4d6660eb36
Fix a bug in udf where it would write uid/gid = 0 to the disk for files owned by the id given with the uid=/gid= mount options. It also adds 4 new mount options: uid/gid=forget and uid/gid=ignore. Without any options the id in core and on disk always match. Giving uid/gid=nnn specifies a default ID to be used in core when the on disk ID is -1. uid/gid=ignore forces the in core ID to allways be used no matter what the on disk ID is. uid/gid=forget forces the on disk ID to always be written out as -1. The use of these options allows you to override ownerships on a disk or disable ownwership information from being written, allowing the media to be used portably between different computers and possibly different users without permissions issues that would require root to correct. Signed-off-by: Phillip Susi <psusi@cfl.rr.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
142 lines
5.3 KiB
C
142 lines
5.3 KiB
C
#ifndef __LINUX_UDF_SB_H
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#define __LINUX_UDF_SB_H
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/* Since UDF 2.01 is ISO 13346 based... */
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#define UDF_SUPER_MAGIC 0x15013346
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#define UDF_MAX_READ_VERSION 0x0201
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#define UDF_MAX_WRITE_VERSION 0x0201
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#define UDF_FLAG_USE_EXTENDED_FE 0
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#define UDF_VERS_USE_EXTENDED_FE 0x0200
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#define UDF_FLAG_USE_STREAMS 1
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#define UDF_VERS_USE_STREAMS 0x0200
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#define UDF_FLAG_USE_SHORT_AD 2
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#define UDF_FLAG_USE_AD_IN_ICB 3
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#define UDF_FLAG_USE_FILE_CTIME_EA 4
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#define UDF_FLAG_STRICT 5
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#define UDF_FLAG_UNDELETE 6
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#define UDF_FLAG_UNHIDE 7
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#define UDF_FLAG_VARCONV 8
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#define UDF_FLAG_NLS_MAP 9
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#define UDF_FLAG_UTF8 10
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#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
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#define UDF_FLAG_UID_IGNORE 12 /* use sb uid instead of on disk uid */
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#define UDF_FLAG_GID_FORGET 13
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#define UDF_FLAG_GID_IGNORE 14
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#define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
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#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
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#define UDF_PART_FLAG_FREED_BITMAP 0x0004
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#define UDF_PART_FLAG_FREED_TABLE 0x0008
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#define UDF_PART_FLAG_READ_ONLY 0x0010
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#define UDF_PART_FLAG_WRITE_ONCE 0x0020
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#define UDF_PART_FLAG_REWRITABLE 0x0040
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#define UDF_PART_FLAG_OVERWRITABLE 0x0080
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static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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#define UDF_SB_FREE(X)\
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{\
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if (UDF_SB(X))\
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{\
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kfree(UDF_SB_PARTMAPS(X));\
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UDF_SB_PARTMAPS(X) = NULL;\
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}\
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}
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#define UDF_SB_ALLOC_PARTMAPS(X,Y)\
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{\
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UDF_SB_PARTMAPS(X) = kmalloc(sizeof(struct udf_part_map) * Y, GFP_KERNEL);\
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if (UDF_SB_PARTMAPS(X) != NULL)\
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{\
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UDF_SB_NUMPARTS(X) = Y;\
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memset(UDF_SB_PARTMAPS(X), 0x00, sizeof(struct udf_part_map) * Y);\
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}\
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else\
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{\
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UDF_SB_NUMPARTS(X) = 0;\
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udf_error(X, __FUNCTION__, "Unable to allocate space for %d partition maps", Y);\
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}\
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}
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#define UDF_SB_ALLOC_BITMAP(X,Y,Z)\
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{\
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int nr_groups = ((UDF_SB_PARTLEN((X),(Y)) + (sizeof(struct spaceBitmapDesc) << 3) +\
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((X)->s_blocksize * 8) - 1) / ((X)->s_blocksize * 8));\
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int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
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if (size <= PAGE_SIZE)\
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UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap = kmalloc(size, GFP_KERNEL);\
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else\
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UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap = vmalloc(size);\
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if (UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap != NULL)\
