From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============7140469816346919751==" MIME-Version: 1.0 From: Dan Carpenter Subject: [kdave-btrfs-devel:misc-next 128/167] fs/btrfs/ioctl.c:2556 btrfs_search_path_in_tree_user() error: uninitialized symbol 'root'. Date: Sat, 08 Feb 2020 11:18:33 +0300 Message-ID: <20200208081832.GP24804@kadam> List-Id: To: kbuild@lists.01.org --===============7140469816346919751== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable tree: https://github.com/kdave/btrfs-devel.git misc-next head: 23ba1a90f0571d91b55bdfef7f06f380a74e8475 commit: b84c85bbf5fc9bce14edeb33768d0cc1d8bc91d5 [128/167] btrfs: hold a re= f on the root in btrfs_search_path_in_tree_user If you fix the issue, kindly add following tag Reported-by: kbuild test robot Reported-by: Dan Carpenter New smatch warnings: fs/btrfs/ioctl.c:2556 btrfs_search_path_in_tree_user() error: uninitialized= symbol 'root'. Old smatch warnings: fs/btrfs/ioctl.c:1566 btrfs_defrag_file() warn: should 'ret << 12' be a 64 = bit type? fs/btrfs/ioctl.c:3326 btrfs_extent_same() error: uninitialized symbol 'ret'. fs/btrfs/ioctl.c:3738 btrfs_clone() error: uninitialized symbol 'trans'. # https://github.com/kdave/btrfs-devel/commit/b84c85bbf5fc9bce14edeb33768d0= cc1d8bc91d5 git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git git remote update kdave-btrfs-devel git checkout b84c85bbf5fc9bce14edeb33768d0cc1d8bc91d5 vim +/root +2556 fs/btrfs/ioctl.c ac8e9819d71f907 Chris Mason 2010-02-28 2391 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2392 static int btrfs_search_p= ath_in_tree_user(struct inode *inode, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2393 struct btrfs_ioctl_in= o_lookup_user_args *args) 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2394 { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2395 struct btrfs_fs_info *fs= _info =3D BTRFS_I(inode)->root->fs_info; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2396 struct super_block *sb = =3D inode->i_sb; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2397 struct btrfs_key upper_l= imit =3D BTRFS_I(inode)->location; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2398 u64 treeid =3D BTRFS_I(i= node)->root->root_key.objectid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2399 u64 dirid =3D args->diri= d; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2400 unsigned long item_off; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2401 unsigned long item_len; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2402 struct btrfs_inode_ref *= iref; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2403 struct btrfs_root_ref *r= ref; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2404 struct btrfs_root *root; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2405 struct btrfs_path *path; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2406 struct btrfs_key key, ke= y2; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2407 struct extent_buffer *le= af; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2408 struct inode *temp_inode; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2409 char *ptr; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2410 int slot; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2411 int len; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2412 int total_len =3D 0; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2413 int ret; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2414 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2415 path =3D btrfs_alloc_pat= h(); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2416 if (!path) 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2417 return -ENOMEM; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2418 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2419 /* 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2420 * If the bottom subvolu= me does not exist directly under upper_limit, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2421 * construct the path in= from the bottom up. 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2422 */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2423 if (dirid !=3D upper_lim= it.objectid) { "root" not initialized on the =3D=3D path. 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2424 ptr =3D &args->path[BTR= FS_INO_LOOKUP_USER_PATH_MAX - 1]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2425 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2426 key.objectid =3D treeid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2427 key.type =3D BTRFS_ROOT= _ITEM_KEY; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2428 key.offset =3D (u64)-1; 5312026004a7157 Josef Bacik 2020-01-24 2429 root =3D btrfs_get_fs_r= oot(fs_info, &key, true); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2430 if (IS_ERR(root)) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2431 ret =3D PTR_ERR(root); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2432 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2433 } b84c85bbf5fc9bc Josef Bacik 2020-01-24 2434 if (!btrfs_grab_fs_root= (root)) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2435 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2436 goto out; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2437 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2438 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2439 key.objectid =3D dirid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2440 key.type =3D BTRFS_INOD= E_REF_KEY; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2441 key.offset =3D (u64)-1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2442 while (1) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2443 ret =3D btrfs_search_s= lot(NULL, root, &key, path, 0, 0); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2444 if (ret < 0) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2445 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2446 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2447 ret =3D btrfs_previou= s_item(root, path, dirid, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2448 BTRFS_INODE_REF_= KEY); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2449 if (ret < 0) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2450 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2451 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2452 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2453 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2454 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2455 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2456 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2457 leaf =3D path->nodes[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2458 slot =3D path->slots[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2459 btrfs_item_key_to_cpu(= leaf, &key, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2460 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2461 iref =3D btrfs_item_pt= r(leaf, slot, struct btrfs_inode_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2462 len =3D btrfs_inode_re= f_name_len(leaf, iref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2463 ptr -=3D len + 1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2464 total_len +=3D len + 1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2465 if (ptr < args->path) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2466 ret =3D -ENAMETOOLONG; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2467 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2468 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2469 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2470 *(ptr + len) =3D '/'; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2471 read_extent_buffer(lea= f, ptr, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2472 (unsigned long)(iref= + 1), len); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2473 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2474 /* Check the read+exec= permission of this directory */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2475 ret =3D btrfs_previous= _item(root, path, dirid, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2476 BTRFS_INODE_ITEM_= KEY); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2477 if (ret < 0) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2478 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2479 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2480 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2481 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2482 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2483 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2484 leaf =3D path->nodes[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2485 slot =3D path->slots[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2486 btrfs_item_key_to_cpu(= leaf, &key2, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2487 if (key2.objectid !=3D= dirid) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2488 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2489 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2490 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2491 = 4c66e0d4243bb88 David Sterba 2019-10-03 2492 temp_inode =3D btrfs_i= get(sb, &key2, root); 3ca57bd620639ee Misono Tomohiro 2018-06-04 2493 if (IS_ERR(temp_inode)= ) { 3ca57bd620639ee Misono Tomohiro 2018-06-04 2494 ret =3D PTR_ERR(temp_= inode); b84c85bbf5fc9bc Josef Bacik 2020-01-24 2495 goto out_put; 3ca57bd620639ee Misono Tomohiro 2018-06-04 2496 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2497 ret =3D inode_permissi= on(temp_inode, MAY_READ | MAY_EXEC); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2498 iput(temp_inode); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2499 if (ret) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2500 ret =3D -EACCES; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2501 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2502 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2503 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2504 if (key.offset =3D=3D = upper_limit.objectid) 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2505 break; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2506 if (key.objectid =3D= =3D BTRFS_FIRST_FREE_OBJECTID) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2507 ret =3D -EACCES; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2508 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2509 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2510 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2511 btrfs_release_path(pat= h); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2512 key.objectid =3D key.o= ffset; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2513 key.offset =3D (u64)-1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2514 dirid =3D key.objectid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2515 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2516 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2517 memmove(args->path, ptr= , total_len); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2518 args->path[total_len] = =3D '\0'; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2519 btrfs_put_fs_root(root); b84c85bbf5fc9bc Josef Bacik 2020-01-24 2520 root =3D NULL; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2521 btrfs_release_path(path= ); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2522 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2523 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2524 /* Get the bottom subvol= ume's name from ROOT_REF */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2525 key.objectid =3D treeid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2526 key.type =3D BTRFS_ROOT_= REF_KEY; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2527 key.offset =3D args->tre= eid; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2528 ret =3D btrfs_search_slo= t(NULL, fs_info->tree_root, &key, path, 0, 0); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2529 if (ret < 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2530 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2531 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2532 ret =3D -ENOENT; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2533 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2534 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2535 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2536 leaf =3D path->nodes[0]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2537 slot =3D path->slots[0]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2538 btrfs_item_key_to_cpu(le= af, &key, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2539 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2540 item_off =3D btrfs_item_= ptr_offset(leaf, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2541 item_len =3D btrfs_item_= size_nr(leaf, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2542 /* Check if dirid in ROO= T_REF corresponds to passed dirid */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2543 rref =3D btrfs_item_ptr(= leaf, slot, struct btrfs_root_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2544 if (args->dirid !=3D btr= fs_root_ref_dirid(leaf, rref)) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2545 ret =3D -EINVAL; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2546 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2547 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2548 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2549 /* Copy subvolume's name= */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2550 item_off +=3D sizeof(str= uct btrfs_root_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2551 item_len -=3D sizeof(str= uct btrfs_root_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2552 read_extent_buffer(leaf,= args->name, item_off, item_len); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2553 args->name[item_len] =3D= 0; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2554 = b84c85bbf5fc9bc Josef Bacik 2020-01-24 2555 out_put: b84c85bbf5fc9bc Josef Bacik 2020-01-24 @2556 btrfs_put_fs_root(root); ^= ^^^ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2557 out: 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2558 btrfs_free_path(path); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2559 return ret; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2560 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2561 = --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org --===============7140469816346919751==-- From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============3492421603922002871==" MIME-Version: 