static irqreturn_t gpio_sysfs_irq(int irq, void *priv)
{
- struct sysfs_dirent *value_sd = priv;
+ struct kernfs_node *value_sd = priv;
sysfs_notify_dirent(value_sd);
return IRQ_HANDLED;
static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
unsigned long gpio_flags)
{
- struct sysfs_dirent *value_sd;
+ struct kernfs_node *value_sd;
unsigned long irq_flags;
int ret, irq, id;
sector_t blocks = mddev->resync_max_sectors;
struct file *file = mddev->bitmap_info.file;
int err;
- struct sysfs_dirent *bm = NULL;
+ struct kernfs_node *bm = NULL;
BUILD_BUG_ON(sizeof(bitmap_super_t) != 256);
wait_queue_head_t overflow_wait;
wait_queue_head_t behind_wait;
- struct sysfs_dirent *sysfs_can_clear;
+ struct kernfs_node *sysfs_can_clear;
};
/* the bitmap API */
*/
struct work_struct del_work; /* used for delayed sysfs removal */
- struct sysfs_dirent *sysfs_state; /* handle for 'state'
+ struct kernfs_node *sysfs_state; /* handle for 'state'
* sysfs entry */
struct badblocks {
sector_t resync_max; /* resync should pause
* when it gets here */
- struct sysfs_dirent *sysfs_state; /* handle for 'array_state'
+ struct kernfs_node *sysfs_state; /* handle for 'array_state'
* file in sysfs.
*/
- struct sysfs_dirent *sysfs_action; /* handle for 'sync_action' */
+ struct kernfs_node *sysfs_action; /* handle for 'sync_action' */
struct work_struct del_work; /* used for delayed sysfs removal */
};
extern struct attribute_group md_bitmap_group;
-static inline struct sysfs_dirent *sysfs_get_dirent_safe(struct sysfs_dirent *sd, char *name)
+static inline struct kernfs_node *sysfs_get_dirent_safe(struct kernfs_node *sd, char *name)
{
if (sd)
return sysfs_get_dirent(sd, name);
return sd;
}
-static inline void sysfs_notify_dirent_safe(struct sysfs_dirent *sd)
+static inline void sysfs_notify_dirent_safe(struct kernfs_node *sd)
{
if (sd)
sysfs_notify_dirent(sd);
struct work_struct shutdown_work;
u8 state;
u8 shutdown_status;
- struct sysfs_dirent *state_sysfs;
+ struct kernfs_node *state_sysfs;
struct completion reset_wait;
void *log_buf_addr;
int *log_buf_len;
DEFINE_MUTEX(sysfs_mutex);
-#define to_sysfs_dirent(X) rb_entry((X), struct sysfs_dirent, s_rb)
+#define rb_to_kn(X) rb_entry((X), struct kernfs_node, s_rb)
/**
* sysfs_name_hash
}
static int sysfs_name_compare(unsigned int hash, const char *name,
- const void *ns, const struct sysfs_dirent *sd)
+ const void *ns, const struct kernfs_node *kn)
{
- if (hash != sd->s_hash)
- return hash - sd->s_hash;
- if (ns != sd->s_ns)
- return ns - sd->s_ns;
- return strcmp(name, sd->s_name);
+ if (hash != kn->s_hash)
+ return hash - kn->s_hash;
+ if (ns != kn->s_ns)
+ return ns - kn->s_ns;
+ return strcmp(name, kn->s_name);
}
-static int sysfs_sd_compare(const struct sysfs_dirent *left,
- const struct sysfs_dirent *right)
+static int sysfs_sd_compare(const struct kernfs_node *left,
+ const struct kernfs_node *right)
{
return sysfs_name_compare(left->s_hash, left->s_name, left->s_ns,
right);
}
/**
- * sysfs_link_sibling - link sysfs_dirent into sibling rbtree
- * @sd: sysfs_dirent of interest
+ * sysfs_link_sibling - link kernfs_node into sibling rbtree
+ * @kn: kernfs_node of interest
*
- * Link @sd into its sibling rbtree which starts from
- * sd->s_parent->s_dir.children.
+ * Link @kn into its sibling rbtree which starts from
+ * @kn->s_parent->s_dir.children.
*
* Locking:
* mutex_lock(sysfs_mutex)
* RETURNS:
* 0 on susccess -EEXIST on failure.
*/
-static int sysfs_link_sibling(struct sysfs_dirent *sd)
+static int sysfs_link_sibling(struct kernfs_node *kn)
{
- struct rb_node **node = &sd->s_parent->s_dir.children.rb_node;
+ struct rb_node **node = &kn->s_parent->s_dir.children.rb_node;
struct rb_node *parent = NULL;
- if (sysfs_type(sd) == SYSFS_DIR)
- sd->s_parent->s_dir.subdirs++;
+ if (sysfs_type(kn) == SYSFS_DIR)
+ kn->s_parent->s_dir.subdirs++;
while (*node) {
- struct sysfs_dirent *pos;
+ struct kernfs_node *pos;
int result;
- pos = to_sysfs_dirent(*node);
+ pos = rb_to_kn(*node);
parent = *node;
- result = sysfs_sd_compare(sd, pos);
+ result = sysfs_sd_compare(kn, pos);
if (result < 0)
node = &pos->s_rb.rb_left;
else if (result > 0)
return -EEXIST;
}
/* add new node and rebalance the tree */
- rb_link_node(&sd->s_rb, parent, node);
- rb_insert_color(&sd->s_rb, &sd->s_parent->s_dir.children);
+ rb_link_node(&kn->s_rb, parent, node);
+ rb_insert_color(&kn->s_rb, &kn->s_parent->s_dir.children);
return 0;
}
/**
- * sysfs_unlink_sibling - unlink sysfs_dirent from sibling rbtree
- * @sd: sysfs_dirent of interest
+ * sysfs_unlink_sibling - unlink kernfs_node from sibling rbtree
+ * @kn: kernfs_node of interest
*
- * Unlink @sd from its sibling rbtree which starts from
- * sd->s_parent->s_dir.children.
+ * Unlink @kn from its sibling rbtree which starts from
+ * kn->s_parent->s_dir.children.
*
* Locking:
* mutex_lock(sysfs_mutex)
*/
-static void sysfs_unlink_sibling(struct sysfs_dirent *sd)
+static void sysfs_unlink_sibling(struct kernfs_node *kn)
{
- if (sysfs_type(sd) == SYSFS_DIR)
- sd->s_parent->s_dir.subdirs--;
+ if (sysfs_type(kn) == SYSFS_DIR)
+ kn->s_parent->s_dir.subdirs--;
- rb_erase(&sd->s_rb, &sd->s_parent->s_dir.children);
+ rb_erase(&kn->s_rb, &kn->s_parent->s_dir.children);
}
/**
- * sysfs_get_active - get an active reference to sysfs_dirent
- * @sd: sysfs_dirent to get an active reference to
+ * sysfs_get_active - get an active reference to kernfs_node
+ * @kn: kernfs_node to get an active reference to
*
- * Get an active reference of @sd. This function is noop if @sd
+ * Get an active reference of @kn. This function is noop if @kn
* is NULL.
*
* RETURNS:
- * Pointer to @sd on success, NULL on failure.
+ * Pointer to @kn on success, NULL on failure.
*/
-struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd)
+struct kernfs_node *sysfs_get_active(struct kernfs_node *kn)
{
- if (unlikely(!sd))
+ if (unlikely(!kn))
return NULL;
- if (!atomic_inc_unless_negative(&sd->s_active))
+ if (!atomic_inc_unless_negative(&kn->s_active))
return NULL;
- if (sd->s_flags & SYSFS_FLAG_LOCKDEP)
- rwsem_acquire_read(&sd->dep_map, 0, 1, _RET_IP_);
- return sd;
+ if (kn->s_flags & SYSFS_FLAG_LOCKDEP)
+ rwsem_acquire_read(&kn->dep_map, 0, 1, _RET_IP_);
+ return kn;
}
/**
- * sysfs_put_active - put an active reference to sysfs_dirent
- * @sd: sysfs_dirent to put an active reference to
+ * sysfs_put_active - put an active reference to kernfs_node
+ * @kn: kernfs_node to put an active reference to
*
- * Put an active reference to @sd. This function is noop if @sd
+ * Put an active reference to @kn. This function is noop if @kn
* is NULL.
*/
-void sysfs_put_active(struct sysfs_dirent *sd)
+void sysfs_put_active(struct kernfs_node *kn)
{
int v;
- if (unlikely(!sd))
+ if (unlikely(!kn))
return;
- if (sd->s_flags & SYSFS_FLAG_LOCKDEP)
- rwsem_release(&sd->dep_map, 1, _RET_IP_);
- v = atomic_dec_return(&sd->s_active);
+ if (kn->s_flags & SYSFS_FLAG_LOCKDEP)
+ rwsem_release(&kn->dep_map, 1, _RET_IP_);
+ v = atomic_dec_return(&kn->s_active);
if (likely(v != SD_DEACTIVATED_BIAS))
return;
- /* atomic_dec_return() is a mb(), we'll always see the updated
- * sd->u.completion.
+ /*
+ * atomic_dec_return() is a mb(), we'll always see the updated
+ * kn->u.completion.
*/
- complete(sd->u.completion);
+ complete(kn->u.completion);
}
/**
- * sysfs_deactivate - deactivate sysfs_dirent
- * @sd: sysfs_dirent to deactivate
+ * sysfs_deactivate - deactivate kernfs_node
+ * @kn: kernfs_node to deactivate
*
* Deny new active references and drain existing ones.
*/
-static void sysfs_deactivate(struct sysfs_dirent *sd)
+static void sysfs_deactivate(struct kernfs_node *kn)
{
DECLARE_COMPLETION_ONSTACK(wait);
int v;
- BUG_ON(!(sd->s_flags & SYSFS_FLAG_REMOVED));
+ BUG_ON(!(kn->s_flags & SYSFS_FLAG_REMOVED));
- if (!(sysfs_type(sd) & SYSFS_ACTIVE_REF))
+ if (!(sysfs_type(kn) & SYSFS_ACTIVE_REF))
return;
- sd->u.completion = (void *)&wait;
+ kn->u.completion = (void *)&wait;
- rwsem_acquire(&sd->dep_map, 0, 0, _RET_IP_);
+ rwsem_acquire(&kn->dep_map, 0, 0, _RET_IP_);
/* atomic_add_return() is a mb(), put_active() will always see
- * the updated sd->u.completion.
+ * the updated kn->u.completion.
*/
- v = atomic_add_return(SD_DEACTIVATED_BIAS, &sd->s_active);
+ v = atomic_add_return(SD_DEACTIVATED_BIAS, &kn->s_active);
if (v != SD_DEACTIVATED_BIAS) {
- lock_contended(&sd->dep_map, _RET_IP_);
+ lock_contended(&kn->dep_map, _RET_IP_);
wait_for_completion(&wait);
}
- lock_acquired(&sd->dep_map, _RET_IP_);
- rwsem_release(&sd->dep_map, 1, _RET_IP_);
+ lock_acquired(&kn->dep_map, _RET_IP_);
+ rwsem_release(&kn->dep_map, 1, _RET_IP_);
}
/**
- * kernfs_get - get a reference count on a sysfs_dirent
- * @sd: the target sysfs_dirent
+ * kernfs_get - get a reference count on a kernfs_node
+ * @kn: the target kernfs_node
*/
-void kernfs_get(struct sysfs_dirent *sd)
+void kernfs_get(struct kernfs_node *kn)
{
- if (sd) {
- WARN_ON(!atomic_read(&sd->s_count));
- atomic_inc(&sd->s_count);
+ if (kn) {
+ WARN_ON(!atomic_read(&kn->s_count));
+ atomic_inc(&kn->s_count);
}
}
EXPORT_SYMBOL_GPL(kernfs_get);
/**
- * kernfs_put - put a reference count on a sysfs_dirent
- * @sd: the target sysfs_dirent
+ * kernfs_put - put a reference count on a kernfs_node
+ * @kn: the target kernfs_node
*
- * Put a reference count of @sd and destroy it if it reached zero.
+ * Put a reference count of @kn and destroy it if it reached zero.
*/
-void kernfs_put(struct sysfs_dirent *sd)
+void kernfs_put(struct kernfs_node *kn)
{
- struct sysfs_dirent *parent_sd;
+ struct kernfs_node *parent;
struct kernfs_root *root;
- if (!sd || !atomic_dec_and_test(&sd->s_count))
+ if (!kn || !atomic_dec_and_test(&kn->s_count))
return;
- root = kernfs_root(sd);
+ root = kernfs_root(kn);
repeat:
/* Moving/renaming is always done while holding reference.
- * sd->s_parent won't change beneath us.
+ * kn->s_parent won't change beneath us.
