From 7ea0c04c8a96a420be459427f9d15768cfccce70 Mon Sep 17 00:00:00 2001 Message-Id: <7ea0c04c8a96a420be459427f9d15768cfccce70@dist-git> From: Michal Privoznik Date: Fri, 6 Mar 2020 15:52:22 +0100 Subject: [PATCH] RHEL: virscsi: Support TAPEs in virSCSIDeviceGetDevName() If the SCSI device we want to get /dev node name for is TAPE device we need to look at 'tape' symlink in the sysfs dir corresponding to the device. https://bugzilla.redhat.com/show_bug.cgi?id=1808390 Signed-off-by: Michal Privoznik Signed-off-by: Andrea Bolognani Message-Id: <20200306145226.1610708-3-abologna@redhat.com> Reviewed-by: Jiri Denemark --- src/util/virscsi.c | 27 +++++++++++++++ tests/virscsidata/2-0-0-0/model | 1 + tests/virscsidata/2-0-0-0/scsi_tape/st0/dev | 1 + tests/virscsidata/2-0-0-0/sg3/dev | 1 + tests/virscsidata/2-0-0-0/tape | 1 + tests/virscsidata/2-0-0-0/type | 1 + tests/virscsidata/2-0-0-0/vendor | 1 + tests/virscsidata/sg3 | 0 tests/virscsitest.c | 38 ++++++++++++++++++--- 9 files changed, 66 insertions(+), 5 deletions(-) create mode 100644 tests/virscsidata/2-0-0-0/model create mode 100644 tests/virscsidata/2-0-0-0/scsi_tape/st0/dev create mode 100644 tests/virscsidata/2-0-0-0/sg3/dev create mode 120000 tests/virscsidata/2-0-0-0/tape create mode 100644 tests/virscsidata/2-0-0-0/type create mode 100644 tests/virscsidata/2-0-0-0/vendor create mode 100644 tests/virscsidata/sg3 diff --git a/src/util/virscsi.c b/src/util/virscsi.c index 770f727cac..6165196423 100644 --- a/src/util/virscsi.c +++ b/src/util/virscsi.c @@ -224,6 +224,31 @@ virSCSIDeviceGetDevNameBlock(const char *prefix, } +static char * +virSCSIDeviceGetDevNameTape(const char *prefix, + unsigned int adapter, + unsigned int bus, + unsigned int target, + unsigned long long unit) +{ + g_autofree char *path = NULL; + g_autofree char *resolvedPath = NULL; + g_autoptr(GError) err = NULL; + + path = g_strdup_printf("%s/%d:%u:%u:%llu/tape", + prefix, adapter, bus, target, unit); + + if (!(resolvedPath = g_file_read_link(path, &err))) { + virReportError(VIR_ERR_SYSTEM_ERROR, + _("Unable to read link: %s"), + err->message); + return NULL; + } + + return g_path_get_basename(resolvedPath); +} + + /* Returns device name (e.g. "sdc") on success, or NULL * on failure. */ @@ -250,6 +275,8 @@ virSCSIDeviceGetDevName(const char *sysfs_prefix, return virSCSIDeviceGetDevNameBlock(prefix, adapter_id, bus, target, unit); case VIR_SCSI_DEVICE_TYPE_TAPE: + return virSCSIDeviceGetDevNameTape(prefix, adapter_id, bus, target, unit); + case VIR_SCSI_DEVICE_TYPE_PRINTER: case VIR_SCSI_DEVICE_TYPE_PROCESSOR: case VIR_SCSI_DEVICE_TYPE_WORM: diff --git a/tests/virscsidata/2-0-0-0/model b/tests/virscsidata/2-0-0-0/model new file mode 100644 index 0000000000..d2ab4715c3 --- /dev/null +++ b/tests/virscsidata/2-0-0-0/model @@ -0,0 +1 @@ +scsi_debug diff --git a/tests/virscsidata/2-0-0-0/scsi_tape/st0/dev