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nfs41: change PNFS_LAYOUTRET_ON_SETATTR to only return on truncation to smaller size

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Both blocks layout and objects layout want to use it to avoid CB_LAYOUTRECALL
but that should only happen if client is doing truncation to a smaller size.
For other cases, we let server decide if it wants to recall client's layouts.
Change PNFS_LAYOUTRET_ON_SETATTR to follow the logic and not to send
layoutreturn unnecessarily.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Boaz Harrosh <boaz@plexistor.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Peng Tao
2014-09-12 11:04:10 +08:00
committed by Trond Myklebust
parent cb8c20fa53
commit 88ac815cdb
2 changed files with 5 additions and 2 deletions
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3
fs/nfs/pnfs.h
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@@ -69,7 +69,8 @@ enum {
};
enum layoutdriver_policy_flags {
/* Should the pNFS client commit and return the layout upon a setattr */
/* Should the pNFS client commit and return the layout upon truncate to
* a smaller size */
PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
PNFS_READ_WHOLE_PAGE = 1 << 2,