Commit 15bb3afe authored by Peng Tao's avatar Peng Tao Committed by Trond Myklebust

nfs4: add nfs4_check_delegation

Signed-off-by: default avatarPeng Tao <tao.peng@primarydata.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 0b0bc6ea
......@@ -41,14 +41,8 @@ void nfs_mark_delegation_referenced(struct nfs_delegation *delegation)
set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags);
}
/**
* nfs_have_delegation - check if inode has a delegation
* @inode: inode to check
* @flags: delegation types to check for
*
* Returns one if inode has the indicated delegation, otherwise zero.
*/
int nfs4_have_delegation(struct inode *inode, fmode_t flags)
static int
nfs4_do_check_delegation(struct inode *inode, fmode_t flags, bool mark)
{
struct nfs_delegation *delegation;
int ret = 0;
......@@ -58,12 +52,34 @@ int nfs4_have_delegation(struct inode *inode, fmode_t flags)
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (delegation != NULL && (delegation->type & flags) == flags &&
!test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) {
nfs_mark_delegation_referenced(delegation);
if (mark)
nfs_mark_delegation_referenced(delegation);
ret = 1;
}
rcu_read_unlock();
return ret;
}
/**
* nfs_have_delegation - check if inode has a delegation, mark it
* NFS_DELEGATION_REFERENCED if there is one.
* @inode: inode to check
* @flags: delegation types to check for
*
* Returns one if inode has the indicated delegation, otherwise zero.
*/
int nfs4_have_delegation(struct inode *inode, fmode_t flags)
{
return nfs4_do_check_delegation(inode, flags, true);
}
/*
* nfs4_check_delegation - check if inode has a delegation, do not mark
* NFS_DELEGATION_REFERENCED if it has one.
*/
int nfs4_check_delegation(struct inode *inode, fmode_t flags)
{
return nfs4_do_check_delegation(inode, flags, false);
}
static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
{
......
......@@ -59,6 +59,7 @@ bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode, fmode_
void nfs_mark_delegation_referenced(struct nfs_delegation *delegation);
int nfs4_have_delegation(struct inode *inode, fmode_t flags);
int nfs4_check_delegation(struct inode *inode, fmode_t flags);
#endif
......
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