1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __UM_FS_HOSTFS 3*4882a593Smuzhiyun #define __UM_FS_HOSTFS 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <os.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * These are exactly the same definitions as in fs.h, but the names are 9*4882a593Smuzhiyun * changed so that this file can be included in both kernel and user files. 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #define HOSTFS_ATTR_MODE 1 13*4882a593Smuzhiyun #define HOSTFS_ATTR_UID 2 14*4882a593Smuzhiyun #define HOSTFS_ATTR_GID 4 15*4882a593Smuzhiyun #define HOSTFS_ATTR_SIZE 8 16*4882a593Smuzhiyun #define HOSTFS_ATTR_ATIME 16 17*4882a593Smuzhiyun #define HOSTFS_ATTR_MTIME 32 18*4882a593Smuzhiyun #define HOSTFS_ATTR_CTIME 64 19*4882a593Smuzhiyun #define HOSTFS_ATTR_ATIME_SET 128 20*4882a593Smuzhiyun #define HOSTFS_ATTR_MTIME_SET 256 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun /* This one is unused by hostfs. */ 23*4882a593Smuzhiyun #define HOSTFS_ATTR_FORCE 512 /* Not a change, but a change it */ 24*4882a593Smuzhiyun #define HOSTFS_ATTR_ATTR_FLAG 1024 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun /* 27*4882a593Smuzhiyun * If you are very careful, you'll notice that these two are missing: 28*4882a593Smuzhiyun * 29*4882a593Smuzhiyun * #define ATTR_KILL_SUID 2048 30*4882a593Smuzhiyun * #define ATTR_KILL_SGID 4096 31*4882a593Smuzhiyun * 32*4882a593Smuzhiyun * and this is because they were added in 2.5 development. 33*4882a593Smuzhiyun * Actually, they are not needed by most ->setattr() methods - they are set by 34*4882a593Smuzhiyun * callers of notify_change() to notify that the setuid/setgid bits must be 35*4882a593Smuzhiyun * dropped. 36*4882a593Smuzhiyun * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE 37*4882a593Smuzhiyun * is on, and remove the appropriate bits from attr->ia_mode (attr is a 38*4882a593Smuzhiyun * "struct iattr *"). -BlaisorBlade 39*4882a593Smuzhiyun */ 40*4882a593Smuzhiyun struct hostfs_timespec { 41*4882a593Smuzhiyun long long tv_sec; 42*4882a593Smuzhiyun long long tv_nsec; 43*4882a593Smuzhiyun }; 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun struct hostfs_iattr { 46*4882a593Smuzhiyun unsigned int ia_valid; 47*4882a593Smuzhiyun unsigned short ia_mode; 48*4882a593Smuzhiyun uid_t ia_uid; 49*4882a593Smuzhiyun gid_t ia_gid; 50*4882a593Smuzhiyun loff_t ia_size; 51*4882a593Smuzhiyun struct hostfs_timespec ia_atime; 52*4882a593Smuzhiyun struct hostfs_timespec ia_mtime; 53*4882a593Smuzhiyun struct hostfs_timespec ia_ctime; 54*4882a593Smuzhiyun }; 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun struct hostfs_stat { 57*4882a593Smuzhiyun unsigned long long ino; 58*4882a593Smuzhiyun unsigned int mode; 59*4882a593Smuzhiyun unsigned int nlink; 60*4882a593Smuzhiyun unsigned int uid; 61*4882a593Smuzhiyun unsigned int gid; 62*4882a593Smuzhiyun unsigned long long size; 63*4882a593Smuzhiyun struct hostfs_timespec atime, mtime, ctime; 64*4882a593Smuzhiyun unsigned int blksize; 65*4882a593Smuzhiyun unsigned long long blocks; 66*4882a593Smuzhiyun unsigned int maj; 67*4882a593Smuzhiyun unsigned int min; 68*4882a593Smuzhiyun }; 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun extern int stat_file(const char *path, struct hostfs_stat *p, int fd); 71*4882a593Smuzhiyun extern int access_file(char *path, int r, int w, int x); 72*4882a593Smuzhiyun extern int open_file(char *path, int r, int w, int append); 73*4882a593Smuzhiyun extern void *open_dir(char *path, int *err_out); 74*4882a593Smuzhiyun extern void seek_dir(void *stream, unsigned long long pos); 75*4882a593Smuzhiyun extern char *read_dir(void *stream, unsigned long long *pos_out, 76*4882a593Smuzhiyun unsigned long long *ino_out, int *len_out, 77*4882a593Smuzhiyun unsigned int *type_out); 78*4882a593Smuzhiyun extern void close_file(void *stream); 79*4882a593Smuzhiyun extern int replace_file(int oldfd, int fd); 80*4882a593Smuzhiyun extern void close_dir(void *stream); 81*4882a593Smuzhiyun extern int read_file(int fd, unsigned long long *offset, char *buf, int len); 82*4882a593Smuzhiyun extern int write_file(int fd, unsigned long long *offset, const char *buf, 83*4882a593Smuzhiyun int len); 84*4882a593Smuzhiyun extern int lseek_file(int fd, long long offset, int whence); 85*4882a593Smuzhiyun extern int fsync_file(int fd, int datasync); 86*4882a593Smuzhiyun extern int file_create(char *name, int mode); 87*4882a593Smuzhiyun extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd); 88*4882a593Smuzhiyun extern int make_symlink(const char *from, const char *to); 89*4882a593Smuzhiyun extern int unlink_file(const char *file); 90*4882a593Smuzhiyun extern int do_mkdir(const char *file, int mode); 91*4882a593Smuzhiyun extern int hostfs_do_rmdir(const char *file); 92*4882a593Smuzhiyun extern int do_mknod(const char *file, int mode, unsigned int major, 93*4882a593Smuzhiyun unsigned int minor); 94*4882a593Smuzhiyun extern int link_file(const char *to, const char *from); 95*4882a593Smuzhiyun extern int hostfs_do_readlink(char *file, char *buf, int size); 96*4882a593Smuzhiyun extern int rename_file(char *from, char *to); 97*4882a593Smuzhiyun extern int rename2_file(char *from, char *to, unsigned int flags); 98*4882a593Smuzhiyun extern int do_statfs(char *root, long *bsize_out, long long *blocks_out, 99*4882a593Smuzhiyun long long *bfree_out, long long *bavail_out, 100*4882a593Smuzhiyun long long *files_out, long long *ffree_out, 101*4882a593Smuzhiyun void *fsid_out, int fsid_size, long *namelen_out); 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun #endif 104