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s3:vfs_gpfs: Implement fallocate callback for GPFS

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GPFS provides the gpfs_prealloc call. Implement the fallocate
callback with mode VFS_FALLOCATE_EXTEND_SIZE using this call.
There is no support for VFS_FALLOCATE_KEEP_SIZE, so report
this mode as not available.
This commit is contained in:
Christof Schmitt 2012-03-08 13:57:12 -08:00 committed by Christian Ambach
parent 62616784ae
commit 0a896094c6
4 changed files with 79 additions and 0 deletions
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25
docs-xml/manpages-3/vfs_gpfs.8.xml
View File

@ -268,6 +268,31 @@
</varlistentry>
<varlistentry>
<term>gpfs:prealloc = [ yes | no ]</term>
<listitem>
<para>
If set to yes the gpfs_prealloc function will be used in the
fallocate callback when appropriate. If set to no gpfs_prealloc
will not be used. In both cases the system and libc calls are
avoided.
</para>
<itemizedlist>
<listitem><para>
<command>yes (default)</command> - Use gpfs_prealloc for the
fallocate callback.
</para></listitem>
<listitem><para>
<command>no</command> - Do not use gpfs_prealloc for the
fallocate callback.
</para></listitem>
</itemizedlist>
</listitem>
</varlistentry>
<varlistentry>
<term>nfs4:mode = [ simple | special ]</term>
<listitem>
<para>

12
source3/modules/gpfs.c
View File

@ -35,6 +35,7 @@ static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags, struct gpfs_winattr *attrs);
static int (*gpfs_get_winattrs_path_fn)(char *pathname, struct gpfs_winattr *attrs);
static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
static int (*gpfs_prealloc_fn)(int fd, gpfs_off64_t startOffset, gpfs_off64_t bytesToPrealloc);
static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
static int (*gpfs_lib_init_fn)(int flags);
static int (*gpfs_quotactl_fn)(char *pathname, int cmd, int id, void *bufferP);
@ -177,6 +178,16 @@ int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs)
return gpfs_get_winattrs_fn(fd, attrs);
}
int smbd_gpfs_prealloc(int fd, gpfs_off64_t start, gpfs_off64_t bytes)
{
if (gpfs_prealloc_fn == NULL) {
errno = ENOSYS;
return -1;
}
return gpfs_prealloc_fn(fd, start, bytes);
}
int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
{
if (gpfs_set_winattrs_path_fn == NULL) {
@ -329,6 +340,7 @@ void init_gpfs(void)
init_gpfs_function(&gpfs_get_winattrs_path_fn,"gpfs_get_winattrs_path");
init_gpfs_function(&gpfs_set_winattrs_path_fn,"gpfs_set_winattrs_path");
init_gpfs_function(&gpfs_get_winattrs_fn,"gpfs_get_winattrs");
init_gpfs_function(&gpfs_prealloc_fn, "gpfs_prealloc");
init_gpfs_function(&gpfs_ftruncate_fn, "gpfs_ftruncate");
init_gpfs_function(&gpfs_lib_init_fn,"gpfs_lib_init");
init_gpfs_function(&gpfs_quotactl_fn, "gpfs_quotactl");

41
source3/modules/vfs_gpfs.c
View File

@ -44,6 +44,7 @@ struct gpfs_config_data {
bool ftruncate;
bool getrealfilename;
bool dfreequota;
bool prealloc;
};
@ -1263,6 +1264,42 @@ static int vfs_gpfs_ntimes(struct vfs_handle_struct *handle,
}
int vfs_gpfs_fallocate(struct vfs_handle_struct *handle,
struct files_struct *fsp, enum vfs_fallocate_mode mode,
SMB_OFF_T offset, SMB_OFF_T len)
{
int ret;
struct gpfs_config_data *config;
SMB_VFS_HANDLE_GET_DATA(handle, config,
struct gpfs_config_data,
return -1);
if (!config->prealloc) {
/* you should better not run fallocate() on GPFS at all */
errno = ENOTSUP;
return -1;
}
if (mode == VFS_FALLOCATE_KEEP_SIZE) {
DEBUG(10, ("Unsupported VFS_FALLOCATE_KEEP_SIZE\n"));
errno = ENOTSUP;
return -1;
}
ret = smbd_gpfs_prealloc(fsp->fh->fd, offset, len);
if (ret == -1 && errno != ENOSYS) {
DEBUG(0, ("GPFS prealloc failed: %s\n", strerror(errno)));
} else if (ret == -1 && errno == ENOSYS) {
DEBUG(10, ("GPFS prealloc not supported.\n"));
} else {
DEBUG(10, ("GPFS prealloc succeeded.\n"));
}
return ret;
}
static int vfs_gpfs_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
SMB_OFF_T len)
{
@ -1390,6 +1427,9 @@ int vfs_gpfs_connect(struct vfs_handle_struct *handle, const char *service,
config->dfreequota = lp_parm_bool(SNUM(handle->conn), "gpfs",
"dfreequota", false);
config->prealloc = lp_parm_bool(SNUM(handle->conn), "gpfs",
"prealloc", true);
SMB_VFS_HANDLE_SET_DATA(handle, config,
NULL, struct gpfs_config_data,
return -1);
@ -1582,6 +1622,7 @@ static struct vfs_fn_pointers vfs_gpfs_fns = {
.is_offline_fn = vfs_gpfs_is_offline,
.aio_force_fn = vfs_gpfs_aio_force,
.sendfile_fn = vfs_gpfs_sendfile,
.fallocate_fn = vfs_gpfs_fallocate,
.open_fn = vfs_gpfs_open,
.ftruncate_fn = vfs_gpfs_ftruncate
};

1
source3/modules/vfs_gpfs.h
View File

@ -33,6 +33,7 @@ int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs);
int get_gpfs_winattrs(char * pathname,struct gpfs_winattr *attrs);
int set_gpfs_winattrs(char * pathname,int flags,struct gpfs_winattr *attrs);
int smbd_gpfs_prealloc(int fd, gpfs_off64_t start, gpfs_off64_t bytes);
int smbd_gpfs_ftruncate(int fd, gpfs_off64_t length);
int get_gpfs_quota(const char *pathname, int type, int id,
struct gpfs_quotaInfo *qi);