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bcache: add invalidate_bytes function

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This commit is contained in:
David Teigland 2019-11-26 15:46:49 -06:00
parent 29db9c6325
commit 56a295f78c
4 changed files with 22 additions and 0 deletions
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15
lib/device/bcache-utils.c
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@ -79,6 +79,21 @@ bool bcache_read_bytes(struct bcache *cache, int fd, uint64_t start, size_t len,
return true; return true;
} }
bool bcache_invalidate_bytes(struct bcache *cache, int fd, uint64_t start, size_t len)
{
block_address bb, be;
bool result = true;
byte_range_to_block_range(cache, start, len, &bb, &be);
for (; bb != be; bb++) {
if (!bcache_invalidate(cache, fd, bb))
result = false;
}
return result;
}
//---------------------------------------------------------------- //----------------------------------------------------------------
// Writing bytes and zeroing bytes are very similar, so we factor out // Writing bytes and zeroing bytes are very similar, so we factor out

1
lib/device/bcache.h
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@ -163,6 +163,7 @@ bool bcache_read_bytes(struct bcache *cache, int fd, uint64_t start, size_t len,
bool bcache_write_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, void *data); bool bcache_write_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, void *data);
bool bcache_zero_bytes(struct bcache *cache, int fd, uint64_t start, size_t len); bool bcache_zero_bytes(struct bcache *cache, int fd, uint64_t start, size_t len);
bool bcache_set_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, uint8_t val); bool bcache_set_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, uint8_t val);
bool bcache_invalidate_bytes(struct bcache *cache, int fd, uint64_t start, size_t len);
void bcache_set_last_byte(struct bcache *cache, int fd, uint64_t offset, int sector_size); void bcache_set_last_byte(struct bcache *cache, int fd, uint64_t offset, int sector_size);
void bcache_unset_last_byte(struct bcache *cache, int fd); void bcache_unset_last_byte(struct bcache *cache, int fd);

5
lib/label/label.c
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@ -1464,6 +1464,11 @@ bool dev_write_bytes(struct device *dev, uint64_t start, size_t len, void *data)
return true; return true;
} }
bool dev_invalidate_bytes(struct device *dev, uint64_t start, size_t len)
{
return bcache_invalidate_bytes(scan_bcache, dev->bcache_fd, start, len);
}
bool dev_write_zeros(struct device *dev, uint64_t start, size_t len) bool dev_write_zeros(struct device *dev, uint64_t start, size_t len)
{ {
if (test_mode()) if (test_mode())

1
lib/label/label.h
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@ -126,6 +126,7 @@ bool dev_read_bytes(struct device *dev, uint64_t start, size_t len, void *data);
bool dev_write_bytes(struct device *dev, uint64_t start, size_t len, void *data); bool dev_write_bytes(struct device *dev, uint64_t start, size_t len, void *data);
bool dev_write_zeros(struct device *dev, uint64_t start, size_t len); bool dev_write_zeros(struct device *dev, uint64_t start, size_t len);
bool dev_set_bytes(struct device *dev, uint64_t start, size_t len, uint8_t val); bool dev_set_bytes(struct device *dev, uint64_t start, size_t len, uint8_t val);
bool dev_invalidate_bytes(struct device *dev, uint64_t start, size_t len);
void dev_set_last_byte(struct device *dev, uint64_t offset); void dev_set_last_byte(struct device *dev, uint64_t offset);
void dev_unset_last_byte(struct device *dev); void dev_unset_last_byte(struct device *dev);