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Avoid stat/fstat in statvfs/fstatvfs (BZ #15132)

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Delay the use of stat/fstat until stat data is required.  When the
kernel returns ST_VALID, stat data is not used by __internal_statvfs.
This commit is contained in:
Eric Wong
2014-05-29 09:41:29 +05:30
committed by Siddhesh Poyarekar
parent 0d3b7a190c
commit 26b0d2e1a1
7 changed files with 44 additions and 37 deletions
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6
sysdeps/unix/sysv/linux/statvfs.c
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@ -22,22 +22,20 @@
#include <sys/statvfs.h>
extern void __internal_statvfs (const char *name, struct statvfs *buf,
struct statfs *fsbuf, struct stat64 *st);
struct statfs *fsbuf, int fd);
int
statvfs (const char *file, struct statvfs *buf)
{
struct statfs fsbuf;
struct stat64 st;
/* Get as much information as possible from the system. */
if (__statfs (file, &fsbuf) < 0)
return -1;
/* Convert the result. */
__internal_statvfs (file, buf, &fsbuf,
stat64 (file, &st) == -1 ? NULL : &st);
__internal_statvfs (file, buf, &fsbuf, -1);
/* We signal success if the statfs call succeeded. */
return 0;