574 lines
17 KiB
C
574 lines
17 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 <linux/fs.h>
|
|
#include <linux/dcache.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/magic.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/iomap.h>
|
|
#include "erofs_fs.h"
|
|
|
|
/* redefine pr_fmt "erofs: " */
|
|
#undef pr_fmt
|
|
#define pr_fmt(fmt) "erofs: " fmt
|
|
|
|
__printf(3, 4) void _erofs_err(struct super_block *sb,
|
|
const char *function, const char *fmt, ...);
|
|
#define erofs_err(sb, fmt, ...) \
|
|
_erofs_err(sb, __func__, fmt "\n", ##__VA_ARGS__)
|
|
__printf(3, 4) void _erofs_info(struct super_block *sb,
|
|
const char *function, const char *fmt, ...);
|
|
#define erofs_info(sb, fmt, ...) \
|
|
_erofs_info(sb, __func__, fmt "\n", ##__VA_ARGS__)
|
|
#ifdef CONFIG_EROFS_FS_DEBUG
|
|
#define DBG_BUGON BUG_ON
|
|
#else
|
|
#define DBG_BUGON(x) ((void)(x))
|
|
#endif /* !CONFIG_EROFS_FS_DEBUG */
|
|
|
|
/* EROFS_SUPER_MAGIC_V1 to represent the whole file system */
|
|
#define EROFS_SUPER_MAGIC EROFS_SUPER_MAGIC_V1
|
|
|
|
typedef u64 erofs_nid_t;
|
|
typedef u64 erofs_off_t;
|
|
/* data type for filesystem-wide blocks number */
|
|
typedef u32 erofs_blk_t;
|
|
|
|
struct erofs_device_info {
|
|
char *path;
|
|
struct erofs_fscache *fscache;
|
|
struct block_device *bdev;
|
|
struct dax_device *dax_dev;
|
|
u64 dax_part_off;
|
|
|
|
u32 blocks;
|
|
u32 mapped_blkaddr;
|
|
};
|
|
|
|
enum {
|
|
EROFS_SYNC_DECOMPRESS_AUTO,
|
|
EROFS_SYNC_DECOMPRESS_FORCE_ON,
|
|
EROFS_SYNC_DECOMPRESS_FORCE_OFF
|
|
};
|
|
|
|
struct erofs_mount_opts {
|
|
#ifdef CONFIG_EROFS_FS_ZIP
|
|
/* current strategy of how to use managed cache */
|
|
unsigned char cache_strategy;
|
|
/* strategy of sync decompression (0 - auto, 1 - force on, 2 - force off) */
|
|
unsigned int sync_decompress;
|
|
|
|
/* threshold for decompression synchronously */
|
|
unsigned int max_sync_decompress_pages;
|
|
#endif
|
|
unsigned int mount_opt;
|
|
};
|
|
|
|
struct erofs_dev_context {
|
|
struct idr tree;
|
|
struct rw_semaphore rwsem;
|
|
|
|
unsigned int extra_devices;
|
|
bool flatdev;
|
|
};
|
|
|
|
struct erofs_fs_context {
|
|
struct erofs_mount_opts opt;
|
|
struct erofs_dev_context *devs;
|
|
char *fsid;
|
|
char *domain_id;
|
|
};
|
|
|
|
/* all filesystem-wide lz4 configurations */
|
|
struct erofs_sb_lz4_info {
|
|
/* # of pages needed for EROFS lz4 rolling decompression */
|
|
u16 max_distance_pages;
|
|
/* maximum possible blocks for pclusters in the filesystem */
|
|
u16 max_pclusterblks;
|
|
};
|
|
|
|
struct erofs_domain {
|
|
refcount_t ref;
|
|
struct list_head list;
|
|
struct fscache_volume *volume;
|
|
char *domain_id;
|
|
};
|
|
|
|
struct erofs_fscache {
|
|
struct fscache_cookie *cookie;
|
|
struct inode *inode; /* anonymous inode for the blob */
|
|
|
|
/* used for share domain mode */
|
|
struct erofs_domain *domain;
|
|
struct list_head node;
|
|
refcount_t ref;
|
|
char *name;
|
|
};
|
|
|
|
struct erofs_xattr_prefix_item {
|
|
struct erofs_xattr_long_prefix *prefix;
|
|
u8 infix_len;
|
|
};
|
|
|
|
struct erofs_sb_info {
|
|
struct erofs_mount_opts opt; /* options */
|
|
#ifdef CONFIG_EROFS_FS_ZIP
|
|
/* list for all registered superblocks, mainly for shrinker */
|
|
struct list_head list;
|
|
struct mutex umount_mutex;
|
|
|
|
/* managed XArray arranged in physical block number */
|
|
struct xarray managed_pslots;
|
|
|
|
unsigned int shrinker_run_no;
|
|
u16 available_compr_algs;
|
|
|
|
/* pseudo inode to manage cached pages */
|
|
struct inode *managed_cache;
|
|
|
|
struct erofs_sb_lz4_info lz4;
|
|
#endif /* CONFIG_EROFS_FS_ZIP */
|
|
struct inode *packed_inode;
|
|
struct erofs_dev_context *devs;
|
|
struct dax_device *dax_dev;
|
|
u64 dax_part_off;
|
|
u64 total_blocks;
|
|
u32 primarydevice_blocks;
|
|
|
|
u32 meta_blkaddr;
|
|
#ifdef CONFIG_EROFS_FS_XATTR
|
|
u32 xattr_blkaddr;
|
|
u32 xattr_prefix_start;
|
|
u8 xattr_prefix_count;
|
|
struct erofs_xattr_prefix_item *xattr_prefixes;
|
|
unsigned int xattr_filter_reserved;
|
|
#endif
|
|
u16 device_id_mask; /* valid bits of device id to be used */
|
|
|
|
unsigned char islotbits; /* inode slot unit size in bit shift */
|
|
unsigned char blkszbits; /* filesystem block size in bit shift */
|
|
|
|
u32 sb_size; /* total superblock size */
|
|
u32 build_time_nsec;
|
|
u64 build_time;
|
|
|
|
/* what we really care is nid, rather than ino.. */
|
|
erofs_nid_t root_nid;
|
|
erofs_nid_t packed_nid;
|
|
/* used for statfs, f_files - f_favail */
|
|
u64 inos;
|
|
|
|
u8 uuid[16]; /* 128-bit uuid for volume */
|
|
u8 volume_name[16]; /* volume name */
|
|
u32 feature_compat;
|
|
u32 feature_incompat;
|
|
|
|
/* sysfs support */
|
|
struct kobject s_kobj; /* /sys/fs/erofs/<devname> */
|
|
struct completion s_kobj_unregister;
|
|
|
|
/* fscache support */
|
|
struct fscache_volume *volume;
|
|
struct erofs_fscache *s_fscache;
|
|
struct erofs_domain *domain;
|
|
char *fsid;
|
|
char *domain_id;
|
|
};
|
|
|
|
#define EROFS_SB(sb) ((struct erofs_sb_info *)(sb)->s_fs_info)
|
|
#define EROFS_I_SB(inode) ((struct erofs_sb_info *)(inode)->i_sb->s_fs_info)
|
|
|
|
/* Mount flags set via mount options or defaults */
|
|
#define EROFS_MOUNT_XATTR_USER 0x00000010
|
|
#define EROFS_MOUNT_POSIX_ACL 0x00000020
|
|
#define EROFS_MOUNT_DAX_ALWAYS 0x00000040
|
|
#define EROFS_MOUNT_DAX_NEVER 0x00000080
|
|
|
|
#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)
|
|
|
|
static inline bool erofs_is_fscache_mode(struct super_block *sb)
|
|
{
|
|
return IS_ENABLED(CONFIG_EROFS_FS_ONDEMAND) && !sb->s_bdev;
|
|
}
|
|
|
|
enum {
|
|
EROFS_ZIP_CACHE_DISABLED,
|
|
EROFS_ZIP_CACHE_READAHEAD,
|
|
EROFS_ZIP_CACHE_READAROUND
|
|
};
|
|
|
|
/* basic unit of the workstation of a super_block */
|
|
