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) #ifdef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "amigaffs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) /* Ugly macros make the code more pretty. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #define GET_END_PTR(st,p,sz)		 ((st *)((char *)(p)+((sz)-sizeof(st))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define AFFS_BLOCK(sb, bh, blk)		(AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define AFFS_HEAD(bh)		((struct affs_head *)(bh)->b_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define AFFS_TAIL(sb, bh)	((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define AFFS_ROOT_HEAD(bh)	((struct affs_root_head *)(bh)->b_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define AFFS_ROOT_TAIL(sb, bh)	((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define AFFS_DATA_HEAD(bh)	((struct affs_data_head *)(bh)->b_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define AFFS_DATA(bh)		(((struct affs_data_head *)(bh)->b_data)->data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define AFFS_CACHE_SIZE		PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define AFFS_LC_SIZE		(AFFS_CACHE_SIZE/sizeof(u32)/2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define AFFS_AC_SIZE		(AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define AFFS_AC_MASK		(AFFS_AC_SIZE-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define AFFSNAMEMAX 30U
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) struct affs_ext_key {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	u32	ext;				/* idx of the extended block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	u32	key;				/* block number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * affs fs inode data in memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) struct affs_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	atomic_t i_opencnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct mutex i_link_lock;		/* Protects internal inode access. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct mutex i_ext_lock;		/* Protects internal inode access. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #define i_hash_lock i_ext_lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	u32	 i_blkcnt;			/* block count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	u32	 i_extcnt;			/* extended block count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	u32	*i_lc;				/* linear cache of extended blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	u32	 i_lc_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	u32	 i_lc_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	u32	 i_lc_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct affs_ext_key *i_ac;		/* associative cache of extended blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	u32	 i_ext_last;			/* last accessed extended block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct buffer_head *i_ext_bh;		/* bh of last extended block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	loff_t	 mmu_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	u32	 i_protect;			/* unused attribute bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	u32	 i_lastalloc;			/* last allocated block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int	 i_pa_cnt;			/* number of preallocated blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) /* short cut to get to the affs specific inode data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static inline struct affs_inode_info *AFFS_I(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return container_of(inode, struct affs_inode_info, vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72)  * super-block data in memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  * Block numbers are adjusted for their actual size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) struct affs_bm_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	u32 bm_key;			/* Disk block number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	u32 bm_free;			/* Free blocks in here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) struct affs_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	int s_partition_size;		/* Partition size in blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	int s_reserved;			/* Number of reserved blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	//u32 s_blksize;			/* Initial device blksize */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	u32 s_data_blksize;		/* size of the data block w/o header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	u32 s_root_block;		/* FFS root block number. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	int s_hashsize;			/* Size of hash table. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	unsigned long s_flags;		/* See below. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	kuid_t s_uid;			/* uid to override */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	kgid_t s_gid;			/* gid to override */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	umode_t s_mode;			/* mode to override */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	struct buffer_head *s_root_bh;	/* Cached root block. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct mutex s_bmlock;		/* Protects bitmap access. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct affs_bm_info *s_bitmap;	/* Bitmap infos. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	u32 s_bmap_count;		/* # of bitmap blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	u32 s_bmap_bits;		/* # of bits in one bitmap blocks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	u32 s_last_bmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct buffer_head *s_bmap_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	char *s_prefix;			/* Prefix for volumes and assigns. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	char s_volume[32];		/* Volume prefix for absolute symlinks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	spinlock_t symlink_lock;	/* protects the previous two */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct super_block *sb;		/* the VFS superblock object */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	int work_queued;		/* non-zero delayed work is queued */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct delayed_work sb_work;	/* superblock flush delayed work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	spinlock_t work_lock;		/* protects sb_work and work_queued */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define AFFS_MOUNT_SF_INTL		0x0001 /* International filesystem. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define AFFS_MOUNT_SF_BM_VALID		0x0002 /* Bitmap is valid. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define AFFS_MOUNT_SF_IMMUTABLE		0x0004 /* Protection bits cannot be changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define AFFS_MOUNT_SF_QUIET		0x0008 /* chmod errors will be not reported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define AFFS_MOUNT_SF_SETUID		0x0010 /* Ignore Amiga uid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define AFFS_MOUNT_SF_SETGID		0x0020 /* Ignore Amiga gid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define AFFS_MOUNT_SF_SETMODE		0x0040 /* Ignore Amiga protection bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define AFFS_MOUNT_SF_MUFS		0x0100 /* Use MUFS uid/gid mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define AFFS_MOUNT_SF_OFS		0x0200 /* Old filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define AFFS_MOUNT_SF_PREFIX		0x0400 /* Buffer for prefix is allocated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define AFFS_MOUNT_SF_VERBOSE		0x0800 /* Talk about fs when mounting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define AFFS_MOUNT_SF_NO_TRUNCATE	0x1000 /* Don't truncate filenames */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #define affs_clear_opt(o, opt)    (o &= ~AFFS_MOUNT_##opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define affs_set_opt(o, opt)      (o |= AFFS_MOUNT_##opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define affs_test_opt(o, opt)     ((o) & AFFS_MOUNT_##opt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* short cut to get to the affs specific sb data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	return sb->s_fs_info;
