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Merged
jkotas merged 11 commits into from
Jan 22, 2026
Merged

Trim UnixFileSystemTypes to the values .NET runtime cares about. #122964

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136f4f1
Trim UnixFileSystemTypes to the values .NET runtime cares about.
tmds Jan 7, 2026
1da80aa
Replace SystemNative_GetFileSystemType by a method that returns if we…
tmds Jan 7, 2026
da21361
Fix CI build failure.
tmds Jan 7, 2026
9809b7c
Simplify CanLockTheFile.
tmds Jan 7, 2026
d05c899
Handle f_type as an unsigned int.
tmds Jan 7, 2026
2554fe2
Fix CI build errors.
tmds Jan 7, 2026
1b6f3ef
Move the lockOperation and fileAccess check to pal. Add a descriptive…
tmds Jan 12, 2026
6cf1014
Merge remote-tracking branch 'origin/main' into filesystemtypes
tmds Jan 21, 2026
0d52834
Merge branch 'main' into filesystemtypes
tmds Jan 21, 2026
e5b59a2
Merge branch 'main' into filesystemtypes
tmds Jan 21, 2026
e02e1b9
Update wasm callhelpers-pinvoke.cpp for SystemNative_FileSystemSuppor…
tmds Jan 22, 2026
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3 changes: 1 addition & 2 deletions src/libraries/Common/src/Interop/Unix/System.Native/Interop.MountPoints.FormatInfo.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -60,8 +60,7 @@ internal static unsafe Error GetFileSystemTypeNameForMountPoint(string name, out
int result = GetFileSystemTypeNameForMountPoint(name, formatBuffer, MountPointFormatBufferSizeInBytes, &formatType);
if (result == 0)
{
format = formatType == -1 ? Utf8StringMarshaller.ConvertToManaged(formatBuffer)!
: (Enum.GetName(typeof(UnixFileSystemTypes), formatType) ?? "");
format = formatType == -1 ? Utf8StringMarshaller.ConvertToManaged(formatBuffer)! : "";
return Error.SUCCESS;
}
else
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132 changes: 3 additions & 129 deletions src/libraries/Common/src/Interop/Unix/System.Native/Interop.UnixFileSystemTypes.cs
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Expand Up @@ -11,143 +11,17 @@ internal static partial class Interop
internal static partial class Sys
{
/// <summary>
/// FileSystem magic numbers used to turn numbers into a DriveInfo.DriveFormat string representation.
/// FileSystem types used for special handling.
/// </summary>
/// <remarks>
/// These value names MUST be kept in sync with those in GetDriveType (moved to Interop.MountPoints.FormatInfo.cs),
/// where this enum must be a subset of the GetDriveType list, with the enum values here exactly matching a string there.
/// If possible, use names that match the Linux file system type strings.
/// Don't add multiple names for the same value.
/// As values, we use Linux magic numbers. These values are Linux specific. Mapping for other platforms happens in PAL.
/// </remarks>
internal enum UnixFileSystemTypes : uint
{
adfs = 0xADF5,
