From 285b102d3b745f3c2c110c9c327741d87e64aacc Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Tue, 28 Jun 2016 11:47:32 +0200 Subject: vfs: new d_init method Allow filesystem to initialize dentry at allocation time. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro --- fs/dcache.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'fs/dcache.c') diff --git a/fs/dcache.c b/fs/dcache.c index d5beef01cdfc..6d60a764c848 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1569,6 +1569,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name) { struct dentry *dentry; char *dname; + int err; dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL); if (!dentry) @@ -1627,6 +1628,16 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name) INIT_LIST_HEAD(&dentry->d_child); d_set_d_op(dentry, dentry->d_sb->s_d_op); + if (dentry->d_op && dentry->d_op->d_init) { + err = dentry->d_op->d_init(dentry); + if (err) { + if (dname_external(dentry)) + kfree(external_name(dentry)); + kmem_cache_free(dentry_cache, dentry); + return NULL; + } + } + this_cpu_inc(nr_dentry); return dentry; -- cgit v1.2.3-59-g8ed1b