b/tests/virscsidata/2-0-0-0/scsi_tape/st0/dev new file mode 100644 index 0000000000..3dd777e840 --- /dev/null +++ b/tests/virscsidata/2-0-0-0/scsi_tape/st0/dev @@ -0,0 +1 @@ +9:0 diff --git a/tests/virscsidata/2-0-0-0/sg3/dev b/tests/virscsidata/2-0-0-0/sg3/dev new file mode 100644 index 0000000000..b369a59b3e --- /dev/null +++ b/tests/virscsidata/2-0-0-0/sg3/dev @@ -0,0 +1 @@ +21:3 diff --git a/tests/virscsidata/2-0-0-0/tape b/tests/virscsidata/2-0-0-0/tape new file mode 120000 index 0000000000..6ca7f77539 --- /dev/null +++ b/tests/virscsidata/2-0-0-0/tape @@ -0,0 +1 @@ +scsi_tape/st0 \ No newline at end of file diff --git a/tests/virscsidata/2-0-0-0/type b/tests/virscsidata/2-0-0-0/type new file mode 100644 index 0000000000..d00491fd7e --- /dev/null +++ b/tests/virscsidata/2-0-0-0/type @@ -0,0 +1 @@ +1 diff --git a/tests/virscsidata/2-0-0-0/vendor b/tests/virscsidata/2-0-0-0/vendor new file mode 100644 index 0000000000..9b075671ea --- /dev/null +++ b/tests/virscsidata/2-0-0-0/vendor @@ -0,0 +1 @@ +Linux diff --git a/tests/virscsidata/sg3 b/tests/virscsidata/sg3 new file mode 100644 index 0000000000..e69de29bb2 diff --git a/tests/virscsitest.c b/tests/virscsitest.c index c96699e157..924b77af08 100644 --- a/tests/virscsitest.c +++ b/tests/virscsitest.c @@ -33,17 +33,33 @@ VIR_LOG_INIT("tests.scsitest"); static char *virscsi_prefix; +typedef struct { + const char *adapter; + unsigned int bus; + unsigned int target; + unsigned int unit; + const char *expectedName; +} testGetDevNameData; + static int -test1(const void *data G_GNUC_UNUSED) +testGetDevName(const void *opaque) { + const testGetDevNameData *data = opaque; g_autofree char *name = NULL; if (!(name = virSCSIDeviceGetDevName(virscsi_prefix, - "scsi_host1", 0, 0, 0))) + data->adapter, + data->bus, + data->target, + data->unit))) return -1; - if (STRNEQ(name, "sdh")) + if (STRNEQ(name, data->expectedName)) { + fprintf(stderr, + "SCSI dev name mismatch, expected %s got %s", + data->expectedName, name); return -1; + } return 0; } @@ -200,15 +216,27 @@ mymain(void) CREATE_SYMLINK("0-0-0-0", "0:0:0:0"); CREATE_SYMLINK("1-0-0-0", "1:0:0:0"); + CREATE_SYMLINK("2-0-0-0", "2:0:0:0"); CREATE_SYMLINK("sg0", "sg0"); + CREATE_SYMLINK("sg3", "sg3"); CREATE_SYMLINK("sg8", "sg8"); VIR_FREE(virscsi_prefix); virscsi_prefix = g_strdup(tmpdir); - if (virTestRun("test1", test1, NULL) < 0) - ret = -1; +#define TEST_GET_DEV_NAME(adapter, bus, target, unit, expectedName) \ + do { \ + testGetDevNameData data = {adapter, bus, target, unit, expectedName}; \ + if (virTestRun("test getDevname " expectedName, \ + testGetDevName, &data) < 0) \ + ret = -1; \ + } while (0) + + TEST_GET_DEV_NAME("scsi_host0", 0, 0, 0, "sda"); + TEST_GET_DEV_NAME("scsi_host1", 0, 0, 0, "sdh"); + TEST_GET_DEV_NAME("scsi_host2", 0, 0, 0, "st0"); + if (virTestRun("test2", test2, NULL) < 0) ret = -1; -- 2.34.1