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![Yehuda Sadeh](/assets/img/avatar_default.png)
The rados block device (rbd), based on osdblk, creates a block device that is backed by objects stored in the Ceph distributed object storage cluster. Each device consists of a single metadata object and data striped over many data objects. The rbd driver supports read-only snapshots. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
267 lines
6.5 KiB
C
267 lines
6.5 KiB
C
#include <linux/ceph/ceph_debug.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/ceph/libceph.h>
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#include <linux/ceph/mon_client.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/debugfs.h>
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#ifdef CONFIG_DEBUG_FS
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/*
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* Implement /sys/kernel/debug/ceph fun
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*
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* /sys/kernel/debug/ceph/client* - an instance of the ceph client
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* .../osdmap - current osdmap
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* .../monmap - current monmap
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* .../osdc - active osd requests
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* .../monc - mon client state
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* .../dentry_lru - dump contents of dentry lru
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* .../caps - expose cap (reservation) stats
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* .../bdi - symlink to ../../bdi/something
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*/
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static struct dentry *ceph_debugfs_dir;
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static int monmap_show(struct seq_file *s, void *p)
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{
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int i;
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struct ceph_client *client = s->private;
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if (client->monc.monmap == NULL)
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return 0;
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seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
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for (i = 0; i < client->monc.monmap->num_mon; i++) {
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struct ceph_entity_inst *inst =
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&client->monc.monmap->mon_inst[i];
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seq_printf(s, "\t%s%lld\t%s\n",
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ENTITY_NAME(inst->name),
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ceph_pr_addr(&inst->addr.in_addr));
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}
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return 0;
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}
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static int osdmap_show(struct seq_file *s, void *p)
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{
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int i;
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struct ceph_client *client = s->private;
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struct rb_node *n;
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if (client->osdc.osdmap == NULL)
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return 0;
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seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
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seq_printf(s, "flags%s%s\n",
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(client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
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" NEARFULL" : "",
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(client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
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" FULL" : "");
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for (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {
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struct ceph_pg_pool_info *pool =
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rb_entry(n, struct ceph_pg_pool_info, node);
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seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
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pool->id, pool->v.pg_num, pool->pg_num_mask,
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pool->v.lpg_num, pool->lpg_num_mask);
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}
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for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
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struct ceph_entity_addr *addr =
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&client->osdc.osdmap->osd_addr[i];
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int state = client->osdc.osdmap->osd_state[i];
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char sb[64];
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seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
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i, ceph_pr_addr(&addr->in_addr),
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((client->osdc.osdmap->osd_weight[i]*100) >> 16),
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ceph_osdmap_state_str(sb, sizeof(sb), state));
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}
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return 0;
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}
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static int monc_show(struct seq_file *s, void *p)
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{
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struct ceph_client *client = s->private;
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struct ceph_mon_generic_request *req;
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struct ceph_mon_client *monc = &client->monc;
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struct rb_node *rp;
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mutex_lock(&monc->mutex);
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if (monc->have_mdsmap)
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seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
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if (monc->have_osdmap)
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seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
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if (monc->want_next_osdmap)
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seq_printf(s, "want next osdmap\n");
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for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
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__u16 op;
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req = rb_entry(rp, struct ceph_mon_generic_request, node);
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op = le16_to_cpu(req->request->hdr.type);
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if (op == CEPH_MSG_STATFS)
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seq_printf(s, "%lld statfs\n", req->tid);
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else
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seq_printf(s, "%lld unknown\n", req->tid);
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}
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mutex_unlock(&monc->mutex);
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return 0;
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}
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static int osdc_show(struct seq_file *s, void *pp)
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{
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struct ceph_client *client = s->private;
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struct ceph_osd_client *osdc = &client->osdc;
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struct rb_node *p;
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mutex_lock(&osdc->request_mutex);
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for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
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struct ceph_osd_request *req;
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struct ceph_osd_request_head *head;
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struct ceph_osd_op *op;
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int num_ops;
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int opcode, olen;
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int i;
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req = rb_entry(p, struct ceph_osd_request, r_node);
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seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
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req->r_osd ? req->r_osd->o_osd : -1,
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le32_to_cpu(req->r_pgid.pool),
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le16_to_cpu(req->r_pgid.ps));
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head = req->r_request->front.iov_base;
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op = (void *)(head + 1);
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num_ops = le16_to_cpu(head->num_ops);
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olen = le32_to_cpu(head->object_len);
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seq_printf(s, "%.*s", olen,
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(const char *)(head->ops + num_ops));
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if (req->r_reassert_version.epoch)
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seq_printf(s, "\t%u'%llu",
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(unsigned)le32_to_cpu(req->r_reassert_version.epoch),
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le64_to_cpu(req->r_reassert_version.version));
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else
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seq_printf(s, "\t");
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for (i = 0; i < num_ops; i++) {
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opcode = le16_to_cpu(op->op);
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seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
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op++;
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}
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seq_printf(s, "\n");
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}
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mutex_unlock(&osdc->request_mutex);
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return 0;
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}
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CEPH_DEFINE_SHOW_FUNC(monmap_show)
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CEPH_DEFINE_SHOW_FUNC(osdmap_show)
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CEPH_DEFINE_SHOW_FUNC(monc_show)
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CEPH_DEFINE_SHOW_FUNC(osdc_show)
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int ceph_debugfs_init(void)
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{
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ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
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if (!ceph_debugfs_dir)
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return -ENOMEM;
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return 0;
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}
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void ceph_debugfs_cleanup(void)
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{
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debugfs_remove(ceph_debugfs_dir);
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}
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int ceph_debugfs_client_init(struct ceph_client *client)
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{
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int ret = -ENOMEM;
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char name[80];
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snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
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client->monc.auth->global_id);
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client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
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if (!client->debugfs_dir)
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goto out;
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client->monc.debugfs_file = debugfs_create_file("monc",
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0600,
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client->debugfs_dir,
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client,
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&monc_show_fops);
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if (!client->monc.debugfs_file)
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goto out;
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client->osdc.debugfs_file = debugfs_create_file("osdc",
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0600,
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client->debugfs_dir,
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client,
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&osdc_show_fops);
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if (!client->osdc.debugfs_file)
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goto out;
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client->debugfs_monmap = debugfs_create_file("monmap",
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0600,
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client->debugfs_dir,
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client,
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&monmap_show_fops);
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if (!client->debugfs_monmap)
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goto out;
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client->debugfs_osdmap = debugfs_create_file("osdmap",
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0600,
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client->debugfs_dir,
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client,
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&osdmap_show_fops);
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if (!client->debugfs_osdmap)
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goto out;
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return 0;
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out:
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ceph_debugfs_client_cleanup(client);
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return ret;
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}
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void ceph_debugfs_client_cleanup(struct ceph_client *client)
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{
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debugfs_remove(client->debugfs_osdmap);
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debugfs_remove(client->debugfs_monmap);
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debugfs_remove(client->osdc.debugfs_file);
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debugfs_remove(client->monc.debugfs_file);
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debugfs_remove(client->debugfs_dir);
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}
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#else /* CONFIG_DEBUG_FS */
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int ceph_debugfs_init(void)
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{
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return 0;
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}
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void ceph_debugfs_cleanup(void)
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{
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}
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int ceph_debugfs_client_init(struct ceph_client *client)
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{
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return 0;
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}
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void ceph_debugfs_client_cleanup(struct ceph_client *client)
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{
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}
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#endif /* CONFIG_DEBUG_FS */
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EXPORT_SYMBOL(ceph_debugfs_init);
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EXPORT_SYMBOL(ceph_debugfs_cleanup);
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