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 00AE01EF0B0; Wed, 29 Oct 2025 01:13:07 +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=1761700388; cv=none; b=XcClI7U2jfYso77GU1fCWp4ej2i4hWMBMCl18/+8JKgzMiHBLx7sMiPptLEokX1dbRtUSM2VyO+A2WIS1QY3luMvInD0EKPffVDT+xcN9YVyjPFT+sli3uyjXMVMo/NlX1AYcIlIjzsD5ZYS8SpLv8zNEtHh/SnquUzjnDKtfeA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761700388; c=relaxed/simple; bh=AzmVo2m0Ehi9DGkm5B5ZFPlYFOTDtgfI9qCENyifMW0=; h=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=h9LdbfVYnGLMC5mPH/s0F9f1fOtnEVmAuwB7j+sDCH5DGzs9w5dhv45El5pyqeDjJRf0EN45CD0mr4ngrOZKXTr8xLQ1l+3V3DW2Zd+T2GB5xbEdNdC8+UDE3Fh/LRnOpaeSSt4Xwa2oUp+BTD+54+1zdu7BeZEOafe8A4h4QpE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tEPGK4Rg; 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="tEPGK4Rg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C9EF3C4CEE7; Wed, 29 Oct 2025 01:13:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761700387; bh=AzmVo2m0Ehi9DGkm5B5ZFPlYFOTDtgfI9qCENyifMW0=; h=Date:Subject:From:To:Cc:In-Reply-To:References:From; b=tEPGK4Rg/PueQmuCn+ilgAW2+jZ05VBFubQQOv4Dx7y7i9c/Lxc+a9KI7H5dZVq1H IUmFcmU6TOlQXgParMcTVPs548Ncy+8oqWCrILBFeBXpvFUITLHHD7M7BiDQYuxJW5 4u0qOLcTmEcSA+6VuHAPsEMWsMrsh5UTIM6pCc+pjIZEtZDUFWv4ng8idCjyX2N7f5 sBkhyN8h/kXA2oQdCiZ3fv0dwymxNAxpqimuM3mDtBeSERy3/Bdv2J5ji15CEt7ujz DVh4H0q36qXSrXB6vxwpz8weEFXnngTGs+fFnYYPQfsJZ1F2/F5lUZM7Jn+LYCyPrj 71T+e/Gv0uLug== Date: Tue, 28 Oct 2025 18:13:07 -0700 Subject: [PATCH 1/2] fuse2fs: implement freeze and shutdown requests From: "Darrick J. Wong" To: tytso@mit.edu Cc: linux-fsdevel@vger.kernel.org, joannelkoong@gmail.com, bernd@bsbernd.com, neal@gompa.dev, miklos@szeredi.hu, linux-ext4@vger.kernel.org Message-ID: <176169818017.1430244.15867634241723830969.stgit@frogsfrogsfrogs> In-Reply-To: <176169817993.1430244.1454665580135941500.stgit@frogsfrogsfrogs> References: <176169817993.1430244.1454665580135941500.stgit@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: Darrick J. Wong Handle freezing and shutting down the filesystem if requested. Signed-off-by: "Darrick J. Wong" --- fuse4fs/fuse4fs.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++ misc/fuse2fs.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 175 insertions(+) diff --git a/fuse4fs/fuse4fs.c b/fuse4fs/fuse4fs.c index 544ad9ecb06d45..26b9c6340b73a1 100644 --- a/fuse4fs/fuse4fs.c +++ b/fuse4fs/fuse4fs.c @@ -228,6 +228,7 @@ struct fuse4fs_file_handle { enum fuse4fs_opstate { F4OP_READONLY, + F4OP_WRITABLE_FROZEN, F4OP_WRITABLE, F4OP_SHUTDOWN, }; @@ -6153,6 +6154,91 @@ static void op_fallocate(fuse_req_t req, fuse_ino_t fino EXT2FS_ATTR((unused)), } #endif /* SUPPORT_FALLOCATE */ +#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99) +static void op_freezefs(fuse_req_t req, fuse_ino_t ino, uint64_t unlinked) +{ + struct fuse4fs *ff = fuse4fs_get(req); + ext2_filsys fs; + errcode_t err; + int ret = 0; + + FUSE4FS_CHECK_CONTEXT(req); + fs = fuse4fs_start(ff); + + if (ff->opstate == F4OP_WRITABLE) { + if (fs->super->s_error_count) + fs->super->s_state |= EXT2_ERROR_FS; + else if (!unlinked) + fs->super->s_state |= EXT2_VALID_FS; + ext2fs_mark_super_dirty(fs); + err = ext2fs_set_gdt_csum(fs); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + err = ext2fs_flush2(fs, 0); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + ff->opstate = F4OP_WRITABLE_FROZEN; + } + +out_unlock: + fs->super->s_state &= ~EXT2_VALID_FS; + fuse4fs_finish(ff, ret); + fuse_reply_err(req, -ret); +} + +static void op_unfreezefs(fuse_req_t req, fuse_ino_t ino) +{ + struct fuse4fs *ff = fuse4fs_get(req); + ext2_filsys fs; + errcode_t err; + int ret = 0; + + FUSE4FS_CHECK_CONTEXT(req); + fs = fuse4fs_start(ff); + + if (ff->opstate == F4OP_WRITABLE_FROZEN) { + if (fs->super->s_error_count) + fs->super->s_state |= EXT2_ERROR_FS; + fs->super->s_state &= ~EXT2_VALID_FS; + ext2fs_mark_super_dirty(fs); + err = ext2fs_set_gdt_csum(fs); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + err = ext2fs_flush2(fs, 0); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + ff->opstate = F4OP_WRITABLE; + } + +out_unlock: + fuse4fs_finish(ff, ret); + fuse_reply_err(req, -ret); +} + +static void op_shutdownfs(fuse_req_t req, fuse_ino_t ino, uint64_t flags) +{ + const struct fuse_ctx *ctxt = fuse_req_ctx(req); + struct fuse4fs *ff = fuse4fs_get(req); + int ret; + + ret = ioctl_shutdown(ff, ctxt, NULL, NULL, 0); + + fuse_reply_err(req, -ret); +} +#endif + #ifdef HAVE_FUSE_IOMAP static void fuse4fs_iomap_hole(struct fuse4fs *ff, struct fuse_file_iomap *iomap, off_t pos, uint64_t count) @@ -7441,6 +7527,11 @@ static struct fuse_lowlevel_ops fs_ops = { #if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 18) .statx = op_statx, #endif +#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99) + .freezefs = op_freezefs, + .unfreezefs = op_unfreezefs, + .shutdownfs = op_shutdownfs, +#endif #ifdef HAVE_FUSE_IOMAP .iomap_begin = op_iomap_begin, .iomap_end = op_iomap_end, diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c index e6853a9be7dd03..763e1386bb54c8 100644 --- a/misc/fuse2fs.c +++ b/misc/fuse2fs.c @@ -222,6 +222,7 @@ struct fuse2fs_file_handle { enum fuse2fs_opstate { F2OP_READONLY, + F2OP_WRITABLE_FROZEN, F2OP_WRITABLE, F2OP_SHUTDOWN, }; @@ -5687,6 +5688,86 @@ static int op_fallocate(const char *path EXT2FS_ATTR((unused)), int mode, } #endif /* SUPPORT_FALLOCATE */ +#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99) +static int op_freezefs(const char *path, uint64_t unlinked) +{ + struct fuse2fs *ff = fuse2fs_get(); + ext2_filsys fs; + errcode_t err; + int ret = 0; + + FUSE2FS_CHECK_CONTEXT(ff); + fs = fuse2fs_start(ff); + + if (ff->opstate == F2OP_WRITABLE) { + if (fs->super->s_error_count) + fs->super->s_state |= EXT2_ERROR_FS; + else if (!unlinked) + fs->super->s_state |= EXT2_VALID_FS; + ext2fs_mark_super_dirty(fs); + err = ext2fs_set_gdt_csum(fs); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + err = ext2fs_flush2(fs, 0); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + ff->opstate = F2OP_WRITABLE_FROZEN; + } + +out_unlock: + fs->super->s_state &= ~EXT2_VALID_FS; + fuse2fs_finish(ff, ret); + return ret; +} + +static int op_unfreezefs(const char *path) +{ + struct fuse2fs *ff = fuse2fs_get(); + ext2_filsys fs; + errcode_t err; + int ret = 0; + + FUSE2FS_CHECK_CONTEXT(ff); + fs = fuse2fs_start(ff); + + if (ff->opstate == F2OP_WRITABLE_FROZEN) { + if (fs->super->s_error_count) + fs->super->s_state |= EXT2_ERROR_FS; + ext2fs_mark_super_dirty(fs); + err = ext2fs_set_gdt_csum(fs); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + err = ext2fs_flush2(fs, 0); + if (err) { + ret = translate_error(fs, 0, err); + goto out_unlock; + } + + ff->opstate = F2OP_WRITABLE; + } + +out_unlock: + fuse2fs_finish(ff, ret); + return ret; +} + +static int op_shutdownfs(const char *path, uint64_t flags) +{ + struct fuse2fs *ff = fuse2fs_get(); + + return ioctl_shutdown(ff, NULL, NULL); +} +#endif + #ifdef HAVE_FUSE_IOMAP static void fuse2fs_iomap_hole(struct fuse2fs *ff, struct fuse_file_iomap *iomap, off_t pos, uint64_t count) @@ -6967,6 +7048,9 @@ static struct fuse_operations fs_ops = { #endif #if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99) .getattr_iflags = op_getattr_iflags, + .freezefs = op_freezefs, + .unfreezefs = op_unfreezefs, + .shutdownfs = op_shutdownfs, #endif #ifdef HAVE_FUSE_IOMAP .iomap_begin = op_iomap_begin,