NFSv4.1: Fix bulk recall and destroy of layouts

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The current code in pnfs_destroy_all_layouts() assumes that removing
the layout from the server->layouts list is sufficient to make it
invisible to other processes. This ignores the fact that most
users access the layout through the nfs_inode->layout...
There is further breakage due to lack of reference counting of the
layouts, meaning that the whole thing Oopses at the drop of a hat.

The code in initiate_bulk_draining() is almost correct, and can be
used as a model for pnfs_destroy_all_layouts(), so move that
code to pnfs.c, and refactor the code to allow us to choose between
a single filesystem bulk recall, and a recall of all layouts.
Also note that initiate_bulk_draining() currently calls iput() while
holding locks. Fix that too.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org

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This commit is contained in:

Trond Myklebust 2013-02-12 09:48:42 -05:00

parent c8da19b986

commit fd9a8d7160

3 changed files with 144 additions and 74 deletions

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61

fs/nfs/callback_proc.c

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154

fs/nfs/pnfs.c

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7

fs/nfs/pnfs.h

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