fs/ksmbd/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
  16 #include "smbacl.h"
  17 #include "xattr.h"
  18
  19 /*
  20  * Enumeration for stream type.
  21  */
  22 enum {
  23         DATA_STREAM     = 1,    /* type $DATA */
  24         DIR_STREAM              /* type $INDEX_ALLOCATION */
  25 };
  26
  27 /* CreateOptions */
  28 /* Flag is set, it must not be a file , valid for directory only */
  29 #define FILE_DIRECTORY_FILE_LE                  cpu_to_le32(0x00000001)
  30 #define FILE_WRITE_THROUGH_LE                   cpu_to_le32(0x00000002)
  31 #define FILE_SEQUENTIAL_ONLY_LE                 cpu_to_le32(0x00000004)
  32
  33 /* Should not buffer on server*/
  34 #define FILE_NO_INTERMEDIATE_BUFFERING_LE       cpu_to_le32(0x00000008)
  35 /* MBZ */
  36 #define FILE_SYNCHRONOUS_IO_ALERT_LE            cpu_to_le32(0x00000010)
  37 /* MBZ */
  38 #define FILE_SYNCHRONOUS_IO_NONALERT_LE         cpu_to_le32(0x00000020)
  39
  40 /* Flaf must not be set for directory */
  41 #define FILE_NON_DIRECTORY_FILE_LE              cpu_to_le32(0x00000040)
  42
  43 /* Should be zero */
  44 #define CREATE_TREE_CONNECTION                  cpu_to_le32(0x00000080)
  45 #define FILE_COMPLETE_IF_OPLOCKED_LE            cpu_to_le32(0x00000100)
  46 #define FILE_NO_EA_KNOWLEDGE_LE                 cpu_to_le32(0x00000200)
  47 #define FILE_OPEN_REMOTE_INSTANCE               cpu_to_le32(0x00000400)
  48
  49 /**
  50  * Doc says this is obsolete "open for recovery" flag should be zero
  51  * in any case.
  52  */
  53 #define CREATE_OPEN_FOR_RECOVERY                cpu_to_le32(0x00000400)
  54 #define FILE_RANDOM_ACCESS_LE                   cpu_to_le32(0x00000800)
  55 #define FILE_DELETE_ON_CLOSE_LE                 cpu_to_le32(0x00001000)
  56 #define FILE_OPEN_BY_FILE_ID_LE                 cpu_to_le32(0x00002000)
  57 #define FILE_OPEN_FOR_BACKUP_INTENT_LE          cpu_to_le32(0x00004000)
  58 #define FILE_NO_COMPRESSION_LE                  cpu_to_le32(0x00008000)
  59
  60 /* Should be zero*/
  61 #define FILE_OPEN_REQUIRING_OPLOCK              cpu_to_le32(0x00010000)
  62 #define FILE_DISALLOW_EXCLUSIVE                 cpu_to_le32(0x00020000)
  63 #define FILE_RESERVE_OPFILTER_LE                cpu_to_le32(0x00100000)
  64 #define FILE_OPEN_REPARSE_POINT_LE              cpu_to_le32(0x00200000)
  65 #define FILE_OPEN_NO_RECALL_LE                  cpu_to_le32(0x00400000)
  66
  67 /* Should be zero */
  68 #define FILE_OPEN_FOR_FREE_SPACE_QUERY_LE       cpu_to_le32(0x00800000)
  69 #define CREATE_OPTIONS_MASK                     cpu_to_le32(0x00FFFFFF)
  70 #define CREATE_OPTION_READONLY                  0x10000000
  71 /* system. NB not sent over wire */
  72 #define CREATE_OPTION_SPECIAL                   0x20000000
  73
  74 struct ksmbd_work;
  75 struct ksmbd_file;
  76 struct ksmbd_conn;
  77
  78 struct ksmbd_dir_info {
  79         const char      *name;
  80         char            *wptr;
  81         char            *rptr;
  82         int             name_len;
  83         int             out_buf_len;
  84         int             num_entry;
  85         int             data_count;
  86         int             last_entry_offset;
  87         bool            hide_dot_file;
  88         int             flags;
  89 };
  90
  91 struct ksmbd_readdir_data {
  92         struct dir_context      ctx;
  93         union {
  94                 void            *private;
  95                 char            *dirent;
  96         };
  97
  98         unsigned int            used;
  99         unsigned int            dirent_count;
 100         unsigned int            file_attr;
 101 };
 102
 103 /* ksmbd kstat wrapper to get valid create time when reading dir entry */
 104 struct ksmbd_kstat {
 105         struct kstat            *kstat;
 106         unsigned long long      create_time;
 107         __le32                  file_attributes;
 108 };
 109
 110 int ksmbd_vfs_lock_parent(struct user_namespace *user_ns, struct dentry *parent,
 111                           struct dentry *child);
 112 int ksmbd_vfs_may_delete(struct user_namespace *user_ns, struct dentry *dentry);
 113 int ksmbd_vfs_query_maximal_access(struct user_namespace *user_ns,
 114                                    struct dentry *dentry, __le32 *daccess);
 115 int ksmbd_vfs_create(struct ksmbd_work *work, const char *name, umode_t mode);
 116 int ksmbd_vfs_mkdir(struct ksmbd_work *work, const char *name, umode_t mode);
 117 int ksmbd_vfs_read(struct ksmbd_work *work, struct ksmbd_file *fp,
 118                    size_t count, loff_t *pos);
 119 int ksmbd_vfs_write(struct ksmbd_work *work, struct ksmbd_file *fp,
 120                     char *buf, size_t count, loff_t *pos, bool sync,
 121                     ssize_t *written);
 122 int ksmbd_vfs_fsync(struct ksmbd_work *work, u64 fid, u64 p_id);
