lvmetad: refactor and document

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update_metadata and pv_found update the cached metadata;
these are both reworked to improve the code, organize it
by each possible state and transition, make it much more
clear what's changing, add more error checking and
handling, and add comments.

The state and content of the cache (hash tables) does not
change (apart from some things that didn't work before),
and the communication to/from commands does not change.
The implementation and organization of the code making
the state changes does change significantly.

One detail related to the content of the cache does change:
different hash tables do not reference the same memory any more;
the target values in each hash table are allocated and freed
individually.

...

This commit is contained in:

David Teigland 2015-09-18 09:42:38 -05:00

parent 4b47ee5296

commit 4e6377f5ba

1 changed files with 1595 additions and 310 deletions

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daemons/lvmetad/lvmetad-core.c

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