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block/nfs: add support for setting debug level 

recent libnfs versions support logging debug messages. Add
support for it in qemu through an URL parameter.

Example:
 qemu -cdrom nfs://127.0.0.1/iso/my.iso?debug=2

Signed-off-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 1447052973-14513-1-git-send-email-pl@kamp.de
Signed-off-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Peter Lieven 2015-11-09 08:09:33 +01:00 committed by Jeff Cody
parent 071608b519
commit 7725b8bf12
1 changed files with 12 additions and 0 deletions
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12
block/nfs.c
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@ -36,6 +36,7 @@
#include <nfsc/libnfs.h>
#define QEMU_NFS_MAX_READAHEAD_SIZE 1048576
#define QEMU_NFS_MAX_DEBUG_LEVEL 2
typedef struct NFSClient {
struct nfs_context *context;
@ -333,6 +334,17 @@ static int64_t nfs_client_open(NFSClient *client, const char *filename,
val = QEMU_NFS_MAX_READAHEAD_SIZE;
}
nfs_set_readahead(client->context, val);
#endif
#ifdef LIBNFS_FEATURE_DEBUG
} else if (!strcmp(qp->p[i].name, "debug")) {
/* limit the maximum debug level to avoid potential flooding
* of our log files. */
if (val > QEMU_NFS_MAX_DEBUG_LEVEL) {
error_report("NFS Warning: Limiting NFS debug level"
" to %d", QEMU_NFS_MAX_DEBUG_LEVEL);
val = QEMU_NFS_MAX_DEBUG_LEVEL;
}
nfs_set_debug(client->context, val);
#endif
} else {
error_setg(errp, "Unknown NFS parameter name: %s",