diff options
| author | Neil Brown <neilb@cse.unsw.edu.au> | 2002-10-11 05:39:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.transmeta.com> | 2002-10-11 05:39:46 -0700 |
| commit | 85d183651e2ddd580e8d688879826744467883dd (patch) | |
| tree | 3ffa3c7c10b70e252a4c45eddd55cdfd7255b8c7 /include/linux | |
| parent | df821d2c2d61521b0f8805b7972ed2ff9af8add4 (diff) | |
[PATCH] kNFSd: Convert export-table to use new cache code
This introduces two caches, svc_export_cache (nfsd.exports) and
svc_expkey_cache (nfsd.fh).
nfsd.exports maps client+directory -> export options.
nfsd.fh maps client + filehandle-fragment -> directory.
A major part of this change is that export entries are now reference counted,
so we have to be careful to keep those counts correct.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/nfsd/export.h | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/include/linux/nfsd/export.h b/include/linux/nfsd/export.h index 9c2802c121c4..8e658be46c87 100644 --- a/include/linux/nfsd/export.h +++ b/include/linux/nfsd/export.h @@ -46,7 +46,7 @@ #ifdef __KERNEL__ struct svc_export { - struct list_head ex_hash; + struct cache_head h; struct auth_domain * ex_client; int ex_flags; struct vfsmount * ex_mnt; @@ -61,7 +61,7 @@ struct svc_export { * for type 0 (dev/ino), one for type 1 (fsid) */ struct svc_expkey { - struct list_head ek_hash; + struct cache_head h; struct auth_domain * ek_client; int ek_fsidtype; @@ -98,14 +98,30 @@ int exp_rootfh(struct auth_domain *, int exp_pseudoroot(struct auth_domain *, struct svc_fh *fhp); int nfserrno(int errno); +extern void expkey_put(struct cache_head *item, struct cache_detail *cd); +extern void svc_export_put(struct cache_head *item, struct cache_detail *cd); +extern struct cache_detail svc_export_cache, svc_expkey_cache; + +static inline void exp_put(struct svc_export *exp) +{ + svc_export_put(&exp->h, &svc_export_cache); +} + static inline struct svc_export * exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv) { struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv); - if (ek) - return ek->ek_export; - else - return NULL; + if (ek && !IS_ERR(ek)) { + struct svc_export *exp = ek->ek_export; + int err; + cache_get(&exp->h); + expkey_put(&ek->h, &svc_expkey_cache); + if (exp && + (err = cache_check(&svc_export_cache, &exp->h))) + exp = ERR_PTR(err); + return exp; + } else + return ERR_PTR(PTR_ERR(ek)); } #endif /* __KERNEL__ */ |