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From a66fe0ea2e09b8d82a2d8940632ac06ee8bcc579 Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Thu, 5 Nov 2015 15:20:58 +0100
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Subject: [PATCH 2/2] rbd: fix ceph settings precedence
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Message-id: <1446736858-29005-3-git-send-email-stefanha@redhat.com>
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Patchwork-id: 68294
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O-Subject: [RHEL-7.2.z qemu-kvm PATCH 2/2] rbd: fix ceph settings precedence
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Bugzilla: 1279389
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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From: Josh Durgin <jdurgin@redhat.com>
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Apply the ceph settings from a config file before any ceph settings
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from the command line. Since the ceph config file location may be
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specified on the command line, parse it once to read the config file,
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and do a second pass to apply the rest of the command line ceph
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options.
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Signed-off-by: Josh Durgin <jdurgin@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit e34d8f297d51b7ffa5dce72df1e45fa94cff989c)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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Conflicts:
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block/rbd.c - downstream does not use Error*
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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---
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block/rbd.c | 34 +++++++++++++++++++++++++---------
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1 file changed, 25 insertions(+), 9 deletions(-)
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diff --git a/block/rbd.c b/block/rbd.c
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index 11a39ac..b982658 100644
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--- a/block/rbd.c
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+++ b/block/rbd.c
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@@ -235,7 +235,8 @@ static char *qemu_rbd_parse_clientname(const char *conf, char *clientname)
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return NULL;
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}
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-static int qemu_rbd_set_conf(rados_t cluster, const char *conf)
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+static int qemu_rbd_set_conf(rados_t cluster, const char *conf,
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+ bool only_read_conf_file)
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{
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char *p, *buf;
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char name[RBD_MAX_CONF_NAME_SIZE];
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@@ -267,14 +268,18 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf)
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qemu_rbd_unescape(value);
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if (strcmp(name, "conf") == 0) {
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- ret = rados_conf_read_file(cluster, value);
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- if (ret < 0) {
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- error_report("error reading conf file %s", value);
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- break;
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+ /* read the conf file alone, so it doesn't override more
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+ specific settings for a particular device */
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+ if (only_read_conf_file) {
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+ ret = rados_conf_read_file(cluster, value);
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+ if (ret < 0) {
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+ error_report("error reading conf file %s", value);
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+ break;
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+ }
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}
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} else if (strcmp(name, "id") == 0) {
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/* ignore, this is parsed by qemu_rbd_parse_clientname() */
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- } else {
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+ } else if (!only_read_conf_file) {
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ret = rados_conf_set(cluster, name, value);
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if (ret < 0) {
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error_report("invalid conf option %s", name);
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@@ -341,12 +346,17 @@ static int qemu_rbd_create(const char *filename, QEMUOptionParameter *options,
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if (strstr(conf, "conf=") == NULL) {
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/* try default location, but ignore failure */
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rados_conf_read_file(cluster, NULL);
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+ } else if (conf[0] != '\0' &&
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+ qemu_rbd_set_conf(cluster, conf, true) < 0) {
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+ rados_shutdown(cluster);
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+ error_report("error setting config options");
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+ return -EIO;
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}
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if (conf[0] != '\0' &&
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- qemu_rbd_set_conf(cluster, conf) < 0) {
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- error_report("error setting config options");
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+ qemu_rbd_set_conf(cluster, conf, false) < 0) {
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rados_shutdown(cluster);
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+ error_report("error setting config options");
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return -EIO;
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}
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@@ -504,10 +514,16 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
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if (strstr(conf, "conf=") == NULL) {
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/* try default location, but ignore failure */
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rados_conf_read_file(s->cluster, NULL);
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+ } else if (conf[0] != '\0') {
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+ r = qemu_rbd_set_conf(s->cluster, conf, true);
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+ if (r < 0) {
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+ error_report("error setting config options");
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+ goto failed_shutdown;
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+ }
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}
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if (conf[0] != '\0') {
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- r = qemu_rbd_set_conf(s->cluster, conf);
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+ r = qemu_rbd_set_conf(s->cluster, conf, false);
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if (r < 0) {
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error_report("error setting config options");
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goto failed_shutdown;
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--
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1.8.3.1
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