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(parent: a1ee736) | patch
btrfs: allocate root item at snapshot ioctl time
authorDavid Sterba <dsterba@suse.com>
Tue, 10 Nov 2015 17:54:00 +0000 (18:54 +0100)
committerDavid Sterba <dsterba@suse.com>
Thu, 7 Jan 2016 14:20:54 +0000 (15:20 +0100)
commitb0c0ea6338d5018e02d27c5315084fb1a5d099f6
treebf2aa288dd2d98143b12ea1753739491c7eda54dtree | snapshot (tar.gz zip)
parenta1ee736268448d74af25737568e383acb84c3c18commit | diff
btrfs: allocate root item at snapshot ioctl time

The actual snapshot creation is delayed until transaction commit. If we
cannot get enough memory for the root item there, we have to fail the
whole transaction commit which is bad. So we'll allocate the memory at
the ioctl call and pass it along with the pending_snapshot struct. The
potential ENOMEM will be returned to the caller of snapshot ioctl.

Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/ioctl.c diff | blob | blame | history
fs/btrfs/transaction.c diff | blob | blame | history
fs/btrfs/transaction.h diff | blob | blame | history