]> bbs.cooldavid.org Git - net-next-2.6.git/blame - fs/hpfs/hpfs_fn.h
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] sem2mutex: autofs4 wq_sem
[net-next-2.6.git] / fs / hpfs / hpfs_fn.h
CommitLineData
1da177e4
LT		 1/*
2 * linux/fs/hpfs/hpfs_fn.h
3 *
4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
5 *
6 * function headers
7 */
8
9//#define DBG
10//#define DEBUG_LOCKS
11
12#include <linux/pagemap.h>
13#include <linux/buffer_head.h>
14#include <linux/hpfs_fs.h>
15#include <linux/slab.h>
16#include <linux/smp_lock.h>
17
18#include "hpfs.h"
19
20#define EIOERROR EIO
21#define EFSERROR EPERM
22#define EMEMERROR ENOMEM
23
24#define ANODE_ALLOC_FWD 512
25#define FNODE_ALLOC_FWD 0
26#define ALLOC_FWD_MIN 16
27#define ALLOC_FWD_MAX 128
28#define ALLOC_M 1
29#define FNODE_RD_AHEAD 16
30#define ANODE_RD_AHEAD 16
31#define DNODE_RD_AHEAD 4
32
33#define FREE_DNODES_ADD 58
34#define FREE_DNODES_DEL 29
35
36#define CHKCOND(x,y) if (!(x)) printk y
37
38#ifdef DBG
39#define PRINTK(x) printk x
40#else
41#undef PRINTK
42#define PRINTK(x)
43#endif
44
45struct hpfs_inode_info {
46 loff_t mmu_private;
47 ino_t i_parent_dir; /* (directories) gives fnode of parent dir */
48 unsigned i_dno; /* (directories) root dnode */
49 unsigned i_dpos; /* (directories) temp for readdir */
50 unsigned i_dsubdno; /* (directories) temp for readdir */
51 unsigned i_file_sec; /* (files) minimalist cache of alloc info */
52 unsigned i_disk_sec; /* (files) minimalist cache of alloc info */
53 unsigned i_n_secs; /* (files) minimalist cache of alloc info */
54 unsigned i_ea_size; /* size of extended attributes */
55 unsigned i_conv : 2; /* (files) crlf->newline hackery */
56 unsigned i_ea_mode : 1; /* file's permission is stored in ea */
57 unsigned i_ea_uid : 1; /* file's uid is stored in ea */
58 unsigned i_ea_gid : 1; /* file's gid is stored in ea */
59 unsigned i_dirty : 1;
60 struct semaphore i_sem;
61 struct semaphore i_parent;
62 loff_t **i_rddir_off;
63 struct inode vfs_inode;
64};
65
66struct hpfs_sb_info {
67 ino_t sb_root; /* inode number of root dir */
68 unsigned sb_fs_size; /* file system size, sectors */
69 unsigned sb_bitmaps; /* sector number of bitmap list */
70 unsigned sb_dirband_start; /* directory band start sector */
71 unsigned sb_dirband_size; /* directory band size, dnodes */
72 unsigned sb_dmap; /* sector number of dnode bit map */
73 unsigned sb_n_free; /* free blocks for statfs, or -1 */
74 unsigned sb_n_free_dnodes; /* free dnodes for statfs, or -1 */
75 uid_t sb_uid; /* uid from mount options */
76 gid_t sb_gid; /* gid from mount options */
77 umode_t sb_mode; /* mode from mount options */
78 unsigned sb_conv : 2; /* crlf->newline hackery */
79 unsigned sb_eas : 2; /* eas: 0-ignore, 1-ro, 2-rw */
80 unsigned sb_err : 2; /* on errs: 0-cont, 1-ro, 2-panic */
81 unsigned sb_chk : 2; /* checks: 0-no, 1-normal, 2-strict */
82 unsigned sb_lowercase : 1; /* downcase filenames hackery */
83 unsigned sb_was_error : 1; /* there was an error, set dirty flag */
84 unsigned sb_chkdsk : 2; /* chkdsk: 0-no, 1-on errs, 2-allways */
85 unsigned char *sb_cp_table; /* code page tables: */
86 /* 128 bytes uppercasing table & */
87 /* 128 bytes lowercasing table */
88 unsigned *sb_bmp_dir; /* main bitmap directory */
89 unsigned sb_c_bitmap; /* current bitmap */
90 unsigned sb_max_fwd_alloc; /* max forwad allocation */
91 struct semaphore hpfs_creation_de; /* when creating dirents, nobody else
92 can alloc blocks */
93 /*unsigned sb_mounting : 1;*/
94 int sb_timeshift;
95};
96
97/*
98 * conv= options
99 */
100
101#define CONV_BINARY 0 /* no conversion */
102#define CONV_TEXT 1 /* crlf->newline */
103#define CONV_AUTO 2 /* decide based on file contents */
104
105/* Four 512-byte buffers and the 2k block obtained by concatenating them */
106
107struct quad_buffer_head {
108 struct buffer_head *bh[4];
109 void *data;
110};
111
112/* The b-tree down pointer from a dir entry */
113
114static inline dnode_secno de_down_pointer (struct hpfs_dirent *de)
115{
116 CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n"));
