Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
KVM: MMU: Fix memory leak on guest demand faults
KVM: VMX: convert init_rmode_tss() to slots_lock
KVM: MMU: handle page removal with shadow mapping
KVM: MMU: Fix is_rmap_pte() with io ptes
KVM: VMX: Restore tss even on x86_64
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 2332188..f42be06 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -81,13 +81,10 @@
if (IS_ERR(anon_inode_inode))
return -ENODEV;
- file = get_empty_filp();
- if (!file)
- return -ENFILE;
error = get_unused_fd();
if (error < 0)
- goto err_put_filp;
+ return error;
fd = error;
/*
@@ -114,14 +111,15 @@
dentry->d_flags &= ~DCACHE_UNHASHED;
d_instantiate(dentry, anon_inode_inode);
- file->f_path.mnt = mntget(anon_inode_mnt);
- file->f_path.dentry = dentry;
+ error = -ENFILE;
+ file = alloc_file(anon_inode_mnt, dentry,
+ FMODE_READ | FMODE_WRITE, fops);
+ if (!file)
+ goto err_dput;
file->f_mapping = anon_inode_inode->i_mapping;
file->f_pos = 0;
file->f_flags = O_RDWR;
- file->f_op = fops;
- file->f_mode = FMODE_READ | FMODE_WRITE;
file->f_version = 0;
file->private_data = priv;
@@ -132,10 +130,10 @@
*pfile = file;
return 0;
+err_dput:
+ dput(dentry);
err_put_unused_fd:
put_unused_fd(fd);
-err_put_filp:
- put_filp(file);
return error;
}
EXPORT_SYMBOL_GPL(anon_inode_getfd);
diff --git a/fs/file_table.c b/fs/file_table.c
index 6d27bef..986ff4e 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -83,6 +83,12 @@
/* Find an unused file structure and return a pointer to it.
* Returns NULL, if there are no more free file structures or
* we run out of memory.
+ *
+ * Be very careful using this. You are responsible for
+ * getting write access to any mount that you might assign
+ * to this filp, if it is opened for write. If this is not
+ * done, you will imbalance int the mount's writer count
+ * and a warning at __fput() time.
*/
struct file *get_empty_filp(void)
{
diff --git a/fs/hppfs/hppfs_kern.c b/fs/hppfs/hppfs_kern.c
index a1e1f0f..8601d8e 100644
--- a/fs/hppfs/hppfs_kern.c
+++ b/fs/hppfs/hppfs_kern.c
@@ -1,23 +1,24 @@
/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/dcache.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
#include <linux/statfs.h>
+#include <linux/types.h>
#include <asm/uaccess.h>
-#include <asm/fcntl.h>
#include "os.h"
-static int init_inode(struct inode *inode, struct dentry *dentry);
+static struct inode *get_inode(struct super_block *, struct dentry *);
struct hppfs_data {
struct list_head list;
@@ -51,14 +52,14 @@
int i;
sb = dentry->d_sb;
- if((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
- return(0);
+ if ((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
+ return 0;
- for(i = 0; i < dentry->d_name.len; i++){
- if(!isdigit(dentry->d_name.name[i]))
- return(0);
+ for (i = 0; i < dentry->d_name.len; i++) {
+ if (!isdigit(dentry->d_name.name[i]))
+ return 0;
}
- return(1);
+ return 1;
}
static char *dentry_name(struct dentry *dentry, int extra)
@@ -70,8 +71,8 @@
len = 0;
parent = dentry;
- while(parent->d_parent != parent){
- if(is_pid(parent))
+ while (parent->d_parent != parent) {
+ if (is_pid(parent))
len += strlen("pid") + 1;
else len += parent->d_name.len + 1;
parent = parent->d_parent;
@@ -80,12 +81,13 @@
root = "proc";
len += strlen(root);
name = kmalloc(len + extra + 1, GFP_KERNEL);
- if(name == NULL) return(NULL);
+ if (name == NULL)
+ return NULL;
name[len] = '\0';
parent = dentry;
- while(parent->d_parent != parent){
- if(is_pid(parent)){
+ while (parent->d_parent != parent) {
+ if (is_pid(parent)) {
seg_name = "pid";
seg_len = strlen("pid");
}
@@ -100,27 +102,25 @@
parent = parent->d_parent;
}
strncpy(name, root, strlen(root));
- return(name);
+ return name;
}
-struct dentry_operations hppfs_dentry_ops = {
-};
-
static int file_removed(struct dentry *dentry, const char *file)
{
char *host_file;
int extra, fd;
extra = 0;
