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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
Fabian Frederickf1578532015-02-17 13:46:23 -080033#define AFFSNAMEMAX 30U
34
Linus Torvalds1da177e2005-04-16 15:20:36 -070035struct affs_ext_key {
36 u32 ext; /* idx of the extended block */
37 u32 key; /* block number */
38};
39
40/*
41 * affs fs inode data in memory
42 */
43struct affs_inode_info {
Roman Zippeldca3c332008-04-29 17:02:20 +020044 atomic_t i_opencnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 struct semaphore i_link_lock; /* Protects internal inode access. */
46 struct semaphore i_ext_lock; /* Protects internal inode access. */
47#define i_hash_lock i_ext_lock
48 u32 i_blkcnt; /* block count */
49 u32 i_extcnt; /* extended block count */
50 u32 *i_lc; /* linear cache of extended blocks */
51 u32 i_lc_size;
52 u32 i_lc_shift;
53 u32 i_lc_mask;
54 struct affs_ext_key *i_ac; /* associative cache of extended blocks */
55 u32 i_ext_last; /* last accessed extended block */
56 struct buffer_head *i_ext_bh; /* bh of last extended block */
57 loff_t mmu_private;
58 u32 i_protect; /* unused attribute bits */
59 u32 i_lastalloc; /* last allocated block */
60 int i_pa_cnt; /* number of preallocated blocks */
61 struct inode vfs_inode;
62};
63
64/* short cut to get to the affs specific inode data */
65static inline struct affs_inode_info *AFFS_I(struct inode *inode)
66{
Rasmus Villemoesdb6172c2015-03-19 12:28:04 +010067 return container_of(inode, struct affs_inode_info, vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068}
69
70/*
71 * super-block data in memory
72 *
73 * Block numbers are adjusted for their actual size
74 *
75 */
76
77struct affs_bm_info {
78 u32 bm_key; /* Disk block number */
79 u32 bm_free; /* Free blocks in here */
80};
81
82struct affs_sb_info {
83 int s_partition_size; /* Partition size in blocks. */
84 int s_reserved; /* Number of reserved blocks. */
85 //u32 s_blksize; /* Initial device blksize */
86 u32 s_data_blksize; /* size of the data block w/o header */
87 u32 s_root_block; /* FFS root block number. */
88 int s_hashsize; /* Size of hash table. */
89 unsigned long s_flags; /* See below. */
Eric W. Biederman8fed10b2012-02-07 16:20:16 -080090 kuid_t s_uid; /* uid to override */
91 kgid_t s_gid; /* gid to override */
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 umode_t s_mode; /* mode to override */
93 struct buffer_head *s_root_bh; /* Cached root block. */
Matthias Kaehlcke7d135a52008-07-25 19:44:51 -070094 struct mutex s_bmlock; /* Protects bitmap access. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 struct affs_bm_info *s_bitmap; /* Bitmap infos. */
96 u32 s_bmap_count; /* # of bitmap blocks. */
97 u32 s_bmap_bits; /* # of bits in one bitmap blocks */
98 u32 s_last_bmap;
99 struct buffer_head *s_bmap_bh;
100 char *s_prefix; /* Prefix for volumes and assigns. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 char s_volume[32]; /* Volume prefix for absolute symlinks. */
Al Viro29333922010-01-24 00:04:07 -0500102 spinlock_t symlink_lock; /* protects the previous two */
Artem Bityutskiya215fef2012-06-06 18:56:56 +0300103 struct super_block *sb; /* the VFS superblock object */
Artem Bityutskiy3dd84782012-06-06 18:56:57 +0300104 int work_queued; /* non-zero delayed work is queued */
105 struct delayed_work sb_work; /* superblock flush delayed work */
106 spinlock_t work_lock; /* protects sb_work and work_queued */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107};
108
Fabian Fredericka0016ff2015-04-16 12:48:15 -0700109#define AFFS_MOUNT_SF_INTL 0x0001 /* International filesystem. */
110#define AFFS_MOUNT_SF_BM_VALID 0x0002 /* Bitmap is valid. */
111#define AFFS_MOUNT_SF_IMMUTABLE 0x0004 /* Protection bits cannot be changed */
112#define AFFS_MOUNT_SF_QUIET 0x0008 /* chmod errors will be not reported */
113#define AFFS_MOUNT_SF_SETUID 0x0010 /* Ignore Amiga uid */
114#define AFFS_MOUNT_SF_SETGID 0x0020 /* Ignore Amiga gid */
115#define AFFS_MOUNT_SF_SETMODE 0x0040 /* Ignore Amiga protection bits */
116#define AFFS_MOUNT_SF_MUFS 0x0100 /* Use MUFS uid/gid mapping */
117#define AFFS_MOUNT_SF_OFS 0x0200 /* Old filesystem */
118#define AFFS_MOUNT_SF_PREFIX 0x0400 /* Buffer for prefix is allocated */
