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Better performance in fix keeping track of which part of the files is not initialized.

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This commit is contained in:
Andrea Mazzoleni 2011-10-09 07:51:25 +02:00
parent 59c7c7380c
commit 1dbd801dcb
8 changed files with 219 additions and 152 deletions
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19
parity.h
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@ -21,6 +21,13 @@
/****************************************************************************/
/* parity */
struct snapraid_parity {
char path[PATH_MAX]; /**< Path of the file. */
int f; /**< Handle of the file. */
struct stat st; /**< Stat info of the opened file. */
data_off_t valid_size; /**< Size of the valid data. */
};
/**
* Computes the size of the parity data in number of blocks.
*/
@ -29,32 +36,32 @@ block_off_t parity_resize(struct snapraid_state* state);
/**
* Creates the parity file.
*/
int parity_create(const char* path, data_off_t size);
int parity_create(struct snapraid_parity* parity, const char* path, data_off_t size);
/**
* Opens an already existing parity file.
*/
int parity_open(const char* path);
int parity_open(struct snapraid_parity* parity, const char* path);
/**
* Flushes the parity file in the disk.
*/
int parity_sync(const char* path, int f);
int parity_sync(struct snapraid_parity* parity);
/**
* Closes the parity file.
*/
int parity_close(const char* path, int f);
int parity_close(struct snapraid_parity* parity);
/**
* Read a block from the parity file.
*/
int parity_read(const char* parity_path, int parity_f, block_off_t pos, unsigned char* block_buffer, unsigned block_size);
int parity_read(struct snapraid_parity* parity, block_off_t pos, unsigned char* block_buffer, unsigned block_size);
/**
* Writes a block in the parity file.
*/
int parity_write(const char* parity_path, int parity_f, block_off_t pos, unsigned char* block_buffer, unsigned block_size);
int parity_write(struct snapraid_parity* parity, block_off_t pos, unsigned char* block_buffer, unsigned block_size);
#endif