summaryrefslogtreecommitdiffstats
path: root/drivers/target/target_core_file.h
diff options
context:
space:
mode:
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 /drivers/target/target_core_file.h
parent2853c2b6671509591be09213954d7249ca6ff224 (diff)
downloadlinux-95cadace8f3959282e76ebf8b382bd0930807d2c.tar.bz2
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 'drivers/target/target_core_file.h')
-rw-r--r--drivers/target/target_core_file.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/target/target_core_file.h b/drivers/target/target_core_file.h
index 37ffc5bd2399..d7772c167685 100644
--- a/drivers/target/target_core_file.h
+++ b/drivers/target/target_core_file.h
@@ -7,7 +7,10 @@
#define FD_DEVICE_QUEUE_DEPTH 32
#define FD_MAX_DEVICE_QUEUE_DEPTH 128
#define FD_BLOCKSIZE 512
-#define FD_MAX_SECTORS 2048
+/*
+ * Limited by the number of iovecs (2048) per vfs_[writev,readv] call
+ */
+#define FD_MAX_BYTES 8388608
#define RRF_EMULATE_CDB 0x01
#define RRF_GOT_LBA 0x02