117 return *(dnode_secno *) ((void *) de + de->length - 4);
118}
119
120/* The first dir entry in a dnode */
121
122static inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode)
123{
124 return (void *) dnode->dirent;
125}
126
127/* The end+1 of the dir entries */
128
129static inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode)
130{
131 CHKCOND(dnode->first_free>=0x14 && dnode->first_free<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %d\n",(int)dnode->first_free));
132 return (void *) dnode + dnode->first_free;
133}
134
135/* The dir entry after dir entry de */
136
137static inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de)
138{
139 CHKCOND(de->length>=0x20 && de->length<0x800,("HPFS: de_next_de: de->length = %d\n",(int)de->length));
140 return (void *) de + de->length;
141}
142
143static inline struct extended_attribute *fnode_ea(struct fnode *fnode)
144{
145 return (struct extended_attribute *)((char *)fnode + fnode->ea_offs + fnode->acl_size_s);
146}
147
148static inline struct extended_attribute *fnode_end_ea(struct fnode *fnode)
149{
150 return (struct extended_attribute *)((char *)fnode + fnode->ea_offs + fnode->acl_size_s + fnode->ea_size_s);
151}
152
153static inline struct extended_attribute *next_ea(struct extended_attribute *ea)
154{
155 return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea->valuelen);
156}
157
158static inline secno ea_sec(struct extended_attribute *ea)
159{
160 return *(secno *)((char *)ea + 9 + ea->namelen);
161}
162
163static inline secno ea_len(struct extended_attribute *ea)
164{
165 return *(secno *)((char *)ea + 5 + ea->namelen);
166}
167
168static inline char *ea_data(struct extended_attribute *ea)
169{
170 return (char *)((char *)ea + 5 + ea->namelen);
171}
172
173static inline unsigned de_size(int namelen, secno down_ptr)
174{
175 return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0);
176}
177
178static inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src)
179{
180 int a;
181 int n;
182 if (!dst || !src) return;
183 a = dst->down;
184 n = dst->not_8x3;
185 memcpy((char *)dst + 2, (char *)src + 2, 28);
186 dst->down = a;
187 dst->not_8x3 = n;
188}
189
190static inline unsigned tstbits(unsigned *bmp, unsigned b, unsigned n)
191{
192 int i;
193 if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n;
194 if (!((bmp[(b & 0x3fff) >> 5] >> (b & 0x1f)) & 1)) return 1;
195 for (i = 1; i < n; i++)
196 if (/*b+i < 0x4000 &&*/ !((bmp[((b+i) & 0x3fff) >> 5] >> ((b+i) & 0x1f)) & 1))
197 return i + 1;
198 return 0;
199}
200
201/* alloc.c */
202
203int hpfs_chk_sectors(struct super_block *, secno, int, char *);
204secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int, int);
205int hpfs_alloc_if_possible(struct super_block *, secno);
206void hpfs_free_sectors(struct super_block *, secno, unsigned);
207int hpfs_check_free_dnodes(struct super_block *, int);
208void hpfs_free_dnode(struct super_block *, secno);
209struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *, int);
210struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **);
211struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **);
212
213/* anode.c */
214
215secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *);
216secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
217void hpfs_remove_btree(struct super_block *, struct bplus_header *);
218int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *);
219int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, char *);
220void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
221void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
222void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
223
224/* buffer.c */
225
226void hpfs_lock_creation(struct super_block *);
227void hpfs_unlock_creation(struct super_block *);
228void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
229void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
230void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
231void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *);
