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authorNicholas Bellinger <nab@linux-iscsi.org>2013-12-12 12:24:11 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2013-12-19 00:18:54 -0800
commit95cadace8f3959282e76ebf8b382bd0930807d2c (patch)
tree2b8773e84f7dc600eba50665d18377f2f130b1e8 /include/target
parent2853c2b6671509591be09213954d7249ca6ff224 (diff)
downloadop-kernel-dev-95cadace8f3959282e76ebf8b382bd0930807d2c.zip
op-kernel-dev-95cadace8f3959282e76ebf8b382bd0930807d2c.tar.gz
target/file: Update hw_max_sectors based on current block_size
This patch allows FILEIO to update hw_max_sectors based on the current max_bytes_per_io. This is required because vfs_[writev,readv]() can accept a maximum of 2048 iovecs per call, so the enforced hw_max_sectors really needs to be calculated based on block_size. This addresses a >= v3.5 bug where block_size=512 was rejecting > 1M sized I/O requests, because FD_MAX_SECTORS was hardcoded to 2048 for the block_size=4096 case. (v2: Use max_bytes_per_io instead of ->update_hw_max_sectors) Reported-by: Henrik Goldman <hg@x-formation.com> Cc: <stable@vger.kernel.org> #3.5+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_base.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 9f1dda6..321301c 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -620,6 +620,7 @@ struct se_dev_attrib {
u32 unmap_granularity;
u32 unmap_granularity_alignment;
u32 max_write_same_len;
+ u32 max_bytes_per_io;
struct se_device *da_dev;
struct config_group da_group;
};
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