Date: Fri, 3 Feb 2023 15:50:38 GMT From: Warner Losh <imp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 81fbd74a4b59 - main - kboot: space_avail -- how much space exists from 'start' to end of segment Message-ID: <202302031550.313FocGj022980@gitrepo.freebsd.org>
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The branch main has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=81fbd74a4b598c52957b491896ec839316ceeec3 commit 81fbd74a4b598c52957b491896ec839316ceeec3 Author: Warner Losh <imp@FreeBSD.org> AuthorDate: 2023-02-03 15:38:22 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2023-02-03 15:41:39 +0000 kboot: space_avail -- how much space exists from 'start' to end of segment Sponsored by: Netflix Reviewed by: tsoome Differential Revision: https://reviews.freebsd.org/D38313 --- stand/kboot/kboot.h | 1 + stand/kboot/seg.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/stand/kboot/kboot.h b/stand/kboot/kboot.h index dcf1487ce404..4a8fe497339e 100644 --- a/stand/kboot/kboot.h +++ b/stand/kboot/kboot.h @@ -44,6 +44,7 @@ void remove_avail(uint64_t start, uint64_t end, uint64_t type); uint64_t first_avail(uint64_t align, uint64_t min_size, uint64_t type); void print_avail(void); bool populate_avail_from_iomem(void); +uint64_t space_avail(uint64_t start); /* util.c */ bool file2str(const char *fn, char *buffer, size_t buflen); diff --git a/stand/kboot/seg.c b/stand/kboot/seg.c index 8cf3b833c9d1..947aa0a2a7a3 100644 --- a/stand/kboot/seg.c +++ b/stand/kboot/seg.c @@ -344,3 +344,22 @@ out: close(fd); return true; } + +/* + * Return the amount of space available in the segment that @start@ lives in, + * from @start@ to the end of the segment. + */ +uint64_t +space_avail(uint64_t start) +{ + for (int i = 0; i < nr_seg; i++) { + if (start >= segs[i].start && start <= segs[i].end) + return segs[i].end - start; + } + + /* + * Properly used, we should never get here. Unsure if this should be a + * panic or not. + */ + return 0; +}
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