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path: root/drivers/target/target_core_file.c
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Diffstat (limited to 'drivers/target/target_core_file.c')
-rw-r--r--drivers/target/target_core_file.c107
1 files changed, 48 insertions, 59 deletions
diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 7143d03f0e02..b2610073e8cc 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -20,8 +20,9 @@
#include <linux/vmalloc.h>
#include <linux/falloc.h>
#include <linux/uio.h>
+#include <linux/scatterlist.h>
#include <scsi/scsi_proto.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
@@ -85,6 +86,24 @@ static struct se_device *fd_alloc_device(struct se_hba *hba, const char *name)
return &fd_dev->dev;
}
+static bool fd_configure_unmap(struct se_device *dev)
+{
+ struct file *file = FD_DEV(dev)->fd_file;
+ struct inode *inode = file->f_mapping->host;
+
+ if (S_ISBLK(inode->i_mode))
+ return target_configure_unmap_from_bdev(&dev->dev_attrib,
+ I_BDEV(inode));
+
+ /* Limit UNMAP emulation to 8k Number of LBAs (NoLB) */
+ dev->dev_attrib.max_unmap_lba_count = 0x2000;
+ /* Currently hardcoded to 1 in Linux/SCSI code. */
+ dev->dev_attrib.max_unmap_block_desc_count = 1;
+ dev->dev_attrib.unmap_granularity = 1;
+ dev->dev_attrib.unmap_granularity_alignment = 0;
+ return true;
+}
+
static int fd_configure_device(struct se_device *dev)
{
struct fd_dev *fd_dev = FD_DEV(dev);
@@ -133,10 +152,10 @@ static int fd_configure_device(struct se_device *dev)
*/
inode = file->f_mapping->host;
if (S_ISBLK(inode->i_mode)) {
- struct request_queue *q = bdev_get_queue(inode->i_bdev);
+ struct block_device *bdev = I_BDEV(inode);
unsigned long long dev_size;
- fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
+ fd_dev->fd_block_size = bdev_logical_block_size(bdev);
/*
* Determine the number of bytes from i_size_read() minus
* one (1) logical sector from underlying struct block_device
@@ -148,17 +167,13 @@ static int fd_configure_device(struct se_device *dev)
" block_device blocks: %llu logical_block_size: %d\n",
dev_size, div_u64(dev_size, fd_dev->fd_block_size),
fd_dev->fd_block_size);
-
- if (target_configure_unmap_from_queue(&dev->dev_attrib, q))
- pr_debug("IFILE: BLOCK Discard support available,"
- " disabled by default\n");
/*
* Enable write same emulation for IBLOCK and use 0xFFFF as
* the smaller WRITE_SAME(10) only has a two-byte block count.
*/
dev->dev_attrib.max_write_same_len = 0xFFFF;
- if (blk_queue_nonrot(q))
+ if (bdev_nonrot(bdev))
dev->dev_attrib.is_nonrot = 1;
} else {
if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
@@ -169,16 +184,6 @@ static int fd_configure_device(struct se_device *dev)
}
fd_dev->fd_block_size = FD_BLOCKSIZE;
- /*
- * Limit UNMAP emulation to 8k Number of LBAs (NoLB)
- */
- dev->dev_attrib.max_unmap_lba_count = 0x2000;
- /*
- * Currently hardcoded to 1 in Linux/SCSI code..
