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fs/minix: Fix sector promotion to 64-bit.

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While on it make GRUB_MINIX_ZONE2SECT into function.

Found by: Coverity scan
This commit is contained in:
Vladimir Serbinenko 2015-01-25 13:21:32 +01:00
parent ac602ce700
commit ca793e9c05
1 changed files with 23 additions and 16 deletions
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37
grub-core/fs/minix.c
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@ -82,17 +82,6 @@ typedef grub_uint16_t grub_minix_ino_t;
#define GRUB_MINIX_INODE_DINDIR_ZONE(data) (grub_minix_to_cpu_n \
(data->inode.double_indir_zone))
#ifndef MODE_MINIX3
#define GRUB_MINIX_LOG2_ZONESZ (GRUB_MINIX_LOG2_BSIZE \
+ grub_minix_to_cpu16 (data->sblock.log2_zone_size))
#endif
#ifdef MODE_MINIX3
#define GRUB_MINIX_ZONE2SECT(zone) ((zone) * data->block_size)
#else
#define GRUB_MINIX_ZONE2SECT(zone) ((zone) << GRUB_MINIX_LOG2_ZONESZ)
#endif
#ifdef MODE_MINIX3
struct grub_minix_sblock
@ -182,6 +171,23 @@ static grub_dl_t my_mod;
static grub_err_t grub_minix_find_file (struct grub_minix_data *data,
const char *path);
#ifdef MODE_MINIX3
static inline grub_disk_addr_t
grub_minix_zone2sect (struct grub_minix_data *data, grub_minix_uintn_t zone)
{
return ((grub_disk_addr_t) zone) * data->block_size;
}
#else
static inline grub_disk_addr_t
grub_minix_zone2sect (struct grub_minix_data *data, grub_minix_uintn_t zone)
{
int log2_zonesz = (GRUB_MINIX_LOG2_BSIZE
+ grub_minix_to_cpu16 (data->sblock.log2_zone_size));
return (((grub_disk_addr_t) zone) << log2_zonesz);
}
#endif
/* Read the block pointer in ZONE, on the offset NUM. */
static grub_minix_uintn_t
grub_get_indir (struct grub_minix_data *data,
@ -190,7 +196,7 @@ grub_get_indir (struct grub_minix_data *data,
{
grub_minix_uintn_t indirn;
grub_disk_read (data->disk,
GRUB_MINIX_ZONE2SECT(zone),
grub_minix_zone2sect(data, zone),
sizeof (grub_minix_uintn_t) * num,
sizeof (grub_minix_uintn_t), (char *) &indirn);
return grub_minix_to_cpu_n (indirn);
@ -281,7 +287,7 @@ grub_minix_read_file (struct grub_minix_data *data,
for (i = posblock; i < blockcnt; i++)
{
grub_disk_addr_t blknr;
grub_minix_uintn_t blknr;
grub_uint64_t blockend = data->block_size << GRUB_DISK_SECTOR_BITS;
grub_off_t skipfirst = 0;
@ -310,7 +316,7 @@ grub_minix_read_file (struct grub_minix_data *data,
data->disk->read_hook = read_hook;
data->disk->read_hook_data = read_hook_data;
grub_disk_read (data->disk,
GRUB_MINIX_ZONE2SECT(blknr),
grub_minix_zone2sect(data, blknr),
skipfirst, blockend, buf);
data->disk->read_hook = 0;
if (grub_errno)
@ -336,7 +342,8 @@ grub_minix_read_inode (struct grub_minix_data *data, grub_minix_ino_t ino)
/* The first inode in minix is inode 1. */
ino--;
block = GRUB_MINIX_ZONE2SECT (2 + grub_minix_to_cpu16 (sblock->inode_bmap_size)
block = grub_minix_zone2sect (data,
2 + grub_minix_to_cpu16 (sblock->inode_bmap_size)
+ grub_minix_to_cpu16 (sblock->zone_bmap_size));
block += ino / (GRUB_DISK_SECTOR_SIZE / sizeof (struct grub_minix_inode));
int offs = (ino % (GRUB_DISK_SECTOR_SIZE