block: export blk_verify_command for SG v4

blk_fill_sghdr_rq doesn't work for SG v4 so verify_command needed to
be exported.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index daded70ffbb1..db53b2c268d3 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -112,7 +112,7 @@ static int sg_emulated_host(request_queue_t *q, int __user *p)
 #define safe_for_read(cmd)      [cmd] = CMD_READ_SAFE
 #define safe_for_write(cmd)     [cmd] = CMD_WRITE_SAFE
 
-static int verify_command(unsigned char *cmd, int has_write_perm)
+int blk_verify_command(unsigned char *cmd, int has_write_perm)
 {
         static unsigned char cmd_type[256] = {
 
@@ -212,6 +212,7 @@ static int verify_command(unsigned char *cmd, int has_write_perm)
         /* Otherwise fail it with an "Operation not permitted" */
         return -EPERM;
 }
+EXPORT_SYMBOL_GPL(blk_verify_command);
 
 int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
                       struct sg_io_hdr *hdr, int has_write_perm)
@@ -220,7 +221,7 @@ int blk_fill_sghdr_rq(request_queue_t *q, struct request *rq,
 
         if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
                 return -EFAULT;
-        if (verify_command(rq->cmd, has_write_perm))
+        if (blk_verify_command(rq->cmd, has_write_perm))
                 return -EPERM;
 
         /*
@@ -457,7 +458,7 @@ int sg_scsi_ioctl(struct file *file, struct request_queue *q,
         if (in_len && copy_from_user(buffer, sic->data + cmdlen, in_len))
                 goto error;
 
-        err = verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
+        err = blk_verify_command(rq->cmd, file->f_mode & FMODE_WRITE);
         if (err)
                 goto error;