struct erofs_workgroup {
|
|
pgoff_t index;
|
|
struct lockref lockref;
|
|
};
|
|
|
|
enum erofs_kmap_type {
|
|
EROFS_NO_KMAP, /* don't map the buffer */
|
|
EROFS_KMAP, /* use kmap_local_page() to map the buffer */
|
|
};
|
|
|
|
struct erofs_buf {
|
|
struct inode *inode;
|
|
struct page *page;
|
|
void *base;
|
|
enum erofs_kmap_type kmap_type;
|
|
};
|
|
#define __EROFS_BUF_INITIALIZER ((struct erofs_buf){ .page = NULL })
|
|
|
|
#define ROOT_NID(sb) ((sb)->root_nid)
|
|
|
|
#define erofs_blknr(sb, addr) ((addr) >> (sb)->s_blocksize_bits)
|
|
#define erofs_blkoff(sb, addr) ((addr) & ((sb)->s_blocksize - 1))
|
|
#define erofs_pos(sb, blk) ((erofs_off_t)(blk) << (sb)->s_blocksize_bits)
|
|
#define erofs_iblks(i) (round_up((i)->i_size, i_blocksize(i)) >> (i)->i_blkbits)
|
|
|
|
#define EROFS_FEATURE_FUNCS(name, compat, feature) \
|
|
static inline bool erofs_sb_has_##name(struct erofs_sb_info *sbi) \
|
|
{ \
|
|
return sbi->feature_##compat & EROFS_FEATURE_##feature; \
|
|
}
|
|
|
|
EROFS_FEATURE_FUNCS(zero_padding, incompat, INCOMPAT_ZERO_PADDING)
|
|
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(sb_chksum, compat, COMPAT_SB_CHKSUM)
|
|
EROFS_FEATURE_FUNCS(xattr_filter, compat, COMPAT_XATTR_FILTER)
|
|
|
|
/* atomic flag definitions */
|
|
#define EROFS_I_EA_INITED_BIT 0
|
|
#define EROFS_I_Z_INITED_BIT 1
|
|
|
|
/* bitlock definitions (arranged in reverse order) */
|
|
#define EROFS_I_BL_XATTR_BIT (BITS_PER_LONG - 1)
|
|
#define EROFS_I_BL_Z_BIT (BITS_PER_LONG - 2)
|
|
|
|
struct erofs_inode {
|
|
erofs_nid_t nid;
|
|
|
|
/* atomic flags (including bitlocks) */
|
|
unsigned long flags;
|
|
|
|
unsigned char datalayout;
|
|
unsigned char inode_isize;
|
|
unsigned int xattr_isize;
|
|
|
|
unsigned int xattr_name_filter;
|
|
unsigned int xattr_shared_count;
|
|
unsigned int *xattr_shared_xattrs;
|
|
|
|
union {
|
|
erofs_blk_t raw_blkaddr;
|
|
struct {
|
|
unsigned short chunkformat;
|
|
unsigned char chunkbits;
|
|
};
|
|
#ifdef CONFIG_EROFS_FS_ZIP
|
|
struct {
|
|
unsigned short z_advise;
|
|
unsigned char z_algorithmtype[2];
|
|
unsigned char z_logical_clusterbits;
|
|
unsigned long z_tailextent_headlcn;
|
|
union {
|
|
struct {
|
|
erofs_off_t z_idataoff;
|
|
unsigned short z_idata_size;
|
|
};
|
|
erofs_off_t z_fragmentoff;
|
|
};
|
|
};
|
|
#endif /* CONFIG_EROFS_FS_ZIP */
|
|
};
|
|
/* the corresponding vfs inode */
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
#define EROFS_I(ptr) container_of(ptr, struct erofs_inode, vfs_inode)
|
|
|
|
static inline erofs_off_t erofs_iloc(struct inode *inode)
|
|
{
|
|
struct erofs_sb_info *sbi = EROFS_I_SB(inode);
|
|
|
|
return erofs_pos(inode->i_sb, sbi->meta_blkaddr) +
|
|
(EROFS_I(inode)->nid << sbi->islotbits);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Different from grab_cache_page_nowait(), reclaiming is never triggered
|
|
* when allocating new pages.
