Commit ab70a1d7 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  [net/9p]: Introduce basic flow-control for VirtIO transport.
  9p: use the updated offset given by generic_write_checks
  [net/9p] Don't re-pin pages on retrying virtqueue_add_buf().
  [net/9p] Set the condition just before waking up.
  [net/9p] unconditional wake_up to proc waiting for space on VirtIO ring
  fs/9p: Add v9fs_dentry2v9ses
  fs/9p: Attach writeback_fid on first open with WR flag
  fs/9p: Open writeback fid in O_SYNC mode
  fs/9p: Use truncate_setsize instead of vmtruncate
  net/9p: Fix compile warning
  net/9p: Convert the in the 9p rpc call path to GFP_NOFS
  fs/9p: Fix race in initializing writeback fid
parents 0adfc56c 68da9ba4

fs/9p/acl.c

+2 −2
Original line number Diff line number Diff line
@@ -262,7 +262,7 @@ static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name, 
	if (strcmp(name, "") != 0)

		return -EINVAL;



	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	/*

	 * We allow set/get/list of acl when access=client is not specified

	 */
@@ -312,7 +312,7 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name, 
	if (strcmp(name, "") != 0)

		return -EINVAL;



	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	/*

	 * set the attribute on the remote. Without even looking at the

	 * xattr value. We leave it to the server to validate

fs/9p/fid.c

+15 −4
Original line number Diff line number Diff line
@@ -134,7 +134,7 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, 
	struct v9fs_session_info *v9ses;

	struct p9_fid *fid, *old_fid = NULL;



	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	access = v9ses->flags & V9FS_ACCESS_MASK;

	fid = v9fs_fid_find(dentry, uid, any);

	if (fid)
@@ -237,7 +237,7 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry) 
	int  any, access;

	struct v9fs_session_info *v9ses;



	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	access = v9ses->flags & V9FS_ACCESS_MASK;

	switch (access) {

	case V9FS_ACCESS_SINGLE:
@@ -286,9 +286,11 @@ static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, uid_t uid) 


struct p9_fid *v9fs_writeback_fid(struct dentry *dentry)

{

	int err;

	int err, flags;

	struct p9_fid *fid;

	struct v9fs_session_info *v9ses;



	v9ses = v9fs_dentry2v9ses(dentry);

	fid = v9fs_fid_clone_with_uid(dentry, 0);

	if (IS_ERR(fid))

		goto error_out;
@@ -297,8 +299,17 @@ struct p9_fid *v9fs_writeback_fid(struct dentry *dentry) 
	 * dirty pages. We always request for the open fid in read-write

	 * mode so that a partial page write which result in page

	 * read can work.

	 *

	 * we don't have a tsyncfs operation for older version

	 * of protocol. So make sure the write back fid is

	 * opened in O_SYNC mode.

	 */

	err = p9_client_open(fid, O_RDWR);

	if (!v9fs_proto_dotl(v9ses))

		flags = O_RDWR | O_SYNC;

	else

		flags = O_RDWR;



	err = p9_client_open(fid, flags);

	if (err < 0) {

		p9_client_clunk(fid);

		fid = ERR_PTR(err);

fs/9p/v9fs.h

+6 −0
Original line number Diff line number Diff line
@@ -130,6 +130,7 @@ struct v9fs_inode { 
#endif

	unsigned int cache_validity;

	struct p9_fid *writeback_fid;

	struct mutex v_mutex;

	struct inode vfs_inode;

};
@@ -173,6 +174,11 @@ static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode) 
	return (inode->i_sb->s_fs_info);

}



static inline struct v9fs_session_info *v9fs_dentry2v9ses(struct dentry *dentry)

{

	return dentry->d_sb->s_fs_info;

}



static inline int v9fs_proto_dotu(struct v9fs_session_info *v9ses)

{

	return v9ses->flags & V9FS_PROTO_2000U;

fs/9p/vfs_file.c

+10 −3
Original line number Diff line number Diff line
@@ -90,7 +90,9 @@ int v9fs_file_open(struct inode *inode, struct file *file) 
	}



	file->private_data = fid;

	if (v9ses->cache && !v9inode->writeback_fid) {

	mutex_lock(&v9inode->v_mutex);

	if (v9ses->cache && !v9inode->writeback_fid &&

	    ((file->f_flags & O_ACCMODE) != O_RDONLY)) {

		/*

		 * clone a fid and add it to writeback_fid

		 * we do it during open time instead of
@@ -101,10 +103,12 @@ int v9fs_file_open(struct inode *inode, struct file *file) 
		fid = v9fs_writeback_fid(file->f_path.dentry);

		if (IS_ERR(fid)) {

			err = PTR_ERR(fid);

			mutex_unlock(&v9inode->v_mutex);

			goto out_error;

