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    Subject[PATCH 19/20] ceph: debugfs
    Date
    Basic state information is available via /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>
    ---
    fs/ceph/debugfs.c | 604 +++++++++++++++++++++++++++++++++++++++++++++++++++++
    1 files changed, 604 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..bf399e7
    --- /dev/null
    +++ b/fs/ceph/debugfs.c
    @@ -0,0 +1,604 @@
    +#include <linux/module.h>
    +#include <linux/ctype.h>
    +#include <linux/debugfs.h>
    +#include <linux/seq_file.h>
    +
    +#include "super.h"
    +#include "mds_client.h"
    +
    +static struct dentry *ceph_debugfs_dir;
    +static struct dentry *ceph_debugfs_debug;
    +static struct dentry *ceph_debugfs_debug_msgr;
    +static struct dentry *ceph_debugfs_debug_console;
    +static struct dentry *ceph_debugfs_debug_mask;
    +static struct dentry *ceph_debugfs_caps_reservation;
    +
    +/*
    + * ceph_debug_mask
    + */
    +struct _debug_mask_name {
    + int mask;
    + char *name;
    +};
    +
    +static struct _debug_mask_name _debug_mask_names[] = {
    + {DOUT_MASK_ADDR, "addr"},
    + {DOUT_MASK_CAPS, "caps"},
    + {DOUT_MASK_DIR, "dir"},
    + {DOUT_MASK_EXPORT, "export"},
    + {DOUT_MASK_FILE, "file"},
    + {DOUT_MASK_INODE, "inode"},
    + {DOUT_MASK_IOCTL, "ioctl"},
    + {DOUT_MASK_MDSC, "mdsc"},
    + {DOUT_MASK_MDSMAP, "mdsmap"},
    + {DOUT_MASK_MSGR, "msgr"},
    + {DOUT_MASK_MON, "mon"},
    + {DOUT_MASK_OSDC, "osdc"},
    + {DOUT_MASK_OSDMAP, "osdmap"},
    + {DOUT_MASK_SNAP, "snap"},
    + {DOUT_MASK_SUPER, "super"},
    + {DOUT_MASK_PROTOCOL, "protocol"},
    + {DOUT_MASK_PROC, "proc"},
    + {DOUT_MASK_TOOLS, "tools"},
    + {0, NULL}
    +};
    +
    +static int debug_mask_show(struct seq_file *s, void *p)
    +{
    + int i = 0;
    + seq_printf(s, "0x%x", ceph_debug_mask);
    +
    + while (_debug_mask_names[i].mask) {
    + if (ceph_debug_mask & _debug_mask_names[i].mask)
    + seq_printf(s, " %s",
    + _debug_mask_names[i].name);
    + i++;
    + }
    + seq_printf(s, "\n");
    + return 0;
    +}
    +
    +static int get_debug_mask(const char *name, int len)
    +{
    + int i = 0;
    +
    + while (_debug_mask_names[i].name) {
    + if (strncmp(_debug_mask_names[i].name, name, len) == 0)
    + return _debug_mask_names[i].mask;
    + i++;
    + }
    + return 0;
    +}
    +
    +static ssize_t debug_mask_store(struct file *file, const char __user *buffer,
    + size_t count, loff_t *data)
    +{
    + char *next, *tok;
    + char *buf;
    +
    + if (count > PAGE_SIZE)
    + return -EINVAL;
    +
    + buf = kmalloc(count + 1, GFP_KERNEL);
    +
    + if (copy_from_user(buf, buffer, count))
    + return -EFAULT;
    +
    + buf[count] = '\0';
    +
    + next = buf;
    +
    + while (1) {
    + tok = next;
    + next = strpbrk(tok, " \t\r\n");
    + if (!next)
    + break;
    + if (isdigit(*tok)) {
    + ceph_debug_mask = simple_strtol(tok, NULL, 0);
    + } else {
    + int remove = 0;
    + int mask;
    +
    + if (*tok == '-') {
    + remove = 1;
    + tok++;
    + } else if (*tok == '+')
    + tok++;
    + mask = get_debug_mask(tok, next-tok);
    + if (mask) {
    + if (remove)
