307 lines
10 KiB
C
307 lines
10 KiB
C
#ifdef pr_fmt
|
|
#undef pr_fmt
|
|
#endif
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/amigaffs.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
/* Ugly macros make the code more pretty. */
|
|
|
|
#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
|
|
#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
|
|
#define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
|
|
|
|
#define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
|
|
#define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
|
|
#define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
|
|
#define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
|
|
#define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
|
|
#define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
|
|
|
|
#define AFFS_CACHE_SIZE PAGE_SIZE
|
|
|
|
#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
|
|
#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
|
|
#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
|
|
|
|
struct affs_ext_key {
|
|
u32 ext; /* idx of the extended block */
|
|
u32 key; /* block number */
|
|
};
|
|
|
|
/*
|
|
* affs fs inode data in memory
|
|
*/
|
|
struct affs_inode_info {
|
|
atomic_t i_opencnt;
|
|
struct semaphore i_link_lock; /* Protects internal inode access. */
|
|
struct semaphore i_ext_lock; /* Protects internal inode access. */
|
|
#define i_hash_lock i_ext_lock
|
|
u32 i_blkcnt; /* block count */
|
|
u32 i_extcnt; /* extended block count */
|
|
u32 *i_lc; /* linear cache of extended blocks */
|
|
u32 i_lc_size;
|
|
u32 i_lc_shift;
|
|
u32 i_lc_mask;
|
|
struct affs_ext_key *i_ac; /* associative cache of extended blocks */
|
|
u32 i_ext_last; /* last accessed extended block */
|
|
struct buffer_head *i_ext_bh; /* bh of last extended block */
|
|
loff_t mmu_private;
|
|
u32 i_protect; /* unused attribute bits */
|
|
u32 i_lastalloc; /* last allocated block */
|
|
int i_pa_cnt; /* number of preallocated blocks */
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
/* short cut to get to the affs specific inode data */
|
|
static inline struct affs_inode_info *AFFS_I(struct inode *inode)
|
|
{
|
|
return list_entry(inode, struct affs_inode_info, vfs_inode);
|
|
}
|
|
|
|
/*
|
|
* super-block data in memory
|
|
*
|
|
* Block numbers are adjusted for their actual size
|
|
*
|
|
*/
|
|
|
|
struct affs_bm_info {
|
|
u32 bm_key; /* Disk block number */
|
|
u32 bm_free; /* Free blocks in here */
|
|
};
|
|
|
|
struct affs_sb_info {
|
|
int s_partition_size; /* Partition size in blocks. */
|
|
int s_reserved; /* Number of reserved blocks. */
|
|
//u32 s_blksize; /* Initial device blksize */
|
|
u32 s_data_blksize; /* size of the data block w/o header */
|
|
u32 s_root_block; /* FFS root block number. */
|
|
int s_hashsize; /* Size of hash table. */
|
|
unsigned long s_flags; /* See below. */
|
|
kuid_t s_uid; /* uid to override */
|
|
kgid_t s_gid; /* gid to override */
|
|
umode_t s_mode; /* mode to override */
|
|
struct buffer_head *s_root_bh; /* Cached root block. */
|
|
struct mutex s_bmlock; /* Protects bitmap access. */
|
|
struct affs_bm_info *s_bitmap; /* Bitmap infos. */
|
|
u32 s_bmap_count; /* # of bitmap blocks. */
|
|
u32 s_bmap_bits; /* # of bits in one bitmap blocks */
|
|
u32 s_last_bmap;
|
|
struct buffer_head *s_bmap_bh;
|
|
char *s_prefix; /* Prefix for volumes and assigns. */
|
|
char s_volume[32]; /* Volume prefix for absolute symlinks. */
|
|
spinlock_t symlink_lock; /* protects the previous two */
|
|
struct super_block *sb; /* the VFS superblock object */
|
|
int work_queued; /* non-zero delayed work is queued */
