Merge tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull AFS updates from David Howells:
 "A set of fix and development patches for AFS for 5.2.

  Summary:

   - Fix the AFS file locking so that sqlite can run on an AFS mount and
     also so that firefox and gnome can use a homedir that's mounted
     through AFS.

     This required emulation of fine-grained locking when the server
     will only support whole-file locks and no upgrade/downgrade. Four
     modes are provided, settable by mount parameter:

       "flock=local"   - No reference to the server

       "flock=openafs" - Fine-grained locks are local-only, whole-file
                         locks require sufficient server locks

       "flock=strict"  - All locks require sufficient server locks

       "flock=write"   - Always get an exclusive server lock

     If the volume is a read-only or backup volume, then flock=local for
     that volume.

   - Log extra information for a couple of cases where the client mucks
     up somehow: AFS vnode with undefined type and dir check failure -
     in both cases we seem to end up with unfilled data, but the issues
     happen infrequently and are difficult to reproduce at will.

   - Implement silly rename for unlink() and rename().

   - Set i_blocks so that du can get some information about usage.

   - Fix xattr handlers to return the right amount of data and to not
     overflow buffers.

   - Implement getting/setting raw AFS and YFS ACLs as xattrs"

* tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Implement YFS ACL setting
  afs: Get YFS ACLs and information through xattrs
  afs: implement acl setting
  afs: Get an AFS3 ACL as an xattr
  afs: Fix getting the afs.fid xattr
  afs: Fix the afs.cell and afs.volume xattr handlers
  afs: Calculate i_blocks based on file size
  afs: Log more information for "kAFS: AFS vnode with undefined type\n"
  afs: Provide mount-time configurable byte-range file locking emulation
  afs: Add more tracepoints
  afs: Implement sillyrename for unlink and rename
  afs: Add directory reload tracepoint
  afs: Handle lock rpc ops failing on a file that got deleted
  afs: Improve dir check failure reports
  afs: Add file locking tracepoints
  afs: Further fix file locking
  afs: Fix AFS file locking to allow fine grained locks
  afs: Calculate lock extend timer from set/extend reply reception
  afs: Split wait from afs_make_call()

2 files changed, 381 insertions, 5 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 49d048ea0afb..0fa5b47509d5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1098,6 +1098,7 @@ struct file_lock {
 		struct {
 			struct list_head link;	/* link in AFS vnode's pending_locks list */
 			int state;		/* state of grant or error if -ve */
+			unsigned int	debug_id;
 		} afs;
 	} fl_u;
 } __randomize_layout;
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index e3f005eae1f7..562f854ac4bf 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h
@@ -33,8 +33,10 @@ enum afs_call_trace {
 
 enum afs_fs_operation {
 	afs_FS_FetchData		= 130,	/* AFS Fetch file data */
+	afs_FS_FetchACL			= 131,	/* AFS Fetch file ACL */
 	afs_FS_FetchStatus		= 132,	/* AFS Fetch file status */
 	afs_FS_StoreData		= 133,	/* AFS Store file data */
+	afs_FS_StoreACL			= 134,	/* AFS Store file ACL */
 	afs_FS_StoreStatus		= 135,	/* AFS Store file status */
 	afs_FS_RemoveFile		= 136,	/* AFS Remove a file */
 	afs_FS_CreateFile		= 137,	/* AFS Create a file */
@@ -108,8 +110,12 @@ enum afs_edit_dir_reason {
 	afs_edit_dir_for_create,
 	afs_edit_dir_for_link,
 	afs_edit_dir_for_mkdir,
-	afs_edit_dir_for_rename,
+	afs_edit_dir_for_rename_0,
+	afs_edit_dir_for_rename_1,
+	afs_edit_dir_for_rename_2,
 	afs_edit_dir_for_rmdir,
+	afs_edit_dir_for_silly_0,
+	afs_edit_dir_for_silly_1,
 	afs_edit_dir_for_symlink,
 	afs_edit_dir_for_unlink,
 };
@@ -152,6 +158,43 @@ enum afs_file_error {
 	afs_file_error_writeback_fail,
 };
 
+enum afs_flock_event {
+	afs_flock_acquired,
+	afs_flock_callback_break,
+	afs_flock_defer_unlock,
+	afs_flock_extend_fail,
+	afs_flock_fail_other,
+	afs_flock_fail_perm,
+	afs_flock_no_lockers,
+	afs_flock_release_fail,
+	afs_flock_silly_delete,
+	afs_flock_timestamp,
+	afs_flock_try_to_lock,
+	afs_flock_vfs_lock,
+	afs_flock_vfs_locking,
+	afs_flock_waited,
+	afs_flock_waiting,
+	afs_flock_work_extending,
+	afs_flock_work_retry,
+	afs_flock_work_unlocking,
+	afs_flock_would_block,
+};
+
+enum afs_flock_operation {
+	afs_flock_op_copy_lock,
+	afs_flock_op_flock,
+	afs_flock_op_grant,
+	afs_flock_op_lock,
+	afs_flock_op_release_lock,
+	afs_flock_op_return_ok,
+	afs_flock_op_return_eagain,
+	afs_flock_op_return_edeadlk,
+	afs_flock_op_return_error,
+	afs_flock_op_set_lock,
+	afs_flock_op_unlock,
+	afs_flock_op_wake,
+};
+
 #endif /* end __AFS_DECLARE_TRACE_ENUMS_ONCE_ONLY */
 
 /*
@@ -237,8 +280,12 @@ enum afs_file_error {
 	EM(afs_edit_dir_for_create,		"Create") \
 	EM(afs_edit_dir_for_link,		"Link  ") \
 	EM(afs_edit_dir_for_mkdir,		"MkDir ") \
-	EM(afs_edit_dir_for_rename,		"Rename") \
+	EM(afs_edit_dir_for_rename_0,		"Renam0") \
+	EM(afs_edit_dir_for_rename_1,		"Renam1") \
+	EM(afs_edit_dir_for_rename_2,		"Renam2") \
 	EM(afs_edit_dir_for_rmdir,		"RmDir ") \
+	EM(afs_edit_dir_for_silly_0,		"S_Ren0") \
+	EM(afs_edit_dir_for_silly_1,		"S_Ren1") \
 	EM(afs_edit_dir_for_symlink,		"Symlnk") \
 	E_(afs_edit_dir_for_unlink,		"Unlink")
 
@@ -277,6 +324,56 @@ enum afs_file_error {
 	EM(afs_file_error_mntpt,		"MNTPT_READ_FAILED")	\
 	E_(afs_file_error_writeback_fail,	"WRITEBACK_FAILED")
 
+#define afs_flock_types							\
+	EM(F_RDLCK,				"RDLCK")		\
+	EM(F_WRLCK,				"WRLCK")		\
+	E_(F_UNLCK,				"UNLCK")
+
+#define afs_flock_states						\
+	EM(AFS_VNODE_LOCK_NONE,			"NONE")			\
+	EM(AFS_VNODE_LOCK_WAITING_FOR_CB,	"WAIT_FOR_CB")		\
+	EM(AFS_VNODE_LOCK_SETTING,		"SETTING")		\
+	EM(AFS_VNODE_LOCK_GRANTED,		"GRANTED")		\
+	EM(AFS_VNODE_LOCK_EXTENDING,		"EXTENDING")		\
+	EM(AFS_VNODE_LOCK_NEED_UNLOCK,		"NEED_UNLOCK")		\
+	EM(AFS_VNODE_LOCK_UNLOCKING,		"UNLOCKING")		\
+	E_(AFS_VNODE_LOCK_DELETED,		"DELETED")
+
+#define afs_flock_events						\
+	EM(afs_flock_acquired,			"Acquired")		\
+	EM(afs_flock_callback_break,		"Callback")		\
+	EM(afs_flock_defer_unlock,		"D-Unlock")		\
+	EM(afs_flock_extend_fail,		"Ext_Fail")		\
+	EM(afs_flock_fail_other,		"ErrOther")		\
+	EM(afs_flock_fail_perm,			"ErrPerm ")		\
+	EM(afs_flock_no_lockers,		"NoLocker")		\
+	EM(afs_flock_release_fail,		"Rel_Fail")		\
+	EM(afs_flock_silly_delete,		"SillyDel")		\
+	EM(afs_flock_timestamp,			"Timestmp")		\
+	EM(afs_flock_try_to_lock,		"TryToLck")		\
+	EM(afs_flock_vfs_lock,			"VFSLock ")		\
+	EM(afs_flock_vfs_locking,		"VFSLking")		\
+	EM(afs_flock_waited,			"Waited  ")		\
+	EM(afs_flock_waiting,			"Waiting ")		\
+	EM(afs_flock_work_extending,		"Extendng")		\
+	EM(afs_flock_work_retry,		"Retry   ")		\
+	EM(afs_flock_work_unlocking,		"Unlcking")		\
+	E_(afs_flock_would_block,		"EWOULDBL")
+
+#define afs_flock_operations						\
+	EM(afs_flock_op_copy_lock,		"COPY    ")		\
+	EM(afs_flock_op_flock,			"->flock ")		\
+	EM(afs_flock_op_grant,			"GRANT   ")		\
+	EM(afs_flock_op_lock,			"->lock  ")		\
+	EM(afs_flock_op_release_lock,		"RELEASE ")		\
+	EM(afs_flock_op_return_ok,		"<-OK    ")		\
+	EM(afs_flock_op_return_edeadlk,		"<-EDEADL")		\
+	EM(afs_flock_op_return_eagain,		"<-EAGAIN")		\
+	EM(afs_flock_op_return_error,		"<-ERROR ")		\
+	EM(afs_flock_op_set_lock,		"SET     ")		\
+	EM(afs_flock_op_unlock,			"UNLOCK  ")		\
+	E_(afs_flock_op_wake,			"WAKE    ")
+
 /*
  * Export enum symbols via userspace.
  */
@@ -293,6 +390,8 @@ afs_edit_dir_reasons;
 afs_eproto_causes;
 afs_io_errors;
 afs_file_errors;
+afs_flock_types;
+afs_flock_operations;
 
 /*
  * Now redefine the EM() and E_() macros to map the enums to the strings that
@@ -442,6 +541,123 @@ TRACE_EVENT(afs_make_fs_call,
 		      __print_symbolic(__entry->op, afs_fs_operations))
 	    );
 
+TRACE_EVENT(afs_make_fs_calli,
+	    TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
+		     unsigned int i),
+
+	    TP_ARGS(call, fid, i),
+
+	    TP_STRUCT__entry(
+		    __field(unsigned int,		call		)
+		    __field(unsigned int,		i		)
+		    __field(enum afs_fs_operation,	op		)
+		    __field_struct(struct afs_fid,	fid		)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->call = call->debug_id;
+		    __entry->i = i;
+		    __entry->op = call->operation_ID;
+		    if (fid) {
+			    __entry->fid = *fid;
+		    } else {
+			    __entry->fid.vid = 0;
+			    __entry->fid.vnode = 0;
+			    __entry->fid.unique = 0;
+		    }
+			   ),
+
+	    TP_printk("c=%08x %06llx:%06llx:%06x %s i=%u",
+		      __entry->call,
+		      __entry->fid.vid,
+		      __entry->fid.vnode,
+		      __entry->fid.unique,
+		      __print_symbolic(__entry->op, afs_fs_operations),
+		      __entry->i)
+	    );
+
+TRACE_EVENT(afs_make_fs_call1,
+	    TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
+		     const char *name),
+
+	    TP_ARGS(call, fid, name),
+
+	    TP_STRUCT__entry(
+		    __field(unsigned int,		call		)
+		    __field(enum afs_fs_operation,	op		)
+		    __field_struct(struct afs_fid,	fid		)
+		    __array(char,			name, 24	)
+			     ),
+
+	    TP_fast_assign(
+		    int __len = strlen(name);
+		    __len = min(__len, 23);
+		    __entry->call = call->debug_id;
+		    __entry->op = call->operation_ID;
+		    if (fid) {
+			    __entry->fid = *fid;
+		    } else {
+			    __entry->fid.vid = 0;
+			    __entry->fid.vnode = 0;
+			    __entry->fid.unique = 0;
+		    }
+		    memcpy(__entry->name, name, __len);
+		    __entry->name[__len] = 0;
+			   ),
+
+	    TP_printk("c=%08x %06llx:%06llx:%06x %s \"%s\"",
+		      __entry->call,
+		      __entry->fid.vid,
+		      __entry->fid.vnode,
+		      __entry->fid.unique,
+		      __print_symbolic(__entry->op, afs_fs_operations),
+		      __entry->name)
+	    );
+
+TRACE_EVENT(afs_make_fs_call2,
+	    TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
+		     const char *name, const char *name2),
+
+	    TP_ARGS(call, fid, name, name2),
+
+	    TP_STRUCT__entry(
+		    __field(unsigned int,		call		)
+		    __field(enum afs_fs_operation,	op		)
+		    __field_struct(struct afs_fid,	fid		)
+		    __array(char,			name, 24	)
+		    __array(char,			name2, 24	)
+			     ),
+
+	    TP_fast_assign(
+		    int __len = strlen(name);
+		    int __len2 = strlen(name2);
+		    __len = min(__len, 23);
+		    __len2 = min(__len2, 23);
+		    __entry->call = call->debug_id;
+		    __entry->op = call->operation_ID;
+		    if (fid) {
+			    __entry->fid = *fid;
+		    } else {
+			    __entry->fid.vid = 0;
+			    __entry->fid.vnode = 0;
+			    __entry->fid.unique = 0;
+		    }
+		    memcpy(__entry->name, name, __len);
+		    __entry->name[__len] = 0;
+		    memcpy(__entry->name2, name2, __len2);
+		    __entry->name2[__len2] = 0;
+			   ),
+
+	    TP_printk("c=%08x %06llx:%06llx:%06x %s \"%s\" \"%s\"",
+		      __entry->call,
+		      __entry->fid.vid,
+		      __entry->fid.vnode,
+		      __entry->fid.unique,
+		      __print_symbolic(__entry->op, afs_fs_operations),
+		      __entry->name,
+		      __entry->name2)
+	    );
+
 TRACE_EVENT(afs_make_vl_call,
 	    TP_PROTO(struct afs_call *call),
 
@@ -639,6 +855,38 @@ TRACE_EVENT(afs_call_state,
 		      __entry->ret, __entry->abort)
 	    );
 
+TRACE_EVENT(afs_lookup,
+	    TP_PROTO(struct afs_vnode *dvnode, const struct qstr *name,
+		     struct afs_vnode *vnode),
+
+	    TP_ARGS(dvnode, name, vnode),
+
+	    TP_STRUCT__entry(
+		    __field_struct(struct afs_fid,	dfid		)
+		    __field_struct(struct afs_fid,	fid		)
+		    __array(char,			name, 24	)
+			     ),
+
+	    TP_fast_assign(
+		    int __len = min_t(int, name->len, 23);
+		    __entry->dfid = dvnode->fid;
+		    if (vnode) {
+			    __entry->fid = vnode->fid;
+		    } else {
+			    __entry->fid.vid = 0;
+			    __entry->fid.vnode = 0;
+			    __entry->fid.unique = 0;
+		    }
+		    memcpy(__entry->name, name->name, __len);
+		    __entry->name[__len] = 0;
+			   ),
+
+	    TP_printk("d=%llx:%llx:%x \"%s\" f=%llx:%x",
+		      __entry->dfid.vid, __entry->dfid.vnode, __entry->dfid.unique,
+		      __entry->name,
+		      __entry->fid.vnode, __entry->fid.unique)
+	    );
+
 TRACE_EVENT(afs_edit_dir,
 	    TP_PROTO(struct afs_vnode *dvnode,
 		     enum afs_edit_dir_reason why,
@@ -660,12 +908,12 @@ TRACE_EVENT(afs_edit_dir,
 		    __field(unsigned short,		slot		)
 		    __field(unsigned int,		f_vnode		)
 		    __field(unsigned int,		f_unique	)
-		    __array(char,			name, 18	)
+		    __array(char,			name, 24	)
 			     ),
 
 	    TP_fast_assign(
 		    int __len = strlen(name);
-		    __len = min(__len, 17);
+		    __len = min(__len, 23);
 		    __entry->vnode	= dvnode->fid.vnode;
 		    __entry->unique	= dvnode->fid.unique;
 		    __entry->why	= why;
@@ -678,7 +926,7 @@ TRACE_EVENT(afs_edit_dir,
 		    __entry->name[__len] = 0;
 			   ),
 
-	    TP_printk("d=%x:%x %s %s %u[%u] f=%x:%x %s",
+	    TP_printk("d=%x:%x %s %s %u[%u] f=%x:%x \"%s\"",
 		      __entry->vnode, __entry->unique,
 		      __print_symbolic(__entry->why, afs_edit_dir_reasons),
 		      __print_symbolic(__entry->op, afs_edit_dir_ops),
@@ -796,6 +1044,133 @@ TRACE_EVENT(afs_cm_no_server_u,
 		      __entry->call, __entry->op_id, &__entry->uuid)
 	    );
 
+TRACE_EVENT(afs_flock_ev,
+	    TP_PROTO(struct afs_vnode *vnode, struct file_lock *fl,
+		     enum afs_flock_event event, int error),
+
+	    TP_ARGS(vnode, fl, event, error),
+
+	    TP_STRUCT__entry(
+		    __field_struct(struct afs_fid,	fid		)
+		    __field(enum afs_flock_event,	event		)
+		    __field(enum afs_lock_state,	state		)
+		    __field(int,			error		)
+		    __field(unsigned int,		debug_id	)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->fid = vnode->fid;
+		    __entry->event = event;
+		    __entry->state = vnode->lock_state;
+		    __entry->error = error;
+		    __entry->debug_id = fl ? fl->fl_u.afs.debug_id : 0;
+			   ),
+
+	    TP_printk("%llx:%llx:%x %04x %s s=%s e=%d",
+		      __entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
+		      __entry->debug_id,
+		      __print_symbolic(__entry->event, afs_flock_events),
+		      __print_symbolic(__entry->state, afs_flock_states),
+		      __entry->error)
+	    );
+
+TRACE_EVENT(afs_flock_op,
+	    TP_PROTO(struct afs_vnode *vnode, struct file_lock *fl,
+		     enum afs_flock_operation op),
+
+	    TP_ARGS(vnode, fl, op),
+
+	    TP_STRUCT__entry(
+		    __field_struct(struct afs_fid,	fid		)
+		    __field(loff_t,			from		)
+		    __field(loff_t,			len		)
+		    __field(enum afs_flock_operation,	op		)
+		    __field(unsigned char,		type		)
+		    __field(unsigned int,		flags		)
+		    __field(unsigned int,		debug_id	)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->fid = vnode->fid;
+		    __entry->from = fl->fl_start;
+		    __entry->len = fl->fl_end - fl->fl_start + 1;
+		    __entry->op = op;
+		    __entry->type = fl->fl_type;
+		    __entry->flags = fl->fl_flags;
+		    __entry->debug_id = fl->fl_u.afs.debug_id;
+			   ),
+
+	    TP_printk("%llx:%llx:%x %04x %s t=%s R=%llx/%llx f=%x",
+		      __entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
+		      __entry->debug_id,
+		      __print_symbolic(__entry->op, afs_flock_operations),
+		      __print_symbolic(__entry->type, afs_flock_types),
+		      __entry->from, __entry->len, __entry->flags)
+	    );
+
+TRACE_EVENT(afs_reload_dir,
+	    TP_PROTO(struct afs_vnode *vnode),
+
+	    TP_ARGS(vnode),
+
+	    TP_STRUCT__entry(
+		    __field_struct(struct afs_fid,	fid		)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->fid = vnode->fid;
+			   ),
+
+	    TP_printk("%llx:%llx:%x",
+		      __entry->fid.vid, __entry->fid.vnode, __entry->fid.unique)
+	    );
+
+TRACE_EVENT(afs_silly_rename,
+	    TP_PROTO(struct afs_vnode *vnode, bool done),
+
+	    TP_ARGS(vnode, done),
+
+	    TP_STRUCT__entry(
+		    __field_struct(struct afs_fid,	fid		)
+		    __field(bool,			done		)
+			     ),
+
+	    TP_fast_assign(
+		    __entry->fid = vnode->fid;
+		    __entry->done = done;
+			   ),
+
+	    TP_printk("%llx:%llx:%x done=%u",
+		      __entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
+		      __entry->done)
+	    );
+
+TRACE_EVENT(afs_get_tree,
+	    TP_PROTO(struct afs_cell *cell, struct afs_volume *volume),
+
+	    TP_ARGS(cell, volume),
+
+	    TP_STRUCT__entry(
+		    __field(u64,			vid		)
+		    __array(char,			cell, 24	)
+		    __array(char,			volume, 24	)
+			     ),
+
+	    TP_fast_assign(
+		    int __len;
+		    __entry->vid = volume->vid;
+		    __len = min_t(int, cell->name_len, 23);
+		    memcpy(__entry->cell, cell->name, __len);
+		    __entry->cell[__len] = 0;
+		    __len = min_t(int, volume->name_len, 23);
+		    memcpy(__entry->volume, volume->name, __len);
+		    __entry->volume[__len] = 0;
+			   ),
+
+	    TP_printk("--- MOUNT %s:%s %llx",
+		      __entry->cell, __entry->volume, __entry->vid)
+	    );
+
 #endif /* _TRACE_AFS_H */
 
 /* This part must be outside protection */