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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.14.107; envelope-from=vsementsov@virtuozzo.com; helo=EUR01-VE1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/17 05:16:12 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, kwolf@redhat.com, vsementsov@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a function to check, is it a file-posix node on top of file in FUSE file system. Signed-off-by: Vladimir Sementsov-Ogievskiy --- include/block/block.h | 2 ++ block/file-posix.c | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index 877fda06a4..51e957f6fb 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -787,4 +787,6 @@ int coroutine_fn bdrv_co_copy_range(BdrvChild *src, uin= t64_t src_offset, BdrvChild *dst, uint64_t dst_offset, uint64_t bytes, BdrvRequestFlags read_= flags, BdrvRequestFlags write_flags); + +bool bdrv_is_file_on_fuse(BlockDriverState *bs); #endif diff --git a/block/file-posix.c b/block/file-posix.c index 560d1c0a94..4100b8dc89 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -324,6 +324,27 @@ static bool dio_byte_aligned(int fd) return false; } =20 +static bool is_fuse(int fd) +{ +#ifdef __linux__ + struct statfs buf; + int ret; + + ret =3D fstatfs(fd, &buf); + if (ret =3D=3D 0 && buf.f_type =3D=3D FUSE_SUPER_MAGIC) { + return true; + } +#endif + return false; +} + +bool bdrv_is_file_on_fuse(BlockDriverState *bs) +{ + BDRVRawState *s =3D bs->opaque; + + return !strcmp(bs->drv->format_name, "file") && is_fuse(s->fd); +} + /* Check if read is allowed with given memory buffer and length. * * This function is used to check O_DIRECT memory buffer and request align= ment. --=20 2.18.0