119#define AFFS_MOUNT_SF_VERBOSE 0x0800 /* Talk about fs when mounting */
120#define AFFS_MOUNT_SF_NO_TRUNCATE 0x1000 /* Don't truncate filenames */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Fabian Frederick6bf445c2015-04-16 12:48:18 -0700122#define affs_clear_opt(o, opt) (o &= ~AFFS_MOUNT_##opt)
123#define affs_set_opt(o, opt) (o |= AFFS_MOUNT_##opt)
124#define affs_test_opt(o, opt) ((o) & AFFS_MOUNT_##opt)
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126/* short cut to get to the affs specific sb data */
127static inline struct affs_sb_info *AFFS_SB(struct super_block *sb)
128{
129 return sb->s_fs_info;
130}
131
Artem Bityutskiy3dd84782012-06-06 18:56:57 +0300132void affs_mark_sb_dirty(struct super_block *sb);
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134/* amigaffs.c */
135
136extern int affs_insert_hash(struct inode *inode, struct buffer_head *bh);
137extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
138extern int affs_remove_header(struct dentry *dentry);
139extern u32 affs_checksum_block(struct super_block *sb, struct buffer_head *bh);
140extern void affs_fix_checksum(struct super_block *sb, struct buffer_head *bh);
DengChaodb39c162015-11-12 21:40:41 +0800141extern void secs_to_datestamp(time64_t secs, struct affs_date *ds);
Al Viroa760b032011-07-26 03:04:30 -0400142extern umode_t prot_to_mode(u32 prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143extern void mode_to_prot(struct inode *inode);
Fabian Frederick1ee54b02014-12-12 16:57:49 -0800144__printf(3, 4)
Fabian Frederick8ca57722014-04-07 15:39:01 -0700145extern void affs_error(struct super_block *sb, const char *function,
146 const char *fmt, ...);
Fabian Frederick1ee54b02014-12-12 16:57:49 -0800147__printf(3, 4)
Fabian Frederick8ca57722014-04-07 15:39:01 -0700148extern void affs_warning(struct super_block *sb, const char *function,
149 const char *fmt, ...);
150extern bool affs_nofilenametruncate(const struct dentry *dentry);
151extern int affs_check_name(const unsigned char *name, int len,
152 bool notruncate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153extern int affs_copy_name(unsigned char *bstr, struct dentry *dentry);
154
155/* bitmap. c */
156
157extern u32 affs_count_free_blocks(struct super_block *s);
158extern void affs_free_block(struct super_block *sb, u32 block);
159extern u32 affs_alloc_block(struct inode *inode, u32 goal);
160extern int affs_init_bitmap(struct super_block *sb, int *flags);
161extern void affs_free_bitmap(struct super_block *sb);
162
163/* namei.c */
164
165extern int affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len);
Al Viro00cd8dd2012-06-10 17:13:09 -0400166extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167extern int affs_unlink(struct inode *dir, struct dentry *dentry);
Al Viroebfc3b42012-06-10 18:05:36 -0400168extern int affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool);
Al Viro18bb1db2011-07-26 01:41:39 -0400169extern int affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170extern int affs_rmdir(struct inode *dir, struct dentry *dentry);
171extern int affs_link(struct dentry *olddentry, struct inode *dir,
172 struct dentry *dentry);
173extern int affs_symlink(struct inode *dir, struct dentry *dentry,
174 const char *symname);
175extern int affs_rename(struct inode *old_dir, struct dentry *old_dentry,
Miklos Szeredif03b8ad2016-09-27 11:03:57 +0200176 struct inode *new_dir, struct dentry *new_dentry,
177 unsigned int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
179/* inode.c */
180
181extern unsigned long affs_parent_ino(struct inode *dir);
182extern struct inode *affs_new_inode(struct inode *dir);
183extern int affs_notify_change(struct dentry *dentry, struct iattr *attr);
Al Virof053ddd2010-06-06 10:16:41 -0400184extern void affs_evict_inode(struct inode *inode);
David Howells210f8552008-02-07 00:15:29 -0800185extern struct inode *affs_iget(struct super_block *sb,
186 unsigned long ino);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100187extern int affs_write_inode(struct inode *inode,
188 struct writeback_control *wbc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189extern int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type);
