[PATCH 02/14] block: don't print a message when the device went away

From: Christoph Hellwig <hch@lst.de>
To: linux-nvme@lists.infradead.org
Cc: Jens Axboe <axboe@kernel.dk>, Keith Busch <keith.busch@intel.com>,
	Sagi Grimberg <sagi@grimberg.me>, Hannes Reinecke <hare@suse.de>,
	linux-block@vger.kernel.org
Subject: [PATCH 02/14] block: don't print a message when the device went away
Date: Sat, 26 May 2018 12:27:23 +0200	[thread overview]
Message-ID: <20180526102735.31404-3-hch@lst.de> (raw)
In-Reply-To: <20180526102735.31404-1-hch@lst.de>

The information about a size change in this case just creates confusion.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/partition-generic.c |  4 ++--
 fs/block_dev.c            | 14 +++++++++-----
 include/linux/fs.h        |  2 +-
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/block/partition-generic.c b/block/partition-generic.c
index db57cced9b98..9fe4816a1289 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -518,7 +518,7 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
 
 	if (disk->fops->revalidate_disk)
 		disk->fops->revalidate_disk(disk);
-	check_disk_size_change(disk, bdev);
+	check_disk_size_change(disk, bdev, true);
 	bdev->bd_invalidated = 0;
 	if (!get_capacity(disk) || !(state = check_partition(disk, bdev)))
 		return 0;
@@ -643,7 +643,7 @@ int invalidate_partitions(struct gendisk *disk, struct block_device *bdev)
 		return res;
 
 	set_capacity(disk, 0);
-	check_disk_size_change(disk, bdev);
+	check_disk_size_change(disk, bdev, false);
 	bdev->bd_invalidated = 0;
 	/* tell userspace that the media / partition table may have changed */
 	kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 771ddfa29dc9..81c57c14fae8 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1322,21 +1322,25 @@ static void flush_disk(struct block_device *bdev, bool kill_dirty)
  * check_disk_size_change - checks for disk size change and adjusts bdev size.
  * @disk: struct gendisk to check
  * @bdev: struct bdev to adjust.
+ * @verbose: if %true log a message about a size change if there is any
  *
  * This routine checks to see if the bdev size does not match the disk size
  * and adjusts it if it differs. When shrinking the bdev size, its all caches
  * are freed.
  */
-void check_disk_size_change(struct gendisk *disk, struct block_device *bdev)
+void check_disk_size_change(struct gendisk *disk, struct block_device *bdev,
+		bool verbose)
 {
 	loff_t disk_size, bdev_size;
 
 	disk_size = (loff_t)get_capacity(disk) << 9;
 	bdev_size = i_size_read(bdev->bd_inode);
 	if (disk_size != bdev_size) {
-		printk(KERN_INFO
-		       "%s: detected capacity change from %lld to %lld\n",
-		       disk->disk_name, bdev_size, disk_size);
+		if (verbose) {
+			printk(KERN_INFO
+			       "%s: detected capacity change from %lld to %lld\n",
+			       disk->disk_name, bdev_size, disk_size);
+		}
 		i_size_write(bdev->bd_inode, disk_size);
 		if (bdev_size > disk_size)
 			flush_disk(bdev, false);
@@ -1363,7 +1367,7 @@ int revalidate_disk(struct gendisk *disk)
 		return ret;
 
 	mutex_lock(&bdev->bd_mutex);
-	check_disk_size_change(disk, bdev);
+	check_disk_size_change(disk, bdev, ret == 0);
 	bdev->bd_invalidated = 0;
 	mutex_unlock(&bdev->bd_mutex);
 	bdput(bdev);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 760d8da1b6c7..d8d4831af9ff 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2570,7 +2570,7 @@ extern bool is_bad_inode(struct inode *);
 
 #ifdef CONFIG_BLOCK
 extern void check_disk_size_change(struct gendisk *disk,
-				   struct block_device *bdev);
+		struct block_device *bdev, bool verbose);
 extern int revalidate_disk(struct gendisk *);
 extern int check_disk_change(struct block_device *);
 extern int __invalidate_device(struct block_device *, bool);
-- 
2.17.0
