| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> |
| * Copyright (C) 2018 Samsung Electronics Co., Ltd. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/fs.h> |
| #include <linux/filelock.h> |
| #include <linux/uaccess.h> |
| #include <linux/backing-dev.h> |
| #include <linux/writeback.h> |
| #include <linux/xattr.h> |
| #include <linux/falloc.h> |
| #include <linux/fsnotify.h> |
| #include <linux/dcache.h> |
| #include <linux/slab.h> |
| #include <linux/vmalloc.h> |
| #include <linux/sched/xacct.h> |
| #include <linux/crc32c.h> |
| #include <linux/namei.h> |
| |
| #include "glob.h" |
| #include "oplock.h" |
| #include "connection.h" |
| #include "vfs.h" |
| #include "vfs_cache.h" |
| #include "smbacl.h" |
| #include "ndr.h" |
| #include "auth.h" |
| #include "misc.h" |
| |
| #include "smb_common.h" |
| #include "mgmt/share_config.h" |
| #include "mgmt/tree_connect.h" |
| #include "mgmt/user_session.h" |
| #include "mgmt/user_config.h" |
| |
| static void ksmbd_vfs_inherit_owner(struct ksmbd_work *work, |
| struct inode *parent_inode, |
| struct inode *inode) |
| { |
| if (!test_share_config_flag(work->tcon->share_conf, |
| KSMBD_SHARE_FLAG_INHERIT_OWNER)) |
| return; |
| |
| i_uid_write(inode, i_uid_read(parent_inode)); |
| } |
| |
| /** |
| * ksmbd_vfs_lock_parent() - lock parent dentry if it is stable |
| */ |
| int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child) |
| { |
| inode_lock_nested(d_inode(parent), I_MUTEX_PARENT); |
| if (child->d_parent != parent) { |
| inode_unlock(d_inode(parent)); |
| return -ENOENT; |
| } |
| |
| return 0; |
| } |
| |
| static int ksmbd_vfs_path_lookup_locked(struct ksmbd_share_config *share_conf, |
| char *pathname, unsigned int flags, |
| struct path *parent_path, |
| struct path *path) |
| { |
| struct qstr last; |
| struct filename *filename; |
| struct path *root_share_path = &share_conf->vfs_path; |
| int err, type; |
| struct dentry *d; |
| |
| if (pathname[0] == '\0') { |
| pathname = share_conf->path; |
| root_share_path = NULL; |
| } else { |
| flags |= LOOKUP_BENEATH; |
| } |
| |
| filename = getname_kernel(pathname); |
| if (IS_ERR(filename)) |
| return PTR_ERR(filename); |
| |
| err = vfs_path_parent_lookup(filename, flags, |
| parent_path, &last, &type, |
| root_share_path); |
| if (err) { |
| putname(filename); |
| return err; |
| } |
| |
| if (unlikely(type != LAST_NORM)) { |
| path_put(parent_path); |
| putname(filename); |
| return -ENOENT; |
| } |
| |
| inode_lock_nested(parent_path->dentry->d_inode, I_MUTEX_PARENT); |
| d = lookup_one_qstr_excl(&last, parent_path->dentry, 0); |
| if (IS_ERR(d)) |
| goto err_out; |
| |
| if (d_is_negative(d)) { |
| dput(d); |
| goto err_out; |
| } |
| |
| path->dentry = d; |
| path->mnt = mntget(parent_path->mnt); |
| |
| if (test_share_config_flag(share_conf, KSMBD_SHARE_FLAG_CROSSMNT)) { |
| err = follow_down(path, 0); |
| if (err < 0) { |
| path_put(path); |
| goto err_out; |
| } |
| } |
| |
| putname(filename); |
| return 0; |
| |
| err_out: |
| inode_unlock(d_inode(parent_path->dentry)); |
| path_put(parent_path); |
| putname(filename); |
| return -ENOENT; |
| } |
| |
| void ksmbd_vfs_query_maximal_access(struct mnt_idmap *idmap, |
| struct dentry *dentry, __le32 *daccess) |
| { |
| *daccess = cpu_to_le32(FILE_READ_ATTRIBUTES | READ_CONTROL); |
| |
| if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_WRITE)) |
| *daccess |= cpu_to_le32(WRITE_DAC | WRITE_OWNER | SYNCHRONIZE | |
| FILE_WRITE_DATA | FILE_APPEND_DATA | |
| FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES | |
| FILE_DELETE_CHILD); |
| |
