1 /* 2 * Virtio 9p 3 * 4 * Copyright IBM, Corp. 2010 5 * 6 * Authors: 7 * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 #ifndef _FILEOP_H 14 #define _FILEOP_H 15 #include <sys/types.h> 16 #include <dirent.h> 17 #include <sys/time.h> 18 #include <utime.h> 19 #include <sys/stat.h> 20 #include <sys/uio.h> 21 #include <sys/vfs.h> 22 23 #define SM_LOCAL_MODE_BITS 0600 24 #define SM_LOCAL_DIR_MODE_BITS 0700 25 26 typedef enum 27 { 28 /* 29 * Server will try to set uid/gid. 30 * On failure ignore the error. 31 */ 32 SM_NONE = 0, 33 /* 34 * uid/gid set on fileserver files 35 */ 36 SM_PASSTHROUGH = 1, 37 /* 38 * uid/gid part of xattr 39 */ 40 SM_MAPPED, 41 } SecModel; 42 43 typedef struct FsCred 44 { 45 uid_t fc_uid; 46 gid_t fc_gid; 47 mode_t fc_mode; 48 dev_t fc_rdev; 49 } FsCred; 50 51 struct xattr_operations; 52 53 /* FsContext flag values */ 54 #define PATHNAME_FSCONTEXT 0x1 55 56 typedef struct FsContext 57 { 58 int flags; 59 char *fs_root; 60 SecModel fs_sm; 61 uid_t uid; 62 struct xattr_operations **xops; 63 /* fs driver specific data */ 64 void *private; 65 } FsContext; 66 67 typedef struct V9fsPath { 68 int16_t size; 69 char *data; 70 } V9fsPath; 71 72 void cred_init(FsCred *); 73 74 typedef struct FileOperations 75 { 76 int (*init)(struct FsContext *); 77 int (*lstat)(FsContext *, V9fsPath *, struct stat *); 78 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); 79 int (*chmod)(FsContext *, V9fsPath *, FsCred *); 80 int (*chown)(FsContext *, V9fsPath *, FsCred *); 81 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); 82 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); 83 int (*remove)(FsContext *, const char *); 84 int (*symlink)(FsContext *, const char *, V9fsPath *, 85 const char *, FsCred *); 86 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); 87 int (*setuid)(FsContext *, uid_t); 88 int (*close)(FsContext *, int); 89 int (*closedir)(FsContext *, DIR *); 90 DIR *(*opendir)(FsContext *, V9fsPath *); 91 int (*open)(FsContext *, V9fsPath *, int); 92 int (*open2)(FsContext *, V9fsPath *, const char *, int, FsCred *); 93 void (*rewinddir)(FsContext *, DIR *); 94 off_t (*telldir)(FsContext *, DIR *); 95 int (*readdir_r)(FsContext *, DIR *, struct dirent *, struct dirent **); 96 void (*seekdir)(FsContext *, DIR *, off_t); 97 ssize_t (*preadv)(FsContext *, int, const struct iovec *, int, off_t); 98 ssize_t (*pwritev)(FsContext *, int, const struct iovec *, int, off_t); 99 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); 100 int (*fstat)(FsContext *, int, struct stat *); 101 int (*rename)(FsContext *, const char *, const char *); 102 int (*truncate)(FsContext *, V9fsPath *, off_t); 103 int (*fsync)(FsContext *, int, int); 104 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); 105 ssize_t (*lgetxattr)(FsContext *, V9fsPath *, 106 const char *, void *, size_t); 107 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); 108 int (*lsetxattr)(FsContext *, V9fsPath *, 109 const char *, void *, size_t, int); 110 int (*lremovexattr)(FsContext *, V9fsPath *, const char *); 111 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); 112 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, 113 V9fsPath *newdir, const char *new_name); 114 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); 115 void *opaque; 116 } FileOperations; 117 118 #endif 119