 123 int ksmbd_vfs_remove_file(struct ksmbd_work *work, char *name);
 124 int ksmbd_vfs_link(struct ksmbd_work *work,
 125                    const char *oldname, const char *newname);
 126 int ksmbd_vfs_getattr(struct path *path, struct kstat *stat);
 127 int ksmbd_vfs_fp_rename(struct ksmbd_work *work, struct ksmbd_file *fp,
 128                         char *newname);
 129 int ksmbd_vfs_truncate(struct ksmbd_work *work, const char *name,
 130                        struct ksmbd_file *fp, loff_t size);
 131 struct srv_copychunk;
 132 int ksmbd_vfs_copy_file_ranges(struct ksmbd_work *work,
 133                                struct ksmbd_file *src_fp,
 134                                struct ksmbd_file *dst_fp,
 135                                struct srv_copychunk *chunks,
 136                                unsigned int chunk_count,
 137                                unsigned int *chunk_count_written,
 138                                unsigned int *chunk_size_written,
 139                                loff_t  *total_size_written);
 140 ssize_t ksmbd_vfs_listxattr(struct dentry *dentry, char **list);
 141 ssize_t ksmbd_vfs_getxattr(struct user_namespace *user_ns,
 142                            struct dentry *dentry,
 143                            char *xattr_name,
 144                            char **xattr_buf);
 145 ssize_t ksmbd_vfs_casexattr_len(struct user_namespace *user_ns,
 146                                 struct dentry *dentry, char *attr_name,
 147                                 int attr_name_len);
 148 int ksmbd_vfs_setxattr(struct user_namespace *user_ns,
 149                        struct dentry *dentry, const char *attr_name,
 150                        const void *attr_value, size_t attr_size, int flags);
 151 int ksmbd_vfs_xattr_stream_name(char *stream_name, char **xattr_stream_name,
 152                                 size_t *xattr_stream_name_size, int s_type);
 153 int ksmbd_vfs_remove_xattr(struct user_namespace *user_ns,
 154                            struct dentry *dentry, char *attr_name);
 155 int ksmbd_vfs_kern_path(char *name, unsigned int flags, struct path *path,
 156                         bool caseless);
 157 int ksmbd_vfs_empty_dir(struct ksmbd_file *fp);
 158 void ksmbd_vfs_set_fadvise(struct file *filp, __le32 option);
 159 int ksmbd_vfs_zero_data(struct ksmbd_work *work, struct ksmbd_file *fp,
 160                         loff_t off, loff_t len);
 161 struct file_allocated_range_buffer;
 162 int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,
 163                          struct file_allocated_range_buffer *ranges,
 164                          int in_count, int *out_count);
 165 int ksmbd_vfs_unlink(struct user_namespace *user_ns,
 166                      struct dentry *dir, struct dentry *dentry);
 167 void *ksmbd_vfs_init_kstat(char **p, struct ksmbd_kstat *ksmbd_kstat);
 168 int ksmbd_vfs_fill_dentry_attrs(struct ksmbd_work *work,
 169                                 struct user_namespace *user_ns,
 170                                 struct dentry *dentry,
 171                                 struct ksmbd_kstat *ksmbd_kstat);
 172 void ksmbd_vfs_posix_lock_wait(struct file_lock *flock);
 173 int ksmbd_vfs_posix_lock_wait_timeout(struct file_lock *flock, long timeout);
 174 void ksmbd_vfs_posix_lock_unblock(struct file_lock *flock);
 175 int ksmbd_vfs_remove_acl_xattrs(struct user_namespace *user_ns,
 176                                 struct dentry *dentry);
 177 int ksmbd_vfs_remove_sd_xattrs(struct user_namespace *user_ns,
 178                                struct dentry *dentry);
 179 int ksmbd_vfs_set_sd_xattr(struct ksmbd_conn *conn,
 180                            struct user_namespace *user_ns,
 181                            struct dentry *dentry,
 182                            struct smb_ntsd *pntsd, int len);
 183 int ksmbd_vfs_get_sd_xattr(struct ksmbd_conn *conn,
 184                            struct user_namespace *user_ns,
 185                            struct dentry *dentry,
 186                            struct smb_ntsd **pntsd);
 187 int ksmbd_vfs_set_dos_attrib_xattr(struct user_namespace *user_ns,
 188                                    struct dentry *dentry,
 189                                    struct xattr_dos_attrib *da);
 190 int ksmbd_vfs_get_dos_attrib_xattr(struct user_namespace *user_ns,
 191                                    struct dentry *dentry,
 192                                    struct xattr_dos_attrib *da);
 193 int ksmbd_vfs_set_init_posix_acl(struct user_namespace *user_ns,
 194                                  struct inode *inode);
 195 int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns,
 196                                 struct inode *inode,
 197                                 struct inode *parent_inode);
 198 #endif /* __KSMBD_VFS_H__ */