    + ceph_debug_mask &= ~mask;
    + else
    + ceph_debug_mask |= mask;
    + }
    + }
    + next++;
    + }
    +
    + kfree(buf);
    +
    + return count;
    +}
    +
    +static int debug_mask_open(struct inode *inode, struct file *file)
    +{
    + return single_open(file, debug_mask_show, NULL);
    +}
    +
    +static const struct file_operations ceph_debug_mask_fops = {
    + .open = debug_mask_open,
    + .read = seq_read,
    + .write = debug_mask_store,
    + .llseek = seq_lseek,
    + .release = single_release,
    +};
    +
    +static int fsid_show(struct seq_file *s, void *p)
    +{
    + struct ceph_client *client = s->private;
    +
    + seq_printf(s, "%llx.%llx\n",
    + le64_to_cpu(__ceph_fsid_major(&client->monc.monmap->fsid)),
    + le64_to_cpu(__ceph_fsid_minor(&client->monc.monmap->fsid)));
    + return 0;
    +}
    +
    +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%d\t%u.%u.%u.%u:%u\n",
    + ENTITY_NAME(inst->name),
    + IPQUADPORT(inst->addr.ipaddr));
    + }
    + 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_addr[i];
    + int state = client->mdsc.mdsmap->m_state[i];
    +
    + seq_printf(s, "\tmds%d\t%u.%u.%u.%u:%u\t(%s)\n",
    + i,
    + IPQUADPORT(addr->ipaddr),
    + 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%u.%u.%u.%u:%u\t%3d%%\t(%s)\n",
    + i, IPQUADPORT(addr->ipaddr),
    + ((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->statfs_mutex);
    +
    + if (monc->want_osdmap)
    + seq_printf(s, "want osdmap %u\n", (unsigned)monc->want_osdmap);
    + if (monc->want_mdsmap)
    + seq_printf(s, "want mdsmap %u\n", (unsigned)monc->want_mdsmap);
    +
    + 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, "%u.%u.%u.%u:%u (%s%d)\tstatfs\n",
    + IPQUADPORT(req->request->hdr.dst.addr.ipaddr),
    + ENTITY_NAME(req->request->hdr.dst.name));
    + }
    + mutex_unlock(&monc->statfs_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;
    +
    + seq_printf(s, "%lld\t%u.%u.%u.%u:%u (%s%d)\t",
    + req->r_tid,
    + IPQUADPORT(req->r_request->hdr.dst.addr.ipaddr),
    + ENTITY_NAME(req->r_request->hdr.dst.name));
    +
    + 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 *p)
    +{
    + struct ceph_client *client = s->private;
    + struct ceph_osd_client *osdc = &client->osdc;
    + u64 nexttid = 0;
    +
    + mutex_lock(&osdc->request_mutex);
    + while (nexttid < osdc->last_tid) {
    + struct ceph_osd_request *req;
    + struct ceph_osd_request_head *head;
    + struct ceph_osd_op *op;
    + int num_ops;
    + int opcode, olen;
    + int got, i;
    +
    + got = radix_tree_gang_lookup(&osdc->request_tree,
    + (void **)&req, nexttid, 1);
    + if (got == 0)
    + break;
    +
    + nexttid = req->r_tid + 1;
    +
    + seq_printf(s, "%lld\t%u.%u.%u.%u:%u (%s%d)\t",
    + req->r_tid,
    + IPQUADPORT(req->r_request->hdr.dst.addr.ipaddr),
    + ENTITY_NAME(req->r_request->hdr.dst.name));
    +
    + 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_reservation_show(struct seq_file *s, void *p)
    +{
    + int total, avail, used, reserved;
    +
    + ceph_reservation_status(&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(fsid_show)
    +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(caps_reservation_show)
