{"id":2228065,"url":"http://patchwork.ozlabs.org/api/patches/2228065/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260424-case-sensitivity-v11-8-de5619beddaf@oracle.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/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,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260424-case-sensitivity-v11-8-de5619beddaf@oracle.com>","list_archive_url":null,"date":"2026-04-25T01:53:10","name":"[v11,08/15] xfs: Report case sensitivity in fileattr_get","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"fb522e4158a6563dfbd8d8527b3b3f020a48953c","submitter":{"id":86689,"url":"http://patchwork.ozlabs.org/api/people/86689/?format=json","name":"Chuck Lever","email":"cel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260424-case-sensitivity-v11-8-de5619beddaf@oracle.com/mbox/","series":[{"id":501417,"url":"http://patchwork.ozlabs.org/api/series/501417/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=501417","date":"2026-04-25T01:53:02","name":"Exposing case folding behavior","version":11,"mbox":"http://patchwork.ozlabs.org/series/501417/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2228065/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2228065/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","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=Gcm3B2fY;\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=1777082023;\n\tbh=McAV5CNKh/R32ZPI5KLOc1CCIaEWTg3RbqF39WjLumM=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=Gcm3B2fYKLJtxa8hvELCu3SPnsWf6ztbABIOOGN9y6Q6Mku3H8vvUvPhEe26cC0Xw\n\t Z002rynAe/XRvkHF6aP2PopMkXjR1Wv8hB2mh6JLJsSR79pPLWRTAOMKe2YvL881/L\n\t DmHEgCb/DsCfl+V0jk6cYaIteSqEVJU4kF3Avj/Zni2y25qscJdjf21rAVhB8QhduI\n\t /WwnIVSD9wmACx2XTUi9Hh6m9KM0iFVtwJKLVypZRpLTk+3lkzTWImU8w84g3bPc9U\n\t YqGL0G2wfLBfhf5pTsvQ6DW6aFBKMHH/I07H+7OagTcG7RXH4xVokcYcNmR8isboPy\n\t mbCvXANhw3pNg==","From":"Chuck Lever ","Date":"Fri, 24 Apr 2026 21:53:10 -0400","Subject":"[PATCH v11 08/15] xfs: Report case sensitivity in fileattr_get","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","Message-Id":"<20260424-case-sensitivity-v11-8-de5619beddaf@oracle.com>","References":"<20260424-case-sensitivity-v11-0-de5619beddaf@oracle.com>","In-Reply-To":"<20260424-case-sensitivity-v11-0-de5619beddaf@oracle.com>","To":"Al Viro ,\n Christian Brauner , Jan Kara ","Cc":"linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,\n linux-xfs@vger.kernel.org, linux-cifs@vger.kernel.org,\n linux-nfs@vger.kernel.org, linux-api@vger.kernel.org,\n linux-f2fs-devel@lists.sourceforge.net, hirofumi@mail.parknet.co.jp,\n linkinjeon@kernel.org, sj1557.seo@samsung.com, yuezhang.mo@sony.com,\n almaz.alexandrovich@paragon-software.com, slava@dubeyko.com,\n glaubitz@physik.fu-berlin.de, frank.li@vivo.com, tytso@mit.edu,\n adilger.kernel@dilger.ca, cem@kernel.org, sfrench@samba.org,\n pc@manguebit.org, ronniesahlberg@gmail.com, sprasad@microsoft.com,\n trondmy@kernel.org, anna@kernel.org, jaegeuk@kernel.org, chao@kernel.org,\n hansg@kernel.org, senozhatsky@chromium.org,\n Chuck Lever ,\n Roland Mainz ","X-Mailer":"b4 0.16-dev","X-Developer-Signature":"v=1; a=openpgp-sha256; l=1864;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=RS1NIQW3n5GlbUoKY0pTlmEy0aDu/j9sxZEq/mBzFA4=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp7B6Q6D91o7/MLr7c2zWRs0GCu5gLIEhcOjU7/\n rK0Gf8Oh5yJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaewekAAKCRAzarMzb2Z/\n l8bkD/kBBqZqXFav38eelQEr/+UzlNvGTeUgVS9X9STU3qv7LpwYVCdXGB8WzzwRr+7Hej9CSTn\n n3jk3qIq5wnKC0c40tNfYadmvQFA9JxWuDuFZe1zukJqTWXuGZ6+Z+Am6LGRRiPOxizUW1C3mJe\n OMYX87ic2p16Ub9McqmRxFhUXXDSfrQtZYiFvm/IBYndrmQNc91C15mMWfM0FvxBosF9lQt+SfK\n 3rx4OKRyhtqfqVSED49uc8TSe1ceKHlRJuQdOax3jXSX0jIjPiKB02bF+8uFsB2MtTrn76sMrpD\n jpBv5PdU+/DA2VQyx8u+90lalhH1I99St6XCRyyiCG8VVXO92gaSxMPoN5rO6MxcNre/Hrfb81z\n 4wVJncFAXaEbuqWIxo6cMy9og3iNDX8AUddTyemP4Bb6dfBTReddetmqXf7AIf9zzsJGRZU45gz\n GJ84LZLdGAdo9f98rvuXGR8flp4XYcf31g76Z91wIak9nbliy3sPpYJTnmEamYVIT05SK9rXpS0\n wKoSUIjSWxURSsKX8gqaWLjx2LhU8fQGEqqO0j4u3y4cUSD5CcfMgtIvJVTTN33tpa95F5Dm3x5\n A1z+nafZOiH7XEptWSI4JDpBsozEa2cexJwB/fbN1SYaLj7g3Dj67cuNaWO7HFXSGn/GgwKy6PA\n jpxvjWyTsmCFx7w==","X-Developer-Key":"i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97","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 \n\nUpper layers such as NFSD need to query whether a filesystem\nis case-sensitive. Add FS_XFLAG_CASEFOLD to xfs_ip2xflags()\nwhen the filesystem is formatted with the ASCIICI feature\nflag. This serves both FS_IOC_FSGETXATTR (via xfs_fill_fsxattr() in\nxfs_fileattr_get()) and XFS_IOC_BULKSTAT (which populates bs_xflags\ndirectly from xfs_ip2xflags()), so bulkstat consumers and per-inode\nqueries see a consistent view of the filesystem's case-folding\nbehavior.\n\nXFS always preserves case. XFS is case-sensitive by default, but\nsupports ASCII case-insensitive lookups when formatted with the\nASCIICI feature flag.\n\nReviewed-by: Roland Mainz \nSigned-off-by: Chuck Lever \n---\n fs/xfs/libxfs/xfs_inode_util.c | 2 ++\n fs/xfs/xfs_ioctl.c | 7 +++++++\n 2 files changed, 9 insertions(+)","diff":"diff --git a/fs/xfs/libxfs/xfs_inode_util.c b/fs/xfs/libxfs/xfs_inode_util.c\nindex 551fa51befb6..82be54b6f8d3 100644\n--- a/fs/xfs/libxfs/xfs_inode_util.c\n+++ b/fs/xfs/libxfs/xfs_inode_util.c\n@@ -130,6 +130,8 @@ xfs_ip2xflags(\n \n \tif (xfs_inode_has_attr_fork(ip))\n \t\tflags |= FS_XFLAG_HASATTR;\n+\tif (xfs_has_asciici(ip->i_mount))\n+\t\tflags |= FS_XFLAG_CASEFOLD;\n \treturn flags;\n }\n \ndiff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c\nindex ed9b4846c05f..5a58fb0bad2b 100644\n--- a/fs/xfs/xfs_ioctl.c\n+++ b/fs/xfs/xfs_ioctl.c\n@@ -472,6 +472,13 @@ xfs_fill_fsxattr(\n \n \tfileattr_fill_xflags(fa, xfs_ip2xflags(ip));\n \n+\t/*\n+\t * FS_XFLAG_CASEFOLD is read-only; hide it from the legacy\n+\t * flags view so chattr's RMW cycle does not pass it back to\n+\t * xfs_fileattr_set().\n+\t */\n+\tfa->flags &= ~FS_CASEFOLD_FL;\n+\n \tif (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {\n \t\tfa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);\n \t} else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {\n","prefixes":["v11","08/15"]}