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The two main items are support for disabling automatic rbd exclusive

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lock transfers from myself and the long awaited -ENOSPC handling series
 from Jeff.  The former will allow rbd users to take advantage of
 exclusive lock's built-in blacklist/break-lock functionality while
 staying in control of who owns the lock.  With the latter in place, we
 will abort filesystem writes on -ENOSPC instead of having them block
 indefinitely.
 
 Beyond that we've got the usual pile of filesystem fixes from Zheng,
 some refcount_t conversion patches from Elena and a patch for an
 ancient open() flags handling bug from Alexander.
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Merge tag 'ceph-for-4.12-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The two main items are support for disabling automatic rbd exclusive
  lock transfers from myself and the long awaited -ENOSPC handling
  series from Jeff.

  The former will allow rbd users to take advantage of exclusive lock's
  built-in blacklist/break-lock functionality while staying in control
  of who owns the lock. With the latter in place, we will abort
  filesystem writes on -ENOSPC instead of having them block
  indefinitely.

  Beyond that we've got the usual pile of filesystem fixes from Zheng,
  some refcount_t conversion patches from Elena and a patch for an
  ancient open() flags handling bug from Alexander"

* tag 'ceph-for-4.12-rc1' of git://github.com/ceph/ceph-client: (31 commits)
  ceph: fix memory leak in __ceph_setxattr()
  ceph: fix file open flags on ppc64
  ceph: choose readdir frag based on previous readdir reply
  rbd: exclusive map option
  rbd: return ResponseMessage result from rbd_handle_request_lock()
  rbd: kill rbd_is_lock_supported()
  rbd: support updating the lock cookie without releasing the lock
  rbd: store lock cookie
  rbd: ignore unlock errors
  rbd: fix error handling around rbd_init_disk()
  rbd: move rbd_unregister_watch() call into rbd_dev_image_release()
  rbd: move rbd_dev_destroy() call out of rbd_dev_image_release()
  ceph: when seeing write errors on an inode, switch to sync writes
  Revert "ceph: SetPageError() for writeback pages if writepages fails"
  ceph: handle epoch barriers in cap messages
  libceph: add an epoch_barrier field to struct ceph_osd_client
  libceph: abort already submitted but abortable requests when map or pool goes full
  libceph: allow requests to return immediately on full conditions if caller wishes
  libceph: remove req->r_replay_version
  ceph: make seeky readdir more efficient
  ...
This commit is contained in:
Linus Torvalds 2017-05-10 08:42:33 -07:00
commit 26c5eaa132
27 changed files with 707 additions and 278 deletions
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359
drivers/block/rbd.c
View file

