diff options
Diffstat (limited to 'libpager')
| -rw-r--r-- | libpager/priv.h | 26 |
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; |