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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-31 01:51:16 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-31 01:51:16 -0400 |
| commit | 3a2c02424d9824f5cdea4ebd32ff929b2b1f49c6 (patch) | |
| tree | de7827ff96076cb4d181ed781c418601906fa772 /ChangeLog | |
| parent | 636064eb4c03397c86aa26e489e68f952bd5e53f (diff) | |
| download | glibc-3a2c02424d9824f5cdea4ebd32ff929b2b1f49c6.tar.gz | |
Cache network interface information
Whenever getaddrinfo needed network interface information it used the
netlink interface to read the information every single time. The
problem is that this information can change at any time.
The patch implements monitoring of the network interfaces through
nscd. If no change is detected the previously read information can
be reused (which is the norm). This timestamp information is also
made available to other processes using the shared memory segment
between nscd and those processes.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 26 |
1 files changed, 26 insertions, 0 deletions
@@ -1,3 +1,29 @@ +2011-10-31 Ulrich Drepper <drepper@gmail.com> + + * include/ifaddrs.h: Declare __free_in6ai and __bump_nl_timestamp. + * inet/check_pf.c: Provide dummy versions of __free_in6ai and + __bump_nl_timestamp. + * nscd/connections (nscd_init): When host database is served open + netlink socket and request notification about configuration changes. + (main_loop_poll): Track netlink file descriptor and bump timestamp + in case data becomes available. + (main_loop_epoll): Likewise. + * nscd/nscd-client.h (DB_VERSION): Bump to 2. + (database_pers_head): Add extra_data fileds. + Declare __nscd_get_mapping and __nscd_get_nl_timestamp. + * nscd/nscd_gethst_r.c (__nscd_get_nl_timestamp): New function. + * nscd/nscd_helper.c (__nscd_get_mapping): Renamed from get_mapping. + Adjust caller. + * sysdeps/posix/getaddrinfo.c (getaddrinfo): Don't call free on + in6ai data, call __free_in6ai. + * sysdeps/unix/sysv/linux/Makefile [subdir=nscd] (sysdep-CFLAGS): + Add -DHAVE_NETLINK. + * sysdeps/unix/sysv/linux/check_pf.c: Major rewrite. Cache the + interface information. Reuse previous data if netlink timestamp + is not changed. + (__bump_nl_timestamp): New function. + (__free_in6ai): New function. + 2011-10-30 Ulrich Drepper <drepper@gmail.com> * sysdeps/unix/sysv/linux/check_pf.c (make_request): Don't call |