69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Fabian Ebner <f.ebner@proxmox.com>
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Date: Tue, 17 Nov 2020 10:51:05 +0100
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Subject: [PATCH] PVE: fall back to open-iscsi initiatorname
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When no explicit option is given, try reading the initiator name from
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/etc/iscsi/initiatorname.iscsi and only use the generic fallback, i.e.
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iqn.2008-11.org.linux-kvmXXX, as a third alternative.
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This avoids the need to add an explicit option for vma and to explicitly set it
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for each call to qemu that deals with iSCSI disks, while still allowing to set
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the option if a different name is needed.
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According to RFC 3720, an initiator name is at most 223 bytes long, so the
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4 KiB buffer is big enough, even if many whitespaces are used.
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Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
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---
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block/iscsi.c | 30 ++++++++++++++++++++++++++++++
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1 file changed, 30 insertions(+)
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diff --git a/block/iscsi.c b/block/iscsi.c
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index e30a7e3606..6c70bbe351 100644
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--- a/block/iscsi.c
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+++ b/block/iscsi.c
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@@ -1374,12 +1374,42 @@ static char *get_initiator_name(QemuOpts *opts)
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const char *name;
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char *iscsi_name;
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UuidInfo *uuid_info;
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+ FILE *name_fh;
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name = qemu_opt_get(opts, "initiator-name");
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if (name) {
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return g_strdup(name);
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}
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+ name_fh = fopen("/etc/iscsi/initiatorname.iscsi", "r");
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+ if (name_fh) {
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+ const char *key = "InitiatorName";
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+ char buffer[4096];
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+ char *line;
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+
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+ while ((line = fgets(buffer, sizeof(buffer), name_fh))) {
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+ line = g_strstrip(line);
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+ if (!strncmp(line, key, strlen(key))) {
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+ line = strchr(line, '=');
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+ if (!line || strlen(line) == 1) {
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+ continue;
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+ }
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+ line++;
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+ g_strstrip(line);
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+ if (!strlen(line)) {
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+ continue;
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+ }
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+ name = line;
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+ break;
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+ }
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+ }
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+ fclose(name_fh);
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+
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+ if (name) {
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+ return g_strdup(name);
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+ }
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+ }
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+
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uuid_info = qmp_query_uuid(NULL);
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if (strcmp(uuid_info->UUID, UUID_NONE) == 0) {
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name = qemu_get_vm_name();
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