702dbcc274
Currently, the backend of VirtFS doesn't have a cleanup function. This will lead resource leak issues if the backed driver allocates resources. This patch addresses this issue. Signed-off-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Greg Kurz <groug@kaod.org> Signed-off-by: Greg Kurz <groug@kaod.org>
149 lines
4.6 KiB
C
149 lines
4.6 KiB
C
/*
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* 9p
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef FILE_OP_9P_H
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#define FILE_OP_9P_H
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#include <dirent.h>
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#include <utime.h>
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#include <sys/vfs.h>
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#define SM_LOCAL_MODE_BITS 0600
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#define SM_LOCAL_DIR_MODE_BITS 0700
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typedef struct FsCred
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{
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uid_t fc_uid;
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gid_t fc_gid;
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mode_t fc_mode;
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dev_t fc_rdev;
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} FsCred;
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struct xattr_operations;
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struct FsContext;
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struct V9fsPath;
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typedef struct extended_ops {
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int (*get_st_gen)(struct FsContext *, struct V9fsPath *,
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mode_t, uint64_t *);
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} extended_ops;
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/* export flags */
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#define V9FS_IMMEDIATE_WRITEOUT 0x00000001
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#define V9FS_PATHNAME_FSCONTEXT 0x00000002
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/*
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* uid/gid set on fileserver files
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*/
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#define V9FS_SM_PASSTHROUGH 0x00000004
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/*
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* uid/gid part of xattr
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*/
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#define V9FS_SM_MAPPED 0x00000008
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/*
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* Server will try to set uid/gid.
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* On failure ignore the error.
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*/
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#define V9FS_SM_NONE 0x00000010
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/*
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* uid/gid part of .virtfs_meatadata namespace
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*/
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#define V9FS_SM_MAPPED_FILE 0x00000020
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#define V9FS_RDONLY 0x00000040
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#define V9FS_PROXY_SOCK_FD 0x00000080
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#define V9FS_PROXY_SOCK_NAME 0x00000100
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#define V9FS_SEC_MASK 0x0000003C
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typedef struct FileOperations FileOperations;
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/*
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* Structure to store the various fsdev's passed through command line.
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*/
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typedef struct FsDriverEntry {
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char *fsdev_id;
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char *path;
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int export_flags;
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FileOperations *ops;
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} FsDriverEntry;
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typedef struct FsContext
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{
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uid_t uid;
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char *fs_root;
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int export_flags;
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struct xattr_operations **xops;
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struct extended_ops exops;
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/* fs driver specific data */
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void *private;
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} FsContext;
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typedef struct V9fsPath {
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uint16_t size;
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char *data;
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} V9fsPath;
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typedef union V9fsFidOpenState V9fsFidOpenState;
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void cred_init(FsCred *);
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struct FileOperations
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{
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int (*parse_opts)(QemuOpts *, struct FsDriverEntry *);
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int (*init)(struct FsContext *);
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void (*cleanup)(struct FsContext *);
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int (*lstat)(FsContext *, V9fsPath *, struct stat *);
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ssize_t (*readlink)(FsContext *, V9fsPath *, char *, size_t);
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int (*chmod)(FsContext *, V9fsPath *, FsCred *);
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int (*chown)(FsContext *, V9fsPath *, FsCred *);
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int (*mknod)(FsContext *, V9fsPath *, const char *, FsCred *);
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int (*utimensat)(FsContext *, V9fsPath *, const struct timespec *);
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int (*remove)(FsContext *, const char *);
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int (*symlink)(FsContext *, const char *, V9fsPath *,
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const char *, FsCred *);
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int (*link)(FsContext *, V9fsPath *, V9fsPath *, const char *);
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int (*setuid)(FsContext *, uid_t);
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int (*close)(FsContext *, V9fsFidOpenState *);
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int (*closedir)(FsContext *, V9fsFidOpenState *);
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int (*opendir)(FsContext *, V9fsPath *, V9fsFidOpenState *);
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int (*open)(FsContext *, V9fsPath *, int, V9fsFidOpenState *);
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int (*open2)(FsContext *, V9fsPath *, const char *,
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int, FsCred *, V9fsFidOpenState *);
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void (*rewinddir)(FsContext *, V9fsFidOpenState *);
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off_t (*telldir)(FsContext *, V9fsFidOpenState *);
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struct dirent * (*readdir)(FsContext *, V9fsFidOpenState *);
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void (*seekdir)(FsContext *, V9fsFidOpenState *, off_t);
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ssize_t (*preadv)(FsContext *, V9fsFidOpenState *,
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const struct iovec *, int, off_t);
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ssize_t (*pwritev)(FsContext *, V9fsFidOpenState *,
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const struct iovec *, int, off_t);
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int (*mkdir)(FsContext *, V9fsPath *, const char *, FsCred *);
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int (*fstat)(FsContext *, int, V9fsFidOpenState *, struct stat *);
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int (*rename)(FsContext *, const char *, const char *);
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int (*truncate)(FsContext *, V9fsPath *, off_t);
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int (*fsync)(FsContext *, int, V9fsFidOpenState *, int);
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int (*statfs)(FsContext *s, V9fsPath *path, struct statfs *stbuf);
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ssize_t (*lgetxattr)(FsContext *, V9fsPath *,
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const char *, void *, size_t);
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ssize_t (*llistxattr)(FsContext *, V9fsPath *, void *, size_t);
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int (*lsetxattr)(FsContext *, V9fsPath *,
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const char *, void *, size_t, int);
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int (*lremovexattr)(FsContext *, V9fsPath *, const char *);
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int (*name_to_path)(FsContext *, V9fsPath *, const char *, V9fsPath *);
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int (*renameat)(FsContext *ctx, V9fsPath *olddir, const char *old_name,
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V9fsPath *newdir, const char *new_name);
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int (*unlinkat)(FsContext *ctx, V9fsPath *dir, const char *name, int flags);
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void *opaque;
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};
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#endif
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