60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_FILEATTR_H
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#define _LINUX_FILEATTR_H
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/* Flags shared betwen flags/xflags */
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#define FS_COMMON_FL \
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(FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \
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FS_NODUMP_FL | FS_NOATIME_FL | FS_DAX_FL | \
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FS_PROJINHERIT_FL)
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#define FS_XFLAG_COMMON \
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(FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \
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FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \
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FS_XFLAG_PROJINHERIT)
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/*
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* Merged interface for miscellaneous file attributes. 'flags' originates from
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* ext* and 'fsx_flags' from xfs. There's some overlap between the two, which
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* is handled by the VFS helpers, so filesystems are free to implement just one
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* or both of these sub-interfaces.
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*/
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struct fileattr {
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u32 flags; /* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */
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/* struct fsxattr: */
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u32 fsx_xflags; /* xflags field value (get/set) */
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u32 fsx_extsize; /* extsize field value (get/set)*/
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u32 fsx_nextents; /* nextents field value (get) */
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u32 fsx_projid; /* project identifier (get/set) */
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u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
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/* selectors: */
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bool flags_valid:1;
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bool fsx_valid:1;
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};
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int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa);
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void fileattr_fill_xflags(struct fileattr *fa, u32 xflags);
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void fileattr_fill_flags(struct fileattr *fa, u32 flags);
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/**
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* fileattr_has_fsx - check for extended flags/attributes
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* @fa: fileattr pointer
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*
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* Return: true if any attributes are present that are not represented in
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* ->flags.
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*/
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static inline bool fileattr_has_fsx(const struct fileattr *fa)
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{
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return fa->fsx_valid &&
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((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 ||
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fa->fsx_projid != 0 || fa->fsx_cowextsize != 0);
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}
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int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
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int vfs_fileattr_set(struct user_namespace *mnt_userns, struct dentry *dentry,
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struct fileattr *fa);
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#endif /* _LINUX_FILEATTR_H */
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