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TOMOYO Linux Cross Reference
Linux/fs/hostfs/hostfs.h

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  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 *from, const char *to);
 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 

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