424 lines
12 KiB
C
424 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2017-2018 HUAWEI, Inc.
|
|
* https://www.huawei.com/
|
|
* Copyright (C) 2021, Alibaba Cloud
|
|
*/
|
|
|
|
#ifndef __EROFS_INTERNAL_H
|
|
#define __EROFS_INTERNAL_H
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h> // MUST FIRST
|
|
#include <sys/condvar.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include "erofs_fs.h"
|
|
|
|
MALLOC_DECLARE(M_EROFS);
|
|
|
|
struct cdev;
|
|
struct g_consumer;
|
|
struct erofs_device_info;
|
|
|
|
/* EROFS_SUPER_MAGIC_V1 to represent the whole file system */
|
|
#define EROFS_SUPER_MAGIC EROFS_SUPER_MAGIC_V1
|
|
|
|
typedef uint64_t erofs_nid_t;
|
|
typedef uint64_t erofs_off_t;
|
|
typedef uint64_t erofs_blk_t;
|
|
|
|
#define EROFS_MOUNT_POSIX_ACL 0x00000020
|
|
|
|
#define clear_opt(opt, option) ((opt)->mount_opt &= ~EROFS_MOUNT_##option)
|
|
#define set_opt(opt, option) ((opt)->mount_opt |= EROFS_MOUNT_##option)
|
|
#define test_opt(opt, option) ((opt)->mount_opt & EROFS_MOUNT_##option)
|
|
|
|
struct erofs_sb_info_opts {
|
|
unsigned int mount_opt;
|
|
};
|
|
|
|
struct erofs_device_info {
|
|
struct vnode *devvp;
|
|
struct cdev *dev;
|
|
struct g_consumer *cp;
|
|
uint64_t mediasize;
|
|
uint32_t sectorsize;
|
|
|
|
erofs_blk_t blocks;
|
|
erofs_blk_t uniaddr;
|
|
};
|
|
|
|
struct erofs_xattr_prefix_item {
|
|
uint8_t base_index;
|
|
uint8_t infix_len;
|
|
char *infix;
|
|
};
|
|
|
|
struct erofs_map_blocks {
|
|
erofs_off_t m_pa, m_la;
|
|
uint64_t m_plen, m_llen;
|
|
|
|
unsigned short m_deviceid;
|
|
uint8_t m_algorithmformat;
|
|
unsigned int m_flags;
|
|
};
|
|
|
|
enum erofs_zextent_cache_state {
|
|
EROFS_ZCACHE_EMPTY,
|
|
EROFS_ZCACHE_INFLIGHT,
|
|
EROFS_ZCACHE_READY,
|
|
EROFS_ZCACHE_FAILED,
|
|
};
|
|
|
|
struct erofs_zextent_cache_metrics {
|
|
uint64_t hits;
|
|
uint64_t misses;
|
|
uint64_t bypasses;
|
|
uint64_t evictions;
|
|
uint64_t reclaims;
|
|
size_t resident_bytes;
|
|
};
|
|
|
|
struct erofs_zextent_cache {
|
|
struct erofs_map_blocks map;
|
|
void *data;
|
|
erofs_nid_t nid;
|
|
size_t decoded_size;
|
|
size_t charged_bytes;
|
|
size_t budget_bytes;
|
|
uint64_t minimum_decode_work;
|
|
struct erofs_zextent_cache_metrics metrics[Z_EROFS_COMPRESSION_MAX];
|
|
unsigned int waiters;
|
|
int error;
|
|
enum erofs_zextent_cache_state state;
|
|
struct cv cv;
|
|
bool closing;
|
|
};
|
|
|
|
enum erofs_xattr_cache_state {
|
|
EROFS_XATTR_CACHE_EMPTY,
|
|
EROFS_XATTR_CACHE_INFLIGHT,
|
|
EROFS_XATTR_CACHE_READY,
|
|
EROFS_XATTR_CACHE_FAILED,
|
|
};
|
|
|
|
struct erofs_xattr_cache {
|
|
struct mtx lock;
|
|
struct cv cv;
|
|
void *data;
|
|
size_t size;
|
|
size_t charged_bytes;
|
|
unsigned int waiters;
|
|
int error;