@ -387,6 +387,7 @@ struct rbd_device {
struct rw_semaphore lock_rwsem;
enum rbd_lock_state lock_state;
char lock_cookie[32];
struct rbd_client_id owner_cid;
struct work_struct acquired_lock_work;
struct work_struct released_lock_work;
@ -477,13 +478,6 @@ static int minor_to_rbd_dev_id(int minor)
return minor >> RBD_SINGLE_MAJOR_PART_SHIFT;
}
static bool rbd_is_lock_supported(struct rbd_device *rbd_dev)
{
return (rbd_dev->header.features & RBD_FEATURE_EXCLUSIVE_LOCK) &&
rbd_dev->spec->snap_id == CEPH_NOSNAP &&
!rbd_dev->mapping.read_only;
}
static bool __rbd_is_lock_owner(struct rbd_device *rbd_dev)
{
return rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED ||
@ -731,7 +725,7 @@ static struct rbd_client *rbd_client_create(struct ceph_options *ceph_opts)
kref_init(&rbdc->kref);
INIT_LIST_HEAD(&rbdc->node);
rbdc->client = ceph_create_client(ceph_opts, rbdc, 0, 0);
rbdc->client = ceph_create_client(ceph_opts, rbdc);
if (IS_ERR(rbdc->client))
goto out_rbdc;
ceph_opts = NULL; /* Now rbdc->client is responsible for ceph_opts */
@ -804,6 +798,7 @@ enum {
Opt_read_only,
Opt_read_write,
Opt_lock_on_read,
Opt_exclusive,
Opt_err
};
@ -816,6 +811,7 @@ static match_table_t rbd_opts_tokens = {
{Opt_read_write, "read_write"},
{Opt_read_write, "rw"}, /* Alternate spelling */
{Opt_lock_on_read, "lock_on_read"},
{Opt_exclusive, "exclusive"},
{Opt_err, NULL}
};
@ -823,11 +819,13 @@ struct rbd_options {
int queue_depth;
bool read_only;
bool lock_on_read;
bool exclusive;
};
#define RBD_QUEUE_DEPTH_DEFAULT BLKDEV_MAX_RQ
#define RBD_READ_ONLY_DEFAULT false
#define RBD_LOCK_ON_READ_DEFAULT false
#define RBD_EXCLUSIVE_DEFAULT false
static int parse_rbd_opts_token(char *c, void *private)
{
@ -866,6 +864,9 @@ static int parse_rbd_opts_token(char *c, void *private)
case Opt_lock_on_read:
rbd_opts->lock_on_read = true;
break;
case Opt_exclusive:
rbd_opts->exclusive = true;
break;
default:
/* libceph prints "bad option" msg */
return -EINVAL;
@ -3079,7 +3080,8 @@ static int rbd_lock(struct rbd_device *rbd_dev)
char cookie[32];
int ret;
WARN_ON(__rbd_is_lock_owner(rbd_dev));
WARN_ON(__rbd_is_lock_owner(rbd_dev) ||
rbd_dev->lock_cookie[0] != '\0');
format_lock_cookie(rbd_dev, cookie);
ret = ceph_cls_lock(osdc, &rbd_dev->header_oid, &rbd_dev->header_oloc,
@ -3089,6 +3091,7 @@ static int rbd_lock(struct rbd_device *rbd_dev)
return ret;
rbd_dev->lock_state = RBD_LOCK_STATE_LOCKED;
strcpy(rbd_dev->lock_cookie, cookie);
rbd_set_owner_cid(rbd_dev, &cid);
queue_work(rbd_dev->task_wq, &rbd_dev->acquired_lock_work);
return 0;
@ -3097,27 +3100,24 @@ static int rbd_lock(struct rbd_device *rbd_dev)
/*
* lock_rwsem must be held for write
*/
static int rbd_unlock(struct rbd_device *rbd_dev)
static void rbd_unlock(struct rbd_device *rbd_dev)
{
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
char cookie[32];
int ret;
WARN_ON(!__rbd_is_lock_owner(rbd_dev));
WARN_ON(!__rbd_is_lock_owner(rbd_dev) ||
rbd_dev->lock_cookie[0] == '\0');
rbd_dev->lock_state = RBD_LOCK_STATE_UNLOCKED;
format_lock_cookie(rbd_dev, cookie);
ret = ceph_cls_unlock(osdc, &rbd_dev->header_oid, &rbd_dev->header_oloc,
RBD_LOCK_NAME, cookie);
if (ret && ret != -ENOENT) {
rbd_warn(rbd_dev, "cls_unlock failed: %d", ret);
return ret;
}
RBD_LOCK_NAME, rbd_dev->lock_cookie);
if (ret && ret != -ENOENT)
rbd_warn(rbd_dev, "failed to unlock: %d", ret);
/* treat errors as the image is unlocked */
rbd_dev->lock_state = RBD_LOCK_STATE_UNLOCKED;
rbd_dev->lock_cookie[0] = '\0';
rbd_set_owner_cid(rbd_dev, &rbd_empty_cid);
queue_work(rbd_dev->task_wq, &rbd_dev->released_lock_work);
return 0;
}
static int __rbd_notify_op_lock(struct rbd_device *rbd_dev,
@ -3447,6 +3447,18 @@ static void rbd_acquire_lock(struct work_struct *work)
ret = rbd_request_lock(rbd_dev);
if (ret == -ETIMEDOUT) {
goto again; /* treat this as a dead client */
} else if (ret == -EROFS) {
rbd_warn(rbd_dev, "peer will not release lock");
/*
* If this is rbd_add_acquire_lock(), we want to fail
* immediately -- reuse BLACKLISTED flag. Otherwise we
* want to block.
*/
if (!(rbd_dev->disk->flags & GENHD_FL_UP)) {
set_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags);
/* wake "rbd map --exclusive" process */
wake_requests(rbd_dev, false);
}
} else if (ret < 0) {
rbd_warn(rbd_dev, "error requesting lock: %d", ret);
mod_delayed_work(rbd_dev->task_wq, &rbd_dev->lock_dwork,
@ -3490,16 +3502,15 @@ static bool rbd_release_lock(struct rbd_device *rbd_dev)
if (rbd_dev->lock_state != RBD_LOCK_STATE_RELEASING)
return false;
if (!rbd_unlock(rbd_dev))
/*
* Give others a chance to grab the lock - we would re-acquire
* almost immediately if we got new IO during ceph_osdc_sync()
* otherwise. We need to ack our own notifications, so this
* lock_dwork will be requeued from rbd_wait_state_locked()
* after wake_requests() in rbd_handle_released_lock().
*/
cancel_delayed_work(&rbd_dev->lock_dwork);
rbd_unlock(rbd_dev);
/*
* Give others a chance to grab the lock - we would re-acquire
* almost immediately if we got new IO during ceph_osdc_sync()
* otherwise. We need to ack our own notifications, so this
* lock_dwork will be requeued from rbd_wait_state_locked()
* after wake_requests() in rbd_handle_released_lock().
*/
cancel_delayed_work(&rbd_dev->lock_dwork);
return true;
}
@ -3580,12 +3591,16 @@ static void rbd_handle_released_lock(struct rbd_device *rbd_dev, u8 struct_v,
up_read(&rbd_dev->lock_rwsem);
}
static bool rbd_handle_request_lock(struct rbd_device *rbd_dev, u8 struct_v,
void **p)
/*
* Returns result for ResponseMessage to be encoded (<= 0), or 1 if no
* ResponseMessage is needed.
*/
static int rbd_handle_request_lock(struct rbd_device *rbd_dev, u8 struct_v,
void **p)
{
struct rbd_client_id my_cid = rbd_get_cid(rbd_dev);
struct rbd_client_id cid = { 0 };
bool need_to_send;
int result = 1;
if (struct_v >= 2) {
cid.gid = ceph_decode_64(p);
@ -3595,19 +3610,36 @@ static bool rbd_handle_request_lock(struct rbd_device *rbd_dev, u8 struct_v,
dout("%s rbd_dev %p cid %llu-%llu\n", __func__, rbd_dev, cid.gid,
cid.handle);
if (rbd_cid_equal(&cid, &my_cid))
return false;
return result;
down_read(&rbd_dev->lock_rwsem);
need_to_send = __rbd_is_lock_owner(rbd_dev);
if (rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED) {
if (!rbd_cid_equal(&rbd_dev->owner_cid, &rbd_empty_cid)) {
dout("%s rbd_dev %p queueing unlock_work\n", __func__,
rbd_dev);
queue_work(rbd_dev->task_wq, &rbd_dev->unlock_work);
if (__rbd_is_lock_owner(rbd_dev)) {
if (rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED &&
rbd_cid_equal(&rbd_dev->owner_cid, &rbd_empty_cid))
goto out_unlock;
/*
* encode ResponseMessage(0) so the peer can detect
* a missing owner
*/
result = 0;
if (rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED) {
if (!rbd_dev->opts->exclusive) {
dout("%s rbd_dev %p queueing unlock_work\n",
__func__, rbd_dev);
queue_work(rbd_dev->task_wq,
&rbd_dev->unlock_work);
} else {
/* refuse to release the lock */
result = -EROFS;
}
}
}
out_unlock:
up_read(&rbd_dev->lock_rwsem);
return need_to_send;
return result;
}
static void __rbd_acknowledge_notify(struct rbd_device *rbd_dev,
@ -3690,13 +3722,10 @@ static void rbd_watch_cb(void *arg, u64 notify_id, u64 cookie,
rbd_acknowledge_notify(rbd_dev, notify_id, cookie);
break;
case RBD_NOTIFY_OP_REQUEST_LOCK:
if (rbd_handle_request_lock(rbd_dev, struct_v, &p))
/*
* send ResponseMessage(0) back so the client
* can detect a missing owner
*/
ret = rbd_handle_request_lock(rbd_dev, struct_v, &p);
if (ret <= 0)
rbd_acknowledge_notify_result(rbd_dev, notify_id,
cookie, 0);
cookie, ret);
else
rbd_acknowledge_notify(rbd_dev, notify_id, cookie);
break;
@ -3821,24 +3850,51 @@ static void rbd_unregister_watch(struct rbd_device *rbd_dev)
ceph_osdc_flush_notifies(&rbd_dev->rbd_client->client->osdc);
}
/*
* lock_rwsem must be held for write
*/
static void rbd_reacquire_lock(struct rbd_device *rbd_dev)
{
struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
char cookie[32];
int ret;
WARN_ON(rbd_dev->lock_state != RBD_LOCK_STATE_LOCKED);
format_lock_cookie(rbd_dev, cookie);
ret = ceph_cls_set_cookie(osdc, &rbd_dev->header_oid,
&rbd_dev->header_oloc, RBD_LOCK_NAME,
CEPH_CLS_LOCK_EXCLUSIVE, rbd_dev->lock_cookie,
RBD_LOCK_TAG, cookie);
if (ret) {
if (ret != -EOPNOTSUPP)
rbd_warn(rbd_dev, "failed to update lock cookie: %d",
ret);
/*
* Lock cookie cannot be updated on older OSDs, so do
* a manual release and queue an acquire.
*/
if (rbd_release_lock(rbd_dev))
queue_delayed_work(rbd_dev->task_wq,
&rbd_dev->lock_dwork, 0);
} else {
strcpy(rbd_dev->lock_cookie, cookie);
}
}
static void rbd_reregister_watch(struct work_struct *work)
{
struct rbd_device *rbd_dev = container_of(to_delayed_work(work),
struct rbd_device, watch_dwork);
bool was_lock_owner = false;
bool need_to_wake = false;
int ret;
dout("%s rbd_dev %p\n", __func__, rbd_dev);
down_write(&rbd_dev->lock_rwsem);
if (rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED)
was_lock_owner = rbd_release_lock(rbd_dev);
mutex_lock(&rbd_dev->watch_mutex);
if (rbd_dev->watch_state != RBD_WATCH_STATE_ERROR) {
mutex_unlock(&rbd_dev->watch_mutex);
goto out;
return;
}
ret = __rbd_register_watch(rbd_dev);
@ -3846,36 +3902,28 @@ static void rbd_reregister_watch(struct work_struct *work)
rbd_warn(rbd_dev, "failed to reregister watch: %d", ret);
if (ret == -EBLACKLISTED || ret == -ENOENT) {
set_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags);
need_to_wake = true;
wake_requests(rbd_dev, true);
} else {
queue_delayed_work(rbd_dev->task_wq,
&rbd_dev->watch_dwork,
RBD_RETRY_DELAY);
}
mutex_unlock(&rbd_dev->watch_mutex);
goto out;
return;
}
need_to_wake = true;
rbd_dev->watch_state = RBD_WATCH_STATE_REGISTERED;
rbd_dev->watch_cookie = rbd_dev->watch_handle->linger_id;
mutex_unlock(&rbd_dev->watch_mutex);
down_write(&rbd_dev->lock_rwsem);
if (rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED)
rbd_reacquire_lock(rbd_dev);
up_write(&rbd_dev->lock_rwsem);
ret = rbd_dev_refresh(rbd_dev);
if (ret)
rbd_warn(rbd_dev, "reregisteration refresh failed: %d", ret);
if (was_lock_owner) {
ret = rbd_try_lock(rbd_dev);
if (ret)
rbd_warn(rbd_dev, "reregisteration lock failed: %d",
ret);
}
out:
up_write(&rbd_dev->lock_rwsem);
if (need_to_wake)
wake_requests(rbd_dev, true);
}
/*
@ -4034,10 +4082,6 @@ static void rbd_queue_workfn(struct work_struct *work)
if (op_type != OBJ_OP_READ) {
snapc = rbd_dev->header.snapc;
ceph_get_snap_context(snapc);
must_be_locked = rbd_is_lock_supported(rbd_dev);
} else {
must_be_locked = rbd_dev->opts->lock_on_read &&
rbd_is_lock_supported(rbd_dev);
}
up_read(&rbd_dev->header_rwsem);
@ -4048,14 +4092,20 @@ static void rbd_queue_workfn(struct work_struct *work)
goto err_rq;
}
must_be_locked =
(rbd_dev->header.features & RBD_FEATURE_EXCLUSIVE_LOCK) &&
(op_type != OBJ_OP_READ || rbd_dev->opts->lock_on_read);
if (must_be_locked) {
down_read(&rbd_dev->lock_rwsem);
if (rbd_dev->lock_state != RBD_LOCK_STATE_LOCKED &&
!test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags))
!test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags)) {
if (rbd_dev->opts->exclusive) {
rbd_warn(rbd_dev, "exclusive lock required");
result = -EROFS;
goto err_unlock;
}
rbd_wait_state_locked(rbd_dev);
WARN_ON((rbd_dev->lock_state == RBD_LOCK_STATE_LOCKED) ^
!test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags));
}
if (test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags)) {
result = -EBLACKLISTED;
goto err_unlock;
@ -4114,19 +4164,10 @@ static int rbd_queue_rq(struct blk_mq_hw_ctx *hctx,
static void rbd_free_disk(struct rbd_device *rbd_dev)
{
struct gendisk *disk = rbd_dev->disk;
if (!disk)
return;
blk_cleanup_queue(rbd_dev->disk->queue);
blk_mq_free_tag_set(&rbd_dev->tag_set);
put_disk(rbd_dev->disk);
rbd_dev->disk = NULL;
if (disk->flags & GENHD_FL_UP) {
del_gendisk(disk);
if (disk->queue)
blk_cleanup_queue(disk->queue);
blk_mq_free_tag_set(&rbd_dev->tag_set);
}
put_disk(disk);
}
static int rbd_obj_read_sync(struct rbd_device *rbd_dev,
@ -4383,8 +4424,12 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC))
q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES;
/*
* disk_release() expects a queue ref from add_disk() and will
* put it. Hold an extra ref until add_disk() is called.
*/
WARN_ON(!blk_get_queue(q));
disk->queue = q;
q->queuedata = rbd_dev;
rbd_dev->disk = disk;
@ -5624,6 +5669,7 @@ static int rbd_add_parse_args(const char *buf,
rbd_opts->read_only = RBD_READ_ONLY_DEFAULT;
rbd_opts->queue_depth = RBD_QUEUE_DEPTH_DEFAULT;
rbd_opts->lock_on_read = RBD_LOCK_ON_READ_DEFAULT;
rbd_opts->exclusive = RBD_EXCLUSIVE_DEFAULT;
copts = ceph_parse_options(options, mon_addrs,
mon_addrs + mon_addrs_size - 1,
@ -5682,6 +5728,33 @@ static int rbd_add_get_pool_id(struct rbd_client *rbdc, const char *pool_name)
return ret;
}
static void rbd_dev_image_unlock(struct rbd_device *rbd_dev)
{
down_write(&rbd_dev->lock_rwsem);
if (__rbd_is_lock_owner(rbd_dev))
rbd_unlock(rbd_dev);
up_write(&rbd_dev->lock_rwsem);
}
static int rbd_add_acquire_lock(struct rbd_device *rbd_dev)
{
if (!(rbd_dev->header.features & RBD_FEATURE_EXCLUSIVE_LOCK)) {
rbd_warn(rbd_dev, "exclusive-lock feature is not enabled");
return -EINVAL;
}
/* FIXME: "rbd map --exclusive" should be in interruptible */
down_read(&rbd_dev->lock_rwsem);
rbd_wait_state_locked(rbd_dev);
up_read(&rbd_dev->lock_rwsem);
if (test_bit(RBD_DEV_FLAG_BLACKLISTED, &rbd_dev->flags)) {
rbd_warn(rbd_dev, "failed to acquire exclusive lock");
return -EROFS;
}
return 0;
}
/*
* An rbd format 2 image has a unique identifier, distinct from the
* name given to it by the user. Internally, that identifier is
@ -5873,6 +5946,15 @@ static int rbd_dev_probe_parent(struct rbd_device *rbd_dev, int depth)
return ret;
}
static void rbd_dev_device_release(struct rbd_device *rbd_dev)
{
clear_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
rbd_dev_mapping_clear(rbd_dev);
rbd_free_disk(rbd_dev);
if (!single_major)
unregister_blkdev(rbd_dev->major, rbd_dev->name);
}
/*
* rbd_dev->header_rwsem must be locked for write and will be unlocked
* upon return.
@ -5908,26 +5990,13 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);
dev_set_name(&rbd_dev->dev, "%d", rbd_dev->dev_id);
ret = device_add(&rbd_dev->dev);
ret = dev_set_name(&rbd_dev->dev, "%d", rbd_dev->dev_id);
if (ret)
goto err_out_mapping;
/* Everything's ready. Announce the disk to the world. */
set_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
up_write(&rbd_dev->header_rwsem);
spin_lock(&rbd_dev_list_lock);
list_add_tail(&rbd_dev->node, &rbd_dev_list);
spin_unlock(&rbd_dev_list_lock);
add_disk(rbd_dev->disk);
pr_info("%s: capacity %llu features 0x%llx\n", rbd_dev->disk->disk_name,
(unsigned long long)get_capacity(rbd_dev->disk) << SECTOR_SHIFT,
rbd_dev->header.features);
return ret;
return 0;
err_out_mapping:
rbd_dev_mapping_clear(rbd_dev);
@ -5962,11 +6031,11 @@ static int rbd_dev_header_name(struct rbd_device *rbd_dev)
static void rbd_dev_image_release(struct rbd_device *rbd_dev)
{
rbd_dev_unprobe(rbd_dev);
if (rbd_dev->opts)
rbd_unregister_watch(rbd_dev);
rbd_dev->image_format = 0;
kfree(rbd_dev->spec->image_id);
rbd_dev->spec->image_id = NULL;
rbd_dev_destroy(rbd_dev);
}
/*
@ -6126,22 +6195,43 @@ static ssize_t do_rbd_add(struct bus_type *bus,
rbd_dev->mapping.read_only = read_only;
rc = rbd_dev_device_setup(rbd_dev);
if (rc) {
/*
* rbd_unregister_watch() can't be moved into
* rbd_dev_image_release() without refactoring, see
* commit 1f3ef78861ac.
*/
rbd_unregister_watch(rbd_dev);
rbd_dev_image_release(rbd_dev);
goto out;
if (rc)
goto err_out_image_probe;
if (rbd_dev->opts->exclusive) {
rc = rbd_add_acquire_lock(rbd_dev);
if (rc)
goto err_out_device_setup;
}
/* Everything's ready. Announce the disk to the world. */
rc = device_add(&rbd_dev->dev);
if (rc)
goto err_out_image_lock;
add_disk(rbd_dev->disk);
/* see rbd_init_disk() */
blk_put_queue(rbd_dev->disk->queue);
spin_lock(&rbd_dev_list_lock);
list_add_tail(&rbd_dev->node, &rbd_dev_list);
spin_unlock(&rbd_dev_list_lock);
pr_info("%s: capacity %llu features 0x%llx\n", rbd_dev->disk->disk_name,
(unsigned long long)get_capacity(rbd_dev->disk) << SECTOR_SHIFT,
rbd_dev->header.features);
rc = count;
out:
module_put(THIS_MODULE);
return rc;
err_out_image_lock:
rbd_dev_image_unlock(rbd_dev);
err_out_device_setup:
rbd_dev_device_release(rbd_dev);
err_out_image_probe:
rbd_dev_image_release(rbd_dev);
err_out_rbd_dev:
rbd_dev_destroy(rbd_dev);
err_out_client:
@ -6169,21 +6259,6 @@ static ssize_t rbd_add_single_major(struct bus_type *bus,
return do_rbd_add(bus, buf, count);
}
static void rbd_dev_device_release(struct rbd_device *rbd_dev)
{
rbd_free_disk(rbd_dev);
spin_lock(&rbd_dev_list_lock);
list_del_init(&rbd_dev->node);
spin_unlock(&rbd_dev_list_lock);
clear_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
device_del(&rbd_dev->dev);
rbd_dev_mapping_clear(rbd_dev);
if (!single_major)
unregister_blkdev(rbd_dev->major, rbd_dev->name);
}
static void rbd_dev_remove_parent(struct rbd_device *rbd_dev)
{
while (rbd_dev->parent) {
@ -6201,6 +6276,7 @@ static void rbd_dev_remove_parent(struct rbd_device *rbd_dev)
}
rbd_assert(second);
rbd_dev_image_release(second);
rbd_dev_destroy(second);
first->parent = NULL;
first->parent_overlap = 0;
@ -6269,21 +6345,16 @@ static ssize_t do_rbd_remove(struct bus_type *bus,
blk_set_queue_dying(rbd_dev->disk->queue);
}
down_write(&rbd_dev->lock_rwsem);
if (__rbd_is_lock_owner(rbd_dev))
rbd_unlock(rbd_dev);
up_write(&rbd_dev->lock_rwsem);
rbd_unregister_watch(rbd_dev);
del_gendisk(rbd_dev->disk);
spin_lock(&rbd_dev_list_lock);
list_del_init(&rbd_dev->node);
spin_unlock(&rbd_dev_list_lock);
device_del(&rbd_dev->dev);
/*
* Don't free anything from rbd_dev->disk until after all
* notifies are completely processed. Otherwise
* rbd_bus_del_dev() will race with rbd_watch_cb(), resulting
* in a potential use after free of rbd_dev->disk or rbd_dev.
*/
rbd_dev_image_unlock(rbd_dev);
rbd_dev_device_release(rbd_dev);
rbd_dev_image_release(rbd_dev);
rbd_dev_destroy(rbd_dev);
return count;
}