- if(file != NULL) extra += strlen(file) + 1;
+ if (file != NULL)
+ extra += strlen(file) + 1;
host_file = dentry_name(dentry, extra + strlen("/remove"));
- if(host_file == NULL){
- printk("file_removed : allocation failed\n");
- return(-ENOMEM);
+ if (host_file == NULL) {
+ printk(KERN_ERR "file_removed : allocation failed\n");
+ return -ENOMEM;
}
- if(file != NULL){
+ if (file != NULL) {
strcat(host_file, "/");
strcat(host_file, file);
}
@@ -128,45 +128,11 @@
fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
kfree(host_file);
- if(fd > 0){
+ if (fd > 0) {
os_close_file(fd);
- return(1);
+ return 1;
}
- return(0);
-}
-
-static void hppfs_read_inode(struct inode *ino)
-{
- struct inode *proc_ino;
-
- if(HPPFS_I(ino)->proc_dentry == NULL)
- return;
-
- proc_ino = HPPFS_I(ino)->proc_dentry->d_inode;
- ino->i_uid = proc_ino->i_uid;
- ino->i_gid = proc_ino->i_gid;
- ino->i_atime = proc_ino->i_atime;
- ino->i_mtime = proc_ino->i_mtime;
- ino->i_ctime = proc_ino->i_ctime;
- ino->i_ino = proc_ino->i_ino;
- ino->i_mode = proc_ino->i_mode;
- ino->i_nlink = proc_ino->i_nlink;
- ino->i_size = proc_ino->i_size;
- ino->i_blocks = proc_ino->i_blocks;
-}
-
-static struct inode *hppfs_iget(struct super_block *sb)
-{
- struct inode *inode;
-
- inode = iget_locked(sb, 0);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (inode->i_state & I_NEW) {
- hppfs_read_inode(inode);
- unlock_new_inode(inode);
- }
- return inode;
+ return 0;
}
static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
@@ -177,55 +143,45 @@
int err, deleted;
deleted = file_removed(dentry, NULL);
- if(deleted < 0)
- return(ERR_PTR(deleted));
- else if(deleted)
- return(ERR_PTR(-ENOENT));
+ if (deleted < 0)
+ return ERR_PTR(deleted);
+ else if (deleted)
+ return ERR_PTR(-ENOENT);
err = -ENOMEM;
parent = HPPFS_I(ino)->proc_dentry;
mutex_lock(&parent->d_inode->i_mutex);
proc_dentry = d_lookup(parent, &dentry->d_name);
- if(proc_dentry == NULL){
+ if (proc_dentry == NULL) {
proc_dentry = d_alloc(parent, &dentry->d_name);
- if(proc_dentry == NULL){
+ if (proc_dentry == NULL) {
mutex_unlock(&parent->d_inode->i_mutex);
goto out;
}
new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
proc_dentry, NULL);
- if(new){
+ if (new) {
dput(proc_dentry);
proc_dentry = new;
}
}
mutex_unlock(&parent->d_inode->i_mutex);
- if(IS_ERR(proc_dentry))
- return(proc_dentry);
+ if (IS_ERR(proc_dentry))
+ return proc_dentry;
- inode = hppfs_iget(ino->i_sb);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
+ err = -ENOMEM;
+ inode = get_inode(ino->i_sb, proc_dentry);
+ if (!inode)
goto out_dput;
- }
-
- err = init_inode(inode, proc_dentry);
- if(err)
- goto out_put;
-
- hppfs_read_inode(inode);
d_add(dentry, inode);
- dentry->d_op = &hppfs_dentry_ops;
- return(NULL);
+ return NULL;
- out_put:
- iput(inode);
out_dput:
dput(proc_dentry);
out:
- return(ERR_PTR(err));
+ return ERR_PTR(err);
}
static const struct inode_operations hppfs_file_iops = {
@@ -239,15 +195,16 @@
read = file->f_path.dentry->d_inode->i_fop->read;
- if(!is_user)
+ if (!is_user)
set_fs(KERNEL_DS);
n = (*read)(file, buf, count, &file->f_pos);
- if(!is_user)
+ if (!is_user)
set_fs(USER_DS);
- if(ppos) *ppos = file->f_pos;
+ if (ppos)
+ *ppos = file->f_pos;
return n;
}
@@ -259,24 +216,23 @@
n = -ENOMEM;
new_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if(new_buf == NULL){
- printk("hppfs_read_file : kmalloc failed\n");
+ if (new_buf == NULL) {
+ printk(KERN_ERR "hppfs_read_file : kmalloc failed\n");
goto out;
}
n = 0;
- while(count > 0){
+ while (count > 0) {
cur = min_t(ssize_t, count, PAGE_SIZE);
err = os_read_file(fd, new_buf, cur);
- if(err < 0){
- printk("hppfs_read : read failed, errno = %d\n",
- err);
+ if (err < 0) {
+ printk(KERN_ERR "hppfs_read : read failed, "
+ "errno = %d\n", err);
n = err;
goto out_free;
- }
- else if(err == 0)
+ } else if (err == 0)
break;
