1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Squashfs - a compressed read only filesystem for Linux 4 * 5 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008 6 * Phillip Lougher <phillip@squashfs.org.uk> 7 * 8 * squashfs.h 9 */ 10 11 #define TRACE(s, args...) pr_debug("SQUASHFS: "s, ## args) 12 13 #define ERROR(s, args...) pr_err("SQUASHFS error: "s, ## args) 14 15 #define WARNING(s, args...) pr_warn("SQUASHFS: "s, ## args) 16 17 /* block.c */ 18 extern int squashfs_read_data(struct super_block *, u64, int, u64 *, 19 struct squashfs_page_actor *); 20 21 /* cache.c */ 22 extern struct squashfs_cache *squashfs_cache_init(char *, int, int); 23 extern void squashfs_cache_delete(struct squashfs_cache *); 24 extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *, 25 struct squashfs_cache *, u64, int); 26 extern void squashfs_cache_put(struct squashfs_cache_entry *); 27 extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int); 28 extern int squashfs_read_metadata(struct super_block *, void *, u64 *, 29 int *, int); 30 extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *, 31 u64, int); 32 extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *, 33 u64, int); 34 extern void *squashfs_read_table(struct super_block *, u64, int); 35 36 /* decompressor.c */ 37 extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int); 38 extern void *squashfs_decompressor_setup(struct super_block *, unsigned short); 39 40 /* decompressor_xxx.c */ 41 42 struct squashfs_decompressor_thread_ops { 43 void * (*create)(struct squashfs_sb_info *msblk, void *comp_opts); 44 void (*destroy)(struct squashfs_sb_info *msblk); 45 int (*decompress)(struct squashfs_sb_info *msblk, struct bio *bio, 46 int offset, int length, struct squashfs_page_actor *output); 47 int (*max_decompressors)(void); 48 }; 49 50 #ifdef CONFIG_SQUASHFS_DECOMP_SINGLE 51 extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_single; 52 #endif 53 #ifdef CONFIG_SQUASHFS_DECOMP_MULTI 54 extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_multi; 55 #endif 56 #ifdef CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU 57 extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_percpu; 58 #endif 59 60 /* export.c */ 61 extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64, 62 unsigned int); 63 64 /* fragment.c */ 65 extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *); 66 extern __le64 *squashfs_read_fragment_index_table(struct super_block *, 67 u64, u64, unsigned int); 68 69 /* file.c */ 70 void squashfs_fill_page(struct page *, struct squashfs_cache_entry *, int, int); 71 void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int, 72 int); 73 74 /* file_xxx.c */ 75 extern int squashfs_readpage_block(struct page *, u64, int, int); 76 77 /* id.c */ 78 extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *); 79 extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64, 80 unsigned short); 81 82 /* inode.c */ 83 extern struct inode *squashfs_iget(struct super_block *, long long, 84 unsigned int); 85 extern int squashfs_read_inode(struct inode *, long long); 86 87 /* xattr.c */ 88 extern ssize_t squashfs_listxattr(struct dentry *, char *, size_t); 89 90 /* 91 * Inodes, files, decompressor and xattr operations 92 */ 93 94 /* dir.c */ 95 extern const struct file_operations squashfs_dir_ops; 96 97 /* export.c */ 98 extern const struct export_operations squashfs_export_ops; 99 100 /* file.c */ 101 extern const struct address_space_operations squashfs_aops; 102 103 /* inode.c */ 104 extern const struct inode_operations squashfs_inode_ops; 105 106 /* namei.c */ 107 extern const struct inode_operations squashfs_dir_inode_ops; 108 109 /* symlink.c */ 110 extern const struct address_space_operations squashfs_symlink_aops; 111 extern const struct inode_operations squashfs_symlink_inode_ops; 112 113 /* xattr.c */ 114 extern const struct xattr_handler *squashfs_xattr_handlers[]; 115