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4609e1f18e
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
168 lines
5.7 KiB
C
168 lines
5.7 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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#ifndef __KSMBD_VFS_H__
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#define __KSMBD_VFS_H__
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/namei.h>
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#include <uapi/linux/xattr.h>
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#include <linux/posix_acl.h>
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#include <linux/unicode.h>
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#include "smbacl.h"
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#include "xattr.h"
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/*
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* Enumeration for stream type.
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*/
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enum {
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DATA_STREAM = 1, /* type $DATA */
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DIR_STREAM /* type $INDEX_ALLOCATION */
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};
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/* CreateOptions */
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#define CREATE_TREE_CONNECTION cpu_to_le32(0x00000080)
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#define FILE_RESERVE_OPFILTER_LE cpu_to_le32(0x00100000)
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#define CREATE_OPTION_READONLY 0x10000000
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/* system. NB not sent over wire */
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#define CREATE_OPTION_SPECIAL 0x20000000
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struct ksmbd_work;
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struct ksmbd_file;
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struct ksmbd_conn;
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struct ksmbd_dir_info {
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const char *name;
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char *wptr;
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char *rptr;
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int name_len;
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int out_buf_len;
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int num_entry;
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int data_count;
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int last_entry_offset;
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bool hide_dot_file;
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int flags;
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int last_entry_off_align;
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};
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struct ksmbd_readdir_data {
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struct dir_context ctx;
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union {
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void *private;
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char *dirent;
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};
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unsigned int used;
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unsigned int dirent_count;
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unsigned int file_attr;
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struct unicode_map *um;
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};
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/* ksmbd kstat wrapper to get valid create time when reading dir entry */
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struct ksmbd_kstat {
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struct kstat *kstat;
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unsigned long long create_time;
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__le32 file_attributes;
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};
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int ksmbd_vfs_lock_parent(struct mnt_idmap *idmap, struct dentry *parent,
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struct dentry *child);
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int ksmbd_vfs_may_delete(struct mnt_idmap *idmap, struct dentry *dentry);
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int ksmbd_vfs_query_maximal_access(struct mnt_idmap *idmap,
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struct dentry *dentry, __le32 *daccess);
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int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode);
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int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode);
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int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp,
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size_t count, loff_t *pos);
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int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
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char *buf, size_t count, loff_t *pos, bool sync,
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ssize_t *written);
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int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id);
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int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name);
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int ksmbd_vfs_link(struct ksmbd_work *work,
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const char *oldname, const char *newname);
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int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat);
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int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
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char *newname);
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int ksmbd_vfs_truncate(struct ksmbd_work *work,
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struct ksmbd_file *fp, loff_t size);
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struct srv_copychunk;
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int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
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struct ksmbd_file *src_fp,
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struct ksmbd_file *dst_fp,
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struct srv_copychunk *chunks,
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unsigned int chunk_count,
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unsigned int *chunk_count_written,
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unsigned int *chunk_size_written,
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loff_t *total_size_written);
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ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list);
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ssize_t ksmbd_vfs_getxattr(struct mnt_idmap *idmap,
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struct dentry *dentry,
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char *xattr_name,
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char **xattr_buf);
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ssize_t ksmbd_vfs_casexattr_len(struct mnt_idmap *idmap,
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struct dentry *dentry, char *attr_name,
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int attr_name_len);
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int ksmbd_vfs_setxattr(struct mnt_idmap *idmap,
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struct dentry *dentry, const char *attr_name,
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void *attr_value, size_t attr_size, int flags);
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int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
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size_t *xattr_stream_name_size, int s_type);
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int ksmbd_vfs_remove_xattr(struct mnt_idmap *idmap,
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struct dentry *dentry, char *attr_name);
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int ksmbd_vfs_kern_path(struct ksmbd_work *work,
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char *name, unsigned int flags, struct path *path,
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bool caseless);
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struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
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const char *name,
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unsigned int flags,
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struct path *path);
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int ksmbd_vfs_empty_dir(struct ksmbd_file *fp);
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void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option);
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int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
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loff_t off, loff_t len);
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struct file_allocated_range_buffer;
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int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
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struct file_allocated_range_buffer *ranges,
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unsigned int in_count, unsigned int *out_count);
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int ksmbd_vfs_unlink(struct mnt_idmap *idmap, struct dentry *dir,
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struct dentry *dentry);
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void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat);
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int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
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struct mnt_idmap *idmap,
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struct dentry *dentry,
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struct ksmbd_kstat *ksmbd_kstat);
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void ksmbd_vfs_posix_lock_wait(struct file_lock *flock);
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int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout);
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void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock);
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int ksmbd_vfs_remove_acl_xattrs(struct mnt_idmap *idmap,
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struct dentry *dentry);
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int ksmbd_vfs_remove_sd_xattrs(struct mnt_idmap *idmap,
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struct dentry *dentry);
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int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
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struct mnt_idmap *idmap,
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struct dentry *dentry,
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struct smb_ntsd *pntsd, int len);
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int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
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struct mnt_idmap *idmap,
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struct dentry *dentry,
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struct smb_ntsd **pntsd);
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int ksmbd_vfs_set_dos_attrib_xattr(struct mnt_idmap *idmap,
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struct dentry *dentry,
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struct xattr_dos_attrib *da);
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int ksmbd_vfs_get_dos_attrib_xattr(struct mnt_idmap *idmap,
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struct dentry *dentry,
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struct xattr_dos_attrib *da);
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int ksmbd_vfs_set_init_posix_acl(struct mnt_idmap *idmap,
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struct dentry *dentry);
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int ksmbd_vfs_inherit_posix_acl(struct mnt_idmap *idmap,
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struct dentry *dentry,
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struct inode *parent_inode);
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#endif /* __KSMBD_VFS_H__ */
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