aboutsummaryrefslogtreecommitdiffstats
path: root/fs/kernfs/inode.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/kernfs/inode.c')
-rw-r--r--fs/kernfs/inode.c123
1 files changed, 62 insertions, 61 deletions
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 18ad431e8c2a..9e74eed63539 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -46,36 +46,36 @@ void __init sysfs_inode_init(void)
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;
@@ -93,24 +93,24 @@ static int __kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr)
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;
}
@@ -118,10 +118,10 @@ int kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr)
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);
@@ -129,7 +129,7 @@ int sysfs_setattr(struct dentry *dentry, struct iattr *iattr)
if (error)
goto out;
- error = __kernfs_setattr(sd, iattr);
+ error = __kernfs_setattr(kn, iattr);
if (error)
goto out;
@@ -141,14 +141,14 @@ 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;
@@ -166,13 +166,13 @@ static int sysfs_sd_setsecdata(struct sysfs_dirent *sd, void **secdata,
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;
@@ -188,7 +188,7 @@ int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
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)
@@ -204,10 +204,10 @@ int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value,
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;
@@ -217,10 +217,10 @@ int sysfs_removexattr(struct dentry *dentry, const char *name)
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;
@@ -229,10 +229,10 @@ ssize_t sysfs_getxattr(struct dentry *dentry, const char *name, void *buf,
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;
@@ -254,57 +254,58 @@ static inline void set_inode_attr(struct inode *inode, struct iattr *iattr)
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:
@@ -318,13 +319,13 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
}
/**
- * 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).
@@ -332,44 +333,44 @@ static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
* 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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.