1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __UM_FS_HOSTFS 3 #define __UM_FS_HOSTFS 4 5 #include <os.h> 6 7 /* 8 * These are exactly the same definitions as in fs.h, but the names are 9 * changed so that this file can be included in both kernel and user files. 10 */ 11 12 #define HOSTFS_ATTR_MODE 1 13 #define HOSTFS_ATTR_UID 2 14 #define HOSTFS_ATTR_GID 4 15 #define HOSTFS_ATTR_SIZE 8 16 #define HOSTFS_ATTR_ATIME 16 17 #define HOSTFS_ATTR_MTIME 32 18 #define HOSTFS_ATTR_CTIME 64 19 #define HOSTFS_ATTR_ATIME_SET 128 20 #define HOSTFS_ATTR_MTIME_SET 256 21 22 /* This one is unused by hostfs. */ 23 #define HOSTFS_ATTR_FORCE 512 /* Not a change, but a change it */ 24 #define HOSTFS_ATTR_ATTR_FLAG 1024 25 26 /* 27 * If you are very careful, you'll notice that these two are missing: 28 * 29 * #define ATTR_KILL_SUID 2048 30 * #define ATTR_KILL_SGID 4096 31 * 32 * and this is because they were added in 2.5 development. 33 * Actually, they are not needed by most ->setattr() methods - they are set by 34 * callers of notify_change() to notify that the setuid/setgid bits must be 35 * dropped. 36 * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE 37 * is on, and remove the appropriate bits from attr->ia_mode (attr is a 38 * "struct iattr *"). -BlaisorBlade 39 */ 40 41 struct hostfs_iattr { 42 unsigned int ia_valid; 43 unsigned short ia_mode; 44 uid_t ia_uid; 45 gid_t ia_gid; 46 loff_t ia_size; 47 struct timespec ia_atime; 48 struct timespec ia_mtime; 49 struct timespec ia_ctime; 50 }; 51 52 struct hostfs_stat { 53 unsigned long long ino; 54 unsigned int mode; 55 unsigned int nlink; 56 unsigned int uid; 57 unsigned int gid; 58 unsigned long long size; 59 struct timespec atime, mtime, ctime; 60 unsigned int blksize; 61 unsigned long long blocks; 62 unsigned int maj; 63 unsigned int min; 64 }; 65 66 extern int stat_file(const char *path, struct hostfs_stat *p, int fd); 67 extern int access_file(char *path, int r, int w, int x); 68 extern int open_file(char *path, int r, int w, int append); 69 extern void *open_dir(char *path, int *err_out); 70 extern void seek_dir(void *stream, unsigned long long pos); 71 extern char *read_dir(void *stream, unsigned long long *pos_out, 72 unsigned long long *ino_out, int *len_out, 73 unsigned int *type_out); 74 extern void close_file(void *stream); 75 extern int replace_file(int oldfd, int fd); 76 extern void close_dir(void *stream); 77 extern int read_file(int fd, unsigned long long *offset, char *buf, int len); 78 extern int write_file(int fd, unsigned long long *offset, const char *buf, 79 int len); 80 extern int lseek_file(int fd, long long offset, int whence); 81 extern int fsync_file(int fd, int datasync); 82 extern int file_create(char *name, int mode); 83 extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd); 84 extern int make_symlink(const char *from, const char *to); 85 extern int unlink_file(const char *file); 86 extern int do_mkdir(const char *file, int mode); 87 extern int hostfs_do_rmdir(const char *file); 88 extern int do_mknod(const char *file, int mode, unsigned int major, 89 unsigned int minor); 90 extern int link_file(const char *to, const char *from); 91 extern int hostfs_do_readlink(char *file, char *buf, int size); 92 extern int rename_file(char *from, char *to); 93 extern int rename2_file(char *from, char *to, unsigned int flags); 94 extern int do_statfs(char *root, long *bsize_out, long long *blocks_out, 95 long long *bfree_out, long long *bavail_out, 96 long long *files_out, long long *ffree_out, 97 void *fsid_out, int fsid_size, long *namelen_out); 98 99 #endif 100