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scst_vdisk: Add 'sync' sysfs attribute

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Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6531 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2015-10-06 01:07:31 +00:00
parent 6bf6dd8d1f
commit 530af782ed
3 changed files with 32 additions and 0 deletions
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scst/README
+3
View File
@@ -1156,6 +1156,9 @@ Each vdisk_fileio's device has the following attributes in
- write_through - contains status of write back caching of this virtual
device.
- sync - writing into this attribute causes the page cache contents to
be flushed to disk.
- read_only - contains read only status of this virtual device.
- o_direct - contains O_DIRECT status of this virtual device.
scst/README_in-tree
+3
View File
@@ -1011,6 +1011,9 @@ Each vdisk_fileio's device has the following attributes in
- write_through - contains status of write back caching of this virtual
device.
- sync - writing into this attribute causes the page cache contents to
be flushed to disk.
- read_only - contains read only status of this virtual device.
- o_direct - contains O_DIRECT status of this virtual device.
scst/src/dev_handlers/scst_vdisk.c
+26
View File
@@ -398,6 +398,8 @@ static ssize_t vdev_sysfs_filename_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf);
static ssize_t vdisk_sysfs_resync_size_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count);
static ssize_t vdisk_sysfs_sync_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count);
static ssize_t vdev_sysfs_t10_vend_id_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count);
static ssize_t vdev_sysfs_t10_vend_id_show(struct kobject *kobj,
@@ -483,6 +485,8 @@ static struct kobj_attribute vdisk_filename_attr =
__ATTR(filename, S_IRUGO, vdev_sysfs_filename_show, NULL);
static struct kobj_attribute vdisk_resync_size_attr =
__ATTR(resync_size, S_IWUSR, NULL, vdisk_sysfs_resync_size_store);
static struct kobj_attribute vdisk_sync_attr =
__ATTR(sync, S_IWUSR, NULL, vdisk_sysfs_sync_store);
static struct kobj_attribute vdev_t10_vend_id_attr =
__ATTR(t10_vend_id, S_IWUSR|S_IRUGO, vdev_sysfs_t10_vend_id_show,
vdev_sysfs_t10_vend_id_store);
@@ -537,6 +541,7 @@ static const struct attribute *vdisk_fileio_attrs[] = {
&vdisk_removable_attr.attr,
&vdisk_filename_attr.attr,
&vdisk_resync_size_attr.attr,
&vdisk_sync_attr.attr,
&vdev_t10_vend_id_attr.attr,
&vdev_vend_specific_id_attr.attr,
&vdev_prod_id_attr.attr,
@@ -563,6 +568,7 @@ static const struct attribute *vdisk_blockio_attrs[] = {
&vdisk_rotational_attr.attr,
&vdisk_filename_attr.attr,
&vdisk_resync_size_attr.attr,
&vdisk_sync_attr.attr,
&vdev_t10_vend_id_attr.attr,
&vdev_vend_specific_id_attr.attr,
&vdev_prod_id_attr.attr,
@@ -7350,6 +7356,26 @@ out:
return res;
}
static ssize_t vdisk_sysfs_sync_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct scst_device *dev =
container_of(kobj, struct scst_device, dev_kobj);
struct scst_vdisk_dev *virt_dev = dev->dh_priv;
int res;
if (virt_dev->nullio)
res = 0;
else if (virt_dev->blockio)
res = vdisk_blockio_flush(virt_dev->bdev, GFP_KERNEL, false,
NULL, false);
else
res = __vdisk_fsync_fileio(0, i_size_read(file_inode(virt_dev->fd)),
dev, NULL, virt_dev->fd);
return res ? : count;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
static int vdisk_create_bioset(struct scst_vdisk_dev *virt_dev)
{