*/
- parent_sd = sd->s_parent;
+ parent = kn->s_parent;
- WARN(!(sd->s_flags & SYSFS_FLAG_REMOVED),
+ WARN(!(kn->s_flags & SYSFS_FLAG_REMOVED),
"sysfs: free using entry: %s/%s\n",
- parent_sd ? parent_sd->s_name : "", sd->s_name);
-
- if (sysfs_type(sd) == SYSFS_KOBJ_LINK)
- kernfs_put(sd->s_symlink.target_sd);
- if (sysfs_type(sd) & SYSFS_COPY_NAME)
- kfree(sd->s_name);
- if (sd->s_iattr) {
- if (sd->s_iattr->ia_secdata)
- security_release_secctx(sd->s_iattr->ia_secdata,
- sd->s_iattr->ia_secdata_len);
- simple_xattrs_free(&sd->s_iattr->xattrs);
+ parent ? parent->s_name : "", kn->s_name);
+
+ if (sysfs_type(kn) == SYSFS_KOBJ_LINK)
+ kernfs_put(kn->s_symlink.target_kn);
+ if (sysfs_type(kn) & SYSFS_COPY_NAME)
+ kfree(kn->s_name);
+ if (kn->s_iattr) {
+ if (kn->s_iattr->ia_secdata)
+ security_release_secctx(kn->s_iattr->ia_secdata,
+ kn->s_iattr->ia_secdata_len);
+ simple_xattrs_free(&kn->s_iattr->xattrs);
}
- kfree(sd->s_iattr);
- ida_simple_remove(&root->ino_ida, sd->s_ino);
- kmem_cache_free(sysfs_dir_cachep, sd);
+ kfree(kn->s_iattr);
+ ida_simple_remove(&root->ino_ida, kn->s_ino);
+ kmem_cache_free(sysfs_dir_cachep, kn);
- sd = parent_sd;
- if (sd) {
- if (atomic_dec_and_test(&sd->s_count))
+ kn = parent;
+ if (kn) {
+ if (atomic_dec_and_test(&kn->s_count))
goto repeat;
} else {
- /* just released the root sd, free @root too */
+ /* just released the root kn, free @root too */
ida_destroy(&root->ino_ida);
kfree(root);
}
static int sysfs_dentry_delete(const struct dentry *dentry)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
- return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED));
+ struct kernfs_node *kn = dentry->d_fsdata;
+ return !(kn && !(kn->s_flags & SYSFS_FLAG_REMOVED));
}
static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
if (flags & LOOKUP_RCU)
return -ECHILD;
- sd = dentry->d_fsdata;
+ kn = dentry->d_fsdata;
mutex_lock(&sysfs_mutex);
/* The sysfs dirent has been deleted */
- if (sd->s_flags & SYSFS_FLAG_REMOVED)
+ if (kn->s_flags & SYSFS_FLAG_REMOVED)
goto out_bad;
/* The sysfs dirent has been moved? */
- if (dentry->d_parent->d_fsdata != sd->s_parent)
+ if (dentry->d_parent->d_fsdata != kn->s_parent)
goto out_bad;
/* The sysfs dirent has been renamed */
- if (strcmp(dentry->d_name.name, sd->s_name) != 0)
+ if (strcmp(dentry->d_name.name, kn->s_name) != 0)
goto out_bad;
/* The sysfs dirent has been moved to a different namespace */
- if (sd->s_parent && kernfs_ns_enabled(sd->s_parent) &&
- sysfs_info(dentry->d_sb)->ns != sd->s_ns)
+ if (kn->s_parent && kernfs_ns_enabled(kn->s_parent) &&
+ sysfs_info(dentry->d_sb)->ns != kn->s_ns)
goto out_bad;
mutex_unlock(&sysfs_mutex);
.d_release = sysfs_dentry_release,
};
-struct sysfs_dirent *sysfs_new_dirent(struct kernfs_root *root,
- const char *name, umode_t mode, int type)
+struct kernfs_node *sysfs_new_dirent(struct kernfs_root *root,
+ const char *name, umode_t mode, int type)
{
char *dup_name = NULL;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
int ret;
if (type & SYSFS_COPY_NAME) {
return NULL;
}
- sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
- if (!sd)
+ kn = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
+ if (!kn)
goto err_out1;
ret = ida_simple_get(&root->ino_ida, 1, 0, GFP_KERNEL);
if (ret < 0)
goto err_out2;
- sd->s_ino = ret;
+ kn->s_ino = ret;
- atomic_set(&sd->s_count, 1);
- atomic_set(&sd->s_active, 0);
+ atomic_set(&kn->s_count, 1);
+ atomic_set(&kn->s_active, 0);
- sd->s_name = name;
- sd->s_mode = mode;
- sd->s_flags = type | SYSFS_FLAG_REMOVED;
+ kn->s_name = name;
+ kn->s_mode = mode;
+ kn->s_flags = type | SYSFS_FLAG_REMOVED;
- return sd;
+ return kn;
err_out2:
- kmem_cache_free(sysfs_dir_cachep, sd);
+ kmem_cache_free(sysfs_dir_cachep, kn);
err_out1:
kfree(dup_name);
return NULL;
}
/**
- * sysfs_addrm_start - prepare for sysfs_dirent add/remove
+ * sysfs_addrm_start - prepare for kernfs_node add/remove
* @acxt: pointer to sysfs_addrm_cxt to be used
*
* This function is called when the caller is about to add or remove
- * sysfs_dirent. This function acquires sysfs_mutex. @acxt is used
- * to keep and pass context to other addrm functions.
+ * kernfs_node. This function acquires sysfs_mutex. @acxt is used to
+ * keep and pass context to other addrm functions.
*
* LOCKING:
* Kernel thread context (may sleep). sysfs_mutex is locked on
}
/**
- * sysfs_add_one - add sysfs_dirent to parent without warning
+ * sysfs_add_one - add kernfs_node to parent without warning
* @acxt: addrm context to use
- * @sd: sysfs_dirent to be added
- * @parent_sd: the parent sysfs_dirent to add @sd to
+ * @kn: kernfs_node to be added
+ * @parent: the parent kernfs_node to add @kn to
*
- * Get @parent_sd and set @sd->s_parent to it and increment nlink of
- * the parent inode if @sd is a directory and link into the children
+ * Get @parent and set @kn->s_parent to it and increment nlink of
+ * the parent inode if @kn is a directory and link into the children
* list of the parent.
*
* This function should be called between calls to
* 0 on success, -EEXIST if entry with the given name already
* exists.
*/
-int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
- struct sysfs_dirent *parent_sd)
+int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct kernfs_node *kn,
+ struct kernfs_node *parent)
{
- bool has_ns = kernfs_ns_enabled(parent_sd);
+ bool has_ns = kernfs_ns_enabled(parent);
struct sysfs_inode_attrs *ps_iattr;
int ret;
- if (has_ns != (bool)sd->s_ns) {
+ if (has_ns != (bool)kn->s_ns) {
WARN(1, KERN_WARNING "sysfs: ns %s in '%s' for '%s'\n",
has_ns ? "required" : "invalid",
- parent_sd->s_name, sd->s_name);
+ parent->s_name, kn->s_name);
return -EINVAL;
}
- if (sysfs_type(parent_sd) != SYSFS_DIR)
+ if (sysfs_type(parent) != SYSFS_DIR)
return -EINVAL;
- sd->s_hash = sysfs_name_hash(sd->s_name, sd->s_ns);
- sd->s_parent = parent_sd;
- kernfs_get(parent_sd);
+ kn->s_hash = sysfs_name_hash(kn->s_name, kn->s_ns);
+ kn->s_parent = parent;
+ kernfs_get(parent);
- ret = sysfs_link_sibling(sd);
+ ret = sysfs_link_sibling(kn);
if (ret)
return ret;
/* Update timestamps on the parent */
- ps_iattr = parent_sd->s_iattr;
+ ps_iattr = parent->s_iattr;
if (ps_iattr) {
struct iattr *ps_iattrs = &ps_iattr->ia_iattr;
ps_iattrs->ia_ctime = ps_iattrs->ia_mtime = CURRENT_TIME;
}
/* Mark the entry added into directory tree */
- sd->s_flags &= ~SYSFS_FLAG_REMOVED;
+ kn->s_flags &= ~SYSFS_FLAG_REMOVED;
return 0;
}
/**
- * sysfs_remove_one - remove sysfs_dirent from parent
+ * sysfs_remove_one - remove kernfs_node from parent
* @acxt: addrm context to use
- * @sd: sysfs_dirent to be removed
+ * @kn: kernfs_node to be removed
*
- * Mark @sd removed and drop nlink of parent inode if @sd is a
- * directory. @sd is unlinked from the children list.
+ * Mark @kn removed and drop nlink of parent inode if @kn is a
+ * directory. @kn is unlinked from the children list.
*
* This function should be called between calls to
* sysfs_addrm_start() and sysfs_addrm_finish() and should be
* Determined by sysfs_addrm_start().
*/
static void sysfs_remove_one(struct sysfs_addrm_cxt *acxt,
- struct sysfs_dirent *sd)
+ struct kernfs_node *kn)
{
struct sysfs_inode_attrs *ps_iattr;
* Removal can be called multiple times on the same node. Only the
* first invocation is effective and puts the base ref.
*/
- if (sd->s_flags & SYSFS_FLAG_REMOVED)
+ if (kn->s_flags & SYSFS_FLAG_REMOVED)
return;
- if (sd->s_parent) {
- sysfs_unlink_sibling(sd);
+ if (kn->s_parent) {
+ sysfs_unlink_sibling(kn);
/* Update timestamps on the parent */
- ps_iattr = sd->s_parent->s_iattr;
+ ps_iattr = kn->s_parent->s_iattr;
if (ps_iattr) {
ps_iattr->ia_iattr.ia_ctime = CURRENT_TIME;
ps_iattr->ia_iattr.ia_mtime = CURRENT_TIME;
}
}
- sd->s_flags |= SYSFS_FLAG_REMOVED;
- sd->u.removed_list = acxt->removed;
- acxt->removed = sd;
+ kn->s_flags |= SYSFS_FLAG_REMOVED;
+ kn->u.removed_list = acxt->removed;
+ acxt->removed = kn;
}
/**
- * sysfs_addrm_finish - finish up sysfs_dirent add/remove
+ * sysfs_addrm_finish - finish up kernfs_node add/remove
* @acxt: addrm context to finish up
*
- * Finish up sysfs_dirent add/remove. Resources acquired by
- * sysfs_addrm_start() are released and removed sysfs_dirents are
+ * Finish up kernfs_node add/remove. Resources acquired by
+ * sysfs_addrm_start() are released and removed kernfs_nodes are
* cleaned up.
*
* LOCKING:
/* release resources acquired by sysfs_addrm_start() */
mutex_unlock(&sysfs_mutex);
- /* kill removed sysfs_dirents */
+ /* kill removed kernfs_nodes */
while (acxt->removed) {
- struct sysfs_dirent *sd = acxt->removed;
+ struct kernfs_node *kn = acxt->removed;
- acxt->removed = sd->u.removed_list;
+ acxt->removed = kn->u.removed_list;
- sysfs_deactivate(sd);
- sysfs_unmap_bin_file(sd);
- kernfs_put(sd);
+ sysfs_deactivate(kn);
+ sysfs_unmap_bin_file(kn);
+ kernfs_put(kn);
}
}
/**
- * kernfs_find_ns - find sysfs_dirent with the given name
- * @parent: sysfs_dirent to search under
+ * kernfs_find_ns - find kernfs_node with the given name
+ * @parent: kernfs_node to search under
* @name: name to look for
* @ns: the namespace tag to use
*
- * Look for sysfs_dirent with name @name under @parent. Returns pointer to
- * the found sysfs_dirent on success, %NULL on failure.
+ * Look for kernfs_node with name @name under @parent. Returns pointer to
+ * the found kernfs_node on success, %NULL on failure.
*/
-static struct sysfs_dirent *kernfs_find_ns(struct sysfs_dirent *parent,
- const unsigned char *name,
- const void *ns)
+static struct kernfs_node *kernfs_find_ns(struct kernfs_node *parent,
+ const unsigned char *name,
+ const void *ns)
{
struct rb_node *node = parent->s_dir.children.rb_node;
bool has_ns = kernfs_ns_enabled(parent);
hash = sysfs_name_hash(name, ns);
while (node) {
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
int result;
- sd = to_sysfs_dirent(node);
- result = sysfs_name_compare(hash, name, ns, sd);
+ kn = rb_to_kn(node);
+ result = sysfs_name_compare(hash, name, ns, kn);
if (result < 0)
node = node->rb_left;
else if (result > 0)
node = node->rb_right;
else
- return sd;
+ return kn;
}
return NULL;
}
/**
- * kernfs_find_and_get_ns - find and get sysfs_dirent with the given name
- * @parent: sysfs_dirent to search under
+ * kernfs_find_and_get_ns - find and get kernfs_node with the given name
+ * @parent: kernfs_node to search under
* @name: name to look for
* @ns: the namespace tag to use
*
- * Look for sysfs_dirent with name @name under @parent and get a reference
+ * Look for kernfs_node with name @name under @parent and get a reference
* if found. This function may sleep and returns pointer to the found
- * sysfs_dirent on success, %NULL on failure.
+ * kernfs_node on success, %NULL on failure.
*/
-struct sysfs_dirent *kernfs_find_and_get_ns(struct sysfs_dirent *parent,
- const char *name, const void *ns)
+struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,
+ const char *name, const void *ns)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
mutex_lock(&sysfs_mutex);
- sd = kernfs_find_ns(parent, name, ns);
- kernfs_get(sd);
+ kn = kernfs_find_ns(parent, name, ns);
+ kernfs_get(kn);
mutex_unlock(&sysfs_mutex);
- return sd;
+ return kn;
}
EXPORT_SYMBOL_GPL(kernfs_find_and_get_ns);
struct kernfs_root *kernfs_create_root(void *priv)
{
struct kernfs_root *root;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
root = kzalloc(sizeof(*root), GFP_KERNEL);
if (!root)
ida_init(&root->ino_ida);
- sd = sysfs_new_dirent(root, "", S_IFDIR | S_IRUGO | S_IXUGO, SYSFS_DIR);
- if (!sd) {
+ kn = sysfs_new_dirent(root, "", S_IFDIR | S_IRUGO | S_IXUGO, SYSFS_DIR);
+ if (!kn) {
ida_destroy(&root->ino_ida);
kfree(root);
return ERR_PTR(-ENOMEM);
}
- sd->s_flags &= ~SYSFS_FLAG_REMOVED;
- sd->priv = priv;
- sd->s_dir.root = root;
+ kn->s_flags &= ~SYSFS_FLAG_REMOVED;
+ kn->priv = priv;
+ kn->s_dir.root = root;
- root->sd = sd;
+ root->kn = kn;
return root;
}
*/
void kernfs_destroy_root(struct kernfs_root *root)
{
- kernfs_remove(root->sd); /* will also free @root */
+ kernfs_remove(root->kn); /* will also free @root */
}
/**
*
* Returns the created node on success, ERR_PTR() value on failure.
*/
-struct sysfs_dirent *kernfs_create_dir_ns(struct sysfs_dirent *parent,
- const char *name, void *priv,
- const void *ns)
+struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
+ const char *name, void *priv,
+ const void *ns)
{
umode_t mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO;
struct sysfs_addrm_cxt acxt;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
int rc;
/* allocate */
- sd = sysfs_new_dirent(kernfs_root(parent), name, mode, SYSFS_DIR);
- if (!sd)
+ kn = sysfs_new_dirent(kernfs_root(parent), name, mode, SYSFS_DIR);
+ if (!kn)
return ERR_PTR(-ENOMEM);
- sd->s_dir.root = parent->s_dir.root;
- sd->s_ns = ns;
- sd->priv = priv;
+ kn->s_dir.root = parent->s_dir.root;
+ kn->s_ns = ns;
+ kn->priv = priv;
/* link in */
sysfs_addrm_start(&acxt);
- rc = sysfs_add_one(&acxt, sd, parent);
+ rc = sysfs_add_one(&acxt, kn, parent);
sysfs_addrm_finish(&acxt);
if (!rc)
- return sd;
+ return kn;
- kernfs_put(sd);
+ kernfs_put(kn);
return ERR_PTR(rc);
}
unsigned int flags)
{
struct dentry *ret = NULL;
- struct dentry *parent = dentry->d_parent;
- struct sysfs_dirent *parent_sd = parent->d_fsdata;
- struct sysfs_dirent *sd;
+ struct kernfs_node *parent = dentry->d_parent->d_fsdata;
+ struct kernfs_node *kn;
struct inode *inode;
const void *ns = NULL;
mutex_lock(&sysfs_mutex);
- if (kernfs_ns_enabled(parent_sd))
+ if (kernfs_ns_enabled(parent))
ns = sysfs_info(dir->i_sb)->ns;
- sd = kernfs_find_ns(parent_sd, dentry->d_name.name, ns);
+ kn = kernfs_find_ns(parent, dentry->d_name.name, ns);
/* no such entry */
- if (!sd) {
+ if (!kn) {
ret = ERR_PTR(-ENOENT);
goto out_unlock;
}
- kernfs_get(sd);
- dentry->d_fsdata = sd;
+ kernfs_get(kn);
+ dentry->d_fsdata = kn;
/* attach dentry and inode */
- inode = sysfs_get_inode(dir->i_sb, sd);
+ inode = sysfs_get_inode(dir->i_sb, kn);
if (!inode) {
ret = ERR_PTR(-ENOMEM);
goto out_unlock;
.listxattr = sysfs_listxattr,
};
-static struct sysfs_dirent *sysfs_leftmost_descendant(struct sysfs_dirent *pos)
+static struct kernfs_node *sysfs_leftmost_descendant(struct kernfs_node *pos)
{
- struct sysfs_dirent *last;
+ struct kernfs_node *last;
while (true) {
struct rb_node *rbn;
if (!rbn)
break;
- pos = to_sysfs_dirent(rbn);
+ pos = rb_to_kn(rbn);
}
return last;
/**
* sysfs_next_descendant_post - find the next descendant for post-order walk
* @pos: the current position (%NULL to initiate traversal)
- * @root: sysfs_dirent whose descendants to walk
+ * @root: kernfs_node whose descendants to walk
*
* Find the next descendant to visit for post-order traversal of @root's
* descendants. @root is included in the iteration and the last node to be
* visited.
*/
-static struct sysfs_dirent *sysfs_next_descendant_post(struct sysfs_dirent *pos,
- struct sysfs_dirent *root)
+static struct kernfs_node *sysfs_next_descendant_post(struct kernfs_node *pos,
+ struct kernfs_node *root)
{
struct rb_node *rbn;
/* if there's an unvisited sibling, visit its leftmost descendant */
rbn = rb_next(&pos->s_rb);
if (rbn)
- return sysfs_leftmost_descendant(to_sysfs_dirent(rbn));
+ return sysfs_leftmost_descendant(rb_to_kn(rbn));
/* no sibling left, visit parent */
return pos->s_parent;
}
static void __kernfs_remove(struct sysfs_addrm_cxt *acxt,
- struct sysfs_dirent *sd)
+ struct kernfs_node *kn)
{
- struct sysfs_dirent *pos, *next;
+ struct kernfs_node *pos, *next;
- if (!sd)
+ if (!kn)
return;
- pr_debug("sysfs %s: removing\n", sd->s_name);
+ pr_debug("sysfs %s: removing\n", kn->s_name);
next = NULL;
do {
pos = next;
- next = sysfs_next_descendant_post(pos, sd);
+ next = sysfs_next_descendant_post(pos, kn);
if (pos)
sysfs_remove_one(acxt, pos);
} while (next);
}
/**
- * kernfs_remove - remove a sysfs_dirent recursively
- * @sd: the sysfs_dirent to remove
+ * kernfs_remove - remove a kernfs_node recursively
+ * @kn: the kernfs_node to remove
*
- * Remove @sd along with all its subdirectories and files.
+ * Remove @kn along with all its subdirectories and files.
*/
-void kernfs_remove(struct sysfs_dirent *sd)
+void kernfs_remove(struct kernfs_node *kn)
{
struct sysfs_addrm_cxt acxt;
sysfs_addrm_start(&acxt);
- __kernfs_remove(&acxt, sd);
+ __kernfs_remove(&acxt, kn);
sysfs_addrm_finish(&acxt);
}
/**
- * kernfs_remove_by_name_ns - find a sysfs_dirent by name and remove it
- * @dir_sd: parent of the target
- * @name: name of the sysfs_dirent to remove
- * @ns: namespace tag of the sysfs_dirent to remove
+ * kernfs_remove_by_name_ns - find a kernfs_node by name and remove it
+ * @parent: parent of the target
+ * @name: name of the kernfs_node to remove
+ * @ns: namespace tag of the kernfs_node to remove
*
- * Look for the sysfs_dirent with @name and @ns under @dir_sd and remove
- * it. Returns 0 on success, -ENOENT if such entry doesn't exist.
+ * Look for the kernfs_node with @name and @ns under @parent and remove it.
+ * Returns 0 on success, -ENOENT if such entry doesn't exist.
*/
-int kernfs_remove_by_name_ns(struct sysfs_dirent *dir_sd, const char *name,
+int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
const void *ns)
{
struct sysfs_addrm_cxt acxt;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
- if (!dir_sd) {
+ if (!parent) {
WARN(1, KERN_WARNING "sysfs: can not remove '%s', no directory\n",
name);
return -ENOENT;
sysfs_addrm_start(&acxt);
- sd = kernfs_find_ns(dir_sd, name, ns);
- if (sd)
- __kernfs_remove(&acxt, sd);
+ kn = kernfs_find_ns(parent, name, ns);
+ if (kn)
+ __kernfs_remove(&acxt, kn);
sysfs_addrm_finish(&acxt);
- if (sd)
+ if (kn)
return 0;
else
return -ENOENT;
/**
* kernfs_rename_ns - move and rename a kernfs_node
- * @sd: target node
+ * @kn: target node
* @new_parent: new parent to put @sd under
* @new_name: new name
* @new_ns: new namespace tag
*/
-int kernfs_rename_ns(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent,
+int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
const char *new_name, const void *new_ns)
{
int error;
mutex_lock(&sysfs_mutex);
error = 0;
- if ((sd->s_parent == new_parent) && (sd->s_ns == new_ns) &&
- (strcmp(sd->s_name, new_name) == 0))
+ if ((kn->s_parent == new_parent) && (kn->s_ns == new_ns) &&
+ (strcmp(kn->s_name, new_name) == 0))
goto out; /* nothing to rename */
error = -EEXIST;
if (kernfs_find_ns(new_parent, new_name, new_ns))
goto out;
- /* rename sysfs_dirent */
- if (strcmp(sd->s_name, new_name) != 0) {
+ /* rename kernfs_node */
+ if (strcmp(kn->s_name, new_name) != 0) {
error = -ENOMEM;
new_name = kstrdup(new_name, GFP_KERNEL);
if (!new_name)
goto out;
- kfree(sd->s_name);
- sd->s_name = new_name;
+ kfree(kn->s_name);
+ kn->s_name = new_name;
}
/*
* Move to the appropriate place in the appropriate directories rbtree.
*/
- sysfs_unlink_sibling(sd);
+ sysfs_unlink_sibling(kn);
kernfs_get(new_parent);
- kernfs_put(sd->s_parent);
- sd->s_ns = new_ns;
- sd->s_hash = sysfs_name_hash(sd->s_name, sd->s_ns);
- sd->s_parent = new_parent;
- sysfs_link_sibling(sd);
+ kernfs_put(kn->s_parent);
+ kn->s_ns = new_ns;
+ kn->s_hash = sysfs_name_hash(kn->s_name, kn->s_ns);
+ kn->s_parent = new_parent;
+ sysfs_link_sibling(kn);
error = 0;
out:
}
/* Relationship between s_mode and the DT_xxx types */
-static inline unsigned char dt_type(struct sysfs_dirent *sd)
+static inline unsigned char dt_type(struct kernfs_node *kn)
{
- return (sd->s_mode >> 12) & 15;
+ return (kn->s_mode >> 12) & 15;
}
static int sysfs_dir_release(struct inode *inode, struct file *filp)
return 0;
}
-static struct sysfs_dirent *sysfs_dir_pos(const void *ns,
- struct sysfs_dirent *parent_sd, loff_t hash, struct sysfs_dirent *pos)
+static struct kernfs_node *sysfs_dir_pos(const void *ns,
+ struct kernfs_node *parent, loff_t hash, struct kernfs_node *pos)
{
if (pos) {
int valid = !(pos->s_flags & SYSFS_FLAG_REMOVED) &&
- pos->s_parent == parent_sd &&
+ pos->s_parent == parent &&
hash == pos->s_hash;
kernfs_put(pos);
if (!valid)
pos = NULL;
}
if (!pos && (hash > 1) && (hash < INT_MAX)) {
- struct rb_node *node = parent_sd->s_dir.children.rb_node;
+ struct rb_node *node = parent->s_dir.children.rb_node;
while (node) {
- pos = to_sysfs_dirent(node);
+ pos = rb_to_kn(node);
if (hash < pos->s_hash)
node = node->rb_left;
if (!node)
pos = NULL;
else
- pos = to_sysfs_dirent(node);
+ pos = rb_to_kn(node);
}
return pos;
}
-static struct sysfs_dirent *sysfs_dir_next_pos(const void *ns,
- struct sysfs_dirent *parent_sd, ino_t ino, struct sysfs_dirent *pos)
+static struct kernfs_node *sysfs_dir_next_pos(const void *ns,
+ struct kernfs_node *parent, ino_t ino, struct kernfs_node *pos)
{
- pos = sysfs_dir_pos(ns, parent_sd, ino, pos);
+ pos = sysfs_dir_pos(ns, parent, ino, pos);
if (pos)
do {
struct rb_node *node = rb_next(&pos->s_rb);
if (!node)
pos = NULL;
else
- pos = to_sysfs_dirent(node);
+ pos = rb_to_kn(node);
} while (pos && pos->s_ns != ns);
return pos;
}
static int sysfs_readdir(struct file *file, struct dir_context *ctx)
{
struct dentry *dentry = file->f_path.dentry;
- struct sysfs_dirent *parent_sd = dentry->d_fsdata;
- struct sysfs_dirent *pos = file->private_data;
+ struct kernfs_node *parent = dentry->d_fsdata;
+ struct kernfs_node *pos = file->private_data;
const void *ns = NULL;
if (!dir_emit_dots(file, ctx))
return 0;
mutex_lock(&sysfs_mutex);
- if (kernfs_ns_enabled(parent_sd))
+ if (kernfs_ns_enabled(parent))
ns = sysfs_info(dentry->d_sb)->ns;
- for (pos = sysfs_dir_pos(ns, parent_sd, ctx->pos, pos);
+ for (pos = sysfs_dir_pos(ns, parent, ctx->pos, pos);
pos;
- pos = sysfs_dir_next_pos(ns, parent_sd, ctx->pos, pos)) {
+ pos = sysfs_dir_next_pos(ns, parent, ctx->pos, pos)) {
const char *name = pos->s_name;
unsigned int type = dt_type(pos);
int len = strlen(name);
/*
* There's one sysfs_open_file for each open file and one sysfs_open_dirent
- * for each sysfs_dirent with one or more open files.
+ * for each kernfs_node with one or more open files.
*
- * sysfs_dirent->s_attr.open points to sysfs_open_dirent. s_attr.open is
+ * kernfs_node->s_attr.open points to sysfs_open_dirent. s_attr.open is
* protected by sysfs_open_dirent_lock.
*
* filp->private_data points to seq_file whose ->private points to
}
/*
- * Determine the kernfs_ops for the given sysfs_dirent. This function must
+ * Determine the kernfs_ops for the given kernfs_node. This function must
* be called while holding an active reference.
*/
-static const struct kernfs_ops *kernfs_ops(struct sysfs_dirent *sd)
+static const struct kernfs_ops *kernfs_ops(struct kernfs_node *kn)
{
- if (sd->s_flags & SYSFS_FLAG_LOCKDEP)
- lockdep_assert_held(sd);
- return sd->s_attr.ops;
+ if (kn->s_flags & SYSFS_FLAG_LOCKDEP)
+ lockdep_assert_held(kn);
+ return kn->s_attr.ops;
}
static void *kernfs_seq_start(struct seq_file *sf, loff_t *ppos)
* the ops aren't called concurrently for the same open file.
