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295 lines
7.5 KiB
295 lines
7.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/ceph/ceph_debug.h> |
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#include <linux/in.h> |
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#include "super.h" |
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#include "mds_client.h" |
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#include "ioctl.h" |
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#include <linux/ceph/striper.h> |
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/* |
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* ioctls |
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*/ |
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/* |
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* get and set the file layout |
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*/ |
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static long ceph_ioctl_get_layout(struct file *file, void __user *arg) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(file_inode(file)); |
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struct ceph_ioctl_layout l; |
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int err; |
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err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false); |
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if (!err) { |
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l.stripe_unit = ci->i_layout.stripe_unit; |
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l.stripe_count = ci->i_layout.stripe_count; |
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l.object_size = ci->i_layout.object_size; |
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l.data_pool = ci->i_layout.pool_id; |
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l.preferred_osd = -1; |
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if (copy_to_user(arg, &l, sizeof(l))) |
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return -EFAULT; |
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} |
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return err; |
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} |
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static long __validate_layout(struct ceph_mds_client *mdsc, |
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struct ceph_ioctl_layout *l) |
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{ |
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int i, err; |
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/* validate striping parameters */ |
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if ((l->object_size & ~PAGE_MASK) || |
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(l->stripe_unit & ~PAGE_MASK) || |
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((unsigned)l->stripe_unit != 0 && |
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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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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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return 0; |
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} |
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static long ceph_ioctl_set_layout(struct file *file, void __user *arg) |
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{ |
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struct inode *inode = file_inode(file); |
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struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; |
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struct ceph_mds_request *req; |
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struct ceph_ioctl_layout l; |
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struct ceph_inode_info *ci = ceph_inode(file_inode(file)); |
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struct ceph_ioctl_layout nl; |
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int err; |
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if (copy_from_user(&l, arg, sizeof(l))) |
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return -EFAULT; |
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/* validate changed params against current layout */ |
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err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false); |
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if (err) |
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return err; |
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memset(&nl, 0, sizeof(nl)); |
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if (l.stripe_count) |
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nl.stripe_count = l.stripe_count; |
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else |
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nl.stripe_count = ci->i_layout.stripe_count; |
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if (l.stripe_unit) |
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nl.stripe_unit = l.stripe_unit; |
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else |
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nl.stripe_unit = ci->i_layout.stripe_unit; |
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if (l.object_size) |
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nl.object_size = l.object_size; |
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else |
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nl.object_size = ci->i_layout.object_size; |
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if (l.data_pool) |
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nl.data_pool = l.data_pool; |
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else |
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nl.data_pool = ci->i_layout.pool_id; |
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/* this is obsolete, and always -1 */ |
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nl.preferred_osd = -1; |
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err = __validate_layout(mdsc, &nl); |
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if (err) |
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return err; |
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req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT, |
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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 = inode; |
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ihold(inode); |
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req->r_num_caps = 1; |
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req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL; |
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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 = cpu_to_le32(l.data_pool); |
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err = ceph_mdsc_do_request(mdsc, NULL, 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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* 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_inode(file); |
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struct ceph_mds_request *req; |
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struct ceph_ioctl_layout l; |
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int err; |
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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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err = __validate_layout(mdsc, &l); |
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if (err) |
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return err; |
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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 = inode; |
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ihold(inode); |
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req->r_num_caps = 1; |
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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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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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static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) |
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{ |
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struct ceph_ioctl_dataloc dl; |
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struct inode *inode = file_inode(file); |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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struct ceph_osd_client *osdc = |
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&ceph_sb_to_client(inode->i_sb)->client->osdc; |
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struct ceph_object_locator oloc; |
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CEPH_DEFINE_OID_ONSTACK(oid); |
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u32 xlen; |
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u64 tmp; |
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struct ceph_pg pgid; |
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int r; |
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/* copy and validate */ |
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if (copy_from_user(&dl, arg, sizeof(dl))) |
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return -EFAULT; |
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down_read(&osdc->lock); |
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ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1, |
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&dl.object_no, &dl.object_offset, &xlen); |
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dl.file_offset -= dl.object_offset; |
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dl.object_size = ci->i_layout.object_size; |
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dl.block_size = ci->i_layout.stripe_unit; |
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/* block_offset = object_offset % block_size */ |
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tmp = dl.object_offset; |
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dl.block_offset = do_div(tmp, dl.block_size); |
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snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx", |
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ceph_ino(inode), dl.object_no); |
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oloc.pool = ci->i_layout.pool_id; |
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oloc.pool_ns = ceph_try_get_string(ci->i_layout.pool_ns); |
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ceph_oid_printf(&oid, "%s", dl.object_name); |
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r = ceph_object_locator_to_pg(osdc->osdmap, &oid, &oloc, &pgid); |
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ceph_oloc_destroy(&oloc); |
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if (r < 0) { |
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up_read(&osdc->lock); |
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return r; |
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} |
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dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid); |
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if (dl.osd >= 0) { |
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struct ceph_entity_addr *a = |
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ceph_osd_addr(osdc->osdmap, dl.osd); |
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if (a) |
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memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr)); |
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} else { |
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memset(&dl.osd_addr, 0, sizeof(dl.osd_addr)); |
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} |
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up_read(&osdc->lock); |
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/* send result back to user */ |
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if (copy_to_user(arg, &dl, sizeof(dl))) |
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return -EFAULT; |
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return 0; |
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} |
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static long ceph_ioctl_lazyio(struct file *file) |
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{ |
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struct ceph_file_info *fi = file->private_data; |
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struct inode *inode = file_inode(file); |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; |
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if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { |
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spin_lock(&ci->i_ceph_lock); |
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fi->fmode |= CEPH_FILE_MODE_LAZY; |
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ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++; |
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__ceph_touch_fmode(ci, mdsc, fi->fmode); |
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spin_unlock(&ci->i_ceph_lock); |
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dout("ioctl_layzio: file %p marked lazy\n", file); |
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ceph_check_caps(ci, 0, NULL); |
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} else { |
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dout("ioctl_layzio: file %p already lazy\n", file); |
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} |
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return 0; |
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} |
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static long ceph_ioctl_syncio(struct file *file) |
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{ |
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struct ceph_file_info *fi = file->private_data; |
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fi->flags |= CEPH_F_SYNC; |
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return 0; |
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} |
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long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
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{ |
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dout("ioctl file %p cmd %u arg %lu\n", file, cmd, arg); |
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switch (cmd) { |
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case CEPH_IOC_GET_LAYOUT: |
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return ceph_ioctl_get_layout(file, (void __user *)arg); |
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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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case CEPH_IOC_SYNCIO: |
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return ceph_ioctl_syncio(file); |
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} |
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return -ENOTTY; |
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}
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