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1// SPDX-License-Identifier: GPL-2.02#include <linux/ceph/ceph_debug.h>3#include <linux/in.h>4 5#include "super.h"6#include "mds_client.h"7#include "ioctl.h"8#include <linux/ceph/striper.h>9#include <linux/fscrypt.h>10 11/*12 * ioctls13 */14 15/*16 * get and set the file layout17 */18static long ceph_ioctl_get_layout(struct file *file, void __user *arg)19{20 struct ceph_inode_info *ci = ceph_inode(file_inode(file));21 struct ceph_ioctl_layout l;22 int err;23 24 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);25 if (!err) {26 l.stripe_unit = ci->i_layout.stripe_unit;27 l.stripe_count = ci->i_layout.stripe_count;28 l.object_size = ci->i_layout.object_size;29 l.data_pool = ci->i_layout.pool_id;30 l.preferred_osd = -1;31 if (copy_to_user(arg, &l, sizeof(l)))32 return -EFAULT;33 }34 35 return err;36}37 38static long __validate_layout(struct ceph_mds_client *mdsc,39 struct ceph_ioctl_layout *l)40{41 int i, err;42 43 /* validate striping parameters */44 if ((l->object_size & ~PAGE_MASK) ||45 (l->stripe_unit & ~PAGE_MASK) ||46 ((unsigned)l->stripe_unit != 0 &&47 ((unsigned)l->object_size % (unsigned)l->stripe_unit)))48 return -EINVAL;49 50 /* make sure it's a valid data pool */51 mutex_lock(&mdsc->mutex);52 err = -EINVAL;53 for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)54 if (mdsc->mdsmap->m_data_pg_pools[i] == l->data_pool) {55 err = 0;56 break;57 }58 mutex_unlock(&mdsc->mutex);59 if (err)60 return err;61 62 return 0;63}64 65static long ceph_ioctl_set_layout(struct file *file, void __user *arg)66{67 struct inode *inode = file_inode(file);68 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc;69 struct ceph_mds_request *req;70 struct ceph_ioctl_layout l;71 struct ceph_inode_info *ci = ceph_inode(file_inode(file));72 struct ceph_ioctl_layout nl;73 int err;74 75 if (copy_from_user(&l, arg, sizeof(l)))76 return -EFAULT;77 78 /* validate changed params against current layout */79 err = ceph_do_getattr(file_inode(file), CEPH_STAT_CAP_LAYOUT, false);80 if (err)81 return err;82 83 memset(&nl, 0, sizeof(nl));84 if (l.stripe_count)85 nl.stripe_count = l.stripe_count;86 else87 nl.stripe_count = ci->i_layout.stripe_count;88 if (l.stripe_unit)89 nl.stripe_unit = l.stripe_unit;90 else91 nl.stripe_unit = ci->i_layout.stripe_unit;92 if (l.object_size)93 nl.object_size = l.object_size;94 else95 nl.object_size = ci->i_layout.object_size;96 if (l.data_pool)97 nl.data_pool = l.data_pool;98 else99 nl.data_pool = ci->i_layout.pool_id;100 101 /* this is obsolete, and always -1 */102 nl.preferred_osd = -1;103 104 err = __validate_layout(mdsc, &nl);105 if (err)106 return err;107 108 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,109 USE_AUTH_MDS);110 if (IS_ERR(req))111 return PTR_ERR(req);112 req->r_inode = inode;113 ihold(inode);114 req->r_num_caps = 1;115 116 req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;117 118 req->r_args.setlayout.layout.fl_stripe_unit =119 cpu_to_le32(l.stripe_unit);120 req->r_args.setlayout.layout.fl_stripe_count =121 cpu_to_le32(l.stripe_count);122 req->r_args.setlayout.layout.fl_object_size =123 cpu_to_le32(l.object_size);124 req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);125 126 err = ceph_mdsc_do_request(mdsc, NULL, req);127 ceph_mdsc_put_request(req);128 return err;129}130 131/*132 * Set a layout policy on a directory inode. All items in the tree133 * rooted at this inode will inherit this layout on creation,134 * (It doesn't apply retroactively )135 * unless a subdirectory has its own layout policy.136 */137static long ceph_ioctl_set_layout_policy (struct file *file, void __user *arg)138{139 struct inode *inode = file_inode(file);140 struct ceph_mds_request *req;141 struct ceph_ioctl_layout l;142 int err;143 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc;144 145 /* copy and validate */146 if (copy_from_user(&l, arg, sizeof(l)))147 return -EFAULT;148 149 