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CIFS: Move is_path_accessible to ops struct
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Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
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Pavel Shilovsky committed Jul 24, 2012
1 parent af4281d commit 68889f2
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Showing 5 changed files with 69 additions and 62 deletions.
3 changes: 3 additions & 0 deletions fs/cifs/cifsglob.h
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Original file line number Diff line number Diff line change
Expand Up @@ -215,6 +215,9 @@ struct smb_version_operations {
unsigned int *, const struct nls_table *, int);
/* informational QFS call */
void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
/* check if a path is accessible or not */
int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
struct cifs_sb_info *, const char *);
};

struct smb_version_values {
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12 changes: 5 additions & 7 deletions fs/cifs/cifsproto.h
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Original file line number Diff line number Diff line change
Expand Up @@ -208,14 +208,12 @@ extern int CIFSFindClose(const unsigned int xid, struct cifs_tcon *tcon,
extern int CIFSSMBQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
u16 netfid, FILE_ALL_INFO *pFindData);
extern int CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_ALL_INFO *findData,
int legacy /* whether to use old info level */,
const struct nls_table *nls_codepage, int remap);
const char *search_Name, FILE_ALL_INFO *data,
int legacy /* whether to use old info level */,
const struct nls_table *nls_codepage, int remap);
extern int SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_ALL_INFO *findData,
const struct nls_table *nls_codepage, int remap);
const char *search_name, FILE_ALL_INFO *data,
const struct nls_table *nls_codepage, int remap);

extern int CIFSSMBUnixQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,
u16 netfid, FILE_UNIX_BASIC_INFO *pFindData);
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60 changes: 30 additions & 30 deletions fs/cifs/cifssmb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3853,18 +3853,18 @@ CIFSSMBSetCIFSACL(const unsigned int xid, struct cifs_tcon *tcon, __u16 fid,

/* Legacy Query Path Information call for lookup to old servers such
as Win9x/WinME */
int SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_ALL_INFO *pFinfo,
const struct nls_table *nls_codepage, int remap)
int
SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
const char *search_name, FILE_ALL_INFO *data,
const struct nls_table *nls_codepage, int remap)
{
QUERY_INFORMATION_REQ *pSMB;
QUERY_INFORMATION_RSP *pSMBr;
int rc = 0;
int bytes_returned;
int name_len;

cFYI(1, "In SMBQPath path %s", searchName);
cFYI(1, "In SMBQPath path %s", search_name);
QInfRetry:
rc = smb_init(SMB_COM_QUERY_INFORMATION, 0, tcon, (void **) &pSMB,
(void **) &pSMBr);
Expand All @@ -3874,14 +3874,14 @@ int SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len =
cifsConvertToUTF16((__le16 *) pSMB->FileName,
searchName, PATH_MAX, nls_codepage,
search_name, PATH_MAX, nls_codepage,
remap);
name_len++; /* trailing null */
name_len *= 2;
} else {
name_len = strnlen(searchName, PATH_MAX);
name_len = strnlen(search_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
strncpy(pSMB->FileName, search_name, name_len);
}
pSMB->BufferFormat = 0x04;
name_len++; /* account for buffer type byte */
Expand All @@ -3892,23 +3892,23 @@ int SMBQueryInformation(const unsigned int xid, struct cifs_tcon *tcon,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
if (rc) {
cFYI(1, "Send error in QueryInfo = %d", rc);
} else if (pFinfo) {
} else if (data) {
struct timespec ts;
__u32 time = le32_to_cpu(pSMBr->last_write_time);

/* decode response */
/* BB FIXME - add time zone adjustment BB */
memset(pFinfo, 0, sizeof(FILE_ALL_INFO));
memset(data, 0, sizeof(FILE_ALL_INFO));
ts.tv_nsec = 0;
ts.tv_sec = time;
/* decode time fields */
pFinfo->ChangeTime = cpu_to_le64(cifs_UnixTimeToNT(ts));
pFinfo->LastWriteTime = pFinfo->ChangeTime;
pFinfo->LastAccessTime = 0;
pFinfo->AllocationSize =
data->ChangeTime = cpu_to_le64(cifs_UnixTimeToNT(ts));
data->LastWriteTime = data->ChangeTime;
data->LastAccessTime = 0;
data->AllocationSize =
cpu_to_le64(le32_to_cpu(pSMBr->size));
pFinfo->EndOfFile = pFinfo->AllocationSize;
pFinfo->Attributes =
data->EndOfFile = data->AllocationSize;
data->Attributes =
cpu_to_le32(le16_to_cpu(pSMBr->attr));
} else
rc = -EIO; /* bad buffer passed in */
Expand Down Expand Up @@ -3990,20 +3990,19 @@ CIFSSMBQFileInfo(const unsigned int xid, struct cifs_tcon *tcon,

int
CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
const unsigned char *searchName,
FILE_ALL_INFO *pFindData,
const char *search_name, FILE_ALL_INFO *data,
int legacy /* old style infolevel */,
const struct nls_table *nls_codepage, int remap)
{
/* level 263 SMB_QUERY_FILE_ALL_INFO */
/* level 263 SMB_QUERY_FILE_ALL_INFO */
TRANSACTION2_QPI_REQ *pSMB = NULL;
TRANSACTION2_QPI_RSP *pSMBr = NULL;
int rc = 0;
int bytes_returned;
int name_len;
__u16 params, byte_count;

