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GET /api/patches/2197421/?format=api
{ "id": 2197421, "url": "http://patchwork.ozlabs.org/api/patches/2197421/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260217214741.1928576-14-cel@kernel.org/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/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, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260217214741.1928576-14-cel@kernel.org>", "list_archive_url": null, "date": "2026-02-17T21:47:37", "name": "[v8,13/17] vboxsf: Implement fileattr_get for case sensitivity", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "2889a8a6547743b92c2b4f911160067afa9ee76a", "submitter": { "id": 86689, "url": "http://patchwork.ozlabs.org/api/people/86689/?format=api", "name": "Chuck Lever", "email": "cel@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260217214741.1928576-14-cel@kernel.org/mbox/", "series": [ { "id": 492483, "url": "http://patchwork.ozlabs.org/api/series/492483/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=492483", "date": "2026-02-17T21:47:25", "name": "Subject: Exposing case folding behavior", "version": 8, "mbox": "http://patchwork.ozlabs.org/series/492483/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2197421/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2197421/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=jZS1=AV=vger.kernel.org=linux-ext4+bounces-13724-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=VUUjwpqa;\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=1771364898;\n\tbh=pqdeI5TQwNAuQp+gfTQuqsR0XDwiEm8X5PZvM+QQUsU=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=VUUjwpqaqT8j+ucTcrYiXZcuuBReXbKR2b1qvdLgba5tEaA+Q10sloFLiIdWMUuG2\n\t Zxa62EjYG/p0e5DDN1d9+Ldln1aOvpCuO4myfvsCYWpQJltxbpCgdaoFj3RmuIf16K\n\t 8MgG/OKf0Irbnl6B2BaQhG9MkoLbXewkmsdP5qThLeQMifJekJU2NbWspe2fjNHywe\n\t jFOBulYQXyzbtVtlWK9ed20sIzDRTKClcnfl1taD3pAIyF6zjh3QwXF8LuCpxJCq5t\n\t XubPWp/qBSXq+8OFXuB2vKTVF4vW8N5ju4lqp+5R2lwjqSQBybHmrBOljT6JxGOD3D\n\t bVFhZB0hV93nQ==", "From": "Chuck Lever <cel@kernel.org>", "To": "Al Viro <viro@zeniv.linux.org.uk>,\n\tChristian Brauner <brauner@kernel.org>,\n\tJan Kara <jack@suse.cz>", "Cc": "linux-fsdevel@vger.kernel.org,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-xfs@vger.kernel.org,\n\tlinux-cifs@vger.kernel.org,\n\tlinux-nfs@vger.kernel.org,\n\tlinux-api@vger.kernel.org,\n\tlinux-f2fs-devel@lists.sourceforge.net,\n\thirofumi@mail.parknet.co.jp,\n\tlinkinjeon@kernel.org,\n\tsj1557.seo@samsung.com,\n\tyuezhang.mo@sony.com,\n\talmaz.alexandrovich@paragon-software.com,\n\tslava@dubeyko.com,\n\tglaubitz@physik.fu-berlin.de,\n\tfrank.li@vivo.com,\n\ttytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tcem@kernel.org,\n\tsfrench@samba.org,\n\tpc@manguebit.org,\n\tronniesahlberg@gmail.com,\n\tsprasad@microsoft.com,\n\ttrondmy@kernel.org,\n\tanna@kernel.org,\n\tjaegeuk@kernel.org,\n\tchao@kernel.org,\n\thansg@kernel.org,\n\tsenozhatsky@chromium.org,\n\tChuck Lever <chuck.lever@oracle.com>", "Subject": "[PATCH v8 13/17] vboxsf: Implement fileattr_get for case sensitivity", "Date": "Tue, 17 Feb 2026 16:47:37 -0500", "Message-ID": "<20260217214741.1928576-14-cel@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260217214741.1928576-1-cel@kernel.org>", "References": "<20260217214741.1928576-1-cel@kernel.org>", "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-Transfer-Encoding": "8bit", "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: Chuck Lever <chuck.lever@oracle.com>\n\nUpper layers such as NFSD need a way to query whether a\nfilesystem handles filenames in a case-sensitive manner. Report\nVirtualBox shared folder case handling behavior via the\nFS_XFLAG_CASEFOLD flag.\n\nThe case sensitivity property is queried from the VirtualBox host\nservice at mount time and cached in struct vboxsf_sbi. The host\ndetermines case sensitivity based on the underlying host filesystem\n(for example, Windows NTFS is case-insensitive while Linux ext4 is\ncase-sensitive).\n\nVirtualBox shared folders always preserve filename case exactly\nas provided by the guest. The host interface does not expose a\ncase_preserving property, so this is hardcoded to true.