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GET /api/1.1/patches/2230314/?format=api
{ "id": 2230314, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230314/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214608.4107473.9714580127528968368.stgit@frogsfrogsfrogs/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.1/projects/8/?format=api", "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": "<177747214608.4107473.9714580127528968368.stgit@frogsfrogsfrogs>", "date": "2026-04-29T14:53:40", "name": "[04/19] fuse2fs: register block devices for use with iomap", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "026b050aecab8a53cff0ea894abd37825fd04445", "submitter": { "id": 77032, "url": "http://patchwork.ozlabs.org/api/1.1/people/77032/?format=api", "name": "Darrick J. Wong", "email": "djwong@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/177747214608.4107473.9714580127528968368.stgit@frogsfrogsfrogs/mbox/", "series": [ { "id": 502087, "url": "http://patchwork.ozlabs.org/api/1.1/series/502087/?format=api", "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/2230314/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230314/checks/", "tags": {}, "headers": { "Return-Path": "\n <SRS0=lOdS=C4=vger.kernel.org=linux-ext4+bounces-16193-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=m7MAdUTZ;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777474420; c=relaxed/simple;\n\tbh=LaJ9Lq0EP/219RjzO8l2eoiRThp67IrIO2x77PHw9ZU=;\n\th=Date:Subject:From:To:Cc:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=iuFfZXLcjSZEy1PrsyLOiohxi+QlURIkpPraRqKEB/eLgkim3yQ3emA6kmRy87Z4OtNMTkJt1nGqok9v0oJw9+DWCyOvdMPe0Ai7FahLLk0hijIKJLGeskvZYXZYlkOjvleGC/nDN9qvpRBR6yeKRmidPPUnw3/ZsXW5QLjR4fY=" ], "ARC-Authentication-Results": [ "i=2; gandalf.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=m7MAdUTZ; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-ext4+bounces-16193-patchwork-incoming=ozlabs.org@vger.kernel.org;\n receiver=ozlabs.org) smtp.mailfrom=vger.kernel.org", "i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=m7MAdUTZ; 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=1777474420;\n\tbh=LaJ9Lq0EP/219RjzO8l2eoiRThp67IrIO2x77PHw9ZU=;\n\th=Date:Subject:From:To:Cc:In-Reply-To:References:From;\n\tb=m7MAdUTZ7SUoBVslnN7I7LmaLWWYt3HZtQWdlywDAmwW2+v2SDPuPkBWpl39Wp4uQ\n\t wVif97tTfjJocphR+Uf6vaLu9uTIdrXussmugeCCuiMdnsGkSJiQUW2S+NufbjYvJk\n\t o7hJqyUncXINT93WQOAsZa6DsxLtE4E5wmSGmz9+E72nhlfJ9O23qr2DVpIxjtm/kl\n\t Z2Fnd1W7cl4maGRvYxBc9jduu3xy7RVEoo7QHvo9R2P/+iYiPsM7NvFdPicAw/XuCj\n\t UnbgmfAVag73gfHQKYUew0Vl26JGuKkuKwrKsDKCad7TCxi5zIuZnmIMgitoL3RFa2\n\t ddmVoA5BrWoYw==", "Date": "Wed, 29 Apr 2026 07:53:40 -0700", "Subject": "[PATCH 04/19] fuse2fs: register block devices for use with iomap", "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": "<177747214608.4107473.9714580127528968368.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\nRegister the ext4 block device with the kernel for use with iomap.