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hw/9pfs: Abstract open state of fid to V9fsFidOpenState

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To implement synthetic file system in Qemu we may not really
require file descriptor and Dir *. Make generic code use
V9fsFidOpenState instead.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2011-10-25 12:10:40 +05:30
parent 2c74c2cb4b
commit cc720ddb54
8 changed files with 179 additions and 141 deletions
Download patch file Download diff file Expand all files Collapse all files

96
hw/9pfs/virtio-9p-handle.c
View file

@ -133,81 +133,91 @@ static ssize_t handle_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
return ret;
}
static int handle_close(FsContext *ctx, int fd)
static int handle_close(FsContext *ctx, V9fsFidOpenState *fs)
{
return close(fd);
return close(fs->fd);
}
static int handle_closedir(FsContext *ctx, DIR *dir)
static int handle_closedir(FsContext *ctx, V9fsFidOpenState *fs)
{
return closedir(dir);
return closedir(fs->dir);
}
static int handle_open(FsContext *ctx, V9fsPath *fs_path, int flags)
static int handle_open(FsContext *ctx, V9fsPath *fs_path,
int flags, V9fsFidOpenState *fs)
{
struct handle_data *data = (struct handle_data *)ctx->private;
return open_by_handle(data->mountfd, fs_path->data, flags);
fs->fd = open_by_handle(data->mountfd, fs_path->data, flags);
return fs->fd;
}
static DIR *handle_opendir(FsContext *ctx, V9fsPath *fs_path)
static int handle_opendir(FsContext *ctx,
V9fsPath *fs_path, V9fsFidOpenState *fs)
{
int fd;
fd = handle_open(ctx, fs_path, O_DIRECTORY);
if (fd < 0) {
return NULL;
int ret;
ret = handle_open(ctx, fs_path, O_DIRECTORY, fs);
if (ret < 0) {
return -1;
}
return fdopendir(fd);
fs->dir = fdopendir(ret);
if (!fs->dir) {
return -1;
}
return 0;
}
static void handle_rewinddir(FsContext *ctx, DIR *dir)
static void handle_rewinddir(FsContext *ctx, V9fsFidOpenState *fs)
{
return rewinddir(dir);
return rewinddir(fs->dir);
}
static off_t handle_telldir(FsContext *ctx, DIR *dir)
static off_t handle_telldir(FsContext *ctx, V9fsFidOpenState *fs)
{
return telldir(dir);
return telldir(fs->dir);
}
static int handle_readdir_r(FsContext *ctx, DIR *dir, struct dirent *entry,
static int handle_readdir_r(FsContext *ctx, V9fsFidOpenState *fs,
struct dirent *entry,
struct dirent **result)
{
return readdir_r(dir, entry, result);
return readdir_r(fs->dir, entry, result);
}
static void handle_seekdir(FsContext *ctx, DIR *dir, off_t off)
static void handle_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off)
{
return seekdir(dir, off);
return seekdir(fs->dir, off);
}
static ssize_t handle_preadv(FsContext *ctx, int fd, const struct iovec *iov,
static ssize_t handle_preadv(FsContext *ctx, V9fsFidOpenState *fs,
const struct iovec *iov,
int iovcnt, off_t offset)
{
#ifdef CONFIG_PREADV
return preadv(fd, iov, iovcnt, offset);
return preadv(fs->fd, iov, iovcnt, offset);
#else
int err = lseek(fd, offset, SEEK_SET);
int err = lseek(fs->fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
return readv(fd, iov, iovcnt);
return readv(fs->fd, iov, iovcnt);
}
#endif
}
static ssize_t handle_pwritev(FsContext *ctx, int fd, const struct iovec *iov,
static ssize_t handle_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
const struct iovec *iov,
int iovcnt, off_t offset)
{
ssize_t ret;
#ifdef CONFIG_PREADV
ret = pwritev(fd, iov, iovcnt, offset);
ret = pwritev(fs->fd, iov, iovcnt, offset);
#else
int err = lseek(fd, offset, SEEK_SET);
int err = lseek(fs->fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
ret = writev(fd, iov, iovcnt);
ret = writev(fs->fd, iov, iovcnt);
}
#endif
#ifdef CONFIG_SYNC_FILE_RANGE
@ -217,7 +227,7 @@ static ssize_t handle_pwritev(FsContext *ctx, int fd, const struct iovec *iov,
* We want to ensure that we don't leave dirty pages in the cache
* after write when writeout=immediate is sepcified.
*/
sync_file_range(fd, offset, ret,
sync_file_range(fs->fd, offset, ret,
SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE);
}
#endif
@ -274,13 +284,14 @@ static int handle_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
return ret;
}
static int handle_fstat(FsContext *fs_ctx, int fd, struct stat *stbuf)
static int handle_fstat(FsContext *fs_ctx, V9fsFidOpenState *fs,
struct stat *stbuf)
{
return fstat(fd, stbuf);
return fstat(fs->fd, stbuf);
}
static int handle_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int flags, FsCred *credp)
int flags, FsCred *credp, V9fsFidOpenState *fs)
{
int ret;
int dirfd, fd;
@ -296,6 +307,8 @@ static int handle_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
if (ret < 0) {
close(fd);
fd = ret;
} else {
fs->fd = fd;
}
}
close(dirfd);
@ -411,12 +424,12 @@ static int handle_remove(FsContext *ctx, const char *path)
return -1;
}
static int handle_fsync(FsContext *ctx, int fd, int datasync)
static int handle_fsync(FsContext *ctx, V9fsFidOpenState *fs, int datasync)
{
if (datasync) {
return qemu_fdatasync(fd);
return qemu_fdatasync(fs->fd);
} else {
return fsync(fd);
return fsync(fs->fd);
}
}
@ -575,7 +588,8 @@ static int handle_unlinkat(FsContext *ctx, V9fsPath *dir,
static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path,
mode_t st_mode, uint64_t *st_gen)
{
int err, fd;
int err;
V9fsFidOpenState fid_open;
/*
* Do not try to open special files like device nodes, fifos etc
@ -584,12 +598,12 @@ static int handle_ioc_getversion(FsContext *ctx, V9fsPath *path,
if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
return 0;
}
fd = handle_open(ctx, path, O_RDONLY);
if (fd < 0) {
return fd;
err = handle_open(ctx, path, O_RDONLY, &fid_open);
if (err < 0) {
return err;
}
err = ioctl(fd, FS_IOC_GETVERSION, st_gen);
handle_close(ctx, fd);
err = ioctl(fid_open.fd, FS_IOC_GETVERSION, st_gen);
handle_close(ctx, &fid_open);
return err;
}