4 * Copyright IBM, Corp. 2010
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #include "hw/virtio.h"
16 #include "qemu_socket.h"
17 #include "hw/virtio-pci.h"
18 #include "virtio-9p.h"
19 #include "fsdev/qemu-fsdev.h"
20 #include "virtio-9p-debug.h"
21 #include "virtio-9p-xattr.h"
37 static int omode_to_uflags(int8_t mode)
71 void cred_init(FsCred *credp)
79 static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
81 return s->ops->lstat(&s->ctx, path->data, stbuf);
84 static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
88 buf->data = qemu_malloc(1024);
90 len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1);
99 static int v9fs_do_close(V9fsState *s, int fd)
101 return s->ops->close(&s->ctx, fd);
104 static int v9fs_do_closedir(V9fsState *s, DIR *dir)
106 return s->ops->closedir(&s->ctx, dir);
109 static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags)
111 return s->ops->open(&s->ctx, path->data, flags);
114 static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
116 return s->ops->opendir(&s->ctx, path->data);
119 static void v9fs_do_rewinddir(V9fsState *s, DIR *dir)
121 return s->ops->rewinddir(&s->ctx, dir);
124 static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
126 return s->ops->telldir(&s->ctx, dir);
129 static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir)
131 return s->ops->readdir(&s->ctx, dir);
134 static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off)
136 return s->ops->seekdir(&s->ctx, dir, off);
139 static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov,
140 int iovcnt, int64_t offset)
142 return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
145 static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov,
146 int iovcnt, int64_t offset)
148 return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset);
151 static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
156 return s->ops->chmod(&s->ctx, path->data, &cred);
159 static int v9fs_do_mknod(V9fsState *s, char *name,
160 mode_t mode, dev_t dev, uid_t uid, gid_t gid)
168 return s->ops->mknod(&s->ctx, name, &cred);
171 static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode,
172 uid_t uid, gid_t gid)
181 return s->ops->mkdir(&s->ctx, name, &cred);
184 static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
186 return s->ops->fstat(&s->ctx, fd, stbuf);
189 static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid,
197 cred.fc_mode = mode & 07777;
199 return s->ops->open2(&s->ctx, fullname, flags, &cred);
202 static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp,
203 const char *oldpath, const char *newpath, gid_t gid)
207 cred.fc_uid = fidp->uid;
211 return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
214 static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
216 return s->ops->link(&s->ctx, oldpath->data, newpath->data);
219 static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size)
221 return s->ops->truncate(&s->ctx, path->data, size);
224 static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath,
227 return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
230 static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
237 return s->ops->chown(&s->ctx, path->data, &cred);
240 static int v9fs_do_utimensat(V9fsState *s, V9fsString *path,
241 const struct timespec times[2])
243 return s->ops->utimensat(&s->ctx, path->data, times);
246 static int v9fs_do_remove(V9fsState *s, V9fsString *path)
248 return s->ops->remove(&s->ctx, path->data);
251 static int v9fs_do_fsync(V9fsState *s, int fd, int datasync)
253 return s->ops->fsync(&s->ctx, fd, datasync);
256 static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
258 return s->ops->statfs(&s->ctx, path->data, stbuf);
261 static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path,
262 V9fsString *xattr_name,
263 void *value, size_t size)
265 return s->ops->lgetxattr(&s->ctx, path->data,
266 xattr_name->data, value, size);
269 static ssize_t v9fs_do_llistxattr(V9fsState *s, V9fsString *path,
270 void *value, size_t size)
272 return s->ops->llistxattr(&s->ctx, path->data,
276 static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path,
277 V9fsString *xattr_name,
278 void *value, size_t size, int flags)
280 return s->ops->lsetxattr(&s->ctx, path->data,
281 xattr_name->data, value, size, flags);
284 static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path,
285 V9fsString *xattr_name)
287 return s->ops->lremovexattr(&s->ctx, path->data,
292 static void v9fs_string_init(V9fsString *str)
298 static void v9fs_string_free(V9fsString *str)
300 qemu_free(str->data);
305 static void v9fs_string_null(V9fsString *str)
307 v9fs_string_free(str);
310 static int number_to_string(void *arg, char type)
312 unsigned int ret = 0;
316 unsigned int num = *(unsigned int *)arg;
325 unsigned long num = *(unsigned long *)arg;
333 printf("Number_to_string: Unknown number format\n");
340 static int GCC_FMT_ATTR(2, 0)
341 v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap)
344 char *iter = (char *)fmt;
348 unsigned int arg_uint;
349 unsigned long arg_ulong;
351 /* Find the number of %'s that denotes an argument */
352 for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
357 len = strlen(fmt) - 2*nr_args;
367 /* Now parse the format string */
368 for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
372 arg_uint = va_arg(ap2, unsigned int);
373 len += number_to_string((void *)&arg_uint, 'u');
376 if (*++iter == 'u') {
377 arg_ulong = va_arg(ap2, unsigned long);
378 len += number_to_string((void *)&arg_ulong, 'U');
384 arg_char_ptr = va_arg(ap2, char *);
385 len += strlen(arg_char_ptr);
392 "v9fs_string_alloc_printf:Incorrect format %c", *iter);
399 *strp = qemu_malloc((len + 1) * sizeof(**strp));
401 return vsprintf(*strp, fmt, ap);
404 static void GCC_FMT_ATTR(2, 3)
405 v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)
410 v9fs_string_free(str);
413 err = v9fs_string_alloc_printf(&str->data, fmt, ap);
420 static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
422 v9fs_string_free(lhs);
423 v9fs_string_sprintf(lhs, "%s", rhs->data);
427 * Return TRUE if s1 is an ancestor of s2.
429 * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
430 * As a special case, We treat s1 as ancestor of s2 if they are same!
432 static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2)
434 if (!strncmp(s1->data, s2->data, s1->size)) {
435 if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') {
442 static size_t v9fs_string_size(V9fsString *str)
447 static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
451 for (f = s->fid_list; f; f = f->next) {
460 static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
464 f = lookup_fid(s, fid);
469 f = qemu_mallocz(sizeof(V9fsFidState));
472 f->fid_type = P9_FID_NONE;
474 f->next = s->fid_list;
480 static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp)
484 if (fidp->fs.xattr.copied_len == -1) {
485 /* getxattr/listxattr fid */
489 * if this is fid for setxattr. clunk should
490 * result in setxattr localcall
492 if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
493 /* clunk after partial write */
497 if (fidp->fs.xattr.len) {
498 retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name,
499 fidp->fs.xattr.value,
501 fidp->fs.xattr.flags);
503 retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name);
506 v9fs_string_free(&fidp->fs.xattr.name);
508 if (fidp->fs.xattr.value) {
509 qemu_free(fidp->fs.xattr.value);
514 static int free_fid(V9fsState *s, int32_t fid)
517 V9fsFidState **fidpp, *fidp;
519 for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
520 if ((*fidpp)->fid == fid) {
