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-rw-r--r--net/9p/conv.c128
1 files changed, 127 insertions, 1 deletions
diff --git a/net/9p/conv.c b/net/9p/conv.c
index 3fe35d532c87..44547201f5bc 100644
--- a/net/9p/conv.c
+++ b/net/9p/conv.c
@@ -197,7 +197,7 @@ static void buf_get_qid(struct cbuf *bufp, struct p9_qid *qid)
197 197
198/** 198/**
199 * p9_size_wstat - calculate the size of a variable length stat struct 199 * p9_size_wstat - calculate the size of a variable length stat struct
200 * @stat: metadata (stat) structure 200 * @wstat: metadata (stat) structure
201 * @dotu: non-zero if 9P2000.u 201 * @dotu: non-zero if 9P2000.u
202 * 202 *
203 */ 203 */
@@ -511,6 +511,12 @@ p9_create_common(struct cbuf *bufp, u32 size, u8 id)
511 return fc; 511 return fc;
512} 512}
513 513
514/**
515 * p9_set_tag - set the tag field of an &p9_fcall structure
516 * @fc: fcall structure to set tag within
517 * @tag: tag id to set
518 */
519
514void p9_set_tag(struct p9_fcall *fc, u16 tag) 520void p9_set_tag(struct p9_fcall *fc, u16 tag)
515{ 521{
516 fc->tag = tag; 522 fc->tag = tag;
@@ -518,6 +524,12 @@ void p9_set_tag(struct p9_fcall *fc, u16 tag)
518} 524}
519EXPORT_SYMBOL(p9_set_tag); 525EXPORT_SYMBOL(p9_set_tag);
520 526
527/**
528 * p9_create_tversion - allocates and creates a T_VERSION request
529 * @msize: requested maximum data size
530 * @version: version string to negotiate
531 *
532 */
521struct p9_fcall *p9_create_tversion(u32 msize, char *version) 533struct p9_fcall *p9_create_tversion(u32 msize, char *version)
522{ 534{
523 int size; 535 int size;
@@ -542,6 +554,16 @@ error:
542} 554}
543EXPORT_SYMBOL(p9_create_tversion); 555EXPORT_SYMBOL(p9_create_tversion);
544 556
557/**
558 * p9_create_tauth - allocates and creates a T_AUTH request
559 * @afid: handle to use for authentication protocol
560 * @uname: user name attempting to authenticate
561 * @aname: mount specifier for remote server
562 * @n_uname: numeric id for user attempting to authneticate
563 * @dotu: 9P2000.u extension flag
564 *
565 */
566
545struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname, 567struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname,
546 u32 n_uname, int dotu) 568 u32 n_uname, int dotu)
547{ 569{
@@ -580,6 +602,18 @@ error:
580} 602}
581EXPORT_SYMBOL(p9_create_tauth); 603EXPORT_SYMBOL(p9_create_tauth);
582 604
605/**
606 * p9_create_tattach - allocates and creates a T_ATTACH request
607 * @fid: handle to use for the new mount point
608 * @afid: handle to use for authentication protocol
609 * @uname: user name attempting to attach
610 * @aname: mount specifier for remote server
611 * @n_uname: numeric id for user attempting to attach
612 * @n_uname: numeric id for user attempting to attach
613 * @dotu: 9P2000.u extension flag
614 *
615 */
616
583struct p9_fcall * 617struct p9_fcall *
584p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname, 618p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname,
585 u32 n_uname, int dotu) 619 u32 n_uname, int dotu)
@@ -616,6 +650,12 @@ error:
616} 650}
617EXPORT_SYMBOL(p9_create_tattach); 651EXPORT_SYMBOL(p9_create_tattach);
618 652
653/**
654 * p9_create_tflush - allocates and creates a T_FLUSH request
655 * @oldtag: tag id for the transaction we are attempting to cancel
656 *
657 */
658
619struct p9_fcall *p9_create_tflush(u16 oldtag) 659struct p9_fcall *p9_create_tflush(u16 oldtag)
620{ 660{
621 int size; 661 int size;
@@ -639,6 +679,15 @@ error:
639} 679}
640EXPORT_SYMBOL(p9_create_tflush); 680EXPORT_SYMBOL(p9_create_tflush);
641 681
682/**
683 * p9_create_twalk - allocates and creates a T_FLUSH request
684 * @fid: handle we are traversing from
685 * @newfid: a new handle for this transaction
686 * @nwname: number of path elements to traverse
687 * @wnames: array of path elements
688 *
689 */
690
642struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname, 691struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
643 char **wnames) 692 char **wnames)
644{ 693{
@@ -677,6 +726,13 @@ error:
677} 726}
678EXPORT_SYMBOL(p9_create_twalk); 727EXPORT_SYMBOL(p9_create_twalk);
679 728
729/**
730 * p9_create_topen - allocates and creates a T_OPEN request
731 * @fid: handle we are trying to open
732 * @mode: what mode we are trying to open the file in
733 *
734 */
735
680struct p9_fcall *p9_create_topen(u32 fid, u8 mode) 736struct p9_fcall *p9_create_topen(u32 fid, u8 mode)
681{ 737{
682 int size; 738 int size;
@@ -701,6 +757,19 @@ error:
701} 757}
702EXPORT_SYMBOL(p9_create_topen); 758EXPORT_SYMBOL(p9_create_topen);
703 759
760/**
761 * p9_create_tcreate - allocates and creates a T_CREATE request
762 * @fid: handle of directory we are trying to create in
763 * @name: name of the file we are trying to create
764 * @perm: permissions for the file we are trying to create
765 * @mode: what mode we are trying to open the file in
766 * @extension: 9p2000.u extension string (for special files)
767 * @dotu: 9p2000.u enabled flag
768 *
769 * Note: Plan 9 create semantics include opening the resulting file
770 * which is why mode is included.
