fs-verity: fix all kerneldoc warnings

Fix all kerneldoc warnings in fs/verity/ and include/linux/fsverity.h.
Most of these were due to missing documentation for function parameters.

Detected with:

    scripts/kernel-doc -v -none fs/verity/*.{c,h} include/linux/fsverity.h

This cleanup makes it possible to check new patches for kerneldoc
warnings without having to filter out all the existing ones.

Link: https://lore.kernel.org/r/20200511192118.71427-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>

fs/verity/enable.c

@@ -329,6 +329,8 @@ static int enable_verity(struct file *filp,
 
 /**
  * fsverity_ioctl_enable() - enable verity on a file
+ * @filp: file to enable verity on
+ * @uarg: user pointer to fsverity_enable_arg
  *
  * Enable fs-verity on a file.  See the "FS_IOC_ENABLE_VERITY" section of
  * Documentation/filesystems/fsverity.rst for the documentation.

fs/verity/fsverity_private.h

@@ -61,7 +61,7 @@ struct merkle_tree_params {
 	u64 level_start[FS_VERITY_MAX_LEVELS];
 };
 
-/**
+/*
  * fsverity_info - cached verity metadata for an inode
  *
  * When a verity file is first opened, an instance of this struct is allocated

fs/verity/measure.c

@@ -11,6 +11,8 @@
 
 /**
  * fsverity_ioctl_measure() - get a verity file's measurement
+ * @filp: file to get measurement of
+ * @_uarg: user pointer to fsverity_digest
  *
  * Retrieve the file measurement that the kernel is enforcing for reads from a
  * verity file.  See the "FS_IOC_MEASURE_VERITY" section of

fs/verity/open.c

@@ -330,6 +330,7 @@ EXPORT_SYMBOL_GPL(fsverity_prepare_setattr);
 
 /**
  * fsverity_cleanup_inode() - free the inode's verity info, if present
+ * @inode: an inode being evicted
  *
  * Filesystems must call this on inode eviction to free ->i_verity_info.
  */

fs/verity/signature.c

@@ -28,6 +28,9 @@ static struct key *fsverity_keyring;
 
 /**
  * fsverity_verify_signature() - check a verity file's signature
+ * @vi: the file's fsverity_info
+ * @desc: the file's fsverity_descriptor
+ * @desc_size: size of @desc
  *
  * If the file's fs-verity descriptor includes a signature of the file
  * measurement, verify it against the certificates in the fs-verity keyring.

fs/verity/verify.c

@@ -179,6 +179,7 @@ static bool verify_page(struct inode *inode, const struct fsverity_info *vi,
 
 /**
  * fsverity_verify_page() - verify a data page
+ * @page: the page to verity
  *
  * Verify a page that has just been read from a verity file.  The page must be a
  * pagecache page that is still locked and not yet uptodate.
@@ -206,6 +207,7 @@ EXPORT_SYMBOL_GPL(fsverity_verify_page);
 #ifdef CONFIG_BLOCK
 /**
  * fsverity_verify_bio() - verify a 'read' bio that has just completed
+ * @bio: the bio to verify
  *
  * Verify a set of pages that have just been read from a verity file.  The pages
  * must be pagecache pages that are still locked and not yet uptodate.  Pages
@@ -264,6 +266,7 @@ EXPORT_SYMBOL_GPL(fsverity_verify_bio);
 
 /**
  * fsverity_enqueue_verify_work() - enqueue work on the fs-verity workqueue
+ * @work: the work to enqueue
  *
  * Enqueue verification work for asynchronous processing.
  */

include/linux/fsverity.h

@@ -200,13 +200,16 @@ static inline void fsverity_enqueue_verify_work(struct work_struct *work)
 
 /**
  * fsverity_active() - do reads from the inode need to go through fs-verity?
+ * @inode: inode to check
  *
  * This checks whether ->i_verity_info has been set.
  *
  * Filesystems call this from ->readpages() to check whether the pages need to
  * be verified or not.  Don't use IS_VERITY() for this purpose; it's subject to
  * a race condition where the file is being read concurrently with
  * FS_IOC_ENABLE_VERITY completing.  (S_VERITY is set before ->i_verity_info.)
+ *
+ * Return: true if reads need to go through fs-verity, otherwise false
  */
 static inline bool fsverity_active(const struct inode *inode)
 {