btrfs: Sector Size check during Mount

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Gracefully fail when trying to mount a BTRFS file system that has a
sectorsize smaller than PAGE_SIZE.

On PPC it is possible to build a FS while using a 4k PAGE_SIZE kernel
then boot into a 64K PAGE_SIZE kernel.  Presently open_ctree fails in an
endless loop and hangs the machine in this situation.

My debugging has show this Sector size < Page size to be a non trivial
situation and a graceful exit from the situation would be nice for the
time being.

Signed-off-by: Keith Mannthey <kmannth@us.ibm.com>

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Keith Mannthey 2011-11-29 17:44:12 -08:00 • committed by David Sterba

parent d98456fcaf

commit 941b2ddf71

1 changed files with 6 additions and 0 deletions

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fs/btrfs/disk-io.c

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