Commit 7775f4c8 authored by NeilBrown's avatar NeilBrown Committed by Linus Torvalds
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[PATCH] knfsd: Correct reserved reply space for read requests.



NFSd makes sure there is enough space to hold the maximum possible reply
before accepting a request.  The units for this maximum is (4byte) words.
However in three places, particularly for read request, the number given is
a number of bytes.

This means too much space is reserved which is slightly wasteful.

This is the sort of patch that could uncover a deeper bug, and it is not
critical, so it would be best for it to spend a while in -mm before going
in to mainline.

(akpm: target 2.6.17-rc2, 2.6.16.3 (approx))
Discovered-by: default avatar"Eivind  Sarto" <ivan@kasenna.com>
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent df2487cf
......@@ -682,7 +682,7 @@ static struct svc_procedure nfsd_procedures3[22] = {
PROC(lookup, dirop, dirop, fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
PROC(access, access, access, fhandle, RC_NOCACHE, ST+pAT+1),
PROC(readlink, readlink, readlink, fhandle, RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
PROC(read, read, read, fhandle, RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE),
PROC(read, read, read, fhandle, RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE/4),
PROC(write, write, write, fhandle, RC_REPLBUFF, ST+WC+4),
PROC(create, create, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
PROC(mkdir, mkdir, create, fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
......
......@@ -975,7 +975,7 @@ struct nfsd4_voidargs { int dummy; };
*/
static struct svc_procedure nfsd_procedures4[2] = {
PROC(null, void, void, void, RC_NOCACHE, 1),
PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE)
PROC(compound, compound, compound, compound, RC_NOCACHE, NFSD_BUFSIZE/4)
};
struct svc_version nfsd_version4 = {
......
......@@ -553,7 +553,7 @@ static struct svc_procedure nfsd_procedures2[18] = {
PROC(none, void, void, none, RC_NOCACHE, ST),
PROC(lookup, diropargs, diropres, fhandle, RC_NOCACHE, ST+FH+AT),
PROC(readlink, readlinkargs, readlinkres, none, RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
PROC(read, readargs, readres, fhandle, RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE),
PROC(read, readargs, readres, fhandle, RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE/4),
PROC(none, void, void, none, RC_NOCACHE, ST),
PROC(write, writeargs, attrstat, fhandle, RC_REPLBUFF, ST+AT),
PROC(create, createargs, diropres, fhandle, RC_REPLBUFF, ST+FH+AT),
......
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