mm: compaction: determine if dirty pages can be migrated without blocking within...

[linux-2.6-block.git] / fs / hugetlbfs / inode.c

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 0be5a78598d02a71f627ac0acb0ec83365b41845..06fd4608a990d15a3135156455a9ea0f349583da 100644 (file)
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -447,8 +447,8 @@ static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr)
        return 0;
 }
 
-static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid, 
-                                       gid_t gid, int mode, dev_t dev)
+static struct inode *hugetlbfs_get_root(struct super_block *sb,
+                                       struct hugetlbfs_config *config)
 {
        struct inode *inode;
 
@@ -456,9 +456,31 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid,
        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;
+               inode->i_mode = S_IFDIR | config->mode;
+               inode->i_uid = config->uid;
+               inode->i_gid = config->gid;
+               inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+               info = HUGETLBFS_I(inode);
+               mpol_shared_policy_init(&info->policy, NULL);
+               inode->i_op = &hugetlbfs_dir_inode_operations;
+               inode->i_fop = &simple_dir_operations;
+               /* directory inodes start off with i_nlink == 2 (for "." entry) */
+               inc_nlink(inode);
+       }
+       return inode;
+}
+
+static struct inode *hugetlbfs_get_inode(struct super_block *sb,
+                                       struct inode *dir,
+                                       umode_t mode, dev_t dev)
+{
+       struct inode *inode;
+
+       inode = new_inode(sb);
+       if (inode) {
+               struct hugetlbfs_inode_info *info;
+               inode->i_ino = get_next_ino();
+               inode_init_owner(inode, dir, mode);
                inode->i_mapping->a_ops = &hugetlbfs_aops;
                inode->i_mapping->backing_dev_info =&hugetlbfs_backing_dev_info;
                inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
@@ -500,20 +522,12 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb, uid_t uid,
  * File creation. Allocate an inode, and we're done..
  */
 static int hugetlbfs_mknod(struct inode *dir,
-                       struct dentry *dentry, int mode, dev_t dev)
+                       struct dentry *dentry, umode_t mode, dev_t dev)
 {
        struct inode *inode;
        int error = -ENOSPC;
-       gid_t gid;
-
-       if (dir->i_mode & S_ISGID) {
-               gid = dir->i_gid;
-               if (S_ISDIR(mode))
-                       mode |= S_ISGID;
-       } else {
-               gid = current_fsgid();
-       }
-       inode = hugetlbfs_get_inode(dir->i_sb, current_fsuid(), gid, mode, dev);
+
+       inode = hugetlbfs_get_inode(dir->i_sb, dir, mode, dev);
        if (inode) {
                dir->i_ctime = dir->i_mtime = CURRENT_TIME;
                d_instantiate(dentry, inode);
@@ -523,7 +537,7 @@ static int hugetlbfs_mknod(struct inode *dir,
        return error;
 }
 
-static int hugetlbfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int hugetlbfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
        int retval = hugetlbfs_mknod(dir, dentry, mode | S_IFDIR, 0);
        if (!retval)
@@ -531,7 +545,7 @@ static int hugetlbfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
        return retval;
 }
 
-static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
+static int hugetlbfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, struct nameidata *nd)
 {
        return hugetlbfs_mknod(dir, dentry, mode | S_IFREG, 0);
 }
@@ -541,15 +555,8 @@ static int hugetlbfs_symlink(struct inode *dir,
 {
        struct inode *inode;
        int error = -ENOSPC;
-       gid_t gid;
-
-       if (dir->i_mode & S_ISGID)
-               gid = dir->i_gid;
-       else
-               gid = current_fsgid();
 
-       inode = hugetlbfs_get_inode(dir->i_sb, current_fsuid(),
-                                       gid, S_IFLNK|S_IRWXUGO, 0);
+       inode = hugetlbfs_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0);
        if (inode) {
                int l = strlen(symname)+1;
                error = page_symlink(inode, symname, l);
@@ -576,7 +583,8 @@ static int hugetlbfs_set_page_dirty(struct page *page)
 }
 
 static int hugetlbfs_migrate_page(struct address_space *mapping,
-                               struct page *newpage, struct page *page)
+                               struct page *newpage, struct page *page,
+                               bool sync)
 {
        int rc;
 
@@ -666,7 +674,6 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
 static void hugetlbfs_i_callback(struct rcu_head *head)
 {
        struct inode *inode = container_of(head, struct inode, i_rcu);
-       INIT_LIST_HEAD(&inode->i_dentry);
        kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
 }
 
@@ -858,8 +865,7 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_magic = HUGETLBFS_MAGIC;
        sb->s_op = &hugetlbfs_ops;
        sb->s_time_gran = 1;
-       inode = hugetlbfs_get_inode(sb, config.uid, config.gid,
-                                       S_IFDIR | config.mode, 0);
+       inode = hugetlbfs_get_root(sb, &config);
        if (!inode)
                goto out_free;
 
@@ -957,8 +963,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
 
        path.mnt = mntget(hugetlbfs_vfsmount);
        error = -ENOSPC;
-       inode = hugetlbfs_get_inode(root->d_sb, current_fsuid(),
-                               current_fsgid(), S_IFREG | S_IRWXUGO, 0);
+       inode = hugetlbfs_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0);
        if (!inode)
                goto out_dentry;