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137 lines
4.0 KiB
137 lines
4.0 KiB
7 years ago
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---
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libmultipath/prioritizers/alua.c | 20 +++++++++++++++++++-
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libmultipath/propsel.c | 18 ++++++++++--------
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multipath/multipath.conf.5 | 19 ++++++++++++++++---
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3 files changed, 45 insertions(+), 12 deletions(-)
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Index: multipath-tools-130222/libmultipath/prioritizers/alua.c
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===================================================================
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--- multipath-tools-130222.orig/libmultipath/prioritizers/alua.c
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+++ multipath-tools-130222/libmultipath/prioritizers/alua.c
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@@ -86,15 +86,33 @@ get_alua_info(int fd, struct alua_contex
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return rc;
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}
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+int get_exclusive_perf_arg(char *args)
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+{
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+ char *ptr;
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+
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+ if (args == NULL)
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+ return 0;
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+ ptr = strstr(args, "exclusive_pref_bit");
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+ if (!ptr)
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+ return 0;
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+ if (ptr[18] != '\0' && ptr[18] != ' ' && ptr[18] != '\t')
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+ return 0;
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+ if (ptr != args && ptr[-1] != ' ' && ptr[-1] != '\t')
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+ return 0;
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+ return 1;
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+}
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+
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int getprio (struct path * pp, char * args)
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{
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int rc;
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int aas;
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int priopath;
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+ int exclusive_perf;
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if (pp->fd < 0)
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return -ALUA_PRIO_NO_INFORMATION;
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+ exclusive_perf = get_exclusive_perf_arg(args);
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rc = get_alua_info(pp->fd, pp->prio.context);
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if (rc >= 0) {
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aas = (rc & 0x0f);
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@@ -115,7 +133,7 @@ int getprio (struct path * pp, char * ar
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default:
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rc = 0;
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}
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- if (priopath && aas != AAS_OPTIMIZED)
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+ if (priopath && (aas != AAS_OPTIMIZED || exclusive_perf))
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rc += 80;
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} else {
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switch(-rc) {
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Index: multipath-tools-130222/libmultipath/propsel.c
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===================================================================
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--- multipath-tools-130222.orig/libmultipath/propsel.c
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+++ multipath-tools-130222/libmultipath/propsel.c
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@@ -420,17 +420,19 @@ select_prio (struct path * pp)
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if (prio_selected(p)) {
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condlog(3, "%s: prio = %s (detected setting)",
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pp->dev, prio_name(p));
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+ condlog(3, "%s: prio args = %s (detected setting)",
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+ pp->dev, prio_args(p));
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return 0;
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}
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}
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- if ((mpe = find_mpe(pp->wwid))) {
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- if (mpe->prio_name) {
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- prio_get(p, mpe->prio_name, mpe->prio_args);
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- condlog(3, "%s: prio = %s (LUN setting)",
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- pp->dev, prio_name(p));
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- return 0;
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- }
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+ if ((mpe = find_mpe(pp->wwid)) && mpe->prio_name) {
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+ prio_get(p, mpe->prio_name, mpe->prio_args);
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+ condlog(3, "%s: prio = %s (LUN setting)",
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+ pp->dev, prio_name(p));
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+ condlog(3, "%s: prio args = %s (LUN setting)",
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+ pp->dev, prio_args(p));
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+ return 0;
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}
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if (pp->hwe && pp->hwe->prio_name) {
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@@ -452,7 +454,7 @@ select_prio (struct path * pp)
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prio_get(p, DEFAULT_PRIO, DEFAULT_PRIO_ARGS);
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condlog(3, "%s: prio = %s (internal default)",
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pp->dev, DEFAULT_PRIO);
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- condlog(3, "%s: prio = %s (internal default)",
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+ condlog(3, "%s: prio args = %s (internal default)",
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pp->dev, DEFAULT_PRIO_ARGS);
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return 0;
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}
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Index: multipath-tools-130222/multipath/multipath.conf.5
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===================================================================
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--- multipath-tools-130222.orig/multipath/multipath.conf.5
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+++ multipath-tools-130222/multipath/multipath.conf.5
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@@ -182,7 +182,9 @@ Return a constant priority of \fI1\fR.
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Generate the path priority for EMC arrays.
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.TP
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.B alua
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-Generate the path priority based on the SCSI-3 ALUA settings.
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+Generate the path priority based on the SCSI-3 ALUA settings. This prioritizer
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+accepts the optional prio_arg
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+.I exclusive_pref_bit
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.TP
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.B ontap
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Generate the path priority for NetApp arrays.
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@@ -208,14 +210,25 @@ Default value is \fBconst\fR.
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.RE
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.TP
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.B prio_args
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-Arguments to pass to to the prio function. Currently only used with
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-.I weighted, which needs a value of the form
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+Arguments to pass to to the prio function. This only applies to certain
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+prioritizers
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+.RS
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+.TP 12
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+.B weighted
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+Needs a value of the form
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.I "<hbtl|devname> <regex1> <prio1> <regex2> <prio2> ..."
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.I hbtl
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regex can be of SCSI H:B:T:L format Ex: 1:0:.:. , *:0:0:.
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.I devname
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regex can be of device name format Ex: sda , sd.e
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.TP
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+.B alua
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+If
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+.I exclusive_pref_bit
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+is set, paths with the TPGS pref bit set will always be in their own path
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+group.
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+.RE
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+.TP
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.B features
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Specify any device-mapper features to be used. Syntax is
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.I num list
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