From 22840dea11f020ba466a94352f644d4f75e0e1fd Mon Sep 17 00:00:00 2001
From: David van Moolenbroek <david@minix3.org>
Date: Sun, 21 Jun 2015 17:50:22 +0000
Subject: [PATCH] libfsdriver: preinitialize stat.st_ino

The stat.st_ino field must always be filled with the inode number
given as part of the fdr_stat request anyway, so libfsdriver can
simply fill in the number and allow the file system not to bother.

Change-Id: Ia7a849d0b23dfc83010df0d48fa26e4225427694
---
 lib/libpuffs/stadir.c         | 1 -
 minix/fs/ext2/stadir.c        | 2 --
 minix/fs/mfs/stadir.c         | 2 --
 minix/fs/pfs/pfs.c            | 1 -
 minix/lib/libfsdriver/call.c  | 1 +
 minix/lib/libsffs/stat.c      | 1 -
 minix/lib/libvtreefs/stadir.c | 1 -
 7 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/lib/libpuffs/stadir.c b/lib/libpuffs/stadir.c
index 6d1d14d07..c617bc4bf 100644
--- a/lib/libpuffs/stadir.c
+++ b/lib/libpuffs/stadir.c
@@ -45,7 +45,6 @@ int fs_stat(ino_t ino_nr, struct stat *statbuf)
   /* true iff special */
   s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
 
-  statbuf->st_ino = va.va_fileid;
   statbuf->st_mode = va.va_mode;
   statbuf->st_nlink = va.va_nlink;
   statbuf->st_uid = va.va_uid;
diff --git a/minix/fs/ext2/stadir.c b/minix/fs/ext2/stadir.c
index 720b7389e..8045a53f7 100644
--- a/minix/fs/ext2/stadir.c
+++ b/minix/fs/ext2/stadir.c
@@ -31,8 +31,6 @@ int fs_stat(ino_t ino_nr, struct stat *statbuf)
   /* true iff special */
   s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
 
-  statbuf->st_dev = rip->i_dev;
-  statbuf->st_ino = rip->i_num;
   statbuf->st_mode = rip->i_mode;
   statbuf->st_nlink = rip->i_links_count;
   statbuf->st_uid = rip->i_uid;
diff --git a/minix/fs/mfs/stadir.c b/minix/fs/mfs/stadir.c
index 91be2280a..2d161cdbd 100644
--- a/minix/fs/mfs/stadir.c
+++ b/minix/fs/mfs/stadir.c
@@ -59,8 +59,6 @@ int fs_stat(ino_t ino_nr, struct stat *statbuf)
   /* true iff special */
   s = (mo == I_CHAR_SPECIAL || mo == I_BLOCK_SPECIAL);
 
-  statbuf->st_dev = rip->i_dev;
-  statbuf->st_ino = (ino_t) rip->i_num;
   statbuf->st_mode = (mode_t) rip->i_mode;
   statbuf->st_nlink = (nlink_t) rip->i_nlinks;
   statbuf->st_uid = rip->i_uid;
diff --git a/minix/fs/pfs/pfs.c b/minix/fs/pfs/pfs.c
index f73adb6fd..050edd153 100644
--- a/minix/fs/pfs/pfs.c
+++ b/minix/fs/pfs/pfs.c
@@ -338,7 +338,6 @@ pfs_stat(ino_t ino_nr, struct stat * statbuf)
 
 	/* Fill the stat buffer. */
 	statbuf->st_dev = rip->i_rdev;	/* workaround for old socketpair bug */
-	statbuf->st_ino = rip->i_num;
 	statbuf->st_mode = rip->i_mode;
 	statbuf->st_nlink = 0;
 	statbuf->st_uid = rip->i_uid;
diff --git a/minix/lib/libfsdriver/call.c b/minix/lib/libfsdriver/call.c
index 1f6189da1..7b4367396 100644
--- a/minix/lib/libfsdriver/call.c
+++ b/minix/lib/libfsdriver/call.c
@@ -726,6 +726,7 @@ fsdriver_stat(const struct fsdriver * __restrict fdp,
 
 	memset(&buf, 0, sizeof(buf));
 	buf.st_dev = fsdriver_device;
+	buf.st_ino = ino_nr;
 
 	if ((r = fdp->fdr_stat(ino_nr, &buf)) == OK)
 		r = sys_safecopyto(m_in->m_source, grant, 0, (vir_bytes)&buf,
diff --git a/minix/lib/libsffs/stat.c b/minix/lib/libsffs/stat.c
index 330afbf08..1fce5675c 100644
--- a/minix/lib/libsffs/stat.c
+++ b/minix/lib/libsffs/stat.c
@@ -56,7 +56,6 @@ int do_stat(ino_t ino_nr, struct stat *stat)
   if ((r = verify_inode(ino, path, &attr)) != OK)
 	return r;
 
-  stat->st_ino = ino_nr;
   stat->st_mode = get_mode(ino, attr.a_mode);
   stat->st_uid = sffs_params->p_uid;
   stat->st_gid = sffs_params->p_gid;
diff --git a/minix/lib/libvtreefs/stadir.c b/minix/lib/libvtreefs/stadir.c
index 3f0d17df7..5a4a5e5c8 100644
--- a/minix/lib/libvtreefs/stadir.c
+++ b/minix/lib/libvtreefs/stadir.c
@@ -17,7 +17,6 @@ fs_stat(ino_t ino_nr, struct stat * buf)
 		return EINVAL;
 
 	/* Fill in the basic info. */
-	buf->st_ino = get_inode_number(node);
 	buf->st_mode = node->i_stat.mode;
 	buf->st_nlink = !is_inode_deleted(node);
 	buf->st_uid = node->i_stat.uid;