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veloader use vectx API for kernel and modules

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The vectx API, computes the hash for verifying a file as it is read.
This avoids the overhead of reading files twice - once to verify, then
again to load.

For doing an install via loader, avoiding the need to rewind
large files is critical.

This API is only used for modules, kernel and mdimage as these are the
biggest files read by the loader.
The reduction in boot time depends on how expensive the I/O is
on any given platform.  On a fast VM we see 6% improvement.

For install via loader the first file to be verified is likely to be the
kernel, so some of the prep work (finding manifest etc) done by
verify_file() needs to be factored so it can be reused for
vectx_open().

For missing or unrecognized fingerprint entries, we fail
in vectx_open() unless verifying is disabled.

Otherwise fingerprint check happens in vectx_close() and
since this API is only used for files which must be verified
(VE_MUST) we panic if we get an incorrect hash.

Reviewed by:	imp,tsoome
MFC after:	1 week
Sponsored by:	Juniper Networks
Differential Revision:	https://reviews.freebsd.org//D23827
This commit is contained in:
Simon J. Gerraty 2020-03-09 15:48:53 +00:00
parent 98085bae8c
commit 212e103f2f
1 changed files with 1 additions and 1 deletions
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2
stand/liblua/lstd.c
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@ -83,7 +83,7 @@ fopen(const char *filename, const char *mode)
#ifdef LOADER_VERIEXEC
/* only regular files and only reading makes sense */
if (S_ISREG(st.st_mode) && !(m & O_WRONLY)) {
if (verify_file(fd, filename, 0, VE_GUESS) < 0) {
if (verify_file(fd, filename, 0, VE_GUESS, __func__) < 0) {
free(f);
close(fd);
return (NULL);