Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  linux/fs/hpfs/hpfs_fn.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  function headers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) //#define DBG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) //#define DEBUG_LOCKS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #ifdef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include "hpfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define EIOERROR  EIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define EFSERROR  EUCLEAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define ANODE_ALLOC_FWD	512
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define FNODE_ALLOC_FWD	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define ALLOC_FWD_MIN	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define ALLOC_FWD_MAX	128
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define ALLOC_M		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define FNODE_RD_AHEAD	16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define ANODE_RD_AHEAD	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define DNODE_RD_AHEAD	72
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define COUNT_RD_AHEAD	62
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define FREE_DNODES_ADD	58
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define FREE_DNODES_DEL	29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #define CHKCOND(x,y) if (!(x)) printk y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) struct hpfs_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	loff_t mmu_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	ino_t i_parent_dir;	/* (directories) gives fnode of parent dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	unsigned i_dno;		/* (directories) root dnode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	unsigned i_dpos;	/* (directories) temp for readdir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	unsigned i_dsubdno;	/* (directories) temp for readdir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	unsigned i_file_sec;	/* (files) minimalist cache of alloc info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	unsigned i_disk_sec;	/* (files) minimalist cache of alloc info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	unsigned i_n_secs;	/* (files) minimalist cache of alloc info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	unsigned i_ea_size;	/* size of extended attributes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	unsigned i_ea_mode : 1;	/* file's permission is stored in ea */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	unsigned i_ea_uid : 1;	/* file's uid is stored in ea */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	unsigned i_ea_gid : 1;	/* file's gid is stored in ea */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	unsigned i_dirty : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	loff_t **i_rddir_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) struct hpfs_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct mutex hpfs_mutex;	/* global hpfs lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	ino_t sb_root;			/* inode number of root dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	unsigned sb_fs_size;		/* file system size, sectors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	unsigned sb_bitmaps;		/* sector number of bitmap list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	unsigned sb_dirband_start;	/* directory band start sector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	unsigned sb_dirband_size;	/* directory band size, dnodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	unsigned sb_dmap;		/* sector number of dnode bit map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	unsigned sb_n_free;		/* free blocks for statfs, or -1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned sb_n_free_dnodes;	/* free dnodes for statfs, or -1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	kuid_t sb_uid;			/* uid from mount options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	kgid_t sb_gid;			/* gid from mount options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	umode_t sb_mode;		/* mode from mount options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	unsigned sb_eas : 2;		/* eas: 0-ignore, 1-ro, 2-rw */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	unsigned sb_err : 2;		/* on errs: 0-cont, 1-ro, 2-panic */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	unsigned sb_chk : 2;		/* checks: 0-no, 1-normal, 2-strict */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	unsigned sb_lowercase : 1;	/* downcase filenames hackery */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	unsigned sb_was_error : 1;	/* there was an error, set dirty flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	unsigned sb_chkdsk : 2;		/* chkdsk: 0-no, 1-on errs, 2-allways */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	unsigned char *sb_cp_table;	/* code page tables: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 					/* 	128 bytes uppercasing table & */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 					/*	128 bytes lowercasing table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	__le32 *sb_bmp_dir;		/* main bitmap directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	unsigned sb_c_bitmap;		/* current bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	unsigned sb_max_fwd_alloc;	/* max forwad allocation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	int sb_timeshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct rcu_head rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	unsigned n_hotfixes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	secno hotfix_from[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	secno hotfix_to[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) /* Four 512-byte buffers and the 2k block obtained by concatenating them */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) struct quad_buffer_head {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct buffer_head *bh[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	void *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* The b-tree down pointer from a dir entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static inline dnode_secno de_down_pointer (struct hpfs_dirent *de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)   CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)   return le32_to_cpu(*(__le32 *) ((void *) de + le16_to_cpu(de->length) - 4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* The first dir entry in a dnode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)   return (void *) dnode->dirent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* The end+1 of the dir entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)   CHKCOND(le32_to_cpu(dnode->first_free)>=0x14 && le32_to_cpu(dnode->first_free)<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %x\n",(unsigned)le32_to_cpu(dnode->first_free)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)   return (void *) dnode + le32_to_cpu(dnode->first_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* The dir entry after dir entry de */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)   CHKCOND(le16_to_cpu(de->length)>=0x20 && le16_to_cpu(de->length)<0x800,("HPFS: de_next_de: de->length = %x\n",(unsigned)le16_to_cpu(de->length)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)   return (void *) de + le16_to_cpu(de->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static inline struct extended_attribute *fnode_ea(struct fnode *fnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static inline struct extended_attribute *fnode_end_ea(struct fnode *fnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s));
^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) static unsigned ea_valuelen(struct extended_attribute *ea)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	return ea->valuelen_lo + 256 * ea->valuelen_hi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static inline struct extended_attribute *next_ea(struct extended_attribute *ea)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea_valuelen(ea));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static inline secno ea_sec(struct extended_attribute *ea)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 9 + ea->namelen)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static inline secno ea_len(struct extended_attribute *ea)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 5 + ea->namelen)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static inline char *ea_data(struct extended_attribute *ea)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	return (char *)((char *)ea + 5 + ea->namelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static inline unsigned de_size(int namelen, secno down_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	int a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (!dst || !src) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	a = dst->down;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	n = dst->not_8x3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	memcpy((char *)dst + 2, (char *)src + 2, 28);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	dst->down = a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	dst->not_8x3 = n;
