fs: do not assign default i_ino in new_inode

Instead of always assigning an increasing inode number in new_inode
move the call to assign it into those callers that actually need it.
For now callers that need it is estimated conservatively, that is
the call is added to all filesystems that do not assign an i_ino
by themselves.  For a few more filesystems we can avoid assigning
any inode number given that they aren't user visible, and for others
it could be done lazily when an inode number is actually needed,
but that's left for later patches.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

31 files changed, 36 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
index d13e726..12d5bf7 100644
--- a/drivers/infiniband/hw/ipath/ipath_fs.c
+++ b/drivers/infiniband/hw/ipath/ipath_fs.c
@@ -57,6 +57,7 @@ static int ipathfs_mknod(struct inode *dir, struct dentry *dentry,
 		goto bail;
 	}
 
+	inode->i_ino = get_next_ino();
 	inode->i_mode = mode;
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	inode->i_private = data;
diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c
index a0e6613..7e433d7 100644
--- a/drivers/infiniband/hw/qib/qib_fs.c
+++ b/drivers/infiniband/hw/qib/qib_fs.c
@@ -58,6 +58,7 @@ static int qibfs_mknod(struct inode *dir, struct dentry *dentry,
 		goto bail;
 	}
 
+	inode->i_ino = get_next_ino();
 	inode->i_mode = mode;
 	inode->i_uid = 0;
 	inode->i_gid = 0;
diff --git a/drivers/misc/ibmasm/ibmasmfs.c b/drivers/misc/ibmasm/ibmasmfs.c
index af2497a..0a53500 100644
--- a/drivers/misc/ibmasm/ibmasmfs.c
+++ b/drivers/misc/ibmasm/ibmasmfs.c
@@ -146,6 +146,7 @@ static struct inode *ibmasmfs_make_inode(struct super_block *sb, int mode)
 	struct inode *ret = new_inode(sb);
 
 	if (ret) {
+		ret->i_ino = get_next_ino();
 		ret->i_mode = mode;
 		ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
 	}
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
index 95f711b..449de59 100644
--- a/drivers/oprofile/oprofilefs.c
+++ b/drivers/oprofile/oprofilefs.c
@@ -28,6 +28,7 @@ static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode)
 	struct inode *inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	}
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 095fa53..e2f63c0 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -276,6 +276,7 @@ static struct inode *usbfs_get_inode (struct super_block *sb, int mode, dev_t de
 	struct inode *inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_uid = current_fsuid();
 		inode->i_gid = current_fsgid();
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index e4f5950..e093fd8 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -980,6 +980,7 @@ ffs_sb_make_inode(struct super_block *sb, void *data,
 	if (likely(inode)) {
 		struct timespec current_time = CURRENT_TIME;
 
+		inode->i_ino	 = usbfs_get_inode();
 		inode->i_mode    = perms->mode;
 		inode->i_uid     = perms->uid;
 		inode->i_gid     = perms->gid;
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index d1d72d9..ba145e7 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1991,6 +1991,7 @@ gadgetfs_make_inode (struct super_block *sb,
 	struct inode *inode = new_inode (sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_uid = default_uid;
 		inode->i_gid = default_gid;
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 9c8e87b..5365527 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -193,6 +193,7 @@ static struct inode *anon_inode_mkinode(void)
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
 
+	inode->i_ino = get_next_ino();
 	inode->i_fop = &anon_inode_fops;
 
 	inode->i_mapping->a_ops = &anon_aops;
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 821b2b9..ac87e49 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -398,6 +398,7 @@ struct inode *autofs4_get_inode(struct super_block *sb,
 		inode->i_gid = sb->s_root->d_inode->i_gid;
 	}
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	inode->i_ino = get_next_ino();
 
