The syscall interface is has been replaced by a more flexible
interface since 2.6.0. It is time to work towards discarding
the old interface.
So add a entry in feature-removal-schedule.txt and print a warning
when the interface is used.
Signed-off-by: NeilBrown <neilb@xxxxxxx>
---
Documentation/feature-removal-schedule.txt | 10 ++++++++++
fs/nfsd/nfsctl.c | 10 ++++++++++
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 842aa9d..076a2c0 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -564,3 +564,13 @@ Who: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
----------------------------
+What: access to nfsd auth cache through sys_nfsservctl or '.' files
+ in the 'nfsd' filesystem.
+When: 2.6.40
+Why: This is a legacy interface which have been replaced by a more
+ dynamic cache. Continuing to maintain this interface is an
+ unnecessary burden.
+Who: NeilBrown <neilb@xxxxxxx>
+
+----------------------------
+
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index b53b1d0..7f0fc88 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -121,6 +121,16 @@ static ssize_t nfsctl_transaction_write(struct file *file, const char __user *bu
static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
{
+ static int warned;
+ if (file->f_dentry->d_name.name[0] == '.' && !warned) {
+ char name[sizeof(current->comm)];
+ printk(KERN_INFO
+ "Warning: \"%s\" uses deprecated NFSD interface: %s."
+ " This will be removed in 2.6.40\n",
+ get_task_comm(name, current),
+ file->f_dentry->d_name.name);
+ warned = 1;
+ }
if (! file->private_data) {
/* An attempt to read a transaction file without writing
* causes a 0-byte write so that the file can return
--
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