525 if (*fidpp == NULL) {
532 if (fidp->fid_type == P9_FID_FILE) {
533 v9fs_do_close(s, fidp->fs.fd);
534 } else if (fidp->fid_type == P9_FID_DIR) {
535 v9fs_do_closedir(s, fidp->fs.dir);
536 } else if (fidp->fid_type == P9_FID_XATTR) {
537 retval = v9fs_xattr_fid_clunk(s, fidp);
539 v9fs_string_free(&fidp->path);
545 #define P9_QID_TYPE_DIR 0x80
546 #define P9_QID_TYPE_SYMLINK 0x02
548 #define P9_STAT_MODE_DIR 0x80000000
549 #define P9_STAT_MODE_APPEND 0x40000000
550 #define P9_STAT_MODE_EXCL 0x20000000
551 #define P9_STAT_MODE_MOUNT 0x10000000
552 #define P9_STAT_MODE_AUTH 0x08000000
553 #define P9_STAT_MODE_TMP 0x04000000
554 #define P9_STAT_MODE_SYMLINK 0x02000000
555 #define P9_STAT_MODE_LINK 0x01000000
556 #define P9_STAT_MODE_DEVICE 0x00800000
557 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
558 #define P9_STAT_MODE_SOCKET 0x00100000
559 #define P9_STAT_MODE_SETUID 0x00080000
560 #define P9_STAT_MODE_SETGID 0x00040000
561 #define P9_STAT_MODE_SETVTX 0x00010000
563 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
564 P9_STAT_MODE_SYMLINK | \
565 P9_STAT_MODE_LINK | \
566 P9_STAT_MODE_DEVICE | \
567 P9_STAT_MODE_NAMED_PIPE | \
570 /* This is the algorithm from ufs in spfs */
571 static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
575 size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
576 memcpy(&qidp->path, &stbuf->st_ino, size);
577 qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
579 if (S_ISDIR(stbuf->st_mode)) {
580 qidp->type |= P9_QID_TYPE_DIR;
582 if (S_ISLNK(stbuf->st_mode)) {
583 qidp->type |= P9_QID_TYPE_SYMLINK;
587 static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp)
592 err = v9fs_do_lstat(s, &fidp->path, &stbuf);
597 stat_to_qid(&stbuf, qidp);
601 static V9fsPDU *alloc_pdu(V9fsState *s)
605 if (!QLIST_EMPTY(&s->free_list)) {
606 pdu = QLIST_FIRST(&s->free_list);
607 QLIST_REMOVE(pdu, next);
612 static void free_pdu(V9fsState *s, V9fsPDU *pdu)
618 QLIST_INSERT_HEAD(&s->free_list, pdu, next);
622 size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
623 size_t offset, size_t size, int pack)
628 for (i = 0; size && i < sg_count; i++) {
630 if (offset >= sg[i].iov_len) {
632 offset -= sg[i].iov_len;
635 len = MIN(sg[i].iov_len - offset, size);
637 memcpy(sg[i].iov_base + offset, addr, len);
639 memcpy(addr, sg[i].iov_base + offset, len);
654 static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size)
656 return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
660 static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src,
663 return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num,
667 static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg)
671 struct iovec *src_sg;
675 src_sg = pdu->elem.in_sg;
676 num = pdu->elem.in_num;
678 src_sg = pdu->elem.out_sg;
679 num = pdu->elem.out_num;
683 for (i = 0; i < num; i++) {
685 sg[j].iov_base = src_sg[i].iov_base;
686 sg[j].iov_len = src_sg[i].iov_len;
688 } else if (offset < (src_sg[i].iov_len + pos)) {
689 sg[j].iov_base = src_sg[i].iov_base;
690 sg[j].iov_len = src_sg[i].iov_len;
691 sg[j].iov_base += (offset - pos);
692 sg[j].iov_len -= (offset - pos);
695 pos += src_sg[i].iov_len;
701 static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
703 size_t old_offset = offset;
708 for (i = 0; fmt[i]; i++) {
711 uint8_t *valp = va_arg(ap, uint8_t *);
712 offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
717 valp = va_arg(ap, uint16_t *);
718 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
719 *valp = le16_to_cpu(val);
724 valp = va_arg(ap, uint32_t *);
725 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
726 *valp = le32_to_cpu(val);
731 valp = va_arg(ap, uint64_t *);
732 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
733 *valp = le64_to_cpu(val);
737 struct iovec *iov = va_arg(ap, struct iovec *);
738 int *iovcnt = va_arg(ap, int *);
739 *iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
743 V9fsString *str = va_arg(ap, V9fsString *);
744 offset += pdu_unmarshal(pdu, offset, "w", &str->size);
745 /* FIXME: sanity check str->size */
746 str->data = qemu_malloc(str->size + 1);
747 offset += pdu_unpack(str->data, pdu, offset, str->size);
748 str->data[str->size] = 0;
752 V9fsQID *qidp = va_arg(ap, V9fsQID *);
753 offset += pdu_unmarshal(pdu, offset, "bdq",
754 &qidp->type, &qidp->version, &qidp->path);
758 V9fsStat *statp = va_arg(ap, V9fsStat *);
759 offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
760 &statp->size, &statp->type, &statp->dev,
761 &statp->qid, &statp->mode, &statp->atime,
762 &statp->mtime, &statp->length,
763 &statp->name, &statp->uid, &statp->gid,
764 &statp->muid, &statp->extension,
765 &statp->n_uid, &statp->n_gid,
770 V9fsIattr *iattr = va_arg(ap, V9fsIattr *);
771 offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
772 &iattr->valid, &iattr->mode,
773 &iattr->uid, &iattr->gid, &iattr->size,
774 &iattr->atime_sec, &iattr->atime_nsec,
775 &iattr->mtime_sec, &iattr->mtime_nsec);
785 return offset - old_offset;
788 static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
790 size_t old_offset = offset;
795 for (i = 0; fmt[i]; i++) {
798 uint8_t val = va_arg(ap, int);
799 offset += pdu_pack(pdu, offset, &val, sizeof(val));
804 cpu_to_le16w(&val, va_arg(ap, int));
805 offset += pdu_pack(pdu, offset, &val, sizeof(val));
810 cpu_to_le32w(&val, va_arg(ap, uint32_t));
811 offset += pdu_pack(pdu, offset, &val, sizeof(val));
816 cpu_to_le64w(&val, va_arg(ap, uint64_t));
817 offset += pdu_pack(pdu, offset, &val, sizeof(val));
821 struct iovec *iov = va_arg(ap, struct iovec *);
822 int *iovcnt = va_arg(ap, int *);
823 *iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
827 V9fsString *str = va_arg(ap, V9fsString *);
828 offset += pdu_marshal(pdu, offset, "w", str->size);
829 offset += pdu_pack(pdu, offset, str->data, str->size);
833 V9fsQID *qidp = va_arg(ap, V9fsQID *);
834 offset += pdu_marshal(pdu, offset, "bdq",
835 qidp->type, qidp->version, qidp->path);
839 V9fsStat *statp = va_arg(ap, V9fsStat *);
840 offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
841 statp->size, statp->type, statp->dev,
842 &statp->qid, statp->mode, statp->atime,
843 statp->mtime, statp->length, &statp->name,
844 &statp->uid, &statp->gid, &statp->muid,
845 &statp->extension, statp->n_uid,
846 statp->n_gid, statp->n_muid);
850 V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
851 offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
852 statp->st_result_mask,
853 &statp->qid, statp->st_mode,
854 statp->st_uid, statp->st_gid,
855 statp->st_nlink, statp->st_rdev,
856 statp->st_size, statp->st_blksize, statp->st_blocks,
857 statp->st_atime_sec, statp->st_atime_nsec,
858 statp->st_mtime_sec, statp->st_mtime_nsec,
859 statp->st_ctime_sec, statp->st_ctime_nsec,
860 statp->st_btime_sec, statp->st_btime_nsec,
861 statp->st_gen, statp->st_data_version);
870 return offset - old_offset;
873 static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
875 int8_t id = pdu->id + 1; /* Response */
881 if (s->proto_version != V9FS_PROTO_2000L) {
884 str.data = strerror(err);
885 str.size = strlen(str.data);
887 len += pdu_marshal(pdu, len, "s", &str);
891 len += pdu_marshal(pdu, len, "d", err);
893 if (s->proto_version == V9FS_PROTO_2000L) {
898 /* fill out the header */
899 pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
901 /* keep these in sync */
905 /* push onto queue and notify */
906 virtqueue_push(s->vq, &pdu->elem, len);
908 /* FIXME: we should batch these completions */
909 virtio_notify(&s->vdev, s->vq);
914 static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
919 if (mode & P9_STAT_MODE_DIR) {
