buf_fromcache
Check if a buffer's data was found in core.
Declaration
int buf_fromcache(buf_t bp);Parameters
- bp:
Buffer to test.
Return Value
Nonzero if we got this buffer's data without doing I/O, 0 if not.
Discussion
Will return truth after a buf_getblk that finds a valid buffer in the cache or the relevant data in core (but not in a buffer).
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_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