[pve-devel] [PATCH qemu] add patch fixing Linux boot failures with megasas SCSI
Fiona Ebner
f.ebner at proxmox.com
Mon Mar 6 08:41:37 CET 2023
A regression in 7.2 and easily reproduced.
Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
---
...as-Internal-cdbs-have-16-byte-length.patch | 69 +++++++++++++++++++
debian/patches/series | 1 +
2 files changed, 70 insertions(+)
create mode 100644 debian/patches/extra/0010-scsi-megasas-Internal-cdbs-have-16-byte-length.patch
diff --git a/debian/patches/extra/0010-scsi-megasas-Internal-cdbs-have-16-byte-length.patch b/debian/patches/extra/0010-scsi-megasas-Internal-cdbs-have-16-byte-length.patch
new file mode 100644
index 0000000..20ec053
--- /dev/null
+++ b/debian/patches/extra/0010-scsi-megasas-Internal-cdbs-have-16-byte-length.patch
@@ -0,0 +1,69 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Guenter Roeck <linux at roeck-us.net>
+Date: Tue, 28 Feb 2023 09:11:29 -0800
+Subject: [PATCH] scsi: megasas: Internal cdbs have 16-byte length
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Host drivers do not necessarily set cdb_len in megasas io commands.
+With commits 6d1511cea0 ("scsi: Reject commands if the CDB length
+exceeds buf_len") and fe9d8927e2 ("scsi: Add buf_len parameter to
+scsi_req_new()"), this results in failures to boot Linux from affected
+SCSI drives because cdb_len is set to 0 by the host driver.
+Set the cdb length to its actual size to solve the problem.
+
+Signed-off-by: Guenter Roeck <linux at roeck-us.net>
+Reviewed-by: Philippe Mathieu-Daudé <philmd at linaro.org>
+(picked-up from https://lists.nongnu.org/archive/html/qemu-devel/2023-02/msg08653.html)
+Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
+---
+ hw/scsi/megasas.c | 14 ++------------
+ 1 file changed, 2 insertions(+), 12 deletions(-)
+
+diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
+index 9cbbb16121..d624866bb6 100644
+--- a/hw/scsi/megasas.c
++++ b/hw/scsi/megasas.c
+@@ -1780,7 +1780,7 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
+ uint8_t cdb[16];
+ int len;
+ struct SCSIDevice *sdev = NULL;
+- int target_id, lun_id, cdb_len;
++ int target_id, lun_id;
+
+ lba_count = le32_to_cpu(cmd->frame->io.header.data_len);
+ lba_start_lo = le32_to_cpu(cmd->frame->io.lba_lo);
+@@ -1789,7 +1789,6 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
+
+ target_id = cmd->frame->header.target_id;
+ lun_id = cmd->frame->header.lun_id;
+- cdb_len = cmd->frame->header.cdb_len;
+
+ if (target_id < MFI_MAX_LD && lun_id == 0) {
+ sdev = scsi_device_find(&s->bus, 0, target_id, lun_id);
+@@ -1804,15 +1803,6 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
+ return MFI_STAT_DEVICE_NOT_FOUND;
+ }
+
+- if (cdb_len > 16) {
+- trace_megasas_scsi_invalid_cdb_len(
+- mfi_frame_desc(frame_cmd), 1, target_id, lun_id, cdb_len);
+- megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
+- cmd->frame->header.scsi_status = CHECK_CONDITION;
+- s->event_count++;
+- return MFI_STAT_SCSI_DONE_WITH_ERROR;
+- }
+-
+ cmd->iov_size = lba_count * sdev->blocksize;
+ if (megasas_map_sgl(s, cmd, &cmd->frame->io.sgl)) {
+ megasas_write_sense(cmd, SENSE_CODE(TARGET_FAILURE));
+@@ -1823,7 +1813,7 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
+
+ megasas_encode_lba(cdb, lba_start, lba_count, is_write);
+ cmd->req = scsi_req_new(sdev, cmd->index,
+- lun_id, cdb, cdb_len, cmd);
++ lun_id, cdb, sizeof(cdb), cmd);
+ if (!cmd->req) {
+ trace_megasas_scsi_req_alloc_failed(
+ mfi_frame_desc(frame_cmd), target_id, lun_id);
diff --git a/debian/patches/series b/debian/patches/series
index 7a85c63..c1d23b5 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -7,6 +7,7 @@ extra/0006-virtio-rng-pci-fix-migration-compat-for-vectors.patch
extra/0007-block-fix-detect-zeroes-with-BDRV_REQ_REGISTERED_BUF.patch
extra/0008-memory-prevent-dma-reentracy-issues.patch
extra/0009-block-iscsi-fix-double-free-on-BUSY-or-similar-statu.patch
+extra/0010-scsi-megasas-Internal-cdbs-have-16-byte-length.patch
bitmap-mirror/0001-drive-mirror-add-support-for-sync-bitmap-mode-never.patch
bitmap-mirror/0002-drive-mirror-add-support-for-conditional-and-always-.patch
bitmap-mirror/0003-mirror-add-check-for-bitmap-mode-without-bitmap.patch
--
2.30.2
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