diff options
Diffstat (limited to 'fs/erofs/internal.h')
| -rw-r--r-- | fs/erofs/internal.h | 160 |
1 files changed, 144 insertions, 16 deletions
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 9524e155b38f..5298c4ee277d 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -47,12 +47,28 @@ typedef u64 erofs_off_t; /* data type for filesystem-wide blocks number */ typedef u32 erofs_blk_t; -struct erofs_fs_context { +struct erofs_device_info { + char *path; + 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 (false - auto, true - force on) */ - bool readahead_sync_decompress; + /* 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; @@ -60,6 +76,18 @@ struct erofs_fs_context { unsigned int mount_opt; }; +struct erofs_dev_context { + struct idr tree; + struct rw_semaphore rwsem; + + unsigned int extra_devices; +}; + +struct erofs_fs_context { + struct erofs_mount_opts opt; + struct erofs_dev_context *devs; +}; + /* all filesystem-wide lz4 configurations */ struct erofs_sb_lz4_info { /* # of pages needed for EROFS lz4 rolling decompression */ @@ -69,6 +97,7 @@ struct erofs_sb_lz4_info { }; 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; @@ -85,12 +114,17 @@ struct erofs_sb_info { struct erofs_sb_lz4_info lz4; #endif /* CONFIG_EROFS_FS_ZIP */ + struct erofs_dev_context *devs; struct dax_device *dax_dev; - u32 blocks; + u64 dax_part_off; + u64 total_blocks; + u32 primarydevice_blocks; + u32 meta_blkaddr; #ifdef CONFIG_EROFS_FS_XATTR u32 xattr_blkaddr; #endif + u16 device_id_mask; /* valid bits of device id to be used */ /* inode slot unit size in bit shift */ unsigned char islotbits; @@ -109,7 +143,9 @@ struct erofs_sb_info { u32 feature_compat; u32 feature_incompat; - struct erofs_fs_context ctx; /* options */ + /* sysfs support */ + struct kobject s_kobj; /* /sys/fs/erofs/<devname> */ + struct completion s_kobj_unregister; }; #define EROFS_SB(sb) ((struct erofs_sb_info *)(sb)->s_fs_info) @@ -121,9 +157,9 @@ struct erofs_sb_info { #define EROFS_MOUNT_DAX_ALWAYS 0x00000040 #define EROFS_MOUNT_DAX_NEVER 0x00000080 -#define clear_opt(ctx, option) ((ctx)->mount_opt &= ~EROFS_MOUNT_##option) -#define set_opt(ctx, option) ((ctx)->mount_opt |= EROFS_MOUNT_##option) -#define test_opt(ctx, option) ((ctx)->mount_opt & EROFS_MOUNT_##option) +#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) enum { EROFS_ZIP_CACHE_DISABLED, @@ -217,6 +253,19 @@ static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp) #error erofs cannot be used in this platform #endif +enum erofs_kmap_type { + EROFS_NO_KMAP, /* don't map the buffer */ + EROFS_KMAP, /* use kmap() to map the buffer */ + EROFS_KMAP_ATOMIC, /* use kmap_atomic() to map the buffer */ +}; + +struct erofs_buf { + 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(addr) ((addr) / EROFS_BLKSIZ) @@ -234,9 +283,13 @@ static inline bool erofs_sb_has_##name(struct erofs_sb_info *sbi) \ return sbi->feature_##compat & EROFS_FEATURE_##feature; \ } -EROFS_FEATURE_FUNCS(lz4_0padding, incompat, INCOMPAT_LZ4_0PADDING) +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(sb_chksum, compat, COMPAT_SB_CHKSUM) /* atomic flag definitions */ @@ -271,6 +324,9 @@ struct erofs_inode { unsigned short z_advise; unsigned char z_algorithmtype[2]; unsigned char z_logical_clusterbits; + unsigned long z_tailextent_headlcn; + erofs_off_t z_idataoff; + unsigned short z_idata_size; }; #endif /* CONFIG_EROFS_FS_ZIP */ }; @@ -307,6 +363,19 @@ static inline unsigned int erofs_inode_datalayout(unsigned int value) EROFS_I_DATALAYOUT_BITS); } +/* + * 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); +} + extern const struct super_operations erofs_sops; extern const struct address_space_operations erofs_raw_access_aops; @@ -338,7 +407,7 @@ extern const struct address_space_operations z_erofs_aops; * of the corresponding uncompressed data in the file. */ enum { - BH_Zipped = BH_PrivateStart, + BH_Encoded = BH_PrivateStart, BH_FullMapped, }; @@ -346,18 +415,20 @@ enum { #define EROFS_MAP_MAPPED (1 << BH_Mapped) /* Located in metadata (could be copied from bd_inode) */ #define EROFS_MAP_META (1 << BH_Meta) -/* The extent has been compressed */ -#define EROFS_MAP_ZIPPED (1 << BH_Zipped) +/* The extent is encoded */ +#define EROFS_MAP_ENCODED (1 << BH_Encoded) /* The length of extent is full */ #define EROFS_MAP_FULL_MAPPED (1 << BH_FullMapped) 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; - - struct page *mpage; }; /* Flags used by erofs_map_blocks_flatmode() */ @@ -367,6 +438,15 @@ struct erofs_map_blocks { * approach instead if possible since it's more metadata lightweight.) */ #define EROFS_GET_BLOCKS_FIEMAP 0x0002 +/* Used to map the whole extent if non-negligible data is requested for LZMA */ +#define EROFS_GET_BLOCKS_READMORE 0x0004 +/* Used to map tail extent for tailpacking inline pcluster */ +#define EROFS_GET_BLOCKS_FINDTAIL 0x0008 + +enum { + Z_EROFS_COMPRESSION_SHIFTED = Z_EROFS_COMPRESSION_MAX, + Z_EROFS_COMPRESSION_RUNTIME_MAX +}; /* zmap.c */ extern const struct iomap_ops z_erofs_iomap_report_ops; @@ -386,9 +466,24 @@ static inline int z_erofs_map_blocks_iter(struct inode *inode, } #endif /* !CONFIG_EROFS_FS_ZIP */ +struct erofs_map_dev { + struct block_device *m_bdev; + struct dax_device *m_daxdev; + u64 m_dax_part_off; + + erofs_off_t m_pa; + unsigned int m_deviceid; +}; + /* data.c */ extern const struct file_operations erofs_file_fops; -struct page *erofs_get_meta_page(struct super_block *sb, erofs_blk_t blkaddr); +void erofs_unmap_metabuf(struct erofs_buf *buf); +void erofs_put_metabuf(struct erofs_buf *buf); +void *erofs_bread(struct erofs_buf *buf, struct inode *inode, + erofs_blk_t blkaddr, enum erofs_kmap_type type); +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); @@ -442,8 +537,21 @@ int erofs_pcpubuf_growsize(unsigned int nrpages); void erofs_pcpubuf_init(void); void erofs_pcpubuf_exit(void); +/* sysfs.c */ +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); + /* utils.c / zdata.c */ -struct page *erofs_allocpage(struct list_head *pool, gfp_t gfp); +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 int erofs_workgroup_put(struct erofs_workgroup *grp); @@ -483,6 +591,26 @@ static inline int z_erofs_load_lz4_config(struct super_block *sb, } #endif /* !CONFIG_EROFS_FS_ZIP */ +#ifdef CONFIG_EROFS_FS_ZIP_LZMA +int 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 */ + #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ #endif /* __EROFS_INTERNAL_H */ |