}
/*
+ * Replicate the first part of adjust_fs_info to determine what the
+ * new size of the file system should be. This allows resize2fs to
+ * exit early if we aren't going to make any changes to the file
+ * system.
+ */
+void adjust_new_size(ext2_filsys fs, blk64_t *sizep)
+{
+ blk64_t size, rem, overhead = 0;
+ unsigned long desc_blocks;
+ dgrp_t group_desc_count;
+ int has_bg;
+ unsigned long long new_inodes; /* u64 to check for overflow */
+
+ size = *sizep;
+retry:
+ group_desc_count = ext2fs_div64_ceil(size -
+ fs->super->s_first_data_block,
+ EXT2_BLOCKS_PER_GROUP(fs->super));
+ if (group_desc_count == 0)
+ return;
+ desc_blocks = ext2fs_div_ceil(group_desc_count,
+ EXT2_DESC_PER_BLOCK(fs->super));
+
+ /*
+ * Overhead is the number of bookkeeping blocks per group. It
+ * includes the superblock backup, the group descriptor
+ * backups, the inode bitmap, the block bitmap, and the inode
+ * table.
+ */
+ overhead = (int) (2 + fs->inode_blocks_per_group);
+
+ has_bg = 0;
+ if (ext2fs_has_feature_sparse_super2(fs->super)) {
+ /*
+ * We have to do this manually since
+ * super->s_backup_bgs hasn't been set up yet.
+ */
+ if (group_desc_count == 2)
+ has_bg = fs->super->s_backup_bgs[0] != 0;
+ else
+ has_bg = fs->super->s_backup_bgs[1] != 0;
+ } else
+ has_bg = ext2fs_bg_has_super(fs, group_desc_count - 1);
+ if (has_bg)
+ overhead += 1 + desc_blocks +
+ fs->super->s_reserved_gdt_blocks;
+
+ /*
+ * See if the last group is big enough to support the
+ * necessary data structures. If not, we need to get rid of
+ * it.
+ */
+ rem = (size - fs->super->s_first_data_block) %
+ fs->super->s_blocks_per_group;
+ if ((group_desc_count == 1) && rem && (rem < overhead))
+ return;
+ if ((group_desc_count > 1) && rem && (rem < overhead+50)) {
+ size -= rem;
+ goto retry;
+ }
+
+ /*
+ * If we need to reduce the size by no more than a block
+ * group to avoid overrunning the max inode limit, do it.
+ */
+ new_inodes =(unsigned long long) fs->super->s_inodes_per_group * group_desc_count;
+ if (new_inodes > ~0U) {
+ new_inodes = (unsigned long long) fs->super->s_inodes_per_group * (group_desc_count - 1);
+ if (new_inodes > ~0U)
+ return;
+ size = ((unsigned long long) fs->super->s_blocks_per_group *
+ (group_desc_count - 1)) + fs->super->s_first_data_block;
+
+ goto retry;
+ }
+ *sizep = size;
+}
+
+/*
* This routine adjusts the superblock and other data structures, both
* in disk as well as in memory...
*/
fs->inode_blocks_per_group,
&rfs->itable_buf);
if (retval)
- return retval;
+ goto errout;
}
retval = ext2fs_create_extent_table(&rfs->bmap, 0);
if (retval)
- return retval;
+ goto errout;
/*
* The first step is to figure out where all of the blocks
if (inode->i_flags & EXT4_EA_INODE_FL)
update_ea_inode_refs = 1;
else
- inode->i_ctime = time(0);
+ inode->i_ctime = rfs->old_fs->now ?
+ rfs->old_fs->now : time(0);
retval = ext2fs_write_inode_full(rfs->old_fs, new_inode,
inode, inode_size);
/* Update the directory mtime and ctime */
retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode);
if (retval == 0) {
- inode.i_mtime = inode.i_ctime = time(0);
+ inode.i_mtime = inode.i_ctime = is->rfs->old_fs->now ?
