fs/sysv/super.c

48 static void detected_xenix(struct sysv_sb_info *sbi, unsigned *max_links)
50 	struct buffer_head *bh1 = sbi->s_bh1;
51 	struct buffer_head *bh2 = sbi->s_bh2;
64 	sbi->s_fic_size = XENIX_NICINOD;
65 	sbi->s_flc_size = XENIX_NICFREE;
66 	sbi->s_sbd1 = (char *)sbd1;
67 	sbi->s_sbd2 = (char *)sbd2;
68 	sbi->s_sb_fic_count = &sbd1->s_ninode;
69 	sbi->s_sb_fic_inodes = &sbd1->s_inode[0];
70 	sbi->s_sb_total_free_inodes = &sbd2->s_tinode;
71 	sbi->s_bcache_count = &sbd1->s_nfree;
72 	sbi->s_bcache = &sbd1->s_free[0];
73 	sbi->s_free_blocks = &sbd2->s_tfree;
74 	sbi->s_sb_time = &sbd2->s_time;
75 	sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd1->s_isize);
76 	sbi->s_nzones = fs32_to_cpu(sbi, sbd1->s_fsize);
79 static void detected_sysv4(struct sysv_sb_info *sbi, unsigned *max_links)
82 	struct buffer_head *bh1 = sbi->s_bh1;
83 	struct buffer_head *bh2 = sbi->s_bh2;
91 	sbi->s_fic_size = SYSV_NICINOD;
92 	sbi->s_flc_size = SYSV_NICFREE;
93 	sbi->s_sbd1 = (char *)sbd;
94 	sbi->s_sbd2 = (char *)sbd;
95 	sbi->s_sb_fic_count = &sbd->s_ninode;
96 	sbi->s_sb_fic_inodes = &sbd->s_inode[0];
97 	sbi->s_sb_total_free_inodes = &sbd->s_tinode;
98 	sbi->s_bcache_count = &sbd->s_nfree;
99 	sbi->s_bcache = &sbd->s_free[0];
100 	sbi->s_free_blocks = &sbd->s_tfree;
101 	sbi->s_sb_time = &sbd->s_time;
102 	sbi->s_sb_state = &sbd->s_state;
103 	sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
104 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
107 static void detected_sysv2(struct sysv_sb_info *sbi, unsigned *max_links)
110 	struct buffer_head *bh1 = sbi->s_bh1;
111 	struct buffer_head *bh2 = sbi->s_bh2;
119 	sbi->s_fic_size = SYSV_NICINOD;
120 	sbi->s_flc_size = SYSV_NICFREE;
121 	sbi->s_sbd1 = (char *)sbd;
122 	sbi->s_sbd2 = (char *)sbd;
123 	sbi->s_sb_fic_count = &sbd->s_ninode;
124 	sbi->s_sb_fic_inodes = &sbd->s_inode[0];
125 	sbi->s_sb_total_free_inodes = &sbd->s_tinode;
126 	sbi->s_bcache_count = &sbd->s_nfree;
127 	sbi->s_bcache = &sbd->s_free[0];
128 	sbi->s_free_blocks = &sbd->s_tfree;
129 	sbi->s_sb_time = &sbd->s_time;
130 	sbi->s_sb_state = &sbd->s_state;
131 	sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
132 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
135 static void detected_coherent(struct sysv_sb_info *sbi, unsigned *max_links)
138 	struct buffer_head *bh1 = sbi->s_bh1;
143 	sbi->s_fic_size = COH_NICINOD;
144 	sbi->s_flc_size = COH_NICFREE;
145 	sbi->s_sbd1 = (char *)sbd;
146 	sbi->s_sbd2 = (char *)sbd;
147 	sbi->s_sb_fic_count = &sbd->s_ninode;
148 	sbi->s_sb_fic_inodes = &sbd->s_inode[0];
149 	sbi->s_sb_total_free_inodes = &sbd->s_tinode;
150 	sbi->s_bcache_count = &sbd->s_nfree;
151 	sbi->s_bcache = &sbd->s_free[0];
152 	sbi->s_free_blocks = &sbd->s_tfree;
153 	sbi->s_sb_time = &sbd->s_time;
154 	sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
155 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
158 static void detected_v7(struct sysv_sb_info *sbi, unsigned *max_links)
160 	struct buffer_head *bh2 = sbi->s_bh2;
164 	sbi->s_fic_size = V7_NICINOD;
165 	sbi->s_flc_size = V7_NICFREE;
166 	sbi->s_sbd1 = (char *)sbd;
167 	sbi->s_sbd2 = (char *)sbd;
168 	sbi->s_sb_fic_count = &sbd->s_ninode;
169 	sbi->s_sb_fic_inodes = &sbd->s_inode[0];
