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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 09:15:35 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 09:15:35 -0700 |
commit | 929cfdd5d3bdc772aff32e5a3fb4e3894394aa75 (patch) | |
tree | f67202d079eaf1f8d65b2e1bfac70b768ae34bc4 /include/xen | |
parent | 798ce8f1cca29dcc3f4b55947f611f4ffb32ac2b (diff) | |
parent | a1c15c59feee36267c43142a41152fbf7402afb6 (diff) | |
download | kernel_samsung_smdk4412-929cfdd5d3bdc772aff32e5a3fb4e3894394aa75.zip kernel_samsung_smdk4412-929cfdd5d3bdc772aff32e5a3fb4e3894394aa75.tar.gz kernel_samsung_smdk4412-929cfdd5d3bdc772aff32e5a3fb4e3894394aa75.tar.bz2 |
Merge branch 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.40/drivers' of git://git.kernel.dk/linux-2.6-block: (110 commits)
loop: handle on-demand devices correctly
loop: limit 'max_part' module param to DISK_MAX_PARTS
drbd: fix warning
drbd: fix warning
drbd: Fix spelling
drbd: fix schedule in atomic
drbd: Take a more conservative approach when deciding max_bio_size
drbd: Fixed state transitions after async outdate-peer-handler returned
drbd: Disallow the peer_disk_state to be D_OUTDATED while connected
drbd: Fix for the connection problems on high latency links
drbd: fix potential activity log refcount imbalance in error path
drbd: Only downgrade the disk state in case of disk failures
drbd: fix disconnect/reconnect loop, if ping-timeout == ping-int
drbd: fix potential distributed deadlock
lru_cache.h: fix comments referring to ts_ instead of lc_
drbd: Fix for application IO with the on-io-error=pass-on policy
xen/p2m: Add EXPORT_SYMBOL_GPL to the M2P override functions.
xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override.
xen/blkback: don't fail empty barrier requests
xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_end()
...
Diffstat (limited to 'include/xen')
-rw-r--r-- | include/xen/interface/io/blkif.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/xen/interface/io/blkif.h b/include/xen/interface/io/blkif.h index 61e523a..3d5d6db 100644 --- a/include/xen/interface/io/blkif.h +++ b/include/xen/interface/io/blkif.h @@ -45,6 +45,19 @@ typedef uint64_t blkif_sector_t; #define BLKIF_OP_WRITE_BARRIER 2 /* + * Recognised if "feature-flush-cache" is present in backend xenbus + * info. A flush will ask the underlying storage hardware to flush its + * non-volatile caches as appropriate. The "feature-flush-cache" node + * contains a boolean indicating whether flush requests are likely to + * succeed or fail. Either way, a flush request may fail at any time + * with BLKIF_RSP_EOPNOTSUPP if it is unsupported by the underlying + * block-device hardware. The boolean simply indicates whether or not it + * is worthwhile for the frontend to attempt flushes. If a backend does + * not recognise BLKIF_OP_WRITE_FLUSH_CACHE, it should *not* create the + * "feature-flush-cache" node! + */ +#define BLKIF_OP_FLUSH_DISKCACHE 3 +/* * Maximum scatter/gather segments per request. * This is carefully chosen so that sizeof(struct blkif_ring) <= PAGE_SIZE. * NB. This could be 12 if the ring indexes weren't stored in the same page. |