diff options
| -rw-r--r-- | fs/cifs/xattr.c | 128 |
1 files changed, 117 insertions, 11 deletions
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index db4ba8f6077e..b8299173ea7e 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -32,7 +32,8 @@ #include "cifs_unicode.h" #define MAX_EA_VALUE_SIZE CIFSMaxBufSize -#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" +#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */ +#define CIFS_XATTR_CIFS_NTSD "system.cifs_ntsd" /* owner plus DACL */ #define CIFS_XATTR_ATTRIB "cifs.dosattrib" /* full name: user.cifs.dosattrib */ #define CIFS_XATTR_CREATETIME "cifs.creationtime" /* user.cifs.creationtime */ /* @@ -40,12 +41,62 @@ * confusing users and using the 20+ year old term 'cifs' when it is no longer * secure, replaced by SMB2 (then even more highly secure SMB3) many years ago */ -#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" +#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" /* DACL only */ +#define SMB3_XATTR_CIFS_NTSD "system.smb3_ntsd" /* owner plus DACL */ #define SMB3_XATTR_ATTRIB "smb3.dosattrib" /* full name: user.smb3.dosattrib */ #define SMB3_XATTR_CREATETIME "smb3.creationtime" /* user.smb3.creationtime */ /* BB need to add server (Samba e.g) support for security and trusted prefix */ -enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT }; +enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT, + XATTR_CIFS_NTSD }; + +static int cifs_attrib_set(unsigned int xid, struct cifs_tcon *pTcon, + struct inode *inode, char *full_path, + const void *value, size_t size) +{ + ssize_t rc = -EOPNOTSUPP; + __u32 *pattrib = (__u32 *)value; + __u32 attrib; + FILE_BASIC_INFO info_buf; + + if ((value == NULL) || (size != sizeof(__u32))) + return -ERANGE; + + memset(&info_buf, 0, sizeof(info_buf)); + attrib = *pattrib; + info_buf.Attributes = cpu_to_le32(attrib); + if (pTcon->ses->server->ops->set_file_info) + rc = pTcon->ses->server->ops->set_file_info(inode, full_path, + &info_buf, xid); + if (rc == 0) + CIFS_I(inode)->cifsAttrs = attrib; + + return rc; +} + +static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon, + struct inode *inode, char *full_path, + const void *value, size_t size) +{ + ssize_t rc = -EOPNOTSUPP; + __u64 *pcreation_time = (__u64 *)value; + __u64 creation_time; + FILE_BASIC_INFO info_buf; + + if ((value == NULL) || (size != sizeof(__u64))) + return -ERANGE; + + memset(&info_buf, 0, sizeof(info_buf)); + creation_time = *pcreation_time; + info_buf.CreationTime = cpu_to_le64(creation_time); + if (pTcon->ses->server->ops->set_file_info) + rc = pTcon->ses->server->ops->set_file_info(inode, full_path, + &info_buf, xid); + if (rc == 0) + CIFS_I(inode)->createtime = creation_time; + + return rc; +} static int cifs_xattr_set(const struct xattr_handler *handler, struct dentry *dentry, struct inode *inode, @@ -86,6 +137,23 @@ static int cifs_xattr_set(const struct xattr_handler *handler, switch (handler->flags) { case XATTR_USER: + cifs_dbg(FYI, "%s:setting user xattr %s\n", __func__, name); + if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) || + (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) { + rc = cifs_attrib_set(xid, pTcon, inode, full_path, + value, size); + if (rc == 0) /* force revalidate of the inode */ + CIFS_I(inode)->time = 0; + break; + } else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) || + (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) { + rc = cifs_creation_time_set(xid, pTcon, inode, + full_path, value, size); + if (rc == 0) /* force revalidate of the inode */ + CIFS_I(inode)->time = 0; + break; + } + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) goto out; @@ -95,7 +163,8 @@ static int cifs_xattr_set(const struct xattr_handler *handler, cifs_sb->local_nls, cifs_sb); break; - case XATTR_CIFS_ACL: { + case XATTR_CIFS_ACL: + case XATTR_CIFS_NTSD: { struct cifs_ntsd *pacl; if (!value) @@ -106,12 +175,25 @@ static int cifs_xattr_set(const struct xattr_handler *handler, } else { memcpy(pacl, value, size); if (value && - pTcon->ses->server->ops->set_acl) - rc = pTcon->ses->server->ops->set_acl(pacl, - size, inode, - full_path, CIFS_ACL_DACL); - else + pTcon->ses->server->ops->set_acl) { + rc = 0; + if (handler->flags == XATTR_CIFS_NTSD) { + /* set owner and DACL */ + rc = pTcon->ses->server->ops->set_acl( + pacl, size, inode, + full_path, + CIFS_ACL_OWNER); + } + if (rc == 0) { + /* set DACL */ + rc = pTcon->ses->server->ops->set_acl( + pacl, size, inode, + full_path, + CIFS_ACL_DACL); + } + } else { rc = -EOPNOTSUPP; + } if (rc == 0) /* force revalidate of the inode */ CIFS_I(inode)->time = 0; kfree(pacl); @@ -179,7 +261,7 @@ static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode, void *value, size_t size) { ssize_t rc; - __u64 * pcreatetime; + __u64 *pcreatetime; rc = cifs_revalidate_dentry_attr(dentry); if (rc) @@ -244,7 +326,9 @@ static int cifs_xattr_get(const struct xattr_handler *handler, full_path, name, value, size, cifs_sb); break; - case XATTR_CIFS_ACL: { + case XATTR_CIFS_ACL: + case XATTR_CIFS_NTSD: { + /* the whole ntsd is fetched regardless */ u32 acllen; struct cifs_ntsd *pacl; @@ -382,6 +466,26 @@ static const struct xattr_handler smb3_acl_xattr_handler = { .set = cifs_xattr_set, }; +static const struct xattr_handler cifs_cifs_ntsd_xattr_handler = { + .name = CIFS_XATTR_CIFS_NTSD, + .flags = XATTR_CIFS_NTSD, + .get = cifs_xattr_get, + .set = cifs_xattr_set, +}; + +/* + * Although this is just an alias for the above, need to move away from + * confusing users and using the 20 year old term 'cifs' when it is no + * longer secure and was replaced by SMB2/SMB3 a long time ago, and + * SMB3 and later are highly secure. + */ +static const struct xattr_handler smb3_ntsd_xattr_handler = { + .name = SMB3_XATTR_CIFS_NTSD, + .flags = XATTR_CIFS_NTSD, + .get = cifs_xattr_get, + .set = cifs_xattr_set, +}; + static const struct xattr_handler cifs_posix_acl_access_xattr_handler = { .name = XATTR_NAME_POSIX_ACL_ACCESS, .flags = XATTR_ACL_ACCESS, @@ -401,6 +505,8 @@ const struct xattr_handler *cifs_xattr_handlers[] = { &cifs_os2_xattr_handler, &cifs_cifs_acl_xattr_handler, &smb3_acl_xattr_handler, /* alias for above since avoiding "cifs" */ + &cifs_cifs_ntsd_xattr_handler, + &smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */ &cifs_posix_acl_access_xattr_handler, &cifs_posix_acl_default_xattr_handler, NULL |