*/
mutex_lock(&of->mutex);
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return ERR_PTR(-ENODEV);
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
if (ops->seq_start) {
return ops->seq_start(sf, ppos);
} else {
static void *kernfs_seq_next(struct seq_file *sf, void *v, loff_t *ppos)
{
struct sysfs_open_file *of = sf->private;
- const struct kernfs_ops *ops = kernfs_ops(of->sd);
+ const struct kernfs_ops *ops = kernfs_ops(of->kn);
if (ops->seq_next) {
return ops->seq_next(sf, v, ppos);
static void kernfs_seq_stop(struct seq_file *sf, void *v)
{
struct sysfs_open_file *of = sf->private;
- const struct kernfs_ops *ops = kernfs_ops(of->sd);
+ const struct kernfs_ops *ops = kernfs_ops(of->kn);
if (ops->seq_stop)
ops->seq_stop(sf, v);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
mutex_unlock(&of->mutex);
}
{
struct sysfs_open_file *of = sf->private;
- of->event = atomic_read(&of->sd->s_attr.open->event);
+ of->event = atomic_read(&of->kn->s_attr.open->event);
- return of->sd->s_attr.ops->seq_show(sf, v);
+ return of->kn->s_attr.ops->seq_show(sf, v);
}
static const struct seq_operations kernfs_seq_ops = {
* the ops aren't called concurrently for the same open file.
*/
mutex_lock(&of->mutex);
- if (!sysfs_get_active(of->sd)) {
+ if (!sysfs_get_active(of->kn)) {
len = -ENODEV;
mutex_unlock(&of->mutex);
goto out_free;
}
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
if (ops->read)
len = ops->read(of, buf, len, *ppos);
else
len = -EINVAL;
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
mutex_unlock(&of->mutex);
if (len < 0)
{
struct sysfs_open_file *of = sysfs_of(file);
- if (of->sd->s_flags & SYSFS_FLAG_HAS_SEQ_SHOW)
+ if (of->kn->s_flags & SYSFS_FLAG_HAS_SEQ_SHOW)
return seq_read(file, user_buf, count, ppos);
else
return kernfs_file_direct_read(of, user_buf, count, ppos);
* the ops aren't called concurrently for the same open file.
*/
mutex_lock(&of->mutex);
- if (!sysfs_get_active(of->sd)) {
+ if (!sysfs_get_active(of->kn)) {
mutex_unlock(&of->mutex);
len = -ENODEV;
goto out_free;
}
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
if (ops->write)
len = ops->write(of, buf, len, *ppos);
else
len = -EINVAL;
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
mutex_unlock(&of->mutex);
if (len > 0)
if (!of->vm_ops)
return;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return;
if (of->vm_ops->open)
of->vm_ops->open(vma);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
}
static int kernfs_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (!of->vm_ops)
return VM_FAULT_SIGBUS;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return VM_FAULT_SIGBUS;
ret = VM_FAULT_SIGBUS;
if (of->vm_ops->fault)
ret = of->vm_ops->fault(vma, vmf);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return VM_FAULT_SIGBUS;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return VM_FAULT_SIGBUS;
ret = 0;
else
file_update_time(file);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return -EINVAL;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return -EINVAL;
ret = -EINVAL;
if (of->vm_ops->access)
ret = of->vm_ops->access(vma, addr, buf, len, write);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return 0;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return -EINVAL;
ret = 0;
if (of->vm_ops->set_policy)
ret = of->vm_ops->set_policy(vma, new);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
if (!of->vm_ops)
return vma->vm_policy;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return vma->vm_policy;
pol = vma->vm_policy;
if (of->vm_ops->get_policy)
pol = of->vm_ops->get_policy(vma, addr);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return pol;
}
if (!of->vm_ops)
return 0;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
return 0;
ret = 0;
if (of->vm_ops->migrate)
ret = of->vm_ops->migrate(vma, from, to, flags);
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
return ret;
}
#endif
* without grabbing @of->mutex by testing HAS_MMAP flag. See the
* comment in kernfs_file_open() for more details.
*/
- if (!(of->sd->s_flags & SYSFS_FLAG_HAS_MMAP))
+ if (!(of->kn->s_flags & SYSFS_FLAG_HAS_MMAP))
return -ENODEV;
mutex_lock(&of->mutex);
rc = -ENODEV;
- if (!sysfs_get_active(of->sd))
+ if (!sysfs_get_active(of->kn))
goto out_unlock;
- ops = kernfs_ops(of->sd);
+ ops = kernfs_ops(of->kn);
rc = ops->mmap(of, vma);
/*
of->vm_ops = vma->vm_ops;
vma->vm_ops = &kernfs_vm_ops;
out_put:
- sysfs_put_active(of->sd);
+ sysfs_put_active(of->kn);
out_unlock:
mutex_unlock(&of->mutex);
/**
* sysfs_get_open_dirent - get or create sysfs_open_dirent
- * @sd: target sysfs_dirent
+ * @kn: target kernfs_node
* @of: sysfs_open_file for this instance of open
*
- * If @sd->s_attr.open exists, increment its reference count;
+ * If @kn->s_attr.open exists, increment its reference count;
* otherwise, create one. @of is chained to the files list.
*
* LOCKING:
* RETURNS:
* 0 on success, -errno on failure.
*/
-static int sysfs_get_open_dirent(struct sysfs_dirent *sd,
+static int sysfs_get_open_dirent(struct kernfs_node *kn,
struct sysfs_open_file *of)
{
struct sysfs_open_dirent *od, *new_od = NULL;
mutex_lock(&sysfs_open_file_mutex);
spin_lock_irq(&sysfs_open_dirent_lock);
- if (!sd->s_attr.open && new_od) {
- sd->s_attr.open = new_od;
+ if (!kn->s_attr.open && new_od) {
+ kn->s_attr.open = new_od;
new_od = NULL;
}
- od = sd->s_attr.open;
+ od = kn->s_attr.open;
if (od) {
atomic_inc(&od->refcnt);
list_add_tail(&of->list, &od->files);
/**
* sysfs_put_open_dirent - put sysfs_open_dirent
- * @sd: target sysfs_dirent
+ * @kn: target kernfs_nodet
* @of: associated sysfs_open_file
*
- * Put @sd->s_attr.open and unlink @of from the files list. If
+ * Put @kn->s_attr.open and unlink @of from the files list. If
* reference count reaches zero, disassociate and free it.
*
* LOCKING:
* None.
*/
-static void sysfs_put_open_dirent(struct sysfs_dirent *sd,
+static void sysfs_put_open_dirent(struct kernfs_node *kn,
struct sysfs_open_file *of)
{
- struct sysfs_open_dirent *od = sd->s_attr.open;
+ struct sysfs_open_dirent *od = kn->s_attr.open;
unsigned long flags;
mutex_lock(&sysfs_open_file_mutex);
list_del(&of->list);
if (atomic_dec_and_test(&od->refcnt))
- sd->s_attr.open = NULL;
+ kn->s_attr.open = NULL;
else
od = NULL;
static int kernfs_file_open(struct inode *inode, struct file *file)
{
- struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+ struct kernfs_node *kn = file->f_path.dentry->d_fsdata;
const struct kernfs_ops *ops;
struct sysfs_open_file *of;
bool has_read, has_write, has_mmap;
int error = -EACCES;
- if (!sysfs_get_active(attr_sd))
+ if (!sysfs_get_active(kn))
return -ENODEV;
- ops = kernfs_ops(attr_sd);
+ ops = kernfs_ops(kn);
has_read = ops->seq_show || ops->read || ops->mmap;
has_write = ops->write || ops->mmap;
else
mutex_init(&of->mutex);
- of->sd = attr_sd;
+ of->kn = kn;
of->file = file;
/*
file->f_mode |= FMODE_PWRITE;
/* make sure we have open dirent struct */
- error = sysfs_get_open_dirent(attr_sd, of);
+ error = sysfs_get_open_dirent(kn, of);
if (error)
goto err_close;
/* open succeeded, put active references */
- sysfs_put_active(attr_sd);
+ sysfs_put_active(kn);
return 0;
err_close:
err_free:
kfree(of);
err_out:
- sysfs_put_active(attr_sd);
+ sysfs_put_active(kn);
return error;
}
static int kernfs_file_release(struct inode *inode, struct file *filp)
{
- struct sysfs_dirent *sd = filp->f_path.dentry->d_fsdata;
+ struct kernfs_node *kn = filp->f_path.dentry->d_fsdata;
struct sysfs_open_file *of = sysfs_of(filp);
- sysfs_put_open_dirent(sd, of);
+ sysfs_put_open_dirent(kn, of);
seq_release(inode, filp);
kfree(of);
return 0;
}
-void sysfs_unmap_bin_file(struct sysfs_dirent *sd)
+void sysfs_unmap_bin_file(struct kernfs_node *kn)
{
struct sysfs_open_dirent *od;
struct sysfs_open_file *of;
- if (!(sd->s_flags & SYSFS_FLAG_HAS_MMAP))
+ if (!(kn->s_flags & SYSFS_FLAG_HAS_MMAP))
return;
spin_lock_irq(&sysfs_open_dirent_lock);
- od = sd->s_attr.open;
+ od = kn->s_attr.open;
if (od)
atomic_inc(&od->refcnt);
spin_unlock_irq(&sysfs_open_dirent_lock);
}
mutex_unlock(&sysfs_open_file_mutex);
- sysfs_put_open_dirent(sd, NULL);
+ sysfs_put_open_dirent(kn, NULL);
}
/* Sysfs attribute files are pollable. The idea is that you read
static unsigned int kernfs_file_poll(struct file *filp, poll_table *wait)
{
struct sysfs_open_file *of = sysfs_of(filp);
- struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
- struct sysfs_open_dirent *od = attr_sd->s_attr.open;
+ struct kernfs_node *kn = filp->f_path.dentry->d_fsdata;
+ struct sysfs_open_dirent *od = kn->s_attr.open;
/* need parent for the kobj, grab both */
- if (!sysfs_get_active(attr_sd))
+ if (!sysfs_get_active(kn))
goto trigger;
poll_wait(filp, &od->poll, wait);
- sysfs_put_active(attr_sd);
+ sysfs_put_active(kn);
if (of->event != atomic_read(&od->event))
goto trigger;
/**
* kernfs_notify - notify a kernfs file
- * @sd: file to notify
+ * @kn: file to notify
*
- * Notify @sd such that poll(2) on @sd wakes up.
+ * Notify @kn such that poll(2) on @kn wakes up.
*/
-void kernfs_notify(struct sysfs_dirent *sd)
+void kernfs_notify(struct kernfs_node *kn)
{
struct sysfs_open_dirent *od;
unsigned long flags;
spin_lock_irqsave(&sysfs_open_dirent_lock, flags);
- if (!WARN_ON(sysfs_type(sd) != SYSFS_KOBJ_ATTR)) {
- od = sd->s_attr.open;
+ if (!WARN_ON(sysfs_type(kn) != SYSFS_KOBJ_ATTR)) {
+ od = kn->s_attr.open;
if (od) {
atomic_inc(&od->event);
wake_up_interruptible(&od->poll);
*
* Returns the created node on success, ERR_PTR() value on error.
*/
-struct sysfs_dirent *kernfs_create_file_ns_key(struct sysfs_dirent *parent,
- const char *name,
- umode_t mode, loff_t size,
- const struct kernfs_ops *ops,
- void *priv, const void *ns,
- struct lock_class_key *key)
+struct kernfs_node *kernfs_create_file_ns_key(struct kernfs_node *parent,
+ const char *name,
+ umode_t mode, loff_t size,
+ const struct kernfs_ops *ops,
+ void *priv, const void *ns,
+ struct lock_class_key *key)
{
struct sysfs_addrm_cxt acxt;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
int rc;
- sd = sysfs_new_dirent(kernfs_root(parent), name,
+ kn = sysfs_new_dirent(kernfs_root(parent), name,
(mode & S_IALLUGO) | S_IFREG, SYSFS_KOBJ_ATTR);
- if (!sd)
+ if (!kn)
return ERR_PTR(-ENOMEM);
- sd->s_attr.ops = ops;
- sd->s_attr.size = size;
- sd->s_ns = ns;
- sd->priv = priv;
+ kn->s_attr.ops = ops;
+ kn->s_attr.size = size;
+ kn->s_ns = ns;
+ kn->priv = priv;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (key) {
- lockdep_init_map(&sd->dep_map, "s_active", key, 0);
- sd->s_flags |= SYSFS_FLAG_LOCKDEP;
+ lockdep_init_map(&kn->dep_map, "s_active", key, 0);
+ kn->s_flags |= SYSFS_FLAG_LOCKDEP;
}
#endif
/*
- * sd->s_attr.ops is accesible only while holding active ref. We
+ * kn->s_attr.ops is accesible only while holding active ref. We
* need to know whether some ops are implemented outside active
* ref. Cache their existence in flags.
*/
if (ops->seq_show)
- sd->s_flags |= SYSFS_FLAG_HAS_SEQ_SHOW;
+ kn->s_flags |= SYSFS_FLAG_HAS_SEQ_SHOW;
if (ops->mmap)
- sd->s_flags |= SYSFS_FLAG_HAS_MMAP;
+ kn->s_flags |= SYSFS_FLAG_HAS_MMAP;
sysfs_addrm_start(&acxt);
- rc = sysfs_add_one(&acxt, sd, parent);
+ rc = sysfs_add_one(&acxt, kn, parent);
sysfs_addrm_finish(&acxt);
if (rc) {
- kernfs_put(sd);
+ kernfs_put(kn);
return ERR_PTR(rc);
}
- return sd;
+ return kn;
}
panic("failed to init sysfs_backing_dev_info");
}
-static struct sysfs_inode_attrs *sysfs_inode_attrs(struct sysfs_dirent *sd)
+static struct sysfs_inode_attrs *sysfs_inode_attrs(struct kernfs_node *kn)
{
struct iattr *iattrs;
- if (sd->s_iattr)
- return sd->s_iattr;
+ if (kn->s_iattr)
+ return kn->s_iattr;
- sd->s_iattr = kzalloc(sizeof(struct sysfs_inode_attrs), GFP_KERNEL);
- if (!sd->s_iattr)
+ kn->s_iattr = kzalloc(sizeof(struct sysfs_inode_attrs), GFP_KERNEL);
+ if (!kn->s_iattr)
return NULL;
- iattrs = &sd->s_iattr->ia_iattr;
+ iattrs = &kn->s_iattr->ia_iattr;
/* assign default attributes */
- iattrs->ia_mode = sd->s_mode;
+ iattrs->ia_mode = kn->s_mode;
iattrs->ia_uid = GLOBAL_ROOT_UID;
iattrs->ia_gid = GLOBAL_ROOT_GID;
iattrs->ia_atime = iattrs->ia_mtime = iattrs->ia_ctime = CURRENT_TIME;
- simple_xattrs_init(&sd->s_iattr->xattrs);
+ simple_xattrs_init(&kn->s_iattr->xattrs);
- return sd->s_iattr;
+ return kn->s_iattr;
}
-static int __kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr)
+static int __kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)
{
struct sysfs_inode_attrs *attrs;
struct iattr *iattrs;
unsigned int ia_valid = iattr->ia_valid;
- attrs = sysfs_inode_attrs(sd);
+ attrs = sysfs_inode_attrs(kn);
if (!attrs)
return -ENOMEM;
iattrs->ia_ctime = iattr->ia_ctime;
if (ia_valid & ATTR_MODE) {
umode_t mode = iattr->ia_mode;
- iattrs->ia_mode = sd->s_mode = mode;
+ iattrs->ia_mode = kn->s_mode = mode;
}
return 0;
}
/**
* kernfs_setattr - set iattr on a node
- * @sd: target node
+ * @kn: target node
* @iattr: iattr to set
*
* Returns 0 on success, -errno on failure.
