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[PATCH] knfsd: nfsd4: clarify units of COMPOUND_SLACK_SPACE

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A comment here incorrectly states that "slack_space" is measured in words, not
bytes.  Remove the comment, and adjust a variable name and a few comments to
clarify the situation.

This is pure cleanup; there should be no change in functionality.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
J.Bruce Fields 2006-12-13 00:35:20 -08:00 committed by Linus Torvalds
parent b797b5beac
commit e571019911
2 changed files with 7 additions and 7 deletions
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10
fs/nfsd/nfs4proc.c
View file

@ -740,7 +740,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
struct svc_fh *current_fh = NULL;
struct svc_fh *save_fh = NULL;
struct nfs4_stateowner *replay_owner = NULL;
int slack_space; /* in words, not bytes! */
int slack_bytes;
__be32 status;
status = nfserr_resource;
@ -790,10 +790,10 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
* failed response to the next operation. If we don't
* have enough room, fail with ERR_RESOURCE.
*/
/* FIXME - is slack_space *really* words, or bytes??? - neilb */
slack_space = (char *)resp->end - (char *)resp->p;
if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
slack_bytes = (char *)resp->end - (char *)resp->p;
if (slack_bytes < COMPOUND_SLACK_SPACE
+ COMPOUND_ERR_SLACK_SPACE) {
BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
op->status = nfserr_resource;
goto encode_op;
}

4
include/linux/nfsd/nfsd.h
View file

@ -275,12 +275,12 @@ static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh)
* we might process an operation with side effects, and be unable to
* tell the client that the operation succeeded.
*
* COMPOUND_SLACK_SPACE - this is the minimum amount of buffer space
* COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
* needed to encode an "ordinary" _successful_ operation. (GETATTR,
* READ, READDIR, and READLINK have their own buffer checks.) if we
* fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
*
* COMPOUND_ERR_SLACK_SPACE - this is the minimum amount of buffer space
* COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
* needed to encode an operation which has failed with NFS4ERR_RESOURCE.
* care is taken to ensure that we never fall below this level for any
* reason.