|
|
enum erofs_xattr_cache_state state;
|
|
bool closing;
|
|
bool initialized;
|
|
};
|
|
|
|
#define EROFS_STREAM_CTX_WRAPPER_SIZE 256
|
|
|
|
struct erofs_stream_ctx;
|
|
typedef int erofs_stream_ctx_init_t(struct erofs_stream_ctx *ctx);
|
|
typedef void erofs_stream_ctx_fini_t(struct erofs_stream_ctx *ctx);
|
|
|
|
struct erofs_stream_ctx {
|
|
STAILQ_ENTRY(erofs_stream_ctx) link;
|
|
struct erofs_sb_info *sbi;
|
|
erofs_stream_ctx_fini_t *fini;
|
|
size_t charged_bytes;
|
|
uint8_t algorithm;
|
|
bool cached;
|
|
bool allocation_failed;
|
|
};
|
|
|
|
STAILQ_HEAD(erofs_stream_ctx_head, erofs_stream_ctx);
|
|
|
|
struct erofs_stream_pool_codec {
|
|
struct erofs_stream_ctx_head idle;
|
|
unsigned int contexts;
|
|
unsigned int cached;
|
|
unsigned int borrowed;
|
|
unsigned int idle_count;
|
|
};
|
|
|
|
struct erofs_stream_pool {
|
|
struct erofs_stream_pool_codec codec[Z_EROFS_COMPRESSION_MAX];
|
|
size_t resident_bytes;
|
|
struct cv cv;
|
|
bool closing;
|
|
};
|
|
|
|
struct erofs_sb_info {
|
|
struct mount *mnt;
|
|
struct erofs_device_info dif0;
|
|
|
|
uint32_t block_size;
|
|
uint32_t sb_size;
|
|
uint8_t blkszbits;
|
|
uint32_t meta_blkaddr;
|
|
uint32_t xattr_blkaddr;
|
|
uint32_t xattr_prefix_start;
|
|
uint8_t xattr_prefix_count;
|
|
uint8_t xattr_filter_reserved;
|
|
erofs_nid_t packed_nid;
|
|
erofs_nid_t metabox_nid;
|
|
struct erofs_inode *metabox_en;
|
|
struct erofs_inode *packed_inode;
|
|
struct erofs_xattr_prefix_item *xattr_prefixes;
|
|
erofs_blk_t blocks;
|
|
uint64_t inos;
|
|
erofs_nid_t root_nid;
|
|
int64_t epoch;
|
|
uint32_t fixed_nsec;
|
|
uint32_t generation_seed;
|
|
uint32_t feature_compat;
|
|
uint32_t feature_incompat;
|
|
char volume_name[17];
|
|
|
|
struct erofs_sb_info_opts opt;
|
|
uint16_t available_compr_algs;
|
|
uint32_t lzma_dict_size;
|
|
uint8_t deflate_windowbits;
|
|
uint8_t zstd_windowlog;
|
|
|
|
/* Device table */
|
|
uint16_t extra_devices;
|
|
uint16_t device_id_mask;
|
|
bool flatdev;
|
|
erofs_blk_t total_blocks;
|
|
erofs_blk_t flatdev_blocks;
|
|
struct erofs_device_info *devs;
|
|
struct mtx z_extent_cache_lock;
|
|
struct erofs_zextent_cache z_extent_cache;
|
|
LIST_ENTRY(erofs_sb_info) z_extent_cache_link;
|
|
bool z_extent_cache_initialized;
|
|
struct erofs_stream_pool stream_pool;
|
|
LIST_ENTRY(erofs_sb_info) stream_pool_link;
|
|
bool stream_pool_initialized;
|
|
volatile u_long xattr_cache_resident;
|
|
};
|
|
|
|
#define MTOE(mp) ((struct erofs_sb_info *)(mp)->mnt_data)
|
|
|
|
#define EROFS_FEATURE_FUNCS(name, compat, feature) \
|
|
static inline bool erofs_sb_has_##name(const struct erofs_sb_info *sbi) \
|
|
{ \
|
|
return ( \
|
|
(sbi->feature_##compat & EROFS_FEATURE_##feature) != 0); \
