parent = debugfs_mount->mnt_root;
inode_lock(d_inode(parent));
- dentry = lookup_one_len(name, parent, strlen(name));
+ if (unlikely(IS_DEADDIR(d_inode(parent))))
+ dentry = ERR_PTR(-ENOENT);
+ else
+ dentry = lookup_one_len(name, parent, strlen(name));
if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {
if (d_is_dir(dentry))
pr_err("Directory '%s' with parent '%s' already present!\n",
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the file is
* to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.) If an error occurs, %ERR_PTR(-ERROR) will be
+ * you are responsible here.) If an error occurs, ERR_PTR(-ERROR) will be
* returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
* This function will return a pointer to a dentry if it succeeds. This
* pointer must be passed to the debugfs_remove() function when the symbolic
* link is to be removed (no automatic cleanup happens if your module is
- * unloaded, you are responsible here.) If an error occurs, %ERR_PTR(-ERROR)
+ * unloaded, you are responsible here.) If an error occurs, ERR_PTR(-ERROR)
* will be returned.
*
* If debugfs is not enabled in the kernel, the value -%ENODEV will be
wait_for_completion(&fsd->active_users_drained);
}
- static int __debugfs_remove(struct dentry *dentry, struct dentry *parent)
+ static void remove_one(struct dentry *victim)
{
- int ret = 0;
-
- if (simple_positive(dentry)) {
- dget(dentry);
- if (d_is_dir(dentry)) {
- ret = simple_rmdir(d_inode(parent), dentry);
- if (!ret)
- fsnotify_rmdir(d_inode(parent), dentry);
- } else {
- simple_unlink(d_inode(parent), dentry);
- fsnotify_unlink(d_inode(parent), dentry);
- }
- if (!ret)
- d_delete(dentry);
- if (d_is_reg(dentry))
- __debugfs_file_removed(dentry);
- dput(dentry);
- }
- return ret;
- }
-
- /**
- * debugfs_remove - removes a file or directory from the debugfs filesystem
- * @dentry: a pointer to a the dentry of the file or directory to be
- * removed. If this parameter is NULL or an error value, nothing
- * will be done.
- *
- * This function removes a file or directory in debugfs that was previously
- * created with a call to another debugfs function (like
- * debugfs_create_file() or variants thereof.)
- *
- * This function is required to be called in order for the file to be
- * removed, no automatic cleanup of files will happen when a module is
- * removed, you are responsible here.
- */
- void debugfs_remove(struct dentry *dentry)
- {
- struct dentry *parent;
- int ret;
-
- if (IS_ERR_OR_NULL(dentry))
- return;
-
- parent = dentry->d_parent;
- inode_lock(d_inode(parent));
- ret = __debugfs_remove(dentry, parent);
- inode_unlock(d_inode(parent));
- if (!ret)
- simple_release_fs(&debugfs_mount, &debugfs_mount_count);
+ if (d_is_reg(victim))
+ __debugfs_file_removed(victim);
+ simple_release_fs(&debugfs_mount, &debugfs_mount_count);
}
- EXPORT_SYMBOL_GPL(debugfs_remove);
/**
- * debugfs_remove_recursive - recursively removes a directory
+ * debugfs_remove - recursively removes a directory
* @dentry: a pointer to a the dentry of the directory to be removed. If this
* parameter is NULL or an error value, nothing will be done.
*
* removed, no automatic cleanup of files will happen when a module is
* removed, you are responsible here.
*/
- void debugfs_remove_recursive(struct dentry *dentry)
+ void debugfs_remove(struct dentry *dentry)
{
- struct dentry *child, *parent;
-
if (IS_ERR_OR_NULL(dentry))
return;
- parent = dentry;
- down:
- inode_lock(d_inode(parent));
- loop:
- /*
- * The parent->d_subdirs is protected by the d_lock. Outside that
- * lock, the child can be unlinked and set to be freed which can
- * use the d_u.d_child as the rcu head and corrupt this list.
- */
- spin_lock(&parent->d_lock);
- list_for_each_entry(child, &parent->d_subdirs, d_child) {
- if (!simple_positive(child))
- continue;
-
- /* perhaps simple_empty(child) makes more sense */
- if (!list_empty(&child->d_subdirs)) {
- spin_unlock(&parent->d_lock);
- inode_unlock(d_inode(parent));
- parent = child;
- goto down;
- }
-
- spin_unlock(&parent->d_lock);
-
- if (!__debugfs_remove(child, parent))
- simple_release_fs(&debugfs_mount, &debugfs_mount_count);
-
- /*
- * The parent->d_lock protects agaist child from unlinking
- * from d_subdirs. When releasing the parent->d_lock we can
- * no longer trust that the next pointer is valid.
