buf_bwrite
Write a buffer's data to backing store.
Declaration
errno_t buf_bwrite(buf_t bp);Parameters
- bp:
The buffer to write to disk.
Return Value
0 for success; errors from buf_biowait().
Discussion
Once the data in a buffer has been modified, buf_bwrite() starts sending it to disk by calling VNOP_STRATEGY. Unless B_ASYNC has been set on the buffer (by buf_setflags() or otherwise), data will have been written to disk when buf_bwrite() returns. See Bach (p 56).
See Also
Buffers
buf_allocbuf_attrbuf_bawritebuf_bdwritebuf_biodonebuf_biowaitbuf_blknobuf_breadbuf_breadnbuf_brelsebuf_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_uploffsetbuf_validbuf_vnodebuf_wcredbufattr_ioscheduledbufattr_markioscheduled