From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9D661368970; Thu, 2 Apr 2026 19:23:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775157796; cv=none; b=B1T+uy2nvtI+JlgLP3Ege2lTggPe1ZSfskJI2Q0Gxkyb1dh+pY5m1KKMeg55rvqmmfYdyV8cXoiBtkp+w4TVtW2KjeJcc5Z4CBVxb5I27CDbAJvIGPBxEZMYU8/NmQPLu0DEoND5YA7JL7IupXK0f7O2uyuc2aDEOuPliONzLQQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775157796; c=relaxed/simple; bh=f2+Ub+/XHAQtGZGd0USzUQOvu7S30GC2CkbVfIlj3UQ=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=AmDDHp6vfctAadElHgLdnAI1pujEI96e6sJuuox8xYOtBcFHDZYfd1AixtqJQ2R9XGvk7vYLX8dySFjvPnuaLsvIVa3YpmAIEeyd07vmxCZgdmGIodu+HlPtnsnxVpokc67jJzw6oHPH3SjBloao9ha6NyMAIciOpA59G3TiEiw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Z9BRkx5w; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Z9BRkx5w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38166C116C6; Thu, 2 Apr 2026 19:23:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775157796; bh=f2+Ub+/XHAQtGZGd0USzUQOvu7S30GC2CkbVfIlj3UQ=; h=From:Subject:Date:To:Cc:From; b=Z9BRkx5wW2WycbpfRmslmBdGpLtpYUtGN850Ju9a/SXZcSz1Ivw+U6OnJGV3QuZyB 3II+pYcl+mgCliGtGE7PyXCDIsUjr5pPyoGr5z2OrY2Tn7hGiCorKNOniWrGqWYwvj 1L0WD0FAVHKhwryo6GBmkHJyBRg99Zo5myAPcbmEaaHtozVppm4y1tz2lihov3XGrD vVRnan3MZrOL1vLsrlCikTcbKHiVTwS/vtr8M/9i8Z/aUGo+9WJQauCsZ/cXVX1ppS 0cBfTLxdYB5CqQkdXgroZAwG6TbPVeLbfwUcFLm7YdKzeH72b/oWM45zpHqFaFNy5q 3efx6ngKs8bEA== From: Jeff Layton Subject: [PATCH v7 0/2] firmware_loader: allow firmware_class.path to take multiple paths Date: Thu, 02 Apr 2026 15:23:07 -0400 Message-Id: <20260402-fw-path-v7-0-5b7e9c41a8c0@kernel.org> Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/3XO3U7DMAwF4FeZck2QnTg/3RXvgbhIWmeNQO2UT gU09d1JJ0GHql0ey9+xr2LiknkSx8NVFJ7zlMehBvd0EG0fhhPL3NUsFCgLGp1Mn/IcLr0M0FC rQZkmGFG3z4VT/ro1vb7V3OfpMpbvW/GM6/S3w/91zChROu+pa2Ky6NPLO5eBP57HchJryaweQ FWhDwiWY4McaQf1A6grDA4wgI9t/X4H6Q4q2CCtrxpyrBJ0rd1fNPdQb9BIkOx9VImRTNI7aDd IgBu0FRJHdkCEXjf/4LIsP1/Mu628AQAA X-Change-ID: 20260317-fw-path-a094c30259a5 To: Luis Chamberlain , Russ Weight , Danilo Krummrich , Greg Kroah-Hartman , "Rafael J. Wysocki" , Shuah Khan Cc: Michal Grzedzicki , driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2294; i=jlayton@kernel.org; h=from:subject:message-id; bh=f2+Ub+/XHAQtGZGd0USzUQOvu7S30GC2CkbVfIlj3UQ=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBpzsIiE5On+4gj28VEsMqCeO77m0RnBuSYxC78I 7ibSZJlfyiJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCac7CIgAKCRAADmhBGVaC FajcEADGKLXgX1KpHn49SpZP07SOLmRO+8g1n8gLgCpDDVIWVu+iXUsGQXMutBaqMhPGsTI0NPF YX95lBIagY+RsoM5KnzveRv2HJlm0BFVAJZn/Dvbxf2D1L1EFqugWObRB9bd5Ct3oi0Pqbe7Dyw pKJoB0fUmTsd47bGfC4H60l7wVKTt5jYu78bd2hlHbbnUPX+Jz3JhIZd03UWY2poSN7/Xj3AoOP