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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>4 * Copyright (C) 2018 Samsung Electronics Co., Ltd.5 */6 7#include <linux/kernel.h>8#include <linux/fs.h>9#include <linux/filelock.h>10#include <linux/uaccess.h>11#include <linux/backing-dev.h>12#include <linux/writeback.h>13#include <linux/xattr.h>14#include <linux/falloc.h>15#include <linux/fsnotify.h>16#include <linux/dcache.h>17#include <linux/slab.h>18#include <linux/vmalloc.h>19#include <linux/sched/xacct.h>20#include <linux/crc32c.h>21#include <linux/namei.h>22 23#include "glob.h"24#include "oplock.h"25#include "connection.h"26#include "vfs.h"27#include "vfs_cache.h"28#include "smbacl.h"29#include "ndr.h"30#include "auth.h"31#include "misc.h"32 33#include "smb_common.h"34#include "mgmt/share_config.h"35#include "mgmt/tree_connect.h"36#include "mgmt/user_session.h"37#include "mgmt/user_config.h"38 39static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work,40 struct inode *parent_inode,41 struct inode *inode)42{43 if (!test_share_config_flag(work->tcon->share_conf,44 KSMBD_SHARE_FLAG_INHERIT_OWNER))45 return;46 47 i_uid_write(inode, i_uid_read(parent_inode));48}49 50/**51 * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable52 * @parent: parent dentry53 * @child: child dentry54 *55 * Returns: %0 on success, %-ENOENT if the parent dentry is not stable56 */57int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child)58{59 inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);60 if (child->d_parent != parent) {61 inode_unlock(d_inode(parent));62 return -ENOENT;63 }64 65 return 0;66}67 68static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf,69 char *pathname, unsigned int flags,70 struct path *parent_path,71 struct path *path)72{73 struct qstr last;74 struct filename *filename;75 struct path *root_share_path = &share_conf->vfs_path;76 int err, type;77 struct dentry *d;78 79 if (pathname[0] == '\0') {80 pathname = share_conf->path;81 root_share_path = NULL;82 } else {83 flags |= LOOKUP_BENEATH;84 }85 86 filename = getname_kernel(pathname);87 if (IS_ERR(filename))88 return PTR_ERR(filename);89 90 err = vfs_path_parent_lookup(filename, flags,91 parent_path, &last, &type,92 root_share_path);93 if (err) {94 putname(filename);95 return err;96 }97 98 if (unlikely(type != LAST_NORM)) {99 path_put(parent_path);100 putname(filename);101 return -ENOENT;102 }103 104 err = mnt_want_write(parent_path->mnt);105 if (err) {106 path_put(parent_path);107 putname(filename);108 return -ENOENT;109 }110 111 inode_lock_nested(parent_path->dentry->d_inode, I_MUTEX_PARENT);112 d = lookup_one_qstr_excl(&last, parent_path->dentry, 0);113 if (IS_ERR(d))114 goto err_out;115 116 if (d_is_negative(d)) {117 dput(d);118 goto err_out;119 }120 121 path->dentry = d;122 path->mnt = mntget(parent_path->mnt);123 124 if (test_share_config_flag(share_conf, KSMBD_SHARE_FLAG_CROSSMNT)) {125 err = follow_down(path, 0);126 if (err < 0) {127 path_put(path);128 goto err_out;129 }130 }131 132 putname(filename);133 return 0;134 135err_out:136 inode_unlock(d_inode(parent_path->dentry));137 mnt_drop_write(parent_path->mnt);138 path_put(parent_path);139 putname(filename);140 return -ENOENT;141}142 143void ksmbd_vfs_query_maximal_access(struct mnt_idmap *idmap,144 struct dentry *dentry, __le32 *daccess)145{146 *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL);147 148 if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_WRITE))149 *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE |150 FILE_WRITE_DATA | FILE_APPEND_DATA |151 FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES |152 FILE_DELETE_CHILD);153 154 if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_READ))155 *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE;156 157 if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_EXEC))158 *daccess |= FILE_EXECUTE_LE;159 160 if (!inode_permission(idmap, d_inode(dentry->d_parent), MAY_EXEC | MAY_WRITE))161 *daccess |= FILE_DELETE_LE;162}163 164/**165 * ksmbd_vfs_create() - vfs helper for smb create file166 * @work: work167 * @name: file name that is relative to share168 * @mode: file create mode169 *170 * Return: 0 on success, otherwise error171 */172int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)173{174 struct path path;175 struct dentry *dentry;176 int err;177 178 dentry = ksmbd_vfs_kern_path_create(work, name,179 LOOKUP_NO_SYMLINKS, &path);180 if (IS_ERR(dentry)) {181 err = PTR_ERR(dentry);182 if (err != -ENOENT)183 pr_err("path create failed for %s, err %d\n",184 name, err);185 return err;186 }187 188 mode |= S_IFREG;189 err = vfs_create(mnt_idmap(path.mnt), d_inode(path.dentry),190 dentry, mode, true);191 if (!err) {192 ksmbd_vfs_inherit_owner(work, d_inode(path.dentry),193 d_inode(dentry));194 } else {195 pr_err("File(%s): creation failed (err:%d)\n", name, err);196 }197 198 done_path_create(&path, dentry);199 return err;200}201 202/**203 * ksmbd_vfs_mkdir() - vfs helper for smb create directory204 * @work: work205 * @name: directory name that is relative to share206 * @mode: directory create mode207 *208 * Return: 0 on success, otherwise error209 */210int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)211{212 struct mnt_idmap *idmap;213 struct path path;214 struct dentry *dentry;215 int err;216 217 dentry = ksmbd_vfs_kern_path_create(work, name,218 LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,219 &path);220 if (IS_ERR(dentry)) {221 err = PTR_ERR(dentry);222 if (err != -EEXIST)223 ksmbd_debug(VFS, "path create failed for %s, err %d\n",224 name, err);225 return err;226 }227 228 idmap = mnt_idmap(path.mnt);229 mode |= S_IFDIR;230 err = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode);231 if (!err && d_unhashed(dentry)) {232 struct dentry *d;233 234 d = lookup_one(idmap, dentry->d_name.name, dentry->d_parent,235 dentry->d_name.len);236 if (IS_ERR(d)) {237 err = PTR_ERR(d);238 goto out_err;239 }240 if (unlikely(d_is_negative(d))) {241 dput(d);242 err = -ENOENT;243 goto out_err;244 }245 246 ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d));247 dput(d);248 }249 250out_err:251 done_path_create(&path, dentry);252 if (err)253 