[PATCH v5 05/21] nfsd: update the fsnotify mark when setting or removing a dir delegation

[Jeff Layton <jlayton@kernel.org>]

Add a new helper function that will update the mask on the nfsd_file's
fsnotify_mark to be a union of all current directory delegations on an
inode. Call that when directory delegations are added or removed.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/nfsd/nfs4state.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2a34ba457b74..efbc99f0a965 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1246,6 +1246,38 @@ static void nfsd4_finalize_deleg_timestamps(struct nfs4_delegation *dp, struct f
 	nfsd_update_cmtime_attr(f, ATTR_ATIME);
 }
 
+static void nfsd_fsnotify_recalc_mask(struct nfsd_file *nf)
+{
+	struct inode *inode = file_inode(nf->nf_file);
+	u32 lease_mask, set = 0, clear = 0;
+	struct fsnotify_mark *mark;
+
+	/* This is only needed when adding or removing dir delegs */
+	if (!S_ISDIR(inode->i_mode) || !nf->nf_mark)
+		return;
+
+	/* Set up notifications for any ignored delegation events */
+	lease_mask = inode_lease_ignore_mask(inode);
+	mark = &nf->nf_mark->nfm_mark;
+
+	if (lease_mask & FL_IGN_DIR_CREATE)
+		set |= FS_CREATE | FS_MOVED_TO;
+	else
+		clear |= FS_CREATE | FS_MOVED_TO;
+
+	if (lease_mask & FL_IGN_DIR_DELETE)
+		set |= FS_DELETE | FS_MOVED_FROM;
+	else
+		clear |= FS_DELETE | FS_MOVED_FROM;
+
+	if (lease_mask & FL_IGN_DIR_RENAME)
+		set |= FS_RENAME;
+	else
+		clear |= FS_RENAME;
+
+	fsnotify_modify_mark_mask(mark, set, clear);
+}
+
 static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp)
 {
 	struct nfs4_file *fp = dp->dl_stid.sc_file;
@@ -1255,6 +1287,7 @@ static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp)
 
 	nfsd4_finalize_deleg_timestamps(dp, nf->nf_file);
 	kernel_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp);
+	nfsd_fsnotify_recalc_mask(nf);
 	put_deleg_file(fp);
 }
 
@@ -9682,6 +9715,7 @@ nfsd_get_dir_deleg(struct nfsd4_compound_state *cstate,
 
 	if (!status) {
 		put_nfs4_file(fp);
+		nfsd_fsnotify_recalc_mask(nf);
 		return dp;
 	}
 

-- 
2.54.0