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configfs: make configfs_create() return inode 

Get rid of the callback, deal with that and dentry in callers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Al Viro 2019-09-11 08:57:38 +02:00 committed by Christoph Hellwig
parent 1cf7a003b0
commit 2743c515a1
3 changed files with 39 additions and 59 deletions
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2
fs/configfs/configfs_internal.h
View File

@ -66,7 +66,7 @@ extern struct kmem_cache *configfs_dir_cachep;
extern int configfs_is_root(struct config_item *item);
extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *);
extern int configfs_create(struct dentry *, umode_t mode, void (*init)(struct inode *));
extern struct inode *configfs_create(struct dentry *, umode_t mode);
extern int configfs_create_file(struct config_item *, const struct configfs_attribute *);
extern int configfs_create_bin_file(struct config_item *,

72
fs/configfs/dir.c
View File

@ -265,32 +265,6 @@ static void configfs_remove_dirent(struct dentry *dentry)
configfs_put(sd);
}
static void init_dir(struct inode * inode)
{
inode->i_op = &configfs_dir_inode_operations;
inode->i_fop = &configfs_dir_operations;
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
}
static void configfs_init_file(struct inode * inode)
{
inode->i_size = PAGE_SIZE;
inode->i_fop = &configfs_file_operations;
}
static void configfs_init_bin_file(struct inode *inode)
{
inode->i_size = 0;
inode->i_fop = &configfs_bin_file_operations;
}
static void init_symlink(struct inode * inode)
{
inode->i_op = &configfs_symlink_inode_operations;
}
/**
* configfs_create_dir - create a directory for an config_item.
* @item: config_itemwe're creating directory for.
@ -306,6 +280,7 @@ static int configfs_create_dir(struct config_item *item, struct dentry *dentry,
int error;
umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
struct dentry *p = dentry->d_parent;
struct inode *inode;
BUG_ON(!item);
@ -320,17 +295,24 @@ static int configfs_create_dir(struct config_item *item, struct dentry *dentry,
return error;
configfs_set_dir_dirent_depth(p->d_fsdata, dentry->d_fsdata);
error = configfs_create(dentry, mode, init_dir);
if (error)
inode = configfs_create(dentry, mode);
if (IS_ERR(inode))
goto out_remove;
inode->i_op = &configfs_dir_inode_operations;
inode->i_fop = &configfs_dir_operations;
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
d_instantiate(dentry, inode);
/* already hashed */
dget(dentry); /* pin directory dentries in core */
inc_nlink(d_inode(p));
item->ci_dentry = dentry;
return 0;
out_remove:
configfs_remove_dirent(dentry);
return error;
return PTR_ERR(inode);
}
/*
@ -378,20 +360,25 @@ int configfs_create_link(struct configfs_symlink *sl,
int err = 0;
umode_t mode = S_IFLNK | S_IRWXUGO;
struct configfs_dirent *p = parent->d_fsdata;
struct inode *inode;
err = configfs_make_dirent(p, dentry, sl, mode,
CONFIGFS_ITEM_LINK, p->s_frag);
if (err)
return err;
err = configfs_create(dentry, mode, init_symlink);
if (err)
inode = configfs_create(dentry, mode);
if (IS_ERR(inode))
goto out_remove;
inode->i_op = &configfs_symlink_inode_operations;
d_instantiate(dentry, inode);
dget(dentry); /* pin link dentries in core */
return 0;
out_remove:
configfs_remove_dirent(dentry);
return err;
return PTR_ERR(inode);
}
static void remove_dir(struct dentry * d)
@ -440,20 +427,27 @@ static void configfs_remove_dir(struct config_item * item)
static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * dentry)
{
struct configfs_attribute * attr = sd->s_element;
int error;
struct inode *inode;
spin_lock(&configfs_dirent_lock);
dentry->d_fsdata = configfs_get(sd);
sd->s_dentry = dentry;
spin_unlock(&configfs_dirent_lock);
error = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG,
(sd->s_type & CONFIGFS_ITEM_BIN_ATTR) ?
configfs_init_bin_file :
configfs_init_file);
if (error)
inode = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG);
if (IS_ERR(inode)) {
configfs_put(sd);
return error;
return PTR_ERR(inode);
}
if (sd->s_type & CONFIGFS_ITEM_BIN_ATTR) {
inode->i_size = 0;
inode->i_fop = &configfs_bin_file_operations;
} else {
inode->i_size = PAGE_SIZE;
inode->i_fop = &configfs_file_operations;
}
d_add(dentry, inode);
return 0;
}
static struct dentry * configfs_lookup(struct inode *dir,

24
fs/configfs/inode.c
View File

@ -164,41 +164,27 @@ static void configfs_set_inode_lock_class(struct configfs_dirent *sd,
#endif /* CONFIG_LOCKDEP */
int configfs_create(struct dentry * dentry, umode_t mode, void (*init)(struct inode *))
struct inode *configfs_create(struct dentry *dentry, umode_t mode)
{
int error = 0;
struct inode *inode = NULL;
struct configfs_dirent *sd;
struct inode *p_inode;
if (!dentry)
return -ENOENT;
return ERR_PTR(-ENOENT);
if (d_really_is_positive(dentry))
return -EEXIST;
return ERR_PTR(-EEXIST);
sd = dentry->d_fsdata;
inode = configfs_new_inode(mode, sd, dentry->d_sb);
if (!inode)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
p_inode = d_inode(dentry->d_parent);
p_inode->i_mtime = p_inode->i_ctime = current_time(p_inode);
configfs_set_inode_lock_class(sd, inode);
init(inode);
if (S_ISDIR(mode) || S_ISLNK(mode)) {
/*
* ->symlink(), ->mkdir(), configfs_register_subsystem() or
* create_default_group() - already hashed.
*/
d_instantiate(dentry, inode);
dget(dentry); /* pin link and directory dentries in core */
} else {
/* ->lookup() */
d_add(dentry, inode);
}
return error;
return inode;
}
/*