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ceph: debugfs
Basic state information is available via /sys/kernel/debug/ceph, including instances of the client, fsids, current monitor, mds and osd maps, outstanding server requests, and hooks to adjust debug levels. Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil
parent
8f4e91dee2
commit
76aa844d5b
425
fs/ceph/debugfs.c
Normal file
425
fs/ceph/debugfs.c
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@ -0,0 +1,425 @@
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#include "ceph_debug.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 "super.h"
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#include "mds_client.h"
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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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* .../mdsmap - current mdsmap
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* .../monmap - current monmap
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* .../osdc - active osd requests
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* .../mdsc - active mds 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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*/
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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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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 mdsmap_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->mdsc.mdsmap == NULL)
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return 0;
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seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
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seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
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seq_printf(s, "session_timeout %d\n",
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client->mdsc.mdsmap->m_session_timeout);
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seq_printf(s, "session_autoclose %d\n",
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client->mdsc.mdsmap->m_session_autoclose);
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for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
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struct ceph_entity_addr *addr =
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&client->mdsc.mdsmap->m_info[i].addr;
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int state = client->mdsc.mdsmap->m_info[i].state;
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seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
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ceph_mds_state_name(state));
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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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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 (i = 0; i < client->osdc.osdmap->num_pools; i++) {
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struct ceph_pg_pool_info *pool =
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&client->osdc.osdmap->pg_pool[i];
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seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
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i, 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, 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_statfs_request *req;
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u64 nexttid = 0;
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int got;
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struct ceph_mon_client *monc = &client->monc;
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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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while (nexttid < monc->last_tid) {
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got = radix_tree_gang_lookup(&monc->statfs_request_tree,
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(void **)&req, nexttid, 1);
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if (got == 0)
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break;
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nexttid = req->tid + 1;
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seq_printf(s, "%lld statfs\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 mdsc_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_mds_request *req;
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u64 nexttid = 0;
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int got;
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struct ceph_mds_client *mdsc = &client->mdsc;
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int pathlen;
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u64 pathbase;
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char *path;
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mutex_lock(&mdsc->mutex);
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while (nexttid < mdsc->last_tid) {
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got = radix_tree_gang_lookup(&mdsc->request_tree,
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(void **)&req, nexttid, 1);
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if (got == 0)
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break;
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nexttid = req->r_tid + 1;
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if (req->r_request)
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seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
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else
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seq_printf(s, "%lld\t(no request)\t", req->r_tid);
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seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
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if (req->r_got_unsafe)
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seq_printf(s, "\t(unsafe)");
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else
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seq_printf(s, "\t");
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if (req->r_inode) {
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seq_printf(s, " #%llx", ceph_ino(req->r_inode));
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} else if (req->r_dentry) {
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path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
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&pathbase, 0);
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spin_lock(&req->r_dentry->d_lock);
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seq_printf(s, " #%llx/%.*s (%s)",
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ceph_ino(req->r_dentry->d_parent->d_inode),
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req->r_dentry->d_name.len,
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req->r_dentry->d_name.name,
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path ? path : "");
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spin_unlock(&req->r_dentry->d_lock);
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kfree(path);
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} else if (req->r_path1) {
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seq_printf(s, " #%llx/%s", req->r_ino1.ino,
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req->r_path1);
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}
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if (req->r_old_dentry) {
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path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
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&pathbase, 0);
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spin_lock(&req->r_old_dentry->d_lock);
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seq_printf(s, " #%llx/%.*s (%s)",
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ceph_ino(req->r_old_dentry->d_parent->d_inode),
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req->r_old_dentry->d_name.len,
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req->r_old_dentry->d_name.name,
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path ? path : "");
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spin_unlock(&req->r_old_dentry->d_lock);
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kfree(path);
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} else if (req->r_path2) {
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if (req->r_ino2.ino)
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seq_printf(s, " #%llx/%s", req->r_ino2.ino,
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req->r_path2);
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else
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seq_printf(s, " %s", req->r_path2);
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}
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seq_printf(s, "\n");
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}
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mutex_unlock(&mdsc->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", req->r_tid,
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req->r_osd ? req->r_osd->o_osd : -1);
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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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static int caps_show(struct seq_file *s, void *p)
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{
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struct ceph_client *client = p;
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int total, avail, used, reserved;
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ceph_reservation_status(client, &total, &avail, &used, &reserved);
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seq_printf(s, "total\t\t%d\n"
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"avail\t\t%d\n"
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"used\t\t%d\n"
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"reserved\t%d\n",
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total, avail, used, reserved);
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return 0;
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}
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static int dentry_lru_show(struct seq_file *s, void *ptr)
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{
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struct ceph_client *client = s->private;
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struct ceph_mds_client *mdsc = &client->mdsc;
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struct ceph_dentry_info *di;
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spin_lock(&mdsc->dentry_lru_lock);
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list_for_each_entry(di, &mdsc->dentry_lru, lru) {
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struct dentry *dentry = di->dentry;
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seq_printf(s, "%p %p\t%.*s\n",
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di, dentry, dentry->d_name.len, dentry->d_name.name);
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}
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spin_unlock(&mdsc->dentry_lru_lock);
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return 0;
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}
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#define DEFINE_SHOW_FUNC(name) \
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static int name##_open(struct inode *inode, struct file *file) \
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{ \
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struct seq_file *sf; \
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int ret; \
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\
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ret = single_open(file, name, NULL); \
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sf = file->private_data; \
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sf->private = inode->i_private; \
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return ret; \
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} \
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\
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static const struct file_operations name##_fops = { \
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.open = name##_open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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};
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DEFINE_SHOW_FUNC(monmap_show)
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DEFINE_SHOW_FUNC(mdsmap_show)
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DEFINE_SHOW_FUNC(osdmap_show)
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DEFINE_SHOW_FUNC(monc_show)
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DEFINE_SHOW_FUNC(mdsc_show)
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DEFINE_SHOW_FUNC(osdc_show)
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DEFINE_SHOW_FUNC(dentry_lru_show)
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DEFINE_SHOW_FUNC(caps_show)
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int __init 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 = 0;
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char name[80];
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snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
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PR_FSID(&client->monc.monmap->fsid), client->whoami);
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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->mdsc.debugfs_file = debugfs_create_file("mdsc",
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0600,
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client->debugfs_dir,
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client,
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&mdsc_show_fops);
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if (!client->mdsc.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_mdsmap = debugfs_create_file("mdsmap",
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0600,
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client->debugfs_dir,
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client,
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&mdsmap_show_fops);
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if (!client->debugfs_mdsmap)
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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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client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
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0600,
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client->debugfs_dir,
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client,
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&dentry_lru_show_fops);
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if (!client->debugfs_dentry_lru)
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goto out;
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client->debugfs_caps = debugfs_create_file("caps",
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0400,
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client->debugfs_dir,
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client,
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&caps_show_fops);
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if (!client->debugfs_caps)
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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_caps);
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debugfs_remove(client->debugfs_dentry_lru);
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debugfs_remove(client->debugfs_osdmap);
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debugfs_remove(client->debugfs_mdsmap);
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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->mdsc.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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