| if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_READ)) |
| *daccess |= FILE_READ_DATA_LE | FILE_READ_EA_LE; |
| |
| if (!inode_permission(idmap, d_inode(dentry), MAY_OPEN | MAY_EXEC)) |
| *daccess |= FILE_EXECUTE_LE; |
| |
| if (!inode_permission(idmap, d_inode(dentry->d_parent), MAY_EXEC | MAY_WRITE)) |
| *daccess |= FILE_DELETE_LE; |
| } |
| |
| /** |
| * ksmbd_vfs_create() - vfs helper for smb create file |
| * @work: work |
| * @name: file name that is relative to share |
| * @mode: file create mode |
| * |
| * Return: 0 on success, otherwise error |
| */ |
| int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode) |
| { |
| struct path path; |
| struct dentry *dentry; |
| int err; |
| |
| dentry = ksmbd_vfs_kern_path_create(work, name, |
| LOOKUP_NO_SYMLINKS, &path); |
| if (IS_ERR(dentry)) { |
| err = PTR_ERR(dentry); |
| if (err != -ENOENT) |
| pr_err("path create failed for %s, err %d\n", |
| name, err); |
| return err; |
| } |
| |
| mode |= S_IFREG; |
| err = vfs_create(mnt_idmap(path.mnt), d_inode(path.dentry), |
| dentry, mode, true); |
| if (!err) { |
| ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), |
| d_inode(dentry)); |
| } else { |
| pr_err("File(%s): creation failed (err:%d)\n", name, err); |
| } |
| |
| done_path_create(&path, dentry); |
| return err; |
| } |
| |
| /** |
| * ksmbd_vfs_mkdir() - vfs helper for smb create directory |
| * @work: work |
| * @name: directory name that is relative to share |
| * @mode: directory create mode |
| * |
| * Return: 0 on success, otherwise error |
| */ |
| int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode) |
| { |
| struct mnt_idmap *idmap; |
| struct path path; |
| struct dentry *dentry; |
| int err; |
| |
| dentry = ksmbd_vfs_kern_path_create(work, name, |
| LOOKUP_NO_SYMLINKS | LOOKUP_DIRECTORY, |
| &path); |
| if (IS_ERR(dentry)) { |
| err = PTR_ERR(dentry); |
| if (err != -EEXIST) |
| ksmbd_debug(VFS, "path create failed for %s, err %d\n", |
| name, err); |
| return err; |
| } |
| |
| idmap = mnt_idmap(path.mnt); |
| mode |= S_IFDIR; |
| err = vfs_mkdir(idmap, d_inode(path.dentry), dentry, mode); |
| if (!err && d_unhashed(dentry)) { |
| struct dentry *d; |
| |
| d = lookup_one(idmap, dentry->d_name.name, dentry->d_parent, |
| dentry->d_name.len); |
| if (IS_ERR(d)) { |
| err = PTR_ERR(d); |
| goto out_err; |
| } |
| if (unlikely(d_is_negative(d))) { |
| dput(d); |
| err = -ENOENT; |
| goto out_err; |
| } |
| |
| ksmbd_vfs_inherit_owner(work, d_inode(path.dentry), d_inode(d)); |
| dput(d); |
| } |
| |
| out_err: |
| done_path_create(&path, dentry); |
| if (err) |
| pr_err("mkdir(%s): creation failed (err:%d)\n", name, err); |
| return err; |
| } |
| |
| static ssize_t ksmbd_vfs_getcasexattr(struct mnt_idmap *idmap, |
| struct dentry *dentry, char *attr_name, |
| int attr_name_len, char **attr_value) |
| { |
| 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_getxattr(idmap, |
| dentry, |
| name, |
| attr_value); |
| if (value_len < 0) |
| pr_err("failed to get xattr in file\n"); |
| break; |
| } |
| |
| out: |
| kvfree(xattr_list); |
| return value_len; |
| } |
| |
| static int ksmbd_vfs_stream_read(struct ksmbd_file *fp, char *buf, loff_t *pos, |
| size_t count) |
| { |
| ssize_t v_len; |
| char *stream_buf = NULL; |
| |
| ksmbd_debug(VFS, "read stream data pos : %llu, count : %zd\n", |
| *pos, count); |
| |
| v_len = ksmbd_vfs_getcasexattr(file_mnt_idmap(fp->filp), |
| fp->filp->f_path.dentry, |
| fp->stream.name, |
| fp->stream.size, |
| &stream_buf); |
| if ((int)v_len <= 0) |
| return (int)v_len; |
| |
| if (v_len <= *pos) { |