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{\
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memset(UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap, 0x00, size);\
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UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_block_bitmap =\
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(struct buffer_head **)(UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap + 1);\
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UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_nr_groups = nr_groups;\
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}\
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else\
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{\
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udf_error(X, __FUNCTION__, "Unable to allocate space for bitmap and %d buffer_head pointers", nr_groups);\
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}\
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}
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#define UDF_SB_FREE_BITMAP(X,Y,Z)\
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{\
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int i;\
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int nr_groups = UDF_SB_BITMAP_NR_GROUPS(X,Y,Z);\
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int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
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for (i=0; i<nr_groups; i++)\
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{\
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if (UDF_SB_BITMAP(X,Y,Z,i))\
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udf_release_data(UDF_SB_BITMAP(X,Y,Z,i));\
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}\
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if (size <= PAGE_SIZE)\
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kfree(UDF_SB_PARTMAPS(X)[Y].Z.s_bitmap);\
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else\
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vfree(UDF_SB_PARTMAPS(X)[Y].Z.s_bitmap);\
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}
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#define UDF_QUERY_FLAG(X,Y) ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
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#define UDF_SET_FLAG(X,Y) ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
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#define UDF_CLEAR_FLAG(X,Y) ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )
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#define UDF_UPDATE_UDFREV(X,Y) ( ((Y) > UDF_SB_UDFREV(X)) ? UDF_SB_UDFREV(X) = (Y) : UDF_SB_UDFREV(X) )
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#define UDF_SB_PARTMAPS(X) ( UDF_SB(X)->s_partmaps )
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#define UDF_SB_PARTTYPE(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_type )
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#define UDF_SB_PARTROOT(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_root )
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#define UDF_SB_PARTLEN(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_len )
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#define UDF_SB_PARTVSN(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_volumeseqnum )
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#define UDF_SB_PARTNUM(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_num )
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#define UDF_SB_TYPESPAR(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_type_specific.s_sparing )
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#define UDF_SB_TYPEVIRT(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_type_specific.s_virtual )
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#define UDF_SB_PARTFUNC(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_func )
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#define UDF_SB_PARTFLAGS(X,Y) ( UDF_SB_PARTMAPS(X)[(Y)].s_partition_flags )
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#define UDF_SB_BITMAP(X,Y,Z,I) ( UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_block_bitmap[I] )
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#define UDF_SB_BITMAP_NR_GROUPS(X,Y,Z) ( UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_nr_groups )
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#define UDF_SB_VOLIDENT(X) ( UDF_SB(X)->s_volident )
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#define UDF_SB_NUMPARTS(X) ( UDF_SB(X)->s_partitions )
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#define UDF_SB_PARTITION(X) ( UDF_SB(X)->s_partition )
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#define UDF_SB_SESSION(X) ( UDF_SB(X)->s_session )
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#define UDF_SB_ANCHOR(X) ( UDF_SB(X)->s_anchor )
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#define UDF_SB_LASTBLOCK(X) ( UDF_SB(X)->s_lastblock )
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#define UDF_SB_LVIDBH(X) ( UDF_SB(X)->s_lvidbh )
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#define UDF_SB_LVID(X) ( (struct logicalVolIntegrityDesc *)UDF_SB_LVIDBH(X)->b_data )
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#define UDF_SB_LVIDIU(X) ( (struct logicalVolIntegrityDescImpUse *)&(UDF_SB_LVID(X)->impUse[le32_to_cpu(UDF_SB_LVID(X)->numOfPartitions) * 2 * sizeof(uint32_t)/sizeof(uint8_t)]) )
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#define UDF_SB_UMASK(X) ( UDF_SB(X)->s_umask )
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#define UDF_SB_GID(X) ( UDF_SB(X)->s_gid )
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#define UDF_SB_UID(X) ( UDF_SB(X)->s_uid )
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#define UDF_SB_RECORDTIME(X) ( UDF_SB(X)->s_recordtime )
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#define UDF_SB_SERIALNUM(X) ( UDF_SB(X)->s_serialnum )
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#define UDF_SB_UDFREV(X) ( UDF_SB(X)->s_udfrev )
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#define UDF_SB_FLAGS(X) ( UDF_SB(X)->s_flags )
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#define UDF_SB_VAT(X) ( UDF_SB(X)->s_vat )
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#endif /* __LINUX_UDF_SB_H */
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