\n\nThe callback is registered in all three inode_operations\nstructures (directory, file, and symlink) to ensure consistent\nreporting across all inode types.\n\nSigned-off-by: Chuck Lever <chuck.lever@oracle.com>\n---\n fs/vboxsf/dir.c | 1 +\n fs/vboxsf/file.c | 6 ++++--\n fs/vboxsf/super.c | 4 ++++\n fs/vboxsf/utils.c | 31 +++++++++++++++++++++++++++++++\n fs/vboxsf/vfsmod.h | 6 ++++++\n 5 files changed, 46 insertions(+), 2 deletions(-)", "diff": "diff --git a/fs/vboxsf/dir.c b/fs/vboxsf/dir.c\nindex 42bedc4ec7af..c5bd3271aa96 100644\n--- a/fs/vboxsf/dir.c\n+++ b/fs/vboxsf/dir.c\n@@ -477,4 +477,5 @@ const struct inode_operations vboxsf_dir_iops = {\n \t.symlink = vboxsf_dir_symlink,\n \t.getattr = vboxsf_getattr,\n \t.setattr = vboxsf_setattr,\n+\t.fileattr_get = vboxsf_fileattr_get,\n };\ndiff --git a/fs/vboxsf/file.c b/fs/vboxsf/file.c\nindex 111752010edb..30a4f4262928 100644\n--- a/fs/vboxsf/file.c\n+++ b/fs/vboxsf/file.c\n@@ -222,7 +222,8 @@ const struct file_operations vboxsf_reg_fops = {\n \n const struct inode_operations vboxsf_reg_iops = {\n \t.getattr = vboxsf_getattr,\n-\t.setattr = vboxsf_setattr\n+\t.setattr = vboxsf_setattr,\n+\t.fileattr_get = vboxsf_fileattr_get,\n };\n \n static int vboxsf_read_folio(struct file *file, struct folio *folio)\n@@ -389,5 +390,6 @@ static const char *vboxsf_get_link(struct dentry *dentry, struct inode *inode,\n }\n \n const struct inode_operations vboxsf_lnk_iops = {\n-\t.get_link = vboxsf_get_link\n+\t.get_link = vboxsf_get_link,\n+\t.fileattr_get = vboxsf_fileattr_get,\n };\ndiff --git a/fs/vboxsf/super.c b/fs/vboxsf/super.c\nindex 241647b060ee..fcabeca2a339 100644\n--- a/fs/vboxsf/super.c\n+++ b/fs/vboxsf/super.c\n@@ -185,6 +185,10 @@ static int vboxsf_fill_super(struct super_block *sb, struct fs_context *fc)\n \tif (err)\n \t\tgoto fail_unmap;\n \n+\terr = vboxsf_query_case_sensitive(sbi);\n+\tif (err)\n+\t\tgoto fail_unmap;\n+\n \tsb->s_magic = VBOXSF_SUPER_MAGIC;\n \tsb->s_blocksize = 1024;\n \tsb->s_maxbytes = MAX_LFS_FILESIZE;\ndiff --git a/fs/vboxsf/utils.c b/fs/vboxsf/utils.c\nindex 9515bbf0b54c..658b8b0ebbd7 100644\n--- a/fs/vboxsf/utils.c\n+++ b/fs/vboxsf/utils.c\n@@ -11,6 +11,7 @@\n #include <linux/sizes.h>\n #include <linux/pagemap.h>\n #include <linux/vfs.h>\n+#include <linux/fileattr.h>\n #include \"vfsmod.h\"\n \n struct inode *vboxsf_new_inode(struct super_block *sb)\n@@ -567,3 +568,33 @@ int vboxsf_dir_read_all(struct vboxsf_sbi *sbi, struct vboxsf_dir_info *sf_d,\n \n \treturn err;\n }\n+\n+int vboxsf_query_case_sensitive(struct vboxsf_sbi *sbi)\n+{\n+\tstruct shfl_volinfo volinfo = {};\n+\tu32 buf_len;\n+\tint err;\n+\n+\tbuf_len = sizeof(volinfo);\n+\terr = vboxsf_fsinfo(sbi->root, 0, SHFL_INFO_GET | SHFL_INFO_VOLUME,\n+\t\t\t &buf_len, &volinfo);\n+\tif (err)\n+\t\treturn err;\n+\n+\tsbi->case_insensitive = !volinfo.properties.case_sensitive;\n+\treturn 0;\n+}\n+\n+int vboxsf_fileattr_get(struct dentry *dentry, struct file_kattr *fa)\n+{\n+\tstruct vboxsf_sbi *sbi = VBOXSF_SBI(dentry->d_sb);\n+\n+\t/*\n+\t * VirtualBox shared folders preserve filename case exactly as\n+\t * provided by the guest (the default). The host interface does\n+\t * not expose a case-preservation property.\n+\t */\n+\tif (sbi->case_insensitive)\n+\t\tfa->fsx_xflags |= FS_XFLAG_CASEFOLD;\n+\treturn 0;\n+}\ndiff --git a/fs/vboxsf/vfsmod.h b/fs/vboxsf/vfsmod.h\nindex 05973eb89d52..b61afd0ce842 100644\n--- a/fs/vboxsf/vfsmod.h\n+++ b/fs/vboxsf/vfsmod.h\n@@ -47,6 +47,7 @@ struct vboxsf_sbi {\n \tu32 next_generation;\n \tu32 root;\n \tint bdi_id;\n+\tbool case_insensitive;\n };\n \n /* per-inode information */\n@@ -111,6 +112,11 @@ void vboxsf_dir_info_free(struct vboxsf_dir_info *p);\n int vboxsf_dir_read_all(struct vboxsf_sbi *sbi, struct vboxsf_dir_info *sf_d,\n \t\t\tu64 handle);\n \n+int vboxsf_query_case_sensitive(struct vboxsf_sbi *sbi);\n+\n+struct file_kattr;\n+int vboxsf_fileattr_get(struct dentry *dentry, struct file_kattr *fa);\n+\n /* from vboxsf_wrappers.c */\n int vboxsf_connect(void);\n void vboxsf_disconnect(void);\n", "prefixes": [ "v8", "13/17" ] }