From 360da90029196c9449bc61e5a07ce8404e4cba57 Mon Sep 17 00:00:00 2001 From: OGAWA Hirofumi Date: Thu, 16 Oct 2008 07:50:28 +0900 Subject: [PATCH] [PATCH vfs-2.6 3/6] vfs: add __d_instantiate() helper This adds __d_instantiate() for users which is already taking dcache_lock, and replace with it. The part of d_add_ci() isn't equivalent. But it should be needed fsnotify_d_instantiate() actually, because the path is to add the inode to negative dentry. fsnotify_d_instantiate() should be called after change from negative to positive. Signed-off-by: OGAWA Hirofumi --- fs/dcache.c | 31 ++++++++++++++++--------------- 1 file changed, 16 insertions(+), 15 deletions(-) diff --git a/fs/dcache.c b/fs/dcache.c index 64024005da43..5a24cee6b76a 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -981,6 +981,15 @@ struct dentry *d_alloc_name(struct dentry *parent, const char *name) return d_alloc(parent, &q); } +/* the caller must hold dcache_lock */ +static void __d_instantiate(struct dentry *dentry, struct inode *inode) +{ + if (inode) + list_add(&dentry->d_alias, &inode->i_dentry); + dentry->d_inode = inode; + fsnotify_d_instantiate(dentry, inode); +} + /** * d_instantiate - fill in inode information for a dentry * @entry: dentry to complete @@ -1000,10 +1009,7 @@ void d_instantiate(struct dentry *entry, struct inode * inode) { BUG_ON(!list_empty(&entry->d_alias)); spin_lock(&dcache_lock); - if (inode) - list_add(&entry->d_alias, &inode->i_dentry); - entry->d_inode = inode; - fsnotify_d_instantiate(entry, inode); + __d_instantiate(entry, inode); spin_unlock(&dcache_lock); security_d_instantiate(entry, inode); } @@ -1033,7 +1039,7 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry, unsigned int hash = entry->d_name.hash; if (!inode) { - entry->d_inode = NULL; + __d_instantiate(entry, NULL); return NULL; } @@ -1052,9 +1058,7 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry, return alias; } - list_add(&entry->d_alias, &inode->i_dentry); - entry->d_inode = inode; - fsnotify_d_instantiate(entry, inode); + __d_instantiate(entry, inode); return NULL; } @@ -1213,10 +1217,8 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry) d_move(new, dentry); iput(inode); } else { - /* d_instantiate takes dcache_lock, so we do it by hand */ - list_add(&dentry->d_alias, &inode->i_dentry); - dentry->d_inode = inode; - fsnotify_d_instantiate(dentry, inode); + /* already taking dcache_lock, so d_add() by hand */ + __d_instantiate(dentry, inode); spin_unlock(&dcache_lock); security_d_instantiate(dentry, inode); d_rehash(dentry); @@ -1299,8 +1301,7 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode, * d_instantiate() by hand because it takes dcache_lock which * we already hold. */ - list_add(&found->d_alias, &inode->i_dentry); - found->d_inode = inode; + __d_instantiate(found, inode); spin_unlock(&dcache_lock); security_d_instantiate(found, inode); return found; @@ -1833,7 +1834,7 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode) if (!inode) { actual = dentry; - dentry->d_inode = NULL; + __d_instantiate(dentry, NULL); goto found_lock; }