diff options
| author | Fernando Apesteguía <fernape@FreeBSD.org> | 2022-03-08 14:19:53 +0000 |
|---|---|---|
| committer | Fernando Apesteguía <fernape@FreeBSD.org> | 2022-04-11 16:23:28 +0000 |
| commit | 0f2041a5b03259a8a7b20ffc98e34884cc5590b3 (patch) | |
| tree | 6a3f26a6d27f09cdabcce3f468aa7923a4343586 | |
| parent | 4496aecb56e667ab11bbbb92e164d3277205bae6 (diff) | |
| download | src-0f2041a5b03259a8a7b20ffc98e34884cc5590b3.tar.gz src-0f2041a5b03259a8a7b20ffc98e34884cc5590b3.zip | |
[linprocfs] add sys/kernel/random/boot_id
This file holds a UUID that is invariant for every boot. In our case, it is
invariant per mount.
PR: 262369
Reported by: sodynet1@gmail.com
Approved by: dchagin@
Differential Revision: https://reviews.freebsd.org/D34860
| -rw-r--r-- | sys/compat/linprocfs/linprocfs.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/sys/compat/linprocfs/linprocfs.c b/sys/compat/linprocfs/linprocfs.c index 8a9525b4375d..f930c1d71987 100644 --- a/sys/compat/linprocfs/linprocfs.c +++ b/sys/compat/linprocfs/linprocfs.c @@ -1888,6 +1888,24 @@ linprocfs_douuid(PFS_FILL_ARGS) } /* + * Filler function for proc/sys/kernel/random/boot_id + */ +static int +linprocfs_doboot_id(PFS_FILL_ARGS) +{ + static bool firstboot = 1; + static struct uuid uuid; + + if (firstboot) { + kern_uuidgen(&uuid, 1); + firstboot = 0; + } + sbuf_printf_uuid(sb, &uuid); + sbuf_printf(sb, "\n"); + return(0); +} + +/* * Filler function for proc/pid/auxv */ static int @@ -2097,6 +2115,8 @@ linprocfs_init(PFS_INIT_ARGS) dir = pfs_create_dir(dir, "random", NULL, NULL, NULL, 0); pfs_create_file(dir, "uuid", &linprocfs_douuid, NULL, NULL, NULL, PFS_RD); + pfs_create_file(dir, "boot_id", &linprocfs_doboot_id, + NULL, NULL, NULL, PFS_RD); /* /proc/sys/vm/.... */ dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0); |