50c2f75388
This should be the last big batch of whitespace/formatting fixes. checkpatch warnings for the cifs directory are down about 90% and many of the remaining ones are harder to remove or make the code harder to read. Signed-off-by: Steve French <sfrench@us.ibm.com>
367 lines
10 KiB
C
367 lines
10 KiB
C
/*
|
|
* fs/cifs/xattr.c
|
|
*
|
|
* Copyright (c) International Business Machines Corp., 2003, 2007
|
|
* Author(s): Steve French (sfrench@us.ibm.com)
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/posix_acl_xattr.h>
|
|
#include "cifsfs.h"
|
|
#include "cifspdu.h"
|
|
#include "cifsglob.h"
|
|
#include "cifsproto.h"
|
|
#include "cifs_debug.h"
|
|
|
|
#define MAX_EA_VALUE_SIZE 65535
|
|
#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
|
|
#define CIFS_XATTR_USER_PREFIX "user."
|
|
#define CIFS_XATTR_SYSTEM_PREFIX "system."
|
|
#define CIFS_XATTR_OS2_PREFIX "os2."
|
|
#define CIFS_XATTR_SECURITY_PREFIX ".security"
|
|
#define CIFS_XATTR_TRUSTED_PREFIX "trusted."
|
|
#define XATTR_TRUSTED_PREFIX_LEN 8
|
|
#define XATTR_SECURITY_PREFIX_LEN 9
|
|
/* BB need to add server (Samba e.g) support for security and trusted prefix */
|
|
|
|
|
|
|
|
int cifs_removexattr(struct dentry *direntry, const char *ea_name)
|
|
{
|
|
int rc = -EOPNOTSUPP;
|
|
#ifdef CONFIG_CIFS_XATTR
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct super_block *sb;
|
|
char *full_path;
|
|
|
|
if (direntry == NULL)
|
|
return -EIO;
|
|
if (direntry->d_inode == NULL)
|
|
return -EIO;
|
|
sb = direntry->d_inode->i_sb;
|
|
if (sb == NULL)
|
|
return -EIO;
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
if (ea_name == NULL) {
|
|
cFYI(1, ("Null xattr names not supported"));
|
|
} else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5)
|
|
&& (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4))) {
|
|
cFYI(1,
|
|
("illegal xattr request %s (only user namespace supported)",
|
|
ea_name));
|
|
/* BB what if no namespace prefix? */
|
|
/* Should we just pass them to server, except for
|
|
system and perhaps security prefixes? */
|
|
} else {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
|
|
goto remove_ea_exit;
|
|
|
|
ea_name += 5; /* skip past user. prefix */
|
|
rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, NULL,
|
|
(__u16)0, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
}
|
|
remove_ea_exit:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
#endif
|
|
return rc;
|
|
}
|
|
|
|
int cifs_setxattr(struct dentry *direntry, const char *ea_name,
|
|
const void *ea_value, size_t value_size, int flags)
|
|
{
|
|
int rc = -EOPNOTSUPP;
|
|
#ifdef CONFIG_CIFS_XATTR
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct super_block *sb;
|
|
char *full_path;
|
|
|
|
if (direntry == NULL)
|
|
return -EIO;
|
|
if (direntry->d_inode == NULL)
|
|
return -EIO;
|
|
sb = direntry->d_inode->i_sb;
|
|
if (sb == NULL)
|
|
return -EIO;
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
/* return dos attributes as pseudo xattr */
|
|
/* return alt name if available as pseudo attr */
|
|
|
|
/* if proc/fs/cifs/streamstoxattr is set then
|
|
search server for EAs or streams to
|
|
returns as xattrs */
|
|
if (value_size > MAX_EA_VALUE_SIZE) {
|
|
cFYI(1, ("size of EA value too large"));
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
if (ea_name == NULL) {
|
|
cFYI(1, ("Null xattr names not supported"));
|
|
} else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
|
|
goto set_ea_exit;
|
|
if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
|
|
cFYI(1, ("attempt to set cifs inode metadata"));
|
|
}
|
|
ea_name += 5; /* skip past user. prefix */
|
|
rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
|
|
(__u16)value_size, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
|
|
goto set_ea_exit;
|
|
|
|
ea_name += 4; /* skip past os2. prefix */
|
|
rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
|
|
(__u16)value_size, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else {
|
|
int temp;
|
|
temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
|
|
strlen(POSIX_ACL_XATTR_ACCESS));
|
|
if (temp == 0) {
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
if (sb->s_flags & MS_POSIXACL)
|
|
rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
|
|
ea_value, (const int)value_size,
|
|
ACL_TYPE_ACCESS, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
cFYI(1, ("set POSIX ACL rc %d", rc));
|
|
#else
|
|
cFYI(1, ("set POSIX ACL not supported"));
|
|
#endif
|
|
} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
|
|
strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
if (sb->s_flags & MS_POSIXACL)
|
|
rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
|
|
ea_value, (const int)value_size,
|
|
ACL_TYPE_DEFAULT, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
cFYI(1, ("set POSIX default ACL rc %d", rc));
|
|
#else
|
|
cFYI(1, ("set default POSIX ACL not supported"));
|
|
#endif
|