923 if (mode & P9_STAT_MODE_SYMLINK) {
926 if (mode & P9_STAT_MODE_SOCKET) {
929 if (mode & P9_STAT_MODE_NAMED_PIPE) {
932 if (mode & P9_STAT_MODE_DEVICE) {
933 if (extension && extension->data[0] == 'c') {
944 if (mode & P9_STAT_MODE_SETUID) {
947 if (mode & P9_STAT_MODE_SETGID) {
950 if (mode & P9_STAT_MODE_SETVTX) {
957 static int donttouch_stat(V9fsStat *stat)
959 if (stat->type == -1 &&
961 stat->qid.type == -1 &&
962 stat->qid.version == -1 &&
963 stat->qid.path == -1 &&
967 stat->length == -1 &&
974 stat->n_muid == -1) {
981 static void v9fs_stat_free(V9fsStat *stat)
983 v9fs_string_free(&stat->name);
984 v9fs_string_free(&stat->uid);
985 v9fs_string_free(&stat->gid);
986 v9fs_string_free(&stat->muid);
987 v9fs_string_free(&stat->extension);
990 static uint32_t stat_to_v9mode(const struct stat *stbuf)
994 mode = stbuf->st_mode & 0777;
995 if (S_ISDIR(stbuf->st_mode)) {
996 mode |= P9_STAT_MODE_DIR;
999 if (S_ISLNK(stbuf->st_mode)) {
1000 mode |= P9_STAT_MODE_SYMLINK;
1003 if (S_ISSOCK(stbuf->st_mode)) {
1004 mode |= P9_STAT_MODE_SOCKET;
1007 if (S_ISFIFO(stbuf->st_mode)) {
1008 mode |= P9_STAT_MODE_NAMED_PIPE;
1011 if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
1012 mode |= P9_STAT_MODE_DEVICE;
1015 if (stbuf->st_mode & S_ISUID) {
1016 mode |= P9_STAT_MODE_SETUID;
1019 if (stbuf->st_mode & S_ISGID) {
1020 mode |= P9_STAT_MODE_SETGID;
1023 if (stbuf->st_mode & S_ISVTX) {
1024 mode |= P9_STAT_MODE_SETVTX;
1030 static int stat_to_v9stat(V9fsState *s, V9fsString *name,
1031 const struct stat *stbuf,
1037 memset(v9stat, 0, sizeof(*v9stat));
1039 stat_to_qid(stbuf, &v9stat->qid);
1040 v9stat->mode = stat_to_v9mode(stbuf);
1041 v9stat->atime = stbuf->st_atime;
1042 v9stat->mtime = stbuf->st_mtime;
1043 v9stat->length = stbuf->st_size;
1045 v9fs_string_null(&v9stat->uid);
1046 v9fs_string_null(&v9stat->gid);
1047 v9fs_string_null(&v9stat->muid);
1049 v9stat->n_uid = stbuf->st_uid;
1050 v9stat->n_gid = stbuf->st_gid;
1053 v9fs_string_null(&v9stat->extension);
1055 if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
1056 err = v9fs_do_readlink(s, name, &v9stat->extension);
1061 v9stat->extension.data[err] = 0;
1062 v9stat->extension.size = err;
1063 } else if (v9stat->mode & P9_STAT_MODE_DEVICE) {
1064 v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
1065 S_ISCHR(stbuf->st_mode) ? 'c' : 'b',
1066 major(stbuf->st_rdev), minor(stbuf->st_rdev));
1067 } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) {
1068 v9fs_string_sprintf(&v9stat->extension, "%s %lu",
1069 "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink);
1072 str = strrchr(name->data, '/');
1079 v9fs_string_sprintf(&v9stat->name, "%s", str);
1082 v9fs_string_size(&v9stat->name) +
1083 v9fs_string_size(&v9stat->uid) +
1084 v9fs_string_size(&v9stat->gid) +
1085 v9fs_string_size(&v9stat->muid) +
1086 v9fs_string_size(&v9stat->extension);
1090 #define P9_STATS_MODE 0x00000001ULL
1091 #define P9_STATS_NLINK 0x00000002ULL
1092 #define P9_STATS_UID 0x00000004ULL
1093 #define P9_STATS_GID 0x00000008ULL
1094 #define P9_STATS_RDEV 0x00000010ULL
1095 #define P9_STATS_ATIME 0x00000020ULL
1096 #define P9_STATS_MTIME 0x00000040ULL
1097 #define P9_STATS_CTIME 0x00000080ULL
1098 #define P9_STATS_INO 0x00000100ULL
1099 #define P9_STATS_SIZE 0x00000200ULL
1100 #define P9_STATS_BLOCKS 0x00000400ULL
1102 #define P9_STATS_BTIME 0x00000800ULL
1103 #define P9_STATS_GEN 0x00001000ULL
1104 #define P9_STATS_DATA_VERSION 0x00002000ULL
1106 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1107 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1110 static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf,
1111 V9fsStatDotl *v9lstat)
1113 memset(v9lstat, 0, sizeof(*v9lstat));
1115 v9lstat->st_mode = stbuf->st_mode;
1116 v9lstat->st_nlink = stbuf->st_nlink;
1117 v9lstat->st_uid = stbuf->st_uid;
1118 v9lstat->st_gid = stbuf->st_gid;
1119 v9lstat->st_rdev = stbuf->st_rdev;
1120 v9lstat->st_size = stbuf->st_size;
1121 v9lstat->st_blksize = stbuf->st_blksize;
1122 v9lstat->st_blocks = stbuf->st_blocks;
1123 v9lstat->st_atime_sec = stbuf->st_atime;
1124 v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec;
1125 v9lstat->st_mtime_sec = stbuf->st_mtime;
1126 v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec;
1127 v9lstat->st_ctime_sec = stbuf->st_ctime;
1128 v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec;
1129 /* Currently we only support BASIC fields in stat */
1130 v9lstat->st_result_mask = P9_STATS_BASIC;
1132 stat_to_qid(stbuf, &v9lstat->qid);
1135 static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt)
1137 while (len && *iovcnt) {
1138 if (len < sg->iov_len) {
1140 sg->iov_base += len;
1152 static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt)
1157 for (i = 0; i < *cnt; i++) {
1158 if ((total + sg[i].iov_len) > cap) {
1159 sg[i].iov_len -= ((total + sg[i].iov_len) - cap);
1163 total += sg[i].iov_len;
1171 static void print_sg(struct iovec *sg, int cnt)
1175 printf("sg[%d]: {", cnt);
1176 for (i = 0; i < cnt; i++) {
1180 printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
1185 static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len)
1188 v9fs_string_init(&str);
1189 v9fs_string_copy(&str, dst);
1190 v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
1191 v9fs_string_free(&str);
1194 static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
1199 pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
1201 if (!strcmp(version.data, "9P2000.u")) {
1202 s->proto_version = V9FS_PROTO_2000U;
1203 } else if (!strcmp(version.data, "9P2000.L")) {
1204 s->proto_version = V9FS_PROTO_2000L;
1206 v9fs_string_sprintf(&version, "unknown");
1209 offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
1210 complete_pdu(s, pdu, offset);
1212 v9fs_string_free(&version);
1215 static void v9fs_attach(V9fsState *s, V9fsPDU *pdu)
1217 int32_t fid, afid, n_uname;
1218 V9fsString uname, aname;
1224 pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
1226 fidp = alloc_fid(s, fid);
1232 fidp->uid = n_uname;
1234 v9fs_string_sprintf(&fidp->path, "%s", "/");
1235 err = fid_to_qid(s, fidp, &qid);
1242 offset += pdu_marshal(pdu, offset, "Q", &qid);
1246 complete_pdu(s, pdu, err);
1247 v9fs_string_free(&uname);
1248 v9fs_string_free(&aname);
1251 static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err)
1258 err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat);
1262 vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat);
1266 complete_pdu(s, vs->pdu, err);
1267 v9fs_stat_free(&vs->v9stat);
1271 static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
1277 vs = qemu_malloc(sizeof(*vs));
1281 memset(&vs->v9stat, 0, sizeof(vs->v9stat));
1283 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
1285 vs->fidp = lookup_fid(s, fid);
1286 if (vs->fidp == NULL) {
1291 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1292 v9fs_stat_post_lstat(s, vs, err);
1296 complete_pdu(s, vs->pdu, err);
1297 v9fs_stat_free(&vs->v9stat);
1301 static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs,
1309 stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl);
1310 vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
1314 complete_pdu(s, vs->pdu, err);
1318 static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu)
1321 V9fsStatStateDotl *vs;
1324 uint64_t request_mask;
1326 vs = qemu_malloc(sizeof(*vs));
1330 memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl));
1332 pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
1334 fidp = lookup_fid(s, fid);
1340 /* Currently we only support BASIC fields in stat, so there is no
1341 * need to look at request_mask.