- if(copy_to_user(buf, new_buf, err)){
+ if (copy_to_user(buf, new_buf, err)) {
n = -EFAULT;
goto out_free;
}
@@ -297,35 +253,36 @@
loff_t off;
int err;
- if(hppfs->contents != NULL){
- if(*ppos >= hppfs->len) return(0);
+ if (hppfs->contents != NULL) {
+ if (*ppos >= hppfs->len)
+ return 0;
data = hppfs->contents;
off = *ppos;
- while(off >= sizeof(data->contents)){
+ while (off >= sizeof(data->contents)) {
data = list_entry(data->list.next, struct hppfs_data,
list);
off -= sizeof(data->contents);
}
- if(off + count > hppfs->len)
+ if (off + count > hppfs->len)
count = hppfs->len - off;
copy_to_user(buf, &data->contents[off], count);
*ppos += count;
- }
- else if(hppfs->host_fd != -1){
+ } else if (hppfs->host_fd != -1) {
err = os_seek_file(hppfs->host_fd, *ppos);
- if(err){
- printk("hppfs_read : seek failed, errno = %d\n", err);
- return(err);
+ if (err) {
+ printk(KERN_ERR "hppfs_read : seek failed, "
+ "errno = %d\n", err);
+ return err;
}
count = hppfs_read_file(hppfs->host_fd, buf, count);
- if(count > 0)
+ if (count > 0)
*ppos += count;
}
else count = read_proc(hppfs->proc_file, buf, count, ppos, 1);
- return(count);
+ return count;
}
static ssize_t hppfs_write(struct file *file, const char __user *buf, size_t len,
@@ -342,7 +299,7 @@
err = (*write)(proc_file, buf, len, &proc_file->f_pos);
file->f_pos = proc_file->f_pos;
- return(err);
+ return err;
}
static int open_host_sock(char *host_file, int *filter_out)
@@ -354,13 +311,13 @@
strcpy(end, "/rw");
*filter_out = 1;
fd = os_connect_socket(host_file);
- if(fd > 0)
- return(fd);
+ if (fd > 0)
+ return fd;
strcpy(end, "/r");
*filter_out = 0;
fd = os_connect_socket(host_file);
- return(fd);
+ return fd;
}
static void free_contents(struct hppfs_data *head)
@@ -368,9 +325,10 @@
struct hppfs_data *data;
struct list_head *ele, *next;
- if(head == NULL) return;
+ if (head == NULL)
+ return;
- list_for_each_safe(ele, next, &head->list){
+ list_for_each_safe(ele, next, &head->list) {
data = list_entry(ele, struct hppfs_data, list);
kfree(data);
}
@@ -387,8 +345,8 @@
err = -ENOMEM;
data = kmalloc(sizeof(*data), GFP_KERNEL);
- if(data == NULL){
- printk("hppfs_get_data : head allocation failed\n");
+ if (data == NULL) {
+ printk(KERN_ERR "hppfs_get_data : head allocation failed\n");
goto failed;
}
@@ -397,36 +355,36 @@
head = data;
*size_out = 0;
- if(filter){
- while((n = read_proc(proc_file, data->contents,
+ if (filter) {
+ while ((n = read_proc(proc_file, data->contents,
sizeof(data->contents), NULL, 0)) > 0)
os_write_file(fd, data->contents, n);
err = os_shutdown_socket(fd, 0, 1);
- if(err){
- printk("hppfs_get_data : failed to shut down "
+ if (err) {
+ printk(KERN_ERR "hppfs_get_data : failed to shut down "
"socket\n");
goto failed_free;
}
}
- while(1){
+ while (1) {
n = os_read_file(fd, data->contents, sizeof(data->contents));
- if(n < 0){
+ if (n < 0) {
err = n;
- printk("hppfs_get_data : read failed, errno = %d\n",
- err);
+ printk(KERN_ERR "hppfs_get_data : read failed, "
+ "errno = %d\n", err);
goto failed_free;
- }
- else if(n == 0)
+ } else if (n == 0)
break;
*size_out += n;
- if(n < sizeof(data->contents))
+ if (n < sizeof(data->contents))
break;
new = kmalloc(sizeof(*data), GFP_KERNEL);
- if(new == 0){
- printk("hppfs_get_data : data allocation failed\n");
+ if (new == 0) {
+ printk(KERN_ERR "hppfs_get_data : data allocation "
+ "failed\n");
err = -ENOMEM;
goto failed_free;
}
@@ -435,12 +393,12 @@
list_add(&new->list, &data->list);
data = new;
}
- return(head);
+ return head;
failed_free:
free_contents(head);
failed:
- return(ERR_PTR(err));
+ return ERR_PTR(err);
}
static struct hppfs_private *hppfs_data(void)
@@ -448,77 +406,79 @@
struct hppfs_private *data;
data = kmalloc(sizeof(*data), GFP_KERNEL);
- if(data == NULL)
- return(data);
+ if (data == NULL)
+ return data;
*data = ((struct hppfs_private ) { .host_fd = -1,
.len = -1,
.contents = NULL } );
