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.
16 #include "qemu_socket.h"
17 #include "virtio-9p.h"
18 #include "fsdev/qemu-fsdev.h"
19 #include "virtio-9p-debug.h"
20 #include "virtio-9p-xattr.h"
36 static int omode_to_uflags(int8_t mode)
70 void cred_init(FsCred *credp)
78 static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
80 return s->ops->lstat(&s->ctx, path->data, stbuf);
83 static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
87 buf->data = qemu_malloc(1024);
89 len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1);
98 static int v9fs_do_close(V9fsState *s, int fd)
100 return s->ops->close(&s->ctx, fd);
103 static int v9fs_do_closedir(V9fsState *s, DIR *dir)
105 return s->ops->closedir(&s->ctx, dir);
108 static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags)
110 return s->ops->open(&s->ctx, path->data, flags);
113 static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
115 return s->ops->opendir(&s->ctx, path->data);
118 static void v9fs_do_rewinddir(V9fsState *s, DIR *dir)
120 return s->ops->rewinddir(&s->ctx, dir);
123 static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
125 return s->ops->telldir(&s->ctx, dir);
128 static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir)
130 return s->ops->readdir(&s->ctx, dir);
133 static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off)
135 return s->ops->seekdir(&s->ctx, dir, off);
138 static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov,
139 int iovcnt, int64_t offset)
141 return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
144 static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov,
145 int iovcnt, int64_t offset)
147 return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset);
150 static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
155 return s->ops->chmod(&s->ctx, path->data, &cred);
158 static int v9fs_do_mknod(V9fsState *s, char *name,
159 mode_t mode, dev_t dev, uid_t uid, gid_t gid)
167 return s->ops->mknod(&s->ctx, name, &cred);
170 static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode,
171 uid_t uid, gid_t gid)
180 return s->ops->mkdir(&s->ctx, name, &cred);
183 static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
185 return s->ops->fstat(&s->ctx, fd, stbuf);
188 static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid,
196 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);
426 static size_t v9fs_string_size(V9fsString *str)
431 static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
435 for (f = s->fid_list; f; f = f->next) {
444 static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
448 f = lookup_fid(s, fid);
453 f = qemu_mallocz(sizeof(V9fsFidState));
456 f->fid_type = P9_FID_NONE;
458 f->next = s->fid_list;
464 static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp)
468 if (fidp->fs.xattr.copied_len == -1) {
469 /* getxattr/listxattr fid */
473 * if this is fid for setxattr. clunk should
474 * result in setxattr localcall
476 if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
477 /* clunk after partial write */
481 if (fidp->fs.xattr.len) {
482 retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name,
483 fidp->fs.xattr.value,
485 fidp->fs.xattr.flags);
487 retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name);
490 v9fs_string_free(&fidp->fs.xattr.name);
492 if (fidp->fs.xattr.value) {
493 qemu_free(fidp->fs.xattr.value);
498 static int free_fid(V9fsState *s, int32_t fid)
501 V9fsFidState **fidpp, *fidp;
503 for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
504 if ((*fidpp)->fid == fid) {
509 if (*fidpp == NULL) {
516 if (fidp->fid_type == P9_FID_FILE) {
517 v9fs_do_close(s, fidp->fs.fd);
518 } else if (fidp->fid_type == P9_FID_DIR) {
519 v9fs_do_closedir(s, fidp->fs.dir);
520 } else if (fidp->fid_type == P9_FID_XATTR) {
521 retval = v9fs_xattr_fid_clunk(s, fidp);
523 v9fs_string_free(&fidp->path);
529 #define P9_QID_TYPE_DIR 0x80
530 #define P9_QID_TYPE_SYMLINK 0x02
532 #define P9_STAT_MODE_DIR 0x80000000
533 #define P9_STAT_MODE_APPEND 0x40000000
534 #define P9_STAT_MODE_EXCL 0x20000000
535 #define P9_STAT_MODE_MOUNT 0x10000000
536 #define P9_STAT_MODE_AUTH 0x08000000
537 #define P9_STAT_MODE_TMP 0x04000000
