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ceph: refactor SETLAYOUT and SETDIRLAYOUT ioctl checks into common helper 

Both of these methods perform similar checks; move that code to a helper
so that we can ensure the checks are consistent.

Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Sage Weil 2012-05-07 15:34:35 -07:00
parent 3469ac1aa3
commit e49bf4c51c
1 changed files with 38 additions and 44 deletions
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82
fs/ceph/ioctl.c
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@ -34,6 +34,36 @@ static long ceph_ioctl_get_layout(struct file *file, void __user *arg)
return err;
}
static long __validate_layout(struct ceph_mds_client *mdsc,
struct ceph_ioctl_layout *l)
{
int i, err;
/* preferred_osd is no longer supported */
if (l->preferred_osd != -1)
return -EINVAL;
/* validate striping parameters */
if ((l->object_size & ~PAGE_MASK) ||
(l->stripe_unit & ~PAGE_MASK) ||
((unsigned)l->object_size % (unsigned)l->stripe_unit))
return -EINVAL;
/* make sure it's a valid data pool */
mutex_lock(&mdsc->mutex);
err = -EINVAL;
for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {
err = 0;
break;
}
mutex_unlock(&mdsc->mutex);
if (err)
return err;
return 0;
}
static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
{
struct inode *inode = file->f_dentry->d_inode;
@ -43,15 +73,11 @@ static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
struct ceph_ioctl_layout l;
struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
struct ceph_ioctl_layout nl;
int err, i;
int err;
if (copy_from_user(&l, arg, sizeof(l)))
return -EFAULT;
/* preferred_osd is no longer supported */
if (l.preferred_osd != -1)
return -EINVAL;
/* validate changed params against current layout */
err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
if (!err) {
@ -71,24 +97,9 @@ static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
if (l.data_pool)
nl.data_pool = l.data_pool;
if ((nl.object_size & ~PAGE_MASK) ||
(nl.stripe_unit & ~PAGE_MASK) ||
((unsigned)nl.object_size % (unsigned)nl.stripe_unit))
return -EINVAL;
/* make sure it's a valid data pool */
if (l.data_pool > 0) {
mutex_lock(&mdsc->mutex);
err = -EINVAL;
for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
err = 0;
break;
}
mutex_unlock(&mdsc->mutex);
if (err)
return err;
}
err = __validate_layout(mdsc, &nl);
if (err)
return err;
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
USE_AUTH_MDS);
@ -124,33 +135,16 @@ static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
struct inode *inode = file->f_dentry->d_inode;
struct ceph_mds_request *req;
struct ceph_ioctl_layout l;
int err, i;
int err;
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
/* copy and validate */
if (copy_from_user(&l, arg, sizeof(l)))
return -EFAULT;
if ((l.object_size & ~PAGE_MASK) ||
(l.stripe_unit & ~PAGE_MASK) ||
!l.stripe_unit ||
(l.object_size &&
(unsigned)l.object_size % (unsigned)l.stripe_unit))
return -EINVAL;
/* make sure it's a valid data pool */
if (l.data_pool > 0) {
mutex_lock(&mdsc->mutex);
err = -EINVAL;
for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
err = 0;
break;
}
mutex_unlock(&mdsc->mutex);
if (err)
return err;
}
err = __validate_layout(mdsc, &l);
if (err)
return err;
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
USE_AUTH_MDS);