test_fs: Allow testing FS_GENERIC

The generic filesystem interface was so far untested. The interface
is similar to the FS specific interfaces with FS specific prefixes,
like ext4ls, fatmkdir, ... but it does not have any prefixes, i.e.
it provides plain ls, mkdir, ... commands.

Extend the test parameters to include 'fs_cmd_prefix' and optionally
'fs_cmd_write' parameters. The 'fs_cmd_prefix' allow specifying the
filesystem specific command prefix, like 'ext4' in 'ext4ls'. The
'fs_cmd_write' allows selecting between 'write'/'save' command name
for storing files into the filesystem, see last paragraph.

Introduce new 'fs_generic' fs_type which is used to parametrize existing
tests and run them without any prefixes if detected, thus testing the
generic filesystem interface. Use the fatfs as the backing store for the
generic FS tests.

The check_ubconfig needs to be slightly adjusted to avoid test for
CMD_FS_GENERIC_WRITE which does not exist separately from CMD_FS_GENERIC.

The CMD_FS_GENERIC does not provide generic 'write' command, instead
the generic equivalent command is called 'save' . Add simple ternary
oeprator to use 'save' command for CMD_FS_GENERIC tests and '..write'
commands for filesystem specific tests.

Enable generic filesystem tests for basic/extended/mkdir/unlink tests.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/test/py/tests/test_fs/test_ext.py b/test/py/tests/test_fs/test_ext.py
index 9c213f2..a75cd74 100644
--- a/test/py/tests/test_fs/test_ext.py
+++ b/test/py/tests/test_fs/test_ext.py
@@ -33,20 +33,20 @@
         """
         Test Case 1 - write a file with absolute path
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 1 - write with abs path'):
             # Test Case 1a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w1 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w1 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             assert('20480 bytes written' in ''.join(output))
 
             # Test Case 1b - Check md5 of file content
             output = ubman.run_command_list([
                 'mw.b %x 00 100' % ADDR,
-                '%sload host 0:0 %x /dir1/%s.w1' % (fs_type, ADDR, MIN_FILE),
+                '%sload host 0:0 %x /dir1/%s.w1' % (fs_cmd_prefix, ADDR, MIN_FILE),
                 'md5sum %x $filesize' % ADDR,
                 'setenv filesize'])
             assert(md5val[0] in ''.join(output))
@@ -56,20 +56,20 @@
         """
         Test Case 2 - write to a file with relative path
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 2 - write with rel path'):
             # Test Case 2a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x dir1/%s.w2 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x dir1/%s.w2 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             assert('20480 bytes written' in ''.join(output))
 
             # Test Case 2b - Check md5 of file content
             output = ubman.run_command_list([
                 'mw.b %x 00 100' % ADDR,
-                '%sload host 0:0 %x dir1/%s.w2' % (fs_type, ADDR, MIN_FILE),
+                '%sload host 0:0 %x dir1/%s.w2' % (fs_cmd_prefix, ADDR, MIN_FILE),
                 'md5sum %x $filesize' % ADDR,
                 'setenv filesize'])
             assert(md5val[0] in ''.join(output))
@@ -79,14 +79,14 @@
         """
         Test Case 3 - write to a file with invalid path
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 3 - write with invalid path'):
             # Test Case 3 - Check if command expectedly failed
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/none/%s.w3 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/none/%s.w3 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             assert('Unable to write file /dir1/none/' in ''.join(output))
             assert_fs_integrity(fs_type, fs_img)
 
@@ -94,22 +94,22 @@
         """
         Test Case 4 - write at non-zero offset, enlarging file size
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 4 - write at non-zero offset, enlarging file size'):
             # Test Case 4a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w4 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w4 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             output = ubman.run_command(
-                '%swrite host 0:0 %x /dir1/%s.w4 $filesize 0x1400'
-                    % (fs_type, ADDR, MIN_FILE))
+                '%s%s host 0:0 %x /dir1/%s.w4 $filesize 0x1400'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE))
             assert('20480 bytes written' in output)
 
