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@ -32,68 +32,19 @@
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#include "cifs_unicode.h"
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#define MAX_EA_VALUE_SIZE 65535
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#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
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#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
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/* BB need to add server (Samba e.g) support for security and trusted prefix */
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int cifs_removexattr(struct dentry *direntry, const char *ea_name)
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enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT };
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static int cifs_xattr_set(const struct xattr_handler *handler,
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struct dentry *dentry, const char *name,
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const void *value, size_t size, int flags)
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{
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int rc = -EOPNOTSUPP;
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#ifdef CONFIG_CIFS_XATTR
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unsigned int xid;
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struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
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struct tcon_link *tlink;
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struct cifs_tcon *pTcon;
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char *full_path = NULL;
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tlink = cifs_sb_tlink(cifs_sb);
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if (IS_ERR(tlink))
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return PTR_ERR(tlink);
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pTcon = tlink_tcon(tlink);
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xid = get_xid();
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full_path = build_path_from_dentry(direntry);
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if (full_path == NULL) {
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rc = -ENOMEM;
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goto remove_ea_exit;
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}
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if (ea_name == NULL) {
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cifs_dbg(FYI, "Null xattr names not supported\n");
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} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
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&& (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
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cifs_dbg(FYI,
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"illegal xattr request %s (only user namespace supported)\n",
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ea_name);
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/* BB what if no namespace prefix? */
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/* Should we just pass them to server, except for
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system and perhaps security prefixes? */
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} else {
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
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goto remove_ea_exit;
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ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
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if (pTcon->ses->server->ops->set_EA)
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rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
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full_path, ea_name, NULL, (__u16)0,
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cifs_sb->local_nls, cifs_remap(cifs_sb));
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}
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remove_ea_exit:
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kfree(full_path);
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free_xid(xid);
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cifs_put_tlink(tlink);
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#endif
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return rc;
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}
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int cifs_setxattr(struct dentry *direntry, const char *ea_name,
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const void *ea_value, size_t value_size, int flags)
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{
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int rc = -EOPNOTSUPP;
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#ifdef CONFIG_CIFS_XATTR
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unsigned int xid;
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struct super_block *sb = direntry->d_sb;
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struct super_block *sb = dentry->d_sb;
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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struct tcon_link *tlink;
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struct cifs_tcon *pTcon;
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@ -106,10 +57,10 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
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xid = get_xid();
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full_path = build_path_from_dentry(direntry);
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full_path = build_path_from_dentry(dentry);
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if (full_path == NULL) {
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rc = -ENOMEM;
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goto set_ea_exit;
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goto out;
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}
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/* return dos attributes as pseudo xattr */
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/* return alt name if available as pseudo attr */
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@ -117,109 +68,88 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
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/* if proc/fs/cifs/streamstoxattr is set then
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search server for EAs or streams to
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returns as xattrs */
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if (value_size > MAX_EA_VALUE_SIZE) {
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if (size > MAX_EA_VALUE_SIZE) {