- return(data);
+ return data;
}
static int file_mode(int fmode)
{
- if(fmode == (FMODE_READ | FMODE_WRITE))
- return(O_RDWR);
- if(fmode == FMODE_READ)
- return(O_RDONLY);
- if(fmode == FMODE_WRITE)
- return(O_WRONLY);
- return(0);
+ if (fmode == (FMODE_READ | FMODE_WRITE))
+ return O_RDWR;
+ if (fmode == FMODE_READ)
+ return O_RDONLY;
+ if (fmode == FMODE_WRITE)
+ return O_WRONLY;
+ return 0;
}
static int hppfs_open(struct inode *inode, struct file *file)
{
struct hppfs_private *data;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
char *host_file;
int err, fd, type, filter;
err = -ENOMEM;
data = hppfs_data();
- if(data == NULL)
+ if (data == NULL)
goto out;
host_file = dentry_name(file->f_path.dentry, strlen("/rw"));
- if(host_file == NULL)
+ if (host_file == NULL)
goto out_free2;
proc_dentry = HPPFS_I(inode)->proc_dentry;
+ proc_mnt = inode->i_sb->s_fs_info;
/* XXX This isn't closed anywhere */
- data->proc_file = dentry_open(dget(proc_dentry), NULL,
+ data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
file_mode(file->f_mode));
err = PTR_ERR(data->proc_file);
- if(IS_ERR(data->proc_file))
+ if (IS_ERR(data->proc_file))
goto out_free1;
type = os_file_type(host_file);
- if(type == OS_TYPE_FILE){
+ if (type == OS_TYPE_FILE) {
fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
- if(fd >= 0)
+ if (fd >= 0)
data->host_fd = fd;
- else printk("hppfs_open : failed to open '%s', errno = %d\n",
- host_file, -fd);
+ else
+ printk(KERN_ERR "hppfs_open : failed to open '%s', "
+ "errno = %d\n", host_file, -fd);
data->contents = NULL;
- }
- else if(type == OS_TYPE_DIR){
+ } else if (type == OS_TYPE_DIR) {
fd = open_host_sock(host_file, &filter);
- if(fd > 0){
+ if (fd > 0) {
data->contents = hppfs_get_data(fd, filter,
data->proc_file,
file, &data->len);
- if(!IS_ERR(data->contents))
+ if (!IS_ERR(data->contents))
data->host_fd = fd;
- }
- else printk("hppfs_open : failed to open a socket in "
- "'%s', errno = %d\n", host_file, -fd);
+ } else
+ printk(KERN_ERR "hppfs_open : failed to open a socket "
+ "in '%s', errno = %d\n", host_file, -fd);
}
kfree(host_file);
file->private_data = data;
- return(0);
+ return 0;
out_free1:
kfree(host_file);
@@ -526,34 +486,36 @@
free_contents(data->contents);
kfree(data);
out:
- return(err);
+ return err;
}
static int hppfs_dir_open(struct inode *inode, struct file *file)
{
struct hppfs_private *data;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
int err;
err = -ENOMEM;
data = hppfs_data();
- if(data == NULL)
+ if (data == NULL)
goto out;
proc_dentry = HPPFS_I(inode)->proc_dentry;
- data->proc_file = dentry_open(dget(proc_dentry), NULL,
+ proc_mnt = inode->i_sb->s_fs_info;
+ data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
file_mode(file->f_mode));
err = PTR_ERR(data->proc_file);
- if(IS_ERR(data->proc_file))
+ if (IS_ERR(data->proc_file))
goto out_free;
file->private_data = data;
- return(0);
+ return 0;
out_free:
kfree(data);
out:
- return(err);
+ return err;
}
static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
@@ -564,13 +526,13 @@
loff_t ret;
llseek = proc_file->f_path.dentry->d_inode->i_fop->llseek;
- if(llseek != NULL){
+ if (llseek != NULL) {
ret = (*llseek)(proc_file, off, where);
- if(ret < 0)
- return(ret);
+ if (ret < 0)
+ return ret;
}
- return(default_llseek(file, off, where));
+ return default_llseek(file, off, where);
}
static const struct file_operations hppfs_file_fops = {
@@ -592,11 +554,11 @@
{
struct hppfs_dirent *dirent = d;
- if(file_removed(dirent->dentry, name))
- return(0);
+ if (file_removed(dirent->dentry, name))
+ return 0;
- return((*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
- inode, type));
+ return (*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
+ inode, type);
}
static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
@@ -607,7 +569,8 @@
struct hppfs_dirent dirent = ((struct hppfs_dirent)
