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Add a tunable for the nvd symlink creation.

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Some automation tries to detect if nvd or nda is in used, and the presence of
both confuses it. Provide a knob to turn off nvd alias creation
(kern.cam.nda.nvd_compat=0) for these situations. The default is the same:
create the nvd compat link.
This commit is contained in:
Warner Losh 2020-06-06 06:21:15 +00:00
parent ead4c1b485
commit 1868c484a2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361866
1 changed files with 6 additions and 2 deletions
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8
sys/cam/nvme/nvme_da.c
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@ -185,11 +185,14 @@ static int nda_send_ordered = NDA_DEFAULT_SEND_ORDERED;
static int nda_default_timeout = NDA_DEFAULT_TIMEOUT;
static int nda_max_trim_entries = NDA_MAX_TRIM_ENTRIES;
static int nda_enable_biospeedup = 1;
static int nda_nvd_compat = 1;
SYSCTL_INT(_kern_cam_nda, OID_AUTO, max_trim, CTLFLAG_RDTUN,
&nda_max_trim_entries, NDA_MAX_TRIM_ENTRIES,
"Maximum number of BIO_DELETE to send down as a DSM TRIM.");
SYSCTL_INT(_kern_cam_nda, OID_AUTO, enable_biospeedup, CTLFLAG_RDTUN,
&nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing");
&nda_enable_biospeedup, 0, "Enable BIO_SPEEDUP processing.");
SYSCTL_INT(_kern_cam_nda, OID_AUTO, nvd_compat, CTLFLAG_RDTUN,
&nda_nvd_compat, 1, "Enable creation of nvd aliases.");
/*
* All NVMe media is non-rotational, so all nvme device instances
@ -950,7 +953,8 @@ ndaregister(struct cam_periph *periph, void *arg)
/*
* Add alias for older nvd drives to ease transition.
*/
disk_add_alias(disk, "nvd");
if (nda_nvd_compat)
disk_add_alias(disk, "nvd");
/*
* Acquire a reference to the periph before we register with GEOM.