10
fs/ceph/addr.c
View file

@ -670,8 +670,12 @@ static void writepages_finish(struct ceph_osd_request *req)
bool remove_page;
dout("writepages_finish %p rc %d\n", inode, rc);
if (rc < 0)
if (rc < 0) {
mapping_set_error(mapping, rc);
ceph_set_error_write(ci);
} else {
ceph_clear_error_write(ci);
}
/*
* We lost the cache cap, need to truncate the page before
@ -703,9 +707,6 @@ static void writepages_finish(struct ceph_osd_request *req)
clear_bdi_congested(inode_to_bdi(inode),
BLK_RW_ASYNC);
if (rc < 0)
SetPageError(page);
ceph_put_snap_context(page_snap_context(page));
page->private = 0;
ClearPagePrivate(page);
@ -1892,6 +1893,7 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci,
err = ceph_osdc_start_request(&fsc->client->osdc, rd_req, false);
wr_req->r_mtime = ci->vfs_inode.i_mtime;
wr_req->r_abort_on_full = true;
err2 = ceph_osdc_start_request(&fsc->client->osdc, wr_req, false);
if (!err)

25
fs/ceph/caps.c
View file

@ -1015,6 +1015,7 @@ static int send_cap_msg(struct cap_msg_args *arg)
void *p;
size_t extra_len;
struct timespec zerotime = {0};
struct ceph_osd_client *osdc = &arg->session->s_mdsc->fsc->client->osdc;
dout("send_cap_msg %s %llx %llx caps %s wanted %s dirty %s"
" seq %u/%u tid %llu/%llu mseq %u follows %lld size %llu/%llu"
@ -1076,8 +1077,12 @@ static int send_cap_msg(struct cap_msg_args *arg)
ceph_encode_64(&p, arg->inline_data ? 0 : CEPH_INLINE_NONE);
/* inline data size */
ceph_encode_32(&p, 0);
/* osd_epoch_barrier (version 5) */
ceph_encode_32(&p, 0);
/*
* osd_epoch_barrier (version 5)
* The epoch_barrier is protected osdc->lock, so READ_ONCE here in
* case it was recently changed
*/
ceph_encode_32(&p, READ_ONCE(osdc->epoch_barrier));
/* oldest_flush_tid (version 6) */
ceph_encode_64(&p, arg->oldest_flush_tid);
@ -1389,7 +1394,7 @@ static void __ceph_flush_snaps(struct ceph_inode_info *ci,
first_tid = cf->tid + 1;
capsnap = container_of(cf, struct ceph_cap_snap, cap_flush);
atomic_inc(&capsnap->nref);
refcount_inc(&capsnap->nref);
spin_unlock(&ci->i_ceph_lock);
dout("__flush_snaps %p capsnap %p tid %llu %s\n",
@ -2202,7 +2207,7 @@ static void __kick_flushing_caps(struct ceph_mds_client *mdsc,
inode, capsnap, cf->tid,
ceph_cap_string(capsnap->dirty));
atomic_inc(&capsnap->nref);
refcount_inc(&capsnap->nref);
spin_unlock(&ci->i_ceph_lock);
ret = __send_flush_snap(inode, session, capsnap, cap->mseq,
@ -3633,13 +3638,19 @@ void ceph_handle_caps(struct ceph_mds_session *session,
p += inline_len;
}
if (le16_to_cpu(msg->hdr.version) >= 5) {
struct ceph_osd_client *osdc = &mdsc->fsc->client->osdc;
u32 epoch_barrier;
ceph_decode_32_safe(&p, end, epoch_barrier, bad);
ceph_osdc_update_epoch_barrier(osdc, epoch_barrier);
}
if (le16_to_cpu(msg->hdr.version) >= 8) {
u64 flush_tid;
u32 caller_uid, caller_gid;
u32 osd_epoch_barrier;
u32 pool_ns_len;
/* version >= 5 */
ceph_decode_32_safe(&p, end, osd_epoch_barrier, bad);
/* version >= 6 */
ceph_decode_64_safe(&p, end, flush_tid, bad);
/* version >= 7 */