|
} else {
|
|
cFYI(1, ("illegal xattr request %s (only user namespace supported)", ea_name));
|
|
/* BB what if no namespace prefix? */
|
|
/* Should we just pass them to server, except for
|
|
system and perhaps security prefixes? */
|
|
}
|
|
}
|
|
|
|
set_ea_exit:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
#endif
|
|
return rc;
|
|
}
|
|
|
|
ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
|
|
void *ea_value, size_t buf_size)
|
|
{
|
|
ssize_t rc = -EOPNOTSUPP;
|
|
#ifdef CONFIG_CIFS_XATTR
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct super_block *sb;
|
|
char *full_path;
|
|
|
|
if (direntry == NULL)
|
|
return -EIO;
|
|
if (direntry->d_inode == NULL)
|
|
return -EIO;
|
|
sb = direntry->d_inode->i_sb;
|
|
if (sb == NULL)
|
|
return -EIO;
|
|
|
|
xid = GetXid();
|
|
|
|
cifs_sb = CIFS_SB(sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
/* return dos attributes as pseudo xattr */
|
|
/* return alt name if available as pseudo attr */
|
|
if (ea_name == NULL) {
|
|
cFYI(1, ("Null xattr names not supported"));
|
|
} else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
|
|
goto get_ea_exit;
|
|
|
|
if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
|
|
cFYI(1, ("attempt to query cifs inode metadata"));
|
|
/* revalidate/getattr then populate from inode */
|
|
} /* BB add else when above is implemented */
|
|
ea_name += 5; /* skip past user. prefix */
|
|
rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
|
|
buf_size, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
|
|
goto get_ea_exit;
|
|
|
|
ea_name += 4; /* skip past os2. prefix */
|
|
rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
|
|
buf_size, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
} else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
|
|
strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
if (sb->s_flags & MS_POSIXACL)
|
|
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
|
|
ea_value, buf_size, ACL_TYPE_ACCESS,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
/* else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
|
|
__u16 fid;
|
|
int oplock = FALSE;
|
|
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
|
FILE_OPEN, GENERIC_READ, 0, &fid,
|
|
&oplock, NULL, cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
if(rc == 0) {
|
|
rc = CIFSSMBGetCIFSACL(xid, pTcon, fid,
|
|
ea_value, buf_size,
|
|
ACL_TYPE_ACCESS);
|
|
CIFSSMBClose(xid, pTcon, fid);
|
|
}
|
|
} */ /* BB enable after fixing up return data */
|
|
#else
|
|
cFYI(1, ("query POSIX ACL not supported yet"));
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
} else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
|
|
strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
if (sb->s_flags & MS_POSIXACL)
|
|
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
|
|
ea_value, buf_size, ACL_TYPE_DEFAULT,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
#else
|
|
cFYI(1, ("query POSIX default ACL not supported yet"));
|
|
#endif
|
|
} else if (strncmp(ea_name,
|
|
CIFS_XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
|
|
cFYI(1, ("Trusted xattr namespace not supported yet"));
|
|
} else if (strncmp(ea_name,
|
|
CIFS_XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
|
|
cFYI(1, ("Security xattr namespace not supported yet"));
|
|
} else {
|
|
cFYI(1,
|
|
("illegal xattr request %s (only user namespace supported)",
|
|
ea_name));
|
|
}
|
|
|
|
/* We could add an additional check for streams ie
|
|
if proc/fs/cifs/streamstoxattr is set then
|
|
search server for EAs or streams to
|
|
returns as xattrs */
|
|
|
|
if (rc == -EINVAL)
|
|
rc = -EOPNOTSUPP;
|
|
|
|
get_ea_exit:
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
#endif
|
|
return rc;
|
|
}
|
|
|
|
ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
|
|
{
|
|
ssize_t rc = -EOPNOTSUPP;
|
|
#ifdef CONFIG_CIFS_XATTR
|
|
int xid;
|
|
struct cifs_sb_info *cifs_sb;
|
|
struct cifsTconInfo *pTcon;
|
|
struct super_block *sb;
|
|
char *full_path;
|
|
|
|
if (direntry == NULL)
|
|
return -EIO;
|
|
if (direntry->d_inode == NULL)
|
|
return -EIO;
|
|
sb = direntry->d_inode->i_sb;
|
|
if (sb == NULL)
|
|
return -EIO;
|
|
|
|
cifs_sb = CIFS_SB(sb);
|
|
pTcon = cifs_sb->tcon;
|
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
|
|
return -EOPNOTSUPP;
|
|
|
|
xid = GetXid();
|
|
|
|
full_path = build_path_from_dentry(direntry);
|
|
if (full_path == NULL) {
|
|
FreeXid(xid);
|
|
return -ENOMEM;
|
|
}
|
|
/* return dos attributes as pseudo xattr */
|
|
/* return alt name if available as pseudo attr */
|
|
|
|
/* if proc/fs/cifs/streamstoxattr is set then
|
|
search server for EAs or streams to
|
|
returns as xattrs */
|
|
rc = CIFSSMBQAllEAs(xid, pTcon, full_path, data, buf_size,
|
|
cifs_sb->local_nls,
|
|
cifs_sb->mnt_cifs_flags &
|
|
CIFS_MOUNT_MAP_SPECIAL_CHR);
|
|
|
|
kfree(full_path);
|
|
FreeXid(xid);
|
|
#endif
|
|
return rc;
|
|
}
|