diff options
Diffstat (limited to 'fs/debugfs')
| -rw-r--r-- | fs/debugfs/file.c | 14 | ||||
| -rw-r--r-- | fs/debugfs/inode.c | 34 |
2 files changed, 32 insertions, 16 deletions
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index ddd708b09fa1..93e4ca6b2ad7 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -997,25 +997,19 @@ static const struct file_operations u32_array_fops = { * @array as data. If the @mode variable is so set it can be read from. * Writing is not supported. Seek within the file is also not supported. * Once array is created its size can not be changed. - * - * The function returns a pointer to dentry on success. If an error occurs, - * %ERR_PTR(-ERROR) or NULL will be returned. If debugfs is not enabled in - * the kernel, the value %ERR_PTR(-ENODEV) will be returned. */ -struct dentry *debugfs_create_u32_array(const char *name, umode_t mode, - struct dentry *parent, - u32 *array, u32 elements) +void debugfs_create_u32_array(const char *name, umode_t mode, + struct dentry *parent, u32 *array, u32 elements) { struct array_data *data = kmalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) - return NULL; + return; data->array = array; data->elements = elements; - return debugfs_create_file_unsafe(name, mode, parent, data, - &u32_array_fops); + debugfs_create_file_unsafe(name, mode, parent, data, &u32_array_fops); } EXPORT_SYMBOL_GPL(debugfs_create_u32_array); diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index 1e444fe1f778..042b688ed124 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -2,13 +2,16 @@ /* * inode.c - part of debugfs, a tiny little debug file system * - * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com> + * Copyright (C) 2004,2019 Greg Kroah-Hartman <greg@kroah.com> * Copyright (C) 2004 IBM Inc. + * Copyright (C) 2019 Linux Foundation <gregkh@linuxfoundation.org> * * debugfs is for people to use instead of /proc or /sys. * See ./Documentation/core-api/kernel-api.rst for more details. */ +#define pr_fmt(fmt) "debugfs: " fmt + #include <linux/module.h> #include <linux/fs.h> #include <linux/mount.h> @@ -285,15 +288,17 @@ static struct dentry *start_creating(const char *name, struct dentry *parent) struct dentry *dentry; int error; - pr_debug("debugfs: creating file '%s'\n",name); + pr_debug("creating file '%s'\n", name); if (IS_ERR(parent)) return parent; error = simple_pin_fs(&debug_fs_type, &debugfs_mount, &debugfs_mount_count); - if (error) + if (error) { + pr_err("Unable to pin filesystem for file '%s'\n", name); return ERR_PTR(error); + } /* If the parent is not specified, we create it in the root. * We need the root dentry to do this, which is in the super @@ -306,6 +311,12 @@ static struct dentry *start_creating(const char *name, struct dentry *parent) inode_lock(d_inode(parent)); 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", + name, parent->d_name.name); + else + pr_err("File '%s' in directory '%s' already present!\n", + name, parent->d_name.name); dput(dentry); dentry = ERR_PTR(-EEXIST); } @@ -349,8 +360,11 @@ static struct dentry *__debugfs_create_file(const char *name, umode_t mode, return dentry; inode = debugfs_get_inode(dentry->d_sb); - if (unlikely(!inode)) + if (unlikely(!inode)) { + pr_err("out of free dentries, can not create file '%s'\n", + name); return failed_creating(dentry); + } inode->i_mode = mode; inode->i_private = data; @@ -511,8 +525,11 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent) return dentry; inode = debugfs_get_inode(dentry->d_sb); - if (unlikely(!inode)) + if (unlikely(!inode)) { + pr_err("out of free dentries, can not create directory '%s'\n", + name); return failed_creating(dentry); + } inode->i_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO; inode->i_op = &simple_dir_inode_operations; @@ -550,8 +567,11 @@ struct dentry *debugfs_create_automount(const char *name, return dentry; inode = debugfs_get_inode(dentry->d_sb); - if (unlikely(!inode)) + if (unlikely(!inode)) { + pr_err("out of free dentries, can not create automount '%s'\n", + name); return failed_creating(dentry); + } make_empty_dir_inode(inode); inode->i_flags |= S_AUTOMOUNT; @@ -606,6 +626,8 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent, inode = debugfs_get_inode(dentry->d_sb); if (unlikely(!inode)) { + pr_err("out of free dentries, can not create symlink '%s'\n", + name); kfree(link); return failed_creating(dentry); } |