771 */
772
704struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode, 773struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
705 char *extension, int dotu) 774 char *extension, int dotu)
706{ 775{
@@ -736,6 +805,13 @@ error:
736} 805}
737EXPORT_SYMBOL(p9_create_tcreate); 806EXPORT_SYMBOL(p9_create_tcreate);
738 807
808/**
809 * p9_create_tread - allocates and creates a T_READ request
810 * @fid: handle of the file we are trying to read
811 * @offset: offset to start reading from
812 * @count: how many bytes to read
813 */
814
739struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count) 815struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count)
740{ 816{
741 int size; 817 int size;
@@ -761,6 +837,17 @@ error:
761} 837}
762EXPORT_SYMBOL(p9_create_tread); 838EXPORT_SYMBOL(p9_create_tread);
763 839
840/**
841 * p9_create_twrite - allocates and creates a T_WRITE request from the kernel
842 * @fid: handle of the file we are trying to write
843 * @offset: offset to start writing at
844 * @count: how many bytes to write
845 * @data: data to write
846 *
847 * This function will create a requst with data buffers from the kernel
848 * such as the page cache.
849 */
850
764struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count, 851struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
765 const char *data) 852 const char *data)
766{ 853{
@@ -794,6 +881,16 @@ error:
794} 881}
795EXPORT_SYMBOL(p9_create_twrite); 882EXPORT_SYMBOL(p9_create_twrite);
796 883
884/**
885 * p9_create_twrite_u - allocates and creates a T_WRITE request from userspace
886 * @fid: handle of the file we are trying to write
887 * @offset: offset to start writing at
888 * @count: how many bytes to write
889 * @data: data to write
890 *
891 * This function will create a request with data buffers from userspace
892 */
893
797struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count, 894struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
798 const char __user *data) 895 const char __user *data)
799{ 896{
@@ -827,6 +924,14 @@ error:
827} 924}
828EXPORT_SYMBOL(p9_create_twrite_u); 925EXPORT_SYMBOL(p9_create_twrite_u);
829 926
927/**
928 * p9_create_tclunk - allocate a request to forget about a file handle
929 * @fid: handle of the file we closing or forgetting about
930 *
931 * clunk is used both to close open files and to discard transient handles
932 * which may be created during meta-data operations and hierarchy traversal.
933 */
934
830struct p9_fcall *p9_create_tclunk(u32 fid) 935struct p9_fcall *p9_create_tclunk(u32 fid)
831{ 936{
832 int size; 937 int size;
@@ -850,6 +955,12 @@ error:
850} 955}
851EXPORT_SYMBOL(p9_create_tclunk); 956EXPORT_SYMBOL(p9_create_tclunk);
852 957
958/**
959 * p9_create_tremove - allocate and create a request to remove a file
960 * @fid: handle of the file or directory we are removing
961 *
962 */
963
853struct p9_fcall *p9_create_tremove(u32 fid) 964struct p9_fcall *p9_create_tremove(u32 fid)
854{ 965{
855 int size; 966 int size;
@@ -873,6 +984,12 @@ error:
873} 984}
874EXPORT_SYMBOL(p9_create_tremove); 985EXPORT_SYMBOL(p9_create_tremove);
875 986
987/**
988 * p9_create_tstat - allocate and populate a request for attributes
989 * @fid: handle of the file or directory we are trying to get the attributes of
990 *
991 */
992
876struct p9_fcall *p9_create_tstat(u32 fid) 993struct p9_fcall *p9_create_tstat(u32 fid)
877{ 994{
878 int size; 995 int size;
@@ -896,6 +1013,14 @@ error:
896} 1013}
897EXPORT_SYMBOL(p9_create_tstat); 1014EXPORT_SYMBOL(p9_create_tstat);
898 1015
1016/**
1017 * p9_create_tstat - allocate and populate a request to change attributes
1018 * @fid: handle of the file or directory we are trying to change
1019 * @wstat: &p9_stat structure with attributes we wish to set
1020 * @dotu: 9p2000.u enabled flag
1021 *
1022 */
1023
899struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat, 1024struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
900 int dotu) 1025 int dotu)
901{ 1026{
@@ -922,3 +1047,4 @@ error:
922 return fc; 1047 return fc;
923} 1048}
924EXPORT_SYMBOL(p9_create_twstat); 1049EXPORT_SYMBOL(p9_create_twstat);
1050