		}

		v9inode->writeback_fid = (void *) fid;

	}

	mutex_unlock(&v9inode->v_mutex);

#ifdef CONFIG_9P_FSCACHE

	if (v9ses->cache)

		v9fs_cache_inode_set_cookie(inode, file);
@@ -504,9 +508,12 @@ v9fs_file_write(struct file *filp, const char __user * data, 
	if (!count)

		goto out;



	return v9fs_file_write_internal(filp->f_path.dentry->d_inode,

	retval = v9fs_file_write_internal(filp->f_path.dentry->d_inode,

					filp->private_data,

					data, count, offset, 1);

					data, count, &origin, 1);

	/* update offset on successful write */

	if (retval > 0)

		*offset = origin;

out:

	return retval;

}

fs/9p/vfs_inode.c

+19 −10
Original line number Diff line number Diff line
@@ -221,6 +221,7 @@ struct inode *v9fs_alloc_inode(struct super_block *sb) 
#endif

	v9inode->writeback_fid = NULL;

	v9inode->cache_validity = 0;

	mutex_init(&v9inode->v_mutex);

	return &v9inode->vfs_inode;

}
@@ -650,7 +651,9 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 
	/* if we are opening a file, assign the open fid to the file */

	if (nd && nd->flags & LOOKUP_OPEN) {

		v9inode = V9FS_I(dentry->d_inode);

		if (v9ses->cache && !v9inode->writeback_fid) {

		mutex_lock(&v9inode->v_mutex);

		if (v9ses->cache && !v9inode->writeback_fid &&

		    ((flags & O_ACCMODE) != O_RDONLY)) {

			/*

			 * clone a fid and add it to writeback_fid

			 * we do it during open time instead of
@@ -661,10 +664,12 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, 
			inode_fid = v9fs_writeback_fid(dentry);

			if (IS_ERR(inode_fid)) {

				err = PTR_ERR(inode_fid);

				mutex_unlock(&v9inode->v_mutex);

				goto error;

			}

			v9inode->writeback_fid = (void *) inode_fid;

		}

		mutex_unlock(&v9inode->v_mutex);

		filp = lookup_instantiate_filp(nd, dentry, generic_file_open);

		if (IS_ERR(filp)) {

			err = PTR_ERR(filp);
@@ -931,7 +936,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, 


	P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);

	err = -EPERM;

	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {

		generic_fillattr(dentry->d_inode, stat);

		return 0;
@@ -967,8 +972,12 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 
	struct p9_wstat wstat;



	P9_DPRINTK(P9_DEBUG_VFS, "\n");

	retval = inode_change_ok(dentry->d_inode, iattr);

	if (retval)

		return retval;



	retval = -EPERM;

	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	fid = v9fs_fid_lookup(dentry);

	if(IS_ERR(fid))

		return PTR_ERR(fid);
@@ -993,12 +1002,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 
		if (iattr->ia_valid & ATTR_GID)

			wstat.n_gid = iattr->ia_gid;

	}

	if ((iattr->ia_valid & ATTR_SIZE) &&

	    iattr->ia_size != i_size_read(dentry->d_inode)) {

		retval = vmtruncate(dentry->d_inode, iattr->ia_size);

		if (retval)

			return retval;

	}



	/* Write all dirty data */

	if (S_ISREG(dentry->d_inode->i_mode))

		filemap_write_and_wait(dentry->d_inode->i_mapping);
@@ -1006,6 +1010,11 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) 
	retval = p9_client_wstat(fid, &wstat);

	if (retval < 0)

		return retval;



	if ((iattr->ia_valid & ATTR_SIZE) &&

	    iattr->ia_size != i_size_read(dentry->d_inode))

		truncate_setsize(dentry->d_inode, iattr->ia_size);



	v9fs_invalidate_inode_attr(dentry->d_inode);



	setattr_copy(dentry->d_inode, iattr);
@@ -1130,7 +1139,7 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) 


	P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);

	retval = -EPERM;

	v9ses = v9fs_inode2v9ses(dentry->d_inode);

	v9ses = v9fs_dentry2v9ses(dentry);

	fid = v9fs_fid_lookup(dentry);

	if (IS_ERR(fid))

		return PTR_ERR(fid);

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