fs/fat/dir.c

42 				    struct buffer_head *bh,
45 	return ((loff_t)bh->b_blocknr << MSDOS_SB(sb)->dir_per_block_bits)
46 		| (de - (struct msdos_dir_entry *)bh->b_data);
54 	struct buffer_head *bh;
64 	bh = sb_find_get_block(sb, phys);
65 	if (bh == NULL || !buffer_uptodate(bh)) {
69 	brelse(bh);
72 /* Returns the inode number of the directory entry at offset pos. If bh is
74    returned in bh.
76    AV. OK, there we go: if both bh and de are non-NULL we assume that we just
80    AV. we make bh NULL.
83 			  struct buffer_head **bh, struct msdos_dir_entry **de)
91 	brelse(*bh);
92 	*bh = NULL;
100 	*bh = sb_bread(sb, phys);
101 	if (*bh == NULL) {
111 	*de = (struct msdos_dir_entry *)((*bh)->b_data + offset);
117 				struct buffer_head **bh,
121 	if (*bh && *de &&
122 	   (*de - (struct msdos_dir_entry *)(*bh)->b_data) <
128 	return fat__get_entry(dir, pos, bh, de);
275  * @bh: Pointer to the buffer head that may be used for reading directory
292 			  struct buffer_head **bh, struct msdos_dir_entry **de,
301 			brelse(*bh);
328 		if (fat_get_entry(dir, pos, bh, de) < 0)
480 	struct buffer_head *bh = NULL;
490 		if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
501 			int status = fat_parse_long(inode, &cpos, &bh, &de,
543 	sinfo->bh = bh;
544 	sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
571 	struct buffer_head *bh;
600 	bh = NULL;
602 	if (fat_get_entry(inode, &cpos, &bh, &de) == -1)
623 		int status = fat_parse_long(inode, &cpos, &bh, &de,
626 			bh = NULL;
682 		loff_t i_pos = fat_make_i_pos(sb, bh, de);
705 	brelse(bh);
882 			       struct buffer_head **bh,
885 	while (fat_get_entry(dir, pos, bh, de) >= 0) {
902 int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh,
908 	while (fat_get_short_entry(dir, &offset, bh, de) >= 0) {
919 	struct buffer_head *bh;
924 	bh = NULL;
926 	while (fat_get_short_entry(dir, &cpos, &bh, &de) >= 0) {
933 	brelse(bh);
944 	struct buffer_head *bh;
949 	bh = NULL;
951 	while (fat_get_short_entry(dir, &cpos, &bh, &de) >= 0) {
955 	brelse(bh);
969 	sinfo->bh = NULL;
970 	while (fat_get_short_entry(dir, &sinfo->slot_off, &sinfo->bh,
975 			sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
993 	sinfo->bh = NULL;
994 	while (fat_get_short_entry(dir, &sinfo->slot_off, &sinfo->bh,
999 			sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
1009 	struct buffer_head *bh;
1014 		bh = NULL;
1015 		if (fat_get_entry(dir, &pos, &bh, &de) < 0) {
1021 		endp = (struct msdos_dir_entry *)(bh->b_data + sb->s_blocksize);
1027 		mark_buffer_dirty_inode(bh, dir);
1029 			err = sync_dirty_buffer(bh);
1030 		brelse(bh);
1045 	struct buffer_head *bh;
1055 	bh = sinfo->bh;
1056 	sinfo->bh = NULL;
1057 	while (nr_slots && de >= (struct msdos_dir_entry *)bh->b_data) {
1062 	mark_buffer_dirty_inode(bh, dir);
1064 		err = sync_dirty_buffer(bh);
1065 	brelse(bh);
1212 			       struct buffer_head **bh, loff_t *i_pos)
1270 	*bh = bhs[n];
1271 	*de = (struct msdos_dir_entry *)((*bh)->b_data + offset);
1272 	*i_pos = fat_make_i_pos(sb, *bh, *de);
1282 	brelse(*bh);
1283 	*bh = NULL;
1298 	struct buffer_head *bh, *prev, *bhs[3]; /* 32*slots (672bytes) */
1307 	bh = prev = NULL;
1310 	while (fat_get_entry(dir, &pos, &bh, &de) > -1) {
1316 			if (prev != bh) {
1317 				get_bh(bh);
1318 				bhs[nr_bhs] = prev = bh;
1389 					      &de, &bh, &i_pos);
1409 	sinfo->bh = bh;
1410 	sinfo->i_pos = fat_make_i_pos(sb, sinfo->bh, sinfo->de);
1415 	brelse(bh);
1421 	brelse(bh);