diff options
| author | Chris Mason <mason@suse.com> | 2004-08-22 22:38:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-08-22 22:38:24 -0700 |
| commit | d16b94fe079f79cb9a268a2fb9576a84c562d4e3 (patch) | |
| tree | fd87566198a4295ad9d9562bce07a101f4906d8b /include/linux/buffer_head.h | |
| parent | a88cff7fcf8532decbbec25aaf0ba57e97d98227 (diff) | |
[PATCH] add BH_Eopnotsupp for testing async barrier failures
In order for filesystems to detect asynchronous ordered write failures for
buffers sent via submit_bh, they need a bit they can test for in the buffer
head. This adds BH_Eopnotsupp and the related buffer operations
end_buffer_write_sync is changed to avoid a printk for BH_Eoptnotsupp
related failures, since the FS is responsible for a retry.
sync_dirty_buffer is changed to test for BH_Eopnotsupp and return
-EOPNOTSUPP to the caller
Some of this came from Jens Axboe
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/buffer_head.h')
| -rw-r--r-- | include/linux/buffer_head.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index ef849b7a1f6d..59ed4d09a9db 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -27,6 +27,7 @@ enum bh_state_bits { BH_Boundary, /* Block is followed by a discontiguity */ BH_Write_EIO, /* I/O error on write */ BH_Ordered, /* ordered write */ + BH_Eopnotsupp, /* operation not supported (barrier) */ BH_PrivateStart,/* not a state bit, but the first bit available * for private allocation by other entities @@ -113,6 +114,7 @@ BUFFER_FNS(Delay, delay) BUFFER_FNS(Boundary, boundary) BUFFER_FNS(Write_EIO, write_io_error) BUFFER_FNS(Ordered, ordered) +BUFFER_FNS(Eopnotsupp, eopnotsupp) #define bh_offset(bh) ((unsigned long)(bh)->b_data & ~PAGE_MASK) #define touch_buffer(bh) mark_page_accessed(bh->b_page) |