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Diffstat (limited to 'drivers/mmc/card')
-rw-r--r--drivers/mmc/card/block.c210
1 files changed, 146 insertions, 64 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index c742cfd76..d84861684 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -65,8 +65,7 @@ MODULE_ALIAS("mmc:block");
#define MMC_SANITIZE_REQ_TIMEOUT 240000
#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
-#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
- (req->cmd_flags & REQ_META)) && \
+#define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
(rq_data_dir(req) == WRITE))
#define PACKED_CMD_VER 0x01
#define PACKED_CMD_WR 0x02
@@ -387,6 +386,24 @@ out:
return ERR_PTR(err);
}
+static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
+ struct mmc_blk_ioc_data *idata)
+{
+ struct mmc_ioc_cmd *ic = &idata->ic;
+
+ if (copy_to_user(&(ic_ptr->response), ic->response,
+ sizeof(ic->response)))
+ return -EFAULT;
+
+ if (!idata->ic.write_flag) {
+ if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
+ idata->buf, idata->buf_bytes))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
u32 retries_max)
{
@@ -447,12 +464,9 @@ out:
return err;
}
-static int mmc_blk_ioctl_cmd(struct block_device *bdev,
- struct mmc_ioc_cmd __user *ic_ptr)
+static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
+ struct mmc_blk_ioc_data *idata)
{
- struct mmc_blk_ioc_data *idata;
- struct mmc_blk_data *md;
- struct mmc_card *card;
struct mmc_command cmd = {0};
struct mmc_data data = {0};
struct mmc_request mrq = {NULL};
@@ -461,33 +475,12 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
int is_rpmb = false;
u32 status = 0;
- /*
- * The caller must have CAP_SYS_RAWIO, and must be calling this on the
- * whole block device, not on a partition. This prevents overspray
- * between sibling partitions.
- */
- if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
- return -EPERM;
-
- idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
- if (IS_ERR(idata))
- return PTR_ERR(idata);
-
- md = mmc_blk_get(bdev->bd_disk);
- if (!md) {
- err = -EINVAL;
- goto cmd_err;
- }
+ if (!card || !md || !idata)
+ return -EINVAL;
if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
is_rpmb = true;
- card = md->queue.card;
- if (IS_ERR(card)) {
- err = PTR_ERR(card);
- goto cmd_done;
- }
-
cmd.opcode = idata->ic.opcode;
cmd.arg = idata->ic.arg;
cmd.flags = idata->ic.flags;
@@ -530,23 +523,21 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
mrq.cmd = &cmd;
- mmc_get_card(card);
-
err = mmc_blk_part_switch(card, md);
if (err)
- goto cmd_rel_host;
+ return err;
if (idata->ic.is_acmd) {
err = mmc_app_cmd(card->host, card);
if (err)
- goto cmd_rel_host;
+ return err;
}
if (is_rpmb) {
err = mmc_set_blockcount(card, data.blocks,
idata->ic.write_flag & (1 << 31));
if (err)
- goto cmd_rel_host;
+ return err;
}
if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
@@ -557,7 +548,7 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
pr_err("%s: ioctl_do_sanitize() failed. err = %d",
__func__, err);
- goto cmd_rel_host;
+ return err;
}
mmc_wait_for_req(card->host, &mrq);
@@ -565,14 +556,12 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
if (cmd.error) {
dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
__func__, cmd.error);
- err = cmd.error;
- goto cmd_rel_host;
+ return cmd.error;
}
if (data.error) {
dev_err(mmc_dev(card->host), "%s: data error %d\n",
__func__, data.error);
- err = data.error;
- goto cmd_rel_host;
+ return data.error;
}
/*
@@ -582,18 +571,7 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
if (idata->ic.postsleep_min_us)
usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
- if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
- err = -EFAULT;
- goto cmd_rel_host;
- }
-
- if (!idata->ic.write_flag) {
