*
* This file contains the Storage Engine <-> FILEIO transport specific functions
*
- * Copyright (c) 2005 PyX Technologies, Inc.
- * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
- * Copyright (c) 2007-2010 Rising Tide Systems
- * Copyright (c) 2008-2010 Linux-iSCSI.org
+ * (c) Copyright 2005-2012 RisingTide Systems LLC.
*
* Nicholas A. Bellinger <nab@kernel.org>
*
kfree(fd_dev);
}
-static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl,
- u32 sgl_nents)
+static int fd_do_rw(struct se_cmd *cmd, struct scatterlist *sgl,
+ u32 sgl_nents, int is_write)
{
struct se_device *se_dev = cmd->se_dev;
struct fd_dev *dev = FD_DEV(se_dev);
for_each_sg(sgl, sg, sgl_nents, i) {
iov[i].iov_len = sg->length;
- iov[i].iov_base = sg_virt(sg);
+ iov[i].iov_base = kmap(sg_page(sg)) + sg->offset;
}
old_fs = get_fs();
set_fs(get_ds());
- ret = vfs_readv(fd, &iov[0], sgl_nents, &pos);
+
+ if (is_write)
+ ret = vfs_writev(fd, &iov[0], sgl_nents, &pos);
+ else
+ ret = vfs_readv(fd, &iov[0], sgl_nents, &pos);
+
set_fs(old_fs);
+ for_each_sg(sgl, sg, sgl_nents, i)
+ kunmap(sg_page(sg));
+
kfree(iov);
- /*
- * Return zeros and GOOD status even if the READ did not return
- * the expected virt_size for struct file w/o a backing struct
- * block_device.
- */
- if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
+
+ if (is_write) {
if (ret < 0 || ret != cmd->data_length) {
- pr_err("vfs_readv() returned %d,"
- " expecting %d for S_ISBLK\n", ret,
- (int)cmd->data_length);
+ pr_err("%s() write returned %d\n", __func__, ret);
return (ret < 0 ? ret : -EINVAL);
}
} else {
- if (ret < 0) {
- pr_err("vfs_readv() returned %d for non"
- " S_ISBLK\n", ret);
- return ret;
+ /*
+ * Return zeros and GOOD status even if the READ did not return
+ * the expected virt_size for struct file w/o a backing struct
+ * block_device.
+ */
+ if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
+ if (ret < 0 || ret != cmd->data_length) {
+ pr_err("%s() returned %d, expecting %u for "
+ "S_ISBLK\n", __func__, ret,
+ cmd->data_length);
+ return (ret < 0 ? ret : -EINVAL);
+ }
+ } else {
+ if (ret < 0) {
+ pr_err("%s() returned %d for non S_ISBLK\n",
+ __func__, ret);
+ return ret;
+ }
}
}
-
- return 1;
-}
-
-static int fd_do_writev(struct se_cmd *cmd, struct scatterlist *sgl,
- u32 sgl_nents)
-{
- struct se_device *se_dev = cmd->se_dev;
- struct fd_dev *dev = FD_DEV(se_dev);
- struct file *fd = dev->fd_file;
- struct scatterlist *sg;
- struct iovec *iov;
- mm_segment_t old_fs;
- loff_t pos = (cmd->t_task_lba * se_dev->dev_attrib.block_size);
- int ret, i = 0;
-
- iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL);
- if (!iov) {
- pr_err("Unable to allocate fd_do_writev iov[]\n");
- return -ENOMEM;
- }
-
- for_each_sg(sgl, sg, sgl_nents, i) {
- iov[i].iov_len = sg->length;
- iov[i].iov_base = sg_virt(sg);
- }
-
- old_fs = get_fs();
- set_fs(get_ds());
- ret = vfs_writev(fd, &iov[0], sgl_nents, &pos);
- set_fs(old_fs);
-
- kfree(iov);
-
- if (ret < 0 || ret != cmd->data_length) {
- pr_err("vfs_writev() returned %d\n", ret);
- return (ret < 0 ? ret : -EINVAL);
- }
-
return 1;
}
-static int fd_execute_sync_cache(struct se_cmd *cmd)
+static sense_reason_t
+fd_execute_sync_cache(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct fd_dev *fd_dev = FD_DEV(dev);
if (immed)
return 0;
- if (ret) {
- cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+ if (ret)
target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
- } else {
+ else
target_complete_cmd(cmd, SAM_STAT_GOOD);
- }
return 0;
}
-static int fd_execute_rw(struct se_cmd *cmd)
+static sense_reason_t
+fd_execute_rw(struct se_cmd *cmd)
{
struct scatterlist *sgl = cmd->t_data_sg;
u32 sgl_nents = cmd->t_data_nents;
* physical memory addresses to struct iovec virtual memory.
*/
if (data_direction == DMA_FROM_DEVICE) {
- ret = fd_do_readv(cmd, sgl, sgl_nents);
+ ret = fd_do_rw(cmd, sgl, sgl_nents, 0);
} else {
- ret = fd_do_writev(cmd, sgl, sgl_nents);
+ ret = fd_do_rw(cmd, sgl, sgl_nents, 1);
/*
* Perform implict vfs_fsync_range() for fd_do_writev() ops
* for SCSI WRITEs with Forced Unit Access (FUA) set.
}
}
- if (ret < 0) {
- cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- return ret;
- }
+ if (ret < 0)
+ return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+
if (ret)
target_complete_cmd(cmd, SAM_STAT_GOOD);
return 0;
.execute_sync_cache = fd_execute_sync_cache,
};
-static int fd_parse_cdb(struct se_cmd *cmd)
+static sense_reason_t
+fd_parse_cdb(struct se_cmd *cmd)
{
return sbc_parse_cdb(cmd, &fd_sbc_ops);
}
projects / platform / kernel / linux-starfive.git / blobdiff