affs = 0xADFF,
afs = 0x5346414F,
anoninode = 0x09041934,
apfs = 0x1A,
aufs = 0x61756673,
autofs = 0x0187,
autofs4 = 0x6D4A556D,
befs = 0x42465331,
bdev = 0x62646576,
bfs = 0x1BADFACE,
bpf_fs = 0xCAFE4A11,
binfmt_misc = 0x42494E4D,
bootfs = 0xA56D3FF9,
btrfs = 0x9123683E,
ceph = 0x00C36400,
cgroup = 0x0027E0EB,
cgroup2 = 0x63677270,
cifs = 0xFF534D42,
coda = 0x73757245,
coherent = 0x012FF7B7,
configfs = 0x62656570,
// cpuset = 0x01021994, // same as tmpfs
cramfs = 0x28CD3D45,
// ctfs = 0x01021994, // same as tmpfs
debugfs = 0x64626720,
dev = 0x1373,
// devfs = 0x1373, // same as dev
devpts = 0x1CD1,
ecryptfs = 0xF15F,
efs = 0x00414A53,
exofs = 0x5DF5,
ext = 0x137D,
ext2_old = 0xEF51,
ext2 = 0xEF53,
// ext3 = 0xEF53, // same as ext2
// ext4 = 0xEF53, // same as ext2
f2fs = 0xF2F52010,
fat = 0x4006,
fd = 0xF00D1E,
fhgfs = 0x19830326,
fuse = 0x65735546,
// fuseblk = 0x65735546, // same as fuse
fusectl = 0x65735543,
futexfs = 0x0BAD1DEA,
// gfsgfs2 = 0x1161970, // same as gfs2
gfs2 = 0x01161970,
gpfs = 0x47504653,
hfs = 0x4244,
hfsplus = 0x482B,
hpfs = 0xF995E849,
hugetlbfs = 0x958458F6,
inodefs = 0x11307854,
inotifyfs = 0x2BAD1DEA,
isofs = 0x9660,
// isofs = 0x4004, // R_WIN
// isofs = 0x4000, // WIN
jffs = 0x07C0,
jffs2 = 0x72B6,
jfs = 0x3153464A,
kafs = 0x6B414653,
// lofs = 0xEF53, same as ext2
logfs = 0xC97E8168,
lustre = 0x0BD00BD0,
minix_old = 0x137F, /* orig. minix */
minix = 0x138F, /* 30 char minix */
minix2 = 0x2468, /* minix V2 */
minix2v2 = 0x2478, /* MINIX V2, 30 char names */
minix3 = 0x4D5A,
// mntfs = 0x01021994, // same as tmpfs
mqueue = 0x19800202,
msdos = 0x4D44,
nfs = 0x6969,
nfsd = 0x6E667364,
nilfs = 0x3434,
novell = 0x564C,
ntfs = 0x5346544E,
// objfs = 0x01021994, // same as tmpfs
ocfs2 = 0x7461636F,
openprom = 0x9FA1,
omfs = 0xC2993D87,
overlay = 0x794C7630,
overlayfs = 0x794C764F,
panfs = 0xAAD7AAEA,
pipefs = 0x50495045,
proc = 0x9FA0,
pstore = 0x6165676C,
qnx4 = 0x002F,
qnx6 = 0x68191122,
ramfs = 0x858458F6,
reiserfs = 0x52654973,
romfs = 0x7275,
rootfs = 0x53464846,
rpc_pipefs = 0x67596969,
// samba = 0x517B, // same as smb
sdcardfs = 0x5DCA2DF5,
securityfs = 0x73636673,
selinuxfs = 0xF97CFF8C,
// sffs = 0x786F4256, // same as vboxfs
// sharefs = 0x01021994, // same as tmpfs
cifs = 0xFF534D42,
smb = 0x517B,
smb2 = 0xFE534D42,
sockfs = 0x534F434B,
squashfs = 0x73717368,
sysfs = 0x62656572,
sysv2 = 0x012FF7B6,
sysv4 = 0x012FF7B5,
tmpfs = 0x01021994,
tracefs = 0x74726163,
ubifs = 0x24051905,
udf = 0x15013346,
ufs = 0x00011954,
ufscigam = 0x54190100, // ufs byteswapped
ufs2 = 0x19540119,
usbdevice = 0x9FA2,
v9fs = 0x01021997,
// vagrant = 0x786F4256, // same as vboxfs
vboxfs = 0x786F4256,
vmhgfs = 0xBACBACBC,
vxfs = 0xA501FCF5,
vzfs = 0x565A4653,
xenfs = 0xABBA1974,
xenix = 0x012FF7B4,
xfs = 0x58465342,
xia = 0x012FD16D,
// udev = 0x01021994, // same as tmpfs
zfs = 0x2FC12FC1,
}

[LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetFileSystemType")]
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128 changes: 4 additions & 124 deletions src/native/libs/System.Native/pal_io.c
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Expand Up @@ -1561,137 +1561,17 @@ static int16_t ConvertLockType(int16_t managedLockType)
}

#if !HAVE_NON_LEGACY_STATFS || defined(TARGET_APPLE) || defined(TARGET_FREEBSD)
// Maps OS file system names to values from the managed UnixFileSystemTypes enum.
// UnixFileSystemTypes only includes values .NET wants to handle specifically.
static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
{
uint32_t result = 0;

if (strcmp(fileSystemName, "adfs") == 0) result = 0xADF5;
else if (strcmp(fileSystemName, "affs") == 0) result = 0xADFF;
else if (strcmp(fileSystemName, "afs") == 0) result = 0x5346414F;
else if (strcmp(fileSystemName, "anoninode") == 0) result = 0x09041934;
else if (strcmp(fileSystemName, "apfs") == 0) result = 0x1A;
else if (strcmp(fileSystemName, "aufs") == 0) result = 0x61756673;
else if (strcmp(fileSystemName, "autofs") == 0) result = 0x0187;
else if (strcmp(fileSystemName, "autofs4") == 0) result = 0x6D4A556D;
else if (strcmp(fileSystemName, "befs") == 0) result = 0x42465331;
else if (strcmp(fileSystemName, "bdevfs") == 0) result = 0x62646576;
else if (strcmp(fileSystemName, "bfs") == 0) result = 0x1BADFACE;
else if (strcmp(fileSystemName, "bpf_fs") == 0) result = 0xCAFE4A11;
else if (strcmp(fileSystemName, "binfmt_misc") == 0) result = 0x42494E4D;
else if (strcmp(fileSystemName, "bootfs") == 0) result = 0xA56D3FF9;
else if (strcmp(fileSystemName, "btrfs") == 0) result = 0x9123683E;
else if (strcmp(fileSystemName, "ceph") == 0) result = 0x00C36400;
else if (strcmp(fileSystemName, "cgroupfs") == 0) result = 0x0027E0EB;
else if (strcmp(fileSystemName, "cgroup2fs") == 0) result = 0x63677270;
if (strcmp(fileSystemName, "nfs") == 0) result = 0x6969;
else if (strcmp(fileSystemName, "cifs") == 0) result = 0xFF534D42;
else if (strcmp(fileSystemName, "coda") == 0) result = 0x73757245;
else if (strcmp(fileSystemName, "coherent") == 0) result = 0x012FF7B7;
else if (strcmp(fileSystemName, "configfs") == 0) result = 0x62656570;
else if (strcmp(fileSystemName, "cpuset") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "cramfs") == 0) result = 0x28CD3D45;
else if (strcmp(fileSystemName, "ctfs") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "debugfs") == 0) result = 0x64626720;
else if (strcmp(fileSystemName, "dev") == 0) result = 0x1373;
else if (strcmp(fileSystemName, "devfs") == 0) result = 0x1373;
else if (strcmp(fileSystemName, "devpts") == 0) result = 0x1CD1;
else if (strcmp(fileSystemName, "ecryptfs") == 0) result = 0xF15F;
else if (strcmp(fileSystemName, "efs") == 0) result = 0x00414A53;
else if (strcmp(fileSystemName, "exofs") == 0) result = 0x5DF5;
else if (strcmp(fileSystemName, "ext") == 0) result = 0x137D;
else if (strcmp(fileSystemName, "ext2_old") == 0) result = 0xEF51;
else if (strcmp(fileSystemName, "ext2") == 0) result = 0xEF53;
else if (strcmp(fileSystemName, "ext3") == 0) result = 0xEF53;
else if (strcmp(fileSystemName, "ext4") == 0) result = 0xEF53;
else if (strcmp(fileSystemName, "f2fs") == 0) result = 0xF2F52010;
else if (strcmp(fileSystemName, "fat") == 0) result = 0x4006;
else if (strcmp(fileSystemName, "fd") == 0) result = 0xF00D1E;
else if (strcmp(fileSystemName, "fhgfs") == 0) result = 0x19830326;
else if (strcmp(fileSystemName, "fuse") == 0) result = 0x65735546;
else if (strcmp(fileSystemName, "fuseblk") == 0) result = 0x65735546;
else if (strcmp(fileSystemName, "fusectl") == 0) result = 0x65735543;
else if (strcmp(fileSystemName, "futexfs") == 0) result = 0x0BAD1DEA;
else if (strcmp(fileSystemName, "gfsgfs2") == 0) result = 0x1161970;
else if (strcmp(fileSystemName, "gfs2") == 0) result = 0x01161970;
else if (strcmp(fileSystemName, "gpfs") == 0) result = 0x47504653;
else if (strcmp(fileSystemName, "hfs") == 0) result = 0x4244;
else if (strcmp(fileSystemName, "hfsplus") == 0) result = 0x482B;
else if (strcmp(fileSystemName, "hpfs") == 0) result = 0xF995E849;
else if (strcmp(fileSystemName, "hugetlbfs") == 0) result = 0x958458F6;
else if (strcmp(fileSystemName, "inodefs") == 0) result = 0x11307854;
else if (strcmp(fileSystemName, "inotifyfs") == 0) result = 0x2BAD1DEA;
else if (strcmp(fileSystemName, "isofs") == 0) result = 0x9660;
else if (strcmp(fileSystemName, "jffs") == 0) result = 0x07C0;
else if (strcmp(fileSystemName, "jffs2") == 0) result = 0x72B6;
else if (strcmp(fileSystemName, "jfs") == 0) result = 0x3153464A;