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cifs_dbg(FYI, "size of EA value too large\n");
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rc = -EOPNOTSUPP;
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goto set_ea_exit;
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goto out;
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}
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if (ea_name == NULL) {
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cifs_dbg(FYI, "Null xattr names not supported\n");
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} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
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== 0) {
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switch (handler->flags) {
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case XATTR_USER:
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
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goto set_ea_exit;
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if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
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cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
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goto out;
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ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
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if (pTcon->ses->server->ops->set_EA)
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rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
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full_path, ea_name, ea_value, (__u16)value_size,
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full_path, name, value, (__u16)size,
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cifs_sb->local_nls, cifs_remap(cifs_sb));
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} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
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== 0) {
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
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goto set_ea_exit;
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break;
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ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
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if (pTcon->ses->server->ops->set_EA)
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rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
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full_path, ea_name, ea_value, (__u16)value_size,
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cifs_sb->local_nls, cifs_remap(cifs_sb));
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} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
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strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
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case XATTR_CIFS_ACL: {
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#ifdef CONFIG_CIFS_ACL
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struct cifs_ntsd *pacl;
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pacl = kmalloc(value_size, GFP_KERNEL);
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if (!value)
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goto out;
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pacl = kmalloc(size, GFP_KERNEL);
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if (!pacl) {
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rc = -ENOMEM;
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} else {
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memcpy(pacl, ea_value, value_size);
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if (pTcon->ses->server->ops->set_acl)
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memcpy(pacl, value, size);
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if (value &&
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pTcon->ses->server->ops->set_acl)
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rc = pTcon->ses->server->ops->set_acl(pacl,
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value_size, d_inode(direntry),
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size, d_inode(dentry),
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full_path, CIFS_ACL_DACL);
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else
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rc = -EOPNOTSUPP;
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if (rc == 0) /* force revalidate of the inode */
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CIFS_I(d_inode(direntry))->time = 0;
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CIFS_I(d_inode(dentry))->time = 0;
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kfree(pacl);
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}
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#else
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cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
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#endif /* CONFIG_CIFS_ACL */
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} else {
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int temp;
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temp = strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
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strlen(XATTR_NAME_POSIX_ACL_ACCESS));
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if (temp == 0) {
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#ifdef CONFIG_CIFS_POSIX
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if (sb->s_flags & MS_POSIXACL)
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rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
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ea_value, (const int)value_size,
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ACL_TYPE_ACCESS, cifs_sb->local_nls,
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cifs_remap(cifs_sb));
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cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc);
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#else
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cifs_dbg(FYI, "set POSIX ACL not supported\n");
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#endif
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} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
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strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
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#ifdef CONFIG_CIFS_POSIX
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if (sb->s_flags & MS_POSIXACL)
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rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
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ea_value, (const int)value_size,
