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25885a35a7
filldir_t instances (directory iterators callbacks) used to return 0 for "OK, keep going" or -E... for "stop". Note that it's *NOT* how the error values are reported - the rules for those are callback-dependent and ->iterate{,_shared}() instances only care about zero vs. non-zero (look at emit_dir() and friends). So let's just return bool ("should we keep going?") - it's less confusing that way. The choice between "true means keep going" and "true means stop" is bikesheddable; we have two groups of callbacks - do something for everything in directory, until we run into problem and find an entry in directory and do something to it. The former tended to use 0/-E... conventions - -E<something> on failure. The latter tended to use 0/1, 1 being "stop, we are done". The callers treated anything non-zero as "stop", ignoring which non-zero value did they get. "true means stop" would be more natural for the second group; "true means keep going" - for the first one. I tried both variants and the things like if allocation failed something = -ENOMEM; return true; just looked unnatural and asking for trouble. [folded suggestion from Matthew Wilcox <willy@infradead.org>] Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1899 lines
44 KiB
C
1899 lines
44 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
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* Copyright (C) 2018 Samsung Electronics Co., Ltd.
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*/
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/uaccess.h>
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#include <linux/backing-dev.h>
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#include <linux/writeback.h>
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#include <linux/xattr.h>
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#include <linux/falloc.h>
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#include <linux/fsnotify.h>
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#include <linux/dcache.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/sched/xacct.h>
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#include <linux/crc32c.h>
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#include "../internal.h" /* for vfs_path_lookup */
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#include "glob.h"
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#include "oplock.h"
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#include "connection.h"
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#include "vfs.h"
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#include "vfs_cache.h"
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#include "smbacl.h"
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#include "ndr.h"
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#include "auth.h"
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#include "misc.h"
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#include "smb_common.h"
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#include "mgmt/share_config.h"
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#include "mgmt/tree_connect.h"
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#include "mgmt/user_session.h"
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#include "mgmt/user_config.h"
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static char *extract_last_component(char *path)
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{
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char *p = strrchr(path, '/');
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if (p && p[1] != '\0') {
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*p = '\0';
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p++;
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} else {
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p = NULL;
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}
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return p;
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}
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static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work,
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struct inode *parent_inode,
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struct inode *inode)
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{
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if (!test_share_config_flag(work->tcon->share_conf,
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KSMBD_SHARE_FLAG_INHERIT_OWNER))
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return;
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i_uid_write(inode, i_uid_read(parent_inode));
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}
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/**
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* ksmbd_vfs_lock_parent() - lock parent dentry if it is stable
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*
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* the parent dentry got by dget_parent or @parent could be
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* unstable, we try to lock a parent inode and lookup the
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* child dentry again.
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*
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* the reference count of @parent isn't incremented.
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*/
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int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent,
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struct dentry *child)
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{
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struct dentry *dentry;
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int ret = 0;
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inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
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dentry = lookup_one(user_ns, child->d_name.name, parent,
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child->d_name.len);
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if (IS_ERR(dentry)) {
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ret = PTR_ERR(dentry);
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goto out_err;
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}
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if (dentry != child) {
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ret = -ESTALE;
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dput(dentry);
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goto out_err;
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}
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dput(dentry);
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return 0;
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out_err:
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inode_unlock(d_inode(parent));
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return ret;
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}
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int ksmbd_vfs_may_delete(struct user_namespace *user_ns,
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struct dentry *dentry)
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{
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struct dentry *parent;
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int ret;
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parent = dget_parent(dentry);
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ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
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if (ret) {
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dput(parent);
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return ret;
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}
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ret = inode_permission(user_ns, d_inode(parent),
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MAY_EXEC | MAY_WRITE);
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inode_unlock(d_inode(parent));
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dput(parent);
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return ret;
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}
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int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
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struct dentry *dentry, __le32 *daccess)
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{
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struct dentry *parent;
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int ret = 0;
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*daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL);
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if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_WRITE))
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*daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE |
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FILE_WRITE_DATA | FILE_APPEND_DATA |
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FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES |
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FILE_DELETE_CHILD);
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if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_READ))
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*daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE;
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if (!inode_permission(user_ns, d_inode(dentry), MAY_OPEN | MAY_EXEC))
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*daccess |= FILE_EXECUTE_LE;
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parent = dget_parent(dentry);
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ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
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if (ret) {
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dput(parent);
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return ret;
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}
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if (!inode_permission(user_ns, d_inode(parent), MAY_EXEC | MAY_WRITE))
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*daccess |= FILE_DELETE_LE;
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inode_unlock(d_inode(parent));
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dput(parent);
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return ret;
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}
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/**
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* ksmbd_vfs_create() - vfs helper for smb create file
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* @work: work
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* @name: file name that is relative to share
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* @mode: file create mode
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*
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* Return: 0 on success, otherwise error