- * Restart the loop. We'll skip this one with the
- * simple_positive() check.
- */
- goto loop;
- }
- spin_unlock(&parent->d_lock);
-
- inode_unlock(d_inode(parent));
- child = parent;
- parent = parent->d_parent;
- inode_lock(d_inode(parent));
-
- if (child != dentry)
- /* go up */
- goto loop;
-
- if (!__debugfs_remove(child, parent))
- simple_release_fs(&debugfs_mount, &debugfs_mount_count);
- inode_unlock(d_inode(parent));
+ simple_pin_fs(&debug_fs_type, &debugfs_mount, &debugfs_mount_count);
+ simple_recursive_removal(dentry, remove_one);
+ simple_release_fs(&debugfs_mount, &debugfs_mount_count);
}
- EXPORT_SYMBOL_GPL(debugfs_remove_recursive);
+ EXPORT_SYMBOL_GPL(debugfs_remove);
/**
* debugfs_rename - rename a file/directory in the debugfs filesystem
return retval;
}
core_initcall(debugfs_init);
-
i_size = inode->i_size;
} while (read_seqcount_retry(&inode->i_size_seqcount, seq));
return i_size;
-#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
+#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
loff_t i_size;
preempt_disable();
inode->i_size = i_size;
write_seqcount_end(&inode->i_size_seqcount);
preempt_enable();
-#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
+#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
preempt_disable();
inode->i_size = i_size;
preempt_enable();
inode->i_gid = make_kgid(inode->i_sb->s_user_ns, gid);
}
-extern struct timespec64 timespec64_trunc(struct timespec64 t, unsigned gran);
extern struct timespec64 current_time(struct inode *inode);
/*
};
}
+static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
+ struct file *filp)
+{
+ *kiocb = (struct kiocb) {
+ .ki_filp = filp,
+ .ki_flags = kiocb_src->ki_flags,
+ .ki_hint = kiocb_src->ki_hint,
+ .ki_ioprio = kiocb_src->ki_ioprio,
+ .ki_pos = kiocb_src->ki_pos,
+ };
+}
+
/*
* Inode state bits. Protected by inode->i_lock
*
int (*open)(struct inode *, struct file *));
extern int finish_no_open(struct file *file, struct dentry *dentry);
-/* fs/ioctl.c */
-
-extern int ioctl_preallocate(struct file *filp, int mode, void __user *argp);
-
/* fs/dcache.c */
extern void __init vfs_caches_init_early(void);
extern void __init vfs_caches_init(void);
extern bool filemap_range_has_page(struct address_space *, loff_t lstart,
loff_t lend);
-extern int filemap_write_and_wait(struct address_space *mapping);
extern int filemap_write_and_wait_range(struct address_space *mapping,
loff_t lstart, loff_t lend);
extern int __filemap_fdatawrite_range(struct address_space *mapping,
extern int filemap_check_errors(struct address_space *mapping);
extern void __filemap_set_wb_err(struct address_space *mapping, int err);
+static inline int filemap_write_and_wait(struct address_space *mapping)
+{
+ return filemap_write_and_wait_range(mapping, 0, LLONG_MAX);
+}
+
extern int __must_check file_fdatawait_range(struct file *file, loff_t lstart,
loff_t lend);
extern int __must_check file_check_and_advance_wb_err(struct file *file);
rwf_t flags);
ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos,
rwf_t flags);
+ssize_t vfs_iocb_iter_read(struct file *file, struct kiocb *iocb,
+ struct iov_iter *iter);
+ssize_t vfs_iocb_iter_write(struct file *file, struct kiocb *iocb,
+ struct iov_iter *iter);
/* fs/block_dev.c */
extern ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to);
extern int simple_rmdir(struct inode *, struct dentry *);
extern int simple_rename(struct inode *, struct dentry *,
struct inode *, struct dentry *, unsigned int);
+ extern void simple_recursive_removal(struct dentry *,
+ void (*callback)(struct dentry *));
extern int noop_fsync(struct file *, loff_t, loff_t, int);
extern int noop_set_page_dirty(struct page *page);
extern void noop_invalidatepage(struct page *page, unsigned int offset,
}
if (security_locked_down(LOCKDOWN_TRACEFS)) {
- pr_warning("Can not register tracer %s due to lockdown\n",
+ pr_warn("Can not register tracer %s due to lockdown\n",
