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In Windows leave 256 MB of free space in the parity disk

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This is done to avoid the annoying warning message of
disk full.
This commit is contained in:
Andrea Mazzoleni 2016-07-27 23:06:59 +02:00
parent 6637d712a3
commit 5911da55c0
1 changed files with 51 additions and 0 deletions
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51
cmdline/parity.c
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@ -348,6 +348,49 @@ static int parity_handle_fill(struct snapraid_split_handle* split, data_off_t si
data_off_t delta;
data_off_t block_mask;
#ifdef _WIN32
/*
* In Windows we want to avoid the annoying warning
* message of disk full.
*
* To ensure to leave some space available, we first create
* a spaceholder file >200 MB, to ensure to not fill completely
* the disk.
*/
char spaceholder_path[PATH_MAX];
data_off_t spaceholder_size = 256 * 1024 * 1024;
int spaceholder_f;
pathprint(spaceholder_path, sizeof(spaceholder_path), "%s%s", split->path, ".spaceholder");
spaceholder_f = open(spaceholder_path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0600);
if (spaceholder_f == -1) {
log_fatal("Failed to create space holder file '%s'.\n", spaceholder_path);
return -1;
}
if (ftruncate(spaceholder_f, spaceholder_size) != 0) {
log_fatal("WARNING Failed to resize the space holder file '%s' to %llu bytes.\n", spaceholder_path, spaceholder_size);
log_fatal("Assuming that no more space is available.\n");
close(spaceholder_f);
remove(spaceholder_path);
return 0;
}
if (fsync(spaceholder_f) != 0) {
log_fatal("Failed to sync the space holder file '%s'.\n", spaceholder_path);
close(spaceholder_f);
remove(spaceholder_path);
return -1;
}
if (close(spaceholder_f) != 0) {
log_fatal("Failed to close the space holder file '%s'.\n", spaceholder_path);
remove(spaceholder_path);
return -1;
}
#endif
/* mask of bits used by the block size */
block_mask = ((data_off_t)block_size) - 1;
@ -390,6 +433,14 @@ static int parity_handle_fill(struct snapraid_split_handle* split, data_off_t si
/* LCOV_EXCL_STOP */
}
#ifdef _WIN32
/* now delete the spaceholder file */
if (remove(spaceholder_path) != 0) {
log_fatal("WARNING Failed to remove the space holder file '%s'.\n", spaceholder_path);
log_fatal("Continuing anyway.\n");
}
#endif
/* shrink to the expected size to ensure to throw away any extra */
/* data allocated when the grow operation fails */
return parity_handle_shrink(split, base);