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29 #define _LARGEFILE64_SOURCE
35 #include <f2fs_format_utils.h>
37 #include <sparse/sparse.h>
39 struct selabel_handle;
41 #include "make_f2fs.h"
43 extern void flush_sparse_buffs();
45 struct f2fs_configuration config;
46 struct sparse_file *f2fs_sparse_file;
47 extern int dlopenf2fs();
49 static void reset_f2fs_info() {
50 // Reset all the global data structures used by make_f2fs so it
51 // can be called again.
52 memset(&config, 0, sizeof(config));
54 if (f2fs_sparse_file) {
55 sparse_file_destroy(f2fs_sparse_file);
56 f2fs_sparse_file = NULL;
60 int make_f2fs_sparse_fd(int fd, long long len,
61 const char *mountpoint, struct selabel_handle *sehnd)
63 if (dlopenf2fs() < 0) {
67 f2fs_init_configuration(&config);
68 len &= ~((__u64)(F2FS_BLKSIZE - 1));
69 config.total_sectors = len / config.sector_size;
70 config.start_sector = 0;
71 f2fs_sparse_file = sparse_file_new(F2FS_BLKSIZE, len);
73 sparse_file_write(f2fs_sparse_file, fd, /*gzip*/0, /*sparse*/1, /*crc*/0);
74 sparse_file_destroy(f2fs_sparse_file);
76 f2fs_sparse_file = NULL;