21
fs/ceph/debugfs.c
View file

@ -22,20 +22,19 @@ static int mdsmap_show(struct seq_file *s, void *p)
{
int i;
struct ceph_fs_client *fsc = s->private;
struct ceph_mdsmap *mdsmap;
if (fsc->mdsc == NULL || fsc->mdsc->mdsmap == NULL)
return 0;
seq_printf(s, "epoch %d\n", fsc->mdsc->mdsmap->m_epoch);
seq_printf(s, "root %d\n", fsc->mdsc->mdsmap->m_root);
seq_printf(s, "session_timeout %d\n",
fsc->mdsc->mdsmap->m_session_timeout);
seq_printf(s, "session_autoclose %d\n",
fsc->mdsc->mdsmap->m_session_autoclose);
for (i = 0; i < fsc->mdsc->mdsmap->m_max_mds; i++) {
struct ceph_entity_addr *addr =
&fsc->mdsc->mdsmap->m_info[i].addr;
int state = fsc->mdsc->mdsmap->m_info[i].state;
mdsmap = fsc->mdsc->mdsmap;
seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
seq_printf(s, "root %d\n", mdsmap->m_root);
seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
for (i = 0; i < mdsmap->m_num_mds; i++) {
struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
int state = mdsmap->m_info[i].state;
seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
ceph_pr_addr(&addr->in_addr),
ceph_mds_state_name(state));

23
fs/ceph/dir.c
View file

@ -294,7 +294,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
struct ceph_mds_client *mdsc = fsc->mdsc;
int i;
int err;
u32 ftype;
unsigned frag = -1;
struct ceph_mds_reply_info_parsed *rinfo;
dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos);
@ -341,7 +341,6 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
/* do we have the correct frag content buffered? */
if (need_send_readdir(fi, ctx->pos)) {
struct ceph_mds_request *req;
unsigned frag;
int op = ceph_snap(inode) == CEPH_SNAPDIR ?
CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
@ -352,8 +351,11 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
}
if (is_hash_order(ctx->pos)) {
frag = ceph_choose_frag(ci, fpos_hash(ctx->pos),
NULL, NULL);
/* fragtree isn't always accurate. choose frag
* based on previous reply when possible. */
if (frag == (unsigned)-1)
frag = ceph_choose_frag(ci, fpos_hash(ctx->pos),
NULL, NULL);
} else {
frag = fpos_frag(ctx->pos);
}
@ -378,7 +380,11 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
ceph_mdsc_put_request(req);
return -ENOMEM;
}
} else if (is_hash_order(ctx->pos)) {
req->r_args.readdir.offset_hash =
cpu_to_le32(fpos_hash(ctx->pos));
}
req->r_dir_release_cnt = fi->dir_release_count;
req->r_dir_ordered_cnt = fi->dir_ordered_count;
req->r_readdir_cache_idx = fi->readdir_cache_idx;
@ -476,6 +482,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
struct ceph_vino vino;
ino_t ino;
u32 ftype;
BUG_ON(rde->offset < ctx->pos);
@ -498,15 +505,17 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
ctx->pos++;
}
ceph_mdsc_put_request(fi->last_readdir);
fi->last_readdir = NULL;
if (fi->next_offset > 2) {
ceph_mdsc_put_request(fi->last_readdir);
fi->last_readdir = NULL;
frag = fi->frag;
goto more;
}
/* more frags? */
if (!ceph_frag_is_rightmost(fi->frag)) {
unsigned frag = ceph_frag_next(fi->frag);
frag = ceph_frag_next(fi->frag);
if (is_hash_order(ctx->pos)) {
loff_t new_pos = ceph_make_fpos(ceph_frag_value(frag),
fi->next_offset, true);

68
fs/ceph/file.c
View file

@ -13,6 +13,38 @@
#include "mds_client.h"
#include "cache.h"
static __le32 ceph_flags_sys2wire(u32 flags)
{
u32 wire_flags = 0;
switch (flags & O_ACCMODE) {
case O_RDONLY:
wire_flags |= CEPH_O_RDONLY;
break;
case O_WRONLY:
wire_flags |= CEPH_O_WRONLY;
break;
case O_RDWR:
wire_flags |= CEPH_O_RDWR;
break;
}
#define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
ceph_sys2wire(O_CREAT);
ceph_sys2wire(O_EXCL);
ceph_sys2wire(O_TRUNC);
ceph_sys2wire(O_DIRECTORY);
ceph_sys2wire(O_NOFOLLOW);
#undef ceph_sys2wire
if (flags)
dout("unused open flags: %x", flags);
return cpu_to_le32(wire_flags);
}
/*
* Ceph file operations
*
@ -120,7 +152,7 @@ prepare_open_request(struct super_block *sb, int flags, int create_mode)
if (IS_ERR(req))
goto out;
req->r_fmode = ceph_flags_to_mode(flags);
req->r_args.open.flags = cpu_to_le32(flags);
req->r_args.open.flags = ceph_flags_sys2wire(flags);
req->r_args.open.mode = cpu_to_le32(create_mode);
out:
return req;
@ -189,7 +221,7 @@ int ceph_renew_caps(struct inode *inode)
spin_lock(&ci->i_ceph_lock);
wanted = __ceph_caps_file_wanted(ci);
if (__ceph_is_any_real_caps(ci) &&
(!(wanted & CEPH_CAP_ANY_WR) == 0 || ci->i_auth_cap)) {
(!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
int issued = __ceph_caps_issued(ci, NULL);
spin_unlock(&ci->i_ceph_lock);
dout("renew caps %p want %s issued %s updating mds_wanted\n",
@ -778,6 +810,7 @@ static void ceph_aio_retry_work(struct work_struct *work)
req->r_callback = ceph_aio_complete_req;
req->r_inode = inode;
req->r_priv = aio_req;
req->r_abort_on_full = true;
ret = ceph_osdc_start_request(req->r_osdc, req, false);
out:
@ -1085,19 +1118,22 @@ ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
out:
ceph_osdc_put_request(req);
if (ret == 0) {
pos += len;
written += len;
if (pos > i_size_read(inode)) {
check_caps = ceph_inode_set_size(inode, pos);
if (check_caps)
ceph_check_caps(ceph_inode(inode),
CHECK_CAPS_AUTHONLY,
NULL);
}
} else
if (ret != 0) {
ceph_set_error_write(ci);
break;
}
ceph_clear_error_write(ci);
pos += len;
written += len;
if (pos > i_size_read(inode)) {
check_caps = ceph_inode_set_size(inode, pos);
if (check_caps)
ceph_check_caps(ceph_inode(inode),
CHECK_CAPS_AUTHONLY,
NULL);
}
}
if (ret != -EOLDSNAPC && written > 0) {
@ -1303,6 +1339,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
}
retry_snap:
/* FIXME: not complete since it doesn't account for being at quota */
if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL)) {
err = -ENOSPC;
goto out;
@ -1324,7 +1361,8 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
inode, ceph_vinop(inode), pos, count, ceph_cap_string(got));
if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 ||
(iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC)) {
(iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) ||
(ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) {
struct ceph_snap_context *snapc;
struct iov_iter data;
inode_unlock(inode);

17
fs/ceph/inode.c
View file

@ -1482,10 +1482,17 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
return readdir_prepopulate_inodes_only(req, session);
if (rinfo->hash_order && req->r_path2) {
last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
req->r_path2, strlen(req->r_path2));
last_hash = ceph_frag_value(last_hash);
if (rinfo->hash_order) {
if (req->r_path2) {
last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
req->r_path2,
strlen(req->r_path2));
last_hash = ceph_frag_value(last_hash);
} else if (rinfo->offset_hash) {
/* mds understands offset_hash */
WARN_ON_ONCE(req->r_readdir_offset != 2);
last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
}
}
if (rinfo->dir_dir &&
@ -1510,7 +1517,7 @@ int ceph_readdir_prepopulate(struct ceph_mds_request *req,
}
if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2 &&
!(rinfo->hash_order && req->r_path2)) {
!(rinfo->hash_order && last_hash)) {
/* note dir version at start of readdir so we can tell
* if any dentries get dropped */
req->r_dir_release_cnt = atomic64_read(&ci->i_release_count);