|
|
}
|
|
|
|
EROFS_FEATURE_FUNCS(lz4_0padding, incompat, INCOMPAT_LZ4_0PADDING)
|
|
EROFS_FEATURE_FUNCS(compr_cfgs, incompat, INCOMPAT_COMPR_CFGS)
|
|
EROFS_FEATURE_FUNCS(big_pcluster, incompat, INCOMPAT_BIG_PCLUSTER)
|
|
EROFS_FEATURE_FUNCS(chunked_file, incompat, INCOMPAT_CHUNKED_FILE)
|
|
EROFS_FEATURE_FUNCS(device_table, incompat, INCOMPAT_DEVICE_TABLE)
|
|
EROFS_FEATURE_FUNCS(compr_head2, incompat, INCOMPAT_COMPR_HEAD2)
|
|
EROFS_FEATURE_FUNCS(ztailpacking, incompat, INCOMPAT_ZTAILPACKING)
|
|
EROFS_FEATURE_FUNCS(fragments, incompat, INCOMPAT_FRAGMENTS)
|
|
EROFS_FEATURE_FUNCS(dedupe, incompat, INCOMPAT_DEDUPE)
|
|
EROFS_FEATURE_FUNCS(xattr_prefixes, incompat, INCOMPAT_XATTR_PREFIXES)
|
|
EROFS_FEATURE_FUNCS(48bit, incompat, INCOMPAT_48BIT)
|
|
EROFS_FEATURE_FUNCS(metabox, incompat, INCOMPAT_METABOX)
|
|
EROFS_FEATURE_FUNCS(sb_chksum, compat, COMPAT_SB_CHKSUM)
|
|
EROFS_FEATURE_FUNCS(xattr_filter, compat, COMPAT_XATTR_FILTER)
|
|
EROFS_FEATURE_FUNCS(shared_ea_in_metabox, compat, COMPAT_SHARED_EA_IN_METABOX)
|
|
EROFS_FEATURE_FUNCS(plain_xattr_pfx, compat, COMPAT_PLAIN_XATTR_PFX)
|
|
EROFS_FEATURE_FUNCS(ishare_xattrs, compat, COMPAT_ISHARE_XATTRS)
|
|
|
|
static inline bool
|
|
erofs_sb_has_xattr_filter_v1(const struct erofs_sb_info *sbi)
|
|
{
|
|
return (erofs_sb_has_xattr_filter(sbi) &&
|
|
sbi->xattr_filter_reserved == 0);
|
|
}
|
|
|
|
struct erofs_inode {
|
|
erofs_nid_t nid;
|
|
uint64_t size;
|
|
uint64_t data_blocks;
|
|
/* Absolute device offset, or metabox-file offset when bit 63 is set. */
|
|
erofs_off_t inode_off;
|
|
erofs_blk_t startblk;
|
|
uint32_t generation;
|
|
uint32_t nlink;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
mode_t mode;
|
|
__enum_uint8(vtype) vtype;
|
|
dev_t rdev;
|
|
time_t mtime;
|
|
uint32_t mtime_nsec;
|
|
uint8_t datalayout;
|
|
uint8_t inode_isize;
|
|
uint32_t xattr_isize;
|
|
bool compact_inode;
|
|
bool dot_omitted;
|
|
/* Compression fields */
|
|
uint16_t z_advise;
|
|
uint8_t z_algorithmtype[2];
|
|
uint8_t z_lclusterbits;
|
|
uint16_t z_idata_size;
|
|
erofs_off_t z_fragmentoff;
|
|
uint64_t z_tailextent_headlcn;
|
|
uint64_t z_extents;
|
|
bool z_initialized;
|
|
/* Chunk-based fields */
|
|
uint16_t chunkformat;
|
|
uint8_t chunkbits;
|
|
/* Fragment fields */
|
|
bool fragment;
|
|
struct erofs_xattr_cache xattr_cache;
|
|
};
|
|
|
|
struct erofs_fid {
|
|
uint16_t len;
|
|
uint16_t pad;
|
|
uint32_t nid_hi;
|
|
uint32_t nid_lo;
|
|
uint32_t gen;
|
|
};
|
|
|
|
_Static_assert(sizeof(struct erofs_fid) == 16,
|
|
"EROFS file handle ABI must be 16 bytes");
|
|
_Static_assert(sizeof(struct erofs_fid) <= sizeof(struct fid),
|
|
"struct erofs_fid must fit within struct fid");
|
|
|
|
