btrfs: fall back to global reservation when removing subvolumes

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I recently did some ENOSPC testing that involved filling the disk
while create and removing snapshots in a loop. During the test cycle,
I ran into an ENOSPC when trying to remove a snapshot, leaving the fs
stuck in ENOSPC even after a umount/mount cycle.

This patch allow subvolume removal to fall back onto the global
block reservation in order to succeed when it would have failed
otherwise.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

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This commit is contained in:

Jeff Mahoney 2013-07-09 16:37:21 -04:00 • committed by Chris Mason

parent 74be951087

commit ee3441b490

3 changed files with 12 additions and 5 deletions

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2

fs/btrfs/ctree.h

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8

fs/btrfs/extent-tree.c

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7

fs/btrfs/ioctl.c

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