [Devices] = "devices", [Array] = "array", @@ -86,6 +86,7 @@ char *keywords[] = { [Program] = "program", [CreateDev]= "create", [Homehost] = "homehost", + [HomeCluster] = "homecluster", [AutoMode] = "auto", [Policy] = "policy", [PartPolicy]="part-policy", @@ -559,6 +560,21 @@ void homehostline(char *line) } } +static char *home_cluster = NULL; +void homeclusterline(char *line) +{ + char *w; + + for (w=dl_next(line); w != line ; w=dl_next(w)) { + if (home_cluster == NULL) { + if (strcasecmp(w, "<none>")==0) + home_cluster = xstrdup(""); + else + home_cluster = xstrdup(w); + } + } +} + char auto_yes[] = "yes"; char auto_no[] = "no"; char auto_homehost[] = "homehost"; @@ -721,6 +737,9 @@ void conf_file(FILE *f) case Homehost: homehostline(line); break; + case HomeCluster: + homeclusterline(line); + break; case AutoMode: autoline(line); break; @@ -881,6 +900,12 @@ char *conf_get_homehost(int *require_homehostp) return home_host; } +char *conf_get_homecluster(void) +{ + load_conffile(); + return home_cluster; +} + struct createinfo *conf_get_create_info(void) { load_conffile(); diff --git a/mdadm.8.in b/mdadm.8.in index d8bcf05..db0d06f 100644 --- a/mdadm.8.in +++ b/mdadm.8.in @@ -415,6 +415,12 @@ This functionality is currently only provided by and .BR \-\-monitor . +.TP +.B \-\-home\-cluster= +specifies the cluster name for the md device. The md device can be assembled +only on the cluster which matches the name specified. If this option is not +provided, mdadm tries to detect the cluster name automatically. + .SH For create, build, or grow: .TP diff --git a/mdadm.c b/mdadm.c index 40d56cb..3235ff4 100644 --- a/mdadm.c +++ b/mdadm.c @@ -615,6 +615,13 @@ int main(int argc, char *argv[]) exit(2); } continue; + case O(CREATE, ClusterName): + c.homecluster = optarg; + if (strlen(c.homecluster) > 64) { + pr_err("Cluster name too big.\n"); + exit(ERANGE); + } + continue; case O(CREATE,'x'): /* number of spare (eXtra) disks */ if (s.sparedisks) { pr_err("spare-devices set twice: %d and %s\n", @@ -1309,6 +1316,16 @@ int main(int argc, char *argv[]) c.require_homehost = 0; } + if (c.homecluster == NULL && (c.nodes > 0)) { + c.homecluster = conf_get_homecluster(); + if (c.homecluster == NULL) + rv = get_cluster_name(&c.homecluster); + if (rv != 0) { + pr_err("The md can't get cluster name\n"); + exit(1); + } + } + if (c.backup_file && data_offset != INVALID_SECTORS) { pr_err("--backup-file and --data-offset are incompatible\n"); exit(2); diff --git a/mdadm.h b/mdadm.h index 434ce4d..80a1073 100644 --- a/mdadm.h +++ b/mdadm.h @@ -346,6 +346,7 @@ enum special_options { Restore, Action, Nodes, + ClusterName, }; enum prefix_standard { @@ -421,6 +422,7 @@ struct context { int invalid_backup; char *action; int nodes; + char *homecluster; }; struct shape { @@ -1033,6 +1035,7 @@ struct supertype { int devcnt; int retry_soon; int nodes; + char *cluster_name; struct mdinfo *devs; @@ -1308,6 +1311,7 @@ extern char *conf_get_mailaddr(void); extern char *conf_get_mailfrom(void); extern char *conf_get_program(void); extern char *conf_get_homehost(int *require_homehostp); +extern char *conf_get_homecluster(void); extern char *conf_line(FILE *file); extern char *conf_word(FILE *file, int allow_key); extern void print_quoted(char *str); @@ -1416,6 +1420,7 @@ extern char *stat2devnm(struct stat *st); extern char *fd2devnm(int fd); extern int in_initrd(void); +extern int get_cluster_name(char **name); #define _ROUND_UP(val, base) (((val) + (base) - 1) & ~(base - 1)) #define ROUND_UP(val, base) _ROUND_UP(val, (typeof(val))(base)) diff --git a/super1.c b/super1.c index 43ee1a0..fa1b356 100644 --- a/super1.c +++ b/super1.c @@ -2071,7 +2071,7 @@ add_internal_bitmap1(struct supertype *st, bbl_size = -bbl_offset; if (!may_change || (room < 3*2 && - __le32_to_cpu(sb->max_dev) <= 384)) { + __le32_to_cpu(sb->max_dev) <= 384)) { room = 3*2; offset = 1*2; bbl_size = 0; @@ -2158,6 +2158,9 @@ add_internal_bitmap1(struct supertype *st, bms->sync_size = __cpu_to_le64(size); bms->write_behind = __cpu_to_le32(write_behind); bms->nodes = __cpu_to_le32(st->nodes); + if (st->cluster_name) + strncpy((char *)bms->cluster_name, + st->cluster_name, strlen(st->cluster_name)); *chunkp = chunk; return 1; diff --git a/util.c b/util.c index 7937eb6..f7d902f 100644 --- a/util.c +++ b/util.c @@ -34,6 +34,15 @@ #include <ctype.h> #include <dirent.h> #include <signal.h> +#include <dlfcn.h> +#include <stdint.h> +#ifdef NO_COROSYNC + typedef uint64_t cmap_handle_t; + #define CS_OK 1 +#else + #include <corosync/cmap.h> +#endif + /* * following taken from linux/blkpg.h because they aren't @@ -1968,3 +1977,51 @@ void reopen_mddev(int mdfd) if (fd >= 0 && fd != mdfd) dup2(fd, mdfd); } + +int get_cluster_name(char **cluster_name) +{ + void *lib_handle = NULL; + int rv = -1; + + cmap_handle_t handle; + static int (*initialize)(cmap_handle_t *handle); + static int (*get_string)(cmap_handle_t handle, + const char *string, + char **name); + static int (*finalize)(cmap_handle_t handle); + + + lib_handle = dlopen("libcmap.so.4", RTLD_NOW | RTLD_LOCAL); + if (!lib_handle) + return rv; + + initialize = dlsym(lib_handle, "cmap_initialize"); + if (!initialize) + goto out; + + get_string = dlsym(lib_handle, "cmap_get_string"); + if (!get_string) + goto out; + + finalize = dlsym(lib_handle, "cmap_finalize"); + if (!finalize) + goto out; + + rv = initialize(&handle); + if (rv != CS_OK) + goto out; + + rv = get_string(handle, "totem.cluster_name", cluster_name); + if (rv != CS_OK) { + free(*cluster_name); + rv = -1; + goto name_err; + } + + rv = 0; +name_err: + finalize(handle); +out: + dlclose(lib_handle); + return rv; +} -- 1.7.12.4
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