| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef LIB_FDIO_VFS_H_ |
| #define LIB_FDIO_VFS_H_ |
| |
| #include <zircon/compiler.h> |
| #include <zircon/listnode.h> |
| #include <zircon/processargs.h> |
| #include <zircon/types.h> |
| |
| #include <stdio.h> |
| #include <unistd.h> // ssize_t |
| |
| __BEGIN_CDECLS |
| |
| // On Fuchsia, the Block Device is transmitted by file descriptor, rather than |
| // by path. This can prevent some racy behavior relating to FS start-up. |
| #ifdef __Fuchsia__ |
| #define FS_HANDLE_ROOT_ID PA_HND(PA_USER0, 0) |
| #define FS_HANDLE_BLOCK_DEVICE_ID PA_HND(PA_USER0, 1) |
| #endif |
| |
| // POSIX defines st_blocks to be the number of 512 byte blocks allocated |
| // to the file. The "blkcnt" field of vnattr attempts to accomplish |
| // this same goal, but by indirecting through VNATTR_BLKSIZE, we |
| // reserve the right to change this "block size unit" (which is distinct from |
| // "blksize", because POSIX) whenever we want. |
| #define VNATTR_BLKSIZE 512 |
| |
| typedef struct vnattr { |
| uint32_t valid; // mask of which bits to set for setattr |
| uint32_t mode; |
| uint64_t inode; |
| uint64_t size; |
| uint64_t blksize; // Block size for filesystem I/O |
| uint64_t blkcount; // Number of VNATTR_BLKSIZE byte blocks allocated |
| uint64_t nlink; |
| uint64_t create_time; // posix time (seconds since epoch) |
| uint64_t modify_time; // posix time |
| } vnattr_t; |
| |
| // mask that identifies what fields to set in setattr |
| #define ATTR_CTIME 0000001 |
| #define ATTR_MTIME 0000002 |
| #define ATTR_ATIME 0000004 // not yet implemented |
| |
| // bits compatible with POSIX stat |
| #define V_TYPE_MASK 0170000 |
| #define V_TYPE_SOCK 0140000 |
| #define V_TYPE_LINK 0120000 |
| #define V_TYPE_FILE 0100000 |
| #define V_TYPE_BDEV 0060000 |
| #define V_TYPE_DIR 0040000 |
| #define V_TYPE_CDEV 0020000 |
| #define V_TYPE_PIPE 0010000 |
| |
| #define V_ISUID 0004000 |
| #define V_ISGID 0002000 |
| #define V_ISVTX 0001000 |
| #define V_IRWXU 0000700 |
| #define V_IRUSR 0000400 |
| #define V_IWUSR 0000200 |
| #define V_IXUSR 0000100 |
| #define V_IRWXG 0000070 |
| #define V_IRGRP 0000040 |
| #define V_IWGRP 0000020 |
| #define V_IXGRP 0000010 |
| #define V_IRWXO 0000007 |
| #define V_IROTH 0000004 |
| #define V_IWOTH 0000002 |
| #define V_IXOTH 0000001 |
| |
| #define VTYPE_TO_DTYPE(mode) (((mode)&V_TYPE_MASK) >> 12) |
| #define DTYPE_TO_VTYPE(type) (((type)&15) << 12) |
| |
| typedef struct vdirent { |
| uint64_t ino; |
| uint8_t size; |
| uint8_t type; |
| char name[0]; |
| } __PACKED vdirent_t; |
| |
| __END_CDECLS |
| |
| #endif // LIB_FDIO_VFS_H_ |