{ .vfs_dirent = ent,
.filldir = filldir,
- .dentry = file->f_path.dentry } );
+ .dentry = file->f_path.dentry
+ });
int err;
readdir = proc_file->f_path.dentry->d_inode->i_fop->readdir;
@@ -616,12 +579,12 @@
err = (*readdir)(proc_file, &dirent, hppfs_filldir);
file->f_pos = proc_file->f_pos;
- return(err);
+ return err;
}
static int hppfs_fsync(struct file *file, struct dentry *dentry, int datasync)
{
- return(0);
+ return 0;
}
static const struct file_operations hppfs_dir_fops = {
@@ -639,7 +602,7 @@
sf->f_files = 0;
sf->f_ffree = 0;
sf->f_type = HPPFS_SUPER_MAGIC;
- return(0);
+ return 0;
}
static struct inode *hppfs_alloc_inode(struct super_block *sb)
@@ -647,12 +610,12 @@
struct hppfs_inode_info *hi;
hi = kmalloc(sizeof(*hi), GFP_KERNEL);
- if(hi == NULL)
- return(NULL);
+ if (!hi)
+ return NULL;
- *hi = ((struct hppfs_inode_info) { .proc_dentry = NULL });
+ hi->proc_dentry = NULL;
inode_init_once(&hi->vfs_inode);
- return(&hi->vfs_inode);
+ return &hi->vfs_inode;
}
void hppfs_delete_inode(struct inode *ino)
@@ -665,21 +628,31 @@
kfree(HPPFS_I(inode));
}
+static void hppfs_put_super(struct super_block *sb)
+{
+ mntput(sb->s_fs_info);
+}
+
static const struct super_operations hppfs_sbops = {
.alloc_inode = hppfs_alloc_inode,
.destroy_inode = hppfs_destroy_inode,
.delete_inode = hppfs_delete_inode,
.statfs = hppfs_statfs,
+ .put_super = hppfs_put_super,
};
-static int hppfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
+static int hppfs_readlink(struct dentry *dentry, char __user *buffer,
+ int buflen)
{
struct file *proc_file;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
int ret;
proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
- proc_file = dentry_open(dget(proc_dentry), NULL, O_RDONLY);
+ proc_mnt = dentry->d_sb->s_fs_info;
+
+ proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt), O_RDONLY);
if (IS_ERR(proc_file))
return PTR_ERR(proc_file);
@@ -694,10 +667,13 @@
{
struct file *proc_file;
struct dentry *proc_dentry;
+ struct vfsmount *proc_mnt;
void *ret;
proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
- proc_file = dentry_open(dget(proc_dentry), NULL, O_RDONLY);
+ proc_mnt = dentry->d_sb->s_fs_info;
+
+ proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt), O_RDONLY);
if (IS_ERR(proc_file))
return proc_file;
@@ -717,70 +693,72 @@
.follow_link = hppfs_follow_link,
};
-static int init_inode(struct inode *inode, struct dentry *dentry)
+static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
{
- if(S_ISDIR(dentry->d_inode->i_mode)){
+ struct inode *proc_ino = dentry->d_inode;
+ struct inode *inode = new_inode(sb);
+
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ if (S_ISDIR(dentry->d_inode->i_mode)) {
inode->i_op = &hppfs_dir_iops;
inode->i_fop = &hppfs_dir_fops;
- }
- else if(S_ISLNK(dentry->d_inode->i_mode)){
+ } else if (S_ISLNK(dentry->d_inode->i_mode)) {
inode->i_op = &hppfs_link_iops;
inode->i_fop = &hppfs_file_fops;
- }
- else {
+ } else {
inode->i_op = &hppfs_file_iops;
inode->i_fop = &hppfs_file_fops;
}
HPPFS_I(inode)->proc_dentry = dentry;
- return(0);
+ inode->i_uid = proc_ino->i_uid;
+ inode->i_gid = proc_ino->i_gid;
+ inode->i_atime = proc_ino->i_atime;
+ inode->i_mtime = proc_ino->i_mtime;
+ inode->i_ctime = proc_ino->i_ctime;
+ inode->i_ino = proc_ino->i_ino;
+ inode->i_mode = proc_ino->i_mode;
+ inode->i_nlink = proc_ino->i_nlink;
+ inode->i_size = proc_ino->i_size;
+ inode->i_blocks = proc_ino->i_blocks;
+
+ return 0;
}
static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
{
struct inode *root_inode;
- struct file_system_type *procfs;
- struct super_block *proc_sb;
- int err;
+ struct vfsmount *proc_mnt;
+ int err = -ENOENT;
- err = -ENOENT;
- procfs = get_fs_type("proc");
- if(procfs == NULL)
+ proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
+ if (IS_ERR(proc_mnt))
goto out;
- if(list_empty(&procfs->fs_supers))
