Matthew Ahrens c6f6767eea OpenZFS 8377 - Panic in bookmark deletion
Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov>

The problem is that when dsl_bookmark_destroy_check() is
executed from open context (the pre-check), it fills in
dbda_success based on the existence of the bookmark. But
the bookmark (or containing filesystem as in this case)
can be destroyed before we get to syncing context. When
we re-run dsl_bookmark_destroy_check() in syncing context,
it will not add the deleted bookmark to dbda_success,
intending for dsl_bookmark_destroy_sync() to not process
it. But because the bookmark is still in dbda_success from
the open-context call, we do try to destroy it.
The fix is that dsl_bookmark_destroy_check() should not
modify dbda_success when called from open context.

OpenZFS-issue: https://www.illumos.org/issues/8377
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/b0b6fe3
Closes #6286
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ZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the Illumos community.

ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers. And it's native!

Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

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