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 #define V9FS_SEC_MASK 0x0000003C 69 70 71 typedef struct FileOperations FileOperations; 72 typedef struct XattrOperations XattrOperations; 73 74 /* 75 * Structure to store the various fsdev's passed through command line. 76 */ 77 typedef struct FsDriverEntry { 78 char *fsdev_id; 79 char *path; 80 int export_flags; 81 FileOperations *ops; 82 FsThrottle fst; 83 mode_t fmode; 84 mode_t dmode; 85 } FsDriverEntry; 86 87 struct FsContext { 88 uid_t uid; 89 char *fs_root; 90 int export_flags; 91 XattrOperations **xops; 92 ExtendedOps exops; 93 FsThrottle *fst; 94 /* fs driver specific data */ 95 void *private; 96 mode_t fmode; 97 mode_t dmode; 98 }; 99 100 struct V9fsPath { 101 uint16_t size; 102 char *data; 103 }; 104 105 typedef union V9fsFidOpenState V9fsFidOpenState; 106 107 void cred_init(FsCred *); 108 109 struct FileOperations 110 { 111 int (*parse_opts)(QemuOpts *, FsDriverEntry *, Error **errp); 112 int (*init)(FsContext *, Error **errp); 113 void (*cleanup)(FsContext *); 114 int (*lstat)(FsContext *, V9fsPath *, struct stat *); 115 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); 116 int (*chmod)(FsContext *, V9fsPath *, FsCred *); 117 int (*chown)(FsContext *, V9fsPath *, FsCred *); 118 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); 119 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); 120 int (*remove)(FsContext *, const char *); 121 int (*symlink)(FsContext *, const char *, V9fsPath *, 122 const char *, FsCred *); 123 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); 124 int (*setuid)(FsContext *, uid_t); 125 int (*close)(FsContext *, V9fsFidOpenState *); 126 int (*closedir)(FsContext *, V9fsFidOpenState *); 127 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); 128 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); 129 int (*open2)(FsContext *, V9fsPath *, const char *, 130 int, FsCred *, V9fsFidOpenState *); 131 void (*rewinddir)(FsContext *, V9fsFidOpenState *); 132 off_t (*telldir)(FsContext *, V9fsFidOpenState *); 133 struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *); 134 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); 135 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, 136 const struct iovec *, int, off_t); 137 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, 138 const struct iovec *, int, off_t); 139 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); 140 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); 141 int (*rename)(FsContext *, const char *, const char *); 142 int (*truncate)(FsContext *, V9fsPath *, off_t); 143 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); 144 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); 145 ssize_t (*lgetxattr)(FsContext *, V9fsPath *, 146 const char *, void *, size_t); 147 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); 148 int (*lsetxattr)(FsContext *, V9fsPath *, 149 const char *, void *, size_t, int); 150 int (*lremovexattr)(FsContext *, V9fsPath *, const char *); 151 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); 152 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, 153 V9fsPath *newdir, const char *new_name); 154 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); 155 }; 156 157 #endif 158