pr_err("mkdir(%s): creation failed (err:%d)\n", name, err);254 return err;255}256 257static ssize_t ksmbd_vfs_getcasexattr(struct mnt_idmap *idmap,258 struct dentry *dentry, char *attr_name,259 int attr_name_len, char **attr_value)260{261 char *name, *xattr_list = NULL;262 ssize_t value_len = -ENOENT, xattr_list_len;263 264 xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);265 if (xattr_list_len <= 0)266 goto out;267 268 for (name = xattr_list; name - xattr_list < xattr_list_len;269 name += strlen(name) + 1) {270 ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));271 if (strncasecmp(attr_name, name, attr_name_len))272 continue;273 274 value_len = ksmbd_vfs_getxattr(idmap,275 dentry,276 name,277 attr_value);278 if (value_len < 0)279 pr_err("failed to get xattr in file\n");280 break;281 }282 283out:284 kvfree(xattr_list);285 return value_len;286}287 288static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos,289 size_t count)290{291 ssize_t v_len;292 char *stream_buf = NULL;293 294 ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n",295 *pos, count);296 297 v_len = ksmbd_vfs_getcasexattr(file_mnt_idmap(fp->filp),298 fp->filp->f_path.dentry,299 fp->stream.name,300 fp->stream.size,301 &stream_buf);302 if ((int)v_len <= 0)303 return (int)v_len;304 305 if (v_len <= *pos) {306 count = -EINVAL;307 goto free_buf;308 }309 310 if (v_len - *pos < count)311 count = v_len - *pos;312 313 memcpy(buf, &stream_buf[*pos], count);314 315free_buf:316 kvfree(stream_buf);317 return count;318}319 320/**321 * check_lock_range() - vfs helper for smb byte range file locking322 * @filp: the file to apply the lock to323 * @start: lock start byte offset324 * @end: lock end byte offset325 * @type: byte range type read/write326 *327 * Return: 0 on success, otherwise error328 */329static int check_lock_range(struct file *filp, loff_t start, loff_t end,330 unsigned char type)331{332 struct file_lock *flock;333 struct file_lock_context *ctx = locks_inode_context(file_inode(filp));334 int error = 0;335 336 if (!ctx || list_empty_careful(&ctx->flc_posix))337 return 0;338 339 spin_lock(&ctx->flc_lock);340 for_each_file_lock(flock, &ctx->flc_posix) {341 /* check conflict locks */342 if (flock->fl_end >= start && end >= flock->fl_start) {343 if (lock_is_read(flock)) {344 if (type == WRITE) {345 pr_err("not allow write by shared lock\n");346 error = 1;347 goto out;348 }349 } else if (lock_is_write(flock)) {350 /* check owner in lock */351 if (flock->c.flc_file != filp) {352 error = 1;353 pr_err("not allow rw access by exclusive lock from other opens\n");354 goto out;355 }356 }357 }358 }359out:360 spin_unlock(&ctx->flc_lock);361 return error;362}363 364/**365 * ksmbd_vfs_read() - vfs helper for smb file read366 * @work: smb work367 * @fp: ksmbd file pointer368 * @count: read byte count369 * @pos: file pos370 * @rbuf: read data buffer371 *372 * Return: number of read bytes on success, otherwise error373 */374int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,375 loff_t *pos, char *rbuf)376{377 struct file *filp = fp->filp;378 ssize_t nbytes = 0;379 struct inode *inode = file_inode(filp);380 381 if (S_ISDIR(inode->i_mode))382 return -EISDIR;383 384 if (unlikely(count == 0))385 return 0;386 387 if (work->conn->connection_type) {388 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {389 pr_err("no right to read(%pD)\n", fp->filp);390 return -EACCES;391 }392 }393 394 if (ksmbd_stream_fd(fp))395 return ksmbd_vfs_stream_read(fp, rbuf, pos, count);396 397 if (!work->tcon->posix_extensions) {398 int ret;399 400 ret = check_lock_range(filp, *pos, *pos + count - 1, READ);401 if (ret) {402 pr_err("unable to read due to lock\n");403 return -EAGAIN;404 }405 }406 407 nbytes = kernel_read(filp, rbuf, count, pos);408 if (nbytes < 0) {409 pr_err("smb read failed, err = %zd\n", nbytes);410 return nbytes;411 }412 413 filp->f_pos = *pos;414 return nbytes;415}416 417static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,418 size_t count)419{420 char *stream_buf = NULL, *wbuf;421 struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);422 size_t size;423 ssize_t v_len;424 int err = 0;425 426 ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n",427 *pos, count);428 429 size = *pos + count;430 if (size > XATTR_SIZE_MAX) {431 size = XATTR_SIZE_MAX;432 count = (*pos + count) - XATTR_SIZE_MAX;433 }434 435 v_len = ksmbd_vfs_getcasexattr(idmap,436 fp->filp->f_path.dentry,437 fp->stream.name,438 fp->stream.size,439 &stream_buf);440 if (v_len < 0) {441 pr_err("not found stream in xattr : %zd\n", v_len);442 err = v_len;443 goto out;444 }445 446 if (v_len < size) {447 wbuf = kvzalloc(size, GFP_KERNEL);448 if (!wbuf) {449 err = -ENOMEM;450 goto out;451 }452 453 if (v_len > 0)454 memcpy(wbuf, stream_buf, v_len);455 kvfree(stream_buf);456 stream_buf = wbuf;457 }458 459 memcpy(&stream_buf[*pos], buf, count);460 461 err = ksmbd_vfs_setxattr(idmap,462 &fp->filp->f_path,463 fp->stream.name,464 (void *)stream_buf,465 size,466 0,467 true);468 if (err < 0)469 goto out;470 471 fp->filp->f_pos = *pos;472 err = 0;473out:474 kvfree(stream_buf);475 return err;476}477 478/**479 * ksmbd_vfs_write() - vfs helper for smb file write480 * @work: work481 * @fp: ksmbd file pointer482 * @buf: buf containing data for writing483 * @count: read byte count484 * @pos: file pos485 * @sync: fsync after write486 * @written: number of bytes written487 *488 * Return: 0 on success, otherwise error489 */490int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,491 char *buf, size_t count, loff_t *pos, bool sync,492 ssize_t *written)493{494 struct file *filp;495 loff_t offset = *pos;496 int err = 0;497 498 if (work->conn->connection_type) {499 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {500 pr_err("no right to write(%pD)\n", fp->filp);501 err = -EACCES;502 goto out;503 }504 }505 506 filp = fp->filp;507 508 if (ksmbd_stream_fd(fp)) {509 err = ksmbd_vfs_stream_write(fp, buf, pos, count);510 if (!err)511 *written = count;512 goto out;513 }514 515 if (!work->tcon->posix_extensions) {516 err = check_lock_range(filp, *pos, *pos + count - 1, WRITE);517 if (err) {518 pr_err("unable to write due to lock\n");519 err = -EAGAIN;520 goto out;521 }522 }523 524 /* Reserve lease break for parent dir at closing time */525 fp->reserve_lease_break = true;526 527 /* Do we need to break any of a levelII oplock? */528 smb_break_all_levII_oplock(work, fp, 1);529 530 err = kernel_write(filp, buf, count, pos);531 if (err < 0) {532 ksmbd_debug(VFS, "smb write failed, err = %d\n", err);533 goto out;534 }535 536 filp->f_pos = *pos;537 *written = err;538 err = 0;539 if (sync) {540 err = vfs_fsync_range(filp, offset, offset + *written, 0);541 if (err < 0)542 pr_err("fsync failed for filename = %pD, err = %d\n",543 fp->filp, err);544 }545 546out:547 return err;548}549 550/**551 * ksmbd_vfs_getattr() - vfs helper for smb getattr552 * @path: path of dentry553 * @stat: pointer to returned kernel stat structure554 * Return: 0 on success, otherwise error555 */556int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat)557{558 int err;559 560 err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT);561 if (err)562 pr_err("getattr failed, err %d\n", err);563 return err;564}565 566/**567 * ksmbd_vfs_fsync() - vfs helper for smb fsync568 * @work: work569 * @fid: file id of open file570 * @p_id: persistent file id571 *572 * Return: 0 on success, otherwise error573 */574int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id)575{576 struct ksmbd_file *fp;577 int err;578 579 fp = ksmbd_lookup_fd_slow(work, fid, p_id);580 if (!fp) {581 pr_err("failed to get filp for fid %llu\n", fid);582 return -ENOENT;583 }584 err = vfs_fsync(fp->filp, 0);585 if (err < 0)586 pr_err("smb fsync failed, err = %d\n", err);587 ksmbd_fd_put(work, fp);588 return err;589}590 591/**592 * ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink593 * @work: work594 * @path: path of dentry595 *596 * Return: 0 on success, otherwise error597 */598int ksmbd_vfs_remove_file(struct ksmbd_work *work, const struct path *path)599{600 struct mnt_idmap *idmap;601 struct dentry *parent = path->dentry->d_parent;602 int err;603 604 if (ksmbd_override_fsids(work))605 return -ENOMEM;606 607 if (!d_inode(path->dentry)->i_nlink) {608 err = -ENOENT;609 goto out_err;610 }611 612 idmap = mnt_idmap(path->mnt);613 if (S_ISDIR(d_inode(path->dentry)->i_mode)) {614 err = vfs_rmdir(idmap, d_inode(parent), path->dentry);615 if (err && err != -ENOTEMPTY)616 ksmbd_debug(VFS, "rmdir failed, err %d\n", err);617 } else {618 err = vfs_unlink(idmap, d_inode(parent), path->dentry, NULL);619 if (err)620 ksmbd_debug(VFS, "unlink failed, err %d\n", err);621 }622 623out_err:624 ksmbd_revert_fsids(work);625 return err;626}627 628/**629 * ksmbd_vfs_link() - vfs helper for creating smb hardlink630 * @work: work631 * @oldname: source file name632 * @newname: hardlink name that is relative to share633 *634 * Return: 0 on success, otherwise error635 */636int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname,637 const char *newname)638{639 struct path oldpath, newpath;640 struct dentry *dentry;641 int err;642 643 if (ksmbd_override_fsids(work))644 return -ENOMEM;645 646 err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath);647 if (err) {648 pr_err("cannot get linux path for %s, err = %d\n",649 oldname, err);650 goto out1;651 }652 653 dentry = ksmbd_vfs_kern_path_create(work, newname,654 LOOKUP_NO_SYMLINKS | LOOKUP_REVAL,655 &newpath);656 if (IS_ERR(dentry)) {657 err = PTR_ERR(dentry);658 pr_err("path create err for %s, err %d\n", newname, err);659 goto out2;660 }661 662 err = -EXDEV;663 if (oldpath.mnt != newpath.mnt) {664 pr_err("vfs_link failed err %d\n", err);665 goto out3;666 }667 668 err = vfs_link(oldpath.dentry, mnt_idmap(newpath.mnt),669 d_inode(newpath.dentry),670 dentry, NULL);671 if (err)672 ksmbd_debug(VFS, "vfs_link failed err %d\n", err);673 674out3:675 done_path_create(&newpath, dentry);676out2:677 path_put(&oldpath);678out1:679 ksmbd_revert_fsids(work);680 return err;681}682 683int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path,684 char *newname, int flags)685{686 struct dentry *old_parent, *new_dentry, *trap;687 struct dentry *old_child = old_path->dentry;688 struct path new_path;689 struct qstr new_last;690 struct renamedata rd;691 struct filename *to;692 struct ksmbd_share_config *share_conf = work->tcon->share_conf;693 struct ksmbd_file *parent_fp;694 int new_type;695 int err, lookup_flags = LOOKUP_NO_SYMLINKS;696 697 if (ksmbd_override_fsids(work))698 return -ENOMEM;699 700 to = getname_kernel(newname);701 if (IS_ERR(to)) {702 err = PTR_ERR(to);703 goto revert_fsids;704 }705 706retry:707 err = vfs_path_parent_lookup(to, lookup_flags | LOOKUP_BENEATH,708 &new_path, &new_last, &new_type,709 &share_conf->vfs_path);710 if (err)711 goto out1;712 713 if (old_path->mnt != new_path.mnt) {714 err = -EXDEV;715 goto out2;716 }717 718 err = mnt_want_write(old_path->mnt);719 if (err)720 goto out2;721 722 trap = lock_rename_child(old_child, new_path.dentry);723 if (IS_ERR(trap)) {724 err = PTR_ERR(trap);725 goto out_drop_write;726 }727 728 old_parent = dget(old_child->d_parent);729 if (d_unhashed(old_child)) {730 err = -EINVAL;731 goto out3;732 }733 734 parent_fp = ksmbd_lookup_fd_inode(old_child->d_parent);735 if (parent_fp) {736 if (parent_fp->daccess & FILE_DELETE_LE) {737 pr_err("parent dir is opened with delete access\n");738 err = -ESHARE;739 ksmbd_fd_put(work, parent_fp);740 goto out3;741 }742 ksmbd_fd_put(work, parent_fp);743 }744 745 new_dentry = lookup_one_qstr_excl(&new_last, new_path.dentry,746 lookup_flags | LOOKUP_RENAME_TARGET);747 if (IS_ERR(new_dentry)) {748 err = PTR_ERR(new_dentry);749 goto out3;750 }751 752 if (d_is_symlink(new_dentry)) {753 err = -EACCES;754 goto out4;755 }756 757 /*758 * explicitly handle file overwrite case, for compatibility with759 * filesystems that may not support rename flags (e.g: fuse)760 */761 if ((flags & RENAME_NOREPLACE) && d_is_positive(new_dentry)) {762 err = -EEXIST;763 goto out4;764 }765 flags &= ~(RENAME_NOREPLACE);766 767 if (old_child == trap) {768 err = -EINVAL;769 goto out4;770 }771 772 if (new_dentry == trap) {773 err = -ENOTEMPTY;774 goto out4;775 }776 777 rd.old_mnt_idmap = mnt_idmap(old_path->mnt),778 rd.old_dir = d_inode(old_parent),779 rd.old_dentry = old_child,780 rd.new_mnt_idmap = mnt_idmap(new_path.mnt),781 rd.new_dir = new_path.dentry->d_inode,782 rd.new_dentry = new_dentry,783 rd.flags = flags,784 rd.delegated_inode = NULL,785 err = vfs_rename(&rd);786 if (err)787 ksmbd_debug(VFS, "vfs_rename failed err %d\n", err);788 789out4:790 dput(new_dentry);791out3:792 dput(old_parent);793 unlock_rename(old_parent, new_path.dentry);794out_drop_write:795 mnt_drop_write(old_path->mnt);796out2:797 path_put(&new_path);798 799 if (retry_estale(err, lookup_flags)) {800 lookup_flags |= LOOKUP_REVAL;801 goto retry;802 }803out1:804 putname(to);805revert_fsids:806 ksmbd_revert_fsids(work);807 return err;808}809 810/**811 * ksmbd_vfs_truncate() - vfs helper for smb file truncate812 * @work: work813 * @fp: ksmbd file pointer814 * @size: truncate to given size815 *816 * Return: 0 on success, otherwise error817 */818int ksmbd_vfs_truncate(struct ksmbd_work *work,819 struct ksmbd_file *fp, loff_t size)820{821 int err = 0;822 struct file *filp;823 824 filp = fp->filp;825 826 /* Do we need to break any of a levelII oplock? */827 smb_break_all_levII_oplock(work, fp, 1);828 829 if (!work->tcon->posix_extensions) {830 struct inode *inode = file_inode(filp);831 832 if (size < inode->i_size) {833 err = check_lock_range(filp, size,834 inode->i_size - 1, WRITE);835 } else {836 err = check_lock_range(filp, inode->i_size,837 size - 1, WRITE);838 }839 840 if (err) {841 pr_err("failed due to lock\n");842 return -EAGAIN;843 }844 }845 846 err = vfs_truncate(&filp->f_path, size);847 if (err)848 pr_err("truncate failed, err %d\n", err);849 return err;850}851 852/**853 * ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes854 * @dentry: dentry of file for listing xattrs855 * @list: destination buffer856 *857 * Return: xattr list length on success, otherwise error858 */859ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list)860{861 ssize_t size;862 char *vlist = NULL;863 864 size = vfs_listxattr(dentry, NULL, 0);865 if (size <= 0)866 return size;867 868 vlist = kvzalloc(size, GFP_KERNEL);869 if (!vlist)870 return -ENOMEM;871 872 *list = vlist;873 size = vfs_listxattr(dentry, vlist, size);874 if (size < 0) {875 ksmbd_debug(VFS, "listxattr failed\n");876 kvfree(vlist);877 *list = NULL;878 }879 880 return size;881}882 883static ssize_t ksmbd_vfs_xattr_len(struct mnt_idmap *idmap,884 struct dentry *dentry, char *xattr_name)885{886 return vfs_getxattr(idmap, dentry, xattr_name, NULL, 0);887}888 889/**890 * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value891 * @idmap: idmap892 * @dentry: dentry of file for getting xattrs893 * @xattr_name: name of xattr name to query894 * @xattr_buf: destination buffer xattr value895 *896 * Return: read xattr value length on success, otherwise error897 */898ssize_t ksmbd_vfs_getxattr(struct mnt_idmap *idmap,899 struct dentry *dentry,900 char *xattr_name, char **xattr_buf)901{902 ssize_t xattr_len;903 char *buf;904 905 *xattr_buf = NULL;906 xattr_len = ksmbd_vfs_xattr_len(idmap, dentry, xattr_name);907 if (xattr_len < 0)908 return xattr_len;909 910 buf = kmalloc(xattr_len + 1, GFP_KERNEL);911 if (!buf)912 return -ENOMEM;913 914 xattr_len = vfs_getxattr(idmap, dentry, xattr_name,915 (void *)buf, xattr_len);916 if (xattr_len > 0)917 *xattr_buf = buf;918 else919 kfree(buf);920 return xattr_len;921}922 923/**924 * ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value925 * @idmap: idmap of the relevant mount926 * @path: path of dentry to set XATTR at927 * @attr_name: xattr name for setxattr928 * @attr_value: xattr value to set929 * @attr_size: size of xattr value930 * @flags: destination buffer length931 * @get_write: get write access to a mount932 *933 * Return: 0 on success, otherwise error934 */935int ksmbd_vfs_setxattr(struct mnt_idmap *idmap,936 const struct path *path, const char *attr_name,937 void *attr_value, size_t attr_size, int flags,938 bool get_write)939{940 int err;941 942 if (get_write == true) {943 err = mnt_want_write(path->mnt);944 if (err)945 return err;946 }947 948 err = vfs_setxattr(idmap,949 path->dentry,950 attr_name,951 attr_value,952 attr_size,953 flags);954 if (err)955 ksmbd_debug(VFS, "setxattr failed, err %d\n", err);956 if (get_write == true)957 mnt_drop_write(path->mnt);958 return err;959}960 961/**962 * ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options963 * @filp: file pointer for IO964 * @option: smb IO options965 */966void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option)967{968 struct address_space *mapping;969 970 mapping = filp->f_mapping;971 972 if (!option || !mapping)973 return;974 975 if (option & FILE_WRITE_THROUGH_LE) {976 filp->f_flags |= O_SYNC;977 } else if (option & FILE_SEQUENTIAL_ONLY_LE) {978 filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2;979 spin_lock(&filp->f_lock);980 filp->f_mode &= ~FMODE_RANDOM;981 spin_unlock(&filp->f_lock);982 } else if (option & FILE_RANDOM_ACCESS_LE) {983 spin_lock(&filp->f_lock);984 filp->f_mode |= FMODE_RANDOM;985 spin_unlock(&filp->f_lock);986 }987}988 989int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,990 loff_t off, loff_t len)991{992 smb_break_all_levII_oplock(work, fp, 1);993 if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE)994 return vfs_fallocate(fp->filp,995 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,996 off, len);997 998 return vfs_fallocate(fp->filp,999 FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE,1000 off, len);1001}1002 1003int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,1004 struct file_allocated_range_buffer *ranges,1005 unsigned int in_count, unsigned int *out_count)1006{1007 struct file *f = fp->filp;1008 struct inode *inode = file_inode(fp->filp);1009 loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end;1010 loff_t extent_start, extent_end;1011 int ret = 0;1012 1013 if (start > maxbytes)1014 return -EFBIG;1015 1016 if (!in_count)1017 return 0;1018 1019 /*1020 * Shrink request scope to what the fs can actually handle.1021 */1022 if (length > maxbytes || (maxbytes - length) < start)1023 length = maxbytes - start;1024 1025 if (start + length > inode->i_size)1026 length = inode->i_size - start;1027 1028 *out_count = 0;1029 end = start + length;1030 while (start < end && *out_count < in_count) {1031 extent_start = vfs_llseek(f, start, SEEK_DATA);1032 if (extent_start < 0) {1033 if (extent_start != -ENXIO)1034 ret = (int)extent_start;1035 break;1036 }1037 1038 if (extent_start >= end)1039 break;1040 1041 extent_end = vfs_llseek(f, extent_start, SEEK_HOLE);1042 if (extent_end < 0) {1043 if (extent_end != -ENXIO)1044 ret = (int)extent_end;1045 break;1046 } else if (extent_start >= extent_end) {1047 break;1048 }1049 1050 ranges[*out_count].file_offset = cpu_to_le64(extent_start);1051 ranges[(*out_count)++].length =1052 cpu_to_le64(min(extent_end, end) - extent_start);1053 1054 start = extent_end;1055 }1056 1057 return ret;1058}1059 1060int ksmbd_vfs_remove_xattr(struct mnt_idmap *idmap,1061 const struct path *path, char *attr_name,1062 bool get_write)1063{1064 int err;1065 1066 if (get_write == true) {1067 err = mnt_want_write(path->mnt);1068 if (err)1069 return err;1070 }1071 1072 err = vfs_removexattr(idmap, path->dentry, attr_name);1073 1074 if (get_write == true)1075 mnt_drop_write(path->mnt);1076 1077 return err;1078}1079 1080int ksmbd_vfs_unlink(struct file *filp)1081{1082 int err = 0;1083 struct dentry *dir, *dentry = filp->f_path.dentry;1084 struct mnt_idmap *idmap = file_mnt_idmap(filp);1085 1086 err = mnt_want_write(filp->f_path.mnt);1087 if (err)1088 return err;1089 1090 dir = dget_parent(dentry);1091 err = ksmbd_vfs_lock_parent(dir, dentry);1092 if (err)1093 goto out;1094 dget(dentry);1095 1096 if (S_ISDIR(d_inode(dentry)->i_mode))1097 err = vfs_rmdir(idmap, d_inode(dir), dentry);1098 else1099 err = vfs_unlink(idmap, d_inode(dir), dentry, NULL);1100 1101 dput(dentry);1102 inode_unlock(d_inode(dir));1103 if (err)1104 ksmbd_debug(VFS, "failed to delete, err %d\n", err);1105out:1106 dput(dir);1107 mnt_drop_write(filp->f_path.mnt);1108 1109 return err;1110}1111 1112static bool __dir_empty(struct dir_context *ctx, const char *name, int namlen,1113 loff_t offset, u64 ino, unsigned int d_type)1114{1115 struct ksmbd_readdir_data *buf;1116 1117 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);1118 if (!is_dot_dotdot(name, namlen))1119 buf->dirent_count++;1120 1121 return !buf->dirent_count;1122}1123 1124/**1125 * ksmbd_vfs_empty_dir() - check for empty directory1126 * @fp: ksmbd file pointer1127 *1128 * Return: true if directory empty, otherwise false1129 */1130int ksmbd_vfs_empty_dir(struct ksmbd_file *fp)1131{1132 int err;1133 struct ksmbd_readdir_data readdir_data;1134 1135 memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data));1136 1137 set_ctx_actor(&readdir_data.ctx, __dir_empty);1138 readdir_data.dirent_count = 0;1139 1140 err = iterate_dir(fp->filp, &readdir_data.ctx);1141 if (readdir_data.dirent_count)1142 err = -ENOTEMPTY;1143 else1144 err = 0;1145 return err;1146}1147 1148static bool __caseless_lookup(struct dir_context *ctx, const char *name,1149 int namlen, loff_t offset, u64 ino,1150 unsigned int d_type)1151{1152 struct ksmbd_readdir_data *buf;1153 int cmp = -EINVAL;1154 1155 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);1156 1157 if (buf->used != namlen)1158 return true;1159 if (IS_ENABLED(CONFIG_UNICODE) && buf->um) {1160 const struct qstr q_buf = {.name = buf->private,1161 .len = buf->used};1162 const struct qstr q_name = {.name = name,1163 .len = namlen};1164 1165 cmp = utf8_strncasecmp(buf->um, &q_buf, &q_name);1166 }1167 if (cmp < 0)1168 cmp = strncasecmp((char *)buf->private, name, namlen);1169 if (!cmp) {1170 memcpy((char *)buf->private, name, buf->used);1171 buf->dirent_count = 1;1172 return false;1173 }1174 return true;1175}1176 1177/**1178 * ksmbd_vfs_lookup_in_dir() - lookup a file in a directory1179 * @dir: path info1180 * @name: filename to lookup1181 * @namelen: filename length1182 * @um: &struct unicode_map to use1183 *1184 * Return: 0 on success, otherwise error1185 */1186static int ksmbd_vfs_lookup_in_dir(const struct path *dir, char *name,1187 size_t namelen, struct unicode_map *um)1188{1189 int ret;1190 struct file *dfilp;1191 int flags = O_RDONLY | O_LARGEFILE;1192 struct ksmbd_readdir_data readdir_data = {1193 .ctx.actor = __caseless_lookup,1194 .private = name,1195 .used = namelen,1196 .dirent_count = 0,1197 .um = um,1198 };1199 1200 dfilp = dentry_open(dir, flags, current_cred());1201 if (IS_ERR(dfilp))1202 return PTR_ERR(dfilp);1203 1204 ret = iterate_dir(dfilp, &readdir_data.ctx);1205 if (readdir_data.dirent_count > 0)1206 ret = 0;1207 fput(dfilp);1208 return ret;1209}1210 1211/**1212 * ksmbd_vfs_kern_path_locked() - lookup a file and get path info1213 * @work: work1214 * @name: file path that is relative to share1215 * @flags: lookup flags1216 * @parent_path: if lookup succeed, return parent_path info1217 * @path: if lookup succeed, return path info1218 * @caseless: caseless filename lookup1219 *1220 * Return: 0 on success, otherwise error1221 */1222int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,1223 unsigned int flags, struct path *parent_path,1224 struct path *path, bool caseless)1225{1226 struct ksmbd_share_config *share_conf = work->tcon->share_conf;1227 int err;1228 1229 err = ksmbd_vfs_path_lookup_locked(share_conf, name, flags, parent_path,1230 path);1231 if (!err)1232 return 0;1233 1234 if (caseless) {1235 char *filepath;1236 size_t path_len, remain_len;1237 1238 filepath = name;1239 path_len = strlen(filepath);1240 remain_len = path_len;1241 1242 *parent_path = share_conf->vfs_path;1243 path_get(parent_path);1244 1245 while (d_can_lookup(parent_path->dentry)) {1246 char *filename = filepath + path_len - remain_len;1247 char *next = strchrnul(filename, '/');1248 size_t filename_len = next - filename;1249 bool is_last = !next[0];1250 1251 if (filename_len == 0)1252 break;1253 1254 err = ksmbd_vfs_lookup_in_dir(parent_path, filename,1255 filename_len,1256 work->conn->um);1257 if (err)1258 goto out2;1259 1260 next[0] = '\0';1261 1262 err = vfs_path_lookup(share_conf->vfs_path.dentry,1263 share_conf->vfs_path.mnt,1264 filepath,1265 flags,1266 path);1267 if (err)1268 goto out2;1269 else if (is_last)1270 goto out1;1271 path_put(parent_path);1272 *parent_path = *path;1273 1274 next[0] = '/';1275 remain_len -= filename_len + 1;1276 }1277 1278 err = -EINVAL;1279out2:1280 path_put(parent_path);1281 }1282 1283out1:1284 if (!err) {1285 