Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
ceph: add CEPH_MDS_OP_SETDIRLAYOUT and associated ioctl.
Signed-off-by: Sage Weil <sage@newdream.net>
authored by Greg Farnum and committed by Sage Weil 571dba52 010e3b48
+66
fs/ceph/ioctl.c
+66
fs/ceph/ioctl.c
···
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}
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/*
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* Set a layout policy on a directory inode. All items in the tree
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* rooted at this inode will inherit this layout on creation,
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* (It doesn't apply retroactively )
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* unless a subdirectory has its own layout policy.
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*/
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static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)
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{
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struct inode *inode = file->f_dentry->d_inode;
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struct ceph_mds_request *req;
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struct ceph_ioctl_layout l;
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int err, i;
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struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
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/* copy and validate */
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if (copy_from_user(&l, arg, sizeof(l)))
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return -EFAULT;
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if ((l.object_size & ~PAGE_MASK) ||
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(l.stripe_unit & ~PAGE_MASK) ||
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!l.stripe_unit ||
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(l.object_size &&
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(unsigned)l.object_size % (unsigned)l.stripe_unit))
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return -EINVAL;
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/* make sure it's a valid data pool */
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if (l.data_pool > 0) {
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mutex_lock(&mdsc->mutex);
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err = -EINVAL;
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for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
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if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
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err = 0;
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break;
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}
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mutex_unlock(&mdsc->mutex);
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if (err)
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return err;
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}
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req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,
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USE_AUTH_MDS);
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if (IS_ERR(req))
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return PTR_ERR(req);
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req->r_inode = igrab(inode);
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req->r_args.setlayout.layout.fl_stripe_unit =
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cpu_to_le32(l.stripe_unit);
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req->r_args.setlayout.layout.fl_stripe_count =
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cpu_to_le32(l.stripe_count);
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req->r_args.setlayout.layout.fl_object_size =
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cpu_to_le32(l.object_size);
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req->r_args.setlayout.layout.fl_pg_pool =
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cpu_to_le32(l.data_pool);
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req->r_args.setlayout.layout.fl_pg_preferred =
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cpu_to_le32(l.preferred_osd);
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err = ceph_mdsc_do_request(mdsc, inode, req);
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ceph_mdsc_put_request(req);
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return err;
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}
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/*
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* Return object name, size/offset information, and location (OSD
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* number, network address) for a given file offset.
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*/
···
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case CEPH_IOC_SET_LAYOUT:
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return ceph_ioctl_set_layout(file, (void __user *)arg);
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case CEPH_IOC_SET_LAYOUT_POLICY:
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return ceph_ioctl_set_layout_policy(file, (void __user *)arg);
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case CEPH_IOC_GET_DATALOC:
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return ceph_ioctl_get_dataloc(file, (void __user *)arg);
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case CEPH_IOC_LAZYIO:
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return ceph_ioctl_lazyio(file);
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}
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return -ENOTTY;
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}
+3
-1
fs/ceph/ioctl.h
+3
-1
fs/ceph/ioctl.h
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#include <linux/ioctl.h>
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#include <linux/types.h>
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-
#define CEPH_IOCTL_MAGIC 0x97
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#define CEPH_IOCTL_MAGIC 0x98
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/* just use u64 to align sanely on all archs */
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struct ceph_ioctl_layout {
···
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#define CEPH_IOC_GET_LAYOUT _IOR(CEPH_IOCTL_MAGIC, 1, \
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struct ceph_ioctl_layout)
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#define CEPH_IOC_SET_LAYOUT _IOW(CEPH_IOCTL_MAGIC, 2, \
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struct ceph_ioctl_layout)
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#define CEPH_IOC_SET_LAYOUT_POLICY _IOW(CEPH_IOCTL_MAGIC, 5, \
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struct ceph_ioctl_layout)
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/*