- if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
- idata->buf, idata->buf_bytes)) {
- err = -EFAULT;
- goto cmd_rel_host;
- }
- }
+ memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
if (is_rpmb) {
/*
@@ -607,24 +585,132 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
__func__, status, err);
}
-cmd_rel_host:
+ return err;
+}
+
+static int mmc_blk_ioctl_cmd(struct block_device *bdev,
+ struct mmc_ioc_cmd __user *ic_ptr)
+{
+ struct mmc_blk_ioc_data *idata;
+ struct mmc_blk_data *md;
+ struct mmc_card *card;
+ int err = 0, ioc_err = 0;
+
+ idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
+ if (IS_ERR(idata))
+ return PTR_ERR(idata);
+
+ md = mmc_blk_get(bdev->bd_disk);
+ if (!md) {
+ err = -EINVAL;
+ goto cmd_err;
+ }
+
+ card = md->queue.card;
+ if (IS_ERR(card)) {
+ err = PTR_ERR(card);
+ goto cmd_done;
+ }
+
+ mmc_get_card(card);
+
+ ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
+
mmc_put_card(card);
+ err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
+
cmd_done:
mmc_blk_put(md);
cmd_err:
kfree(idata->buf);
kfree(idata);
- return err;
+ return ioc_err ? ioc_err : err;
+}
+
+static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
+ struct mmc_ioc_multi_cmd __user *user)
+{
+ struct mmc_blk_ioc_data **idata = NULL;
+ struct mmc_ioc_cmd __user *cmds = user->cmds;
+ struct mmc_card *card;
+ struct mmc_blk_data *md;
+ int i, err = 0, ioc_err = 0;
+ __u64 num_of_cmds;
+
+ if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
+ sizeof(num_of_cmds)))
+ return -EFAULT;
+
+ if (num_of_cmds > MMC_IOC_MAX_CMDS)
+ return -EINVAL;
+
+ idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
+ if (!idata)
+ return -ENOMEM;
+
+ for (i = 0; i < num_of_cmds; i++) {
+ idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
+ if (IS_ERR(idata[i])) {
+ err = PTR_ERR(idata[i]);
+ num_of_cmds = i;
+ goto cmd_err;
+ }
+ }
+
+ md = mmc_blk_get(bdev->bd_disk);
+ if (!md)
+ goto cmd_err;
+
+ card = md->queue.card;
+ if (IS_ERR(card)) {
+ err = PTR_ERR(card);
+ goto cmd_done;
+ }
+
+ mmc_get_card(card);
+
+ for (i = 0; i < num_of_cmds && !ioc_err; i++)
+ ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
+
+ mmc_put_card(card);
+
+ /* copy to user if data and response */
+ for (i = 0; i < num_of_cmds && !err; i++)
+ err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
+
+cmd_done:
+ mmc_blk_put(md);
+cmd_err:
+ for (i = 0; i < num_of_cmds; i++) {
+ kfree(idata[i]->buf);
+ kfree(idata[i]);
+ }
+ kfree(idata);
+ return ioc_err ? ioc_err : err;
}
static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
- int ret = -EINVAL;
- if (cmd == MMC_IOC_CMD)
- ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
- return ret;
+ /*
+ * The caller must have CAP_SYS_RAWIO, and must be calling this on the
+ * whole block device, not on a partition. This prevents overspray
+ * between sibling partitions.
+ */
+ if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
+ return -EPERM;
+
+ switch (cmd) {
+ case MMC_IOC_CMD:
+ return mmc_blk_ioctl_cmd(bdev,
+ (struct mmc_ioc_cmd __user *)arg);
+ case MMC_IOC_MULTI_CMD:
+ return mmc_blk_ioctl_multi_cmd(bdev,
+ (struct mmc_ioc_multi_cmd __user *)arg);
+ default:
+ return -EINVAL;
+ }
}
#ifdef CONFIG_COMPAT
@@ -1380,13 +1466,9 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
/*
* Reliable writes are used to implement Forced Unit Access and
- * REQ_META accesses, and are supported only on MMCs.
- *
- * XXX: this really needs a good explanation of why REQ_META
- * is treated special.
+ * are supported only on MMCs.
*/
- bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
- (req->cmd_flags & REQ_META)) &&
+ bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
(rq_data_dir(req) == WRITE) &&
(md->flags & MMC_BLK_REL_WR);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-19 08:42:07 +0000