             # Test Case 4b - Check size of written file
             output = ubman.run_command_list([
-                '%ssize host 0:0 /dir1/%s.w4' % (fs_type, MIN_FILE),
+                '%ssize host 0:0 /dir1/%s.w4' % (fs_cmd_prefix, MIN_FILE),
                 'printenv filesize',
                 'setenv filesize'])
             assert('filesize=6400' in ''.join(output))
@@ -117,7 +117,7 @@
             # Test Case 4c - Check md5 of file content
             output = ubman.run_command_list([
                 'mw.b %x 00 100' % ADDR,
-                '%sload host 0:0 %x /dir1/%s.w4' % (fs_type, ADDR, MIN_FILE),
+                '%sload host 0:0 %x /dir1/%s.w4' % (fs_cmd_prefix, ADDR, MIN_FILE),
                 'md5sum %x $filesize' % ADDR,
                 'setenv filesize'])
             assert(md5val[1] in ''.join(output))
@@ -127,22 +127,22 @@
         """
         Test Case 5 - write at non-zero offset, shrinking file size
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 5 - write at non-zero offset, shrinking file size'):
             # Test Case 5a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w5 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w5 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             output = ubman.run_command(
-                '%swrite host 0:0 %x /dir1/%s.w5 0x1400 0x1400'
-                    % (fs_type, ADDR, MIN_FILE))
+                '%s%s host 0:0 %x /dir1/%s.w5 0x1400 0x1400'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE))
             assert('5120 bytes written' in output)
 
             # Test Case 5b - Check size of written file
             output = ubman.run_command_list([
-                '%ssize host 0:0 /dir1/%s.w5' % (fs_type, MIN_FILE),
+                '%ssize host 0:0 /dir1/%s.w5' % (fs_cmd_prefix, MIN_FILE),
                 'printenv filesize',
                 'setenv filesize'])
             assert('filesize=2800' in ''.join(output))
@@ -150,7 +150,7 @@
             # Test Case 5c - Check md5 of file content
             output = ubman.run_command_list([
                 'mw.b %x 00 100' % ADDR,
-                '%sload host 0:0 %x /dir1/%s.w5' % (fs_type, ADDR, MIN_FILE),
+                '%sload host 0:0 %x /dir1/%s.w5' % (fs_cmd_prefix, ADDR, MIN_FILE),
                 'md5sum %x $filesize' % ADDR,
                 'setenv filesize'])
             assert(md5val[2] in ''.join(output))
@@ -160,22 +160,22 @@
         """
         Test Case 6 - write nothing at the start, truncating to zero
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 6 - write nothing at the start, truncating to zero'):
             # Test Case 6a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w6 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w6 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             output = ubman.run_command(
-                '%swrite host 0:0 %x /dir1/%s.w6 0 0'
-                    % (fs_type, ADDR, MIN_FILE))
+                '%s%s host 0:0 %x /dir1/%s.w6 0 0'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE))
             assert('0 bytes written' in output)
 
             # Test Case 6b - Check size of written file
             output = ubman.run_command_list([
-                '%ssize host 0:0 /dir1/%s.w6' % (fs_type, MIN_FILE),
+                '%ssize host 0:0 /dir1/%s.w6' % (fs_cmd_prefix, MIN_FILE),
                 'printenv filesize',
                 'setenv filesize'])
             assert('filesize=0' in ''.join(output))
@@ -185,22 +185,22 @@
         """
         Test Case 7 - write at the end (append)
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 7 - write at the end (append)'):
             # Test Case 7a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w7 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w7 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             output = ubman.run_command(
-                '%swrite host 0:0 %x /dir1/%s.w7 $filesize $filesize'
-                    % (fs_type, ADDR, MIN_FILE))
+                '%s%s host 0:0 %x /dir1/%s.w7 $filesize $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE))
             assert('20480 bytes written' in output)
 
