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Subject[PATCH 23/24] ceph: debugfs
Date
Basic state information is available via /sys/kernel/debug/ceph,
including instances of the client, current monitor, mds and osd
maps, and outstanding service requests.

Signed-off-by: Sage Weil <sage@newdream.net>
---
fs/ceph/debugfs.c | 450 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 450 insertions(+), 0 deletions(-)
create mode 100644 fs/ceph/debugfs.c
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
new file mode 100644
index 0000000..b90fc3e
--- /dev/null
+++ b/fs/ceph/debugfs.c
@@ -0,0 +1,450 @@
+#include "ceph_debug.h"
+
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include "super.h"
+#include "mds_client.h"
+#include "mon_client.h"
+#include "auth.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+/*
+ * Implement /sys/kernel/debug/ceph fun
+ *
+ * /sys/kernel/debug/ceph/client* - an instance of the ceph client
+ * .../osdmap - current osdmap
+ * .../mdsmap - current mdsmap
+ * .../monmap - current monmap
+ * .../osdc - active osd requests
+ * .../mdsc - active mds requests
+ * .../monc - mon client state
+ * .../dentry_lru - dump contents of dentry lru
+ * .../caps - expose cap (reservation) stats
+ */
+
+static struct dentry *ceph_debugfs_dir;
+
+static int monmap_show(struct seq_file *s, void *p)
+{
+ int i;
+ struct ceph_client *client = s->private;
+
+ if (client->monc.monmap == NULL)
+ return 0;
+
+ seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
+ for (i = 0; i < client->monc.monmap->num_mon; i++) {
+ struct ceph_entity_inst *inst =
+ &client->monc.monmap->mon_inst[i];
+
+ seq_printf(s, "\t%s%lld\t%s\n",
+ ENTITY_NAME(inst->name),
+ pr_addr(&inst->addr.in_addr));
+ }
+ return 0;
+}
+
+static int mdsmap_show(struct seq_file *s, void *p)
+{
+ int i;
+ struct ceph_client *client = s->private;
+
+ if (client->mdsc.mdsmap == NULL)
+ return 0;
+ seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
+ seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
+ seq_printf(s, "session_timeout %d\n",
+ client->mdsc.mdsmap->m_session_timeout);
+ seq_printf(s, "session_autoclose %d\n",
+ client->mdsc.mdsmap->m_session_autoclose);
+ for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
+ struct ceph_entity_addr *addr =
+ &client->mdsc.mdsmap->m_info[i].addr;
+ int state = client->mdsc.mdsmap->m_info[i].state;
+
+ seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
+ ceph_mds_state_name(state));
+ }
+ return 0;
+}
+
+static int osdmap_show(struct seq_file *s, void *p)
+{
+ int i;
+ struct ceph_client *client = s->private;
+
+ if (client->osdc.osdmap == NULL)
+ return 0;
+ seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
+ seq_printf(s, "flags%s%s\n",
+ (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
+ " NEARFULL" : "",
+ (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
+ " FULL" : "");
+ for (i = 0; i < client->osdc.osdmap->num_pools; i++) {
+ struct ceph_pg_pool_info *pool =
+ &client->osdc.osdmap->pg_pool[i];
+ seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
+ i, pool->v.pg_num, pool->pg_num_mask,
+ pool->v.lpg_num, pool->lpg_num_mask);
+ }
+ for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
+ struct ceph_entity_addr *addr =
+ &client->osdc.osdmap->osd_addr[i];
+ int state = client->osdc.osdmap->osd_state[i];
+ char sb[64];
+
+ seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
+ i, pr_addr(&addr->in_addr),
+ ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
+ ceph_osdmap_state_str(sb, sizeof(sb), state));
+ }
+ return 0;
+}
+
+static int monc_show(struct seq_file *s, void *p)
+{
+ struct ceph_client *client = s->private;
+ struct ceph_mon_statfs_request *req;
+ u64 nexttid = 0;
+ int got;
+ struct ceph_mon_client *monc = &client->monc;
+
+ mutex_lock(&monc->mutex);
+
+ if (monc->have_mdsmap)
+ seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
