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Merge remote-tracking branch 'aneesh/for-upstream-5' into staging

This commit is contained in:
Anthony Liguori 2011-09-29 13:32:05 -05:00
parent 0bce98df26 5f5422258e
commit 62ec6073cd
14 changed files with 1716 additions and 542 deletions
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8
Makefile.objs
View File

@ -304,11 +304,11 @@ sound-obj-$(CONFIG_HDA) += intel-hda.o hda-audio.o
adlib.o fmopl.o: QEMU_CFLAGS += -DBUILD_Y8950=0
hw-obj-$(CONFIG_SOUND) += $(sound-obj-y)
9pfs-nested-$(CONFIG_VIRTFS) = virtio-9p.o virtio-9p-debug.o
9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-local.o virtio-9p-xattr.o
9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-xattr-user.o virtio-9p-posix-acl.o
9pfs-nested-$(CONFIG_VIRTFS) = virtio-9p.o virtio-9p-debug.o
9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-local.o virtio-9p-xattr.o
9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-xattr-user.o virtio-9p-posix-acl.o
9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-coth.o cofs.o codir.o cofile.o
9pfs-nested-$(CONFIG_VIRTFS) += coxattr.o
9pfs-nested-$(CONFIG_VIRTFS) += coxattr.o virtio-9p-handle.o
hw-obj-$(CONFIG_REALLY_VIRTFS) += $(addprefix 9pfs/, $(9pfs-nested-y))
$(addprefix 9pfs/, $(9pfs-nested-y)): QEMU_CFLAGS+=$(GLIB_CFLAGS)

54
fsdev/file-op-9p.h
View File

@ -19,6 +19,7 @@
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/vfs.h>
#define SM_LOCAL_MODE_BITS 0600
#define SM_LOCAL_DIR_MODE_BITS 0700
@ -49,51 +50,68 @@ typedef struct FsCred
struct xattr_operations;
/* FsContext flag values */
#define PATHNAME_FSCONTEXT 0x1
typedef struct FsContext
{
int flags;
char *fs_root;
SecModel fs_sm;
uid_t uid;
struct xattr_operations **xops;
/* fs driver specific data */
void *private;
} FsContext;
typedef struct V9fsPath {
int16_t size;
char *data;
} V9fsPath;
void cred_init(FsCred *);
typedef struct FileOperations
{
int (*lstat)(FsContext *, const char *, struct stat *);
ssize_t (*readlink)(FsContext *, const char *, char *, size_t);
int (*chmod)(FsContext *, const char *, FsCred *);
int (*chown)(FsContext *, const char *, FsCred *);
int (*mknod)(FsContext *, const char *, FsCred *);
int (*utimensat)(FsContext *, const char *, const struct timespec *);
int (*init)(struct FsContext *);
int (*lstat)(FsContext *, V9fsPath *, struct stat *);
ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
int (*chmod)(FsContext *, V9fsPath *, FsCred *);
int (*chown)(FsContext *, V9fsPath *, FsCred *);
int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
int (*remove)(FsContext *, const char *);
int (*symlink)(FsContext *, const char *, const char *, FsCred *);
int (*link)(FsContext *, const char *, const char *);
int (*symlink)(FsContext *, const char *, V9fsPath *,
const char *, FsCred *);
int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
int (*setuid)(FsContext *, uid_t);
int (*close)(FsContext *, int);
int (*closedir)(FsContext *, DIR *);
DIR *(*opendir)(FsContext *, const char *);
int (*open)(FsContext *, const char *, int);
int (*open2)(FsContext *, const char *, int, FsCred *);
DIR *(*opendir)(FsContext *, V9fsPath *);
int (*open)(FsContext *, V9fsPath *, int);
int (*open2)(FsContext *, V9fsPath *, const char *, int, FsCred *);
void (*rewinddir)(FsContext *, DIR *);
off_t (*telldir)(FsContext *, DIR *);
int (*readdir_r)(FsContext *, DIR *, struct dirent *, struct dirent **);
void (*seekdir)(FsContext *, DIR *, off_t);
ssize_t (*preadv)(FsContext *, int, const struct iovec *, int, off_t);
ssize_t (*pwritev)(FsContext *, int, const struct iovec *, int, off_t);
int (*mkdir)(FsContext *, const char *, FsCred *);
int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
int (*fstat)(FsContext *, int, struct stat *);
int (*rename)(FsContext *, const char *, const char *);
int (*truncate)(FsContext *, const char *, off_t);
int (*truncate)(FsContext *, V9fsPath *, off_t);
int (*fsync)(FsContext *, int, int);
int (*statfs)(FsContext *s, const char *path, struct statfs *stbuf);
ssize_t (*lgetxattr)(FsContext *, const char *,
int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
const char *, void *, size_t);
ssize_t (*llistxattr)(FsContext *, const char *, void *, size_t);
int (*lsetxattr)(FsContext *, const char *,
ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
int (*lsetxattr)(FsContext *, V9fsPath *,
const char *, void *, size_t, int);
int (*lremovexattr)(FsContext *, const char *, const char *);
int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
V9fsPath *newdir, const char *new_name);
int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
void *opaque;
} FileOperations;

1
fsdev/qemu-fsdev.c
View File

@ -23,6 +23,7 @@ static QTAILQ_HEAD(FsTypeEntry_head, FsTypeListEntry) fstype_entries =
static FsTypeTable FsTypes[] = {
{ .name = "local", .ops = &local_ops},
{ .name = "handle", .ops = &handle_ops},
};
int qemu_fsdev_add(QemuOpts *opts)

1
fsdev/qemu-fsdev.h
View File

@ -52,4 +52,5 @@ typedef struct FsTypeListEntry {
int qemu_fsdev_add(QemuOpts *opts);
FsTypeEntry *get_fsdev_fsentry(char *id);
extern FileOperations local_ops;
extern FileOperations handle_ops;
#endif