| count = -EINVAL; |
| goto free_buf; |
| } |
| |
| if (v_len - *pos < count) |
| count = v_len - *pos; |
| |
| memcpy(buf, &stream_buf[*pos], count); |
| |
| free_buf: |
| kvfree(stream_buf); |
| return count; |
| } |
| |
| /** |
| * check_lock_range() - vfs helper for smb byte range file locking |
| * @filp: the file to apply the lock to |
| * @start: lock start byte offset |
| * @end: lock end byte offset |
| * @type: byte range type read/write |
| * |
| * Return: 0 on success, otherwise error |
| */ |
| static int check_lock_range(struct file *filp, loff_t start, loff_t end, |
| unsigned char type) |
| { |
| struct file_lock *flock; |
| struct file_lock_context *ctx = locks_inode_context(file_inode(filp)); |
| int error = 0; |
| |
| if (!ctx || list_empty_careful(&ctx->flc_posix)) |
| return 0; |
| |
| spin_lock(&ctx->flc_lock); |
| list_for_each_entry(flock, &ctx->flc_posix, fl_list) { |
| /* check conflict locks */ |
| if (flock->fl_end >= start && end >= flock->fl_start) { |
| if (flock->fl_type == F_RDLCK) { |
| if (type == WRITE) { |
| pr_err("not allow write by shared lock\n"); |
| error = 1; |
| goto out; |
| } |
| } else if (flock->fl_type == F_WRLCK) { |
| /* check owner in lock */ |
| if (flock->fl_file != filp) { |
| error = 1; |
| pr_err("not allow rw access by exclusive lock from other opens\n"); |
| goto out; |
| } |
| } |
| } |
| } |
| out: |
| spin_unlock(&ctx->flc_lock); |
| return error; |
| } |
| |
| /** |
| * ksmbd_vfs_read() - vfs helper for smb file read |
| * @work: smb work |
| * @fid: file id of open file |
| * @count: read byte count |
| * @pos: file pos |
| * @rbuf: read data buffer |
| * |
| * Return: number of read bytes on success, otherwise error |
| */ |
| int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count, |
| loff_t *pos, char *rbuf) |
| { |
| struct file *filp = fp->filp; |
| ssize_t nbytes = 0; |
| struct inode *inode = file_inode(filp); |
| |
| if (S_ISDIR(inode->i_mode)) |
| return -EISDIR; |
| |
| if (unlikely(count == 0)) |
| return 0; |
| |
| if (work->conn->connection_type) { |
| if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_EXECUTE_LE))) { |
| pr_err("no right to read(%pD)\n", fp->filp); |
| return -EACCES; |
| } |
| } |
| |
| if (ksmbd_stream_fd(fp)) |
| return ksmbd_vfs_stream_read(fp, rbuf, pos, count); |
| |
| if (!work->tcon->posix_extensions) { |
| int ret; |
| |
| ret = check_lock_range(filp, *pos, *pos + count - 1, READ); |
| if (ret) { |
| pr_err("unable to read due to lock\n"); |
| return -EAGAIN; |
| } |
| } |
| |
| nbytes = kernel_read(filp, rbuf, count, pos); |
| if (nbytes < 0) { |
| pr_err("smb read failed, err = %zd\n", nbytes); |
| return nbytes; |
| } |
| |
| filp->f_pos = *pos; |
| return nbytes; |
| } |
| |
| static int ksmbd_vfs_stream_write(struct ksmbd_file *fp, char *buf, loff_t *pos, |
| size_t count) |
| { |
| char *stream_buf = NULL, *wbuf; |
| struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); |
| size_t size; |
| ssize_t v_len; |
| int err = 0; |
| |
| ksmbd_debug(VFS, "write stream data pos : %llu, count : %zd\n", |
| *pos, count); |
| |
| size = *pos + count; |
| if (size > XATTR_SIZE_MAX) { |
| size = XATTR_SIZE_MAX; |
| count = (*pos + count) - XATTR_SIZE_MAX; |
| } |
| |
| v_len = ksmbd_vfs_getcasexattr(idmap, |
| fp->filp->f_path.dentry, |
| fp->stream.name, |
| fp->stream.size, |
| &stream_buf); |
| if (v_len < 0) { |
| pr_err("not found stream in xattr : %zd\n", v_len); |
| err = v_len; |
| goto out; |
| } |
| |
| if (v_len < size) { |
| wbuf = kvzalloc(size, GFP_KERNEL); |
