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authorNeilBrown <neilb@suse.de>2006-10-06 03:44:05 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-06 11:53:41 -0400
commitc6b0a9f87b82f25fa35206ec04b5160372eabab4 (patch)
tree849ed55115c95a86a3d164d674c178f9504750a5 /fs/nfsd/nfssvc.c
parent5842730de179405d80649231faa0b3f254477434 (diff)
[PATCH] knfsd: tidy up up meaning of 'buffer size' in nfsd/sunrpc
There is some confusion about the meaning of 'bufsz' for a sunrpc server. In some cases it is the largest message that can be sent or received. In other cases it is the largest 'payload' that can be included in a NFS message. In either case, it is not possible for both the request and the reply to be this large. One of the request or reply may only be one page long, which fits nicely with NFS. So we remove 'bufsz' and replace it with two numbers: 'max_payload' and 'max_mesg'. Max_payload is the size that the server requests. It is used by the server to check the max size allowed on a particular connection: depending on the protocol a lower limit might be used. max_mesg is the largest single message that can be sent or received. It is calculated as the max_payload, rounded up to a multiple of PAGE_SIZE, and with PAGE_SIZE added to overhead. Only one of the request and reply may be this size. The other must be at most one page. Cc: Greg Banks <gnb@sgi.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/nfsd/nfssvc.c')
-rw-r--r--fs/nfsd/nfssvc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 6fa6340a5fb8..013b38996e64 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -217,7 +217,7 @@ int nfsd_create_serv(void)
217 217
218 atomic_set(&nfsd_busy, 0); 218 atomic_set(&nfsd_busy, 0);
219 nfsd_serv = svc_create_pooled(&nfsd_program, 219 nfsd_serv = svc_create_pooled(&nfsd_program,
220 NFSD_BUFSIZE - NFSSVC_MAXBLKSIZE + nfsd_max_blksize, 220 nfsd_max_blksize,
221 nfsd_last_thread, 221 nfsd_last_thread,
222 nfsd, SIG_NOCLEAN, THIS_MODULE); 222 nfsd, SIG_NOCLEAN, THIS_MODULE);
223 if (nfsd_serv == NULL) 223 if (nfsd_serv == NULL)