77
fs/ceph/mds_client.c
View file

@ -189,6 +189,7 @@ static int parse_reply_info_dir(void **p, void *end,
info->dir_end = !!(flags & CEPH_READDIR_FRAG_END);
info->dir_complete = !!(flags & CEPH_READDIR_FRAG_COMPLETE);
info->hash_order = !!(flags & CEPH_READDIR_HASH_ORDER);
info->offset_hash = !!(flags & CEPH_READDIR_OFFSET_HASH);
}
if (num == 0)
goto done;
@ -378,9 +379,9 @@ const char *ceph_session_state_name(int s)
static struct ceph_mds_session *get_session(struct ceph_mds_session *s)
{
if (atomic_inc_not_zero(&s->s_ref)) {
if (refcount_inc_not_zero(&s->s_ref)) {
dout("mdsc get_session %p %d -> %d\n", s,
atomic_read(&s->s_ref)-1, atomic_read(&s->s_ref));
refcount_read(&s->s_ref)-1, refcount_read(&s->s_ref));
return s;
} else {
dout("mdsc get_session %p 0 -- FAIL", s);
@ -391,8 +392,8 @@ static struct ceph_mds_session *get_session(struct ceph_mds_session *s)
void ceph_put_mds_session(struct ceph_mds_session *s)
{
dout("mdsc put_session %p %d -> %d\n", s,
atomic_read(&s->s_ref), atomic_read(&s->s_ref)-1);
if (atomic_dec_and_test(&s->s_ref)) {
refcount_read(&s->s_ref), refcount_read(&s->s_ref)-1);
if (refcount_dec_and_test(&s->s_ref)) {
if (s->s_auth.authorizer)
ceph_auth_destroy_authorizer(s->s_auth.authorizer);
kfree(s);
@ -411,7 +412,7 @@ struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc,
return NULL;
session = mdsc->sessions[mds];
dout("lookup_mds_session %p %d\n", session,
atomic_read(&session->s_ref));
refcount_read(&session->s_ref));
get_session(session);
return session;
}
@ -441,7 +442,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
{
struct ceph_mds_session *s;
if (mds >= mdsc->mdsmap->m_max_mds)
if (mds >= mdsc->mdsmap->m_num_mds)
return ERR_PTR(-EINVAL);
s = kzalloc(sizeof(*s), GFP_NOFS);
@ -466,7 +467,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
INIT_LIST_HEAD(&s->s_caps);
s->s_nr_caps = 0;
s->s_trim_caps = 0;
atomic_set(&s->s_ref, 1);
refcount_set(&s->s_ref, 1);
INIT_LIST_HEAD(&s->s_waiting);
INIT_LIST_HEAD(&s->s_unsafe);
s->s_num_cap_releases = 0;
@ -494,7 +495,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
}
mdsc->sessions[mds] = s;
atomic_inc(&mdsc->num_sessions);
atomic_inc(&s->s_ref); /* one ref to sessions[], one to caller */
refcount_inc(&s->s_ref); /* one ref to sessions[], one to caller */
ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds,
ceph_mdsmap_get_addr(mdsc->mdsmap, mds));
@ -1004,7 +1005,7 @@ static void __open_export_target_sessions(struct ceph_mds_client *mdsc,
struct ceph_mds_session *ts;
int i, mds = session->s_mds;
if (mds >= mdsc->mdsmap->m_max_mds)
if (mds >= mdsc->mdsmap->m_num_mds)
return;
mi = &mdsc->mdsmap->m_info[mds];
@ -1551,9 +1552,15 @@ void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
struct ceph_msg *msg = NULL;
struct ceph_mds_cap_release *head;
struct ceph_mds_cap_item *item;
struct ceph_osd_client *osdc = &mdsc->fsc->client->osdc;
struct ceph_cap *cap;
LIST_HEAD(tmp_list);
int num_cap_releases;
__le32 barrier, *cap_barrier;
down_read(&osdc->lock);
barrier = cpu_to_le32(osdc->epoch_barrier);
up_read(&osdc->lock);
spin_lock(&session->s_cap_lock);
again:
@ -1571,7 +1578,11 @@ void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
head = msg->front.iov_base;
head->num = cpu_to_le32(0);
msg->front.iov_len = sizeof(*head);
msg->hdr.version = cpu_to_le16(2);
msg->hdr.compat_version = cpu_to_le16(1);
}
cap = list_first_entry(&tmp_list, struct ceph_cap,
session_caps);
list_del(&cap->session_caps);
@ -1589,6 +1600,11 @@ void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
ceph_put_cap(mdsc, cap);
if (le32_to_cpu(head->num) == CEPH_CAPS_PER_RELEASE) {
// Append cap_barrier field
cap_barrier = msg->front.iov_base + msg->front.iov_len;
*cap_barrier = barrier;
msg->front.iov_len += sizeof(*cap_barrier);
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
dout("send_cap_releases mds%d %p\n", session->s_mds, msg);
ceph_con_send(&session->s_con, msg);
@ -1604,6 +1620,11 @@ void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
spin_unlock(&session->s_cap_lock);
if (msg) {
// Append cap_barrier field
cap_barrier = msg->front.iov_base + msg->front.iov_len;
*cap_barrier = barrier;
msg->front.iov_len += sizeof(*cap_barrier);
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
dout("send_cap_releases mds%d %p\n", session->s_mds, msg);
ceph_con_send(&session->s_con, msg);
@ -1993,7 +2014,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
if (req->r_pagelist) {
struct ceph_pagelist *pagelist = req->r_pagelist;
atomic_inc(&pagelist->refcnt);
refcount_inc(&pagelist->refcnt);
ceph_msg_data_add_pagelist(msg, pagelist);
msg->hdr.data_len = cpu_to_le32(pagelist->length);
} else {
@ -2640,8 +2661,10 @@ static void handle_session(struct ceph_mds_session *session,
seq = le64_to_cpu(h->seq);
mutex_lock(&mdsc->mutex);
if (op == CEPH_SESSION_CLOSE)
if (op == CEPH_SESSION_CLOSE) {
get_session(session);
__unregister_session(mdsc, session);
}
/* FIXME: this ttl calculation is generous */
session->s_ttl = jiffies + HZ*mdsc->mdsmap->m_session_autoclose;
mutex_unlock(&mdsc->mutex);
@ -2730,6 +2753,8 @@ static void handle_session(struct ceph_mds_session *session,
kick_requests(mdsc, mds);
mutex_unlock(&mdsc->mutex);
}
if (op == CEPH_SESSION_CLOSE)
ceph_put_mds_session(session);
return;
bad:
@ -3109,7 +3134,7 @@ static void check_new_map(struct ceph_mds_client *mdsc,
dout("check_new_map new %u old %u\n",
newmap->m_epoch, oldmap->m_epoch);
for (i = 0; i < oldmap->m_max_mds && i < mdsc->max_sessions; i++) {
for (i = 0; i < oldmap->m_num_mds && i < mdsc->max_sessions; i++) {
if (mdsc->sessions[i] == NULL)
continue;
s = mdsc->sessions[i];
@ -3123,15 +3148,33 @@ static void check_new_map(struct ceph_mds_client *mdsc,
ceph_mdsmap_is_laggy(newmap, i) ? " (laggy)" : "",
ceph_session_state_name(s->s_state));
if (i >= newmap->m_max_mds ||
if (i >= newmap->m_num_mds ||
memcmp(ceph_mdsmap_get_addr(oldmap, i),
ceph_mdsmap_get_addr(newmap, i),
sizeof(struct ceph_entity_addr))) {
if (s->s_state == CEPH_MDS_SESSION_OPENING) {
/* the session never opened, just close it
* out now */
__wake_requests(mdsc, &s->s_waiting);
get_session(s);
__unregister_session(mdsc, s);
__wake_requests(mdsc, &s->s_waiting);
ceph_put_mds_session(s);
} else if (i >= newmap->m_num_mds) {
/* force close session for stopped mds */
get_session(s);
__unregister_session(mdsc, s);
__wake_requests(mdsc, &s->s_waiting);
kick_requests(mdsc, i);
mutex_unlock(&mdsc->mutex);
mutex_lock(&s->s_mutex);
cleanup_session_requests(mdsc, s);
remove_session_caps(s);
mutex_unlock(&s->s_mutex);
ceph_put_mds_session(s);
mutex_lock(&mdsc->mutex);
} else {
/* just close it */
mutex_unlock(&mdsc->mutex);
@ -3169,7 +3212,7 @@ static void check_new_map(struct ceph_mds_client *mdsc,
}
}
for (i = 0; i < newmap->m_max_mds && i < mdsc->max_sessions; i++) {
for (i = 0; i < newmap->m_num_mds && i < mdsc->max_sessions; i++) {
s = mdsc->sessions[i];
if (!s)
continue;
@ -3883,7 +3926,7 @@ static struct ceph_connection *con_get(struct ceph_connection *con)
struct ceph_mds_session *s = con->private;
if (get_session(s)) {
dout("mdsc con_get %p ok (%d)\n", s, atomic_read(&s->s_ref));
dout("mdsc con_get %p ok (%d)\n", s, refcount_read(&s->s_ref));
return con;
}
dout("mdsc con_get %p FAIL\n", s);
@ -3894,7 +3937,7 @@ static void con_put(struct ceph_connection *con)
{
struct ceph_mds_session *s = con->private;
dout("mdsc con_put %p (%d)\n", s, atomic_read(&s->s_ref) - 1);
dout("mdsc con_put %p (%d)\n", s, refcount_read(&s->s_ref) - 1);
ceph_put_mds_session(s);
}

