HPFS: Fix endianity. Make hpfs work on big-endian machines
Fix endianity. Make hpfs work on big-endian machines. Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mikulas Patocka
committed by
Linus Torvalds
Linus Torvalds
parent
bc8728ee56
commit
0b69760be6
219
fs/hpfs/hpfs.h
219
fs/hpfs/hpfs.h
@@ -19,6 +19,10 @@
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For definitive information on HPFS, ask somebody else -- this is guesswork.
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There are certain to be many mistakes. */
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#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
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#error unknown endian
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#endif
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/* Notation */
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typedef u32 secno; /* sector number, partition relative */
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@@ -86,7 +90,6 @@ struct hpfs_super_block
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secno badblocks; /* bad block list */
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u32 zero3; /* 0 */
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time32_t last_chkdsk; /* date last checked, 0 if never */
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/*u32 zero4;*/ /* 0 */
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time32_t last_optimize; /* date last optimized, 0 if never */
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secno n_dir_band; /* number of sectors in dir band */
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secno dir_band_start; /* first sector in dir band */
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@@ -109,21 +112,44 @@ struct hpfs_spare_block
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u32 magic; /* f991 1849 */
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u32 magic1; /* fa52 29c5, more magic? */
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unsigned dirty: 1; /* 0 clean, 1 "improperly stopped" */
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unsigned sparedir_used: 1; /* spare dirblks used */
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unsigned hotfixes_used: 1; /* hotfixes used */
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unsigned bad_sector: 1; /* bad sector, corrupted disk (???) */
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unsigned bad_bitmap: 1; /* bad bitmap */
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unsigned fast: 1; /* partition was fast formatted */
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unsigned old_wrote: 1; /* old version wrote to partion */
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unsigned old_wrote_1: 1; /* old version wrote to partion (?) */
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unsigned install_dasd_limits: 1; /* HPFS386 flags */
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unsigned resynch_dasd_limits: 1;
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unsigned dasd_limits_operational: 1;
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unsigned multimedia_active: 1;
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unsigned dce_acls_active: 1;
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unsigned dasd_limits_dirty: 1;
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unsigned flag67: 2;
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#ifdef __LITTLE_ENDIAN
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u8 dirty: 1; /* 0 clean, 1 "improperly stopped" */
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u8 sparedir_used: 1; /* spare dirblks used */
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u8 hotfixes_used: 1; /* hotfixes used */
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u8 bad_sector: 1; /* bad sector, corrupted disk (???) */
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u8 bad_bitmap: 1; /* bad bitmap */
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u8 fast: 1; /* partition was fast formatted */
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u8 old_wrote: 1; /* old version wrote to partion */
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u8 old_wrote_1: 1; /* old version wrote to partion (?) */
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#else
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u8 old_wrote_1: 1; /* old version wrote to partion (?) */
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u8 old_wrote: 1; /* old version wrote to partion */
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u8 fast: 1; /* partition was fast formatted */
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u8 bad_bitmap: 1; /* bad bitmap */
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u8 bad_sector: 1; /* bad sector, corrupted disk (???) */
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u8 hotfixes_used: 1; /* hotfixes used */
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u8 sparedir_used: 1; /* spare dirblks used */
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u8 dirty: 1; /* 0 clean, 1 "improperly stopped" */
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#endif
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#ifdef __LITTLE_ENDIAN
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u8 install_dasd_limits: 1; /* HPFS386 flags */
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u8 resynch_dasd_limits: 1;
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u8 dasd_limits_operational: 1;
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u8 multimedia_active: 1;
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u8 dce_acls_active: 1;
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u8 dasd_limits_dirty: 1;
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u8 flag67: 2;
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#else
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u8 flag67: 2;
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u8 dasd_limits_dirty: 1;
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u8 dce_acls_active: 1;
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u8 multimedia_active: 1;
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u8 dasd_limits_operational: 1;
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u8 resynch_dasd_limits: 1;
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u8 install_dasd_limits: 1; /* HPFS386 flags */
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#endif
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u8 mm_contlgulty;
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u8 unused;
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@@ -255,10 +281,18 @@ struct dnode {
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u32 magic; /* 77e4 0aae */
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u32 first_free; /* offset from start of dnode to
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first free dir entry */
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unsigned root_dnode:1; /* Is it root dnode? */
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unsigned increment_me:31; /* some kind of activity counter?
