fs: pass on flags in compat_writev

[karo-tx-linux.git] / fs / stat.c

diff --git a/fs/stat.c b/fs/stat.c
index a257b872a53d1105a797c75b14f13c31a442a12b..c35610845ab19f8c17e4ef96e851cddc2205bba9 100644 (file)
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -15,6 +15,7 @@
 #include <linux/cred.h>
 #include <linux/syscalls.h>
 #include <linux/pagemap.h>
+#include <linux/compat.h>
 
 #include <linux/uaccess.h>
 #include <asm/unistd.h>
@@ -575,6 +576,91 @@ SYSCALL_DEFINE5(statx,
        return cp_statx(&stat, buffer);
 }
 
+#ifdef CONFIG_COMPAT
+static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
+{
+       struct compat_stat tmp;
+
+       if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev))
+               return -EOVERFLOW;
+
+       memset(&tmp, 0, sizeof(tmp));
+       tmp.st_dev = old_encode_dev(stat->dev);
+       tmp.st_ino = stat->ino;
+       if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
+               return -EOVERFLOW;
+       tmp.st_mode = stat->mode;
+       tmp.st_nlink = stat->nlink;
+       if (tmp.st_nlink != stat->nlink)
+               return -EOVERFLOW;
+       SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid));
+       SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid));
+       tmp.st_rdev = old_encode_dev(stat->rdev);
+       if ((u64) stat->size > MAX_NON_LFS)
+               return -EOVERFLOW;
+       tmp.st_size = stat->size;
+       tmp.st_atime = stat->atime.tv_sec;
+       tmp.st_atime_nsec = stat->atime.tv_nsec;
+       tmp.st_mtime = stat->mtime.tv_sec;
+       tmp.st_mtime_nsec = stat->mtime.tv_nsec;
+       tmp.st_ctime = stat->ctime.tv_sec;
+       tmp.st_ctime_nsec = stat->ctime.tv_nsec;
+       tmp.st_blocks = stat->blocks;
+       tmp.st_blksize = stat->blksize;
+       return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
+}
+
+COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename,
+                      struct compat_stat __user *, statbuf)
+{
+       struct kstat stat;
+       int error;
+
+       error = vfs_stat(filename, &stat);
+       if (error)
+               return error;
+       return cp_compat_stat(&stat, statbuf);
+}
+
+COMPAT_SYSCALL_DEFINE2(newlstat, const char __user *, filename,
+                      struct compat_stat __user *, statbuf)
+{
+       struct kstat stat;
+       int error;
+
+       error = vfs_lstat(filename, &stat);
+       if (error)
+               return error;
+       return cp_compat_stat(&stat, statbuf);
+}
+
+#ifndef __ARCH_WANT_STAT64
+COMPAT_SYSCALL_DEFINE4(newfstatat, unsigned int, dfd,
+                      const char __user *, filename,
+                      struct compat_stat __user *, statbuf, int, flag)
+{
+       struct kstat stat;
+       int error;
+
+       error = vfs_fstatat(dfd, filename, &stat, flag);
+       if (error)
+               return error;
+       return cp_compat_stat(&stat, statbuf);
+}
+#endif
+
+COMPAT_SYSCALL_DEFINE2(newfstat, unsigned int, fd,
+                      struct compat_stat __user *, statbuf)
+{
+       struct kstat stat;
+       int error = vfs_fstat(fd, &stat);
+
+       if (!error)
+               error = cp_compat_stat(&stat, statbuf);
+       return error;
+}
+#endif
+
 /* Caller is here responsible for sufficient locking (ie. inode->i_lock) */
 void __inode_add_bytes(struct inode *inode, loff_t bytes)
 {
@@ -586,6 +672,7 @@ void __inode_add_bytes(struct inode *inode, loff_t bytes)
                inode->i_bytes -= 512;
        }
 }
+EXPORT_SYMBOL(__inode_add_bytes);
 
 void inode_add_bytes(struct inode *inode, loff_t bytes)
 {