Merge tag 'afs-next-20171113' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull AFS updates from David Howells:
 "kAFS filesystem driver overhaul.

  The major points of the overhaul are:

   (1) Preliminary groundwork is laid for supporting network-namespacing
       of kAFS. The remainder of the namespacing work requires some way
       to pass namespace information to submounts triggered by an
       automount. This requires something like the mount overhaul that's
       in progress.

   (2) sockaddr_rxrpc is used in preference to in_addr for holding
       addresses internally and add support for talking to the YFS VL
       server. With this, kAFS can do everything over IPv6 as well as
       IPv4 if it's talking to servers that support it.

   (3) Callback handling is overhauled to be generally passive rather
       than active. 'Callbacks' are promises by the server to tell us
       about data and metadata changes. Callbacks are now checked when
       we next touch an inode rather than actively going and looking for
       it where possible.

   (4) File access permit caching is overhauled to store the caching
       information per-inode rather than per-directory, shared over
       subordinate files. Whilst older AFS servers only allow ACLs on
       directories (shared to the files in that directory), newer AFS
       servers break that restriction.

       To improve memory usage and to make it easier to do mass-key
       removal, permit combinations are cached and shared.

   (5) Cell database management is overhauled to allow lighter locks to
       be used and to make cell records autonomous state machines that
       look after getting their own DNS records and cleaning themselves
       up, in particular preventing races in acquiring and relinquishing
       the fscache token for the cell.

   (6) Volume caching is overhauled. The afs_vlocation record is got rid
       of to simplify things and the superblock is now keyed on the cell
       and the numeric volume ID only. The volume record is tied to a
       superblock and normal superblock management is used to mediate
       the lifetime of the volume fscache token.

   (7) File server record caching is overhauled to make server records
       independent of cells and volumes. A server can be in multiple
       cells (in such a case, the administrator must make sure that the
       VL services for all cells correctly reflect the volumes shared
       between those cells).

       Server records are now indexed using the UUID of the server
       rather than the address since a server can have multiple
       addresses.

   (8) File server rotation is overhauled to handle VMOVED, VBUSY (and
       similar), VOFFLINE and VNOVOL indications and to handle rotation
       both of servers and addresses of those servers. The rotation will
       also wait and retry if the server says it is busy.

   (9) Data writeback is overhauled. Each inode no longer stores a list
       of modified sections tagged with the key that authorised it in
       favour of noting the modified region of a page in page->private
       and storing a list of keys that made modifications in the inode.

       This simplifies things and allows other keys to be used to
       actually write to the server if a key that made a modification
       becomes useless.

  (10) Writable mmap() is implemented. This allows a kernel to be build
       entirely on AFS.

  Note that Pre AFS-3.4 servers are no longer supported, though this can
  be added back if necessary (AFS-3.4 was released in 1998)"

* tag 'afs-next-20171113' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: (35 commits)
  afs: Protect call->state changes against signals
  afs: Trace page dirty/clean
  afs: Implement shared-writeable mmap
  afs: Get rid of the afs_writeback record
  afs: Introduce a file-private data record
  afs: Use a dynamic port if 7001 is in use
  afs: Fix directory read/modify race
  afs: Trace the sending of pages
  afs: Trace the initiation and completion of client calls
  afs: Fix documentation on # vs % prefix in mount source specification
  afs: Fix total-length calculation for multiple-page send
  afs: Only progress call state at end of Tx phase from rxrpc callback
  afs: Make use of the YFS service upgrade to fully support IPv6
  afs: Overhaul volume and server record caching and fileserver rotation
  afs: Move server rotation code into its own file
  afs: Add an address list concept
  afs: Overhaul cell database management
  afs: Overhaul permit caching
  afs: Overhaul the callback handling
  afs: Rename struct afs_call server member to cm_server
  ...

1 files changed, 272 insertions, 189 deletions

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 613a77058263..ab618d32554c 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -130,10 +130,11 @@ struct afs_lookup_cookie {
 /*
  * check that a directory page is valid
  */
-static inline bool afs_dir_check_page(struct inode *dir, struct page *page)
+bool afs_dir_check_page(struct inode *dir, struct page *page)
 {
 	struct afs_dir_page *dbuf;
-	loff_t latter;
+	struct afs_vnode *vnode = AFS_FS_I(dir);
+	loff_t latter, i_size, off;
 	int tmp, qty;
 
 #if 0
@@ -150,8 +151,15 @@ static inline bool afs_dir_check_page(struct inode *dir, struct page *page)
 	}
 #endif
 
-	/* determine how many magic numbers there should be in this page */
-	latter = dir->i_size - page_offset(page);
+	/* Determine how many magic numbers there should be in this page, but
+	 * we must take care because the directory may change size under us.
+	 */
+	off = page_offset(page);
+	i_size = i_size_read(dir);
+	if (i_size <= off)
+		goto checked;
+
+	latter = i_size - off;
 	if (latter >= PAGE_SIZE)
 		qty = PAGE_SIZE;
 	else
@@ -162,13 +170,15 @@ static inline bool afs_dir_check_page(struct inode *dir, struct page *page)
 	dbuf = page_address(page);
 	for (tmp = 0; tmp < qty; tmp++) {
 		if (dbuf->blocks[tmp].pagehdr.magic != AFS_DIR_MAGIC) {
-			printk("kAFS: %s(%lu): bad magic %d/%d is %04hx\n",
+			printk("kAFS: %s(%lx): bad magic %d/%d is %04hx\n",
 			       __func__, dir->i_ino, tmp, qty,
 			       ntohs(dbuf->blocks[tmp].pagehdr.magic));
+			trace_afs_dir_check_failed(vnode, off, i_size);
 			goto error;
 		}
 	}
 
+checked:
 	SetPageChecked(page);
 	return true;
 
@@ -183,6 +193,7 @@ error:
 static inline void afs_dir_put_page(struct page *page)
 {
 	kunmap(page);
+	unlock_page(page);
 	put_page(page);
 }
 
@@ -197,9 +208,10 @@ static struct page *afs_dir_get_page(struct inode *dir, unsigned long index,
 
 	page = read_cache_page(dir->i_mapping, index, afs_page_filler, key);
 	if (!IS_ERR(page)) {
+		lock_page(page);
 		kmap(page);
 		if (unlikely(!PageChecked(page))) {
-			if (PageError(page) || !afs_dir_check_page(dir, page))
+			if (PageError(page))
 				goto fail;
 		}
 	}
@@ -384,8 +396,7 @@ out:
  */
 static int afs_readdir(struct file *file, struct dir_context *ctx)
 {
-	return afs_dir_iterate(file_inode(file), 
-			      ctx, file->private_data);
+	return afs_dir_iterate(file_inode(file), ctx, afs_file_key(file));
 }
 
 /*
@@ -553,7 +564,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
 	dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version;
 
 	/* instantiate the dentry */
-	inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL);
+	inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL, NULL);
 	key_put(key);
 	if (IS_ERR(inode)) {
 		_leave(" = %ld", PTR_ERR(inode));
@@ -581,6 +592,7 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 	struct afs_vnode *vnode, *dir;
 	struct afs_fid uninitialized_var(fid);
 	struct dentry *parent;
+	struct inode *inode;
 	struct key *key;
 	void *dir_version;
 	int ret;
@@ -588,30 +600,39 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 	if (flags & LOOKUP_RCU)
 		return -ECHILD;
 
-	vnode = AFS_FS_I(d_inode(dentry));
-
-	if (d_really_is_positive(dentry))
+	if (d_really_is_positive(dentry)) {
+		vnode = AFS_FS_I(d_inode(dentry));
 		_enter("{v={%x:%u} n=%pd fl=%lx},",
 		       vnode->fid.vid, vnode->fid.vnode, dentry,
 		       vnode->flags);
-	else
+	} else {
 		_enter("{neg n=%pd}", dentry);
+	}
 
 	key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell);
 	if (IS_ERR(key))
 		key = NULL;
 
+	if (d_really_is_positive(dentry)) {
+		inode = d_inode(dentry);
+		if (inode) {
+			vnode = AFS_FS_I(inode);
+			afs_validate(vnode, key);
+			if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+				goto out_bad;
+		}
+	}
+
 	/* lock down the parent dentry so we can peer at it */
 	parent = dget_parent(dentry);
 	dir = AFS_FS_I(d_inode(parent));
 
 	/* validate the parent directory */
-	if (test_bit(AFS_VNODE_MODIFIED, &dir->flags))
-		afs_validate(dir, key);
+	afs_validate(dir, key);
 
 	if (test_bit(AFS_VNODE_DELETED, &dir->flags)) {
 		_debug("%pd: parent dir deleted", dentry);
-		goto out_bad;
+		goto out_bad_parent;
 	}
 
 	dir_version = (void *) (unsigned long) dir->status.data_version;
@@ -626,13 +647,16 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 	case 0:
 		/* the filename maps to something */
 		if (d_really_is_negative(dentry))
-			goto out_bad;
-		if (is_bad_inode(d_inode(dentry))) {
+			goto out_bad_parent;
+		inode = d_inode(dentry);
+		if (is_bad_inode(inode)) {
 			printk("kAFS: afs_d_revalidate: %pd2 has bad inode\n",
 			       dentry);
-			goto out_bad;
+			goto out_bad_parent;
 		}
 
+		vnode = AFS_FS_I(inode);
+
 		/* if the vnode ID has changed, then the dirent points to a
 		 * different file */
 		if (fid.vnode != vnode->fid.vnode) {
@@ -649,10 +673,10 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 			_debug("%pd: file deleted (uq %u -> %u I:%u)",
 			       dentry, fid.unique,
 			       vnode->fid.unique,
-			       d_inode(dentry)->i_generation);
-			spin_lock(&vnode->lock);
+			       vnode->vfs_inode.i_generation);
+			write_seqlock(&vnode->cb_lock);
 			set_bit(AFS_VNODE_DELETED, &vnode->flags);
-			spin_unlock(&vnode->lock);
+			write_sequnlock(&vnode->cb_lock);
 			goto not_found;
 		}
 		goto out_valid;
@@ -667,7 +691,7 @@ static int afs_d_revalidate(struct dentry *dentry, unsigned int flags)
 	default:
 		_debug("failed to iterate dir %pd: %d",
 		       parent, ret);
-		goto out_bad;
+		goto out_bad_parent;
 	}
 
 out_valid:
@@ -683,9 +707,10 @@ not_found:
 	dentry->d_flags |= DCACHE_NFSFS_RENAMED;
 	spin_unlock(&dentry->d_lock);
 
-out_bad:
+out_bad_parent:
 	_debug("dropping dentry %pd2", dentry);
 	dput(parent);
+out_bad:
 	key_put(key);
 
 	_leave(" = 0 [bad]");
@@ -727,20 +752,48 @@ static void afs_d_release(struct dentry *dentry)
 }
 
 /*
+ * Create a new inode for create/mkdir/symlink
+ */
+static void afs_vnode_new_inode(struct afs_fs_cursor *fc,
+				struct dentry *new_dentry,
+				struct afs_fid *newfid,
+				struct afs_file_status *newstatus,
+				struct afs_callback *newcb)
+{
+	struct inode *inode;
+
+	if (fc->ac.error < 0)
+		return;
+
+	inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key,
+			 newfid, newstatus, newcb, fc->cbi);
+	if (IS_ERR(inode)) {
+		/* ENOMEM or EINTR at a really inconvenient time - just abandon
+		 * the new directory on the server.
+		 */
+		fc->ac.error = PTR_ERR(inode);
+		return;
+	}
+
+	d_instantiate(new_dentry, inode);
+	if (d_unhashed(new_dentry))
+		d_rehash(new_dentry);
+}
+
+/*
  * create a directory on an AFS filesystem
  */
 static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
-	struct afs_file_status status;
-	struct afs_callback cb;
-	struct afs_server *server;
-	struct afs_vnode *dvnode, *vnode;
-	struct afs_fid fid;
-	struct inode *inode;
+	struct afs_file_status newstatus;
+	struct afs_fs_cursor fc;
+	struct afs_callback newcb;
+	struct afs_vnode *dvnode = AFS_FS_I(dir);
+	struct afs_fid newfid;
 	struct key *key;
 	int ret;
 
-	dvnode = AFS_FS_I(dir);
+	mode |= S_IFDIR;
 
 	_enter("{%x:%u},{%pd},%ho",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry, mode);
@@ -751,40 +804,27 @@ static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 		goto error;
 	}
 
-	mode |= S_IFDIR;
-	ret = afs_vnode_create(dvnode, key, dentry->d_name.name,
-			       mode, &fid, &status, &cb, &server);
-	if (ret < 0)
-		goto mkdir_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = dvnode->cb_break + dvnode->cb_s_break;
+			afs_fs_create(&fc, dentry->d_name.name, mode,
+				      &newfid, &newstatus, &newcb);
+		}
 
-	inode = afs_iget(dir->i_sb, key, &fid, &status, &cb);
-	if (IS_ERR(inode)) {
-		/* ENOMEM at a really inconvenient time - just abandon the new
-		 * directory on the server */
-		ret = PTR_ERR(inode);
-		goto iget_error;
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret < 0)
+			goto error_key;
 	}
 
-	/* apply the status report we've got for the new vnode */
-	vnode = AFS_FS_I(inode);
-	spin_lock(&vnode->lock);
-	vnode->update_cnt++;
-	spin_unlock(&vnode->lock);
-	afs_vnode_finalise_status_update(vnode, server);
-	afs_put_server(server);
-
-	d_instantiate(dentry, inode);
-	if (d_unhashed(dentry)) {
-		_debug("not hashed");
-		d_rehash(dentry);
-	}
 	key_put(key);
 	_leave(" = 0");
 	return 0;
 
-iget_error:
-	afs_put_server(server);
-mkdir_error:
+error_key:
 	key_put(key);
 error:
 	d_drop(dentry);
@@ -793,16 +833,29 @@ error:
 }
 
 /*
+ * Remove a subdir from a directory.
+ */
+static void afs_dir_remove_subdir(struct dentry *dentry)
+{
+	if (d_really_is_positive(dentry)) {
+		struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
+
+		clear_nlink(&vnode->vfs_inode);
+		set_bit(AFS_VNODE_DELETED, &vnode->flags);
+		clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+	}
+}
+
+/*
  * remove a directory from an AFS filesystem
  */
 static int afs_rmdir(struct inode *dir, struct dentry *dentry)
 {
-	struct afs_vnode *dvnode, *vnode;
+	struct afs_fs_cursor fc;
+	struct afs_vnode *dvnode = AFS_FS_I(dir);
 	struct key *key;
 	int ret;
 
-	dvnode = AFS_FS_I(dir);
-
 	_enter("{%x:%u},{%pd}",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry);
 
@@ -812,45 +865,69 @@ static int afs_rmdir(struct inode *dir, struct dentry *dentry)
 		goto error;
 	}
 
-	ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true);
-	if (ret < 0)
-		goto rmdir_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = dvnode->cb_break + dvnode->cb_s_break;
+			afs_fs_remove(&fc, dentry->d_name.name, true);
+		}
 
-	if (d_really_is_positive(dentry)) {
-		vnode = AFS_FS_I(d_inode(dentry));
-		clear_nlink(&vnode->vfs_inode);
-		set_bit(AFS_VNODE_DELETED, &vnode->flags);
-		afs_discard_callback_on_delete(vnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret == 0)
+			afs_dir_remove_subdir(dentry);
 	}
 
 	key_put(key);
-	_leave(" = 0");
-	return 0;
-
-rmdir_error:
-	key_put(key);
 error:
-	_leave(" = %d", ret);
 	return ret;
 }
 
 /*
- * remove a file from an AFS filesystem
+ * Remove a link to a file or symlink from a directory.
+ *
+ * If the file was not deleted due to excess hard links, the fileserver will
+ * break the callback promise on the file - if it had one - before it returns
+ * to us, and if it was deleted, it won't
+ *
+ * However, if we didn't have a callback promise outstanding, or it was
+ * outstanding on a different server, then it won't break it either...
+ */
+static int afs_dir_remove_link(struct dentry *dentry, struct key *key)
+{
+	int ret = 0;
+
+	if (d_really_is_positive(dentry)) {
+		struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
+
+		if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+			kdebug("AFS_VNODE_DELETED");
+		clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+
+		ret = afs_validate(vnode, key);
+		if (ret == -ESTALE)
+			ret = 0;
+		_debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret);
+	}
+
+	return ret;
+}
+
+/*
+ * Remove a file or symlink from an AFS filesystem.
  */
 static int afs_unlink(struct inode *dir, struct dentry *dentry)
 {
-	struct afs_vnode *dvnode, *vnode;
+	struct afs_fs_cursor fc;
+	struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode;
 	struct key *key;
 	int ret;
 
-	dvnode = AFS_FS_I(dir);
-
 	_enter("{%x:%u},{%pd}",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry);
 
-	ret = -ENAMETOOLONG;
 	if (dentry->d_name.len >= AFSNAMEMAX)
-		goto error;
+		return -ENAMETOOLONG;
 
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
@@ -858,44 +935,28 @@ static int afs_unlink(struct inode *dir, struct dentry *dentry)
 		goto error;
 	}
 
+	/* Try to make sure we have a callback promise on the victim. */
 	if (d_really_is_positive(dentry)) {
 		vnode = AFS_FS_I(d_inode(dentry));
-
-		/* make sure we have a callback promise on the victim */
 		ret = afs_validate(vnode, key);
 		if (ret < 0)
-			goto error;
+			goto error_key;
 	}
 
-	ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, false);
-	if (ret < 0)
-		goto remove_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = dvnode->cb_break + dvnode->cb_s_break;
+			afs_fs_remove(&fc, dentry->d_name.name, false);
+		}
 
-	if (d_really_is_positive(dentry)) {
-		/* if the file wasn't deleted due to excess hard links, the
-		 * fileserver will break the callback promise on the file - if
-		 * it had one - before it returns to us, and if it was deleted,
-		 * it won't
-		 *
-		 * however, if we didn't have a callback promise outstanding,
-		 * or it was outstanding on a different server, then it won't
-		 * break it either...
-		 */
-		vnode = AFS_FS_I(d_inode(dentry));
-		if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
-			_debug("AFS_VNODE_DELETED");
-		if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags))
-			_debug("AFS_VNODE_CB_BROKEN");
-		set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
-		ret = afs_validate(vnode, key);
-		_debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret == 0)
+			ret = afs_dir_remove_link(dentry, key);
 	}
 
-	key_put(key);
-	_leave(" = 0");
-	return 0;
-
-remove_error:
+error_key:
 	key_put(key);
 error:
 	_leave(" = %d", ret);
@@ -908,60 +969,50 @@ error:
 static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 		      bool excl)
 {
-	struct afs_file_status status;
-	struct afs_callback cb;
-	struct afs_server *server;
-	struct afs_vnode *dvnode, *vnode;
-	struct afs_fid fid;
-	struct inode *inode;
+	struct afs_fs_cursor fc;
+	struct afs_file_status newstatus;
+	struct afs_callback newcb;
+	struct afs_vnode *dvnode = dvnode = AFS_FS_I(dir);
+	struct afs_fid newfid;
 	struct key *key;
 	int ret;
 
-	dvnode = AFS_FS_I(dir);
+	mode |= S_IFREG;
 
 	_enter("{%x:%u},{%pd},%ho,",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry, mode);
 
+	ret = -ENAMETOOLONG;
+	if (dentry->d_name.len >= AFSNAMEMAX)
+		goto error;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
 		goto error;
 	}
 
-	mode |= S_IFREG;
-	ret = afs_vnode_create(dvnode, key, dentry->d_name.name,
-			       mode, &fid, &status, &cb, &server);
-	if (ret < 0)
-		goto create_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = dvnode->cb_break + dvnode->cb_s_break;
+			afs_fs_create(&fc, dentry->d_name.name, mode,
+				      &newfid, &newstatus, &newcb);
+		}
 
-	inode = afs_iget(dir->i_sb, key, &fid, &status, &cb);
-	if (IS_ERR(inode)) {
-		/* ENOMEM at a really inconvenient time - just abandon the new
-		 * directory on the server */
-		ret = PTR_ERR(inode);
-		goto iget_error;
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret < 0)
+			goto error_key;
 	}
 
-	/* apply the status report we've got for the new vnode */
-	vnode = AFS_FS_I(inode);
-	spin_lock(&vnode->lock);
-	vnode->update_cnt++;
-	spin_unlock(&vnode->lock);
-	afs_vnode_finalise_status_update(vnode, server);
-	afs_put_server(server);
-
-	d_instantiate(dentry, inode);
-	if (d_unhashed(dentry)) {
-		_debug("not hashed");
-		d_rehash(dentry);
-	}
 	key_put(key);
 	_leave(" = 0");
 	return 0;
 
-iget_error:
-	afs_put_server(server);
-create_error:
+error_key:
 	key_put(key);
 error:
 	d_drop(dentry);
@@ -975,6 +1026,7 @@ error:
 static int afs_link(struct dentry *from, struct inode *dir,
 		    struct dentry *dentry)
 {
+	struct afs_fs_cursor fc;
 	struct afs_vnode *dvnode, *vnode;
 	struct key *key;
 	int ret;
@@ -987,23 +1039,45 @@ static int afs_link(struct dentry *from, struct inode *dir,
 	       dvnode->fid.vid, dvnode->fid.vnode,
 	       dentry);
 
+	ret = -ENAMETOOLONG;
+	if (dentry->d_name.len >= AFSNAMEMAX)
+		goto error;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
 		goto error;
 	}
 
