On Thu, May 18, 2017 at 01:54:36PM -0400, Jeff Cody wrote: > On Thu, May 18, 2017 at 11:54:22AM +0200, Niels de Vos wrote: > > Add missing support for "preallocation=falloc" to the Gluster block > > driver. This change bases its logic on that of block/file-posix.c and > > removed the gluster_supports_zerofill() and qemu_gluster_zerofill() > > functiond in favour of #ifdef checks in an easy to read > > switch-statement. > > > > Both glfs_zerofill() and glfs_fallocate() have been introduced with > > GlusterFS 3.5.0 (pkg-config glusterfs-api = 6). A #define for the > > availability of glfs_fallocate() has been added to ./configure. > > > > Reported-by: Satheesaran Sundaramoorthi <sasun...@redhat.com> > > URL: https://bugzilla.redhat.com/1450759 > > Signed-off-by: Niels de Vos <nde...@redhat.com> > > --- > > v2 changes requested by Jeff Cody: > > - add CONFIG_GLUSTERFS_FALLOCATE > > - remove unneeded wrapper qemu_gluster_zerofill() > > > > block/gluster.c | 76 > > ++++++++++++++++++++++++++++++--------------------------- > > configure | 6 +++++ > > 2 files changed, 46 insertions(+), 36 deletions(-) > > > > diff --git a/block/gluster.c b/block/gluster.c > > index 7c76cd0..0610183 100644 > > --- a/block/gluster.c > > +++ b/block/gluster.c > > @@ -964,29 +964,6 @@ static coroutine_fn int > > qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs, > > qemu_coroutine_yield(); > > return acb.ret; > > } > > - > > -static inline bool gluster_supports_zerofill(void) > > -{ > > - return 1; > > -} > > - > > -static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset, > > - int64_t size) > > -{ > > - return glfs_zerofill(fd, offset, size); > > -} > > - > > -#else > > -static inline bool gluster_supports_zerofill(void) > > -{ > > - return 0; > > -} > > - > > -static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset, > > - int64_t size) > > -{ > > - return 0; > > -} > > #endif > > > > static int qemu_gluster_create(const char *filename, > > @@ -996,9 +973,10 @@ static int qemu_gluster_create(const char *filename, > > struct glfs *glfs; > > struct glfs_fd *fd; > > int ret = 0; > > - int prealloc = 0; > > + PreallocMode prealloc; > > int64_t total_size = 0; > > char *tmp = NULL; > > + Error *local_err = NULL; > > > > gconf = g_new0(BlockdevOptionsGluster, 1); > > gconf->debug = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG, > > @@ -1026,13 +1004,12 @@ static int qemu_gluster_create(const char *filename, > > BDRV_SECTOR_SIZE); > > > > tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC); > > - if (!tmp || !strcmp(tmp, "off")) { > > - prealloc = 0; > > - } else if (!strcmp(tmp, "full") && gluster_supports_zerofill()) { > > - prealloc = 1; > > - } else { > > - error_setg(errp, "Invalid preallocation mode: '%s'" > > - " or GlusterFS doesn't support zerofill API", > > tmp); > > + prealloc = qapi_enum_parse(PreallocMode_lookup, tmp, > > + PREALLOC_MODE__MAX, PREALLOC_MODE_OFF, > > + &local_err); > > + g_free(tmp); > > + if (local_err) { > > + error_propagate(errp, local_err); > > ret = -EINVAL; > > goto out; > > } > > @@ -1041,21 +1018,48 @@ static int qemu_gluster_create(const char *filename, > > O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | > > S_IWUSR); > > if (!fd) { > > ret = -errno; > > - } else { > > + goto out; > > + } > > + > > + switch (prealloc) { > > +#ifdef CONFIG_GLUSTERFS_FALLOCATE > > + case PREALLOC_MODE_FALLOC: > > + if (!glfs_fallocate(fd, 0, 0, total_size)) { > > Does glfs_fallocate() return 0 on failure? Both posix and linux versions of > fallocate() return 0 on success.
No, it should return 0 on success. This is a copy/paste error from the glfs_ftruncate() below, and that if/else structure is a little different. I did not notice the error message during my testing though... Will check it again tomorrow. Thanks, Niels > > > + error_setg(errp, "Could not preallocate data for the new > > file"); > > + ret = -errno; > > + } > > + break; > > +#endif /* CONFIG_GLUSTERFS_FALLOCATE */ > > +#ifdef CONFIG_GLUSTERFS_ZEROFILL > > + case PREALLOC_MODE_FULL: > > if (!glfs_ftruncate(fd, total_size)) { > > - if (prealloc && qemu_gluster_zerofill(fd, 0, total_size)) { > > + if (glfs_zerofill(fd, 0, total_size)) { > > + error_setg(errp, "Could not zerofill the new file"); > > ret = -errno; > > } > > } else { > > + error_setg(errp, "Could not resize file"); > > ret = -errno; > > } > > - > > - if (glfs_close(fd) != 0) { > > + break; > > +#endif /* CONFIG_GLUSTERFS_ZEROFILL */ > > + case PREALLOC_MODE_OFF: > > + if (glfs_ftruncate(fd, total_size) != 0) { > > ret = -errno; > > + error_setg(errp, "Could not resize file"); > > } > > + break; > > + default: > > + ret = -EINVAL; > > + error_setg(errp, "Unsupported preallocation mode: %s", > > + PreallocMode_lookup[prealloc]); > > + break; > > + } > > + > > + if (glfs_close(fd) != 0) { > > + ret = -errno; > > } > > out: > > - g_free(tmp); > > qapi_free_BlockdevOptionsGluster(gconf); > > glfs_clear_preopened(glfs); > > return ret; > > diff --git a/configure b/configure > > index 7c020c0..8b8291e 100755 > > --- a/configure > > +++ b/configure > > @@ -300,6 +300,7 @@ seccomp="" > > glusterfs="" > > glusterfs_xlator_opt="no" > > glusterfs_discard="no" > > +glusterfs_fallocate="no" > > glusterfs_zerofill="no" > > gtk="" > > gtkabi="" > > @@ -3576,6 +3577,7 @@ if test "$glusterfs" != "no" ; then > > glusterfs_discard="yes" > > fi > > if $pkg_config --atleast-version=6 glusterfs-api; then > > + glusterfs_fallocate="yes" > > glusterfs_zerofill="yes" > > fi > > else > > @@ -5780,6 +5782,10 @@ if test "$glusterfs_discard" = "yes" ; then > > echo "CONFIG_GLUSTERFS_DISCARD=y" >> $config_host_mak > > fi > > > > +if test "$glusterfs_fallocate" = "yes" ; then > > + echo "CONFIG_GLUSTERFS_FALLOCATE=y" >> $config_host_mak > > +fi > > + > > if test "$glusterfs_zerofill" = "yes" ; then > > echo "CONFIG_GLUSTERFS_ZEROFILL=y" >> $config_host_mak > > fi > > -- > > 2.9.3 > >