int memcache_get (struct connection *c, const char *key, int key_len) {
if (verbosity >= 3) {
fprintf (stderr, "memcache_get: key='%s'\n", key);
}
struct fuse_file_info fi;
if (key_len >= 5 && !strncmp (key, "stats", 5)) {
int stats_len = filesys_prepare_stats(c);
return_one_key (c, key, value_buff, stats_len);
return 0;
}
cmd_get++;
if (key_len <= 0) {
return 0;
}
int r = -11;
int x;
unsigned int offset, length;
inode_id_t inode;
switch (key[0]) {
case 'c':
if (!strncmp (key, "creat", 5) && sscanf (key, "creat%d", &x) >= 1 && !parse_path (c)) {
r = ff_create (value_buff, x, &fi);
if (!r) {
return_one_long (c, key, fi.fh);
}
}
break;
case 'o':
if (!strcmp (key, "open") && !parse_path (c)) {
r = ff_open (value_buff, &fi);
if (!r) {
return_one_long (c, key, fi.fh);
}
}
break;
case 'r':
if (!strncmp (key, "read", 4) && sscanf (key, "read%u,%u,%lld", &offset, &length, &inode) >= 3) {
fi.fh = inode;
r = ff_read (NULL, value_buff, length, offset, &fi);
if (r >= 0) {
return_one_key (c, key, value_buff, r);
}
}
}
free_tmp_buffers (c);
return 0;
}
uint64 ff_estimate_numentries(const char *ffpath)
{
// get the total size of the file
int fffd = open(ffpath, O_RDONLY | O_LARGEFILE);
if (fffd == -1)
errexit("ff_read: could not open %s, %s\n", ffpath,
khstrerror(errno).c_str());
struct stat64 sb;
fstat64(fffd, &sb);
close(fffd);
// get the average size of the first 10 records
EstimateCallbackData estimate;
if (ff_read(ffpath, EstimateCallback, &estimate) < 0) {
errexit("ff_read: unable to sample file for entries estimate\n");
}
double averageSize = (double)estimate.totalSize / (double)estimate.num;
// estimate by dividing the total file size by the average record size
return (uint64)((double)sb.st_size / averageSize);
}
