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[EXT2]
Import commits by Kaho Ng <ngkaho1234@gmail.com> from upstream: - b7657e5 Ext3Fsd: Introduce VCB_RO_COMPAT_READ_ONLY flag for struct VCB - e7c1142 Ext3Fsd: EXT4_FEATURE_INCOMPAT_64BIT is not supported - 785943f Ext3Fsd: fix issue #6 Refuse mounting filesystems with incompatible flags. This avoids corrupting 64bits filesystems. Patch by Lubomir Rintel CORE-13589 svn path=/trunk/; revision=75422
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@ -789,6 +789,7 @@ typedef struct _EXT2_VCB {
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#define VCB_DEVICE_REMOVED 0x00008000
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#define VCB_JOURNAL_RECOVER 0x00080000
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#define VCB_ARRIVAL_NOTIFIED 0x00800000
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#define VCB_RO_COMPAT_READ_ONLY 0x01000000
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#define VCB_READ_ONLY 0x08000000
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#define VCB_WRITE_PROTECTED 0x10000000
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#define VCB_FLOPPY_DISK 0x20000000
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@ -800,6 +801,7 @@ typedef struct _EXT2_VCB {
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#define IsMounted(Vcb) (IsFlagOn((Vcb)->Flags, VCB_MOUNTED))
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#define IsDispending(Vcb) (IsFlagOn((Vcb)->Flags, VCB_DISMOUNT_PENDING))
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#define IsVcbReadOnly(Vcb) (IsFlagOn((Vcb)->Flags, VCB_READ_ONLY) || \
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IsFlagOn((Vcb)->Flags, VCB_RO_COMPAT_READ_ONLY) || \
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IsFlagOn((Vcb)->Flags, VCB_WRITE_PROTECTED))
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@ -720,7 +720,6 @@ static inline int ext3_valid_inum(struct super_block *sb, unsigned long ino)
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EXT4_FEATURE_INCOMPAT_RECOVER| \
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EXT4_FEATURE_INCOMPAT_META_BG| \
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EXT4_FEATURE_INCOMPAT_EXTENTS| \
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EXT4_FEATURE_INCOMPAT_64BIT| \
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EXT4_FEATURE_INCOMPAT_FLEX_BG)
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#define EXT4_FEATURE_RO_COMPAT_SUPP ( \
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EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
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@ -2318,17 +2318,22 @@ Ext2InitializeVcb( IN PEXT2_IRP_CONTEXT IrpContext,
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_SEH2_LEAVE;
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}
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/* checking in/compat features */
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if (IsFlagOn(sb->s_feature_compat, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
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Vcb->IsExt3fs = TRUE;
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}
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/* don't mount any volumes with external journal devices */
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if (IsFlagOn(sb->s_feature_incompat, EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
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/* Reject mounting volume if we encounter unsupported incompat features */
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if (FlagOn(sb->s_feature_incompat, ~EXT4_FEATURE_INCOMPAT_SUPP)) {
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Status = STATUS_UNRECOGNIZED_VOLUME;
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_SEH2_LEAVE;
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}
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/* Mount the volume RO if we encounter unsupported ro_compat features */
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if (FlagOn(sb->s_feature_ro_compat, ~EXT4_FEATURE_RO_COMPAT_SUPP)) {
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SetLongFlag(Vcb->Flags, VCB_RO_COMPAT_READ_ONLY);
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}
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/* Recognize the filesystem as Ext3fs if it supports journalling */
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if (IsFlagOn(sb->s_feature_compat, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
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Vcb->IsExt3fs = TRUE;
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}
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/* check block size */
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Vcb->BlockSize = (EXT2_MIN_BLOCK_SIZE << sb->s_log_block_size);
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/* we cannot handle volume with block size bigger than 64k */
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@ -9,7 +9,7 @@ reactos/sdk/lib/fslib/btrfslib # Synced to 0.8
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The following FSD are shared with: http://www.ext2fsd.com/
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reactos/drivers/filesystems/ext2 # Synced to 0.68
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reactos/drivers/filesystems/ext2 # Synced to 0.68, with b7657e5, e7c1142, 785943f
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The following FSD are shared with: http://www.acc.umu.se/~bosse/
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