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 #include "p9array.h" 22 23 #define SM_LOCAL_MODE_BITS 0600 24 #define SM_LOCAL_DIR_MODE_BITS 0700 25 26 typedef struct FsCred { 27 uid_t fc_uid; 28 gid_t fc_gid; 29 mode_t fc_mode; 30 dev_t fc_rdev; 31 } FsCred; 32 33 typedef struct FsContext FsContext; 34 typedef struct V9fsPath V9fsPath; 35 36 typedef struct ExtendedOps { 37 int (*get_st_gen)(FsContext *, V9fsPath *, mode_t, uint64_t *); 38 } ExtendedOps; 39 40 /* export flags */ 41 #define V9FS_IMMEDIATE_WRITEOUT 0x00000001 42 #define V9FS_PATHNAME_FSCONTEXT 0x00000002 43 /* 44 * uid/gid set on fileserver files 45 */ 46 #define V9FS_SM_PASSTHROUGH 0x00000004 47 /* 48 * uid/gid part of xattr 49 */ 50 #define V9FS_SM_MAPPED 0x00000008 51 /* 52 * Server will try to set uid/gid. 53 * On failure ignore the error. 54 */ 55 #define V9FS_SM_NONE 0x00000010 56 /* 57 * uid/gid part of .virtfs_meatadata namespace 58 */ 59 #define V9FS_SM_MAPPED_FILE 0x00000020 60 #define V9FS_RDONLY 0x00000040 61 #define V9FS_PROXY_SOCK_FD 0x00000080 62 #define V9FS_PROXY_SOCK_NAME 0x00000100 63 /* 64 * multidevs option (either one of the two applies exclusively) 65 */ 66 #define V9FS_REMAP_INODES 0x00000200 67 #define V9FS_FORBID_MULTIDEVS 0x00000400 68 /* 69 * Disables certain performance warnings from being logged on host side. 70 */ 71 #define V9FS_NO_PERF_WARN 0x00000800 72 73 #define V9FS_SEC_MASK 0x0000003C 74 75 76 typedef struct FileOperations FileOperations; 77 typedef struct XattrOperations XattrOperations; 78 79 /* 80 * Structure to store the various fsdev's passed through command line. 81 */ 82 typedef struct FsDriverEntry { 83 char *fsdev_id; 84 char *path; 85 int export_flags; 86 FileOperations *ops; 87 FsThrottle fst; 88 mode_t fmode; 89 mode_t dmode; 90 } FsDriverEntry; 91 92 struct FsContext { 93 uid_t uid; 94 char *fs_root; 95 int export_flags; 96 XattrOperations **xops; 97 ExtendedOps exops; 98 FsThrottle *fst; 99 /* fs driver specific data */ 100 void *private; 101 mode_t fmode; 102 mode_t dmode; 103 }; 104 105 struct V9fsPath { 106 uint16_t size; 107 char *data; 108 }; 109 P9ARRAY_DECLARE_TYPE(V9fsPath); 110 111 typedef union V9fsFidOpenState V9fsFidOpenState; 112 113 void cred_init(FsCred *); 114 115 struct FileOperations { 116 int (*parse_opts)(QemuOpts *, FsDriverEntry *, Error **errp); 117 int (*init)(FsContext *, Error **errp); 118 void (*cleanup)(FsContext *); 119 int (*lstat)(FsContext *, V9fsPath *, struct stat *); 120 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); 121 int (*chmod)(FsContext *, V9fsPath *, FsCred *); 122 int (*chown)(FsContext *, V9fsPath *, FsCred *); 123 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); 124 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); 125 int (*remove)(FsContext *, const char *); 126 int (*symlink)(FsContext *, const char *, V9fsPath *, 127 const char *, FsCred *); 128 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); 129 int (*setuid)(FsContext *, uid_t); 130 int (*close)(FsContext *, V9fsFidOpenState *); 131 int (*closedir)(FsContext *, V9fsFidOpenState *); 132 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); 133 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); 134 int (*open2)(FsContext *, V9fsPath *, const char *, 135 int, FsCred *, V9fsFidOpenState *); 136 void (*rewinddir)(FsContext *, V9fsFidOpenState *); 137 off_t (*telldir)(FsContext *, V9fsFidOpenState *); 138 struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *); 139 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); 140 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, 141 const struct iovec *, int, off_t); 142 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, 143 const struct iovec *, int, off_t); 144 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); 145 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); 146 int (*rename)(FsContext *, const char *, const char *); 147 int (*truncate)(FsContext *, V9fsPath *, off_t); 148 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); 149 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); 150 ssize_t (*lgetxattr)(FsContext *, V9fsPath *, 151 const char *, void *, size_t); 152 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); 153 int (*lsetxattr)(FsContext *, V9fsPath *, 154 const char *, void *, size_t, int); 155 int (*lremovexattr)(FsContext *, V9fsPath *, const char *); 156 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); 157 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, 158 V9fsPath *newdir, const char *new_name); 159 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); 160 }; 161 162 #endif 163