From e677bfe4d451f8271986a229270c6eecd1f62b3f Mon Sep 17 00:00:00 2001 From: Andy Adamson Date: Tue, 17 Jul 2007 04:04:42 -0700 Subject: knfsd: nfsd4: parse secinfo information in exports downcall We add a list of pseudoflavors to each export downcall, which will be used both as a list of security flavors allowed on that export, and (in the order given) as the list of pseudoflavors to return on secinfo calls. This patch parses the new downcall information and adds it to the export structure, but doesn't use it for anything yet. Signed-off-by: J. Bruce Fields Signed-off-by: Andy Adamson Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nfsd/export.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 54 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c index d4accdcb53a2..fbbbcc5a2fa3 100644 --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -33,6 +33,8 @@ #include #include #include +#include +#include #define NFSDDBG_FACILITY NFSDDBG_EXPORT @@ -452,8 +454,48 @@ out_free_all: return err; } +static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp) +{ + int listsize, err; + struct exp_flavor_info *f; + + err = get_int(mesg, &listsize); + if (err) + return err; + if (listsize < 0 || listsize > MAX_SECINFO_LIST) + return -EINVAL; + + for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) { + err = get_int(mesg, &f->pseudoflavor); + if (err) + return err; + /* + * Just a quick sanity check; we could also try to check + * whether this pseudoflavor is supported, but at worst + * an unsupported pseudoflavor on the export would just + * be a pseudoflavor that won't match the flavor of any + * authenticated request. The administrator will + * probably discover the problem when someone fails to + * authenticate. + */ + if (f->pseudoflavor < 0) + return -EINVAL; + err = get_int(mesg, &f->flags); + if (err) + return err; + /* Only some flags are allowed to differ between flavors: */ + if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags)) + return -EINVAL; + } + exp->ex_nflavors = listsize; + return 0; +} + #else /* CONFIG_NFSD_V4 */ -static inline int fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) { return 0; } +static inline int +fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;} +static inline int +secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; } #endif static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) @@ -477,6 +519,9 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) exp.ex_uuid = NULL; + /* secinfo */ + exp.ex_nflavors = 0; + if (mesg[mlen-1] != '\n') return -EINVAL; mesg[mlen-1] = 0; @@ -554,7 +599,9 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen) if (exp.ex_uuid == NULL) err = -ENOMEM; } - } else + } else if (strcmp(buf, "secinfo") == 0) + err = secinfo_parse(&mesg, buf, &exp); + else /* quietly ignore unknown words and anything * following. Newer user-space can try to set * new values, then see what the result was. @@ -655,6 +702,7 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem) { struct svc_export *new = container_of(cnew, struct svc_export, h); struct svc_export *item = container_of(citem, struct svc_export, h); + int i; new->ex_flags = item->ex_flags; new->ex_anon_uid = item->ex_anon_uid; @@ -670,6 +718,10 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem) item->ex_fslocs.locations_count = 0; new->ex_fslocs.migrated = item->ex_fslocs.migrated; item->ex_fslocs.migrated = 0; + new->ex_nflavors = item->ex_nflavors; + for (i = 0; i < MAX_SECINFO_LIST; i++) { + new->ex_flavors[i] = item->ex_flavors[i]; + } } static struct cache_head *svc_export_alloc(void) -- cgit v1.2.3