zonefs: Fix active zone accounting
If a file zone transitions to the offline or readonly state from an
active state, we must clear the zone active flag and decrement the
active seq file counter. Do so in zonefs_account_active() using the new
zonefs inode flags ZONEFS_ZONE_OFFLINE and ZONEFS_ZONE_READONLY. These
flags are set if necessary in zonefs_check_zone_condition() based on the
result of report zones operation after an IO error.
Fixes: 87c9ce3ffec9 ("zonefs: Add active seq file accounting")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index f0e8a00..2c53fbb 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -41,6 +41,13 @@
return;
/*
+ * For zones that transitioned to the offline or readonly condition,
+ * we only need to clear the active state.
+ */
+ if (zi->i_flags & (ZONEFS_ZONE_OFFLINE | ZONEFS_ZONE_READONLY))
+ goto out;
+
+ /*
* If the zone is active, that is, if it is explicitly open or
* partially written, check if it was already accounted as active.
*/
@@ -53,6 +60,7 @@
return;
}
+out:
/* The zone is not active. If it was, update the active count */
if (zi->i_flags & ZONEFS_ZONE_ACTIVE) {
zi->i_flags &= ~ZONEFS_ZONE_ACTIVE;
@@ -324,6 +332,7 @@
inode->i_flags |= S_IMMUTABLE;
inode->i_mode &= ~0777;
zone->wp = zone->start;
+ zi->i_flags |= ZONEFS_ZONE_OFFLINE;
return 0;
case BLK_ZONE_COND_READONLY:
/*
@@ -342,8 +351,10 @@
zone->cond = BLK_ZONE_COND_OFFLINE;
inode->i_mode &= ~0777;
zone->wp = zone->start;
+ zi->i_flags |= ZONEFS_ZONE_OFFLINE;
return 0;
}
+ zi->i_flags |= ZONEFS_ZONE_READONLY;
inode->i_mode &= ~0222;
return i_size_read(inode);
case BLK_ZONE_COND_FULL:
diff --git a/fs/zonefs/zonefs.h b/fs/zonefs/zonefs.h
index 4b3de66..1dbe781 100644
--- a/fs/zonefs/zonefs.h
+++ b/fs/zonefs/zonefs.h
@@ -39,8 +39,10 @@
return ZONEFS_ZTYPE_SEQ;
}
-#define ZONEFS_ZONE_OPEN (1 << 0)
-#define ZONEFS_ZONE_ACTIVE (1 << 1)
+#define ZONEFS_ZONE_OPEN (1U << 0)
+#define ZONEFS_ZONE_ACTIVE (1U << 1)
+#define ZONEFS_ZONE_OFFLINE (1U << 2)
+#define ZONEFS_ZONE_READONLY (1U << 3)
/*
* In-memory inode data.
