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cryptsetup: add same-cpu-crypt and submit-from-crypt-cpus options

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Closes #11946.
This commit is contained in:
Yu Watanabe 2019-03-11 14:04:06 +09:00 committed by Lennart Poettering
parent 05044ebff9
commit 2c65512ee7
3 changed files with 40 additions and 0 deletions
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20
man/crypttab.xml
View File

@ -224,6 +224,26 @@
mode.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>same-cpu-crypt</option></term>
<listitem><para>Perform encryption using the same cpu that IO was submitted on. The default is to use
an unbound workqueue so that encryption work is automatically balanced between available CPUs.</para>
<para>This requires kernel 4.0 or newer.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>submit-from-crypt-cpus</option></term>
<listitem><para>Disable offloading writes to a separate thread after encryption. There are some
situations where offloading write bios from the encryption threads to a single thread degrades
performance significantly. The default is to offload write bios to the same thread because it benefits
CFQ to have writes submitted using the same context.</para>
<para>This requires kernel 4.0 or newer.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>skip=</option></term>

12
src/cryptsetup/cryptsetup.c
View File

@ -44,6 +44,8 @@ static unsigned arg_tries = 3;
static bool arg_readonly = false;
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_tcrypt_hidden = false;
static bool arg_tcrypt_system = false;
#ifdef CRYPT_TCRYPT_VERA_MODES
@ -199,6 +201,10 @@ static int parse_one_option(const char *option) {
arg_verify = true;
else if (STR_IN_SET(option, "allow-discards", "discard"))
arg_discards = true;
else if (streq(option, "same-cpu-crypt"))
arg_same_cpu_crypt = true;
else if (streq(option, "submit-from-crypt-cpus"))
arg_submit_from_crypt_cpus = true;
else if (streq(option, "luks"))
arg_type = ANY_LUKS;
else if (streq(option, "tcrypt"))
@ -676,6 +682,12 @@ static int run(int argc, char *argv[]) {
if (arg_discards)
flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS;
if (arg_same_cpu_crypt)
flags |= CRYPT_ACTIVATE_SAME_CPU_CRYPT;
if (arg_submit_from_crypt_cpus)
flags |= CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS;
if (arg_timeout == USEC_INFINITY)
until = 0;
else

8
src/shared/crypt-util.h
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@ -11,6 +11,14 @@
#define CRYPT_LUKS NULL
#endif
#ifndef CRYPT_ACTIVATE_SAME_CPU_CRYPT
#define CRYPT_ACTIVATE_SAME_CPU_CRYPT (1 << 6)
#endif
#ifndef CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS
#define CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS (1 << 7)
#endif
DEFINE_TRIVIAL_CLEANUP_FUNC(struct crypt_device *, crypt_free);
void cryptsetup_log_glue(int level, const char *msg, void *usrptr);