/* 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/dax.h> #include <linux/dcache.h> #include <linux/mm.h> #include <linux/module.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) … __printf(3, 4) void _erofs_err(struct super_block *sb, const char *function, const char *fmt, ...); #define erofs_err(sb, fmt, ...) … __printf(3, 4) void _erofs_info(struct super_block *sb, const char *function, const char *fmt, ...); #define erofs_info(sb, fmt, ...) … #ifdef CONFIG_EROFS_FS_DEBUG #define DBG_BUGON … #else #define DBG_BUGON … #endif /* !CONFIG_EROFS_FS_DEBUG */ /* EROFS_SUPER_MAGIC_V1 to represent the whole file system */ #define EROFS_SUPER_MAGIC … erofs_nid_t; erofs_off_t; /* data type for filesystem-wide blocks number */ erofs_blk_t; struct erofs_device_info { … }; enum { … }; struct erofs_mount_opts { … }; struct erofs_dev_context { … }; /* all filesystem-wide lz4 configurations */ struct erofs_sb_lz4_info { … }; struct erofs_domain { … }; struct erofs_fscache { … }; struct erofs_xattr_prefix_item { … }; struct erofs_sb_info { … }; #define EROFS_SB(sb) … #define EROFS_I_SB(inode) … /* Mount flags set via mount options or defaults */ #define EROFS_MOUNT_XATTR_USER … #define EROFS_MOUNT_POSIX_ACL … #define EROFS_MOUNT_DAX_ALWAYS … #define EROFS_MOUNT_DAX_NEVER … #define clear_opt(opt, option) … #define set_opt(opt, option) … #define test_opt(opt, option) … static inline bool erofs_is_fscache_mode(struct super_block *sb) { … } enum { … }; /* basic unit of the workstation of a super_block */ struct erofs_workgroup { … }; enum erofs_kmap_type { … }; struct erofs_buf { … }; #define __EROFS_BUF_INITIALIZER … #define erofs_blknr(sb, addr) … #define erofs_blkoff(sb, addr) … #define erofs_pos(sb, blk) … #define erofs_iblks(i) … #define EROFS_FEATURE_FUNCS(name, compat, feature) … EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) EROFS_FEATURE_FUNCS(…) /* atomic flag definitions */ #define EROFS_I_EA_INITED_BIT … #define EROFS_I_Z_INITED_BIT … /* bitlock definitions (arranged in reverse order) */ #define EROFS_I_BL_XATTR_BIT … #define EROFS_I_BL_Z_BIT … struct erofs_inode { … }; #define EROFS_I(ptr) … static inline erofs_off_t erofs_iloc(struct inode *inode) { … } static inline unsigned int erofs_inode_version(unsigned int ifmt) { … } static inline unsigned int erofs_inode_datalayout(unsigned int ifmt) { … } /* reclaiming is never triggered when allocating new folios. */ static inline struct folio *erofs_grab_folio_nowait(struct address_space *as, pgoff_t index) { … } /* Has a disk mapping */ #define EROFS_MAP_MAPPED … /* Located in metadata (could be copied from bd_inode) */ #define EROFS_MAP_META … /* The extent is encoded */ #define EROFS_MAP_ENCODED … /* The length of extent is full */ #define EROFS_MAP_FULL_MAPPED … /* Located in the special packed inode */ #define EROFS_MAP_FRAGMENT … /* The extent refers to partial decompressed data */ #define EROFS_MAP_PARTIAL_REF … struct erofs_map_blocks { … }; /* * 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 … /* Used to map the whole extent if non-negligible data is requested for LZMA */ #define EROFS_GET_BLOCKS_READMORE … /* Used to map tail extent for tailpacking inline or fragment pcluster */ #define EROFS_GET_BLOCKS_FINDTAIL … enum { … }; struct erofs_map_dev { … }; 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 … #define EROFS_REG_COOKIE_NEED_NOEXIST … 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_off_t offset, 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_off_t offset, 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 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, bool tryrsv); static inline struct page *erofs_allocpage(struct page **pagepool, gfp_t gfp) { … } static inline void erofs_pagepool_add(struct page **pagepool, struct page *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_subsystem(void); void z_erofs_exit_subsystem(void); int erofs_try_to_free_all_cached_folios(struct erofs_sb_info *sbi, struct erofs_workgroup *egrp); int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map, int flags); void *z_erofs_get_gbuf(unsigned int requiredpages); void z_erofs_put_gbuf(void *ptr); int z_erofs_gbuf_growsize(unsigned int nrpages); int __init z_erofs_gbuf_init(void); void z_erofs_gbuf_exit(void); int erofs_init_managed_cache(struct super_block *sb); int z_erofs_parse_cfgs(struct super_block *sb, struct erofs_super_block *dsb); #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_subsystem(void) { return 0; } static inline void z_erofs_exit_subsystem(void) {} static inline int erofs_init_managed_cache(struct super_block *sb) { return 0; } #endif /* !CONFIG_EROFS_FS_ZIP */ #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); struct bio *erofs_fscache_bio_alloc(struct erofs_map_dev *mdev); void erofs_fscache_submit_bio(struct bio *bio); #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) { } static inline struct bio *erofs_fscache_bio_alloc(struct erofs_map_dev *mdev) { return NULL; } static inline void erofs_fscache_submit_bio(struct bio *bio) {} #endif #define EFSCORRUPTED … #endif /* __EROFS_INTERNAL_H */
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