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[PATCH 0/9 v3] xfs_db, xfs_repair: improve CRC error detection

To: xfs@xxxxxxxxxxx
Subject: [PATCH 0/9 v3] xfs_db, xfs_repair: improve CRC error detection
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Tue, 29 Apr 2014 07:04:50 +1000
Delivered-to: xfs@xxxxxxxxxxx
Hi folks,

This is the third version of the patchset originally posted here:

http://oss.sgi.com/archives/xfs/2014-04/msg00374.html

This version corrects the issues that Christoph commented on in the
second version.

Version 3:
- factored out libxfs_readbuf_verify()
- LIBXFS_B_UNCHECKED flag setting/clearing cleaned up
- cleaned up dirty checks on AG header scan
- cleaned up error path goto stack on AG header scan
- added no_modify check to remote symlink buffer bad CRC rewrite.

Version 2:
- move LIBXFS_B_UNCHECKED to the correct patch (patch 1)
- set_cur_iotype assumes a valid type (patch 2)
- comments added to explain the way LIBXFS_B_UNCHECKED and dirty
  buffers are supposed to interact (patch 3)
- fixed comment flow and added separate "crc_error" return variable
  to dir_read_buf() (patch 4)
- reworked CRC error handling of AG headers (patch 5)
- readded missing dirty/no_modify assert (patch 6)
- fixed typos (patch 8)
- fixed "repair" variable initialisation flow (patch 9)
- fixed dirty buffer accounting on the cursor to dirty the correct
  buffer on CRC errors, added some clarifying comments (patch 9)

Comments and testing welcome!

-Dave.

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