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authorDarrick J. Wong <djwong@kernel.org>2024-04-15 14:54:10 -0700
committerDarrick J. Wong <djwong@kernel.org>2024-04-15 14:54:10 -0700
commitee20808d848c87a51e176706d81b95a21747d6cf (patch)
treeadd477fbbb621a637f4b3cd163d6b68ff40dfc64 /fs/xfs/xfs_file.c
parent00acb28d96746f78389f23a7b5309a917b45c12f (diff)
xfs: create a new helper to return a file's allocation unit
Create a new helper function to calculate the fundamental allocation unit (i.e. the smallest unit of space we can allocate) of a file. Things are going to get hairy with range-exchange on the realtime device, so prepare for this now. Remove the static attribute from xfs_is_falloc_aligned since the next patch will need it. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_file.c')
-rw-r--r--fs/xfs/xfs_file.c32
1 files changed, 12 insertions, 20 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 9961d4b5efbe..64278f8acaee 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -39,33 +39,25 @@ 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
+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;
+ unsigned int alloc_unit = xfs_inode_alloc_unitsize(ip);
+
+ if (!is_power_of_2(alloc_unit)) {
+ u32 mod;
+
+ div_u64_rem(pos, alloc_unit, &mod);
+ if (mod)
+ return false;
+ div_u64_rem(len, alloc_unit, &mod);
+ return mod == 0;
}
- return !((pos | len) & mask);
+ return !((pos | len) & (alloc_unit - 1));
}
/*