| /* |
| * Filesystem abstraction |
| * |
| * Copyright (c) 2016 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| /* FSQID.type */ |
| #define P9_QTDIR 0x80 |
| #define P9_QTAPPEND 0x40 |
| #define P9_QTEXCL 0x20 |
| #define P9_QTMOUNT 0x10 |
| #define P9_QTAUTH 0x08 |
| #define P9_QTTMP 0x04 |
| #define P9_QTSYMLINK 0x02 |
| #define P9_QTLINK 0x01 |
| #define P9_QTFILE 0x00 |
| |
| /* mode bits */ |
| #define P9_S_IRWXUGO 0x01FF |
| #define P9_S_ISVTX 0x0200 |
| #define P9_S_ISGID 0x0400 |
| #define P9_S_ISUID 0x0800 |
| |
| #define P9_S_IFMT 0xF000 |
| #define P9_S_IFIFO 0x1000 |
| #define P9_S_IFCHR 0x2000 |
| #define P9_S_IFDIR 0x4000 |
| #define P9_S_IFBLK 0x6000 |
| #define P9_S_IFREG 0x8000 |
| #define P9_S_IFLNK 0xA000 |
| #define P9_S_IFSOCK 0xC000 |
| |
| /* flags for lopen()/lcreate() */ |
| #define P9_O_RDONLY 0x00000000 |
| #define P9_O_WRONLY 0x00000001 |
| #define P9_O_RDWR 0x00000002 |
| #define P9_O_NOACCESS 0x00000003 |
| #define P9_O_CREAT 0x00000040 |
| #define P9_O_EXCL 0x00000080 |
| #define P9_O_NOCTTY 0x00000100 |
| #define P9_O_TRUNC 0x00000200 |
| #define P9_O_APPEND 0x00000400 |
| #define P9_O_NONBLOCK 0x00000800 |
| #define P9_O_DSYNC 0x00001000 |
| #define P9_O_FASYNC 0x00002000 |
| #define P9_O_DIRECT 0x00004000 |
| #define P9_O_LARGEFILE 0x00008000 |
| #define P9_O_DIRECTORY 0x00010000 |
| #define P9_O_NOFOLLOW 0x00020000 |
| #define P9_O_NOATIME 0x00040000 |
| #define P9_O_CLOEXEC 0x00080000 |
| #define P9_O_SYNC 0x00100000 |
| |
| /* for fs_setattr() */ |
| #define P9_SETATTR_MODE 0x00000001 |
| #define P9_SETATTR_UID 0x00000002 |
| #define P9_SETATTR_GID 0x00000004 |
| #define P9_SETATTR_SIZE 0x00000008 |
| #define P9_SETATTR_ATIME 0x00000010 |
| #define P9_SETATTR_MTIME 0x00000020 |
| #define P9_SETATTR_CTIME 0x00000040 |
| #define P9_SETATTR_ATIME_SET 0x00000080 |
| #define P9_SETATTR_MTIME_SET 0x00000100 |
| |
| #define P9_EPERM 1 |
| #define P9_ENOENT 2 |
| #define P9_EIO 5 |
| #define P9_EEXIST 17 |
| #define P9_ENOTDIR 20 |
| #define P9_EINVAL 22 |
| #define P9_ENOSPC 28 |
| #define P9_ENOTEMPTY 39 |
| #define P9_EPROTO 71 |
| #define P9_ENOTSUP 524 |
| |
| typedef struct FSDevice FSDevice; |
| typedef struct FSFile FSFile; |
| |
| typedef struct { |
| uint32_t f_bsize; |
| uint64_t f_blocks; |
| uint64_t f_bfree; |
| uint64_t f_bavail; |
| uint64_t f_files; |
| uint64_t f_ffree; |
| } FSStatFS; |
| |
| typedef struct { |
| uint8_t type; /* P9_IFx */ |
| uint32_t version; |
| uint64_t path; |
| } FSQID; |
| |
| typedef struct { |
| FSQID qid; |
| uint32_t st_mode; |
| uint32_t st_uid; |
| uint32_t st_gid; |
| uint64_t st_nlink; |
| uint64_t st_rdev; |
| uint64_t st_size; |
| uint64_t st_blksize; |
| uint64_t st_blocks; |
| uint64_t st_atime_sec; |
| uint32_t st_atime_nsec; |
| uint64_t st_mtime_sec; |
| uint32_t st_mtime_nsec; |
| uint64_t st_ctime_sec; |
| uint32_t st_ctime_nsec; |
| } FSStat; |
| |
| #define P9_LOCK_TYPE_RDLCK 0 |
| #define P9_LOCK_TYPE_WRLCK 1 |
| #define P9_LOCK_TYPE_UNLCK 2 |
| |
| #define P9_LOCK_FLAGS_BLOCK 1 |
| #define P9_LOCK_FLAGS_RECLAIM 2 |
| |
| #define P9_LOCK_SUCCESS 0 |
| #define P9_LOCK_BLOCKED 1 |