wknQYEnyI0Jzx3A5A18PjolFLiBFVNrGGNHXYfo8WvehIRX3RHWBSlFXHXII2sAx03R74X7dpAc McDwJKGApE/+c+C1JrLCZcAlbODhxu8sa8CvGUGYdxvH/GUTu4SdFHQ26RgenG16vno7zI/oMZu Rdb2qpzo9H4pcmhIIPOk0TML0L6Z+k1EZEaOb4klBX0LBJsIQXmgb6lig1tn0kV0nvyx08FXp/s 7HM5jbkG/klFsHFyuEEyk6JZulr0c9qcT4FWuuonpDJE3jHxZVNskdtbPdibJoFgI7vLx3SziZm jShvMOB+yIhZNaBOyI8oagirHvwnQb9S/O6+nT4FIRajllGUf/57pCQl4RP/7t7tVCABdduhtw0 cnA70WdcEz+m0dJlKCKVQpYqm+exxH3U6qr79EF+XQ9m4asv3RhhHMIoBmamrhP7ufUXmlySLLt /SynRMWZ6S8ft8A== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 This is something Michal had asked for last year, and I just got around to implementing. This version is mainly to address Sashiko review comments: https://sashiko.dev/#/patchset/20260401-fw-path-v6-0-4ebe70441839%40kernel.org I fixed the ones I felt were reasonable. I can explain my rationale for not bothering with the others if anyone has questions about it. Signed-off-by: Jeff Layton --- Changes in v7: - re-escape emitted paths in fw_search_get - fix potential out-of-bounds read in fw_get_filesystem_firmware() - ensure all files are cleaned up after failed selftests - Link to v6: https://lore.kernel.org/r/20260401-fw-path-v6-0-4ebe70441839@kernel.org Changes in v6: - Add fw_search_unescape() to make the search path parsing more readable - Rename search= to search_path= - Link to v5: https://lore.kernel.org/r/20260323-fw-path-v5-0-e88b2fe145f3@kernel.org Changes in v5: - Increase search= string length from 256 to 4096 - Preprocess search= path when it's set rather than on every firmware load - Add selftests for search= functionality - Link to v4: https://lore.kernel.org/r/20260320-fw-path-v4-1-7547e2f0dc64@kernel.org Changes in v4: - Move search path to new search= option that is tried after path= - Link to v3: https://lore.kernel.org/r/20260318-fw-path-v3-1-a701a08bc025@kernel.org Changes in v3: - Allow '\' to escape a literal ':' or '\' in the string - Link to v2: https://lore.kernel.org/r/20260318-fw-path-v2-1-8a106eb91eb4@kernel.org Changes in v2: - switch to using ':' as path delimiter - Link to v1: https://lore.kernel.org/r/20260318-fw-path-v1-1-7884d9bf618f@kernel.org --- Jeff Layton (2): firmware_loader: add search_path= module option for multi-path firmware lookup selftests/firmware: add search path test for firmware_class.search_path= drivers/base/firmware_loader/main.c | 305 +++++++++++++++++++------- tools/testing/selftests/firmware/Makefile | 2 +- tools/testing/selftests/firmware/fw_search.sh | 217 ++++++++++++++++++ 3 files changed, 447 insertions(+), 77 deletions(-) --- base-commit: c369299895a591d96745d6492d4888259b004a9e change-id: 20260317-fw-path-a094c30259a5 Best regards, -- Jeff Layton