\n\nSigned-off-by: \"Darrick J. Wong\" <djwong@kernel.org>\n---\n fuse4fs/fuse4fs.c | 44 ++++++++++++++++++++++++++++++++++++++++----\n misc/fuse2fs.c | 42 ++++++++++++++++++++++++++++++++++++++----\n 2 files changed, 78 insertions(+), 8 deletions(-)", "diff": "diff --git a/fuse4fs/fuse4fs.c b/fuse4fs/fuse4fs.c\nindex feb46bdfbac39b..3e9852f585302d 100644\n--- a/fuse4fs/fuse4fs.c\n+++ b/fuse4fs/fuse4fs.c\n@@ -284,6 +284,7 @@ struct fuse4fs {\n #ifdef HAVE_FUSE_IOMAP\n \tenum fuse4fs_feature_toggle iomap_want;\n \tenum fuse4fs_iomap_state iomap_state;\n+\tuint32_t iomap_dev;\n #endif\n \tunsigned int blockmask;\n \tunsigned long offset;\n@@ -6247,7 +6248,7 @@ static errcode_t fuse4fs_iomap_begin_extent(struct fuse4fs *ff, uint64_t ino,\n \t}\n \n \t/* Mapping overlaps startoff, report this. */\n-\tiomap->dev = FUSE_IOMAP_DEV_NULL;\n+\tiomap->dev = ff->iomap_dev;\n \tiomap->addr = FUSE4FS_FSB_TO_B(ff, extent.e_pblk) + ff->offset;\n \tiomap->offset = FUSE4FS_FSB_TO_B(ff, extent.e_lblk);\n \tiomap->length = FUSE4FS_FSB_TO_B(ff, extent.e_len);\n@@ -6280,13 +6281,14 @@ static int fuse4fs_iomap_begin_indirect(struct fuse4fs *ff, uint64_t ino,\n \tif (err)\n \t\treturn translate_error(fs, ino, err);\n \n-\tiomap->dev = FUSE_IOMAP_DEV_NULL;\n \tiomap->offset = FUSE4FS_FSB_TO_B(ff, startoff);\n \tiomap->flags |= FUSE_IOMAP_F_MERGED;\n \tif (startblock) {\n+\t\tiomap->dev = ff->iomap_dev;\n \t\tiomap->addr = FUSE4FS_FSB_TO_B(ff, startblock) + ff->offset;\n \t\tiomap->type = FUSE_IOMAP_TYPE_MAPPED;\n \t} else {\n+\t\tiomap->dev = FUSE_IOMAP_DEV_NULL;\n \t\tiomap->addr = FUSE_IOMAP_NULL_ADDR;\n \t\tiomap->type = FUSE_IOMAP_TYPE_HOLE;\n \t}\n@@ -6506,6 +6508,30 @@ static off_t fuse4fs_max_size(struct fuse4fs *ff, off_t upper_limit)\n \treturn res;\n }\n \n+static int fuse4fs_iomap_config_devices(struct fuse4fs *ff)\n+{\n+\terrcode_t err;\n+\tint fd;\n+\tint ret;\n+\n+\terr = io_channel_get_fd(ff->fs->io, &fd);\n+\tif (err)\n+\t\treturn translate_error(ff->fs, 0, err);\n+\n+\tret = fuse_lowlevel_iomap_device_add(ff->fuse, fd, 0);\n+\tif (ret < 0) {\n+\t\tdbg_printf(ff, \"%s: cannot register iomap dev fd=%d, err=%d\\n\",\n+\t\t\t __func__, fd, -ret);\n+\t\treturn translate_error(ff->fs, 0, -ret);\n+\t}\n+\n+\tdbg_printf(ff, \"%s: registered iomap dev fd=%d iomap_dev=%u\\n\",\n+\t\t __func__, fd, ff->iomap_dev);\n+\n+\tff->iomap_dev = ret;\n+\treturn 0;\n+}\n+\n static void op_iomap_config(fuse_req_t req,\n \t\t\t const struct fuse_iomap_config_params *p,\n \t\t\t size_t psize)\n@@ -6513,6 +6539,7 @@ static void op_iomap_config(fuse_req_t req,\n \tstruct fuse_iomap_config cfg = { };\n \tstruct fuse4fs *ff = fuse4fs_get(req);\n \text2_filsys fs;\n+\tint ret = 0;\n \n \tFUSE4FS_CHECK_CONTEXT(req);\n \n@@ -6547,8 +6574,16 @@ static void op_iomap_config(fuse_req_t req,\n \tcfg.flags |= FUSE_IOMAP_CONFIG_MAXBYTES;\n \tcfg.s_maxbytes = fuse4fs_max_size(ff, p->maxbytes);\n \n-\tfuse4fs_finish(ff, 0);\n-\tfuse_reply_iomap_config(req, &cfg);\n+\tret = fuse4fs_iomap_config_devices(ff);\n+\tif (ret)\n+\t\tgoto out_unlock;\n+\n+out_unlock:\n+\tfuse4fs_finish(ff, ret);\n+\tif (ret)\n+\t\tfuse_reply_err(req, -ret);\n+\telse\n+\t\tfuse_reply_iomap_config(req, &cfg);\n }\n #endif /* HAVE_FUSE_IOMAP */\n \n@@ -7084,6 +7119,7 @@ int main(int argc, char *argv[])\n #ifdef HAVE_FUSE_IOMAP\n \t\t.iomap_want = FT_DEFAULT,\n \t\t.iomap_state = IOMAP_UNKNOWN,\n+\t\t.iomap_dev = FUSE_IOMAP_DEV_NULL,\n #endif\n \t};\n \terrcode_t err;\ndiff --git