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| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-06-28 11:47:32 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-07-24 16:36:29 -0400 |
| commit | 285b102d3b745f3c2c110c9c327741d87e64aacc (patch) | |
| tree | c0d13e12f96b7730a1db2633f8e3743fbc267ade /fs/dcache.c | |
| parent | 17648b871d3cecf310f55ce8c6ce5821d135f6ec (diff) | |
| download | lwn-285b102d3b745f3c2c110c9c327741d87e64aacc.tar.gz lwn-285b102d3b745f3c2c110c9c327741d87e64aacc.zip | |
vfs: new d_init method
Allow filesystem to initialize dentry at allocation time.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 11 |
1 files changed, 11 insertions, 0 deletions
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; |