From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:41050) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qoup0-0008Tp-CN for qemu-devel@nongnu.org; Thu, 04 Aug 2011 06:06:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Qouoz-0004cc-BO for qemu-devel@nongnu.org; Thu, 04 Aug 2011 06:06:34 -0400 Received: from e23smtp02.au.ibm.com ([202.81.31.144]:45831) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Qouoy-0004au-Rg for qemu-devel@nongnu.org; Thu, 04 Aug 2011 06:06:33 -0400 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [202.81.31.246]) by e23smtp02.au.ibm.com (8.14.4/8.13.1) with ESMTP id p74A02Lo025714 for ; Thu, 4 Aug 2011 20:00:02 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p74A5Qe31020088 for ; Thu, 4 Aug 2011 20:05:26 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p74A6FGA000716 for ; Thu, 4 Aug 2011 20:06:15 +1000 From: Harsh Prateek Bora Date: Thu, 4 Aug 2011 15:36:11 +0530 Message-Id: <1312452371-10375-3-git-send-email-harsh@linux.vnet.ibm.com> In-Reply-To: <1312452371-10375-1-git-send-email-harsh@linux.vnet.ibm.com> References: <1312452371-10375-1-git-send-email-harsh@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 2/2] i_generation / st_gen support for handle based fs driver List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aneesh.kumar@linux.vnet.ibm.com This patch provides support for st_gen for handle based fs type server. Currently the support is provided for ext4, btrfs, reiserfs and xfs. Signed-off-by: Harsh Prateek Bora --- hw/9pfs/virtio-9p-handle.c | 30 ++++++++++++++++++++++++++++++ 1 files changed, 30 insertions(+), 0 deletions(-) diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c index 548a841..8dff662 100644 --- a/hw/9pfs/virtio-9p-handle.c +++ b/hw/9pfs/virtio-9p-handle.c @@ -20,6 +20,9 @@ #include #include #include +#include +#include +#include struct handle_data { int mountfd; @@ -543,9 +546,25 @@ static int handle_unlinkat(FsContext *ctx, V9fsPath *dir, return ret; } +static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path, uint64_t *st_gen) +{ + int mode = 0600; + int fd; + + fd = handle_open(ctx, path, mode); + if(fd < 0) { + return fd; + } + return ioctl(fd, FS_IOC_GETVERSION, st_gen); + +} + +/* XFS_SUPER_MAGIC not available in linux/fs.h */ +#define XFS_SUPER_MAGIC 0x58465342 static int handle_init(FsContext *ctx) { int ret, mnt_id; + struct statfs stbuf; struct file_handle fh; struct handle_data *data = qemu_malloc(sizeof(struct handle_data)); data->mountfd = open(ctx->fs_root, O_DIRECTORY); @@ -553,6 +572,17 @@ static int handle_init(FsContext *ctx) ret = data->mountfd; goto err_out; } + ret = statfs(ctx->fs_root, &stbuf); + if(!ret) { + switch (stbuf.f_type) { + case EXT4_SUPER_MAGIC: /* same magic val for ext2/3 */ + case BTRFS_SUPER_MAGIC: + case REISERFS_SUPER_MAGIC: + case XFS_SUPER_MAGIC: + ctx->exops.get_st_gen = handle_ioc_getversion; + break; + } + } memset(&fh, 0, sizeof(struct file_handle)); ret = name_to_handle(data->mountfd, ".", &fh, &mnt_id, 0); if (ret && errno == EOVERFLOW) { -- 1.7.1.1