15
fs/ceph/mds_client.h
View file

@ -7,6 +7,7 @@
#include <linux/mutex.h>
#include <linux/rbtree.h>
#include <linux/spinlock.h>
#include <linux/refcount.h>
#include <linux/ceph/types.h>
#include <linux/ceph/messenger.h>
@ -82,9 +83,10 @@ struct ceph_mds_reply_info_parsed {
struct ceph_mds_reply_dirfrag *dir_dir;
size_t dir_buf_size;
int dir_nr;
bool dir_complete;
bool dir_end;
bool dir_complete;
bool hash_order;
bool offset_hash;
struct ceph_mds_reply_dir_entry *dir_entries;
};
@ -104,10 +106,13 @@ struct ceph_mds_reply_info_parsed {
/*
* cap releases are batched and sent to the MDS en masse.
*
* Account for per-message overhead of mds_cap_release header
* and __le32 for osd epoch barrier trailing field.
*/
#define CEPH_CAPS_PER_RELEASE ((PAGE_SIZE - \
#define CEPH_CAPS_PER_RELEASE ((PAGE_SIZE - sizeof(u32) - \
sizeof(struct ceph_mds_cap_release)) / \
sizeof(struct ceph_mds_cap_item))
sizeof(struct ceph_mds_cap_item))
/*
@ -156,7 +161,7 @@ struct ceph_mds_session {
unsigned long s_renew_requested; /* last time we sent a renew req */
u64 s_renew_seq;
atomic_t s_ref;
refcount_t s_ref;
struct list_head s_waiting; /* waiting requests */
struct list_head s_unsafe; /* unsafe requests */
};
@ -373,7 +378,7 @@ __ceph_lookup_mds_session(struct ceph_mds_client *, int mds);
static inline struct ceph_mds_session *
ceph_get_mds_session(struct ceph_mds_session *s)
{
atomic_inc(&s->s_ref);
refcount_inc(&s->s_ref);
return s;
}

44
fs/ceph/mdsmap.c
View file

@ -22,11 +22,11 @@ int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
int i;
/* special case for one mds */
if (1 == m->m_max_mds && m->m_info[0].state > 0)
if (1 == m->m_num_mds && m->m_info[0].state > 0)
return 0;
/* count */
for (i = 0; i < m->m_max_mds; i++)
for (i = 0; i < m->m_num_mds; i++)
if (m->m_info[i].state > 0)
n++;
if (n == 0)
@ -135,8 +135,9 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
m->m_session_autoclose = ceph_decode_32(p);
m->m_max_file_size = ceph_decode_64(p);
m->m_max_mds = ceph_decode_32(p);
m->m_num_mds = m->m_max_mds;
m->m_info = kcalloc(m->m_max_mds, sizeof(*m->m_info), GFP_NOFS);
m->m_info = kcalloc(m->m_num_mds, sizeof(*m->m_info), GFP_NOFS);
if (m->m_info == NULL)
goto nomem;
@ -207,9 +208,20 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
ceph_pr_addr(&addr.in_addr),
ceph_mds_state_name(state));
if (mds < 0 || mds >= m->m_max_mds || state <= 0)
if (mds < 0 || state <= 0)
continue;
if (mds >= m->m_num_mds) {
int new_num = max(mds + 1, m->m_num_mds * 2);
void *new_m_info = krealloc(m->m_info,
new_num * sizeof(*m->m_info),
GFP_NOFS | __GFP_ZERO);
if (!new_m_info)
goto nomem;
m->m_info = new_m_info;
m->m_num_mds = new_num;
}
info = &m->m_info[mds];
info->global_id = global_id;
info->state = state;
@ -229,6 +241,14 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
info->export_targets = NULL;
}
}
if (m->m_num_mds > m->m_max_mds) {
/* find max up mds */
for (i = m->m_num_mds; i >= m->m_max_mds; i--) {
if (i == 0 || m->m_info[i-1].state > 0)
break;
}
m->m_num_mds = i;
}
/* pg_pools */
ceph_decode_32_safe(p, end, n, bad);
@ -270,12 +290,22 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
for (i = 0; i < n; i++) {
s32 mds = ceph_decode_32(p);
if (mds >= 0 && mds < m->m_max_mds) {
if (mds >= 0 && mds < m->m_num_mds) {
if (m->m_info[mds].laggy)
num_laggy++;
}
}
m->m_num_laggy = num_laggy;
if (n > m->m_num_mds) {
void *new_m_info = krealloc(m->m_info,
n * sizeof(*m->m_info),
GFP_NOFS | __GFP_ZERO);
if (!new_m_info)
goto nomem;
m->m_info = new_m_info;
}
m->m_num_mds = n;
}
/* inc */
@ -341,7 +371,7 @@ void ceph_mdsmap_destroy(struct ceph_mdsmap *m)
{
int i;
for (i = 0; i < m->m_max_mds; i++)
for (i = 0; i < m->m_num_mds; i++)
kfree(m->m_info[i].export_targets);
kfree(m->m_info);
kfree(m->m_data_pg_pools);
@ -357,7 +387,7 @@ bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m)
return false;
if (m->m_num_laggy > 0)
return false;
for (i = 0; i < m->m_max_mds; i++) {
for (i = 0; i < m->m_num_mds; i++) {
if (m->m_info[i].state == CEPH_MDS_STATE_ACTIVE)
nr_active++;
}

2
fs/ceph/snap.c
View file

@ -519,7 +519,7 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
capsnap->need_flush ? "" : "no_flush");
ihold(inode);
atomic_set(&capsnap->nref, 1);
refcount_set(&capsnap->nref, 1);
INIT_LIST_HEAD(&capsnap->ci_item);
capsnap->follows = old_snapc->seq;

7
fs/ceph/super.c
View file

@ -544,10 +544,6 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
struct ceph_options *opt)
{
struct ceph_fs_client *fsc;
const u64 supported_features =
CEPH_FEATURE_FLOCK | CEPH_FEATURE_DIRLAYOUTHASH |
CEPH_FEATURE_MDSENC | CEPH_FEATURE_MDS_INLINE_DATA;
const u64 required_features = 0;
int page_count;
size_t size;
int err = -ENOMEM;
@ -556,8 +552,7 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
if (!fsc)
return ERR_PTR(-ENOMEM);
fsc->client = ceph_create_client(opt, fsc, supported_features,
required_features);
fsc->client = ceph_create_client(opt, fsc);
if (IS_ERR(fsc->client)) {
err = PTR_ERR(fsc->client);
goto fail;

31
fs/ceph/super.h
View file

@ -14,6 +14,7 @@
#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/posix_acl.h>
#include <linux/refcount.h>
#include <linux/ceph/libceph.h>
@ -160,7 +161,7 @@ struct ceph_cap_flush {
* data before flushing the snapped state (tracked here) back to the MDS.
*/
struct ceph_cap_snap {
atomic_t nref;
refcount_t nref;
struct list_head ci_item;
struct ceph_cap_flush cap_flush;
@ -189,7 +190,7 @@ struct ceph_cap_snap {
static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
{
if (atomic_dec_and_test(&capsnap->nref)) {
if (refcount_dec_and_test(&capsnap->nref)) {
if (capsnap->xattr_blob)
ceph_buffer_put(capsnap->xattr_blob);
kfree(capsnap);
@ -471,6 +472,32 @@ static inline struct inode *ceph_find_inode(struct super_block *sb,
#define CEPH_I_CAP_DROPPED (1 << 8) /* caps were forcibly dropped */
#define CEPH_I_KICK_FLUSH (1 << 9) /* kick flushing caps */
#define CEPH_I_FLUSH_SNAPS (1 << 10) /* need flush snapss */
#define CEPH_I_ERROR_WRITE (1 << 11) /* have seen write errors */
/*
* We set the ERROR_WRITE bit when we start seeing write errors on an inode
* and then clear it when they start succeeding. Note that we do a lockless
* check first, and only take the lock if it looks like it needs to be changed.
* The write submission code just takes this as a hint, so we're not too
* worried if a few slip through in either direction.
*/
static inline void ceph_set_error_write(struct ceph_inode_info *ci)
{
if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
spin_lock(&ci->i_ceph_lock);
ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
spin_unlock(&ci->i_ceph_lock);
}
}
static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
{
if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
spin_lock(&ci->i_ceph_lock);
ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
spin_unlock(&ci->i_ceph_lock);
}
}
static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
long long release_count,

3
fs/ceph/xattr.c
View file

@ -392,6 +392,7 @@ static int __set_xattr(struct ceph_inode_info *ci,
if (update_xattr) {
int err = 0;
if (xattr && (flags & XATTR_CREATE))
err = -EEXIST;
else if (!xattr && (flags & XATTR_REPLACE))
@ -399,12 +400,14 @@ static int __set_xattr(struct ceph_inode_info *ci,
if (err) {
kfree(name);
kfree(val);
kfree(*newxattr);
return err;
}
if (update_xattr < 0) {
if (xattr)
__remove_xattr(ci, xattr);
kfree(name);
kfree(*newxattr);
return 0;
}
}

4
include/linux/ceph/ceph_features.h
View file

@ -105,8 +105,10 @@ static inline u64 ceph_sanitize_features(u64 features)
*/
#define CEPH_FEATURES_SUPPORTED_DEFAULT \
(CEPH_FEATURE_NOSRCADDR | \
CEPH_FEATURE_FLOCK | \
CEPH_FEATURE_SUBSCRIBE2 | \
CEPH_FEATURE_RECONNECT_SEQ | \
CEPH_FEATURE_DIRLAYOUTHASH | \
CEPH_FEATURE_PGID64 | \
CEPH_FEATURE_PGPOOL3 | \
CEPH_FEATURE_OSDENC | \
@ -114,11 +116,13 @@ static inline u64 ceph_sanitize_features(u64 features)
CEPH_FEATURE_MSG_AUTH | \
CEPH_FEATURE_CRUSH_TUNABLES2 | \
CEPH_FEATURE_REPLY_CREATE_INODE | \
CEPH_FEATURE_MDSENC | \
CEPH_FEATURE_OSDHASHPSPOOL | \
CEPH_FEATURE_OSD_CACHEPOOL | \
CEPH_FEATURE_CRUSH_V2 | \
CEPH_FEATURE_EXPORT_PEER | \
CEPH_FEATURE_OSDMAP_ENC | \
CEPH_FEATURE_MDS_INLINE_DATA | \
CEPH_FEATURE_CRUSH_TUNABLES3 | \
CEPH_FEATURE_OSD_PRIMARY_AFFINITY | \
CEPH_FEATURE_MSGR_KEEPALIVE2 | \

