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authorAl Viro <viro@zeniv.linux.org.uk>2018-05-29 01:27:19 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2018-08-02 06:18:53 +0300
commitc971e6a006175bd0f195c6346c4e8bc4089bec00 (patch)
tree7b5a8c5ec29f2e08fe09b8e7332f2288e247f495 /fs/dcache.c
parentb0c6108ecf64fce3987f80c1610472a56d480d9a (diff)
downloadlinux-c971e6a006175bd0f195c6346c4e8bc4089bec00.tar.xz
kill d_instantiate_no_diralias()
The only user is fuse_create_new_entry(), and there it's used to mitigate the same mkdir/open-by-handle race as in nfs_mkdir(). The same solution applies - unhash the mkdir argument, then call d_splice_alias() and if that returns a reference to preexisting alias, dput() and report success. ->mkdir() argument left unhashed negative with the preexisting alias moved in the right place is just fine from the ->mkdir() callers point of view. Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c27
1 files changed, 0 insertions, 27 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 0e8e5de3c48a..a7d9e7a4c283 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1899,33 +1899,6 @@ void d_instantiate_new(struct dentry *entry, struct inode *inode)
}
EXPORT_SYMBOL(d_instantiate_new);
-/**
- * d_instantiate_no_diralias - instantiate a non-aliased dentry
- * @entry: dentry to complete
- * @inode: inode to attach to this dentry
- *
- * Fill in inode information in the entry. If a directory alias is found, then
- * return an error (and drop inode). Together with d_materialise_unique() this
- * guarantees that a directory inode may never have more than one alias.
- */
-int d_instantiate_no_diralias(struct dentry *entry, struct inode *inode)
-{
- BUG_ON(!hlist_unhashed(&entry->d_u.d_alias));
-
- security_d_instantiate(entry, inode);
- spin_lock(&inode->i_lock);
- if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) {
- spin_unlock(&inode->i_lock);
- iput(inode);
- return -EBUSY;
- }
- __d_instantiate(entry, inode);
- spin_unlock(&inode->i_lock);
-
- return 0;
-}
-EXPORT_SYMBOL(d_instantiate_no_diralias);
-
struct dentry *d_make_root(struct inode *root_inode)
{
struct dentry *res = NULL;