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Renamed ckcksums -> ckdatacksums

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To clarify this only checks data reads, and to makes space for future
theoretical ck-operations:

- ckmetaredund - likely
- ckdataredund - unlikely, expensive
- ckmetacksums - unlikely, expensive
- ckdatacksums - implemented

This also tweaks the relevant mount/format/info flags a bit:

  LFS_M_CKPROGS       0x00100000 Check progs by reading back progged data
  LFS_M_CKFETCHES     0x00200000 Check block checksums before first use
  LFS_M_CKPARITY      0x00400000 Check metadata tag parity bits
  LFS_M_CKMETAREDUND+ 0x01000000 Check metadata redund blocks on reads
  LFS_M_CKDATAREDUND* 0x02000000 Check data redund blocks on reads
  LFS_M_CKMETACKSUMS* 0x04000000 Check metadata checksums on reads
  LFS_M_CKDATACKSUMS  0x08000000 Check data checksums on reads

  +Planned
  *Hypothetical

No code changes.
This commit is contained in:
Christopher Haster
2025-01-03 22:42:03 -06:00
parent 377e744acd
commit 1d21355707
5 changed files with 153 additions and 122 deletions
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lfs.h
+18 -15
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@@ -168,8 +168,9 @@ enum lfs_type {
#ifdef LFS_CKPARITY
#define LFS_F_CKPARITY 0x00400000 // Check metadata tag parity bits
#endif
#ifdef LFS_CKCKSUMS
#define LFS_F_CKCKSUMS 0x00800000 // Check data checksums on reads
#ifdef LFS_CKDATACKSUMS
#define LFS_F_CKDATACKSUMS \
0x08000000 // Check data checksums on reads
#endif
#define LFS_F_MTREEONLY 0x00000800 // Only traverse the mtree
@@ -191,8 +192,9 @@ enum lfs_type {
#ifdef LFS_CKPARITY
#define LFS_M_CKPARITY 0x00400000 // Check metadata tag parity bits
#endif
#ifdef LFS_CKCKSUMS
#define LFS_M_CKCKSUMS 0x00800000 // Check data checksums on reads
#ifdef LFS_CKDATACKSUMS
#define LFS_M_CKDATACKSUMS \
0x08000000 // Check data checksums on reads
#endif
#define LFS_M_MTREEONLY 0x00000800 // Only traverse the mtree
@@ -204,20 +206,21 @@ enum lfs_type {
#define LFS_M_CKDATA 0x00020000 // Check metadata + data checksums
// Filesystem info flags
#define LFS_I_RDONLY 0x00000001 // Filesystem mounted read only
#define LFS_I_FLUSH 0x00000040 // Filesystem mounted with LFS_M_FLUSH
#define LFS_I_SYNC 0x00000080 // Filesystem mounted with LFS_M_SYNC
#define LFS_I_RDONLY 0x00000001 // Mounted read only
#define LFS_I_FLUSH 0x00000040 // Mounted with LFS_M_FLUSH
#define LFS_I_SYNC 0x00000080 // Mounted with LFS_M_SYNC
#ifdef LFS_CKPROGS
#define LFS_I_CKPROGS 0x00100000 // Filesystem mounted with LFS_M_CKPROGS
#define LFS_I_CKPROGS 0x00100000 // Mounted with LFS_M_CKPROGS
#endif
#ifdef LFS_CKFETCHES
#define LFS_I_CKFETCHES 0x00200000 // Filesystem mounted with LFS_M_CKFETCHES
#define LFS_I_CKFETCHES 0x00200000 // Mounted with LFS_M_CKFETCHES
#endif
#ifdef LFS_CKPARITY
#define LFS_I_CKPARITY 0x00400000 // Filesystem mounted with LFS_M_CKPARITY
#define LFS_I_CKPARITY 0x00400000 // Mounted with LFS_M_CKPARITY
#endif
#ifdef LFS_CKCKSUMS
#define LFS_I_CKCKSUMS 0x00800000 // Filesystem mounted with LFS_M_CKCKSUMS
#ifdef LFS_CKDATACKSUMS
#define LFS_I_CKDATACKSUMS \
0x08000000 // Mounted with LFS_M_CKDATACKSUMS
#endif
#define LFS_I_INCONSISTENT \
@@ -609,7 +612,7 @@ typedef struct lfsr_omdir {
// lfs_block_t tail[2];
//} lfs_mdir_t;
#ifdef LFS_CKCKSUMS
#ifdef LFS_CKDATACKSUMS
// context for validating data
typedef struct lfsr_ck {
// cksize=0 => no checksum
@@ -629,7 +632,7 @@ typedef struct lfsr_data {
struct {
lfs_block_t block;
lfs_size_t off;
#ifdef LFS_CKCKSUMS
#ifdef LFS_CKDATACKSUMS
lfsr_ck_t ck;
#endif
} disk;
@@ -662,7 +665,7 @@ typedef lfsr_data_t lfsr_sprout_t;
typedef struct lfsr_bptr {
lfsr_data_t data;
#ifndef LFS_CKCKSUMS
#ifndef LFS_CKDATACKSUMS
lfs_size_t cksize;
uint32_t cksum;
#endif