From: Pierre Schweitzer Date: Fri, 27 May 2016 12:18:47 +0000 (+0000) Subject: [FS_REC] X-Git-Tag: ReactOS-0.4.2~529 X-Git-Url: https://git.reactos.org/?p=reactos.git;a=commitdiff_plain;h=189f1859eed2c5746051c3aec85d79458855e8d3 [FS_REC] Add support for FFS volumes. Patch by Peter Hater. This is done for FFS support! Enjoy :-) CORE-11040 #resolve svn path=/trunk/; revision=71429 --- diff --git a/reactos/drivers/filesystems/fs_rec/CMakeLists.txt b/reactos/drivers/filesystems/fs_rec/CMakeLists.txt index 4e2bfa51db5..81394b599ce 100644 --- a/reactos/drivers/filesystems/fs_rec/CMakeLists.txt +++ b/reactos/drivers/filesystems/fs_rec/CMakeLists.txt @@ -4,6 +4,7 @@ list(APPEND SOURCE cdfs.c ext2.c fat.c + ffs.c fs_rec.c ntfs.c reiserfs.c diff --git a/reactos/drivers/filesystems/fs_rec/ffs.c b/reactos/drivers/filesystems/fs_rec/ffs.c new file mode 100644 index 00000000000..c3b53f8002d --- /dev/null +++ b/reactos/drivers/filesystems/fs_rec/ffs.c @@ -0,0 +1,220 @@ +/* + * COPYRIGHT: See COPYING in the top level directory + * PROJECT: ReactOS File System Recognizer + * FILE: drivers/filesystems/fs_rec/ffs.c + * PURPOSE: FFS Recognizer + * PROGRAMMER: Peter Hater + * Pierre Schweitzer (pierre@reactos.org) + */ + +/* INCLUDES *****************************************************************/ + +#include "fs_rec.h" +#include "ffs.h" + +#define NDEBUG +#include + +/* FUNCTIONS ****************************************************************/ + +BOOLEAN +NTAPI +FsRecIsFfsDiskLabel(IN PFFSD_DISKLABEL dl) +{ + return (dl->d_magic == DISKMAGIC); +} + +BOOLEAN +NTAPI +FsRecIsFfs1Volume(IN PFFSD_SUPER_BLOCK sb) +{ + return (sb->fs_magic == FS_UFS1_MAGIC); +} + +BOOLEAN +NTAPI +FsRecIsFfs2Volume(IN PFFSD_SUPER_BLOCK sb) +{ + return (sb->fs_magic == FS_UFS2_MAGIC); +} + +NTSTATUS +NTAPI +FsRecFfsFsControl(IN PDEVICE_OBJECT DeviceObject, + IN PIRP Irp) +{ + PIO_STACK_LOCATION Stack; + NTSTATUS Status; + PDEVICE_OBJECT MountDevice; + PFFSD_SUPER_BLOCK Spb = NULL; + PFFSD_DISKLABEL DiskLabel = NULL; + ULONGLONG FSOffset = 0; + int i; + ULONG SectorSize; + LARGE_INTEGER Offset; + BOOLEAN DeviceError = FALSE; + PAGED_CODE(); + + /* Get the I/O Stack and check the function type */ + Stack = IoGetCurrentIrpStackLocation(Irp); + switch (Stack->MinorFunction) + { + case IRP_MN_MOUNT_VOLUME: + + /* Assume failure */ + Status = STATUS_UNRECOGNIZED_VOLUME; + + /* Get the device object and request the sector size */ + MountDevice = Stack->Parameters.MountVolume.DeviceObject; + if (FsRecGetDeviceSectorSize(MountDevice, &SectorSize)) + { + /* Try to read the disklabel */ + Offset.QuadPart = LABELSECTOR*SectorSize; + if (FsRecReadBlock(MountDevice, + &Offset, + SectorSize, + SectorSize, + (PVOID)&DiskLabel, + &DeviceError)) + { + /* Check if it's an actual FFS disk label */ + if (FsRecIsFfsDiskLabel(DiskLabel)) + { + /* It is! */ + for (i = 0; i < MAXPARTITIONS; i++) + { + if (DiskLabel->d_partitions[i].p_fstype == FS_BSDFFS) + { + /* Important */ + FSOffset = DiskLabel->d_partitions[i].p_offset; + FSOffset = FSOffset * SectorSize; + /* Try to read the superblock */ + Offset.QuadPart = FSOffset+SBLOCK_UFS1; + if (FsRecReadBlock(MountDevice, + &Offset, + SBLOCKSIZE, + SectorSize, + (PVOID)&Spb, + &DeviceError)) + { + /* Check if it's an actual FFS volume */ + if (FsRecIsFfs1Volume(Spb)) + { + /* It