1343 err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf);
1344 v9fs_getattr_post_lstat(s, vs, err);
1348 complete_pdu(s, vs->pdu, err);
1352 /* From Linux kernel code */
1353 #define ATTR_MODE (1 << 0)
1354 #define ATTR_UID (1 << 1)
1355 #define ATTR_GID (1 << 2)
1356 #define ATTR_SIZE (1 << 3)
1357 #define ATTR_ATIME (1 << 4)
1358 #define ATTR_MTIME (1 << 5)
1359 #define ATTR_CTIME (1 << 6)
1360 #define ATTR_MASK 127
1361 #define ATTR_ATIME_SET (1 << 7)
1362 #define ATTR_MTIME_SET (1 << 8)
1364 static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs,
1374 complete_pdu(s, vs->pdu, err);
1378 static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err)
1385 if (vs->v9iattr.valid & (ATTR_SIZE)) {
1386 err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size);
1388 v9fs_setattr_post_truncate(s, vs, err);
1392 complete_pdu(s, vs->pdu, err);
1396 static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs,
1404 /* If the only valid entry in iattr is ctime we can call
1405 * chown(-1,-1) to update the ctime of the file
1407 if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
1408 ((vs->v9iattr.valid & ATTR_CTIME)
1409 && !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) {
1410 if (!(vs->v9iattr.valid & ATTR_UID)) {
1411 vs->v9iattr.uid = -1;
1413 if (!(vs->v9iattr.valid & ATTR_GID)) {
1414 vs->v9iattr.gid = -1;
1416 err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid,
1419 v9fs_setattr_post_chown(s, vs, err);
1423 complete_pdu(s, vs->pdu, err);
1427 static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err)
1434 if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
1435 struct timespec times[2];
1436 if (vs->v9iattr.valid & ATTR_ATIME) {
1437 if (vs->v9iattr.valid & ATTR_ATIME_SET) {
1438 times[0].tv_sec = vs->v9iattr.atime_sec;
1439 times[0].tv_nsec = vs->v9iattr.atime_nsec;
1441 times[0].tv_nsec = UTIME_NOW;
1444 times[0].tv_nsec = UTIME_OMIT;
1447 if (vs->v9iattr.valid & ATTR_MTIME) {
1448 if (vs->v9iattr.valid & ATTR_MTIME_SET) {
1449 times[1].tv_sec = vs->v9iattr.mtime_sec;
1450 times[1].tv_nsec = vs->v9iattr.mtime_nsec;
1452 times[1].tv_nsec = UTIME_NOW;
1455 times[1].tv_nsec = UTIME_OMIT;
1457 err = v9fs_do_utimensat(s, &vs->fidp->path, times);
1459 v9fs_setattr_post_utimensat(s, vs, err);
1463 complete_pdu(s, vs->pdu, err);
1467 static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu)
1470 V9fsSetattrState *vs;
1473 vs = qemu_malloc(sizeof(*vs));
1477 pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
1479 vs->fidp = lookup_fid(s, fid);
1480 if (vs->fidp == NULL) {
1485 if (vs->v9iattr.valid & ATTR_MODE) {
1486 err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode);
1489 v9fs_setattr_post_chmod(s, vs, err);
1493 complete_pdu(s, vs->pdu, err);
1497 static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err)
1499 complete_pdu(s, vs->pdu, err);
1501 if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
1502 for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) {
1503 v9fs_string_free(&vs->wnames[vs->name_idx]);
1506 qemu_free(vs->wnames);
1507 qemu_free(vs->qids);
1511 static void v9fs_walk_marshal(V9fsWalkState *vs)
1515 vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
1517 for (i = 0; i < vs->nwnames; i++) {
1518 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
1522 static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
1526 free_fid(s, vs->newfidp->fid);
1527 v9fs_string_free(&vs->path);
1532 stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
1535 if (vs->name_idx < vs->nwnames) {
1536 v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
1537 vs->wnames[vs->name_idx].data);
1538 v9fs_string_copy(&vs->newfidp->path, &vs->path);
1540 err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
1541 v9fs_walk_post_newfid_lstat(s, vs, err);
1545 v9fs_string_free(&vs->path);
1546 v9fs_walk_marshal(vs);
1549 v9fs_walk_complete(s, vs, err);
1552 static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs,
1556 v9fs_string_free(&vs->path);
1561 stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
1563 if (vs->name_idx < vs->nwnames) {
1565 v9fs_string_sprintf(&vs->path, "%s/%s",
1566 vs->fidp->path.data, vs->wnames[vs->name_idx].data);
1567 v9fs_string_copy(&vs->fidp->path, &vs->path);
1569 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1570 v9fs_walk_post_oldfid_lstat(s, vs, err);
1574 v9fs_string_free(&vs->path);
1575 v9fs_walk_marshal(vs);
1578 v9fs_walk_complete(s, vs, err);
1581 static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
1583 int32_t fid, newfid;
1588 vs = qemu_malloc(sizeof(*vs));
1594 vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
1595 &newfid, &vs->nwnames);
1597 if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
1598 vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames);
1600 vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames);
1602 for (i = 0; i < vs->nwnames; i++) {
1603 vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
1606 } else if (vs->nwnames > P9_MAXWELEM) {
1611 vs->fidp = lookup_fid(s, fid);
1612 if (vs->fidp == NULL) {
1617 /* FIXME: is this really valid? */
1618 if (fid == newfid) {
1620 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
1621 v9fs_string_init(&vs->path);
1624 if (vs->name_idx < vs->nwnames) {
1625 v9fs_string_sprintf(&vs->path, "%s/%s",
1626 vs->fidp->path.data, vs->wnames[vs->name_idx].data);
1627 v9fs_string_copy(&vs->fidp->path, &vs->path);
1629 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1630 v9fs_walk_post_oldfid_lstat(s, vs, err);
1634 vs->newfidp = alloc_fid(s, newfid);
1635 if (vs->newfidp == NULL) {
1640 vs->newfidp->uid = vs->fidp->uid;
1641 v9fs_string_init(&vs->path);
1643 v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path);
1645 if (vs->name_idx < vs->nwnames) {
1646 v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
1647 vs->wnames[vs->name_idx].data);
1648 v9fs_string_copy(&vs->newfidp->path, &vs->path);
1650 err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
1651 v9fs_walk_post_newfid_lstat(s, vs, err);
1656 v9fs_walk_marshal(vs);
1659 v9fs_walk_complete(s, vs, err);
1662 static int32_t get_iounit(V9fsState *s, V9fsString *name)
1664 struct statfs stbuf;
1668 * iounit should be multiples of f_bsize (host filesystem block size
1669 * and as well as less than (client msize - P9_IOHDRSZ))
1671 if (!v9fs_do_statfs(s, name, &stbuf)) {
1672 iounit = stbuf.f_bsize;
1673 iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize;
1677 iounit = s->msize - P9_IOHDRSZ;
1682 static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err)
1684 if (vs->fidp->fs.dir == NULL) {
1688 vs->fidp->fid_type = P9_FID_DIR;
1689 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
1692 complete_pdu(s, vs->pdu, err);
1697 static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs)
1700 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
1702 complete_pdu(s, vs->pdu, err);
1706 static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err)
1708 if (vs->fidp->fs.fd == -1) {
1712 vs->fidp->fid_type = P9_FID_FILE;
1713 vs->iounit = get_iounit(s, &vs->fidp->path);
1714 v9fs_open_post_getiounit(s, vs);
1717 complete_pdu(s, vs->pdu, err);
1721 static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
1730 stat_to_qid(&vs->stbuf, &vs->qid);
1732 if (S_ISDIR(vs->stbuf.st_mode)) {
1733 vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path);
1734 v9fs_open_post_opendir(s, vs, err);
1736 if (s->proto_version == V9FS_PROTO_2000L) {
1738 flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
1739 /* Ignore direct disk access hint until the server supports it. */
1742 flags = omode_to_uflags(vs->mode);
1744 vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags);
1745 v9fs_open_post_open(s, vs, err);
1749 complete_pdu(s, vs->pdu, err);
1753 static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
1759 vs = qemu_malloc(sizeof(*vs));
1764 if (s->proto_version == V9FS_PROTO_2000L) {
1765 pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
1767 pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
1770 vs->fidp = lookup_fid(s, fid);
1771 if (vs->fidp == NULL) {
1776 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
1778 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1780 v9fs_open_post_lstat(s, vs, err);
1783 complete_pdu(s, pdu, err);
1787 static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err)
1790 v9fs_string_copy(&vs->fidp->path, &vs->fullname);
1791 stat_to_qid(&vs->stbuf, &vs->qid);
1792 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
1796 vs->fidp->fid_type = P9_FID_NONE;
