[dm-devel] [PATCH 08/26] libmultipath: Do not access 'conf->cmd' in domap()
Hannes Reinecke
hare at suse.de
Mon Jun 20 08:08:55 UTC 2016
'conf->cmd' is only ever set if we're called from multipath, so
we can combine the 'is_daemon' argument and the 'conf->cmd' check
in domap() and avoid accessing 'conf->cmd' in domap().
Signed-off-by: Hannes Reinecke <hare at suse.com>
---
libmultipath/config.h | 1 +
libmultipath/configure.c | 7 +++++--
libmultipath/configure.h | 3 ++-
multipath/main.c | 5 +++--
multipathd/main.c | 4 ++--
5 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/libmultipath/config.h b/libmultipath/config.h
index 51afd22..715b887 100644
--- a/libmultipath/config.h
+++ b/libmultipath/config.h
@@ -24,6 +24,7 @@ enum devtypes {
};
enum mpath_cmds {
+ CMD_NONE,
CMD_CREATE,
CMD_DRY_RUN,
CMD_LIST_SHORT,
diff --git a/libmultipath/configure.c b/libmultipath/configure.c
index d15d898..44b2d2b 100644
--- a/libmultipath/configure.c
+++ b/libmultipath/configure.c
@@ -586,7 +586,7 @@ domap (struct multipath * mpp, char * params, int is_daemon)
/*
* last chance to quit before touching the devmaps
*/
- if (conf->cmd == CMD_DRY_RUN && mpp->action != ACT_NOTHING) {
+ if (mpp->action == ACT_DRY_RUN) {
print_multipath_topology(mpp, conf->verbosity);
return DOMAP_DRY;
}
@@ -731,10 +731,11 @@ out:
}
extern int
-coalesce_paths (struct vectors * vecs, vector newmp, char * refwwid, int force_reload, int is_daemon)
+coalesce_paths (struct vectors * vecs, vector newmp, char * refwwid, int force_reload, enum mpath_cmds cmd)
{
int r = 1;
int k, i;
+ int is_daemon = (cmd == CMD_NONE) ? 1 : 0;
char params[PARAMS_SIZE];
struct multipath * mpp;
struct path * pp1;
@@ -827,6 +828,8 @@ coalesce_paths (struct vectors * vecs, vector newmp, char * refwwid, int force_r
continue;
}
+ if (cmd == CMD_DRY_RUN)
+ mpp->action = ACT_DRY_RUN;
if (mpp->action == ACT_UNDEF)
select_action(mpp, curmp, force_reload);
diff --git a/libmultipath/configure.h b/libmultipath/configure.h
index c0338bf..8d474ea 100644
--- a/libmultipath/configure.h
+++ b/libmultipath/configure.h
@@ -19,6 +19,7 @@ enum actions {
ACT_CREATE,
ACT_RESIZE,
ACT_FORCERENAME,
+ ACT_DRY_RUN,
};
#define FLUSH_ONE 1
@@ -27,7 +28,7 @@ enum actions {
int setup_map (struct multipath * mpp, char * params, int params_size );
int domap (struct multipath * mpp, char * params, int is_daemon);
int reinstate_paths (struct multipath *mpp);
-int coalesce_paths (struct vectors *vecs, vector curmp, char * refwwid, int force_reload, int is_daemon);
+int coalesce_paths (struct vectors *vecs, vector curmp, char * refwwid, int force_reload, enum mpath_cmds cmd);
int get_refwwid (char * dev, enum devtypes dev_type, vector pathvec, char **wwid);
int reload_map(struct vectors *vecs, struct multipath *mpp, int refresh, int is_daemon);
int sysfs_get_host_adapter_name(struct path *pp, char *adapter_name);
diff --git a/multipath/main.c b/multipath/main.c
index 7c35ce1..e16c6cc 100644
--- a/multipath/main.c
+++ b/multipath/main.c
@@ -381,7 +381,7 @@ configure (void)
* core logic entry point
*/
r = coalesce_paths(&vecs, NULL, refwwid,
- conf->force_reload, 0);
+ conf->force_reload, conf->cmd);
out:
if (refwwid)
@@ -484,7 +484,8 @@ main (int argc, char *argv[])
logsink = 0;
if (load_config(DEFAULT_CONFIGFILE, udev))
exit(1);
-
+ /* Default to CMD_CREATE */
+ conf->cmd = CMD_CREATE;
while ((arg = getopt(argc, argv, ":adchl::FfM:v:p:b:BritquwW")) != EOF ) {
switch(arg) {
case 1: printf("optarg : %s\n",optarg);
diff --git a/multipathd/main.c b/multipathd/main.c
index 9568ae9..036872c 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -487,7 +487,7 @@ ev_add_map (char * dev, char * alias, struct vectors * vecs)
r = get_refwwid(dev, DEV_DEVMAP, vecs->pathvec, &refwwid);
if (refwwid) {
- r = coalesce_paths(vecs, NULL, refwwid, 0, 1);
+ r = coalesce_paths(vecs, NULL, refwwid, 0, CMD_NONE);
dm_lib_release();
}
@@ -1798,7 +1798,7 @@ configure (struct vectors * vecs, int start_waiters)
/*
* create new set of maps & push changed ones into dm
*/
- if (coalesce_paths(vecs, mpvec, NULL, 1, 1))
+ if (coalesce_paths(vecs, mpvec, NULL, 1, CMD_NONE))
return 1;
/*
--
2.6.6
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