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[CIFS] readdir (ffirst) enablement of accurate timestamps from legacy servers

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Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2006-10-06 21:47:09 +00:00
parent 1a70d6529a
commit 268f3be177
2 changed files with 27 additions and 30 deletions
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39
fs/cifs/netmisc.c
View File

@ -918,45 +918,42 @@ __le64 cnvrtDosCifsTm(__u16 date, __u16 time)
{
return cpu_to_le64(cifs_UnixTimeToNT(cnvrtDosUnixTm(date, time)));
}
struct timespec cnvrtDosUnixTm(__u16 date, __u16 time)
{
__u8 dt[2];
__u8 tm[2];
struct timespec ts;
int sec,min, days, month, year;
struct timespec removeme; /* BB removeme BB */
/* SMB_TIME * st = (SMB_TIME *)&time;*/
int sec, min, days, month, year;
SMB_TIME * st = (SMB_TIME *)&time;
SMB_DATE * sd = (SMB_DATE *)&date;
cFYI(1,("date %d time %d",date, time));
dt[0] = date & 0xFF;
dt[1] = (date & 0xFF00) >> 8;
tm[0] = time & 0xFF;
tm[1] = (time & 0xFF00) >> 8;
sec = tm[0] & 0x1F;
sec = 2 * sec;
min = ((tm[0] >>5)&0xFF) + ((tm[1] & 0x7)<<3);
sec = 2 * st->TwoSeconds;
min = st->Minutes;
if((sec > 59) || (min > 59))
cERROR(1,("illegal time min %d sec %d", min, sec));
sec += (min * 60);
sec += 60 * 60 * ((tm[1] >> 3) &0xFF) /* hours */;
days = (dt[0] & 0x1F) - 1;
month = ((dt[0] >> 5) & 0xFF) + ((dt[1] & 0x1) <<3);
if(month > 12)
cERROR(1,("illegal month %d in date", month));
sec += 60 * 60 * st->Hours;
if(st->Hours > 24)
cERROR(1,("illegal hours %d",st->Hours));
days = sd->Day;
month = sd->Month;
if((days > 31) || (month > 12))
cERROR(1,("illegal date, month %d day: %d", month, days));
month -= 1;
days += total_days_of_prev_months[month];
days += 3653; /* account for difference in days between 1980 and 1970 */
year = (dt[1]>>1) & 0xFF;
year = sd->Year;
days += year * 365;
days += (year/4); /* leap year */
/* adjust for leap year where we are still before leap day */
days -= ((year & 0x03) == 0) && (month < 2 ? 1 : 0);
sec += 24 * 60 * 60 * days;
removeme = CURRENT_TIME; /* BB removeme BB */
ts.tv_sec = sec;
/* cFYI(1,("sec after cnvrt dos to unix time %d",sec)); */
ts.tv_nsec = 0;
return ts;
}

18
fs/cifs/readdir.c
View File

@ -139,19 +139,19 @@ static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
FIND_FILE_STANDARD_INFO * pfindData =
(FIND_FILE_STANDARD_INFO *)buf;
/* ts = cnvrtDosUnixTm(
tmp_inode->i_mtime = cnvrtDosUnixTm(
le16_to_cpu(pfindData->LastWriteDate),
le16_to_cpu(pfindData->LastWriteTime));*/
le16_to_cpu(pfindData->LastWriteTime));
tmp_inode->i_atime = cnvrtDosUnixTm(
le16_to_cpu(pfindData->LastAccessDate),
le16_to_cpu(pfindData->LastAccessTime));
tmp_inode->i_ctime = cnvrtDosUnixTm(
le16_to_cpu(pfindData->LastWriteDate),
le16_to_cpu(pfindData->LastWriteTime));
attr = le16_to_cpu(pfindData->Attributes);
allocation_size = le32_to_cpu(pfindData->AllocationSize);
end_of_file = le32_to_cpu(pfindData->DataSize);
/* do not need to use current_fs_time helper function since
time not stored for this case so atime can not "go backwards"
by pulling newer older from disk when inode refrenshed */
tmp_inode->i_atime = CURRENT_TIME;
/* tmp_inode->i_mtime = BB FIXME - add dos time handling
tmp_inode->i_ctime = 0; BB FIXME */
}
/* Linux can not store file creation time unfortunately so ignore it */