|
|
*/
|
|
static inline
|
|
struct page *erofs_grab_cache_page_nowait(struct address_space *mapping,
|
|
pgoff_t index)
|
|
{
|
|
return pagecache_get_page(mapping, index,
|
|
FGP_LOCK|FGP_CREAT|FGP_NOFS|FGP_NOWAIT,
|
|
readahead_gfp_mask(mapping) & ~__GFP_RECLAIM);
|
|
}
|
|
|
|
/* Has a disk mapping */
|
|
#define EROFS_MAP_MAPPED 0x0001
|
|
/* Located in metadata (could be copied from bd_inode) */
|
|
#define EROFS_MAP_META 0x0002
|
|
/* The extent is encoded */
|
|
#define EROFS_MAP_ENCODED 0x0004
|
|
/* The length of extent is full */
|
|
#define EROFS_MAP_FULL_MAPPED 0x0008
|
|
/* Located in the special packed inode */
|
|
#define EROFS_MAP_FRAGMENT 0x0010
|
|
/* The extent refers to partial decompressed data */
|
|
#define EROFS_MAP_PARTIAL_REF 0x0020
|
|
|
|
struct erofs_map_blocks {
|
|
struct erofs_buf buf;
|
|
|
|
erofs_off_t m_pa, m_la;
|
|
u64 m_plen, m_llen;
|
|
|
|
unsigned short m_deviceid;
|
|
char m_algorithmformat;
|
|
unsigned int m_flags;
|
|
};
|
|
|
|
/*
|
|
* Used to get the exact decompressed length, e.g. fiemap (consider lookback
|
|
* approach instead if possible since it's more metadata lightweight.)
|
|
*/
|
|
#define EROFS_GET_BLOCKS_FIEMAP 0x0001
|
|
/* Used to map the whole extent if non-negligible data is requested for LZMA */
|
|
#define EROFS_GET_BLOCKS_READMORE 0x0002
|
|
/* Used to map tail extent for tailpacking inline or fragment pcluster */
|
|
#define EROFS_GET_BLOCKS_FINDTAIL 0x0004
|
|
|
|
enum {
|
|
Z_EROFS_COMPRESSION_SHIFTED = Z_EROFS_COMPRESSION_MAX,
|
|
Z_EROFS_COMPRESSION_INTERLACED,
|
|
Z_EROFS_COMPRESSION_RUNTIME_MAX
|
|
};
|
|
|
|
struct erofs_map_dev {
|
|
struct erofs_fscache *m_fscache;
|
|
struct block_device *m_bdev;
|
|
struct dax_device *m_daxdev;
|
|
u64 m_dax_part_off;
|
|
|
|
erofs_off_t m_pa;
|
|
unsigned int m_deviceid;
|
|
};
|
|
|
|
extern struct file_system_type erofs_fs_type;
|
|
extern const struct super_operations erofs_sops;
|
|
|
|
extern const struct address_space_operations erofs_raw_access_aops;
|
|
extern const struct address_space_operations z_erofs_aops;
|
|
extern const struct address_space_operations erofs_fscache_access_aops;
|
|
|
|
extern const struct inode_operations erofs_generic_iops;
|
|
extern const struct inode_operations erofs_symlink_iops;
|
|
extern const struct inode_operations erofs_fast_symlink_iops;
|
|
extern const struct inode_operations erofs_dir_iops;
|
|
|
|
extern const struct file_operations erofs_file_fops;
|
|
extern const struct file_operations erofs_dir_fops;
|
|
|
|
extern const struct iomap_ops z_erofs_iomap_report_ops;
|
|
|
|
/* flags for erofs_fscache_register_cookie() */
|
|
#define EROFS_REG_COOKIE_SHARE 0x0001
|
|
#define EROFS_REG_COOKIE_NEED_NOEXIST 0x0002
|
|
|
|
void *erofs_read_metadata(struct super_block *sb, struct erofs_buf *buf,
|
|
erofs_off_t *offset, int *lengthp);
|
|
void erofs_unmap_metabuf(struct erofs_buf *buf);
|
|
void erofs_put_metabuf(struct erofs_buf *buf);
|
|
void *erofs_bread(struct erofs_buf *buf, erofs_blk_t blkaddr,
|
|
enum erofs_kmap_type type);
