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Made the use of micro logs configurable to make file modifications

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more efficient on storage types that support inline updates.

The sky platform uses logs, and the native platform uses no logs.
This commit is contained in:
nvt-se 2009-06-29 13:30:16 +00:00
parent 828439c922
commit 1e0ca9ceac
3 changed files with 29 additions and 1 deletions
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26
core/cfs/cfs-coffee.c
View file

@ -40,7 +40,7 @@
#include <limits.h>
#include <string.h>
#define DEBUG 0
#define DEBUG 1
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
@ -570,6 +570,7 @@ reserve(const char *name, coffee_page_t pages,
return file;
}
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static void
adjust_log_config(struct file_header *hdr,
uint16_t *log_record_size, uint16_t *log_records)
@ -579,7 +580,9 @@ adjust_log_config(struct file_header *hdr,
*log_records = hdr->log_records == 0 ?
COFFEE_LOG_SIZE / *log_record_size : hdr->log_records;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static uint16_t
modify_log_buffer(uint16_t log_record_size,
cfs_offset_t *offset, uint16_t *size)
@ -593,7 +596,9 @@ modify_log_buffer(uint16_t log_record_size,
}
return region;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static int
get_record_index(coffee_page_t log_page, uint16_t search_records,
uint16_t region)
@ -633,7 +638,9 @@ get_record_index(coffee_page_t log_page, uint16_t search_records,
return match_index;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static int
read_log_page(struct file_header *hdr, int16_t last_record, struct log_param *lp)
{
@ -660,7 +667,9 @@ read_log_page(struct file_header *hdr, int16_t last_record, struct log_param *lp
return lp->size;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static coffee_page_t
create_log(struct file *file, struct file_header *hdr)
{
@ -687,6 +696,7 @@ create_log(struct file *file, struct file_header *hdr)
file->flags |= COFFEE_FILE_MODIFIED;
return log_page;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
static int
merge_log(coffee_page_t file_page, int extend)
@ -764,6 +774,7 @@ merge_log(coffee_page_t file_page, int extend)
return 0;
}
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static int
find_next_record(struct file *file, coffee_page_t log_page,
int log_records)
@ -800,7 +811,9 @@ find_next_record(struct file *file, coffee_page_t log_page,
return log_record;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
#if COFFEE_MICRO_LOGS
static int
write_log_page(struct file *file, struct log_param *lp)
{
@ -868,6 +881,7 @@ write_log_page(struct file *file, struct log_param *lp)
return lp->size;
}
#endif /* COFFEE_MICRO_LOGS */
/*---------------------------------------------------------------------------*/
static int
get_available_fd(void)
@ -987,7 +1001,9 @@ cfs_read(int fd, void *buf, unsigned size)
struct file *file;
unsigned bytes_left;
int r;
#if COFFEE_MICRO_LOGS
struct log_param lp;
#endif
if(!(FD_VALID(fd) && FD_READABLE(fd))) {
return -1;
@ -1011,12 +1027,14 @@ cfs_read(int fd, void *buf, unsigned size)
while(bytes_left) {
watchdog_periodic();
r = -1;
#if COFFEE_MICRO_LOGS
if(FILE_MODIFIED(file)) {
lp.offset = fdp->offset;
lp.buf = buf;
lp.size = bytes_left;
r = read_log_page(&hdr, file->next_log_record, &lp);
}
#endif /* COFFEE_MICRO_LOGS */
/* Read from the original file if we cannot find the data in the log. */
if(r < 0) {
r = bytes_left;
@ -1034,10 +1052,12 @@ cfs_write(int fd, const void *buf, unsigned size)
{
struct file_desc *fdp;
struct file *file;
#if COFFEE_MICRO_LOGS
int i;
struct log_param lp;
cfs_offset_t bytes_left;
const char dummy[1] = { 0xff };
#endif
if(!(FD_VALID(fd) && FD_WRITABLE(fd))) {
return -1;
@ -1056,6 +1076,7 @@ cfs_write(int fd, const void *buf, unsigned size)
PRINTF("Extended the file at page %u\n", (unsigned)file->page);
}
#if COFFEE_MICRO_LOGS
if(FILE_MODIFIED(file) || fdp->offset < file->end) {
bytes_left = size;
while(bytes_left) {
@ -1085,9 +1106,12 @@ cfs_write(int fd, const void *buf, unsigned size)
COFFEE_WRITE(dummy, 1, absolute_offset(file->page, fdp->offset));
}
} else {
#endif /* COFFEE_MICRO_LOGS */
COFFEE_WRITE(buf, size, absolute_offset(file->page, fdp->offset));
fdp->offset += size;
#if COFFEE_MICRO_LOGS
}
#endif /* COFFEE_MICRO_LOGS */
if(fdp->offset > file->end) {
file->end = fdp->offset;

2
platform/native/cfs-coffee-arch.h
View file

@ -56,6 +56,8 @@
#define COFFEE_LOG_TABLE_LIMIT 256
#define COFFEE_DIR_CACHE_ENTRIES 16
#define COFFEE_MICRO_LOGS 0
#define COFFEE_WRITE(buf, size, offset) \
xmem_pwrite((char *)(buf), (size), COFFEE_START + (offset))

2
platform/sky/cfs-coffee-arch.h
View file

@ -56,6 +56,8 @@
#define COFFEE_DYN_SIZE 4*1024
#define COFFEE_LOG_SIZE 1024
#define COFFEE_MICRO_LOGS 1
/* Flash operations. */
#define COFFEE_WRITE(buf, size, offset) \
xmem_pwrite((char *)(buf), (size), COFFEE_START + (offset))