*/
-int kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr)
+int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)
{
int ret;
mutex_lock(&sysfs_mutex);
- ret = __kernfs_setattr(sd, iattr);
+ ret = __kernfs_setattr(kn, iattr);
mutex_unlock(&sysfs_mutex);
return ret;
}
int sysfs_setattr(struct dentry *dentry, struct iattr *iattr)
{
struct inode *inode = dentry->d_inode;
- struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct kernfs_node *kn = dentry->d_fsdata;
int error;
- if (!sd)
+ if (!kn)
return -EINVAL;
mutex_lock(&sysfs_mutex);
if (error)
goto out;
- error = __kernfs_setattr(sd, iattr);
+ error = __kernfs_setattr(kn, iattr);
if (error)
goto out;
return error;
}
-static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata,
+static int sysfs_sd_setsecdata(struct kernfs_node *kn, void **secdata,
u32 *secdata_len)
{
struct sysfs_inode_attrs *attrs;
void *old_secdata;
size_t old_secdata_len;
- attrs = sysfs_inode_attrs(sd);
+ attrs = sysfs_inode_attrs(kn);
if (!attrs)
return -ENOMEM;
int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct kernfs_node *kn = dentry->d_fsdata;
struct sysfs_inode_attrs *attrs;
void *secdata;
int error;
u32 secdata_len = 0;
- attrs = sysfs_inode_attrs(sd);
+ attrs = sysfs_inode_attrs(kn);
if (!attrs)
return -ENOMEM;
return error;
mutex_lock(&sysfs_mutex);
- error = sysfs_sd_setsecdata(sd, &secdata, &secdata_len);
+ error = sysfs_sd_setsecdata(kn, &secdata, &secdata_len);
mutex_unlock(&sysfs_mutex);
if (secdata)
int sysfs_removexattr(struct dentry *dentry, const char *name)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct kernfs_node *kn = dentry->d_fsdata;
struct sysfs_inode_attrs *attrs;
- attrs = sysfs_inode_attrs(sd);
+ attrs = sysfs_inode_attrs(kn);
if (!attrs)
return -ENOMEM;
ssize_t sysfs_getxattr(struct dentry *dentry, const char *name, void *buf,
size_t size)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct kernfs_node *kn = dentry->d_fsdata;
struct sysfs_inode_attrs *attrs;
- attrs = sysfs_inode_attrs(sd);
+ attrs = sysfs_inode_attrs(kn);
if (!attrs)
return -ENOMEM;
ssize_t sysfs_listxattr(struct dentry *dentry, char *buf, size_t size)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct kernfs_node *kn = dentry->d_fsdata;
struct sysfs_inode_attrs *attrs;
- attrs = sysfs_inode_attrs(sd);
+ attrs = sysfs_inode_attrs(kn);
if (!attrs)
return -ENOMEM;
inode->i_ctime = iattr->ia_ctime;
}
-static void sysfs_refresh_inode(struct sysfs_dirent *sd, struct inode *inode)
+static void sysfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)
{
- struct sysfs_inode_attrs *attrs = sd->s_iattr;
+ struct sysfs_inode_attrs *attrs = kn->s_iattr;
- inode->i_mode = sd->s_mode;
+ inode->i_mode = kn->s_mode;
if (attrs) {
- /* sysfs_dirent has non-default attributes
- * get them from persistent copy in sysfs_dirent
+ /*
+ * kernfs_node has non-default attributes get them from
+ * persistent copy in kernfs_node.
*/
set_inode_attr(inode, &attrs->ia_iattr);
security_inode_notifysecctx(inode, attrs->ia_secdata,
attrs->ia_secdata_len);
}
- if (sysfs_type(sd) == SYSFS_DIR)
- set_nlink(inode, sd->s_dir.subdirs + 2);
+ if (sysfs_type(kn) == SYSFS_DIR)
+ set_nlink(inode, kn->s_dir.subdirs + 2);
}
int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
+ struct kernfs_node *kn = dentry->d_fsdata;
struct inode *inode = dentry->d_inode;
mutex_lock(&sysfs_mutex);
- sysfs_refresh_inode(sd, inode);
+ sysfs_refresh_inode(kn, inode);
mutex_unlock(&sysfs_mutex);
generic_fillattr(inode, stat);
return 0;
}
-static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
+static void sysfs_init_inode(struct kernfs_node *kn, struct inode *inode)
{
- kernfs_get(sd);
- inode->i_private = sd;
+ kernfs_get(kn);
+ inode->i_private = kn;
inode->i_mapping->a_ops = &sysfs_aops;
inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
inode->i_op = &sysfs_inode_operations;
- set_default_inode_attr(inode, sd->s_mode);
- sysfs_refresh_inode(sd, inode);
+ set_default_inode_attr(inode, kn->s_mode);
+ sysfs_refresh_inode(kn, inode);
/* initialize inode according to type */
- switch (sysfs_type(sd)) {
+ switch (sysfs_type(kn)) {
case SYSFS_DIR:
inode->i_op = &sysfs_dir_inode_operations;
inode->i_fop = &sysfs_dir_operations;
break;
case SYSFS_KOBJ_ATTR:
- inode->i_size = sd->s_attr.size;
+ inode->i_size = kn->s_attr.size;
inode->i_fop = &kernfs_file_operations;
break;
case SYSFS_KOBJ_LINK:
}
/**
- * sysfs_get_inode - get inode for sysfs_dirent
+ * sysfs_get_inode - get inode for kernfs_node
* @sb: super block
- * @sd: sysfs_dirent to allocate inode for
+ * @kn: kernfs_node to allocate inode for
*
- * Get inode for @sd. If such inode doesn't exist, a new inode
- * is allocated and basics are initialized. New inode is
- * returned locked.
+ * Get inode for @kn. If such inode doesn't exist, a new inode is
+ * allocated and basics are initialized. New inode is returned
+ * locked.
*
* LOCKING:
* Kernel thread context (may sleep).
* RETURNS:
* Pointer to allocated inode on success, NULL on failure.
*/
-struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd)
+struct inode *sysfs_get_inode(struct super_block *sb, struct kernfs_node *kn)
{
struct inode *inode;
- inode = iget_locked(sb, sd->s_ino);
+ inode = iget_locked(sb, kn->s_ino);
if (inode && (inode->i_state & I_NEW))
- sysfs_init_inode(sd, inode);
+ sysfs_init_inode(kn, inode);
return inode;
}
/*
- * The sysfs_dirent serves as both an inode and a directory entry for sysfs.
- * To prevent the sysfs inode numbers from being freed prematurely we take a
- * reference to sysfs_dirent from the sysfs inode. A
+ * The kernfs_node serves as both an inode and a directory entry for sysfs.
+ * To prevent the sysfs inode numbers from being freed prematurely we take
+ * a reference to kernfs_node from the sysfs inode. A
* super_operations.evict_inode() implementation is needed to drop that
* reference upon inode destruction.
*/
void sysfs_evict_inode(struct inode *inode)
{
- struct sysfs_dirent *sd = inode->i_private;
+ struct kernfs_node *kn = inode->i_private;
truncate_inode_pages(&inode->i_data, 0);
clear_inode(inode);
- kernfs_put(sd);
+ kernfs_put(kn);
}
int sysfs_permission(struct inode *inode, int mask)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
- sd = inode->i_private;
+ kn = inode->i_private;
mutex_lock(&sysfs_mutex);
- sysfs_refresh_inode(sd, inode);
+ sysfs_refresh_inode(kn, inode);
mutex_unlock(&sysfs_mutex);
return generic_permission(inode, mask);
/* SYSFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
/**
- * kernfs_root - find out the kernfs_root a sysfs_dirent belongs to
- * @sd: sysfs_dirent of interest
+ * kernfs_root - find out the kernfs_root a kernfs_node belongs to
+ * @kn: kernfs_node of interest
*
- * Return the kernfs_root @sd belongs to.
+ * Return the kernfs_root @kn belongs to.
*/
-static inline struct kernfs_root *kernfs_root(struct sysfs_dirent *sd)
+static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
{
/* if parent exists, it's always a dir; otherwise, @sd is a dir */
- if (sd->s_parent)
- sd = sd->s_parent;
- return sd->s_dir.root;
+ if (kn->s_parent)
+ kn = kn->s_parent;
+ return kn->s_dir.root;
}
/*
* Context structure to be used while adding/removing nodes.
*/
struct sysfs_addrm_cxt {
- struct sysfs_dirent *removed;
+ struct kernfs_node *removed;
};
/*
struct kernfs_root *root;
/*
- * Each sb is associated with one namespace tag, currently the network
- * namespace of the task which mounted this sysfs instance. If multiple
- * tags become necessary, make the following an array and compare
- * sysfs_dirent tag against every entry.
+ * Each sb is associated with one namespace tag, currently the
+ * network namespace of the task which mounted this sysfs instance.
+ * If multiple tags become necessary, make the following an array
+ * and compare kernfs_node tag against every entry.
*/
const void *ns;
};
/*
* inode.c
*/
-struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd);
+struct inode *sysfs_get_inode(struct super_block *sb, struct kernfs_node *kn);
void sysfs_evict_inode(struct inode *inode);
int sysfs_permission(struct inode *inode, int mask);
int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;
-struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
-void sysfs_put_active(struct sysfs_dirent *sd);
+struct kernfs_node *sysfs_get_active(struct kernfs_node *kn);
+void sysfs_put_active(struct kernfs_node *kn);
void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt);
-int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd,
- struct sysfs_dirent *parent_sd);
+int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct kernfs_node *kn,
+ struct kernfs_node *parent);
void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
-struct sysfs_dirent *sysfs_new_dirent(struct kernfs_root *root,
- const char *name, umode_t mode, int type);
+struct kernfs_node *sysfs_new_dirent(struct kernfs_root *root,
+ const char *name, umode_t mode, int type);
/*
* file.c
*/
extern const struct file_operations kernfs_file_operations;
-void sysfs_unmap_bin_file(struct sysfs_dirent *sd);
+void sysfs_unmap_bin_file(struct kernfs_node *kn);
/*
* symlink.c
/* get root inode, initialize and unlock it */
mutex_lock(&sysfs_mutex);
- inode = sysfs_get_inode(sb, info->root->sd);
+ inode = sysfs_get_inode(sb, info->root->kn);
mutex_unlock(&sysfs_mutex);
if (!inode) {
pr_debug("sysfs: could not get root inode\n");
pr_debug("%s: could not get root dentry!\n", __func__);
return -ENOMEM;
}
- kernfs_get(info->root->sd);
- root->d_fsdata = info->root->sd;
+ kernfs_get(info->root->kn);
+ root->d_fsdata = info->root->kn;
sb->s_root = root;
sb->s_d_op = &sysfs_dentry_ops;
return 0;
void kernfs_kill_sb(struct super_block *sb)
{
struct sysfs_super_info *info = sysfs_info(sb);
- struct sysfs_dirent *root_sd = sb->s_root->d_fsdata;
+ struct kernfs_node *root_kn = sb->s_root->d_fsdata;
/*
* Remove the superblock from fs_supers/s_instances
*/
kill_anon_super(sb);
kfree(info);
- kernfs_put(root_sd);
+ kernfs_put(root_kn);
}
void __init kernfs_init(void)
{
sysfs_dir_cachep = kmem_cache_create("sysfs_dir_cache",
- sizeof(struct sysfs_dirent),
+ sizeof(struct kernfs_node),
0, SLAB_PANIC, NULL);
sysfs_inode_init();
}
*
* Returns the created node on success, ERR_PTR() value on error.
