[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH -V2 09/13] hw/9pfs: Add st_gen support for handle ba
From: |
Aneesh Kumar K.V |
Subject: |
[Qemu-devel] [PATCH -V2 09/13] hw/9pfs: Add st_gen support for handle based fs driver |
Date: |
Tue, 11 Oct 2011 16:11:41 +0530 |
From: Harsh Prateek Bora <address@hidden>
Signed-off-by: Harsh Prateek Bora <address@hidden>
Signed-off-by: Aneesh Kumar K.V <address@hidden>
---
hw/9pfs/virtio-9p-handle.c | 51 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 51 insertions(+), 0 deletions(-)
diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c
index fbe3e62..525c91a 100644
--- a/hw/9pfs/virtio-9p-handle.c
+++ b/hw/9pfs/virtio-9p-handle.c
@@ -21,6 +21,24 @@
#include <sys/un.h>
#include <attr/xattr.h>
#include <unistd.h>
+#include <linux/fs.h>
+#ifdef CONFIG_LINUX_MAGIC_H
+#include <linux/magic.h>
+#endif
+#include <sys/ioctl.h>
+
+#ifndef XFS_SUPER_MAGIC
+#define XFS_SUPER_MAGIC 0x58465342
+#endif
+#ifndef EXT2_SUPER_MAGIC
+#define EXT2_SUPER_MAGIC 0xEF53
+#endif
+#ifndef REISERFS_SUPER_MAGIC
+#define REISERFS_SUPER_MAGIC 0x52654973
+#endif
+#ifndef BTRFS_SUPER_MAGIC
+#define BTRFS_SUPER_MAGIC 0x9123683E
+#endif
struct handle_data {
int mountfd;
@@ -550,9 +568,31 @@ static int handle_unlinkat(FsContext *ctx, V9fsPath *dir,
return ret;
}
+static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path,
+ mode_t st_mode, uint64_t *st_gen)
+{
+ int err, fd;
+
+ /*
+ * Do not try to open special files like device nodes, fifos etc
+ * We can get fd for regular files and directories only
+ */
+ if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
+ return 0;
+ }
+ fd = handle_open(ctx, path, O_RDONLY);
+ if (fd < 0) {
+ return fd;
+ }
+ err = ioctl(fd, FS_IOC_GETVERSION, st_gen);
+ handle_close(ctx, fd);
+ return err;
+}
+
static int handle_init(FsContext *ctx)
{
int ret, mnt_id;
+ struct statfs stbuf;
struct file_handle fh;
struct handle_data *data = g_malloc(sizeof(struct handle_data));
@@ -561,6 +601,17 @@ 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 EXT2_SUPER_MAGIC:
+ 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) {
--
1.7.5.4
- [Qemu-devel] [PATCH V2 00/13] VirtFS update, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 01/13] hw/9pfs: Use ioeventfd for 9p, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 08/13] hw/9pfs: Add st_gen support in getattr reply, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 04/13] hw/9pfs: Fix build error on platform that don't support futimens, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 07/13] hw/9pfs: Add open flag mapping, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 12/13] scripts: Simpletrace log analysis script for pretty-printing 9p log., Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 09/13] hw/9pfs: Add st_gen support for handle based fs driver,
Aneesh Kumar K.V <=
- [Qemu-devel] [PATCH -V2 02/13] hw/9pfs: Add new virtfs option cache=writethrough to skip host page cache, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 13/13] hw/9pfs: Use fs driver specific lstat, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 11/13] hw/9pfs: Remove virtio-9p-debug.* infra to be replaced by Qemu Tracing., Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 05/13] virtio-9p: Use 9P specific Lock constants, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 06/13] hw/9pfs: Ensure an error is reported to user if 9pfs mount tag is too long, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 03/13] qemu-options.hx: Update virtfs command documentation, Aneesh Kumar K.V, 2011/10/11
- [Qemu-devel] [PATCH -V2 10/13] hw/9pfs: Introduce tracing for 9p pdu handlers, Aneesh Kumar K.V, 2011/10/11