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[Qemu-devel] [PATCH v4] block/gluster: add support to choose libgfapi lo
From: |
Prasanna Kumar Kalever |
Subject: |
[Qemu-devel] [PATCH v4] block/gluster: add support to choose libgfapi logfile |
Date: |
Fri, 22 Jul 2016 20:26:48 +0530 |
currently all the libgfapi logs defaults to '/dev/stderr' as it was hardcoded
in a call to glfs logging api. When the debug level is chosen to DEBUG/TRACE,
gfapi logs will be huge and fill/overflow the console view.
This patch provides a commandline option to mention log file path which helps
in logging to the specified file and also help in persisting the gfapi logs.
Usage:
-----
*URI Style:
---------
-drive file=gluster://hostname/volname/image.qcow2,file.debug=9,\
file.logfile=/var/log/qemu/qemu-gfapi.log
*JSON Style:
----------
'json:{
"driver":"qcow2",
"file":{
"driver":"gluster",
"volume":"volname",
"path":"image.qcow2",
"debug":"9",
"logfile":"/var/log/qemu/qemu-gfapi.log",
"server":[
{
"type":"tcp",
"host":"1.2.3.4",
"port":24007
},
{
"type":"unix",
"socket":"/var/run/glusterd.socket"
}
]
}
}'
Signed-off-by: Prasanna Kumar Kalever <address@hidden>
---
v4: address review comments from Eric Blake on v3.
v3: rebased on master, which is now QMP compatible.
v2: address comments from Jeff Cody, thanks Jeff!
v1: initial patch
---
block/gluster.c | 42 ++++++++++++++++++++++++++++++++++++++----
qapi/block-core.json | 5 ++++-
2 files changed, 42 insertions(+), 5 deletions(-)
diff --git a/block/gluster.c b/block/gluster.c
index 01b479f..e7bd13c 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -30,6 +30,8 @@
#define GLUSTER_DEFAULT_PORT 24007
#define GLUSTER_DEBUG_DEFAULT 4
#define GLUSTER_DEBUG_MAX 9
+#define GLUSTER_OPT_LOGFILE "logfile"
+#define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr
*/
#define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n"
@@ -44,6 +46,7 @@ typedef struct GlusterAIOCB {
typedef struct BDRVGlusterState {
struct glfs *glfs;
struct glfs_fd *fd;
+ char *logfile;
bool supports_seek_data;
int debug_level;
} BDRVGlusterState;
@@ -73,6 +76,11 @@ static QemuOptsList qemu_gluster_create_opts = {
.type = QEMU_OPT_NUMBER,
.help = "Gluster log level, valid range is 0-9",
},
+ {
+ .name = GLUSTER_OPT_LOGFILE,
+ .type = QEMU_OPT_STRING,
+ .help = "Logfile path of libgfapi",
+ },
{ /* end of list */ }
}
};
@@ -91,6 +99,11 @@ static QemuOptsList runtime_opts = {
.type = QEMU_OPT_NUMBER,
.help = "Gluster log level, valid range is 0-9",
},
+ {
+ .name = GLUSTER_OPT_LOGFILE,
+ .type = QEMU_OPT_STRING,
+ .help = "Logfile path of libgfapi",
+ },
{ /* end of list */ }
},
};
@@ -341,7 +354,7 @@ static struct glfs
*qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf,
}
}
- ret = glfs_set_logging(glfs, "-", gconf->debug_level);
+ ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug_level);
if (ret < 0) {
goto out;
}
@@ -576,7 +589,9 @@ static struct glfs
*qemu_gluster_init(BlockdevOptionsGluster *gconf,
if (ret < 0) {
error_setg(errp, "invalid URI");
error_append_hint(errp, "Usage: file=gluster[+transport]://"
-
"[host[:port]]/volume/path[?socket=...]\n");
+ "[host[:port]]volume/path[?socket=...]"
+ "[,file.debug=N]"
+ "[,file.logfile=/path/filename.log]\n");
errno = -ret;
return NULL;
}
@@ -586,7 +601,9 @@ static struct glfs
*qemu_gluster_init(BlockdevOptionsGluster *gconf,
error_append_hint(errp, "Usage: "
"-drive driver=qcow2,file.driver=gluster,"
"file.volume=testvol,file.path=/path/a.qcow2"
- "[,file.debug=9],file.server.0.type=tcp,"
+ "[,file.debug=9]"
+ "[,file.logfile=/path/filename.log],"
+ "file.server.0.type=tcp,"
"file.server.0.host=1.2.3.4,"
"file.server.0.port=24007,"
"file.server.1.transport=unix,"
@@ -677,7 +694,7 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict
*options,
BlockdevOptionsGluster *gconf = NULL;
QemuOpts *opts;
Error *local_err = NULL;
- const char *filename;
+ const char *filename, *logfile;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
@@ -700,6 +717,13 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict
*options,
gconf = g_new0(BlockdevOptionsGluster, 1);
gconf->debug_level = s->debug_level;
gconf->has_debug_level = true;
+
+ logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE);
+ s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT);
+
+ gconf->logfile = g_strdup(s->logfile);
+ gconf->has_logfile = true;
+
s->glfs = qemu_gluster_init(gconf, filename, options, errp);
if (!s->glfs) {
ret = -errno;
@@ -738,6 +762,7 @@ out:
if (!ret) {
return ret;
}
+ g_free(s->logfile);
if (s->fd) {
glfs_close(s->fd);
}
@@ -769,6 +794,8 @@ static int qemu_gluster_reopen_prepare(BDRVReopenState
*state,
gconf = g_new0(BlockdevOptionsGluster, 1);
gconf->debug_level = s->debug_level;
gconf->has_debug_level = true;
+ gconf->logfile = g_strdup(s->logfile);
+ gconf->has_logfile = true;
reop_s->glfs = qemu_gluster_init(gconf, state->bs->filename, NULL, errp);
if (reop_s->glfs == NULL) {
ret = -errno;
@@ -914,6 +941,12 @@ static int qemu_gluster_create(const char *filename,
}
gconf->has_debug_level = true;
+ gconf->logfile = qemu_opt_get_del(opts, GLUSTER_OPT_LOGFILE);
+ if (!gconf->logfile) {
+ gconf->logfile = g_strdup(GLUSTER_LOGFILE_DEFAULT);
+ }
+ gconf->has_logfile = true;
+
glfs = qemu_gluster_init(gconf, filename, NULL, errp);
if (!glfs) {
ret = -errno;
@@ -1025,6 +1058,7 @@ static void qemu_gluster_close(BlockDriverState *bs)
{
BDRVGlusterState *s = bs->opaque;
+ g_free(s->logfile);
if (s->fd) {
glfs_close(s->fd);
s->fd = NULL;
diff --git a/qapi/block-core.json b/qapi/block-core.json
index f462345..bed531d 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2138,13 +2138,16 @@
#
# @debug-level: #optional libgfapi log level (default '4' which is Error)
#
+# @logfile: #optional libgfapi log file (default /dev/stderr)
+#
# Since: 2.7
##
{ 'struct': 'BlockdevOptionsGluster',
'data': { 'volume': 'str',
'path': 'str',
'server': ['GlusterServer'],
- '*debug_level': 'int' } }
+ '*debug_level': 'int',
+ '*logfile': 'str' } }
##
# @BlockdevOptions
--
2.7.4
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