- goto out;
-
- proc_sb = list_entry(procfs->fs_supers.next, struct super_block,
- s_instances);
-
sb->s_blocksize = 1024;
sb->s_blocksize_bits = 10;
sb->s_magic = HPPFS_SUPER_MAGIC;
sb->s_op = &hppfs_sbops;
-
- root_inode = hppfs_iget(sb);
- if (IS_ERR(root_inode)) {
- err = PTR_ERR(root_inode);
- goto out;
- }
-
- err = init_inode(root_inode, proc_sb->s_root);
- if(err)
- goto out_put;
+ sb->s_fs_info = proc_mnt;
err = -ENOMEM;
+ root_inode = get_inode(sb, proc_mnt->mnt_sb->s_root);
+ if (!root_inode)
+ goto out_mntput;
+
sb->s_root = d_alloc_root(root_inode);
- if(sb->s_root == NULL)
- goto out_put;
+ if (!sb->s_root)
+ goto out_iput;
- hppfs_read_inode(root_inode);
+ return 0;
- return(0);
-
- out_put:
+ out_iput:
iput(root_inode);
+ out_mntput:
+ mntput(proc_mnt);
out:
return(err);
}
@@ -802,7 +780,7 @@
static int __init init_hppfs(void)
{
- return(register_filesystem(&hppfs_type));
+ return register_filesystem(&hppfs_type);
}
static void __exit exit_hppfs(void)
@@ -813,14 +791,3 @@
module_init(init_hppfs)
module_exit(exit_hppfs)
MODULE_LICENSE("GPL");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index eee9487..6846785 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -954,7 +954,7 @@
FMODE_WRITE | FMODE_READ,
&hugetlbfs_file_operations);
if (!file)
- goto out_inode;
+ goto out_dentry; /* inode is already attached */
return file;
diff --git a/fs/namei.c b/fs/namei.c
index 6b7a0ee..8cf9bb9c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -106,7 +106,7 @@
* any extra contention...
*/
-static int link_path_walk(const char *name, struct nameidata *nd);
+static int __link_path_walk(const char *name, struct nameidata *nd);
/* In order to reduce some races, while at the same time doing additional
* checking and hopefully speeding things up, we copy filenames to the
@@ -563,6 +563,37 @@
return 1;
}
+/*
+ * Wrapper to retry pathname resolution whenever the underlying
+ * file system returns an ESTALE.
+ *
+ * Retry the whole path once, forcing real lookup requests
+ * instead of relying on the dcache.
+ */
+static __always_inline int link_path_walk(const char *name, struct nameidata *nd)
+{
+ struct path save = nd->path;
+ int result;
+
+ /* make sure the stuff we saved doesn't go away */
+ dget(save.dentry);
+ mntget(save.mnt);
+
+ result = __link_path_walk(name, nd);
+ if (result == -ESTALE) {
+ /* nd->path had been dropped */
+ nd->path = save;
+ dget(nd->path.dentry);
+ mntget(nd->path.mnt);
+ nd->flags |= LOOKUP_REVAL;
+ result = __link_path_walk(name, nd);
+ }
+
+ path_put(&save);
+
+ return result;
+}
+
static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *link)
{
int res = 0;
@@ -1020,36 +1051,6 @@
return err;
}
-/*
- * Wrapper to retry pathname resolution whenever the underlying
- * file system returns an ESTALE.
- *
- * Retry the whole path once, forcing real lookup requests
- * instead of relying on the dcache.
- */
-static int link_path_walk(const char *name, struct nameidata *nd)
-{
- struct nameidata save = *nd;
- int result;
-
- /* make sure the stuff we saved doesn't go away */
- dget(save.path.dentry);
- mntget(save.path.mnt);
-
- result = __link_path_walk(name, nd);
- if (result == -ESTALE) {
- *nd = save;
- dget(nd->path.dentry);
- mntget(nd->path.mnt);
- nd->flags |= LOOKUP_REVAL;
- result = __link_path_walk(name, nd);
- }
-
- path_put(&save.path);
-
- return result;
-}
-
static int path_walk(const char *name, struct nameidata *nd)
{
current->total_link_count = 0;
diff --git a/fs/open.c b/fs/open.c
index 5419853..a4b1202 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -903,6 +903,18 @@
int error;
struct file *f;
+ /*
+ * We must always pass in a valid mount pointer. Historically
+ * callers got away with not passing it, but we must enforce this at
+ * the earliest possible point now to avoid strange problems deep in the
+ * filesystem stack.
