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1 | #ifndef _LINUX_IFLAGS_H |
2 | #define _LINUX_IFLAGS_H | |
3 | ||
4 | /* | |
5 | * A universal set of inode flags. | |
6 | * | |
7 | * Originally taken from ext2/3 with additions for other filesystems. | |
8 | * Filesystems supporting this interface should interoperate with | |
9 | * the lsattr and chattr command line tools. | |
10 | * | |
11 | * This interface is supported in whole or in part by: | |
12 | * ext2 | |
13 | * ext3 | |
14 | * xfs | |
15 | * jfs | |
16 | * gfs2 | |
17 | * | |
18 | */ | |
19 | ||
20 | #define IFLAGS_GET_IOC _IOR('f', 1, long) | |
21 | #define IFLAGS_SET_IOC _IOW('f', 2, long) | |
22 | ||
23 | /* | |
24 | * These values are provided for use as indices of an array | |
25 | * for use with the iflags_cvt function below | |
26 | */ | |
27 | enum { | |
28 | iflag_SecureRm = 0, /* Secure deletion */ | |
29 | iflag_Unrm = 1, /* Undelete */ | |
30 | iflag_Compress = 2, /* Compress file */ | |
31 | iflag_Sync = 3, /* Synchronous updates */ | |
32 | iflag_Immutable = 4, /* Immutable */ | |
33 | iflag_Append = 5, /* Append */ | |
34 | iflag_NoDump = 6, /* Don't dump file */ | |
35 | iflag_NoAtime = 7, /* No atime updates */ | |
36 | /* Reserved for compression usage */ | |
37 | iflag_Dirty = 8, | |
38 | iflag_ComprBlk = 9, /* One or more compressed clusters */ | |
39 | iflag_NoComp = 10, /* Don't compress */ | |
40 | iflag_Ecompr = 11, /* Compression error */ | |
41 | /* End of compression flags */ | |
42 | iflag_Btree = 12, /* btree format dir */ | |
43 | iflag_Index = 12, /* hash-indexed directory */ | |
44 | iflag_Imagic = 13, /* AFS directory */ | |
45 | iflag_JournalData = 14, /* file data should be journaled */ | |
46 | iflag_NoTail = 15, /* file tail should not be merged */ | |
47 | iflag_DirSync = 16, /* dirsync behaviour */ | |
48 | iflag_TopDir = 17, /* Top of directory hierarchies */ | |
4bcf7091 SW |
49 | iflag_Extent = 19, /* Extents */ |
50 | iflag_DirectIO = 20, /* Always use direct I/O on this file */ | |
7ea9ea83 SW |
51 | iflag_Reserved = 31 /* reserved for ext2/3 lib */ |
52 | }; | |
53 | ||
54 | #define __IFL(x) (1<<(iflag_##x)) | |
55 | #define IFLAG_SECRM __IFL(SecureRm) /* 0x00000001 */ | |
56 | #define IFLAG_UNRM __IFL(Unrm) /* 0x00000002 */ | |
57 | #define IFLAG_COMPR __IFL(Compr) /* 0x00000004 */ | |
58 | #define IFLAG_SYNC __IFL(Sync) /* 0x00000008 */ | |
59 | #define IFLAG_IMMUTABLE __IFL(Immutable) /* 0x00000010 */ | |
60 | #define IFLAG_APPEND __IFL(Append) /* 0x00000020 */ | |
61 | #define IFLAG_NODUMP __IFL(NoDump) /* 0x00000040 */ | |
62 | #define IFLAG_NOATIME __IFL(NoAtime) /* 0x00000080 */ | |
63 | #define IFLAG_DIRTY __IFL(Dirty) /* 0x00000100 */ | |
64 | #define IFLAG_COMPRBLK __IFL(ComprBlk) /* 0x00000200 */ | |
65 | #define IFLAG_NOCOMP __IFL(NoComp) /* 0x00000400 */ | |
66 | #define IFLAG_ECOMPR __IFL(Ecompr) /* 0x00000800 */ | |
67 | #define IFLAG_BTREE __IFL(Btree) /* 0x00001000 */ | |
68 | #define IFLAG_INDEX __IFL(Index) /* 0x00001000 */ | |
69 | #define IFLAG_IMAGIC __IFL(Imagic) /* 0x00002000 */ | |
70 | #define IFLAG_JOURNAL_DATA __IFL(JournalData) /* 0x00004000 */ | |
71 | #define IFLAG_NOTAIL __IFL(NoTail) /* 0x00008000 */ | |
72 | #define IFLAG_DIRSYNC __IFL(DirSync) /* 0x00010000 */ | |
73 | #define IFLAG_TOPDIR __IFL(TopDir) /* 0x00020000 */ | |
4bcf7091 SW |
74 | #define IFLAG_EXTENT __IFL(Extent) /* 0x00080000 */ |
75 | #define IFLAG_DIRECTIO __IFL(DirectIO) /* 0x00100000 */ | |
7ea9ea83 SW |
76 | #define IFLAG_RESERVED __IFL(Reserved) /* 0x80000000 */ |
77 | ||
78 | #ifdef __KERNEL__ | |
79 | /** | |
80 | * iflags_cvt | |
81 | * @table: A table of 32 u32 flags | |
82 | * @val: a 32 bit value to convert | |
83 | * | |
84 | * This function can be used to convert between IFLAGS values and | |
85 | * the filesystem's own flags values. | |
86 | * | |
87 | * Returns: the converted flags | |
88 | */ | |
89 | static inline u32 iflags_cvt(const u32 *table, u32 val) | |
90 | { | |
91 | u32 res = 0; | |
92 | while(val) { | |
93 | if (val & 1) | |
94 | res |= *table; | |
95 | table++; | |
96 | val >>= 1; | |
97 | } | |
98 | return res; | |
99 | } | |
100 | #endif /* __KERNEL__ */ | |
101 | ||
102 | #endif /* _LINUX_IFLAGS_H */ |