#define VTOE(vp) ((struct erofs_inode *)(vp)->v_data)
|
|
|
|
static inline unsigned int
|
|
erofs_inode_version(unsigned int ifmt)
|
|
{
|
|
return ((ifmt >> EROFS_I_VERSION_BIT) & EROFS_I_VERSION_MASK);
|
|
}
|
|
|
|
static inline unsigned int
|
|
erofs_inode_datalayout(unsigned int ifmt)
|
|
{
|
|
return ((ifmt >> EROFS_I_DATALAYOUT_BIT) & EROFS_I_DATALAYOUT_MASK);
|
|
}
|
|
|
|
static inline bool
|
|
erofs_nid_in_metabox(erofs_nid_t nid)
|
|
{
|
|
return ((nid & EROFS_DIRENT_NID_METABOX) != 0);
|
|
}
|
|
|
|
/* Allocated on disk at m_pa. */
|
|
#define EROFS_MAP_MAPPED 0x0001
|
|
/* Located in metadata. */
|
|
#define EROFS_MAP_META 0x0002
|
|
#define EROFS_MAP_PARTIAL_MAPPED 0x0004
|
|
#define EROFS_MAP_PARTIAL_REF 0x0008
|
|
#define EROFS_MAP_FRAGMENT 0x0010
|
|
#define EROFS_MAP_FULL(f) \
|
|
(!((f) & (EROFS_MAP_PARTIAL_MAPPED | EROFS_MAP_PARTIAL_REF)))
|
|
|
|
#define EROFS_GET_BLOCKS_FIEMAP 0x0001
|
|
#define EROFS_GET_BLOCKS_READMORE 0x0002
|
|
#define EROFS_GET_BLOCKS_FINDTAIL 0x0004
|
|
|
|
enum {
|
|
Z_EROFS_COMPRESSION_SHIFTED = Z_EROFS_COMPRESSION_MAX,
|
|
Z_EROFS_COMPRESSION_INTERLACED,
|
|
Z_EROFS_COMPRESSION_RUNTIME_MAX
|
|
};
|
|
|
|
_Static_assert(Z_EROFS_COMPRESSION_RUNTIME_MAX <= UINT8_MAX,
|
|
"algorithm format must fit in uint8_t");
|
|
|
|
struct erofs_map_dev {
|
|
struct erofs_device_info *m_dif;
|
|
|
|
erofs_off_t m_pa;
|
|
unsigned int m_deviceid;
|
|
uint64_t m_plen;
|
|
};
|
|
|
|
struct erofs_buf {
|
|
void *data;
|
|
void (*release)(void *);
|
|
};
|
|
|
|
#define EROFS_BUF_INITIALIZER { .data = NULL, .release = NULL }
|
|
|
|
/* Buffer and device I/O. */
|
|
int erofs_bread(struct erofs_sb_info *sbi, erofs_off_t off, size_t len, void **bufp);
|
|
int erofs_read_physical(struct erofs_sb_info *sbi, unsigned int device_id,
|
|
erofs_off_t off, size_t len, void **bufp);
|
|
void erofs_brelse(void *buf);
|
|
void erofs_put_metabuf(struct erofs_buf *buf);
|
|
int erofs_read_metadata(struct erofs_sb_info *sbi, erofs_nid_t nid,
|
|
erofs_off_t off, size_t len, struct erofs_buf *buf);
|
|
/* Logical mapping and file data. */
|
|
int erofs_map_blocks(struct erofs_sb_info *sbi, struct erofs_inode *vi,
|
|
struct erofs_map_blocks *map);
|
|
int erofs_read_data(struct erofs_sb_info *sbi, struct erofs_inode *vi,
|
|
erofs_off_t loff, size_t len, void **bufp);
|
|
int erofs_read_data_readahead(struct erofs_sb_info *sbi,
|
|
struct erofs_inode *vi, erofs_off_t loff, size_t len, bool sequential,
|
|
void **bufp);
|
|
int erofs_read_file(struct vnode *vp, struct uio *uio, int ioflag);
|
|
int erofs_validate_symlink_target(struct erofs_sb_info *sbi,
|
|
struct erofs_inode *vi);
|
|
int erofs_readlink_target(struct vnode *vp, struct uio *uio);
|
|
|
|
