{"id":2230311,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2230311/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214874.4107473.5521741952753076823.stgit@frogsfrogsfrogs/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.1/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<177747214874.4107473.5521741952753076823.stgit@frogsfrogsfrogs>","date":"2026-04-29T14:57:34","name":"[19/19] fuse2fs: implement freeze and shutdown requests","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"f88796c82bf799504718ec7ab33e2e923f78948b","submitter":{"id":77032,"url":"http://patchwork.ozlabs.org/api/1.1/people/77032/?format=json","name":"Darrick J. Wong","email":"djwong@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214874.4107473.5521741952753076823.stgit@frogsfrogsfrogs/mbox/","series":[{"id":502087,"url":"http://patchwork.ozlabs.org/api/1.1/series/502087/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=502087","date":"2026-04-29T14:53:09","name":"[01/19] fuse2fs: implement bare minimum iomap for file mapping reporting","version":1,"mbox":"http://patchwork.ozlabs.org/series/502087/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2230311/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2230311/checks/","tags":{},"headers":{"Return-Path":"\n <SRS0=4Nli=C4=vger.kernel.org=linux-ext4+bounces-16208-patchwork-incoming=ozlabs.org@ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=eIrsRWKT;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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arc=none smtp.client-ip=10.30.226.201"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777474655;\n\tbh=kq3dJ2+gy6wjNQ7nee2+gKFa23GHv9vLJoH0IH/UgDM=;\n\th=Date:Subject:From:To:Cc:In-Reply-To:References:From;\n\tb=eIrsRWKT41ECWXJT17E7/VrCUY9ArfRsdCLLIIcFZzW4xNs4LqXznhbiIghyAbl1e\n\t uhAMuZxf23srOfQCRH9T86ez4JDxhXCqWKQeQfIcw7J16PY9fUvBz+4bV3KV3wwLhV\n\t EeKDB8lyfXhG2scWY+WRln2eM/prubvOgZUwVjF7I3fC3+DohGVVM0GwVLXYDOcV6i\n\t 4UGJIxof293746EdZVpCDad+8wPikJNPiI7CrDPnXRy87h3veWm3X0Sct1Rqd+BXff\n\t AtlGpMa3+/CSCAlu028dC90dl8OkjKk3YyGypivrKaQMXJtm0G68QPp3t9yzrOgE95\n\t JhpNDh1SI7olw==","Date":"Wed, 29 Apr 2026 07:57:34 -0700","Subject":"[PATCH 19/19] fuse2fs: implement freeze and shutdown requests","From":"\"Darrick J. Wong\" <djwong@kernel.org>","To":"tytso@mit.edu","Cc":"bernd@bsbernd.com, miklos@szeredi.hu, linux-ext4@vger.kernel.org,\n neal@gompa.dev, linux-fsdevel@vger.kernel.org, fuse-devel@lists.linux.dev,\n joannelkoong@gmail.com","Message-ID":"<177747214874.4107473.5521741952753076823.stgit@frogsfrogsfrogs>","In-Reply-To":"<177747214459.4107473.9520724883867588970.stgit@frogsfrogsfrogs>","References":"<177747214459.4107473.9520724883867588970.stgit@frogsfrogsfrogs>","Precedence":"bulk","X-Mailing-List":"linux-ext4@vger.kernel.org","List-Id":"<linux-ext4.vger.kernel.org>","List-Subscribe":"<mailto:linux-ext4+subscribe@vger.kernel.org>","List-Unsubscribe":"<mailto:linux-ext4+unsubscribe@vger.kernel.org>","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","X-Spam-Status":"No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"},"content":"From: Darrick J. Wong <djwong@kernel.org>\n\nHandle freezing and shutting down the filesystem if requested.