Older versions of multipath-tools used the 'getuid_callout'
configuration variable to generate the WWID. So for compatibility
we should be accepting existing configurations, but mark the
variable as 'deprecated'.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
libmultipath/Makefile | 2 +-
libmultipath/callout.c | 216 +++++++++++++++++++++++++++++++++++++++++++++
libmultipath/callout.h | 7 ++
libmultipath/config.c | 13 +++
libmultipath/config.h | 3 +
libmultipath/dict.c | 47 ++++++++++
libmultipath/discovery.c | 55 ++++++++----
libmultipath/propsel.c | 12 +++
libmultipath/structs.h | 1 +
libmultipath/structs_vec.c | 1 +
multipath.conf.annotated | 12 ++-
multipath/multipath.conf.5 | 5 ++
12 files changed, 354 insertions(+), 20 deletions(-)
create mode 100644 libmultipath/callout.c
create mode 100644 libmultipath/callout.h
diff --git a/libmultipath/Makefile b/libmultipath/Makefile
index 22d3844..ae1d8a3 100644
--- a/libmultipath/Makefile
+++ b/libmultipath/Makefile
@@ -9,7 +9,7 @@ DEVLIB = libmultipath.so
LIBS = $(DEVLIB).$(SONAME)
LIBDEPS = -lpthread -ldl -ldevmapper -ludev
-OBJS = memory.o parser.o vector.o devmapper.o \
+OBJS = memory.o parser.o vector.o devmapper.o callout.o \
hwtable.o blacklist.o util.o dmparser.o config.o \
structs.o discovery.o propsel.o dict.o \
pgpolicies.o debug.o regex.o defaults.o uevent.o \
diff --git a/libmultipath/callout.c b/libmultipath/callout.c
new file mode 100644
index 0000000..c35c7c0
--- /dev/null
+++ b/libmultipath/callout.c
@@ -0,0 +1,216 @@
+/*
+ * Source: copy of the udev package source file
+ *
+ * Copyrights of the source file apply
+ * Copyright (c) 2004 Christophe Varoqui
+ */
+#include <stdio.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <errno.h>
+
+#include "checkers.h"
+#include "vector.h"
+#include "structs.h"
+#include "util.h"
+#include "debug.h"
+
+int execute_program(char *path, char *value, int len)
+{
+ int retval;
+ int count;
+ int status;
+ int fds[2], null_fd;
+ pid_t pid;
+ char *pos;
+ char arg[CALLOUT_MAX_SIZE];
+ int argc = sizeof(arg) / 2;
+ char *argv[argc + 1];
+ int i;
+
+ i = 0;
+
+ if (strchr(path, ' ')) {
+ strlcpy(arg, path, sizeof(arg));
+ pos = arg;
+ while (pos != NULL && i < argc) {
+ if (pos[0] == '\'') {
+ /* don't separate if in apostrophes */
+ pos++;
+ argv[i] = strsep(&pos, "\'");
+ while (pos[0] == ' ')
+ pos++;
+ } else {
+ argv[i] = strsep(&pos, " ");
+ }
+ i++;
+ }
+ } else {
+ argv[i++] = path;
+ }
+ argv[i] = NULL;
+
+ retval = pipe(fds);
+
+ if (retval != 0) {
+ condlog(0, "error creating pipe for callout: %s", strerror(errno));
+ return -1;
+ }
+
+ pid = fork();
+
+ switch(pid) {
+ case 0:
+ /* child */
+ close(STDOUT_FILENO);
+
+ /* dup write side of pipe to STDOUT */
+ if (dup(fds[1]) < 0)
+ return -1;
+
+ /* Ignore writes to stderr */
+ null_fd = open("/dev/null", O_WRONLY);
+ if (null_fd > 0) {
+ close(STDERR_FILENO);
+ retval = dup(null_fd);
+ close(null_fd);
+ }
+
+ retval = execv(argv[0], argv);
+ condlog(0, "error execing %s : %s", argv[0], strerror(errno));
+ exit(-1);
+ case -1:
+ condlog(0, "fork failed: %s", strerror(errno));
+ close(fds[0]);
+ close(fds[1]);
+ return -1;
+ default:
+ /* parent reads from fds[0] */
+ close(fds[1]);
+ retval = 0;
