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CIFS: Move set_file_size to ops struct 

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Pavel Shilovsky 2012-09-18 16:20:31 -07:00 committed by Steve French
parent 568798cc62
commit d143341815
5 changed files with 91 additions and 77 deletions
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6
fs/cifs/cifsglob.h
View File

@ -252,6 +252,12 @@ struct smb_version_operations {
int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
struct cifs_sb_info *, const char *,
u64 *uniqueid, FILE_ALL_INFO *);
/* set size by path */
int (*set_path_size)(const unsigned int, struct cifs_tcon *,
const char *, __u64, struct cifs_sb_info *, bool);
/* set size by file handle */
int (*set_file_size)(const unsigned int, struct cifs_tcon *,
struct cifsFileInfo *, __u64, bool);
/* build a full path to the root of the mount */
char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
struct cifs_tcon *);

10
fs/cifs/cifsproto.h
View File

@ -270,13 +270,11 @@ extern int CIFSSMBSetAttrLegacy(unsigned int xid, struct cifs_tcon *tcon,
const struct nls_table *nls_codepage);
#endif /* possibly unneeded function */
extern int CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
const char *fileName, __u64 size,
bool setAllocationSizeFlag,
const struct nls_table *nls_codepage,
int remap_special_chars);
const char *file_name, __u64 size,
struct cifs_sb_info *cifs_sb, bool set_allocation);
extern int CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
__u64 size, __u16 fileHandle, __u32 opener_pid,
bool AllocSizeFlag);
struct cifsFileInfo *cfile, __u64 size,
bool set_allocation);
struct cifs_unix_set_info_args {
__u64 ctime;

40
fs/cifs/cifssmb.c
View File

@ -5395,16 +5395,16 @@ QFSPosixRetry:
}
/* We can not use write of zero bytes trick to
set file size due to need for large file support. Also note that
this SetPathInfo is preferred to SetFileInfo based method in next
routine which is only needed to work around a sharing violation bug
in Samba which this routine can run into */
/*
* We can not use write of zero bytes trick to set file size due to need for
* large file support. Also note that this SetPathInfo is preferred to
* SetFileInfo based method in next routine which is only needed to work around
* a sharing violation bugin Samba which this routine can run into.
*/
int
CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
const char *fileName, __u64 size, bool SetAllocation,
const struct nls_table *nls_codepage, int remap)
const char *file_name, __u64 size, struct cifs_sb_info *cifs_sb,
bool set_allocation)
{
struct smb_com_transaction2_spi_req *pSMB = NULL;
struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
@ -5412,6 +5412,8 @@ CIFSSMBSetEOF(const unsigned int xid, struct cifs_tcon *tcon,
int name_len;
int rc = 0;
int bytes_returned = 0;
int remap = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR;
__u16 params, byte_count, data_count, param_offset, offset;
cFYI(1, "In SetEOF");
@ -5423,14 +5425,14 @@ SetEOFRetry:
if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len =
cifsConvertToUTF16((__le16 *) pSMB->FileName, fileName,
PATH_MAX, nls_codepage, remap);
cifsConvertToUTF16((__le16 *) pSMB->FileName, file_name,
PATH_MAX, cifs_sb->local_nls, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(fileName, PATH_MAX);
name_len = strnlen(file_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, fileName, name_len);
strncpy(pSMB->FileName, file_name, name_len);
}
params = 6 + name_len;
data_count = sizeof(struct file_end_of_file_info);
@ -5444,7 +5446,7 @@ SetEOFRetry:
param_offset = offsetof(struct smb_com_transaction2_spi_req,
InformationLevel) - 4;
offset = param_offset + params;
if (SetAllocation) {
if (set_allocation) {
if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
pSMB->InformationLevel =
cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
@ -5491,8 +5493,8 @@ SetEOFRetry:
}
int
CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, __u64 size,
__u16 fid, __u32 pid_of_opener, bool SetAllocation)
CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile, __u64 size, bool set_allocation)
{
struct smb_com_transaction2_sfi_req *pSMB = NULL;
struct file_end_of_file_info *parm_data;
@ -5506,8 +5508,8 @@ CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, __u64 size,
if (rc)
return rc;
pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
pSMB->hdr.Pid = cpu_to_le16((__u16)cfile->pid);
pSMB->hdr.PidHigh = cpu_to_le16((__u16)(cfile->pid >> 16));
params = 6;
pSMB->MaxSetupCount = 0;
@ -5536,8 +5538,8 @@ CIFSSMBSetFileSize(const unsigned int xid, struct cifs_tcon *tcon, __u64 size,
+ offset);
pSMB->DataOffset = cpu_to_le16(offset);
parm_data->FileSize = cpu_to_le64(size);
pSMB->Fid = fid;
if (SetAllocation) {
pSMB->Fid = cfile->fid.netfid;
if (set_allocation) {
if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
pSMB->InformationLevel =
cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);

