xfs_file.c (00acb28d96746f78389f23a7b5309a917b45c12f) xfs_file.c (ee20808d848c87a51e176706d81b95a21747d6cf)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"

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34#include <linux/mount.h>
35
36static const struct vm_operations_struct xfs_file_vm_ops;
37
38/*
39 * Decide if the given file range is aligned to the size of the fundamental
40 * allocation unit for the file.
41 */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"

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34#include <linux/mount.h>
35
36static const struct vm_operations_struct xfs_file_vm_ops;
37
38/*
39 * Decide if the given file range is aligned to the size of the fundamental
40 * allocation unit for the file.
41 */
42static bool
42bool
43xfs_is_falloc_aligned(
44 struct xfs_inode *ip,
45 loff_t pos,
46 long long int len)
47{
43xfs_is_falloc_aligned(
44 struct xfs_inode *ip,
45 loff_t pos,
46 long long int len)
47{
48 struct xfs_mount *mp = ip->i_mount;
49 uint64_t mask;
48 unsigned int alloc_unit = xfs_inode_alloc_unitsize(ip);
50
49
51 if (XFS_IS_REALTIME_INODE(ip)) {
52 if (!is_power_of_2(mp->m_sb.sb_rextsize)) {
53 u64 rextbytes;
54 u32 mod;
50 if (!is_power_of_2(alloc_unit)) {
51 u32 mod;
55
52
56 rextbytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
57 div_u64_rem(pos, rextbytes, &mod);
58 if (mod)
59 return false;
60 div_u64_rem(len, rextbytes, &mod);
61 return mod == 0;
62 }
63 mask = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize) - 1;
64 } else {
65 mask = mp->m_sb.sb_blocksize - 1;
53 div_u64_rem(pos, alloc_unit, &mod);
54 if (mod)
55 return false;
56 div_u64_rem(len, alloc_unit, &mod);
57 return mod == 0;
66 }
67
58 }
59
68 return !((pos | len) & mask);
60 return !((pos | len) & (alloc_unit - 1));
69}
70
71/*
72 * Fsync operations on directories are much simpler than on regular files,
73 * as there is no file data to flush, and thus also no need for explicit
74 * cache flush operations, and there are no non-transaction metadata updates
75 * on directories either.
76 */

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62
63/*
64 * Fsync operations on directories are much simpler than on regular files,
65 * as there is no file data to flush, and thus also no need for explicit
66 * cache flush operations, and there are no non-transaction metadata updates
67 * on directories either.
68 */

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