1 /* 2 * Virtio 9p 3 * 4 * Copyright IBM, Corp. 2010 5 * 6 * Authors: 7 * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 #ifndef _FILEOP_H 14 #define _FILEOP_H 15 #include <sys/types.h> 16 #include <dirent.h> 17 #include <sys/time.h> 18 #include <utime.h> 19 #include <sys/stat.h> 20 #include <sys/uio.h> 21 #include <sys/vfs.h> 22 #define SM_LOCAL_MODE_BITS 0600 23 #define SM_LOCAL_DIR_MODE_BITS 0700 24 25 typedef enum 26 { 27 /* 28 * Server will try to set uid/gid. 29 * On failure ignore the error. 30 */ 31 SM_NONE = 0, 32 /* 33 * uid/gid set on fileserver files 34 */ 35 SM_PASSTHROUGH = 1, 36 /* 37 * uid/gid part of xattr 38 */ 39 SM_MAPPED, 40 } SecModel; 41 42 typedef struct FsCred 43 { 44 uid_t fc_uid; 45 gid_t fc_gid; 46 mode_t fc_mode; 47 dev_t fc_rdev; 48 } FsCred; 49 50 struct xattr_operations; 51 52 typedef struct FsContext 53 { 54 char *fs_root; 55 SecModel fs_sm; 56 uid_t uid; 57 struct xattr_operations **xops; 58 } FsContext; 59 60 void cred_init(FsCred *); 61 62 typedef struct FileOperations 63 { 64 int (*lstat)(FsContext *, const char *, struct stat *); 65 ssize_t (*readlink)(FsContext *, const char *, char *, size_t); 66 int (*chmod)(FsContext *, const char *, FsCred *); 67 int (*chown)(FsContext *, const char *, FsCred *); 68 int (*mknod)(FsContext *, const char *, FsCred *); 69 int (*utimensat)(FsContext *, const char *, const struct timespec *); 70 int (*remove)(FsContext *, const char *); 71 int (*symlink)(FsContext *, const char *, const char *, FsCred *); 72 int (*link)(FsContext *, const char *, const char *); 73 int (*setuid)(FsContext *, uid_t); 74 int (*close)(FsContext *, int); 75 int (*closedir)(FsContext *, DIR *); 76 DIR *(*opendir)(FsContext *, const char *); 77 int (*open)(FsContext *, const char *, int); 78 int (*open2)(FsContext *, const char *, int, FsCred *); 79 void (*rewinddir)(FsContext *, DIR *); 80 off_t (*telldir)(FsContext *, DIR *); 81 struct dirent *(*readdir)(FsContext *, DIR *); 82 void (*seekdir)(FsContext *, DIR *, off_t); 83 ssize_t (*preadv)(FsContext *, int, const struct iovec *, int, off_t); 84 ssize_t (*pwritev)(FsContext *, int, const struct iovec *, int, off_t); 85 int (*mkdir)(FsContext *, const char *, FsCred *); 86 int (*fstat)(FsContext *, int, struct stat *); 87 int (*rename)(FsContext *, const char *, const char *); 88 int (*truncate)(FsContext *, const char *, off_t); 89 int (*fsync)(FsContext *, int, int); 90 int (*statfs)(FsContext *s, const char *path, struct statfs *stbuf); 91 ssize_t (*lgetxattr)(FsContext *, const char *, 92 const char *, void *, size_t); 93 ssize_t (*llistxattr)(FsContext *, const char *, void *, size_t); 94 int (*lsetxattr)(FsContext *, const char *, 95 const char *, void *, size_t, int); 96 int (*lremovexattr)(FsContext *, const char *, const char *); 97 void *opaque; 98 } FileOperations; 99 100 #endif 101