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authorAnand Avati <avati@redhat.com>2013-05-02 20:01:18 -0700
committerVijay Bellur <vbellur@redhat.com>2013-06-08 14:53:48 -0700
commite25cf30a74941b4dc76b6d26b602afec2c1e2c6e (patch)
treef1e096b494106744e94ebd12620c363d2aa426a3 /api/src
parentd660b5fe4402d8942dfe6d3e5cecba9c1e0c297f (diff)
gfapi: add new API glfs_dup() to copy a file descriptor
Duplicate a glfs_fd file descriptor. Inherit the internal fd_t with a reference. Change-Id: Ib30e9a46b608b9f78202957f4dab6ba6265a9ec0 BUG: 953694 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/5170 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'api/src')
-rw-r--r--api/src/glfs-fops.c42
-rw-r--r--api/src/glfs.h1
2 files changed, 43 insertions, 0 deletions
diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c
index 231db481b8e..66e7d69f14d 100644
--- a/api/src/glfs-fops.c
+++ b/api/src/glfs-fops.c
@@ -2882,3 +2882,45 @@ out:
return ret;
}
+
+
+struct glfs_fd *
+glfs_dup (struct glfs_fd *glfd)
+{
+ xlator_t *subvol = NULL;
+ fd_t *fd = NULL;
+ glfs_fd_t *dupfd = NULL;
+ struct glfs *fs = NULL;
+
+ __glfs_entry_fd (glfd);
+
+ fs = glfd->fs;
+ subvol = glfs_active_subvol (fs);
+ if (!subvol) {
+ errno = EIO;
+ goto out;
+ }
+
+ fd = glfs_resolve_fd (fs, subvol, glfd);
+ if (!fd) {
+ errno = EBADFD;
+ goto out;
+ }
+
+ dupfd = glfs_fd_new (fs);
+ if (!dupfd) {
+ errno = ENOMEM;
+ goto out;
+ }
+
+ dupfd->fd = fd_ref (fd);
+out:
+ if (fd)
+ fd_unref (fd);
+ if (dupfd)
+ glfs_fd_bind (dupfd);
+
+ glfs_subvol_done (fs, subvol);
+
+ return dupfd;
+}
diff --git a/api/src/glfs.h b/api/src/glfs.h
index aeabfdf0b4f..f472ca4ea1e 100644
--- a/api/src/glfs.h
+++ b/api/src/glfs.h
@@ -461,6 +461,7 @@ char *glfs_realpath (glfs_t *fs, const char *path, char *resolved_path);
*/
int glfs_posix_lock (glfs_fd_t *fd, int cmd, struct flock *flock);
+glfs_fd_t *glfs_dup (glfs_fd_t *fd);
__END_DECLS