/[public]/fat-epoc/trunk/fat-epoc-2.6.15.diff
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Annotation of /fat-epoc/trunk/fat-epoc-2.6.15.diff

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Revision 298 - (hide annotations)
Fri Aug 10 23:15:27 2007 UTC (17 years, 3 months ago) by frodo
File size: 5964 byte(s)
(Frodo)
  Added a new patch for 2.6.15 kernels
  Added debian support for this
  Updated copyrights

1 frodo 298 diff -up -r linux-2.6.15.orig/fs/fat/dir.c linux-2.6.15/fs/fat/dir.c
2     --- linux-2.6.15.orig/fs/fat/dir.c 2007-08-11 00:52:40.000000000 +0200
3     +++ linux-2.6.15/fs/fat/dir.c 2007-08-11 00:48:35.000000000 +0200
4     @@ -240,6 +240,7 @@ static int fat_parse_long(struct inode *
5     {
6     struct msdos_dir_slot *ds;
7     unsigned char id, slot, slots, alias_checksum;
8     + int epoc = MSDOS_SB(dir->i_sb)->options.epoc;
9    
10     if (!*unicode) {
11     *unicode = (wchar_t *)__get_free_page(GFP_KERNEL);
12     @@ -286,6 +287,8 @@ parse_long:
13     }
14     if ((*de)->name[0] == DELETED_FLAG)
15     return PARSE_INVALID;
16     + if (epoc && ((*de)->name[0] == EOD_FLAG))
17     + return PARSE_EOF;
18     if ((*de)->attr == ATTR_EXT)
19     goto parse_long;
20     if (IS_FREE((*de)->name) || ((*de)->attr & ATTR_VOLUME))
21     @@ -319,6 +322,7 @@ int fat_search_long(struct inode *inode,
22     unsigned short opt_shortname = sbi->options.shortname;
23     loff_t cpos = 0;
24     int chl, i, j, last_u, err;
25     + int epoc = sbi->options.epoc;
26    
27     err = -ENOENT;
28     while(1) {
29     @@ -328,6 +332,9 @@ parse_record:
30     nr_slots = 0;
31     if (de->name[0] == DELETED_FLAG)
32     continue;
33     + if (epoc && (de->name[0] == EOD_FLAG))
34     + goto EODir;
35     +
36     if (de->attr != ATTR_EXT && (de->attr & ATTR_VOLUME))
37     continue;
38     if (de->attr != ATTR_EXT && IS_FREE(de->name))
39     @@ -455,6 +462,8 @@ static int __fat_readdir(struct inode *i
40     int chi, chl, i, i2, j, last, last_u, dotoffset = 0;
41     loff_t cpos;
42     int ret = 0;
43     + int epoc = MSDOS_SB(sb)->options.epoc;
44     +
45    
46     lock_kernel();
47    
48     @@ -485,6 +494,8 @@ GetNew:
49     parse_record:
50     long_slots = 0;
51     /* Check for long filename entry */
52     + if (epoc && (de->name[0] == EOD_FLAG))
53     + goto EODir;
54     if (isvfat) {
55     if (de->name[0] == DELETED_FLAG)
56     goto RecEnd;
57     @@ -752,7 +763,10 @@ static int fat_get_short_entry(struct in
58     struct buffer_head **bh,
59     struct msdos_dir_entry **de)
60     {
61     + int epoc = MSDOS_SB(dir->i_sb)->options.epoc;
62     while (fat_get_entry(dir, pos, bh, de) >= 0) {
63     + if (epoc && ((*de)->name[0] == EOD_FLAG))
64     + return -ENOENT;
65     /* free entry or long name entry or volume label */
66     if (!IS_FREE((*de)->name) && !((*de)->attr & ATTR_VOLUME))
67     return 0;
68     @@ -1130,6 +1144,25 @@ error:
69     return err;
70     }
71    
72     +int fat_write_zero_entry(struct inode *dir, loff_t curr)
73     +{
74     + struct msdos_dir_entry *de = NULL;
75     + struct buffer_head *bh = NULL;
76     + loff_t pos;
77     + int err = 0;
78     +
79     + pos = curr;
80     + if (fat_get_entry(dir,&pos,&bh,&de) < 0)
81     + return 0;
82     +
83     + de->name[0] = EOD_FLAG;
84     + mark_buffer_dirty(bh);
85     + if (IS_DIRSYNC(dir))
86     + err = sync_dirty_buffer(bh);
87     + brelse(bh);
88     + return err;
89     +}
90     +
91     int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
92     struct fat_slot_info *sinfo)
93     {
94     @@ -1139,6 +1172,8 @@ int fat_add_entries(struct inode *dir, v
95     struct msdos_dir_entry *de;
