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authorSteve French <smfrench@gmail.com>2014-01-26 23:53:43 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-22 13:34:41 -0800
commitfaadfeb910b78d84ddb006f3c799fbdec3905915 (patch)
tree8d4ef494886f364ec339a80be06429b096227d89 /fs
parentd26ae180e6a5a0ff32cddf15cae2c4af250c9b35 (diff)
CIFS: Fix SMB2 mounts so they don't try to set or get xattrs via cifs
commit 666753c3ef8fc88b0ddd5be4865d0aa66428ac35 upstream. When mounting with smb2 (or smb2.1 or smb3) we need to check to make sure that attempts to query or set extended attributes do not attempt to send the request with the older cifs protocol instead (eventually we also need to add the support in SMB2 to query/set extended attributes but this patch prevents us from using the wrong protocol for extended attribute operations). Signed-off-by: Steve French <smfrench@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifsglob.h6
-rw-r--r--fs/cifs/xattr.c49
2 files changed, 36 insertions, 19 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index f918a998a087..c6dc325af8b7 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -385,6 +385,12 @@ struct smb_version_operations {
struct cifsFileInfo *target_file, u64 src_off, u64 len,
u64 dest_off);
int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
+ ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
+ const unsigned char *, const unsigned char *, char *,
+ size_t, const struct nls_table *, int);
+ int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
+ const char *, const void *, const __u16,
+ const struct nls_table *, int);
};
struct smb_version_values {
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index 09afda4cc58e..95c43bb20335 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -82,9 +82,11 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name)
goto remove_ea_exit;
ea_name += XATTR_USER_PREFIX_LEN; /* 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);
+ if (pTcon->ses->server->ops->set_EA)
+ rc = pTcon->ses->server->ops->set_EA(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);
@@ -149,18 +151,22 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
ea_name += XATTR_USER_PREFIX_LEN; /* 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);
+ if (pTcon->ses->server->ops->set_EA)
+ rc = pTcon->ses->server->ops->set_EA(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, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
== 0) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto set_ea_exit;
ea_name += XATTR_OS2_PREFIX_LEN; /* 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);
+ if (pTcon->ses->server->ops->set_EA)
+ rc = pTcon->ses->server->ops->set_EA(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_CIFS_ACL,
strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
#ifdef CONFIG_CIFS_ACL
@@ -272,17 +278,21 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
/* revalidate/getattr then populate from inode */
} /* BB add else when above is implemented */
ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
- rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
- buf_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (pTcon->ses->server->ops->query_all_EAs)
+ rc = pTcon->ses->server->ops->query_all_EAs(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, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
goto get_ea_exit;
ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
- rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
- buf_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (pTcon->ses->server->ops->query_all_EAs)
+ rc = pTcon->ses->server->ops->query_all_EAs(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
@@ -400,11 +410,12 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
/* if proc/fs/cifs/streamstoxattr is set then
search server for EAs or streams to
returns as xattrs */
- rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data,
- buf_size, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (pTcon->ses->server->ops->query_all_EAs)
+ rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
+ full_path, NULL, data, buf_size,
+ cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
list_ea_exit:
kfree(full_path);
free_xid(xid);