is! */ + Status = STATUS_FS_DRIVER_REQUIRED; + } + else + { + /* Free the boot sector if we have one */ + ExFreePool(Spb); + Spb = NULL; + + Offset.QuadPart = FSOffset+SBLOCK_UFS2; + if (FsRecReadBlock(MountDevice, + &Offset, + SBLOCKSIZE, + SectorSize, + (PVOID)&Spb, + &DeviceError)) + { + /* Check if it's an actual FFS volume */ + if (FsRecIsFfs2Volume(Spb)) + { + /* It is! */ + Status = STATUS_FS_DRIVER_REQUIRED; + } + } + } + } + + /* Free the boot sector if we have one */ + ExFreePool(Spb); + Spb = NULL; + } + } + } + else + { + /* Try to read the superblock */ + Offset.QuadPart = FSOffset+SBLOCK_UFS1; + if (FsRecReadBlock(MountDevice, + &Offset, + SBLOCKSIZE, + SectorSize, + (PVOID)&Spb, + &DeviceError)) + { + /* Check if it's an actual FFS volume */ + if (FsRecIsFfs1Volume(Spb)) + { + /* It is! */ + Status = STATUS_FS_DRIVER_REQUIRED; + } + else + { + /* Free the boot sector if we have one */ + ExFreePool(Spb); + Spb = NULL; + + Offset.QuadPart = FSOffset+SBLOCK_UFS2; + if (FsRecReadBlock(MountDevice, + &Offset, + SBLOCKSIZE, + SectorSize, + (PVOID)&Spb, + &DeviceError)) + { + /* Check if it's an actual FFS volume */ + if (FsRecIsFfs2Volume(Spb)) + { + /* It is! */ + Status = STATUS_FS_DRIVER_REQUIRED; + } + } + } + } + + /* Free the boot sector if we have one */ + ExFreePool(Spb); + Spb = NULL; + } + } + + /* Free the boot sector if we have one */ + ExFreePool(DiskLabel); + } + else + { + /* We have some sort of failure in the storage stack */ + DeviceError = TRUE; + } + + /* Check if we have an error on the stack */ + if (DeviceError) + { + /* Was this because of a floppy? */ + if (MountDevice->Characteristics & FILE_FLOPPY_DISKETTE) + { + /* Let the FS try anyway */ + Status = STATUS_FS_DRIVER_REQUIRED; + } + } + + break; + + case IRP_MN_LOAD_FILE_SYSTEM: + + /* Load the file system */ + Status = FsRecLoadFileSystem(DeviceObject, + L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\ffs"); + break; + + default: + + /* Invalid request */ + Status = STATUS_INVALID_DEVICE_REQUEST; + } + + /* Return Status */ + return Status; +} diff --git a/reactos/drivers/filesystems/fs_rec/ffs.h b/reactos/drivers/filesystems/fs_rec/ffs.h new file mode 100644 index 00000000000..43271b5a770 --- /dev/null +++ b/reactos/drivers/filesystems/fs_rec/ffs.h @@ -0,0 +1,297 @@ +/* + * COPYRIGHT: See COPYING in the top level directory + * PROJECT: ReactOS File System Recognizer + * FILE: drivers/filesystems/fs_rec/ffs.h + * PURPOSE: FFS Header File + * PROGRAMMER: Peter Hater + * Pierre Schweitzer (pierre@reactos.org) + */ + +#include + +/* + * The path name on which the file system is mounted is maintained + * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in + * the super block for this name. + */ +#define MAXMNTLEN 468 + +/* + * The volume name for this filesystem is maintained in fs_volname. + * MAXVOLLEN defines the length of the buffer allocated. + * This space used to be part of of fs_fsmnt. + */ +#define MAXVOLLEN 32 + +/* + * Unused value currently, FreeBSD compat. + */ +#define FSMAXSNAP 20 + +/* + * There is a 128-byte region in the superblock reserved for in-core + * pointers to summary information. Originally this included an array + * of pointers to blocks of struct csum; now there are just four + * pointers and the remaining space