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Fabian Frederick0158de12014-06-06 14:37:24 -07001#ifdef pr_fmt
2#undef pr_fmt
3#endif
4
5#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/types.h>
8#include <linux/fs.h>
9#include <linux/buffer_head.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/amigaffs.h>
Matthias Kaehlcke7d135a52008-07-25 19:44:51 -070011#include <linux/mutex.h>
Artem Bityutskiy3dd84782012-06-06 18:56:57 +030012#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
Linus Torvalds1da177e2005-04-16 15:20:36 -070014/* Ugly macros make the code more pretty. */
15
16#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
17#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
18#define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)])
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
21#define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
22#define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
23#define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
24#define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
25#define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
26
27#define AFFS_CACHE_SIZE PAGE_SIZE
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#define AFFS_LC_SIZE (AFFS_CACHE_SIZE/sizeof(u32)/2)
30#define AFFS_AC_SIZE (AFFS_CACHE_SIZE/sizeof(struct affs_ext_key)/2)
31#define AFFS_AC_MASK (AFFS_AC_SIZE-1)
32
33struct affs_ext_key {
34 u32 ext; /* idx of the extended block */
35 u32 key; /* block number */
36};
37
38/*
39 * affs fs inode data in memory
40 */
41struct affs_inode_info {
Roman Zippeldca3c332008-04-29 17:02:20 +020042 atomic_t i_opencnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 struct semaphore i_link_lock; /* Protects internal inode access. */
44 struct semaphore i_ext_lock; /* Protects internal inode access. */
45#define i_hash_lock i_ext_lock
46 u32 i_blkcnt; /* block count */
47 u32 i_extcnt; /* extended block count */
48 u32 *i_lc; /* linear cache of extended blocks */
49 u32 i_lc_size;
50 u32 i_lc_shift;
51 u32 i_lc_mask;
52 struct affs_ext_key *i_ac; /* associative cache of extended blocks */
53 u32 i_ext_last; /* last accessed extended block */
54 struct buffer_head *i_ext_bh; /* bh of last extended block */
55 loff_t mmu_private;
56 u32 i_protect; /* unused attribute bits */
57 u32 i_lastalloc; /* last allocated block */
58 int i_pa_cnt; /* number of preallocated blocks */
59 struct inode vfs_inode;
60};
61
62/* short cut to get to the affs specific inode data */
63static inline struct affs_inode_info *AFFS_I(struct inode *inode)
64{
65 return list_entry(inode, struct affs_inode_info, vfs_inode);
66}
67
68/*
69 * super-block data in memory
70 *
71 * Block numbers are adjusted for their actual size
72 *
73 */
74
75struct affs_bm_info {
76 u32 bm_key; /* Disk block number */
77 u32 bm_free; /* Free blocks in here */
78};
79
80struct affs_sb_info {
81 int s_partition_size; /* Partition size in blocks. */
82 int s_reserved; /* Number of reserved blocks. */
83 //u32 s_blksize; /* Initial device blksize */
84 u32 s_data_blksize; /* size of the data block w/o header */
85 u32 s_root_block; /* FFS root block number. */
86 int s_hashsize; /* Size of hash table. */
87 unsigned long s_flags; /* See below. */
Eric W. Biederman8fed10b2012-02-07 16:20:16 -080088 kuid_t s_uid; /* uid to override */
89 kgid_t s_gid; /* gid to override */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 umode_t s_mode; /* mode to override */
91 struct buffer_head *s_root_bh; /* Cached root block. */
Matthias Kaehlcke7d135a52008-07-25 19:44:51 -070092 struct mutex s_bmlock; /* Protects bitmap access. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 struct affs_bm_info *s_bitmap; /* Bitmap infos. */
94 u32 s_bmap_count; /* # of bitmap blocks. */
95 u32 s_bmap_bits; /* # of bits in one bitmap blocks */
96 u32 s_last_bmap;
97 struct buffer_head *s_bmap_bh;
98 char *s_prefix; /* Prefix for volumes and assigns. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 char s_volume[32]; /* Volume prefix for absolute symlinks. */
Al Viro29333922010-01-24 00:04:07 -0500100 spinlock_t symlink_lock; /* protects the previous two */
Artem Bityutskiya215fef2012-06-06 18:56:56 +0300101 struct super_block *sb; /* the VFS superblock object */
Artem Bityutskiy3dd84782012-06-06 18:56:57 +0300102 int work_queued; /* non-zero delayed work is queued */
103 struct delayed_work sb_work; /* superblock flush delayed work */
104 spinlock_t work_lock; /* protects sb_work and work_queued */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105};
106
107#define SF_INTL 0x0001 /* International filesystem. */
108#define SF_BM_VALID 0x0002 /* Bitmap is valid. */
109#define SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
110#define SF_QUIET 0x0008 /* chmod errors will be not reported */
111#define SF_SETUID 0x0010 /* Ignore Amiga uid */
112#define SF_SETGID 0x0020 /* Ignore Amiga gid */
113#define SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
114#define SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
115#define SF_OFS 0x0200 /* Old filesystem */
116#define SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
117#define SF_VERBOSE 0x0800 /* Talk about fs when mounting */
Fabian Frederick8ca57722014-04-07 15:39:01 -0700118#define SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
120/* short cut to get to the affs specific sb data */
121static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
122{
123 return sb->s_fs_info;
124}
125
Artem Bityutskiy3dd84782012-06-06 18:56:57 +0300126void affs_mark_sb_dirty(struct super_block *sb);
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128/* amigaffs.c */
129
130extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);
131extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
132extern int affs_remove_header(struct dentry *dentry);
133extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
134extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
135extern void secs_to_datestamp(time_t secs, struct affs_date *ds);
Al Viroa760b032011-07-26 03:04:30 -0400136extern umode_t prot_to_mode(u32 prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137extern void mode_to_prot(struct inode *inode);
