[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/lockd/svcshare.c b/ap/os/linux/linux-3.4.x/fs/lockd/svcshare.c
new file mode 100644
index 0000000..b0ae070
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/lockd/svcshare.c
@@ -0,0 +1,106 @@
+/*
+ * linux/fs/lockd/svcshare.c
+ *
+ * Management of DOS shares.
+ *
+ * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#include <linux/time.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/lockd/lockd.h>
+#include <linux/lockd/share.h>
+
+static inline int
+nlm_cmp_owner(struct nlm_share *share, struct xdr_netobj *oh)
+{
+ return share->s_owner.len == oh->len
+ && !memcmp(share->s_owner.data, oh->data, oh->len);
+}
+
+__be32
+nlmsvc_share_file(struct nlm_host *host, struct nlm_file *file,
+ struct nlm_args *argp)
+{
+ struct nlm_share *share;
+ struct xdr_netobj *oh = &argp->lock.oh;
+ u8 *ohdata;
+
+ for (share = file->f_shares; share; share = share->s_next) {
+ if (share->s_host == host && nlm_cmp_owner(share, oh))
+ goto update;
+ if ((argp->fsm_access & share->s_mode)
+ || (argp->fsm_mode & share->s_access ))
+ return nlm_lck_denied;
+ }
+
+ share = kmalloc(sizeof(*share) + oh->len,
+ GFP_KERNEL);
+ if (share == NULL)
+ return nlm_lck_denied_nolocks;
+
+ /* Copy owner handle */
+ ohdata = (u8 *) (share + 1);
+ memcpy(ohdata, oh->data, oh->len);
+
+ share->s_file = file;
+ share->s_host = host;
+ share->s_owner.data = ohdata;
+ share->s_owner.len = oh->len;
+ share->s_next = file->f_shares;
+ file->f_shares = share;
+
+update:
+ share->s_access = argp->fsm_access;
+ share->s_mode = argp->fsm_mode;
+ return nlm_granted;
+}
+
+/*
+ * Delete a share.
+ */
+__be32
+nlmsvc_unshare_file(struct nlm_host *host, struct nlm_file *file,
+ struct nlm_args *argp)
+{
+ struct nlm_share *share, **shpp;
+ struct xdr_netobj *oh = &argp->lock.oh;
+
+ for (shpp = &file->f_shares; (share = *shpp) != NULL;
+ shpp = &share->s_next) {
+ if (share->s_host == host && nlm_cmp_owner(share, oh)) {
+ *shpp = share->s_next;
+ kfree(share);
+ return nlm_granted;
+ }
+ }
+
+ /* X/Open spec says return success even if there was no
+ * corresponding share. */
+ return nlm_granted;
+}
+
+/*
+ * Traverse all shares for a given file, and delete
+ * those owned by the given (type of) host
+ */
+void nlmsvc_traverse_shares(struct nlm_host *host, struct nlm_file *file,
+ nlm_host_match_fn_t match)
+{
+ struct nlm_share *share, **shpp;
+
+ shpp = &file->f_shares;
+ while ((share = *shpp) != NULL) {
+ if (match(share->s_host, host)) {
+ *shpp = share->s_next;
+ kfree(share);
+ continue;
+ }
+ shpp = &share->s_next;
+ }
+}