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39 lines
1.1 KiB
39 lines
1.1 KiB
From 685bcc56351b3e46b69d46118d23268b69052097 Mon Sep 17 00:00:00 2001 |
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From: Ondrej Kozina <okozina@redhat.com> |
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Date: Tue, 19 Jun 2018 14:07:20 +0200 |
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Subject: [PATCH 1/4] Zero length lseek blockwise i/o should return zero. |
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Note that both functions perform seek operations aligned to sector |
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boundary if possible before returning. |
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Unaligned input offset gets aligned on first preceding sector |
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boundary. |
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--- |
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lib/utils_io.c | 4 ++-- |
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1 file changed, 2 insertions(+), 2 deletions(-) |
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diff --git a/lib/utils_io.c b/lib/utils_io.c |
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index 0f671d6..94c4ef6 100644 |
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--- a/lib/utils_io.c |
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+++ b/lib/utils_io.c |
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@@ -199,7 +199,7 @@ ssize_t write_lseek_blockwise(int fd, size_t bsize, size_t alignment, |
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if (lseek(fd, offset - frontHang, SEEK_SET) < 0) |
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return -1; |
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- if (frontHang) { |
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+ if (frontHang && length) { |
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if (posix_memalign(&frontPadBuf, alignment, bsize)) |
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return -1; |
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@@ -253,7 +253,7 @@ ssize_t read_lseek_blockwise(int fd, size_t bsize, size_t alignment, |
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if (lseek(fd, offset - frontHang, SEEK_SET) < 0) |
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return -1; |
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- if (frontHang) { |
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+ if (frontHang && length) { |
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if (posix_memalign(&frontPadBuf, alignment, bsize)) |
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return -1; |
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-- |
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1.8.3.1 |
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