40 lines
1.2 KiB
Diff
40 lines
1.2 KiB
Diff
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From c83e5a977a2510de872d48a4d3bebc94dac0ed8f Mon Sep 17 00:00:00 2001
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From: Mark Fasheh <mfasheh@suse.com>
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Date: Fri, 13 May 2011 16:01:39 -0700
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Subject: [PATCH 2/2] btrfs: Introduce btrfs_get_maps_dev()
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References: bnc#672923
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Patch-mainline: Never
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Use this to return the subvolume superblock in proc instead of the global
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superblock which is automatically taken today. This fixes a userspace
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breakage where discrepancies between the devices two would confuse software
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such as lsof.
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Signed-off-by: Mark Fasheh <mfasheh@suse.com>
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---
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fs/btrfs/super.c | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/fs/btrfs/super.c
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+++ b/fs/btrfs/super.c
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@@ -1301,6 +1301,11 @@ static void btrfs_fs_dirty_inode(struct
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"error %d\n", btrfs_ino(inode), ret);
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}
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+static dev_t btrfs_get_maps_dev(struct inode *inode)
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+{
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+ return BTRFS_I(inode)->root->anon_dev;
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+}
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+
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static const struct super_operations btrfs_super_ops = {
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.drop_inode = btrfs_drop_inode,
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.evict_inode = btrfs_evict_inode,
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@@ -1315,6 +1320,7 @@ static const struct super_operations btr
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.remount_fs = btrfs_remount,
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.freeze_fs = btrfs_freeze,
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.unfreeze_fs = btrfs_unfreeze,
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+ .get_maps_dev = btrfs_get_maps_dev,
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};
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static const struct file_operations btrfs_ctl_fops = {
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