1798 if (vs->fidp->fs.fd > 0) {
1799 close(vs->fidp->fs.fd);
1803 complete_pdu(s, vs->pdu, err);
1804 v9fs_string_free(&vs->name);
1805 v9fs_string_free(&vs->fullname);
1809 static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs,
1816 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
1819 v9fs_post_lcreate(s, vs, err);
1822 static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs,
1825 if (vs->fidp->fs.fd == -1) {
1829 vs->fidp->fid_type = P9_FID_FILE;
1830 vs->iounit = get_iounit(s, &vs->fullname);
1831 v9fs_lcreate_post_get_iounit(s, vs, err);
1835 v9fs_post_lcreate(s, vs, err);
1838 static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu)
1840 int32_t dfid, flags, mode;
1842 V9fsLcreateState *vs;
1845 vs = qemu_malloc(sizeof(*vs));
1849 v9fs_string_init(&vs->fullname);
1851 pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
1854 vs->fidp = lookup_fid(s, dfid);
1855 if (vs->fidp == NULL) {
1860 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
1863 /* Ignore direct disk access hint until the server supports it. */
1866 vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
1868 v9fs_lcreate_post_do_open2(s, vs, err);
1872 complete_pdu(s, vs->pdu, err);
1873 v9fs_string_free(&vs->name);
1877 static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err)
1882 complete_pdu(s, pdu, err);
1885 static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu)
1893 pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
1894 fidp = lookup_fid(s, fid);
1897 v9fs_post_do_fsync(s, pdu, err);
1900 err = v9fs_do_fsync(s, fidp->fs.fd, datasync);
1901 v9fs_post_do_fsync(s, pdu, err);
1904 static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
1910 pdu_unmarshal(pdu, offset, "d", &fid);
1912 err = free_fid(s, fid);
1920 complete_pdu(s, pdu, err);
1923 static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t);
1925 static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1930 v9fs_stat_free(&vs->v9stat);
1931 v9fs_string_free(&vs->name);
1932 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
1933 vs->offset += vs->count;
1936 complete_pdu(s, vs->pdu, err);
1941 static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
1948 err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat);
1953 vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S",
1955 if ((vs->len != (vs->v9stat.size + 2)) ||
1956 ((vs->count + vs->len) > vs->max_count)) {
1957 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
1958 v9fs_read_post_seekdir(s, vs, err);
1961 vs->count += vs->len;
1962 v9fs_stat_free(&vs->v9stat);
1963 v9fs_string_free(&vs->name);
1964 vs->dir_pos = vs->dent->d_off;
1965 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
1966 v9fs_read_post_readdir(s, vs, err);
1969 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
1970 v9fs_read_post_seekdir(s, vs, err);
1975 static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1978 memset(&vs->v9stat, 0, sizeof(vs->v9stat));
1979 v9fs_string_init(&vs->name);
1980 v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
1982 err = v9fs_do_lstat(s, &vs->name, &vs->stbuf);
1983 v9fs_read_post_dir_lstat(s, vs, err);
1987 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
1988 vs->offset += vs->count;
1990 complete_pdu(s, vs->pdu, err);
1995 static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1997 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
1998 v9fs_read_post_readdir(s, vs, err);
2002 static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
2005 vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
2006 v9fs_read_post_telldir(s, vs, err);
2010 static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err)
2013 /* IO error return the error */
2017 vs->total += vs->len;
2018 vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
2019 if (vs->total < vs->count && vs->len > 0) {
2022 print_sg(vs->sg, vs->cnt);
2024 vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
2029 } while (vs->len == -1 && errno == EINTR);
2030 if (vs->len == -1) {
2033 v9fs_read_post_preadv(s, vs, err);
2036 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
2037 vs->offset += vs->count;
2041 complete_pdu(s, vs->pdu, err);
2045 static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs)
2051 xattr_len = vs->fidp->fs.xattr.len;
2052 read_count = xattr_len - vs->off;
2053 if (read_count > vs->count) {
2054 read_count = vs->count;
2055 } else if (read_count < 0) {
2057 * read beyond XATTR value
2061 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
2062 vs->offset += pdu_pack(vs->pdu, vs->offset,
2063 ((char *)vs->fidp->fs.xattr.value) + vs->off,
2066 complete_pdu(s, vs->pdu, err);
2070 static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
2076 vs = qemu_malloc(sizeof(*vs));
2083 pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
2085 vs->fidp = lookup_fid(s, fid);
2086 if (vs->fidp == NULL) {
2091 if (vs->fidp->fid_type == P9_FID_DIR) {
2092 vs->max_count = vs->count;
2095 v9fs_do_rewinddir(s, vs->fidp->fs.dir);
2097 v9fs_read_post_rewinddir(s, vs, err);
2099 } else if (vs->fidp->fid_type == P9_FID_FILE) {
2101 pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
2102 vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
2103 if (vs->total <= vs->count) {
2104 vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
2110 v9fs_read_post_preadv(s, vs, err);
2113 } else if (vs->fidp->fid_type == P9_FID_XATTR) {
2114 v9fs_xattr_read(s, vs);
2120 complete_pdu(s, pdu, err);
2124 typedef struct V9fsReadDirState {
2128 off_t saved_dir_pos;
2129 struct dirent *dent;
2133 int64_t initial_offset;
2137 static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs)
2139 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
2140 vs->offset += vs->count;
2141 complete_pdu(s, vs->pdu, vs->offset);
2146 /* Size of each dirent on the wire: size of qid (13) + size of offset (8)
2147 * size of type (1) + size of name.size (2) + strlen(name.data)
2149 #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
2151 static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
2157 v9fs_string_init(&vs->name);
2158 v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
2160 if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
2161 /* Ran out of buffer. Set dir back to old position and return */
2162 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos);
2163 v9fs_readdir_post_seekdir(s, vs);
2167 /* Fill up just the path field of qid because the client uses
2168 * only that. To fill the entire qid structure we will have
2169 * to stat each dirent found, which is expensive
2171 size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path));
2172 memcpy(&vs->qid.path, &vs->dent->d_ino, size);
2173 /* Fill the other fields with dummy values */
2175 vs->qid.version = 0;
2177 len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs",
2178 &vs->qid, vs->dent->d_off,
2179 vs->dent->d_type, &vs->name);
2181 v9fs_string_free(&vs->name);
2182 vs->saved_dir_pos = vs->dent->d_off;
2183 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
2184 v9fs_readdir_post_readdir(s, vs);
2188 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
2189 vs->offset += vs->count;
2190 complete_pdu(s, vs->pdu, vs->offset);
2195 static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs)
2197 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
2198 v9fs_readdir_post_readdir(s, vs);
2202 static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs)
2204 vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
2205 v9fs_readdir_post_telldir(s, vs);
2209 static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu)
2212 V9fsReadDirState *vs;
2216 vs = qemu_malloc(sizeof(*vs));
2221 pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
2224 vs->fidp = lookup_fid(s, fid);
2225 if (vs->fidp == NULL || !(vs->fidp->fs.dir)) {
2230 if (vs->initial_offset == 0) {
2231 v9fs_do_rewinddir(s, vs->fidp->fs.dir);
2233 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset);
2236 v9fs_readdir_post_setdir(s, vs);
2240 complete_pdu(s, pdu, err);
2245 static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs,
2249 /* IO error return the error */
2253 vs->total += vs->len;
2254 vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
2255 if (vs->total < vs->count && vs->len > 0) {
2258 print_sg(vs->sg, vs->cnt);
2260 vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
2265 } while (vs->len == -1 && errno == EINTR);
2266 if (vs->len == -1) {
2269 v9fs_write_post_pwritev(s, vs, err);
2272 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
2275 complete_pdu(s, vs->pdu, err);
2279 static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs)
