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

Commit 7b7f2bdf authored by Long Li's avatar Long Li Committed by Steve French
Browse files

CIFS: Introduce helper function to get page offset and length in smb_rqst



Introduce a function rqst_page_get_length to return the page offset and
length for a given page in smb_rqst. This function is to be used by
following patches.

Signed-off-by: default avatarLong Li <longli@microsoft.com>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent c06a0f2d
Loading
Loading
Loading
Loading
+3 −0
Original line number Diff line number Diff line
@@ -557,4 +557,7 @@ int cifs_alloc_hash(const char *name, struct crypto_shash **shash,
		    struct sdesc **sdesc);
void cifs_free_hash(struct crypto_shash **shash, struct sdesc **sdesc);

extern void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
				unsigned int *len, unsigned int *offset);

#endif			/* _CIFSPROTO_H */
+17 −0
Original line number Diff line number Diff line
@@ -905,3 +905,20 @@ cifs_free_hash(struct crypto_shash **shash, struct sdesc **sdesc)
		crypto_free_shash(*shash);
	*shash = NULL;
}

/**
 * rqst_page_get_length - obtain the length and offset for a page in smb_rqst
 * Input: rqst - a smb_rqst, page - a page index for rqst
 * Output: *len - the length for this page, *offset - the offset for this page
 */
void rqst_page_get_length(struct smb_rqst *rqst, unsigned int page,
				unsigned int *len, unsigned int *offset)
{
	*len = rqst->rq_pagesz;
	*offset = (page == 0) ? rqst->rq_offset : 0;

	if (rqst->rq_npages == 1 || page == rqst->rq_npages-1)
		*len = rqst->rq_tailsz;
	else if (page == 0)
		*len = rqst->rq_pagesz - rqst->rq_offset;
}