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util/nvmutil: detect partial gbe rw

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we already covered this in prw() which is
what ultimately gets called, but still.

it's logically correct not to check it here.

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-14 03:29:01 +00:00
parent fe16b79537
commit df18e65835
1 changed files with 18 additions and 5 deletions
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util/nvmutil/nvmutil.c
+18 -5
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@@ -1489,6 +1489,7 @@ static void
rw_gbe_file_part(size_t p, int rw_type,
const char *rw_type_str)
{
ssize_t r;
size_t gbe_rw_size = command[cmd_index].rw_size;
u8 invert = command[cmd_index].invert;
@@ -1509,11 +1510,17 @@ rw_gbe_file_part(size_t p, int rw_type,
mem_offset = gbe_mem_offset(p ^ invert, rw_type_str);
file_offset = (off_t)gbe_file_offset(p, rw_type_str);
if (rw_gbe_file_exact(gbe_fd, mem_offset,
gbe_rw_size, file_offset, rw_type) == -1)
r = rw_gbe_file_exact(gbe_fd, mem_offset,
gbe_rw_size, file_offset, rw_type);
if (r == -1)
err(errno, "%s: %s: part %lu",
fname, rw_type_str, (ulong)p);
if ((size_t)r != gbe_rw_size)
err(EIO, "%s: partial %s: part %lu",
fname, rw_type_str, (ulong)p);
/*
* Next, we read back what was written,
* to ensure that it was done correctly.
@@ -1531,12 +1538,18 @@ rw_gbe_file_part(size_t p, int rw_type,
err(errno, "%s: fsync: part %lu (post-verification)",
fname, (ulong)p);
if (rw_gbe_file_exact(gbe_fd, pad,
gbe_rw_size, file_offset, IO_PREAD) == -1)
r = rw_gbe_file_exact(gbe_fd, pad,
gbe_rw_size, file_offset, IO_PREAD);
if (r == -1)
err(errno, "%s: pread: part %lu (post-verification)",
fname, (ulong)p);
if (memcmp(mem_offset, pad, gbe_rw_size))
if ((size_t)r != gbe_rw_size)
err(EIO, "%s: partial pread: part %lu (post-verification)",
fname, (ulong)p);
if (memcmp(mem_offset, pad, gbe_rw_size) != 0)
err(errno, "%s: pwrite: corrupt write on part %lu",
fname, (ulong)p);
}