nfsd: pass svc_export_cache pointer as private data to "exports" seq file ops

Global svc_export_cache cache is going to be replaced with per-net instance. So
prepare the ground for it.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 11 insertions, 7 deletions

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index c20a405b5862..149532023778 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1029,13 +1029,14 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
 /* Iterator */
 
 static void *e_start(struct seq_file *m, loff_t *pos)
-        __acquires(svc_export_cache.hash_lock)
+        __acquires(((struct cache_detail *)m->private)->hash_lock)
 {
         loff_t n = *pos;
         unsigned hash, export;
         struct cache_head *ch;
-        
-        read_lock(&svc_export_cache.hash_lock);
+        struct cache_detail *cd = m->private;
+
+        read_lock(&cd->hash_lock);
         if (!n--)
                 return SEQ_START_TOKEN;
         hash = n >> 32;
@@ -1082,9 +1083,11 @@ static void *e_next(struct seq_file *m, void *p, loff_t *pos)
 }
 
 static void e_stop(struct seq_file *m, void *p)
-        __releases(svc_export_cache.hash_lock)
+        __releases(((struct cache_detail *)m->private)->hash_lock)
 {
-        read_unlock(&svc_export_cache.hash_lock);
+        struct cache_detail *cd = m->private;
+
+        read_unlock(&cd->hash_lock);
 }
 
 static struct flags {
@@ -1195,6 +1198,7 @@ static int e_show(struct seq_file *m, void *p)
 {
         struct cache_head *cp = p;
         struct svc_export *exp = container_of(cp, struct svc_export, h);
+        struct cache_detail *cd = m->private;
 
         if (p == SEQ_START_TOKEN) {
                 seq_puts(m, "# Version 1.1\n");
@@ -1203,10 +1207,10 @@ static int e_show(struct seq_file *m, void *p)
         }
 
         cache_get(&exp->h);
-        if (cache_check(&svc_export_cache, &exp->h, NULL))
+        if (cache_check(cd, &exp->h, NULL))
                 return 0;
         exp_put(exp);
-        return svc_export_show(m, &svc_export_cache, cp);
+        return svc_export_show(m, cd, cp);
 }
 
 const struct seq_operations nfs_exports_op = {