is padded with fs_ocsp[]. + * NOCSPTRS determines the size of this padding. One pointer (fs_csp) + * is taken away to point to a contiguous array of struct csum for + * all cylinder groups; a second (fs_maxcluster) points to an array + * of cluster sizes that is computed as cylinder groups are inspected; + * the third (fs_contigdirs) points to an array that tracks the + * creation of new directories; and the fourth (fs_active) is used + * by snapshots. + */ +#define NOCSPTRS ((128 / sizeof(void *)) - 4) + +/* + * Per cylinder group information; summarized in blocks allocated + * from first cylinder group data blocks. These blocks have to be + * read in from fs_csaddr (size fs_cssize) in addition to the + * super block. + */ +struct csum { + INT32 cs_ndir; /* number of directories */ + INT32 cs_nbfree; /* number of free blocks */ + INT32 cs_nifree; /* number of free inodes */ + INT32 cs_nffree; /* number of free frags */ +}; + +struct csum_total { + INT64 cs_ndir; /* number of directories */ + INT64 cs_nbfree; /* number of free blocks */ + INT64 cs_nifree; /* number of free inodes */ + INT64 cs_nffree; /* number of free frags */ + INT64 cs_spare[4]; /* future expansion */ +}; + +/* + * Super block for an FFS file system in memory. + */ +typedef struct fs { + INT32 fs_firstfield; /* historic file system linked list, */ + INT32 fs_unused_1; /* used for incore super blocks */ + INT32 fs_sblkno; /* addr of super-block in filesys */ + INT32 fs_cblkno; /* offset of cyl-block in filesys */ + INT32 fs_iblkno; /* offset of inode-blocks in filesys */ + INT32 fs_dblkno; /* offset of first data after cg */ + INT32 fs_old_cgoffset; /* cylinder group offset in cylinder */ + INT32 fs_old_cgmask; /* used to calc mod fs_ntrak */ + INT32 fs_old_time; /* last time written */ + INT32 fs_old_size; /* number of blocks in fs */ + INT32 fs_old_dsize; /* number of data blocks in fs */ + INT32 fs_ncg; /* number of cylinder groups */ + INT32 fs_bsize; /* size of basic blocks in fs */ + INT32 fs_fsize; /* size of frag blocks in fs */ + INT32 fs_frag; /* number of frags in a block in fs */ +/* these are configuration parameters */ + INT32 fs_minfree; /* minimum percentage of free blocks */ + INT32 fs_old_rotdelay; /* num of ms for optimal next block */ + INT32 fs_old_rps; /* disk revolutions per second */ +/* these fields can be computed from the others */ + INT32 fs_bmask; /* ``blkoff'' calc of blk offsets */ + INT32 fs_fmask; /* ``fragoff'' calc of frag offsets */ + INT32 fs_bshift; /* ``lblkno'' calc of logical blkno */ + INT32 fs_fshift; /* ``numfrags'' calc number of frags */ +/* these are configuration parameters */ + INT32 fs_maxcontig; /* max number of contiguous blks */ + INT32 fs_maxbpg; /* max number of blks per cyl group */ +/* these fields can be computed from the others */ + INT32 fs_fragshift; /* block to frag shift */ + INT32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ + INT32 fs_sbsize; /* actual size of super block */ + INT32 fs_spare1[2]; /* old fs_csmask */ + /* old fs_csshift */ + INT32 fs_nindir; /* value of NINDIR */ + INT32 fs_inopb; /* value of INOPB */ + INT32 fs_old_nspf; /* value of NSPF */ +/* yet another configuration parameter */ + INT32 fs_optim; /* optimization preference, see below */ +/* these fields are derived from the hardware */ + INT32 fs_old_npsect; /* # sectors/track including spares */ + INT32 fs_old_interleave; /* hardware sector interleave */ + INT32 fs_old_trackskew; /* sector 0 skew, per track */ +/* fs_id takes the space of the unused fs_headswitch and fs_trkseek fields */ + INT32 fs_id[2]; /* unique file system id */ +/* sizes determined by number of cylinder groups and their sizes */ + INT32 fs_old_csaddr; /* blk addr of cyl grp summary area */ + INT32 fs_cssize; /* size of cyl grp summary area */ + INT32 fs_cgsize; /* cylinder group size */ +/* these fields are derived from the hardware */ + INT32 fs_spare2; /* old fs_ntrak */ + INT32 fs_old_nsect; /* sectors per track */ + INT32 fs_old_spc; /* sectors per cylinder */ + INT32 fs_old_ncyl; /* cylinders in file system */ + INT32 fs_old_cpg; /* cylinders per group */ + INT32 fs_ipg; /* inodes per group */ + INT32 fs_fpg; /* blocks per group * fs_frag */ +/* this data must be re-computed after crashes */ + struct csum fs_old_cstotal; /* cylinder summary information */ +/* these fields are cleared at mount time */ + INT8 fs_fmod; /* super block modified flag */ + INT8 fs_clean; /* file system is clean flag */ + INT8 fs_ronly; /* mounted read-only flag */ + UINT8 fs_old_flags; /* see FS_ flags below */ + UCHAR fs_fsmnt[MAXMNTLEN]; /* name mounted on */ + UCHAR fs_volname[MAXVOLLEN]; /* volume name */ + UINT64 fs_swuid; /* system-wide uid */ + INT32 fs_pad; +/* these fields retain the current block allocation info */ + INT32 fs_cgrotor; /* last cg searched (UNUSED) */ + void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ + UINT8 *fs_contigdirs; /* # of contiguously allocated dirs */ + struct csum *fs_csp; /* cg summary info buffer for fs_cs */ + INT32 *fs_maxcluster; /* max cluster in each cyl group */ + INT32 *fs_active; /* used by snapshots to track fs */ + INT32 fs_old_cpc; /* cyl per cycle in postbl */ +/* this area is otherwise allocated unless fs_old_flags & FS_FLAGS_UPDATED */ + INT32 fs_maxbsize; /* maximum blocking factor permitted */ + INT64 fs_sparecon64[17]; /* old rotation block list head */ + INT64 fs_sblockloc; /* byte offset of standard superblock */ + struct csum_total fs_cstotal; /* cylinder summary information */ + INT64 fs_time; /* last time written */ + INT64 fs_size; /* number of blocks in fs */ + INT64 fs_dsize; /* number of data blocks in fs */ + INT64 fs_csaddr; /* blk addr of cyl grp summary area */ + INT64 fs_pendingblocks; /* blocks in process of being freed */ + INT32 fs_pendinginodes; /* inodes in process of being freed */ + INT32 fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ +/* back to stuff that has been around a while */ + INT32 fs_avgfilesize; /* expected average file size */ + INT32 fs_avgfpdir; /* expected # of files per directory */ + INT32 fs_save_cgsize; /* save real cg size to use fs_bsize */ + INT32 fs_sparecon32[26]; /* reserved for future constants */ + INT32 fs_flags; /* see FS_ flags below */ +/* back to stuff that has been around a while (again) */ + INT32 fs_contigsumsize; /* size of cluster summary array */ + INT32 fs_maxsymlinklen; /* max length of an internal symlink */ + INT32 fs_old_inodefmt; /* format of on-disk inodes */ + UINT64 fs_maxfilesize; /* maximum representable file size */ + INT64 fs_qbmask; /* ~fs_bmask for use with 64-bit size */ + INT64 