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bh=ciIcbPI9hOjqUEVUJJbQtIKfDfIvPSrlIPnUOzP0G8A=; b=DY25rihmMPWUhhnQU7K+sLdoDqsrFKYg3KgZ/Ptv9AvGFQtqDzr16p7kJ1b9+y0bzHUO/g DkE86+EX0z4Q4G4jIfdQL9JBIYSHCKdrYYGe+z6q1bXJf6ASSLJow8zAqq6lzjBaAXg4kt liSpFhtqq+GZN/2ApFVe4tI/088+f1Y= X-MC-Unique: AWv-ANPwM66GRJhnxVtN6g-1 From: Juan Quintela To: qemu-devel@nongnu.org Cc: Peter Xu , Juan Quintela , Leonardo Bras , Paolo Bonzini , David Hildenbrand Subject: [PULL 13/17] util/mmap-alloc: qemu_fd_getfs() Date: Mon, 24 Apr 2023 13:01:15 +0200 Message-Id: <20230424110119.68520-14-quintela@redhat.com> In-Reply-To: <20230424110119.68520-1-quintela@redhat.com> References: <20230424110119.68520-1-quintela@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.172, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1682334279987100007 Content-Type: text/plain; charset="utf-8" From: Peter Xu This new helper fetches file system type for a fd. Only Linux is implemented so far. Currently only tmpfs and hugetlbfs are defined, but it can grow as needed. Signed-off-by: Peter Xu Reviewed-by: David Hildenbrand Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela --- include/qemu/mmap-alloc.h | 7 +++++++ util/mmap-alloc.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/include/qemu/mmap-alloc.h b/include/qemu/mmap-alloc.h index 2825e231a7..8344daaa03 100644 --- a/include/qemu/mmap-alloc.h +++ b/include/qemu/mmap-alloc.h @@ -1,8 +1,15 @@ #ifndef QEMU_MMAP_ALLOC_H #define QEMU_MMAP_ALLOC_H =20 +typedef enum { + QEMU_FS_TYPE_UNKNOWN =3D 0, + QEMU_FS_TYPE_TMPFS, + QEMU_FS_TYPE_HUGETLBFS, + QEMU_FS_TYPE_NUM, +} QemuFsType; =20 size_t qemu_fd_getpagesize(int fd); +QemuFsType qemu_fd_getfs(int fd); =20 /** * qemu_ram_mmap: mmap anonymous memory, the specified file or device. diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c index 5ed7d29183..ed14f9c64d 100644 --- a/util/mmap-alloc.c +++ b/util/mmap-alloc.c @@ -27,8 +27,36 @@ =20 #ifdef CONFIG_LINUX #include +#include #endif =20 +QemuFsType qemu_fd_getfs(int fd) +{ +#ifdef CONFIG_LINUX + struct statfs fs; + int ret; + + if (fd < 0) { + return QEMU_FS_TYPE_UNKNOWN; + } + + do { + ret =3D fstatfs(fd, &fs); + } while (ret !=3D 0 && errno =3D=3D EINTR); + + switch (fs.f_type) { + case TMPFS_MAGIC: + return QEMU_FS_TYPE_TMPFS; + case HUGETLBFS_MAGIC: + return QEMU_FS_TYPE_HUGETLBFS; + default: + return QEMU_FS_TYPE_UNKNOWN; + } +#else + return QEMU_FS_TYPE_UNKNOWN; +#endif +} + size_t qemu_fd_getpagesize(int fd) { #ifdef CONFIG_LINUX --=20 2.39.2