- */
- dev->dev_attrib.max_unmap_block_desc_count = 1;
- dev->dev_attrib.unmap_granularity = 1;
- dev->dev_attrib.unmap_granularity_alignment = 0;
/*
* Limit WRITE_SAME w/ UNMAP=0 emulation to 8k Number of LBAs (NoLB)
@@ -188,7 +193,6 @@ static int fd_configure_device(struct se_device *dev)
}
dev->dev_attrib.hw_block_size = fd_dev->fd_block_size;
- dev->dev_attrib.max_bytes_per_io = FD_MAX_BYTES;
dev->dev_attrib.hw_max_sectors = FD_MAX_BYTES / fd_dev->fd_block_size;
dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
@@ -241,9 +245,10 @@ struct target_core_file_cmd {
unsigned long len;
struct se_cmd *cmd;
struct kiocb iocb;
+ struct bio_vec bvecs[];
};
-static void cmd_rw_aio_complete(struct kiocb *iocb, long ret, long ret2)
+static void cmd_rw_aio_complete(struct kiocb *iocb, long ret)
{
struct target_core_file_cmd *cmd;
@@ -266,31 +271,22 @@ fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
struct fd_dev *fd_dev = FD_DEV(dev);
struct file *file = fd_dev->fd_file;
struct target_core_file_cmd *aio_cmd;
- struct iov_iter iter = {};
+ struct iov_iter iter;
struct scatterlist *sg;
- struct bio_vec *bvec;
ssize_t len = 0;
int ret = 0, i;
- aio_cmd = kmalloc(sizeof(struct target_core_file_cmd), GFP_KERNEL);
+ aio_cmd = kmalloc(struct_size(aio_cmd, bvecs, sgl_nents), GFP_KERNEL);
if (!aio_cmd)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- bvec = kcalloc(sgl_nents, sizeof(struct bio_vec), GFP_KERNEL);
- if (!bvec) {
- kfree(aio_cmd);
- return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
- }
-
for_each_sg(sgl, sg, sgl_nents, i) {
- bvec[i].bv_page = sg_page(sg);
- bvec[i].bv_len = sg->length;
- bvec[i].bv_offset = sg->offset;
-
+ bvec_set_page(&aio_cmd->bvecs[i], sg_page(sg), sg->length,
+ sg->offset);
len += sg->length;
}
- iov_iter_bvec(&iter, is_write, bvec, sgl_nents, len);
+ iov_iter_bvec(&iter, is_write, aio_cmd->bvecs, sgl_nents, len);
aio_cmd->cmd = cmd;
aio_cmd->len = len;
@@ -303,14 +299,12 @@ fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
aio_cmd->iocb.ki_flags |= IOCB_DSYNC;
if (is_write)
- ret = call_write_iter(file, &aio_cmd->iocb, &iter);
+ ret = file->f_op->write_iter(&aio_cmd->iocb, &iter);
else
- ret = call_read_iter(file, &aio_cmd->iocb, &iter);
-
- kfree(bvec);
+ ret = file->f_op->read_iter(&aio_cmd->iocb, &iter);
if (ret != -EIOCBQUEUED)
- cmd_rw_aio_complete(&aio_cmd->iocb, ret, 0);
+ cmd_rw_aio_complete(&aio_cmd->iocb, ret);
return 0;
}
@@ -333,14 +327,11 @@ static int fd_do_rw(struct se_cmd *cmd, struct file *fd,
}
for_each_sg(sgl, sg, sgl_nents, i) {
- bvec[i].bv_page = sg_page(sg);
- bvec[i].bv_len = sg->length;
- bvec[i].bv_offset = sg->offset;
-
+ bvec_set_page(&bvec[i], sg_page(sg), sg->length, sg->offset);
len += sg->length;
}
- iov_iter_bvec(&iter, READ, bvec, sgl_nents, len);
+ iov_iter_bvec(&iter, is_write, bvec, sgl_nents, len);
if (is_write)
ret = vfs_iter_write(fd, &iter, &pos, 0);
else
@@ -445,16 +436,15 @@ fd_execute_write_same(struct se_cmd *cmd)
unsigned int len = 0, i;
ssize_t ret;
- if (!nolb) {
- target_complete_cmd(cmd, SAM_STAT_GOOD);
- return 0;
- }
if (cmd->prot_op) {
pr_err("WRITE_SAME: Protection information with FILEIO"
" backends not supported\n");