fs_qfmask; /* ~fs_fmask for use with 64-bit size */ + INT32 fs_state; /* validate fs_clean field (UNUSED) */ + INT32 fs_old_postblformat; /* format of positional layout tables */ + INT32 fs_old_nrpos; /* number of rotational positions */ + INT32 fs_spare5[2]; /* old fs_postbloff */ + /* old fs_rotbloff */ + INT32 fs_magic; /* magic number */ +} FFSD_SUPER_BLOCK, *PFFSD_SUPER_BLOCK; + +#define MAXPARTITIONS 16 /* number of partitions */ +#define NDDATA 5 +#define NSPARE 5 + +typedef struct disklabel { + UINT32 d_magic; /* the magic number */ + UINT16 d_type; /* drive type */ + UINT16 d_subtype; /* controller/d_type specific */ + char d_typename[16]; /* type name, e.g. "eagle" */ + + /* + * d_packname contains the pack identifier and is returned when + * the disklabel is read off the disk or in-core copy. + * d_boot0 and d_boot1 are the (optional) names of the + * primary (block 0) and secondary (block 1-15) bootstraps + * as found in /usr/mdec. These are returned when using + * getdiskbyname(3) to retrieve the values from /etc/disktab. + */ + union { + char un_d_packname[16]; /* pack identifier */ + struct { + char *un_d_boot0; /* primary bootstrap name */ + char *un_d_boot1; /* secondary bootstrap name */ + } un_b; + } d_un; + + /* disk geometry: */ + UINT32 d_secsize; /* # of bytes per sector */ + UINT32 d_nsectors; /* # of data sectors per track */ + UINT32 d_ntracks; /* # of tracks per cylinder */ + UINT32 d_ncylinders; /* # of data cylinders per unit */ + UINT32 d_secpercyl; /* # of data sectors per cylinder */ + UINT32 d_secperunit; /* # of data sectors per unit */ + + /* + * Spares (bad sector replacements) below are not counted in + * d_nsectors or d_secpercyl. Spare sectors are assumed to + * be physical sectors which occupy space at the end of each + * track and/or cylinder. + */ + UINT16 d_sparespertrack; /* # of spare sectors per track */ + UINT16 d_sparespercyl; /* # of spare sectors per cylinder */ + /* + * Alternative cylinders include maintenance, replacement, + * configuration description areas, etc. + */ + UINT32 d_acylinders; /* # of alt. cylinders per unit */ + + /* hardware characteristics: */ + /* + * d_interleave, d_trackskew and d_cylskew describe perturbations + * in the media format used to compensate for a slow controller. + * Interleave is physical sector interleave, set up by the + * formatter or controller when formatting. When interleaving is + * in use, logically adjacent sectors are not physically + * contiguous, but instead are separated by some number of + * sectors. It is specified as the ratio of physical sectors + * traversed per logical sector. Thus an interleave of 1:1 + * implies contiguous layout, while 2:1 implies that logical + * sector 0 is separated by one sector from logical sector 1. + * d_trackskew is the offset of sector 0 on track N relative to + * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew + * is the offset of sector 0 on cylinder N relative to sector 0 + * on cylinder N-1. + */ + UINT16 d_rpm; /* rotational speed */ + UINT16 d_interleave; /* hardware sector interleave */ + UINT16 d_trackskew; /* sector 0 skew, per track */ + UINT16 d_cylskew; /* sector 0 skew, per cylinder */ + UINT32 d_headswitch; /* head switch time, usec */ + UINT32 d_trkseek; /* track-to-track seek, usec */ + UINT32 