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nfsd: Add fine grained protection for the nfs4_file->fi_stateids list

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Access to this list is currently serialized by the client_mutex. Add
finer grained locking around this list in preparation for its removal.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust
2014-07-10 14:07:25 -04:00
committed by J. Bruce Fields
parent d6c249b4d4
commit 1d31a2531a
2 changed files with 19 additions and 3 deletions
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fs/nfsd/state.h
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@@ -377,6 +377,7 @@ static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
/* nfs4_file: a file opened by some number of (open) nfs4_stateowners. */
struct nfs4_file {
atomic_t fi_ref;
spinlock_t fi_lock;
struct hlist_node fi_hash; /* hash by "struct inode *" */
struct list_head fi_stateids;
struct list_head fi_delegations;