merge: aufs

sfjro/aufs4-standalone@ccb1589
Signed-off-by: Robert Nelson <[email protected]>

Documentation/ABI/testing/debugfs-aufs

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+What: /debug/aufs/si_<id>/
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ Under /debug/aufs, a directory named si_<id> is created
+ per aufs mount, where <id> is a unique id generated
+ internally.
+
+What: /debug/aufs/si_<id>/plink
+Date: Apr 2013
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It has three lines and shows the information about the
+ pseudo-link. The first line is a single number
+ representing a number of buckets. The second line is a
+ number of pseudo-links per buckets (separated by a
+ blank). The last line is a single number representing a
+ total number of psedo-links.
+ When the aufs mount option 'noplink' is specified, it
+ will show "1\n0\n0\n".
+
+What: /debug/aufs/si_<id>/xib
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It shows the consumed blocks by xib (External Inode Number
+ Bitmap), its block size and file size.
+ When the aufs mount option 'noxino' is specified, it
+ will be empty. About XINO files, see the aufs manual.
+
+What: /debug/aufs/si_<id>/xi0, xi1 ... xiN and xiN-N
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It shows the consumed blocks by xino (External Inode Number
+ Translation Table), its link count, block size and file
+ size.
+ Due to the file size limit, there may exist multiple
+ xino files per branch. In this case, "-N" is added to
+ the filename and it corresponds to the index of the
+ internal xino array. "-0" is omitted.
+ When the aufs mount option 'noxino' is specified, Those
+ entries won't exist. About XINO files, see the aufs
+ manual.
+
+What: /debug/aufs/si_<id>/xigen
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It shows the consumed blocks by xigen (External Inode
+ Generation Table), its block size and file size.
+ If CONFIG_AUFS_EXPORT is disabled, this entry will not
+ be created.
+ When the aufs mount option 'noxino' is specified, it
+ will be empty. About XINO files, see the aufs manual.

Documentation/ABI/testing/sysfs-aufs

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+What: /sys/fs/aufs/si_<id>/
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ Under /sys/fs/aufs, a directory named si_<id> is created
+ per aufs mount, where <id> is a unique id generated
+ internally.
+
+What: /sys/fs/aufs/si_<id>/br0, br1 ... brN
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It shows the abolute path of a member directory (which
+ is called branch) in aufs, and its permission.
+
+What: /sys/fs/aufs/si_<id>/brid0, brid1 ... bridN
+Date: July 2013
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It shows the id of a member directory (which is called
+ branch) in aufs.
+
+What: /sys/fs/aufs/si_<id>/xi_path
+Date: March 2009
+Contact: J. R. Okajima <[email protected]>
+Description:
+ It shows the abolute path of XINO (External Inode Number
+ Bitmap, Translation Table and Generation Table) file
+ even if it is the default path.
+ When the aufs mount option 'noxino' is specified, it
+ will be empty. About XINO files, see the aufs manual.