| if (!wbuf) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| if (v_len > 0) |
| memcpy(wbuf, stream_buf, v_len); |
| kvfree(stream_buf); |
| stream_buf = wbuf; |
| } |
| |
| memcpy(&stream_buf[*pos], buf, count); |
| |
| err = ksmbd_vfs_setxattr(idmap, |
| &fp->filp->f_path, |
| fp->stream.name, |
| (void *)stream_buf, |
| size, |
| 0); |
| if (err < 0) |
| goto out; |
| |
| fp->filp->f_pos = *pos; |
| err = 0; |
| out: |
| kvfree(stream_buf); |
| 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); |
| 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, 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(const 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, const struct path *path) |
| { |
| struct mnt_idmap *idmap; |
| struct dentry *parent = path->dentry->d_parent; |
| int err; |
| |
| if (ksmbd_override_fsids(work)) |
| return -ENOMEM; |
| |
| if (!d_inode(path->dentry)->i_nlink) { |
| err = -ENOENT; |
| goto out_err; |
| } |
| |
| err = mnt_want_write(path->mnt); |
| if (err) |
| goto out_err; |
| |
| idmap = mnt_idmap(path->mnt); |
| if (S_ISDIR(d_inode(path->dentry)->i_mode)) { |
| err = vfs_rmdir(idmap, d_inode(parent), path->dentry); |
| if (err && err != -ENOTEMPTY) |
| ksmbd_debug(VFS, "rmdir failed, err %d\n", err); |
| } else { |
| err = vfs_unlink(idmap, d_inode(parent), path->dentry, NULL); |
| if (err) |
| ksmbd_debug(VFS, "unlink failed, err %d\n", err); |
| } |
| mnt_drop_write(path->mnt); |
| |
| out_err: |
| 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_idmap(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; |
| } |
| |
| int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path, |
| char *newname, int flags) |
| { |
| struct dentry *old_parent, *new_dentry, *trap; |
| struct dentry *old_child = old_path->dentry; |
| struct path new_path; |
| struct qstr new_last; |
| struct renamedata rd; |
| struct filename *to; |
| struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
| struct ksmbd_file *parent_fp; |
| int new_type; |
| int err, lookup_flags = LOOKUP_NO_SYMLINKS; |
| |
| if (ksmbd_override_fsids(work)) |
| return -ENOMEM; |
| |
| to = getname_kernel(newname); |
| if (IS_ERR(to)) { |
| err = PTR_ERR(to); |
| goto revert_fsids; |
| } |
| |
| retry: |
| err = vfs_path_parent_lookup(to, lookup_flags | LOOKUP_BENEATH, |
| &new_path, &new_last, &new_type, |
| &share_conf->vfs_path); |
| if (err) |
| goto out1; |
| |
| if (old_path->mnt != new_path.mnt) { |
| err = -EXDEV; |
| goto out2; |
| } |
| |
| err = mnt_want_write(old_path->mnt); |
| if (err) |
| goto out2; |
| |
| trap = lock_rename_child(old_child, new_path.dentry); |
| |
| old_parent = dget(old_child->d_parent); |
| if (d_unhashed(old_child)) { |
| err = -EINVAL; |
| goto out3; |
| } |
| |
| parent_fp = ksmbd_lookup_fd_inode(d_inode(old_child->d_parent)); |
| if (parent_fp) { |
| if (parent_fp->daccess & FILE_DELETE_LE) { |
| pr_err("parent dir is opened with delete access\n"); |
| err = -ESHARE; |
| ksmbd_fd_put(work, parent_fp); |
| goto out3; |
| } |
| ksmbd_fd_put(work, parent_fp); |
| } |
| |
| new_dentry = lookup_one_qstr_excl(&new_last, new_path.dentry, |
| lookup_flags | LOOKUP_RENAME_TARGET); |
| if (IS_ERR(new_dentry)) { |
| err = PTR_ERR(new_dentry); |
| goto out3; |
| } |
| |
| if (d_is_symlink(new_dentry)) { |
| err = -EACCES; |
| goto out4; |
| } |
| |
| if ((flags & RENAME_NOREPLACE) && d_is_positive(new_dentry)) { |
| err = -EEXIST; |
| goto out4; |
| } |
| |
| if (old_child == trap) { |
| err = -EINVAL; |
| goto out4; |
| } |
| |
| if (new_dentry == trap) { |
| err = -ENOTEMPTY; |
| goto out4; |
| } |
| |
