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authorPeter Lieven <pl@kamp.de>2015-06-26 12:18:01 +0200
committerStefan Hajnoczi <stefanha@redhat.com>2015-07-02 10:06:23 +0100
commit9049736ec70fdc886ac0df521fdd8b2886b2cb63 (patch)
tree50e6c746282e70e5b3240d65c8bbfbbaa06f1310
parentd7b25297920d18fa2a2cde1ed21fde38a88c935f (diff)
block/iscsi: restore compatiblity with libiscsi 1.9.0
RHEL7 and others are stuck with libiscsi 1.9.0 since there unfortunately was an ABI breakage after that release. Signed-off-by: Peter Lieven <pl@kamp.de> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1435313881-19366-1-git-send-email-pl@kamp.de Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
-rw-r--r--block/iscsi.c32
-rwxr-xr-xconfigure6
-rw-r--r--qemu-options.hx3
3 files changed, 32 insertions, 9 deletions
diff --git a/block/iscsi.c b/block/iscsi.c
index a6b8fe295b..50029168eb 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -169,6 +169,19 @@ static inline unsigned exp_random(double mean)
return -mean * log((double)rand() / RAND_MAX);
}
+/* SCSI_STATUS_TASK_SET_FULL and SCSI_STATUS_TIMEOUT were introduced
+ * in libiscsi 1.10.0 as part of an enum. The LIBISCSI_API_VERSION
+ * macro was introduced in 1.11.0. So use the API_VERSION macro as
+ * a hint that the macros are defined and define them ourselves
+ * otherwise to keep the required libiscsi version at 1.9.0 */
+#if !defined(LIBISCSI_API_VERSION)
+#define QEMU_SCSI_STATUS_TASK_SET_FULL 0x28
+#define QEMU_SCSI_STATUS_TIMEOUT 0x0f000002
+#else
+#define QEMU_SCSI_STATUS_TASK_SET_FULL SCSI_STATUS_TASK_SET_FULL
+#define QEMU_SCSI_STATUS_TIMEOUT SCSI_STATUS_TIMEOUT
+#endif
+
static void
iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
void *command_data, void *opaque)
@@ -189,11 +202,12 @@ iscsi_co_generic_cb(struct iscsi_context *iscsi, int status,
iTask->do_retry = 1;
goto out;
}
- if (status == SCSI_STATUS_BUSY || status == SCSI_STATUS_TIMEOUT ||
- status == SCSI_STATUS_TASK_SET_FULL) {
+ if (status == SCSI_STATUS_BUSY ||
+ status == QEMU_SCSI_STATUS_TIMEOUT ||
+ status == QEMU_SCSI_STATUS_TASK_SET_FULL) {
unsigned retry_time =
exp_random(iscsi_retry_times[iTask->retries - 1]);
- if (status == SCSI_STATUS_TIMEOUT) {
+ if (status == QEMU_SCSI_STATUS_TIMEOUT) {
/* make sure the request is rescheduled AFTER the
* reconnect is initiated */
retry_time = EVENT_INTERVAL * 2;
@@ -1355,7 +1369,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
- int i, ret = 0;
+ int i, ret = 0, timeout = 0;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
@@ -1425,7 +1439,15 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
goto out;
}
- iscsi_set_timeout(iscsi, parse_timeout(iscsi_url->target));
+ /* timeout handling is broken in libiscsi before 1.15.0 */
+ timeout = parse_timeout(iscsi_url->target);
+#if defined(LIBISCSI_API_VERSION) && LIBISCSI_API_VERSION >= 20150621
+ iscsi_set_timeout(iscsi, timeout);
+#else
+ if (timeout) {
+ error_report("iSCSI: ignoring timeout value for libiscsi <1.15.0");
+ }
+#endif
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) {
error_setg(errp, "iSCSI: Failed to connect to LUN : %s",
diff --git a/configure b/configure
index 08f9a22972..3063739a5e 100755
--- a/configure
+++ b/configure
@@ -3618,15 +3618,15 @@ if compile_prog "" "" ; then
fi
##########################################
-# Do we have libiscsi >= 1.10.0
+# Do we have libiscsi >= 1.9.0
if test "$libiscsi" != "no" ; then
- if $pkg_config --atleast-version=1.10.0 libiscsi; then
+ if $pkg_config --atleast-version=1.9.0 libiscsi; then
libiscsi="yes"
libiscsi_cflags=$($pkg_config --cflags libiscsi)
libiscsi_libs=$($pkg_config --libs libiscsi)
else
if test "$libiscsi" = "yes" ; then
- feature_not_found "libiscsi" "Install libiscsi >= 1.10.0"
+ feature_not_found "libiscsi" "Install libiscsi >= 1.9.0"
fi
libiscsi="no"
fi
diff --git a/qemu-options.hx b/qemu-options.hx
index 0bdd59f20b..7b8efbf03d 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -2296,7 +2296,8 @@ line or a configuration file.
Since version Qemu 2.4 it is possible to specify a iSCSI request timeout to detect
stalled requests and force a reestablishment of the session. The timeout
-is specified in seconds. The default is 0 which means no timeout.
+is specified in seconds. The default is 0 which means no timeout. Libiscsi
+1.15.0 or greater is required for this feature.
Example (without authentication):
@example