From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Fabian Ebner Date: Tue, 17 Nov 2020 10:51:05 +0100 Subject: [PATCH] PVE: fall back to open-iscsi initiatorname When no explicit option is given, try reading the initiator name from /etc/iscsi/initiatorname.iscsi and only use the generic fallback, i.e. iqn.2008-11.org.linux-kvmXXX, as a third alternative. This avoids the need to add an explicit option for vma and to explicitly set it for each call to qemu that deals with iSCSI disks, while still allowing to set the option if a different name is needed. According to RFC 3720, an initiator name is at most 223 bytes long, so the 4 KiB buffer is big enough, even if many whitespaces are used. Signed-off-by: Fabian Ebner Signed-off-by: Thomas Lamprecht --- block/iscsi.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/block/iscsi.c b/block/iscsi.c index 2ff14b7472..46f275fbf7 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -1392,12 +1392,42 @@ static char *get_initiator_name(QemuOpts *opts) const char *name; char *iscsi_name; UuidInfo *uuid_info; + FILE *name_fh; name = qemu_opt_get(opts, "initiator-name"); if (name) { return g_strdup(name); } + name_fh = fopen("/etc/iscsi/initiatorname.iscsi", "r"); + if (name_fh) { + const char *key = "InitiatorName"; + char buffer[4096]; + char *line; + + while ((line = fgets(buffer, sizeof(buffer), name_fh))) { + line = g_strstrip(line); + if (!strncmp(line, key, strlen(key))) { + line = strchr(line, '='); + if (!line || strlen(line) == 1) { + continue; + } + line++; + g_strstrip(line); + if (!strlen(line)) { + continue; + } + name = line; + break; + } + } + fclose(name_fh); + + if (name) { + return g_strdup(name); + } + } + uuid_info = qmp_query_uuid(NULL); if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { name = qemu_get_vm_name();