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94af047092
Add the appropriate calls into fscrypt for various actions, including link, rename, setattr, and the open codepaths. Disable fallocate for encrypted inodes -- hopefully, just for now. If we have an encrypted inode, then the client will need to re-encrypt the contents of the new object. Disable copy offload to or from encrypted inodes. Set i_blkbits to crypto block size for encrypted inodes -- some of the underlying infrastructure for fscrypt relies on i_blkbits being aligned to crypto blocksize. Report STATX_ATTR_ENCRYPTED on encrypted inodes. [ lhenriques: forbid encryption with striped layouts ] Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Xiubo Li <xiubli@redhat.com> Reviewed-and-tested-by: Luís Henriques <lhenriques@suse.de> Reviewed-by: Milind Changire <mchangir@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
421 lines
11 KiB
C
421 lines
11 KiB
C
// 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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#include <linux/fscrypt.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);
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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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static int vet_mds_for_fscrypt(struct file *file)
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{
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int i, ret = -EOPNOTSUPP;
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struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(file_inode(file)->i_sb);
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mutex_lock(&mdsc->mutex);
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for (i = 0; i < mdsc->max_sessions; i++) {
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struct ceph_mds_session *s = mdsc->sessions[i];
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if (!s)
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continue;
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if (test_bit(CEPHFS_FEATURE_ALTERNATE_NAME, &s->s_features))
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ret = 0;
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break;
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}
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mutex_unlock(&mdsc->mutex);
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return ret;
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}
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static long ceph_set_encryption_policy(struct file *file, unsigned long arg)
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{
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int ret, got = 0;
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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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/* encrypted directories can't have striped layout */
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if (ci->i_layout.stripe_count > 1)
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return -EINVAL;
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ret = vet_mds_for_fscrypt(file);
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if (ret)
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return ret;
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/*
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* Ensure we hold these caps so that we _know_ that the rstats check
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* in the empty_dir check is reliable.
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*/
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ret = ceph_get_caps(file, CEPH_CAP_FILE_SHARED, 0, -1, &got);
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if (ret)
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return ret;
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ret = fscrypt_ioctl_set_policy(file, (const void __user *)arg);
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if (got)
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ceph_put_cap_refs(ci, got);
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return ret;
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}
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static const char *ceph_ioctl_cmd_name(const unsigned int cmd)
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{
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switch (cmd) {
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case CEPH_IOC_GET_LAYOUT:
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return "get_layout";
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case CEPH_IOC_SET_LAYOUT:
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return "set_layout";
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case CEPH_IOC_SET_LAYOUT_POLICY:
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return "set_layout_policy";
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case CEPH_IOC_GET_DATALOC:
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return "get_dataloc";
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case CEPH_IOC_LAZYIO:
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return "lazyio";
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case CEPH_IOC_SYNCIO:
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return "syncio";
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case FS_IOC_SET_ENCRYPTION_POLICY:
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return "set_encryption_policy";
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case FS_IOC_GET_ENCRYPTION_POLICY:
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return "get_encryption_policy";
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case FS_IOC_GET_ENCRYPTION_POLICY_EX:
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return "get_encryption_policy_ex";
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case FS_IOC_ADD_ENCRYPTION_KEY:
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return "add_encryption_key";
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case FS_IOC_REMOVE_ENCRYPTION_KEY:
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return "remove_encryption_key";
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case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
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return "remove_encryption_key_all_users";
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case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
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return "get_encryption_key_status";
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case FS_IOC_GET_ENCRYPTION_NONCE:
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return "get_encryption_nonce";
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default:
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return "unknown";
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}
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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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int ret;
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dout("ioctl file %p cmd %s arg %lu\n", file,
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ceph_ioctl_cmd_name(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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case FS_IOC_SET_ENCRYPTION_POLICY:
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return ceph_set_encryption_policy(file, arg);
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case FS_IOC_GET_ENCRYPTION_POLICY:
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ret = vet_mds_for_fscrypt(file);
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if (ret)
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return ret;
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return fscrypt_ioctl_get_policy(file, (void __user *)arg);
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case FS_IOC_GET_ENCRYPTION_POLICY_EX:
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ret = vet_mds_for_fscrypt(file);
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if (ret)
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return ret;
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return fscrypt_ioctl_get_policy_ex(file, (void __user *)arg);
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case FS_IOC_ADD_ENCRYPTION_KEY:
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ret = vet_mds_for_fscrypt(file);
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if (ret)
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return ret;
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return fscrypt_ioctl_add_key(file, (void __user *)arg);
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case FS_IOC_REMOVE_ENCRYPTION_KEY:
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return fscrypt_ioctl_remove_key(file, (void __user *)arg);
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case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:
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return fscrypt_ioctl_remove_key_all_users(file,
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(void __user *)arg);
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case FS_IOC_GET_ENCRYPTION_KEY_STATUS:
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return fscrypt_ioctl_get_key_status(file, (void __user *)arg);
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case FS_IOC_GET_ENCRYPTION_NONCE:
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ret = vet_mds_for_fscrypt(file);
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if (ret)
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return ret;
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return fscrypt_ioctl_get_nonce(file, (void __user *)arg);
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}
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return -ENOTTY;
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}
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