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authorSteve French <sfrench@us.ibm.com>2006-10-02 05:53:29 +0000
committerSteve French <sfrench@us.ibm.com>2006-10-02 05:53:29 +0000
commitb815f1e559e7cbdf3e561cf0c7cffc4a4a57a013 (patch)
tree0ff77669363276a97bd4e3cc1b3dcea928c97545 /fs/cifs
parent203cf2fc13a5db1fb202c294948fa9cb43bf69fa (diff)
[CIFS] Allow for 15 minute TZs (e.g. Nepal) and be more explicit about
not setting time on close Signed-off-by: Guenter Kukkukk <linux@kukkukk.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/cifspdu.h4
-rw-r--r--fs/cifs/cifssmb.c35
2 files changed, 25 insertions, 14 deletions
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 50505422dbb4..6df9dadba647 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -409,6 +409,8 @@ typedef struct negotiate_req {
/* Dialect index is 13 for LANMAN */
+#define MIN_TZ_ADJ (15 * 60) /* minimum grid for timezones in seconds */
+
typedef struct lanman_neg_rsp {
struct smb_hdr hdr; /* wct = 13 */
__le16 DialectIndex;
@@ -678,7 +680,7 @@ typedef union smb_com_tree_disconnect { /* as an altetnative can use flag on
typedef struct smb_com_close_req {
struct smb_hdr hdr; /* wct = 3 */
__u16 FileID;
- __u32 LastWriteTime; /* should be zero */
+ __u32 LastWriteTime; /* should be zero or -1 */
__u16 ByteCount; /* 0 */
} __attribute__((packed)) CLOSE_REQ;
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 75f060328e29..8d30a5c4f244 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -450,7 +450,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
} else if((pSMBr->hdr.WordCount == 13)
&& ((pSMBr->DialectIndex == LANMAN_PROT)
|| (pSMBr->DialectIndex == LANMAN2_PROT))) {
- int tmp, adjust;
+ __s16 tmp;
struct lanman_neg_rsp * rsp = (struct lanman_neg_rsp *)pSMBr;
if((secFlags & CIFSSEC_MAY_LANMAN) ||
@@ -476,14 +476,16 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
server->maxRw = 0;/* we do not need to use raw anyway */
server->capabilities = CAP_MPX_MODE;
}
- tmp = le16_to_cpu(rsp->ServerTimeZone);
- if (tmp == (int)0xffff) {
+ tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone);
+ if (tmp == 0xffff) {
/* OS/2 often does not set timezone therefore
* we must use server time to calc time zone.
- * Could deviate slightly from the right zone. Not easy
- * to adjust, since timezones are not always a multiple
- * of 60 (sometimes 30 minutes - are there smaller?)
+ * Could deviate slightly from the right zone.
+ * Smallest defined timezone difference is 15 minutes
+ * (i.e. Nepal). Rounding up/down is done to match
+ * this requirement.
*/
+ int val, seconds, remain, result;
struct timespec ts, utc;
utc = CURRENT_TIME;
ts = cnvrtDosUnixTm(le16_to_cpu(rsp->SrvTime.Date),
@@ -491,12 +493,18 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
cFYI(1,("SrvTime: %d sec since 1970 (utc: %d) diff: %d",
(int)ts.tv_sec, (int)utc.tv_sec,
(int)(utc.tv_sec - ts.tv_sec)));
- tmp = (int)(utc.tv_sec - ts.tv_sec);
- adjust = tmp < 0 ? -29 : 29;
- tmp = ((tmp + adjust) / 60) * 60;
- server->timeAdj = tmp;
+ val = (int)(utc.tv_sec - ts.tv_sec);
+ seconds = val < 0 ? -val : val;
+ result = (seconds / IN_TZ_ADJ) * MIN_TZ_ADJ;
+ remain = seconds % MIN_TZ_ADJ;
+ if(remain >= (MIN_TZ_ADJ / 2))
+ result += MIN_TZ_ADJ;
+ if(val < 0)
+ result = - result;
+ server->timeAdj = result;
} else {
- server->timeAdj = tmp * 60; /* also in seconds */
+ server->timeAdj = (int)tmp;
+ server->timeAdj *= 60; /* also in seconds */
}
cFYI(1,("server->timeAdj: %d seconds", server->timeAdj));
@@ -559,7 +567,8 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
cFYI(0, ("Max buf = %d", ses->server->maxBuf));
GETU32(ses->server->sessid) = le32_to_cpu(pSMBr->SessionKey);
server->capabilities = le32_to_cpu(pSMBr->Capabilities);
- server->timeAdj = le16_to_cpu(pSMBr->ServerTimeZone) * 60;
+ server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
+ server->timeAdj *= 60;
if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
memcpy(server->cryptKey, pSMBr->u.EncryptionKey,
CIFS_CRYPTO_KEY_SIZE);
@@ -1645,7 +1654,7 @@ CIFSSMBClose(const int xid, struct cifsTconInfo *tcon, int smb_file_id)
pSMBr = (CLOSE_RSP *)pSMB; /* BB removeme BB */
pSMB->FileID = (__u16) smb_file_id;
- pSMB->LastWriteTime = 0;
+ pSMB->LastWriteTime = 0xFFFFFFFF;
pSMB->ByteCount = 0;
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);