diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2012-10-18 16:51:43 +0100 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2013-02-20 13:45:13 +0100 |
| commit | e87a63c1d87904a24fca393a840207cf0451bab9 (patch) | |
| tree | edf596ae6946dd3c5c1b5e27a88c3f54753049f7 /libc/misc | |
| parent | 09e782b088e77eff01e9b08dd0f5dd4896e9d417 (diff) | |
fstatfs64: Prefer fstatfs64 system call instead of __libc_fstatfs
Using __libc_fstatfs for fstatfs64 adds a small delay as it needs to
use a 32-bit data structure to get the file info and them pass them to
the 64-bit data structure which was given as a fstatfs64 argument. Using
the system call directly should make the entire process much faster.
Also fix the arguments for fstatfs64. It takes three arguments
(see fs/fstatfs.c in Linux kernel sources) so despite what the manpage
says, the size of the buffer needs to be passed as the second argument
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/misc')
| -rw-r--r-- | libc/misc/statfs/fstatfs64.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/libc/misc/statfs/fstatfs64.c b/libc/misc/statfs/fstatfs64.c index ecdfabed1..7221a0b79 100644 --- a/libc/misc/statfs/fstatfs64.c +++ b/libc/misc/statfs/fstatfs64.c @@ -22,8 +22,10 @@ #include <string.h> #include <sys/statfs.h> #include <sys/statvfs.h> +#include <sys/syscall.h> #include <stddef.h> +#if defined __NR_fstatfs extern __typeof(fstatfs) __libc_fstatfs; /* Return information about the filesystem on which FD resides. */ @@ -42,12 +44,24 @@ int fstatfs64 (int fd, struct statfs64 *buf) buf->f_files = buf32.f_files; buf->f_ffree = buf32.f_ffree; buf->f_fsid = buf32.f_fsid; -#ifdef _STATFS_F_FRSIZE +# ifdef _STATFS_F_FRSIZE buf->f_frsize = buf32.f_frsize; -#endif +# endif buf->f_namelen = buf32.f_namelen; memcpy (buf->f_spare, buf32.f_spare, sizeof (buf32.f_spare)); return 0; } +#else +/* + * Use the fstatfs64 system call if fstatfs is not defined + * This is for backwards compatibility and it should be + * made default in the future + */ +int fstatfs64(int fd, struct statfs64 *buf) +{ + /* Signature has 2 arguments but syscalls wants 3 */ + return INLINE_SYSCALL(fstatfs64, 3, fd, sizeof(*buf), buf); +} +#endif libc_hidden_def(fstatfs64) |