Pull fileattr updates from Christian Brauner: "This introduces the new file_getattr() and file_setattr() system calls after lengthy discussions. Both system calls serve as successors and extensible companions to the FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR system calls which have started to show their age in addition to being named in a way that makes it easy to conflate them with extended attribute related operations. These syscalls allow userspace to set filesystem inode attributes on special files. One of the usage examples is the XFS quota projects. XFS has project quotas which could be attached to a directory. All new inodes in these directories inherit project ID set on parent directory. The project is created from userspace by opening and calling FS_IOC_FSSETXATTR on each inode. This is not possible for special files such as FIFO, SOCK, BLK etc. Therefore, some inodes are left with empty project ID. Those inodes then are not shown in the quota accounting but still exist in the directory. This is not critical but in the case when special files are created in the directory with already existing project quota, these new inodes inherit extended attributes. This creates a mix of special files with and without attributes. Moreover, special files with attributes don't have a possibility to become clear or change the attributes. This, in turn, prevents userspace from re-creating quota project on these existing files. In addition, these new system calls allow the implementation of additional attributes that we couldn't or didn't want to fit into the legacy ioctls anymore" * tag 'vfs-6.17-rc1.fileattr' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: fs: tighten a sanity check in file_attr_to_fileattr() tree-wide: s/struct fileattr/struct file_kattr/g fs: introduce file_getattr and file_setattr syscalls fs: prepare for extending file_get/setattr() fs: make vfs_fileattr_[get|set] return -EOPNOTSUPP selinux: implement inode_file_[g|s]etattr hooks lsm: introduce new hooks for setting/getting inode fsxattr fs: split fileattr related helpers into separate file
Showing the changes to include/uapi (2 of 64 files). Show all
Unified · Split
| @@ -852,8 +852,14 @@ __SYSCALL(__NR_removexattrat, sys_removexattrat) · 851 unmodified lines | |||
| 852 | #define __NR_open_tree_attr 467 | 852 | #define __NR_open_tree_attr 467 |
| 853 | __SYSCALL(__NR_open_tree_attr, sys_open_tree_attr) | 853 | __SYSCALL(__NR_open_tree_attr, sys_open_tree_attr) |
| 854 | 854 | ||
| 855 | /* fs/inode.c */ | ||
| 856 | #define __NR_file_getattr 468 | ||
| 857 | __SYSCALL(__NR_file_getattr, sys_file_getattr) | ||
| 858 | #define __NR_file_setattr 469 | ||
| 859 | __SYSCALL(__NR_file_setattr, sys_file_setattr) | ||
| 860 | |||
| 855 | #undef __NR_syscalls | 861 | #undef __NR_syscalls |
| 856 | #define __NR_syscalls 468 | 862 | #define __NR_syscalls 470 |
| 857 | 863 | ||
| 858 | /* | 864 | /* |
| 859 | * 32 bit systems traditionally used different | 865 | * 32 bit systems traditionally used different |
| @@ -216,6 +216,24 @@ struct fsxattr { · 215 unmodified lines | |||
| 216 | unsigned char fsx_pad[8]; | 216 | unsigned char fsx_pad[8]; |
| 217 | }; | 217 | }; |
| 218 | 218 | ||
| 219 | /* | ||
| 220 | * Variable size structure for file_[sg]et_attr(). | ||
| 221 | * | ||
| 222 | * Note. This is alternative to the structure 'struct file_kattr'/'struct fsxattr'. | ||
| 223 | * As this structure is passed to/from userspace with its size, this can | ||
| 224 | * be versioned based on the size. | ||
| 225 | */ | ||
| 226 | struct file_attr { | ||
| 227 | __u64 fa_xflags; /* xflags field value (get/set) */ | ||
| 228 | __u32 fa_extsize; /* extsize field value (get/set)*/ | ||
| 229 | __u32 fa_nextents; /* nextents field value (get) */ | ||
| 230 | __u32 fa_projid; /* project identifier (get/set) */ | ||
| 231 | __u32 fa_cowextsize; /* CoW extsize field value (get/set) */ | ||
| 232 | }; | ||
| 233 | |||
| 234 | #define FILE_ATTR_SIZE_VER0 24 | ||
| 235 | #define FILE_ATTR_SIZE_LATEST FILE_ATTR_SIZE_VER0 | ||
| 236 | |||
| 219 | /* | 237 | /* |
| 220 | * Flags for the fsx_xflags field | 238 | * Flags for the fsx_xflags field |
| 221 | */ | 239 | */ |