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Neither HPFS.IFS nor CHKDSK cares
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#ifdef __LITTLE_ENDIAN
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u8 root_dnode: 1; /* Is it root dnode? */
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u8 increment_me: 7; /* some kind of activity counter? */
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/* Neither HPFS.IFS nor CHKDSK cares
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if you change this word */
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#else
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u8 increment_me: 7; /* some kind of activity counter? */
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/* Neither HPFS.IFS nor CHKDSK cares
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if you change this word */
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u8 root_dnode: 1; /* Is it root dnode? */
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#endif
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u8 increment_me2[3];
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secno up; /* (root dnode) directory's fnode
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(nonroot) parent dnode */
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dnode_secno self; /* pointer to this dnode */
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@@ -266,33 +300,59 @@ struct dnode {
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};
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struct hpfs_dirent {
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u16 length; /* offset to next dirent */
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unsigned first: 1; /* set on phony ^A^A (".") entry */
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unsigned has_acl: 1;
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unsigned down: 1; /* down pointer present (after name) */
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unsigned last: 1; /* set on phony \377 entry */
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unsigned has_ea: 1; /* entry has EA */
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unsigned has_xtd_perm: 1; /* has extended perm list (???) */
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unsigned has_explicit_acl: 1;
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unsigned has_needea: 1; /* ?? some EA has NEEDEA set
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u16 length; /* offset to next dirent */
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#ifdef __LITTLE_ENDIAN
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u8 first: 1; /* set on phony ^A^A (".") entry */
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u8 has_acl: 1;
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u8 down: 1; /* down pointer present (after name) */
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u8 last: 1; /* set on phony \377 entry */
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u8 has_ea: 1; /* entry has EA */
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u8 has_xtd_perm: 1; /* has extended perm list (???) */
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u8 has_explicit_acl: 1;
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u8 has_needea: 1; /* ?? some EA has NEEDEA set
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I have no idea why this is
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interesting in a dir entry */
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unsigned read_only: 1; /* dos attrib */
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unsigned hidden: 1; /* dos attrib */
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unsigned system: 1; /* dos attrib */
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unsigned flag11: 1; /* would be volume label dos attrib */
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unsigned directory: 1; /* dos attrib */
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unsigned archive: 1; /* dos attrib */
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unsigned not_8x3: 1; /* name is not 8.3 */
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unsigned flag15: 1;
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#else
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u8 has_needea: 1; /* ?? some EA has NEEDEA set
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I have no idea why this is
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interesting in a dir entry */
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u8 has_explicit_acl: 1;
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u8 has_xtd_perm: 1; /* has extended perm list (???) */
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u8 has_ea: 1; /* entry has EA */
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u8 last: 1; /* set on phony \377 entry */
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u8 down: 1; /* down pointer present (after name) */
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u8 has_acl: 1;
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u8 first: 1; /* set on phony ^A^A (".") entry */
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#endif
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#ifdef __LITTLE_ENDIAN
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u8 read_only: 1; /* dos attrib */
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u8 hidden: 1; /* dos attrib */
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u8 system: 1; /* dos attrib */
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u8 flag11: 1; /* would be volume label dos attrib */
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u8 directory: 1; /* dos attrib */
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u8 archive: 1; /* dos attrib */
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u8 not_8x3: 1; /* name is not 8.3 */
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u8 flag15: 1;
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#else
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u8 flag15: 1;
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u8 not_8x3: 1; /* name is not 8.3 */
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u8 archive: 1; /* dos attrib */
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u8 directory: 1; /* dos attrib */
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u8 flag11: 1; /* would be volume label dos attrib */
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u8 system: 1; /* dos attrib */
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u8 hidden: 1; /* dos attrib */
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u8 read_only: 1; /* dos attrib */
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#endif
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fnode_secno fnode; /* fnode giving allocation info */
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time32_t write_date; /* mtime */
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u32 file_size; /* file length, bytes */
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time32_t read_date; /* atime */
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time32_t creation_date; /* ctime */
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u32 ea_size; /* total EA length, bytes */
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unsigned char no_of_acls : 3; /* number of ACL's */
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unsigned char reserver : 5;
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u8 no_of_acls; /* number of ACL's (low 3 bits) */
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u8 ix; /* code page index (of filename), see
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struct code_page_data */
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u8 namelen, name[1]; /* file name */
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@@ -328,21 +388,33 @@ struct bplus_internal_node
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struct bplus_header
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{
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unsigned hbff: 1; /* high bit of first free entry offset */
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unsigned flag1: 1;
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unsigned flag2: 1;
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unsigned flag3: 1;
