return rv;
}
-static ssize_t
-proc_file_write(struct file *file, const char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct proc_dir_entry *pde = PDE(file_inode(file));
- ssize_t rv = -EIO;
-
- if (pde->write_proc) {
- spin_lock(&pde->pde_unload_lock);
- if (!pde->proc_fops) {
- spin_unlock(&pde->pde_unload_lock);
- return rv;
- }
- pde->pde_users++;
- spin_unlock(&pde->pde_unload_lock);
-
- /* FIXME: does this routine need ppos? probably... */
- rv = pde->write_proc(file, buffer, count, pde->data);
- pde_users_dec(pde);
- }
- return rv;
-}
-
-
static loff_t
proc_file_lseek(struct file *file, loff_t offset, int orig)
{
static const struct file_operations proc_file_operations = {
.llseek = proc_file_lseek,
.read = proc_file_read,
- .write = proc_file_write,
};
static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
static void *proc_follow_link(struct dentry *dentry, struct nameidata *nd)
{
- nd_set_link(nd, PDE(dentry->d_inode)->data);
+ nd_set_link(nd, PDE_DATA(dentry->d_inode));
return NULL;
}
return ret;
if (S_ISDIR(dp->mode)) {
- if (dp->proc_iops == NULL) {
- dp->proc_fops = &proc_dir_operations;
- dp->proc_iops = &proc_dir_inode_operations;
- }
+ dp->proc_fops = &proc_dir_operations;
+ dp->proc_iops = &proc_dir_inode_operations;
dir->nlink++;
} else if (S_ISLNK(dp->mode)) {
- if (dp->proc_iops == NULL)
- dp->proc_iops = &proc_link_inode_operations;
+ dp->proc_iops = &proc_link_inode_operations;
} else if (S_ISREG(dp->mode)) {
if (dp->proc_fops == NULL)
dp->proc_fops = &proc_file_operations;
- if (dp->proc_iops == NULL)
- dp->proc_iops = &proc_file_inode_operations;
+ dp->proc_iops = &proc_file_inode_operations;
+ } else {
+ WARN_ON(1);
+ return -EINVAL;
}
spin_lock(&proc_subdir_lock);
struct proc_dir_entry *parent)
{
struct proc_dir_entry *ent;
- nlink_t nlink;
- if (S_ISDIR(mode)) {
- if ((mode & S_IALLUGO) == 0)
- mode |= S_IRUGO | S_IXUGO;
- nlink = 2;
- } else {
- if ((mode & S_IFMT) == 0)
- mode |= S_IFREG;
- if ((mode & S_IALLUGO) == 0)
- mode |= S_IRUGO;
- nlink = 1;
+ if ((mode & S_IFMT) == 0)
+ mode |= S_IFREG;
+
+ if (!S_ISREG(mode)) {
+ WARN_ON(1); /* use proc_mkdir(), damnit */
+ return NULL;
}
- ent = __proc_create(&parent, name, mode, nlink);
+ if ((mode & S_IALLUGO) == 0)
+ mode |= S_IRUGO;
+
+ ent = __proc_create(&parent, name, mode, 1);
if (ent) {
if (proc_register(parent, ent) < 0) {
kfree(ent);
void *data)
{
struct proc_dir_entry *pde;
- nlink_t nlink;
+ if ((mode & S_IFMT) == 0)
+ mode |= S_IFREG;
- if (S_ISDIR(mode)) {
- if ((mode & S_IALLUGO) == 0)
- mode |= S_IRUGO | S_IXUGO;
- nlink = 2;
- } else {
- if ((mode & S_IFMT) == 0)
- mode |= S_IFREG;
- if ((mode & S_IALLUGO) == 0)
- mode |= S_IRUGO;
- nlink = 1;
+ if (!S_ISREG(mode)) {
+ WARN_ON(1); /* use proc_mkdir() */
+ return NULL;
}
- pde = __proc_create(&parent, name, mode, nlink);
+ if ((mode & S_IALLUGO) == 0)
+ mode |= S_IRUGO;
+ pde = __proc_create(&parent, name, mode, 1);
if (!pde)
goto out;
pde->proc_fops = proc_fops;
free_proc_entry(pde);
}
-/*
- * Remove a /proc entry and free it if it's not currently in use.