| rd.old_mnt_idmap = mnt_idmap(old_path->mnt), |
| rd.old_dir = d_inode(old_parent), |
| rd.old_dentry = old_child, |
| rd.new_mnt_idmap = mnt_idmap(new_path.mnt), |
| rd.new_dir = new_path.dentry->d_inode, |
| rd.new_dentry = new_dentry, |
| rd.flags = flags, |
| rd.delegated_inode = NULL, |
| err = vfs_rename(&rd); |
| if (err) |
| ksmbd_debug(VFS, "vfs_rename failed err %d\n", err); |
| |
| out4: |
| dput(new_dentry); |
| out3: |
| dput(old_parent); |
| unlock_rename(old_parent, new_path.dentry); |
| mnt_drop_write(old_path->mnt); |
| out2: |
| path_put(&new_path); |
| |
| if (retry_estale(err, lookup_flags)) { |
| lookup_flags |= LOOKUP_REVAL; |
| goto retry; |
| } |
| out1: |
| putname(to); |
| revert_fsids: |
| ksmbd_revert_fsids(work); |
| 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 = kvzalloc(size, GFP_KERNEL); |
| 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 mnt_idmap *idmap, |
| struct dentry *dentry, char *xattr_name) |
| { |
| return vfs_getxattr(idmap, dentry, xattr_name, NULL, 0); |
| } |
| |
| /** |
| * ksmbd_vfs_getxattr() - vfs helper for smb get extended attributes value |
| * @idmap: idmap |
| * @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 mnt_idmap *idmap, |
| struct dentry *dentry, |
| char *xattr_name, char **xattr_buf) |
| { |
| ssize_t xattr_len; |
| char *buf; |
| |
| *xattr_buf = NULL; |
| xattr_len = ksmbd_vfs_xattr_len(idmap, 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(idmap, 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 |
| * @idmap: idmap of the relevant mount |
| * @path: path of dentry to set XATTR at |
| * @attr_name: xattr name for setxattr |
| * @attr_value: xattr value to set |
| * @attr_size: size of xattr value |
| * @flags: destination buffer length |
| * |
| * Return: 0 on success, otherwise error |
| */ |
| int ksmbd_vfs_setxattr(struct mnt_idmap *idmap, |
| const struct path *path, const char *attr_name, |
| void *attr_value, size_t attr_size, int flags) |
| { |
| int err; |
| |
| err = mnt_want_write(path->mnt); |
| if (err) |
| return err; |
| |
| err = vfs_setxattr(idmap, |
| path->dentry, |
| attr_name, |
| attr_value, |
| attr_size, |
| flags); |
| if (err) |
| ksmbd_debug(VFS, "setxattr failed, err %d\n", err); |
| mnt_drop_write(path->mnt); |
| 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 mnt_idmap *idmap, |
| const struct path *path, char *attr_name) |
| { |
| int err; |
| |
| err = mnt_want_write(path->mnt); |
| if (err) |
| return err; |
| |
| err = vfs_removexattr(idmap, path->dentry, attr_name); |
| mnt_drop_write(path->mnt); |
| |
| return err; |
| } |
| |
| int ksmbd_vfs_unlink(struct file *filp) |
| { |
| int err = 0; |
| struct dentry *dir, *dentry = filp->f_path.dentry; |
| struct mnt_idmap *idmap = file_mnt_idmap(filp); |
| |
| err = mnt_want_write(filp->f_path.mnt); |
| if (err) |
| return err; |
| |
| dir = dget_parent(dentry); |
| err = ksmbd_vfs_lock_parent(dir, dentry); |
| if (err) |
| goto out; |
| dget(dentry); |
| |
| if (S_ISDIR(d_inode(dentry)->i_mode)) |
| err = vfs_rmdir(idmap, d_inode(dir), dentry); |
| else |
| err = vfs_unlink(idmap, d_inode(dir), dentry, NULL); |
| |
| dput(dentry); |
| inode_unlock(d_inode(dir)); |
| if (err) |
| ksmbd_debug(VFS, "failed to delete, err %d\n", err); |
| out: |
| dput(dir); |
| mnt_drop_write(filp->f_path.mnt); |
| |
| 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; |
| int cmp = -EINVAL; |
| |
| buf = container_of(ctx, struct ksmbd_readdir_data, ctx); |
| |
| if (buf->used != namlen) |
| return true; |
| if (IS_ENABLED(CONFIG_UNICODE) && buf->um) { |