|
|
void erofs_init_metabuf(struct erofs_buf *buf, struct super_block *sb);
|
|
void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb,
|
|
erofs_blk_t blkaddr, enum erofs_kmap_type type);
|
|
int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *dev);
|
|
int erofs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
|
|
u64 start, u64 len);
|
|
int erofs_map_blocks(struct inode *inode, struct erofs_map_blocks *map);
|
|
struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid);
|
|
int erofs_getattr(struct mnt_idmap *idmap, const struct path *path,
|
|
struct kstat *stat, u32 request_mask,
|
|
unsigned int query_flags);
|
|
int erofs_namei(struct inode *dir, const struct qstr *name,
|
|
erofs_nid_t *nid, unsigned int *d_type);
|
|
|
|
static inline void *erofs_vm_map_ram(struct page **pages, unsigned int count)
|
|
{
|
|
int retried = 0;
|
|
|
|
while (1) {
|
|
void *p = vm_map_ram(pages, count, -1);
|
|
|
|
/* retry two more times (totally 3 times) */
|
|
if (p || ++retried >= 3)
|
|
return p;
|
|
vm_unmap_aliases();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int erofs_register_sysfs(struct super_block *sb);
|
|
void erofs_unregister_sysfs(struct super_block *sb);
|
|
int __init erofs_init_sysfs(void);
|
|
void erofs_exit_sysfs(void);
|
|
|
|
struct page *erofs_allocpage(struct page **pagepool, gfp_t gfp);
|
|
static inline void erofs_pagepool_add(struct page **pagepool, struct page *page)
|
|
{
|
|
set_page_private(page, (unsigned long)*pagepool);
|
|
*pagepool = page;
|
|
}
|
|
void erofs_release_pages(struct page **pagepool);
|
|
|
|
#ifdef CONFIG_EROFS_FS_ZIP
|
|
void erofs_workgroup_put(struct erofs_workgroup *grp);
|
|
struct erofs_workgroup *erofs_find_workgroup(struct super_block *sb,
|
|
pgoff_t index);
|
|
struct erofs_workgroup *erofs_insert_workgroup(struct super_block *sb,
|
|
struct erofs_workgroup *grp);
|
|
void erofs_workgroup_free_rcu(struct erofs_workgroup *grp);
|
|
void erofs_shrinker_register(struct super_block *sb);
|
|
void erofs_shrinker_unregister(struct super_block *sb);
|
|
int __init erofs_init_shrinker(void);
|
|
void erofs_exit_shrinker(void);
|
|
int __init z_erofs_init_zip_subsystem(void);
|
|
void z_erofs_exit_zip_subsystem(void);
|
|
int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
|
|
struct erofs_workgroup *egrp);
|
|
int z_erofs_load_lz4_config(struct super_block *sb,
|
|
struct erofs_super_block *dsb,
|
|
struct z_erofs_lz4_cfgs *lz4, int len);
|
|
int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map,
|
|
int flags);
|
|
void *erofs_get_pcpubuf(unsigned int requiredpages);
|
|
void erofs_put_pcpubuf(void *ptr);
|
|
int erofs_pcpubuf_growsize(unsigned int nrpages);
|
|
void __init erofs_pcpubuf_init(void);
|
|
void erofs_pcpubuf_exit(void);
|
|
int erofs_init_managed_cache(struct super_block *sb);
|
|
#else
|
|
static inline void erofs_shrinker_register(struct super_block *sb) {}
|
|
static inline void erofs_shrinker_unregister(struct super_block *sb) {}
|
|
static inline int erofs_init_shrinker(void) { return 0; }
|
