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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-08 16:49:21 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-09 19:23:45 -0500 |
| commit | adc0e91ab142abe93f5b0d7980ada8a7676231fe (patch) | |
| tree | 27ee89f960b7e2d6cd5179d914bc252324122c26 | |
| parent | b48f03b319ba78f3abf9a7044d1f436d8d90f4f9 (diff) | |
| download | linux-kconfig-adc0e91ab142abe93f5b0d7980ada8a7676231fe.tar.gz | |
vfs: new helper - d_make_root()
d_alloc_root() with iput() in case of allocation failure...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/dcache.c | 17 | ||||
| -rw-r--r-- | include/linux/dcache.h | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index b209d73f9a984d..3c6d3113a255c7 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1440,6 +1440,23 @@ struct dentry * d_alloc_root(struct inode * root_inode) } EXPORT_SYMBOL(d_alloc_root); +struct dentry *d_make_root(struct inode *root_inode) +{ + struct dentry *res = NULL; + + if (root_inode) { + static const struct qstr name = { .name = "/", .len = 1 }; + + res = __d_alloc(root_inode->i_sb, &name); + if (res) + d_instantiate(res, root_inode); + else + iput(root_inode); + } + return res; +} +EXPORT_SYMBOL(d_make_root); + static struct dentry * __d_find_any_alias(struct inode *inode) { struct dentry *alias; diff --git a/include/linux/dcache.h b/include/linux/dcache.h index ed9f74f6c519a1..a47bda5f76db12 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -249,6 +249,7 @@ extern int d_invalidate(struct dentry *); /* only used at mount-time */ extern struct dentry * d_alloc_root(struct inode *); +extern struct dentry * d_make_root(struct inode *); /* <clickety>-<click> the ramfs-type tree */ extern void d_genocide(struct dentry *); |