err = mnt_want_write(parent_path->mnt);1286 if (err) {1287 path_put(path);1288 path_put(parent_path);1289 return err;1290 }1291 1292 err = ksmbd_vfs_lock_parent(parent_path->dentry, path->dentry);1293 if (err) {1294 path_put(path);1295 path_put(parent_path);1296 }1297 }1298 return err;1299}1300 1301void ksmbd_vfs_kern_path_unlock(struct path *parent_path, struct path *path)1302{1303 inode_unlock(d_inode(parent_path->dentry));1304 mnt_drop_write(parent_path->mnt);1305 path_put(path);1306 path_put(parent_path);1307}1308 1309struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,1310 const char *name,1311 unsigned int flags,1312 struct path *path)1313{1314 char *abs_name;1315 struct dentry *dent;1316 1317 abs_name = convert_to_unix_name(work->tcon->share_conf, name);1318 if (!abs_name)1319 return ERR_PTR(-ENOMEM);1320 1321 dent = kern_path_create(AT_FDCWD, abs_name, path, flags);1322 kfree(abs_name);1323 return dent;1324}1325 1326int ksmbd_vfs_remove_acl_xattrs(struct mnt_idmap *idmap,1327 const struct path *path)1328{1329 char *name, *xattr_list = NULL;1330 ssize_t xattr_list_len;1331 int err = 0;1332 1333 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);1334 if (xattr_list_len < 0) {1335 goto out;1336 } else if (!xattr_list_len) {1337 ksmbd_debug(SMB, "empty xattr in the file\n");1338 goto out;1339 }1340 1341 err = mnt_want_write(path->mnt);1342 if (err)1343 goto out;1344 1345 for (name = xattr_list; name - xattr_list < xattr_list_len;1346 name += strlen(name) + 1) {1347 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));1348 1349 if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS,1350 sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) ||1351 !strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,1352 sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) {1353 err = vfs_remove_acl(idmap, path->dentry, name);1354 if (err)1355 ksmbd_debug(SMB,1356 "remove acl xattr failed : %s\n", name);1357 }1358 }1359 mnt_drop_write(path->mnt);1360 1361out:1362 kvfree(xattr_list);1363 return err;1364}1365 1366int ksmbd_vfs_remove_sd_xattrs(struct mnt_idmap *idmap, const struct path *path)1367{1368 char *name, *xattr_list = NULL;1369 ssize_t xattr_list_len;1370 int err = 0;1371 1372 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);1373 if (xattr_list_len < 0) {1374 goto out;1375 } else if (!xattr_list_len) {1376 ksmbd_debug(SMB, "empty xattr in the file\n");1377 goto out;1378 }1379 1380 for (name = xattr_list; name - xattr_list < xattr_list_len;1381 name += strlen(name) + 1) {1382 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));1383 1384 if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) {1385 err = ksmbd_vfs_remove_xattr(idmap, path, name, true);1386 if (err)1387 ksmbd_debug(SMB, "remove xattr failed : %s\n", name);1388 }1389 }1390out:1391 kvfree(xattr_list);1392 return err;1393}1394 1395static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct mnt_idmap *idmap,1396 struct inode *inode,1397 int acl_type)1398{1399 struct xattr_smb_acl *smb_acl = NULL;1400 struct posix_acl *posix_acls;1401 struct posix_acl_entry *pa_entry;1402 struct xattr_acl_entry *xa_entry;1403 int i;1404 1405 if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))1406 return NULL;1407 1408 posix_acls = get_inode_acl(inode, acl_type);1409 if (IS_ERR_OR_NULL(posix_acls))1410 return NULL;1411 1412 smb_acl = kzalloc(sizeof(struct xattr_smb_acl) +1413 sizeof(struct xattr_acl_entry) * posix_acls->a_count,1414 GFP_KERNEL);1415 if (!smb_acl)1416 goto out;1417 1418 smb_acl->count = posix_acls->a_count;1419 pa_entry = posix_acls->a_entries;1420 xa_entry = smb_acl->entries;1421 for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) {1422 switch (pa_entry->e_tag) {1423 case ACL_USER:1424 xa_entry->type = SMB_ACL_USER;1425 xa_entry->uid = posix_acl_uid_translate(idmap, pa_entry);1426 break;1427 case ACL_USER_OBJ:1428 xa_entry->type = SMB_ACL_USER_OBJ;1429 break;1430 case ACL_GROUP:1431 xa_entry->type = SMB_ACL_GROUP;1432 xa_entry->gid = posix_acl_gid_translate(idmap, pa_entry);1433 break;1434 case ACL_GROUP_OBJ:1435 xa_entry->type = SMB_ACL_GROUP_OBJ;1436 break;1437 case ACL_OTHER:1438 xa_entry->type = SMB_ACL_OTHER;1439 break;1440 case ACL_MASK:1441 xa_entry->type = SMB_ACL_MASK;1442 break;1443 default:1444 pr_err("unknown type : 0x%x\n", pa_entry->e_tag);1445 goto out;1446 }1447 1448 if (pa_entry->e_perm & ACL_READ)1449 xa_entry->perm |= SMB_ACL_READ;1450 if (pa_entry->e_perm & ACL_WRITE)1451 xa_entry->perm |= SMB_ACL_WRITE;1452 if (pa_entry->e_perm & ACL_EXECUTE)1453 xa_entry->perm |= SMB_ACL_EXECUTE;1454 }1455out:1456 posix_acl_release(posix_acls);1457 return smb_acl;1458}1459 1460int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,1461 struct mnt_idmap *idmap,1462 const struct path *path,1463 struct smb_ntsd *pntsd, int len,1464 bool get_write)1465{1466 int rc;1467 struct ndr sd_ndr = {0}, acl_ndr = {0};1468 struct xattr_ntacl acl = {0};1469 struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL;1470 struct dentry *dentry = path->dentry;1471 struct inode *inode = d_inode(dentry);1472 1473 acl.version = 4;1474 acl.hash_type = XATTR_SD_HASH_TYPE_SHA256;1475 acl.current_time = ksmbd_UnixTimeToNT(current_time(inode));1476 1477 memcpy(acl.desc, "posix_acl", 9);1478 acl.desc_len = 10;1479 1480 pntsd->osidoffset =1481 cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF);1482 pntsd->gsidoffset =1483 cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF);1484 pntsd->dacloffset =1485 cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF);1486 1487 acl.sd_buf = (char *)pntsd;1488 acl.sd_size = len;1489 1490 rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash);1491 if (rc) {1492 pr_err("failed to generate hash for ndr acl\n");1493 return rc;1494 }1495 1496 smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,1497 ACL_TYPE_ACCESS);1498 if (S_ISDIR(inode->i_mode))1499 def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,1500 ACL_TYPE_DEFAULT);1501 1502 rc = ndr_encode_posix_acl(&acl_ndr, idmap, inode,1503 smb_acl, def_smb_acl);1504 if (rc) {1505 pr_err("failed to encode ndr to posix acl\n");1506 goto out;1507 }1508 1509 rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset,1510 