From b7549061f900c9f79bd35559de7cd66645b80109 Mon Sep 17 00:00:00 2001
From: wangdi <wangdi>
Date: Fri, 9 Jan 2004 16:19:28 +0000
Subject: [PATCH] add loop_device_get_info.patch in snapfs series
---
.../patches/loop_device_get_info.patch | 57 +++++++++++++++++++
lustre/kernel_patches/series/snapfs-2.4.20 | 1 +
2 files changed, 58 insertions(+)
create mode 100644 lustre/kernel_patches/patches/loop_device_get_info.patch
diff --git a/lustre/kernel_patches/patches/loop_device_get_info.patch b/lustre/kernel_patches/patches/loop_device_get_info.patch
new file mode 100644
index 0000000000..d45d64b402
--- /dev/null
+++ b/lustre/kernel_patches/patches/loop_device_get_info.patch
@@ -0,0 +1,57 @@
+Index: linux-2.4.20-8/drivers/block/loop.c
+===================================================================
+--- linux-2.4.20-8.orig/drivers/block/loop.c 2002-11-29 07:53:12.000000000 +0800
++++ linux-2.4.20-8/drivers/block/loop.c 2004-01-10 00:02:33.000000000 +0800
+@@ -843,6 +843,31 @@
+ }
+ return copy_to_user(arg, &info, sizeof(info)) ? -EFAULT : 0;
+ }
++static int loop_get_info(struct loop_device *lo, struct loop_info *arg)
++{
++ struct loop_info info;
++ struct file *file = lo->lo_backing_file;
++
++ if (lo->lo_state != Lo_bound)
++ return -ENXIO;
++ if (!arg)
++ return -EINVAL;
++ memset(&info, 0, sizeof(info));
++ info.lo_number = lo->lo_number;
++ info.lo_device = kdev_t_to_nr(file->f_dentry->d_inode->i_dev);
++ info.lo_inode = file->f_dentry->d_inode->i_ino;
++ info.lo_rdevice = kdev_t_to_nr(lo->lo_device);
++ info.lo_offset = lo->lo_offset;
++ info.lo_flags = lo->lo_flags;
++ strncpy(info.lo_name, lo->lo_name, LO_NAME_SIZE);
++ info.lo_encrypt_type = lo->lo_encrypt_type;
++ if (lo->lo_encrypt_key_size && capable(CAP_SYS_ADMIN)) {
++ info.lo_encrypt_key_size = lo->lo_encrypt_key_size;
++ memcpy(info.lo_encrypt_key, lo->lo_encrypt_key,
++ lo->lo_encrypt_key_size);
++ }
++ return memcpy(arg, &info, sizeof(info)) ? -EFAULT : 0;
++}
+
+ static int lo_ioctl(struct inode * inode, struct file * file,
+ unsigned int cmd, unsigned long arg)
+@@ -875,6 +900,9 @@
+ case LOOP_GET_STATUS:
+ err = loop_get_status(lo, (struct loop_info *) arg);
+ break;
++ case LOOP_GET_INFO:
++ err = loop_get_info(lo, (struct loop_info *) arg);
++ break;
+ case BLKGETSIZE:
+ if (lo->lo_state != Lo_bound) {
+ err = -ENXIO;
+Index: linux-2.4.20-8/include/linux/loop.h
+===================================================================
+--- linux-2.4.20-8.orig/include/linux/loop.h 2001-09-18 04:16:30.000000000 +0800
++++ linux-2.4.20-8/include/linux/loop.h 2004-01-09 23:50:17.000000000 +0800
+@@ -151,5 +151,6 @@
+ #define LOOP_CLR_FD 0x4C01
+ #define LOOP_SET_STATUS 0x4C02
+ #define LOOP_GET_STATUS 0x4C03
++#define LOOP_GET_INFO 0x4C04
+
+ #endif
diff --git a/lustre/kernel_patches/series/snapfs-2.4.20 b/lustre/kernel_patches/series/snapfs-2.4.20
index f448349d00..76d6c11ec1 100644
--- a/lustre/kernel_patches/series/snapfs-2.4.20
+++ b/lustre/kernel_patches/series/snapfs-2.4.20
@@ -49,4 +49,5 @@ ext3-trusted_ea-2.4.20.patch
kernel_text_address-2.4.20-vanilla.patch
ext3-xattr-ptr-arith-fix.patch
gfp_memalloc-2.4.22.patch
+loop_device_get_info.patch
snapfs_core-2.4.20.patch
--
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