*/
-struct sysfs_dirent *kernfs_create_link(struct sysfs_dirent *parent,
- const char *name,
- struct sysfs_dirent *target)
+struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
+ const char *name,
+ struct kernfs_node *target)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
struct sysfs_addrm_cxt acxt;
int error;
- sd = sysfs_new_dirent(kernfs_root(parent), name, S_IFLNK|S_IRWXUGO,
+ kn = sysfs_new_dirent(kernfs_root(parent), name, S_IFLNK|S_IRWXUGO,
SYSFS_KOBJ_LINK);
- if (!sd)
+ if (!kn)
return ERR_PTR(-ENOMEM);
if (kernfs_ns_enabled(parent))
- sd->s_ns = target->s_ns;
- sd->s_symlink.target_sd = target;
+ kn->s_ns = target->s_ns;
+ kn->s_symlink.target_kn = target;
kernfs_get(target); /* ref owned by symlink */
sysfs_addrm_start(&acxt);
- error = sysfs_add_one(&acxt, sd, parent);
+ error = sysfs_add_one(&acxt, kn, parent);
sysfs_addrm_finish(&acxt);
if (!error)
- return sd;
+ return kn;
- kernfs_put(sd);
+ kernfs_put(kn);
return ERR_PTR(error);
}
-static int sysfs_get_target_path(struct sysfs_dirent *parent_sd,
- struct sysfs_dirent *target_sd, char *path)
+static int sysfs_get_target_path(struct kernfs_node *parent,
+ struct kernfs_node *target, char *path)
{
- struct sysfs_dirent *base, *sd;
+ struct kernfs_node *base, *kn;
char *s = path;
int len = 0;
/* go up to the root, stop at the base */
- base = parent_sd;
+ base = parent;
while (base->s_parent) {
- sd = target_sd->s_parent;
- while (sd->s_parent && base != sd)
- sd = sd->s_parent;
+ kn = target->s_parent;
+ while (kn->s_parent && base != kn)
+ kn = kn->s_parent;
- if (base == sd)
+ if (base == kn)
break;
strcpy(s, "../");
}
/* determine end of target string for reverse fillup */
- sd = target_sd;
- while (sd->s_parent && sd != base) {
- len += strlen(sd->s_name) + 1;
- sd = sd->s_parent;
+ kn = target;
+ while (kn->s_parent && kn != base) {
+ len += strlen(kn->s_name) + 1;
+ kn = kn->s_parent;
}
/* check limits */
return -ENAMETOOLONG;
/* reverse fillup of target string from target to base */
- sd = target_sd;
- while (sd->s_parent && sd != base) {
- int slen = strlen(sd->s_name);
+ kn = target;
+ while (kn->s_parent && kn != base) {
+ int slen = strlen(kn->s_name);
len -= slen;
- strncpy(s + len, sd->s_name, slen);
+ strncpy(s + len, kn->s_name, slen);
if (len)
s[--len] = '/';
- sd = sd->s_parent;
+ kn = kn->s_parent;
}
return 0;
static int sysfs_getlink(struct dentry *dentry, char *path)
{
- struct sysfs_dirent *sd = dentry->d_fsdata;
- struct sysfs_dirent *parent_sd = sd->s_parent;
- struct sysfs_dirent *target_sd = sd->s_symlink.target_sd;
+ struct kernfs_node *kn = dentry->d_fsdata;
+ struct kernfs_node *parent = kn->s_parent;
+ struct kernfs_node *target = kn->s_symlink.target_kn;
int error;
mutex_lock(&sysfs_mutex);
- error = sysfs_get_target_path(parent_sd, target_sd, path);
+ error = sysfs_get_target_path(parent, target, path);
mutex_unlock(&sysfs_mutex);
return error;
/**
* sysfs_pathname - return full path to sysfs dirent
- * @sd: sysfs_dirent whose path we want
+ * @kn: kernfs_node whose path we want
* @path: caller allocated buffer of size PATH_MAX
*
* Gives the name "/" to the sysfs_root entry; any path returned
* is relative to wherever sysfs is mounted.
*/
-static char *sysfs_pathname(struct sysfs_dirent *sd, char *path)
+static char *sysfs_pathname(struct kernfs_node *kn, char *path)
{
- if (sd->s_parent) {
- sysfs_pathname(sd->s_parent, path);
+ if (kn->s_parent) {
+ sysfs_pathname(kn->s_parent, path);
strlcat(path, "/", PATH_MAX);
}
- strlcat(path, sd->s_name, PATH_MAX);
+ strlcat(path, kn->s_name, PATH_MAX);
return path;
}
-void sysfs_warn_dup(struct sysfs_dirent *parent, const char *name)
+void sysfs_warn_dup(struct kernfs_node *parent, const char *name)
{
char *path;
*/
int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
{
- struct sysfs_dirent *parent_sd, *sd;
+ struct kernfs_node *parent, *kn;
BUG_ON(!kobj);
if (kobj->parent)
- parent_sd = kobj->parent->sd;
+ parent = kobj->parent->sd;
else
- parent_sd = sysfs_root_sd;
+ parent = sysfs_root_kn;
- if (!parent_sd)
+ if (!parent)
return -ENOENT;
- sd = kernfs_create_dir_ns(parent_sd, kobject_name(kobj), kobj, ns);
- if (IS_ERR(sd)) {
- if (PTR_ERR(sd) == -EEXIST)
- sysfs_warn_dup(parent_sd, kobject_name(kobj));
- return PTR_ERR(sd);
+ kn = kernfs_create_dir_ns(parent, kobject_name(kobj), kobj, ns);
+ if (IS_ERR(kn)) {
+ if (PTR_ERR(kn) == -EEXIST)
+ sysfs_warn_dup(parent, kobject_name(kobj));
+ return PTR_ERR(kn);
}
- kobj->sd = sd;
+ kobj->sd = kn;
return 0;
}
*/
void sysfs_remove_dir(struct kobject *kobj)
{
- struct sysfs_dirent *sd = kobj->sd;
+ struct kernfs_node *kn = kobj->sd;
/*
* In general, kboject owner is responsible for ensuring removal
* doesn't race with other operations and sysfs doesn't provide any
* protection; however, when @kobj is used as a symlink target, the
* symlinking entity usually doesn't own @kobj and thus has no
- * control over removal. @kobj->sd may be removed anytime and
- * symlink code may end up dereferencing an already freed sd.
+ * control over removal. @kobj->sd may be removed anytime
+ * and symlink code may end up dereferencing an already freed node.
*
- * sysfs_symlink_target_lock synchronizes @kobj->sd disassociation
- * against symlink operations so that symlink code can safely
- * dereference @kobj->sd.
+ * sysfs_symlink_target_lock synchronizes @kobj->sd
+ * disassociation against symlink operations so that symlink code
+ * can safely dereference @kobj->sd.
*/
spin_lock(&sysfs_symlink_target_lock);
kobj->sd = NULL;
spin_unlock(&sysfs_symlink_target_lock);
- if (sd) {
- WARN_ON_ONCE(sysfs_type(sd) != SYSFS_DIR);
- kernfs_remove(sd);
+ if (kn) {
+ WARN_ON_ONCE(sysfs_type(kn) != SYSFS_DIR);
+ kernfs_remove(kn);
}
}
int sysfs_rename_dir_ns(struct kobject *kobj, const char *new_name,
const void *new_ns)
{
- struct sysfs_dirent *parent_sd = kobj->sd->s_parent;
+ struct kernfs_node *parent = kobj->sd->s_parent;
- return kernfs_rename_ns(kobj->sd, parent_sd, new_name, new_ns);
+ return kernfs_rename_ns(kobj->sd, parent, new_name, new_ns);
}
int sysfs_move_dir_ns(struct kobject *kobj, struct kobject *new_parent_kobj,
const void *new_ns)
{
- struct sysfs_dirent *sd = kobj->sd;
- struct sysfs_dirent *new_parent_sd;
+ struct kernfs_node *kn = kobj->sd;
+ struct kernfs_node *new_parent;
- BUG_ON(!sd->s_parent);
- new_parent_sd = new_parent_kobj && new_parent_kobj->sd ?
- new_parent_kobj->sd : sysfs_root_sd;
+ BUG_ON(!kn->s_parent);
+ new_parent = new_parent_kobj && new_parent_kobj->sd ?
+ new_parent_kobj->sd : sysfs_root_kn;
- return kernfs_rename_ns(sd, new_parent_sd, sd->s_name, new_ns);
+ return kernfs_rename_ns(kn, new_parent, kn->s_name, new_ns);
}
#include "../kernfs/kernfs-internal.h"
/*
- * Determine ktype->sysfs_ops for the given sysfs_dirent. This function
+ * Determine ktype->sysfs_ops for the given kernfs_node. This function
* must be called while holding an active reference.
*/
-static const struct sysfs_ops *sysfs_file_ops(struct sysfs_dirent *sd)
+static const struct sysfs_ops *sysfs_file_ops(struct kernfs_node *kn)
{
- struct kobject *kobj = sd->s_parent->priv;
+ struct kobject *kobj = kn->s_parent->priv;
- if (sd->s_flags & SYSFS_FLAG_LOCKDEP)
- lockdep_assert_held(sd);
+ if (kn->s_flags & SYSFS_FLAG_LOCKDEP)
+ lockdep_assert_held(kn);
return kobj->ktype ? kobj->ktype->sysfs_ops : NULL;
}
static int sysfs_kf_seq_show(struct seq_file *sf, void *v)
{
struct sysfs_open_file *of = sf->private;
- struct kobject *kobj = of->sd->s_parent->priv;
- const struct sysfs_ops *ops = sysfs_file_ops(of->sd);
+ struct kobject *kobj = of->kn->s_parent->priv;
+ const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
ssize_t count;
char *buf;
* if @ops->show() isn't implemented.
*/
if (ops->show) {
- count = ops->show(kobj, of->sd->priv, buf);
+ count = ops->show(kobj, of->kn->priv, buf);
if (count < 0)
return count;
}
static ssize_t sysfs_kf_bin_read(struct sysfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
- struct bin_attribute *battr = of->sd->priv;
- struct kobject *kobj = of->sd->s_parent->priv;
+ struct bin_attribute *battr = of->kn->priv;
+ struct kobject *kobj = of->kn->s_parent->priv;
loff_t size = file_inode(of->file)->i_size;
if (!count)
static ssize_t sysfs_kf_write(struct sysfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
- const struct sysfs_ops *ops = sysfs_file_ops(of->sd);
- struct kobject *kobj = of->sd->s_parent->priv;
+ const struct sysfs_ops *ops = sysfs_file_ops(of->kn);
+ struct kobject *kobj = of->kn->s_parent->priv;
if (!count)
return 0;
- return ops->store(kobj, of->sd->priv, buf, count);
+ return ops->store(kobj, of->kn->priv, buf, count);
}
/* kernfs write callback for bin sysfs files */
static ssize_t sysfs_kf_bin_write(struct sysfs_open_file *of, char *buf,
size_t count, loff_t pos)
{
- struct bin_attribute *battr = of->sd->priv;
- struct kobject *kobj = of->sd->s_parent->priv;
+ struct bin_attribute *battr = of->kn->priv;
+ struct kobject *kobj = of->kn->s_parent->priv;
loff_t size = file_inode(of->file)->i_size;
if (size) {
static int sysfs_kf_bin_mmap(struct sysfs_open_file *of,
struct vm_area_struct *vma)
{
- struct bin_attribute *battr = of->sd->priv;
- struct kobject *kobj = of->sd->s_parent->priv;
+ struct bin_attribute *battr = of->kn->priv;
+ struct kobject *kobj = of->kn->s_parent->priv;
return battr->mmap(of->file, kobj, battr, vma);
}
-void sysfs_notify(struct kobject *k, const char *dir, const char *attr)
+void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr)
{
- struct sysfs_dirent *sd = k->sd, *tmp;
+ struct kernfs_node *kn = kobj->sd, *tmp;
- if (sd && dir)
- sd = kernfs_find_and_get(sd, dir);
+ if (kn && dir)
+ kn = kernfs_find_and_get(kn, dir);
else
- kernfs_get(sd);
+ kernfs_get(kn);
- if (sd && attr) {
- tmp = kernfs_find_and_get(sd, attr);
- kernfs_put(sd);
- sd = tmp;
+ if (kn && attr) {
+ tmp = kernfs_find_and_get(kn, attr);
+ kernfs_put(kn);
+ kn = tmp;
}
- if (sd) {
- kernfs_notify(sd);
- kernfs_put(sd);
+ if (kn) {
+ kernfs_notify(kn);
+ kernfs_put(kn);
}
}
EXPORT_SYMBOL_GPL(sysfs_notify);
.mmap = sysfs_kf_bin_mmap,
};
-int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
+int sysfs_add_file_mode_ns(struct kernfs_node *parent,
const struct attribute *attr, bool is_bin,
umode_t mode, const void *ns)
{
struct lock_class_key *key = NULL;
const struct kernfs_ops *ops;
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
loff_t size;
if (!is_bin) {
- struct kobject *kobj = dir_sd->priv;
+ struct kobject *kobj = parent->priv;
const struct sysfs_ops *sysfs_ops = kobj->ktype->sysfs_ops;
/* every kobject with an attribute needs a ktype assigned */
if (!attr->ignore_lockdep)
key = attr->key ?: (struct lock_class_key *)&attr->skey;
#endif
- sd = kernfs_create_file_ns_key(dir_sd, attr->name, mode, size,
+ kn = kernfs_create_file_ns_key(parent, attr->name, mode, size,
ops, (void *)attr, ns, key);
- if (IS_ERR(sd)) {
- if (PTR_ERR(sd) == -EEXIST)
- sysfs_warn_dup(dir_sd, attr->name);
- return PTR_ERR(sd);
+ if (IS_ERR(kn)) {
+ if (PTR_ERR(kn) == -EEXIST)
+ sysfs_warn_dup(parent, attr->name);
+ return PTR_ERR(kn);
}
return 0;
}
-int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
+int sysfs_add_file(struct kernfs_node *parent, const struct attribute *attr,
bool is_bin)
{
- return sysfs_add_file_mode_ns(dir_sd, attr, is_bin, attr->mode, NULL);
+ return sysfs_add_file_mode_ns(parent, attr, is_bin, attr->mode, NULL);
}
/**
int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
- struct sysfs_dirent *dir_sd;
+ struct kernfs_node *parent;
int error;
if (group) {
- dir_sd = kernfs_find_and_get(kobj->sd, group);
+ parent = kernfs_find_and_get(kobj->sd, group);
} else {
- dir_sd = kobj->sd;
- kernfs_get(dir_sd);
+ parent = kobj->sd;
+ kernfs_get(parent);
}
- if (!dir_sd)
+ if (!parent)
return -ENOENT;
- error = sysfs_add_file(dir_sd, attr, false);
- kernfs_put(dir_sd);
+ error = sysfs_add_file(parent, attr, false);
+ kernfs_put(parent);
return error;
}
int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr,
umode_t mode)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
struct iattr newattrs;
int rc;
- sd = kernfs_find_and_get(kobj->sd, attr->name);
- if (!sd)
+ kn = kernfs_find_and_get(kobj->sd, attr->name);
+ if (!kn)
return -ENOENT;
- newattrs.ia_mode = (mode & S_IALLUGO) | (sd->s_mode & ~S_IALLUGO);
+ newattrs.ia_mode = (mode & S_IALLUGO) | (kn->s_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE;
- rc = kernfs_setattr(sd, &newattrs);
+ rc = kernfs_setattr(kn, &newattrs);
- kernfs_put(sd);
+ kernfs_put(kn);
return rc;
}
EXPORT_SYMBOL_GPL(sysfs_chmod_file);
void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr,
const void *ns)
{
- struct sysfs_dirent *dir_sd = kobj->sd;
+ struct kernfs_node *parent = kobj->sd;
- kernfs_remove_by_name_ns(dir_sd, attr->name, ns);
+ kernfs_remove_by_name_ns(parent, attr->name, ns);
}
EXPORT_SYMBOL_GPL(sysfs_remove_file_ns);
void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
- struct sysfs_dirent *dir_sd;
+ struct kernfs_node *parent;
if (group) {
- dir_sd = kernfs_find_and_get(kobj->sd, group);
+ parent = kernfs_find_and_get(kobj->sd, group);
} else {
- dir_sd = kobj->sd;
- kernfs_get(dir_sd);
+ parent = kobj->sd;
+ kernfs_get(parent);
}
- if (dir_sd) {
- kernfs_remove_by_name(dir_sd, attr->name);
- kernfs_put(dir_sd);
+ if (parent) {
+ kernfs_remove_by_name(parent, attr->name);
+ kernfs_put(parent);
}
}
EXPORT_SYMBOL_GPL(sysfs_remove_file_from_group);
#include "sysfs.h"
-static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
+static void remove_files(struct kernfs_node *parent, struct kobject *kobj,
const struct attribute_group *grp)
{
struct attribute *const *attr;
if (grp->attrs)
for (attr = grp->attrs; *attr; attr++)
- kernfs_remove_by_name(dir_sd, (*attr)->name);
+ kernfs_remove_by_name(parent, (*attr)->name);
if (grp->bin_attrs)
for (bin_attr = grp->bin_attrs; *bin_attr; bin_attr++)
sysfs_remove_bin_file(kobj, *bin_attr);
}
-static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
+static int create_files(struct kernfs_node *parent, struct kobject *kobj,
const struct attribute_group *grp, int update)
{
struct attribute *const *attr;
* re-adding (if required) the file.
