[PATCH v3 21/38] nfsd: allow nfsd to get a dir lease with an ignore mask

[Jeff Layton]

When requesting a directory lease, enable the FL_IGN_DIR_* bits that
correspond to the requested notification types.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/nfsd/nfs4state.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d1d586ec0e4e2bef908dc0671c34edab9cad5ba2..e219556e0959dbf0a8147d5edbb725da125a978f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5937,14 +5937,30 @@ static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
 	return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
 }
 
-static struct file_lease *nfs4_alloc_init_lease(struct nfs4_delegation *dp)
+static unsigned int
+nfsd_notify_to_ignore(u32 notify)
+{
+	unsigned int mask = 0;
+
+	if (notify & BIT(NOTIFY4_REMOVE_ENTRY))
+		mask |= FL_IGN_DIR_DELETE;
+	if (notify & BIT(NOTIFY4_ADD_ENTRY))
+		mask |= FL_IGN_DIR_CREATE;
+	if (notify & BIT(NOTIFY4_RENAME_ENTRY))
+		mask |= FL_IGN_DIR_RENAME;
+
+	return mask;
+}
+
+static struct file_lease *nfs4_alloc_init_lease(struct nfs4_delegation *dp, u32 notify)
 {
 	struct file_lease *fl;
 
 	fl = locks_alloc_lease();
 	if (!fl)
 		return NULL;
-	fl->c.flc_flags = FL_DELEG;
+
+	fl->c.flc_flags = FL_DELEG | nfsd_notify_to_ignore(notify);
 	fl->c.flc_type = deleg_is_read(dp->dl_type) ? F_RDLCK : F_WRLCK;
 	fl->c.flc_owner = (fl_owner_t)dp;
 	fl->c.flc_pid = current->tgid;
@@ -6161,7 +6177,7 @@ nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
 	if (!dp)
 		goto out_delegees;
 
-	fl = nfs4_alloc_init_lease(dp);
+	fl = nfs4_alloc_init_lease(dp, 0);
 	if (!fl)
 		goto out_clnt_odstate;
 
@@ -9468,12 +9484,11 @@ nfsd_get_dir_deleg(struct nfsd4_compound_state *cstate,
 	if (!dp)
 		goto out_delegees;
 
-	fl = nfs4_alloc_init_lease(dp);
+	fl = nfs4_alloc_init_lease(dp, gdd->gddr_notification[0]);
 	if (!fl)
 		goto out_put_stid;
 
-	status = kernel_setlease(nf->nf_file,
-				 fl->c.flc_type, &fl, NULL);
+	status = kernel_setlease(nf->nf_file, fl->c.flc_type, &fl, NULL);
 	if (fl)
 		locks_free_lease(fl);
 	if (status)

-- 
2.51.0