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vfs: do_last(): common slow lookup
Make the slow lookup part of O_CREAT and non-O_CREAT opens common. This allows atomic_open to be hooked into the slow lookup part. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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parent
b6183df7b2
commit
7157486541
27
fs/namei.c
27
fs/namei.c
@ -2250,30 +2250,13 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
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symlink_ok = 1;
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/* we _can_ be in RCU mode here */
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error = lookup_fast(nd, &nd->last, path, &inode);
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if (unlikely(error)) {
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if (error < 0)
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goto exit;
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if (likely(!error))
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goto finish_lookup;
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BUG_ON(nd->inode != dir->d_inode);
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if (error < 0)
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goto exit;
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mutex_lock(&dir->d_inode->i_mutex);
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dentry = __lookup_hash(&nd->last, dir, nd);
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mutex_unlock(&dir->d_inode->i_mutex);
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error = PTR_ERR(dentry);
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if (IS_ERR(dentry))
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goto exit;
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path->mnt = nd->path.mnt;
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path->dentry = dentry;
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error = follow_managed(path, nd->flags);
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if (unlikely(error < 0))
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goto exit_dput;
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if (error)
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nd->flags |= LOOKUP_JUMPED;
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inode = path->dentry->d_inode;
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}
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goto finish_lookup;
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BUG_ON(nd->inode != dir->d_inode);
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} else {
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/* create side of things */
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/*
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