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nfs41: wait for LAYOUTRETURN before retrying LAYOUTGET

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Also take care to stop waiting if someone clears retry bit.

Signed-off-by: Peng Tao <tao.peng@primarydata.com>
This commit is contained in:
Peng Tao
2014-12-01 08:22:23 +08:00
committed by Tom Haynes
parent 012fa16dca
commit aa8a45ee97
3 changed files with 45 additions and 3 deletions
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5
fs/nfs/pnfs.h
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@@ -359,8 +359,11 @@ static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo)
static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo)
{
if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags))
if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) {
atomic_dec(&lo->plh_refcount);
/* wake up waiters for LAYOUTRETURN as that is not needed */
wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
}
}
static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo)