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authorSagi Grimberg <sagig@mellanox.com>2014-02-19 17:50:16 +0200
committerNicholas Bellinger <nab@linux-iscsi.org>2014-04-07 01:48:39 -0700
commit80dcd0c10482719bd9250b7d11bd5c360a02403a (patch)
tree3ae03f1b8a5a0c71e0fc2365a52aa8a5bac10537 /drivers/target
parent19f9361af7dfa0bb1f98c7619544ed71d2dded39 (diff)
downloadlinux-80dcd0c10482719bd9250b7d11bd5c360a02403a.tar.bz2
Target/file: place escape values for protection information format
No need to actually compute protection information when formatting Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_file.c40
1 files changed, 1 insertions, 39 deletions
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index cf991a91a8a9..7d6cddaec525 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -854,25 +854,6 @@ static int fd_init_prot(struct se_device *dev)
return 0;
}
-static void fd_init_format_buf(struct se_device *dev, unsigned char *buf,
- u32 unit_size, u32 *ref_tag, u16 app_tag,
- bool inc_reftag)
-{
- unsigned char *p = buf;
- int i;
-
- for (i = 0; i < unit_size; i += dev->prot_length) {
- *((u16 *)&p[0]) = 0xffff;
- *((__be16 *)&p[2]) = cpu_to_be16(app_tag);
- *((__be32 *)&p[4]) = cpu_to_be32(*ref_tag);
-
- if (inc_reftag)
- (*ref_tag)++;
-
- p += dev->prot_length;
- }
-}
-
static int fd_format_prot(struct se_device *dev)
{
struct fd_dev *fd_dev = FD_DEV(dev);
@@ -880,10 +861,8 @@ static int fd_format_prot(struct se_device *dev)
sector_t prot_length, prot;
unsigned char *buf;
loff_t pos = 0;
- u32 ref_tag = 0;
int unit_size = FDBD_FORMAT_UNIT_SIZE * dev->dev_attrib.block_size;
int rc, ret = 0, size, len;
- bool inc_reftag = false;
if (!dev->dev_attrib.pi_prot_type) {
pr_err("Unable to format_prot while pi_prot_type == 0\n");
@@ -894,37 +873,20 @@ static int fd_format_prot(struct se_device *dev)
return -ENODEV;
}
- switch (dev->dev_attrib.pi_prot_type) {
- case TARGET_DIF_TYPE3_PROT:
- ref_tag = 0xffffffff;
- break;
- case TARGET_DIF_TYPE2_PROT:
- case TARGET_DIF_TYPE1_PROT:
- inc_reftag = true;
- break;
- default:
- break;
- }
-
buf = vzalloc(unit_size);
if (!buf) {
pr_err("Unable to allocate FILEIO prot buf\n");
return -ENOMEM;
}
-
prot_length = (dev->transport->get_blocks(dev) + 1) * dev->prot_length;
size = prot_length;
pr_debug("Using FILEIO prot_length: %llu\n",
(unsigned long long)prot_length);
+ memset(buf, 0xff, unit_size);
for (prot = 0; prot < prot_length; prot += unit_size) {
-
- fd_init_format_buf(dev, buf, unit_size, &ref_tag, 0xffff,
- inc_reftag);
-
len = min(unit_size, size);
-
rc = kernel_write(prot_fd, buf, len, pos);
if (rc != len) {
pr_err("vfs_write to prot file failed: %d\n", rc);