afs: use non-racy method for proc entries creation

Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data
be setup before gluing PDE to main tree.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 846c761..9f7d1ae 100644 (file)
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -41,6 +41,7 @@ static const struct file_operations afs_proc_cells_fops = {
        .write          = afs_proc_cells_write,
        .llseek         = seq_lseek,
        .release        = seq_release,
+       .owner          = THIS_MODULE,
 };
 
 static int afs_proc_rootcell_open(struct inode *inode, struct file *file);
@@ -56,7 +57,8 @@ static const struct file_operations afs_proc_rootcell_fops = {
        .read           = afs_proc_rootcell_read,
        .write          = afs_proc_rootcell_write,
        .llseek         = no_llseek,
-       .release        = afs_proc_rootcell_release
+       .release        = afs_proc_rootcell_release,
+       .owner          = THIS_MODULE,
 };
 
 static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file);
@@ -80,6 +82,7 @@ static const struct file_operations afs_proc_cell_volumes_fops = {
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = afs_proc_cell_volumes_release,
+       .owner          = THIS_MODULE,
 };
 
 static int afs_proc_cell_vlservers_open(struct inode *inode,
@@ -104,6 +107,7 @@ static const struct file_operations afs_proc_cell_vlservers_fops = {
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = afs_proc_cell_vlservers_release,
+       .owner          = THIS_MODULE,
 };
 
 static int afs_proc_cell_servers_open(struct inode *inode, struct file *file);
@@ -127,6 +131,7 @@ static const struct file_operations afs_proc_cell_servers_fops = {
        .read           = seq_read,
        .llseek         = seq_lseek,
        .release        = afs_proc_cell_servers_release,
+       .owner          = THIS_MODULE,
 };
 
 /*
@@ -143,17 +148,13 @@ int afs_proc_init(void)
                goto error_dir;
        proc_afs->owner = THIS_MODULE;
 
-       p = create_proc_entry("cells", 0, proc_afs);
+       p = proc_create("cells", 0, proc_afs, &afs_proc_cells_fops);
        if (!p)
                goto error_cells;
-       p->proc_fops = &afs_proc_cells_fops;
-       p->owner = THIS_MODULE;
 
-       p = create_proc_entry("rootcell", 0, proc_afs);
+       p = proc_create("rootcell", 0, proc_afs, &afs_proc_rootcell_fops);
        if (!p)
                goto error_rootcell;
-       p->proc_fops = &afs_proc_rootcell_fops;
-       p->owner = THIS_MODULE;
 
        _leave(" = 0");
        return 0;
@@ -395,26 +396,20 @@ int afs_proc_cell_setup(struct afs_cell *cell)
        if (!cell->proc_dir)
                goto error_dir;
 
-       p = create_proc_entry("servers", 0, cell->proc_dir);
+       p = proc_create_data("servers", 0, cell->proc_dir,
+                            &afs_proc_cell_servers_fops, cell);
        if (!p)
                goto error_servers;
-       p->proc_fops = &afs_proc_cell_servers_fops;
-       p->owner = THIS_MODULE;
-       p->data = cell;
 
-       p = create_proc_entry("vlservers", 0, cell->proc_dir);
+       p = proc_create_data("vlservers", 0, cell->proc_dir,
+                            &afs_proc_cell_vlservers_fops, cell);
        if (!p)
                goto error_vlservers;
-       p->proc_fops = &afs_proc_cell_vlservers_fops;
-       p->owner = THIS_MODULE;
-       p->data = cell;
 
-       p = create_proc_entry("volumes", 0, cell->proc_dir);
+       p = proc_create_data("volumes", 0, cell->proc_dir,
+                            &afs_proc_cell_volumes_fops, cell);
        if (!p)
                goto error_volumes;
-       p->proc_fops = &afs_proc_cell_volumes_fops;
-       p->owner = THIS_MODULE;
-       p->data = cell;
 
        _leave(" = 0");
        return 0;