/* Inode and vnode lifecycle. */
|
|
bool erofs_nid_is_valid(struct erofs_sb_info *sbi, erofs_nid_t nid);
|
|
bool erofs_dirent_type_matches(uint8_t file_type,
|
|
__enum_uint8(vtype) vtype);
|
|
int erofs_read_inode(struct erofs_sb_info *sbi, erofs_nid_t nid,
|
|
struct erofs_inode *vi);
|
|
int erofs_vget(struct mount *mp, ino_t ino, int flags, struct vnode **vpp);
|
|
void erofs_xattr_cache_init(struct erofs_inode *vi);
|
|
void erofs_xattr_cache_fini(struct erofs_sb_info *sbi,
|
|
struct erofs_inode *vi);
|
|
|
|
/* Directory operations. */
|
|
int erofs_readdir_block(struct vnode *vp, struct uio *uio, int *eofflag,
|
|
int *ncookies, uint64_t **cookies);
|
|
int erofs_dirent_namelen(const char *blk, uint32_t nameoff, uint32_t endoff,
|
|
bool trailing, size_t *namelenp);
|
|
int erofs_validate_dirblock(const char *blk, uint32_t blksz, uint32_t maxsize,
|
|
uint32_t *ndirentsp);
|
|
int erofs_lookup(struct vop_cachedlookup_args *ap);
|
|
|
|
/* Compressed mapping and data. */
|
|
int z_erofs_fill_inode(struct erofs_sb_info *sbi, struct erofs_inode *vi);
|
|
int z_erofs_map_blocks(struct erofs_sb_info *sbi, struct erofs_inode *vi,
|
|
struct erofs_map_blocks *map);
|
|
void z_erofs_extent_cache_init(struct erofs_sb_info *sbi);
|
|
void z_erofs_extent_cache_fini(struct erofs_sb_info *sbi);
|
|
void z_erofs_stream_pool_init(struct erofs_sb_info *sbi);
|
|
void z_erofs_stream_pool_fini(struct erofs_sb_info *sbi);
|
|
int z_erofs_stream_ctx_get(struct erofs_sb_info *sbi, uint8_t algorithm,
|
|
size_t context_size, erofs_stream_ctx_init_t *init,
|
|
erofs_stream_ctx_fini_t *fini, struct erofs_stream_ctx **ctxp);
|
|
void z_erofs_stream_ctx_put(struct erofs_stream_ctx *ctx, bool reusable);
|
|
int z_erofs_stream_ctx_charge(struct erofs_stream_ctx *ctx, size_t bytes);
|
|
void z_erofs_stream_ctx_uncharge(struct erofs_stream_ctx *ctx, size_t bytes);
|
|
void *z_erofs_stream_ctx_alloc(struct erofs_stream_ctx *ctx, size_t bytes);
|
|
void z_erofs_stream_ctx_free(struct erofs_stream_ctx *ctx, void *address);
|
|
int z_erofs_read_data(struct erofs_sb_info *sbi, struct erofs_inode *vi,
|
|
erofs_off_t loff, size_t len, void **bufp);
|
|
int z_erofs_read_uio(struct erofs_sb_info *sbi, struct erofs_inode *vi,
|
|
struct uio *uio);
|
|
int z_erofs_decompress(struct erofs_sb_info *sbi,
|
|
const struct erofs_map_blocks *map, const void *src, size_t srclen,
|
|
void *dst, size_t dstlen, bool partial);
|
|
|
|
/* Compression configuration. */
|
|
int z_erofs_parse_cfgs(struct erofs_sb_info *sbi,
|
|
const struct erofs_super_block *dsb);
|
|
|
|
/* VOP vectors. */
|
|
extern struct vop_vector erofs_vnodeops;
|
|
extern struct vop_vector erofs_fifoops;
|
|
|
|
#endif /* __EROFS_INTERNAL_H */
|