1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef _LINUX_FILEATTR_H 4 #define _LINUX_FILEATTR_H 5 6 /* Flags shared betwen flags/xflags */ 7 #define FS_COMMON_FL \ 8 (FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \ 9 FS_NODUMP_FL | FS_NOATIME_FL | FS_DAX_FL | \ 10 FS_PROJINHERIT_FL) 11 12 #define FS_XFLAG_COMMON \ 13 (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \ 14 FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \ 15 FS_XFLAG_PROJINHERIT) 16 17 /* 18 * Merged interface for miscellaneous file attributes. 'flags' originates from 19 * ext* and 'fsx_flags' from xfs. There's some overlap between the two, which 20 * is handled by the VFS helpers, so filesystems are free to implement just one 21 * or both of these sub-interfaces. 22 */ 23 struct fileattr { 24 u32 flags; /* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */ 25 /* struct fsxattr: */ 26 u32 fsx_xflags; /* xflags field value (get/set) */ 27 u32 fsx_extsize; /* extsize field value (get/set)*/ 28 u32 fsx_nextents; /* nextents field value (get) */ 29 u32 fsx_projid; /* project identifier (get/set) */ 30 u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ 31 /* selectors: */ 32 bool flags_valid:1; 33 bool fsx_valid:1; 34 }; 35 36 int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa); 37 38 void fileattr_fill_xflags(struct fileattr *fa, u32 xflags); 39 void fileattr_fill_flags(struct fileattr *fa, u32 flags); 40 41 /** 42 * fileattr_has_fsx - check for extended flags/attributes 43 * @fa: fileattr pointer 44 * 45 * Return: true if any attributes are present that are not represented in 46 * ->flags. 47 */ fileattr_has_fsx(const struct fileattr * fa)48static inline bool fileattr_has_fsx(const struct fileattr *fa) 49 { 50 return fa->fsx_valid && 51 ((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 || 52 fa->fsx_projid != 0 || fa->fsx_cowextsize != 0); 53 } 54 55 int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa); 56 int vfs_fileattr_set(struct user_namespace *mnt_userns, struct dentry *dentry, 57 struct fileattr *fa); 58 59 #endif /* _LINUX_FILEATTR_H */ 60