\n\nSigned-off-by: \"Darrick J. Wong\" <djwong@kernel.org>\n---\n fuse4fs/fuse4fs.c |   91 +++++++++++++++++++++++++++++++++++++++++++++++++++++\n misc/fuse2fs.c    |   84 +++++++++++++++++++++++++++++++++++++++++++++++++\n 2 files changed, 175 insertions(+)","diff":"diff --git a/fuse4fs/fuse4fs.c b/fuse4fs/fuse4fs.c\nindex 6ea2d30772ae5a..46f81e2066b044 100644\n--- a/fuse4fs/fuse4fs.c\n+++ b/fuse4fs/fuse4fs.c\n@@ -240,6 +240,7 @@ struct fuse4fs_file_handle {\n \n enum fuse4fs_opstate {\n \tF4OP_READONLY,\n+\tF4OP_WRITABLE_FROZEN,\n \tF4OP_WRITABLE,\n \tF4OP_SHUTDOWN,\n };\n@@ -6388,6 +6389,91 @@ static void op_fallocate(fuse_req_t req, fuse_ino_t fino EXT2FS_ATTR((unused)),\n }\n #endif /* SUPPORT_FALLOCATE */\n \n+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99)\n+static void op_freezefs(fuse_req_t req, fuse_ino_t ino, uint64_t unlinked)\n+{\n+\tstruct fuse4fs *ff = fuse4fs_get(req);\n+\text2_filsys fs;\n+\terrcode_t err;\n+\tint ret = 0;\n+\n+\tFUSE4FS_CHECK_CONTEXT(req);\n+\tfs = fuse4fs_start(ff);\n+\n+\tif (ff->opstate == F4OP_WRITABLE) {\n+\t\tif (fs->super->s_error_count)\n+\t\t\tfs->super->s_state |= EXT2_ERROR_FS;\n+\t\telse if (!unlinked)\n+\t\t\tfs->super->s_state |= EXT2_VALID_FS;\n+\t\text2fs_mark_super_dirty(fs);\n+\t\terr = ext2fs_set_gdt_csum(fs);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\terr = ext2fs_flush2(fs, 0);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\tff->opstate = F4OP_WRITABLE_FROZEN;\n+\t}\n+\n+out_unlock:\n+\tfs->super->s_state &= ~EXT2_VALID_FS;\n+\tfuse4fs_finish(ff, ret);\n+\tfuse_reply_err(req, -ret);\n+}\n+\n+static void op_unfreezefs(fuse_req_t req, fuse_ino_t ino)\n+{\n+\tstruct fuse4fs *ff = fuse4fs_get(req);\n+\text2_filsys fs;\n+\terrcode_t err;\n+\tint ret = 0;\n+\n+\tFUSE4FS_CHECK_CONTEXT(req);\n+\tfs = fuse4fs_start(ff);\n+\n+\tif (ff->opstate == F4OP_WRITABLE_FROZEN) {\n+\t\tif (fs->super->s_error_count)\n+\t\t\tfs->super->s_state |= EXT2_ERROR_FS;\n+\t\tfs->super->s_state &= ~EXT2_VALID_FS;\n+\t\text2fs_mark_super_dirty(fs);\n+\t\terr = ext2fs_set_gdt_csum(fs);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\terr = ext2fs_flush2(fs, 0);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\tff->opstate = F4OP_WRITABLE;\n+\t}\n+\n+out_unlock:\n+\tfuse4fs_finish(ff, ret);\n+\tfuse_reply_err(req, -ret);\n+}\n+\n+static void op_shutdownfs(fuse_req_t req, fuse_ino_t ino, uint64_t flags)\n+{\n+\tconst struct fuse_ctx *ctxt = fuse_req_ctx(req);\n+\tstruct fuse4fs *ff = fuse4fs_get(req);\n+\tint ret;\n+\n+\tret = ioctl_shutdown(ff, ctxt, NULL, NULL, 0);\n+\n+\tfuse_reply_err(req, -ret);\n+}\n+#endif\n+\n #ifdef HAVE_FUSE_IOMAP\n static void fuse4fs_iomap_hole(struct fuse4fs *ff, struct fuse_file_iomap *iomap,\n \t\t\t       off_t pos, uint64_t count)\n@@ -7685,6 +7771,11 @@ static struct fuse_lowlevel_ops fs_ops = {\n #if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 18)\n \t.statx = op_statx,\n #endif\n+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99)\n+\t.freezefs = op_freezefs,\n+\t.unfreezefs = op_unfreezefs,\n+\t.shutdownfs = op_shutdownfs,\n+#endif\n #ifdef HAVE_FUSE_IOMAP\n \t.iomap_begin = op_iomap_begin,\n \t.iomap_end = op_iomap_end,\ndiff --git a/misc/fuse2fs.c b/misc/fuse2fs.c\nindex fe45ffa86823b0..16b010fd28d4b5 100644\n--- a/misc/fuse2fs.c\n+++ b/misc/fuse2fs.c\n@@ -223,6 +223,7 @@ struct fuse2fs_file_handle {\n \n enum fuse2fs_opstate {\n \tF2OP_READONLY,\n+\tF2OP_WRITABLE_FROZEN,\n \tF2OP_WRITABLE,\n \tF2OP_SHUTDOWN,\n };\n@@ -5709,6 +5710,86 @@ static int op_fallocate(const char *path EXT2FS_ATTR((unused)), int mode,\n }\n #endif /* SUPPORT_FALLOCATE */\n \n+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99)\n+static int op_freezefs(const char *path, uint64_t unlinked)\n+{\n+\tstruct fuse2fs *ff = fuse2fs_get();\n+\text2_filsys fs;\n+\terrcode_t err;\n+\tint ret = 0;\n+\n+\tFUSE2FS_CHECK_CONTEXT(ff);\n+\tfs = fuse2fs_start(ff);\n+\n+\tif (ff->opstate == F2OP_WRITABLE) {\n+\t\tif (fs->super->s_error_count)\n+\t\t\tfs->super->s_state |= EXT2_ERROR_FS;\n+\t\telse if (!unlinked)\n+\t\t\tfs->super->s_state |= EXT2_VALID_FS;\n+\t\text2fs_mark_super_dirty(fs);\n+\t\terr = ext2fs_set_gdt_csum(fs);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\terr = ext2fs_flush2(fs, 0);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\tff->opstate = F2OP_WRITABLE_FROZEN;\n+\t}\n+\n+out_unlock:\n+\tfs->super->s_state &= ~EXT2_VALID_FS;\n+\tfuse2fs_finish(ff, ret);\n+\treturn ret;\n+}\n+\n+static int op_unfreezefs(const char *path)\n+{\n+\tstruct fuse2fs *ff = fuse2fs_get();\n+\text2_filsys fs;\n+\terrcode_t err;\n+\tint ret = 0;\n+\n+\tFUSE2FS_CHECK_CONTEXT(ff);\n+\tfs = fuse2fs_start(ff);\n+\n+\tif (ff->opstate == F2OP_WRITABLE_FROZEN) {\n+\t\tif (fs->super->s_error_count)\n+\t\t\tfs->super->s_state |= EXT2_ERROR_FS;\n+\t\text2fs_mark_super_dirty(fs);\n+\t\terr = ext2fs_set_gdt_csum(fs);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\terr = ext2fs_flush2(fs, 0);\n+\t\tif (err) {\n+\t\t\tret = translate_error(fs, 0, err);\n+\t\t\tgoto out_unlock;\n+\t\t}\n+\n+\t\tff->opstate = F2OP_WRITABLE;\n+\t}\n+\n+out_unlock:\n+\tfuse2fs_finish(ff, ret);\n+\treturn ret;\n+}\n+\n+static int op_shutdownfs(const char *path, uint64_t flags)\n+{\n+\tstruct fuse2fs *ff = fuse2fs_get();\n+\n+\treturn ioctl_shutdown(ff, NULL, NULL);\n+}\n+#endif\n+\n #ifdef HAVE_FUSE_IOMAP\n static void fuse2fs_iomap_hole(struct fuse2fs *ff, struct fuse_file_iomap *iomap,\n \t\t\t       off_t pos, uint64_t count)\n@@ -6993,6 +7074,9 @@ static struct fuse_operations fs_ops = {\n #endif\n #if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 99)\n \t.getattr_iflags = op_getattr_iflags,\n+\t.freezefs = op_freezefs,\n+\t.unfreezefs = op_unfreezefs,\n+\t.shutdownfs = op_shutdownfs,\n #endif\n #ifdef HAVE_FUSE_IOMAP\n \t.iomap_begin = op_iomap_begin,\n","prefixes":["19/19"]}