aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rwxr-xr-xconfigure17
-rw-r--r--fsdev/file-op-9p.h8
-rw-r--r--hw/9pfs/cofile.c24
-rw-r--r--hw/9pfs/virtio-9p-coth.h3
-rw-r--r--hw/9pfs/virtio-9p-device.c2
-rw-r--r--hw/9pfs/virtio-9p-local.c54
-rw-r--r--hw/9pfs/virtio-9p.c9
7 files changed, 116 insertions, 1 deletions
diff --git a/configure b/configure
index f8f7a072b7..4f87e0a43b 100755
--- a/configure
+++ b/configure
@@ -2568,6 +2568,19 @@ if compile_prog "" "" ; then
open_by_handle_at=yes
fi
+########################################
+# check if we have linux/magic.h
+
+linux_magic_h=no
+cat > $TMPC << EOF
+#include <linux/magic.h>
+int main(void) {
+}
+EOF
+if compile_prog "" "" ; then
+ linux_magic_h=yes
+fi
+
##########################################
# End of CC checks
# After here, no more $cc or $ld runs
@@ -3051,6 +3064,10 @@ if test "$open_by_handle_at" = "yes" ; then
echo "CONFIG_OPEN_BY_HANDLE=y" >> $config_host_mak
fi
+if test "$linux_magic_h" = "yes" ; then
+ echo "CONFIG_LINUX_MAGIC_H=y" >> $config_host_mak
+fi
+
# USB host support
case "$usb" in
linux)
diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index af3ecbecb7..d6705c03a1 100644
--- a/fsdev/file-op-9p.h
+++ b/fsdev/file-op-9p.h
@@ -49,6 +49,13 @@ typedef struct FsCred
} FsCred;
struct xattr_operations;
+struct FsContext;
+struct V9fsPath;
+
+typedef struct extended_ops {
+ int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
+ mode_t, uint64_t *);
+} extended_ops;
/* FsContext flag values */
#define PATHNAME_FSCONTEXT 0x1
@@ -64,6 +71,7 @@ typedef struct FsContext
uid_t uid;
int export_flags;
struct xattr_operations **xops;
+ struct extended_ops exops;
/* fs driver specific data */
void *private;
} FsContext;
diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c
index 7ad4bec005..692811e5ab 100644
--- a/hw/9pfs/cofile.c
+++ b/hw/9pfs/cofile.c
@@ -17,6 +17,30 @@
#include "qemu-coroutine.h"
#include "virtio-9p-coth.h"
+int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t st_mode,
+ V9fsStatDotl *v9stat)
+{
+ int err = 0;
+ V9fsState *s = pdu->s;
+
+ if (v9fs_request_cancelled(pdu)) {
+ return -EINTR;
+ }
+ if (s->ctx.exops.get_st_gen) {
+ v9fs_path_read_lock(s);
+ v9fs_co_run_in_worker(
+ {
+ err = s->ctx.exops.get_st_gen(&s->ctx, path, st_mode,
+ &v9stat->st_gen);
+ if (err < 0) {
+ err = -errno;
+ }
+ });
+ v9fs_path_unlock(s);
+ }
+ return err;
+}
+
int v9fs_co_lstat(V9fsPDU *pdu, V9fsPath *path, struct stat *stbuf)
{
int err;
diff --git a/hw/9pfs/virtio-9p-coth.h b/hw/9pfs/virtio-9p-coth.h
index 4630080e53..ca96b9cf2f 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -101,4 +101,7 @@ extern int v9fs_co_preadv(V9fsPDU *, V9fsFidState *,
struct iovec *, int, int64_t);
extern int v9fs_co_name_to_path(V9fsPDU *, V9fsPath *,
const char *, V9fsPath *);
+extern int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t,
+ V9fsStatDotl *v9stat);
+
#endif
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 4fcde50021..6693ce8f56 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -117,6 +117,8 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
s->ctx.export_flags = fse->export_flags;
s->ctx.fs_root = g_strdup(fse->path);
+ s->ctx.exops.get_st_gen = NULL;
+
len = strlen(conf->tag);
if (len > MAX_TAG_LEN) {
fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 47295b7e27..ad2d84153f 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -20,6 +20,24 @@
#include <sys/socket.h>
#include <sys/un.h>
#include <attr/xattr.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
static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
{
@@ -659,10 +677,44 @@ static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
return ret;
}
+static int local_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 = local_open(ctx, path, O_RDONLY);
+ if (fd < 0) {
+ return fd;
+ }
+ err = ioctl(fd, FS_IOC_GETVERSION, st_gen);
+ local_close(ctx, fd);
+ return err;
+}
+
static int local_init(FsContext *ctx)
{
+ int err;
+ struct statfs stbuf;
+
ctx->flags |= PATHNAME_FSCONTEXT;
- return 0;
+ err = statfs(ctx->fs_root, &stbuf);
+ if (!err) {
+ 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 = local_ioc_getversion;
+ break;
+ }
+ }
+ return err;
}
FileOperations local_ops = {
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index dcbcdb0fde..2ad8f84fac 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -1402,6 +1402,15 @@ static void v9fs_getattr(void *opaque)
goto out;
}
stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl);
+
+ /* fill st_gen if requested and supported by underlying fs */
+ if (request_mask & P9_STATS_GEN) {
+ retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl);
+ if (retval < 0) {
+ goto out;
+ }
+ v9stat_dotl.st_result_mask |= P9_STATS_GEN;
+ }
retval = offset;
retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl);
out:
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-22 11:21:06 +0000