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scan: improve io error checking and reporting

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This commit is contained in:
David Teigland 2018-04-06 13:12:26 -05:00
parent 6d05859862
commit 45e5e702c1
1 changed files with 19 additions and 11 deletions
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30
lib/label/label.c
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@ -466,17 +466,20 @@ static int _scan_list(struct dm_list *devs, int *failed)
struct dm_list done_devs;
struct device_list *devl, *devl2;
struct block *bb;
int scan_open_errors = 0;
int scan_read_errors = 0;
int scan_process_errors = 0;
int scan_failed_count = 0;
int scan_lvm_count = 0;
int rem_prefetches;
int scan_failed;
int is_lvm_device;
int error;
int ret;
dm_list_init(&wait_devs);
dm_list_init(&done_devs);
log_debug_devs("Scanning %d devices.", dm_list_size(devs));
log_debug_devs("Scanning %d devices for VG info", dm_list_size(devs));
scan_more:
rem_prefetches = bcache_max_prefetches(scan_bcache);
@ -498,6 +501,7 @@ static int _scan_list(struct dm_list *devs, int *failed)
log_debug_devs("Scan failed to open %s.", dev_name(devl->dev));
dm_list_del(&devl->list);
dm_list_add(&done_devs, &devl->list);
scan_open_errors++;
scan_failed_count++;
continue;
}
@ -513,11 +517,15 @@ static int _scan_list(struct dm_list *devs, int *failed)
dm_list_iterate_items_safe(devl, devl2, &wait_devs) {
bb = NULL;
error = 0;
scan_failed = 0;
is_lvm_device = 0;
if (!bcache_get(scan_bcache, devl->dev->bcache_fd, 0, 0, &bb)) {
log_debug_devs("Scan failed to read %s.", dev_name(devl->dev));
scan_failed_count++;
if (!bcache_get(scan_bcache, devl->dev->bcache_fd, 0, 0, &bb, &error)) {
log_debug_devs("Scan failed to read %s error %d.", dev_name(devl->dev), error);
scan_failed = 1;
scan_read_errors++;
scan_failed_count++;
lvmcache_del_dev(devl->dev);
} else {
log_debug_devs("Processing data from device %s fd %d block %p", dev_name(devl->dev), devl->dev->bcache_fd, bb);
@ -526,12 +534,10 @@ static int _scan_list(struct dm_list *devs, int *failed)
if (!ret && is_lvm_device) {
log_debug_devs("Scan failed to process %s", dev_name(devl->dev));
scan_failed_count++;
scan_failed = 1;
scan_process_errors++;
scan_failed_count++;
lvmcache_del_dev(devl->dev);
} else {
scan_lvm_count++;
scan_failed = 0;
}
}
@ -556,8 +562,8 @@ static int _scan_list(struct dm_list *devs, int *failed)
if (!dm_list_empty(devs))
goto scan_more;
log_debug_devs("Scanned devices: %d lvm, %d failed.",
scan_lvm_count, scan_failed_count);
log_debug_devs("Scanned devices: open errors %d read errors %d process errors %d",
scan_open_errors, scan_read_errors, scan_process_errors);
if (failed)
*failed = scan_failed_count;
@ -649,6 +655,8 @@ int label_scan(struct cmd_context *cmd)
};
dev_iter_destroy(iter);
log_debug_devs("Found %d devices to scan", dm_list_size(&all_devs));
if (!scan_bcache) {
/*
* FIXME: there should probably be some max number of