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cryptsetup: add support for workqueue options

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This commit adds support for disabling the read and write
workqueues with the new crypttab options no-read-workqueue
and no-write-workqueue. These correspond to the cryptsetup
options --perf-no_read_workqueue and --perf-no_write_workqueue
respectively.
This commit is contained in:
Jonathan G. Underwood
2020-12-23 11:07:48 +00:00
committed by Luca Boccassi
parent 68709a636c
commit 227acf0009
3 changed files with 39 additions and 0 deletions
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src/cryptsetup/cryptsetup.c
+12
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@@ -60,6 +60,8 @@ static bool arg_verify = false;
static bool arg_discards = false;
static bool arg_same_cpu_crypt = false;
static bool arg_submit_from_crypt_cpus = false;
static bool arg_no_read_workqueue = false;
static bool arg_no_write_workqueue = false;
static bool arg_tcrypt_hidden = false;
static bool arg_tcrypt_system = false;
static bool arg_tcrypt_veracrypt = false;
@@ -236,6 +238,10 @@ static int parse_one_option(const char *option) {
arg_same_cpu_crypt = true;
else if (streq(option, "submit-from-crypt-cpus"))
arg_submit_from_crypt_cpus = true;
else if (streq(option, "no-read-workqueue"))
arg_no_read_workqueue = true;
else if (streq(option, "no-write-workqueue"))
arg_no_write_workqueue = true;
else if (streq(option, "luks"))
arg_type = ANY_LUKS;
/* since cryptsetup 2.3.0 (Feb 2020) */
@@ -1352,6 +1358,12 @@ static uint32_t determine_flags(void) {
if (arg_submit_from_crypt_cpus)
flags |= CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS;
if (arg_no_read_workqueue)
flags |= CRYPT_ACTIVATE_NO_READ_WORKQUEUE;
if (arg_no_write_workqueue)
flags |= CRYPT_ACTIVATE_NO_WRITE_WORKQUEUE;
#ifdef CRYPT_ACTIVATE_SERIALIZE_MEMORY_HARD_PBKDF
/* Try to decrease the risk of OOM event if memory hard key derivation function is in use */
/* https://gitlab.com/cryptsetup/cryptsetup/issues/446/ */