+ i = 0;
+ while (1) {
+ count = read(fds[0], value + i, len - i-1);
+ if (count <= 0)
+ break;
+
+ i += count;
+ if (i >= len-1) {
+ condlog(0, "not enough space for response from %s", argv[0]);
+ retval = -1;
+ break;
+ }
+ }
+
+ if (count < 0) {
+ condlog(0, "no response from %s", argv[0]);
+ retval = -1;
+ }
+
+ if (i > 0 && value[i-1] == '\n')
+ i--;
+ value[i] = '\0';
+
+ wait(&status);
+ close(fds[0]);
+
+ retval = -1;
+ if (WIFEXITED(status)) {
+ status = WEXITSTATUS(status);
+ if (status == 0)
+ retval = 0;
+ else
+ condlog(0, "%s exitted with %d", argv[0], status);
+ }
+ else if (WIFSIGNALED(status))
+ condlog(0, "%s was terminated by signal %d", argv[0], WTERMSIG(status));
+ else
+ condlog(0, "%s terminated abnormally", argv[0]);
+ }
+ return retval;
+}
+
+extern int
+apply_format (char * string, char * cmd, struct path * pp)
+{
+ char * pos;
+ char * dst;
+ char * p;
+ char * q;
+ int len;
+ int myfree;
+
+ if (!string)
+ return 1;
+
+ if (!cmd)
+ return 1;
+
+ dst = cmd;
+ p = dst;
+ pos = strchr(string, '%');
+ myfree = CALLOUT_MAX_SIZE;
+
+ if (!pos) {
+ strcpy(dst, string);
+ return 0;
+ }
+
+ len = (int) (pos - string) + 1;
+ myfree -= len;
+
+ if (myfree < 2)
+ return 1;
+
+ snprintf(p, len, "%s", string);
+ p += len - 1;
+ pos++;
+
+ switch (*pos) {
+ case 'n':
+ len = strlen(pp->dev) + 1;
+ myfree -= len;
+
+ if (myfree < 2)
+ return 1;
+
+ snprintf(p, len, "%s", pp->dev);
+ for (q = p; q < p + len; q++) {
+ if (q && *q == '!')
+ *q = '/';
+ }
+ p += len - 1;
+ break;
+ case 'd':
+ len = strlen(pp->dev_t) + 1;
+ myfree -= len;
+
+ if (myfree < 2)
+ return 1;
+
+ snprintf(p, len, "%s", pp->dev_t);
+ p += len - 1;
+ break;
+ default:
+ break;
+ }
+ pos++;
+
+ if (!*pos)
+ return 0;
+
+ len = strlen(pos) + 1;
+ myfree -= len;
+
+ if (myfree < 2)
+ return 1;
+
+ snprintf(p, len, "%s", pos);
+ condlog(3, "reformated callout = %s", dst);
+ return 0;
+}
diff --git a/libmultipath/callout.h b/libmultipath/callout.h
new file mode 100644
index 0000000..ab648e8
--- /dev/null
+++ b/libmultipath/callout.h
@@ -0,0 +1,7 @@
+#ifndef _CALLOUT_H
+#define _CALLOUT_H
+
+int execute_program(char *, char *, int);
+int apply_format (char *, char *, struct path *);
+
+#endif /* _CALLOUT_H */
diff --git a/libmultipath/config.c b/libmultipath/config.c
index 138e6b4..cc44244 100644
--- a/libmultipath/config.c
+++ b/libmultipath/config.c
@@ -167,6 +167,9 @@ free_hwe (struct hwentry * hwe)
if (hwe->revision)
FREE(hwe->revision);
+ if (hwe->getuid)
+ FREE(hwe->getuid);
+
if (hwe->uid_attribute)
FREE(hwe->uid_attribute);
@@ -224,6 +227,9 @@ free_mpe (struct mpentry * mpe)
if (mpe->selector)
FREE(mpe->selector);
+ if (mpe->getuid)
+ FREE(mpe->getuid);
+
if (mpe->uid_attribute)
FREE(mpe->uid_attribute);
@@ -312,6 +318,7 @@ merge_hwe (struct hwentry * dst, struct hwentry * src)
merge_str(vendor);
merge_str(product);
merge_str(revision);
+ merge_str(getuid);
merge_str(uid_attribute);
merge_str(features);
merge_str(hwhandler);
@@ -369,6 +376,9 @@ store_hwe (vector hwtable, struct hwentry * dhwe)
if (dhwe->uid_attribute && !(hwe->uid_attribute = set_param_str(dhwe->uid_attribute)))
goto out;
+ if (dhwe->getuid && !(hwe->getuid = set_param_str(dhwe->getuid)))
+ goto out;
