[XFS] Don't grow filesystems past the size they can index.

[safe/jmp/linux-2.6] / fs / proc / inode.c

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 722b9c4..d5ce65c 100644 (file)
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -21,7 +21,7 @@
 
 #include "internal.h"
 
-static inline struct proc_dir_entry * de_get(struct proc_dir_entry *de)
+struct proc_dir_entry *de_get(struct proc_dir_entry *de)
 {
        if (de)
                atomic_inc(&de->count);
@@ -31,7 +31,7 @@ static inline struct proc_dir_entry * de_get(struct proc_dir_entry *de)
 /*
  * Decrements the use count and checks for deferred deletion.
  */
-static void de_put(struct proc_dir_entry *de)
+void de_put(struct proc_dir_entry *de)
 {
        if (de) {       
                lock_kernel();          
@@ -58,14 +58,11 @@ static void de_put(struct proc_dir_entry *de)
 static void proc_delete_inode(struct inode *inode)
 {
        struct proc_dir_entry *de;
-       struct task_struct *tsk;
 
        truncate_inode_pages(&inode->i_data, 0);
 
-       /* Let go of any associated process */
-       tsk = PROC_I(inode)->task;
-       if (tsk)
-               put_task_struct(tsk);
+       /* Stop tracking associated processes */
+       put_pid(PROC_I(inode)->pid);
 
        /* Let go of any associated proc directory entry */
        de = PROC_I(inode)->pde;
@@ -84,18 +81,18 @@ static void proc_read_inode(struct inode * inode)
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 }
 
-static kmem_cache_t * proc_inode_cachep;
+static struct kmem_cache * proc_inode_cachep;
 
 static struct inode *proc_alloc_inode(struct super_block *sb)
 {
        struct proc_inode *ei;
        struct inode *inode;
 
-       ei = (struct proc_inode *)kmem_cache_alloc(proc_inode_cachep, SLAB_KERNEL);
+       ei = (struct proc_inode *)kmem_cache_alloc(proc_inode_cachep, GFP_KERNEL);
        if (!ei)
                return NULL;
-       ei->task = NULL;
-       ei->type = 0;
+       ei->pid = NULL;
+       ei->fd = 0;
        ei->op.proc_get_link = NULL;
        ei->pde = NULL;
        inode = &ei->vfs_inode;
@@ -108,13 +105,11 @@ static void proc_destroy_inode(struct inode *inode)
        kmem_cache_free(proc_inode_cachep, PROC_I(inode));
 }
 
-static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
 {
        struct proc_inode *ei = (struct proc_inode *) foo;
 
-       if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
-           SLAB_CTOR_CONSTRUCTOR)
-               inode_init_once(&ei->vfs_inode);
+       inode_init_once(&ei->vfs_inode);
 }
  
 int __init proc_init_inodecache(void)
@@ -135,7 +130,7 @@ static int proc_remount(struct super_block *sb, int *flags, char *data)
        return 0;
 }
 
-static struct super_operations proc_sops = { 
+static const struct super_operations proc_sops = {
        .alloc_inode    = proc_alloc_inode,
        .destroy_inode  = proc_destroy_inode,
        .read_inode     = proc_read_inode,
@@ -150,13 +145,6 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
 {
        struct inode * inode;
 
-       /*
-        * Increment the use count so the dir entry can't disappear.
-        */
-       de_get(de);
-
-       WARN_ON(de && de->deleted);
-
        if (de != NULL && !try_module_get(de->owner))
                goto out_mod;
 
@@ -164,6 +152,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
        if (!inode)
                goto out_ino;
 
+       PROC_I(inode)->fd = 0;
        PROC_I(inode)->pde = de;
        if (de) {
                if (de->mode) {
@@ -187,7 +176,6 @@ out_ino:
        if (de != NULL)
                module_put(de->owner);
 out_mod:
-       de_put(de);
        return NULL;
 }                      
 
@@ -195,13 +183,14 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
 {
        struct inode * root_inode;
 
-       s->s_flags |= MS_NODIRATIME;
+       s->s_flags |= MS_NODIRATIME | MS_NOSUID | MS_NOEXEC;
        s->s_blocksize = 1024;
        s->s_blocksize_bits = 10;
        s->s_magic = PROC_SUPER_MAGIC;
        s->s_op = &proc_sops;
        s->s_time_gran = 1;
        
+       de_get(&proc_root);
        root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
        if (!root_inode)
                goto out_no_root;
@@ -215,6 +204,7 @@ int proc_fill_super(struct super_block *s, void *data, int silent)
 out_no_root:
        printk("proc_read_super: get root inode failed\n");
        iput(root_inode);
+       de_put(&proc_root);
        return -ENOMEM;
 }
 MODULE_LICENSE("GPL");