xfs: move inode extent size hint validation to libxfs
Extent size hint validation is used by scrub to decide if there's an
error, and it will be used by repair to decide to remove the hint.
Since these use the same validation functions, move them to libxfs.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index 51019e5..cdd4c1d 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -651,3 +651,108 @@ xfs_iread(
xfs_trans_brelse(tp, bp);
return error;
}
+
+/*
+ * Validate di_extsize hint.
+ *
+ * The rules are documented at xfs_ioctl_setattr_check_extsize().
+ * These functions must be kept in sync with each other.
+ */
+xfs_failaddr_t
+xfs_inode_validate_extsize(
+ struct xfs_mount *mp,
+ uint32_t extsize,
+ uint16_t mode,
+ uint16_t flags)
+{
+ bool rt_flag;
+ bool hint_flag;
+ bool inherit_flag;
+ uint32_t extsize_bytes;
+ uint32_t blocksize_bytes;
+
+ rt_flag = (flags & XFS_DIFLAG_REALTIME);
+ hint_flag = (flags & XFS_DIFLAG_EXTSIZE);
+ inherit_flag = (flags & XFS_DIFLAG_EXTSZINHERIT);
+ extsize_bytes = XFS_FSB_TO_B(mp, extsize);
+
+ if (rt_flag)
+ blocksize_bytes = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
+ else
+ blocksize_bytes = mp->m_sb.sb_blocksize;
+
+ if ((hint_flag || inherit_flag) && !(S_ISDIR(mode) || S_ISREG(mode)))
+ return __this_address;
+
+ if (hint_flag && !S_ISREG(mode))
+ return __this_address;
+
+ if (inherit_flag && !S_ISDIR(mode))
+ return __this_address;
+
+ if ((hint_flag || inherit_flag) && extsize == 0)
+ return __this_address;
+
+ if (!(hint_flag || inherit_flag) && extsize != 0)
+ return __this_address;
+
+ if (extsize_bytes % blocksize_bytes)
+ return __this_address;
+
+ if (extsize > MAXEXTLEN)
+ return __this_address;
+
+ if (!rt_flag && extsize > mp->m_sb.sb_agblocks / 2)
+ return __this_address;
+
+ return NULL;
+}
+
+/*
+ * Validate di_cowextsize hint.
+ *
+ * The rules are documented at xfs_ioctl_setattr_check_cowextsize().
+ * These functions must be kept in sync with each other.
+ */
+xfs_failaddr_t
+xfs_inode_validate_cowextsize(
+ struct xfs_mount *mp,
+ uint32_t cowextsize,
+ uint16_t mode,
+ uint16_t flags,
+ uint64_t flags2)
+{
+ bool rt_flag;
+ bool hint_flag;
+ uint32_t cowextsize_bytes;
+
+ rt_flag = (flags & XFS_DIFLAG_REALTIME);
+ hint_flag = (flags2 & XFS_DIFLAG2_COWEXTSIZE);
+ cowextsize_bytes = XFS_FSB_TO_B(mp, cowextsize);
+
+ if (hint_flag && !xfs_sb_version_hasreflink(&mp->m_sb))
+ return __this_address;
+
+ if (hint_flag && !(S_ISDIR(mode) || S_ISREG(mode)))
+ return __this_address;
+
+ if (hint_flag && cowextsize == 0)
+ return __this_address;
+
+ if (!hint_flag && cowextsize != 0)
+ return __this_address;
+
+ if (hint_flag && rt_flag)
+ return __this_address;
+
+ if (cowextsize_bytes % mp->m_sb.sb_blocksize)
+ return __this_address;
+
+ if (cowextsize > MAXEXTLEN)
+ return __this_address;
+
+ if (cowextsize > mp->m_sb.sb_agblocks / 2)
+ return __this_address;
+
+ return NULL;
+}