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reuse merge_log to also do file extensions.

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This commit is contained in:
nvt-se 2008-11-17 09:09:17 +00:00
parent 42dd7c37fc
commit 5fc9534188
1 changed files with 20 additions and 16 deletions
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36
core/cfs/cfs-coffee.c
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@ -269,7 +269,7 @@ dir_cache_find(const char *name)
}
}
}
return -1;
}
/*---------------------------------------------------------------------------*/
@ -283,7 +283,7 @@ find_file(const char *name)
if(page >= 0) {
return page;
}
page = 0;
do {
read_header(&hdr, page);
@ -307,7 +307,7 @@ find_file(const char *name)
}
watchdog_periodic();
} while(page < COFFEE_PAGE_COUNT);
return -1;
}
/*---------------------------------------------------------------------------*/
@ -334,9 +334,8 @@ find_offset_in_file(int first_page)
}
range_start = part_size * search_limit;
range_end = range_start + part_size;
if(range_end > hdr.max_pages) {
range_end = hdr.max_pages;
if(range_end + 1 > hdr.max_pages) {
range_end = hdr.max_pages - 1;
}
/*
@ -347,7 +346,7 @@ find_offset_in_file(int first_page)
* are zeroes, then these are skipped from the calculation.
*/
for(page = first_page + range_end - 1; page >= first_page; page--) {
for(page = first_page + range_end; page >= first_page; page--) {
watchdog_periodic();
COFFEE_READ(buf, sizeof(buf), page * COFFEE_PAGE_SIZE);
for(i = COFFEE_PAGE_SIZE - 1; i >= 0; i--) {
@ -650,12 +649,13 @@ create_log(coffee_page_t file_page, struct file_header *hdr)
}
/*---------------------------------------------------------------------------*/
static int
merge_log(coffee_page_t file_page)
merge_log(coffee_page_t file_page, int extend)
{
coffee_page_t log_page, new_file_page;
struct file_header hdr, hdr2;
int fd, n;
coffee_offset_t offset;
coffee_page_t max_pages;
read_header(&hdr, file_page);
log_page = hdr.log_page;
@ -669,9 +669,10 @@ merge_log(coffee_page_t file_page)
* The reservation function adds extra space for the header, which has
* already been calculated with in the previous reservation.
*/
max_pages = hdr.max_pages * (1 << extend);
new_file_page = reserve(hdr.name,
hdr.max_pages * COFFEE_PAGE_SIZE - sizeof(hdr),
1);
max_pages * COFFEE_PAGE_SIZE - sizeof(hdr),
1);
if(new_file_page < 0) {
cfs_close(fd);
return -1;
@ -693,8 +694,8 @@ merge_log(coffee_page_t file_page)
}
} while(n != 0);
if(remove_by_page(file_page, 1, 0) < 0) {
remove_by_page(new_file_page, 0, 0);
if(remove_by_page(file_page, 1, 0) < 0) {
remove_by_page(new_file_page, 0, 0);
cfs_close(fd);
return -1;
}
@ -710,6 +711,7 @@ merge_log(coffee_page_t file_page)
for(n = 0; n < COFFEE_FD_SET_SIZE; n++) {
if(coffee_fd_set[n].file_page == file_page) {
coffee_fd_set[n].file_page = new_file_page;
coffee_fd_set[n].max_pages = max_pages;
coffee_fd_set[n].flags &= ~COFFEE_FD_MODIFIED;
coffee_fd_set[n].next_log_record = 0;
}
@ -773,7 +775,7 @@ write_log_page(struct file_desc *fdp, struct log_param *lp)
if(log_record >= log_records) {
/* The log is full; merge the log. */
PRINTF("Coffee: Merging the file %s with its log\n", hdr.name);
return merge_log(fdp->file_page);
return merge_log(fdp->file_page, 0);
}
} else {
/* Create a log structure. */
@ -1006,10 +1008,12 @@ cfs_write(int fd, const void *buf, unsigned size)
fdp = &coffee_fd_set[fd];
if(size + fdp->offset + sizeof(struct file_header) >
/* Attempt to extend the file if we try to write past the end. */
while(size + fdp->offset + sizeof(struct file_header) >
fdp->max_pages * COFFEE_PAGE_SIZE) {
size = fdp->max_pages * COFFEE_PAGE_SIZE -
fdp->offset - sizeof(struct file_header);
if(merge_log(fdp->file_page, 1) < 0) {
return -1;
}
}
if(fdp->offset < fdp->end) {