mirror of https://github.com/xqemu/xqemu.git
hw/9pfs: Add st_gen support for handle based fs driver
Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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e06a765efb
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edb9eb7352
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@ -21,6 +21,24 @@
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#include <sys/un.h>
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#include <sys/un.h>
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#include <attr/xattr.h>
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#include <attr/xattr.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <linux/fs.h>
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#ifdef CONFIG_LINUX_MAGIC_H
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#include <linux/magic.h>
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#endif
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#include <sys/ioctl.h>
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#ifndef XFS_SUPER_MAGIC
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#define XFS_SUPER_MAGIC 0x58465342
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#endif
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#ifndef EXT2_SUPER_MAGIC
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#define EXT2_SUPER_MAGIC 0xEF53
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#endif
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#ifndef REISERFS_SUPER_MAGIC
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#define REISERFS_SUPER_MAGIC 0x52654973
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#endif
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#ifndef BTRFS_SUPER_MAGIC
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#define BTRFS_SUPER_MAGIC 0x9123683E
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#endif
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struct handle_data {
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struct handle_data {
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int mountfd;
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int mountfd;
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@ -554,9 +572,31 @@ static int handle_unlinkat(FsContext *ctx, V9fsPath *dir,
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return ret;
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return ret;
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}
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}
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static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path,
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mode_t st_mode, uint64_t *st_gen)
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{
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int err, fd;
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/*
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* Do not try to open special files like device nodes, fifos etc
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* We can get fd for regular files and directories only
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*/
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if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
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return 0;
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}
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fd = handle_open(ctx, path, O_RDONLY);
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if (fd < 0) {
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return fd;
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}
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err = ioctl(fd, FS_IOC_GETVERSION, st_gen);
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handle_close(ctx, fd);
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return err;
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}
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static int handle_init(FsContext *ctx)
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static int handle_init(FsContext *ctx)
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{
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{
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int ret, mnt_id;
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int ret, mnt_id;
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struct statfs stbuf;
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struct file_handle fh;
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struct file_handle fh;
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struct handle_data *data = g_malloc(sizeof(struct handle_data));
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struct handle_data *data = g_malloc(sizeof(struct handle_data));
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@ -565,6 +605,17 @@ static int handle_init(FsContext *ctx)
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ret = data->mountfd;
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ret = data->mountfd;
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goto err_out;
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goto err_out;
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}
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}
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ret = statfs(ctx->fs_root, &stbuf);
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if (!ret) {
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switch (stbuf.f_type) {
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case EXT2_SUPER_MAGIC:
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case BTRFS_SUPER_MAGIC:
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case REISERFS_SUPER_MAGIC:
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case XFS_SUPER_MAGIC:
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ctx->exops.get_st_gen = handle_ioc_getversion;
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break;
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}
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}
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memset(&fh, 0, sizeof(struct file_handle));
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memset(&fh, 0, sizeof(struct file_handle));
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ret = name_to_handle(data->mountfd, ".", &fh, &mnt_id, 0);
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ret = name_to_handle(data->mountfd, ".", &fh, &mnt_id, 0);
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if (ret && errno == EOVERFLOW) {
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if (ret && errno == EOVERFLOW) {
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