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ACL_TYPE_DEFAULT, cifs_sb->local_nls,
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cifs_remap(cifs_sb));
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cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc);
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#else
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cifs_dbg(FYI, "set default POSIX ACL not supported\n");
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#endif
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} else {
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cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n",
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ea_name);
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/* BB what if no namespace prefix? */
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/* Should we just pass them to server, except for
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system and perhaps security prefixes? */
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}
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break;
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}
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set_ea_exit:
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case XATTR_ACL_ACCESS:
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#ifdef CONFIG_CIFS_POSIX
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if (!value)
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goto out;
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if (sb->s_flags & MS_POSIXACL)
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rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
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value, (const int)size,
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ACL_TYPE_ACCESS, cifs_sb->local_nls,
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cifs_remap(cifs_sb));
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#endif /* CONFIG_CIFS_POSIX */
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break;
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case XATTR_ACL_DEFAULT:
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#ifdef CONFIG_CIFS_POSIX
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if (!value)
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goto out;
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if (sb->s_flags & MS_POSIXACL)
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rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
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value, (const int)size,
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ACL_TYPE_DEFAULT, cifs_sb->local_nls,
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cifs_remap(cifs_sb));
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#endif /* CONFIG_CIFS_POSIX */
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break;
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}
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out:
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kfree(full_path);
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free_xid(xid);
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cifs_put_tlink(tlink);
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#endif
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return rc;
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}
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ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
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const char *ea_name, void *ea_value, size_t buf_size)
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static int cifs_xattr_get(const struct xattr_handler *handler,
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struct dentry *dentry, struct inode *inode,
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const char *name, void *value, size_t size)
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{
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ssize_t rc = -EOPNOTSUPP;
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#ifdef CONFIG_CIFS_XATTR
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unsigned int xid;
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struct super_block *sb = direntry->d_sb;
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struct super_block *sb = dentry->d_sb;
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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struct tcon_link *tlink;
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struct cifs_tcon *pTcon;
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@ -232,98 +162,72 @@ ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
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xid = get_xid();
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full_path = build_path_from_dentry(direntry);
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full_path = build_path_from_dentry(dentry);
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if (full_path == NULL) {
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rc = -ENOMEM;
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goto get_ea_exit;
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goto out;
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}
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/* return dos attributes as pseudo xattr */
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/* return alt name if available as pseudo attr */
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if (ea_name == NULL) {
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cifs_dbg(FYI, "Null xattr names not supported\n");
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} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
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== 0) {
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switch (handler->flags) {
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case XATTR_USER:
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
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goto get_ea_exit;
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goto out;
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if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
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cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
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/* revalidate/getattr then populate from inode */
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} /* BB add else when above is implemented */
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ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
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if (pTcon->ses->server->ops->query_all_EAs)