acl.posix_acl_hash);1511 if (rc) {1512 pr_err("failed to generate hash for ndr acl\n");1513 goto out;1514 }1515 1516 rc = ndr_encode_v4_ntacl(&sd_ndr, &acl);1517 if (rc) {1518 pr_err("failed to encode ndr to posix acl\n");1519 goto out;1520 }1521 1522 rc = ksmbd_vfs_setxattr(idmap, path,1523 XATTR_NAME_SD, sd_ndr.data,1524 sd_ndr.offset, 0, get_write);1525 if (rc < 0)1526 pr_err("Failed to store XATTR ntacl :%d\n", rc);1527 1528 kfree(sd_ndr.data);1529out:1530 kfree(acl_ndr.data);1531 kfree(smb_acl);1532 kfree(def_smb_acl);1533 return rc;1534}1535 1536int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,1537 struct mnt_idmap *idmap,1538 struct dentry *dentry,1539 struct smb_ntsd **pntsd)1540{1541 int rc;1542 struct ndr n;1543 struct inode *inode = d_inode(dentry);1544 struct ndr acl_ndr = {0};1545 struct xattr_ntacl acl;1546 struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL;1547 __u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0};1548 1549 rc = ksmbd_vfs_getxattr(idmap, dentry, XATTR_NAME_SD, &n.data);1550 if (rc <= 0)1551 return rc;1552 1553 n.length = rc;1554 rc = ndr_decode_v4_ntacl(&n, &acl);1555 if (rc)1556 goto free_n_data;1557 1558 smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,1559 ACL_TYPE_ACCESS);1560 if (S_ISDIR(inode->i_mode))1561 def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode,1562 ACL_TYPE_DEFAULT);1563 1564 rc = ndr_encode_posix_acl(&acl_ndr, idmap, inode, smb_acl,1565 def_smb_acl);1566 if (rc) {1567 pr_err("failed to encode ndr to posix acl\n");1568 goto out_free;1569 }1570 1571 rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash);1572 if (rc) {1573 pr_err("failed to generate hash for ndr acl\n");1574 goto out_free;1575 }1576 1577 if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) {1578 pr_err("hash value diff\n");1579 rc = -EINVAL;1580 goto out_free;1581 }1582 1583 *pntsd = acl.sd_buf;1584 if (acl.sd_size < sizeof(struct smb_ntsd)) {1585 pr_err("sd size is invalid\n");1586 goto out_free;1587 }1588 1589 (*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) -1590 NDR_NTSD_OFFSETOF);1591 (*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) -1592 NDR_NTSD_OFFSETOF);1593 (*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) -1594 NDR_NTSD_OFFSETOF);1595 1596 rc = acl.sd_size;1597out_free:1598 kfree(acl_ndr.data);1599 kfree(smb_acl);1600 kfree(def_smb_acl);1601 if (rc < 0) {1602 kfree(acl.sd_buf);1603 *pntsd = NULL;1604 }1605 1606free_n_data:1607 kfree(n.data);1608 return rc;1609}1610 1611int ksmbd_vfs_set_dos_attrib_xattr(struct mnt_idmap *idmap,1612 const struct path *path,1613 struct xattr_dos_attrib *da,1614 bool get_write)1615{1616 struct ndr n;1617 int err;1618 1619 err = ndr_encode_dos_attr(&n, da);1620 if (err)1621 return err;1622 1623 err = ksmbd_vfs_setxattr(idmap, path, XATTR_NAME_DOS_ATTRIBUTE,1624 (void *)n.data, n.offset, 0, get_write);1625 if (err)1626 ksmbd_debug(SMB, "failed to store dos attribute in xattr\n");1627 kfree(n.data);1628 1629 return err;1630}1631 1632int ksmbd_vfs_get_dos_attrib_xattr(struct mnt_idmap *idmap,1633 struct dentry *dentry,1634 struct xattr_dos_attrib *da)1635{1636 struct ndr n;1637 int err;1638 1639 err = ksmbd_vfs_getxattr(idmap, dentry, XATTR_NAME_DOS_ATTRIBUTE,1640 (char **)&n.data);1641 if (err > 0) {1642 n.length = err;1643 if (ndr_decode_dos_attr(&n, da))1644 err = -EINVAL;1645 kfree(n.data);1646 } else {1647 ksmbd_debug(SMB, "failed to load dos attribute in xattr\n");1648 }1649 1650 return err;1651}1652 1653/**1654 * ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format1655 * @p: destination buffer1656 * @ksmbd_kstat: ksmbd kstat wrapper1657 *1658 * Returns: pointer to the converted &struct file_directory_info1659 */1660void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat)1661{1662 struct file_directory_info *info = (struct file_directory_info *)(*p);1663 struct kstat *kstat = ksmbd_kstat->kstat;1664 u64 time;1665 1666 info->FileIndex = 0;1667 info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);1668 time = ksmbd_UnixTimeToNT(kstat->atime);1669 info->LastAccessTime = cpu_to_le64(time);1670 time = ksmbd_UnixTimeToNT(kstat->mtime);1671 info->LastWriteTime = cpu_to_le64(time);1672 time = ksmbd_UnixTimeToNT(kstat->ctime);1673 info->ChangeTime = cpu_to_le64(time);1674 1675 if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {1676 info->EndOfFile = 0;1677 info->AllocationSize = 0;1678 } else {1679 info->EndOfFile = cpu_to_le64(kstat->size);1680 info->AllocationSize = cpu_to_le64(kstat->blocks << 9);1681 }1682 info->ExtFileAttributes = ksmbd_kstat->file_attributes;1683 1684 return info;1685}1686 1687int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,1688 struct mnt_idmap *idmap,1689 struct dentry *dentry,1690 struct ksmbd_kstat *ksmbd_kstat)1691{1692 struct ksmbd_share_config *share_conf = work->tcon->share_conf;1693 u64 time;1694 int rc;1695 struct path path = {1696 .mnt = share_conf->vfs_path.mnt,1697 .dentry = dentry,1698 };1699 1700 rc = vfs_getattr(&path, ksmbd_kstat->kstat,1701 STATX_BASIC_STATS | STATX_BTIME,1702 AT_STATX_SYNC_AS_STAT);1703 if (rc)1704 return rc;1705 1706 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);1707 ksmbd_kstat->create_time = time;1708 1709 /*1710 * set default value for the case that store dos attributes is not yes1711 * or that acl is disable in server's filesystem and the config is yes.1712 */1713 if (S_ISDIR(ksmbd_kstat->kstat->mode))1714 ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE;1715 else1716 ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE;1717 1718 if (test_share_config_flag(work->tcon->share_conf,1719 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {1720 struct xattr_dos_attrib da;1721 1722 rc = ksmbd_vfs_get_dos_attrib_xattr(idmap, dentry, &da);1723 if (rc > 0) {1724 ksmbd_kstat->file_attributes = cpu_to_le32(da.attr);1725 ksmbd_kstat->create_time = da.create_time;1726 } else {1727 ksmbd_debug(VFS, "fail to load dos attribute.