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Bug #5692

closed

expose the number of hole blocks in a file

Added by Matthew Ahrens over 7 years ago. Updated about 7 years ago.

Status:
Closed
Priority:
Normal
Category:
zfs - Zettabyte File System
Start date:
2015-03-08
Due date:
% Done:

100%

Estimated time:
Difficulty:
Medium
Tags:
needs-triage
Gerrit CR:

Description

We would like to expose the number of hole (sparse) blocks in a file. This can be useful to for example if you want to fill in the holes with some data; knowing the number of holes in advances allows you to report progress on hole filling. We could use SEEK_HOLE to do that but it would be O(n) where n is the number of holes present in the file.

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