/* cFYI(1, "In QPathInfo path %s", searchName); */
/* cFYI(1, "In QPathInfo path %s", search_name); */
QPathInfoRetry:
rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
(void **) &pSMBr);
Expand All @@ -4012,14 +4011,14 @@ CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,

if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len =
cifsConvertToUTF16((__le16 *) pSMB->FileName, searchName,
cifsConvertToUTF16((__le16 *) pSMB->FileName, search_name,
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(searchName, PATH_MAX);
name_len = strnlen(search_name, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
strncpy(pSMB->FileName, search_name, name_len);
}

params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
Expand Down Expand Up @@ -4064,20 +4063,21 @@ CIFSSMBQPathInfo(const unsigned int xid, struct cifs_tcon *tcon,
else if (legacy && get_bcc(&pSMBr->hdr) < 24)
rc = -EIO; /* 24 or 26 expected but we do not read
last field */
else if (pFindData) {
else if (data) {
int size;
__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);

/* On legacy responses we do not read the last field,
EAsize, fortunately since it varies by subdialect and
also note it differs on Set vs. Get, ie two bytes or 4
bytes depending but we don't care here */
/*
* On legacy responses we do not read the last field,
* EAsize, fortunately since it varies by subdialect and
* also note it differs on Set vs Get, ie two bytes or 4
* bytes depending but we don't care here.
*/
if (legacy)
size = sizeof(FILE_INFO_STANDARD);
else
size = sizeof(FILE_ALL_INFO);
memcpy((char *) pFindData,
(char *) &pSMBr->hdr.Protocol +
memcpy((char *) data, (char *) &pSMBr->hdr.Protocol +
data_offset, size);
} else
rc = -ENOMEM;
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31 changes: 6 additions & 25 deletions fs/cifs/connect.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3402,30 +3402,6 @@ cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info)
return rsize;
}

static int
is_path_accessible(unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path)
{
int rc;
FILE_ALL_INFO *pfile_info;

pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (pfile_info == NULL)
return -ENOMEM;

rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
0 /* not legacy */, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);

if (rc == -EOPNOTSUPP || rc == -EINVAL)
rc = SMBQueryInformation(xid, tcon, full_path, pfile_info,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
kfree(pfile_info);
return rc;
}

static void
cleanup_volume_info_contents(struct smb_vol *volume_info)
{
Expand Down Expand Up @@ -3703,13 +3679,18 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)

/* check if a whole path is not remote */
if (!rc && tcon) {
if (!server->ops->is_path_accessible) {
rc = -ENOSYS;
goto mount_fail_check;
}
/* build_path_to_root works only when we have a valid tcon */
full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
if (full_path == NULL) {
rc = -ENOMEM;
goto mount_fail_check;
}
rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
full_path);
if (rc != 0 && rc != -EREMOTE) {
kfree(full_path);
goto mount_fail_check;
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25 changes: 25 additions & 0 deletions fs/cifs/smb1ops.c
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Original file line number Diff line number Diff line change
Expand Up @@ -417,6 +417,30 @@ cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
CIFSSMBQFSAttributeInfo(xid, tcon);
}

static int
cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_sb_info *cifs_sb, const char *full_path)
{
int rc;
FILE_ALL_INFO *file_info;

file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (file_info == NULL)
return -ENOMEM;

rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
0 /* not legacy */, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);

if (rc == -EOPNOTSUPP || rc == -EINVAL)
rc = SMBQueryInformation(xid, tcon, full_path, file_info,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
kfree(file_info);
return rc;
}

struct smb_version_operations smb1_operations = {
.send_cancel = send_nt_cancel,
.compare_fids = cifs_compare_fids,
Expand All @@ -443,6 +467,7 @@ struct smb_version_operations smb1_operations = {
.tree_disconnect = CIFSSMBTDis,
.get_dfs_refer = CIFSGetDFSRefer,
.qfs_tcon = cifs_qfs_tcon,
.is_path_accessible = cifs_is_path_accessible,
};

struct smb_version_values smb1_values = {
Expand Down

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