2286 xattr_len = vs->fidp->fs.xattr.len;
2287 write_count = xattr_len - vs->off;
2288 if (write_count > vs->count) {
2289 write_count = vs->count;
2290 } else if (write_count < 0) {
2292 * write beyond XATTR value len specified in
2298 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
2300 vs->fidp->fs.xattr.copied_len += write_count;
2302 * Now copy the content from sg list
2304 for (i = 0; i < vs->cnt; i++) {
2305 if (write_count > vs->sg[i].iov_len) {
2306 to_copy = vs->sg[i].iov_len;
2308 to_copy = write_count;
2310 memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
2311 vs->sg[i].iov_base, to_copy);
2312 /* updating vs->off since we are not using below */
2314 write_count -= to_copy;
2317 complete_pdu(s, vs->pdu, err);
2321 static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
2327 vs = qemu_malloc(sizeof(*vs));
2335 pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
2338 vs->fidp = lookup_fid(s, fid);
2339 if (vs->fidp == NULL) {
2344 if (vs->fidp->fid_type == P9_FID_FILE) {
2345 if (vs->fidp->fs.fd == -1) {
2349 } else if (vs->fidp->fid_type == P9_FID_XATTR) {
2351 * setxattr operation
2353 v9fs_xattr_write(s, vs);
2359 vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
2360 if (vs->total <= vs->count) {
2361 vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off);
2366 v9fs_write_post_pwritev(s, vs, err);
2370 complete_pdu(s, vs->pdu, err);
2374 static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs)
2377 v9fs_string_copy(&vs->fidp->path, &vs->fullname);
2378 stat_to_qid(&vs->stbuf, &vs->qid);
2380 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
2383 complete_pdu(s, vs->pdu, err);
2384 v9fs_string_free(&vs->name);
2385 v9fs_string_free(&vs->extension);
2386 v9fs_string_free(&vs->fullname);
2390 static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err)
2393 vs->iounit = get_iounit(s, &vs->fidp->path);
2394 v9fs_create_post_getiounit(s, vs);
2398 complete_pdu(s, vs->pdu, err);
2399 v9fs_string_free(&vs->name);
2400 v9fs_string_free(&vs->extension);
2401 v9fs_string_free(&vs->fullname);
2405 static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
2410 v9fs_post_create(s, vs, err);
2413 static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
2416 if (!vs->fidp->fs.dir) {
2419 vs->fidp->fid_type = P9_FID_DIR;
2420 v9fs_post_create(s, vs, err);
2423 static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
2431 vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname);
2432 v9fs_create_post_opendir(s, vs, err);
2436 v9fs_post_create(s, vs, err);
2439 static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
2446 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2447 v9fs_create_post_dir_lstat(s, vs, err);
2451 v9fs_post_create(s, vs, err);
2454 static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
2457 vs->fidp->fid_type = P9_FID_NONE;
2458 close(vs->fidp->fs.fd);
2461 v9fs_post_create(s, vs, err);
2465 static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
2467 if (vs->fidp->fs.fd == -1) {
2471 vs->fidp->fid_type = P9_FID_FILE;
2472 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
2473 v9fs_create_post_fstat(s, vs, err);
2478 v9fs_post_create(s, vs, err);
2482 static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
2485 if (err == 0 || errno != ENOENT) {
2490 if (vs->perm & P9_STAT_MODE_DIR) {
2491 err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
2493 v9fs_create_post_mkdir(s, vs, err);
2494 } else if (vs->perm & P9_STAT_MODE_SYMLINK) {
2495 err = v9fs_do_symlink(s, vs->fidp, vs->extension.data,
2496 vs->fullname.data, -1);
2497 v9fs_create_post_perms(s, vs, err);
2498 } else if (vs->perm & P9_STAT_MODE_LINK) {
2499 int32_t nfid = atoi(vs->extension.data);
2500 V9fsFidState *nfidp = lookup_fid(s, nfid);
2501 if (nfidp == NULL) {
2503 v9fs_post_create(s, vs, err);
2505 err = v9fs_do_link(s, &nfidp->path, &vs->fullname);
2506 v9fs_create_post_perms(s, vs, err);
2507 } else if (vs->perm & P9_STAT_MODE_DEVICE) {
2509 uint32_t major, minor;
2512 if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major,
2515 v9fs_post_create(s, vs, err);
2527 v9fs_post_create(s, vs, err);
2530 nmode |= vs->perm & 0777;
2531 err = v9fs_do_mknod(s, vs->fullname.data, nmode,
2532 makedev(major, minor), vs->fidp->uid, -1);
2533 v9fs_create_post_perms(s, vs, err);
2534 } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
2535 err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
2536 0, vs->fidp->uid, -1);
2537 v9fs_post_create(s, vs, err);
2538 } else if (vs->perm & P9_STAT_MODE_SOCKET) {
2539 err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
2540 0, vs->fidp->uid, -1);
2541 v9fs_post_create(s, vs, err);
2543 vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
2544 -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
2546 v9fs_create_post_open2(s, vs, err);
2552 v9fs_post_create(s, vs, err);
2555 static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
2558 V9fsCreateState *vs;
2561 vs = qemu_malloc(sizeof(*vs));
2565 v9fs_string_init(&vs->fullname);
2567 pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
2568 &vs->perm, &vs->mode, &vs->extension);
2570 vs->fidp = lookup_fid(s, fid);
2571 if (vs->fidp == NULL) {
2576 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
2579 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2580 v9fs_create_post_lstat(s, vs, err);
2584 complete_pdu(s, vs->pdu, err);
2585 v9fs_string_free(&vs->name);
2586 v9fs_string_free(&vs->extension);
2590 static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err)
2593 stat_to_qid(&vs->stbuf, &vs->qid);
2594 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
2599 complete_pdu(s, vs->pdu, err);
2600 v9fs_string_free(&vs->name);
2601 v9fs_string_free(&vs->symname);
2602 v9fs_string_free(&vs->fullname);
2606 static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs,
2612 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2614 v9fs_post_symlink(s, vs, err);
2617 static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu)
2620 V9fsSymlinkState *vs;
2624 vs = qemu_malloc(sizeof(*vs));
2628 v9fs_string_init(&vs->fullname);
2630 pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
2631 &vs->symname, &gid);
2633 vs->dfidp = lookup_fid(s, dfid);
2634 if (vs->dfidp == NULL) {
2639 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
2641 err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data,
2642 vs->fullname.data, gid);
2643 v9fs_symlink_post_do_symlink(s, vs, err);
2647 complete_pdu(s, vs->pdu, err);
2648 v9fs_string_free(&vs->name);
2649 v9fs_string_free(&vs->symname);
2653 static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
2655 /* A nop call with no return */
2656 complete_pdu(s, pdu, 7);
2659 static void v9fs_link(V9fsState *s, V9fsPDU *pdu)
2661 int32_t dfid, oldfid;
2662 V9fsFidState *dfidp, *oldfidp;
2663 V9fsString name, fullname;
2667 v9fs_string_init(&fullname);
2669 pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
2671 dfidp = lookup_fid(s, dfid);
2672 if (dfidp == NULL) {
2677 oldfidp = lookup_fid(s, oldfid);
2678 if (oldfidp == NULL) {
2683 v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
2685 err = v9fs_do_link(s, &oldfidp->path, &fullname);
2689 v9fs_string_free(&fullname);
2692 v9fs_string_free(&name);
2693 complete_pdu(s, pdu, err);
2696 static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
2705 /* For TREMOVE we need to clunk the fid even on failed remove */
2706 free_fid(s, vs->fidp->fid);
2708 complete_pdu(s, vs->pdu, err);
2712 static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
2715 V9fsRemoveState *vs;
2718 vs = qemu_malloc(sizeof(*vs));
2722 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
2724 vs->fidp = lookup_fid(s, fid);
2725 if (vs->fidp == NULL) {
2730 err = v9fs_do_remove(s, &vs->fidp->path);
2731 v9fs_remove_post_remove(s, vs, err);
2735 complete_pdu(s, pdu, err);
2739 static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err)
2748 v9fs_stat_free(&vs->v9stat);
2749 complete_pdu(s, vs->pdu, err);
2753 static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err)
2758 if (vs->v9stat.length != -1) {
2759 if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) {
2763 v9fs_wstat_post_truncate(s, vs, err);
2767 v9fs_stat_free(&vs->v9stat);
2768 complete_pdu(s, vs->pdu, err);
2772 static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs)
2775 char *old_name, *new_name;
2778 if (vs->newdirfid != -1) {
2779 V9fsFidState *dirfidp;
2780 dirfidp = lookup_fid(s, vs->newdirfid);
2782 if (dirfidp == NULL) {
2787 BUG_ON(dirfidp->fid_type != P9_FID_NONE);
