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pstore/ram: Report backend assignments with finer granularity

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In order to more easily perform automated regression testing, this
adds pr_debug() calls to report each prz allocation which can then be
verified against persistent storage. Specifically, seeing the dividing
line between header, data, any ECC bytes. (And the general assignment
output is updated to remove the bogus ECC blocksize which isn't actually
recorded outside the prz instance.)

Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2018-11-01 14:14:47 -07:00
parent 9ee85b8bd3
commit dc80b1ea4c
2 changed files with 8 additions and 2 deletions
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4
fs/pstore/ram.c
View file

@ -853,9 +853,9 @@ static int ramoops_probe(struct platform_device *pdev)
ramoops_pmsg_size = pdata->pmsg_size;
ramoops_ftrace_size = pdata->ftrace_size;
pr_info("attached 0x%lx@0x%llx, ecc: %d/%d\n",
pr_info("using 0x%lx@0x%llx, ecc: %d\n",
cxt->size, (unsigned long long)cxt->phys_addr,
cxt->ecc_info.ecc_size, cxt->ecc_info.block_size);
cxt->ecc_info.ecc_size);
return 0;

6
fs/pstore/ram_core.c
View file

@ -576,6 +576,12 @@ struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
if (ret)
goto err;
pr_debug("attached %s 0x%zx@0x%llx: %zu header, %zu data, %zu ecc (%d/%d)\n",
prz->label, prz->size, (unsigned long long)prz->paddr,
sizeof(*prz->buffer), prz->buffer_size,
prz->size - sizeof(*prz->buffer) - prz->buffer_size,
prz->ecc_info.ecc_size, prz->ecc_info.block_size);
return prz;
err:
persistent_ram_free(prz);