^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2017-2018 HUAWEI, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * https://www.huawei.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Created by Gao Xiang <gaoxiang25@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #ifndef __EROFS_INTERNAL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define __EROFS_INTERNAL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/dcache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/bio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/magic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "erofs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* redefine pr_fmt "erofs: " */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define pr_fmt(fmt) "erofs: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) __printf(3, 4) void _erofs_err(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) const char *function, const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define erofs_err(sb, fmt, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) _erofs_err(sb, __func__, fmt "\n", ##__VA_ARGS__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) __printf(3, 4) void _erofs_info(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) const char *function, const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define erofs_info(sb, fmt, ...) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) _erofs_info(sb, __func__, fmt "\n", ##__VA_ARGS__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #ifdef CONFIG_EROFS_FS_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define erofs_dbg(x, ...) pr_debug(x "\n", ##__VA_ARGS__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define DBG_BUGON BUG_ON
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define erofs_dbg(x, ...) ((void)0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define DBG_BUGON(x) ((void)(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #endif /* !CONFIG_EROFS_FS_DEBUG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* EROFS_SUPER_MAGIC_V1 to represent the whole file system */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define EROFS_SUPER_MAGIC EROFS_SUPER_MAGIC_V1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) typedef u64 erofs_nid_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) typedef u64 erofs_off_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /* data type for filesystem-wide blocks number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) typedef u32 erofs_blk_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct erofs_fs_context {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #ifdef CONFIG_EROFS_FS_ZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* current strategy of how to use managed cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned char cache_strategy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /* strategy of sync decompression (false - auto, true - force on) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) bool readahead_sync_decompress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* threshold for decompression synchronously */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned int max_sync_decompress_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned int mount_opt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* all filesystem-wide lz4 configurations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct erofs_sb_lz4_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* # of pages needed for EROFS lz4 rolling decompression */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u16 max_distance_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* maximum possible blocks for pclusters in the filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u16 max_pclusterblks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct erofs_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #ifdef CONFIG_EROFS_FS_ZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* list for all registered superblocks, mainly for shrinker */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct mutex umount_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* managed XArray arranged in physical block number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct xarray managed_pslots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) unsigned int shrinker_run_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) u16 available_compr_algs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* pseudo inode to manage cached pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct inode *managed_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct erofs_sb_lz4_info lz4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #endif /* CONFIG_EROFS_FS_ZIP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct dax_device *dax_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) u32 blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u32 meta_blkaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #ifdef CONFIG_EROFS_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) u32 xattr_blkaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /* inode slot unit size in bit shift */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned char islotbits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u32 sb_size; /* total superblock size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) u32 build_time_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u64 build_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* what we really care is nid, rather than ino.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) erofs_nid_t root_nid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* used for statfs, f_files - f_favail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) u64 inos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) u8 uuid[16]; /* 128-bit uuid for volume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) u8 volume_name[16]; /* volume name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u32 feature_compat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) u32 feature_incompat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct erofs_fs_context ctx; /* options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define EROFS_SB(sb) ((struct erofs_sb_info *)(sb)->s_fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define EROFS_I_SB(inode) ((struct erofs_sb_info *)(inode)->i_sb->s_fs_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* Mount flags set via mount options or defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define EROFS_MOUNT_XATTR_USER 0x00000010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define EROFS_MOUNT_POSIX_ACL 0x00000020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define EROFS_MOUNT_DAX_ALWAYS 0x00000040
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define EROFS_MOUNT_DAX_NEVER 0x00000080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define clear_opt(ctx, option) ((ctx)->mount_opt &= ~EROFS_MOUNT_##option)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define set_opt(ctx, option) ((ctx)->mount_opt |= EROFS_MOUNT_##option)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define test_opt(ctx, option) ((ctx)->mount_opt & EROFS_MOUNT_##option)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) EROFS_ZIP_CACHE_DISABLED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) EROFS_ZIP_CACHE_READAHEAD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) EROFS_ZIP_CACHE_READAROUND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #ifdef CONFIG_EROFS_FS_ZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define EROFS_LOCKED_MAGIC (INT_MIN | 0xE0F510CCL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* basic unit of the workstation of a super_block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct erofs_workgroup {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* the workgroup index in the workstation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) pgoff_t index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* overall workgroup reference count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) atomic_t refcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #if defined(CONFIG_SMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static inline bool erofs_workgroup_try_to_freeze(struct erofs_workgroup *grp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (val != atomic_cmpxchg(&grp->refcount, val, EROFS_LOCKED_MAGIC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static inline void erofs_workgroup_unfreeze(struct erofs_workgroup *grp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int orig_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * other observers should notice all modifications
