diff options
| -rw-r--r-- | fs/ext3/resize.c | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c index a4693c0..771f7ad 100644 --- a/fs/ext3/resize.c +++ b/fs/ext3/resize.c @@ -154,6 +154,34 @@ static void mark_bitmap_end(int start_bit, int end_bit, char *bitmap) } /* + * If we have fewer than thresh credits, extend by EXT3_MAX_TRANS_DATA. + * If that fails, restart the transaction & regain write access for the + * buffer head which is used for block_bitmap modifications. + */ +static int extend_or_restart_transaction(handle_t *handle, int thresh, + struct buffer_head *bh) +{ + int err; + + if (handle->h_buffer_credits >= thresh) + return 0; + + err = ext3_journal_extend(handle, EXT3_MAX_TRANS_DATA); + if (err < 0) + return err; + if (err) { + err = ext3_journal_restart(handle, EXT3_MAX_TRANS_DATA); + if (err) + return err; + err = ext3_journal_get_write_access(handle, bh); + if (err) + return err; + } + + return 0; +} + +/* * Set up the block and inode bitmaps, and the inode table for the new group. * This doesn't need to be part of the main transaction, since we are only * changing blocks outside the actual filesystem. We still do journaling to @@ -175,8 +203,9 @@ static int setup_new_group_blocks(struct super_block *sb, int i; int err = 0, err2; - handle = ext3_journal_start_sb(sb, reserved_gdb + gdblocks + - 2 + sbi->s_itb_per_group); + /* This transaction may be extended/restarted along the way */ + handle = ext3_journal_start_sb(sb, EXT3_MAX_TRANS_DATA); + if (IS_ERR(handle)) return PTR_ERR(handle); @@ -203,6 +232,10 @@ static int setup_new_group_blocks(struct super_block *sb, ext3_debug("update backup group %#04lx (+%d)\n", block, bit); + err = extend_or_restart_transaction(handle, 1, bh); + if (err) + goto exit_bh; + gdb = sb_getblk(sb, block); if (!gdb) { err = -EIO; @@ -228,6 +261,10 @@ static int setup_new_group_blocks(struct super_block *sb, ext3_debug("clear reserved block %#04lx (+%d)\n", block, bit); + err = extend_or_restart_transaction(handle, 1, bh); + if (err) + goto exit_bh; + if (IS_ERR(gdb = bclean(handle, sb, block))) { err = PTR_ERR(bh); goto exit_bh; @@ -249,6 +286,11 @@ static int setup_new_group_blocks(struct super_block *sb, struct buffer_head *it; ext3_debug("clear inode block %#04lx (+%d)\n", block, bit); + + err = extend_or_restart_transaction(handle, 1, bh); + if (err) + goto exit_bh; + if (IS_ERR(it = bclean(handle, sb, block))) { err = PTR_ERR(it); goto exit_bh; @@ -257,6 +299,11 @@ static int setup_new_group_blocks(struct super_block *sb, brelse(it); ext3_set_bit(bit, bh->b_data); } + + err = extend_or_restart_transaction(handle, 2, bh); + if (err) + goto exit_bh; + mark_bitmap_end(input->blocks_count, EXT3_BLOCKS_PER_GROUP(sb), bh->b_data); ext3_journal_dirty_metadata(handle, bh); |