else if (strcmp(fileSystemName, "kafs") == 0) result = 0x6B414653;
else if (strcmp(fileSystemName, "lofs") == 0) result = 0xEF53;
else if (strcmp(fileSystemName, "logfs") == 0) result = 0xC97E8168;
else if (strcmp(fileSystemName, "lustre") == 0) result = 0x0BD00BD0;
else if (strcmp(fileSystemName, "minix_old") == 0) result = 0x137F;
else if (strcmp(fileSystemName, "minix") == 0) result = 0x138F;
else if (strcmp(fileSystemName, "minix2") == 0) result = 0x2468;
else if (strcmp(fileSystemName, "minix2v2") == 0) result = 0x2478;
else if (strcmp(fileSystemName, "minix3") == 0) result = 0x4D5A;
else if (strcmp(fileSystemName, "mntfs") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "mqueue") == 0) result = 0x19800202;
else if (strcmp(fileSystemName, "msdos") == 0) result = 0x4D44;
else if (strcmp(fileSystemName, "nfs") == 0) result = 0x6969;
else if (strcmp(fileSystemName, "nfsd") == 0) result = 0x6E667364;
else if (strcmp(fileSystemName, "nilfs") == 0) result = 0x3434;
else if (strcmp(fileSystemName, "novell") == 0) result = 0x564C;
else if (strcmp(fileSystemName, "ntfs") == 0) result = 0x5346544E;
else if (strcmp(fileSystemName, "objfs") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "ocfs2") == 0) result = 0x7461636F;
else if (strcmp(fileSystemName, "openprom") == 0) result = 0x9FA1;
else if (strcmp(fileSystemName, "omfs") == 0) result = 0xC2993D87;
else if (strcmp(fileSystemName, "overlay") == 0) result = 0x794C7630;
else if (strcmp(fileSystemName, "overlayfs") == 0) result = 0x794C764F;
else if (strcmp(fileSystemName, "panfs") == 0) result = 0xAAD7AAEA;
else if (strcmp(fileSystemName, "pipefs") == 0) result = 0x50495045;
else if (strcmp(fileSystemName, "proc") == 0) result = 0x9FA0;
else if (strcmp(fileSystemName, "pstorefs") == 0) result = 0x6165676C;
else if (strcmp(fileSystemName, "qnx4") == 0) result = 0x002F;
else if (strcmp(fileSystemName, "qnx6") == 0) result = 0x68191122;
else if (strcmp(fileSystemName, "ramfs") == 0) result = 0x858458F6;
else if (strcmp(fileSystemName, "reiserfs") == 0) result = 0x52654973;
else if (strcmp(fileSystemName, "romfs") == 0) result = 0x7275;
else if (strcmp(fileSystemName, "rootfs") == 0) result = 0x53464846;
else if (strcmp(fileSystemName, "rpc_pipefs") == 0) result = 0x67596969;
else if (strcmp(fileSystemName, "samba") == 0) result = 0x517B;
else if (strcmp(fileSystemName, "sdcardfs") == 0) result = 0x5DCA2DF5;
else if (strcmp(fileSystemName, "securityfs") == 0) result = 0x73636673;
else if (strcmp(fileSystemName, "selinux") == 0) result = 0xF97CFF8C;
else if (strcmp(fileSystemName, "sffs") == 0) result = 0x786F4256;
else if (strcmp(fileSystemName, "sharefs") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "smb") == 0) result = 0x517B;
else if (strcmp(fileSystemName, "smb2") == 0) result = 0xFE534D42;
else if (strcmp(fileSystemName, "sockfs") == 0) result = 0x534F434B;
else if (strcmp(fileSystemName, "squashfs") == 0) result = 0x73717368;
else if (strcmp(fileSystemName, "sysfs") == 0) result = 0x62656572;
else if (strcmp(fileSystemName, "sysv2") == 0) result = 0x012FF7B6;
else if (strcmp(fileSystemName, "sysv4") == 0) result = 0x012FF7B5;
else if (strcmp(fileSystemName, "tmpfs") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "tracefs") == 0) result = 0x74726163;
else if (strcmp(fileSystemName, "ubifs") == 0) result = 0x24051905;
else if (strcmp(fileSystemName, "udf") == 0) result = 0x15013346;
else if (strcmp(fileSystemName, "ufs") == 0) result = 0x00011954;
else if (strcmp(fileSystemName, "ufscigam") == 0) result = 0x54190100;
else if (strcmp(fileSystemName, "ufs2") == 0) result = 0x19540119;
else if (strcmp(fileSystemName, "usbdevice") == 0) result = 0x9FA2;
else if (strcmp(fileSystemName, "v9fs") == 0) result = 0x01021997;
else if (strcmp(fileSystemName, "vagrant") == 0) result = 0x786F4256;
else if (strcmp(fileSystemName, "vboxfs") == 0) result = 0x786F4256;
else if (strcmp(fileSystemName, "vmhgfs") == 0) result = 0xBACBACBC;
else if (strcmp(fileSystemName, "vxfs") == 0) result = 0xA501FCF5;
else if (strcmp(fileSystemName, "vzfs") == 0) result = 0x565A4653;
else if (strcmp(fileSystemName, "xenfs") == 0) result = 0xABBA1974;
else if (strcmp(fileSystemName, "xenix") == 0) result = 0x012FF7B4;
else if (strcmp(fileSystemName, "xfs") == 0) result = 0x58465342;
else if (strcmp(fileSystemName, "xia") == 0) result = 0x012FD16D;
else if (strcmp(fileSystemName, "udev") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "zfs") == 0) result = 0x2FC12FC1;

assert(result != 0);

return result;
}
#endif
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