             # Test Case 7b - Check size of written file
             output = ubman.run_command_list([
-                '%ssize host 0:0 /dir1/%s.w7' % (fs_type, MIN_FILE),
+                '%ssize host 0:0 /dir1/%s.w7' % (fs_cmd_prefix, MIN_FILE),
                 'printenv filesize',
                 'setenv filesize'])
             assert('filesize=a000' in ''.join(output))
@@ -208,7 +208,7 @@
             # Test Case 7c - Check md5 of file content
             output = ubman.run_command_list([
                 'mw.b %x 00 100' % ADDR,
-                '%sload host 0:0 %x /dir1/%s.w7' % (fs_type, ADDR, MIN_FILE),
+                '%sload host 0:0 %x /dir1/%s.w7' % (fs_cmd_prefix, ADDR, MIN_FILE),
                 'md5sum %x $filesize' % ADDR,
                 'setenv filesize'])
             assert(md5val[3] in ''.join(output))
@@ -218,17 +218,17 @@
         """
         Test Case 8 - write at offset beyond the end of file
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 8 - write beyond the end'):
             # Test Case 8a - Check if command expectedly failed
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w8 $filesize'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w8 $filesize'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             output = ubman.run_command(
-                '%swrite host 0:0 %x /dir1/%s.w8 0x1400 %x'
-                    % (fs_type, ADDR, MIN_FILE, 0x100000 + 0x1400))
+                '%s%s host 0:0 %x /dir1/%s.w8 0x1400 %x'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE, 0x100000 + 0x1400))
             assert('Unable to write file /dir1' in output)
             assert_fs_integrity(fs_type, fs_img)
 
@@ -236,14 +236,14 @@
         """
         Test Case 9 - write to a non-existing file at non-zero offset
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 9 - write to non-existing file with non-zero offset'):
             # Test Case 9a - Check if command expectedly failed
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%sload host 0:0 %x /%s' % (fs_type, ADDR, MIN_FILE),
-                '%swrite host 0:0 %x /dir1/%s.w9 0x1400 0x1400'
-                    % (fs_type, ADDR, MIN_FILE)])
+                '%sload host 0:0 %x /%s' % (fs_cmd_prefix, ADDR, MIN_FILE),
+                '%s%s host 0:0 %x /dir1/%s.w9 0x1400 0x1400'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MIN_FILE)])
             assert('Unable to write file /dir1' in ''.join(output))
             assert_fs_integrity(fs_type, fs_img)
 
@@ -252,7 +252,7 @@
         'Test Case 10 - create/delete as many directories under root directory
         as amount of directory entries goes beyond one cluster size)'
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 10 - create/delete (many)'):
             # Test Case 10a - Create many files
             #   Please note that the size of directory entry is 32 bytes.
@@ -262,9 +262,9 @@
 
             for i in range(0, 66):
                 output = ubman.run_command(
-                    '%swrite host 0:0 %x /FILE0123456789_%02x 100'
-                    % (fs_type, ADDR, i))
-            output = ubman.run_command('%sls host 0:0 /' % fs_type)
+                    '%s%s host 0:0 %x /FILE0123456789_%02x 100'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, i))
+            output = ubman.run_command('%sls host 0:0 /' % fs_cmd_prefix)
             assert('FILE0123456789_00' in output)
             assert('FILE0123456789_41' in output)
 
@@ -272,8 +272,8 @@
             for i in range(0, 66):
                 output = ubman.run_command(
                     '%srm host 0:0 /FILE0123456789_%02x'
-                    % (fs_type, i))
-            output = ubman.run_command('%sls host 0:0 /' % fs_type)
+                    % (fs_cmd_prefix, i))
+            output = ubman.run_command('%sls host 0:0 /' % fs_cmd_prefix)
             assert(not 'FILE0123456789_00' in output)
             assert(not 'FILE0123456789_41' in output)
 
