1#ifndef __UM_FS_HOSTFS 2#define __UM_FS_HOSTFS 3 4#include "os.h" 5 6/* 7 * These are exactly the same definitions as in fs.h, but the names are 8 * changed so that this file can be included in both kernel and user files. 9 */ 10 11#define HOSTFS_ATTR_MODE 1 12#define HOSTFS_ATTR_UID 2 13#define HOSTFS_ATTR_GID 4 14#define HOSTFS_ATTR_SIZE 8 15#define HOSTFS_ATTR_ATIME 16 16#define HOSTFS_ATTR_MTIME 32 17#define HOSTFS_ATTR_CTIME 64 18#define HOSTFS_ATTR_ATIME_SET 128 19#define HOSTFS_ATTR_MTIME_SET 256 20 21/* These two are unused by hostfs. */ 22#define HOSTFS_ATTR_FORCE 512 /* Not a change, but a change it */ 23#define HOSTFS_ATTR_ATTR_FLAG 1024 24 25/* 26 * If you are very careful, you'll notice that these two are missing: 27 * 28 * #define ATTR_KILL_SUID 2048 29 * #define ATTR_KILL_SGID 4096 30 * 31 * and this is because they were added in 2.5 development in this patch: 32 * 33 * http://linux.bkbits.net:8080/linux-2.5/ 34 * cset@3caf4a12k4XgDzK7wyK-TGpSZ9u2Ww?nav=index.html 35 * |src/.|src/include|src/include/linux|related/include/linux/fs.h 36 * 37 * Actually, they are not needed by most ->setattr() methods - they are set by 38 * callers of notify_change() to notify that the setuid/setgid bits must be 39 * dropped. 40 * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE 41 * is on, and remove the appropriate bits from attr->ia_mode (attr is a 42 * "struct iattr *"). -BlaisorBlade 43 */ 44 45struct hostfs_iattr { 46 unsigned int ia_valid; 47 mode_t ia_mode; 48 uid_t ia_uid; 49 gid_t ia_gid; 50 loff_t ia_size; 51 struct timespec ia_atime; 52 struct timespec ia_mtime; 53 struct timespec ia_ctime; 54}; 55 56struct hostfs_stat { 57 unsigned long long ino; 58 unsigned int mode; 59 unsigned int nlink; 60 unsigned int uid; 61 unsigned int gid; 62 unsigned long long size; 63 struct timespec atime, mtime, ctime; 64 unsigned int blksize; 65 unsigned long long blocks; 66 unsigned int maj; 67 unsigned int min; 68}; 69 70extern int stat_file(const char *path, struct hostfs_stat *p, int fd); 71extern int access_file(char *path, int r, int w, int x); 72extern int open_file(char *path, int r, int w, int append); 73extern void *open_dir(char *path, int *err_out); 74extern char *read_dir(void *stream, unsigned long long *pos, 75 unsigned long long *ino_out, int *len_out); 76extern void close_file(void *stream); 77extern int replace_file(int oldfd, int fd); 78extern void close_dir(void *stream); 79extern int read_file(int fd, unsigned long long *offset, char *buf, int len); 80extern int write_file(int fd, unsigned long long *offset, const char *buf, 81 int len); 82extern int lseek_file(int fd, long long offset, int whence); 83extern int fsync_file(int fd, int datasync); 84extern int file_create(char *name, int ur, int uw, int ux, int gr, 85 int gw, int gx, int or, int ow, int ox); 86extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd); 87extern int make_symlink(const char *from, const char *to); 88extern int unlink_file(const char *file); 89extern int do_mkdir(const char *file, int mode); 90extern int do_rmdir(const char *file); 91extern int do_mknod(const char *file, int mode, unsigned int major, 92 unsigned int minor); 93extern int link_file(const char *from, const char *to); 94extern int hostfs_do_readlink(char *file, char *buf, int size); 95extern int rename_file(char *from, char *to); 96extern int do_statfs(char *root, long *bsize_out, long long *blocks_out, 97 long long *bfree_out, long long *bavail_out, 98 long long *files_out, long long *ffree_out, 99 void *fsid_out, int fsid_size, long *namelen_out); 100 101#endif 102