64
hw/9pfs/codir.c
View File

@ -17,11 +17,15 @@
#include "qemu-coroutine.h"
#include "virtio-9p-coth.h"
int v9fs_co_readdir_r(V9fsState *s, V9fsFidState *fidp, struct dirent *dent,
int v9fs_co_readdir_r(V9fsPDU *pdu, V9fsFidState *fidp, struct dirent *dent,
struct dirent **result)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
errno = 0;
@ -35,10 +39,14 @@ int v9fs_co_readdir_r(V9fsState *s, V9fsFidState *fidp, struct dirent *dent,
return err;
}
off_t v9fs_co_telldir(V9fsState *s, V9fsFidState *fidp)
off_t v9fs_co_telldir(V9fsPDU *pdu, V9fsFidState *fidp)
{
off_t err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->telldir(&s->ctx, fidp->fs.dir);
@ -49,67 +57,103 @@ off_t v9fs_co_telldir(V9fsState *s, V9fsFidState *fidp)
return err;
}
void v9fs_co_seekdir(V9fsState *s, V9fsFidState *fidp, off_t offset)
void v9fs_co_seekdir(V9fsPDU *pdu, V9fsFidState *fidp, off_t offset)
{
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return;
}
v9fs_co_run_in_worker(
{
s->ops->seekdir(&s->ctx, fidp->fs.dir, offset);
});
}
void v9fs_co_rewinddir(V9fsState *s, V9fsFidState *fidp)
void v9fs_co_rewinddir(V9fsPDU *pdu, V9fsFidState *fidp)
{
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return;
}
v9fs_co_run_in_worker(
{
s->ops->rewinddir(&s->ctx, fidp->fs.dir);
});
}
int v9fs_co_mkdir(V9fsState *s, char *name, mode_t mode, uid_t uid, gid_t gid)
int v9fs_co_mkdir(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name,
mode_t mode, uid_t uid, gid_t gid, struct stat *stbuf)
{
int err;
FsCred cred;
V9fsPath path;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;;
}
cred_init(&cred);
cred.fc_mode = mode;
cred.fc_uid = uid;
cred.fc_gid = gid;
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->mkdir(&s->ctx, name, &cred);
err = s->ops->mkdir(&s->ctx, &fidp->path, name->data, &cred);
if (err < 0) {
err = -errno;
} else {
v9fs_path_init(&path);
err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
if (!err) {
err = s->ops->lstat(&s->ctx, &path, stbuf);
if (err < 0) {
err = -errno;
}
}
v9fs_path_free(&path);
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_opendir(V9fsState *s, V9fsFidState *fidp)
int v9fs_co_opendir(V9fsPDU *pdu, V9fsFidState *fidp)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
fidp->fs.dir = s->ops->opendir(&s->ctx, fidp->path.data);
fidp->fs.dir = s->ops->opendir(&s->ctx, &fidp->path);
if (!fidp->fs.dir) {
err = -errno;
} else {
err = 0;
}
});
v9fs_path_unlock(s);
if (!err) {
total_open_fd++;
if (total_open_fd > open_fd_hw) {
v9fs_reclaim_fd(s);
v9fs_reclaim_fd(pdu);
}
}
return err;
}
int v9fs_co_closedir(V9fsState *s, DIR *dir)
int v9fs_co_closedir(V9fsPDU *pdu, DIR *dir)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;;
}
v9fs_co_run_in_worker(
{
err = s->ops->closedir(&s->ctx, dir);

110
hw/9pfs/cofile.c
View File

@ -17,24 +17,34 @@
#include "qemu-coroutine.h"
#include "virtio-9p-coth.h"
int v9fs_co_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
int v9fs_co_lstat(V9fsPDU *pdu, V9fsPath *path, struct stat *stbuf)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->lstat(&s->ctx, path->data, stbuf);
err = s->ops->lstat(&s->ctx, path, stbuf);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_fstat(V9fsState *s, int fd, struct stat *stbuf)
int v9fs_co_fstat(V9fsPDU *pdu, int fd, struct stat *stbuf)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->fstat(&s->ctx, fd, stbuf);
@ -45,59 +55,96 @@ int v9fs_co_fstat(V9fsState *s, int fd, struct stat *stbuf)
return err;
}
int v9fs_co_open(V9fsState *s, V9fsFidState *fidp, int flags)
int v9fs_co_open(V9fsPDU *pdu, V9fsFidState *fidp, int flags)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
fidp->fs.fd = s->ops->open(&s->ctx, fidp->path.data, flags);
fidp->fs.fd = s->ops->open(&s->ctx, &fidp->path, flags);
if (fidp->fs.fd == -1) {
err = -errno;
} else {
err = 0;
}
});
v9fs_path_unlock(s);
if (!err) {
total_open_fd++;
if (total_open_fd > open_fd_hw) {
v9fs_reclaim_fd(s);
v9fs_reclaim_fd(pdu);
}
}
return err;
}
int v9fs_co_open2(V9fsState *s, V9fsFidState *fidp, char *fullname, gid_t gid,
int flags, int mode)
int v9fs_co_open2(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name, gid_t gid,
int flags, int mode, struct stat *stbuf)
{
int err;
FsCred cred;
V9fsPath path;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
cred_init(&cred);
cred.fc_mode = mode & 07777;
cred.fc_uid = fidp->uid;
cred.fc_gid = gid;
/*
* Hold the directory fid lock so that directory path name
* don't change. Read lock is fine because this fid cannot
* be used by any other operation.
*/
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
fidp->fs.fd = s->ops->open2(&s->ctx, fullname, flags, &cred);
err = 0;
fidp->fs.fd = s->ops->open2(&s->ctx, &fidp->path,
name->data, flags, &cred);
if (fidp->fs.fd == -1) {
err = -errno;
} else {
v9fs_path_init(&path);
err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
if (!err) {
err = s->ops->lstat(&s->ctx, &path, stbuf);
if (err < 0) {
err = -errno;
s->ops->close(&s->ctx, fidp->fs.fd);
} else {
v9fs_path_copy(&fidp->path, &path);
}
} else {
s->ops->close(&s->ctx, fidp->fs.fd);
}
v9fs_path_free(&path);
}
});
v9fs_path_unlock(s);
if (!err) {
total_open_fd++;
if (total_open_fd > open_fd_hw) {
v9fs_reclaim_fd(s);
v9fs_reclaim_fd(pdu);
}
}
return err;
}
int v9fs_co_close(V9fsState *s, int fd)
int v9fs_co_close(V9fsPDU *pdu, int fd)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->close(&s->ctx, fd);
@ -111,11 +158,14 @@ int v9fs_co_close(V9fsState *s, int fd)
return err;
}
int v9fs_co_fsync(V9fsState *s, V9fsFidState *fidp, int datasync)
int v9fs_co_fsync(V9fsPDU *pdu, V9fsFidState *fidp, int datasync)
{
int fd;
int err;
int fd, err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
fd = fidp->fs.fd;
v9fs_co_run_in_worker(
{
@ -127,26 +177,37 @@ int v9fs_co_fsync(V9fsState *s, V9fsFidState *fidp, int datasync)
return err;
}
int v9fs_co_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
int v9fs_co_link(V9fsPDU *pdu, V9fsFidState *oldfid,
V9fsFidState *newdirfid, V9fsString *name)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->link(&s->ctx, oldpath->data, newpath->data);
err = s->ops->link(&s->ctx, &oldfid->path,
&newdirfid->path, name->data);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_pwritev(V9fsState *s, V9fsFidState *fidp,
int v9fs_co_pwritev(V9fsPDU *pdu, V9fsFidState *fidp,
struct iovec *iov, int iovcnt, int64_t offset)
{
int fd;
int err;
int fd, err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
fd = fidp->fs.fd;
v9fs_co_run_in_worker(
{
@ -158,12 +219,15 @@ int v9fs_co_pwritev(V9fsState *s, V9fsFidState *fidp,
return err;
}
int v9fs_co_preadv(V9fsState *s, V9fsFidState *fidp,
int v9fs_co_preadv(V9fsPDU *pdu, V9fsFidState *fidp,
struct iovec *iov, int iovcnt, int64_t offset)
{
int fd;
int err;
int fd, err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
fd = fidp->fs.fd;
v9fs_co_run_in_worker(
{