@@ -281,9 +281,9 @@
             # Please note no.64 and 65 are intentionally re-created
             for i in range(64, 128):
                 output = ubman.run_command(
-                    '%swrite host 0:0 %x /FILE0123456789_%02x 100'
-                    % (fs_type, ADDR, i))
-            output = ubman.run_command('%sls host 0:0 /' % fs_type)
+                    '%s%s host 0:0 %x /FILE0123456789_%02x 100'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, i))
+            output = ubman.run_command('%sls host 0:0 /' % fs_cmd_prefix)
             assert('FILE0123456789_40' in output)
             assert('FILE0123456789_79' in output)
 
@@ -294,7 +294,7 @@
         'Test Case 11 - create/delete as many directories under non-root
         directory as amount of directory entries goes beyond one cluster size)'
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 11 - create/delete (many)'):
             # Test Case 11a - Create many files
             #   Please note that the size of directory entry is 32 bytes.
@@ -304,9 +304,9 @@
 
             for i in range(0, 66):
                 output = ubman.run_command(
-                    '%swrite host 0:0 %x /dir1/FILE0123456789_%02x 100'
-                    % (fs_type, ADDR, i))
-            output = ubman.run_command('%sls host 0:0 /dir1' % fs_type)
+                    '%s%s host 0:0 %x /dir1/FILE0123456789_%02x 100'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, i))
+            output = ubman.run_command('%sls host 0:0 /dir1' % fs_cmd_prefix)
             assert('FILE0123456789_00' in output)
             assert('FILE0123456789_41' in output)
 
@@ -314,8 +314,8 @@
             for i in range(0, 66):
                 output = ubman.run_command(
                     '%srm host 0:0 /dir1/FILE0123456789_%02x'
-                    % (fs_type, i))
-            output = ubman.run_command('%sls host 0:0 /dir1' % fs_type)
+                    % (fs_cmd_prefix, i))
+            output = ubman.run_command('%sls host 0:0 /dir1' % fs_cmd_prefix)
             assert(not 'FILE0123456789_00' in output)
             assert(not 'FILE0123456789_41' in output)
 
@@ -323,9 +323,9 @@
             # Please note no.64 and 65 are intentionally re-created
             for i in range(64, 128):
                 output = ubman.run_command(
-                    '%swrite host 0:0 %x /dir1/FILE0123456789_%02x 100'
-                    % (fs_type, ADDR, i))
-            output = ubman.run_command('%sls host 0:0 /dir1' % fs_type)
+                    '%s%s host 0:0 %x /dir1/FILE0123456789_%02x 100'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, i))
+            output = ubman.run_command('%sls host 0:0 /dir1' % fs_cmd_prefix)
             assert('FILE0123456789_40' in output)
             assert('FILE0123456789_79' in output)
 
@@ -335,15 +335,15 @@
         """
         Test Case 12 - write plain and mangle file
         """
-        fs_type,fs_img,md5val = fs_obj_ext
+        fs_type,fs_cmd_prefix,fs_cmd_write,fs_img,md5val = fs_obj_ext
         with ubman.log.section('Test Case 12 - write plain and mangle file'):
             # Test Case 12a - Check if command successfully returned
             output = ubman.run_command_list([
                 'host bind 0 %s' % fs_img,
-                '%swrite host 0:0 %x /%s 0'
-                    % (fs_type, ADDR, PLAIN_FILE),
-                '%swrite host 0:0 %x /%s 0'
-                    % (fs_type, ADDR, MANGLE_FILE)])
+                '%s%s host 0:0 %x /%s 0'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, PLAIN_FILE),
+                '%s%s host 0:0 %x /%s 0'
+                    % (fs_cmd_prefix, fs_cmd_write, ADDR, MANGLE_FILE)])
             assert('0 bytes written' in ''.join(output))
             # Test Case 12b - Read file system content
             output = check_output('mdir -i %s' % fs_img, shell=True).decode()