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*/
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int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode)
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{
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struct path path;
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struct dentry *dentry;
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int err;
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dentry = ksmbd_vfs_kern_path_create(work, name,
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LOOKUP_NO_SYMLINKS, &path);
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if (IS_ERR(dentry)) {
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err = PTR_ERR(dentry);
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if (err != -ENOENT)
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pr_err("path create failed for %s, err %d\n",
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name, err);
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return err;
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}
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mode |= S_IFREG;
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err = vfs_create(mnt_user_ns(path.mnt), d_inode(path.dentry),
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dentry, mode, true);
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if (!err) {
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ksmbd_vfs_inherit_owner(work, d_inode(path.dentry),
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d_inode(dentry));
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} else {
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pr_err("File(%s): creation failed (err:%d)\n", name, err);
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}
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done_path_create(&path, dentry);
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return err;
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}
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/**
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* ksmbd_vfs_mkdir() - vfs helper for smb create directory
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* @work: work
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* @name: directory name that is relative to share
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* @mode: directory create mode
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*
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* Return: 0 on success, otherwise error
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*/
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int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode)
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{
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struct user_namespace *user_ns;
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struct path path;
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struct dentry *dentry;
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int err;
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dentry = ksmbd_vfs_kern_path_create(work, name,
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LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
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&path);
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if (IS_ERR(dentry)) {
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err = PTR_ERR(dentry);
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if (err != -EEXIST)
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ksmbd_debug(VFS, "path create failed for %s, err %d\n",
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name, err);
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return err;
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}
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user_ns = mnt_user_ns(path.mnt);
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mode |= S_IFDIR;
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err = vfs_mkdir(user_ns, d_inode(path.dentry), dentry, mode);
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if (err) {
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goto out;
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} else if (d_unhashed(dentry)) {
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struct dentry *d;
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d = lookup_one(user_ns, dentry->d_name.name, dentry->d_parent,
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dentry->d_name.len);
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if (IS_ERR(d)) {
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err = PTR_ERR(d);
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goto out;
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}
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if (unlikely(d_is_negative(d))) {
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dput(d);
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err = -ENOENT;
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goto out;
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}
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ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d));
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dput(d);
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}
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out:
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done_path_create(&path, dentry);
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if (err)
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pr_err("mkdir(%s): creation failed (err:%d)\n", name, err);
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return err;
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}
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static ssize_t ksmbd_vfs_getcasexattr(struct user_namespace *user_ns,
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struct dentry *dentry, char *attr_name,
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int attr_name_len, char **attr_value)
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{
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char *name, *xattr_list = NULL;
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ssize_t value_len = -ENOENT, xattr_list_len;
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xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
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if (xattr_list_len <= 0)
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goto out;
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for (name = xattr_list; name - xattr_list < xattr_list_len;
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name += strlen(name) + 1) {
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ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));
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if (strncasecmp(attr_name, name, attr_name_len))
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continue;
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value_len = ksmbd_vfs_getxattr(user_ns,
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dentry,
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name,
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attr_value);
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if (value_len < 0)
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pr_err("failed to get xattr in file\n");
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break;
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}
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out:
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kvfree(xattr_list);
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return value_len;
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}
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static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos,
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size_t count)
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{
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ssize_t v_len;
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char *stream_buf = NULL;
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ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n",
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*pos, count);
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v_len = ksmbd_vfs_getcasexattr(file_mnt_user_ns(fp->filp),
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fp->filp->f_path.dentry,
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fp->stream.name,
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fp->stream.size,
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&stream_buf);
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if ((int)v_len <= 0)
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return (int)v_len;
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if (v_len <= *pos) {
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count = -EINVAL;
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goto free_buf;
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}
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if (v_len - *pos < count)
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count = v_len - *pos;
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memcpy(buf, &stream_buf[*pos], count);
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free_buf:
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kvfree(stream_buf);
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return count;
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}
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/**
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* check_lock_range() - vfs helper for smb byte range file locking
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* @filp: the file to apply the lock to
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* @start: lock start byte offset
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* @end: lock end byte offset
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* @type: byte range type read/write
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*
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* Return: 0 on success, otherwise error
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*/
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static int check_lock_range(struct file *filp, loff_t start, loff_t end,
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unsigned char type)
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{
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struct file_lock *flock;
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struct file_lock_context *ctx = file_inode(filp)->i_flctx;
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int error = 0;
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if (!ctx || list_empty_careful(&ctx->flc_posix))
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return 0;
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spin_lock(&ctx->flc_lock);
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list_for_each_entry(flock, &ctx->flc_posix, fl_list) {