+
if (dhwe->features && !(hwe->features = set_param_str(dhwe->features)))
goto out;
@@ -473,6 +483,9 @@ free_config (struct config * conf)
if (conf->uid_attribute)
FREE(conf->uid_attribute);
+ if (conf->getuid)
+ FREE(conf->getuid);
+
if (conf->features)
FREE(conf->features);
diff --git a/libmultipath/config.h b/libmultipath/config.h
index f1578a8..ca65f88 100644
--- a/libmultipath/config.h
+++ b/libmultipath/config.h
@@ -27,6 +27,7 @@ struct hwentry {
char * product;
char * revision;
char * uid_attribute;
+ char * getuid;
char * features;
char * hwhandler;
char * selector;
@@ -54,6 +55,7 @@ struct mpentry {
char * wwid;
char * alias;
char * uid_attribute;
+ char * getuid;
char * selector;
char * features;
@@ -116,6 +118,7 @@ struct config {
char * multipath_dir;
char * selector;
char * uid_attribute;
+ char * getuid;
char * features;
char * hwhandler;
char * bindings_file;
diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 757d220..b747fcd 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -161,6 +161,17 @@ def_uid_attribute_handler(vector strvec)
}
static int
+def_getuid_callout_handler(vector strvec)
+{
+ conf->getuid = set_value(strvec);
+
+ if (!conf->getuid)
+ return 1;
+
+ return 0;
+}
+
+static int
def_prio_handler(vector strvec)
{
conf->prio_name = set_value(strvec);
@@ -973,6 +984,19 @@ hw_uid_attribute_handler(vector strvec)
}
static int
+hw_getuid_callout_handler(vector strvec)
+{
+ struct hwentry * hwe = VECTOR_LAST_SLOT(conf->hwtable);
+
+ hwe->getuid = set_value(strvec);
+
+ if (!hwe->getuid)
+ return 1;
+
+ return 0;
+}
+
+static int
hw_selector_handler(vector strvec)
{
struct hwentry * hwe = VECTOR_LAST_SLOT(conf->hwtable);
@@ -2118,6 +2142,17 @@ snprint_hw_uid_attribute (char * buff, int len, void * data)
}
static int
+snprint_hw_getuid_callout (char * buff, int len, void * data)
+{
+ struct hwentry * hwe = (struct hwentry *)data;
+
+ if (!hwe->getuid)
+ return 0;
+
+ return snprintf(buff, len, "\"%s\"", hwe->getuid);
+}
+
+static int
snprint_hw_prio (char * buff, int len, void * data)
{
struct hwentry * hwe = (struct hwentry *)data;
@@ -2443,6 +2478,15 @@ snprint_def_uid_attribute (char * buff, int len, void * data)
}
static int
+snprint_def_getuid_callout (char * buff, int len, void * data)
+{
+ if (!conf->getuid)
+ return 0;
+
+ return snprintf(buff, len, "\"%s\"", conf->getuid);
+}
+
+static int
snprint_def_prio (char * buff, int len, void * data)
{
if (!conf->prio_name)
@@ -2738,6 +2782,7 @@ init_keywords(void)
install_keyword("path_selector", &def_selector_handler, &snprint_def_selector);
install_keyword("path_grouping_policy", &def_pgpolicy_handler, &snprint_def_path_grouping_policy);
install_keyword("uid_attribute", &def_uid_attribute_handler, &snprint_def_uid_attribute);
+ install_keyword("getuid_callout", &def_getuid_callout_handler, &snprint_def_getuid_callout);
install_keyword("prio", &def_prio_handler, &snprint_def_prio);
install_keyword("prio_args", &def_prio_args_handler, &snprint_def_prio_args);
install_keyword("features", &def_features_handler, &snprint_def_features);
@@ -2769,6 +2814,7 @@ init_keywords(void)
