From 1bcb1c4d5225e197464d1c64bafd4e7ef4042e78 Mon Sep 17 00:00:00 2001
From: Anand Avati <avati@redhat.com>
Date: Mon, 15 Apr 2013 09:52:35 -0700
Subject: gfapi: POSIX locking support

Change-Id: I37d9e1fb4a715094876be6af3856c1b4cf398021
BUG: 953694
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4881
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
---
 api/src/glfs-fops.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 api/src/glfs.c      |  1 +
 api/src/glfs.h      |  6 ++++++
 3 files changed, 53 insertions(+)

(limited to 'api')

diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c
index 3ce930f2..61c524ea 100644
--- a/api/src/glfs-fops.c
+++ b/api/src/glfs-fops.c
@@ -2315,3 +2315,49 @@ out:
 
 	return buf;
 }
+
+
+static void
+gf_flock_to_flock (struct gf_flock *gf_flock, struct flock *flock)
+{
+	flock->l_type   = gf_flock->l_type;
+	flock->l_whence = gf_flock->l_whence;
+	flock->l_start  = gf_flock->l_start;
+	flock->l_len    = gf_flock->l_len;
+	flock->l_pid    = gf_flock->l_pid;
+}
+
+
+static void
+gf_flock_from_flock (struct gf_flock *gf_flock, struct flock *flock)
+{
+	gf_flock->l_type   = flock->l_type;
+	gf_flock->l_whence = flock->l_whence;
+	gf_flock->l_start  = flock->l_start;
+	gf_flock->l_len    = flock->l_len;
+	gf_flock->l_pid    = flock->l_pid;
+}
+
+
+int
+glfs_posix_lock (struct glfs_fd *glfd, int cmd, struct flock *flock)
+{
+	int              ret = -1;
+	xlator_t        *subvol = NULL;
+	struct gf_flock  gf_flock = {0, };
+
+	__glfs_entry_fd (glfd);
+
+	subvol = glfs_fd_subvol (glfd);
+	if (!subvol) {
+		ret = -1;
+		errno = EIO;
+		goto out;
+	}
+
+	gf_flock_from_flock (&gf_flock, flock);
+	ret = syncop_lk (subvol, glfd->fd, cmd, &gf_flock);
+	gf_flock_to_flock (&gf_flock, flock);
+out:
+	return ret;
+}
diff --git a/api/src/glfs.c b/api/src/glfs.c
index 21cded39..01c3494e 100644
--- a/api/src/glfs.c
+++ b/api/src/glfs.c
@@ -11,6 +11,7 @@
 
 /*
   TODO:
+  - merge locks in glfs_posix_lock for lock self-healing
   - refresh fs->cwd inode on graph switch
   - set proper pid/lk_owner to call frames (currently buried in syncop)
   - fix logging.c/h to store logfp and loglevel in glusterfs_ctx_t and
diff --git a/api/src/glfs.h b/api/src/glfs.h
index 06849d0c..7fecffb6 100644
--- a/api/src/glfs.h
+++ b/api/src/glfs.h
@@ -453,6 +453,12 @@ int glfs_fchdir (glfs_fd_t *fd);
 
 char *glfs_realpath (glfs_t *fs, const char *path, char *resolved_path);
 
+/*
+ * @cmd and @flock are as specified in man fcntl(2).
+ */
+int glfs_posix_lock (glfs_fd_t *fd, int cmd, struct flock *flock);
+
+
 __END_DECLS
 
 #endif /* !_GLFS_H */
-- 
cgit