23 /* Disk format stuff - taken from Linux drivers/md/dm-log-writes.c */
61      * The mutable state of the driver, consisting of the current log sector
62      * and the number of log entries.
93             .name = "log-append",
95             .help = "Append to an existing log",
98             .name = "log-sector-size",
100             .help = "Log sector size",
103             .name = "log-super-update-interval",
105             .help = "Log superblock update interval (# of write requests)",
125 static uint64_t blk_log_writes_find_cur_log_sector(BdrvChild *log,  in blk_log_writes_find_cur_log_sector()  argument
136         int read_ret = bdrv_pread(log, cur_sector << sector_bits,  in blk_log_writes_find_cur_log_sector()
140                              "Failed to read log entry %"PRIu64, cur_idx);  in blk_log_writes_find_cur_log_sector()
145             error_setg(errp, "Invalid flags 0x%"PRIx64" in log entry %"PRIu64,  in blk_log_writes_find_cur_log_sector()
189     /* Open the log file */  in blk_log_writes_open()
190     s->log_file = bdrv_open_child(NULL, options, "log", bs, &child_of_bds,  in blk_log_writes_open()
200     log_append = qemu_opt_get_bool(opts, "log-append", false);  in blk_log_writes_open()
205         if (qemu_opt_find(opts, "log-sector-size")) {  in blk_log_writes_open()
207             error_setg(errp, "log-append and log-sector-size are mutually "  in blk_log_writes_open()
212         /* Read log superblock or fake one for an empty log */  in blk_log_writes_open()
221                 error_setg_errno(errp, -ret, "Could not read log superblock");  in blk_log_writes_open()
228             error_setg(errp, "Invalid log superblock magic");  in blk_log_writes_open()
234             error_setg(errp, "Unsupported log version %"PRIu64,  in blk_log_writes_open()
256         log_sector_size = qemu_opt_get_size(opts, "log-sector-size",  in blk_log_writes_open()
266         error_setg(errp, "Invalid log sector size %"PRIu64, log_sector_size);  in blk_log_writes_open()
272     s->update_interval = qemu_opt_get_number(opts, "log-super-update-interval",  in blk_log_writes_open()
276         error_setg(errp, "Invalid log superblock update interval %"PRIu64,  in blk_log_writes_open()
373      * log entry may have to be written in two parts, and the state of the  in blk_log_writes_co_do_log()
391      * Write the log entry. Note that if this is a "write zeroes" operation,  in blk_log_writes_co_do_log()
588     "log-append",
589     "log-sector-size",