Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : 
       3             : #ifndef _LINUX_FILEATTR_H
       4             : #define _LINUX_FILEATTR_H
       5             : 
       6             : /* Flags shared betwen flags/xflags */
       7             : #define FS_COMMON_FL \
       8             :         (FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \
       9             :          FS_NODUMP_FL | FS_NOATIME_FL | FS_DAX_FL | \
      10             :          FS_PROJINHERIT_FL)
      11             : 
      12             : #define FS_XFLAG_COMMON \
      13             :         (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \
      14             :          FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \
      15             :          FS_XFLAG_PROJINHERIT)
      16             : 
      17             : /*
      18             :  * Merged interface for miscellaneous file attributes.  'flags' originates from
      19             :  * ext* and 'fsx_flags' from xfs.  There's some overlap between the two, which
      20             :  * is handled by the VFS helpers, so filesystems are free to implement just one
      21             :  * or both of these sub-interfaces.
      22             :  */
      23             : struct fileattr {
      24             :         u32     flags;          /* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */
      25             :         /* struct fsxattr: */
      26             :         u32     fsx_xflags;     /* xflags field value (get/set) */
      27             :         u32     fsx_extsize;    /* extsize field value (get/set)*/
      28             :         u32     fsx_nextents;   /* nextents field value (get)   */
      29             :         u32     fsx_projid;     /* project identifier (get/set) */
      30             :         u32     fsx_cowextsize; /* CoW extsize field value (get/set)*/
      31             :         /* selectors: */
      32             :         bool    flags_valid:1;
      33             :         bool    fsx_valid:1;
      34             : };
      35             : 
      36             : int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa);
      37             : 
      38             : void fileattr_fill_xflags(struct fileattr *fa, u32 xflags);
      39             : void fileattr_fill_flags(struct fileattr *fa, u32 flags);
      40             : 
      41             : /**
      42             :  * fileattr_has_fsx - check for extended flags/attributes
      43             :  * @fa:         fileattr pointer
      44             :  *
      45             :  * Return: true if any attributes are present that are not represented in
      46             :  * ->flags.
      47             :  */
      48        4116 : static inline bool fileattr_has_fsx(const struct fileattr *fa)
      49             : {
      50        4116 :         return fa->fsx_valid &&
      51        3612 :                 ((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 ||
      52        3612 :                  fa->fsx_projid != 0 ||      fa->fsx_cowextsize != 0);
      53             : }
      54             : 
      55             : int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
      56             : int vfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
      57             :                      struct fileattr *fa);
      58             : 
      59             : #endif /* _LINUX_FILEATTR_H */