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-rw-r--r--fs/cifs/cifssmb.c27
-rw-r--r--fs/cifs/connect.c2
-rw-r--r--fs/cifs/file.c66
3 files changed, 72 insertions, 23 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index c8ae3ef422ba..74733851cfad 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1082,12 +1082,20 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
int rc = -EACCES;
WRITE_REQ *pSMB = NULL;
WRITE_RSP *pSMBr = NULL;
- int bytes_returned;
+ int bytes_returned, wct;
__u32 bytes_sent;
__u16 byte_count;
/* cFYI(1,("write at %lld %d bytes",offset,count));*/
- rc = smb_init(SMB_COM_WRITE_ANDX, 14, tcon, (void **) &pSMB,
+ if(tcon->ses == NULL)
+ return -ECONNABORTED;
+
+ if(tcon->ses->capabilities & CAP_LARGE_FILES)
+ wct = 14;
+ else
+ wct = 12;
+
+ rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB,
(void **) &pSMBr);
if (rc)
return rc;
@@ -1098,7 +1106,11 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
pSMB->AndXCommand = 0xFF; /* none */
pSMB->Fid = netfid;
pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
- pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ if(wct == 14)
+ pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
+ else if((offset >> 32) > 0) /* can not handle this big offset for old */
+ return -EIO;
+
pSMB->Reserved = 0xFFFFFFFF;
pSMB->WriteMode = 0;
pSMB->Remaining = 0;
@@ -1135,7 +1147,14 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
pSMB->hdr.smb_buf_length += bytes_sent+1;
- pSMB->ByteCount = cpu_to_le16(byte_count);
+
+ if(wct == 14)
+ pSMB->ByteCount = cpu_to_le16(byte_count);
+ else { /* old style write has byte count 4 bytes earlier */
+ struct smb_com_writex_req * pSMBW =
+ (struct smb_com_writex_req *)pSMB;
+ pSMBW->ByteCount = cpu_to_le16(byte_count);
+ }
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, long_op);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index f784b70abfeb..196976049c00 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1079,7 +1079,7 @@ cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
} else if (strnicmp(data, "brl", 3) == 0) {
vol->nobrl = 0;
} else if ((strnicmp(data, "nobrl", 5) == 0) ||
- (strnicmp(data, "nolock", 6)) {
+ (strnicmp(data, "nolock", 6) == 0)) {
vol->nobrl = 1;
/* turn off mandatory locking in mode
if remote locking is turned off since the
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index ef455dda0473..b6c303f6373f 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1183,11 +1183,16 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
char *smb_read_data;
char __user *current_offset;
struct smb_com_read_rsp *pSMBr;
+ int use_old_read = FALSE;
xid = GetXid();
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
pTcon = cifs_sb->tcon;
+ if(pTcon->ses)
+ if((pTcon->ses->capabilities & CAP_LARGE_FILES) == 0)
+ use_old_read = TRUE;
+
if (file->private_data == NULL) {
FreeXid(xid);
return -EBADF;
@@ -1212,16 +1217,21 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
if (rc != 0)
break;
}
-
- rc = CIFSSMBRead(xid, pTcon,
- open_file->netfid,
- current_read_size, *poffset,
- &bytes_read, &smb_read_data);
- if(rc == -EINVAL) {
+ if(use_old_read)
rc = SMBLegacyRead(xid, pTcon,
open_file->netfid,
current_read_size, *poffset,
&bytes_read, &smb_read_data);
+ else {
+ rc = CIFSSMBRead(xid, pTcon,
+ open_file->netfid,
+ current_read_size, *poffset,
+ &bytes_read, &smb_read_data);
+ if(rc == -EINVAL) {
+ use_old_read = TRUE;
+ rc = -EAGAIN;
+ continue;
+ }
}
pSMBr = (struct smb_com_read_rsp *)smb_read_data;
if (copy_to_user(current_offset,
@@ -1266,6 +1276,7 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
int xid;
char *current_offset;
struct cifsFileInfo *open_file;
+ int use_old_read = FALSE;
xid = GetXid();
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
@@ -1276,6 +1287,9 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
return -EBADF;
}
open_file = (struct cifsFileInfo *)file->private_data;
+ if(pTcon->ses)
+ if((pTcon->ses->capabilities & CAP_LARGE_FILES) == 0)
+ use_old_read = TRUE;
if ((file->f_flags & O_ACCMODE) == O_WRONLY)
cFYI(1, ("attempting read on write only file instance"));
@@ -1294,16 +1308,23 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
if (rc != 0)
break;
}
-
- rc = CIFSSMBRead(xid, pTcon,
- open_file->netfid,
- current_read_size, *poffset,
- &bytes_read, &current_offset);
- if(rc == -EINVAL) {
+ if(use_old_read)
rc = SMBLegacyRead(xid, pTcon,
+ open_file->netfid,
+ current_read_size, *poffset,
+ &bytes_read, &current_offset);
+ else {
+ rc = CIFSSMBRead(xid, pTcon,
open_file->netfid,
current_read_size, *poffset,
&bytes_read, &current_offset);
+ /* check if server disavows support for
+ 64 bit offsets */
+ if(rc == -EINVAL) {
+ rc = -EAGAIN;
+ use_old_read = TRUE;
+ continue;
+ }
}
}
if (rc || (bytes_read == 0)) {
@@ -1402,6 +1423,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
struct smb_com_read_rsp *pSMBr;
struct pagevec lru_pvec;
struct cifsFileInfo *open_file;
+ int use_old_read = FALSE;
xid = GetXid();
if (file->private_data == NULL) {
@@ -1411,7 +1433,9 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
open_file = (struct cifsFileInfo *)file->private_data;
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
pTcon = cifs_sb->tcon;
-
+ if(pTcon->ses)
+ if((pTcon->ses->capabilities & CAP_LARGE_FILES) == 0)
+ use_old_read = TRUE;
pagevec_init(&lru_pvec, 0);
for (i = 0; i < num_pages; ) {
@@ -1457,15 +1481,21 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
break;
}
- rc = CIFSSMBRead(xid, pTcon,
- open_file->netfid,
- read_size, offset,
- &bytes_read, &smb_read_data);
- if (rc == -EINVAL) {
+ if(use_old_read)
rc = SMBLegacyRead(xid, pTcon,
open_file->netfid,
read_size, offset,
&bytes_read, &smb_read_data);
+ else {
+ rc = CIFSSMBRead(xid, pTcon,
+ open_file->netfid,
+ read_size, offset,
+ &bytes_read, &smb_read_data);
+ if(rc == -EINVAL) {
+ use_old_read = TRUE;
+ rc = -EAGAIN;
+ continue;
+ }
}
/* BB more RC checks ? */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 03:14:41 +0000