kernel-ark/fs/ceph/debugfs.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

485 lines
12 KiB
C

#include "ceph_debug.h"
#include <linux/device.h>
#include <linux/slab.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
* .../bdi - symlink to ../../bdi/something
*/
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;
struct rb_node *n;
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 (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {
struct ceph_pg_pool_info *pool =
rb_entry(n, struct ceph_pg_pool_info, node);
seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
pool->id, 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;
struct ceph_mon_client *monc = &client->monc;
struct rb_node *rp;
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");
for (rp = rb_first(&monc->statfs_request_tree); rp; rp = rb_next(rp)) {
req = rb_entry(rp, struct ceph_mon_statfs_request, node);
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_client *mdsc = &client->mdsc;
struct ceph_mds_request *req;
struct rb_node *rp;
int pathlen;
u64 pathbase;
char *path;
mutex_lock(&mdsc->mutex);
for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
req = rb_entry(rp, struct ceph_mds_request, r_node);
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%d.%x\t", req->r_tid,
req->r_osd ? req->r_osd->o_osd : -1,
le32_to_cpu(req->r_pgid.pool),
le16_to_cpu(req->r_pgid.ps));
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, min;
ceph_reservation_status(client, &total, &avail, &used, &reserved, &min);
seq_printf(s, "total\t\t%d\n"
"avail\t\t%d\n"
"used\t\t%d\n"
"reserved\t%d\n"
"min\t%d\n",
total, avail, used, reserved, min);
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)
static int congestion_kb_set(void *data, u64 val)
{
struct ceph_client *client = (struct ceph_client *)data;
if (client)
client->mount_args->congestion_kb = (int)val;
return 0;
}
static int congestion_kb_get(void *data, u64 *val)
{
struct ceph_client *client = (struct ceph_client *)data;
if (client)
*val = (u64)client->mount_args->congestion_kb;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
congestion_kb_set, "%llu\n");
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;
client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
0600,
client->debugfs_dir,
client,
&congestion_kb_fops);
if (!client->debugfs_congestion_kb)
goto out;
sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
name);
return 0;
out:
ceph_debugfs_client_cleanup(client);
return ret;
}
void ceph_debugfs_client_cleanup(struct ceph_client *client)
{
debugfs_remove(client->debugfs_bdi);
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_congestion_kb);
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