+ */
+ if (!mnt) {
+ printk(KERN_WARNING "%s called with NULL vfsmount\n", __func__);
+ dump_stack();
+ return ERR_PTR(-EINVAL);
+ }
+
error = -ENFILE;
f = get_empty_filp();
if (f == NULL) {
diff --git a/fs/pipe.c b/fs/pipe.c
index 3c185b6..8be381b 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -957,13 +957,10 @@
struct dentry *dentry;
struct qstr name = { .name = "" };
- f = get_empty_filp();
- if (!f)
- return ERR_PTR(-ENFILE);
err = -ENFILE;
inode = get_pipe_inode();
if (!inode)
- goto err_file;
+ goto err;
err = -ENOMEM;
dentry = d_alloc(pipe_mnt->mnt_sb->s_root, &name);
@@ -978,22 +975,24 @@
*/
dentry->d_flags &= ~DCACHE_UNHASHED;
d_instantiate(dentry, inode);
- f->f_path.mnt = mntget(pipe_mnt);
- f->f_path.dentry = dentry;
+
+ err = -ENFILE;
+ f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipe_fops);
+ if (!f)
+ goto err_dentry;
f->f_mapping = inode->i_mapping;
f->f_flags = O_WRONLY;
- f->f_op = &write_pipe_fops;
- f->f_mode = FMODE_WRITE;
f->f_version = 0;
return f;
+ err_dentry:
+ dput(dentry);
err_inode:
free_pipe_info(inode);
iput(inode);
- err_file:
- put_filp(f);
+ err:
return ERR_PTR(err);
}
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index eba037b..344b9b9 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -191,28 +191,11 @@
dput(xadir);
if (err)
xafile = ERR_PTR(err);
- return xafile;
-}
-
-/* Opens a file pointer to the attribute associated with inode */
-static struct file *open_xa_file(const struct inode *inode, const char *name,
- int flags)
-{
- struct dentry *xafile;
- struct file *fp;
-
- xafile = get_xa_file_dentry(inode, name, flags);
- if (IS_ERR(xafile))
- return ERR_PTR(PTR_ERR(xafile));
else if (!xafile->d_inode) {
dput(xafile);
- return ERR_PTR(-ENODATA);
+ xafile = ERR_PTR(-ENODATA);
}
-
- fp = dentry_open(xafile, NULL, O_RDWR);
- /* dentry_open dputs the dentry if it fails */
-
- return fp;
+ return xafile;
}
/*
@@ -228,9 +211,8 @@
* we're called with i_mutex held, so there are no worries about the directory
* changing underneath us.
*/
-static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
+static int __xattr_readdir(struct inode *inode, void *dirent, filldir_t filldir)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
struct cpu_key pos_key; /* key of current position in the directory (key of directory entry) */
INITIALIZE_PATH(path_to_entry);
struct buffer_head *bh;
@@ -374,23 +356,16 @@
*
*/
static
-int xattr_readdir(struct file *file, filldir_t filler, void *buf)
+int xattr_readdir(struct inode *inode, filldir_t filler, void *buf)
{
- struct inode *inode = file->f_path.dentry->d_inode;
- int res = -ENOTDIR;
- if (!file->f_op || !file->f_op->readdir)
- goto out;
+ int res = -ENOENT;
mutex_lock_nested(&inode->i_mutex, I_MUTEX_XATTR);
-// down(&inode->i_zombie);
- res = -ENOENT;
if (!IS_DEADDIR(inode)) {
lock_kernel();
- res = __xattr_readdir(file, buf, filler);
+ res = __xattr_readdir(inode, buf, filler);
unlock_kernel();
}
-// up(&inode->i_zombie);
mutex_unlock(&inode->i_mutex);
- out:
return res;
}
@@ -442,7 +417,7 @@
size_t buffer_size, int flags)
{
int err = 0;
- struct file *fp;
+ struct dentry *dentry;
struct page *page;
char *data;
struct address_space *mapping;
@@ -460,18 +435,18 @@
xahash = xattr_hash(buffer, buffer_size);
open_file:
- fp = open_xa_file(inode, name, flags);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
+ dentry = get_xa_file_dentry(inode, name, flags);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
goto out;
}
- xinode = fp->f_path.dentry->d_inode;
+ xinode = dentry->d_inode;
REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
/* we need to copy it off.. */
if (xinode->i_nlink > 1) {
- fput(fp);
+ dput(dentry);
err = reiserfs_xattr_del(inode, name);
if (err < 0)
goto out;
@@ -485,7 +460,7 @@
newattrs.ia_size = buffer_size;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
mutex_lock_nested(&xinode->i_mutex, I_MUTEX_XATTR);
- err = notify_change(fp->f_path.dentry, &newattrs);
+ err = notify_change(dentry, &newattrs);
if (err)