^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 unsigned tstbits(__le32 *bmp, unsigned b, unsigned n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (!((le32_to_cpu(bmp[(b & 0x3fff) >> 5]) >> (b & 0x1f)) & 1)) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	for (i = 1; i < n; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		if (!((le32_to_cpu(bmp[((b+i) & 0x3fff) >> 5]) >> ((b+i) & 0x1f)) & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			return i + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /* alloc.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int hpfs_chk_sectors(struct super_block *, secno, int, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int hpfs_alloc_if_possible(struct super_block *, secno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) void hpfs_free_sectors(struct super_block *, secno, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int hpfs_check_free_dnodes(struct super_block *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) void hpfs_free_dnode(struct super_block *, secno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) int hpfs_trim_fs(struct super_block *, u64, u64, u64, unsigned *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* anode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) void hpfs_remove_btree(struct super_block *, struct bplus_header *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, const char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* buffer.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) secno hpfs_search_hotfix_map(struct super_block *s, secno sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) unsigned hpfs_search_hotfix_map_for_range(struct super_block *s, secno sec, unsigned n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) void hpfs_prefetch_sectors(struct super_block *, unsigned, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) void hpfs_brelse4(struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) void hpfs_mark_4buffers_dirty(struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* dentry.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) extern const struct dentry_operations hpfs_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* dir.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct dentry *hpfs_lookup(struct inode *, struct dentry *, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) extern const struct file_operations hpfs_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) /* dnode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) int hpfs_add_pos(struct inode *, loff_t *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) void hpfs_del_pos(struct inode *, loff_t *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 				const unsigned char *, unsigned, secno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int hpfs_add_dirent(struct inode *, const unsigned char *, unsigned,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		    struct hpfs_dirent *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct hpfs_dirent *map_dirent(struct inode *, dnode_secno,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			       const unsigned char *, unsigned, dnode_secno *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			       struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) void hpfs_remove_dtree(struct super_block *, dnode_secno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /* ea.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) void hpfs_set_ea(struct inode *, struct fnode *, const char *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		 const char *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /* file.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) int hpfs_file_fsync(struct file *, loff_t, loff_t, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) void hpfs_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) extern const struct file_operations hpfs_file_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) extern const struct inode_operations hpfs_file_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) extern const struct address_space_operations hpfs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) /* inode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) void hpfs_init_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) void hpfs_read_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) void hpfs_write_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) void hpfs_write_inode_nolock(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int hpfs_setattr(struct dentry *, struct iattr *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) void hpfs_write_if_changed(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) void hpfs_evict_inode(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /* map.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) __le32 *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) __le32 *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) void hpfs_prefetch_bitmap(struct super_block *, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) unsigned char *hpfs_load_code_page(struct super_block *, secno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) __le32 *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) void hpfs_load_hotfix_map(struct super_block *s, struct hpfs_spare_block *spareblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) /* name.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) unsigned char hpfs_upcase(unsigned char *, unsigned char);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) int hpfs_chk_name(const unsigned char *, unsigned *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) unsigned char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) int hpfs_compare_names(struct super_block *, const unsigned char *, unsigned,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		       const unsigned char *, unsigned, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) int hpfs_is_name_long(const unsigned char *, unsigned);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) void hpfs_adjust_length(const unsigned char *, unsigned *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* namei.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) extern const struct inode_operations hpfs_dir_iops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) extern const struct address_space_operations hpfs_symlink_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static inline struct hpfs_inode_info *hpfs_i(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	return container_of(inode, struct hpfs_inode_info, vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	return sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* super.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) __printf(2, 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) void hpfs_error(struct super_block *, const char *, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) unsigned hpfs_get_free_dnodes(struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)  * local time (HPFS) to GMT (Unix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static inline time64_t local_to_gmt(struct super_block *s, time64_t t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	extern struct timezone sys_tz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static inline time32_t gmt_to_local(struct super_block *s, time64_t t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	extern struct timezone sys_tz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static inline time32_t local_get_seconds(struct super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	return gmt_to_local(s, ktime_get_real_seconds());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)  * Locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)  * hpfs_lock() locks the whole filesystem. It must be taken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)  * on any method called by the VFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)  * We don't do any per-file locking anymore, it is hard to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)  * review and HPFS is not performance-sensitive anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) static inline void hpfs_lock(struct super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	struct hpfs_sb_info *sbi = hpfs_sb(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	mutex_lock(&sbi->hpfs_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) static inline void hpfs_unlock(struct super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	struct hpfs_sb_info *sbi = hpfs_sb(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	mutex_unlock(&sbi->hpfs_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static inline void hpfs_lock_assert(struct super_block *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	struct hpfs_sb_info *sbi = hpfs_sb(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	WARN_ON(!mutex_is_locked(&sbi->hpfs_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }