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[Qemu-devel] [PATCH 07/12] rbd: allow configuration of rados from the rb
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 07/12] rbd: allow configuration of rados from the rbd filename |
Date: |
Wed, 8 Jun 2011 15:48:25 +0200 |
From: Josh Durgin <address@hidden>
The new format is rbd:pool/address@hidden:option1=value1[:option2=value2...]]
Each option is used to configure rados, and may be any Ceph option, or "conf".
The "conf" option specifies a Ceph configuration file to read.
This allows rbd volumes from more than one Ceph cluster to be used by
specifying different monitor addresses, as well as having different
logging levels or locations for different volumes.
Reviewed-by: Christian Brunner <address@hidden>
Signed-off-by: Josh Durgin <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block/rbd.c | 119 ++++++++++++++++++++++++++++++++++++++++++++++++++--------
1 files changed, 102 insertions(+), 17 deletions(-)
diff --git a/block/rbd.c b/block/rbd.c
index 2cee70d..edf1086 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -23,13 +23,17 @@
/*
* When specifying the image filename use:
*
- * rbd:poolname/devicename
+ * rbd:poolname/address@hidden:option1=value1[:option2=value2...]]
*
* poolname must be the name of an existing rados pool
*
* devicename is the basename for all objects used to
* emulate the raw device.
*
+ * Each option given is used to configure rados, and may be
+ * any Ceph option, or "conf". The "conf" option specifies
+ * a Ceph configuration file to read.
+ *
* Metadata information (image size, ...) is stored in an
* object with the name "devicename.rbd".
*
@@ -123,7 +127,8 @@ static int qemu_rbd_next_tok(char *dst, int dst_len,
static int qemu_rbd_parsename(const char *filename,
char *pool, int pool_len,
char *snap, int snap_len,
- char *name, int name_len)
+ char *name, int name_len,
+ char *conf, int conf_len)
{
const char *start;
char *p, *buf;
@@ -135,28 +140,84 @@ static int qemu_rbd_parsename(const char *filename,
buf = qemu_strdup(start);
p = buf;
+ *snap = '\0';
+ *conf = '\0';
ret = qemu_rbd_next_tok(pool, pool_len, p, '/', "pool name", &p);
if (ret < 0 || !p) {
ret = -EINVAL;
goto done;
}
- ret = qemu_rbd_next_tok(name, name_len, p, '@', "object name", &p);
- if (ret < 0) {
- goto done;
+
+ if (strchr(p, '@')) {
+ ret = qemu_rbd_next_tok(name, name_len, p, '@', "object name", &p);
+ if (ret < 0) {
+ goto done;
+ }
+ ret = qemu_rbd_next_tok(snap, snap_len, p, ':', "snap name", &p);
+ } else {
+ ret = qemu_rbd_next_tok(name, name_len, p, ':', "object name", &p);
}
- if (!p) {
- *snap = '\0';
+ if (ret < 0 || !p) {
goto done;
}
- ret = qemu_rbd_next_tok(snap, snap_len, p, '\0', "snap name", &p);
+ ret = qemu_rbd_next_tok(conf, conf_len, p, '\0', "configuration", &p);
done:
qemu_free(buf);
return ret;
}
+static int qemu_rbd_set_conf(rados_t cluster, const char *conf)
+{
+ char *p, *buf;
+ char name[RBD_MAX_CONF_NAME_SIZE];
+ char value[RBD_MAX_CONF_VAL_SIZE];
+ int ret = 0;
+
+ buf = qemu_strdup(conf);
+ p = buf;
+
+ while (p) {
+ ret = qemu_rbd_next_tok(name, sizeof(name), p,
+ '=', "conf option name", &p);
+ if (ret < 0) {
+ break;
+ }
+
+ if (!p) {
+ error_report("conf option %s has no value", name);
+ ret = -EINVAL;
+ break;
+ }
+
+ ret = qemu_rbd_next_tok(value, sizeof(value), p,
+ ':', "conf option value", &p);
+ if (ret < 0) {
+ break;
+ }
+
+ if (strcmp(name, "conf")) {
+ ret = rados_conf_set(cluster, name, value);
+ if (ret < 0) {
+ error_report("invalid conf option %s", name);
+ ret = -EINVAL;
+ break;
+ }
+ } else {
+ ret = rados_conf_read_file(cluster, value);
+ if (ret < 0) {
+ error_report("error reading conf file %s", value);
+ break;
+ }
+ }
+ }
+
+ qemu_free(buf);
+ return ret;
+}
+
