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Commit c50abeb3 authored by Mike Anderson's avatar Mike Anderson Committed by Alasdair G Kergon
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dm ioctl: forbid messages to devices being deleted 



Once we begin deleting a device, prevent any further messages being sent
to targets of its table (to avoid races).

Signed-off-by: default avatarMike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent 432a212c

drivers/md/dm-ioctl.c

+6 −0
Original line number Diff line number Diff line
@@ -1303,6 +1303,11 @@ static int target_message(struct dm_ioctl *param, size_t param_size) 
	if (!table)

		goto out_argv;



	if (dm_deleting_md(md)) {

		r = -ENXIO;

		goto out_table;

	}



	ti = dm_table_find_target(table, tmsg->sector);

	if (!dm_target_is_valid(ti)) {

		DMWARN("Target message sector outside device.");
@@ -1314,6 +1319,7 @@ static int target_message(struct dm_ioctl *param, size_t param_size) 
		r = -EINVAL;

	}



 out_table:

	dm_table_put(table);

 out_argv:

	kfree(argv);