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btrfs-progs: inspect-internal: document new logical-resolve options and kernel requirements 

Document the new options requiring the V2 ioctl and the increased
default buffer size.

Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Zygo Blaxell 2019-11-26 22:55:09 -05:00 committed by David Sterba
parent 2cbddaba38
commit 3c5254b187
1 changed files with 9 additions and 2 deletions
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11
Documentation/btrfs-inspect-internal.asciidoc
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@ -125,7 +125,7 @@ at 'path', ie. all hardlinks
-v::::
verbose mode, print count of returned paths and ioctl() return value
*logical-resolve* [-Pv] [-s <bufsize>] <logical> <path>::
*logical-resolve* [-Pvo] [-s <bufsize>] <logical> <path>::
(needs root privileges)
+
resolve paths to all files at given 'logical' address in the linear filesystem space
@ -136,8 +136,15 @@ resolve paths to all files at given 'logical' address in the linear filesystem s
skip the path resolving and print the inodes instead
-v::::
verbose mode, print count of returned paths and all ioctl() return values
-o::::
ignore offsets, find all references to an extent instead of a single block.
Requires kernel support for the V2 ioctl (added in 4.15). The results might need
further processing to filter out unwanted extents by the offset that is supposed
to be obtained by other means.
-s <bufsize>::::
set internal buffer for storing the file names to 'bufsize', default is 4096, maximum 64k
set internal buffer for storing the file names to 'bufsize', default is 64k,
maximum 16m. Buffer sizes over 64K require kernel support for the V2 ioctl
(added in 4.15).
*min-dev-size* [options] <path>::
(needs root privileges)