 	if (S_ISDIR(inf->mode)) {
 		inode->i_nlink = 2;
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 139fc80..29990f0 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -495,6 +495,7 @@ static struct inode *bm_get_inode(struct super_block *sb, int mode)
 	struct inode * inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_atime = inode->i_mtime = inode->i_ctime =
 			current_fs_time(inode->i_sb);
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index cf78d44..253476d 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -135,6 +135,7 @@ struct inode * configfs_new_inode(mode_t mode, struct configfs_dirent * sd)
 {
 	struct inode * inode = new_inode(configfs_sb);
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mapping->a_ops = &configfs_aops;
 		inode->i_mapping->backing_dev_info = &configfs_backing_dev_info;
 		inode->i_op = &configfs_inode_operations;
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 30a87b3..a4ed838 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -40,6 +40,7 @@ static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t d
 	struct inode *inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		switch (mode & S_IFMT) {
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 19aa0d4..42f77b1 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2373,6 +2373,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
 		printk(KERN_ERR "EXT4-fs: can't get new inode\n");
 		goto err_freesgi;
 	}
+	sbi->s_buddy_cache->i_ino = get_next_ino();
 	EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
 	for (i = 0; i < ngroups; i++) {
 		desc = ext4_get_group_desc(sb, i, NULL);
diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c
index 79d1b4e..8c04eac 100644
--- a/fs/freevxfs/vxfs_inode.c
+++ b/fs/freevxfs/vxfs_inode.c
@@ -260,6 +260,7 @@ vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip)
 	struct inode			*ip = NULL;
 
 	if ((ip = new_inode(sbp))) {
+		ip->i_ino = get_next_ino();
 		vxfs_iinit(ip, vip);
 		ip->i_mapping->a_ops = &vxfs_aops;
 	}
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 7367e17..4eba076 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -222,6 +222,7 @@ static struct dentry *fuse_ctl_add_dentry(struct dentry *parent,
 	if (!inode)
 		return NULL;
 
+	inode->i_ino = get_next_ino();
 	inode->i_mode = mode;
 	inode->i_uid = fc->user_id;
 	inode->i_gid = fc->group_id;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 113eba3..8d0607b 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -455,6 +455,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid,
 	inode = new_inode(sb);
 	if (inode) {
 		struct hugetlbfs_inode_info *info;
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_uid = uid;
 		inode->i_gid = gid;
diff --git a/fs/inode.c b/fs/inode.c
index 46a3e12..2cd2e48 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -735,7 +735,7 @@ repeat:
 #define LAST_INO_BATCH 1024
 static DEFINE_PER_CPU(unsigned int, last_ino);
 
-static unsigned int get_next_ino(void)
+unsigned int get_next_ino(void)
 {
 	unsigned int *p = &get_cpu_var(last_ino);
 	unsigned int res = *p;
@@ -753,6 +753,7 @@ static unsigned int get_next_ino(void)
 	put_cpu_var(last_ino);
 	return res;
 }
+EXPORT_SYMBOL(get_next_ino);
 
 /**
  *	new_inode 	- obtain an inode
@@ -776,7 +777,6 @@ struct inode *new_inode(struct super_block *sb)
 	if (inode) {
 		spin_lock(&inode_lock);
 		__inode_sb_list_add(inode);
-		inode->i_ino = get_next_ino();
 		inode->i_state = 0;
 		spin_unlock(&inode_lock);
 	}
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index a7ebd9d..75e115f 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -400,6 +400,7 @@ static struct inode *dlmfs_get_root_inode(struct super_block *sb)
 	if (inode) {
 		ip = DLMFS_I(inode);
 
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_uid = current_fsuid();
 		inode->i_gid = current_fsgid();
@@ -425,6 +426,7 @@ static struct inode *dlmfs_get_inode(struct inode *parent,
 	if (!inode)
 		return NULL;
 
+	inode->i_ino = get_next_ino();
 	inode->i_mode = mode;
 	inode->i_uid = current_fsuid();
 	inode->i_gid = current_fsgid();
diff --git a/fs/pipe.c b/fs/pipe.c
index 37eb1eb..d2d7566 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -954,6 +954,8 @@ static struct inode * get_pipe_inode(void)
 	if (!inode)
 		goto fail_inode;
 
+	inode->i_ino = get_next_ino();
+
 	pipe = alloc_pipe_info(inode);
 	if (!pipe)
 		goto fail_iput;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index fb2a5ab..9883f1e 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1603,6 +1603,7 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st
 
 	/* Common stuff */
 	ei = PROC_I(inode);
+	inode->i_ino = get_next_ino();
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	inode->i_op = &proc_def_inode_operations;
 
