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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2008-10-16 07:50:28 +0900
committerAl Viro <viro@zeniv.linux.org.uk>2008-10-23 05:13:17 -0400
commit360da90029196c9449bc61e5a07ce8404e4cba57 (patch)
tree7bca57f11b2022633f5c49ec9a1bca9d2d4d1b1a
parente2761a1167633ed943fea29002f990194923d060 (diff)
downloadlinux-360da90029196c9449bc61e5a07ce8404e4cba57.tar.bz2
[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 <hirofumi@mail.parknet.co.jp>
-rw-r--r--fs/dcache.c31
1 files 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;
}