232void hpfs_brelse4(struct quad_buffer_head *);
233void hpfs_mark_4buffers_dirty(struct quad_buffer_head *);
234
235/* dentry.c */
236
237void hpfs_set_dentry_operations(struct dentry *);
238
239/* dir.c */
240
241struct dentry *hpfs_lookup(struct inode *, struct dentry *, struct nameidata *);
242extern struct file_operations hpfs_dir_ops;
243
244/* dnode.c */
245
246void hpfs_add_pos(struct inode *, loff_t *);
247void hpfs_del_pos(struct inode *, loff_t *);
248struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *, unsigned char *, unsigned, secno);
249int hpfs_add_dirent(struct inode *, unsigned char *, unsigned, struct hpfs_dirent *, int);
250int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
251void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
252dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
253struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *);
254struct hpfs_dirent *map_dirent(struct inode *, dnode_secno, char *, unsigned, dnode_secno *, struct quad_buffer_head *);
255void hpfs_remove_dtree(struct super_block *, dnode_secno);
256struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *);
257
258/* ea.c */
259
260void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
261int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int);
262char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *);
263void hpfs_set_ea(struct inode *, struct fnode *, char *, char *, int);
264
265/* file.c */
266
267int hpfs_file_fsync(struct file *, struct dentry *, int);
268extern struct file_operations hpfs_file_ops;
269extern struct inode_operations hpfs_file_iops;
270extern struct address_space_operations hpfs_aops;
271
272/* inode.c */
273
274void hpfs_init_inode(struct inode *);
275void hpfs_read_inode(struct inode *);
276void hpfs_write_inode(struct inode *);
277void hpfs_write_inode_nolock(struct inode *);
278int hpfs_notify_change(struct dentry *, struct iattr *);
279void hpfs_write_if_changed(struct inode *);
280void hpfs_delete_inode(struct inode *);
281
282/* map.c */
283
284unsigned *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
285unsigned *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
286char *hpfs_load_code_page(struct super_block *, secno);
287secno *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
288struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
289struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **);
290struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *);
291dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);
292
293/* name.c */
294
295unsigned char hpfs_upcase(unsigned char *, unsigned char);
296int hpfs_chk_name(unsigned char *, unsigned *);
297char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
298int hpfs_compare_names(struct super_block *, unsigned char *, unsigned, unsigned char *, unsigned, int);
299int hpfs_is_name_long(unsigned char *, unsigned);
300void hpfs_adjust_length(unsigned char *, unsigned *);
301void hpfs_decide_conv(struct inode *, unsigned char *, unsigned);
302
303/* namei.c */
304
305extern struct inode_operations hpfs_dir_iops;
306extern struct address_space_operations hpfs_symlink_aops;
307
308static inline struct hpfs_inode_info *hpfs_i(struct inode *inode)
309{
310 return list_entry(inode, struct hpfs_inode_info, vfs_inode);
311}
312
313static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb)
314{
315 return sb->s_fs_info;
316}
317
318/* super.c */
319
320void hpfs_error(struct super_block *, char *, ...);
321int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
322unsigned hpfs_count_one_bitmap(struct super_block *, secno);
323
324/*
325 * local time (HPFS) to GMT (Unix)
326 */
327
328static inline time_t local_to_gmt(struct super_block *s, time32_t t)
329{
330 extern struct timezone sys_tz;
331 return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
332}
333
334static inline time32_t gmt_to_local(struct super_block *s, time_t t)
335{
336 extern struct timezone sys_tz;
337 return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
338}
Clone of davem's net-next-2.6 tree