Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a958fff2 authored by Steve French's avatar Steve French
Browse files

Add way to query file attributes via cifs xattr 



Add parsing for new pseudo-xattr user.cifs.dosattrib file attribute
so tools can recognize what kind of file it is, and verify if common
SMB3 attributes (system, hidden, archive, sparse, indexed etc.) are
set.

Signed-off-by: default avatarSteve French <steve.french@primarydata.com>
Reviewed-by: default avatarPavel Shilovsky <pshilovsky@samba.org>
parent 1573d2ca

fs/cifs/xattr.c

+33 −1
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 


#define MAX_EA_VALUE_SIZE 65535

#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"

#define CIFS_XATTR_ATTRIB "cifs.dosattrib"  /* full name: user.cifs.dosattrib */



/* BB need to add server (Samba e.g) support for security and trusted prefix */
@@ -144,6 +145,31 @@ static int cifs_xattr_set(const struct xattr_handler *handler, 
	return rc;

}



static int cifs_attrib_get(struct dentry *dentry,

			   struct inode *inode, void *value,

			   size_t size)

{

	ssize_t rc;

	__u32 *pattribute;



	rc = cifs_revalidate_dentry_attr(dentry);



	if (rc)

		return rc;



	if ((value == NULL) || (size == 0))

		return sizeof(__u32);

	else if (size < sizeof(__u32))

		return -ERANGE;



	/* return dos attributes as pseudo xattr */

	pattribute = (__u32 *)value;

	*pattribute = CIFS_I(inode)->cifsAttrs;



	return sizeof(__u32);

}





static int cifs_xattr_get(const struct xattr_handler *handler,

			  struct dentry *dentry, struct inode *inode,

			  const char *name, void *value, size_t size)
@@ -168,10 +194,16 @@ static int cifs_xattr_get(const struct xattr_handler *handler, 
		rc = -ENOMEM;

		goto out;

	}

	/* return dos attributes as pseudo xattr */



	/* return alt name if available as pseudo attr */

	switch (handler->flags) {

	case XATTR_USER:

		cifs_dbg(FYI, "%s:querying user xattr %s\n", __func__, name);

		if (strcmp(name, CIFS_XATTR_ATTRIB) == 0) {

			rc = cifs_attrib_get(dentry, inode, value, size);

			break;

		}



		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)

			goto out;