14
include/linux/ceph/ceph_fs.h
View file

@ -365,6 +365,19 @@ extern const char *ceph_mds_op_name(int op);
#define CEPH_READDIR_FRAG_END (1<<0)
#define CEPH_READDIR_FRAG_COMPLETE (1<<8)
#define CEPH_READDIR_HASH_ORDER (1<<9)
#define CEPH_READDIR_OFFSET_HASH (1<<10)
/*
* open request flags
*/
#define CEPH_O_RDONLY 00000000
#define CEPH_O_WRONLY 00000001
#define CEPH_O_RDWR 00000002
#define CEPH_O_CREAT 00000100
#define CEPH_O_EXCL 00000200
#define CEPH_O_TRUNC 00001000
#define CEPH_O_DIRECTORY 00200000
#define CEPH_O_NOFOLLOW 00400000
union ceph_mds_request_args {
struct {
@ -384,6 +397,7 @@ union ceph_mds_request_args {
__le32 max_entries; /* how many dentries to grab */
__le32 max_bytes;
__le16 flags;
__le32 offset_hash;
} __attribute__ ((packed)) readdir;
struct {
__le32 mode;

5
include/linux/ceph/cls_lock_client.h
View file

@ -37,6 +37,11 @@ int ceph_cls_break_lock(struct ceph_osd_client *osdc,
struct ceph_object_locator *oloc,
char *lock_name, char *cookie,
struct ceph_entity_name *locker);
int ceph_cls_set_cookie(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
char *lock_name, u8 type, char *old_cookie,
char *tag, char *new_cookie);
void ceph_free_lockers(struct ceph_locker *lockers, u32 num_lockers);

8
include/linux/ceph/libceph.h
View file

@ -14,6 +14,7 @@
#include <linux/wait.h>
#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/refcount.h>
#include <linux/ceph/types.h>
#include <linux/ceph/messenger.h>
@ -161,7 +162,7 @@ struct ceph_client {
* dirtied.
*/
struct ceph_snap_context {
atomic_t nref;
refcount_t nref;
u64 seq;
u32 num_snaps;
u64 snaps[];
@ -262,10 +263,7 @@ int ceph_print_client_options(struct seq_file *m, struct ceph_client *client);
extern void ceph_destroy_options(struct ceph_options *opt);
extern int ceph_compare_options(struct ceph_options *new_opt,
struct ceph_client *client);
extern struct ceph_client *ceph_create_client(struct ceph_options *opt,
void *private,
u64 supported_features,
u64 required_features);
struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private);
struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
u64 ceph_client_gid(struct ceph_client *client);
extern void ceph_destroy_client(struct ceph_client *client);

7
include/linux/ceph/mdsmap.h
View file

@ -25,6 +25,7 @@ struct ceph_mdsmap {
u32 m_session_autoclose; /* seconds */
u64 m_max_file_size;
u32 m_max_mds; /* size of m_addr, m_state arrays */
int m_num_mds;
struct ceph_mds_info *m_info;
/* which object pools file data can be stored in */
@ -40,7 +41,7 @@ struct ceph_mdsmap {
static inline struct ceph_entity_addr *
ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
{
if (w >= m->m_max_mds)
if (w >= m->m_num_mds)
return NULL;
return &m->m_info[w].addr;
}
@ -48,14 +49,14 @@ ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
{
BUG_ON(w < 0);
if (w >= m->m_max_mds)
if (w >= m->m_num_mds)
return CEPH_MDS_STATE_DNE;
return m->m_info[w].state;
}
static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
{
if (w >= 0 && w < m->m_max_mds)
if (w >= 0 && w < m->m_num_mds)
return m->m_info[w].laggy;
return false;
}

7
include/linux/ceph/osd_client.h
View file

@ -5,6 +5,7 @@
#include <linux/kref.h>
#include <linux/mempool.h>
#include <linux/rbtree.h>
#include <linux/refcount.h>
#include <linux/ceph/types.h>
#include <linux/ceph/osdmap.h>
@ -27,7 +28,7 @@ typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);
/* a given osd we're communicating with */
struct ceph_osd {
atomic_t o_ref;
refcount_t o_ref;
struct ceph_osd_client *o_osdc;
int o_osd;
int o_incarnation;
@ -186,12 +187,12 @@ struct ceph_osd_request {
struct timespec r_mtime; /* ditto */
u64 r_data_offset; /* ditto */
bool r_linger; /* don't resend on failure */
bool r_abort_on_full; /* return ENOSPC when full */
/* internal */
unsigned long r_stamp; /* jiffies, send or check time */
unsigned long r_start_stamp; /* jiffies */
int r_attempts;
struct ceph_eversion r_replay_version; /* aka reassert_version */
u32 r_last_force_resend;
u32 r_map_dne_bound;
@ -266,6 +267,7 @@ struct ceph_osd_client {
struct rb_root osds; /* osds */
struct list_head osd_lru; /* idle osds */
spinlock_t osd_lru_lock;
u32 epoch_barrier;
struct ceph_osd homeless_osd;
atomic64_t last_tid; /* tid of last request */
u64 last_linger_id;
@ -304,6 +306,7 @@ extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
struct ceph_msg *msg);
extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
struct ceph_msg *msg);
void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb);
extern void osd_req_op_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode, u32 flags);

6
include/linux/ceph/pagelist.h
View file

@ -2,7 +2,7 @@
#define __FS_CEPH_PAGELIST_H
#include <asm/byteorder.h>
#include <linux/atomic.h>
#include <linux/refcount.h>
#include <linux/list.h>
#include <linux/types.h>
@ -13,7 +13,7 @@ struct ceph_pagelist {
size_t room;
struct list_head free_list;
size_t num_pages_free;
atomic_t refcnt;
refcount_t refcnt;
};
struct ceph_pagelist_cursor {
@ -30,7 +30,7 @@ static inline void ceph_pagelist_init(struct ceph_pagelist *pl)
pl->room = 0;
INIT_LIST_HEAD(&pl->free_list);
pl->num_pages_free = 0;
atomic_set(&pl->refcnt, 1);
refcount_set(&pl->refcnt, 1);
}
extern void ceph_pagelist_release(struct ceph_pagelist *pl);

27
net/ceph/ceph_common.c
View file

@ -45,6 +45,17 @@ bool libceph_compatible(void *data)
}
EXPORT_SYMBOL(libceph_compatible);
static int param_get_supported_features(char *buffer,
const struct kernel_param *kp)
{
return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
}
static const struct kernel_param_ops param_ops_supported_features = {
.get = param_get_supported_features,
};
module_param_cb(supported_features, &param_ops_supported_features, NULL,
S_IRUGO);
/*
* find filename portion of a path (/foo/bar/baz -> baz)
*/
@ -596,9 +607,7 @@ EXPORT_SYMBOL(ceph_client_gid);
/*
* create a fresh client instance
*/
struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
u64 supported_features,
u64 required_features)
struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
{
struct ceph_client *client;
struct ceph_entity_addr *myaddr = NULL;
@ -615,14 +624,12 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
init_waitqueue_head(&client->auth_wq);
client->auth_err = 0;
if (!ceph_test_opt(client, NOMSGAUTH))
required_features |= CEPH_FEATURE_MSG_AUTH;
client->extra_mon_dispatch = NULL;
client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
supported_features;
client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
required_features;
client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
if (!ceph_test_opt(client, NOMSGAUTH))
client->required_features |= CEPH_FEATURE_MSG_AUTH;
/* msgr */
if (ceph_test_opt(client, MYIP))

51
net/ceph/cls_lock_client.c
View file

@ -179,6 +179,57 @@ int ceph_cls_break_lock(struct ceph_osd_client *osdc,
}
EXPORT_SYMBOL(ceph_cls_break_lock);
int ceph_cls_set_cookie(struct ceph_osd_client *osdc,
struct ceph_object_id *oid,
struct ceph_object_locator *oloc,
char *lock_name, u8 type, char *old_cookie,
char *tag, char *new_cookie)
{
int cookie_op_buf_size;
int name_len = strlen(lock_name);
int old_cookie_len = strlen(old_cookie);
int tag_len = strlen(tag);
int new_cookie_len = strlen(new_cookie);
void *p, *end;
struct page *cookie_op_page;
int ret;
cookie_op_buf_size = name_len + sizeof(__le32) +
old_cookie_len + sizeof(__le32) +
tag_len + sizeof(__le32) +
new_cookie_len + sizeof(__le32) +
sizeof(u8) + CEPH_ENCODING_START_BLK_LEN;
if (cookie_op_buf_size > PAGE_SIZE)
return -E2BIG;
cookie_op_page = alloc_page(GFP_NOIO);
if (!cookie_op_page)
return -ENOMEM;
p = page_address(cookie_op_page);
end = p + cookie_op_buf_size;
/* encode cls_lock_set_cookie_op struct */
ceph_start_encoding(&p, 1, 1,
cookie_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
ceph_encode_string(&p, end, lock_name, name_len);
ceph_encode_8(&p, type);
ceph_encode_string(&p, end, old_cookie, old_cookie_len);
ceph_encode_string(&p, end, tag, tag_len);
ceph_encode_string(&p, end, new_cookie, new_cookie_len);
dout("%s lock_name %s type %d old_cookie %s tag %s new_cookie %s\n",
__func__, lock_name, type, old_cookie, tag, new_cookie);
ret = ceph_osdc_call(osdc, oid, oloc, "lock", "set_cookie",
CEPH_OSD_FLAG_WRITE, cookie_op_page,
cookie_op_buf_size, NULL, NULL);
dout("%s: status %d\n", __func__, ret);
__free_page(cookie_op_page);
return ret;
}
EXPORT_SYMBOL(ceph_cls_set_cookie);
void ceph_free_lockers(struct ceph_locker *lockers, u32 num_lockers)
{
int i;

