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ext4: fix online resize bug
There is a bug when we are trying to verify that the reserve inode's double indirect blocks point back to the primary gdt blocks. The fix is obvious, we need to mod the gdb count by the addr's per block. This was verified using the same testcase as with the ext3 equivalent of this patch. Signed-off-by: Josef Bacik <jbacik@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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1 changed files with 2 additions and 1 deletions
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@ -563,7 +563,8 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
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}
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blk = EXT4_SB(sb)->s_sbh->b_blocknr + 1 + EXT4_SB(sb)->s_gdb_count;
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blk = EXT4_SB(sb)->s_sbh->b_blocknr + 1 + EXT4_SB(sb)->s_gdb_count;
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data = (__le32 *)dind->b_data + EXT4_SB(sb)->s_gdb_count;
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data = (__le32 *)dind->b_data + (EXT4_SB(sb)->s_gdb_count %
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EXT4_ADDR_PER_BLOCK(sb));
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end = (__le32 *)dind->b_data + EXT4_ADDR_PER_BLOCK(sb);
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end = (__le32 *)dind->b_data + EXT4_ADDR_PER_BLOCK(sb);
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/* Get each reserved primary GDT block and verify it holds backups */
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/* Get each reserved primary GDT block and verify it holds backups */
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