|
|
struct delayed_work sb_work; /* superblock flush delayed work */
|
|
spinlock_t work_lock; /* protects sb_work and work_queued */
|
|
};
|
|
|
|
#define SF_INTL 0x0001 /* International filesystem. */
|
|
#define SF_BM_VALID 0x0002 /* Bitmap is valid. */
|
|
#define SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
|
|
#define SF_QUIET 0x0008 /* chmod errors will be not reported */
|
|
#define SF_SETUID 0x0010 /* Ignore Amiga uid */
|
|
#define SF_SETGID 0x0020 /* Ignore Amiga gid */
|
|
#define SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
|
|
#define SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
|
|
#define SF_OFS 0x0200 /* Old filesystem */
|
|
#define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
|
|
#define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
|
|
#define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
|
|
|
|
/* short cut to get to the affs specific sb data */
|
|
static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
|
|
{
|
|
return sb->s_fs_info;
|
|
}
|
|
|
|
void affs_mark_sb_dirty(struct super_block *sb);
|
|
|
|
/* amigaffs.c */
|
|
|
|
extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);
|
|
extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
|
|
extern int affs_remove_header(struct dentry *dentry);
|
|
extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
|
|
extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
|
|
extern void secs_to_datestamp(time_t secs, struct affs_date *ds);
|
|
extern umode_t prot_to_mode(u32 prot);
|
|
extern void mode_to_prot(struct inode *inode);
|
|
extern void affs_error(struct super_block *sb, const char *function,
|
|
const char *fmt, ...);
|
|
extern void affs_warning(struct super_block *sb, const char *function,
|
|
const char *fmt, ...);
|
|
extern bool affs_nofilenametruncate(const struct dentry *dentry);
|
|
extern int affs_check_name(const unsigned char *name, int len,
|
|
bool notruncate);
|
|
extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
|
|
|
|
/* bitmap. c */
|
|
|
|
extern u32 affs_count_free_blocks(struct super_block *s);
|
|
extern void affs_free_block(struct super_block *sb, u32 block);
|
|
extern u32 affs_alloc_block(struct inode *inode, u32 goal);
|
|
extern int affs_init_bitmap(struct super_block *sb, int *flags);
|
|
extern void affs_free_bitmap(struct super_block *sb);
|
|
|
|
/* namei.c */
|
|
|
|
extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
|
|
extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
|
|
extern int affs_unlink(struct inode *dir, struct dentry *dentry);
|
|
extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
|
|
extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
|
|
extern int affs_rmdir(struct inode *dir, struct dentry *dentry);
|
|
extern int affs_link(struct dentry *olddentry, struct inode *dir,
|
|
struct dentry *dentry);
|
|
extern int affs_symlink(struct inode *dir, struct dentry *dentry,
|
|
const char *symname);
|
|
extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
struct inode *new_dir, struct dentry *new_dentry);
|
|
|
|
/* inode.c */
|
|
|
|
extern unsigned long affs_parent_ino(struct inode *dir);
|
|
extern struct inode *affs_new_inode(struct inode *dir);
|
|
extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
|
|
extern void affs_evict_inode(struct inode *inode);
|
|
extern struct inode *affs_iget(struct super_block *sb,
|
|
unsigned long ino);
|
|
extern int affs_write_inode(struct inode *inode,
|
|
struct writeback_control *wbc);
|
|
extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
|
|
|
|
/* file.c */
|
|
|
|
void affs_free_prealloc(struct inode *inode);