type->name);
return -EPERM;
}
int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled)
{
+ if ((mask == TRACE_ITER_RECORD_TGID) ||
+ (mask == TRACE_ITER_RECORD_CMD))
+ lockdep_assert_held(&event_mutex);
+
/* do nothing if flag is already set */
if (!!(tr->trace_flags & mask) == !!enabled)
return 0;
cmp += len;
+ mutex_lock(&event_mutex);
mutex_lock(&trace_types_lock);
ret = match_string(trace_options, -1, cmp);
ret = set_tracer_flag(tr, 1 << ret, !neg);
mutex_unlock(&trace_types_lock);
+ mutex_unlock(&event_mutex);
/*
* If the first trailing whitespace is replaced with '\0' by strstrip,
if (val != 0 && val != 1)
return -EINVAL;
+ mutex_lock(&event_mutex);
mutex_lock(&trace_types_lock);
ret = set_tracer_flag(tr, 1 << index, val);
mutex_unlock(&trace_types_lock);
+ mutex_unlock(&event_mutex);
if (ret < 0)
return ret;
ret = event_trace_add_tracer(tr->dir, tr);
if (ret) {
- tracefs_remove_recursive(tr->dir);
+ tracefs_remove(tr->dir);
goto out_free_tr;
}
event_trace_del_tracer(tr);
ftrace_clear_pids(tr);
ftrace_destroy_function_files(tr);
- tracefs_remove_recursive(tr->dir);
+ tracefs_remove(tr->dir);
free_trace_buffers(tr);
for (i = 0; i < tr->nr_topts; i++) {
struct trace_array *tr = &global_trace;
if (security_locked_down(LOCKDOWN_TRACEFS)) {
- pr_warning("Tracing disabled due to lockdown\n");
+ pr_warn("Tracing disabled due to lockdown\n");
return ERR_PTR(-EPERM);
}
if (security_locked_down(LOCKDOWN_TRACEFS)) {
- pr_warning("Tracing disabled due to lockdown\n");
+ pr_warn("Tracing disabled due to lockdown\n");
return -EPERM;
}
{
/* sched_clock_stable() is determined in late_initcall */
if (!trace_boot_clock && !sched_clock_stable()) {
+ if (security_locked_down(LOCKDOWN_TRACEFS)) {
+ pr_warn("Can not set tracing clock due to lockdown\n");
+ return -EPERM;
+ }
+
printk(KERN_WARNING
"Unstable clock detected, switching default tracing clock to \"global\"\n"
"If you want to keep using the local clock, then add:\n"
#include <linux/delay.h>
#include <trace/events/sched.h>
+#include <trace/syscall.h>
#include <asm/setup.h>
struct trace_event_file *file;
struct trace_array *tr;
- mutex_lock(&event_mutex);
+ lockdep_assert_held(&event_mutex);
+
do_for_each_event_file(tr, file) {
if (!(file->flags & EVENT_FILE_FL_ENABLED))
clear_bit(EVENT_FILE_FL_RECORDED_CMD_BIT, &file->flags);
}
} while_for_each_event_file();
- mutex_unlock(&event_mutex);
}
void trace_event_enable_tgid_record(bool enable)
struct trace_event_file *file;
struct trace_array *tr;
- mutex_lock(&event_mutex);
+ lockdep_assert_held(&event_mutex);
+
do_for_each_event_file(tr, file) {
if (!(file->flags & EVENT_FILE_FL_ENABLED))
continue;
&file->flags);
}
} while_for_each_event_file();
- mutex_unlock(&event_mutex);
}
static int __ftrace_event_enable_disable(struct trace_event_file *file,
return;
if (!--dir->nr_events) {
- tracefs_remove_recursive(dir->entry);
+ tracefs_remove(dir->entry);
list_del(&dir->list);
__put_system_dir(dir);
}
}
spin_unlock(&dir->d_lock);
- tracefs_remove_recursive(dir);
+ tracefs_remove(dir);
}
list_del(&file->list);
*/
head = trace_get_fields(call);
if (list_empty(head)) {
- ret = call->class->define_fields(call);
+ struct trace_event_fields *field = call->class->fields_array;
+ unsigned int offset = sizeof(struct trace_entry);
+
+ for (; field->type; field++) {
+ if (field->type == TRACE_FUNCTION_TYPE) {
+ ret = field->define_fields(call);
+ break;
+ }
+
+ offset = ALIGN(offset, field->align);
+ ret = trace_define_field(call, field->type, field->name,
+ offset, field->size,
+ field->is_signed, field->filter_type);
+ if (ret)
+ break;
+
+ offset += field->size;
+ }
if (ret < 0) {
pr_warn("Could not initialize trace point events/%s\n",
name);
down_write(&trace_event_sem);
__trace_remove_event_dirs(tr);
- tracefs_remove_recursive(tr->event_dir);
+ tracefs_remove(tr->event_dir);
up_write(&trace_event_sem);
tr->event_dir = NULL;
projects / linux-2.6-microblaze.git / commitdiff