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/* check conflict locks */
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if (flock->fl_end >= start && end >= flock->fl_start) {
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if (flock->fl_type == F_RDLCK) {
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if (type == WRITE) {
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pr_err("not allow write by shared lock\n");
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error = 1;
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goto out;
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}
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} else if (flock->fl_type == F_WRLCK) {
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/* check owner in lock */
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if (flock->fl_file != filp) {
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error = 1;
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pr_err("not allow rw access by exclusive lock from other opens\n");
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goto out;
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}
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}
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}
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}
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out:
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spin_unlock(&ctx->flc_lock);
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return error;
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}
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/**
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* ksmbd_vfs_read() - vfs helper for smb file read
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* @work: smb work
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* @fid: file id of open file
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* @count: read byte count
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* @pos: file pos
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*
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* Return: number of read bytes on success, otherwise error
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*/
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int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,
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loff_t *pos)
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{
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struct file *filp = fp->filp;
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ssize_t nbytes = 0;
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char *rbuf = work->aux_payload_buf;
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struct inode *inode = file_inode(filp);
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if (S_ISDIR(inode->i_mode))
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return -EISDIR;
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if (unlikely(count == 0))
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return 0;
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if (work->conn->connection_type) {
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if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {
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pr_err("no right to read(%pd)\n",
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fp->filp->f_path.dentry);
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return -EACCES;
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}
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}
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if (ksmbd_stream_fd(fp))
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return ksmbd_vfs_stream_read(fp, rbuf, pos, count);
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if (!work->tcon->posix_extensions) {
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int ret;
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ret = check_lock_range(filp, *pos, *pos + count - 1, READ);
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if (ret) {
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pr_err("unable to read due to lock\n");
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return -EAGAIN;
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}
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}
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nbytes = kernel_read(filp, rbuf, count, pos);
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if (nbytes < 0) {
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pr_err("smb read failed, err = %zd\n", nbytes);
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return nbytes;
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}
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filp->f_pos = *pos;
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return nbytes;
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}
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static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos,
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size_t count)
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{
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char *stream_buf = NULL, *wbuf;
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struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
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size_t size, v_len;
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int err = 0;
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ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n",
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*pos, count);
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size = *pos + count;
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if (size > XATTR_SIZE_MAX) {
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size = XATTR_SIZE_MAX;
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count = (*pos + count) - XATTR_SIZE_MAX;
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}
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v_len = ksmbd_vfs_getcasexattr(user_ns,
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fp->filp->f_path.dentry,
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fp->stream.name,
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fp->stream.size,
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&stream_buf);
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if ((int)v_len < 0) {
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pr_err("not found stream in xattr : %zd\n", v_len);
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err = (int)v_len;
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goto out;
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}
|
|
|
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if (v_len < size) {
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wbuf = kvmalloc(size, GFP_KERNEL | __GFP_ZERO);
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if (!wbuf) {
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err = -ENOMEM;
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goto out;
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}
|
|
|
|
if (v_len > 0)
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|
memcpy(wbuf, stream_buf, v_len);
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kvfree(stream_buf);
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stream_buf = wbuf;
|
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}
|
|
|
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memcpy(&stream_buf[*pos], buf, count);
|
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|
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err = ksmbd_vfs_setxattr(user_ns,
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fp->filp->f_path.dentry,
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fp->stream.name,
|
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(void *)stream_buf,
|
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size,
|
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0);
|
|
if (err < 0)
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|
goto out;
|
|
|
|
fp->filp->f_pos = *pos;
|
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err = 0;
|
|
out:
|
|
kvfree(stream_buf);
|
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return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_write() - vfs helper for smb file write
|
|
* @work: work
|
|
* @fid: file id of open file
|
|
* @buf: buf containing data for writing
|
|
* @count: read byte count
|
|
* @pos: file pos
|
|
* @sync: fsync after write
|
|
* @written: number of bytes written
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
|
|
char *buf, size_t count, loff_t *pos, bool sync,
|
|
ssize_t *written)
|
|
{
|
|
struct file *filp;
|
|
loff_t offset = *pos;
|
|
int err = 0;
|
|
|
|
if (work->conn->connection_type) {
|
|
if (!(fp->daccess & FILE_WRITE_DATA_LE)) {
|
|
pr_err("no right to write(%pd)\n",
|
|
fp->filp->f_path.dentry);
|
|
err = -EACCES;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
filp = fp->filp;
|
|
|
|
if (ksmbd_stream_fd(fp)) {
|
|
err = ksmbd_vfs_stream_write(fp, buf, pos, count);
|
|
if (!err)
|
|
*written = count;
|
|
goto out;
|
|
}
|
|
|
|
if (!work->tcon->posix_extensions) {
|
|
err = check_lock_range(filp, *pos, *pos + count - 1, WRITE);
|
|
if (err) {
|
|
pr_err("unable to write due to lock\n");
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Do we need to break any of a levelII oplock? */
|
|
smb_break_all_levII_oplock(work, fp, 1);
|
|
|
|
err = kernel_write(filp, buf, count, pos);
|
|
if (err < 0) {
|
|
ksmbd_debug(VFS, "smb write failed, err = %d\n", err);
|
|
goto out;
|
|
}
|
|
|
|
filp->f_pos = *pos;
|
|
*written = err;
|
|
err = 0;
|
|
if (sync) {
|
|
err = vfs_fsync_range(filp, offset, offset + *written, 0);
|
|
if (err < 0)
|
|
pr_err("fsync failed for filename = %pd, err = %d\n",
|
|
fp->filp->f_path.dentry, err);
|
|
}
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_getattr() - vfs helper for smb getattr
|
|
* @work: work
|
|
* @fid: file id of open file
|
|
* @attrs: inode attributes
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_getattr(struct path *path, struct kstat *stat)
|
|
{
|
|
int err;
|
|
|
|
err = vfs_getattr(path, stat, STATX_BTIME, AT_STATX_SYNC_AS_STAT);
|
|
if (err)
|
|
pr_err("getattr failed, err %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_fsync() - vfs helper for smb fsync
|
|
* @work: work
|
|
* @fid: file id of open file
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id)
|
|
{
|
|
struct ksmbd_file *fp;
|
|
int err;
|
|
|
|
fp = ksmbd_lookup_fd_slow(work, fid, p_id);
|
|
if (!fp) {
|
|
pr_err("failed to get filp for fid %llu\n", fid);
|
|
return -ENOENT;
|
|
}
|
|
err = vfs_fsync(fp->filp, 0);
|
|
if (err < 0)
|
|
pr_err("smb fsync failed, err = %d\n", err);
|
|
ksmbd_fd_put(work, fp);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_remove_file() - vfs helper for smb rmdir or unlink
|
|
* @name: directory or file name that is relative to share
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name)
|
|
{
|
|
struct user_namespace *user_ns;
|
|
struct path path;
|
|
struct dentry *parent;
|
|
int err;
|
|
|
|
if (ksmbd_override_fsids(work))
