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Commit dbf847ec authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

knfsd: allow cache_register to return error on failure 



Newer server features such as nfsv4 and gss depend on proc to work, so a
failure to initialize the proc files they need should be treated as
fatal.

Thanks to Andrew Morton for style fix and compile fix in case where
CONFIG_NFSD_V4 is undefined.

Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: default avatarNeilBrown <neilb@suse.de>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent ffe9386b

fs/nfsd/export.c

+9 −3
Original line number Diff line number Diff line
@@ -1637,13 +1637,19 @@ exp_verify_string(char *cp, int max) 
/*

 * Initialize the exports module.

 */

void

int

nfsd_export_init(void)

{

	int rv;

	dprintk("nfsd: initializing export module.\n");



	cache_register(&svc_export_cache);

	cache_register(&svc_expkey_cache);

	rv = cache_register(&svc_export_cache);

	if (rv)

		return rv;

	rv = cache_register(&svc_expkey_cache);

	if (rv)

		cache_unregister(&svc_export_cache);

	return rv;



}

fs/nfsd/nfs4idmap.c

+10 −3
Original line number Diff line number Diff line
@@ -464,11 +464,18 @@ nametoid_update(struct ent *new, struct ent *old) 
 * Exported API

 */



void

int

nfsd_idmap_init(void)

{

	cache_register(&idtoname_cache);

	cache_register(&nametoid_cache);

	int rv;



	rv = cache_register(&idtoname_cache);

	if (rv)

		return rv;

	rv = cache_register(&nametoid_cache);

	if (rv)

		cache_unregister(&idtoname_cache);

	return rv;

}



void

fs/nfsd/nfsctl.c

+9 −3
Original line number Diff line number Diff line
@@ -707,9 +707,13 @@ static int __init init_nfsd(void) 
	retval = nfsd_reply_cache_init();

	if (retval)

		goto out_free_stat;

	nfsd_export_init();	/* Exports table */

	retval = nfsd_export_init();

	if (retval)

		goto out_free_cache;

	nfsd_lockd_init();	/* lockd->nfsd callbacks */

	nfsd_idmap_init();      /* Name to ID mapping */

	retval = nfsd_idmap_init();

	if (retval)

		goto out_free_lockd;

	retval = create_proc_exports_entry();

	if (retval)

		goto out_free_idmap;
@@ -720,10 +724,12 @@ static int __init init_nfsd(void) 
out_free_all:

	remove_proc_entry("fs/nfs/exports", NULL);

	remove_proc_entry("fs/nfs", NULL);

	nfsd_idmap_shutdown();

out_free_idmap:

	nfsd_idmap_shutdown();

out_free_lockd:

	nfsd_lockd_shutdown();

	nfsd_export_shutdown();

out_free_cache:

	nfsd_reply_cache_shutdown();

out_free_stat:

	nfsd_stat_shutdown();

include/linux/nfsd/export.h

+1 −1
Original line number Diff line number Diff line
@@ -122,7 +122,7 @@ __be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp); 
/*

 * Function declarations

 */

void			nfsd_export_init(void);

int			nfsd_export_init(void);

void			nfsd_export_shutdown(void);

void			nfsd_export_flush(void);

void			exp_readlock(void);

include/linux/nfsd_idmap.h

+8 −3
Original line number Diff line number Diff line
@@ -44,11 +44,16 @@ 
#define IDMAP_NAMESZ 128



#ifdef CONFIG_NFSD_V4

void nfsd_idmap_init(void);

int nfsd_idmap_init(void);

void nfsd_idmap_shutdown(void);

#else

static inline void nfsd_idmap_init(void) {};

static inline void nfsd_idmap_shutdown(void) {};

static inline int nfsd_idmap_init(void)

{

	return 0;

}

static inline void nfsd_idmap_shutdown(void)

{

}

#endif



int nfsd_map_name_to_uid(struct svc_rqst *, const char *, size_t, __u32 *);