diff options
author | Brian Foster <bfoster@redhat.com> | 2013-05-23 12:19:42 -0400 |
---|---|---|
committer | Anand Avati <avati@redhat.com> | 2013-06-13 14:37:43 -0700 |
commit | 17f287172413dc04244781aa5302a0e4f10e2777 (patch) | |
tree | 2acfc7097c92de32b19e82140befd8dc9fb2dad2 /api/src | |
parent | d1ccc4e400728d90f2ef7904661f53deb7199123 (diff) |
glusterfs: discard (hole punch) support
Add support for the DISCARD file operation. Discard punches a hole
in a file in the provided range. Block de-allocation is implemented
via fallocate() (as requested via fuse and passed on to the brick
fs) but a separate fop is created within gluster to emphasize the
fact that discard changes file data (the discarded region is
replaced with zeroes) and must invalidate caches where appropriate.
BUG: 963678
Change-Id: I34633a0bfff2187afeab4292a15f3cc9adf261af
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-on: http://review.gluster.org/5090
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'api/src')
-rw-r--r-- | api/src/glfs-fops.c | 34 | ||||
-rw-r--r-- | api/src/glfs.h | 2 |
2 files changed, 36 insertions, 0 deletions
diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c index 4bc0bb1b6d3..fbc9f4b49e4 100644 --- a/api/src/glfs-fops.c +++ b/api/src/glfs-fops.c @@ -2666,6 +2666,40 @@ out: int +glfs_discard (struct glfs_fd *glfd, off_t offset, size_t len) +{ + int ret = -1; + xlator_t *subvol = NULL; + fd_t *fd = NULL; + + __glfs_entry_fd (glfd); + + subvol = glfs_active_subvol (glfd->fs); + if (!subvol) { + ret = -1; + errno = EIO; + goto out; + } + + fd = glfs_resolve_fd (glfd->fs, subvol, glfd); + if (!fd) { + ret = -1; + errno = EBADFD; + goto out; + } + + ret = syncop_discard (subvol, fd, offset, len); +out: + if (fd) + fd_unref(fd); + + glfs_subvol_done (glfd->fs, subvol); + + return ret; +} + + +int glfs_chdir (struct glfs *fs, const char *path) { int ret = -1; diff --git a/api/src/glfs.h b/api/src/glfs.h index 3888a103eb9..700e10f17c9 100644 --- a/api/src/glfs.h +++ b/api/src/glfs.h @@ -450,6 +450,8 @@ int glfs_fremovexattr (glfs_fd_t *fd, const char *name); int glfs_fallocate(glfs_fd_t *fd, int keep_size, off_t offset, size_t len); +int glfs_discard(glfs_fd_t *fd, off_t offset, size_t len); + char *glfs_getcwd (glfs_t *fs, char *buf, size_t size); int glfs_chdir (glfs_t *fs, const char *path); |