^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) void affs_mark_sb_dirty(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* amigaffs.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) extern int	affs_insert_hash(struct inode *inode, struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) extern int	affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) extern int	affs_remove_header(struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) extern u32	affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) extern void	affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) extern void	affs_secs_to_datestamp(time64_t secs, struct affs_date *ds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) extern umode_t	affs_prot_to_mode(u32 prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) extern void	affs_mode_to_prot(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) __printf(3, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) extern void	affs_error(struct super_block *sb, const char *function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			   const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) __printf(3, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) extern void	affs_warning(struct super_block *sb, const char *function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			     const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) extern bool	affs_nofilenametruncate(const struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) extern int	affs_check_name(const unsigned char *name, int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 				bool notruncate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) extern int	affs_copy_name(unsigned char *bstr, struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* bitmap. c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) extern u32	affs_count_free_blocks(struct super_block *s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) extern void	affs_free_block(struct super_block *sb, u32 block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) extern u32	affs_alloc_block(struct inode *inode, u32 goal);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) extern int	affs_init_bitmap(struct super_block *sb, int *flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) extern void	affs_free_bitmap(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* namei.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) extern const struct export_operations affs_export_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) extern int	affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) extern int	affs_unlink(struct inode *dir, struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) extern int	affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) extern int	affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) extern int	affs_rmdir(struct inode *dir, struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) extern int	affs_link(struct dentry *olddentry, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 			  struct dentry *dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) extern int	affs_symlink(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			     const char *symname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) extern int	affs_rename2(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			    struct inode *new_dir, struct dentry *new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			    unsigned int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* inode.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) extern struct inode		*affs_new_inode(struct inode *dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) extern int			 affs_notify_change(struct dentry *dentry, struct iattr *attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) extern void			 affs_evict_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) extern struct inode		*affs_iget(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 					unsigned long ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) extern int			 affs_write_inode(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 					struct writeback_control *wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) extern int			 affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /* file.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) void		affs_free_prealloc(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) extern void	affs_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int		affs_file_fsync(struct file *, loff_t, loff_t, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /* dir.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) extern void   affs_dir_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /* jump tables */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) extern const struct inode_operations	 affs_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) extern const struct inode_operations	 affs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) extern const struct inode_operations   affs_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) extern const struct file_operations	 affs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) extern const struct file_operations	 affs_file_operations_ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) extern const struct file_operations	 affs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) extern const struct address_space_operations	 affs_symlink_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) extern const struct address_space_operations	 affs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) extern const struct address_space_operations	 affs_aops_ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) extern const struct dentry_operations	 affs_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) extern const struct dentry_operations	 affs_intl_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static inline bool affs_validblock(struct super_block *sb, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	return(block >= AFFS_SB(sb)->s_reserved &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	       block < AFFS_SB(sb)->s_partition_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) affs_set_blocksize(struct super_block *sb, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	sb_set_blocksize(sb, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) affs_bread(struct super_block *sb, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	pr_debug("%s: %d\n", __func__, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (affs_validblock(sb, block))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		return sb_bread(sb, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) affs_getblk(struct super_block *sb, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	pr_debug("%s: %d\n", __func__, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	if (affs_validblock(sb, block))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		return sb_getblk(sb, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) affs_getzeroblk(struct super_block *sb, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	pr_debug("%s: %d\n", __func__, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (affs_validblock(sb, block)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		bh = sb_getblk(sb, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		lock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		memset(bh->b_data, 0 , sb->s_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		set_buffer_uptodate(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		unlock_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static inline struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) affs_getemptyblk(struct super_block *sb, int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	pr_debug("%s: %d\n", __func__, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (affs_validblock(sb, block)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		bh = sb_getblk(sb, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		wait_on_buffer(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		set_buffer_uptodate(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) affs_brelse(struct buffer_head *bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	if (bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) affs_adjust_checksum(struct buffer_head *bh, u32 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
^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 void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) affs_lock_link(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	mutex_lock(&AFFS_I(inode)->i_link_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) affs_unlock_link(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	mutex_unlock(&AFFS_I(inode)->i_link_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) affs_lock_dir(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	mutex_lock_nested(&AFFS_I(inode)->i_hash_lock, SINGLE_DEPTH_NESTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) affs_unlock_dir(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	mutex_unlock(&AFFS_I(inode)->i_hash_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) affs_lock_ext(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	mutex_lock(&AFFS_I(inode)->i_ext_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) affs_unlock_ext(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	mutex_unlock(&AFFS_I(inode)->i_ext_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }