From: Andy Adamson <andros@xxxxxxxxxx>
Change nfsd filesystem name from pnfs_ds_list to pnfs_dlm_device
write the per block device dlm data server cache
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
Acked-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxxxxxx>
---
fs/nfsd/nfsctl.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 73 insertions(+)
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index b8bfa2e..7da8584 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -50,6 +50,9 @@ enum {
NFSD_Gracetime,
NFSD_RecoveryDir,
#endif
+#ifdef CONFIG_PNFSD
+ NFSD_pnfs_dlm_device,
+#endif
};
/*
@@ -68,6 +71,9 @@ enum {
static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
#endif
+#ifdef CONFIG_PNFSD
+static ssize_t write_pnfs_dlm_device(struct file *file, char *buf, size_t size);
+#endif
static ssize_t (*write_op[])(struct file *, char *, size_t) = {
[NFSD_Fh] = write_filehandle,
@@ -83,6 +89,9 @@ static ssize_t (*write_op[])(struct file *, char *, size_t) = {
[NFSD_Gracetime] = write_gracetime,
[NFSD_RecoveryDir] = write_recoverydir,
#endif
+#ifdef CONFIG_PNFSD
+ [NFSD_pnfs_dlm_device] = write_pnfs_dlm_device,
+#endif
};
static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
@@ -1037,6 +1046,66 @@ static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
#endif
+#ifdef CONFIG_PNFSD
+
+static ssize_t __write_pnfs_dlm_device(struct file *file, char *buf,
+ size_t size)
+{
+ char *mesg = buf;
+ char *pnfs_dlm_device;
+ int max_size = NFSD_PNFS_DLM_DEVICE_MAX;
+ int len, ret = 0;
+
+ if (size > 0) {
+ ret = -EINVAL;
+ if (size > max_size || buf[size-1] != '\n')
+ return ret;
+ buf[size-1] = 0;
+
+ pnfs_dlm_device = mesg;
+ len = qword_get(&mesg, pnfs_dlm_device, size);
+ if (len <= 0)
+ return ret;
+
+ ret = nfsd4_set_pnfs_dlm_device(pnfs_dlm_device, len);
+ }
+ return ret <= 0 ? ret : strlen(buf);
+}
+
+/**
+ * write_pnfs_dlm_device - Set or report the current pNFS data server list
+ *
+ * Input:
+ * buf: ignored
+ * size: zero
+ *
+ * OR
+ *
+ * Input:
+ * buf: C string containing a block device name,
+ * a colon, and then a comma separated
+ * list of pNFS data server IPv4 addresses
+ * size: non-zero length of C string in @buf
+ * Output:
+ * On success: passed-in buffer filled with '\n'-terminated C
+ * string containing a block device name, a colon, and
+ * then a comma separated list of pNFS
+ * data server IPv4 addresses.
+ * return code is the size in bytes of the string
+ * On error: return code is a negative errno value
+ */
+static ssize_t write_pnfs_dlm_device(struct file *file, char *buf, size_t size)
+{
+ ssize_t rv;
+
+ mutex_lock(&nfsd_mutex);
+ rv = __write_pnfs_dlm_device(file, buf, size);
+ mutex_unlock(&nfsd_mutex);
+ return rv;
+}
+
+#endif /* CONFIG_PNFSD */
+
/*----------------------------------------------------------------------------*/
/*
* populating the filesystem.
@@ -1068,6 +1137,10 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
[NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
#endif
+#ifdef CONFIG_PNFSD
+ [NFSD_pnfs_dlm_device] = {"pnfs_dlm_device", &transaction_ops,
+ S_IWUSR|S_IRUSR},
+#endif
/* last one */ {""}
};
struct net *net = data;
--
1.8.3.1
--
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