*/
if (update)
- kernfs_remove_by_name(dir_sd, (*attr)->name);
+ kernfs_remove_by_name(parent, (*attr)->name);
if (grp->is_visible) {
mode = grp->is_visible(kobj, *attr, i);
if (!mode)
continue;
}
- error = sysfs_add_file_mode_ns(dir_sd, *attr, false,
+ error = sysfs_add_file_mode_ns(parent, *attr, false,
(*attr)->mode | mode,
NULL);
if (unlikely(error))
break;
}
if (error) {
- remove_files(dir_sd, kobj, grp);
+ remove_files(parent, kobj, grp);
goto exit;
}
}
break;
}
if (error)
- remove_files(dir_sd, kobj, grp);
+ remove_files(parent, kobj, grp);
}
exit:
return error;
static int internal_create_group(struct kobject *kobj, int update,
const struct attribute_group *grp)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
int error;
BUG_ON(!kobj || (!update && !kobj->sd));
return -EINVAL;
}
if (grp->name) {
- sd = kernfs_create_dir(kobj->sd, grp->name, kobj);
- if (IS_ERR(sd)) {
- if (PTR_ERR(sd) == -EEXIST)
+ kn = kernfs_create_dir(kobj->sd, grp->name, kobj);
+ if (IS_ERR(kn)) {
+ if (PTR_ERR(kn) == -EEXIST)
sysfs_warn_dup(kobj->sd, grp->name);
- return PTR_ERR(sd);
+ return PTR_ERR(kn);
}
} else
- sd = kobj->sd;
- kernfs_get(sd);
- error = create_files(sd, kobj, grp, update);
+ kn = kobj->sd;
+ kernfs_get(kn);
+ error = create_files(kn, kobj, grp, update);
if (error) {
if (grp->name)
- kernfs_remove(sd);
+ kernfs_remove(kn);
}
- kernfs_put(sd);
+ kernfs_put(kn);
return error;
}
void sysfs_remove_group(struct kobject *kobj,
const struct attribute_group *grp)
{
- struct sysfs_dirent *dir_sd = kobj->sd;
- struct sysfs_dirent *sd;
+ struct kernfs_node *parent = kobj->sd;
+ struct kernfs_node *kn;
if (grp->name) {
- sd = kernfs_find_and_get(dir_sd, grp->name);
- if (!sd) {
- WARN(!sd, KERN_WARNING
+ kn = kernfs_find_and_get(parent, grp->name);
+ if (!kn) {
+ WARN(!kn, KERN_WARNING
"sysfs group %p not found for kobject '%s'\n",
grp, kobject_name(kobj));
return;
}
} else {
- sd = dir_sd;
- kernfs_get(sd);
+ kn = parent;
+ kernfs_get(kn);
}
- remove_files(sd, kobj, grp);
+ remove_files(kn, kobj, grp);
if (grp->name)
- kernfs_remove(sd);
+ kernfs_remove(kn);
- kernfs_put(sd);
+ kernfs_put(kn);
}
EXPORT_SYMBOL_GPL(sysfs_remove_group);
int sysfs_merge_group(struct kobject *kobj,
const struct attribute_group *grp)
{
- struct sysfs_dirent *dir_sd;
+ struct kernfs_node *parent;
int error = 0;
struct attribute *const *attr;
int i;
- dir_sd = kernfs_find_and_get(kobj->sd, grp->name);
- if (!dir_sd)
+ parent = kernfs_find_and_get(kobj->sd, grp->name);
+ if (!parent)
return -ENOENT;
for ((i = 0, attr = grp->attrs); *attr && !error; (++i, ++attr))
- error = sysfs_add_file(dir_sd, *attr, false);
+ error = sysfs_add_file(parent, *attr, false);
if (error) {
while (--i >= 0)
- kernfs_remove_by_name(dir_sd, (*--attr)->name);
+ kernfs_remove_by_name(parent, (*--attr)->name);
}
- kernfs_put(dir_sd);
+ kernfs_put(parent);
return error;
}
void sysfs_unmerge_group(struct kobject *kobj,
const struct attribute_group *grp)
{
- struct sysfs_dirent *dir_sd;
+ struct kernfs_node *parent;
struct attribute *const *attr;
- dir_sd = kernfs_find_and_get(kobj->sd, grp->name);
- if (dir_sd) {
+ parent = kernfs_find_and_get(kobj->sd, grp->name);
+ if (parent) {
for (attr = grp->attrs; *attr; ++attr)
- kernfs_remove_by_name(dir_sd, (*attr)->name);
- kernfs_put(dir_sd);
+ kernfs_remove_by_name(parent, (*attr)->name);
+ kernfs_put(parent);
}
}
EXPORT_SYMBOL_GPL(sysfs_unmerge_group);
int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name,
struct kobject *target, const char *link_name)
{
- struct sysfs_dirent *dir_sd;
+ struct kernfs_node *parent;
int error = 0;
- dir_sd = kernfs_find_and_get(kobj->sd, group_name);
- if (!dir_sd)
+ parent = kernfs_find_and_get(kobj->sd, group_name);
+ if (!parent)
return -ENOENT;
- error = sysfs_create_link_sd(dir_sd, target, link_name);
- kernfs_put(dir_sd);
+ error = sysfs_create_link_sd(parent, target, link_name);
+ kernfs_put(parent);
return error;
}
void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name,
const char *link_name)
{
- struct sysfs_dirent *dir_sd;
+ struct kernfs_node *parent;
- dir_sd = kernfs_find_and_get(kobj->sd, group_name);
- if (dir_sd) {
- kernfs_remove_by_name(dir_sd, link_name);
- kernfs_put(dir_sd);
+ parent = kernfs_find_and_get(kobj->sd, group_name);
+ if (parent) {
+ kernfs_remove_by_name(parent, link_name);
+ kernfs_put(parent);
}
}
EXPORT_SYMBOL_GPL(sysfs_remove_link_from_group);
#include "sysfs.h"
static struct kernfs_root *sysfs_root;
-struct sysfs_dirent *sysfs_root_sd;
+struct kernfs_node *sysfs_root_kn;
static struct dentry *sysfs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
if (IS_ERR(sysfs_root))
return PTR_ERR(sysfs_root);
- sysfs_root_sd = sysfs_root->sd;
+ sysfs_root_kn = sysfs_root->kn;
err = register_filesystem(&sysfs_fs_type);
if (err) {
#include "sysfs.h"
-static int sysfs_do_create_link_sd(struct sysfs_dirent *parent_sd,
- struct kobject *target,
+static int sysfs_do_create_link_sd(struct kernfs_node *parent,
+ struct kobject *target_kobj,
const char *name, int warn)
{
- struct sysfs_dirent *sd, *target_sd = NULL;
+ struct kernfs_node *kn, *target = NULL;
- BUG_ON(!name || !parent_sd);
+ BUG_ON(!name || !parent);
/*
- * We don't own @target and it may be removed at any time.
+ * We don't own @target_kobj and it may be removed at any time.
* Synchronize using sysfs_symlink_target_lock. See
* sysfs_remove_dir() for details.
*/
spin_lock(&sysfs_symlink_target_lock);
- if (target->sd) {
- target_sd = target->sd;
- kernfs_get(target_sd);
+ if (target_kobj->sd) {
+ target = target_kobj->sd;
+ kernfs_get(target);
}
spin_unlock(&sysfs_symlink_target_lock);
- if (!target_sd)
+ if (!target)
return -ENOENT;
- sd = kernfs_create_link(parent_sd, name, target_sd);
- kernfs_put(target_sd);
+ kn = kernfs_create_link(parent, name, target);
+ kernfs_put(target);
- if (!IS_ERR(sd))
+ if (!IS_ERR(kn))
return 0;
- if (warn && PTR_ERR(sd) == -EEXIST)
- sysfs_warn_dup(parent_sd, name);
- return PTR_ERR(sd);
+ if (warn && PTR_ERR(kn) == -EEXIST)
+ sysfs_warn_dup(parent, name);
+ return PTR_ERR(kn);
}
/**
* sysfs_create_link_sd - create symlink to a given object.
- * @sd: directory we're creating the link in.
+ * @kn: directory we're creating the link in.
* @target: object we're pointing to.
* @name: name of the symlink.
*/
-int sysfs_create_link_sd(struct sysfs_dirent *sd, struct kobject *target,
+int sysfs_create_link_sd(struct kernfs_node *kn, struct kobject *target,
const char *name)
{
- return sysfs_do_create_link_sd(sd, target, name, 1);
+ return sysfs_do_create_link_sd(kn, target, name, 1);
}
static int sysfs_do_create_link(struct kobject *kobj, struct kobject *target,
const char *name, int warn)
{
- struct sysfs_dirent *parent_sd = NULL;
+ struct kernfs_node *parent = NULL;
if (!kobj)
- parent_sd = sysfs_root_sd;
+ parent = sysfs_root_kn;
else
- parent_sd = kobj->sd;
+ parent = kobj->sd;
- if (!parent_sd)
+ if (!parent)
return -EFAULT;
- return sysfs_do_create_link_sd(parent_sd, target, name, warn);
+ return sysfs_do_create_link_sd(parent, target, name, warn);
}
/**
*/
void sysfs_remove_link(struct kobject *kobj, const char *name)
{
- struct sysfs_dirent *parent_sd = NULL;
+ struct kernfs_node *parent = NULL;
if (!kobj)
- parent_sd = sysfs_root_sd;
+ parent = sysfs_root_kn;
else
- parent_sd = kobj->sd;
+ parent = kobj->sd;
- kernfs_remove_by_name(parent_sd, name);
+ kernfs_remove_by_name(parent, name);
}
EXPORT_SYMBOL_GPL(sysfs_remove_link);
int sysfs_rename_link_ns(struct kobject *kobj, struct kobject *targ,
const char *old, const char *new, const void *new_ns)
{
- struct sysfs_dirent *parent_sd, *sd = NULL;
+ struct kernfs_node *parent, *kn = NULL;
const void *old_ns = NULL;
int result;
if (!kobj)
- parent_sd = sysfs_root_sd;
+ parent = sysfs_root_kn;
else
- parent_sd = kobj->sd;
+ parent = kobj->sd;
if (targ->sd)
old_ns = targ->sd->s_ns;
result = -ENOENT;
- sd = kernfs_find_and_get_ns(parent_sd, old, old_ns);
- if (!sd)
+ kn = kernfs_find_and_get_ns(parent, old, old_ns);
+ if (!kn)
goto out;
result = -EINVAL;
- if (sysfs_type(sd) != SYSFS_KOBJ_LINK)
+ if (sysfs_type(kn) != SYSFS_KOBJ_LINK)
goto out;
- if (sd->s_symlink.target_sd->priv != targ)
+ if (kn->s_symlink.target_kn->priv != targ)
goto out;
- result = kernfs_rename_ns(sd, parent_sd, new, new_ns);
+ result = kernfs_rename_ns(kn, parent, new, new_ns);
out:
- kernfs_put(sd);
+ kernfs_put(kn);
return result;
}
EXPORT_SYMBOL_GPL(sysfs_rename_link_ns);
/*
* mount.c
*/
-extern struct sysfs_dirent *sysfs_root_sd;
+extern struct kernfs_node *sysfs_root_kn;
/*
* dir.c
*/
extern spinlock_t sysfs_symlink_target_lock;
-void sysfs_warn_dup(struct sysfs_dirent *parent, const char *name);
+void sysfs_warn_dup(struct kernfs_node *parent, const char *name);
/*
* file.c
*/
-int sysfs_add_file(struct sysfs_dirent *dir_sd,
+int sysfs_add_file(struct kernfs_node *parent,
const struct attribute *attr, bool is_bin);
-int sysfs_add_file_mode_ns(struct sysfs_dirent *dir_sd,
+int sysfs_add_file_mode_ns(struct kernfs_node *parent,
const struct attribute *attr, bool is_bin,
umode_t amode, const void *ns);
/*
* symlink.c
*/
-int sysfs_create_link_sd(struct sysfs_dirent *sd, struct kobject *target,
+int sysfs_create_link_sd(struct kernfs_node *kn, struct kobject *target,
const char *name);
#endif /* __SYSFS_INTERNAL_H */
SYSFS_FLAG_LOCKDEP = 0x0100,
};
-/* type-specific structures for sysfs_dirent->s_* union members */
-struct sysfs_elem_dir {
+/* type-specific structures for kernfs_node union members */
+struct kernfs_elem_dir {
unsigned long subdirs;
- /* children rbtree starts here and goes through sd->s_rb */
+ /* children rbtree starts here and goes through kn->s_rb */
struct rb_root children;
/*
* The kernfs hierarchy this directory belongs to. This fits
- * better directly in sysfs_dirent but is here to save space.