| const struct qstr q_buf = {.name = buf->private, |
| .len = buf->used}; |
| const struct qstr q_name = {.name = name, |
| .len = namlen}; |
| |
| cmp = utf8_strncasecmp(buf->um, &q_buf, &q_name); |
| } |
| if (cmp < 0) |
| cmp = strncasecmp((char *)buf->private, name, namlen); |
| if (!cmp) { |
| 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(const struct path *dir, char *name, |
| size_t namelen, struct unicode_map *um) |
| { |
| 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, |
| .um = um, |
| }; |
| |
| 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_locked() - lookup a file and get path info |
| * @name: file path that is relative to share |
| * @flags: lookup flags |
| * @parent_path: if lookup succeed, return parent_path info |
| * @path: if lookup succeed, return path info |
| * @caseless: caseless filename lookup |
| * |
| * Return: 0 on success, otherwise error |
| */ |
| int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name, |
| unsigned int flags, struct path *parent_path, |
| struct path *path, bool caseless) |
| { |
| struct ksmbd_share_config *share_conf = work->tcon->share_conf; |
| int err; |
| |
| err = ksmbd_vfs_path_lookup_locked(share_conf, name, flags, parent_path, |
| path); |
| if (!err) |
| return 0; |
| |
| if (caseless) { |
| char *filepath; |
| size_t path_len, remain_len; |
| |
| filepath = kstrdup(name, GFP_KERNEL); |
| if (!filepath) |
| return -ENOMEM; |
| |
| path_len = strlen(filepath); |
| remain_len = path_len; |
| |
| *parent_path = share_conf->vfs_path; |
| path_get(parent_path); |
| |
| while (d_can_lookup(parent_path->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_path, filename, |
| filename_len, |
| work->conn->um); |
| if (err) |
| goto out2; |
| |
| next[0] = '\0'; |
| |
| err = vfs_path_lookup(share_conf->vfs_path.dentry, |
| share_conf->vfs_path.mnt, |
| filepath, |
| flags, |
| path); |
| if (err) |
| goto out2; |
| else if (is_last) |
| goto out1; |
| path_put(parent_path); |
| *parent_path = *path; |
| |
| next[0] = '/'; |
| remain_len -= filename_len + 1; |
| } |
| |
| err = -EINVAL; |
| out2: |
| path_put(parent_path); |
| out1: |
| kfree(filepath); |
| } |
| |
| if (!err) { |
| err = ksmbd_vfs_lock_parent(parent_path->dentry, path->dentry); |
| if (err) { |
| path_put(path); |
| path_put(parent_path); |
| } |
| } |
| 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 mnt_idmap *idmap, |
| const struct path *path) |
| { |
| char *name, *xattr_list = NULL; |
| ssize_t xattr_list_len; |
| int err = 0; |
| |
| xattr_list_len = ksmbd_vfs_listxattr(path->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; |
| } |
| |
| err = mnt_want_write(path->mnt); |
| if (err) |
| 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 = vfs_remove_acl(idmap, path->dentry, name); |
| if (err) |
| ksmbd_debug(SMB, |
| "remove acl xattr failed : %s\n", name); |
| } |
| } |
| mnt_drop_write(path->mnt); |
| |
| out: |
| kvfree(xattr_list); |
| return err; |
| } |
| |
| int ksmbd_vfs_remove_sd_xattrs(struct mnt_idmap *idmap, const struct path *path) |
| { |
| char *name, *xattr_list = NULL; |
| ssize_t xattr_list_len; |
| int err = 0; |
| |
| xattr_list_len = ksmbd_vfs_listxattr(path->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(idmap, path, 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 mnt_idmap *idmap, |
| 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_inode_acl(inode, acl_type); |
| if (IS_ERR_OR_NULL(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(idmap, 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(idmap, 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 mnt_idmap *idmap, |