538 #define P9_STAT_MODE_SYMLINK 0x02000000
539 #define P9_STAT_MODE_LINK 0x01000000
540 #define P9_STAT_MODE_DEVICE 0x00800000
541 #define P9_STAT_MODE_NAMED_PIPE 0x00200000
542 #define P9_STAT_MODE_SOCKET 0x00100000
543 #define P9_STAT_MODE_SETUID 0x00080000
544 #define P9_STAT_MODE_SETGID 0x00040000
545 #define P9_STAT_MODE_SETVTX 0x00010000
547 #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
548 P9_STAT_MODE_SYMLINK | \
549 P9_STAT_MODE_LINK | \
550 P9_STAT_MODE_DEVICE | \
551 P9_STAT_MODE_NAMED_PIPE | \
554 /* This is the algorithm from ufs in spfs */
555 static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
559 size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
560 memcpy(&qidp->path, &stbuf->st_ino, size);
561 qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
563 if (S_ISDIR(stbuf->st_mode)) {
564 qidp->type |= P9_QID_TYPE_DIR;
566 if (S_ISLNK(stbuf->st_mode)) {
567 qidp->type |= P9_QID_TYPE_SYMLINK;
571 static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp)
576 err = v9fs_do_lstat(s, &fidp->path, &stbuf);
581 stat_to_qid(&stbuf, qidp);
585 static V9fsPDU *alloc_pdu(V9fsState *s)
589 if (!QLIST_EMPTY(&s->free_list)) {
590 pdu = QLIST_FIRST(&s->free_list);
591 QLIST_REMOVE(pdu, next);
596 static void free_pdu(V9fsState *s, V9fsPDU *pdu)
599 QLIST_INSERT_HEAD(&s->free_list, pdu, next);
603 size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
604 size_t offset, size_t size, int pack)
609 for (i = 0; size && i < sg_count; i++) {
611 if (offset >= sg[i].iov_len) {
613 offset -= sg[i].iov_len;
616 len = MIN(sg[i].iov_len - offset, size);
618 memcpy(sg[i].iov_base + offset, addr, len);
620 memcpy(addr, sg[i].iov_base + offset, len);
635 static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size)
637 return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
641 static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src,
644 return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num,
648 static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg)
652 struct iovec *src_sg;
656 src_sg = pdu->elem.in_sg;
657 num = pdu->elem.in_num;
659 src_sg = pdu->elem.out_sg;
660 num = pdu->elem.out_num;
664 for (i = 0; i < num; i++) {
666 sg[j].iov_base = src_sg[i].iov_base;
667 sg[j].iov_len = src_sg[i].iov_len;
669 } else if (offset < (src_sg[i].iov_len + pos)) {
670 sg[j].iov_base = src_sg[i].iov_base;
671 sg[j].iov_len = src_sg[i].iov_len;
672 sg[j].iov_base += (offset - pos);
673 sg[j].iov_len -= (offset - pos);
676 pos += src_sg[i].iov_len;
682 static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
684 size_t old_offset = offset;
689 for (i = 0; fmt[i]; i++) {
692 uint8_t *valp = va_arg(ap, uint8_t *);
693 offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
698 valp = va_arg(ap, uint16_t *);
699 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
700 *valp = le16_to_cpu(val);
705 valp = va_arg(ap, uint32_t *);
706 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
707 *valp = le32_to_cpu(val);
712 valp = va_arg(ap, uint64_t *);
713 offset += pdu_unpack(&val, pdu, offset, sizeof(val));
714 *valp = le64_to_cpu(val);
718 struct iovec *iov = va_arg(ap, struct iovec *);
719 int *iovcnt = va_arg(ap, int *);
720 *iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
724 V9fsString *str = va_arg(ap, V9fsString *);
725 offset += pdu_unmarshal(pdu, offset, "w", &str->size);
726 /* FIXME: sanity check str->size */
727 str->data = qemu_malloc(str->size + 1);
728 offset += pdu_unpack(str->data, pdu, offset, str->size);
729 str->data[str->size] = 0;
733 V9fsQID *qidp = va_arg(ap, V9fsQID *);
734 offset += pdu_unmarshal(pdu, offset, "bdq",
735 &qidp->type, &qidp->version, &qidp->path);
739 V9fsStat *statp = va_arg(ap, V9fsStat *);
740 offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
741 &statp->size, &statp->type, &statp->dev,
742 &statp->qid, &statp->mode, &statp->atime,
743 &statp->mtime, &statp->length,
744 &statp->name, &statp->uid, &statp->gid,
745 &statp->muid, &statp->extension,
746 &statp->n_uid, &statp->n_gid,
751 V9fsIattr *iattr = va_arg(ap, V9fsIattr *);
752 offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
753 &iattr->valid, &iattr->mode,
