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[CIFS] Legacy time handling for Win9x and OS/2 part 1

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Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2006-09-28 03:35:57 +00:00
parent 0889a9441d
commit 1bd5bbcb65
6 changed files with 80 additions and 4 deletions
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3
fs/cifs/cifsproto.h
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@ -80,6 +80,9 @@ extern struct oplock_q_entry * AllocOplockQEntry(struct inode *, u16,
extern void DeleteOplockQEntry(struct oplock_q_entry *);
extern struct timespec cifs_NTtimeToUnix(u64 /* utc nanoseconds since 1601 */ );
extern u64 cifs_UnixTimeToNT(struct timespec);
extern __le64 cnvrtDosCifsTm(__u16 date, __u16 time);
extern struct timespec cnvrtDosUnixTm(__u16 date, __u16 time);
extern int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path,
FILE_ALL_INFO * pfile_info,

10
fs/cifs/cifssmb.c
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@ -2856,7 +2856,6 @@ qsec_out:
return rc;
}
/* Legacy Query Path Information call for lookup to old servers such
as Win9x/WinME */
int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
@ -2898,7 +2897,16 @@ QInfRetry:
if (rc) {
cFYI(1, ("Send error in QueryInfo = %d", rc));
} else if (pFinfo) { /* decode response */
struct timespec ts;
__u32 time = le32_to_cpu(pSMBr->last_write_time);
/* BB FIXME - add time zone adjustment BB */
memset(pFinfo, 0, sizeof(FILE_ALL_INFO));
ts.tv_nsec = 0;
ts.tv_sec = time;
/* decode time fields */
pFinfo->ChangeTime = cifs_UnixTimeToNT(ts);
pFinfo->LastWriteTime = pFinfo->ChangeTime;
pFinfo->LastAccessTime = 0;
pFinfo->AllocationSize =
cpu_to_le64(le32_to_cpu(pSMBr->size));
pFinfo->EndOfFile = pFinfo->AllocationSize;

7
fs/cifs/inode.c
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@ -432,8 +432,11 @@ int cifs_get_inode_info(struct inode **pinode,
(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
/* Linux can not store file creation time so ignore it */
inode->i_atime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
if(pfindData->LastAccessTime)
inode->i_atime = cifs_NTtimeToUnix
(le64_to_cpu(pfindData->LastAccessTime));
else /* do not need to use current_fs_time - time not stored */
inode->i_atime = CURRENT_TIME;
inode->i_mtime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
inode->i_ctime =

6
fs/cifs/link.c
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@ -254,7 +254,11 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
tmpbuffer,
len - 1,
cifs_sb->local_nls);
else {
else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
cERROR(1,("SFU style symlinks not implemented yet"));
/* add open and read as in fs/cifs/inode.c */
} else {
rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, GENERIC_READ,
OPEN_REPARSE_POINT,&fid, &oplock, NULL,
cifs_sb->local_nls,

51
fs/cifs/netmisc.c
View File

@ -909,3 +909,54 @@ cifs_UnixTimeToNT(struct timespec t)
/* Convert to 100ns intervals and then add the NTFS time offset. */
return (u64) t.tv_sec * 10000000 + t.tv_nsec/100 + NTFS_TIME_OFFSET;
}
static int total_days_of_prev_months[] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
__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;*/
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 += (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));
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;
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;
ts.tv_nsec = 0;
return ts;
}

7
fs/cifs/readdir.c
View File

@ -135,12 +135,19 @@ static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
tmp_inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
} else { /* legacy, OS2 and DOS style */
/* struct timespec ts;*/
FIND_FILE_STANDARD_INFO * pfindData =
(FIND_FILE_STANDARD_INFO *)buf;
/* ts = 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 */