err = __validate_layout(mdsc, &l);150 if (err)151 return err;152 153 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETDIRLAYOUT,154 USE_AUTH_MDS);155 156 if (IS_ERR(req))157 return PTR_ERR(req);158 req->r_inode = inode;159 ihold(inode);160 req->r_num_caps = 1;161 162 req->r_args.setlayout.layout.fl_stripe_unit =163 cpu_to_le32(l.stripe_unit);164 req->r_args.setlayout.layout.fl_stripe_count =165 cpu_to_le32(l.stripe_count);166 req->r_args.setlayout.layout.fl_object_size =167 cpu_to_le32(l.object_size);168 req->r_args.setlayout.layout.fl_pg_pool =169 cpu_to_le32(l.data_pool);170 171 err = ceph_mdsc_do_request(mdsc, inode, req);172 ceph_mdsc_put_request(req);173 return err;174}175 176/*177 * Return object name, size/offset information, and location (OSD178 * number, network address) for a given file offset.179 */180static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)181{182 struct ceph_ioctl_dataloc dl;183 struct inode *inode = file_inode(file);184 struct ceph_inode_info *ci = ceph_inode(inode);185 struct ceph_osd_client *osdc =186 &ceph_sb_to_fs_client(inode->i_sb)->client->osdc;187 struct ceph_object_locator oloc;188 CEPH_DEFINE_OID_ONSTACK(oid);189 u32 xlen;190 u64 tmp;191 struct ceph_pg pgid;192 int r;193 194 /* copy and validate */195 if (copy_from_user(&dl, arg, sizeof(dl)))196 return -EFAULT;197 198 down_read(&osdc->lock);199 ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1,200 &dl.object_no, &dl.object_offset, &xlen);201 dl.file_offset -= dl.object_offset;202 dl.object_size = ci->i_layout.object_size;203 dl.block_size = ci->i_layout.stripe_unit;204 205 /* block_offset = object_offset % block_size */206 tmp = dl.object_offset;207 dl.block_offset = do_div(tmp, dl.block_size);208 209 snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",210 ceph_ino(inode), dl.object_no);211 212 oloc.pool = ci->i_layout.pool_id;213 oloc.pool_ns = ceph_try_get_string(ci->i_layout.pool_ns);214 ceph_oid_printf(&oid, "%s", dl.object_name);215 216 r = ceph_object_locator_to_pg(osdc->osdmap, &oid, &oloc, &pgid);217 218 ceph_oloc_destroy(&oloc);219 if (r < 0) {220 up_read(&osdc->lock);221 return r;222 }223 224 dl.osd = ceph_pg_to_acting_primary(osdc->osdmap, &pgid);225 if (dl.osd >= 0) {226 struct ceph_entity_addr *a =227 ceph_osd_addr(osdc->osdmap, dl.osd);228 if (a)229 memcpy(&dl.osd_addr, &a->in_addr, sizeof(dl.osd_addr));230 } else {231 memset(&dl.osd_addr, 0, sizeof(dl.osd_addr));232 }233 up_read(&osdc->lock);234 235 /* send result back to user */236 if (copy_to_user(arg, &dl, sizeof(dl)))237 return -EFAULT;238 239 return 0;240}241 242static long ceph_ioctl_lazyio(struct file *file)243{244 struct ceph_file_info *fi = file->private_data;245 struct inode *inode = file_inode(file);246 struct ceph_inode_info *ci = ceph_inode(inode);247 struct ceph_mds_client *mdsc = ceph_inode_to_fs_client(inode)->mdsc;248 struct ceph_client *cl = mdsc->fsc->client;249 250 if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {251 spin_lock(&ci->i_ceph_lock);252 fi->fmode |= CEPH_FILE_MODE_LAZY;253 ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++;254 __ceph_touch_fmode(ci, mdsc, fi->fmode);255 spin_unlock(&ci->i_ceph_lock);256 doutc(cl, "file %p %p %llx.%llx marked lazy\n", file, inode,257 ceph_vinop(inode));258 259 ceph_check_caps(ci, 0);260 } else {261 doutc(cl, "file %p %p %llx.%llx already lazy\n", file, inode,262 ceph_vinop(inode));263 }264 return 0;265}266 267static long ceph_ioctl_syncio(struct file *file)268{269 struct ceph_file_info *fi = file->private_data;270 271 fi->flags |= CEPH_F_SYNC;272 return 0;273}274 275static int vet_mds_for_fscrypt(struct file *file)276{277 int i, ret = -EOPNOTSUPP;278 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(file_inode(file)->i_sb);279 280 mutex_lock(&mdsc->mutex);281 for (i = 0; i < mdsc->max_sessions; i++) {282 struct ceph_mds_session *s = mdsc->sessions[i];283 284 if (!s)285 continue;286 if (test_bit(CEPHFS_FEATURE_ALTERNATE_NAME, &s->s_features))287 ret = 0;288 break;289 }290 mutex_unlock(&mdsc->mutex);291 return ret;292}293 294static long ceph_set_encryption_policy(struct file *file, unsigned long arg)295{296 int ret, got = 0;297 struct inode *inode = file_inode(file);298 struct ceph_inode_info *ci = ceph_inode(inode);299 300 /* encrypted directories can't have striped layout */301 if (ci->i_layout.stripe_count > 1)302 return -EINVAL;303 304 ret = vet_mds_for_fscrypt(file);305 if (ret)306 return ret;307 308 /*309 * Ensure we hold these caps so that we _know_ that the rstats check310 * in the empty_dir check is reliable.311 */312 ret = ceph_get_caps(file, CEPH_CAP_FILE_SHARED, 0, -1, &got);313 if (ret)314 return ret;315 316 ret = fscrypt_ioctl_set_policy(file, (const void __user *)arg);317 if (got)318 ceph_put_cap_refs(ci, got);319 320 return ret;321}322 323static const char *ceph_ioctl_cmd_name(const unsigned int cmd)324{325 switch (cmd) {326 case CEPH_IOC_GET_LAYOUT:327 return "get_layout";328 case CEPH_IOC_SET_LAYOUT:329 return "set_layout";330 case CEPH_IOC_SET_LAYOUT_POLICY:331 return "set_layout_policy";332 case CEPH_IOC_GET_DATALOC:333 return "get_dataloc";334 case CEPH_IOC_LAZYIO:335 return "lazyio";336 case CEPH_IOC_SYNCIO:337 return "syncio";338 case FS_IOC_SET_ENCRYPTION_POLICY:339 return "set_encryption_policy";340 case FS_IOC_GET_ENCRYPTION_POLICY:341 return "get_encryption_policy";342 case FS_IOC_GET_ENCRYPTION_POLICY_EX:343 return "get_encryption_policy_ex";344 case FS_IOC_ADD_ENCRYPTION_KEY:345 return "add_encryption_key";346 case FS_IOC_REMOVE_ENCRYPTION_KEY:347 return "remove_encryption_key";348 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:349 return "remove_encryption_key_all_users";350 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:351 return "get_encryption_key_status";352 case FS_IOC_GET_ENCRYPTION_NONCE:353 return "get_encryption_nonce";354 default:355 return "unknown";356 }357}358 359long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg)360{361 struct inode *inode = file_inode(file);362 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);363 int ret;364 365 doutc(fsc->client, "file %p %p %llx.%llx cmd %s arg %lu\n", file,366 inode, ceph_vinop(inode), ceph_ioctl_cmd_name(cmd), arg);367 switch (cmd) {368 case CEPH_IOC_GET_LAYOUT:369 return ceph_ioctl_get_layout(file, (void __user *)arg);370 371 case CEPH_IOC_SET_LAYOUT:372 return ceph_ioctl_set_layout(file, (void __user *)arg);373 374 case CEPH_IOC_SET_LAYOUT_POLICY:375 return ceph_ioctl_set_layout_policy(file, (void __user *)arg);376 377 case CEPH_IOC_GET_DATALOC:378 return ceph_ioctl_get_dataloc(file, (void __user *)arg);379 380 case CEPH_IOC_LAZYIO:381 return ceph_ioctl_lazyio(file);382 383 case CEPH_IOC_SYNCIO:384 return ceph_ioctl_syncio(file);385 386 case FS_IOC_SET_ENCRYPTION_POLICY:387 return ceph_set_encryption_policy(file, arg);388 389 case FS_IOC_GET_ENCRYPTION_POLICY:390 ret = vet_mds_for_fscrypt(file);391 if (ret)392 return ret;393 return fscrypt_ioctl_get_policy(file, (void __user *)arg);394 395 case FS_IOC_GET_ENCRYPTION_POLICY_EX:396 ret = vet_mds_for_fscrypt(file);397 if (ret)398 return ret;399 return fscrypt_ioctl_get_policy_ex(file, (void __user *)arg);400 401 case FS_IOC_ADD_ENCRYPTION_KEY:402 ret = vet_mds_for_fscrypt(file);403 if (ret)404 return ret;405 return fscrypt_ioctl_add_key(file, (void __user *)arg);406 407 case FS_IOC_REMOVE_ENCRYPTION_KEY:408 return fscrypt_ioctl_remove_key(file, (void __user *)arg);409 410 case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS:411 return fscrypt_ioctl_remove_key_all_users(file,412 (void __user *)arg);413 414 case FS_IOC_GET_ENCRYPTION_KEY_STATUS:415 return fscrypt_ioctl_get_key_status(file, (void __user *)arg);416 417 case FS_IOC_GET_ENCRYPTION_NONCE:418 ret = vet_mds_for_fscrypt(file);419 if (ret)420 return ret;421 return fscrypt_ioctl_get_nonce(file, (void __user *)arg);422 }423 424 return -ENOTTY;425}426