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authorUlrich Drepper <drepper@redhat.com>2006-02-11 17:55:47 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-11 21:41:10 -0800
commitcff2b760096d1e6feaa31948e7af4abbefe47822 (patch)
tree9bd6d2796ffb8c6611ca06b74c6349f8f1289ce2 /arch/x86_64/ia32/sys_ia32.c
parent25bf368b3d98668c5d5f38e2201d8bca16e52680 (diff)
[PATCH] fstatat64 support
The *at patches introduced fstatat and, due to inusfficient research, I used the newfstat functions generally as the guideline. The result is that on 32-bit platforms we don't have all the information needed to implement fstatat64. This patch modifies the code to pass up 64-bit information if __ARCH_WANT_STAT64 is defined. I renamed the syscall entry point to make this clear. Other archs will continue to use the existing code. On x86-64 the compat code is implemented using a new sys32_ function. this is what is done for the other stat syscalls as well. This patch might break some other archs (those which define __ARCH_WANT_STAT64 and which already wired up the syscall). Yet others might need changes to accomodate the compatibility mode. I really don't want to do that work because all this stat handling is a mess (more so in glibc, but the kernel is also affected). It should be done by the arch maintainers. I'll provide some stand-alone test shortly. Those who are eager could compile glibc and run 'make check' (no installation needed). The patch below has been tested on x86 and x86-64. Signed-off-by: Ulrich Drepper <drepper@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/ia32/sys_ia32.c')
-rw-r--r--arch/x86_64/ia32/sys_ia32.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c
index 54481af5344..2bc55af9541 100644
--- a/arch/x86_64/ia32/sys_ia32.c
+++ b/arch/x86_64/ia32/sys_ia32.c
@@ -180,6 +180,28 @@ sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
return ret;
}
+asmlinkage long
+sys32_fstatat(unsigned int dfd, char __user *filename,
+ struct stat64 __user* statbuf, int flag)
+{
+ struct kstat stat;
+ int error = -EINVAL;
+
+ if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
+ goto out;
+
+ if (flag & AT_SYMLINK_NOFOLLOW)
+ error = vfs_lstat_fd(dfd, filename, &stat);
+ else
+ error = vfs_stat_fd(dfd, filename, &stat);
+
+ if (!error)
+ error = cp_stat64(statbuf, &stat);
+
+out:
+ return error;
+}
+
/*
* Linux/i386 didn't use to be able to handle more than
* 4 system call parameters, so these system calls used a memory