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nfsd: start documenting some XDR handling functions 

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Christoph Hellwig 2013-11-20 00:24:11 -08:00 committed by J. Bruce Fields
parent 6e14b46b91
commit 2d8498dbf8
1 changed files with 19 additions and 0 deletions
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19
fs/nfsd/nfs4xdr.c
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@ -190,6 +190,15 @@ static int zero_clientid(clientid_t *clid)
return (clid->cl_boot == 0) && (clid->cl_id == 0); return (clid->cl_boot == 0) && (clid->cl_id == 0);
} }
/**
* defer_free - mark an allocation as deferred freed
* @argp: NFSv4 compound argument structure to be freed with
* @release: release callback to free @p, typically kfree()
* @p: pointer to be freed
*
* Marks @p to be freed when processing the compound operation
* described in @argp finishes.
*/
static int static int
defer_free(struct nfsd4_compoundargs *argp, defer_free(struct nfsd4_compoundargs *argp,
void (*release)(const void *), void *p) void (*release)(const void *), void *p)
@ -206,6 +215,16 @@ defer_free(struct nfsd4_compoundargs *argp,
return 0; return 0;
} }
/**
* savemem - duplicate a chunk of memory for later processing
* @argp: NFSv4 compound argument structure to be freed with
* @p: pointer to be duplicated
* @nbytes: length to be duplicated
*
* Returns a pointer to a copy of @nbytes bytes of memory at @p
* that are preserved until processing of the NFSv4 compound
* operation described by @argp finishes.
*/
static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
{ {
if (p == argp->tmp) { if (p == argp->tmp) {