|
|
return -ENOMEM;
|
|
|
|
err = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, false);
|
|
if (err) {
|
|
ksmbd_debug(VFS, "can't get %s, err %d\n", name, err);
|
|
ksmbd_revert_fsids(work);
|
|
return err;
|
|
}
|
|
|
|
user_ns = mnt_user_ns(path.mnt);
|
|
parent = dget_parent(path.dentry);
|
|
err = ksmbd_vfs_lock_parent(user_ns, parent, path.dentry);
|
|
if (err) {
|
|
dput(parent);
|
|
path_put(&path);
|
|
ksmbd_revert_fsids(work);
|
|
return err;
|
|
}
|
|
|
|
if (!d_inode(path.dentry)->i_nlink) {
|
|
err = -ENOENT;
|
|
goto out_err;
|
|
}
|
|
|
|
if (S_ISDIR(d_inode(path.dentry)->i_mode)) {
|
|
err = vfs_rmdir(user_ns, d_inode(parent), path.dentry);
|
|
if (err && err != -ENOTEMPTY)
|
|
ksmbd_debug(VFS, "%s: rmdir failed, err %d\n", name,
|
|
err);
|
|
} else {
|
|
err = vfs_unlink(user_ns, d_inode(parent), path.dentry, NULL);
|
|
if (err)
|
|
ksmbd_debug(VFS, "%s: unlink failed, err %d\n", name,
|
|
err);
|
|
}
|
|
|
|
out_err:
|
|
inode_unlock(d_inode(parent));
|
|
dput(parent);
|
|
path_put(&path);
|
|
ksmbd_revert_fsids(work);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_link() - vfs helper for creating smb hardlink
|
|
* @oldname: source file name
|
|
* @newname: hardlink name that is relative to share
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_link(struct ksmbd_work *work, const char *oldname,
|
|
const char *newname)
|
|
{
|
|
struct path oldpath, newpath;
|
|
struct dentry *dentry;
|
|
int err;
|
|
|
|
if (ksmbd_override_fsids(work))
|
|
return -ENOMEM;
|
|
|
|
err = kern_path(oldname, LOOKUP_NO_SYMLINKS, &oldpath);
|
|
if (err) {
|
|
pr_err("cannot get linux path for %s, err = %d\n",
|
|
oldname, err);
|
|
goto out1;
|
|
}
|
|
|
|
dentry = ksmbd_vfs_kern_path_create(work, newname,
|
|
LOOKUP_NO_SYMLINKS | LOOKUP_REVAL,
|
|
&newpath);
|
|
if (IS_ERR(dentry)) {
|
|
err = PTR_ERR(dentry);
|
|
pr_err("path create err for %s, err %d\n", newname, err);
|
|
goto out2;
|
|
}
|
|
|
|
err = -EXDEV;
|
|
if (oldpath.mnt != newpath.mnt) {
|
|
pr_err("vfs_link failed err %d\n", err);
|
|
goto out3;
|
|
}
|
|
|
|
err = vfs_link(oldpath.dentry, mnt_user_ns(newpath.mnt),
|
|
d_inode(newpath.dentry),
|
|
dentry, NULL);
|
|
if (err)
|
|
ksmbd_debug(VFS, "vfs_link failed err %d\n", err);
|
|
|
|
out3:
|
|
done_path_create(&newpath, dentry);
|
|
out2:
|
|
path_put(&oldpath);
|
|
out1:
|
|
ksmbd_revert_fsids(work);
|
|
return err;
|
|
}
|
|
|
|
static int ksmbd_validate_entry_in_use(struct dentry *src_dent)
|
|
{
|
|
struct dentry *dst_dent;
|
|
|
|
spin_lock(&src_dent->d_lock);
|
|
list_for_each_entry(dst_dent, &src_dent->d_subdirs, d_child) {
|
|
struct ksmbd_file *child_fp;
|
|
|
|
if (d_really_is_negative(dst_dent))
|
|
continue;
|
|
|
|
child_fp = ksmbd_lookup_fd_inode(d_inode(dst_dent));
|
|
if (child_fp) {
|
|
spin_unlock(&src_dent->d_lock);
|
|
ksmbd_debug(VFS, "Forbid rename, sub file/dir is in use\n");
|
|
return -EACCES;
|
|
}
|
|
}
|
|
spin_unlock(&src_dent->d_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __ksmbd_vfs_rename(struct ksmbd_work *work,
|
|
struct user_namespace *src_user_ns,
|
|
struct dentry *src_dent_parent,
|
|
struct dentry *src_dent,
|
|
struct user_namespace *dst_user_ns,
|
|
struct dentry *dst_dent_parent,
|
|
struct dentry *trap_dent,
|
|
char *dst_name)
|
|
{
|
|
struct dentry *dst_dent;
|
|
int err;
|
|
|
|
if (!work->tcon->posix_extensions) {
|
|
err = ksmbd_validate_entry_in_use(src_dent);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (d_really_is_negative(src_dent_parent))
|
|
return -ENOENT;
|
|
if (d_really_is_negative(dst_dent_parent))
|
|
return -ENOENT;
|
|
if (d_really_is_negative(src_dent))
|
|
return -ENOENT;
|
|
if (src_dent == trap_dent)
|
|
return -EINVAL;
|
|
|
|
if (ksmbd_override_fsids(work))
|
|
return -ENOMEM;
|
|
|
|
dst_dent = lookup_one(dst_user_ns, dst_name, dst_dent_parent,
|
|
strlen(dst_name));
|
|
err = PTR_ERR(dst_dent);
|
|
if (IS_ERR(dst_dent)) {
|
|
pr_err("lookup failed %s [%d]\n", dst_name, err);
|
|
goto out;
|
|
}
|
|
|
|
err = -ENOTEMPTY;
|
|
if (dst_dent != trap_dent && !d_really_is_positive(dst_dent)) {
|
|
struct renamedata rd = {
|
|
.old_mnt_userns = src_user_ns,
|
|
.old_dir = d_inode(src_dent_parent),
|
|
.old_dentry = src_dent,
|
|
.new_mnt_userns = dst_user_ns,
|
|
.new_dir = d_inode(dst_dent_parent),
|
|
.new_dentry = dst_dent,
|
|
};
|
|
err = vfs_rename(&rd);
|
|
}
|
|
if (err)
|
|
pr_err("vfs_rename failed err %d\n", err);
|
|
if (dst_dent)
|
|
dput(dst_dent);
|
|
out:
|
|
ksmbd_revert_fsids(work);
|
|
return err;
|
|
}
|
|
|
|
int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
|
|
char *newname)
|
|
{
|
|
struct user_namespace *user_ns;
|
|
struct path dst_path;
|
|
struct dentry *src_dent_parent, *dst_dent_parent;
|
|
struct dentry *src_dent, *trap_dent, *src_child;
|
|
char *dst_name;
|
|
int err;
|
|
|
|
dst_name = extract_last_component(newname);
|
|
if (!dst_name) {
|
|
dst_name = newname;
|
|
newname = "";
|
|
}
|
|
|
|
src_dent_parent = dget_parent(fp->filp->f_path.dentry);
|
|
src_dent = fp->filp->f_path.dentry;
|
|
|
|
err = ksmbd_vfs_kern_path(work, newname,
|
|
LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY,
|
|
&dst_path, false);
|
|
if (err) {
|
|
ksmbd_debug(VFS, "Cannot get path for %s [%d]\n", newname, err);
|
|
goto out;
|
|
}
|
|
dst_dent_parent = dst_path.dentry;
|
|
|
|
trap_dent = lock_rename(src_dent_parent, dst_dent_parent);
|
|
dget(src_dent);
|
|
dget(dst_dent_parent);
|
|
user_ns = file_mnt_user_ns(fp->filp);
|
|
src_child = lookup_one(user_ns, src_dent->d_name.name, src_dent_parent,
|
|
src_dent->d_name.len);
|
|
if (IS_ERR(src_child)) {
|
|
err = PTR_ERR(src_child);
|
|
goto out_lock;
|
|
}
|
|
|
|
if (src_child != src_dent) {
|
|
err = -ESTALE;
|
|
dput(src_child);
|
|
goto out_lock;
|
|
}
|
|
dput(src_child);
|
|
|
|
err = __ksmbd_vfs_rename(work,
|
|
user_ns,
|
|
src_dent_parent,
|
|
src_dent,
|
|
mnt_user_ns(dst_path.mnt),
|
|
dst_dent_parent,
|
|
trap_dent,
|
|
dst_name);
|
|
out_lock:
|
|
dput(src_dent);
|
|
dput(dst_dent_parent);
|
|
unlock_rename(src_dent_parent, dst_dent_parent);
|
|
path_put(&dst_path);
|
|
out:
|
|
dput(src_dent_parent);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_truncate() - vfs helper for smb file truncate
|
|
* @work: work
|
|
* @fid: file id of old file
|
|
* @size: truncate to given size
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_truncate(struct ksmbd_work *work,
|
|
struct ksmbd_file *fp, loff_t size)
|
|
{
|
|
int err = 0;
|
|
struct file *filp;
|
|
|
|
filp = fp->filp;
|
|
|
|
/* Do we need to break any of a levelII oplock? */
|
|
smb_break_all_levII_oplock(work, fp, 1);
|
|
|
|
if (!work->tcon->posix_extensions) {
|
|
struct inode *inode = file_inode(filp);
|
|
|
|
if (size < inode->i_size) {
|
|
err = check_lock_range(filp, size,
|
|
inode->i_size - 1, WRITE);
|
|
} else {
|
|
err = check_lock_range(filp, inode->i_size,
|
|
size - 1, WRITE);
|
|
}
|
|
|
|
if (err) {
|
|
pr_err("failed due to lock\n");
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
|
|
err = vfs_truncate(&filp->f_path, size);
|
|
if (err)
|
|
pr_err("truncate failed, err %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_listxattr() - vfs helper for smb list extended attributes
|
|
* @dentry: dentry of file for listing xattrs
|
|
* @list: destination buffer
|
|
* @size: destination buffer length
|
|
*
|
|
* Return: xattr list length on success, otherwise error
|
|
*/
|
|
ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list)
|
|
{
|
|
ssize_t size;
|
|
char *vlist = NULL;
|
|
|
|
size = vfs_listxattr(dentry, NULL, 0);
|
|
if (size <= 0)
|
|
return size;
|
|
|
|
vlist = kvmalloc(size, GFP_KERNEL | __GFP_ZERO);
|
|
if (!vlist)
|
|
return -ENOMEM;
|
|
|
|
*list = vlist;
|
|
size = vfs_listxattr(dentry, vlist, size);
|
|
if (size < 0) {
|
|
ksmbd_debug(VFS, "listxattr failed\n");
|
|
kvfree(vlist);
|
|
*list = NULL;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
static ssize_t ksmbd_vfs_xattr_len(struct user_namespace *user_ns,
|
|
struct dentry *dentry, char *xattr_name)
|
|
{
|
|
return vfs_getxattr(user_ns, dentry, xattr_name, NULL, 0);
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value
|
|
* @user_ns: user namespace
|
|
* @dentry: dentry of file for getting xattrs
|
|
* @xattr_name: name of xattr name to query
|
|
* @xattr_buf: destination buffer xattr value
|
|
*
|
|
* Return: read xattr value length on success, otherwise error
|
|
*/
|
|
ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns,
|
|
struct dentry *dentry,
|
|
char *xattr_name, char **xattr_buf)
|
|
{
|
|
ssize_t xattr_len;
|
|
char *buf;
|
|
|
|
*xattr_buf = NULL;
|
|
xattr_len = ksmbd_vfs_xattr_len(user_ns, dentry, xattr_name);
|
|
if (xattr_len < 0)
|
|
return xattr_len;
|
|
|
|
buf = kmalloc(xattr_len + 1, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
xattr_len = vfs_getxattr(user_ns, dentry, xattr_name,
|
|
(void *)buf, xattr_len);
|
|
if (xattr_len > 0)
|
|
*xattr_buf = buf;
|
|
else
|
|
kfree(buf);
|
|
return xattr_len;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_setxattr() - vfs helper for smb set extended attributes value
|
|
* @user_ns: user namespace
|
|
* @dentry: dentry to set XATTR at
|
|
* @name: xattr name for setxattr
|
|
* @value: xattr value to set
|
|
* @size: size of xattr value
|
|
* @flags: destination buffer length
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_setxattr(struct user_namespace *user_ns,
|
|
struct dentry *dentry, const char *attr_name,
|
|
void *attr_value, size_t attr_size, int flags)
|
|
{
|
|
int err;
|
|
|
|
err = vfs_setxattr(user_ns,
|
|
dentry,
|
|
attr_name,
|
|
attr_value,
|
|
attr_size,
|
|
flags);
|
|
if (err)
|
|
ksmbd_debug(VFS, "setxattr failed, err %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_set_fadvise() - convert smb IO caching options to linux options
|
|
* @filp: file pointer for IO
|
|
* @options: smb IO options
|
|
*/
|
|
void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option)
|
|
{
|
|
struct address_space *mapping;
|
|
|
|
mapping = filp->f_mapping;
|
|
|
|
if (!option || !mapping)
|
|
return;
|
|
|
|
if (option & FILE_WRITE_THROUGH_LE) {
|
|
filp->f_flags |= O_SYNC;
|
|
} else if (option & FILE_SEQUENTIAL_ONLY_LE) {
|
|
filp->f_ra.ra_pages = inode_to_bdi(mapping->host)->ra_pages * 2;
|
|
spin_lock(&filp->f_lock);
|
|
filp->f_mode &= ~FMODE_RANDOM;
|
|
spin_unlock(&filp->f_lock);
|
|
} else if (option & FILE_RANDOM_ACCESS_LE) {
|
|
spin_lock(&filp->f_lock);
|
|
filp->f_mode |= FMODE_RANDOM;
|
|
spin_unlock(&filp->f_lock);
|
|
}
|
|
}
|
|
|
|
int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
|
|
loff_t off, loff_t len)
|
|
{
|
|
smb_break_all_levII_oplock(work, fp, 1);
|
|
if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE)
|
|
return vfs_fallocate(fp->filp,
|
|
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
|
|
off, len);
|
|
|
|
return vfs_fallocate(fp->filp,
|
|
FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE,
|
|
off, len);
|
|
}
|
|
|
|
int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
|
|
struct file_allocated_range_buffer *ranges,
|
|
unsigned int in_count, unsigned int *out_count)
|
|
{
|
|
struct file *f = fp->filp;
|
|
struct inode *inode = file_inode(fp->filp);
|
|
loff_t maxbytes = (u64)inode->i_sb->s_maxbytes, end;
|
|
loff_t extent_start, extent_end;
|
|
int ret = 0;
|
|
|
|
if (start > maxbytes)
|
|
return -EFBIG;
|
|
|
|
if (!in_count)
|
|
return 0;
|
|
|
|
/*
|
|
* Shrink request scope to what the fs can actually handle.
