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staging: lustre: llite: use d_splice_alias for directories.

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In the Linux dcache a directory only ever has one dentry,
so d_splice_alias() can be used by ll_splice_alias() for directories.
It will find the one dentry whether it is DCACHE_DISCONNECTED or
IS_ROOT() or d_lustre_invalid().
Separating out the directories from non-directories will allow us
to simplify the non-directory code.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
NeilBrown 2018-02-13 08:30:48 +11:00 committed by Greg Kroah-Hartman
parent a22c3d41d1
commit e9d4f0b9f5
1 changed files with 7 additions and 2 deletions
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9
drivers/staging/lustre/lustre/llite/namei.c
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@ -434,7 +434,7 @@ static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
*/
struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
{
if (inode) {
if (inode && !S_ISDIR(inode->i_mode)) {
struct dentry *new = ll_find_alias(inode, de);
if (new) {
@ -445,8 +445,13 @@ struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
new, d_inode(new), d_count(new), new->d_flags);
return new;
}
d_add(de, inode);
} else {
struct dentry *new = d_splice_alias(inode, de);
if (new)
de = new;
}
d_add(de, inode);
CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
de, d_inode(de), d_count(de), de->d_flags);
return de;