\n");1728 }1729 }1730 1731 return 0;1732}1733 1734ssize_t ksmbd_vfs_casexattr_len(struct mnt_idmap *idmap,1735 struct dentry *dentry, char *attr_name,1736 int attr_name_len)1737{1738 char *name, *xattr_list = NULL;1739 ssize_t value_len = -ENOENT, xattr_list_len;1740 1741 xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);1742 if (xattr_list_len <= 0)1743 goto out;1744 1745 for (name = xattr_list; name - xattr_list < xattr_list_len;1746 name += strlen(name) + 1) {1747 ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));1748 if (strncasecmp(attr_name, name, attr_name_len))1749 continue;1750 1751 value_len = ksmbd_vfs_xattr_len(idmap, dentry, name);1752 break;1753 }1754 1755out:1756 kvfree(xattr_list);1757 return value_len;1758}1759 1760int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,1761 size_t *xattr_stream_name_size, int s_type)1762{1763 char *type, *buf;1764 1765 if (s_type == DIR_STREAM)1766 type = ":$INDEX_ALLOCATION";1767 else1768 type = ":$DATA";1769 1770 buf = kasprintf(GFP_KERNEL, "%s%s%s",1771 XATTR_NAME_STREAM, stream_name, type);1772 if (!buf)1773 return -ENOMEM;1774 1775 *xattr_stream_name = buf;1776 *xattr_stream_name_size = strlen(buf) + 1;1777 1778 return 0;1779}1780 1781int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,1782 struct ksmbd_file *src_fp,1783 struct ksmbd_file *dst_fp,1784 struct srv_copychunk *chunks,1785 unsigned int chunk_count,1786 unsigned int *chunk_count_written,1787 unsigned int *chunk_size_written,1788 loff_t *total_size_written)1789{1790 unsigned int i;1791 loff_t src_off, dst_off, src_file_size;1792 size_t len;1793 int ret;1794 1795 *chunk_count_written = 0;1796 *chunk_size_written = 0;1797 *total_size_written = 0;1798 1799 if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {1800 pr_err("no right to read(%pD)\n", src_fp->filp);1801 return -EACCES;1802 }1803 if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {1804 pr_err("no right to write(%pD)\n", dst_fp->filp);1805 return -EACCES;1806 }1807 1808 if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp))1809 return -EBADF;1810 1811 smb_break_all_levII_oplock(work, dst_fp, 1);1812 1813 if (!work->tcon->posix_extensions) {1814 for (i = 0; i < chunk_count; i++) {1815 src_off = le64_to_cpu(chunks[i].SourceOffset);1816 dst_off = le64_to_cpu(chunks[i].TargetOffset);1817 len = le32_to_cpu(chunks[i].Length);1818 1819 if (check_lock_range(src_fp->filp, src_off,1820 src_off + len - 1, READ))1821 return -EAGAIN;1822 if (check_lock_range(dst_fp->filp, dst_off,1823 dst_off + len - 1, WRITE))1824 return -EAGAIN;1825 }1826 }1827 1828 src_file_size = i_size_read(file_inode(src_fp->filp));1829 1830 for (i = 0; i < chunk_count; i++) {1831 src_off = le64_to_cpu(chunks[i].SourceOffset);1832 dst_off = le64_to_cpu(chunks[i].TargetOffset);1833 len = le32_to_cpu(chunks[i].Length);1834 1835 if (src_off + len > src_file_size)1836 return -E2BIG;1837 1838 ret = vfs_copy_file_range(src_fp->filp, src_off,1839 dst_fp->filp, dst_off, len, 0);1840 if (ret == -EOPNOTSUPP || ret == -EXDEV)1841 ret = vfs_copy_file_range(src_fp->filp, src_off,1842 dst_fp->filp, dst_off, len,1843 COPY_FILE_SPLICE);1844 if (ret < 0)1845 return ret;1846 1847 *chunk_count_written += 1;1848 *total_size_written += ret;1849 }1850 return 0;1851}1852 1853void ksmbd_vfs_posix_lock_wait(struct file_lock *flock)1854{1855 wait_event(flock->c.flc_wait, !flock->c.flc_blocker);1856}1857 1858int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout)1859{1860 return wait_event_interruptible_timeout(flock->c.flc_wait,1861 !flock->c.flc_blocker,1862 timeout);1863}1864 1865void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock)1866{1867 locks_delete_block(flock);1868}1869 1870int ksmbd_vfs_set_init_posix_acl(struct mnt_idmap *idmap,1871 struct path *path)1872{1873 struct posix_acl_state acl_state;1874 struct posix_acl *acls;1875 struct dentry *dentry = path->dentry;1876 struct inode *inode = d_inode(dentry);1877 int rc;1878 1879 if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))1880 return -EOPNOTSUPP;1881 1882 ksmbd_debug(SMB, "Set posix acls\n");1883 rc = init_acl_state(&acl_state, 1);1884 if (rc)1885 return rc;1886 1887 /* Set default owner group */1888 acl_state.owner.allow = (inode->i_mode & 0700) >> 6;1889 acl_state.group.allow = (inode->i_mode & 0070) >> 3;1890 acl_state.other.allow = inode->i_mode & 0007;1891 acl_state.users->aces[acl_state.users->n].uid = inode->i_uid;1892 acl_state.users->aces[acl_state.users->n++].perms.allow =1893 acl_state.owner.allow;1894 acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid;1895 acl_state.groups->aces[acl_state.groups->n++].perms.allow =1896 acl_state.group.allow;1897 acl_state.mask.allow = 0x07;1898 1899 acls = posix_acl_alloc(6, GFP_KERNEL);1900 if (!acls) {1901 free_acl_state(&acl_state);1902 return -ENOMEM;1903 }1904 posix_state_to_acl(&acl_state, acls->a_entries);1905 1906 rc = set_posix_acl(idmap, dentry, ACL_TYPE_ACCESS, acls);1907 if (rc < 0)1908 ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",1909 rc);1910 else if (S_ISDIR(inode->i_mode)) {1911 posix_state_to_acl(&acl_state, acls->a_entries);1912 rc = set_posix_acl(idmap, dentry, ACL_TYPE_DEFAULT, acls);1913 if (rc < 0)1914 ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",1915 rc);1916 }1917 1918 free_acl_state(&acl_state);1919 posix_acl_release(acls);1920 return rc;1921}1922 1923int ksmbd_vfs_inherit_posix_acl(struct mnt_idmap *idmap,1924 struct path *path, struct inode *parent_inode)1925{1926 struct posix_acl *acls;1927 struct posix_acl_entry *pace;1928 struct dentry *dentry = path->dentry;1929 struct inode *inode = d_inode(dentry);1930 int rc, i;1931 1932 if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))1933 return -EOPNOTSUPP;1934 1935 acls = get_inode_acl(parent_inode, ACL_TYPE_DEFAULT);1936 if (IS_ERR_OR_NULL(acls))1937 return -ENOENT;1938 pace = acls->a_entries;1939 1940 for (i = 0; i < acls->a_count; i++, pace++) {1941 if (pace->e_tag == ACL_MASK) {1942 pace->e_perm = 0x07;1943 break;1944 }1945 }1946 1947 rc = set_posix_acl(idmap, dentry, ACL_TYPE_ACCESS, acls);1948 if (rc < 0)1949 ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",1950 rc);1951 if (S_ISDIR(inode->i_mode)) {1952 rc = set_posix_acl(idmap, dentry, ACL_TYPE_DEFAULT,1953 acls);1954 if (rc < 0)1955 ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",1956 rc);1957 }1958 1959 posix_acl_release(acls);1960 return rc;1961}1962