170 	sbi->s_sb_total_free_inodes = &sbd->s_tinode;
171 	sbi->s_bcache_count = &sbd->s_nfree;
172 	sbi->s_bcache = &sbd->s_free[0];
173 	sbi->s_free_blocks = &sbd->s_tfree;
174 	sbi->s_sb_time = &sbd->s_time;
175 	sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
176 	sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
179 static int detect_xenix(struct sysv_sb_info *sbi, struct buffer_head *bh)
183 		sbi->s_bytesex = BYTESEX_LE;
185 		sbi->s_bytesex = BYTESEX_BE;
188 	switch (fs32_to_cpu(sbi, sbd->s_type)) {
190 		sbi->s_type = FSTYPE_XENIX;
193 		sbi->s_type = FSTYPE_XENIX;
200 static int detect_sysv(struct sysv_sb_info *sbi, struct buffer_head *bh)
202 	struct super_block *sb = sbi->s_sb;
209 		sbi->s_bytesex = BYTESEX_LE;
211 		sbi->s_bytesex = BYTESEX_BE;
215 	type = fs32_to_cpu(sbi, sbd->s_type);
217  	if (fs16_to_cpu(sbi, sbd->s_nfree) == 0xffff) {
218  		sbi->s_type = FSTYPE_AFS;
219 		sbi->s_forced_ro = 1;
228 	if (fs32_to_cpu(sbi, sbd->s_time) < JAN_1_1980) {
232 		sbi->s_type = FSTYPE_SYSV2;
246 		sbi->s_forced_ro = 1;
249 	sbi->s_type = FSTYPE_SYSV4;
253 static int detect_coherent(struct sysv_sb_info *sbi, struct buffer_head *bh)
261 	sbi->s_bytesex = BYTESEX_PDP;
262 	sbi->s_type = FSTYPE_COH;
266 static int detect_sysv_odd(struct sysv_sb_info *sbi, struct buffer_head *bh)
268 	int size = detect_sysv(sbi, bh);
305 	struct sysv_sb_info *sbi = SYSV_SB(sb);
307 	char *found = flavour_names[sbi->s_type];
312 	sbi->s_firstinodezone = 2;
314 	flavour_setup[sbi->s_type](sbi, &sb->s_max_links);
315 	if (sbi->s_firstdatazone < sbi->s_firstinodezone)
318 	sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone;
319 	sbi->s_inodes_per_block = bsize >> 6;
320 	sbi->s_inodes_per_block_1 = (bsize >> 6)-1;
321 	sbi->s_inodes_per_block_bits = n_bits-6;
322 	sbi->s_ind_per_block = bsize_4;
323 	sbi->s_ind_per_block_2 = bsize_4*bsize_4;
324 	sbi->s_toobig_block = 10 + bsize_4 * (1 + bsize_4 * (1 + bsize_4));
325 	sbi->s_ind_per_block_bits = n_bits-2;
327 	sbi->s_ninodes = (sbi->s_firstdatazone - sbi->s_firstinodezone)
328 		<< sbi->s_inodes_per_block_bits;
334 	sb->s_magic = SYSV_MAGIC_BASE + sbi->s_type;
337 	if (sbi->s_forced_ro)
355 	struct sysv_sb_info *sbi;
365 	sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
366 	if (!sbi)
369 	sbi->s_sb = sb;
370 	sbi->s_block_base = 0;
371 	mutex_init(&sbi->s_lock);
372 	sb->s_fs_info = sbi;
410 		sbi->s_bh1 = bh1;
411 		sbi->s_bh2 = bh;
421 	kfree(sbi);
443 	struct sysv_sb_info *sbi;
445 	sbi = sb->s_fs_info;
449 	if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE ||
450 	    fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD ||
451 	    fs32_to_cpu(sbi, v7sb->s_fsize) > V7_MAXSIZE)
461 	if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR ||
462 	    (fs32_to_cpu(sbi, v7i->i_size) == 0) ||
463 	    (fs32_to_cpu(sbi, v7i->i_size) & 017) ||
464 	    (fs32_to_cpu(sbi, v7i->i_size) > V7_NFILES *
476 	struct sysv_sb_info *sbi;
482 	sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
483 	if (!sbi)
486 	sbi->s_sb = sb;
487 	sbi->s_block_base = 0;
488 	sbi->s_type = FSTYPE_V7;
489 	mutex_init(&sbi->s_lock);
490 	sb->s_fs_info = sbi;
504 	sbi->s_bytesex = BYTESEX_PDP;
509 	sbi->s_bytesex = BYTESEX_LE;
516 	sbi->s_bh1 = bh;
517 	sbi->s_bh2 = bh;
525 	kfree(sbi);