110
fs/cifs/inode.c
View File

@ -1883,7 +1883,8 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = NULL;
struct cifs_tcon *pTcon = NULL;
struct cifs_tcon *tcon = NULL;
struct TCP_Server_Info *server;
struct cifs_io_parms io_parms;
/*
@ -1897,19 +1898,21 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
*/
open_file = find_writable_file(cifsInode, true);
if (open_file) {
__u16 nfid = open_file->fid.netfid;
__u32 npid = open_file->pid;
pTcon = tlink_tcon(open_file->tlink);
rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
npid, false);
tcon = tlink_tcon(open_file->tlink);
server = tcon->ses->server;
if (server->ops->set_file_size)
rc = server->ops->set_file_size(xid, tcon, open_file,
attrs->ia_size, false);
else
rc = -ENOSYS;
cifsFileInfo_put(open_file);
cFYI(1, "SetFSize for attrs rc = %d", rc);
if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
unsigned int bytes_written;
io_parms.netfid = nfid;
io_parms.pid = npid;
io_parms.tcon = pTcon;
io_parms.netfid = open_file->fid.netfid;
io_parms.pid = open_file->pid;
io_parms.tcon = tcon;
io_parms.offset = 0;
io_parms.length = attrs->ia_size;
rc = CIFSSMBWrite(xid, &io_parms, &bytes_written,
@ -1919,52 +1922,55 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
} else
rc = -EINVAL;
if (rc != 0) {
if (pTcon == NULL) {
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return PTR_ERR(tlink);
pTcon = tlink_tcon(tlink);
}
if (!rc)
goto set_size_out;
/* Set file size by pathname rather than by handle
either because no valid, writeable file handle for
it was found or because there was an error setting
it by handle */
rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
false, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
cFYI(1, "SetEOF by path (setattrs) rc = %d", rc);
if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
__u16 netfid;
int oplock = 0;
rc = SMBLegacyOpen(xid, pTcon, full_path,
FILE_OPEN, GENERIC_WRITE,
CREATE_NOT_DIR, &netfid, &oplock, NULL,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc == 0) {
unsigned int bytes_written;
io_parms.netfid = netfid;
io_parms.pid = current->tgid;
io_parms.tcon = pTcon;
io_parms.offset = 0;
io_parms.length = attrs->ia_size;
rc = CIFSSMBWrite(xid, &io_parms,
&bytes_written,
NULL, NULL, 1);
cFYI(1, "wrt seteof rc %d", rc);
CIFSSMBClose(xid, pTcon, netfid);
}
}
if (tlink)
cifs_put_tlink(tlink);
if (tcon == NULL) {
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return PTR_ERR(tlink);
tcon = tlink_tcon(tlink);
server = tcon->ses->server;
}
/*
* Set file size by pathname rather than by handle either because no
* valid, writeable file handle for it was found or because there was
* an error setting it by handle.
*/
if (server->ops->set_path_size)
rc = server->ops->set_path_size(xid, tcon, full_path,
attrs->ia_size, cifs_sb, false);
else
rc = -ENOSYS;
cFYI(1, "SetEOF by path (setattrs) rc = %d", rc);
if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
__u16 netfid;
int oplock = 0;
rc = SMBLegacyOpen(xid, tcon, full_path, FILE_OPEN,
GENERIC_WRITE, CREATE_NOT_DIR, &netfid,
&oplock, NULL, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc == 0) {
unsigned int bytes_written;
io_parms.netfid = netfid;
io_parms.pid = current->tgid;
io_parms.tcon = tcon;
io_parms.offset = 0;
io_parms.length = attrs->ia_size;
rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, NULL,
NULL, 1);
cFYI(1, "wrt seteof rc %d", rc);
CIFSSMBClose(xid, tcon, netfid);
}
}
if (tlink)
cifs_put_tlink(tlink);
set_size_out:
if (rc == 0) {
cifsInode->server_eof = attrs->ia_size;
cifs_setsize(inode, attrs->ia_size);

2
fs/cifs/smb1ops.c
View File

@ -793,6 +793,8 @@ struct smb_version_operations smb1_operations = {
.query_path_info = cifs_query_path_info,
.query_file_info = cifs_query_file_info,
.get_srv_inum = cifs_get_srv_inum,
.set_path_size = CIFSSMBSetEOF,
.set_file_size = CIFSSMBSetFileSize,
.build_path_to_root = cifs_build_path_to_root,
.echo = CIFSSMBEcho,
.mkdir = CIFSSMBMkDir,