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We have a set of file locking improvements from Zheng, rbd rw/ro

Browse source 
state handling code cleanup from myself and some assorted CephFS fixes
 from Jeff.
 
 rbd now defaults to single-major=Y, lifting the limit of ~240 rbd
 images per host for everyone.
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Merge tag 'ceph-for-4.15-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "We have a set of file locking improvements from Zheng, rbd rw/ro state
  handling code cleanup from myself and some assorted CephFS fixes from
  Jeff.

  rbd now defaults to single-major=Y, lifting the limit of ~240 rbd
  images per host for everyone"

* tag 'ceph-for-4.15-rc1' of git://github.com/ceph/ceph-client:
  rbd: default to single-major device number scheme
  libceph: don't WARN() if user tries to add invalid key
  rbd: set discard_alignment to zero
  ceph: silence sparse endianness warning in encode_caps_cb
  ceph: remove the bump of i_version
  ceph: present consistent fsid, regardless of arch endianness
  ceph: clean up spinlocking and list handling around cleanup_cap_releases()
  rbd: get rid of rbd_mapping::read_only
  rbd: fix and simplify rbd_ioctl_set_ro()
  ceph: remove unused and redundant variable dropping
  ceph: mark expected switch fall-throughs
  ceph: -EINVAL on decoding failure in ceph_mdsc_handle_fsmap()
  ceph: disable cached readdir after dropping positive dentry
  ceph: fix bool initialization/comparison
  ceph: handle 'session get evicted while there are file locks'
  ceph: optimize flock encoding during reconnect
  ceph: make lock_to_ceph_filelock() static
  ceph: keep auth cap when inode has flocks or posix locks
This commit is contained in:
Linus Torvalds 2017-11-21 05:38:32 -10:00
commit adb072d3cd
11 changed files with 237 additions and 150 deletions
Download patch file Download diff file Expand all files Collapse all files

65
drivers/block/rbd.c
View file

@ -348,7 +348,6 @@ struct rbd_client_id {
struct rbd_mapping {
u64 size;
u64 features;
bool read_only;
};
/*
@ -450,12 +449,11 @@ static DEFINE_IDA(rbd_dev_id_ida);
static struct workqueue_struct *rbd_wq;
/*
* Default to false for now, as single-major requires >= 0.75 version of
* userspace rbd utility.
* single-major requires >= 0.75 version of userspace rbd utility.
*/
static bool single_major = false;
static bool single_major = true;
module_param(single_major, bool, S_IRUGO);
MODULE_PARM_DESC(single_major, "Use a single major number for all rbd devices (default: false)");
MODULE_PARM_DESC(single_major, "Use a single major number for all rbd devices (default: true)");
static int rbd_img_request_submit(struct rbd_img_request *img_request);
@ -608,9 +606,6 @@ static int rbd_open(struct block_device *bdev, fmode_t mode)
struct rbd_device *rbd_dev = bdev->bd_disk->private_data;
bool removing = false;
if ((mode & FMODE_WRITE) && rbd_dev->mapping.read_only)
return -EROFS;
spin_lock_irq(&rbd_dev->lock);
if (test_bit(RBD_DEV_FLAG_REMOVING, &rbd_dev->flags))
removing = true;
@ -640,46 +635,24 @@ static void rbd_release(struct gendisk *disk, fmode_t mode)
static int rbd_ioctl_set_ro(struct rbd_device *rbd_dev, unsigned long arg)
{
int ret = 0;
int val;
bool ro;
bool ro_changed = false;
int ro;
/* get_user() may sleep, so call it before taking rbd_dev->lock */
if (get_user(val, (int __user *)(arg)))
if (get_user(ro, (int __user *)arg))
return -EFAULT;
ro = val ? true : false;
/* Snapshot doesn't allow to write*/
/* Snapshots can't be marked read-write */
if (rbd_dev->spec->snap_id != CEPH_NOSNAP && !ro)
return -EROFS;
spin_lock_irq(&rbd_dev->lock);
/* prevent others open this device */
if (rbd_dev->open_count > 1) {
ret = -EBUSY;
goto out;
}
if (rbd_dev->mapping.read_only != ro) {
rbd_dev->mapping.read_only = ro;
ro_changed = true;
}
out:
spin_unlock_irq(&rbd_dev->lock);
/* set_disk_ro() may sleep, so call it after releasing rbd_dev->lock */
if (ret == 0 && ro_changed)
set_disk_ro(rbd_dev->disk, ro ? 1 : 0);
return ret;
/* Let blkdev_roset() handle it */
return -ENOTTY;
}
static int rbd_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct rbd_device *rbd_dev = bdev->bd_disk->private_data;
int ret = 0;
int ret;
switch (cmd) {
case BLKROSET:
@ -4050,15 +4023,8 @@ static void rbd_queue_workfn(struct work_struct *work)
goto err_rq;
}
/* Only reads are allowed to a read-only device */
if (op_type != OBJ_OP_READ) {
if (rbd_dev->mapping.read_only) {
result = -EROFS;
goto err_rq;
}
rbd_assert(rbd_dev->spec->snap_id == CEPH_NOSNAP);
}
rbd_assert(op_type == OBJ_OP_READ ||
rbd_dev->spec->snap_id == CEPH_NOSNAP);
/*
* Quit early if the mapped snapshot no longer exists. It's
@ -4423,7 +4389,6 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
/* enable the discard support */
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
q->limits.discard_granularity = segment_size;
q->limits.discard_alignment = segment_size;
blk_queue_max_discard_sectors(q, segment_size / SECTOR_SIZE);
blk_queue_max_write_zeroes_sectors(q, segment_size / SECTOR_SIZE);
@ -5994,7 +5959,7 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
goto err_out_disk;
set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);
set_disk_ro(rbd_dev->disk, rbd_dev->opts->read_only);
ret = dev_set_name(&rbd_dev->dev, "%d", rbd_dev->dev_id);
if (ret)
@ -6145,7 +6110,6 @@ static ssize_t do_rbd_add(struct bus_type *bus,
struct rbd_options *rbd_opts = NULL;
struct rbd_spec *spec = NULL;
struct rbd_client *rbdc;
bool read_only;
int rc;
if (!try_module_get(THIS_MODULE))
@ -6194,11 +6158,8 @@ static ssize_t do_rbd_add(struct bus_type *bus,
}
/* If we are mapping a snapshot it must be marked read-only */
read_only = rbd_dev->opts->read_only;
if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
read_only = true;
rbd_dev->mapping.read_only = read_only;
rbd_dev->opts->read_only = true;
rc = rbd_dev_device_setup(rbd_dev);
if (rc)