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Add missing filesystem magic numbers to UnixFileSystemTypes enum #122829

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0dd660e
Initial plan
Copilot Jan 3, 2026
063d68f
Add exfat filesystem magic number to UnixFileSystemTypes enum
Copilot Jan 3, 2026
0494282
Add missing filesystem magic numbers to UnixFileSystemTypes enum
Copilot Jan 3, 2026
66703f0
Add remaining filesystem magic numbers from Linux kernel magic.h
Copilot Jan 3, 2026
76316fa
Sync pal_io.c MapFileSystemNameToEnum with UnixFileSystemTypes enum
Copilot Jan 4, 2026
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6 changes: 6 additions & 0 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 @@ -114,6 +114,7 @@ private static DriveType GetDriveType(string fileSystemName)
case "anon-inode FS":
case "apfs":
case "balloon-kvm-fs":
case "bcachefs":
case "bdevfs":
case "befs":
case "bfs":
Expand All @@ -126,6 +127,7 @@ private static DriveType GetDriveType(string fileSystemName)
case "drvfs":
case "efivarfs":
case "efs":
case "erofs":
case "exfat":
case "exofs":
case "ext":
Expand Down Expand Up @@ -207,6 +209,7 @@ private static DriveType GetDriveType(string fileSystemName)
case "xmount":
case "zfs":
case "zfs-fuse":
case "zonefs":
case "zsmallocfs":
return DriveType.Fixed;

Expand Down Expand Up @@ -274,6 +277,7 @@ private static DriveType GetDriveType(string fileSystemName)
case "aptfs":
case "avfs":
case "bdev":
case "binderfs":
case "bpf":
case "binfmt_misc":
case "cgroup":
Expand Down Expand Up @@ -308,12 +312,14 @@ private static DriveType GetDriveType(string fileSystemName)
case "objfs":
case "openprom":
case "openpromfs":
case "pidfs":
case "pipefs":
case "plptools":
case "proc":
case "pstore":
case "pytagsfs":
case "ramfs":
case "rdtgroup":
case "rofs":
case "romfs":
case "rootfs":
Expand Down
17 changes: 17 additions & 0 deletions src/libraries/Common/src/Interop/Unix/System.Native/Interop.UnixFileSystemTypes.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ internal static partial class Sys
/// </remarks>
internal enum UnixFileSystemTypes : uint
{
aafs = 0x5A3C69F0,
adfs = 0xADF5,
affs = 0xADFF,
afs = 0x5346414F,
Expand All @@ -29,13 +30,16 @@ internal enum UnixFileSystemTypes : uint
aufs = 0x61756673,
autofs = 0x0187,
autofs4 = 0x6D4A556D,
bcachefs = 0xCA451A4E,
befs = 0x42465331,
bdev = 0x62646576,
bfs = 0x1BADFACE,
bpf_fs = 0xCAFE4A11,
binderfs = 0x6C6F6F70,
binfmt_misc = 0x42494E4D,
bootfs = 0xA56D3FF9,
btrfs = 0x9123683E,
btrfs_test = 0x73727279,
ceph = 0x00C36400,
cgroup = 0x0027E0EB,
cgroup2 = 0x63677270,
Expand All @@ -47,11 +51,15 @@ internal enum UnixFileSystemTypes : uint
cramfs = 0x28CD3D45,
// ctfs = 0x01021994, // same as tmpfs
debugfs = 0x64626720,
daxfs = 0x64646178,
dev = 0x1373,
// devfs = 0x1373, // same as dev
devpts = 0x1CD1,
ecryptfs = 0xF15F,
efivarfs = 0xDE5E81E4,
efs = 0x00414A53,
erofs = 0xE0F5E1E2,
exfat = 0x2011BAB0,
exofs = 0x5DF5,
ext = 0x137D,
ext2_old = 0xEF51,
Expand All @@ -71,8 +79,10 @@ internal enum UnixFileSystemTypes : uint
gpfs = 0x47504653,
hfs = 0x4244,
hfsplus = 0x482B,
hostfs = 0x00C0FFEE,
hpfs = 0xF995E849,
hugetlbfs = 0x958458F6,
ibrix = 0x013111A8,
inodefs = 0x11307854,
inotifyfs = 0x2BAD1DEA,
isofs = 0x9660,
Expand All @@ -97,6 +107,7 @@ internal enum UnixFileSystemTypes : uint
nfsd = 0x6E667364,
nilfs = 0x3434,
novell = 0x564C,
nsfs = 0x6E736673,
ntfs = 0x5346544E,
// objfs = 0x01021994, // same as tmpfs
ocfs2 = 0x7461636F,
Expand All @@ -105,12 +116,15 @@ internal enum UnixFileSystemTypes : uint
overlay = 0x794C7630,
overlayfs = 0x794C764F,
panfs = 0xAAD7AAEA,
pidfs = 0x50494446,
pipefs = 0x50495045,
prl_fs = 0x7C7C6673,
proc = 0x9FA0,
pstore = 0x6165676C,
qnx4 = 0x002F,
qnx6 = 0x68191122,
ramfs = 0x858458F6,
rdtgroup = 0x07655821,
reiserfs = 0x52654973,
romfs = 0x7275,
rootfs = 0x53464846,
Expand All @@ -123,6 +137,8 @@ internal enum UnixFileSystemTypes : uint
// sharefs = 0x01021994, // same as tmpfs
smb = 0x517B,
smb2 = 0xFE534D42,
smackfs = 0x43415D53,
snfs = 0xBEEFDEAD,
sockfs = 0x534F434B,
squashfs = 0x73717368,
sysfs = 0x62656572,
Expand All @@ -148,6 +164,7 @@ internal enum UnixFileSystemTypes : uint
xia = 0x012FD16D,
// udev = 0x01021994, // same as tmpfs
zfs = 0x2FC12FC1,
zonefs = 0x5A4F4653,
}

[LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_GetFileSystemType")]
Expand Down
19 changes: 18 additions & 1 deletion src/native/libs/System.Native/pal_io.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1565,21 +1565,25 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
{
uint32_t result = 0;

if (strcmp(fileSystemName, "adfs") == 0) result = 0xADF5;
if (strcmp(fileSystemName, "aafs") == 0) result = 0x5A3C69F0;
else 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, "bcachefs") == 0) result = 0xCA451A4E;
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, "binderfs") == 0) result = 0x6C6F6F70;
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, "btrfs_test") == 0) result = 0x73727279;
else if (strcmp(fileSystemName, "ceph") == 0) result = 0x00C36400;
else if (strcmp(fileSystemName, "cgroupfs") == 0) result = 0x0027E0EB;
else if (strcmp(fileSystemName, "cgroup2fs") == 0) result = 0x63677270;
Expand All @@ -1591,11 +1595,15 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
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, "daxfs") == 0) result = 0x64646178;
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, "efivarfs") == 0) result = 0xDE5E81E4;
else if (strcmp(fileSystemName, "efs") == 0) result = 0x00414A53;
else if (strcmp(fileSystemName, "erofs") == 0) result = 0xE0F5E1E2;
else if (strcmp(fileSystemName, "exfat") == 0) result = 0x2011BAB0;
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;
Expand All @@ -1615,8 +1623,10 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
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, "hostfs") == 0) result = 0x00C0FFEE;
else if (strcmp(fileSystemName, "hpfs") == 0) result = 0xF995E849;
else if (strcmp(fileSystemName, "hugetlbfs") == 0) result = 0x958458F6;
else if (strcmp(fileSystemName, "ibrix") == 0) result = 0x013111A8;
else if (strcmp(fileSystemName, "inodefs") == 0) result = 0x11307854;
else if (strcmp(fileSystemName, "inotifyfs") == 0) result = 0x2BAD1DEA;
else if (strcmp(fileSystemName, "isofs") == 0) result = 0x9660;
Expand All @@ -1639,6 +1649,7 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
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, "nsfs") == 0) result = 0x6E736673;
else if (strcmp(fileSystemName, "ntfs") == 0) result = 0x5346544E;
else if (strcmp(fileSystemName, "objfs") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "ocfs2") == 0) result = 0x7461636F;
Expand All @@ -1647,12 +1658,15 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
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, "pidfs") == 0) result = 0x50494446;
else if (strcmp(fileSystemName, "pipefs") == 0) result = 0x50495045;
else if (strcmp(fileSystemName, "prl_fs") == 0) result = 0x7C7C6673;
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, "rdtgroup") == 0) result = 0x07655821;
else if (strcmp(fileSystemName, "reiserfs") == 0) result = 0x52654973;
else if (strcmp(fileSystemName, "romfs") == 0) result = 0x7275;
else if (strcmp(fileSystemName, "rootfs") == 0) result = 0x53464846;
Expand All @@ -1665,6 +1679,8 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
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, "smackfs") == 0) result = 0x43415D53;
else if (strcmp(fileSystemName, "snfs") == 0) result = 0xBEEFDEAD;
else if (strcmp(fileSystemName, "sockfs") == 0) result = 0x534F434B;
else if (strcmp(fileSystemName, "squashfs") == 0) result = 0x73717368;
else if (strcmp(fileSystemName, "sysfs") == 0) result = 0x62656572;
Expand All @@ -1690,6 +1706,7 @@ static uint32_t MapFileSystemNameToEnum(const char* fileSystemName)
else if (strcmp(fileSystemName, "xia") == 0) result = 0x012FD16D;
else if (strcmp(fileSystemName, "udev") == 0) result = 0x01021994;
else if (strcmp(fileSystemName, "zfs") == 0) result = 0x2FC12FC1;
else if (strcmp(fileSystemName, "zonefs") == 0) result = 0x5A4F4653;

assert(result != 0);
return result;
Expand Down
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