+ if (monc->have_osdmap)
+ seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
+ if (monc->want_next_osdmap)
+ seq_printf(s, "want next osdmap\n");
+
+ while (nexttid < monc->last_tid) {
+ got = radix_tree_gang_lookup(&monc->statfs_request_tree,
+ (void **)&req, nexttid, 1);
+ if (got == 0)
+ break;
+ nexttid = req->tid + 1;
+
+ seq_printf(s, "%lld statfs\n", req->tid);
+ }
+ mutex_unlock(&monc->mutex);
+
+ return 0;
+}
+
+static int mdsc_show(struct seq_file *s, void *p)
+{
+ struct ceph_client *client = s->private;
+ struct ceph_mds_request *req;
+ u64 nexttid = 0;
+ int got;
+ struct ceph_mds_client *mdsc = &client->mdsc;
+ int pathlen;
+ u64 pathbase;
+ char *path;
+
+ mutex_lock(&mdsc->mutex);
+ while (nexttid < mdsc->last_tid) {
+ got = radix_tree_gang_lookup(&mdsc->request_tree,
+ (void **)&req, nexttid, 1);
+ if (got == 0)
+ break;
+ nexttid = req->r_tid + 1;
+
+ if (req->r_request)
+ seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
+ else
+ seq_printf(s, "%lld\t(no request)\t", req->r_tid);
+
+ seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
+
+ if (req->r_got_unsafe)
+ seq_printf(s, "\t(unsafe)");
+ else
+ seq_printf(s, "\t");
+
+ if (req->r_inode) {
+ seq_printf(s, " #%llx", ceph_ino(req->r_inode));
+ } else if (req->r_dentry) {
+ path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
+ &pathbase, 0);
+ spin_lock(&req->r_dentry->d_lock);
+ seq_printf(s, " #%llx/%.*s (%s)",
+ ceph_ino(req->r_dentry->d_parent->d_inode),
+ req->r_dentry->d_name.len,
+ req->r_dentry->d_name.name,
+ path ? path : "");
+ spin_unlock(&req->r_dentry->d_lock);
+ kfree(path);
+ } else if (req->r_path1) {
+ seq_printf(s, " #%llx/%s", req->r_ino1.ino,
+ req->r_path1);
+ }
+
+ if (req->r_old_dentry) {
+ path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
+ &pathbase, 0);
+ spin_lock(&req->r_old_dentry->d_lock);
+ seq_printf(s, " #%llx/%.*s (%s)",
+ ceph_ino(req->r_old_dentry->d_parent->d_inode),
+ req->r_old_dentry->d_name.len,
+ req->r_old_dentry->d_name.name,
+ path ? path : "");
+ spin_unlock(&req->r_old_dentry->d_lock);
+ kfree(path);
+ } else if (req->r_path2) {
+ if (req->r_ino2.ino)
+ seq_printf(s, " #%llx/%s", req->r_ino2.ino,
+ req->r_path2);
+ else
+ seq_printf(s, " %s", req->r_path2);
+ }
+
+ seq_printf(s, "\n");
+ }
+ mutex_unlock(&mdsc->mutex);
+
+ return 0;
+}
+
+static int osdc_show(struct seq_file *s, void *pp)
+{
+ struct ceph_client *client = s->private;
+ struct ceph_osd_client *osdc = &client->osdc;
+ struct rb_node *p;
+
+ mutex_lock(&osdc->request_mutex);
+ for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
+ struct ceph_osd_request *req;
+ struct ceph_osd_request_head *head;
+ struct ceph_osd_op *op;
+ int num_ops;
+ int opcode, olen;
+ int i;
+
+ req = rb_entry(p, struct ceph_osd_request, r_node);
+
+ seq_printf(s, "%lld\tosd%d\t", req->r_tid,
+ req->r_osd ? req->r_osd->o_osd : -1);
+
+ head = req->r_request->front.iov_base;
+ op = (void *)(head + 1);
+
+ num_ops = le16_to_cpu(head->num_ops);
+ olen = le32_to_cpu(head->object_len);
+ seq_printf(s, "%.*s", olen,
+ (const char *)(head->ops + num_ops));
+
+ if (req->r_reassert_version.epoch)
+ seq_printf(s, "\t%u'%llu",
+ (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
+ le64_to_cpu(req->r_reassert_version.version));
+ else
+ seq_printf(s, "\t");
+
+ for (i = 0; i < num_ops; i++) {
+ opcode = le16_to_cpu(op->op);
+ seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
+ op++;
+ }
+
+ seq_printf(s, "\n");
+ }
+ mutex_unlock(&osdc->request_mutex);
+ return 0;
+}
+
+static int caps_show(struct seq_file *s, void *p)
+{
+ struct ceph_client *client = p;
+ int total, avail, used, reserved;
+
+ ceph_reservation_status(client, &total, &avail, &used, &reserved);
+ seq_printf(s, "total\t\t%d\n"
+ "avail\t\t%d\n"
+ "used\t\t%d\n"
+ "reserved\t%d\n",
+ total, avail, used, reserved);
+ return 0;
+}
+
+static int dentry_lru_show(struct seq_file *s, void *ptr)