__deprecated install_keyword("default_selector", &def_selector_handler, NULL);
__deprecated install_keyword("default_path_grouping_policy", &def_pgpolicy_handler, NULL);
__deprecated install_keyword("default_uid_attribute", &def_uid_attribute_handler, NULL);
+ __deprecated install_keyword("default_getuid_callout", &def_getuid_callout_handler, NULL);
__deprecated install_keyword("default_features", &def_features_handler, NULL);
__deprecated install_keyword("default_path_checker", &def_path_checker_handler, NULL);
@@ -2809,6 +2855,7 @@ init_keywords(void)
install_keyword("product_blacklist", &bl_product_handler, &snprint_hw_bl_product);
install_keyword("path_grouping_policy", &hw_pgpolicy_handler, &snprint_hw_path_grouping_policy);
install_keyword("uid_attribute", &hw_uid_attribute_handler, &snprint_hw_uid_attribute);
+ install_keyword("getuid_callout", &hw_getuid_callout_handler, &snprint_hw_getuid_callout);
install_keyword("path_selector", &hw_selector_handler, &snprint_hw_selector);
install_keyword("path_checker", &hw_path_checker_handler, &snprint_hw_path_checker);
install_keyword("checker", &hw_path_checker_handler, NULL);
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 6af5083..fcb8e4f 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -20,6 +20,7 @@
#include "structs.h"
#include "config.h"
#include "blacklist.h"
+#include "callout.h"
#include "debug.h"
#include "propsel.h"
#include "sg_include.h"
@@ -974,9 +975,9 @@ static int
get_uid (struct path * pp)
{
char *c;
- const char *value;
+ const char *origin;
- if (!pp->uid_attribute)
+ if (!pp->uid_attribute && !pp->getuid)
select_getuid(pp);
if (!pp->udev) {
@@ -985,23 +986,41 @@ get_uid (struct path * pp)
}
memset(pp->wwid, 0, WWID_SIZE);
- value = udev_device_get_property_value(pp->udev, pp->uid_attribute);
- if ((!value || strlen(value) == 0) && conf->dry_run == 2)
- value = getenv(pp->uid_attribute);
- if (value && strlen(value)) {
- size_t len = WWID_SIZE;
-
- if (strlen(value) + 1 > WWID_SIZE) {
- condlog(0, "%s: wwid overflow", pp->dev);
- } else {
- len = strlen(value);
+ if (pp->getuid) {
+ char buff[CALLOUT_MAX_SIZE];
+
+ /* Use 'getuid' callout, deprecated */
+ condlog(1, "%s: using deprecated getuid callout", pp->dev);
+ if (apply_format(pp->getuid, &buff[0], pp)) {
+ condlog(0, "error formatting uid callout command");
+ memset(pp->wwid, 0, WWID_SIZE);
+ } else if (execute_program(buff, pp->wwid, WWID_SIZE)) {
+ condlog(3, "error calling out %s", buff);
+ memset(pp->wwid, 0, WWID_SIZE);
}
- strncpy(pp->wwid, value, len);
+ origin = "callout";
} else {
- condlog(3, "%s: no %s attribute", pp->dev,
- pp->uid_attribute);
+ const char *value;
+
+ value = udev_device_get_property_value(pp->udev,
+ pp->uid_attribute);
+ if ((!value || strlen(value) == 0) && conf->dry_run == 2)
+ value = getenv(pp->uid_attribute);
+ if (value && strlen(value)) {
+ size_t len = WWID_SIZE;
+
+ if (strlen(value) + 1 > WWID_SIZE) {
+ condlog(0, "%s: wwid overflow", pp->dev);
+ } else {
+ len = strlen(value);
+ }
+ strncpy(pp->wwid, value, len);
+ } else {
+ condlog(3, "%s: no %s attribute", pp->dev,
+ pp->uid_attribute);
+ }
+ origin = "udev";
}
-
/* Strip any trailing blanks */
c = strchr(pp->wwid, '\0');
c--;
@@ -1009,8 +1028,8 @@ get_uid (struct path * pp)
*c = '\0';
c--;
}
- condlog(3, "%s: uid = %s (udev)", pp->dev,
