cmdfilter: extend default read filter

This patch adds the commands that the former sg filter allowed for read
access to the cmdfilter to keep userspace apps that rely on them working.
Signed-off-by: NAdel Gadllah <adel.gadllah@gmail.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

block/cmd-filter.c

@@ -219,6 +219,10 @@ static struct kobj_type rcf_ktype = {
 	.default_attrs = default_attrs,
 };
 
+#ifndef MAINTENANCE_IN_CMD
+#define MAINTENANCE_IN_CMD 0xa3
+#endif
+
 static void rcf_set_defaults(struct blk_scsi_cmd_filter *filter)
 {
 	/* Basic read-only commands */
@@ -230,6 +234,7 @@ static void rcf_set_defaults(struct blk_scsi_cmd_filter *filter)
 	__set_bit(READ_16, filter->read_ok);
 	__set_bit(READ_BUFFER, filter->read_ok);
 	__set_bit(READ_DEFECT_DATA, filter->read_ok);
+	__set_bit(READ_CAPACITY, filter->read_ok);
 	__set_bit(READ_LONG, filter->read_ok);
 	__set_bit(INQUIRY, filter->read_ok);
 	__set_bit(MODE_SENSE, filter->read_ok);
@@ -238,6 +243,10 @@ static void rcf_set_defaults(struct blk_scsi_cmd_filter *filter)
 	__set_bit(START_STOP, filter->read_ok);
 	__set_bit(GPCMD_VERIFY_10, filter->read_ok);
 	__set_bit(VERIFY_16, filter->read_ok);
+	__set_bit(REPORT_LUNS, filter->read_ok);
+	__set_bit(SERVICE_ACTION_IN, filter->read_ok);
+	__set_bit(RECEIVE_DIAGNOSTIC, filter->read_ok);
+	__set_bit(MAINTENANCE_IN_CMD, filter->read_ok);
 	__set_bit(GPCMD_READ_BUFFER_CAPACITY, filter->read_ok);
 
 	/* Audio CD commands */

drivers/scsi/sg.c

@@ -2502,10 +2502,6 @@ sg_page_free(struct page *page, int size)
 	__free_pages(page, order);
 }
 
-#ifndef MAINTENANCE_IN_CMD
-#define MAINTENANCE_IN_CMD 0xa3
-#endif
-
 #ifdef CONFIG_SCSI_PROC_FS
 static int
 sg_idr_max_id(int id, void *p, void *data)