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Adds some more undocumented --test options.

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This commit is contained in:
Andrea Mazzoleni 2013-02-28 23:06:42 +01:00
parent e6c44e715a
commit 4c058d25e2
8 changed files with 70 additions and 27 deletions
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29
parity.c
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@ -133,7 +133,7 @@ bail:
return -1;
}
int parity_chsize(struct snapraid_parity* parity, data_off_t size, data_off_t* out_size)
int parity_chsize(struct snapraid_parity* parity, data_off_t size, data_off_t* out_size, int skip_fallocate)
{
int ret;
@ -143,18 +143,23 @@ int parity_chsize(struct snapraid_parity* parity, data_off_t size, data_off_t* o
const char* call;
#if HAVE_FALLOCATE
/* allocate real space using the specific Linux fallocate() operation. */
/* If the underline filesystem doesn't support it, this operation fails, */
/* instead posix_fallocate() fallbacks to write the whole file. */
call = "fallocate";
ret = fallocate(parity->f, 0, 0, size);
if (!skip_fallocate) {
/* allocate real space using the specific Linux fallocate() operation. */
/* If the underline filesystem doesn't support it, this operation fails, */
/* instead posix_fallocate() fallbacks to write the whole file. */
call = "fallocate";
ret = fallocate(parity->f, 0, 0, size);
/* fallocate() returns the error number as positive integer, */
/* and in this case it doesn't set errno, just like posix_fallocate() */
/* Checking the glibc code (2.11.1 and 2.14.1) it seems that ENOSYS */
/* may be returned in errno, so we support both the return way */
if (ret > 0) { /* if a positive error is returned, convert it to errno */
errno = ret;
/* fallocate() returns the error number as positive integer, */
/* and in this case it doesn't set errno, just like posix_fallocate() */
/* Checking the glibc code (2.11.1 and 2.14.1) it seems that ENOSYS */
/* may be returned in errno, so we support both the return way */
if (ret > 0) { /* if a positive error is returned, convert it to errno */
errno = ret;
ret = -1;
}
} else {
errno = EOPNOTSUPP;
ret = -1;
}