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Update comment for ntfs_mft_record_get_data_size(). 

(Logical change 1.332)
edge.strict_endians
cantab.net!aia21 2004-03-15 10:54:47 +00:00
parent 011ba54358
commit a8ce4055be
1 changed files with 10 additions and 10 deletions
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20
include/ntfs/mft.h
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@ -82,16 +82,16 @@ static __inline__ int ntfs_mft_record_write(const ntfs_volume *vol,
* @m: mft record to get the data size of
*
* Takes the mft record @m and returns the number of bytes used in the record
* or 0 on error (i.e. @m is not a valid mft record). Zero is not a valid size
* for an mft record as it at least has to have the MFT_RECORD, thus making the
* minimum size:
* (sizeof(MFT_RECORD) + 7) & ~7 + sizeof(ATTR_TYPES) = 52 bytes
* Aside: The 8-byte alignment and the 4 bytes for the attribute type are needed
* as each mft record has to have a list of attributes even if it only contains
* the attribute $END which doesn't contain anything else apart from its type.
* Also, you would expect every mft record to contain an update sequence array
* as well but that could in theory be non-existent (don't know if Windows'
* NTFS driver/chkdsk wouldn't view this as corruption in itself though).
* or 0 on error (i.e. @m is not a valid mft record). Zero is not a valid size
* for an mft record as it at least has to have the MFT_RECORD itself and a
* zero length attribute of type AT_END, thus making the minimum size 56 bytes.
*
* Aside: The size is independent of NTFS versions 1.x/3.x because the 8-byte
* alignment of the first attribute mask the difference in MFT_RECORD size
* between NTFS 1.x and 3.x. Also, you would expect every mft record to
* contain an update sequence array as well but that could in theory be
* non-existent (don't know if Windows' NTFS driver/chkdsk wouldn't view this
* as corruption in itself though).
*/
static __inline__ u32 ntfs_mft_record_get_data_size(const MFT_RECORD *m)
{