summaryrefslogtreecommitdiff
path: root/libpager
diff options
context:
space:
mode:
Diffstat (limited to 'libpager')
-rw-r--r--libpager/priv.h26
1 files changed, 23 insertions, 3 deletions
diff --git a/libpager/priv.h b/libpager/priv.h
index 490df02f..37400e1d 100644
--- a/libpager/priv.h
+++ b/libpager/priv.h
@@ -68,14 +68,34 @@ enum page_errors
PAGE_EDQUOT,
};
+/* Pagemap format */
+/* These are binary state bits */
+#define PM_PAGINGOUT 0x40 /* being written to disk */
+#define PM_PAGEINWAIT 0x20 /* provide data back when write done */
+#define PM_INVALID 0x10 /* data on disk is irrevocably wrong */
+
+/* These take values of enum page_errors */
+
+/* Doesn't belong here; this is the error that should have been passed
+ through m_o_data_error to the user but isn't; this lets internal use
+ of the pager know what the error is. */
+#define PM_ERROR(byte) (((byte) & 0xc) >> 2)
+#define SET_PM_ERROR(byte,err) (((byte) & ~0xc) | ((err) << 2))
+
+/* Issue this error on next data_request, but only if it asks for
+ write access. */
+#define PM_NEXTERROR(byte) ((byte) & 0x2)
+#define SET_PM_NEXTERROR(byte,err) (((byte) & ~0x2) | (err))
+
void _pager_wait_for_seqno (struct pager *, int);
void _pager_release_seqno (struct pager *);
void _pager_block_termination (struct pager *);
void _pager_allow_termination (struct pager *);
void _pager_pagemap_resize (struct pager *, vm_address_t);
-void _pager_mark_object_error (struct pager *, vm_address_t, vm_size_t, int);
+void _pager_mark_next_request_error (struct pager *, vm_address_t,
+ vm_size_t, error_t);
+void _pager_mark_object_error (struct pager *, vm_address_t,
+ vm_size_t, error_t);
-struct pager *_pager_all_pagers;
-spin_lock_t pagerlistlock;