2789 new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
2791 strcpy(new_name, dirfidp->path.data);
2792 strcat(new_name, "/");
2793 strcat(new_name + dirfidp->path.size, vs->name.data);
2795 old_name = vs->fidp->path.data;
2796 end = strrchr(old_name, '/');
2802 new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
2804 strncat(new_name, old_name, end - old_name);
2805 strncat(new_name + (end - old_name), vs->name.data, vs->name.size);
2808 v9fs_string_free(&vs->name);
2809 vs->name.data = qemu_strdup(new_name);
2810 vs->name.size = strlen(new_name);
2812 if (strcmp(new_name, vs->fidp->path.data) != 0) {
2813 if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
2818 * Fixup fid's pointing to the old name to
2819 * start pointing to the new name
2821 for (fidp = s->fid_list; fidp; fidp = fidp->next) {
2822 if (vs->fidp == fidp) {
2824 * we replace name of this fid towards the end so
2825 * that our below v9fs_path_is_ancestor check will
2830 if (v9fs_path_is_ancestor(&vs->fidp->path, &fidp->path)) {
2831 /* replace the name */
2832 v9fs_fix_path(&fidp->path, &vs->name,
2833 strlen(vs->fidp->path.data));
2836 v9fs_string_copy(&vs->fidp->path, &vs->name);
2840 v9fs_string_free(&vs->name);
2844 static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err)
2846 complete_pdu(s, vs->pdu, err);
2850 static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err)
2856 if (vs->v9stat.name.size != 0) {
2857 V9fsRenameState *vr;
2859 vr = qemu_mallocz(sizeof(V9fsRenameState));
2862 vr->fidp = vs->fidp;
2863 vr->offset = vs->offset;
2864 vr->name.size = vs->v9stat.name.size;
2865 vr->name.data = qemu_strdup(vs->v9stat.name.data);
2867 err = v9fs_complete_rename(s, vr);
2870 v9fs_wstat_post_rename(s, vs, err);
2874 v9fs_stat_free(&vs->v9stat);
2875 complete_pdu(s, vs->pdu, err);
2879 static void v9fs_rename(V9fsState *s, V9fsPDU *pdu)
2882 V9fsRenameState *vs;
2885 vs = qemu_malloc(sizeof(*vs));
2889 pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
2891 vs->fidp = lookup_fid(s, fid);
2892 if (vs->fidp == NULL) {
2897 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
2899 err = v9fs_complete_rename(s, vs);
2900 v9fs_rename_post_rename(s, vs, err);
2903 complete_pdu(s, vs->pdu, err);
2907 static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err)
2913 if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) {
2914 if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
2915 vs->v9stat.n_gid)) {
2919 v9fs_wstat_post_chown(s, vs, err);
2923 v9fs_stat_free(&vs->v9stat);
2924 complete_pdu(s, vs->pdu, err);
2928 static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err)
2934 if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) {
2935 struct timespec times[2];
2936 if (vs->v9stat.atime != -1) {
2937 times[0].tv_sec = vs->v9stat.atime;
2938 times[0].tv_nsec = 0;
2940 times[0].tv_nsec = UTIME_OMIT;
2942 if (vs->v9stat.mtime != -1) {
2943 times[1].tv_sec = vs->v9stat.mtime;
2944 times[1].tv_nsec = 0;
2946 times[1].tv_nsec = UTIME_OMIT;
2949 if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
2954 v9fs_wstat_post_utime(s, vs, err);
2958 v9fs_stat_free(&vs->v9stat);
2959 complete_pdu(s, vs->pdu, err);
2963 static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err)
2968 v9fs_stat_free(&vs->v9stat);
2969 complete_pdu(s, vs->pdu, err);
2973 static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err)
2982 v9_mode = stat_to_v9mode(&vs->stbuf);
2984 if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
2985 (v9_mode & P9_STAT_MODE_TYPE_BITS)) {
2986 /* Attempting to change the type */
2991 if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
2992 &vs->v9stat.extension))) {
2995 v9fs_wstat_post_chmod(s, vs, err);
2999 v9fs_stat_free(&vs->v9stat);
3000 complete_pdu(s, vs->pdu, err);
3004 static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
3010 vs = qemu_malloc(sizeof(*vs));
3014 pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
3016 vs->fidp = lookup_fid(s, fid);
3017 if (vs->fidp == NULL) {
3022 /* do we need to sync the file? */
3023 if (donttouch_stat(&vs->v9stat)) {
3024 err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
3025 v9fs_wstat_post_fsync(s, vs, err);
3029 if (vs->v9stat.mode != -1) {
3030 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
3031 v9fs_wstat_post_lstat(s, vs, err);
3035 v9fs_wstat_post_chmod(s, vs, err);
3039 v9fs_stat_free(&vs->v9stat);
3040 complete_pdu(s, vs->pdu, err);
3044 static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err)
3046 int32_t bsize_factor;
3054 * compute bsize factor based on host file system block size
3057 bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize;
3058 if (!bsize_factor) {
3061 vs->v9statfs.f_type = vs->stbuf.f_type;
3062 vs->v9statfs.f_bsize = vs->stbuf.f_bsize;
3063 vs->v9statfs.f_bsize *= bsize_factor;
3065 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
3066 * adjust(divide) the number of blocks, free blocks and available
3067 * blocks by bsize factor
3069 vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor;
3070 vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor;
3071 vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor;
3072 vs->v9statfs.f_files = vs->stbuf.f_files;
3073 vs->v9statfs.f_ffree = vs->stbuf.f_ffree;
3074 vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] |
3075 (unsigned long long)vs->stbuf.f_fsid.__val[1] << 32;
3076 vs->v9statfs.f_namelen = vs->stbuf.f_namelen;
3078 vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
3079 vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks,
3080 vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files,
3081 vs->v9statfs.f_ffree, vs->v9statfs.fsid_val,
3082 vs->v9statfs.f_namelen);
3085 complete_pdu(s, vs->pdu, vs->offset);
3089 static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu)
3091 V9fsStatfsState *vs;
3094 vs = qemu_malloc(sizeof(*vs));
3098 memset(&vs->v9statfs, 0, sizeof(vs->v9statfs));
3100 pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
3102 vs->fidp = lookup_fid(s, vs->fid);
3103 if (vs->fidp == NULL) {
3108 err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf);
3109 v9fs_statfs_post_statfs(s, vs, err);
3113 complete_pdu(s, vs->pdu, err);
3117 static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
3124 stat_to_qid(&vs->stbuf, &vs->qid);
3125 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
3128 complete_pdu(s, vs->pdu, err);
3129 v9fs_string_free(&vs->fullname);
3130 v9fs_string_free(&vs->name);
3134 static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err)
3141 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
3142 v9fs_mknod_post_lstat(s, vs, err);
3145 complete_pdu(s, vs->pdu, err);
3146 v9fs_string_free(&vs->fullname);
3147 v9fs_string_free(&vs->name);
3151 static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu)
3161 vs = qemu_malloc(sizeof(*vs));
3165 v9fs_string_init(&vs->fullname);
3166 pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
3167 &major, &minor, &gid);
3169 fidp = lookup_fid(s, fid);
3175 v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
3176 err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor),
3178 v9fs_mknod_post_mknod(s, vs, err);
3182 complete_pdu(s, vs->pdu, err);
3183 v9fs_string_free(&vs->fullname);
3184 v9fs_string_free(&vs->name);
3189 * Implement posix byte range locking code
3190 * Server side handling of locking code is very simple, because 9p server in
3191 * QEMU can handle only one client. And most of the lock handling
3192 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
3193 * do any thing in * qemu 9p server side lock code path.
3194 * So when a TLOCK request comes, always return success
3197 static void v9fs_lock(V9fsState *s, V9fsPDU *pdu)
3199 int32_t fid, err = 0;
3202 vs = qemu_mallocz(sizeof(*vs));
3206 vs->flock = qemu_malloc(sizeof(*vs->flock));
3207 pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
3208 &vs->flock->flags, &vs->flock->start, &vs->flock->length,
3209 &vs->flock->proc_id, &vs->flock->client_id);
3211 vs->status = P9_LOCK_ERROR;
3213 /* We support only block flag now (that too ignored currently) */
3214 if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
3218 vs->fidp = lookup_fid(s, fid);
3219 if (vs->fidp == NULL) {
3224 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
3229 vs->status = P9_LOCK_SUCCESS;
3231 vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
3232 complete_pdu(s, vs->pdu, err);
3233 qemu_free(vs->flock);
3238 * When a TGETLOCK request comes, always return success because all lock
3239 * handling is done by client's VFS layer.
