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[70.52.229.124]) by smtp.gmail.com with ESMTPSA id t12-20020a05620a0b0c00b007468b183a65sm351481qkg.30.2023.04.19.09.17.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 09:17:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1681921066; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mA6pp+vQCW8Hb5Iclg6SNJ15lnYctRVp38DJGWj5fhY=; b=I+aeU46KRRycz4hPqYihaHOP+QJOZELyYC25jOBT80RM7Fmvmf0/lwt2zWLJxyVXgdgep6 pIXfBfSUTTz2320ylY8kyVXz0d+AP1i+arSwm5ICWVNEZ4usDCUqjz9gzPB7um+trtJGI7 FIb5FjbEUbp9j9b/Pbrp0iU8JzWvEGY= X-MC-Unique: _CjkED3zNbCNJQMvrAIC9w-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681921064; x=1684513064; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=mA6pp+vQCW8Hb5Iclg6SNJ15lnYctRVp38DJGWj5fhY=; b=bWopprWBY/rI9/CxZNYKL2S3ZSJXxkGYnf6HRm9WTBM4vL4kcpfnRYW41QCmFAjCwq xj6rAciySXfQ3zcJo/mJ9qb3c6XeXXoq0F34x9IUFCGo+IpnSlNtYLnzF4kKBD03dYRq tqkUcbigg4JjIipi/JhQn0ewThXMHt5AF897Ln9aCzsDJsn3L3VeJ6RZOkwQNpk7/ZLU Eg/6IV2umFgU44Iw0tqS44Rgfaf3lk4853QmhJzXi0NiRgYBzHD9FPXkwvi2nmF7GwBZ AqiGEf3hmwBvWaxG0BFCmGmdgsPl4+pUGbJy1Sya61W7tQ6H6FDK3WaqGxyRCH32t9dt 1ZgQ== X-Gm-Message-State: AAQBX9cHYYHImWdV5ap6QDkAxKf4gWEq5cq4p6rS1HHW1jzaeotW9yN4 6brmG/dNHgxvgOf2r41XtAn8yrPbPlVjwdu1okQ1wt34JBZQSa9uZtpde4gQ0a1gPc/ysEcJxdy 3jgTnk2UtWoDqkpDPNEGEDCcBmB9VWVbTriN6HxEKQw2z9pJEshk1IZ2Ifbt4eCYsHvQchvJF X-Received: by 2002:a05:6214:5095:b0:5ef:55d8:7164 with SMTP id kk21-20020a056214509500b005ef55d87164mr27129894qvb.5.1681921064215; Wed, 19 Apr 2023 09:17:44 -0700 (PDT) X-Google-Smtp-Source: AKy350aGq6yiCVVvI3FKrZ3g4JSBLM9hafVsuOJ2GPEm6J1FzZQ3o9FhsCeOd5Ts7ZuneUwowk+TJg== X-Received: by 2002:a05:6214:5095:b0:5ef:55d8:7164 with SMTP id kk21-20020a056214509500b005ef55d87164mr27129846qvb.5.1681921063884; Wed, 19 Apr 2023 09:17:43 -0700 (PDT) From: Peter Xu To: qemu-devel@nongnu.org Cc: Paolo Bonzini , peterx@redhat.com, =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Juan Quintela , Leonardo Bras Soares Passos , David Hildenbrand Subject: [PATCH v2 1/4] util/mmap-alloc: qemu_fd_getfs() Date: Wed, 19 Apr 2023 12:17:36 -0400 Message-Id: <20230419161739.1129988-2-peterx@redhat.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230419161739.1129988-1-peterx@redhat.com> References: <20230419161739.1129988-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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: 1681921142008100003 Content-Type: text/plain; charset="utf-8" This new helper fetches file system type for a fd. Only Linux is implemented so far. Currently only tmpfs and hugetlbfs is defined, but it can grow per need. Signed-off-by: Peter Xu Reviewed-by: David Hildenbrand Reviewed-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 2.39.1