From f9a67b1182e5abfcfcec24762ea95a77332f035e Mon Sep 17 00:00:00 2001 From: Guoqing Jiang Date: Fri, 1 Apr 2016 17:08:49 +0800 Subject: md/bitmap: clear bitmap if bitmap_create failed If bitmap_create returns an error, we need to call either bitmap_destroy or bitmap_free to do clean up, and the selection is based on mddev->bitmap is set or not. And the sysfs_put(bitmap->sysfs_can_clear) is moved from bitmap_destroy to bitmap_free, and the comment of bitmap_create is changed as well. Signed-off-by: Guoqing Jiang Signed-off-by: Shaohua Li --- drivers/md/bitmap.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'drivers/md/bitmap.c') diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 7df6b4f1548a..2a0362fc2107 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1673,6 +1673,9 @@ static void bitmap_free(struct bitmap *bitmap) if (!bitmap) /* there was no bitmap */ return; + if (bitmap->sysfs_can_clear) + sysfs_put(bitmap->sysfs_can_clear); + if (mddev_is_clustered(bitmap->mddev) && bitmap->mddev->cluster_info && bitmap->cluster_slot == md_cluster_ops->slot_number(bitmap->mddev)) md_cluster_stop(bitmap->mddev); @@ -1712,15 +1715,13 @@ void bitmap_destroy(struct mddev *mddev) if (mddev->thread) mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT; - if (bitmap->sysfs_can_clear) - sysfs_put(bitmap->sysfs_can_clear); - bitmap_free(bitmap); } /* * initialize the bitmap structure * if this returns an error, bitmap_destroy must be called to do clean up + * once mddev->bitmap is set */ struct bitmap *bitmap_create(struct mddev *mddev, int slot) { @@ -1865,8 +1866,10 @@ int bitmap_copy_from_slot(struct mddev *mddev, int slot, struct bitmap_counts *counts; struct bitmap *bitmap = bitmap_create(mddev, slot); - if (IS_ERR(bitmap)) + if (IS_ERR(bitmap)) { + bitmap_free(bitmap); return PTR_ERR(bitmap); + } rv = bitmap_init_from_disk(bitmap, 0); if (rv) @@ -2170,14 +2173,14 @@ location_store(struct mddev *mddev, const char *buf, size_t len) else { mddev->bitmap = bitmap; rv = bitmap_load(mddev); - if (rv) { - bitmap_destroy(mddev); + if (rv) mddev->bitmap_info.offset = 0; - } } mddev->pers->quiesce(mddev, 0); - if (rv) + if (rv) { + bitmap_destroy(mddev); return rv; + } } } } -- cgit v1.2.1