    +DEFINE_SHOW_FUNC(dentry_lru_show)
    +
    +int ceph_debugfs_init(void)
    +{
    + int ret = -ENOMEM;
    +
    + ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
    +
    + if (!ceph_debugfs_dir)
    + goto out;
    +
    + ceph_debugfs_debug = debugfs_create_u32("debug",
    + 0600,
    + ceph_debugfs_dir,
    + (u32 *)&ceph_debug);
    + if (!ceph_debugfs_debug)
    + goto out;
    +
    + ceph_debugfs_debug_msgr = debugfs_create_u32("msgr",
    + 0600,
    + ceph_debugfs_dir,
    + (u32 *)&ceph_debug_msgr);
    + if (!ceph_debugfs_debug_msgr)
    + goto out;
    +
    + ceph_debugfs_debug_console = debugfs_create_u32("console",
    + 0600,
    + ceph_debugfs_dir,
    + (u32 *)&ceph_debug_console);
    + if (!ceph_debugfs_debug_console)
    + goto out;
    +
    + ceph_debugfs_debug_mask = debugfs_create_file("mask",
    + 0600,
    + ceph_debugfs_dir,
    + NULL,
    + &ceph_debug_mask_fops);
    + if (!ceph_debugfs_debug_mask)
    + goto out;
    +
    + ceph_debugfs_caps_reservation = debugfs_create_file("caps_reservation",
    + 0400,
    + ceph_debugfs_dir,
    + NULL,
    + &caps_reservation_show_fops);
    + if (!ceph_debugfs_caps_reservation)
    + goto out;
    +
    + return 0;
    +
    +out:
    + ceph_debugfs_cleanup();
    + return ret;
    +}
    +
    +void ceph_debugfs_cleanup(void)
    +{
    + debugfs_remove(ceph_debugfs_caps_reservation);
    + debugfs_remove(ceph_debugfs_debug_console);
    + debugfs_remove(ceph_debugfs_debug_mask);
    + debugfs_remove(ceph_debugfs_debug_msgr);
    + debugfs_remove(ceph_debugfs_debug);
    + debugfs_remove(ceph_debugfs_dir);
    +}
    +
    +int ceph_debugfs_client_init(struct ceph_client *client)
    +{
    + int ret = 0;
    +#define TMP_NAME_SIZE 16
    + char name[TMP_NAME_SIZE];
    +
    + snprintf(name, TMP_NAME_SIZE, "client%d", client->whoami);
    +
    + 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 (ret)
    + goto out;
    +
    + client->mdsc.debugfs_file = debugfs_create_file("mdsc",
    + 0600,
    + client->debugfs_dir,
    + client,
    + &mdsc_show_fops);
    + if (ret)
    + goto out;
    +
    + client->osdc.debugfs_file = debugfs_create_file("osdc",
    + 0600,
    + client->debugfs_dir,
    + client,
    + &osdc_show_fops);
    + if (ret)
    + goto out;
    +
    + client->debugfs_fsid = debugfs_create_file("fsid",
    + 0600,
    + client->debugfs_dir,
    + client,
    + &fsid_show_fops);
    + if (!client->debugfs_fsid)
    + 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_osdmap)
    + goto out;
    +
    + return 0;
    +
    +out:
    + ceph_debugfs_client_cleanup(client);
    + return ret;
    +}
    +
    +void ceph_debugfs_client_cleanup(struct ceph_client *client)
    +{
    + debugfs_remove(client->monc.debugfs_file);
    + debugfs_remove(client->mdsc.debugfs_file);
    + debugfs_remove(client->osdc.debugfs_file);
    + debugfs_remove(client->debugfs_dentry_lru);
    + debugfs_remove(client->debugfs_monmap);
    + debugfs_remove(client->debugfs_mdsmap);
    + debugfs_remove(client->debugfs_osdmap);
    + debugfs_remove(client->debugfs_fsid);
    + debugfs_remove(client->debugfs_dir);
    +}
    +
    --
    1.5.6.5


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