@@ -2549,6 +2550,7 @@ static struct dentry *proc_base_instantiate(struct inode *dir,
 
 	/* Initialize the inode */
 	ei = PROC_I(inode);
+	inode->i_ino = get_next_ino();
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 
 	/*
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 2fc5255..b652cb0 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -23,6 +23,8 @@ static struct inode *proc_sys_make_inode(struct super_block *sb,
 	if (!inode)
 		goto out;
 
+	inode->i_ino = get_next_ino();
+
 	sysctl_head_get(head);
 	ei = PROC_I(inode);
 	ei->sysctl = head;
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index a5ebae7..67fadb1 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -58,6 +58,7 @@ struct inode *ramfs_get_inode(struct super_block *sb,
 	struct inode * inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode_init_owner(inode, dir, mode);
 		inode->i_mapping->a_ops = &ramfs_aops;
 		inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info;
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index ba53128..63fd2c0 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1580,6 +1580,7 @@ xfs_mapping_buftarg(
 			XFS_BUFTARG_NAME(btp));
 		return ENOMEM;
 	}
+	inode->i_ino = get_next_ino();
 	inode->i_mode = S_IFBLK;
 	inode->i_bdev = bdev;
 	inode->i_rdev = bdev->bd_dev;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index bd6ae6c..4a573cf 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2191,6 +2191,7 @@ extern struct inode * iget_locked(struct super_block *, unsigned long);
 extern int insert_inode_locked4(struct inode *, unsigned long, int (*test)(struct inode *, void *), void *);
 extern int insert_inode_locked(struct inode *);
 extern void unlock_new_inode(struct inode *);
+extern unsigned int get_next_ino(void);
 
 extern void __iget(struct inode * inode);
 extern void iget_failed(struct inode *);
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 80b35ff..3a61ffe 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -116,6 +116,7 @@ static struct inode *mqueue_get_inode(struct super_block *sb,
 
 	inode = new_inode(sb);
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_uid = current_fsuid();
 		inode->i_gid = current_fsgid();
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 7b69b8d..9270d53 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -777,6 +777,7 @@ static struct inode *cgroup_new_inode(mode_t mode, struct super_block *sb)
 	struct inode *inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_uid = current_fsuid();
 		inode->i_gid = current_fsgid();
diff --git a/mm/shmem.c b/mm/shmem.c
index d4e2852..f6d350e 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1586,6 +1586,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode
 
 	inode = new_inode(sb);
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode_init_owner(inode, dir, mode);
 		inode->i_blocks = 0;
 		inode->i_mapping->backing_dev_info = &shmem_backing_dev_info;
diff --git a/net/socket.c b/net/socket.c
index d223725..5cac1c7 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -480,6 +480,7 @@ static struct socket *sock_alloc(void)
 	sock = SOCKET_I(inode);
 
 	kmemcheck_annotate_bitfield(sock, type);
+	inode->i_ino = get_next_ino();
 	inode->i_mode = S_IFSOCK | S_IRWXUGO;
 	inode->i_uid = current_fsuid();
 	inode->i_gid = current_fsgid();
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 52f2524..7df92d2 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -445,6 +445,7 @@ rpc_get_inode(struct super_block *sb, umode_t mode)
 	struct inode *inode = new_inode(sb);
 	if (!inode)
 		return NULL;
+	inode->i_ino = get_next_ino();
 	inode->i_mode = mode;
 	inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	switch(mode & S_IFMT) {
diff --git a/security/inode.c b/security/inode.c
index 8883986..cb8f47c 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -61,6 +61,7 @@ static struct inode *get_inode(struct super_block *sb, int mode, dev_t dev)
 	struct inode *inode = new_inode(sb);
 
 	if (inode) {
+		inode->i_ino = get_next_ino();
 		inode->i_mode = mode;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		switch (mode & S_IFMT) {
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 87e0556..55a755c 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -978,6 +978,7 @@ static struct inode *sel_make_inode(struct super_block *sb, int mode)
 	struct inode *ret = new_inode(sb);
 
 	if (ret) {
+		ret->i_ino = get_next_ino();
 		ret->i_mode = mode;
 		ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME;
 	}