fs/smb/server/vfs.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #ifndef __KSMBD_VFS_H__
   8 #define __KSMBD_VFS_H__
   9
  10 #include <linux/file.h>
  11 #include <linux/fs.h>
  12 #include <linux/namei.h>
  13 #include <uapi/linux/xattr.h>
  14 #include <linux/posix_acl.h>
  15 #include <linux/unicode.h>
  16
  17 #include "smbacl.h"
  18 #include "xattr.h"
  19
  20 /*
  21  * Enumeration for stream type.
  22  */
  23 enum {
  24         DATA_STREAM     = 1,    /* type $DATA */
  25         DIR_STREAM              /* type $INDEX_ALLOCATION */
  26 };
  27
  28 /* CreateOptions */
  29 #define CREATE_TREE_CONNECTION                  cpu_to_le32(0x00000080)
  30 #define FILE_RESERVE_OPFILTER_LE                cpu_to_le32(0x00100000)
  31
  32 #define CREATE_OPTION_READONLY                  0x10000000
  33 /* system. NB not sent over wire */
  34 #define CREATE_OPTION_SPECIAL                   0x20000000
  35
  36 struct ksmbd_work;
  37 struct ksmbd_file;
  38 struct ksmbd_conn;
  39
  40 struct ksmbd_dir_info {
  41         const char      *name;
  42         char            *wptr;
  43         char            *rptr;
  44         int             name_len;
  45         int             out_buf_len;
  46         int             num_entry;
  47         int             data_count;
  48         int             last_entry_offset;
  49         bool            hide_dot_file;
  50         int             flags;
  51         int             last_entry_off_align;
  52 };
  53
  54 struct ksmbd_readdir_data {
  55         struct dir_context      ctx;
  56         union {
  57                 void            *private;
  58                 char            *dirent;
  59         };
  60
  61         unsigned int            used;
  62         unsigned int            dirent_count;
  63         unsigned int            file_attr;
  64         struct unicode_map      *um;
  65 };
  66
  67 /* ksmbd kstat wrapper to get valid create time when reading dir entry */
  68 struct ksmbd_kstat {
  69         struct kstat            *kstat;
  70         unsigned long long      create_time;
  71         __le32                  file_attributes;
  72 };
  73
  74 int ksmbd_vfs_lock_parent(struct dentry *parent, struct dentry *child);
  75 void ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
  76                                    struct dentry *dentry, __le32 *daccess);
  77 int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode);
  78 int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode);
  79 int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp, size_t count,
  80                    loff_t *pos, char *rbuf);
  81 int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
  82                     char *buf, size_t count, loff_t *pos, bool sync,
  83                     ssize_t *written);
  84 int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id);
  85 int ksmbd_vfs_remove_file(struct ksmbd_work *work, const struct path *path);
  86 int ksmbd_vfs_link(struct ksmbd_work *work,
  87                    const char *oldname, const char *newname);
  88 int ksmbd_vfs_getattr(const struct path *path, struct kstat *stat);
  89 int ksmbd_vfs_rename(struct ksmbd_work *work, const struct path *old_path,
  90                      char *newname, int flags);
  91 int ksmbd_vfs_truncate(struct ksmbd_work *work,
  92                        struct ksmbd_file *fp, loff_t size);
  93 struct srv_copychunk;
  94 int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
  95                                struct ksmbd_file *src_fp,
  96                                struct ksmbd_file *dst_fp,
  97                                struct srv_copychunk *chunks,
  98                                unsigned int chunk_count,
  99                                unsigned int *chunk_count_written,
 100                                unsigned int *chunk_size_written,
 101                                loff_t  *total_size_written);
 102 ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list);
 103 ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns,
 104                            struct dentry *dentry,
 105                            char *xattr_name,
 106                            char **xattr_buf);
 107 ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns,
 108                                 struct dentry *dentry, char *attr_name,
 109                                 int attr_name_len);
 110 int ksmbd_vfs_setxattr(struct user_namespace *user_ns,
 111                        const struct path *path, const char *attr_name,
 112                        void *attr_value, size_t attr_size, int flags,
 113                        bool get_write);
 114 int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
 115                                 size_t *xattr_stream_name_size, int s_type);
 116 int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns,
 117                            const struct path *path, char *attr_name);
 118 int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
 119                                unsigned int flags, struct path *parent_path,
 120                                struct path *path, bool caseless);
 121 void ksmbd_vfs_kern_path_unlock(struct path *parent_path, struct path *path);
 122 struct dentry *ksmbd_vfs_kern_path_create(struct ksmbd_work *work,
 123                                           const char *name,
 124                                           unsigned int flags,
 125                                           struct path *path);
 126 int ksmbd_vfs_empty_dir(struct ksmbd_file *fp);
 127 void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option);
 128 int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
 129                         loff_t off, loff_t len);
 130 struct file_allocated_range_buffer;
 131 int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
 132                          struct file_allocated_range_buffer *ranges,
 133                          unsigned int in_count, unsigned int *out_count);
 134 int ksmbd_vfs_unlink(struct file *filp);
 135 void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat);
 136 int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
 137                                 struct user_namespace *user_ns,
 138                                 struct dentry *dentry,
 139                                 struct ksmbd_kstat *ksmbd_kstat);
 140 void ksmbd_vfs_posix_lock_wait(struct file_lock *flock);
 141 int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout);
 142 void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock);
 143 int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns,
 144                                 const struct path *path);
 145 int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns, const struct path *path);
 146 int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
 147                            struct user_namespace *user_ns,
 148                            const struct path *path,
 149                            struct smb_ntsd *pntsd, int len,
 150                            bool get_write);
 151 int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
 152                            struct user_namespace *user_ns,
 153                            struct dentry *dentry,
 154                            struct smb_ntsd **pntsd);
 155 int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns,
 156                                    const struct path *path,
 157                                    struct xattr_dos_attrib *da,
 158                                    bool get_write);
 159 int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns,
 160                                    struct dentry *dentry,
 161                                    struct xattr_dos_attrib *da);
 162 int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns,
 163                                  struct path *path);
 164 int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns,
 165                                 struct path *path,
 166                                 struct inode *parent_inode);
 167 #endif /* __KSMBD_VFS_H__ */