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
+ if (!cmd->t_data_nents)
+ return TCM_INVALID_CDB_FIELD;
+
if (cmd->t_data_nents > 1 ||
cmd->t_data_sg[0].length != cmd->se_dev->dev_attrib.block_size) {
pr_err("WRITE_SAME: Illegal SGL t_data_nents: %u length: %u"
@@ -470,14 +460,13 @@ fd_execute_write_same(struct se_cmd *cmd)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
for (i = 0; i < nolb; i++) {
- bvec[i].bv_page = sg_page(&cmd->t_data_sg[0]);
- bvec[i].bv_len = cmd->t_data_sg[0].length;
- bvec[i].bv_offset = cmd->t_data_sg[0].offset;
-
+ bvec_set_page(&bvec[i], sg_page(&cmd->t_data_sg[0]),
+ cmd->t_data_sg[0].length,
+ cmd->t_data_sg[0].offset);
len += se_dev->dev_attrib.block_size;
}
- iov_iter_bvec(&iter, READ, bvec, nolb, len);
+ iov_iter_bvec(&iter, ITER_SOURCE, bvec, nolb, len);
ret = vfs_iter_write(fd_dev->fd_file, &iter, &pos, 0);
kfree(bvec);
@@ -506,6 +495,7 @@ fd_do_prot_fill(struct se_device *se_dev, sector_t lba, sector_t nolb,
prot_length = nolb * se_dev->prot_length;
+ memset(buf, 0xff, bufsize);
for (prot = 0; prot < prot_length;) {
sector_t len = min_t(sector_t, bufsize, prot_length - prot);
ssize_t ret = kernel_write(prot_fd, buf, len, &pos);
@@ -531,7 +521,6 @@ fd_do_prot_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
pr_err("Unable to allocate FILEIO prot buf\n");
return -ENOMEM;
}
- memset(buf, 0xff, PAGE_SIZE);
rc = fd_do_prot_fill(cmd->se_dev, lba, nolb, buf, PAGE_SIZE);
@@ -559,13 +548,13 @@ fd_execute_unmap(struct se_cmd *cmd, sector_t lba, sector_t nolb)
if (S_ISBLK(inode->i_mode)) {
/* The backend is block device, use discard */
- struct block_device *bdev = inode->i_bdev;
+ struct block_device *bdev = I_BDEV(inode);
struct se_device *dev = cmd->se_dev;
ret = blkdev_issue_discard(bdev,
target_to_linux_sector(dev, lba),
target_to_linux_sector(dev, nolb),
- GFP_KERNEL, 0);
+ GFP_KERNEL);
if (ret < 0) {
pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n",
ret);
@@ -890,7 +879,6 @@ static int fd_format_prot(struct se_device *dev)
(unsigned long long)(dev->transport->get_blocks(dev) + 1) *
dev->prot_length);
- memset(buf, 0xff, unit_size);
ret = fd_do_prot_fill(dev, 0, dev->transport->get_blocks(dev) + 1,
buf, unit_size);
vfree(buf);
@@ -908,7 +896,7 @@ static void fd_free_prot(struct se_device *dev)
fd_dev->fd_prot_file = NULL;
}
-static struct sbc_ops fd_sbc_ops = {
+static struct exec_cmd_ops fd_exec_cmd_ops = {
.execute_rw = fd_execute_rw,
.execute_sync_cache = fd_execute_sync_cache,
.execute_write_same = fd_execute_write_same,
@@ -918,7 +906,7 @@ static struct sbc_ops fd_sbc_ops = {
static sense_reason_t
fd_parse_cdb(struct se_cmd *cmd)
{
- return sbc_parse_cdb(cmd, &fd_sbc_ops);
+ return sbc_parse_cdb(cmd, &fd_exec_cmd_ops);
}
static const struct target_backend_ops fileio_ops = {
@@ -932,6 +920,7 @@ static const struct target_backend_ops fileio_ops = {
.configure_device = fd_configure_device,
.destroy_device = fd_destroy_device,
.free_device = fd_free_device,
+ .configure_unmap = fd_configure_unmap,
.parse_cdb = fd_parse_cdb,
.set_configfs_dev_params = fd_set_configfs_dev_params,
.show_configfs_dev_params = fd_show_configfs_dev_params,
generated by cgit (git 2.34.1) at 2025-12-25 18:05:03 +0000