190
191/* file.c */
192
193void affs_free_prealloc(struct inode *inode);
194extern void affs_truncate(struct inode *);
Josef Bacik02c24a82011-07-16 20:44:56 -0400195int affs_file_fsync(struct file *, loff_t, loff_t, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
197/* dir.c */
198
199extern void affs_dir_truncate(struct inode *);
200
201/* jump tables */
202
Arjan van de Ven754661f2007-02-12 00:55:38 -0800203extern const struct inode_operations affs_file_inode_operations;
204extern const struct inode_operations affs_dir_inode_operations;
205extern const struct inode_operations affs_symlink_inode_operations;
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800206extern const struct file_operations affs_file_operations;
207extern const struct file_operations affs_file_operations_ofs;
208extern const struct file_operations affs_dir_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700209extern const struct address_space_operations affs_symlink_aops;
210extern const struct address_space_operations affs_aops;
211extern const struct address_space_operations affs_aops_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Al Viroe16404e2009-02-20 05:55:13 +0000213extern const struct dentry_operations affs_dentry_operations;
Al Viroa1298802011-01-12 16:45:19 -0500214extern const struct dentry_operations affs_intl_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216static inline void
217affs_set_blocksize(struct super_block *sb, int size)
218{
219 sb_set_blocksize(sb, size);
220}
221static inline struct buffer_head *
222affs_bread(struct super_block *sb, int block)
223{
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700224 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size)
226 return sb_bread(sb, block);
227 return NULL;
228}
229static inline struct buffer_head *
230affs_getblk(struct super_block *sb, int block)
231{
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 return sb_getblk(sb, block);
235 return NULL;
236}
237static inline struct buffer_head *
238affs_getzeroblk(struct super_block *sb, int block)
239{
240 struct buffer_head *bh;
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700241 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
243 bh = sb_getblk(sb, block);
244 lock_buffer(bh);
245 memset(bh->b_data, 0 , sb->s_blocksize);
246 set_buffer_uptodate(bh);
247 unlock_buffer(bh);
248 return bh;
249 }
250 return NULL;
251}
252static inline struct buffer_head *
253affs_getemptyblk(struct super_block *sb, int block)
254{
255 struct buffer_head *bh;
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700256 pr_debug("%s: %d\n", __func__, block);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
258 bh = sb_getblk(sb, block);
259 wait_on_buffer(bh);
260 set_buffer_uptodate(bh);
261 return bh;
262 }
263 return NULL;
264}
265static inline void
266affs_brelse(struct buffer_head *bh)
267{
268 if (bh)
Fabian Frederick9606d9a2014-06-06 14:37:25 -0700269 pr_debug("%s: %lld\n", __func__, (long long) bh->b_blocknr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 brelse(bh);
271}
272
273static inline void
274affs_adjust_checksum(struct buffer_head *bh, u32 val)
275{
276 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[5]);
277 ((__be32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
278}
279static inline void
280affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
281{
282 u32 tmp = be32_to_cpu(((__be32 *)bh->b_data)[0]);
283 ((__be32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
284}
285
286static inline void
287affs_lock_link(struct inode *inode)
288{
289 down(&AFFS_I(inode)->i_link_lock);
290}
291static inline void
292affs_unlock_link(struct inode *inode)
293{
294 up(&AFFS_I(inode)->i_link_lock);
295}
296static inline void
297affs_lock_dir(struct inode *inode)
298{
299 down(&AFFS_I(inode)->i_hash_lock);
300}
301static inline void
302affs_unlock_dir(struct inode *inode)
303{
304 up(&AFFS_I(inode)->i_hash_lock);
305}
306static inline void
307affs_lock_ext(struct inode *inode)
308{
309 down(&AFFS_I(inode)->i_ext_lock);
310}
311static inline void
312affs_unlock_ext(struct inode *inode)
313{
314 up(&AFFS_I(inode)->i_ext_lock);
315}