This members represents fs.aio-(max)-nr sysctl entries. While fs.aio-max-nr can be adjusted from inside of ve with traditional sysctl utility the @aio-nr is read only so we need an interface for its c/r.
Moreover I think being able to c/r from libvzctl script is better in terms of keeping c/r work in one place, so instead of handling fs.aio-max-nr with sysctl utility from inside of ve context, I do it via scripts and for this sake fs.aio-max-nr is exported via cgroup api. https://jira.sw.ru/browse/PSBM-40690 Signed-off-by: Cyrill Gorcunov <[email protected]> CC: Vladimir Davydov <[email protected]> CC: Konstantin Khorenko <[email protected]> --- kernel/ve/ve.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) Index: linux-pcs7.git/kernel/ve/ve.c =================================================================== --- linux-pcs7.git.orig/kernel/ve/ve.c +++ linux-pcs7.git/kernel/ve/ve.c @@ -1180,7 +1180,9 @@ enum { VE_CF_IPTABLES_MASK, VE_CF_PSEUDOSUPER, VE_CF_CLOCK_MONOTONIC, - VE_CF_CLOCK_BOOTBASED + VE_CF_CLOCK_BOOTBASED, + VE_CF_AIO_NR, + VE_CF_AIO_MAX_NR, }; static int ve_ts_read(struct cgroup *cg, struct cftype *cft, struct seq_file *m) @@ -1240,6 +1242,10 @@ static u64 ve_read_u64(struct cgroup *cg #endif else if (cft->private == VE_CF_PSEUDOSUPER) return cgroup_ve(cg)->is_pseudosuper; + else if (cft->private == VE_CF_AIO_NR) + return cgroup_ve(cg)->aio_nr; + else if (cft->private == VE_CF_AIO_MAX_NR) + return cgroup_ve(cg)->aio_max_nr; return 0; } @@ -1276,7 +1282,8 @@ static int ve_write_u64(struct cgroup *c { struct ve_struct *ve = cgroup_ve(cg); - if (!ve_is_super(get_exec_env())) + if (!ve_is_super(get_exec_env()) && + !ve->is_pseudosuper) return -EPERM; down_write(&ve->op_sem); @@ -1291,6 +1298,10 @@ static int ve_write_u64(struct cgroup *c else if (cft->private == VE_CF_IPTABLES_MASK) ve->ipt_mask = ve_setup_iptables_mask(value); #endif + else if (cft->private == VE_CF_AIO_NR) + ve->aio_nr = value; + else if (cft->private == VE_CF_AIO_MAX_NR) + ve->aio_max_nr = value; up_write(&ve->op_sem); return 0; } @@ -1359,6 +1370,20 @@ static struct cftype ve_cftypes[] = { .write_string = ve_ts_write, .private = VE_CF_CLOCK_BOOTBASED, }, + { + .name = "aio_nr", + .flags = CFTYPE_NOT_ON_ROOT, + .read_u64 = ve_read_u64, + .write_u64 = ve_write_u64, + .private = VE_CF_AIO_NR, + }, + { + .name = "aio_max_nr", + .flags = CFTYPE_NOT_ON_ROOT, + .read_u64 = ve_read_u64, + .write_u64 = ve_write_u64, + .private = VE_CF_AIO_MAX_NR, + }, { } }; _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
