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authorJens Axboe <axboe@suse.de>2006-08-10 09:01:02 +0200
committerJens Axboe <axboe@nelson.home.kernel.dk>2006-09-30 20:29:42 +0200
commit5404bc7a87b9949cf61e0174b21f80e73239ab25 (patch)
tree230c799aef2dcad8c64da55114508d28d2b30183 /include/linux/bio.h
parentda20a20f3b5c175648fa797c899dd577e4dacb51 (diff)
downloadlinux-next-5404bc7a87b9949cf61e0174b21f80e73239ab25.tar.gz
[PATCH] Allow file systems to differentiate between data and meta reads
We can use this information for making more intelligent priority decisions, and it will also be useful for blktrace. Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'include/linux/bio.h')
-rw-r--r--include/linux/bio.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 76bdaeab6f62..711c321a7011 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -148,6 +148,7 @@ struct bio {
#define BIO_RW_BARRIER 2
#define BIO_RW_FAILFAST 3
#define BIO_RW_SYNC 4
+#define BIO_RW_META 5
/*
* upper 16 bits of bi_rw define the io priority of this bio
@@ -178,6 +179,7 @@ struct bio {
#define bio_sync(bio) ((bio)->bi_rw & (1 << BIO_RW_SYNC))
#define bio_failfast(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST))
#define bio_rw_ahead(bio) ((bio)->bi_rw & (1 << BIO_RW_AHEAD))
+#define bio_rw_meta(bio) ((bio)->bi_rw & (1 << BIO_RW_META))
/*
* will die