203
hw/9pfs/cofs.c
View File

@ -17,15 +17,20 @@
#include "qemu-coroutine.h"
#include "virtio-9p-coth.h"
int v9fs_co_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
int v9fs_co_readlink(V9fsPDU *pdu, V9fsPath *path, V9fsString *buf)
{
int err;
ssize_t len;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
buf->data = g_malloc(PATH_MAX);
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
len = s->ops->readlink(&s->ctx, path->data,
len = s->ops->readlink(&s->ctx, path,
buf->data, PATH_MAX - 1);
if (len > -1) {
buf->size = len;
@ -35,6 +40,7 @@ int v9fs_co_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
err = -errno;
}
});
v9fs_path_unlock(s);
if (err) {
g_free(buf->data);
buf->data = NULL;
@ -43,109 +49,162 @@ int v9fs_co_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
return err;
}
int v9fs_co_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
int v9fs_co_statfs(V9fsPDU *pdu, V9fsPath *path, struct statfs *stbuf)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->statfs(&s->ctx, path->data, stbuf);
err = s->ops->statfs(&s->ctx, path, stbuf);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_chmod(V9fsState *s, V9fsString *path, mode_t mode)
int v9fs_co_chmod(V9fsPDU *pdu, V9fsPath *path, mode_t mode)
{
int err;
FsCred cred;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
cred_init(&cred);
cred.fc_mode = mode;
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->chmod(&s->ctx, path->data, &cred);
err = s->ops->chmod(&s->ctx, path, &cred);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_utimensat(V9fsState *s, V9fsString *path,
int v9fs_co_utimensat(V9fsPDU *pdu, V9fsPath *path,
struct timespec times[2])
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->utimensat(&s->ctx, path->data, times);
err = s->ops->utimensat(&s->ctx, path, times);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
int v9fs_co_chown(V9fsPDU *pdu, V9fsPath *path, uid_t uid, gid_t gid)
{
int err;
FsCred cred;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
cred_init(&cred);
cred.fc_uid = uid;
cred.fc_gid = gid;
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->chown(&s->ctx, path->data, &cred);
err = s->ops->chown(&s->ctx, path, &cred);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_truncate(V9fsState *s, V9fsString *path, off_t size)
int v9fs_co_truncate(V9fsPDU *pdu, V9fsPath *path, off_t size)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->truncate(&s->ctx, path->data, size);
err = s->ops->truncate(&s->ctx, path, size);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_mknod(V9fsState *s, V9fsString *path, uid_t uid,
gid_t gid, dev_t dev, mode_t mode)
int v9fs_co_mknod(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name, uid_t uid,
gid_t gid, dev_t dev, mode_t mode, struct stat *stbuf)
{
int err;
V9fsPath path;
FsCred cred;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
cred_init(&cred);
cred.fc_uid = uid;
cred.fc_gid = gid;
cred.fc_mode = mode;
cred.fc_rdev = dev;
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->mknod(&s->ctx, path->data, &cred);
err = s->ops->mknod(&s->ctx, &fidp->path, name->data, &cred);
if (err < 0) {
err = -errno;
} else {
v9fs_path_init(&path);
err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
if (!err) {
err = s->ops->lstat(&s->ctx, &path, stbuf);
if (err < 0) {
err = -errno;
}
}
v9fs_path_free(&path);
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_remove(V9fsState *s, V9fsString *path)
/* Only works with path name based fid */
int v9fs_co_remove(V9fsPDU *pdu, V9fsPath *path)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->remove(&s->ctx, path->data);
@ -153,13 +212,39 @@ int v9fs_co_remove(V9fsState *s, V9fsString *path)
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_rename(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
int v9fs_co_unlinkat(V9fsPDU *pdu, V9fsPath *path, V9fsString *name, int flags)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->unlinkat(&s->ctx, path, name->data, flags);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
/* Only work with path name based fid */
int v9fs_co_rename(V9fsPDU *pdu, V9fsPath *oldpath, V9fsPath *newpath)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->rename(&s->ctx, oldpath->data, newpath->data);
@ -170,22 +255,90 @@ int v9fs_co_rename(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
return err;
}
int v9fs_co_symlink(V9fsState *s, V9fsFidState *fidp,
const char *oldpath, const char *newpath, gid_t gid)
int v9fs_co_renameat(V9fsPDU *pdu, V9fsPath *olddirpath, V9fsString *oldname,
V9fsPath *newdirpath, V9fsString *newname)
{
int err;
FsCred cred;
V9fsState *s = pdu->s;
cred_init(&cred);
cred.fc_uid = fidp->uid;
cred.fc_gid = gid;
cred.fc_mode = 0777;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
err = s->ops->renameat(&s->ctx, olddirpath, oldname->data,
newdirpath, newname->data);
if (err < 0) {
err = -errno;
}
});
return err;
}
int v9fs_co_symlink(V9fsPDU *pdu, V9fsFidState *dfidp, V9fsString *name,
const char *oldpath, gid_t gid, struct stat *stbuf)
{
int err;
FsCred cred;
V9fsPath path;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
cred_init(&cred);
cred.fc_uid = dfidp->uid;
cred.fc_gid = gid;
cred.fc_mode = 0777;
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->symlink(&s->ctx, oldpath, &dfidp->path,
name->data, &cred);
if (err < 0) {
err = -errno;
} else {
v9fs_path_init(&path);
err = v9fs_name_to_path(s, &dfidp->path, name->data, &path);
if (!err) {
err = s->ops->lstat(&s->ctx, &path, stbuf);
if (err < 0) {
err = -errno;
}
}
v9fs_path_free(&path);
}
});
v9fs_path_unlock(s);
return err;
}
/*
* For path name based fid we don't block. So we can
* directly call the fs driver ops.
*/
int v9fs_co_name_to_path(V9fsPDU *pdu, V9fsPath *dirpath,
const char *name, V9fsPath *path)
{
int err;
V9fsState *s = pdu->s;
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
err = s->ops->name_to_path(&s->ctx, dirpath, name, path);
if (err < 0) {
err = -errno;
}
} else {
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_co_run_in_worker(
{
err = s->ops->name_to_path(&s->ctx, dirpath, name, path);
if (err < 0) {
err = -errno;
}
});
}
return err;
}

41
hw/9pfs/coxattr.c
View File

@ -17,68 +17,91 @@
#include "qemu-coroutine.h"
#include "virtio-9p-coth.h"
int v9fs_co_llistxattr(V9fsState *s, V9fsString *path, void *value, size_t size)
int v9fs_co_llistxattr(V9fsPDU *pdu, V9fsPath *path, void *value, size_t size)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->llistxattr(&s->ctx, path->data, value, size);
err = s->ops->llistxattr(&s->ctx, path, value, size);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_lgetxattr(V9fsState *s, V9fsString *path,
int v9fs_co_lgetxattr(V9fsPDU *pdu, V9fsPath *path,
V9fsString *xattr_name,
void *value, size_t size)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->lgetxattr(&s->ctx, path->data,
err = s->ops->lgetxattr(&s->ctx, path,
xattr_name->data,
value, size);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_lsetxattr(V9fsState *s, V9fsString *path,
int v9fs_co_lsetxattr(V9fsPDU *pdu, V9fsPath *path,
V9fsString *xattr_name, void *value,
size_t size, int flags)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->lsetxattr(&s->ctx, path->data,
err = s->ops->lsetxattr(&s->ctx, path,
xattr_name->data, value,
size, flags);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}
int v9fs_co_lremovexattr(V9fsState *s, V9fsString *path,
int v9fs_co_lremovexattr(V9fsPDU *pdu, V9fsPath *path,
V9fsString *xattr_name)
{
int err;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ops->lremovexattr(&s->ctx, path->data,
xattr_name->data);
err = s->ops->lremovexattr(&s->ctx, path, xattr_name->data);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
return err;
}

72
hw/9pfs/virtio-9p-coth.h
View File

@ -56,41 +56,49 @@ typedef struct V9fsThPool {
extern void co_run_in_worker_bh(void *);
extern int v9fs_init_worker_threads(void);
extern int v9fs_co_readlink(V9fsState *, V9fsString *, V9fsString *);
extern int v9fs_co_readdir_r(V9fsState *, V9fsFidState *,
extern int v9fs_co_readlink(V9fsPDU *, V9fsPath *, V9fsString *);
extern int v9fs_co_readdir_r(V9fsPDU *, V9fsFidState *,
struct dirent *, struct dirent **result);
extern off_t v9fs_co_telldir(V9fsState *, V9fsFidState *);
extern void v9fs_co_seekdir(V9fsState *, V9fsFidState *, off_t);
extern void v9fs_co_rewinddir(V9fsState *, V9fsFidState *);
extern int v9fs_co_statfs(V9fsState *, V9fsString *, struct statfs *);
extern int v9fs_co_lstat(V9fsState *, V9fsString *, struct stat *);
extern int v9fs_co_chmod(V9fsState *, V9fsString *, mode_t);
extern int v9fs_co_utimensat(V9fsState *, V9fsString *, struct timespec [2]);
extern int v9fs_co_chown(V9fsState *, V9fsString *, uid_t, gid_t);
extern int v9fs_co_truncate(V9fsState *, V9fsString *, off_t);
extern int v9fs_co_llistxattr(V9fsState *, V9fsString *, void *, size_t);
extern int v9fs_co_lgetxattr(V9fsState *, V9fsString *,
extern off_t v9fs_co_telldir(V9fsPDU *, V9fsFidState *);
extern void v9fs_co_seekdir(V9fsPDU *, V9fsFidState *, off_t);
extern void v9fs_co_rewinddir(V9fsPDU *, V9fsFidState *);
extern int v9fs_co_statfs(V9fsPDU *, V9fsPath *, struct statfs *);
extern int v9fs_co_lstat(V9fsPDU *, V9fsPath *, struct stat *);
extern int v9fs_co_chmod(V9fsPDU *, V9fsPath *, mode_t);
extern int v9fs_co_utimensat(V9fsPDU *, V9fsPath *, struct timespec [2]);
extern int v9fs_co_chown(V9fsPDU *, V9fsPath *, uid_t, gid_t);
extern int v9fs_co_truncate(V9fsPDU *, V9fsPath *, off_t);
extern int v9fs_co_llistxattr(V9fsPDU *, V9fsPath *, void *, size_t);
extern int v9fs_co_lgetxattr(V9fsPDU *, V9fsPath *,
V9fsString *, void *, size_t);
extern int v9fs_co_mknod(V9fsState *, V9fsString *, uid_t,
gid_t, dev_t, mode_t);
extern int v9fs_co_mkdir(V9fsState *, char *, mode_t, uid_t, gid_t);
extern int v9fs_co_remove(V9fsState *, V9fsString *);
extern int v9fs_co_rename(V9fsState *, V9fsString *, V9fsString *);
extern int v9fs_co_fstat(V9fsState *, int, struct stat *);
extern int v9fs_co_opendir(V9fsState *, V9fsFidState *);
extern int v9fs_co_open(V9fsState *, V9fsFidState *, int);
extern int v9fs_co_open2(V9fsState *, V9fsFidState *, char *, gid_t, int, int);
extern int v9fs_co_lsetxattr(V9fsState *, V9fsString *, V9fsString *,
extern int v9fs_co_mknod(V9fsPDU *, V9fsFidState *, V9fsString *, uid_t,
gid_t, dev_t, mode_t, struct stat *);
extern int v9fs_co_mkdir(V9fsPDU *, V9fsFidState *, V9fsString *,
mode_t, uid_t, gid_t, struct stat *);
extern int v9fs_co_remove(V9fsPDU *, V9fsPath *);
extern int v9fs_co_rename(V9fsPDU *, V9fsPath *, V9fsPath *);
extern int v9fs_co_unlinkat(V9fsPDU *, V9fsPath *, V9fsString *, int flags);
extern int v9fs_co_renameat(V9fsPDU *, V9fsPath *, V9fsString *,
V9fsPath *, V9fsString *);
extern int v9fs_co_fstat(V9fsPDU *, int, struct stat *);
extern int v9fs_co_opendir(V9fsPDU *, V9fsFidState *);
extern int v9fs_co_open(V9fsPDU *, V9fsFidState *, int);
extern int v9fs_co_open2(V9fsPDU *, V9fsFidState *, V9fsString *,
gid_t, int, int, struct stat *);
extern int v9fs_co_lsetxattr(V9fsPDU *, V9fsPath *, V9fsString *,
void *, size_t, int);
extern int v9fs_co_lremovexattr(V9fsState *, V9fsString *, V9fsString *);
extern int v9fs_co_closedir(V9fsState *, DIR *);
extern int v9fs_co_close(V9fsState *, int);
extern int v9fs_co_fsync(V9fsState *, V9fsFidState *, int);
extern int v9fs_co_symlink(V9fsState *, V9fsFidState *, const char *,
const char *, gid_t);
extern int v9fs_co_link(V9fsState *, V9fsString *, V9fsString *);
extern int v9fs_co_pwritev(V9fsState *, V9fsFidState *,
extern int v9fs_co_lremovexattr(V9fsPDU *, V9fsPath *, V9fsString *);
extern int v9fs_co_closedir(V9fsPDU *, DIR *);
extern int v9fs_co_close(V9fsPDU *, int);
extern int v9fs_co_fsync(V9fsPDU *, V9fsFidState *, int);
extern int v9fs_co_symlink(V9fsPDU *, V9fsFidState *, V9fsString *,
const char *, gid_t, struct stat *);
extern int v9fs_co_link(V9fsPDU *, V9fsFidState *,
V9fsFidState *, V9fsString *);
extern int v9fs_co_pwritev(V9fsPDU *, V9fsFidState *,
struct iovec *, int, int64_t);
extern int v9fs_co_preadv(V9fsState *, V9fsFidState *,
extern int v9fs_co_preadv(V9fsPDU *, V9fsFidState *,
struct iovec *, int, int64_t);
extern int v9fs_co_name_to_path(V9fsPDU *, V9fsPath *,
const char *, V9fsPath *);
#endif

10
hw/9pfs/virtio-9p-device.c
View File

@ -45,7 +45,7 @@ static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
}
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
{
{
V9fsState *s;
int i, len;
struct stat stat;
@ -58,6 +58,7 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
sizeof(V9fsState));
/* initialize pdu allocator */
QLIST_INIT(&s->free_list);
QLIST_INIT(&s->active_list);
for (i = 0; i < (MAX_REQ - 1); i++) {
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
}
@ -124,6 +125,7 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
memcpy(s->tag, conf->tag, len);
s->tag_len = len;
s->ctx.uid = -1;
s->ctx.flags = 0;
s->ops = fse->ops;
s->vdev.get_features = virtio_9p_get_features;
@ -131,7 +133,13 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
s->tag_len;
s->vdev.get_config = virtio_9p_get_config;
s->fid_list = NULL;
qemu_co_rwlock_init(&s->rename_lock);
if (s->ops->init(&s->ctx) < 0) {
fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s"
" and export path:%s\n", conf->fsdev_id, s->ctx.fs_root);
exit(1);
}
if (v9fs_init_worker_threads() < 0) {
fprintf(stderr, "worker thread initialization failed\n");
exit(1);

611
hw/9pfs/virtio-9p-handle.c Normal file
View File

@ -0,0 +1,611 @@
/*
* Virtio 9p handle callback
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "hw/virtio.h"
#include "virtio-9p.h"
#include "virtio-9p-xattr.h"
#include <arpa/inet.h>
#include <pwd.h>
#include <grp.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <attr/xattr.h>
#include <unistd.h>
struct handle_data {
int mountfd;
int handle_bytes;
};
#if __GLIBC__ <= 2 && __GLIBC_MINOR__ < 14
struct file_handle {
unsigned int handle_bytes;
int handle_type;
unsigned char handle[0];
};
#endif
#ifndef AT_EMPTY_PATH
#define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */
#endif
#ifndef O_PATH
#define O_PATH 010000000
#endif
#ifndef __NR_name_to_handle_at
#if defined(__i386__)
#define __NR_name_to_handle_at 341
#define __NR_open_by_handle_at 342
#elif defined(__x86_64__)
#define __NR_name_to_handle_at 303
#define __NR_open_by_handle_at 304
#endif
#endif
#ifdef __NR_name_to_handle_at
static inline int name_to_handle(int dirfd, const char *name,
struct file_handle *fh, int *mnt_id, int flags)
{
return syscall(__NR_name_to_handle_at, dirfd, name, fh, mnt_id, flags);
}
static inline int open_by_handle(int mountfd, const char *fh, int flags)
{
return syscall(__NR_open_by_handle_at, mountfd, fh, flags);
}
#else
static inline int name_to_handle(int dirfd, const char *name,
struct file_handle *fh, int *mnt_id, int flags)
{
errno = ENOSYS;
return -1;
}
static inline int open_by_handle(int mountfd, const char *fh, int flags)
{
errno = ENOSYS;
return -1;
}
#endif
static int handle_update_file_cred(int dirfd, const char *name, FsCred *credp)
{
int fd, ret;
fd = openat(dirfd, name, O_NONBLOCK | O_NOFOLLOW);;
if (fd < 0) {
return fd;
}
ret = fchmod(fd, credp->fc_mode & 07777);
if (ret < 0) {
goto err_out;
}
ret = fchownat(fd, "", credp->fc_uid, credp->fc_gid, AT_EMPTY_PATH);
err_out:
close(fd);
return ret;
}
static int handle_lstat(FsContext *fs_ctx, V9fsPath *fs_path,
struct stat *stbuf)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_PATH);
if (fd < 0) {
return fd;
}
ret = fstatat(fd, "", stbuf, AT_EMPTY_PATH);
close(fd);
return ret;
}
static ssize_t handle_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
char *buf, size_t bufsz)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_PATH);
if (fd < 0) {
return fd;
}
ret = readlinkat(fd, "", buf, bufsz);
close(fd);
return ret;
}
static int handle_close(FsContext *ctx, int fd)
{
return close(fd);
}
static int handle_closedir(FsContext *ctx, DIR *dir)
{
return closedir(dir);
}
static int handle_open(FsContext *ctx, V9fsPath *fs_path, int flags)
{
struct handle_data *data = (struct handle_data *)ctx->private;
return open_by_handle(data->mountfd, fs_path->data, flags);
}
static DIR *handle_opendir(FsContext *ctx, V9fsPath *fs_path)
{
int fd;
fd = handle_open(ctx, fs_path, O_DIRECTORY);
if (fd < 0) {
return NULL;
}
return fdopendir(fd);
}
static void handle_rewinddir(FsContext *ctx, DIR *dir)
{
return rewinddir(dir);
}
static off_t handle_telldir(FsContext *ctx, DIR *dir)
{
return telldir(dir);
}
static int handle_readdir_r(FsContext *ctx, DIR *dir, struct dirent *entry,
struct dirent **result)
{
return readdir_r(dir, entry, result);
}
static void handle_seekdir(FsContext *ctx, DIR *dir, off_t off)
{
return seekdir(dir, off);
}
static ssize_t handle_preadv(FsContext *ctx, int fd, const struct iovec *iov,
int iovcnt, off_t offset)
{
#ifdef CONFIG_PREADV
return preadv(fd, iov, iovcnt, offset);
#else
int err = lseek(fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
return readv(fd, iov, iovcnt);
}
#endif
}
static ssize_t handle_pwritev(FsContext *ctx, int fd, const struct iovec *iov,
int iovcnt, off_t offset)
{
#ifdef CONFIG_PREADV
return pwritev(fd, iov, iovcnt, offset);
#else
int err = lseek(fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
return writev(fd, iov, iovcnt);
}
#endif
}
static int handle_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = fchmod(fd, credp->fc_mode);
close(fd);
return ret;
}
static int handle_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
int dirfd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
if (dirfd < 0) {
return dirfd;
}
ret = mknodat(dirfd, name, credp->fc_mode, credp->fc_rdev);
if (!ret) {
ret = handle_update_file_cred(dirfd, name, credp);
}
close(dirfd);
return ret;
}
static int handle_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
int dirfd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
if (dirfd < 0) {
return dirfd;
}
ret = mkdirat(dirfd, name, credp->fc_mode);
if (!ret) {
ret = handle_update_file_cred(dirfd, name, credp);
}
close(dirfd);
return ret;
}
static int handle_fstat(FsContext *fs_ctx, int fd, struct stat *stbuf)
{
return fstat(fd, stbuf);
}
static int handle_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int flags, FsCred *credp)
{
int ret;
int dirfd, fd;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
if (dirfd < 0) {
return dirfd;
}
fd = openat(dirfd, name, flags | O_NOFOLLOW, credp->fc_mode);
if (fd >= 0) {
ret = handle_update_file_cred(dirfd, name, credp);
if (ret < 0) {
close(fd);
fd = ret;
}
}
close(dirfd);
return fd;
}
static int handle_symlink(FsContext *fs_ctx, const char *oldpath,