96     int err, free_slots, i, nr_bhs;
97     loff_t pos, i_pos;
98     + int epoc = sbi->options.epoc;
99     + int last_entry = 0;
100    
101     sinfo->nr_slots = nr_slots;
102    
103     @@ -1152,7 +1187,9 @@ int fat_add_entries(struct inode *dir, v
104     if (pos >= FAT_MAX_DIR_SIZE)
105     goto error;
106    
107     - if (IS_FREE(de->name)) {
108     + if (epoc && (de->name[0] == EOD_FLAG))
109     + last_entry = 1;
110     + if (last_entry || IS_FREE(de->name)) {
111     if (prev != bh) {
112     get_bh(bh);
113     bhs[nr_bhs] = prev = bh;
114     @@ -1182,6 +1219,17 @@ found:
115     err = 0;
116     pos -= free_slots * sizeof(*de);
117     nr_slots -= free_slots;
118     +
119     + /* We need to write an end-of-directory slot. And we do it first,
120     + * because we want to keep the directory in a readble state.
121     + * Note that there is no need to remove it on error, as it is beyond
122     + * the visible end of directory anyway.
123     + */
124     + if (epoc && !nr_slots && last_entry)
125     + err = fat_write_zero_entry(dir, pos + free_slots * sizeof(*de));
126     + if (err)
127     + goto error;
128     +
129     if (free_slots) {
130     /*
131     * Second stage: filling the free entries with new entries.
132     diff -up -r linux-2.6.15.orig/fs/fat/inode.c linux-2.6.15/fs/fat/inode.c
133     --- linux-2.6.15.orig/fs/fat/inode.c 2007-08-11 00:52:40.000000000 +0200
134     +++ linux-2.6.15/fs/fat/inode.c 2007-08-11 00:49:24.000000000 +0200
135     @@ -775,6 +775,7 @@ enum {
136     Opt_charset, Opt_shortname_lower, Opt_shortname_win95,
137     Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
138     Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
139     + Opt_epoc,
140     Opt_obsolate, Opt_err,
141     };
142    
143     @@ -796,6 +797,7 @@ static match_table_t fat_tokens = {
144     {Opt_showexec, "showexec"},
145     {Opt_debug, "debug"},
146     {Opt_immutable, "sys_immutable"},
147     + {Opt_epoc, "epoc"},
148     {Opt_obsolate, "conv=binary"},
149     {Opt_obsolate, "conv=text"},
150     {Opt_obsolate, "conv=auto"},
151     @@ -948,6 +950,10 @@ static int parse_options(char *options,
152     return 0;
153     opts->codepage = option;
154     break;
155     + case Opt_epoc:
156     + opts->epoc = 1;
157     + break;
158     +
159    
160     /* msdos specific */
161     case Opt_dots:
162     diff -up -r linux-2.6.15.orig/include/linux/msdos_fs.h linux-2.6.15/include/linux/msdos_fs.h
163     --- linux-2.6.15.orig/include/linux/msdos_fs.h 2007-08-11 00:52:45.000000000 +0200
164     +++ linux-2.6.15/include/linux/msdos_fs.h 2007-08-11 00:49:24.000000000 +0200
165     @@ -44,6 +44,7 @@
166     #define CASE_LOWER_EXT 16 /* extension is lower case */
167    
168     #define DELETED_FLAG 0xe5 /* marks file as deleted when in name[0] */
169     +#define EOD_FLAG 0x00 /* marks end of directory when in name[0] for old fats */
170     #define IS_FREE(n) (!*(n) || *(n) == DELETED_FLAG)
171    
172     /* valid file mode bits */
173     @@ -203,7 +204,9 @@ struct fat_mount_options {
174     unicode_xlate:1, /* create escape sequences for unhandled Unicode */
175     numtail:1, /* Does first alias have a numeric '~1' type tail? */
176     atari:1, /* Use Atari GEMDOS variation of MS-DOS fs */
177     - nocase:1; /* Does this need case conversion? 0=need case conversion*/
178     + nocase:1, /* Does this need case conversion? 0=need case conversion*/
179     + epoc:1; /* Filename starting with 0x00 marks end of dir? */
180     +
181     };
182    
183     #define FAT_HASH_BITS 8

frodo@frodo.looijaard.name
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