| [PATCH 5/8] nfsd: pass svc_export_cache pointer as private data to "exports" seq f [message #45679 is a reply to message #45674] |
Wed, 28 March 2012 15:09   |
Stanislav Kinsbursky
Messages: 683
Registered: October 2011
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Senior Member |
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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: Stanislav Kinsbursky <skinsbursky@parallels.com>
---
fs/nfsd/export.c | 18 +++++++++++-------
fs/nfsd/nfsctl.c | 11 ++++++++++-
2 files changed, 21 insertions(+), 8 deletions(-)
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index c20a405..1495320 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 = {
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index dee6c1b..9bc6f8c 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -127,7 +127,16 @@ static const struct file_operations transaction_ops = {
static int exports_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &nfs_exports_op);
+ int err;
+ struct seq_file *seq;
+
+ err = seq_open(file, &nfs_exports_op);
+ if (err)
+ return err;
+
+ seq = file->private_data;
+ seq->private = &svc_export_cache;
+ return 0;
}
static const struct file_operations exports_operations = {
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