|
|
*/
|
|
if (length > maxbytes || (maxbytes - length) < start)
|
|
length = maxbytes - start;
|
|
|
|
if (start + length > inode->i_size)
|
|
length = inode->i_size - start;
|
|
|
|
*out_count = 0;
|
|
end = start + length;
|
|
while (start < end && *out_count < in_count) {
|
|
extent_start = vfs_llseek(f, start, SEEK_DATA);
|
|
if (extent_start < 0) {
|
|
if (extent_start != -ENXIO)
|
|
ret = (int)extent_start;
|
|
break;
|
|
}
|
|
|
|
if (extent_start >= end)
|
|
break;
|
|
|
|
extent_end = vfs_llseek(f, extent_start, SEEK_HOLE);
|
|
if (extent_end < 0) {
|
|
if (extent_end != -ENXIO)
|
|
ret = (int)extent_end;
|
|
break;
|
|
} else if (extent_start >= extent_end) {
|
|
break;
|
|
}
|
|
|
|
ranges[*out_count].file_offset = cpu_to_le64(extent_start);
|
|
ranges[(*out_count)++].length =
|
|
cpu_to_le64(min(extent_end, end) - extent_start);
|
|
|
|
start = extent_end;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns,
|
|
struct dentry *dentry, char *attr_name)
|
|
{
|
|
return vfs_removexattr(user_ns, dentry, attr_name);
|
|
}
|
|
|
|
int ksmbd_vfs_unlink(struct user_namespace *user_ns,
|
|
struct dentry *dir, struct dentry *dentry)
|
|
{
|
|
int err = 0;
|
|
|
|
err = ksmbd_vfs_lock_parent(user_ns, dir, dentry);
|
|
if (err)
|
|
return err;
|
|
dget(dentry);
|
|
|
|
if (S_ISDIR(d_inode(dentry)->i_mode))
|
|
err = vfs_rmdir(user_ns, d_inode(dir), dentry);
|
|
else
|
|
err = vfs_unlink(user_ns, d_inode(dir), dentry, NULL);
|
|
|
|
dput(dentry);
|
|
inode_unlock(d_inode(dir));
|
|
if (err)
|
|
ksmbd_debug(VFS, "failed to delete, err %d\n", err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static bool __dir_empty(struct dir_context *ctx, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
struct ksmbd_readdir_data *buf;
|
|
|
|
buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
|
|
buf->dirent_count++;
|
|
|
|
return buf->dirent_count <= 2;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_empty_dir() - check for empty directory
|
|
* @fp: ksmbd file pointer
|
|
*
|
|
* Return: true if directory empty, otherwise false
|
|
*/
|
|
int ksmbd_vfs_empty_dir(struct ksmbd_file *fp)
|
|
{
|
|
int err;
|
|
struct ksmbd_readdir_data readdir_data;
|
|
|
|
memset(&readdir_data, 0, sizeof(struct ksmbd_readdir_data));
|
|
|
|
set_ctx_actor(&readdir_data.ctx, __dir_empty);
|
|
readdir_data.dirent_count = 0;
|
|
|
|
err = iterate_dir(fp->filp, &readdir_data.ctx);
|
|
if (readdir_data.dirent_count > 2)
|
|
err = -ENOTEMPTY;
|
|
else
|
|
err = 0;
|
|
return err;
|
|
}
|
|
|
|
static bool __caseless_lookup(struct dir_context *ctx, const char *name,
|
|
int namlen, loff_t offset, u64 ino,
|
|
unsigned int d_type)
|
|
{
|
|
struct ksmbd_readdir_data *buf;
|
|
|
|
buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
|
|
|
|
if (buf->used != namlen)
|
|
return true;
|
|
if (!strncasecmp((char *)buf->private, name, namlen)) {
|
|
memcpy((char *)buf->private, name, namlen);
|
|
buf->dirent_count = 1;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_lookup_in_dir() - lookup a file in a directory
|
|
* @dir: path info
|
|
* @name: filename to lookup
|
|
* @namelen: filename length
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
static int ksmbd_vfs_lookup_in_dir(struct path *dir, char *name, size_t namelen)
|
|
{
|
|
int ret;
|
|
struct file *dfilp;
|
|
int flags = O_RDONLY | O_LARGEFILE;
|
|
struct ksmbd_readdir_data readdir_data = {
|
|
.ctx.actor = __caseless_lookup,
|
|
.private = name,
|
|
.used = namelen,
|
|
.dirent_count = 0,
|
|
};
|
|
|
|
dfilp = dentry_open(dir, flags, current_cred());
|
|
if (IS_ERR(dfilp))
|
|
return PTR_ERR(dfilp);
|
|
|
|
ret = iterate_dir(dfilp, &readdir_data.ctx);
|
|
if (readdir_data.dirent_count > 0)
|
|
ret = 0;
|
|
fput(dfilp);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_kern_path() - lookup a file and get path info
|
|
* @name: file path that is relative to share
|
|
* @flags: lookup flags
|
|
* @path: if lookup succeed, return path info
|
|
* @caseless: caseless filename lookup
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int ksmbd_vfs_kern_path(struct ksmbd_work *work, char *name,
|
|
unsigned int flags, struct path *path, bool caseless)
|
|
{
|
|
struct ksmbd_share_config *share_conf = work->tcon->share_conf;
|
|
int err;
|
|
|
|
flags |= LOOKUP_BENEATH;
|
|
err = vfs_path_lookup(share_conf->vfs_path.dentry,
|
|
share_conf->vfs_path.mnt,
|
|
name,
|
|
flags,
|
|
path);
|
|
if (!err)
|
|
return 0;
|
|
|
|
if (caseless) {
|
|
char *filepath;
|
|
struct path parent;
|
|
size_t path_len, remain_len;
|
|
|
|
filepath = kstrdup(name, GFP_KERNEL);
|
|
if (!filepath)
|
|
return -ENOMEM;
|
|
|
|
path_len = strlen(filepath);
|
|
remain_len = path_len;
|
|
|
|
parent = share_conf->vfs_path;
|
|
path_get(&parent);
|
|
|
|
while (d_can_lookup(parent.dentry)) {
|
|
char *filename = filepath + path_len - remain_len;
|
|
char *next = strchrnul(filename, '/');
|
|
size_t filename_len = next - filename;
|
|
bool is_last = !next[0];
|
|
|
|
if (filename_len == 0)
|
|
break;
|
|
|
|
err = ksmbd_vfs_lookup_in_dir(&parent, filename,
|
|
filename_len);
|
|
path_put(&parent);
|
|
if (err)
|
|
goto out;
|
|
|
|
next[0] = '\0';
|
|
|
|
err = vfs_path_lookup(share_conf->vfs_path.dentry,
|
|
share_conf->vfs_path.mnt,
|
|
filepath,
|
|
flags,
|
|
&parent);
|
|
if (err)
|
|
goto out;
|
|
else if (is_last) {
|
|
*path = parent;
|
|
goto out;
|
|
}
|
|
|
|
next[0] = '/';
|
|
