[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
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@ -1887,6 +1887,24 @@ linprocfs_douuid(PFS_FILL_ARGS)
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return(0);
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}
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/*
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* Filler function for proc/sys/kernel/random/boot_id
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*/
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static int
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linprocfs_doboot_id(PFS_FILL_ARGS)
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{
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static bool firstboot = 1;
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static struct uuid uuid;
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if (firstboot) {
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kern_uuidgen(&uuid, 1);
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firstboot = 0;
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}
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sbuf_printf_uuid(sb, &uuid);
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sbuf_printf(sb, "\n");
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return(0);
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}
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/*
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* Filler function for proc/pid/auxv
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*/
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@ -2097,6 +2115,8 @@ linprocfs_init(PFS_INIT_ARGS)
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dir = pfs_create_dir(dir, "random", NULL, NULL, NULL, 0);
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pfs_create_file(dir, "uuid", &linprocfs_douuid,
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NULL, NULL, NULL, PFS_RD);
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pfs_create_file(dir, "boot_id", &linprocfs_doboot_id,
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NULL, NULL, NULL, PFS_RD);
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/* /proc/sys/vm/.... */
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dir = pfs_create_dir(sys, "vm", NULL, NULL, NULL, 0);
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