goto out_filp;
@@ -518,15 +493,14 @@
rxh->h_hash = cpu_to_le32(xahash);
}
- err = reiserfs_prepare_write(fp, page, page_offset,
+ err = reiserfs_prepare_write(NULL, page, page_offset,
page_offset + chunk + skip);
if (!err) {
if (buffer)
memcpy(data + skip, buffer + buffer_pos, chunk);
- err =
- reiserfs_commit_write(fp, page, page_offset,
- page_offset + chunk +
- skip);
+ err = reiserfs_commit_write(NULL, page, page_offset,
+ page_offset + chunk +
+ skip);
}
unlock_page(page);
reiserfs_put_page(page);
@@ -548,7 +522,7 @@
out_filp:
mutex_unlock(&xinode->i_mutex);
- fput(fp);
+ dput(dentry);
out:
return err;
@@ -562,7 +536,7 @@
size_t buffer_size)
{
ssize_t err = 0;
- struct file *fp;
+ struct dentry *dentry;
size_t isize;
size_t file_pos = 0;
size_t buffer_pos = 0;
@@ -578,13 +552,13 @@
if (get_inode_sd_version(inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
- fp = open_xa_file(inode, name, FL_READONLY);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
+ dentry = get_xa_file_dentry(inode, name, FL_READONLY);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
goto out;
}
- xinode = fp->f_path.dentry->d_inode;
+ xinode = dentry->d_inode;
isize = xinode->i_size;
REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
@@ -652,7 +626,7 @@
}
out_dput:
- fput(fp);
+ dput(dentry);
out:
return err;
@@ -742,7 +716,6 @@
/* This is called w/ inode->i_mutex downed */
int reiserfs_delete_xattrs(struct inode *inode)
{
- struct file *fp;
struct dentry *dir, *root;
int err = 0;
@@ -763,15 +736,8 @@
return 0;
}
- fp = dentry_open(dir, NULL, O_RDWR);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
- /* dentry_open dputs the dentry if it fails */
- goto out;
- }
-
lock_kernel();
- err = xattr_readdir(fp, reiserfs_delete_xattrs_filler, dir);
+ err = xattr_readdir(dir->d_inode, reiserfs_delete_xattrs_filler, dir);
if (err) {
unlock_kernel();
goto out_dir;
@@ -791,7 +757,7 @@
unlock_kernel();
out_dir:
- fput(fp);
+ dput(dir);
out:
if (!err)
@@ -833,7 +799,6 @@
int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
{
- struct file *fp;
struct dentry *dir;
int err = 0;
struct reiserfs_chown_buf buf;
@@ -857,13 +822,6 @@
goto out;
}
- fp = dentry_open(dir, NULL, O_RDWR);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
- /* dentry_open dputs the dentry if it fails */
- goto out;
- }
-
lock_kernel();
attrs->ia_valid &= (ATTR_UID | ATTR_GID | ATTR_CTIME);
@@ -871,7 +829,7 @@
buf.attrs = attrs;
buf.inode = inode;
- err = xattr_readdir(fp, reiserfs_chown_xattrs_filler, &buf);
+ err = xattr_readdir(dir->d_inode, reiserfs_chown_xattrs_filler, &buf);
if (err) {
unlock_kernel();
goto out_dir;
@@ -881,7 +839,7 @@
unlock_kernel();
out_dir:
- fput(fp);
+ dput(dir);
out:
attrs->ia_valid = ia_valid;
@@ -1029,7 +987,6 @@
*/
ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
{
- struct file *fp;
struct dentry *dir;
int err = 0;
struct reiserfs_listxattr_buf buf;
@@ -1052,13 +1009,6 @@
goto out;
}
- fp = dentry_open(dir, NULL, O_RDWR);
- if (IS_ERR(fp)) {
- err = PTR_ERR(fp);
- /* dentry_open dputs the dentry if it fails */
- goto out;
- }
-
buf.r_buf = buffer;
buf.r_size = buffer ? size : 0;
buf.r_pos = 0;
@@ -1066,7 +1016,7 @@
REISERFS_I(dentry->d_inode)->i_flags |= i_has_xattr_dir;
- err = xattr_readdir(fp, reiserfs_listxattr_filler, &buf);
+ err = xattr_readdir(dir->d_inode, reiserfs_listxattr_filler, &buf);
if (err)
goto out_dir;
@@ -1076,7 +1026,7 @@
err = buf.r_pos;
out_dir:
- fput(fp);
+ dput(dir);
out:
reiserfs_read_unlock_xattr_i(dentry->d_inode);
diff --git a/fs/super.c b/fs/super.c
index d0a941a..09008dbd 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -945,6 +945,7 @@
put_filesystem(type);
return mnt;
}
+EXPORT_SYMBOL_GPL(do_kern_mount);
struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
{
diff --git a/mm/tiny-shmem.c b/mm/tiny-shmem.c
index f0f5587..ae532f5 100644
--- a/mm/tiny-shmem.c
+++ b/mm/tiny-shmem.c
@@ -88,6 +88,8 @@
close_file:
put_filp(file);
+ return ERR_PTR(error);
+
put_dentry:
dput(dentry);
put_memory:
