renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-16 17:23:55 +08:00
Code

xen: branch for v6.0-rc4

Browse Source 
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYxNpQQAKCRCAXGG7T9hj
 vgO9AQChV9kknjgoL9qWJe25nNHyQ4zNfgtUNLefamYOAr93HgEAiFv7SIwMshFb
 jl4oceI76z2u6APkZlySR2JcJa+B+go=
 =BtBW
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-6.0-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - a minor fix for the Xen grant driver

 - a small series fixing a recently introduced problem in the Xen
   blkfront/blkback drivers with negotiation of feature usage

* tag 'for-linus-6.0-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/grants: prevent integer overflow in gnttab_dma_alloc_pages()
  xen-blkfront: Cache feature_persistent value before advertisement
  xen-blkfront: Advertise feature-persistent as user requested
  xen-blkback: Advertise feature-persistent as user requested
This commit is contained in:
Linus Torvalds 2022-09-03 13:23:11 -07:00
commit 65eea2c060
4 changed files with 22 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/block/xen-blkback/common.h
View File

@ -226,6 +226,9 @@ struct xen_vbd {
sector_t size;
unsigned int flush_support:1;
unsigned int discard_secure:1;
/* Connect-time cached feature_persistent parameter value */
unsigned int feature_gnt_persistent_parm:1;
/* Persistent grants feature negotiation result */
unsigned int feature_gnt_persistent:1;
unsigned int overflow_max_grants:1;
};

6
drivers/block/xen-blkback/xenbus.c
View File

@ -907,7 +907,7 @@ again:
xen_blkbk_barrier(xbt, be, be->blkif->vbd.flush_support);
err = xenbus_printf(xbt, dev->nodename, "feature-persistent", "%u",
be->blkif->vbd.feature_gnt_persistent);
be->blkif->vbd.feature_gnt_persistent_parm);
if (err) {
xenbus_dev_fatal(dev, err, "writing %s/feature-persistent",
dev->nodename);
@ -1085,7 +1085,9 @@ static int connect_ring(struct backend_info *be)
return -ENOSYS;
}
blkif->vbd.feature_gnt_persistent = feature_persistent &&
blkif->vbd.feature_gnt_persistent_parm = feature_persistent;
blkif->vbd.feature_gnt_persistent =
blkif->vbd.feature_gnt_persistent_parm &&
xenbus_read_unsigned(dev->otherend, "feature-persistent", 0);
blkif->vbd.overflow_max_grants = 0;

20
drivers/block/xen-blkfront.c
View File

@ -213,6 +213,9 @@ struct blkfront_info
unsigned int feature_fua:1;
unsigned int feature_discard:1;
unsigned int feature_secdiscard:1;
/* Connect-time cached feature_persistent parameter */
unsigned int feature_persistent_parm:1;
/* Persistent grants feature negotiation result */
unsigned int feature_persistent:1;
unsigned int bounce:1;
unsigned int discard_granularity;
@ -1756,6 +1759,12 @@ abort_transaction:
return err;
}
/* Enable the persistent grants feature. */
static bool feature_persistent = true;
module_param(feature_persistent, bool, 0644);
MODULE_PARM_DESC(feature_persistent,
"Enables the persistent grants feature");
/* Common code used when first setting up, and when resuming. */
static int talk_to_blkback(struct xenbus_device *dev,
struct blkfront_info *info)
@ -1847,8 +1856,9 @@ again:
message = "writing protocol";
goto abort_transaction;
}
info->feature_persistent_parm = feature_persistent;
err = xenbus_printf(xbt, dev->nodename, "feature-persistent", "%u",
info->feature_persistent);
info->feature_persistent_parm);
if (err)
dev_warn(&dev->dev,
"writing persistent grants feature to xenbus");
@ -1916,12 +1926,6 @@ static int negotiate_mq(struct blkfront_info *info)
return 0;
}
/* Enable the persistent grants feature. */
static bool feature_persistent = true;
module_param(feature_persistent, bool, 0644);
MODULE_PARM_DESC(feature_persistent,
"Enables the persistent grants feature");
/*
* Entry point to this code when a new device is created. Allocate the basic
* structures and the ring buffer for communication with the backend, and
@ -2281,7 +2285,7 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
if (xenbus_read_unsigned(info->xbdev->otherend, "feature-discard", 0))
blkfront_setup_discard(info);
if (feature_persistent)
if (info->feature_persistent_parm)
info->feature_persistent =
!!xenbus_read_unsigned(info->xbdev->otherend,
"feature-persistent", 0);

3
drivers/xen/grant-table.c
View File

@ -1047,6 +1047,9 @@ int gnttab_dma_alloc_pages(struct gnttab_dma_alloc_args *args)
size_t size;
int i, ret;
if (args->nr_pages < 0 || args->nr_pages > (INT_MAX >> PAGE_SHIFT))
return -ENOMEM;
size = args->nr_pages << PAGE_SHIFT;
if (args->coherent)
args->vaddr = dma_alloc_coherent(args->dev, size,