+{
+ struct ceph_client *client = s->private;
+ struct ceph_mds_client *mdsc = &client->mdsc;
+ struct ceph_dentry_info *di;
+
+ spin_lock(&mdsc->dentry_lru_lock);
+ list_for_each_entry(di, &mdsc->dentry_lru, lru) {
+ struct dentry *dentry = di->dentry;
+ seq_printf(s, "%p %p\t%.*s\n",
+ di, dentry, dentry->d_name.len, dentry->d_name.name);
+ }
+ spin_unlock(&mdsc->dentry_lru_lock);
+
+ return 0;
+}
+
+#define DEFINE_SHOW_FUNC(name) \
+static int name##_open(struct inode *inode, struct file *file) \
+{ \
+ struct seq_file *sf; \
+ int ret; \
+ \
+ ret = single_open(file, name, NULL); \
+ sf = file->private_data; \
+ sf->private = inode->i_private; \
+ return ret; \
+} \
+ \
+static const struct file_operations name##_fops = { \
+ .open = name##_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+};
+
+DEFINE_SHOW_FUNC(monmap_show)
+DEFINE_SHOW_FUNC(mdsmap_show)
+DEFINE_SHOW_FUNC(osdmap_show)
+DEFINE_SHOW_FUNC(monc_show)
+DEFINE_SHOW_FUNC(mdsc_show)
+DEFINE_SHOW_FUNC(osdc_show)
+DEFINE_SHOW_FUNC(dentry_lru_show)
+DEFINE_SHOW_FUNC(caps_show)
+
+int __init ceph_debugfs_init(void)
+{
+ ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
+ if (!ceph_debugfs_dir)
+ return -ENOMEM;
+ return 0;
+}
+
+void ceph_debugfs_cleanup(void)
+{
+ debugfs_remove(ceph_debugfs_dir);
+}
+
+int ceph_debugfs_client_init(struct ceph_client *client)
+{
+ int ret = 0;
+ char name[80];
+
+ snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
+ PR_FSID(&client->fsid), client->monc.auth->global_id);
+
+ client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
+ if (!client->debugfs_dir)
+ goto out;
+
+ client->monc.debugfs_file = debugfs_create_file("monc",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &monc_show_fops);
+ if (!client->monc.debugfs_file)
+ goto out;
+
+ client->mdsc.debugfs_file = debugfs_create_file("mdsc",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &mdsc_show_fops);
+ if (!client->mdsc.debugfs_file)
+ goto out;
+
+ client->osdc.debugfs_file = debugfs_create_file("osdc",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &osdc_show_fops);
+ if (!client->osdc.debugfs_file)
+ goto out;
+
+ client->debugfs_monmap = debugfs_create_file("monmap",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &monmap_show_fops);
+ if (!client->debugfs_monmap)
+ goto out;
+
+ client->debugfs_mdsmap = debugfs_create_file("mdsmap",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &mdsmap_show_fops);
+ if (!client->debugfs_mdsmap)
+ goto out;
+
+ client->debugfs_osdmap = debugfs_create_file("osdmap",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &osdmap_show_fops);
+ if (!client->debugfs_osdmap)
+ goto out;
+
+ client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
+ 0600,
+ client->debugfs_dir,
+ client,
+ &dentry_lru_show_fops);
+ if (!client->debugfs_dentry_lru)
+ goto out;
+
+ client->debugfs_caps = debugfs_create_file("caps",
+ 0400,
+ client->debugfs_dir,
+ client,
+ &caps_show_fops);
+ if (!client->debugfs_caps)
+ goto out;
+
+ return 0;
+
+out:
+ ceph_debugfs_client_cleanup(client);
+ return ret;
+}
+
+void ceph_debugfs_client_cleanup(struct ceph_client *client)
+{
+ debugfs_remove(client->debugfs_caps);
+ debugfs_remove(client->debugfs_dentry_lru);
+ debugfs_remove(client->debugfs_osdmap);
+ debugfs_remove(client->debugfs_mdsmap);
+ debugfs_remove(client->debugfs_monmap);
+ debugfs_remove(client->osdc.debugfs_file);
+ debugfs_remove(client->mdsc.debugfs_file);
+ debugfs_remove(client->monc.debugfs_file);
+ debugfs_remove(client->debugfs_dir);
+}
+
+#else // CONFIG_DEBUG_FS
+
+int __init ceph_debugfs_init(void)
+{
+ return 0;
+}
+
+void ceph_debugfs_cleanup(void)
+{
+}
+
+int ceph_debugfs_client_init(struct ceph_client *client)
+{
+ return 0;
+}
+
+void ceph_debugfs_client_cleanup(struct ceph_client *client)
+{
+}
+
+#endif // CONFIG_DEBUG_FS
--
1.6.5


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