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 <dirent.h> 16 #include <utime.h> 17 #include <sys/uio.h> 18 #include <sys/vfs.h> 19 20 #define SM_LOCAL_MODE_BITS 0600 21 #define SM_LOCAL_DIR_MODE_BITS 0700 22 23 typedef struct FsCred 24 { 25 uid_t fc_uid; 26 gid_t fc_gid; 27 mode_t fc_mode; 28 dev_t fc_rdev; 29 } FsCred; 30 31 struct xattr_operations; 32 struct FsContext; 33 struct V9fsPath; 34 35 typedef struct extended_ops { 36 int (*get_st_gen)(struct FsContext *, struct V9fsPath *, 37 mode_t, uint64_t *); 38 } extended_ops; 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 #define V9FS_SEC_MASK 0x0000003C 65 66 67 typedef struct FileOperations FileOperations; 68 /* 69 * Structure to store the various fsdev's passed through command line. 70 */ 71 typedef struct FsDriverEntry { 72 char *fsdev_id; 73 char *path; 74 int export_flags; 75 FileOperations *ops; 76 } FsDriverEntry; 77 78 typedef struct FsContext 79 { 80 uid_t uid; 81 char *fs_root; 82 int export_flags; 83 struct xattr_operations **xops; 84 struct extended_ops exops; 85 /* fs driver specific data */ 86 void *private; 87 } FsContext; 88 89 typedef struct V9fsPath { 90 uint16_t size; 91 char *data; 92 } V9fsPath; 93 94 typedef union V9fsFidOpenState V9fsFidOpenState; 95 96 void cred_init(FsCred *); 97 98 struct FileOperations 99 { 100 int (*parse_opts)(QemuOpts *, struct FsDriverEntry *); 101 int (*init)(struct FsContext *); 102 int (*lstat)(FsContext *, V9fsPath *, struct stat *); 103 ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t); 104 int (*chmod)(FsContext *, V9fsPath *, FsCred *); 105 int (*chown)(FsContext *, V9fsPath *, FsCred *); 106 int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *); 107 int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *); 108 int (*remove)(FsContext *, const char *); 109 int (*symlink)(FsContext *, const char *, V9fsPath *, 110 const char *, FsCred *); 111 int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *); 112 int (*setuid)(FsContext *, uid_t); 113 int (*close)(FsContext *, V9fsFidOpenState *); 114 int (*closedir)(FsContext *, V9fsFidOpenState *); 115 int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *); 116 int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *); 117 int (*open2)(FsContext *, V9fsPath *, const char *, 118 int, FsCred *, V9fsFidOpenState *); 119 void (*rewinddir)(FsContext *, V9fsFidOpenState *); 120 off_t (*telldir)(FsContext *, V9fsFidOpenState *); 121 int (*readdir_r)(FsContext *, V9fsFidOpenState *, 122 struct dirent *, struct dirent **); 123 void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t); 124 ssize_t (*preadv)(FsContext *, V9fsFidOpenState *, 125 const struct iovec *, int, off_t); 126 ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *, 127 const struct iovec *, int, off_t); 128 int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *); 129 int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *); 130 int (*rename)(FsContext *, const char *, const char *); 131 int (*truncate)(FsContext *, V9fsPath *, off_t); 132 int (*fsync)(FsContext *, int, V9fsFidOpenState *, int); 133 int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf); 134 ssize_t (*lgetxattr)(FsContext *, V9fsPath *, 135 const char *, void *, size_t); 136 ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t); 137 int (*lsetxattr)(FsContext *, V9fsPath *, 138 const char *, void *, size_t, int); 139 int (*lremovexattr)(FsContext *, V9fsPath *, const char *); 140 int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *); 141 int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name, 142 V9fsPath *newdir, const char *new_name); 143 int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags); 144 void *opaque; 145 }; 146 147 #endif 148