#include <linux/in.h> #include "ioctl.h" #include "super.h" #include "ceph_debug.h" /* * ioctls */ /* * get and set the file layout */ static long ceph_ioctl_get_layout(struct file *file, void __user *arg) { struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode); struct ceph_ioctl_layout l; int err; err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT); if (!err) { l.stripe_unit = ceph_file_layout_su(ci->i_layout); l.stripe_count = ceph_file_layout_stripe_count(ci->i_layout); l.object_size = ceph_file_layout_object_size(ci->i_layout); l.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool); l.preferred_osd = (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred); if (copy_to_user(arg, &l, sizeof(l))) return -EFAULT; } return err; } static long ceph_ioctl_set_layout(struct file *file, void __user *arg) { struct inode *inode = file->f_dentry->d_inode; struct inode *parent_inode = file->f_dentry->d_parent->d_inode; struct ceph_mds_client *mdsc = &ceph_sb_to_client(inode->i_sb)->mdsc; struct ceph_mds_request *req; struct ceph_ioctl_layout l; int err, i; /* 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; } req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT, USE_AUTH_MDS); if (IS_ERR(req)) return PTR_ERR(req); req->r_inode = igrab(inode); req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL; req->r_args.setlayout.layout.fl_stripe_unit = cpu_to_le32(l.stripe_unit); req->r_args.setlayout.layout.fl_stripe_count = cpu_to_le32(l.stripe_count); req->r_args.setlayout.layout.fl_object_size = cpu_to_le32(l.object_size); req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool); req->r_args.setlayout.layout.fl_pg_preferred = cpu_to_le32(l.preferred_osd); err = ceph_mdsc_do_request(mdsc, parent_inode, req); ceph_mdsc_put_request(req); return err; } /* * Return object name, size/offset information, and location (OSD * number, network address) for a given file offset. */ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) { struct ceph_ioctl_dataloc dl; struct inode *inode = file->f_dentry->d_inode; struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_osd_client *osdc = &ceph_sb_to_client(inode->i_sb)->osdc; u64 len = 1, olen; u64 tmp; struct ceph_object_layout ol; struct ceph_pg pgid; /* copy and validate */ if (copy_from_user(&dl, arg, sizeof(dl))) return -EFAULT; down_read(&osdc->map_sem); ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, &len, &dl.object_no, &dl.object_offset, &olen); dl.file_offset -= dl.object_offset; dl.object_size = ceph_file_layout_object_size(ci->i_layout); dl.block_size = ceph_file_layout_su(ci->i_layout); /* block_offset = object_offset % block_size */ tmp = dl.object_offset; dl.block_offset = do_div(tmp, dl.block_size); snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", ceph_ino(inode), dl.object_no); ceph_calc_object_layout(&ol, dl.object_name, &ci->i_layout, osdc->osdmap); pgid = ol.ol_pgid; dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid); if (dl.osd >= 0) { struct ceph_entity_addr *a = ceph_osd_addr(osdc->osdmap, dl.osd); if (a) memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); } else { memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); } up_read(&osdc->map_sem); /* send result back to user */ if (copy_to_user(arg, &dl, sizeof(dl))) return -EFAULT; return 0; } long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); switch (cmd) { case CEPH_IOC_GET_LAYOUT: return ceph_ioctl_get_layout(file, (void __user *)arg); case CEPH_IOC_SET_LAYOUT: return ceph_ioctl_set_layout(file, (void __user *)arg); case CEPH_IOC_GET_DATALOC: return ceph_ioctl_get_dataloc(file, (void __user *)arg); } return -ENOTTY; }