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nfsd: make nfs4_get_existing_delegation less confusing

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This doesn't "get" anything.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
This commit is contained in:
J. Bruce Fields 2018-02-19 11:38:33 -05:00
parent 0c911f5408
commit 68b18f5294
1 changed files with 9 additions and 14 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

23
fs/nfsd/nfs4state.c
View file

@ -900,20 +900,16 @@ void nfs4_unhash_stid(struct nfs4_stid *s)
}
/**
* nfs4_get_existing_delegation - Discover if this delegation already exists
* nfs4_delegation_exists - Discover if this delegation already exists
* @clp: a pointer to the nfs4_client we're granting a delegation to
* @fp: a pointer to the nfs4_file we're granting a delegation on
*
* Return:
* On success: NULL if an existing delegation was not found.
*
* On error: -EAGAIN if one was previously granted to this nfs4_client
* for this nfs4_file.
*
* On success: true iff an existing delegation is found
*/
static int
nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp)
static bool
nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp)
{
struct nfs4_delegation *searchdp = NULL;
struct nfs4_client *searchclp = NULL;
@ -946,15 +942,13 @@ nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp)
static int
hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp)
{
int status;
struct nfs4_client *clp = dp->dl_stid.sc_client;
lockdep_assert_held(&state_lock);
lockdep_assert_held(&fp->fi_lock);
status = nfs4_get_existing_delegation(clp, fp);
if (status)
return status;
if (nfs4_delegation_exists(clp, fp))
return -EAGAIN;
++fp->fi_delegees;
refcount_inc(&dp->dl_stid.sc_count);
dp->dl_stid.sc_type = NFS4_DELEG_STID;
@ -4391,7 +4385,7 @@ static struct nfs4_delegation *
nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
{
int status;
int status = 0;
struct nfs4_delegation *dp;
if (fp->fi_had_conflict)
@ -4399,7 +4393,8 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
spin_lock(&state_lock);
spin_lock(&fp->fi_lock);
status = nfs4_get_existing_delegation(clp, fp);
if (nfs4_delegation_exists(clp, fp))
status = -EAGAIN;
spin_unlock(&fp->fi_lock);
spin_unlock(&state_lock);