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src/attr_replace_test: limit size of extended attribute value

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The maximum size for extended attribute values is 65536 (XATTR_SIZE_MAX).
Since there are filesystems that can set blksize to really big values
(CephFS for example has a default of 4M), it's easy to have this test
failing with fsetxattr returning -E2BIG.

Cc: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Luis Henriques
2019-05-21 09:28:36 +01:00
committed by Eryu Guan
parent 828d146a86
commit c958969323
1 changed files with 3 additions and 0 deletions
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src/attr_replace_test.c
+3
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@@ -9,6 +9,8 @@
#include <sys/types.h>
#include <sys/xattr.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <linux/limits.h>
#define die() do { perror(""); \
fprintf(stderr, "error at line %d\n", __LINE__); \
@@ -44,6 +46,7 @@ int main(int argc, char *argv[])
size = sbuf.st_blksize * 3 / 4;
if (!size)
fail("Invalid st_blksize(%ld)\n", sbuf.st_blksize);
size = MIN(size, XATTR_SIZE_MAX);
value = malloc(size);
if (!value)
fail("Failed to allocate memory\n");