+ * better directly in kernfs_node but is here to save space.
*/
struct kernfs_root *root;
};
-struct sysfs_elem_symlink {
- struct sysfs_dirent *target_sd;
+struct kernfs_elem_symlink {
+ struct kernfs_node *target_kn;
};
-struct sysfs_elem_attr {
+struct kernfs_elem_attr {
const struct kernfs_ops *ops;
struct sysfs_open_dirent *open;
loff_t size;
};
/*
- * sysfs_dirent - the building block of sysfs hierarchy. Each and every
- * sysfs node is represented by single sysfs_dirent. Most fields are
+ * kernfs_node - the building block of kernfs hierarchy. Each and every
+ * kernfs node is represented by single kernfs_node. Most fields are
* private to kernfs and shouldn't be accessed directly by kernfs users.
*
- * As long as s_count reference is held, the sysfs_dirent itself is
- * accessible. Dereferencing s_elem or any other outer entity
- * requires s_active reference.
+ * As long as s_count reference is held, the kernfs_node itself is
+ * accessible. Dereferencing elem or any other outer entity requires
+ * active reference.
*/
-struct sysfs_dirent {
+struct kernfs_node {
atomic_t s_count;
atomic_t s_active;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
#endif
/* the following two fields are published */
- struct sysfs_dirent *s_parent;
+ struct kernfs_node *s_parent;
const char *s_name;
struct rb_node s_rb;
union {
struct completion *completion;
- struct sysfs_dirent *removed_list;
+ struct kernfs_node *removed_list;
} u;
const void *s_ns; /* namespace tag */
unsigned int s_hash; /* ns + name hash */
union {
- struct sysfs_elem_dir s_dir;
- struct sysfs_elem_symlink s_symlink;
- struct sysfs_elem_attr s_attr;
+ struct kernfs_elem_dir s_dir;
+ struct kernfs_elem_symlink s_symlink;
+ struct kernfs_elem_attr s_attr;
};
void *priv;
struct kernfs_root {
/* published fields */
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
/* private fields, do not use outside kernfs proper */
struct ida ino_ida;
struct sysfs_open_file {
/* published fields */
- struct sysfs_dirent *sd;
+ struct kernfs_node *kn;
struct file *file;
/* private fields, do not use outside kernfs proper */
#ifdef CONFIG_SYSFS
-static inline enum kernfs_node_type sysfs_type(struct sysfs_dirent *sd)
+static inline enum kernfs_node_type sysfs_type(struct kernfs_node *kn)
{
- return sd->s_flags & SYSFS_TYPE_MASK;
+ return kn->s_flags & SYSFS_TYPE_MASK;
}
/**
* kernfs_enable_ns - enable namespace under a directory
- * @sd: directory of interest, should be empty
+ * @kn: directory of interest, should be empty
*
- * This is to be called right after @sd is created to enable namespace
- * under it. All children of @sd must have non-NULL namespace tags and
+ * This is to be called right after @kn is created to enable namespace
+ * under it. All children of @kn must have non-NULL namespace tags and
* only the ones which match the super_block's tag will be visible.
*/
-static inline void kernfs_enable_ns(struct sysfs_dirent *sd)
+static inline void kernfs_enable_ns(struct kernfs_node *kn)
{
- WARN_ON_ONCE(sysfs_type(sd) != SYSFS_DIR);
- WARN_ON_ONCE(!RB_EMPTY_ROOT(&sd->s_dir.children));
- sd->s_flags |= SYSFS_FLAG_NS;
+ WARN_ON_ONCE(sysfs_type(kn) != SYSFS_DIR);
+ WARN_ON_ONCE(!RB_EMPTY_ROOT(&kn->s_dir.children));
+ kn->s_flags |= SYSFS_FLAG_NS;
}
/**
* kernfs_ns_enabled - test whether namespace is enabled
- * @sd: the node to test
+ * @kn: the node to test
*
* Test whether namespace filtering is enabled for the children of @ns.
*/
-static inline bool kernfs_ns_enabled(struct sysfs_dirent *sd)
+static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
{
- return sd->s_flags & SYSFS_FLAG_NS;
+ return kn->s_flags & SYSFS_FLAG_NS;
}
-struct sysfs_dirent *kernfs_find_and_get_ns(struct sysfs_dirent *parent,
- const char *name, const void *ns);
-void kernfs_get(struct sysfs_dirent *sd);
-void kernfs_put(struct sysfs_dirent *sd);
+struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,
+ const char *name, const void *ns);
+void kernfs_get(struct kernfs_node *kn);
+void kernfs_put(struct kernfs_node *kn);
struct kernfs_root *kernfs_create_root(void *priv);
void kernfs_destroy_root(struct kernfs_root *root);
-struct sysfs_dirent *kernfs_create_dir_ns(struct sysfs_dirent *parent,
- const char *name, void *priv,
- const void *ns);
-struct sysfs_dirent *kernfs_create_file_ns_key(struct sysfs_dirent *parent,
- const char *name,
- umode_t mode, loff_t size,
- const struct kernfs_ops *ops,
- void *priv, const void *ns,
- struct lock_class_key *key);
-struct sysfs_dirent *kernfs_create_link(struct sysfs_dirent *parent,
- const char *name,
- struct sysfs_dirent *target);
-void kernfs_remove(struct sysfs_dirent *sd);
-int kernfs_remove_by_name_ns(struct sysfs_dirent *parent, const char *name,
+struct kernfs_node *kernfs_create_dir_ns(struct kernfs_node *parent,
+ const char *name, void *priv,
+ const void *ns);
+struct kernfs_node *kernfs_create_file_ns_key(struct kernfs_node *parent,
+ const char *name,
+ umode_t mode, loff_t size,
+ const struct kernfs_ops *ops,
+ void *priv, const void *ns,
+ struct lock_class_key *key);
+struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
+ const char *name,
+ struct kernfs_node *target);
+void kernfs_remove(struct kernfs_node *kn);
+int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
const void *ns);
-int kernfs_rename_ns(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent,
+int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
const char *new_name, const void *new_ns);
-int kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr);
-void kernfs_notify(struct sysfs_dirent *sd);
+int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr);
+void kernfs_notify(struct kernfs_node *kn);
const void *kernfs_super_ns(struct super_block *sb);
struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags,
#else /* CONFIG_SYSFS */
-static inline enum kernfs_node_type sysfs_type(struct sysfs_dirent *sd)
+static inline enum kernfs_node_type sysfs_type(struct kernfs_node *kn)
{ return 0; } /* whatever */
-static inline void kernfs_enable_ns(struct sysfs_dirent *sd) { }
+static inline void kernfs_enable_ns(struct kernfs_node *kn) { }
-static inline bool kernfs_ns_enabled(struct sysfs_dirent *sd)
+static inline bool kernfs_ns_enabled(struct kernfs_node *kn)
{ return false; }
-static inline struct sysfs_dirent *
-kernfs_find_and_get_ns(struct sysfs_dirent *parent, const char *name,
+static inline struct kernfs_node *
+kernfs_find_and_get_ns(struct kernfs_node *parent, const char *name,
const void *ns)
{ return NULL; }
-static inline void kernfs_get(struct sysfs_dirent *sd) { }
-static inline void kernfs_put(struct sysfs_dirent *sd) { }
+static inline void kernfs_get(struct kernfs_node *kn) { }
+static inline void kernfs_put(struct kernfs_node *kn) { }
static inline struct kernfs_root *kernfs_create_root(void *priv)
{ return ERR_PTR(-ENOSYS); }
static inline void kernfs_destroy_root(struct kernfs_root *root) { }
-static inline struct sysfs_dirent *
-kernfs_create_dir_ns(struct sysfs_dirent *parent, const char *name, void *priv,
+static inline struct kernfs_node *
+kernfs_create_dir_ns(struct kernfs_node *parent, const char *name, void *priv,
const void *ns)
{ return ERR_PTR(-ENOSYS); }
-static inline struct sysfs_dirent *
-kernfs_create_file_ns_key(struct sysfs_dirent *parent, const char *name,
+static inline struct kernfs_node *
+kernfs_create_file_ns_key(struct kernfs_node *parent, const char *name,
umode_t mode, loff_t size,
const struct kernfs_ops *ops, void *priv,
const void *ns, struct lock_class_key *key)
{ return ERR_PTR(-ENOSYS); }
-static inline struct sysfs_dirent *
-kernfs_create_link(struct sysfs_dirent *parent, const char *name,
- struct sysfs_dirent *target)
+static inline struct kernfs_node *
+kernfs_create_link(struct kernfs_node *parent, const char *name,
+ struct kernfs_node *target)
{ return ERR_PTR(-ENOSYS); }
-static inline void kernfs_remove(struct sysfs_dirent *sd) { }
+static inline void kernfs_remove(struct kernfs_node *kn) { }
-static inline int kernfs_remove_by_name_ns(struct sysfs_dirent *parent,
+static inline int kernfs_remove_by_name_ns(struct kernfs_node *kn,
const char *name, const void *ns)
{ return -ENOSYS; }
-static inline int kernfs_rename_ns(struct sysfs_dirent *sd,
- struct sysfs_dirent *new_parent,
+static inline int kernfs_rename_ns(struct kernfs_node *kn,
+ struct kernfs_node *new_parent,
const char *new_name, const void *new_ns)
{ return -ENOSYS; }
-static inline int kernfs_setattr(struct sysfs_dirent *sd,
+static inline int kernfs_setattr(struct kernfs_node *kn,
const struct iattr *iattr)
{ return -ENOSYS; }
-static inline void kernfs_notify(struct sysfs_dirent *sd) { }
+static inline void kernfs_notify(struct kernfs_node *kn) { }
static inline const void *kernfs_super_ns(struct super_block *sb)
{ return NULL; }
#endif /* CONFIG_SYSFS */
-static inline struct sysfs_dirent *
-kernfs_find_and_get(struct sysfs_dirent *sd, const char *name)
+static inline struct kernfs_node *
+kernfs_find_and_get(struct kernfs_node *kn, const char *name)
{
- return kernfs_find_and_get_ns(sd, name, NULL);
+ return kernfs_find_and_get_ns(kn, name, NULL);
}
-static inline struct sysfs_dirent *
-kernfs_create_dir(struct sysfs_dirent *parent, const char *name, void *priv)
+static inline struct kernfs_node *
+kernfs_create_dir(struct kernfs_node *parent, const char *name, void *priv)
{
return kernfs_create_dir_ns(parent, name, priv, NULL);
}
-static inline struct sysfs_dirent *
-kernfs_create_file_ns(struct sysfs_dirent *parent, const char *name,
+static inline struct kernfs_node *
+kernfs_create_file_ns(struct kernfs_node *parent, const char *name,
umode_t mode, loff_t size, const struct kernfs_ops *ops,
void *priv, const void *ns)
{
ns, key);
}
-static inline struct sysfs_dirent *
-kernfs_create_file(struct sysfs_dirent *parent, const char *name, umode_t mode,
+static inline struct kernfs_node *
+kernfs_create_file(struct kernfs_node *parent, const char *name, umode_t mode,
loff_t size, const struct kernfs_ops *ops, void *priv)
{
return kernfs_create_file_ns(parent, name, mode, size, ops, priv, NULL);
}
-static inline int kernfs_remove_by_name(struct sysfs_dirent *parent,
+static inline int kernfs_remove_by_name(struct kernfs_node *parent,
const char *name)
{
return kernfs_remove_by_name_ns(parent, name, NULL);
struct kobject *parent;
struct kset *kset;
struct kobj_type *ktype;
- struct sysfs_dirent *sd;
+ struct kernfs_node *sd;
struct kref kref;
#ifdef CONFIG_DEBUG_KOBJECT_RELEASE
struct delayed_work release;
return sysfs_rename_link_ns(kobj, target, old_name, new_name, NULL);
}
-static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)
+static inline void sysfs_notify_dirent(struct kernfs_node *kn)
{
- kernfs_notify(sd);
+ kernfs_notify(kn);
}
-static inline struct sysfs_dirent *
-sysfs_get_dirent(struct sysfs_dirent *parent_sd, const unsigned char *name)
+static inline struct kernfs_node *sysfs_get_dirent(struct kernfs_node *parent,
+ const unsigned char *name)
{
- return kernfs_find_and_get(parent_sd, name);
+ return kernfs_find_and_get(parent, name);
}
-static inline struct sysfs_dirent *sysfs_get(struct sysfs_dirent *sd)
+static inline struct kernfs_node *sysfs_get(struct kernfs_node *kn)
{
- kernfs_get(sd);
- return sd;
+ kernfs_get(kn);
+ return kn;
}
-static inline void sysfs_put(struct sysfs_dirent *sd)
+static inline void sysfs_put(struct kernfs_node *kn)
{
- kernfs_put(sd);
+ kernfs_put(kn);
}
#endif /* _SYSFS_H_ */
*/
void kobject_del(struct kobject *kobj)
{
- struct sysfs_dirent *sd;
+ struct kernfs_node *sd;
if (!kobj)
return;
projects / linux-beck.git / commitdiff