From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f176.google.com (mail-yb1-f176.google.com [209.85.219.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 815D035335B for ; Tue, 26 Aug 2025 15:41:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756222868; cv=none; b=bv0W02UMt6W0Ay3J0B9TYZ+hIKh4Zb3h+R7ejZPI9qW/xksgK2R+lAxVznCMEA2A+ljoM70QoAuiFu/FnkM3XZlKNLdK4FdTjW8GvZ8iCRuz9SlqRrtB2AUvp9U6WYzbesdTb/fEUm/YvmUcRyjmh9CrD73d8Wuyew/VWg60NAc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756222868; c=relaxed/simple; bh=i08d7EU1qtP0hre72cGWsXMuWQRhkvfGuBLQ0ClvHDw=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TXoN/p/flsmCe5c08WUyIcftKJQK/a0phAwuwvf7rj5G6v63cxCLeB32TyIXWxTy8D7gg9t3BBV7CuHjmCoSzvHzHs5lMiaxhupc7GYk71jCsyzeNeJR0VyFWgMofiY+7VI928fmsxfmm7pfDqDJwWtjoWzx+me8zuQbOjEbwao= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=toxicpanda.com; spf=none smtp.mailfrom=toxicpanda.com; dkim=pass (2048-bit key) header.d=toxicpanda-com.20230601.gappssmtp.com header.i=@toxicpanda-com.20230601.gappssmtp.com header.b=ZOPAyxj3; arc=none smtp.client-ip=209.85.219.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=toxicpanda.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=toxicpanda.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=toxicpanda-com.20230601.gappssmtp.com header.i=@toxicpanda-com.20230601.gappssmtp.com header.b="ZOPAyxj3" Received: by mail-yb1-f176.google.com with SMTP id 3f1490d57ef6-e95230750ceso16353276.0 for ; Tue, 26 Aug 2025 08:41:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20230601.gappssmtp.com; s=20230601; t=1756222862; x=1756827662; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=QUdrFFBfeSCCz5BvIAzgXKAAiu4bIaqDFMnpkxh49FM=; b=ZOPAyxj3H6QKMxpdjneOBvd604BCzKSOqEUrDEkuibQqucMKP9vI+RiEEaloB+3yLn fFKIqefV7NLTDgVp2+i3z9YuuuiDn+PGaaWHEuntkNyBfFTtVxPR8oamlwxAuBixwbaI If7vDO/qk6QMlqy1nZ93vsC9msRnfg8STQqshr4RT30PcIduDPSX/fMBctVY+qMDdr2n QrHZlIcec4ejDB3gGcXYNDc3G1UqUttm9obOa0wg6ptVYkJhu4LAK9/YYKu/yPphSAEP aP2gVldwYel/jg72OwRShcEd3qJgz/8VLBEB0wg9G86Syr6QkkxIt8/koPtlRoyxpeCH R/rg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756222862; x=1756827662; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=QUdrFFBfeSCCz5BvIAzgXKAAiu4bIaqDFMnpkxh49FM=; b=l60ztvZzc1D5oBk1XvL4QCSPEodUjx28+BD8cKb/h6VKChDbj8RmZFQTIEUnlz9mUF PaKK6uBkbDFO70WGCwtv8QncFRhfBnTtNKaPkGMLTi2Z4I3m3SRHPW2xK05qRxzw557C 6g0XqgHFw9QfN9zQDPgfwZxM0auUk53lml9cfpJU/qcUed08BztYOW2WfKLxDWNv+1hV 8tbueAtOvC7wUAl6Hr9Hz4EBXXNnmirIvelPZ2yvFRQMUBLbS9DgUDrHfdm6eTF2Inbg 6d+HYjMWVeSJwQAXwS4OqjqDffbc65AALZuICeYTOyYFTKZCN10ZpDS2bDLa8saOuB93 dMog== X-Forwarded-Encrypted: i=1; AJvYcCUUI3iYdLDkoa6LQUqxqhIYPscAksFX40QGne2T6kq2ZqsNrWCwT6BhaYLH+vtS/b+I57MaoLGwyQ1wTA==@vger.kernel.org X-Gm-Message-State: AOJu0YyQUDOyYYEecWEIFp+I3lF3Bgd+5TgJuKRwI+laEK0B2CHR70dk S0dRKRLx506JWqLGK89TsFWgEciFB6jTIBLedS/bLeOsWrtGzqbFg8IYecQL/nkBWCb2UrRM9w7 66UOX X-Gm-Gg: ASbGnct9QFeomHhN6UceeeGBWfg42Dfo5N8y9RNhGkwX8iN+EwsWqFik/baMW6qQdZ8 N6/5EQX9UX10qLl1ekpyZA9w6h0KIHpolvw0KVxg+t3NCBOrWDSTCZrbPkqtpWIhf2l4lpzXdRA