- */
-void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
+static void entry_rundown(struct proc_dir_entry *de)
{
- struct proc_dir_entry **p;
- struct proc_dir_entry *de = NULL;
- const char *fn = name;
- unsigned int len;
-
- spin_lock(&proc_subdir_lock);
- if (__xlate_proc_name(name, &parent, &fn) != 0) {
- spin_unlock(&proc_subdir_lock);
- return;
- }
- len = strlen(fn);
-
- for (p = &parent->subdir; *p; p=&(*p)->next ) {
- if (proc_match(len, fn, *p)) {
- de = *p;
- *p = de->next;
- de->next = NULL;
- break;
- }
- }
- spin_unlock(&proc_subdir_lock);
- if (!de) {
- WARN(1, "name '%s'\n", name);
- return;
- }
-
spin_lock(&de->pde_unload_lock);
/*
* Stop accepting new callers into module. If you're
spin_lock(&de->pde_unload_lock);
}
spin_unlock(&de->pde_unload_lock);
+}
+
+/*
+ * Remove a /proc entry and free it if it's not currently in use.
+ */
+void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
+{
+ struct proc_dir_entry **p;
+ struct proc_dir_entry *de = NULL;
+ const char *fn = name;
+ unsigned int len;
+
+ spin_lock(&proc_subdir_lock);
+ if (__xlate_proc_name(name, &parent, &fn) != 0) {
+ spin_unlock(&proc_subdir_lock);
+ return;
+ }
+ len = strlen(fn);
+
+ for (p = &parent->subdir; *p; p=&(*p)->next ) {
+ if (proc_match(len, fn, *p)) {
+ de = *p;
+ *p = de->next;
+ de->next = NULL;
+ break;
+ }
+ }
+ spin_unlock(&proc_subdir_lock);
+ if (!de) {
+ WARN(1, "name '%s'\n", name);
+ return;
+ }
+
+ entry_rundown(de);
if (S_ISDIR(de->mode))
parent->nlink--;
pde_put(de);
}
EXPORT_SYMBOL(remove_proc_entry);
+
+int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
+{
+ struct proc_dir_entry **p;
+ struct proc_dir_entry *root = NULL, *de, *next;
+ const char *fn = name;
+ unsigned int len;
+
+ spin_lock(&proc_subdir_lock);
+ if (__xlate_proc_name(name, &parent, &fn) != 0) {
+ spin_unlock(&proc_subdir_lock);
+ return -ENOENT;
+ }
+ len = strlen(fn);
+
+ for (p = &parent->subdir; *p; p=&(*p)->next ) {
+ if (proc_match(len, fn, *p)) {
+ root = *p;
+ *p = root->next;
+ root->next = NULL;
+ break;
+ }
+ }
+ if (!root) {
+ spin_unlock(&proc_subdir_lock);
+ return -ENOENT;
+ }
+ de = root;
+ while (1) {
+ next = de->subdir;
+ if (next) {
+ de->subdir = next->next;
+ next->next = NULL;
+ de = next;
+ continue;
+ }
+ spin_unlock(&proc_subdir_lock);
+
+ entry_rundown(de);
+ next = de->parent;
+ if (S_ISDIR(de->mode))
+ next->nlink--;
+ de->nlink = 0;
+ if (de == root)
+ break;
+ pde_put(de);
+
+ spin_lock(&proc_subdir_lock);
+ de = next;
+ }
+ pde_put(root);
+ return 0;
+}
+EXPORT_SYMBOL(remove_proc_subtree);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff