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Btrfs (Linux): refactors Btrfs allocation to use profile string

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Fixes #1941
This commit is contained in:
Carter Li
2025-09-05 10:37:48 +08:00
parent b77646f23e
commit 5e068d22c8
3 changed files with 39 additions and 31 deletions
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src/detection/btrfs/btrfs.h
+2 -2
View File
@@ -8,8 +8,8 @@ typedef struct FFBtrfsDiskUsage
uint64_t total;
uint64_t used;
const char* type;
bool dup;
uint8_t copies; // 1=single/raid0/raid5/raid6, 2=dup/raid1/raid10, 3=raid1c3, 4=raid1c4
const char* profile; // single / dup / raidx
uint8_t copies;
} FFBtrfsDiskUsage;
typedef struct FFBtrfsResult
src/detection/btrfs/btrfs_linux.c
+33 -25
View File
@@ -73,35 +73,43 @@ static const char* detectAllocation(FFBtrfsResult* item, int dfd, FFstrbuf* buff
item->globalReservationUsed = ffStrbufToUInt(buffer, 0);
item->globalReservationUsed = item->globalReservationTotal - item->globalReservationUsed;
#define FF_BTRFS_DETECT_TYPE(index, _type) \
if (ffReadFileBufferRelative(subfd, #_type "/total_bytes", buffer)) \
item->allocation[index].total = ffStrbufToUInt(buffer, 0); \
\
if (ffReadFileBufferRelative(subfd, #_type "/bytes_used", buffer)) \
item->allocation[index].used = ffStrbufToUInt(buffer, 0); \
\
item->allocation[index].dup = faccessat(subfd, #_type "/dup/", F_OK, 0) == 0; \
do { \
uint8_t _copies = 1; \
if (faccessat(subfd, #_type "/raid1c4/", F_OK, 0) == 0) _copies = 4; \
else if (faccessat(subfd, #_type "/raid1c3/", F_OK, 0) == 0) _copies = 3; \
else if (faccessat(subfd, #_type "/raid1/", F_OK, 0) == 0) _copies = 2; \
else if (faccessat(subfd, #_type "/raid10/", F_OK, 0) == 0) _copies = 2; \
else if (item->allocation[index].dup) _copies = 2; /* DUP on single device */ \
item->allocation[index].copies = _copies; \
} while(0); \
\
item->allocation[index].type = #_type;
#define FF_BTRFS_DETECT_PROFILE(_index, _type, _profile, _copies) \
else if (faccessat(subfd, _type "/" _profile "/", F_OK, 0) == 0) { \
item->allocation[_index].profile = _profile; \
item->allocation[_index].copies = _copies; \
}
FF_BTRFS_DETECT_TYPE(0, data);
FF_BTRFS_DETECT_TYPE(1, metadata);
FF_BTRFS_DETECT_TYPE(2, system);
#define FF_BTRFS_DETECT_TYPE(_index, _type) \
do { \
item->allocation[_index].type = _type; \
if (ffReadFileBufferRelative(subfd, _type "/total_bytes", buffer)) \
item->allocation[_index].total = ffStrbufToUInt(buffer, 0); \
\
if (ffReadFileBufferRelative(subfd, _type "/bytes_used", buffer)) \
item->allocation[_index].used = ffStrbufToUInt(buffer, 0); \
\
if (false) {} \
FF_BTRFS_DETECT_PROFILE(_index, _type, "single", 1) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "dup", 2) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid0", 1) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid1", 2) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid10", 2) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid1c3", 3) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid1c4", 4) \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid5", 1) /* (n-1)/n */ \
FF_BTRFS_DETECT_PROFILE(_index, _type, "raid6", 1) /* (n-2)/n */ \
else { \
item->allocation[_index].profile = "unknown"; \
item->allocation[_index].copies = 1; \
} \
} while (0)
FF_BTRFS_DETECT_TYPE(0, "data");
FF_BTRFS_DETECT_TYPE(1, "metadata");
FF_BTRFS_DETECT_TYPE(2, "system");
#undef FF_BTRFS_DETECT_TYPE
if (item->allocation[0].copies > 1) // index 0 = data
item->totalSize /= item->allocation[0].copies;
return NULL;
}