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udf: Unify types in anchor block detection 

When detecting last recorded block and from it derived anchor block
position, we were mixing unsigned long, u32, and sector_t types. Since
udf supports only 32-bit block numbers this is harmless but sometimes
makes things awkward. Convert everything to udf_pblk_t and also handle
the situation when block device size would not fit into udf_pblk_t.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2023-01-18 13:55:31 +01:00
parent 1ea1cd11c7
commit bd904f3c74
3 changed files with 8 additions and 5 deletions
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7
fs/udf/lowlevel.c
View File

@ -45,7 +45,7 @@ unsigned int udf_get_last_session(struct super_block *sb)
return 0;
}
unsigned long udf_get_last_block(struct super_block *sb)
udf_pblk_t udf_get_last_block(struct super_block *sb)
{
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
unsigned long lblock = 0;
@ -54,8 +54,11 @@ unsigned long udf_get_last_block(struct super_block *sb)
* The cdrom layer call failed or returned obviously bogus value?
* Try using the device size...
*/
if (!cdi || cdrom_get_last_written(cdi, &lblock) || lblock == 0)
if (!cdi || cdrom_get_last_written(cdi, &lblock) || lblock == 0) {
if (sb_bdev_nr_blocks(sb) > ~(udf_pblk_t)0)
return 0;
lblock = sb_bdev_nr_blocks(sb);
}
if (lblock)
return lblock - 1;

4
fs/udf/super.c
View File

@ -1861,10 +1861,10 @@ static int udf_check_anchor_block(struct super_block *sb, sector_t block,
* Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
* of anchors.
*/
static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
static int udf_scan_anchors(struct super_block *sb, udf_pblk_t *lastblock,
struct kernel_lb_addr *fileset)
{
sector_t last[6];
udf_pblk_t last[6];
int i;
struct udf_sb_info *sbi = UDF_SB(sb);
int last_count = 0;

2
fs/udf/udfdecl.h
View File

@ -196,7 +196,7 @@ extern void udf_new_tag(char *, uint16_t, uint16_t, uint16_t, uint32_t, int);
/* lowlevel.c */
extern unsigned int udf_get_last_session(struct super_block *);
extern unsigned long udf_get_last_block(struct super_block *);
udf_pblk_t udf_get_last_block(struct super_block *);
/* partition.c */
extern uint32_t udf_get_pblock(struct super_block *, uint32_t, uint16_t,