aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/md
diff options
context:
space:
mode:
authorMike Anderson <andmike@linux.vnet.ibm.com>2009-12-10 23:52:20 +0000
committerAlasdair G Kergon <agk@redhat.com>2009-12-10 23:52:20 +0000
commitc50abeb38026ea721a812cf8a9b2fac5d3b7684b (patch)
tree755a412a2aa8bacf35a278f1009229c64424b03c /drivers/md
parent432a212c0dd0f4ca386cf37c5b740ac9dbda4479 (diff)
downloadkernel_samsung_smdk4412-c50abeb38026ea721a812cf8a9b2fac5d3b7684b.zip
kernel_samsung_smdk4412-c50abeb38026ea721a812cf8a9b2fac5d3b7684b.tar.gz
kernel_samsung_smdk4412-c50abeb38026ea721a812cf8a9b2fac5d3b7684b.tar.bz2
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: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-ioctl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index bf3d19a..d06dd39 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -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);