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rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
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full_path, ea_name, ea_value, buf_size,
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full_path, name, value, size,
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cifs_sb->local_nls, cifs_remap(cifs_sb));
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} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
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goto get_ea_exit;
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break;
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ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
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if (pTcon->ses->server->ops->query_all_EAs)
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rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
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full_path, ea_name, ea_value, buf_size,
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cifs_sb->local_nls, cifs_remap(cifs_sb));
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|
|
} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
|
|
|
|
|
strlen(XATTR_NAME_POSIX_ACL_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_remap(cifs_sb));
|
|
|
|
|
#else
|
|
|
|
|
cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
|
|
|
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
|
|
|
} else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
|
|
|
|
|
strlen(XATTR_NAME_POSIX_ACL_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_remap(cifs_sb));
|
|
|
|
|
#else
|
|
|
|
|
cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
|
|
|
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
|
|
|
} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
|
|
|
|
|
strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
|
|
|
|
|
case XATTR_CIFS_ACL: {
|
|
|
|
|
#ifdef CONFIG_CIFS_ACL
|
|
|
|
|
u32 acllen;
|
|
|
|
|
struct cifs_ntsd *pacl;
|
|
|
|
|
u32 acllen;
|
|
|
|
|
struct cifs_ntsd *pacl;
|
|
|
|
|
|
|
|
|
|
if (pTcon->ses->server->ops->get_acl == NULL)
|
|
|
|
|
goto get_ea_exit; /* rc already EOPNOTSUPP */
|
|
|
|
|
if (pTcon->ses->server->ops->get_acl == NULL)
|
|
|
|
|
goto out; /* rc already EOPNOTSUPP */
|
|
|
|
|
|
|
|
|
|
pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
|
|
|
|
|
inode, full_path, &acllen);
|
|
|
|
|
if (IS_ERR(pacl)) {
|
|
|
|
|
rc = PTR_ERR(pacl);
|
|
|
|
|
cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
|
|
|
|
|
__func__, rc);
|
|
|
|
|
} else {
|
|
|
|
|
if (ea_value) {
|
|
|
|
|
if (acllen > buf_size)
|
|
|
|
|
acllen = -ERANGE;
|
|
|
|
|
else
|
|
|
|
|
memcpy(ea_value, pacl, acllen);
|
|
|
|
|
}
|
|
|
|
|
rc = acllen;
|
|
|
|
|
kfree(pacl);
|
|
|
|
|
pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
|
|
|
|
|
inode, full_path, &acllen);
|
|
|
|
|
if (IS_ERR(pacl)) {
|
|
|
|
|
rc = PTR_ERR(pacl);
|
|
|
|
|
cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
|
|
|
|
|
__func__, rc);
|
|
|
|
|
} else {
|
|
|
|
|
if (value) {
|
|
|
|
|
if (acllen > size)
|
|
|
|
|
acllen = -ERANGE;
|
|
|
|
|
else
|
|
|
|
|
memcpy(value, pacl, acllen);
|
|
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
cifs_dbg(FYI, "Query CIFS ACL not supported yet\n");
|
|
|
|
|
#endif /* CONFIG_CIFS_ACL */
|
|
|
|
|
} else if (strncmp(ea_name,
|
|
|
|
|
XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
|
|
|
|
|
cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n");
|
|
|
|
|
} else if (strncmp(ea_name,
|
|
|
|
|
XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
|
|
|
|
|
cifs_dbg(FYI, "Security xattr namespace not supported yet\n");
|
|
|
|
|
} else
|
|
|
|
|
cifs_dbg(FYI,
|
|
|
|
|
"illegal xattr request %s (only user namespace supported)\n",
|
|
|
|
|
ea_name);
|
|
|
|
|
rc = acllen;
|
|
|
|
|
kfree(pacl);
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_CIFS_ACL */
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
case XATTR_ACL_ACCESS:
|
|
|
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
|
|
|
if (sb->s_flags & MS_POSIXACL)
|
|
|
|
|
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
|
|
|
|
|
value, size, ACL_TYPE_ACCESS,
|
|
|
|
|
cifs_sb->local_nls,
|
|
|
|
|
cifs_remap(cifs_sb));
|
|
|
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case XATTR_ACL_DEFAULT:
|
|
|
|
|
#ifdef CONFIG_CIFS_POSIX
|
|
|
|
|
if (sb->s_flags & MS_POSIXACL)
|
|
|
|
|
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
|
|
|
|
|
value, size, ACL_TYPE_DEFAULT,
|
|
|
|
|
cifs_sb->local_nls,
|
|
|
|
|
cifs_remap(cifs_sb));
|
|
|
|
|
#endif /* CONFIG_CIFS_POSIX */
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* We could add an additional check for streams ie
|
|
|
|
|
if proc/fs/cifs/streamstoxattr is set then
|
|
|
|
@ -333,18 +237,16 @@ ssize_t cifs_getxattr(struct dentry *direntry, struct inode *inode,
|
|
|
|
|
if (rc == -EINVAL)
|
|
|
|
|
rc = -EOPNOTSUPP;
|
|
|
|
|
|
|
|
|
|
get_ea_exit:
|
|
|
|
|
out:
|
|
|
|
|
kfree(full_path);
|
|
|
|
|
free_xid(xid);
|
|
|
|
|
cifs_put_tlink(tlink);
|
|
|
|
|
#endif
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
|
|
|
|
|
{
|
|
|
|
|
ssize_t rc = -EOPNOTSUPP;
|
|
|
|
|
#ifdef CONFIG_CIFS_XATTR
|
|
|
|
|
unsigned int xid;
|
|
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
|
|
|
|
|
struct tcon_link *tlink;
|
|
|
|
@ -381,6 +283,50 @@ list_ea_exit:
|
|
|
|
|
kfree(full_path);
|
|
|
|
|
free_xid(xid);
|
|
|
|
|
cifs_put_tlink(tlink);
|
|
|
|
|
#endif
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct xattr_handler cifs_user_xattr_handler = {
|
|
|
|
|
.prefix = XATTR_USER_PREFIX,
|
|
|
|
|
.flags = XATTR_USER,
|
|
|
|
|
.get = cifs_xattr_get,
|
|
|
|
|
.set = cifs_xattr_set,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* os2.* attributes are treated like user.* attributes */
|
|
|
|
|
static const struct xattr_handler cifs_os2_xattr_handler = {
|
|
|
|
|
.prefix = XATTR_OS2_PREFIX,
|
|
|
|
|
.flags = XATTR_USER,
|
|
|
|
|
.get = cifs_xattr_get,
|
|
|
|
|
.set = cifs_xattr_set,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const struct xattr_handler cifs_cifs_acl_xattr_handler = {
|
|
|
|
|
.name = CIFS_XATTR_CIFS_ACL,
|
|
|
|
|
.flags = XATTR_CIFS_ACL,
|
|
|
|
|
.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,
|
|
|
|
|
.get = cifs_xattr_get,
|
|
|
|
|
.set = cifs_xattr_set,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const struct xattr_handler cifs_posix_acl_default_xattr_handler = {
|
|
|
|
|
.name = XATTR_NAME_POSIX_ACL_DEFAULT,
|
|
|
|
|
.flags = XATTR_ACL_DEFAULT,
|
|
|
|
|
.get = cifs_xattr_get,
|
|
|
|
|
.set = cifs_xattr_set,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
const struct xattr_handler *cifs_xattr_handlers[] = {
|
|
|
|
|
&cifs_user_xattr_handler,
|
|
|
|
|
&cifs_os2_xattr_handler,
|
|
|
|
|
&cifs_cifs_acl_xattr_handler,
|
|
|
|
|
&cifs_posix_acl_access_xattr_handler,
|
|
|
|
|
&cifs_posix_acl_default_xattr_handler,
|
|
|
|
|
NULL
|
|
|
|
|
};
|
|
|
|
|