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c18679ebd8
For the following items, key->objectid is inode number: - DIR_ITEM - DIR_INDEX - XATTR_ITEM - EXTENT_DATA - INODE_REF So in the subvolume tree, such items must have its previous item share the same objectid, e.g.: (257 INODE_ITEM 0) (257 DIR_INDEX xxx) (257 DIR_ITEM xxx) (258 INODE_ITEM 0) (258 INODE_REF 0) (258 XATTR_ITEM 0) (258 EXTENT_DATA 0) But if we have the following sequence, then there is definitely something wrong, normally some INODE_ITEM is missing, like: (257 INODE_ITEM 0) (257 DIR_INDEX xxx) (257 DIR_ITEM xxx) (258 XATTR_ITEM 0) <<< objecitd suddenly changed to 258 (258 EXTENT_DATA 0) So just by checking the previous key for above inode based key types, we can detect a missing inode item. For INODE_REF key type, the check will be added along with INODE_REF checker. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.