#include <linux/ceph/ceph_debug.h> #include <linux/in.h> #include "super.h" #include "mds_client.h" #include "ioctl.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_inode(file)); struct ceph_ioctl_layout l; int err; err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false); 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)-1; if (copy_to_user(arg, &l, sizeof(l))) return -EFAULT; } return err; } static long __validate_layout(struct ceph_mds_client *mdsc, struct ceph_ioctl_layout *l) { int i, err; /* validate striping parameters */ if ((l->object_size & ~PAGE_MASK) || (l->stripe_unit & ~PAGE_MASK) || ((unsigned)l->stripe_unit != 0 && ((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_inode(file); struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; struct ceph_mds_request *req; struct ceph_ioctl_layout l; struct ceph_inode_info *ci = ceph_inode(file_inode(file)); struct ceph_ioctl_layout nl; int err; if (copy_from_user(&l, arg, sizeof(l))) return -EFAULT; /* validate changed params against current layout */ err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false); if (err) return err; memset(&nl, 0, sizeof(nl)); if (l.stripe_count) nl.stripe_count = l.stripe_count; else nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout); if (l.stripe_unit) nl.stripe_unit = l.stripe_unit; else nl.stripe_unit = ceph_file_layout_su(ci->i_layout); if (l.object_size) nl.object_size = l.object_size; else nl.object_size = ceph_file_layout_object_size(ci->i_layout); if (l.data_pool) nl.data_pool = l.data_pool; else nl.data_pool = ceph_file_layout_pg_pool(ci->i_layout); /* this is obsolete, and always -1 */ nl.preferred_osd = le64_to_cpu(-1); err = __validate_layout(mdsc, &nl); if (err) return err; req = ceph_mdsc_create_request(mdsc,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 = inode; ihold(inode); req->r_num_caps = 1; 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); err = ceph_mdsc_do_request(mdsc, NULL, req); ceph_mdsc_put_request(req); return err; } /* * Set a layout policy on a directory inode. All items in the tree * rooted at this inode will inherit this layout on creation, * (It doesn't apply retroactively ) * unless a subdirectory has its own layout policy. */ static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg) { struct inode *inode = file_inode(file); struct ceph_mds_request *req; struct ceph_ioctl_layout l; 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; err = __validate_layout(mdsc, &l); if (err) return err; req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT, USE_AUTH_MDS); if (IS_ERR(req)) return PTR_ERR(req); req->r_inode = inode; ihold(inode); req->r_num_caps = 1; 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); err = ceph_mdsc_do_request(mdsc, 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_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_osd_client *osdc = &ceph_sb_to_client(inode->i_sb)->client->osdc; struct ceph_object_locator oloc; struct ceph_object_id oid; u64 len = 1, olen; u64 tmp; struct ceph_pg pgid; int r; /* copy and validate */ if (copy_from_user(&dl, arg, sizeof(dl))) return -EFAULT; down_read(&osdc->map_sem); r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len, &dl.object_no, &dl.object_offset, &olen); if (r < 0) { up_read(&osdc->map_sem); return -EIO; } 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); oloc.pool = ceph_file_layout_pg_pool(ci->i_layout); ceph_oid_set_name(&oid, dl.object_name); r = ceph_oloc_oid_to_pg(osdc->osdmap, &oloc, &oid, &pgid); if (r < 0) { up_read(&osdc->map_sem); return r; } 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; } static long ceph_ioctl_lazyio(struct file *file) { struct ceph_file_info *fi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { spin_lock(&ci->i_ceph_lock); ci->i_nr_by_mode[fi->fmode]--; fi->fmode |= CEPH_FILE_MODE_LAZY; ci->i_nr_by_mode[fi->fmode]++; spin_unlock(&ci->i_ceph_lock); dout("ioctl_layzio: file %p marked lazy\n", file); ceph_check_caps(ci, 0, NULL); } else { dout("ioctl_layzio: file %p already lazy\n", file); } return 0; } static long ceph_ioctl_syncio(struct file *file) { struct ceph_file_info *fi = file->private_data; fi->flags |= CEPH_F_SYNC; 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_SET_LAYOUT_POLICY: return ceph_ioctl_set_layout_policy(file, (void __user *)arg); case CEPH_IOC_GET_DATALOC: return ceph_ioctl_get_dataloc(file, (void __user *)arg); case CEPH_IOC_LAZYIO: return ceph_ioctl_lazyio(file); case CEPH_IOC_SYNCIO: return ceph_ioctl_syncio(file); } return -ENOTTY; }