+ is->rfs->old_fs->now : time(0);
is->err = ext2fs_write_inode(is->rfs->old_fs, dir, &inode);
if (is->err)
return ret | DIRENT_ABORT;
*/
static errcode_t resize2fs_calculate_summary_stats(ext2_filsys fs)
{
- blk64_t blk;
+ errcode_t retval;
+ blk64_t blk = fs->super->s_first_data_block;
ext2_ino_t ino;
- unsigned int group = 0;
- unsigned int count = 0;
- blk64_t total_blocks_free = 0;
+ unsigned int n, group, count;
+ blk64_t total_clusters_free = 0;
int total_inodes_free = 0;
int group_free = 0;
int uninit = 0;
- blk64_t super_blk, old_desc_blk, new_desc_blk;
- int old_desc_blocks;
+ char *bitmap_buf;
/*
* First calculate the block statistics
*/
- uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT);
- ext2fs_super_and_bgd_loc2(fs, group, &super_blk, &old_desc_blk,
- &new_desc_blk, 0);
- if (ext2fs_has_feature_meta_bg(fs->super))
- old_desc_blocks = fs->super->s_first_meta_bg;
- else
- old_desc_blocks = fs->desc_blocks +
- fs->super->s_reserved_gdt_blocks;
- for (blk = B2C(fs->super->s_first_data_block);
- blk < ext2fs_blocks_count(fs->super);
- blk += EXT2FS_CLUSTER_RATIO(fs)) {
- if ((uninit &&
- !(EQ_CLSTR(blk, super_blk) ||
- ((old_desc_blk && old_desc_blocks &&
- GE_CLSTR(blk, old_desc_blk) &&
- LT_CLSTR(blk, old_desc_blk + old_desc_blocks))) ||
- ((new_desc_blk && EQ_CLSTR(blk, new_desc_blk))) ||
- EQ_CLSTR(blk, ext2fs_block_bitmap_loc(fs, group)) ||
- EQ_CLSTR(blk, ext2fs_inode_bitmap_loc(fs, group)) ||
- ((GE_CLSTR(blk, ext2fs_inode_table_loc(fs, group)) &&
- LT_CLSTR(blk, ext2fs_inode_table_loc(fs, group)
- + fs->inode_blocks_per_group))))) ||
- (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk))) {
- group_free++;
- total_blocks_free++;
- }
- count++;
- if ((count == fs->super->s_clusters_per_group) ||
- EQ_CLSTR(blk, ext2fs_blocks_count(fs->super)-1)) {
- ext2fs_bg_free_blocks_count_set(fs, group, group_free);
- ext2fs_group_desc_csum_set(fs, group);
- group++;
- if (group >= fs->group_desc_count)
- break;
- count = 0;
- group_free = 0;
- uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT);
- ext2fs_super_and_bgd_loc2(fs, group, &super_blk,
- &old_desc_blk,
- &new_desc_blk, 0);
- if (ext2fs_has_feature_meta_bg(fs->super))
- old_desc_blocks = fs->super->s_first_meta_bg;
- else
- old_desc_blocks = fs->desc_blocks +
- fs->super->s_reserved_gdt_blocks;
+ bitmap_buf = malloc(fs->blocksize);
+ if (!bitmap_buf)
+ return ENOMEM;
+ for (group = 0; group < fs->group_desc_count;
+ group++) {
+ retval = ext2fs_get_block_bitmap_range2(fs->block_map,
+ B2C(blk), fs->super->s_clusters_per_group, bitmap_buf);
+ if (retval) {
+ free(bitmap_buf);
+ return retval;
}
+ n = ext2fs_bitcount(bitmap_buf,
+ fs->super->s_clusters_per_group / 8);
+ group_free = fs->super->s_clusters_per_group - n;
+ total_clusters_free += group_free;
+ ext2fs_bg_free_blocks_count_set(fs, group, group_free);
+ ext2fs_group_desc_csum_set(fs, group);
+ blk += fs->super->s_blocks_per_group;
}
- total_blocks_free = C2B(total_blocks_free);
- ext2fs_free_blocks_count_set(fs->super, total_blocks_free);
+ free(bitmap_buf);
+ ext2fs_free_blocks_count_set(fs->super, C2B(total_clusters_free));
/*
* Next, calculate the inode statistics
blk64_t grp, data_needed, last_start;
blk64_t overhead = 0;
int old_desc_blocks;
- int flexbg_size = 1 << fs->super->s_log_groups_per_flex;
+ unsigned flexbg_size = 1U << fs->super->s_log_groups_per_flex;
/*
* first figure out how many group descriptors we need to
/* calculate how many blocks are needed for data */
data_needed = ext2fs_blocks_count(fs->super);
for (grp = 0; grp < fs->group_desc_count; grp++) {
- data_needed -= calc_group_overhead(fs, grp, old_desc_blocks);
- data_needed -= ext2fs_bg_free_blocks_count(fs, grp);
+ __u32 n = ext2fs_bg_free_blocks_count(fs, grp);
+
+ if (n > EXT2_BLOCKS_PER_GROUP(fs->super))
+ n = EXT2_BLOCKS_PER_GROUP(fs->super);
+ n += calc_group_overhead(fs, grp, old_desc_blocks);
+ if (data_needed < n) {
+ if (flags & RESIZE_DEBUG_MIN_CALC)
+ printf("file system appears inconsistent?!?\n");
+ return ext2fs_blocks_count(fs->super);
+ }
+ data_needed -= n;
}
#ifdef RESIZE2FS_DEBUG
if (flags & RESIZE_DEBUG_MIN_CALC)
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff