Filesystem services

fsp-ldr

Cmd	Name
0	MountCode
1	IsCodeMounted

fsp-pr

Cmd	Name
0	SetFsPermissions
1	ClearFsPermissions

fsp-srv

Cmd	Name
0	MountApplicationPackage
1	#Initialize
2	MountRomFs
7	#MountContent7
8	#MountContent
11	#MountBis
12	#OpenBisPartition
13	InvalidateBisCache
17	OpenHostFileSystemImpl
18	MountSdCard
19	FormatSdCard
21	DeleteSaveData
22	#CreateSaveData
23	#CreateSystemSaveData
24	RegisterSaveDataAtomicDeletion
25
26	FormatSdCardDryRun
27
30	OpenGameCardPartition
31	MountGameCardPartition
51	#MountSavedata
52	#MountSystemSaveData
53	Returns an #IFileSystem.
58	ReadSaveDataFileSystemExtraData
59
60	OpenSaveDataInfoReader
61	OpenSaveDataIterator
80	OpenSaveDataThumbnailFile
100	MountImageDirectory
110	#MountContentStorage
200	OpenHost
202	OpenDataStorageByDataId
203	Returns an #IStorage.
400	#OpenDeviceOperator
500	#OpenSdCardDetectionEventNotifier
501	#OpenGameCardDetectionEventNotifier
600	SetCurrentPosixTime
601	QuerySaveDataTotalSize
602	VerifySaveData
603	CorruptSaveDataForDebug
604	CreatePaddingFile
605	DeleteAllPaddingFiles
606
607	RegisterExternalKey
608	UnregisterExternalKey
609
620
800
1000	SetBisRootForHost
1001
1002	SetSaveDataRootPath
1003	DisableAutoSaveDataCreation
1004	SetGlobalAccessLogMode
1005	GetGlobalAccessLogMode
1006	OutputAccessLogToSdCard

MountApplicationPackage

Presumably about the same as MountContent except this uses the titleID associated with the FS session?

Initialize

Word	Value
0	0x00000004
1	0x8000000E
2	0x00000001
0-1	Pid
0	Always. 0x18000001
1	Always. 0
2	"SCFI"
3	0x00000001
4	Always 0.

MountContent7

Takes an input u32 (NCA-type) and an u64 title-id. Web-applet loads the u32 from u32_table[inparam]. Only type4 is usable with this?

Returns an #IFileSystem.

Note: web-applet strings refer to both this cmd and the below "MountContent" as "MountContent".

MountContent

Takes a type-0x19 input buffer, an in32, and an input title-id.

The in32 must be 5 if the NCA type is 0 (control).

The input buffer is the output string path from nsam GetContentNcaPath.

Returns an #IFileSystem.

May return errors when attempting to access NCA-paths for an update-title with a gamecard, when the gamecard isn't inserted. May return error 0x7D402 in some cases with update-titles. Non-val2 in32 values with NCA-type1 are unusable, even for normal titles.

MountBis

Takes a type-0x19 input buffer string and a u32 Bis partitionID(see below). Official user-process code sets instr[0] = 0 normally.

Returns an #IFileSystem.

Only partitionIDs for FAT partitions are usable with this, otherwise error 0x2EE202 is returned. Seems to be about the same as #OpenBisPartition except this mounts the partition filesystem instead of allowing direct access to the partition sectors.

OpenBisPartition

Takes a u32 partition ID, returns 0x2EE202 for partitions which do not exist, 0x320002 for partitions which cannot be opened and a valid #IStorage handle otherwise.

CreateSaveData

Takes a 0x40-byte Save-struct entry, a 0x40-byte SaveCreate-struct entry, and a 0x10-byte userID struct.

Creates regular savedata.

CreateSystemSaveData

Takes a 0x40-byte Save-struct entry and a 0x40-byte SaveCreate-struct entry.

Creates savedata in the SYSTEM NAND partition.

MountSaveData

Takes an input u8 and a 0x40-byte Save-struct entry. Official user-process code is only known to use value 1 for the u8.

Returns an #IFileSystem.

MountSystemSaveData

Takes an input u8 and a 0x40-byte Save-struct entry. Web-applet only uses value0 for the input u8.

Returns an #IFileSystem.

Mounts savedata in the SYSTEM NAND partition.

MountContentStorage

Takes a #ContentStorageId. Invalid values return 0x2EE202.

Returns an #IFileSystem with NCA files. The read data from these files is identical to the data read by Content_Manager_services#ReadEntryRaw.