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unsigned flag4: 1;
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unsigned fnode_parent: 1; /* ? we're pointed to by an fnode,
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#ifdef __LITTLE_ENDIAN
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u8 hbff: 1; /* high bit of first free entry offset */
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u8 flag1234: 4;
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u8 fnode_parent: 1; /* ? we're pointed to by an fnode,
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the data btree or some ea or the
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main ea bootage pointer ea_secno */
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/* also can get set in fnodes, which
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may be a chkdsk glitch or may mean
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this bit is irrelevant in fnodes,
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or this interpretation is all wet */
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unsigned binary_search: 1; /* suggest binary search (unused) */
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unsigned internal: 1; /* 1 -> (internal) tree of anodes
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u8 binary_search: 1; /* suggest binary search (unused) */
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u8 internal: 1; /* 1 -> (internal) tree of anodes
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0 -> (leaf) list of extents */
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#else
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u8 internal: 1; /* 1 -> (internal) tree of anodes
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0 -> (leaf) list of extents */
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u8 binary_search: 1; /* suggest binary search (unused) */
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u8 fnode_parent: 1; /* ? we're pointed to by an fnode,
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the data btree or some ea or the
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main ea bootage pointer ea_secno */
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/* also can get set in fnodes, which
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may be a chkdsk glitch or may mean
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this bit is irrelevant in fnodes,
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or this interpretation is all wet */
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u8 flag1234: 4;
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u8 hbff: 1; /* high bit of first free entry offset */
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#endif
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u8 fill[3];
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u8 n_free_nodes; /* free nodes in following array */
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u8 n_used_nodes; /* used nodes in following array */
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@@ -379,23 +451,25 @@ struct fnode
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secno ea_secno; /* first sector of disk-resident ea's*/
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u16 ea_size_s; /* length of fnode-resident ea's */
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unsigned flag0: 1;
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unsigned ea_anode: 1; /* 1 -> ea_secno is an anode */
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unsigned flag2: 1;
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unsigned flag3: 1;
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unsigned flag4: 1;
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unsigned flag5: 1;
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unsigned flag6: 1;
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unsigned flag7: 1;
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unsigned dirflag: 1; /* 1 -> directory. first & only extent
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#ifdef __LITTLE_ENDIAN
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u8 flag0: 1;
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u8 ea_anode: 1; /* 1 -> ea_secno is an anode */
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u8 flag234567: 6;
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#else
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u8 flag234567: 6;
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u8 ea_anode: 1; /* 1 -> ea_secno is an anode */
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u8 flag0: 1;
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#endif
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#ifdef __LITTLE_ENDIAN
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u8 dirflag: 1; /* 1 -> directory. first & only extent
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points to dnode. */
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unsigned flag9: 1;
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unsigned flag10: 1;
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unsigned flag11: 1;
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unsigned flag12: 1;
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unsigned flag13: 1;
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unsigned flag14: 1;
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unsigned flag15: 1;
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u8 flag9012345: 7;
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#else
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u8 flag9012345: 7;
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u8 dirflag: 1; /* 1 -> directory. first & only extent
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points to dnode. */
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#endif
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struct bplus_header btree; /* b+ tree, 8 extents or 12 subtrees */
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union {
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@@ -456,16 +530,21 @@ struct anode
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struct extended_attribute
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{
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unsigned indirect: 1; /* 1 -> value gives sector number
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#ifdef __LITTLE_ENDIAN
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u8 indirect: 1; /* 1 -> value gives sector number
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where real value starts */
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unsigned anode: 1; /* 1 -> sector is an anode
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u8 anode: 1; /* 1 -> sector is an anode
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that points to fragmented value */
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unsigned flag2: 1;
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unsigned flag3: 1;
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unsigned flag4: 1;
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unsigned flag5: 1;
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unsigned flag6: 1;
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unsigned needea: 1; /* required ea */
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u8 flag23456: 5;
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u8 needea: 1; /* required ea */
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#else
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u8 needea: 1; /* required ea */
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u8 flag23456: 5;
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u8 anode: 1; /* 1 -> sector is an anode
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that points to fragmented value */
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u8 indirect: 1; /* 1 -> value gives sector number
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where real value starts */
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#endif
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u8 namelen; /* length of name, bytes */
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u16 valuelen; /* length of value, bytes */
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u8 name[0];
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