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link.c
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#include <inttypes.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include "libgfs2.h"
#include "fsck.h"
#include "inode_hash.h"
#include "link.h"
int set_link_count(struct gfs2_sbd *sbp, uint64_t inode_no, uint32_t count)
{
struct inode_info *ii = NULL;
log_debug("Setting link count to %u for %" PRIu64 " (0x%" PRIx64 ")\n",
count, inode_no, inode_no);
/* If the list has entries, look for one that matches
* inode_no */
ii = inode_hash_search(inode_hash, inode_no);
if(ii) {
if(ii->link_count) {
log_err("Link count already set for inode #%" PRIu64 " (0x%"
PRIx64 ")!\n", inode_no, inode_no);
stack;
return -1;
}
else
ii->link_count = count;
}
else {
/* If not match was found, add a new entry and set it's
* link count to count*/
if(!(ii = (struct inode_info *) malloc(sizeof(*ii)))) {
log_err("Unable to allocate inode_info structure\n");
stack;
return -1;
}
memset(ii, 0, sizeof(*ii));
ii->inode = inode_no;
ii->link_count = count;
inode_hash_insert(inode_hash, inode_no, ii);
}
return 0;
}
int increment_link(struct gfs2_sbd *sbp, uint64_t inode_no)
{
struct inode_info *ii = NULL;
ii = inode_hash_search(inode_hash, inode_no);
/* If the list has entries, look for one that matches
* inode_no */
if(ii) {
ii->counted_links++;
log_debug("Incremented counted links to %u for %"PRIu64" (0x%"
PRIx64 ")\n", ii->counted_links, inode_no, inode_no);
return 0;
}
log_debug("No match found when incrementing link for %" PRIu64
" (0x%" PRIx64 ")!\n", inode_no, inode_no);
/* If no match was found, add a new entry and set its
* counted links to 1 */
if(!(ii = (struct inode_info *) malloc(sizeof(*ii)))) {
log_err("Unable to allocate inode_info structure\n");
stack;
return -1;
}
if(!memset(ii, 0, sizeof(*ii))) {
log_err("Unable to zero inode_info structure\n");
stack;
return -1;
}
ii->inode = inode_no;
ii->counted_links = 1;
inode_hash_insert(inode_hash, inode_no, ii);
return 0;
}
int decrement_link(struct gfs2_sbd *sbp, uint64_t inode_no)
{
struct inode_info *ii = NULL;
ii = inode_hash_search(inode_hash, inode_no);
/* If the list has entries, look for one that matches
* inode_no */
log_err("Decrementing %"PRIu64" (0x%" PRIx64 ")\n", inode_no, inode_no);
if(ii) {
ii->counted_links--;
return 0;
}
log_debug("No match found when decrementing link for %" PRIu64
" (0x%" PRIx64 ")!\n", inode_no, inode_no);
return -1;
}

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