* understanding csum tree
@ 2015-11-12 14:51 Lakshmipathi.G
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From: Lakshmipathi.G @ 2015-11-12 14:51 UTC (permalink / raw)
To: linux-btrfs
Hi -
I trying to understand csum tree and its entries.
1) create a filenamed 'ab' with 100KB of data. I can see csum entry for
this:
item 0 key (EXTENT_CSUM EXTENT_CSUM 4239360) itemoff 3895 itemsize 100
2) created another named 'zb1' with 100KB of data. I can't find csum
entry for this.Looks like item-0 is extended with csum of zb1.
item 0 key (EXTENT_CSUM EXTENT_CSUM 4239360) itemoff 3795 itemsize 200
If I need to read/print only the csum of 'zb1' file - how to achieve
that? thanks!
btrfs-debug-tree output : http://pastebin.com/tzKLX2ZU
after creating zb1 file : http://pastebin.com/WzjJuzFB
Cheers,
Lakshmipathi.G
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2015-11-12 14:51 understanding csum tree Lakshmipathi.G
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