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[PATCH vfs-2.6 3/6] vfs: add __d_instantiate() helper

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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>
This commit is contained in:
OGAWA Hirofumi 2008-10-16 07:50:28 +09:00 committed by Al Viro
parent e2761a1167
commit 360da90029
1 changed files with 16 additions and 15 deletions
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31
fs/dcache.c
View file

@ -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;
}