cmd: blkls: Add blkls command

Add a command to print a list of available block device drivers,
and for each, the list of known block devices.

Signed-off-by: Niel Fourie <lusus@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 192b3b2..0ead88e 100644 (file)
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1088,6 +1088,13 @@ config CMD_LOADS
        help
          Load an S-Record file over serial line
 
+config CMD_LSBLK
+       depends on BLK
+       bool "lsblk - list block drivers and devices"
+       help
+         Print list of available block device drivers, and for each, the list
+         of known block devices.
+
 config CMD_MMC
        bool "mmc"
        help

diff --git a/cmd/Makefile b/cmd/Makefile
index 974ad48..006075a 100644 (file)
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -84,6 +84,7 @@ obj-$(CONFIG_CMD_LED) += led.o
 obj-$(CONFIG_CMD_LICENSE) += license.o
 obj-y += load.o
 obj-$(CONFIG_CMD_LOG) += log.o
+obj-$(CONFIG_CMD_LSBLK) += lsblk.o
 obj-$(CONFIG_ID_EEPROM) += mac.o
 obj-$(CONFIG_CMD_MD5SUM) += md5sum.o
 obj-$(CONFIG_CMD_MEMORY) += mem.o

diff --git a/cmd/lsblk.c b/cmd/lsblk.c
new file mode 100644 (file)
index 0000000..ece8bbf
--- /dev/null
+++ b/cmd/lsblk.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2020
+ * Niel Fourie, DENX Software Engineering, lusus@denx.de.
+ */
+
+#include <common.h>
+#include <dm.h>
+
+static int do_lsblk(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
+{
+       struct driver *d = ll_entry_start(struct driver, driver);
+       const int n_ents = ll_entry_count(struct driver, driver);
+       struct driver *entry;
+       struct udevice *udev;
+       struct uclass *uc;
+       struct blk_desc *desc;
+       int ret, i;
+
+       ret = uclass_get(UCLASS_BLK, &uc);
+       if (ret) {
+               puts("Could not get BLK uclass.\n");
+               return CMD_RET_FAILURE;
+       }
+       puts("Block Driver          Devices\n");
+       puts("-----------------------------\n");
+       for (entry = d; entry < d + n_ents; entry++) {
+               if (entry->id != UCLASS_BLK)
+                       continue;
+               i = 0;
+               printf("%-20.20s", entry->name);
+               uclass_foreach_dev(udev, uc) {
+                       if (udev->driver != entry)
+                               continue;
+                       desc = dev_get_uclass_platdata(udev);
+                       printf("%c %s %u", i ? ',' : ':',
+                              blk_get_if_type_name(desc->if_type),
+                              desc->devnum);
+                       i++;
+               }
+               if (!i)
+                       puts(": <none>");
+               puts("\n");
+       }
+
+       return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(lsblk, 1, 0, do_lsblk, "list block drivers and devices",
+          "- display list of block device drivers and attached block devices"
+);

diff --git a/test/py/tests/test_lsblk.py b/test/py/tests/test_lsblk.py
new file mode 100644 (file)
index 0000000..40ffe01
--- /dev/null
+++ b/test/py/tests/test_lsblk.py
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (C) 2020
+# Niel Fourie, DENX Software Engineering, lusus@denx.de
+
+import pytest
+
+@pytest.mark.buildconfigspec('blk')
+@pytest.mark.buildconfigspec('cmd_lsblk')
+def test_lsblk(u_boot_console):
+    """Test that `lsblk` prints a result which includes `host`."""
+    output = u_boot_console.run_command('lsblk')
+    assert "Block Driver" in output
+    assert "sandbox_host_blk" in output