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From 22dc741f63e6403d59c2c14f56fd4791265f9bbb Mon Sep 17 00:00:00 2001
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From: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
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Date: Mon, 1 Apr 2019 16:53:41 +0200
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Subject: [RHEL7.8 PATCH V2 23/47] Create: Block rounding size to max
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When passed size is smaller than chunk, mdadm rounds it to 0 but 0 there
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means max available space.
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Block it for every metadata. Remove the same check from imsm routine.
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Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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Create.c | 23 ++++++++++++++++++++---
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super-intel.c | 5 ++---
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2 files changed, 22 insertions(+), 6 deletions(-)
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diff --git a/Create.c b/Create.c
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index 6f1b228..292f92a 100644
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--- a/Create.c
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+++ b/Create.c
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@@ -27,6 +27,18 @@
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#include "md_p.h"
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#include <ctype.h>
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+static int round_size_and_verify(unsigned long long *size, int chunk)
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+{
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+ if (*size == 0)
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+ return 0;
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+ *size &= ~(unsigned long long)(chunk - 1);
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+ if (*size == 0) {
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+ pr_err("Size cannot be smaller than chunk.\n");
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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static int default_layout(struct supertype *st, int level, int verbose)
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{
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int layout = UnSet;
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@@ -248,11 +260,14 @@ int Create(struct supertype *st, char *mddev,
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pr_err("unknown level %d\n", s->level);
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return 1;
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}
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+
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if (s->size == MAX_SIZE)
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/* use '0' to mean 'max' now... */
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s->size = 0;
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if (s->size && s->chunk && s->chunk != UnSet)
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- s->size &= ~(unsigned long long)(s->chunk - 1);
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+ if (round_size_and_verify(&s->size, s->chunk))
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+ return 1;
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+
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newsize = s->size * 2;
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if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks,
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&s->chunk, s->size*2,
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@@ -267,7 +282,8 @@ int Create(struct supertype *st, char *mddev,
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/* default chunk was just set */
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if (c->verbose > 0)
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pr_err("chunk size defaults to %dK\n", s->chunk);
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- s->size &= ~(unsigned long long)(s->chunk - 1);
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+ if (round_size_and_verify(&s->size, s->chunk))
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+ return 1;
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do_default_chunk = 0;
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}
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}
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@@ -413,7 +429,8 @@ int Create(struct supertype *st, char *mddev,
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/* default chunk was just set */
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if (c->verbose > 0)
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pr_err("chunk size defaults to %dK\n", s->chunk);
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- s->size &= ~(unsigned long long)(s->chunk - 1);
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+ if (round_size_and_verify(&s->size, s->chunk))
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+ return 1;
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do_default_chunk = 0;
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}
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}
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diff --git a/super-intel.c b/super-intel.c
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index 5a7c9f8..2ba045a 100644
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--- a/super-intel.c
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+++ b/super-intel.c
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@@ -7455,9 +7455,8 @@ static int validate_geometry_imsm(struct supertype *st, int level, int layout,
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verbose);
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}
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- if (size && ((size < 1024) || (*chunk != UnSet &&
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- size < (unsigned long long) *chunk))) {
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- pr_err("Given size must be greater than 1M and chunk size.\n");
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+ if (size && (size < 1024)) {
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+ pr_err("Given size must be greater than 1M.\n");
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/* Depends on algorithm in Create.c :
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* if container was given (dev == NULL) return -1,
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* if block device was given ( dev != NULL) return 0.
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--
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2.7.5
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