NFS/flexfiles: Send LAYOUTERROR when failing over mirrored reads

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When a read to the preferred mirror returns an error, the flexfiles
driver records the error in the inode list and currently marks the
layout for return before failing over the attempted read to the next
mirror.
What we actually want to do is fire off a LAYOUTERROR to notify the
MDS that there is an issue with the preferred mirror, then we fail
over. Only once we've failed to read from all mirrors should we
return the layout.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

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Trond Myklebust 2019-02-10 22:38:43 -05:00

parent 3eb86093ea

commit f0922a6c0c

3 changed files with 57 additions and 6 deletions

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fs/nfs/flexfilelayout/flexfilelayout.c

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fs/nfs/flexfilelayout/flexfilelayout.h

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fs/nfs/flexfilelayout/flexfilelayoutdev.c

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