From 877f962c5edacfef60ab21cfed6d8d54ce25b8a6 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sat, 20 Apr 2013 19:58:37 -0400 Subject: buffer: add BH_Prio and BH_Meta flags Add buffer_head flags so that buffer cache writebacks can be marked with the the appropriate request flags, so that metadata blocks can be marked appropriately in blktrace. Signed-off-by: "Theodore Ts'o" --- include/linux/buffer_head.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/buffer_head.h') diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 5afc4f94d110..33c0f8103fe4 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -34,6 +34,8 @@ enum bh_state_bits { BH_Write_EIO, /* I/O error on write */ BH_Unwritten, /* Buffer is allocated on disk but not written */ BH_Quiet, /* Buffer Error Prinks to be quiet */ + BH_Meta, /* Buffer contains metadata */ + BH_Prio, /* Buffer should be submitted with REQ_PRIO */ BH_PrivateStart,/* not a state bit, but the first bit available * for private allocation by other entities @@ -124,6 +126,8 @@ BUFFER_FNS(Delay, delay) BUFFER_FNS(Boundary, boundary) BUFFER_FNS(Write_EIO, write_io_error) BUFFER_FNS(Unwritten, unwritten) +BUFFER_FNS(Meta, meta) +BUFFER_FNS(Prio, prio) #define bh_offset(bh) ((unsigned long)(bh)->b_data & ~PAGE_MASK) -- cgit v1.2.3