OpenDeviceOperator

This command returns a session to a port implementing the #IDeviceOperator interface.

OpenSdCardDetectionEventNotifier

This command returns a session to a port implementing the #IEventNotifier interface.

OpenGameCardDetectionEventNotifier

This command returns a session to a port implementing the #IEventNotifier interface.

IStorage

This is the interface for a raw device, usually a block device.

Cmd	Name	Arguments
0	Read	Takes a type-0x46 buffer, an offset and length
1	Write
2	Flush
3	SetSize
4	GetSize	None

IFileSystem

There are two main implementations of this interface:

• RomFS: Filesystem implementation statically linked in the binary. Uses an #IStorage interface as underlying raw device.
• IPC proxy: Used for all non-RomFS filesystems. In this case, actual filesystem implementation is in the FS process.

Cmd	Name
0	CreateFile
1	DeleteFile
2	CreateDirectory
3	DeleteDirectory
4	DeleteDirectoryRecursively
5	RenameFile
6	RenameDirectory
7	GetEntryType
8	OpenFile
9	OpenDirectory
10	Commit
11	GetFreeSpaceSize
12	GetTotalSpaceSize

IDirectory

Cmd	Name
0	Read
1	GetEntryCount

IFile

Cmd	Name
0	Read
1	Write
2	Flush
3	SetSize
4	GetSize

IDeviceOperator

Cmd	Name
0	IsSdCardInserted
1	GetSdCardSpeedMode
2	GetSdCardCid
3
4
5
6
100	GetMmcCid
101	GetMmcSpeedMode
110	EraseMmc
111	GetMmcPartitionSize
112
113
114
200	IsGameCardInserted
201	EraseGameCard
202	GetGameCardHandle
203	#GetGameCardUpdatePartitionInfo
204	FinalizeGameCardDriver
205	GetGameCardAttribute
206	GetGameCardDeviceCertificate
207	GetGameCardAsicInfo
208	GetGameCardIdSet
209	WriteToGameCard
210	SetVerifyWriteEnalbleFlag
211	GetGameCardImageHash
212
213
214
215
216
300	SetSpeedEmulationMode
301	GetSpeedEmulationMode

GetGameCardUpdatePartitionInfo

Returns a titleID and the title-version for it.

• Output u32 with ARMS-gamecard: title-version v131162. This is the title-version for 2.1.0, which is the sysupdate included with this gamecard. Launch-day gamecards return title-version v450.
• Output u64 with ARMS-gamecard: titleID 0100000000000816.

NS appears to only use this with Content_Manager_services#GetTitleIdInfo and Content_Manager_services#GetUpdateTitleList with storageid=nandsys, for checking whether a sysupdate is required.

IEventNotifier

Cmd	Name
0	BindEvent

StorageId

Value	Name
0	None
1	Host
2	GameCard
3	NandSystem
4	NandUser
5	SdCard

ContentStorageId

Value	Name
0	NandSystem
1	NandUser
2	SdCard

BisPartitionID

• 0: Raw NAND sectors access for MMC boot partition 0.
• 10: Raw NAND sectors access for MMC boot partition 1.
• Rest: see here.

Save Struct

Offset	Size	Description
0x0	0x8	0 for SystemSaveData. SaveData: 0 can be used for accessing the savedata associated with the current FS session titleID, otherwise when set this is the titleID associated with the savedata to access.
0x8	0x10	userID for user-specific savedata(saveuser) when set, otherwise when zero this indicates the common savedata(savecommon).
0x18	0x8	u64 saveID. 0 for SaveData.
0x20	0x8	0 for SystemSaveData. 1 for SaveData.
0x28	0x8	0 for SystemSaveData/SaveData.
0x30	0x8	0 for SystemSaveData/SaveData.
0x38	0x8	0 for SystemSaveData/SaveData.

Total size is 0x40-bytes.

SaveCreate Struct

Offset	Size	Description
0x0	0x8	IVFC level4 size?
0x8	0x8	Same as offset 0x0 normally?
0x10	0x8	0x4000 for SystemSaveData. IVFC level4 block-size in bytes?
0x18	0x8	Web-applet only uses 0 here for SystemSaveData.
0x20	0x4	?
0x24	0x1	Same u8 field passed to the mount command?(Web-applet only uses 0 here for SystemSaveData)
0x25	0x1	0 for SystemSaveData.
0x26	0x1A	Not initialized for SystemSaveData.

Total size is 0x40-bytes.