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dc5d39be6d
- convert UDF_SB_ALLOC_PARTMAPS macro to udf_sb_alloc_partition_maps function - convert kmalloc + memset to kcalloc - check if kcalloc failed (partially) Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Ben Fennema <bfennema@falcon.csc.calpoly.edu> Cc: Jan Kara <jack@suse.cz> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
89 lines
3.1 KiB
C
89 lines
3.1 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_FLAG_UID_SET 15
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#define UDF_FLAG_GID_SET 16
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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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struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
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#define UDF_SB_ALLOC_BITMAP(X,Y,Z)\
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{\
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struct udf_sb_info *sbi = UDF_SB(X);\
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int nr_groups = ((sbi->s_partmaps[(Y)].s_partition_len + (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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sbi->s_partmaps[(Y)].Z.s_bitmap = kmalloc(size, GFP_KERNEL);\
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else\
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sbi->s_partmaps[(Y)].Z.s_bitmap = vmalloc(size);\
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if (sbi->s_partmaps[(Y)].Z.s_bitmap != NULL) {\
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memset(sbi->s_partmaps[(Y)].Z.s_bitmap, 0x00, size);\
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sbi->s_partmaps[(Y)].Z.s_bitmap->s_block_bitmap =\
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(struct buffer_head **)(sbi->s_partmaps[(Y)].Z.s_bitmap + 1);\
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sbi->s_partmaps[(Y)].Z.s_bitmap->s_nr_groups = nr_groups;\
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} else {\
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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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if (UDF_SB_BITMAP(X,Y,Z,i))\
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brelse(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(X)->s_partmaps[Y].Z.s_bitmap);\
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else\
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vfree(UDF_SB(X)->s_partmaps[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_SB_BITMAP(X,Y,Z,I) ( UDF_SB(X)->s_partmaps[(Y)].Z.s_bitmap->s_block_bitmap[I] )
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#define UDF_SB_BITMAP_NR_GROUPS(X,Y,Z) ( UDF_SB(X)->s_partmaps[(Y)].Z.s_bitmap->s_nr_groups )
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#endif /* __LINUX_UDF_SB_H */
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