remain_len -= filename_len + 1;
|
|
}
|
|
|
|
path_put(&parent);
|
|
err = -EINVAL;
|
|
out:
|
|
kfree(filepath);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
|
|
const char *name,
|
|
unsigned int flags,
|
|
struct path *path)
|
|
{
|
|
char *abs_name;
|
|
struct dentry *dent;
|
|
|
|
abs_name = convert_to_unix_name(work->tcon->share_conf, name);
|
|
if (!abs_name)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
dent = kern_path_create(AT_FDCWD, abs_name, path, flags);
|
|
kfree(abs_name);
|
|
return dent;
|
|
}
|
|
|
|
int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns,
|
|
struct dentry *dentry)
|
|
{
|
|
char *name, *xattr_list = NULL;
|
|
ssize_t xattr_list_len;
|
|
int err = 0;
|
|
|
|
xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
|
|
if (xattr_list_len < 0) {
|
|
goto out;
|
|
} else if (!xattr_list_len) {
|
|
ksmbd_debug(SMB, "empty xattr in the file\n");
|
|
goto out;
|
|
}
|
|
|
|
for (name = xattr_list; name - xattr_list < xattr_list_len;
|
|
name += strlen(name) + 1) {
|
|
ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
|
|
|
|
if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
|
|
sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1) ||
|
|
!strncmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
|
|
sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1)) {
|
|
err = ksmbd_vfs_remove_xattr(user_ns, dentry, name);
|
|
if (err)
|
|
ksmbd_debug(SMB,
|
|
"remove acl xattr failed : %s\n", name);
|
|
}
|
|
}
|
|
out:
|
|
kvfree(xattr_list);
|
|
return err;
|
|
}
|
|
|
|
int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns,
|
|
struct dentry *dentry)
|
|
{
|
|
char *name, *xattr_list = NULL;
|
|
ssize_t xattr_list_len;
|
|
int err = 0;
|
|
|
|
xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
|
|
if (xattr_list_len < 0) {
|
|
goto out;
|
|
} else if (!xattr_list_len) {
|
|
ksmbd_debug(SMB, "empty xattr in the file\n");
|
|
goto out;
|
|
}
|
|
|
|
for (name = xattr_list; name - xattr_list < xattr_list_len;
|
|
name += strlen(name) + 1) {
|
|
ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
|
|
|
|
if (!strncmp(name, XATTR_NAME_SD, XATTR_NAME_SD_LEN)) {
|
|
err = ksmbd_vfs_remove_xattr(user_ns, dentry, name);
|
|
if (err)
|
|
ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
|
|
}
|
|
}
|
|
out:
|
|
kvfree(xattr_list);
|
|
return err;
|
|
}
|
|
|
|
static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespace *user_ns,
|
|
struct inode *inode,
|
|
int acl_type)
|
|
{
|
|
struct xattr_smb_acl *smb_acl = NULL;
|
|
struct posix_acl *posix_acls;
|
|
struct posix_acl_entry *pa_entry;
|
|
struct xattr_acl_entry *xa_entry;
|
|
int i;
|
|
|
|
if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
|
|
return NULL;
|
|
|
|
posix_acls = get_acl(inode, acl_type);
|
|
if (!posix_acls)
|
|
return NULL;
|
|
|
|
smb_acl = kzalloc(sizeof(struct xattr_smb_acl) +
|
|
sizeof(struct xattr_acl_entry) * posix_acls->a_count,
|
|
GFP_KERNEL);
|
|
if (!smb_acl)
|
|
goto out;
|
|
|
|
smb_acl->count = posix_acls->a_count;
|
|
pa_entry = posix_acls->a_entries;
|
|
xa_entry = smb_acl->entries;
|
|
for (i = 0; i < posix_acls->a_count; i++, pa_entry++, xa_entry++) {
|
|
switch (pa_entry->e_tag) {
|
|
case ACL_USER:
|
|
xa_entry->type = SMB_ACL_USER;
|
|
xa_entry->uid = posix_acl_uid_translate(user_ns, pa_entry);
|
|
break;
|
|
case ACL_USER_OBJ:
|
|
xa_entry->type = SMB_ACL_USER_OBJ;
|
|
break;
|
|
case ACL_GROUP:
|
|
xa_entry->type = SMB_ACL_GROUP;
|
|
xa_entry->gid = posix_acl_gid_translate(user_ns, pa_entry);
|
|
break;
|
|
case ACL_GROUP_OBJ:
|
|
xa_entry->type = SMB_ACL_GROUP_OBJ;
|
|
break;
|
|
case ACL_OTHER:
|
|
xa_entry->type = SMB_ACL_OTHER;
|
|
break;
|
|
case ACL_MASK:
|
|
xa_entry->type = SMB_ACL_MASK;
|
|
break;
|
|
default:
|
|
pr_err("unknown type : 0x%x\n", pa_entry->e_tag);
|
|
goto out;
|
|
}
|
|
|
|
if (pa_entry->e_perm & ACL_READ)
|
|
xa_entry->perm |= SMB_ACL_READ;
|
|
if (pa_entry->e_perm & ACL_WRITE)
|
|
xa_entry->perm |= SMB_ACL_WRITE;
|
|
if (pa_entry->e_perm & ACL_EXECUTE)
|
|
xa_entry->perm |= SMB_ACL_EXECUTE;
|
|
}
|
|
out:
|
|
posix_acl_release(posix_acls);
|
|
return smb_acl;
|
|
}
|
|
|
|
int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
|
|
struct user_namespace *user_ns,
|
|
struct dentry *dentry,
|
|
struct smb_ntsd *pntsd, int len)
|
|
{
|
|
int rc;
|
|
struct ndr sd_ndr = {0}, acl_ndr = {0};
|
|
struct xattr_ntacl acl = {0};
|
|
struct xattr_smb_acl *smb_acl, *def_smb_acl = NULL;
|
|
struct inode *inode = d_inode(dentry);
|
|
|
|
acl.version = 4;
|
|
acl.hash_type = XATTR_SD_HASH_TYPE_SHA256;
|
|
acl.current_time = ksmbd_UnixTimeToNT(current_time(inode));
|
|
|
|
memcpy(acl.desc, "posix_acl", 9);
|
|
acl.desc_len = 10;
|
|
|
|
pntsd->osidoffset =
|
|
cpu_to_le32(le32_to_cpu(pntsd->osidoffset) + NDR_NTSD_OFFSETOF);
|
|
pntsd->gsidoffset =
|
|
cpu_to_le32(le32_to_cpu(pntsd->gsidoffset) + NDR_NTSD_OFFSETOF);
|
|
pntsd->dacloffset =
|
|
cpu_to_le32(le32_to_cpu(pntsd->dacloffset) + NDR_NTSD_OFFSETOF);
|
|
|
|
acl.sd_buf = (char *)pntsd;
|
|
acl.sd_size = len;
|
|
|
|
rc = ksmbd_gen_sd_hash(conn, acl.sd_buf, acl.sd_size, acl.hash);
|
|
if (rc) {
|
|
pr_err("failed to generate hash for ndr acl\n");
|
|
return rc;
|
|
}
|
|
|
|
smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode,
|
|
ACL_TYPE_ACCESS);
|
|
if (S_ISDIR(inode->i_mode))
|
|
def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode,
|
|
ACL_TYPE_DEFAULT);
|
