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FreeBSD: Touch up comments in zvol_os

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Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #12934
This commit is contained in:
Ryan Moeller 2021-12-23 19:04:07 +00:00 committed by Brian Behlendorf
parent 020545a95d
commit 5a57d6f73b
1 changed files with 20 additions and 20 deletions
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40
module/os/freebsd/zfs/zvol_os.c
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@ -213,12 +213,12 @@ zvol_geom_open(struct g_provider *pp, int flag, int count)
if (!zpool_on_zvol && tsd_get(zfs_geom_probe_vdev_key) != NULL) {
/*
* if zfs_geom_probe_vdev_key is set, that means that zfs is
* If zfs_geom_probe_vdev_key is set, that means that zfs is
* attempting to probe geom providers while looking for a
* replacement for a missing VDEV. In this case, the
* spa_namespace_lock will not be held, but it is still illegal
* to use a zvol as a vdev. Deadlocks can result if another
* thread has spa_namespace_lock
* thread has spa_namespace_lock.
*/
return (SET_ERROR(EOPNOTSUPP));
}
@ -247,9 +247,9 @@ retry:
ASSERT3S(zv->zv_volmode, ==, ZFS_VOLMODE_GEOM);
/*
* make sure zvol is not suspended during first open
* Make sure zvol is not suspended during first open
* (hold zv_suspend_lock) and respect proper lock acquisition
* ordering - zv_suspend_lock before zv_state_lock
* ordering - zv_suspend_lock before zv_state_lock.
*/
if (zv->zv_open_count == 0) {
drop_suspend = B_TRUE;
@ -257,7 +257,7 @@ retry:
mutex_exit(&zv->zv_state_lock);
rw_enter(&zv->zv_suspend_lock, ZVOL_RW_READER);
mutex_enter(&zv->zv_state_lock);
/* check to see if zv_suspend_lock is needed */
/* Check to see if zv_suspend_lock is needed. */
if (zv->zv_open_count != 0) {
rw_exit(&zv->zv_suspend_lock);
drop_suspend = B_FALSE;
@ -366,9 +366,9 @@ zvol_geom_close(struct g_provider *pp, int flag, int count)
ASSERT3U(zv->zv_open_count, >, 0);
/*
* make sure zvol is not suspended during last close
* Make sure zvol is not suspended during last close
* (hold zv_suspend_lock) and respect proper lock acquisition
* ordering - zv_suspend_lock before zv_state_lock
* ordering - zv_suspend_lock before zv_state_lock.
*/
new_open_count = zv->zv_open_count - count;
if (new_open_count == 0) {
@ -376,7 +376,7 @@ zvol_geom_close(struct g_provider *pp, int flag, int count)
mutex_exit(&zv->zv_state_lock);
rw_enter(&zv->zv_suspend_lock, ZVOL_RW_READER);
mutex_enter(&zv->zv_state_lock);
/* check to see if zv_suspend_lock is needed */
/* Check to see if zv_suspend_lock is needed. */
new_open_count = zv->zv_open_count - count;
if (new_open_count != 0) {
rw_exit(&zv->zv_suspend_lock);
@ -707,7 +707,7 @@ zvol_geom_bio_strategy(struct bio *bp)
}
}
if (error) {
/* convert checksum errors into IO errors */
/* Convert checksum errors into IO errors. */
if (error == ECKSUM)
error = SET_ERROR(EIO);
break;
@ -785,13 +785,13 @@ zvol_cdev_read(struct cdev *dev, struct uio *uio_s, int ioflag)
while (zfs_uio_resid(&uio) > 0 && zfs_uio_offset(&uio) < volsize) {
uint64_t bytes = MIN(zfs_uio_resid(&uio), DMU_MAX_ACCESS >> 1);
/* don't read past the end */
/* Don't read past the end. */
if (bytes > volsize - zfs_uio_offset(&uio))
bytes = volsize - zfs_uio_offset(&uio);
error = dmu_read_uio_dnode(zv->zv_dn, &uio, bytes);
if (error) {
/* convert checksum errors into IO errors */
/* Convert checksum errors into IO errors. */
if (error == ECKSUM)
error = SET_ERROR(EIO);
break;
@ -838,7 +838,7 @@ zvol_cdev_write(struct cdev *dev, struct uio *uio_s, int ioflag)
uint64_t off = zfs_uio_offset(&uio);
dmu_tx_t *tx = dmu_tx_create(zv->zv_objset);
if (bytes > volsize - off) /* don't write past the end */
if (bytes > volsize - off) /* Don't write past the end. */
bytes = volsize - off;
dmu_tx_hold_write_by_dnode(tx, zv->zv_dn, off, bytes);
@ -896,9 +896,9 @@ retry:
ASSERT3S(zv->zv_volmode, ==, ZFS_VOLMODE_DEV);
/*
* make sure zvol is not suspended during first open
* Make sure zvol is not suspended during first open
* (hold zv_suspend_lock) and respect proper lock acquisition
* ordering - zv_suspend_lock before zv_state_lock
* ordering - zv_suspend_lock before zv_state_lock.
*/
if (zv->zv_open_count == 0) {
drop_suspend = B_TRUE;
@ -906,7 +906,7 @@ retry:
mutex_exit(&zv->zv_state_lock);
rw_enter(&zv->zv_suspend_lock, ZVOL_RW_READER);
mutex_enter(&zv->zv_state_lock);
/* check to see if zv_suspend_lock is needed */
/* Check to see if zv_suspend_lock is needed. */
if (zv->zv_open_count != 0) {
rw_exit(&zv->zv_suspend_lock);
drop_suspend = B_FALSE;
@ -1012,16 +1012,16 @@ zvol_cdev_close(struct cdev *dev, int flags, int fmt, struct thread *td)
*/
ASSERT3U(zv->zv_open_count, >, 0);
/*
* make sure zvol is not suspended during last close
* Make sure zvol is not suspended during last close
* (hold zv_suspend_lock) and respect proper lock acquisition
* ordering - zv_suspend_lock before zv_state_lock
* ordering - zv_suspend_lock before zv_state_lock.
*/
if (zv->zv_open_count == 1) {
if (!rw_tryenter(&zv->zv_suspend_lock, ZVOL_RW_READER)) {
mutex_exit(&zv->zv_state_lock);
rw_enter(&zv->zv_suspend_lock, ZVOL_RW_READER);
mutex_enter(&zv->zv_state_lock);
/* check to see if zv_suspend_lock is needed */
/* Check to see if zv_suspend_lock is needed. */
if (zv->zv_open_count != 1) {
rw_exit(&zv->zv_suspend_lock);
drop_suspend = B_FALSE;
@ -1216,7 +1216,7 @@ zvol_rename_minor(zvol_state_t *zv, const char *newname)
ASSERT(RW_LOCK_HELD(&zvol_state_lock));
ASSERT(MUTEX_HELD(&zv->zv_state_lock));
/* move to new hashtable entry */
/* Move to a new hashtable entry. */
zv->zv_hash = zvol_name_hash(zv->zv_name);
hlist_del(&zv->zv_hlink);
hlist_add_head(&zv->zv_hlink, ZVOL_HT_HEAD(zv->zv_hash));
@ -1346,7 +1346,7 @@ zvol_create_minor_impl(const char *name)
doi = kmem_alloc(sizeof (dmu_object_info_t), KM_SLEEP);
/* lie and say we're read-only */
/* Lie and say we're read-only. */
error = dmu_objset_own(name, DMU_OST_ZVOL, B_TRUE, B_TRUE, FTAG, &os);
if (error)
goto out_doi;