diff options
| -rw-r--r-- | drivers/block/drbd/drbd_debugfs.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_debugfs.c b/drivers/block/drbd/drbd_debugfs.c index 45b52056f88d..a4d0666a5931 100644 --- a/drivers/block/drbd/drbd_debugfs.c +++ b/drivers/block/drbd/drbd_debugfs.c @@ -11,7 +11,13 @@ #include "drbd_req.h" #include "drbd_debugfs.h" + +/********************************************************************** + * Whenever you change the file format, remember to bump the version. * + **********************************************************************/ + static struct dentry *drbd_debugfs_root; +static struct dentry *drbd_debugfs_version; static struct dentry *drbd_debugfs_resources; static struct dentry *drbd_debugfs_minors; @@ -368,6 +374,9 @@ static int in_flight_summary_show(struct seq_file *m, void *pos) if (!connection || !kref_get_unless_zero(&connection->kref)) return -ESTALE; + /* BUMP me if you change the file format/content/presentation */ + seq_printf(m, "v: %u\n\n", 0); + seq_puts(m, "oldest bitmap IO\n"); seq_print_resource_pending_bitmap_io(m, resource, jif); seq_putc(m, '\n'); @@ -562,6 +571,9 @@ static int callback_history_show(struct seq_file *m, void *ignored) struct drbd_connection *connection = m->private; unsigned long jif = jiffies; + /* BUMP me if you change the file format/content/presentation */ + seq_printf(m, "v: %u\n\n", 0); + seq_puts(m, "n\tage\tcallsite\tfn\n"); seq_print_timing_details(m, "worker", connection->w_cb_nr, connection->w_timing_details, jif); seq_print_timing_details(m, "receiver", connection->r_cb_nr, connection->r_timing_details, jif); @@ -686,6 +698,10 @@ static void resync_dump_detail(struct seq_file *m, struct lc_element *e) static int device_resync_extents_show(struct seq_file *m, void *ignored) { struct drbd_device *device = m->private; + + /* BUMP me if you change the file format/content/presentation */ + seq_printf(m, "v: %u\n\n", 0); + if (get_ldev_if_state(device, D_FAILED)) { lc_seq_printf_stats(m, device->resync); lc_seq_dump_details(m, device->resync, "rs_left flags", resync_dump_detail); @@ -697,6 +713,10 @@ static int device_resync_extents_show(struct seq_file *m, void *ignored) static int device_act_log_extents_show(struct seq_file *m, void *ignored) { struct drbd_device *device = m->private; + + /* BUMP me if you change the file format/content/presentation */ + seq_printf(m, "v: %u\n\n", 0); + if (get_ldev_if_state(device, D_FAILED)) { lc_seq_printf_stats(m, device->act_log); lc_seq_dump_details(m, device->act_log, "", NULL); @@ -713,6 +733,9 @@ static int device_oldest_requests_show(struct seq_file *m, void *ignored) struct drbd_request *r1, *r2; int i; + /* BUMP me if you change the file format/content/presentation */ + seq_printf(m, "v: %u\n\n", 0); + seq_puts(m, RQ_HDR); spin_lock_irq(&resource->req_lock); /* WRITE, then READ */ @@ -839,12 +862,36 @@ void drbd_debugfs_peer_device_cleanup(struct drbd_peer_device *peer_device) drbd_debugfs_remove(&peer_device->debugfs_peer_dev); } +static int drbd_version_show(struct seq_file *m, void *ignored) +{ + seq_printf(m, "# %s\n", drbd_buildtag()); + seq_printf(m, "VERSION=%s\n", REL_VERSION); + seq_printf(m, "API_VERSION=%u\n", API_VERSION); + seq_printf(m, "PRO_VERSION_MIN=%u\n", PRO_VERSION_MIN); + seq_printf(m, "PRO_VERSION_MAX=%u\n", PRO_VERSION_MAX); + return 0; +} + +static int drbd_version_open(struct inode *inode, struct file *file) +{ + return single_open(file, drbd_version_show, NULL); +} + +static struct file_operations drbd_version_fops = { + .owner = THIS_MODULE, + .open = drbd_version_open, + .llseek = seq_lseek, + .read = seq_read, + .release = single_release, +}; + /* not __exit, may be indirectly called * from the module-load-failure path as well. */ void drbd_debugfs_cleanup(void) { drbd_debugfs_remove(&drbd_debugfs_resources); drbd_debugfs_remove(&drbd_debugfs_minors); + drbd_debugfs_remove(&drbd_debugfs_version); drbd_debugfs_remove(&drbd_debugfs_root); } @@ -857,6 +904,11 @@ int __init drbd_debugfs_init(void) goto fail; drbd_debugfs_root = dentry; + dentry = debugfs_create_file("version", 0444, drbd_debugfs_root, NULL, &drbd_version_fops); + if (IS_ERR_OR_NULL(dentry)) + goto fail; + drbd_debugfs_version = dentry; + dentry = debugfs_create_dir("resources", drbd_debugfs_root); if (IS_ERR_OR_NULL(dentry)) goto fail; |