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([49.205.218.89]) by smtp.gmail.com with ESMTPSA id x11-20020aa784cb000000b006e45c5d7720sm4138206pfn.93.2024.03.01.23.42.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Mar 2024 23:42:31 -0800 (PST) From: "Ritesh Harjani (IBM)" To: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org Cc: Ojaswin Mujoo , Jan Kara , Theodore Ts'o , Matthew Wilcox , "Darrick J . Wong" , Luis Chamberlain , John Garry , linux-kernel@vger.kernel.org, "Ritesh Harjani (IBM)" Subject: [RFC 2/8] fs: Reserve inode flag FS_ATOMICWRITES_FL for atomic writes Date: Sat, 2 Mar 2024 13:11:59 +0530 Message-ID: <4c687c1c5322b4eaf0bb173f0b5d58b38fdaa847.1709361537.git.ritesh.list@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <555cc3e262efa77ee5648196362f415a1efc018d.1709361537.git.ritesh.list@gmail.com> References: <555cc3e262efa77ee5648196362f415a1efc018d.1709361537.git.ritesh.list@gmail.com> Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This reserves FS_ATOMICWRITES_FL for flags and adds support in fileattr to support atomic writes flag & xflag needed for ext4 and xfs. Co-developed-by: Ojaswin Mujoo Signed-off-by: Ojaswin Mujoo Signed-off-by: Ritesh Harjani (IBM) --- fs/ioctl.c | 4 ++++ include/linux/fileattr.h | 4 ++-- include/uapi/linux/fs.h | 1 + 3 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/ioctl.c b/fs/ioctl.c index 76cf22ac97d7..e0f7fae4777e 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -481,6 +481,8 @@ void fileattr_fill_xflags(struct fileattr *fa, u32 xflags) fa->flags |= FS_DAX_FL; if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT) fa->flags |= FS_PROJINHERIT_FL; + if (fa->fsx_xflags & FS_XFLAG_ATOMICWRITES) + fa->flags |= FS_ATOMICWRITES_FL; } EXPORT_SYMBOL(fileattr_fill_xflags); @@ -511,6 +513,8 @@ void fileattr_fill_flags(struct fileattr *fa, u32 flags) fa->fsx_xflags |= FS_XFLAG_DAX; if (fa->flags & FS_PROJINHERIT_FL) fa->fsx_xflags |= FS_XFLAG_PROJINHERIT; + if (fa->flags & FS_ATOMICWRITES_FL) + fa->fsx_xflags |= FS_XFLAG_ATOMICWRITES; } EXPORT_SYMBOL(fileattr_fill_flags); diff --git a/include/linux/fileattr.h b/include/linux/fileattr.h index 47c05a9851d0..ae9329afa46b 100644 --- a/include/linux/fileattr.h +++ b/include/linux/fileattr.h @@ -7,12 +7,12 @@ #define FS_COMMON_FL \ (FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \ FS_NODUMP_FL | FS_NOATIME_FL | FS_DAX_FL | \ - FS_PROJINHERIT_FL) + FS_PROJINHERIT_FL | FS_ATOMICWRITES_FL) #define FS_XFLAG_COMMON \ (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \ FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \ - FS_XFLAG_PROJINHERIT) + FS_XFLAG_PROJINHERIT | FS_XFLAG_ATOMICWRITES) /* * Merged interface for miscellaneous file attributes. 'flags' originates from diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index b5b4e1db9576..17f52530f9c8 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -264,6 +264,7 @@ struct fsxattr { #define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ #define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ +#define FS_ATOMICWRITES_FL 0x01000000 /* Inode supports atomic writes */ #define FS_DAX_FL 0x02000000 /* Inode is DAX */ #define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ #define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */