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Diffstat (limited to 'fs/xfs/xfs_file.c')
-rw-r--r--fs/xfs/xfs_file.c40
1 files changed, 35 insertions, 5 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 3d1b95124744..5b0f93f73837 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -32,6 +32,39 @@
static const struct vm_operations_struct xfs_file_vm_ops;
+/*
+ * Decide if the given file range is aligned to the size of the fundamental
+ * allocation unit for the file.
+ */
+static bool
+xfs_is_falloc_aligned(
+ struct xfs_inode *ip,
+ loff_t pos,
+ long long int len)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ uint64_t mask;
+
+ if (XFS_IS_REALTIME_INODE(ip)) {
+ if (!is_power_of_2(mp->m_sb.sb_rextsize)) {
+ u64 rextbytes;
+ u32 mod;
+
+ rextbytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
+ div_u64_rem(pos, rextbytes, &mod);
+ if (mod)
+ return false;
+ div_u64_rem(len, rextbytes, &mod);
+ return mod == 0;
+ }
+ mask = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize) - 1;
+ } else {
+ mask = mp->m_sb.sb_blocksize - 1;
+ }
+
+ return !((pos | len) & mask);
+}
+
int
xfs_update_prealloc_flags(
struct xfs_inode *ip,
@@ -850,9 +883,7 @@ xfs_file_fallocate(
if (error)
goto out_unlock;
} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
- unsigned int blksize_mask = i_blocksize(inode) - 1;
-
- if (offset & blksize_mask || len & blksize_mask) {
+ if (!xfs_is_falloc_aligned(ip, offset, len)) {
error = -EINVAL;
goto out_unlock;
}
@@ -872,10 +903,9 @@ xfs_file_fallocate(
if (error)
goto out_unlock;
} else if (mode & FALLOC_FL_INSERT_RANGE) {
- unsigned int blksize_mask = i_blocksize(inode) - 1;
loff_t isize = i_size_read(inode);
- if (offset & blksize_mask || len & blksize_mask) {
+ if (!xfs_is_falloc_aligned(ip, offset, len)) {
error = -EINVAL;
goto out_unlock;
}

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