a/misc/fuse2fs.c b/misc/fuse2fs.c\nindex 7df4e127e5981a..c24ae461dad2ad 100644\n--- a/misc/fuse2fs.c\n+++ b/misc/fuse2fs.c\n@@ -40,6 +40,7 @@\n # define _FILE_OFFSET_BITS 64\n #endif /* _FILE_OFFSET_BITS */\n #include <fuse.h>\n+#include <fuse_lowlevel.h>\n #ifdef __SET_FOB_FOR_FUSE\n # undef _FILE_OFFSET_BITS\n #endif /* __SET_FOB_FOR_FUSE */\n@@ -266,6 +267,7 @@ struct fuse2fs {\n #ifdef HAVE_FUSE_IOMAP\n \tenum fuse2fs_feature_toggle iomap_want;\n \tenum fuse2fs_iomap_state iomap_state;\n+\tuint32_t iomap_dev;\n #endif\n \tunsigned int blockmask;\n \tunsigned long offset;\n@@ -5481,7 +5483,7 @@ static errcode_t fuse2fs_iomap_begin_extent(struct fuse2fs *ff, uint64_t ino,\n \t}\n \n \t/* Mapping overlaps startoff, report this. */\n-\tiomap->dev = FUSE_IOMAP_DEV_NULL;\n+\tiomap->dev = ff->iomap_dev;\n \tiomap->addr = FUSE2FS_FSB_TO_B(ff, extent.e_pblk) + ff->offset;\n \tiomap->offset = FUSE2FS_FSB_TO_B(ff, extent.e_lblk);\n \tiomap->length = FUSE2FS_FSB_TO_B(ff, extent.e_len);\n@@ -5514,13 +5516,14 @@ static int fuse2fs_iomap_begin_indirect(struct fuse2fs *ff, uint64_t ino,\n \tif (err)\n \t\treturn translate_error(fs, ino, err);\n \n-\tiomap->dev = FUSE_IOMAP_DEV_NULL;\n \tiomap->offset = FUSE2FS_FSB_TO_B(ff, startoff);\n \tiomap->flags |= FUSE_IOMAP_F_MERGED;\n \tif (startblock) {\n+\t\tiomap->dev = ff->iomap_dev;\n \t\tiomap->addr = FUSE2FS_FSB_TO_B(ff, startblock) + ff->offset;\n \t\tiomap->type = FUSE_IOMAP_TYPE_MAPPED;\n \t} else {\n+\t\tiomap->dev = FUSE_IOMAP_DEV_NULL;\n \t\tiomap->addr = FUSE_IOMAP_NULL_ADDR;\n \t\tiomap->type = FUSE_IOMAP_TYPE_HOLE;\n \t}\n@@ -5739,11 +5742,36 @@ static off_t fuse2fs_max_size(struct fuse2fs *ff, off_t upper_limit)\n \treturn res;\n }\n \n+static int fuse2fs_iomap_config_devices(struct fuse2fs *ff)\n+{\n+\terrcode_t err;\n+\tint fd;\n+\tint ret;\n+\n+\terr = io_channel_get_fd(ff->fs->io, &fd);\n+\tif (err)\n+\t\treturn translate_error(ff->fs, 0, err);\n+\n+\tret = fuse_fs_iomap_device_add(fd, 0);\n+\tif (ret < 0) {\n+\t\tdbg_printf(ff, \"%s: cannot register iomap dev fd=%d, err=%d\\n\",\n+\t\t\t __func__, fd, -ret);\n+\t\treturn translate_error(ff->fs, 0, -ret);\n+\t}\n+\n+\tdbg_printf(ff, \"%s: registered iomap dev fd=%d iomap_dev=%u\\n\",\n+\t\t __func__, fd, ff->iomap_dev);\n+\n+\tff->iomap_dev = ret;\n+\treturn 0;\n+}\n+\n static int op_iomap_config(const struct fuse_iomap_config_params *p,\n \t\t\t size_t psize, struct fuse_iomap_config *cfg)\n {\n \tstruct fuse2fs *ff = fuse2fs_get();\n \text2_filsys fs;\n+\tint ret = 0;\n \n \tFUSE2FS_CHECK_CONTEXT(ff);\n \n@@ -5778,8 +5806,13 @@ static int op_iomap_config(const struct fuse_iomap_config_params *p,\n \tcfg->flags |= FUSE_IOMAP_CONFIG_MAXBYTES;\n \tcfg->s_maxbytes = fuse2fs_max_size(ff, p->maxbytes);\n \n-\tfuse2fs_finish(ff, 0);\n-\treturn 0;\n+\tret = fuse2fs_iomap_config_devices(ff);\n+\tif (ret)\n+\t\tgoto out_unlock;\n+\n+out_unlock:\n+\tfuse2fs_finish(ff, ret);\n+\treturn ret;\n }\n #endif /* HAVE_FUSE_IOMAP */\n \n@@ -6145,6 +6178,7 @@ int main(int argc, char *argv[])\n #ifdef HAVE_FUSE_IOMAP\n \t\t.iomap_want = FT_DEFAULT,\n \t\t.iomap_state = IOMAP_UNKNOWN,\n+\t\t.iomap_dev = FUSE_IOMAP_DEV_NULL,\n #endif\n \t};\n \terrcode_t err;\n", "prefixes": [ "04/19" ] }