/* * 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);