-	ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name);
-	if (ret < 0)
-		goto link_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+		if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) {
+			afs_end_vnode_operation(&fc);
+			return -ERESTARTSYS;
+		}
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = dvnode->cb_break + dvnode->cb_s_break;
+			fc.cb_break_2 = vnode->cb_break + vnode->cb_s_break;
+			afs_fs_link(&fc, vnode, dentry->d_name.name);
+		}
+
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break_2);
+		ihold(&vnode->vfs_inode);
+		d_instantiate(dentry, &vnode->vfs_inode);
+
+		mutex_unlock(&vnode->io_lock);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret < 0)
+			goto error_key;
+	}
 
-	ihold(&vnode->vfs_inode);
-	d_instantiate(dentry, &vnode->vfs_inode);
 	key_put(key);
 	_leave(" = 0");
 	return 0;
 
-link_error:
+error_key:
 	key_put(key);
 error:
 	d_drop(dentry);
@@ -1017,20 +1091,21 @@ error:
 static int afs_symlink(struct inode *dir, struct dentry *dentry,
 		       const char *content)
 {
-	struct afs_file_status status;
-	struct afs_server *server;
-	struct afs_vnode *dvnode, *vnode;
-	struct afs_fid fid;
-	struct inode *inode;
+	struct afs_fs_cursor fc;
+	struct afs_file_status newstatus;
+	struct afs_vnode *dvnode = AFS_FS_I(dir);
+	struct afs_fid newfid;
 	struct key *key;
 	int ret;
 
-	dvnode = AFS_FS_I(dir);
-
 	_enter("{%x:%u},{%pd},%s",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry,
 	       content);
 
+	ret = -ENAMETOOLONG;
+	if (dentry->d_name.len >= AFSNAMEMAX)
+		goto error;
+
 	ret = -EINVAL;
 	if (strlen(content) >= AFSPATHMAX)
 		goto error;
@@ -1041,39 +1116,27 @@ static int afs_symlink(struct inode *dir, struct dentry *dentry,
 		goto error;
 	}
 
-	ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content,
-				&fid, &status, &server);
-	if (ret < 0)
-		goto create_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = dvnode->cb_break + dvnode->cb_s_break;
+			afs_fs_symlink(&fc, dentry->d_name.name, content,
+				       &newfid, &newstatus);
+		}
 
-	inode = afs_iget(dir->i_sb, key, &fid, &status, NULL);
-	if (IS_ERR(inode)) {
-		/* ENOMEM at a really inconvenient time - just abandon the new
-		 * directory on the server */
-		ret = PTR_ERR(inode);
-		goto iget_error;
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret < 0)
+			goto error_key;
 	}
 
-	/* apply the status report we've got for the new vnode */
-	vnode = AFS_FS_I(inode);
-	spin_lock(&vnode->lock);
-	vnode->update_cnt++;
-	spin_unlock(&vnode->lock);
-	afs_vnode_finalise_status_update(vnode, server);
-	afs_put_server(server);
-
-	d_instantiate(dentry, inode);
-	if (d_unhashed(dentry)) {
-		_debug("not hashed");
-		d_rehash(dentry);
-	}
 	key_put(key);
 	_leave(" = 0");
 	return 0;
 
-iget_error:
-	afs_put_server(server);
-create_error:
+error_key:
 	key_put(key);
 error:
 	d_drop(dentry);
@@ -1088,6 +1151,7 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		      struct inode *new_dir, struct dentry *new_dentry,
 		      unsigned int flags)
 {
+	struct afs_fs_cursor fc;
 	struct afs_vnode *orig_dvnode, *new_dvnode, *vnode;
 	struct key *key;
 	int ret;
@@ -1111,16 +1175,35 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		goto error;
 	}
 
-	ret = afs_vnode_rename(orig_dvnode, new_dvnode, key,
-			       old_dentry->d_name.name,
-			       new_dentry->d_name.name);
-	if (ret < 0)
-		goto rename_error;
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) {
+		if (orig_dvnode != new_dvnode) {
+			if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) {
+				afs_end_vnode_operation(&fc);
+				return -ERESTARTSYS;
+			}
+		}
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = orig_dvnode->cb_break + orig_dvnode->cb_s_break;
+			fc.cb_break_2 = new_dvnode->cb_break + new_dvnode->cb_s_break;
+			afs_fs_rename(&fc, old_dentry->d_name.name,
+				      new_dvnode, new_dentry->d_name.name);
+		}
+
+		afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break);
+		afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2);
+		if (orig_dvnode != new_dvnode)
+			mutex_unlock(&new_dvnode->io_lock);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret < 0)
+			goto error_key;
+	}
+
 	key_put(key);
 	_leave(" = 0");
 	return 0;
 
-rename_error:
+error_key:
 	key_put(key);
 error:
 	d_drop(new_dentry);