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de49768 xfs: make growfs initialise the AGFL header
fd23683 xfs: growfs: use uncached buffers for new headers
b64f3a3 xfs: use btree block initialisation functions in growfs
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commit de497688daaabbab425a8a969528272ec1d962a6
Author: Dave Chinner <dchinner@xxxxxxxxxx>
Date: Mon Nov 12 22:54:00 2012 +1100
xfs: make growfs initialise the AGFL header
For verification purposes, AGFLs need to be initialised to a known
set of values. For upcoming CRC changes, they are also headers that
need to be initialised. Currently, growfs does neither for the AGFLs
- it ignores them completely. Add initialisation of the AGFL to be
full of invalid block numbers (NULLAGBLOCK) to put the
infrastructure in place needed for CRC support.
Includes a comment clarification from Jeff Liu.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by Rich Johnston <rjohnston@xxxxxxx>
Signed-off-by: Ben Myers <bpm@xxxxxxx>
commit fd23683c3b1ab905cba61ea2981c156f4bf52845
Author: Dave Chinner <dchinner@xxxxxxxxxx>
Date: Mon Nov 12 22:53:59 2012 +1100
xfs: growfs: use uncached buffers for new headers
When writing the new AG headers to disk, we can't attach write
verifiers because they have a dependency on the struct xfs-perag
being attached to the buffer to be fully initialised and growfs
can't fully initialise them until later in the process.
The simplest way to avoid this problem is to use uncached buffers
for writing the new headers. These buffers don't have the xfs-perag
attached to them, so it's simple to detect in the write verifier and
be able to skip the checks that need the xfs-perag.
This enables us to attach the appropriate buffer ops to the buffer
and hence calculate CRCs on the way to disk. IT also means that the
buffer is torn down immediately, and so the first access to the AG
headers will re-read the header from disk and perform full
verification of the buffer. This way we also can catch corruptions
due to problems that went undetected in growfs.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by Rich Johnston <rjohnston@xxxxxxx>
Signed-off-by: Ben Myers <bpm@xxxxxxx>
commit b64f3a390d3477517cbff7d613e551705540769b
Author: Dave Chinner <dchinner@xxxxxxxxxx>
Date: Tue Nov 13 16:40:27 2012 -0600
xfs: use btree block initialisation functions in growfs
Factor xfs_btree_init_block() to be independent of the btree cursor,
and use the function to initialise btree blocks in the growfs code.
This makes adding support for different format btree blocks simple.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by Rich Johnston <rjohnston@xxxxxxx>
Signed-off-by: Ben Myers <bpm@xxxxxxx>
-----------------------------------------------------------------------
Summary of changes:
fs/xfs/xfs_btree.c | 33 ++++++++++-----
fs/xfs/xfs_btree.h | 11 +++++
fs/xfs/xfs_fsops.c | 113 +++++++++++++++++++++++++++++++++-------------------
3 files changed, 106 insertions(+), 51 deletions(-)
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