#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/sysinfo.h>
#include <uuid/uuid.h>
#include <fcntl.h>
#include <unistd.h>
return ret;
}
+int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[])
+{
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+
+ while (seen) {
+ if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
+ return 1;
+
+ seen = seen->next;
+ }
+
+ return 0;
+}
+
+int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
+ int fd, DIR *dirstream)
+{
+ u8 hash = fsid[0];
+ int slot = hash % SEEN_FSID_HASH_SIZE;
+ struct seen_fsid *seen = seen_fsid_hash[slot];
+ struct seen_fsid *alloc;
+
+ if (!seen)
+ goto insert;
+
+ while (1) {
+ if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
+ return -EEXIST;
+
+ if (!seen->next)
+ break;
+
+ seen = seen->next;
+ }
+
+insert:
+ alloc = malloc(sizeof(*alloc));
+ if (!alloc)
+ return -ENOMEM;
+
+ alloc->next = NULL;
+ memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
+ alloc->fd = fd;
+ alloc->dirstream = dirstream;
+
+ if (seen)
+ seen->next = alloc;
+ else
+ seen_fsid_hash[slot] = alloc;
+
+ return 0;
+}
+
+void free_seen_fsid(struct seen_fsid *seen_fsid_hash[])
+{
+ int slot;
+ struct seen_fsid *seen;
+ struct seen_fsid *next;
+
+ for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
+ seen = seen_fsid_hash[slot];
+ while (seen) {
+ next = seen->next;
+ close_file_or_dir(seen->fd, seen->dirstream);
+ free(seen);
+ seen = next;
+ }
+ seen_fsid_hash[slot] = NULL;
+ }
+}
+
static int group_profile_devs_min(u64 flag)
{
switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
void btrfs_config_init(void)
{
}
+
+/* Returns total size of main memory in bytes, -1UL if error. */
+unsigned long total_memory(void)
+{
+ struct sysinfo si;
+
+ if (sysinfo(&si) < 0) {
+ error("can't determine memory size");
+ return -1UL;
+ }
+ return si.totalram * si.mem_unit; /* bytes */
+}