|
|
extern void affs_truncate(struct inode *);
|
|
int affs_file_fsync(struct file *, loff_t, loff_t, int);
|
|
|
|
/* dir.c */
|
|
|
|
extern void affs_dir_truncate(struct inode *);
|
|
|
|
/* jump tables */
|
|
|
|
extern const struct inode_operations affs_file_inode_operations;
|
|
extern const struct inode_operations affs_dir_inode_operations;
|
|
extern const struct inode_operations affs_symlink_inode_operations;
|
|
extern const struct file_operations affs_file_operations;
|
|
extern const struct file_operations affs_file_operations_ofs;
|
|
extern const struct file_operations affs_dir_operations;
|
|
extern const struct address_space_operations affs_symlink_aops;
|
|
extern const struct address_space_operations affs_aops;
|
|
extern const struct address_space_operations affs_aops_ofs;
|
|
|
|
extern const struct dentry_operations affs_dentry_operations;
|
|
extern const struct dentry_operations affs_intl_dentry_operations;
|
|
|
|
static inline void
|
|
affs_set_blocksize(struct super_block *sb, int size)
|
|
{
|
|
sb_set_blocksize(sb, size);
|
|
}
|
|
static inline struct buffer_head *
|
|
affs_bread(struct super_block *sb, int block)
|
|
{
|
|
pr_debug("affs_bread: %d\n", block);
|
|
if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
|
|
return sb_bread(sb, block);
|
|
return NULL;
|
|
}
|
|
static inline struct buffer_head *
|
|
affs_getblk(struct super_block *sb, int block)
|
|
{
|
|
pr_debug("affs_getblk: %d\n", block);
|
|
if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
|
|
return sb_getblk(sb, block);
|
|
return NULL;
|
|
}
|
|
static inline struct buffer_head *
|
|
affs_getzeroblk(struct super_block *sb, int block)
|
|
{
|
|
struct buffer_head *bh;
|
|
pr_debug("affs_getzeroblk: %d\n", block);
|
|
if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
|
|
bh = sb_getblk(sb, block);
|
|
lock_buffer(bh);
|
|
memset(bh->b_data, 0 , sb->s_blocksize);
|
|
set_buffer_uptodate(bh);
|
|
unlock_buffer(bh);
|
|
return bh;
|
|
}
|
|
return NULL;
|
|
}
|
|
static inline struct buffer_head *
|
|
affs_getemptyblk(struct super_block *sb, int block)
|
|
{
|
|
struct buffer_head *bh;
|
|
pr_debug("affs_getemptyblk: %d\n", block);
|
|
if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
|
|
bh = sb_getblk(sb, block);
|
|
wait_on_buffer(bh);
|
|
set_buffer_uptodate(bh);
|
|
return bh;
|
|
}
|
|
return NULL;
|
|
}
|
|
static inline void
|
|
affs_brelse(struct buffer_head *bh)
|
|
{
|
|
if (bh)
|
|
pr_debug("affs_brelse: %lld\n", (long long) bh->b_blocknr);
|
|
brelse(bh);
|
|
}
|
|
|
|
static inline void
|
|
affs_adjust_checksum(struct buffer_head *bh, u32 val)
|
|
{
|
|
u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
|
|
((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
|
|
}
|
|
static inline void
|
|
affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
|
|
{
|
|
u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
|
|
((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
|
|
}
|
|
|
|
static inline void
|
|
affs_lock_link(struct inode *inode)
|
|
{
|
|
down(&AFFS_I(inode)->i_link_lock);
|
|
}
|
|
static inline void
|
|
affs_unlock_link(struct inode *inode)
|
|
{
|
|
up(&AFFS_I(inode)->i_link_lock);
|
|
}
|
|
static inline void
|
|
affs_lock_dir(struct inode *inode)
|
|
{
|
|
down(&AFFS_I(inode)->i_hash_lock);
|
|
}
|
|
static inline void
|
|
affs_unlock_dir(struct inode *inode)
|
|
{
|
|
up(&AFFS_I(inode)->i_hash_lock);
|
|
}
|
|
static inline void
|
|
affs_lock_ext(struct inode *inode)
|
|
{
|
|
down(&AFFS_I(inode)->i_ext_lock);
|
|
}
|
|
static inline void
|
|
affs_unlock_ext(struct inode *inode)
|
|
{
|
|
up(&AFFS_I(inode)->i_ext_lock);
|
|
}
|