V9fsPath *dir_path, const char *name, FsCred *credp)
{
int fd, dirfd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
if (dirfd < 0) {
return dirfd;
}
ret = symlinkat(oldpath, dirfd, name);
if (!ret) {
fd = openat(dirfd, name, O_PATH | O_NOFOLLOW);
if (fd < 0) {
ret = fd;
goto err_out;
}
ret = fchownat(fd, "", credp->fc_uid, credp->fc_gid, AT_EMPTY_PATH);
close(fd);
}
err_out:
close(dirfd);
return ret;
}
static int handle_link(FsContext *ctx, V9fsPath *oldpath,
V9fsPath *dirpath, const char *name)
{
int oldfd, newdirfd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
oldfd = open_by_handle(data->mountfd, oldpath->data, O_PATH);
if (oldfd < 0) {
return oldfd;
}
newdirfd = open_by_handle(data->mountfd, dirpath->data, O_PATH);
if (newdirfd < 0) {
close(oldfd);
return newdirfd;
}
ret = linkat(oldfd, "", newdirfd, name, AT_EMPTY_PATH);
close(newdirfd);
close(oldfd);
return ret;
}
static int handle_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK | O_WRONLY);
if (fd < 0) {
return fd;
}
ret = ftruncate(fd, size);
close(fd);
return ret;
}
static int handle_rename(FsContext *ctx, const char *oldpath,
const char *newpath)
{
errno = EOPNOTSUPP;
return -1;
}
static int handle_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)fs_ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_PATH);
if (fd < 0) {
return fd;
}
ret = fchownat(fd, "", credp->fc_uid, credp->fc_gid, AT_EMPTY_PATH);
close(fd);
return ret;
}
static int handle_utimensat(FsContext *ctx, V9fsPath *fs_path,
const struct timespec *buf)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = futimens(fd, buf);
close(fd);
return ret;
}
static int handle_remove(FsContext *ctx, const char *path)
{
errno = EOPNOTSUPP;
return -1;
}
static int handle_fsync(FsContext *ctx, int fd, int datasync)
{
if (datasync) {
return qemu_fdatasync(fd);
} else {
return fsync(fd);
}
}
static int handle_statfs(FsContext *ctx, V9fsPath *fs_path,
struct statfs *stbuf)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = fstatfs(fd, stbuf);
close(fd);
return ret;
}
static ssize_t handle_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
const char *name, void *value, size_t size)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = fgetxattr(fd, name, value, size);
close(fd);
return ret;
}
static ssize_t handle_llistxattr(FsContext *ctx, V9fsPath *fs_path,
void *value, size_t size)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = flistxattr(fd, value, size);
close(fd);
return ret;
}
static int handle_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name,
void *value, size_t size, int flags)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = fsetxattr(fd, name, value, size, flags);
close(fd);
return ret;
}
static int handle_lremovexattr(FsContext *ctx, V9fsPath *fs_path,
const char *name)
{
int fd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
fd = open_by_handle(data->mountfd, fs_path->data, O_NONBLOCK);
if (fd < 0) {
return fd;
}
ret = fremovexattr(fd, name);
close(fd);
return ret;
}
static int handle_name_to_path(FsContext *ctx, V9fsPath *dir_path,
const char *name, V9fsPath *target)
{
char buffer[PATH_MAX];
struct file_handle *fh;
int dirfd, ret, mnt_id;
struct handle_data *data = (struct handle_data *)ctx->private;
/* "." and ".." are not allowed */
if (!strcmp(name, ".") || !strcmp(name, "..")) {
errno = EINVAL;
return -1;
}
if (dir_path) {
dirfd = open_by_handle(data->mountfd, dir_path->data, O_PATH);
} else {
/* relative to export root */
dirfd = open(rpath(ctx, ".", buffer), O_DIRECTORY);
}
if (dirfd < 0) {
return dirfd;
}
fh = g_malloc(sizeof(struct file_handle) + data->handle_bytes);
fh->handle_bytes = data->handle_bytes;
/* add a "./" at the begining of the path */
snprintf(buffer, PATH_MAX, "./%s", name);
/* flag = 0 imply don't follow symlink */
ret = name_to_handle(dirfd, buffer, fh, &mnt_id, 0);
if (!ret) {
target->data = (char *)fh;
target->size = sizeof(struct file_handle) + data->handle_bytes;
} else {
g_free(fh);
}
close(dirfd);
return ret;
}
static int handle_renameat(FsContext *ctx, V9fsPath *olddir,
const char *old_name, V9fsPath *newdir,
const char *new_name)
{
int olddirfd, newdirfd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
olddirfd = open_by_handle(data->mountfd, olddir->data, O_PATH);
if (olddirfd < 0) {
return olddirfd;
}
newdirfd = open_by_handle(data->mountfd, newdir->data, O_PATH);
if (newdirfd < 0) {
close(olddirfd);
return newdirfd;
}
ret = renameat(olddirfd, old_name, newdirfd, new_name);
close(newdirfd);
close(olddirfd);
return ret;
}
static int handle_unlinkat(FsContext *ctx, V9fsPath *dir,
const char *name, int flags)
{
int dirfd, ret;
struct handle_data *data = (struct handle_data *)ctx->private;
dirfd = open_by_handle(data->mountfd, dir->data, O_PATH);
if (dirfd < 0) {
return dirfd;
}
ret = unlinkat(dirfd, name, flags);
close(dirfd);
return ret;
}
static int handle_init(FsContext *ctx)
{
int ret, mnt_id;
struct file_handle fh;
struct handle_data *data = g_malloc(sizeof(struct handle_data));
data->mountfd = open(ctx->fs_root, O_DIRECTORY);
if (data->mountfd < 0) {
ret = data->mountfd;
goto err_out;
}
memset(&fh, 0, sizeof(struct file_handle));
ret = name_to_handle(data->mountfd, ".", &fh, &mnt_id, 0);
if (ret && errno == EOVERFLOW) {
data->handle_bytes = fh.handle_bytes;
ctx->private = data;
ret = 0;
goto out;
}
/* we got 0 byte handle ? */
ret = -1;
close(data->mountfd);
err_out:
g_free(data);
out:
return ret;
}
FileOperations handle_ops = {
.init = handle_init,
.lstat = handle_lstat,
.readlink = handle_readlink,
.close = handle_close,
.closedir = handle_closedir,
.open = handle_open,
.opendir = handle_opendir,
.rewinddir = handle_rewinddir,
.telldir = handle_telldir,
.readdir_r = handle_readdir_r,
.seekdir = handle_seekdir,
.preadv = handle_preadv,
.pwritev = handle_pwritev,
.chmod = handle_chmod,
.mknod = handle_mknod,
.mkdir = handle_mkdir,
.fstat = handle_fstat,
.open2 = handle_open2,
.symlink = handle_symlink,
.link = handle_link,
.truncate = handle_truncate,
.rename = handle_rename,
.chown = handle_chown,
.utimensat = handle_utimensat,
.remove = handle_remove,
.fsync = handle_fsync,
.statfs = handle_statfs,
.lgetxattr = handle_lgetxattr,
.llistxattr = handle_llistxattr,
.lsetxattr = handle_lsetxattr,
.lremovexattr = handle_lremovexattr,
.name_to_path = handle_name_to_path,
.renameat = handle_renameat,
.unlinkat = handle_unlinkat,
};

213
hw/9pfs/virtio-9p-local.c
View File

@ -21,11 +21,12 @@
#include <sys/un.h>
#include <attr/xattr.h>
static int local_lstat(FsContext *fs_ctx, const char *path, struct stat *stbuf)
static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf)
{
int err;
char buffer[PATH_MAX];
char *path = fs_path->data;
err = lstat(rpath(fs_ctx, path, buffer), stbuf);
if (err) {
return err;
@ -59,6 +60,7 @@ static int local_lstat(FsContext *fs_ctx, const char *path, struct stat *stbuf)
static int local_set_xattr(const char *path, FsCred *credp)
{
int err;
if (credp->fc_uid != -1) {
err = setxattr(path, "user.virtfs.uid", &credp->fc_uid, sizeof(uid_t),
0);
@ -91,9 +93,10 @@ static int local_set_xattr(const char *path, FsCred *credp)
}
static int local_post_create_passthrough(FsContext *fs_ctx, const char *path,
FsCred *credp)
FsCred *credp)
{
char buffer[PATH_MAX];
if (chmod(rpath(fs_ctx, path, buffer), credp->fc_mode & 07777) < 0) {
return -1;
}
@ -110,11 +113,13 @@ static int local_post_create_passthrough(FsContext *fs_ctx, const char *path,
return 0;
}
static ssize_t local_readlink(FsContext *fs_ctx, const char *path,
char *buf, size_t bufsz)
static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
char *buf, size_t bufsz)
{
ssize_t tsize = -1;
char buffer[PATH_MAX];
char *path = fs_path->data;
if (fs_ctx->fs_sm == SM_MAPPED) {
int fd;
fd = open(rpath(fs_ctx, path, buffer), O_RDONLY);
@ -143,15 +148,19 @@ static int local_closedir(FsContext *ctx, DIR *dir)
return closedir(dir);
}
static int local_open(FsContext *ctx, const char *path, int flags)
static int local_open(FsContext *ctx, V9fsPath *fs_path, int flags)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
return open(rpath(ctx, path, buffer), flags);
}
static DIR *local_opendir(FsContext *ctx, const char *path)
static DIR *local_opendir(FsContext *ctx, V9fsPath *fs_path)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
return opendir(rpath(ctx, path, buffer));
}
@ -166,7 +175,7 @@ static off_t local_telldir(FsContext *ctx, DIR *dir)
}
static int local_readdir_r(FsContext *ctx, DIR *dir, struct dirent *entry,
struct dirent **result)
struct dirent **result)
{
return readdir_r(dir, entry, result);
}
@ -192,7 +201,7 @@ static ssize_t local_preadv(FsContext *ctx, int fd, const struct iovec *iov,
}
static ssize_t local_pwritev(FsContext *ctx, int fd, const struct iovec *iov,
int iovcnt, off_t offset)
int iovcnt, off_t offset)
{
#ifdef CONFIG_PREADV
return pwritev(fd, iov, iovcnt, offset);
@ -206,9 +215,11 @@ static ssize_t local_pwritev(FsContext *ctx, int fd, const struct iovec *iov,
#endif
}
static int local_chmod(FsContext *fs_ctx, const char *path, FsCred *credp)
static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
if (fs_ctx->fs_sm == SM_MAPPED) {
return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
} else if ((fs_ctx->fs_sm == SM_PASSTHROUGH) ||
@ -218,18 +229,25 @@ static int local_chmod(FsContext *fs_ctx, const char *path, FsCred *credp)
return -1;
}
static int local_mknod(FsContext *fs_ctx, const char *path, FsCred *credp)
static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
char *path;
int err = -1;
int serrno = 0;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->fs_sm == SM_MAPPED) {
err = mknod(rpath(fs_ctx, path, buffer),
SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
return err;
goto out;
}
local_set_xattr(rpath(fs_ctx, path, buffer), credp);
if (err == -1) {
@ -241,7 +259,7 @@ static int local_mknod(FsContext *fs_ctx, const char *path, FsCred *credp)
err = mknod(rpath(fs_ctx, path, buffer), credp->fc_mode,
credp->fc_rdev);
if (err == -1) {
return err;
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
@ -249,25 +267,34 @@ static int local_mknod(FsContext *fs_ctx, const char *path, FsCred *credp)
goto err_end;
}
}
return err;
goto out;
err_end:
remove(rpath(fs_ctx, path, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
static int local_mkdir(FsContext *fs_ctx, const char *path, FsCred *credp)
static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
char *path;
int err = -1;
int serrno = 0;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->fs_sm == SM_MAPPED) {
err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS);
if (err == -1) {
return err;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFDIR;
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
@ -279,7 +306,7 @@ static int local_mkdir(FsContext *fs_ctx, const char *path, FsCred *credp)
(fs_ctx->fs_sm == SM_NONE)) {
err = mkdir(rpath(fs_ctx, path, buffer), credp->fc_mode);
if (err == -1) {
return err;
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
@ -287,11 +314,13 @@ static int local_mkdir(FsContext *fs_ctx, const char *path, FsCred *credp)
goto err_end;
}
}
return err;
goto out;
err_end:
remove(rpath(fs_ctx, path, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
@ -325,19 +354,26 @@ static int local_fstat(FsContext *fs_ctx, int fd, struct stat *stbuf)
return err;
}
static int local_open2(FsContext *fs_ctx, const char *path, int flags,
FsCred *credp)
static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int flags, FsCred *credp)
{
char *path;
int fd = -1;
int err = -1;
int serrno = 0;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->fs_sm == SM_MAPPED) {
fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
return fd;
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set cleint credentials in xattr */
@ -350,7 +386,8 @@ static int local_open2(FsContext *fs_ctx, const char *path, int flags,
(fs_ctx->fs_sm == SM_NONE)) {
fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode);
if (fd == -1) {
return fd;
err = fd;
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
@ -358,23 +395,32 @@ static int local_open2(FsContext *fs_ctx, const char *path, int flags,
goto err_end;
}
}
return fd;
err = fd;
goto out;
err_end:
close(fd);
remove(rpath(fs_ctx, path, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
static int local_symlink(FsContext *fs_ctx, const char *oldpath,
const char *newpath, FsCred *credp)
V9fsPath *dir_path, const char *name, FsCred *credp)
{
int err = -1;
int serrno = 0;
char *newpath;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
newpath = fullname.data;
/* Determine the security model */
if (fs_ctx->fs_sm == SM_MAPPED) {
int fd;
@ -382,7 +428,8 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
fd = open(rpath(fs_ctx, newpath, buffer), O_CREAT|O_EXCL|O_RDWR,
SM_LOCAL_MODE_BITS);
if (fd == -1) {
return fd;
err = fd;
goto out;
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
@ -408,10 +455,10 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
(fs_ctx->fs_sm == SM_NONE)) {
err = symlink(oldpath, rpath(fs_ctx, newpath, buffer));
if (err) {
return err;
goto out;
}
err = lchown(rpath(fs_ctx, newpath, buffer), credp->fc_uid,
credp->fc_gid);
credp->fc_gid);
if (err == -1) {
/*
* If we fail to change ownership and if we are
@ -424,24 +471,37 @@ static int local_symlink(FsContext *fs_ctx, const char *oldpath,
err = 0;
}
}
return err;
goto out;
err_end:
remove(rpath(fs_ctx, newpath, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
static int local_link(FsContext *ctx, const char *oldpath, const char *newpath)
static int local_link(FsContext *ctx, V9fsPath *oldpath,
V9fsPath *dirpath, const char *name)
{
int ret;
V9fsString newpath;
char buffer[PATH_MAX], buffer1[PATH_MAX];
return link(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
v9fs_string_init(&newpath);
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
ret = link(rpath(ctx, oldpath->data, buffer),
rpath(ctx, newpath.data, buffer1));
v9fs_string_free(&newpath);
return ret;
}
static int local_truncate(FsContext *ctx, const char *path, off_t size)
static int local_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
return truncate(rpath(ctx, path, buffer), size);
}
@ -453,9 +513,11 @@ static int local_rename(FsContext *ctx, const char *oldpath,
return rename(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
}
static int local_chown(FsContext *fs_ctx, const char *path, FsCred *credp)
static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
if ((credp->fc_uid == -1 && credp->fc_gid == -1) ||
(fs_ctx->fs_sm == SM_PASSTHROUGH)) {
return lchown(rpath(fs_ctx, path, buffer), credp->fc_uid,
@ -470,12 +532,14 @@ static int local_chown(FsContext *fs_ctx, const char *path, FsCred *credp)
return -1;
}
static int local_utimensat(FsContext *s, const char *path,
static int local_utimensat(FsContext *s, V9fsPath *fs_path,
const struct timespec *buf)
{
char buffer[PATH_MAX];
char *path = fs_path->data;
return qemu_utimensat(AT_FDCWD, rpath(s, path, buffer), buf,
AT_SYMLINK_NOFOLLOW);
AT_SYMLINK_NOFOLLOW);
}
static int local_remove(FsContext *ctx, const char *path)
@ -493,38 +557,102 @@ static int local_fsync(FsContext *ctx, int fd, int datasync)
}
}
static int local_statfs(FsContext *s, const char *path, struct statfs *stbuf)
static int local_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf)
{
char buffer[PATH_MAX];
return statfs(rpath(s, path, buffer), stbuf);
char *path = fs_path->data;
return statfs(rpath(s, path, buffer), stbuf);
}
static ssize_t local_lgetxattr(FsContext *ctx, const char *path,
static ssize_t local_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
const char *name, void *value, size_t size)
{
char *path = fs_path->data;
return v9fs_get_xattr(ctx, path, name, value, size);
}
static ssize_t local_llistxattr(FsContext *ctx, const char *path,
static ssize_t local_llistxattr(FsContext *ctx, V9fsPath *fs_path,
void *value, size_t size)
{
char *path = fs_path->data;
return v9fs_list_xattr(ctx, path, value, size);
}
static int local_lsetxattr(FsContext *ctx, const char *path, const char *name,
static int local_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name,
void *value, size_t size, int flags)
{
char *path = fs_path->data;
return v9fs_set_xattr(ctx, path, name, value, size, flags);
}
static int local_lremovexattr(FsContext *ctx,
const char *path, const char *name)
static int local_lremovexattr(FsContext *ctx, V9fsPath *fs_path,
const char *name)
{
char *path = fs_path->data;
return v9fs_remove_xattr(ctx, path, name);
}
static int local_name_to_path(FsContext *ctx, V9fsPath *dir_path,
const char *name, V9fsPath *target)
{
if (dir_path) {
v9fs_string_sprintf((V9fsString *)target, "%s/%s",
dir_path->data, name);
} else {
v9fs_string_sprintf((V9fsString *)target, "%s", name);
}
/* Bump the size for including terminating NULL */
target->size++;
return 0;
}
static int local_renameat(FsContext *ctx, V9fsPath *olddir,
const char *old_name, V9fsPath *newdir,
const char *new_name)
{
int ret;
V9fsString old_full_name, new_full_name;
v9fs_string_init(&old_full_name);
v9fs_string_init(&new_full_name);
v9fs_string_sprintf(&old_full_name, "%s/%s", olddir->data, old_name);
v9fs_string_sprintf(&new_full_name, "%s/%s", newdir->data, new_name);
ret = local_rename(ctx, old_full_name.data, new_full_name.data);
v9fs_string_free(&old_full_name);
v9fs_string_free(&new_full_name);
return ret;
}
static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
const char *name, int flags)
{
int ret;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
ret = remove(rpath(ctx, fullname.data, buffer));
v9fs_string_free(&fullname);
return ret;
}
static int local_init(FsContext *ctx)
{
ctx->flags |= PATHNAME_FSCONTEXT;
return 0;
}
FileOperations local_ops = {
.init = local_init,
.lstat = local_lstat,
.readlink = local_readlink,
.close = local_close,
@ -555,4 +683,7 @@ FileOperations local_ops = {
.llistxattr = local_llistxattr,
.lsetxattr = local_lsetxattr,
.lremovexattr = local_lremovexattr,
.name_to_path = local_name_to_path,
.renameat = local_renameat,
.unlinkat = local_unlinkat,
};

