| Message ID | 8e69455b0e3bc339ca6c00f04fe86660e2aad58b.1675789134.git.pabeni@redhat.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 135746c61fa6d7f66dc079027304eaa4d35fe942 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: introduce rps_default_mask | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Clearly marked for net-next, async |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/subject_prefix | success | Link |
| netdev/cover_letter | success | Series has a cover letter |
| netdev/patch_count | success | Link |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 2 this patch: 2 |
| netdev/cc_maintainers | success | CCed 5 of 5 maintainers |
| netdev/build_clang | success | Errors and warnings before: 1 this patch: 1 |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/check_selftest | success | No net selftest shell script |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 2 this patch: 2 |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 64 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
On Tue, Feb 07, 2023 at 07:44:55PM +0100, Paolo Abeni wrote: > Will be used by the following patch to avoid code > duplication. No functional changes intended. > > The only difference is that now flow_limit_cpu_sysctl() will > always compute the flow limit mask on each read operation, > even when read() will not return any byte to user-space. > > Note that the new helper is placed under a new #ifdef at > the file start to better fit the usage in the later patch > > Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Simon Horman <simon.horman@corigine.com>
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c index e7b98162c632..6935ecdc84b0 100644 --- a/net/core/sysctl_net_core.c +++ b/net/core/sysctl_net_core.c @@ -45,6 +45,33 @@ EXPORT_SYMBOL(sysctl_fb_tunnels_only_for_init_net); int sysctl_devconf_inherit_init_net __read_mostly; EXPORT_SYMBOL(sysctl_devconf_inherit_init_net); +#if IS_ENABLED(CONFIG_NET_FLOW_LIMIT) +static void dump_cpumask(void *buffer, size_t *lenp, loff_t *ppos, + struct cpumask *mask) +{ + char kbuf[128]; + int len; + + if (*ppos || !*lenp) { + *lenp = 0; + return; + } + + len = min(sizeof(kbuf) - 1, *lenp); + len = scnprintf(kbuf, len, "%*pb", cpumask_pr_args(mask)); + if (!len) { + *lenp = 0; + return; + } + + if (len < *lenp) + kbuf[len++] = '\n'; + memcpy(buffer, kbuf, len); + *lenp = len; + *ppos += len; +} +#endif + #ifdef CONFIG_RPS static int rps_sock_flow_sysctl(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) @@ -155,13 +182,6 @@ static int flow_limit_cpu_sysctl(struct ctl_table *table, int write, write_unlock: mutex_unlock(&flow_limit_update_mutex); } else { - char kbuf[128]; - - if (*ppos || !*lenp) { - *lenp = 0; - goto done; - } - cpumask_clear(mask); rcu_read_lock(); for_each_possible_cpu(i) { @@ -171,17 +191,7 @@ static int flow_limit_cpu_sysctl(struct ctl_table *table, int write, } rcu_read_unlock(); - len = min(sizeof(kbuf) - 1, *lenp); - len = scnprintf(kbuf, len, "%*pb", cpumask_pr_args(mask)); - if (!len) { - *lenp = 0; - goto done; - } - if (len < *lenp) - kbuf[len++] = '\n'; - memcpy(buffer, kbuf, len); - *lenp = len; - *ppos += len; + dump_cpumask(buffer, lenp, ppos, mask); } done:
Will be used by the following patch to avoid code duplication. No functional changes intended. The only difference is that now flow_limit_cpu_sysctl() will always compute the flow limit mask on each read operation, even when read() will not return any byte to user-space. Note that the new helper is placed under a new #ifdef at the file start to better fit the usage in the later patch Signed-off-by: Paolo Abeni <pabeni@redhat.com> --- v3 -> v4: - fix warning reported by the kernel test robot --- net/core/sysctl_net_core.c | 46 +++++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 18 deletions(-)