HsjoQInVRFfW0FMfnt9yBvCgS1oPTBe+z2mdCRFKoHouaZTsZCR8JOLKFtl1Iv42xRhwCxeVGwe lLdCobFyvHYfscJELKrKllQOGqCJ7YwcHZ3l8uqEbIv0v1apS92okqQuwq1tc+Mzl7PDeGBLQY+ 2bLy7RWw8pxF0qumVJiiG7IRZlZHcUO6SdyilcNSX09rho22Mxc+N7mtHZUuZfwd6ErlgjCnfYq 2yxhAoIen+sB1rCGsk7TjDlU8nxgHu/RTgSSqqmEQOb8BiUTTivqc/L1TyJs= X-Google-Smtp-Source: AGHT+IF7RynrrWFe9fbQoevH3erjAdy+diX1JnF6ZTRRIvx21HIrszb+j08T7FJ+0UEw8lO9Zl2Jew== X-Received: by 2002:a05:6902:1004:b0:e93:4b37:f0a5 with SMTP id 3f1490d57ef6-e96e4792411mr2039154276.7.1756222861630; Tue, 26 Aug 2025 08:41:01 -0700 (PDT) Received: from localhost (syn-076-182-020-124.res.spectrum.com. [76.182.20.124]) by smtp.gmail.com with ESMTPSA id 3f1490d57ef6-e96e0567840sm603896276.4.2025.08.26.08.41.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Aug 2025 08:41:00 -0700 (PDT) From: Josef Bacik To: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, kernel-team@fb.com, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, brauner@kernel.org, viro@ZenIV.linux.org.uk, amir73il@gmail.com Subject: [PATCH v2 09/54] fs: hold an i_obj_count reference while on the hashtable Date: Tue, 26 Aug 2025 11:39:09 -0400 Message-ID: <89e15be97f804cb135ff942eff556d1f271f2f16.1756222465.git.josef@toxicpanda.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit While the inode is on the hashtable we need to hold a reference to the object itself. Signed-off-by: Josef Bacik --- fs/inode.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/inode.c b/fs/inode.c index d426f54c05d9..0c063227d355 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -667,6 +667,7 @@ void __insert_inode_hash(struct inode *inode, unsigned long hashval) spin_lock(&inode_hash_lock); spin_lock(&inode->i_lock); + iobj_get(inode); hlist_add_head_rcu(&inode->i_hash, b); spin_unlock(&inode->i_lock); spin_unlock(&inode_hash_lock); @@ -681,11 +682,16 @@ EXPORT_SYMBOL(__insert_inode_hash); */ void __remove_inode_hash(struct inode *inode) { + bool putref; + spin_lock(&inode_hash_lock); spin_lock(&inode->i_lock); + putref = !hlist_unhashed(&inode->i_hash) && !hlist_fake(&inode->i_hash); hlist_del_init_rcu(&inode->i_hash); spin_unlock(&inode->i_lock); spin_unlock(&inode_hash_lock); + if (putref) + iobj_put(inode); } EXPORT_SYMBOL(__remove_inode_hash); @@ -1314,6 +1320,7 @@ struct inode *inode_insert5(struct inode *inode, unsigned long hashval, * caller is responsible for filling in the contents */ spin_lock(&inode->i_lock); + iobj_get(inode); inode->i_state |= I_NEW; hlist_add_head_rcu(&inode->i_hash, head); spin_unlock(&inode->i_lock); @@ -1451,6 +1458,7 @@ struct inode *iget_locked(struct super_block *sb, unsigned long ino) if (!old) { inode->i_ino = ino; spin_lock(&inode->i_lock); + iobj_get(inode); inode->i_state = I_NEW; hlist_add_head_rcu(&inode->i_hash, head); spin_unlock(&inode->i_lock); @@ -1803,6 +1811,7 @@ int insert_inode_locked(struct inode *inode) } if (likely(!old)) { spin_lock(&inode->i_lock); + iobj_get(inode); inode->i_state |= I_NEW | I_CREATING; hlist_add_head_rcu(&inode->i_hash, head); spin_unlock(&inode->i_lock); -- 2.49.0