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-rw-r--r--fs/compat.c36
-rw-r--r--fs/read_write.c50
2 files changed, 86 insertions, 0 deletions
diff --git a/fs/compat.c b/fs/compat.c
index e04b4660db8..7c1615183d1 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1232,6 +1232,24 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
return ret;
}
+asmlinkage ssize_t
+compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
+ unsigned long vlen, u32 pos_high, u32 pos_low)
+{
+ loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+ struct file *file;
+ ssize_t ret;
+
+ if (pos < 0)
+ return -EINVAL;
+ file = fget(fd);
+ if (!file)
+ return -EBADF;
+ ret = compat_readv(file, vec, vlen, &pos);
+ fput(file);
+ return ret;
+}
+
static size_t compat_writev(struct file *file,
const struct compat_iovec __user *vec,
unsigned long vlen, loff_t *pos)
@@ -1269,6 +1287,24 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
return ret;
}
+asmlinkage ssize_t
+compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
+ unsigned long vlen, u32 pos_high, u32 pos_low)
+{
+ loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+ struct file *file;
+ ssize_t ret;
+
+ if (pos < 0)
+ return -EINVAL;
+ file = fget(fd);
+ if (!file)
+ return -EBADF;
+ ret = compat_writev(file, vec, vlen, &pos);
+ fput(file);
+ return ret;
+}
+
asmlinkage long
compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
unsigned int nr_segs, unsigned int flags)
diff --git a/fs/read_write.c b/fs/read_write.c
index 400fe81c973..6d5d8ff238a 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -731,6 +731,56 @@ SYSCALL_DEFINE3(writev, unsigned long, fd, const struct iovec __user *, vec,
return ret;
}
+SYSCALL_DEFINE5(preadv, unsigned long, fd, const struct iovec __user *, vec,
+ unsigned long, vlen, u32, pos_high, u32, pos_low)
+{
+ loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+ struct file *file;
+ ssize_t ret = -EBADF;
+ int fput_needed;
+
+ if (pos < 0)
+ return -EINVAL;
+
+ file = fget_light(fd, &fput_needed);
+ if (file) {
+ ret = -ESPIPE;
+ if (file->f_mode & FMODE_PREAD)
+ ret = vfs_readv(file, vec, vlen, &pos);
+ fput_light(file, fput_needed);
+ }
+
+ if (ret > 0)
+ add_rchar(current, ret);
+ inc_syscr(current);
+ return ret;
+}
+
+SYSCALL_DEFINE5(pwritev, unsigned long, fd, const struct iovec __user *, vec,
+ unsigned long, vlen, u32, pos_high, u32, pos_low)
+{
+ loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+ struct file *file;
+ ssize_t ret = -EBADF;
+ int fput_needed;
+
+ if (pos < 0)
+ return -EINVAL;
+
+ file = fget_light(fd, &fput_needed);
+ if (file) {
+ ret = -ESPIPE;
+ if (file->f_mode & FMODE_PWRITE)
+ ret = vfs_writev(file, vec, vlen, &pos);
+ fput_light(file, fput_needed);
+ }
+
+ if (ret > 0)
+ add_wchar(current, ret);
+ inc_syscw(current);
+ return ret;
+}
+
static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
size_t count, loff_t max)
{