Lines Matching refs:fs
30 static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
40 blk_t blk_itr = fs->super->s_first_data_block;
43 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
45 if (!(fs->flags & EXT2_FLAG_RW))
48 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
54 block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
55 retval = ext2fs_get_mem(fs->blocksize, &block_buf);
58 memset(block_buf, 0xff, fs->blocksize);
62 ((EXT2_INODES_PER_GROUP(fs->super)+7) / 8);
63 retval = ext2fs_get_mem(fs->blocksize, &inode_buf);
66 memset(inode_buf, 0xff, fs->blocksize);
69 for (i = 0; i < fs->group_desc_count; i++) {
73 if (csum_flag && fs->group_desc[i].bg_flags &
77 retval = ext2fs_get_block_bitmap_range(fs->block_map,
82 if (i == fs->group_desc_count - 1) {
84 nbits = ((fs->super->s_blocks_count
85 - fs->super->s_first_data_block)
86 % EXT2_BLOCKS_PER_GROUP(fs->super));
88 for (j = nbits; j < fs->blocksize * 8; j++)
91 blk = fs->group_desc[i].bg_block_bitmap;
93 retval = io_channel_write_blk(fs->io, blk, 1,
105 if (csum_flag && fs->group_desc[i].bg_flags &
109 retval = ext2fs_get_inode_bitmap_range(fs->inode_map,
114 blk = fs->group_desc[i].bg_inode_bitmap;
116 retval = io_channel_write_blk(fs->io, blk, 1,
126 fs->flags &= ~EXT2_FLAG_BB_DIRTY;
130 fs->flags &= ~EXT2_FLAG_IB_DIRTY;
136 static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
142 int block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
143 int inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8;
145 int do_image = fs->flags & EXT2_FLAG_IMAGE_FILE;
148 blk_t blk_itr = fs->super->s_first_data_block;
153 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
155 fs->write_bitmaps = ext2fs_write_bitmaps;
157 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
161 retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
165 if (fs->block_map)
166 ext2fs_free_block_bitmap(fs->block_map);
168 strcat(buf, fs->device_name);
169 retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map);
172 retval = ext2fs_get_mem(do_image ? fs->blocksize :
179 if (fs->inode_map)
180 ext2fs_free_inode_bitmap(fs->inode_map);
182 strcat(buf, fs->device_name);
183 retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
186 retval = ext2fs_get_mem(do_image ? fs->blocksize :
194 if (fs->flags & EXT2_FLAG_IMAGE_FILE) {
195 blk = (fs->image_header->offset_inodemap / fs->blocksize);
196 ino_cnt = fs->super->s_inodes_count;
198 retval = io_channel_read_blk(fs->image_io, blk++,
202 cnt = fs->blocksize << 3;
205 retval = ext2fs_set_inode_bitmap_range(fs->inode_map,
209 ino_itr += fs->blocksize << 3;
210 ino_cnt -= fs->blocksize << 3;
211 inode_nbytes -= fs->blocksize;
213 blk = (fs->image_header->offset_blockmap /
214 fs->blocksize);
215 blk_cnt = EXT2_BLOCKS_PER_GROUP(fs->super) *
216 fs->group_desc_count;
218 retval = io_channel_read_blk(fs->image_io, blk++,
222 cnt = fs->blocksize << 3;
225 retval = ext2fs_set_block_bitmap_range(fs->block_map,
229 blk_itr += fs->blocksize << 3;
230 blk_cnt -= fs->blocksize << 3;
231 block_nbytes -= fs->blocksize;
236 for (i = 0; i < fs->group_desc_count; i++) {
238 blk = fs->group_desc[i].bg_block_bitmap;
239 if (csum_flag && fs->group_desc[i].bg_flags &
241 ext2fs_group_desc_csum_verify(fs, i))
244 retval = io_channel_read_blk(fs->io, blk,
253 retval = ext2fs_set_block_bitmap_range(fs->block_map,
260 blk = fs->group_desc[i].bg_inode_bitmap;
261 if (csum_flag && fs->group_desc[i].bg_flags &
263 ext2fs_group_desc_csum_verify(fs, i))
266 retval = io_channel_read_blk(fs->io, blk,
275 retval = ext2fs_set_inode_bitmap_range(fs->inode_map,
291 ext2fs_free_mem(&fs->block_map);
292 fs->block_map = 0;
295 ext2fs_free_mem(&fs->inode_map);
296 fs->inode_map = 0;
307 errcode_t ext2fs_read_inode_bitmap(ext2_filsys fs)
309 return read_bitmaps(fs, 1, 0);
312 errcode_t ext2fs_read_block_bitmap(ext2_filsys fs)
314 return read_bitmaps(fs, 0, 1);
317 errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs)
319 return write_bitmaps(fs, 1, 0);
322 errcode_t ext2fs_write_block_bitmap (ext2_filsys fs)
324 return write_bitmaps(fs, 0, 1);
327 errcode_t ext2fs_read_bitmaps(ext2_filsys fs)
329 if (fs->inode_map && fs->block_map)
332 return read_bitmaps(fs, !fs->inode_map, !fs->block_map);
335 errcode_t ext2fs_write_bitmaps(ext2_filsys fs)
337 int do_inode = fs->inode_map && ext2fs_test_ib_dirty(fs);
338 int do_block = fs->block_map && ext2fs_test_bb_dirty(fs);
343 return write_bitmaps(fs, do_inode, do_block);
