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Commit 4591343e authored by Linus Torvalds's avatar Linus Torvalds
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Merge branches 'work.misc' and 'work.dcache' of... 

Merge branches 'work.misc' and 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull misc vfs updates from Al Viro:
 "Misc cleanups from various folks all over the place

  I expected more fs/dcache.c cleanups this cycle, so that went into a
  separate branch. Said cleanups have missed the window, so in the
  hindsight it could've gone into work.misc instead. Decided not to
  cherry-pick, thus the 'work.dcache' branch"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: dcache: Use true and false for boolean values
  fold generic_readlink() into its only caller
  fs: shave 8 bytes off of struct inode
  fs: Add more kernel-doc to the produced documentation
  fs: Fix attr.c kernel-doc
  removed extra extern file_fdatawait_range

* 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  kill dentry_update_name_case()
parents f2be2698 7964410f 63a67a92

Documentation/filesystems/index.rst

+33 −0
Original line number Original line Diff line number Diff line
@@ -71,6 +71,39 @@ Other Functions 
.. kernel-doc:: fs/block_dev.c

.. kernel-doc:: fs/block_dev.c

   :export:

   :export:





.. kernel-doc:: fs/anon_inodes.c

   :export:



.. kernel-doc:: fs/attr.c

   :export:



.. kernel-doc:: fs/d_path.c

   :export:



.. kernel-doc:: fs/dax.c

   :export:



.. kernel-doc:: fs/direct-io.c

   :export:



.. kernel-doc:: fs/file_table.c

   :export:



.. kernel-doc:: fs/libfs.c

   :export:



.. kernel-doc:: fs/posix_acl.c

   :export:



.. kernel-doc:: fs/stat.c

   :export:



.. kernel-doc:: fs/sync.c

   :export:



.. kernel-doc:: fs/xattr.c

   :export:



The proc filesystem

The proc filesystem

===================

===================

fs/attr.c

+3 −2
Original line number Original line Diff line number Diff line
@@ -120,7 +120,6 @@ EXPORT_SYMBOL(setattr_prepare); 
 * inode_newsize_ok - may this inode be truncated to a given size

 * inode_newsize_ok - may this inode be truncated to a given size

 * @inode:	the inode to be truncated

 * @inode:	the inode to be truncated

 * @offset:	the new size to assign to the inode

 * @offset:	the new size to assign to the inode

 * @Returns:	0 on success, -ve errno on failure

 *

 *

 * inode_newsize_ok must be called with i_mutex held.

 * inode_newsize_ok must be called with i_mutex held.

 *

 *
@@ -130,6 +129,8 @@ EXPORT_SYMBOL(setattr_prepare); 
 * returned. @inode must be a file (not directory), with appropriate

 * returned. @inode must be a file (not directory), with appropriate

 * permissions to allow truncate (inode_newsize_ok does NOT check these

 * permissions to allow truncate (inode_newsize_ok does NOT check these

 * conditions).

 * conditions).

 *

 * Return: 0 on success, -ve errno on failure

 */

 */

int inode_newsize_ok(const struct inode *inode, loff_t offset)

int inode_newsize_ok(const struct inode *inode, loff_t offset)

{

{
@@ -205,7 +206,7 @@ EXPORT_SYMBOL(setattr_copy); 
/**

/**

 * notify_change - modify attributes of a filesytem object

 * notify_change - modify attributes of a filesytem object

 * @dentry:	object affected

 * @dentry:	object affected

 * @iattr:	new attributes

 * @attr:	new attributes

 * @delegated_inode: returns inode, if the inode is delegated

 * @delegated_inode: returns inode, if the inode is delegated

 *

 *

 * The caller must hold the i_mutex on the affected object.

 * The caller must hold the i_mutex on the affected object.

fs/dcache.c

+6 −33
Original line number Original line Diff line number Diff line
@@ -729,16 +729,16 @@ static inline bool fast_dput(struct dentry *dentry) 
		if (dentry->d_lockref.count > 1) {

		if (dentry->d_lockref.count > 1) {

			dentry->d_lockref.count--;

			dentry->d_lockref.count--;

			spin_unlock(&dentry->d_lock);

			spin_unlock(&dentry->d_lock);

			return 1;

			return true;

		}

		}

		return 0;

		return false;

	}

	}





	/*

	/*

	 * If we weren't the last ref, we're done.

	 * If we weren't the last ref, we're done.

	 */

	 */

	if (ret)

	if (ret)

		return 1;

		return true;





	/*

	/*

	 * Careful, careful. The reference count went down

	 * Careful, careful. The reference count went down
@@ -767,7 +767,7 @@ static inline bool fast_dput(struct dentry *dentry) 




	/* Nothing to do? Dropping the reference was all we needed? */

	/* Nothing to do? Dropping the reference was all we needed? */

	if (d_flags == (DCACHE_REFERENCED | DCACHE_LRU_LIST) && !d_unhashed(dentry))

	if (d_flags == (DCACHE_REFERENCED | DCACHE_LRU_LIST) && !d_unhashed(dentry))

		return 1;

		return true;





	/*

	/*

	 * Not the fast normal case? Get the lock. We've already decremented

	 * Not the fast normal case? Get the lock. We've already decremented
@@ -784,7 +784,7 @@ static inline bool fast_dput(struct dentry *dentry) 
	 */

	 */

	if (dentry->d_lockref.count) {

	if (dentry->d_lockref.count) {

		spin_unlock(&dentry->d_lock);

		spin_unlock(&dentry->d_lock);

		return 1;

		return true;

	}

	}





	/*

	/*
@@ -793,7 +793,7 @@ static inline bool fast_dput(struct dentry *dentry) 
	 * set it to 1.

