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authorPhilipp Reisner <philipp.reisner@linbit.com>2011-05-04 10:06:52 +0200
committerPhilipp Reisner <philipp.reisner@linbit.com>2012-11-08 16:55:44 +0100
commitd589a21e5d9099a6351862ae6a7f4ae5ec4103d4 (patch)
tree5cf90cdc5e49cff6ad946882854bce7c0aa6ee2e /drivers
parent9958c857c760eec76f4fdf288b6f33a1c3b41833 (diff)
downloadvexpress-lsk-d589a21e5d9099a6351862ae6a7f4ae5ec4103d4.tar.gz
drbd: Enforce limits of disk_conf members; centralized these checks
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/block/drbd/drbd_nl.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 7fda3d9445c..812e91f1b6d 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -937,9 +937,6 @@ static int drbd_check_al_size(struct drbd_conf *mdev, struct disk_conf *dc)
unsigned int in_use;
int i;
- if (!expect(dc->al_extents >= DRBD_AL_EXTENTS_MIN))
- dc->al_extents = DRBD_AL_EXTENTS_MIN;
-
if (mdev->act_log &&
mdev->act_log->nr_elements == dc->al_extents)
return 0;
@@ -1102,6 +1099,17 @@ static bool should_set_defaults(struct genl_info *info)
return 0 != (flags & DRBD_GENL_F_SET_DEFAULTS);
}
+static void enforce_disk_conf_limits(struct disk_conf *dc)
+{
+ if (dc->al_extents < DRBD_AL_EXTENTS_MIN)
+ dc->al_extents = DRBD_AL_EXTENTS_MIN;
+ if (dc->al_extents > DRBD_AL_EXTENTS_MAX)
+ dc->al_extents = DRBD_AL_EXTENTS_MAX;
+
+ if (dc->c_plan_ahead > DRBD_C_PLAN_AHEAD_MAX)
+ dc->c_plan_ahead = DRBD_C_PLAN_AHEAD_MAX;
+}
+
int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
@@ -1146,11 +1154,7 @@ int drbd_adm_disk_opts(struct sk_buff *skb, struct genl_info *info)
if (!expect(new_disk_conf->resync_rate >= 1))
new_disk_conf->resync_rate = 1;
- /* clip to allowed range */
- if (!expect(new_disk_conf->al_extents >= DRBD_AL_EXTENTS_MIN))
- new_disk_conf->al_extents = DRBD_AL_EXTENTS_MIN;
- if (!expect(new_disk_conf->al_extents <= DRBD_AL_EXTENTS_MAX))
- new_disk_conf->al_extents = DRBD_AL_EXTENTS_MAX;
+ enforce_disk_conf_limits(new_disk_conf);
fifo_size = (new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ;
if (fifo_size != mdev->rs_plan_s->size) {
@@ -1273,6 +1277,8 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
goto fail;
}
+ enforce_disk_conf_limits(new_disk_conf);
+
new_plan = fifo_alloc((new_disk_conf->c_plan_ahead * 10 * SLEEP_TIME) / HZ);
if (!new_plan) {
retcode = ERR_NOMEM;
@@ -1450,8 +1456,6 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
else
clear_bit(MD_NO_FUA, &mdev->flags);
- /* FIXME Missing stuff: clip al range */
-
/* Point of no return reached.
* Devices and memory are no longer released by error cleanup below.
* now mdev takes over responsibility, and the state engine should