buf_uploffset
Get the offset into a UPL at which this buffer begins.
Declaration
uint32_t buf_uploffset(buf_t bp);Parameters
- bp:
Buffer whose uploffset to grab.
Return Value
Buffer's uploffset--does not check whether that value makes sense for this buffer.
Discussion
This function should only be called on iobufs, i.e. buffers allocated with buf_alloc().
See Also
Buffers
buf_allocbuf_attrbuf_bawritebuf_bdwritebuf_biodonebuf_biowaitbuf_blknobuf_breadbuf_breadnbuf_brelsebuf_bwritebuf_callbackbuf_clearbuf_clear_redundancy_flagsbuf_clearflagsbuf_clonebuf_countbuf_create_shadowbuf_dataptrbuf_devicebuf_dirtyendbuf_dirtyoffbuf_drvdatabuf_errorbuf_flagsbuf_flushdirtyblksbuf_freebuf_fromcachebuf_fsprivatebuf_fuabuf_getblkbuf_geteblkbuf_invalblknobuf_invalidateblksbuf_iteratebuf_lblknobuf_mapbuf_markagedbuf_markcleanbuf_markdelayedbuf_markeintrbuf_markfuabuf_markinvalidbuf_markstaticbuf_meta_breadbuf_meta_breadnbuf_procbuf_rcredbuf_redundancy_flagsbuf_resetbuf_residbuf_set_redundancy_flagsbuf_setblknobuf_setcallbackbuf_setcountbuf_setdataptrbuf_setdevicebuf_setdirtyendbuf_setdirtyoffbuf_setdrvdatabuf_seterrorbuf_setflagsbuf_setfsprivatebuf_setlblknobuf_setresidbuf_setsizebuf_setuplbuf_setvnodebuf_shadowbuf_sizebuf_staticbuf_strategybuf_unmapbuf_uplbuf_validbuf_vnodebuf_wcredbufattr_ioscheduledbufattr_markioscheduled