1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux 1 2 #ifndef _UAPI_FALLOC_H_ 3 #define _UAPI_FALLOC_H_ 4 5 #define FALLOC_FL_ALLOCATE_RANGE 0x00 /* alloc 6 #define FALLOC_FL_KEEP_SIZE 0x01 /* defaul 7 #define FALLOC_FL_PUNCH_HOLE 0x02 /* de-all 8 #define FALLOC_FL_NO_HIDE_STALE 0x04 /* reserv 9 10 /* 11 * FALLOC_FL_COLLAPSE_RANGE is used to remove 12 * without leaving a hole in the file. The con 13 * the range being removed is appended to the 14 * being removed (i.e. the hole that was punch 15 * resulting in a file layout that looks like 16 * removed never existed. As such collapsing a 17 * the size of the file, reducing it by the sa 18 * that has been removed by the operation. 19 * 20 * Different filesystems may implement differe 21 * granularity of the operation. Most will lim 22 * filesystem block size boundaries, but this 23 * smaller depending on the filesystem and/or 24 * filesystem or file. 25 * 26 * Attempting to collapse a range that crosses 27 * considered an illegal operation - just use 28 * to collapse a range that crosses EOF. 29 */ 30 #define FALLOC_FL_COLLAPSE_RANGE 0x08 31 32 /* 33 * FALLOC_FL_ZERO_RANGE is used to convert a r 34 * without issuing data IO. Blocks should be p 35 * span holes in the file, and the entire rang 36 * unwritten extents - even though file system 37 * extent or do whatever which will result in 38 * while the range remains allocated for the f 39 * 40 * This can be also used to preallocate blocks 41 * with fallocate. Flag FALLOC_FL_KEEP_SIZE sh 42 * size to remain the same. 43 */ 44 #define FALLOC_FL_ZERO_RANGE 0x10 45 46 /* 47 * FALLOC_FL_INSERT_RANGE is use to insert spa 48 * overwriting any existing data. The contents 49 * shifted towards right by len bytes to creat 50 * operation will increase the size of the fil 51 * 52 * Different filesystems may implement differe 53 * of the operation. Most will limit operation 54 * boundaries, but this boundary may be larger 55 * the filesystem and/or the configuration of 56 * 57 * Attempting to insert space using this flag 58 * the file is considered an illegal operation 59 * fallocate(2) with mode 0 for such type of o 60 */ 61 #define FALLOC_FL_INSERT_RANGE 0x20 62 63 /* 64 * FALLOC_FL_UNSHARE_RANGE is used to unshare 65 * file size without overwriting any existing 66 * call is to preemptively reallocate any bloc 67 * copy-on-write. 68 * 69 * Different filesystems may implement differe 70 * granularity of the operation. Most will lim 71 * block size boundaries, but this boundary ma 72 * depending on the filesystem and/or the conf 73 * or file. 74 * 75 * This flag can only be used with allocate-mo 76 * to say that it cannot be used with the punc 77 * insert range modes. 78 */ 79 #define FALLOC_FL_UNSHARE_RANGE 0x40 80 81 #endif /* _UAPI_FALLOC_H_ */ 82
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