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * in the freezing period.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) smp_mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) atomic_set(&grp->refcount, orig_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return atomic_cond_read_relaxed(&grp->refcount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) VAL != EROFS_LOCKED_MAGIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static inline bool erofs_workgroup_try_to_freeze(struct erofs_workgroup *grp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /* no need to spin on UP platforms, let's just disable preemption. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (val != atomic_read(&grp->refcount)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static inline void erofs_workgroup_unfreeze(struct erofs_workgroup *grp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) int orig_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static inline int erofs_wait_on_workgroup_freezed(struct erofs_workgroup *grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) int v = atomic_read(&grp->refcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) /* workgroup is never freezed on uniprocessor systems */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) DBG_BUGON(v == EROFS_LOCKED_MAGIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #endif /* !CONFIG_SMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) #endif /* !CONFIG_EROFS_FS_ZIP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /* we strictly follow PAGE_SIZE and no buffer head yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #define LOG_BLOCK_SIZE PAGE_SHIFT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) #undef LOG_SECTORS_PER_BLOCK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) #define LOG_SECTORS_PER_BLOCK (PAGE_SHIFT - 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) #undef SECTORS_PER_BLOCK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #define SECTORS_PER_BLOCK (1 << SECTORS_PER_BLOCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) #define EROFS_BLKSIZ (1 << LOG_BLOCK_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #if (EROFS_BLKSIZ % 4096 || !EROFS_BLKSIZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #error erofs cannot be used in this platform
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #define ROOT_NID(sb) ((sb)->root_nid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) #define erofs_blknr(addr) ((addr) / EROFS_BLKSIZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #define erofs_blkoff(addr) ((addr) % EROFS_BLKSIZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #define blknr_to_addr(nr) ((erofs_off_t)(nr) * EROFS_BLKSIZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static inline erofs_off_t iloc(struct erofs_sb_info *sbi, erofs_nid_t nid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return blknr_to_addr(sbi->meta_blkaddr) + (nid << sbi->islotbits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) #define EROFS_FEATURE_FUNCS(name, compat, feature) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) static inline bool erofs_sb_has_##name(struct erofs_sb_info *sbi) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return sbi->feature_##compat & EROFS_FEATURE_##feature; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) EROFS_FEATURE_FUNCS(lz4_0padding, incompat, INCOMPAT_LZ4_0PADDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) EROFS_FEATURE_FUNCS(compr_cfgs, incompat, INCOMPAT_COMPR_CFGS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) EROFS_FEATURE_FUNCS(big_pcluster, incompat, INCOMPAT_BIG_PCLUSTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) EROFS_FEATURE_FUNCS(sb_chksum, compat, COMPAT_SB_CHKSUM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) /* atomic flag definitions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) #define EROFS_I_EA_INITED_BIT 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) #define EROFS_I_Z_INITED_BIT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) /* bitlock definitions (arranged in reverse order) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #define EROFS_I_BL_XATTR_BIT (BITS_PER_LONG - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #define EROFS_I_BL_Z_BIT (BITS_PER_LONG - 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct erofs_inode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) erofs_nid_t nid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /* atomic flags (including bitlocks) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) unsigned char datalayout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) unsigned char inode_isize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) unsigned short xattr_isize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) unsigned int xattr_shared_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) unsigned int *xattr_shared_xattrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) erofs_blk_t raw_blkaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) #ifdef CONFIG_EROFS_FS_ZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) unsigned short z_advise;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) unsigned char z_algorithmtype[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) unsigned char z_logical_clusterbits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) #endif /* CONFIG_EROFS_FS_ZIP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* the corresponding vfs inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) #define EROFS_I(ptr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) container_of(ptr, struct erofs_inode, vfs_inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static inline unsigned long erofs_inode_datablocks(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /* since i_size cannot be changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return DIV_ROUND_UP(inode->i_size, EROFS_BLKSIZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static inline unsigned int erofs_bitrange(unsigned int value, unsigned int bit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) unsigned int bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return (value >> bit) & ((1 << bits) - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static inline unsigned int erofs_inode_version(unsigned int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return erofs_bitrange(value, EROFS_I_VERSION_BIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) EROFS_I_VERSION_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static inline unsigned int erofs_inode_datalayout(unsigned int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) return erofs_bitrange(value, EROFS_I_DATALAYOUT_BIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) EROFS_I_DATALAYOUT_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) extern const struct super_operations erofs_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) extern const struct address_space_operations erofs_raw_access_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) extern const struct address_space_operations z_erofs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * Logical to physical block mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * Different with other file systems, it is used for 2 access modes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * 1) RAW access mode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * Users pass a valid (m_lblk, m_lofs -- usually 0) pair,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * and get the valid m_pblk, m_pofs and the longest m_len(in bytes).