- *pp->wwid == '\0' ? "<empty>" : pp->wwid);
+ condlog(3, "%s: uid = %s (%s)", pp->dev,
+ *pp->wwid == '\0' ? "<empty>" : pp->wwid, origin);
return 0;
}
diff --git a/libmultipath/propsel.c b/libmultipath/propsel.c
index 613dafc..65c2c7f 100644
--- a/libmultipath/propsel.c
+++ b/libmultipath/propsel.c
@@ -371,12 +371,24 @@ select_getuid (struct path * pp)
pp->dev, pp->uid_attribute);
return 0;
}
+ if (pp->hwe && pp->hwe->getuid) {
+ pp->getuid = pp->hwe->getuid;
+ condlog(3, "%s: getuid = %s (deprecated) (controller setting)",
+ pp->dev, pp->getuid);
+ return 0;
+ }
if (conf->uid_attribute) {
pp->uid_attribute = conf->uid_attribute;
condlog(3, "%s: uid_attribute = %s (config file default)",
pp->dev, pp->uid_attribute);
return 0;
}
+ if (conf->getuid) {
+ pp->getuid = conf->getuid;
+ condlog(3, "%s: getuid = %s (deprecated) (config file default)",
+ pp->dev, pp->getuid);
+ return 0;
+ }
pp->uid_attribute = STRDUP(DEFAULT_UID_ATTRIBUTE);
condlog(3, "%s: uid_attribute = %s (internal default)",
pp->dev, pp->uid_attribute);
diff --git a/libmultipath/structs.h b/libmultipath/structs.h
index ef3d76f..64de06e 100644
--- a/libmultipath/structs.h
+++ b/libmultipath/structs.h
@@ -173,6 +173,7 @@ struct path {
int pgindex;
int detect_prio;
char * uid_attribute;
+ char * getuid;
struct prio prio;
char * prio_args;
struct checker checker;
diff --git a/libmultipath/structs_vec.c b/libmultipath/structs_vec.c
index 186cd0e..993d3e0 100644
--- a/libmultipath/structs_vec.c
+++ b/libmultipath/structs_vec.c
@@ -82,6 +82,7 @@ orphan_path (struct path * pp)
pp->mpp = NULL;
pp->dmstate = PSTATE_UNDEF;
pp->uid_attribute = NULL;
+ pp->getuid = NULL;
prio_put(&pp->prio);
checker_put(&pp->checker);
if (pp->fd >= 0)
diff --git a/multipath.conf.annotated b/multipath.conf.annotated
index 09ed632..15ec468 100644
--- a/multipath.conf.annotated
+++ b/multipath.conf.annotated
@@ -59,10 +59,20 @@
# path_grouping_policy multibus
#
# #
+# # name : uid_attribute
+# # scope : multipath & multipathd
+# # desc : the default udev attribute from which the path
+# # identifier should be generated.
+# # default : ID_SERIAL
+# #
+# uid_attribute "ID_SERIAL"
+#
+# #
# # name : getuid_callout
# # scope : multipath & multipathd
# # desc : the default program and args to callout to obtain a unique
-# # path identifier. Absolute path required
+# # path identifier. This parameter is deprecated.
+# # This parameter is deprecated, superseded by uid_attribute
# # default : /lib/udev/scsi_id --whitelisted --device=/dev/%n
# #
# getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
index 70d15f3..ade9885 100644
--- a/multipath/multipath.conf.5
+++ b/multipath/multipath.conf.5
@@ -144,6 +144,11 @@ The udev attribute providing a unique path
identifier. Default value is
.I ID_SERIAL
.TP
+.B getuid_callout
+The default program and args to callout to obtain a unique path
+identifier. Should be specified with an absolute path.
+This parameter is deprecated; \fIuid_attribute\fR should be used instead.
+.TP
.B prio
The name of the path priority routine. The specified routine
should return a numeric value specifying the relative priority
--
1.7.12.4
--
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