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-rw-r--r--fs/sysfs/inode.c249
1 files changed, 0 insertions, 249 deletions
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
deleted file mode 100644
index 970a33f0329..00000000000
--- a/fs/sysfs/inode.c
+++ /dev/null
@@ -1,249 +0,0 @@
-/*
- * inode.c - basic inode and dentry operations.
- *
- * sysfs is Copyright (c) 2001-3 Patrick Mochel
- *
- * Please see Documentation/filesystems/sysfs.txt for more information.
- */
-
-#undef DEBUG
-
-#include <linux/pagemap.h>
-#include <linux/namei.h>
-#include <linux/backing-dev.h>
-#include "sysfs.h"
-
-extern struct super_block * sysfs_sb;
-
-static struct address_space_operations sysfs_aops = {
- .readpage = simple_readpage,
- .prepare_write = simple_prepare_write,
- .commit_write = simple_commit_write
-};
-
-static struct backing_dev_info sysfs_backing_dev_info = {
- .ra_pages = 0, /* No readahead */
- .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
-};
-
-static struct inode_operations sysfs_inode_operations ={
- .setattr = sysfs_setattr,
-};
-
-int sysfs_setattr(struct dentry * dentry, struct iattr * iattr)
-{
- struct inode * inode = dentry->d_inode;
- struct sysfs_dirent * sd = dentry->d_fsdata;
- struct iattr * sd_iattr;
- unsigned int ia_valid = iattr->ia_valid;
- int error;
-
- if (!sd)
- return -EINVAL;
-
- sd_iattr = sd->s_iattr;
-
- error = inode_change_ok(inode, iattr);
- if (error)
- return error;
-
- error = inode_setattr(inode, iattr);
- if (error)
- return error;
-
- if (!sd_iattr) {
- /* setting attributes for the first time, allocate now */
- sd_iattr = kmalloc(sizeof(struct iattr), GFP_KERNEL);
- if (!sd_iattr)
- return -ENOMEM;
- /* assign default attributes */
- memset(sd_iattr, 0, sizeof(struct iattr));
- sd_iattr->ia_mode = sd->s_mode;
- sd_iattr->ia_uid = 0;
- sd_iattr->ia_gid = 0;
- sd_iattr->ia_atime = sd_iattr->ia_mtime = sd_iattr->ia_ctime = CURRENT_TIME;
- sd->s_iattr = sd_iattr;
- }
-
- /* attributes were changed atleast once in past */
-
- if (ia_valid & ATTR_UID)
- sd_iattr->ia_uid = iattr->ia_uid;
- if (ia_valid & ATTR_GID)
- sd_iattr->ia_gid = iattr->ia_gid;
- if (ia_valid & ATTR_ATIME)
- sd_iattr->ia_atime = timespec_trunc(iattr->ia_atime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_MTIME)
- sd_iattr->ia_mtime = timespec_trunc(iattr->ia_mtime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_CTIME)
- sd_iattr->ia_ctime = timespec_trunc(iattr->ia_ctime,
- inode->i_sb->s_time_gran);
- if (ia_valid & ATTR_MODE) {
- umode_t mode = iattr->ia_mode;
-
- if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
- mode &= ~S_ISGID;
- sd_iattr->ia_mode = sd->s_mode = mode;
- }
-
- return error;
-}
-
-static inline void set_default_inode_attr(struct inode * inode, mode_t mode)
-{
- inode->i_mode = mode;
- inode->i_uid = 0;
- inode->i_gid = 0;
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
-}
-
-static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
-{
- inode->i_mode = iattr->ia_mode;
- inode->i_uid = iattr->ia_uid;
- inode->i_gid = iattr->ia_gid;
- inode->i_atime = iattr->ia_atime;
- inode->i_mtime = iattr->ia_mtime;
- inode->i_ctime = iattr->ia_ctime;
-}
-
-struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent * sd)
-{
- struct inode * inode = new_inode(sysfs_sb);
- if (inode) {
- inode->i_blksize = PAGE_CACHE_SIZE;
- inode->i_blocks = 0;
- inode->i_mapping->a_ops = &sysfs_aops;
- inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
- inode->i_op = &sysfs_inode_operations;
-
- if (sd->s_iattr) {
- /* sysfs_dirent has non-default attributes
- * get them for the new inode from persistent copy
- * in sysfs_dirent
- */
- set_inode_attr(inode, sd->s_iattr);
- } else
- set_default_inode_attr(inode, mode);
- }
- return inode;
-}
-
-int sysfs_create(struct dentry * dentry, int mode, int (*init)(struct inode *))
-{
- int error = 0;
- struct inode * inode = NULL;
- if (dentry) {
- if (!dentry->d_inode) {
- struct sysfs_dirent * sd = dentry->d_fsdata;
- if ((inode = sysfs_new_inode(mode, sd))) {
- if (dentry->d_parent && dentry->d_parent->d_inode) {
- struct inode *p_inode = dentry->d_parent->d_inode;
- p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME;
- }
- goto Proceed;
- }
- else
- error = -ENOMEM;
- } else
- error = -EEXIST;
- } else
- error = -ENOENT;
- goto Done;
-
- Proceed:
- if (init)
- error = init(inode);
- if (!error) {
- d_instantiate(dentry, inode);
- if (S_ISDIR(mode))
- dget(dentry); /* pin only directory dentry in core */
- } else
- iput(inode);
- Done:
- return error;
-}
-
-/*
- * Get the name for corresponding element represented by the given sysfs_dirent
- */
-const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)
-{
- struct attribute * attr;
- struct bin_attribute * bin_attr;
- struct sysfs_symlink * sl;
-
- if (!sd || !sd->s_element)
- BUG();
-
- switch (sd->s_type) {
- case SYSFS_DIR:
- /* Always have a dentry so use that */
- return sd->s_dentry->d_name.name;
-
- case SYSFS_KOBJ_ATTR:
- attr = sd->s_element;
- return attr->name;
-
- case SYSFS_KOBJ_BIN_ATTR:
- bin_attr = sd->s_element;
- return bin_attr->attr.name;
-
- case SYSFS_KOBJ_LINK:
- sl = sd->s_element;
- return sl->link_name;
- }
- return NULL;
-}
-
-
-/*
- * Unhashes the dentry corresponding to given sysfs_dirent
- * Called with parent inode's i_sem held.
- */
-void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent)
-{
- struct dentry * dentry = sd->s_dentry;
-
- if (dentry) {
- spin_lock(&dcache_lock);
- spin_lock(&dentry->d_lock);
- if (!(d_unhashed(dentry) && dentry->d_inode)) {
- dget_locked(dentry);
- __d_drop(dentry);
- spin_unlock(&dentry->d_lock);
- spin_unlock(&dcache_lock);
- simple_unlink(parent->d_inode, dentry);
- } else {
- spin_unlock(&dentry->d_lock);
- spin_unlock(&dcache_lock);
- }
- }
-}
-
-void sysfs_hash_and_remove(struct dentry * dir, const char * name)
-{
- struct sysfs_dirent * sd;
- struct sysfs_dirent * parent_sd = dir->d_fsdata;
-
- if (dir->d_inode == NULL)
- /* no inode means this hasn't been made visible yet */
- return;
-
- down(&dir->d_inode->i_sem);
- list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
- if (!sd->s_element)
- continue;
- if (!strcmp(sysfs_get_name(sd), name)) {
- list_del_init(&sd->s_sibling);
- sysfs_drop_dentry(sd, dir);
- sysfs_put(sd);
- break;
- }
- }
- up(&dir->d_inode->i_sem);
-}
-
-
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 23:30:58 +0000