| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | |
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| 3 | #ifndef _LINUX_FILEATTR_H |
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| 4 | #define _LINUX_FILEATTR_H |
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| 5 | |
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| 6 | /* Flags shared betwen flags/xflags */ |
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| 7 | #define FS_COMMON_FL \ |
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| 8 | (FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
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| 9 | FS_NODUMP_FL | FS_NOATIME_FL | FS_DAX_FL | \ |
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| 10 | FS_PROJINHERIT_FL) |
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| 11 | |
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| 12 | #define FS_XFLAG_COMMON \ |
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| 13 | (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \ |
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| 14 | FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \ |
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| 15 | FS_XFLAG_PROJINHERIT) |
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| 16 | |
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| 17 | /* |
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| 18 | * Merged interface for miscellaneous file attributes. 'flags' originates from |
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| 19 | * ext* and 'fsx_flags' from xfs. There's some overlap between the two, which |
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| 20 | * is handled by the VFS helpers, so filesystems are free to implement just one |
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| 21 | * or both of these sub-interfaces. |
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| 22 | */ |
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| 23 | struct fileattr { |
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| 24 | u32 flags; /* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */ |
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| 25 | /* struct fsxattr: */ |
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| 26 | u32 fsx_xflags; /* xflags field value (get/set) */ |
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| 27 | u32 fsx_extsize; /* extsize field value (get/set)*/ |
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| 28 | u32 fsx_nextents; /* nextents field value (get) */ |
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| 29 | u32 fsx_projid; /* project identifier (get/set) */ |
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| 30 | u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ |
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| 31 | /* selectors: */ |
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| 32 | bool flags_valid:1; |
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| 33 | bool fsx_valid:1; |
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| 34 | }; |
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| 35 | |
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| 36 | int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa); |
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| 37 | |
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| 38 | void fileattr_fill_xflags(struct fileattr *fa, u32 xflags); |
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| 39 | void fileattr_fill_flags(struct fileattr *fa, u32 flags); |
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| 40 | |
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| 41 | /** |
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| 42 | * fileattr_has_fsx - check for extended flags/attributes |
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| 43 | * @fa: fileattr pointer |
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| 44 | * |
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| 45 | * Return: true if any attributes are present that are not represented in |
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| 46 | * ->flags. |
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| 47 | */ |
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| 48 | static inline bool fileattr_has_fsx(const struct fileattr *fa) |
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| 49 | { |
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| 50 | return fa->fsx_valid && |
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| 51 | ((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 || |
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| 52 | fa->fsx_projid != 0 || fa->fsx_cowextsize != 0); |
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| 53 | } |
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| 54 | |
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| 55 | int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa); |
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| 56 | int vfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry, |
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| 57 | struct fileattr *fa); |
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| 58 | |
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| 59 | #endif /* _LINUX_FILEATTR_H */ |
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| 60 | |
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