|
|
|
rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode,
|
|
smb_acl, def_smb_acl);
|
|
if (rc) {
|
|
pr_err("failed to encode ndr to posix acl\n");
|
|
goto out;
|
|
}
|
|
|
|
rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset,
|
|
acl.posix_acl_hash);
|
|
if (rc) {
|
|
pr_err("failed to generate hash for ndr acl\n");
|
|
goto out;
|
|
}
|
|
|
|
rc = ndr_encode_v4_ntacl(&sd_ndr, &acl);
|
|
if (rc) {
|
|
pr_err("failed to encode ndr to posix acl\n");
|
|
goto out;
|
|
}
|
|
|
|
rc = ksmbd_vfs_setxattr(user_ns, dentry,
|
|
XATTR_NAME_SD, sd_ndr.data,
|
|
sd_ndr.offset, 0);
|
|
if (rc < 0)
|
|
pr_err("Failed to store XATTR ntacl :%d\n", rc);
|
|
|
|
kfree(sd_ndr.data);
|
|
out:
|
|
kfree(acl_ndr.data);
|
|
kfree(smb_acl);
|
|
kfree(def_smb_acl);
|
|
return rc;
|
|
}
|
|
|
|
int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
|
|
struct user_namespace *user_ns,
|
|
struct dentry *dentry,
|
|
struct smb_ntsd **pntsd)
|
|
{
|
|
int rc;
|
|
struct ndr n;
|
|
struct inode *inode = d_inode(dentry);
|
|
struct ndr acl_ndr = {0};
|
|
struct xattr_ntacl acl;
|
|
struct xattr_smb_acl *smb_acl = NULL, *def_smb_acl = NULL;
|
|
__u8 cmp_hash[XATTR_SD_HASH_SIZE] = {0};
|
|
|
|
rc = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_SD, &n.data);
|
|
if (rc <= 0)
|
|
return rc;
|
|
|
|
n.length = rc;
|
|
rc = ndr_decode_v4_ntacl(&n, &acl);
|
|
if (rc)
|
|
goto free_n_data;
|
|
|
|
smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode,
|
|
ACL_TYPE_ACCESS);
|
|
if (S_ISDIR(inode->i_mode))
|
|
def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(user_ns, inode,
|
|
ACL_TYPE_DEFAULT);
|
|
|
|
rc = ndr_encode_posix_acl(&acl_ndr, user_ns, inode, smb_acl,
|
|
def_smb_acl);
|
|
if (rc) {
|
|
pr_err("failed to encode ndr to posix acl\n");
|
|
goto out_free;
|
|
}
|
|
|
|
rc = ksmbd_gen_sd_hash(conn, acl_ndr.data, acl_ndr.offset, cmp_hash);
|
|
if (rc) {
|
|
pr_err("failed to generate hash for ndr acl\n");
|
|
goto out_free;
|
|
}
|
|
|
|
if (memcmp(cmp_hash, acl.posix_acl_hash, XATTR_SD_HASH_SIZE)) {
|
|
pr_err("hash value diff\n");
|
|
rc = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
*pntsd = acl.sd_buf;
|
|
if (acl.sd_size < sizeof(struct smb_ntsd)) {
|
|
pr_err("sd size is invalid\n");
|
|
goto out_free;
|
|
}
|
|
|
|
(*pntsd)->osidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->osidoffset) -
|
|
NDR_NTSD_OFFSETOF);
|
|
(*pntsd)->gsidoffset = cpu_to_le32(le32_to_cpu((*pntsd)->gsidoffset) -
|
|
NDR_NTSD_OFFSETOF);
|
|
(*pntsd)->dacloffset = cpu_to_le32(le32_to_cpu((*pntsd)->dacloffset) -
|
|
NDR_NTSD_OFFSETOF);
|
|
|
|
rc = acl.sd_size;
|
|
out_free:
|
|
kfree(acl_ndr.data);
|
|
kfree(smb_acl);
|
|
kfree(def_smb_acl);
|
|
if (rc < 0) {
|
|
kfree(acl.sd_buf);
|
|
*pntsd = NULL;
|
|
}
|
|
|
|
free_n_data:
|
|
kfree(n.data);
|
|
return rc;
|
|
}
|
|
|
|
int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns,
|
|
struct dentry *dentry,
|
|
struct xattr_dos_attrib *da)
|
|
{
|
|
struct ndr n;
|
|
int err;
|
|
|
|
err = ndr_encode_dos_attr(&n, da);
|
|
if (err)
|
|
return err;
|
|
|
|
err = ksmbd_vfs_setxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE,
|
|
(void *)n.data, n.offset, 0);
|
|
if (err)
|
|
ksmbd_debug(SMB, "failed to store dos attribute in xattr\n");
|
|
kfree(n.data);
|
|
|
|
return err;
|
|
}
|
|
|
|
int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns,
|
|
struct dentry *dentry,
|
|
struct xattr_dos_attrib *da)
|
|
{
|
|
struct ndr n;
|
|
int err;
|
|
|
|
err = ksmbd_vfs_getxattr(user_ns, dentry, XATTR_NAME_DOS_ATTRIBUTE,
|
|
(char **)&n.data);
|
|
if (err > 0) {
|
|
n.length = err;
|
|
if (ndr_decode_dos_attr(&n, da))
|
|
err = -EINVAL;
|
|
kfree(n.data);
|
|
} else {
|
|
ksmbd_debug(SMB, "failed to load dos attribute in xattr\n");
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* ksmbd_vfs_init_kstat() - convert unix stat information to smb stat format
|
|
* @p: destination buffer
|
|
* @ksmbd_kstat: ksmbd kstat wrapper
|
|
*/
|
|
void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat)
|
|
{
|
|
struct file_directory_info *info = (struct file_directory_info *)(*p);
|
|
struct kstat *kstat = ksmbd_kstat->kstat;
|
|
u64 time;
|
|
|
|
info->FileIndex = 0;
|
|
info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
|
|
time = ksmbd_UnixTimeToNT(kstat->atime);
|
|
info->LastAccessTime = cpu_to_le64(time);
|
|
time = ksmbd_UnixTimeToNT(kstat->mtime);
|
|
info->LastWriteTime = cpu_to_le64(time);
|
|
time = ksmbd_UnixTimeToNT(kstat->ctime);
|
|
info->ChangeTime = cpu_to_le64(time);
|
|
|
|
if (ksmbd_kstat->file_attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
|
|
info->EndOfFile = 0;
|
|
info->AllocationSize = 0;
|
|
} else {
|
|
info->EndOfFile = cpu_to_le64(kstat->size);
|
|
info->AllocationSize = cpu_to_le64(kstat->blocks << 9);
|
|
}
|
|
info->ExtFileAttributes = ksmbd_kstat->file_attributes;
|
|
|
|
return info;
|
|
}
|
|
|
|
int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
|
|
struct user_namespace *user_ns,
|
|
struct dentry *dentry,
|
|
struct ksmbd_kstat *ksmbd_kstat)
|
|
{
|
|
u64 time;
|
|
int rc;
|
|
|
|
generic_fillattr(user_ns, d_inode(dentry), ksmbd_kstat->kstat);
|
|
|
|
time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
|
|
ksmbd_kstat->create_time = time;
|
|
|
|
/*
|
|
* set default value for the case that store dos attributes is not yes
|
|
* or that acl is disable in server's filesystem and the config is yes.