1.0 From: Dan Carpenter To: kbuild-all@lists.01.org Subject: [kdave-btrfs-devel:misc-next 128/167] fs/btrfs/ioctl.c:2556 btrfs_search_path_in_tree_user() error: uninitialized symbol 'root'. Date: Sat, 08 Feb 2020 11:18:33 +0300 Message-ID: <20200208081832.GP24804@kadam> List-Id: --===============3492421603922002871== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable tree: https://github.com/kdave/btrfs-devel.git misc-next head: 23ba1a90f0571d91b55bdfef7f06f380a74e8475 commit: b84c85bbf5fc9bce14edeb33768d0cc1d8bc91d5 [128/167] btrfs: hold a re= f on the root in btrfs_search_path_in_tree_user If you fix the issue, kindly add following tag Reported-by: kbuild test robot Reported-by: Dan Carpenter New smatch warnings: fs/btrfs/ioctl.c:2556 btrfs_search_path_in_tree_user() error: uninitialized= symbol 'root'. Old smatch warnings: fs/btrfs/ioctl.c:1566 btrfs_defrag_file() warn: should 'ret << 12' be a 64 = bit type? fs/btrfs/ioctl.c:3326 btrfs_extent_same() error: uninitialized symbol 'ret'. fs/btrfs/ioctl.c:3738 btrfs_clone() error: uninitialized symbol 'trans'. # https://github.com/kdave/btrfs-devel/commit/b84c85bbf5fc9bce14edeb33768d0= cc1d8bc91d5 git remote add kdave-btrfs-devel https://github.com/kdave/btrfs-devel.git git remote update kdave-btrfs-devel git checkout b84c85bbf5fc9bce14edeb33768d0cc1d8bc91d5 vim +/root +2556 fs/btrfs/ioctl.c ac8e9819d71f907 Chris Mason 2010-02-28 2391 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2392 static int btrfs_search_p= ath_in_tree_user(struct inode *inode, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2393 struct btrfs_ioctl_in= o_lookup_user_args *args) 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2394 { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2395 struct btrfs_fs_info *fs= _info =3D BTRFS_I(inode)->root->fs_info; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2396 struct super_block *sb = =3D inode->i_sb; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2397 struct btrfs_key upper_l= imit =3D BTRFS_I(inode)->location; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2398 u64 treeid =3D BTRFS_I(i= node)->root->root_key.objectid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2399 u64 dirid =3D args->diri= d; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2400 unsigned long item_off; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2401 unsigned long item_len; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2402 struct btrfs_inode_ref *= iref; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2403 struct btrfs_root_ref *r= ref; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2404 struct btrfs_root *root; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2405 struct btrfs_path *path; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2406 struct btrfs_key key, ke= y2; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2407 struct extent_buffer *le= af; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2408 struct inode *temp_inode; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2409 char *ptr; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2410 int slot; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2411 int len; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2412 int total_len =3D 0; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2413 int ret; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2414 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2415 path =3D btrfs_alloc_pat= h(); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2416 if (!path) 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2417 return -ENOMEM; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2418 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2419 /* 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2420 * If the bottom subvolu= me does not exist directly under upper_limit, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2421 * construct the path in= from the bottom up. 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2422 */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2423 if (dirid !=3D upper_lim= it.objectid) { "root" not initialized on the =3D=3D path. 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2424 ptr =3D &args->path[BTR= FS_INO_LOOKUP_USER_PATH_MAX - 1]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2425 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2426 key.objectid =3D treeid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2427 key.type =3D BTRFS_ROOT= _ITEM_KEY; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2428 key.offset =3D (u64)-1; 5312026004a7157 Josef Bacik 2020-01-24 2429 root =3D btrfs_get_fs_r= oot(fs_info, &key, true); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2430 if (IS_ERR(root)) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2431 ret =3D PTR_ERR(root); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2432 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2433 } b84c85bbf5fc9bc Josef Bacik 2020-01-24 2434 if (!btrfs_grab_fs_root= (root)) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2435 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2436 goto out; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2437 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2438 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2439 key.objectid =3D dirid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2440 key.type =3D BTRFS_INOD= E_REF_KEY; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2441 key.offset =3D (u64)-1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2442 while (1) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2443 ret =3D btrfs_search_s= lot(NULL, root, &key, path, 0, 0); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2444 if (ret < 0) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2445 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2446 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2447 ret =3D btrfs_previou= s_item(root, path, dirid, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2448 BTRFS_INODE_REF_= KEY); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2449 if (ret < 0) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2450 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2451 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2452 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2453 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2454 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2455 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2456 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2457 leaf =3D path->nodes[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2458 slot =3D path->slots[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2459 btrfs_item_key_to_cpu(= leaf, &key, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2460 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2461 iref =3D btrfs_item_pt= r(leaf, slot, struct btrfs_inode_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2462 len =3D btrfs_inode_re= f_name_len(leaf, iref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2463 ptr -=3D len + 1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2464 total_len +=3D len + 1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2465 if (ptr < args->path) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2466 ret =3D -ENAMETOOLONG; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2467 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2468 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2469 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2470 *(ptr + len) =3D '/'; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2471 read_extent_buffer(lea= f, ptr, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2472 (unsigned long)(iref= + 1), len); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2473 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2474 /* Check the read+exec= permission of this directory */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2475 ret =3D btrfs_previous= _item(root, path, dirid, 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2476 BTRFS_INODE_ITEM_= KEY); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2477 if (ret < 0) { b84c85bbf5fc9bc Josef Bacik 2020-01-24 2478 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2479 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2480 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2481 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2482 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2483 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2484 leaf =3D path->nodes[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2485 slot =3D path->slots[0= ]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2486 btrfs_item_key_to_cpu(= leaf, &key2, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2487 if (key2.objectid !=3D= dirid) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2488 ret =3D -ENOENT; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2489 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2490 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2491 = 4c66e0d4243bb88 David Sterba 2019-10-03 2492 temp_inode =3D btrfs_i= get(sb, &key2, root); 3ca57bd620639ee Misono Tomohiro 2018-06-04 2493 if (IS_ERR(temp_inode)= ) { 3ca57bd620639ee Misono Tomohiro 2018-06-04 2494 ret =3D PTR_ERR(temp_= inode); b84c85bbf5fc9bc Josef Bacik 2020-01-24 2495 goto out_put; 3ca57bd620639ee Misono Tomohiro 2018-06-04 2496 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2497 ret =3D inode_permissi= on(temp_inode, MAY_READ | MAY_EXEC); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2498 iput(temp_inode); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2499 if (ret) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2500 ret =3D -EACCES; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2501 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2502 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2503 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2504 if (key.offset =3D=3D = upper_limit.objectid) 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2505 break; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2506 if (key.objectid =3D= =3D BTRFS_FIRST_FREE_OBJECTID) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2507 ret =3D -EACCES; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2508 goto out_put; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2509 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2510 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2511 btrfs_release_path(pat= h); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2512 key.objectid =3D key.o= ffset; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2513 key.offset =3D (u64)-1; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2514 dirid =3D key.objectid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2515 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2516 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2517 memmove(args->path, ptr= , total_len); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2518 args->path[total_len] = =3D '\0'; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2519 btrfs_put_fs_root(root); b84c85bbf5fc9bc Josef Bacik 2020-01-24 2520 root =3D NULL; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2521 btrfs_release_path(path= ); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2522 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2523 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2524 /* Get the bottom subvol= ume's name from ROOT_REF */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2525 key.objectid =3D treeid; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2526 key.type =3D BTRFS_ROOT_= REF_KEY; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2527 key.offset =3D args->tre= eid; b84c85bbf5fc9bc Josef Bacik 2020-01-24 2528 ret =3D btrfs_search_slo= t(NULL, fs_info->tree_root, &key, path, 0, 0); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2529 if (ret < 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2530 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2531 } else if (ret > 0) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2532 ret =3D -ENOENT; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2533 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2534 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2535 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2536 leaf =3D path->nodes[0]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2537 slot =3D path->slots[0]; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2538 btrfs_item_key_to_cpu(le= af, &key, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2539 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2540 item_off =3D btrfs_item_= ptr_offset(leaf, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2541 item_len =3D btrfs_item_= size_nr(leaf, slot); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2542 /* Check if dirid in ROO= T_REF corresponds to passed dirid */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2543 rref =3D btrfs_item_ptr(= leaf, slot, struct btrfs_root_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2544 if (args->dirid !=3D btr= fs_root_ref_dirid(leaf, rref)) { 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2545 ret =3D -EINVAL; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2546 goto out; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2547 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2548 = 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2549 /* Copy subvolume's name= */ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2550 item_off +=3D sizeof(str= uct btrfs_root_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2551 item_len -=3D sizeof(str= uct btrfs_root_ref); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2552 read_extent_buffer(leaf,= args->name, item_off, item_len); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2553 args->name[item_len] =3D= 0; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2554 = b84c85bbf5fc9bc Josef Bacik 2020-01-24 2555 out_put: b84c85bbf5fc9bc Josef Bacik 2020-01-24 @2556 btrfs_put_fs_root(root); ^= ^^^ 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2557 out: 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2558 btrfs_free_path(path); 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2559 return ret; 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2560 } 23d0b79dfaed230 Tomohiro Misono 2018-05-21 2561 = --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org --===============3492421603922002871==--