| const struct path *path, |
| 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 dentry *dentry = path->dentry; |
| 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(idmap, inode, |
| ACL_TYPE_ACCESS); |
| if (S_ISDIR(inode->i_mode)) |
| def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode, |
| ACL_TYPE_DEFAULT); |
| |
| rc = ndr_encode_posix_acl(&acl_ndr, idmap, 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(idmap, path, |
| 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 mnt_idmap *idmap, |
| 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(idmap, 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(idmap, inode, |
| ACL_TYPE_ACCESS); |
| if (S_ISDIR(inode->i_mode)) |
| def_smb_acl = ksmbd_vfs_make_xattr_posix_acl(idmap, inode, |
| ACL_TYPE_DEFAULT); |
| |
| rc = ndr_encode_posix_acl(&acl_ndr, idmap, 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 mnt_idmap *idmap, |
| const struct path *path, |
| 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(idmap, path, 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 mnt_idmap *idmap, |
| struct dentry *dentry, |
| struct xattr_dos_attrib *da) |
| { |
| struct ndr n; |
| int err; |
| |
| err = ksmbd_vfs_getxattr(idmap, 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 mnt_idmap *idmap, |
| struct dentry *dentry, |
| struct ksmbd_kstat *ksmbd_kstat) |
| { |
| u64 time; |
| int rc; |
| |
| generic_fillattr(idmap, STATX_BASIC_STATS, 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(idmap, 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 mnt_idmap *idmap, |
| 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(idmap, 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); |
| 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); |
| 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 = vfs_copy_file_range(src_fp->filp, src_off, |
| dst_fp->filp, dst_off, len, |
| COPY_FILE_SPLICE); |
| 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 mnt_idmap *idmap, |
| struct path *path) |
| { |
| struct posix_acl_state acl_state; |
| struct posix_acl *acls; |
| struct dentry *dentry = path->dentry; |
| struct inode *inode = d_inode(dentry); |
| 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 = mnt_want_write(path->mnt); |
| if (rc) |
| goto out_err; |
| |
| rc = set_posix_acl(idmap, dentry, 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(idmap, dentry, ACL_TYPE_DEFAULT, acls); |
| if (rc < 0) |
| ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", |
| rc); |
| } |
| mnt_drop_write(path->mnt); |
| |
| out_err: |
| free_acl_state(&acl_state); |
| posix_acl_release(acls); |
| return rc; |
| } |
| |
| int ksmbd_vfs_inherit_posix_acl(struct mnt_idmap *idmap, |
| struct path *path, struct inode *parent_inode) |
| { |
| struct posix_acl *acls; |
| struct posix_acl_entry *pace; |
| struct dentry *dentry = path->dentry; |
| struct inode *inode = d_inode(dentry); |
| int rc, i; |
| |
| if (!IS_ENABLED(CONFIG_FS_POSIX_ACL)) |
| return -EOPNOTSUPP; |
| |
| acls = get_inode_acl(parent_inode, ACL_TYPE_DEFAULT); |
| if (IS_ERR_OR_NULL(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 = mnt_want_write(path->mnt); |
| if (rc) |
| goto out_err; |
| |
| rc = set_posix_acl(idmap, dentry, 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(idmap, dentry, ACL_TYPE_DEFAULT, |
| acls); |
| if (rc < 0) |
| ksmbd_debug(SMB, "Set posix acl(ACL_TYPE_DEFAULT) failed, rc : %d\n", |
| rc); |
| } |
| mnt_drop_write(path->mnt); |
| |
| out_err: |
| posix_acl_release(acls); |
| return rc; |
| } |