7
net/ceph/debugfs.c
View file

@ -62,7 +62,8 @@ static int osdmap_show(struct seq_file *s, void *p)
return 0;
down_read(&osdc->lock);
seq_printf(s, "epoch %d flags 0x%x\n", map->epoch, map->flags);
seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch,
osdc->epoch_barrier, map->flags);
for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
struct ceph_pg_pool_info *pi =
@ -177,9 +178,7 @@ static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
seq_printf(s, "%llu\t", req->r_tid);
dump_target(s, &req->r_t);
seq_printf(s, "\t%d\t%u'%llu", req->r_attempts,
le32_to_cpu(req->r_replay_version.epoch),
le64_to_cpu(req->r_replay_version.version));
seq_printf(s, "\t%d", req->r_attempts);
for (i = 0; i < req->r_num_ops; i++) {
struct ceph_osd_req_op *op = &req->r_ops[i];

139
net/ceph/osd_client.c
View file

@ -961,6 +961,7 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
truncate_size, truncate_seq);
}
req->r_abort_on_full = true;
req->r_flags = flags;
req->r_base_oloc.pool = layout->pool_id;
req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
@ -1005,7 +1006,7 @@ static bool osd_registered(struct ceph_osd *osd)
*/
static void osd_init(struct ceph_osd *osd)
{
atomic_set(&osd->o_ref, 1);
refcount_set(&osd->o_ref, 1);
RB_CLEAR_NODE(&osd->o_node);
osd->o_requests = RB_ROOT;
osd->o_linger_requests = RB_ROOT;
@ -1050,9 +1051,9 @@ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
static struct ceph_osd *get_osd(struct ceph_osd *osd)
{
if (atomic_inc_not_zero(&osd->o_ref)) {
dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
atomic_read(&osd->o_ref));
if (refcount_inc_not_zero(&osd->o_ref)) {
dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
refcount_read(&osd->o_ref));
return osd;
} else {
dout("get_osd %p FAIL\n", osd);
@ -1062,9 +1063,9 @@ static struct ceph_osd *get_osd(struct ceph_osd *osd)
static void put_osd(struct ceph_osd *osd)
{
dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
atomic_read(&osd->o_ref) - 1);
if (atomic_dec_and_test(&osd->o_ref)) {
dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
refcount_read(&osd->o_ref) - 1);
if (refcount_dec_and_test(&osd->o_ref)) {
osd_cleanup(osd);
kfree(osd);
}
@ -1297,8 +1298,9 @@ static bool target_should_be_paused(struct ceph_osd_client *osdc,
__pool_full(pi);
WARN_ON(pi->id != t->base_oloc.pool);
return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
(t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
(osdc->osdmap->epoch < osdc->epoch_barrier);
}
enum calc_target_result {
@ -1503,9 +1505,10 @@ static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
ceph_encode_32(&p, req->r_flags);
ceph_encode_timespec(p, &req->r_mtime);
p += sizeof(struct ceph_timespec);
/* aka reassert_version */
memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
p += sizeof(req->r_replay_version);
/* reassert_version */
memset(p, 0, sizeof(struct ceph_eversion));
p += sizeof(struct ceph_eversion);
/* oloc */
ceph_start_encoding(&p, 5, 4,
@ -1626,6 +1629,7 @@ static void maybe_request_map(struct ceph_osd_client *osdc)
ceph_monc_renew_subs(&osdc->client->monc);
}
static void complete_request(struct ceph_osd_request *req, int err);
static void send_map_check(struct ceph_osd_request *req);
static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
@ -1635,6 +1639,7 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
enum calc_target_result ct_res;
bool need_send = false;
bool promoted = false;
bool need_abort = false;
WARN_ON(req->r_tid);
dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
@ -1650,8 +1655,13 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
goto promote;
}
if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
if (osdc->osdmap->epoch < osdc->epoch_barrier) {
dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
osdc->epoch_barrier);
req->r_t.paused = true;
maybe_request_map(osdc);
} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
dout("req %p pausewr\n", req);
req->r_t.paused = true;
maybe_request_map(osdc);
@ -1669,6 +1679,8 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
pr_warn_ratelimited("FULL or reached pool quota\n");
req->r_t.paused = true;
maybe_request_map(osdc);
if (req->r_abort_on_full)
need_abort = true;
} else if (!osd_homeless(osd)) {
need_send = true;
} else {
@ -1685,6 +1697,8 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
link_request(osd, req);
if (need_send)
send_request(req);
else if (need_abort)
complete_request(req, -ENOSPC);
mutex_unlock(&osd->lock);
if (ct_res == CALC_TARGET_POOL_DNE)
@ -1799,6 +1813,97 @@ static void abort_request(struct ceph_osd_request *req, int err)
complete_request(req, err);
}
static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
if (likely(eb > osdc->epoch_barrier)) {
dout("updating epoch_barrier from %u to %u\n",
osdc->epoch_barrier, eb);
osdc->epoch_barrier = eb;
/* Request map if we're not to the barrier yet */
if (eb > osdc->osdmap->epoch)
maybe_request_map(osdc);
}
}
void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
down_read(&osdc->lock);
if (unlikely(eb > osdc->epoch_barrier)) {
up_read(&osdc->lock);
down_write(&osdc->lock);
update_epoch_barrier(osdc, eb);
up_write(&osdc->lock);
} else {
up_read(&osdc->lock);
}
}
EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
/*
* Drop all pending requests that are stalled waiting on a full condition to
* clear, and complete them with ENOSPC as the return code. Set the
* osdc->epoch_barrier to the latest map epoch that we've seen if any were
* cancelled.
*/
static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
{
struct rb_node *n;
bool victims = false;
dout("enter abort_on_full\n");
if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
goto out;
/* Scan list and see if there is anything to abort */
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
struct rb_node *m;
m = rb_first(&osd->o_requests);
while (m) {
struct ceph_osd_request *req = rb_entry(m,
struct ceph_osd_request, r_node);
m = rb_next(m);
if (req->r_abort_on_full) {
victims = true;
break;
}
}
if (victims)
break;
}
if (!victims)
goto out;
/*
* Update the barrier to current epoch if it's behind that point,
* since we know we have some calls to be aborted in the tree.
*/
update_epoch_barrier(osdc, osdc->osdmap->epoch);
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
struct rb_node *m;
m = rb_first(&osd->o_requests);
while (m) {
struct ceph_osd_request *req = rb_entry(m,
struct ceph_osd_request, r_node);
m = rb_next(m);
if (req->r_abort_on_full &&
(ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
pool_full(osdc, req->r_t.target_oloc.pool)))
abort_request(req, -ENOSPC);
}
}
out:
dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
}
static void check_pool_dne(struct ceph_osd_request *req)
{
struct ceph_osd_client *osdc = req->r_osdc;
@ -3252,11 +3357,13 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
have_pool_full(osdc);
if (was_pauserd || was_pausewr || pauserd || pausewr)
if (was_pauserd || was_pausewr || pauserd || pausewr ||
osdc->osdmap->epoch < osdc->epoch_barrier)
maybe_request_map(osdc);
kick_requests(osdc, &need_resend, &need_resend_linger);
ceph_osdc_abort_on_full(osdc);
ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
osdc->osdmap->epoch);
up_write(&osdc->lock);
@ -4126,7 +4233,7 @@ void ceph_osdc_stop(struct ceph_osd_client *osdc)
close_osd(osd);
}
up_write(&osdc->lock);
WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1);
WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
osd_cleanup(&osdc->homeless_osd);
WARN_ON(!list_empty(&osdc->osd_lru));

2
net/ceph/pagelist.c
View file

@ -16,7 +16,7 @@ static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
void ceph_pagelist_release(struct ceph_pagelist *pl)
{
if (!atomic_dec_and_test(&pl->refcnt))
if (!refcount_dec_and_test(&pl->refcnt))
return;
ceph_pagelist_unmap_tail(pl);
while (!list_empty(&pl->head)) {

6
net/ceph/snapshot.c
View file

@ -49,7 +49,7 @@ struct ceph_snap_context *ceph_create_snap_context(u32 snap_count,
if (!snapc)
return NULL;
atomic_set(&snapc->nref, 1);
refcount_set(&snapc->nref, 1);
snapc->num_snaps = snap_count;
return snapc;
@ -59,7 +59,7 @@ EXPORT_SYMBOL(ceph_create_snap_context);
struct ceph_snap_context *ceph_get_snap_context(struct ceph_snap_context *sc)
{
if (sc)
atomic_inc(&sc->nref);
refcount_inc(&sc->nref);
return sc;
}
EXPORT_SYMBOL(ceph_get_snap_context);
@ -68,7 +68,7 @@ void ceph_put_snap_context(struct ceph_snap_context *sc)
{
if (!sc)
return;
if (atomic_dec_and_test(&sc->nref)) {
if (refcount_dec_and_test(&sc->nref)) {
/*printk(" deleting snap_context %p\n", sc);*/
kfree(sc);
}