1 /* 2 * 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 14 #ifndef FILE_OP_9P_H 15 #define FILE_OP_9P_H 16 17 #include <dirent.h> 18 #include <utime.h> 19 #include <sys/vfs.h> 20 #include "qemu-fsdev-throttle.h" 21 22 #define SM_LOCAL_MODE_BITS 0600 23 #define SM_LOCAL_DIR_MODE_BITS 0700 24 25 typedef struct FsCred 26 { 27 uid_t fc_uid; 28 gid_t fc_gid; 29 mode_t fc_mode; 30 dev_t fc_rdev; 31 } FsCred; 32 33 struct xattr_operations; 34 struct FsContext; 35 struct V9fsPath; 36 37 typedef struct extended_ops { 38 int (*get_st_gen)(struct FsContext *, struct V9fsPath *, 39 mode_t, uint64_t *); 40 } extended_ops; 41 42 /* export flags */ 43 #define V9FS_IMMEDIATE_WRITEOUT 0x00000001 44 #define V9FS_PATHNAME_FSCONTEXT 0x00000002 45 /* 46 * uid/gid set on fileserver files 47 */ 48 #define V9FS_SM_PASSTHROUGH 0x00000004 49 /* 50 * uid/gid part of xattr 51 */ 52 #define V9FS_SM_MAPPED 0x00000008 53 /* 54 * Server will try to set uid/gid. 55 * On failure ignore the error. 56 */ 57 #define V9FS_SM_NONE 0x00000010 58 /* 59 * uid/gid part of .virtfs_meatadata namespace 60 */ 61 #define V9FS_SM_MAPPED_FILE 0x00000020 62 #define V9FS_RDONLY 0x00000040 63 #define V9FS_PROXY_SOCK_FD 0x00000080 64 #define V9FS_PROXY_SOCK_NAME 0x00000100 65 66 #define V9FS_SEC_MASK 0x0000003C 67 68 69 typedef struct FileOperations FileOperations; 70 /* 71 * Structure to store the various fsdev's passed through command line. 72 */ 73 typedef struct FsDriverEntry { 74 char *fsdev_id; 75 char *path; 76 int export_flags; 77 FileOperations *ops; 78 FsThrottle fst; 79 mode_t fmode; 80 mode_t dmode; 81 } FsDriverEntry; 82 83 typedef struct FsContext 84 { 85 uid_t uid; 86 char *fs_root; 87 int export_flags; 88 struct xattr_operations **xops; 89 struct extended_ops exops; 90 FsThrottle *fst; 91 /* fs driver specific data */ 92 void *private; 93 mode_t fmode; 94 mode_t dmode; 95 } FsContext; 96 97 typedef struct V9fsPath { 98 uint16_t size; 99 char *data; 100 } V9fsPath; 101 102 typedef union V9fsFidOpenState V9fsFidOpenState; 103 104 void cred_init(FsCred *); 105 106 struct FileOperations 107 { 108 int (*parse_opts)(QemuOpts *, struct FsDriverEntry *); 109 int (*init)(struct FsContext *); 110 void (*cleanup)(struct FsContext *); 111 int (*lstat)(FsContext *, V9fsPath *, struct stat *); 112 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); 113 int (*chmod)(FsContext *, V9fsPath *, FsCred *); 114 int (*chown)(FsContext *, V9fsPath *, FsCred *); 115 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); 116 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); 117 int (*remove)(FsContext *, const char *); 118 int (*symlink)(FsContext *, const char *, V9fsPath *, 119 const char *, FsCred *); 120 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); 121 int (*setuid)(FsContext *, uid_t); 122 int (*close)(FsContext *, V9fsFidOpenState *); 123 int (*closedir)(FsContext *, V9fsFidOpenState *); 124 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); 125 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); 126 int (*open2)(FsContext *, V9fsPath *, const char *, 127 int, FsCred *, V9fsFidOpenState *); 128 void (*rewinddir)(FsContext *, V9fsFidOpenState *); 129 off_t (*telldir)(FsContext *, V9fsFidOpenState *); 130 struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *); 131 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); 132 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, 133 const struct iovec *, int, off_t); 134 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, 135 const struct iovec *, int, off_t); 136 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); 137 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); 138 int (*rename)(FsContext *, const char *, const char *); 139 int (*truncate)(FsContext *, V9fsPath *, off_t); 140 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); 141 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); 142 ssize_t (*lgetxattr)(FsContext *, V9fsPath *, 143 const char *, void *, size_t); 144 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); 145 int (*lsetxattr)(FsContext *, V9fsPath *, 146 const char *, void *, size_t, int); 147 int (*lremovexattr)(FsContext *, V9fsPath *, const char *); 148 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); 149 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, 150 V9fsPath *newdir, const char *new_name); 151 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); 152 void *opaque; 153 }; 154 155 #endif 156