| #define P9_LOCK_ERROR 2 |
| #define P9_LOCK_GRACE 3 |
| |
| #define FSCMD_NAME ".fscmd" |
| |
| typedef struct { |
| uint8_t type; |
| uint32_t flags; |
| uint64_t start; |
| uint64_t length; |
| uint32_t proc_id; |
| char *client_id; |
| } FSLock; |
| |
| typedef void FSOpenCompletionFunc(FSDevice *fs, FSQID *qid, int err, |
| void *opaque); |
| |
| struct FSDevice { |
| void (*fs_end)(FSDevice *s); |
| void (*fs_delete)(FSDevice *s, FSFile *f); |
| void (*fs_statfs)(FSDevice *fs, FSStatFS *st); |
| int (*fs_attach)(FSDevice *fs, FSFile **pf, FSQID *qid, uint32_t uid, |
| const char *uname, const char *aname); |
| int (*fs_walk)(FSDevice *fs, FSFile **pf, FSQID *qids, |
| FSFile *f, int n, char **names); |
| int (*fs_mkdir)(FSDevice *fs, FSQID *qid, FSFile *f, |
| const char *name, uint32_t mode, uint32_t gid); |
| int (*fs_open)(FSDevice *fs, FSQID *qid, FSFile *f, uint32_t flags, |
| FSOpenCompletionFunc *cb, void *opaque); |
| int (*fs_create)(FSDevice *fs, FSQID *qid, FSFile *f, const char *name, |
| uint32_t flags, uint32_t mode, uint32_t gid); |
| int (*fs_stat)(FSDevice *fs, FSFile *f, FSStat *st); |
| int (*fs_setattr)(FSDevice *fs, FSFile *f, uint32_t mask, |
| uint32_t mode, uint32_t uid, uint32_t gid, |
| uint64_t size, uint64_t atime_sec, uint64_t atime_nsec, |
| uint64_t mtime_sec, uint64_t mtime_nsec); |
| void (*fs_close)(FSDevice *fs, FSFile *f); |
| int (*fs_readdir)(FSDevice *fs, FSFile *f, uint64_t offset, |
| uint8_t *buf, int count); |
| int (*fs_read)(FSDevice *fs, FSFile *f, uint64_t offset, |
| uint8_t *buf, int count); |
| int (*fs_write)(FSDevice *fs, FSFile *f, uint64_t offset, |
| const uint8_t *buf, int count); |
| int (*fs_link)(FSDevice *fs, FSFile *df, FSFile *f, const char *name); |
| int (*fs_symlink)(FSDevice *fs, FSQID *qid, |
| FSFile *f, const char *name, const char *symgt, uint32_t gid); |
| int (*fs_mknod)(FSDevice *fs, FSQID *qid, |
| FSFile *f, const char *name, uint32_t mode, uint32_t major, |
| uint32_t minor, uint32_t gid); |
| int (*fs_readlink)(FSDevice *fs, char *buf, int buf_size, FSFile *f); |
| int (*fs_renameat)(FSDevice *fs, FSFile *f, const char *name, |
| FSFile *new_f, const char *new_name); |
| int (*fs_unlinkat)(FSDevice *fs, FSFile *f, const char *name); |
| int (*fs_lock)(FSDevice *fs, FSFile *f, const FSLock *lock); |
| int (*fs_getlock)(FSDevice *fs, FSFile *f, FSLock *lock); |
| }; |
| |
| FSDevice *fs_disk_init(const char *root_path); |
| FSDevice *fs_mem_init(void); |
| FSDevice *fs_net_init(const char *url, void (*start)(void *opaque), void *opaque); |
| void fs_net_set_pwd(FSDevice *fs, const char *pwd); |
| #ifdef EMSCRIPTEN |
| void fs_import_file(const char *filename, uint8_t *buf, int buf_len); |
| #endif |
| void fs_export_file(const char *filename, |
| const uint8_t *buf, int buf_len); |
| void fs_end(FSDevice *fs); |
| void fs_dump_cache_load(FSDevice *fs1, const char *filename); |
| |
| FSFile *fs_dup(FSDevice *fs, FSFile *f); |
| FSFile *fs_walk_path1(FSDevice *fs, FSFile *f, const char *path, |
| char **pname); |
| FSFile *fs_walk_path(FSDevice *fs, FSFile *f, const char *path); |