scsi_ioctl: support persistent reserve commands through ioctl for
non-root user.
Scsi persistent reserve commands need to be used for non-root user in
many scenarios.
EPERM error will be returned by sg_io() when PERSISTENT_RESERVE_OUT
or PERSISTENT_RESERVE_IN command is sent through ioctl() for
non-root user.
Add PERSISTENT_RESERVE_OUT and PERSISTENT_RESERVE_IN into
blk_default_cmd_filter in blk_set_cmd_filter_defaults() to support
persistent reserve commands for non-root user.
Signed-off-by: Jiang Biao <jiang.bi...@zte.com.cn>
Signed-off-by: Li Ping <li.ping...@zte.com.cn>
Reviewed-by: Liu Jianjun <liu.jianj...@zte.com.cn>
diff -urpN block/scsi_ioctl.c block_new/scsi_ioctl.c
--- block/scsi_ioctl.c 2015-08-01 17:07:47.000000000 +0800
+++ block_new/scsi_ioctl.c 2015-08-01 17:09:56.000000000 +0800
@@ -202,6 +202,9 @@ static void blk_set_cmd_filter_defaults(
__set_bit(GPCMD_LOAD_UNLOAD, filter->write_ok);
__set_bit(GPCMD_SET_STREAMING, filter->write_ok);
__set_bit(GPCMD_SET_READ_AHEAD, filter->write_ok);
+ /* Persistent reserve command*/
+ __set_bit(PERSISTENT_RESERVE_IN, filter->read_ok);
+ __set_bit(PERSISTENT_RESERVE_OUT, filter->write_ok);
}
int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm)