|
static inline void erofs_exit_shrinker(void) {}
|
|
static inline int z_erofs_init_zip_subsystem(void) { return 0; }
|
|
static inline void z_erofs_exit_zip_subsystem(void) {}
|
|
static inline int z_erofs_load_lz4_config(struct super_block *sb,
|
|
struct erofs_super_block *dsb,
|
|
struct z_erofs_lz4_cfgs *lz4, int len)
|
|
{
|
|
if (lz4 || dsb->u1.lz4_max_distance) {
|
|
erofs_err(sb, "lz4 algorithm isn't enabled");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
static inline void erofs_pcpubuf_init(void) {}
|
|
static inline void erofs_pcpubuf_exit(void) {}
|
|
static inline int erofs_init_managed_cache(struct super_block *sb) { return 0; }
|
|
#endif /* !CONFIG_EROFS_FS_ZIP */
|
|
|
|
#ifdef CONFIG_EROFS_FS_ZIP_LZMA
|
|
int __init z_erofs_lzma_init(void);
|
|
void z_erofs_lzma_exit(void);
|
|
int z_erofs_load_lzma_config(struct super_block *sb,
|
|
struct erofs_super_block *dsb,
|
|
struct z_erofs_lzma_cfgs *lzma, int size);
|
|
#else
|
|
static inline int z_erofs_lzma_init(void) { return 0; }
|
|
static inline int z_erofs_lzma_exit(void) { return 0; }
|
|
static inline int z_erofs_load_lzma_config(struct super_block *sb,
|
|
struct erofs_super_block *dsb,
|
|
struct z_erofs_lzma_cfgs *lzma, int size) {
|
|
if (lzma) {
|
|
erofs_err(sb, "lzma algorithm isn't enabled");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* !CONFIG_EROFS_FS_ZIP_LZMA */
|
|
|
|
#ifdef CONFIG_EROFS_FS_ZIP_DEFLATE
|
|
int __init z_erofs_deflate_init(void);
|
|
void z_erofs_deflate_exit(void);
|
|
int z_erofs_load_deflate_config(struct super_block *sb,
|
|
struct erofs_super_block *dsb,
|
|
struct z_erofs_deflate_cfgs *dfl, int size);
|
|
#else
|
|
static inline int z_erofs_deflate_init(void) { return 0; }
|
|
static inline int z_erofs_deflate_exit(void) { return 0; }
|
|
static inline int z_erofs_load_deflate_config(struct super_block *sb,
|
|
struct erofs_super_block *dsb,
|
|
struct z_erofs_deflate_cfgs *dfl, int size) {
|
|
if (dfl) {
|
|
erofs_err(sb, "deflate algorithm isn't enabled");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif /* !CONFIG_EROFS_FS_ZIP_DEFLATE */
|
|
|
|
#ifdef CONFIG_EROFS_FS_ONDEMAND
|
|
int erofs_fscache_register_fs(struct super_block *sb);
|
|
void erofs_fscache_unregister_fs(struct super_block *sb);
|
|
|
|
struct erofs_fscache *erofs_fscache_register_cookie(struct super_block *sb,
|
|
char *name, unsigned int flags);
|
|
void erofs_fscache_unregister_cookie(struct erofs_fscache *fscache);
|
|
#else
|
|
static inline int erofs_fscache_register_fs(struct super_block *sb)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
static inline void erofs_fscache_unregister_fs(struct super_block *sb) {}
|
|
|
|
static inline
|
|
struct erofs_fscache *erofs_fscache_register_cookie(struct super_block *sb,
|
|
char *name, unsigned int flags)
|
|
{
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
static inline void erofs_fscache_unregister_cookie(struct erofs_fscache *fscache)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
|
|
|
|
#endif /* __EROFS_INTERNAL_H */
|