static int qemu_rbd_create(const char *filename, QEMUOptionParameter *options)
{
int64_t bytes = 0;
@@ -165,6 +226,7 @@ static int qemu_rbd_create(const char *filename,
QEMUOptionParameter *options)
char pool[RBD_MAX_POOL_NAME_SIZE];
char name[RBD_MAX_IMAGE_NAME_SIZE];
char snap_buf[RBD_MAX_SNAP_NAME_SIZE];
+ char conf[RBD_MAX_CONF_SIZE];
char *snap = NULL;
rados_t cluster;
rados_ioctx_t io_ctx;
@@ -172,7 +234,8 @@ static int qemu_rbd_create(const char *filename,
QEMUOptionParameter *options)
if (qemu_rbd_parsename(filename, pool, sizeof(pool),
snap_buf, sizeof(snap_buf),
- name, sizeof(name)) < 0) {
+ name, sizeof(name),
+ conf, sizeof(conf)) < 0) {
return -EINVAL;
}
if (snap_buf[0] != '\0') {
@@ -205,8 +268,17 @@ static int qemu_rbd_create(const char *filename,
QEMUOptionParameter *options)
return -EIO;
}
- if (rados_conf_read_file(cluster, NULL) < 0) {
- error_report("error reading config file");
+ if (strstr(conf, "conf=") == NULL) {
+ if (rados_conf_read_file(cluster, NULL) < 0) {
+ error_report("error reading config file");
+ rados_shutdown(cluster);
+ return -EIO;
+ }
+ }
+
+ if (conf[0] != '\0' &&
+ qemu_rbd_set_conf(cluster, conf) < 0) {
+ error_report("error setting config options");
rados_shutdown(cluster);
return -EIO;
}
@@ -316,11 +388,13 @@ static int qemu_rbd_open(BlockDriverState *bs, const char
*filename, int flags)
BDRVRBDState *s = bs->opaque;
char pool[RBD_MAX_POOL_NAME_SIZE];
char snap_buf[RBD_MAX_SNAP_NAME_SIZE];
+ char conf[RBD_MAX_CONF_SIZE];
int r;
if (qemu_rbd_parsename(filename, pool, sizeof(pool),
snap_buf, sizeof(snap_buf),
- s->name, sizeof(s->name)) < 0) {
+ s->name, sizeof(s->name),
+ conf, sizeof(conf)) < 0) {
return -EINVAL;
}
s->snap = NULL;
@@ -334,11 +408,22 @@ static int qemu_rbd_open(BlockDriverState *bs, const char
*filename, int flags)
return r;
}
- r = rados_conf_read_file(s->cluster, NULL);
- if (r < 0) {
- error_report("error reading config file");
- rados_shutdown(s->cluster);
- return r;
+ if (strstr(conf, "conf=") == NULL) {
+ r = rados_conf_read_file(s->cluster, NULL);
+ if (r < 0) {
+ error_report("error reading config file");
+ rados_shutdown(s->cluster);
+ return r;
+ }
+ }
+
+ if (conf[0] != '\0') {
+ r = qemu_rbd_set_conf(s->cluster, conf);
+ if (r < 0) {
+ error_report("error setting config options");
+ rados_shutdown(s->cluster);
+ return r;
+ }
}
r = rados_connect(s->cluster);
--
1.7.5.2
- [Qemu-devel] [PULL 00/12] Block patches, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 03/12] vmdk: fix endianness bugs, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 04/12] block/raw-posix: use a character device if a block device is given, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 08/12] rbd: check return values when scheduling aio, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 02/12] block: clarify the meaning of BDRV_O_NOCACHE, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 06/12] rbd: use the higher level librbd instead of just librados, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 11/12] bdrv_img_create: Fix segfault, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 07/12] rbd: allow configuration of rados from the rbd filename,
Kevin Wolf <=
- [Qemu-devel] [PATCH 01/12] ide/core: Remove explicit setting of BM_STATUS_INT, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 10/12] qcow2: Fix memory leaks in error cases, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 05/12] block/raw-posix: get right partition size, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 09/12] rbd: Add bdrv_truncate implementation, Kevin Wolf, 2011/06/08
- [Qemu-devel] [PATCH 12/12] qemu-img create: Fix displayed default cluster size, Kevin Wolf, 2011/06/08
- Re: [Qemu-devel] [PULL 00/12] Block patches, Anthony Liguori, 2011/06/09