3242 static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu)
3244 int32_t fid, err = 0;
3245 V9fsGetlockState *vs;
3247 vs = qemu_mallocz(sizeof(*vs));
3251 vs->glock = qemu_malloc(sizeof(*vs->glock));
3252 pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
3253 &vs->glock->start, &vs->glock->length, &vs->glock->proc_id,
3254 &vs->glock->client_id);
3256 vs->fidp = lookup_fid(s, fid);
3257 if (vs->fidp == NULL) {
3262 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
3267 vs->glock->type = F_UNLCK;
3268 vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
3269 vs->glock->start, vs->glock->length, vs->glock->proc_id,
3270 &vs->glock->client_id);
3272 complete_pdu(s, vs->pdu, err);
3273 qemu_free(vs->glock);
3277 static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
3284 stat_to_qid(&vs->stbuf, &vs->qid);
3285 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
3288 complete_pdu(s, vs->pdu, err);
3289 v9fs_string_free(&vs->fullname);
3290 v9fs_string_free(&vs->name);
3294 static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err)
3301 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
3302 v9fs_mkdir_post_lstat(s, vs, err);
3305 complete_pdu(s, vs->pdu, err);
3306 v9fs_string_free(&vs->fullname);
3307 v9fs_string_free(&vs->name);
3311 static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu)
3320 vs = qemu_malloc(sizeof(*vs));
3324 v9fs_string_init(&vs->fullname);
3325 pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
3328 fidp = lookup_fid(s, fid);
3334 v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
3335 err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid);
3336 v9fs_mkdir_post_mkdir(s, vs, err);
3340 complete_pdu(s, vs->pdu, err);
3341 v9fs_string_free(&vs->fullname);
3342 v9fs_string_free(&vs->name);
3346 static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err)
3351 free_fid(s, vs->xattr_fidp->fid);
3354 vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
3357 complete_pdu(s, vs->pdu, err);
3358 v9fs_string_free(&vs->name);
3363 static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err)
3367 free_fid(s, vs->xattr_fidp->fid);
3371 * Read the xattr value
3373 vs->xattr_fidp->fs.xattr.len = vs->size;
3374 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3375 vs->xattr_fidp->fs.xattr.copied_len = -1;
3377 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3378 err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
3379 &vs->name, vs->xattr_fidp->fs.xattr.value,
3380 vs->xattr_fidp->fs.xattr.len);
3382 v9fs_post_xattr_getvalue(s, vs, err);
3385 complete_pdu(s, vs->pdu, err);
3386 v9fs_string_free(&vs->name);
3390 static void v9fs_post_lxattr_getvalue(V9fsState *s,
3391 V9fsXattrState *vs, int err)
3395 free_fid(s, vs->xattr_fidp->fid);
3398 vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
3401 complete_pdu(s, vs->pdu, err);
3402 v9fs_string_free(&vs->name);
3407 static void v9fs_post_lxattr_check(V9fsState *s,
3408 V9fsXattrState *vs, ssize_t err)
3412 free_fid(s, vs->xattr_fidp->fid);
3416 * Read the xattr value
3418 vs->xattr_fidp->fs.xattr.len = vs->size;
3419 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3420 vs->xattr_fidp->fs.xattr.copied_len = -1;
3422 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3423 err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
3424 vs->xattr_fidp->fs.xattr.value,
3425 vs->xattr_fidp->fs.xattr.len);
3427 v9fs_post_lxattr_getvalue(s, vs, err);
3430 complete_pdu(s, vs->pdu, err);
3431 v9fs_string_free(&vs->name);
3435 static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu)
3439 int32_t fid, newfid;
3441 vs = qemu_malloc(sizeof(*vs));
3445 pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
3446 vs->file_fidp = lookup_fid(s, fid);
3447 if (vs->file_fidp == NULL) {
3452 vs->xattr_fidp = alloc_fid(s, newfid);
3453 if (vs->xattr_fidp == NULL) {
3458 v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path);
3459 if (vs->name.data[0] == 0) {
3461 * listxattr request. Get the size first
3463 vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
3468 v9fs_post_lxattr_check(s, vs, err);
3472 * specific xattr fid. We check for xattr
3473 * presence also collect the xattr size
3475 vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
3476 &vs->name, NULL, 0);
3480 v9fs_post_xattr_check(s, vs, err);
3484 complete_pdu(s, vs->pdu, err);
3485 v9fs_string_free(&vs->name);
3489 static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu)
3496 vs = qemu_malloc(sizeof(*vs));
3500 pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
3501 &fid, &vs->name, &vs->size, &flags);
3503 vs->file_fidp = lookup_fid(s, fid);
3504 if (vs->file_fidp == NULL) {
3509 /* Make the file fid point to xattr */
3510 vs->xattr_fidp = vs->file_fidp;
3511 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3512 vs->xattr_fidp->fs.xattr.copied_len = 0;
3513 vs->xattr_fidp->fs.xattr.len = vs->size;
3514 vs->xattr_fidp->fs.xattr.flags = flags;
3515 v9fs_string_init(&vs->xattr_fidp->fs.xattr.name);
3516 v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name);
3518 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3520 vs->xattr_fidp->fs.xattr.value = NULL;
3523 complete_pdu(s, vs->pdu, err);
3524 v9fs_string_free(&vs->name);
3528 static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs,
3535 vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
3538 complete_pdu(s, vs->pdu, err);
3539 v9fs_string_free(&vs->target);
3543 static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu)
3546 V9fsReadLinkState *vs;
3550 vs = qemu_malloc(sizeof(*vs));
3554 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
3556 fidp = lookup_fid(s, fid);
3562 v9fs_string_init(&vs->target);
3563 err = v9fs_do_readlink(s, &fidp->path, &vs->target);
3564 v9fs_readlink_post_readlink(s, vs, err);
3567 complete_pdu(s, vs->pdu, err);
3571 typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
3573 static pdu_handler_t *pdu_handlers[] = {
3574 [P9_TREADDIR] = v9fs_readdir,
3575 [P9_TSTATFS] = v9fs_statfs,
3576 [P9_TGETATTR] = v9fs_getattr,
3577 [P9_TSETATTR] = v9fs_setattr,
3578 [P9_TXATTRWALK] = v9fs_xattrwalk,
3579 [P9_TXATTRCREATE] = v9fs_xattrcreate,
3580 [P9_TMKNOD] = v9fs_mknod,
3581 [P9_TRENAME] = v9fs_rename,
3582 [P9_TLOCK] = v9fs_lock,
3583 [P9_TGETLOCK] = v9fs_getlock,
3584 [P9_TREADLINK] = v9fs_readlink,
3585 [P9_TMKDIR] = v9fs_mkdir,
3586 [P9_TVERSION] = v9fs_version,
3587 [P9_TLOPEN] = v9fs_open,
3588 [P9_TATTACH] = v9fs_attach,
3589 [P9_TSTAT] = v9fs_stat,
3590 [P9_TWALK] = v9fs_walk,
3591 [P9_TCLUNK] = v9fs_clunk,
3592 [P9_TFSYNC] = v9fs_fsync,
3593 [P9_TOPEN] = v9fs_open,
3594 [P9_TREAD] = v9fs_read,
3596 [P9_TAUTH] = v9fs_auth,
3598 [P9_TFLUSH] = v9fs_flush,
3599 [P9_TLINK] = v9fs_link,
3600 [P9_TSYMLINK] = v9fs_symlink,
3601 [P9_TCREATE] = v9fs_create,
3602 [P9_TLCREATE] = v9fs_lcreate,
3603 [P9_TWRITE] = v9fs_write,
3604 [P9_TWSTAT] = v9fs_wstat,
3605 [P9_TREMOVE] = v9fs_remove,
3608 static void v9fs_op_not_supp(V9fsState *s, V9fsPDU *pdu)
3610 complete_pdu(s, pdu, -EOPNOTSUPP);
3613 static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
3615 pdu_handler_t *handler;
3620 if (pdu->id >= ARRAY_SIZE(pdu_handlers) ||
3621 (pdu_handlers[pdu->id] == NULL)) {
3622 handler = v9fs_op_not_supp;
3624 handler = pdu_handlers[pdu->id];
3629 void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
3631 V9fsState *s = (V9fsState *)vdev;
3635 while ((pdu = alloc_pdu(s)) &&
3636 (len = virtqueue_pop(vq, &pdu->elem)) != 0) {
3639 BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
3640 BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
3642 ptr = pdu->elem.out_sg[0].iov_base;
3644 memcpy(&pdu->size, ptr, 4);
3646 memcpy(&pdu->tag, ptr + 5, 2);