	 * set it to 1.

	 */

	 */

	dentry->d_lockref.count = 1;

	dentry->d_lockref.count = 1;

	return 0;

	return false;

}

}
@@ -2648,33 +2648,6 @@ struct dentry *d_exact_alias(struct dentry *entry, struct inode *inode) 
}

}

EXPORT_SYMBOL(d_exact_alias);

EXPORT_SYMBOL(d_exact_alias);





/**

 * dentry_update_name_case - update case insensitive dentry with a new name

 * @dentry: dentry to be updated

 * @name: new name

 *

 * Update a case insensitive dentry with new case of name.

 *

 * dentry must have been returned by d_lookup with name @name. Old and new

 * name lengths must match (ie. no d_compare which allows mismatched name

 * lengths).

 *

 * Parent inode i_mutex must be held over d_lookup and into this call (to

 * keep renames and concurrent inserts, and readdir(2) away).

 */

void dentry_update_name_case(struct dentry *dentry, const struct qstr *name)

{

	BUG_ON(!inode_is_locked(dentry->d_parent->d_inode));

	BUG_ON(dentry->d_name.len != name->len); /* d_lookup gives this */



	spin_lock(&dentry->d_lock);

	write_seqcount_begin(&dentry->d_seq);

	memcpy((unsigned char *)dentry->d_name.name, name->name, name->len);

	write_seqcount_end(&dentry->d_seq);

	spin_unlock(&dentry->d_lock);

}

EXPORT_SYMBOL(dentry_update_name_case);



static void swap_names(struct dentry *dentry, struct dentry *target)

static void swap_names(struct dentry *dentry, struct dentry *target)

{

{

	if (unlikely(dname_external(target))) {

	if (unlikely(dname_external(target))) {

fs/namei.c

+12 −24
Original line number Original line Diff line number Diff line
@@ -4655,29 +4655,6 @@ int readlink_copy(char __user *buffer, int buflen, const char *link) 
	return len;

	return len;

}

}





/*

 * A helper for ->readlink().  This should be used *ONLY* for symlinks that

 * have ->get_link() not calling nd_jump_link().  Using (or not using) it

 * for any given inode is up to filesystem.

 */

static int generic_readlink(struct dentry *dentry, char __user *buffer,

			    int buflen)

{

	DEFINE_DELAYED_CALL(done);

	struct inode *inode = d_inode(dentry);

	const char *link = inode->i_link;

	int res;



	if (!link) {

		link = inode->i_op->get_link(dentry, inode, &done);

		if (IS_ERR(link))

			return PTR_ERR(link);

	}

	res = readlink_copy(buffer, buflen, link);

	do_delayed_call(&done);

	return res;

}



/**

/**

 * vfs_readlink - copy symlink body into userspace buffer

 * vfs_readlink - copy symlink body into userspace buffer

 * @dentry: dentry on which to get symbolic link

 * @dentry: dentry on which to get symbolic link
@@ -4691,6 +4668,9 @@ static int generic_readlink(struct dentry *dentry, char __user *buffer, 
int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)

int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)

{

{

	struct inode *inode = d_inode(dentry);

	struct inode *inode = d_inode(dentry);

	DEFINE_DELAYED_CALL(done);

	const char *link;

	int res;





	if (unlikely(!(inode->i_opflags & IOP_DEFAULT_READLINK))) {

	if (unlikely(!(inode->i_opflags & IOP_DEFAULT_READLINK))) {

		if (unlikely(inode->i_op->readlink))

		if (unlikely(inode->i_op->readlink))
@@ -4704,7 +4684,15 @@ int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen) 
		spin_unlock(&inode->i_lock);

		spin_unlock(&inode->i_lock);

	}

	}





	return generic_readlink(dentry, buffer, buflen);

	link = inode->i_link;

	if (!link) {

		link = inode->i_op->get_link(dentry, inode, &done);

		if (IS_ERR(link))

			return PTR_ERR(link);

	}

	res = readlink_copy(buffer, buflen, link);

	do_delayed_call(&done);

	return res;

}

}

EXPORT_SYMBOL(vfs_readlink);

EXPORT_SYMBOL(vfs_readlink);

include/linux/dcache.h

+0 −2
Original line number Original line Diff line number Diff line
@@ -270,8 +270,6 @@ extern void d_rehash(struct dentry *); 
 

 

extern void d_add(struct dentry *, struct inode *);

extern void d_add(struct dentry *, struct inode *);





extern void dentry_update_name_case(struct dentry *, const struct qstr *);



/* used for rename() and baskets */

/* used for rename() and baskets */

extern void d_move(struct dentry *, struct dentry *);

extern void d_move(struct dentry *, struct dentry *);

extern void d_exchange(struct dentry *, struct dentry *);

extern void d_exchange(struct dentry *, struct dentry *);