|
|
*/
|
|
if (S_ISDIR(ksmbd_kstat->kstat->mode))
|
|
ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_DIRECTORY_LE;
|
|
else
|
|
ksmbd_kstat->file_attributes = FILE_ATTRIBUTE_ARCHIVE_LE;
|
|
|
|
if (test_share_config_flag(work->tcon->share_conf,
|
|
KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
|
|
struct xattr_dos_attrib da;
|
|
|
|
rc = ksmbd_vfs_get_dos_attrib_xattr(user_ns, dentry, &da);
|
|
if (rc > 0) {
|
|
ksmbd_kstat->file_attributes = cpu_to_le32(da.attr);
|
|
ksmbd_kstat->create_time = da.create_time;
|
|
} else {
|
|
ksmbd_debug(VFS, "fail to load dos attribute.\n");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns,
|
|
struct dentry *dentry, char *attr_name,
|
|
int attr_name_len)
|
|
{
|
|
char *name, *xattr_list = NULL;
|
|
ssize_t value_len = -ENOENT, xattr_list_len;
|
|
|
|
xattr_list_len = ksmbd_vfs_listxattr(dentry, &xattr_list);
|
|
if (xattr_list_len <= 0)
|
|
goto out;
|
|
|
|
for (name = xattr_list; name - xattr_list < xattr_list_len;
|
|
name += strlen(name) + 1) {
|
|
ksmbd_debug(VFS, "%s, len %zd\n", name, strlen(name));
|
|
if (strncasecmp(attr_name, name, attr_name_len))
|
|
continue;
|
|
|
|
value_len = ksmbd_vfs_xattr_len(user_ns, dentry, name);
|
|
break;
|
|
}
|
|
|
|
out:
|
|
kvfree(xattr_list);
|
|
return value_len;
|
|
}
|
|
|
|
int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
|
|
size_t *xattr_stream_name_size, int s_type)
|
|
{
|
|
char *type, *buf;
|
|
|
|
if (s_type == DIR_STREAM)
|
|
type = ":$INDEX_ALLOCATION";
|
|
else
|
|
type = ":$DATA";
|
|
|
|
buf = kasprintf(GFP_KERNEL, "%s%s%s",
|
|
XATTR_NAME_STREAM, stream_name, type);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
*xattr_stream_name = buf;
|
|
*xattr_stream_name_size = strlen(buf) + 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
|
|
struct ksmbd_file *src_fp,
|
|
struct ksmbd_file *dst_fp,
|
|
struct srv_copychunk *chunks,
|
|
unsigned int chunk_count,
|
|
unsigned int *chunk_count_written,
|
|
unsigned int *chunk_size_written,
|
|
loff_t *total_size_written)
|
|
{
|
|
unsigned int i;
|
|
loff_t src_off, dst_off, src_file_size;
|
|
size_t len;
|
|
int ret;
|
|
|
|
*chunk_count_written = 0;
|
|
*chunk_size_written = 0;
|
|
*total_size_written = 0;
|
|
|
|
if (!(src_fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) {
|
|
pr_err("no right to read(%pd)\n", src_fp->filp->f_path.dentry);
|
|
return -EACCES;
|
|
}
|
|
if (!(dst_fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE))) {
|
|
pr_err("no right to write(%pd)\n", dst_fp->filp->f_path.dentry);
|
|
return -EACCES;
|
|
}
|
|
|
|
if (ksmbd_stream_fd(src_fp) || ksmbd_stream_fd(dst_fp))
|
|
return -EBADF;
|
|
|
|
smb_break_all_levII_oplock(work, dst_fp, 1);
|
|
|
|
if (!work->tcon->posix_extensions) {
|
|
for (i = 0; i < chunk_count; i++) {
|
|
src_off = le64_to_cpu(chunks[i].SourceOffset);
|
|
dst_off = le64_to_cpu(chunks[i].TargetOffset);
|
|
len = le32_to_cpu(chunks[i].Length);
|
|
|
|
if (check_lock_range(src_fp->filp, src_off,
|
|
src_off + len - 1, READ))
|
|
return -EAGAIN;
|
|
if (check_lock_range(dst_fp->filp, dst_off,
|
|
dst_off + len - 1, WRITE))
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
|
|
src_file_size = i_size_read(file_inode(src_fp->filp));
|
|
|
|
for (i = 0; i < chunk_count; i++) {
|
|
src_off = le64_to_cpu(chunks[i].SourceOffset);
|
|
dst_off = le64_to_cpu(chunks[i].TargetOffset);
|
|
len = le32_to_cpu(chunks[i].Length);
|
|
|
|
if (src_off + len > src_file_size)
|
|
return -E2BIG;
|
|
|
|
ret = vfs_copy_file_range(src_fp->filp, src_off,
|
|
dst_fp->filp, dst_off, len, 0);
|
|
if (ret == -EOPNOTSUPP || ret == -EXDEV)
|
|
ret = generic_copy_file_range(src_fp->filp, src_off,
|
|
dst_fp->filp, dst_off,
|
|
len, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*chunk_count_written += 1;
|
|
*total_size_written += ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void ksmbd_vfs_posix_lock_wait(struct file_lock *flock)
|
|
{
|
|
wait_event(flock->fl_wait, !flock->fl_blocker);
|
|
}
|
|
|
|
int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout)
|
|
{
|
|
return wait_event_interruptible_timeout(flock->fl_wait,
|
|
!flock->fl_blocker,
|
|
timeout);
|
|
}
|
|
|
|
void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock)
|
|
{
|
|
locks_delete_block(flock);
|
|
}
|
|
|
|
int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns,
|
|
struct inode *inode)
|
|
{
|
|
struct posix_acl_state acl_state;
|
|
struct posix_acl *acls;
|
|
int rc;
|
|
|
|
if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
|
|
return -EOPNOTSUPP;
|
|
|
|
ksmbd_debug(SMB, "Set posix acls\n");
|
|
rc = init_acl_state(&acl_state, 1);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Set default owner group */
|
|
acl_state.owner.allow = (inode->i_mode & 0700) >> 6;
|
|
acl_state.group.allow = (inode->i_mode & 0070) >> 3;
|
|
acl_state.other.allow = inode->i_mode & 0007;
|
|
acl_state.users->aces[acl_state.users->n].uid = inode->i_uid;
|
|
acl_state.users->aces[acl_state.users->n++].perms.allow =
|
|
acl_state.owner.allow;
|
|
acl_state.groups->aces[acl_state.groups->n].gid = inode->i_gid;
|
|
acl_state.groups->aces[acl_state.groups->n++].perms.allow =
|
|
acl_state.group.allow;
|
|
acl_state.mask.allow = 0x07;
|
|
|
|
acls = posix_acl_alloc(6, GFP_KERNEL);
|
|
if (!acls) {
|
|
free_acl_state(&acl_state);
|
|
return -ENOMEM;
|
|
}
|
|
posix_state_to_acl(&acl_state, acls->a_entries);
|
|
rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls);
|
|
if (rc < 0)
|
|
ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
|
|
rc);
|
|
else if (S_ISDIR(inode->i_mode)) {
|
|
posix_state_to_acl(&acl_state, acls->a_entries);
|
|
rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT,
|
|
acls);
|
|
if (rc < 0)
|
|
ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
|
|
rc);
|
|
}
|
|
free_acl_state(&acl_state);
|
|
posix_acl_release(acls);
|
|
return rc;
|
|
}
|
|
|
|
int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns,
|
|
struct inode *inode, struct inode *parent_inode)
|
|
{
|
|
struct posix_acl *acls;
|
|
struct posix_acl_entry *pace;
|
|
int rc, i;
|
|
|
|
if (!IS_ENABLED(CONFIG_FS_POSIX_ACL))
|
|
return -EOPNOTSUPP;
|
|
|
|
acls = get_acl(parent_inode, ACL_TYPE_DEFAULT);
|
|
if (!acls)
|
|
return -ENOENT;
|
|
pace = acls->a_entries;
|
|
|
|
for (i = 0; i < acls->a_count; i++, pace++) {
|
|
if (pace->e_tag == ACL_MASK) {
|
|
pace->e_perm = 0x07;
|
|
break;
|
|
}
|
|
}
|
|
|
|
rc = set_posix_acl(user_ns, inode, ACL_TYPE_ACCESS, acls);
|
|
if (rc < 0)
|
|
ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_ACCESS) failed, rc : %d\n",
|
|
rc);
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
rc = set_posix_acl(user_ns, inode, ACL_TYPE_DEFAULT,
|
|
acls);
|
|
if (rc < 0)
|
|
ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n",
|
|
rc);
|
|
}
|
|
posix_acl_release(acls);
|
|
return rc;
|
|
}
|