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * Note that m_lblk in the RAW access mode refers to the number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * the compressed ondisk block rather than the uncompressed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * in-memory block for the compressed file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * m_pofs equals to m_lofs except for the inline data page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * 2) Normal access mode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * If the inode is not compressed, it has no difference with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * the RAW access mode. However, if the inode is compressed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * users should pass a valid (m_lblk, m_lofs) pair, and get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * the needed m_pblk, m_pofs, m_len to get the compressed data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * and the updated m_lblk, m_lofs which indicates the start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * of the corresponding uncompressed data in the file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) BH_Zipped = BH_PrivateStart,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) BH_FullMapped,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) /* Has a disk mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) #define EROFS_MAP_MAPPED (1 << BH_Mapped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /* Located in metadata (could be copied from bd_inode) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) #define EROFS_MAP_META (1 << BH_Meta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /* The extent has been compressed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) #define EROFS_MAP_ZIPPED (1 << BH_Zipped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) /* The length of extent is full */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) #define EROFS_MAP_FULL_MAPPED (1 << BH_FullMapped)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) struct erofs_map_blocks {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) erofs_off_t m_pa, m_la;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) u64 m_plen, m_llen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) unsigned int m_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) struct page *mpage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* Flags used by erofs_map_blocks_flatmode() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) #define EROFS_GET_BLOCKS_RAW 0x0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) /* zmap.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) #ifdef CONFIG_EROFS_FS_ZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) int z_erofs_fill_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) int z_erofs_map_blocks_iter(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) struct erofs_map_blocks *map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static inline int z_erofs_fill_inode(struct inode *inode) { return -EOPNOTSUPP; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) static inline int z_erofs_map_blocks_iter(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct erofs_map_blocks *map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) #endif /* !CONFIG_EROFS_FS_ZIP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* data.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) extern const struct file_operations erofs_file_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) struct page *erofs_get_meta_page(struct super_block *sb, erofs_blk_t blkaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) /* inode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static inline unsigned long erofs_inode_hash(erofs_nid_t nid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) #if BITS_PER_LONG == 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return (nid >> 32) ^ (nid & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return nid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) extern const struct inode_operations erofs_generic_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) extern const struct inode_operations erofs_symlink_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) extern const struct inode_operations erofs_fast_symlink_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid, bool dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int erofs_getattr(const struct path *path, struct kstat *stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) u32 request_mask, unsigned int query_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) /* namei.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) extern const struct inode_operations erofs_dir_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) int erofs_namei(struct inode *dir, struct qstr *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) erofs_nid_t *nid, unsigned int *d_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /* dir.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) extern const struct file_operations erofs_dir_fops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static inline void *erofs_vm_map_ram(struct page **pages, unsigned int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int retried = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) void *p = vm_map_ram(pages, count, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /* retry two more times (totally 3 times) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (p || ++retried >= 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) vm_unmap_aliases();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* pcpubuf.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) void *erofs_get_pcpubuf(unsigned int requiredpages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) void erofs_put_pcpubuf(void *ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) int erofs_pcpubuf_growsize(unsigned int nrpages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) void erofs_pcpubuf_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) void erofs_pcpubuf_exit(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /* utils.c / zdata.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct page *erofs_allocpage(struct list_head *pool, gfp_t gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) #ifdef CONFIG_EROFS_FS_ZIP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) int erofs_workgroup_put(struct erofs_workgroup *grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct erofs_workgroup *erofs_find_workgroup(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) pgoff_t index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct erofs_workgroup *erofs_insert_workgroup(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct erofs_workgroup *grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) void erofs_workgroup_free_rcu(struct erofs_workgroup *grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) void erofs_shrinker_register(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) void erofs_shrinker_unregister(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) int __init erofs_init_shrinker(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) void erofs_exit_shrinker(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) int __init z_erofs_init_zip_subsystem(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) void z_erofs_exit_zip_subsystem(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) int erofs_try_to_free_all_cached_pages(struct erofs_sb_info *sbi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct erofs_workgroup *egrp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) int erofs_try_to_free_cached_page(struct address_space *mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct page *page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int z_erofs_load_lz4_config(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct erofs_super_block *dsb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct z_erofs_lz4_cfgs *lz4, int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) static inline void erofs_shrinker_register(struct super_block *sb) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static inline void erofs_shrinker_unregister(struct super_block *sb) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static inline int erofs_init_shrinker(void) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) static inline void erofs_exit_shrinker(void) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) static inline int z_erofs_init_zip_subsystem(void) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static inline void z_erofs_exit_zip_subsystem(void) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) static inline int z_erofs_load_lz4_config(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct erofs_super_block *dsb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) struct z_erofs_lz4_cfgs *lz4, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (lz4 || dsb->u1.lz4_max_distance) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) erofs_err(sb, "lz4 algorithm isn't enabled");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) #endif /* !CONFIG_EROFS_FS_ZIP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) #endif /* __EROFS_INTERNAL_H */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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