820
hw/9pfs/virtio-9p.c
View File

File diff suppressed because it is too large Load Diff

50
hw/9pfs/virtio-9p.h
View File

@ -8,6 +8,8 @@
#include <sys/resource.h>
#include "hw/virtio.h"
#include "fsdev/file-op-9p.h"
#include "qemu-thread.h"
#include "qemu-coroutine.h"
/* The feature bitmap for virtio 9P */
/* The mount point is specified in a config variable */
@ -129,6 +131,8 @@ struct V9fsPDU
uint32_t size;
uint16_t tag;
uint8_t id;
uint8_t cancelled;
CoQueue complete;
VirtQueueElement elem;
struct V9fsState *s;
QLIST_ENTRY(V9fsPDU) next;
@ -204,7 +208,7 @@ struct V9fsFidState
{
int fid_type;
int32_t fid;
V9fsString path;
V9fsPath path;
union {
int fd;
DIR *dir;
@ -229,6 +233,7 @@ typedef struct V9fsState
VirtQueue *vq;
V9fsPDU pdus[MAX_REQ];
QLIST_HEAD(, V9fsPDU) free_list;
QLIST_HEAD(, V9fsPDU) active_list;
V9fsFidState *fid_list;
FileOperations *ops;
FsContext ctx;
@ -237,6 +242,11 @@ typedef struct V9fsState
size_t config_size;
enum p9_proto_version proto_version;
int32_t msize;
/*
* lock ensuring atomic path update
* on rename.
*/
CoRwlock rename_lock;
} V9fsState;
typedef struct V9fsStatState {
@ -381,7 +391,43 @@ static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
}
static inline void v9fs_path_write_lock(V9fsState *s)
{
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
qemu_co_rwlock_wrlock(&s->rename_lock);
}
}
static inline void v9fs_path_read_lock(V9fsState *s)
{
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
qemu_co_rwlock_rdlock(&s->rename_lock);
}
}
static inline void v9fs_path_unlock(V9fsState *s)
{
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
qemu_co_rwlock_unlock(&s->rename_lock);
}
}
static inline uint8_t v9fs_request_cancelled(V9fsPDU *pdu)
{
return pdu->cancelled;
}
extern void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq);
extern void virtio_9p_set_fd_limit(void);
extern void v9fs_reclaim_fd(V9fsState *s);
extern void v9fs_reclaim_fd(V9fsPDU *pdu);
extern void v9fs_string_init(V9fsString *str);
extern void v9fs_string_free(V9fsString *str);
extern void v9fs_string_null(V9fsString *str);
extern void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...);
extern void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs);
extern void v9fs_path_init(V9fsPath *path);
extern void v9fs_path_free(V9fsPath *path);
extern void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs);
extern int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath,
const char *name, V9fsPath *path);
#endif