Fabian Frederick8ca57722014-04-07 15:39:01 -0700138extern void affs_error(struct super_block *sb, const char *function,
139 const char *fmt, ...);
140extern void affs_warning(struct super_block *sb, const char *function,
141 const char *fmt, ...);
142extern bool affs_nofilenametruncate(const struct dentry *dentry);
143extern int affs_check_name(const unsigned char *name, int len,
144 bool notruncate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
146
147/* bitmap. c */
148
149extern u32 affs_count_free_blocks(struct super_block *s);
150extern void affs_free_block(struct super_block *sb, u32 block);
151extern u32 affs_alloc_block(struct inode *inode, u32 goal);
152extern int affs_init_bitmap(struct super_block *sb, int *flags);
153extern void affs_free_bitmap(struct super_block *sb);
154
155/* namei.c */
156
157extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
Al Viro00cd8dd2012-06-10 17:13:09 -0400158extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159extern int affs_unlink(struct inode *dir, struct dentry *dentry);
Al Viroebfc3b42012-06-10 18:05:36 -0400160extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
Al Viro18bb1db2011-07-26 01:41:39 -0400161extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162extern int affs_rmdir(struct inode *dir, struct dentry *dentry);
163extern int affs_link(struct dentry *olddentry, struct inode *dir,
164 struct dentry *dentry);
165extern int affs_symlink(struct inode *dir, struct dentry *dentry,
166 const char *symname);
167extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry,
168 struct inode *new_dir, struct dentry *new_dentry);
169
170/* inode.c */
171
172extern unsigned long affs_parent_ino(struct inode *dir);
173extern struct inode *affs_new_inode(struct inode *dir);
174extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
Al Virof053ddd2010-06-06 10:16:41 -0400175extern void affs_evict_inode(struct inode *inode);
David Howells210f8552008-02-07 00:15:29 -0800176extern struct inode *affs_iget(struct super_block *sb,
177 unsigned long ino);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100178extern int affs_write_inode(struct inode *inode,
179 struct writeback_control *wbc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
181
182/* file.c */
183
184void affs_free_prealloc(struct inode *inode);
185extern void affs_truncate(struct inode *);
Josef Bacik02c24a82011-07-16 20:44:56 -0400186int affs_file_fsync(struct file *, loff_t, loff_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188/* dir.c */
189
190extern void affs_dir_truncate(struct inode *);
191
192/* jump tables */
193
Arjan van de Ven754661f2007-02-12 00:55:38 -0800194extern const struct inode_operations affs_file_inode_operations;
195extern const struct inode_operations affs_dir_inode_operations;
196extern const struct inode_operations affs_symlink_inode_operations;
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800197extern const struct file_operations affs_file_operations;
198extern const struct file_operations affs_file_operations_ofs;
199extern const struct file_operations affs_dir_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700200extern const struct address_space_operations affs_symlink_aops;
201extern const struct address_space_operations affs_aops;
202extern const struct address_space_operations affs_aops_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Al Viroe16404e2009-02-20 05:55:13 +0000204extern const struct dentry_operations affs_dentry_operations;
Al Viroa1298802011-01-12 16:45:19 -0500205extern const struct dentry_operations affs_intl_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207static inline void
208affs_set_blocksize(struct super_block *sb, int size)
209{
210 sb_set_blocksize(sb, size);
211}
212static inline struct buffer_head *
213affs_bread(struct super_block *sb, int block)
214{
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700215 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
217 return sb_bread(sb, block);
218 return NULL;
219}
220static inline struct buffer_head *
221affs_getblk(struct super_block *sb, int block)
222{
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700223 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
225 return sb_getblk(sb, block);
226 return NULL;
227}
228static inline struct buffer_head *
229affs_getzeroblk(struct super_block *sb, int block)
230{
231 struct buffer_head *bh;
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700232 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
234 bh = sb_getblk(sb, block);
235 lock_buffer(bh);
236 memset(bh->b_data, 0 , sb->s_blocksize);
237 set_buffer_uptodate(bh);
238 unlock_buffer(bh);
239 return bh;
240 }
241 return NULL;
242}
243static inline struct buffer_head *
244affs_getemptyblk(struct super_block *sb, int block)
245{
246 struct buffer_head *bh;
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700247 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
249 bh = sb_getblk(sb, block);
250 wait_on_buffer(bh);
251 set_buffer_uptodate(bh);
252 return bh;
253 }
254 return NULL;
255}
256static inline void
257affs_brelse(struct buffer_head *bh)
258{
259 if (bh)
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700260 pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 brelse(bh);
262}
263
264static inline void
265affs_adjust_checksum(struct buffer_head *bh, u32 val)
266{
267 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
268 ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
269}
270static inline void
271affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
272{
273 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
274 ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
275}
276
277static inline void
278affs_lock_link(struct inode *inode)
279{
280 down(&AFFS_I(inode)->i_link_lock);
281}
282static inline void
283affs_unlock_link(struct inode *inode)
284{
285 up(&AFFS_I(inode)->i_link_lock);
286}
287static inline void
288affs_lock_dir(struct inode *inode)
289{
290 down(&AFFS_I(inode)->i_hash_lock);
291}
292static inline void
293affs_unlock_dir(struct inode *inode)
294{
295 up(&AFFS_I(inode)->i_hash_lock);
296}
297static inline void
298affs_lock_ext(struct inode *inode)
299{
300 down(&AFFS_I(inode)->i_ext_lock);
301}
302static inline void
303affs_unlock_ext(struct inode *inode)
304{
305 up(&AFFS_I(inode)->i_ext_lock);
306}