-
-
Notifications
You must be signed in to change notification settings - Fork 404
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
linux: move libnl code into separate file
Move all the code using libnl functionality into a separate file to ease modifications. No functional change.
- Loading branch information
Showing
5 changed files
with
153 additions
and
113 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| /* | ||
| htop - linux/LibNl.c | ||
| (C) 2024 htop dev team | ||
| Released under the GNU GPLv2+, see the COPYING file | ||
| in the source distribution for its full text. | ||
| */ | ||
|
|
||
| #include "config.h" // IWYU pragma: keep | ||
|
|
||
| #ifndef HAVE_DELAYACCT | ||
| #error Compiling this file requires HAVE_DELAYACCT | ||
| #endif | ||
|
|
||
| #include "linux/LibNl.h" | ||
|
|
||
| #include <linux/netlink.h> | ||
| #include <linux/taskstats.h> | ||
|
|
||
| #include <netlink/attr.h> | ||
| #include <netlink/handlers.h> | ||
| #include <netlink/msg.h> | ||
| #include <netlink/netlink.h> | ||
| #include <netlink/socket.h> | ||
| #include <netlink/genl/genl.h> | ||
| #include <netlink/genl/ctrl.h> | ||
|
|
||
|
|
||
| static void initNetlinkSocket(LinuxProcessTable* this) { | ||
| this->netlink_socket = nl_socket_alloc(); | ||
| if (this->netlink_socket == NULL) { | ||
| return; | ||
| } | ||
| if (nl_connect(this->netlink_socket, NETLINK_GENERIC) < 0) { | ||
| return; | ||
| } | ||
| this->netlink_family = genl_ctrl_resolve(this->netlink_socket, TASKSTATS_GENL_NAME); | ||
| } | ||
|
|
||
| void LibNl_destroyNetlinkSocket(LinuxProcessTable* this) { | ||
| if (!this->netlink_socket) | ||
| return; | ||
|
|
||
| nl_close(this->netlink_socket); | ||
| nl_socket_free(this->netlink_socket); | ||
| this->netlink_socket = NULL; | ||
| } | ||
|
|
||
| static int handleNetlinkMsg(struct nl_msg* nlmsg, void* linuxProcess) { | ||
| struct nlmsghdr* nlhdr; | ||
| struct nlattr* nlattrs[TASKSTATS_TYPE_MAX + 1]; | ||
| const struct nlattr* nlattr; | ||
| struct taskstats stats; | ||
| int rem; | ||
| LinuxProcess* lp = (LinuxProcess*) linuxProcess; | ||
|
|
||
| nlhdr = nlmsg_hdr(nlmsg); | ||
|
|
||
| if (genlmsg_parse(nlhdr, 0, nlattrs, TASKSTATS_TYPE_MAX, NULL) < 0) { | ||
| return NL_SKIP; | ||
| } | ||
|
|
||
| if ((nlattr = nlattrs[TASKSTATS_TYPE_AGGR_PID]) || (nlattr = nlattrs[TASKSTATS_TYPE_NULL])) { | ||
| memcpy(&stats, nla_data(nla_next(nla_data(nlattr), &rem)), sizeof(stats)); | ||
| assert(Process_getPid(&lp->super) == (pid_t)stats.ac_pid); | ||
|
|
||
| // The xxx_delay_total values wrap around on overflow. | ||
| // (Linux Kernel "Documentation/accounting/taskstats-struct.rst") | ||
| unsigned long long int timeDelta = stats.ac_etime * 1000 - lp->delay_read_time; | ||
| #define DELTAPERC(x, y) (timeDelta ? MINIMUM((float)((x) - (y)) / timeDelta * 100.0f, 100.0f) : NAN) | ||
| lp->cpu_delay_percent = DELTAPERC(stats.cpu_delay_total, lp->cpu_delay_total); | ||
| lp->blkio_delay_percent = DELTAPERC(stats.blkio_delay_total, lp->blkio_delay_total); | ||
| lp->swapin_delay_percent = DELTAPERC(stats.swapin_delay_total, lp->swapin_delay_total); | ||
| #undef DELTAPERC | ||
|
|
||
| lp->swapin_delay_total = stats.swapin_delay_total; | ||
| lp->blkio_delay_total = stats.blkio_delay_total; | ||
| lp->cpu_delay_total = stats.cpu_delay_total; | ||
| lp->delay_read_time = stats.ac_etime * 1000; | ||
| } | ||
| return NL_OK; | ||
| } | ||
|
|
||
| void LibNl_readDelayAcctData(LinuxProcessTable* this, LinuxProcess* process) { | ||
| struct nl_msg* msg; | ||
|
|
||
| if (!this->netlink_socket) { | ||
| initNetlinkSocket(this); | ||
| if (!this->netlink_socket) { | ||
| goto delayacct_failure; | ||
| } | ||
| } | ||
|
|
||
| if (nl_socket_modify_cb(this->netlink_socket, NL_CB_VALID, NL_CB_CUSTOM, handleNetlinkMsg, process) < 0) { | ||
| goto delayacct_failure; | ||
| } | ||
|
|
||
| if (! (msg = nlmsg_alloc())) { | ||
| goto delayacct_failure; | ||
| } | ||
|
|
||
| if (! genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, this->netlink_family, 0, NLM_F_REQUEST, TASKSTATS_CMD_GET, TASKSTATS_VERSION)) { | ||
| nlmsg_free(msg); | ||
| } | ||
|
|
||
| if (nla_put_u32(msg, TASKSTATS_CMD_ATTR_PID, Process_getPid(&process->super)) < 0) { | ||
| nlmsg_free(msg); | ||
| } | ||
|
|
||
| if (nl_send_sync(this->netlink_socket, msg) < 0) { | ||
| goto delayacct_failure; | ||
| } | ||
|
|
||
| if (nl_recvmsgs_default(this->netlink_socket) < 0) { | ||
| goto delayacct_failure; | ||
| } | ||
|
|
||
| return; | ||
|
|
||
| delayacct_failure: | ||
| process->swapin_delay_percent = NAN; | ||
| process->blkio_delay_percent = NAN; | ||
| process->cpu_delay_percent = NAN; | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| #ifndef HEADER_LibNl | ||
| #define HEADER_LibNl | ||
| /* | ||
| htop - linux/LibNl.h | ||
| (C) 2024 htop dev team | ||
| Released under the GNU GPLv2+, see the COPYING file | ||
| in the source distribution for its full text. | ||
| */ | ||
|
|
||
| #include "linux/LinuxProcess.h" | ||
| #include "linux/LinuxProcessTable.h" | ||
|
|
||
|
|
||
| void LibNl_destroyNetlinkSocket(LinuxProcessTable* this); | ||
|
|
||
| void LibNl_readDelayAcctData(LinuxProcessTable* this, LinuxProcess* process); | ||
|
|
||
| #endif /* HEADER_LibNl */ |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters