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 uid_t fc_uid; 27 gid_t fc_gid; 28 mode_t fc_mode; 29 dev_t fc_rdev; 30 } FsCred; 31 32 typedef struct FsContext FsContext; 33 typedef struct V9fsPath V9fsPath; 34 35 typedef struct ExtendedOps { 36 int (*get_st_gen)(FsContext *, V9fsPath *, mode_t, uint64_t *); 37 } ExtendedOps; 38 39 /* export flags */ 40 #define V9FS_IMMEDIATE_WRITEOUT 0x00000001 41 #define V9FS_PATHNAME_FSCONTEXT 0x00000002 42 /* 43 * uid/gid set on fileserver files 44 */ 45 #define V9FS_SM_PASSTHROUGH 0x00000004 46 /* 47 * uid/gid part of xattr 48 */ 49 #define V9FS_SM_MAPPED 0x00000008 50 /* 51 * Server will try to set uid/gid. 52 * On failure ignore the error. 53 */ 54 #define V9FS_SM_NONE 0x00000010 55 /* 56 * uid/gid part of .virtfs_meatadata namespace 57 */ 58 #define V9FS_SM_MAPPED_FILE 0x00000020 59 #define V9FS_RDONLY 0x00000040 60 #define V9FS_PROXY_SOCK_FD 0x00000080 61 #define V9FS_PROXY_SOCK_NAME 0x00000100 62 /* 63 * multidevs option (either one of the two applies exclusively) 64 */ 65 #define V9FS_REMAP_INODES 0x00000200 66 #define V9FS_FORBID_MULTIDEVS 0x00000400 67 /* 68 * Disables certain performance warnings from being logged on host side. 69 */ 70 #define V9FS_NO_PERF_WARN 0x00000800 71 72 #define V9FS_SEC_MASK 0x0000003C 73 74 75 typedef struct FileOperations FileOperations; 76 typedef struct XattrOperations XattrOperations; 77 78 /* 79 * Structure to store the various fsdev's passed through command line. 80 */ 81 typedef struct FsDriverEntry { 82 char *fsdev_id; 83 char *path; 84 int export_flags; 85 FileOperations *ops; 86 FsThrottle fst; 87 mode_t fmode; 88 mode_t dmode; 89 } FsDriverEntry; 90 91 struct FsContext { 92 uid_t uid; 93 char *fs_root; 94 int export_flags; 95 XattrOperations **xops; 96 ExtendedOps exops; 97 FsThrottle *fst; 98 /* fs driver specific data */ 99 void *private; 100 mode_t fmode; 101 mode_t dmode; 102 }; 103 104 struct V9fsPath { 105 uint16_t size; 106 char *data; 107 }; 108 109 typedef union V9fsFidOpenState V9fsFidOpenState; 110 111 void cred_init(FsCred *); 112 113 struct FileOperations 114 { 115 int (*parse_opts)(QemuOpts *, FsDriverEntry *, Error **errp); 116 int (*init)(FsContext *, Error **errp); 117 void (*cleanup)(FsContext *); 118 int (*lstat)(FsContext *, V9fsPath *, struct stat *); 119 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); 120 int (*chmod)(FsContext *, V9fsPath *, FsCred *); 121 int (*chown)(FsContext *, V9fsPath *, FsCred *); 122 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); 123 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); 124 int (*remove)(FsContext *, const char *); 125 int (*symlink)(FsContext *, const char *, V9fsPath *, 126 const char *, FsCred *); 127 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); 128 int (*setuid)(FsContext *, uid_t); 129 int (*close)(FsContext *, V9fsFidOpenState *); 130 int (*closedir)(FsContext *, V9fsFidOpenState *); 131 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); 132 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); 133 int (*open2)(FsContext *, V9fsPath *, const char *, 134 int, FsCred *, V9fsFidOpenState *); 135 void (*rewinddir)(FsContext *, V9fsFidOpenState *); 136 off_t (*telldir)(FsContext *, V9fsFidOpenState *); 137 struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *); 138 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); 139 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, 140 const struct iovec *, int, off_t); 141 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, 142 const struct iovec *, int, off_t); 143 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); 144 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); 145 int (*rename)(FsContext *, const char *, const char *); 146 int (*truncate)(FsContext *, V9fsPath *, off_t); 147 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); 148 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); 149 ssize_t (*lgetxattr)(FsContext *, V9fsPath *, 150 const char *, void *, size_t); 151 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); 152 int (*lsetxattr)(FsContext *, V9fsPath *, 153 const char *, void *, size_t, int); 154 int (*lremovexattr)(FsContext *, V9fsPath *, const char *); 155 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); 156 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, 157 V9fsPath *newdir, const char *new_name); 158 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); 159 }; 160 161 #endif 162