d_flags; /* generic flags */ + UINT32 d_drivedata[NDDATA]; /* drive-type specific information */ + UINT32 d_spare[NSPARE]; /* reserved for future use */ + UINT32 d_magic2; /* the magic number (again) */ + UINT16 d_checksum; /* xor of data incl. partitions */ + + /* filesystem and partition information: */ + UINT16 d_npartitions; /* number of partitions in following */ + UINT32 d_bbsize; /* size of boot area at sn0, bytes */ + UINT32 d_sbsize; /* max size of fs superblock, bytes */ + struct partition { /* the partition table */ + UINT32 p_size; /* number of sectors in partition */ + UINT32 p_offset; /* starting sector */ + union { + UINT32 fsize; /* FFS, ADOS: + filesystem basic fragment size */ + UINT32 cdsession; /* ISO9660: session offset */ + } __partition_u2; + UINT8 p_fstype; /* filesystem type, see below */ + UINT8 p_frag; /* filesystem fragments per block */ + union { + UINT16 cpg; /* UFS: FS cylinders per group */ + UINT16 sgs; /* LFS: FS segment shift */ + } __partition_u1; + } d_partitions[MAXPARTITIONS]; /* actually may be more */ +} FFSD_DISKLABEL, *PFFSD_DISKLABEL; +#include + +C_ASSERT(FIELD_OFFSET(FFSD_SUPER_BLOCK, fs_cgsize) == 160); +C_ASSERT(FIELD_OFFSET(FFSD_SUPER_BLOCK, fs_fmod) == 208); +C_ASSERT(FIELD_OFFSET(FFSD_SUPER_BLOCK, fs_ocsp) == 728); + +#define SBLOCK_UFS1 8192 +#define SBLOCK_UFS2 65536 + +#define SBLOCKSIZE 8192 + +/* + * File system identification + */ +#define FS_UFS1_MAGIC 0x011954 /* UFS1 fast file system magic number */ +#define FS_UFS2_MAGIC 0x19540119 /* UFS2 fast file system magic number */ + +#define DISKMAGIC ((UINT32)0x82564557) /* The disk magic number */ + +#define LABELSECTOR 1 /* sector containing label */ + +#define FS_BSDFFS 7 /* 4.2BSD fast file system */ diff --git a/reactos/drivers/filesystems/fs_rec/fs_rec.c b/reactos/drivers/filesystems/fs_rec/fs_rec.c index c4ba8b93380..f096087d7cb 100644 --- a/reactos/drivers/filesystems/fs_rec/fs_rec.c +++ b/reactos/drivers/filesystems/fs_rec/fs_rec.c @@ -176,6 +176,12 @@ FsRecFsControl(IN PDEVICE_OBJECT DeviceObject, Status = FsRecReiserfsFsControl(DeviceObject, Irp); break; + case FS_TYPE_FFS: + + /* Send FFS command */ + Status = FsRecFfsFsControl(DeviceObject, Irp); + break; + default: /* Unrecognized FS */ @@ -414,6 +420,16 @@ DriverEntry(IN PDRIVER_OBJECT DriverObject, FILE_DEVICE_DISK_FILE_SYSTEM); if (NT_SUCCESS(Status)) DeviceCount++; + /* Register FFS */ + Status = FsRecRegisterFs(DriverObject, + NULL, + NULL, + L"\\ffs", + L"\\FileSystem\\FfsRecognizer", + FS_TYPE_FFS, + FILE_DEVICE_DISK_FILE_SYSTEM); + if (NT_SUCCESS(Status)) DeviceCount++; + /* Return appropriate Status */ return (DeviceCount > 0) ? STATUS_SUCCESS : STATUS_IMAGE_ALREADY_LOADED; } diff --git a/reactos/drivers/filesystems/fs_rec/fs_rec.h b/reactos/drivers/filesystems/fs_rec/fs_rec.h index 6e4cf77892b..4e062e2ff4b 100644 --- a/reactos/drivers/filesystems/fs_rec/fs_rec.h +++ b/reactos/drivers/filesystems/fs_rec/fs_rec.h @@ -176,6 +176,7 @@ typedef enum _FILE_SYSTEM_TYPE FS_TYPE_EXT2, FS_TYPE_BTRFS, FS_TYPE_REISERFS, + FS_TYPE_FFS, } FILE_SYSTEM_TYPE, *PFILE_SYSTEM_TYPE; /* FS Recognizer State */ @@ -244,6 +245,13 @@ FsRecReiserfsFsControl( IN PIRP Irp ); +NTSTATUS +NTAPI +FsRecFfsFsControl( + IN PDEVICE_OBJECT DeviceObject, + IN PIRP Irp +); + BOOLEAN NTAPI FsRecGetDeviceSectors(