754 &iattr->uid, &iattr->gid, &iattr->size,
755 &iattr->atime_sec, &iattr->atime_nsec,
756 &iattr->mtime_sec, &iattr->mtime_nsec);
766 return offset - old_offset;
769 static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
771 size_t old_offset = offset;
776 for (i = 0; fmt[i]; i++) {
779 uint8_t val = va_arg(ap, int);
780 offset += pdu_pack(pdu, offset, &val, sizeof(val));
785 cpu_to_le16w(&val, va_arg(ap, int));
786 offset += pdu_pack(pdu, offset, &val, sizeof(val));
791 cpu_to_le32w(&val, va_arg(ap, uint32_t));
792 offset += pdu_pack(pdu, offset, &val, sizeof(val));
797 cpu_to_le64w(&val, va_arg(ap, uint64_t));
798 offset += pdu_pack(pdu, offset, &val, sizeof(val));
802 struct iovec *iov = va_arg(ap, struct iovec *);
803 int *iovcnt = va_arg(ap, int *);
804 *iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
808 V9fsString *str = va_arg(ap, V9fsString *);
809 offset += pdu_marshal(pdu, offset, "w", str->size);
810 offset += pdu_pack(pdu, offset, str->data, str->size);
814 V9fsQID *qidp = va_arg(ap, V9fsQID *);
815 offset += pdu_marshal(pdu, offset, "bdq",
816 qidp->type, qidp->version, qidp->path);
820 V9fsStat *statp = va_arg(ap, V9fsStat *);
821 offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
822 statp->size, statp->type, statp->dev,
823 &statp->qid, statp->mode, statp->atime,
824 statp->mtime, statp->length, &statp->name,
825 &statp->uid, &statp->gid, &statp->muid,
826 &statp->extension, statp->n_uid,
827 statp->n_gid, statp->n_muid);
831 V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
832 offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
833 statp->st_result_mask,
834 &statp->qid, statp->st_mode,
835 statp->st_uid, statp->st_gid,
836 statp->st_nlink, statp->st_rdev,
837 statp->st_size, statp->st_blksize, statp->st_blocks,
838 statp->st_atime_sec, statp->st_atime_nsec,
839 statp->st_mtime_sec, statp->st_mtime_nsec,
840 statp->st_ctime_sec, statp->st_ctime_nsec,
841 statp->st_btime_sec, statp->st_btime_nsec,
842 statp->st_gen, statp->st_data_version);
851 return offset - old_offset;
854 static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
856 int8_t id = pdu->id + 1; /* Response */
862 if (s->proto_version != V9FS_PROTO_2000L) {
865 str.data = strerror(err);
866 str.size = strlen(str.data);
868 len += pdu_marshal(pdu, len, "s", &str);
872 len += pdu_marshal(pdu, len, "d", err);
874 if (s->proto_version == V9FS_PROTO_2000L) {
879 /* fill out the header */
880 pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
882 /* keep these in sync */
886 /* push onto queue and notify */
887 virtqueue_push(s->vq, &pdu->elem, len);
889 /* FIXME: we should batch these completions */
890 virtio_notify(&s->vdev, s->vq);
895 static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
900 if (mode & P9_STAT_MODE_DIR) {
904 if (mode & P9_STAT_MODE_SYMLINK) {
907 if (mode & P9_STAT_MODE_SOCKET) {
910 if (mode & P9_STAT_MODE_NAMED_PIPE) {
913 if (mode & P9_STAT_MODE_DEVICE) {
914 if (extension && extension->data[0] == 'c') {
925 if (mode & P9_STAT_MODE_SETUID) {
928 if (mode & P9_STAT_MODE_SETGID) {
931 if (mode & P9_STAT_MODE_SETVTX) {
938 static int donttouch_stat(V9fsStat *stat)
940 if (stat->type == -1 &&
942 stat->qid.type == -1 &&
943 stat->qid.version == -1 &&
944 stat->qid.path == -1 &&
948 stat->length == -1 &&
955 stat->n_muid == -1) {
962 static void v9fs_stat_free(V9fsStat *stat)
964 v9fs_string_free(&stat->name);
965 v9fs_string_free(&stat->uid);
966 v9fs_string_free(&stat->gid);
967 v9fs_string_free(&stat->muid);
968 v9fs_string_free(&stat->extension);
971 static uint32_t stat_to_v9mode(const struct stat *stbuf)
975 mode = stbuf->st_mode & 0777;
976 if (S_ISDIR(stbuf->st_mode)) {
977 mode |= P9_STAT_MODE_DIR;
980 if (S_ISLNK(stbuf->st_mode)) {
981 mode |= P9_STAT_MODE_SYMLINK;
984 if (S_ISSOCK(stbuf->st_mode)) {
985 mode |= P9_STAT_MODE_SOCKET;
988 if (S_ISFIFO(stbuf->st_mode)) {
989 mode |= P9_STAT_MODE_NAMED_PIPE;
992 if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
993 mode |= P9_STAT_MODE_DEVICE;
996 if (stbuf->st_mode & S_ISUID) {
997 mode |= P9_STAT_MODE_SETUID;
1000 if (stbuf->st_mode & S_ISGID) {
1001 mode |= P9_STAT_MODE_SETGID;
1004 if (stbuf->st_mode & S_ISVTX) {
1005 mode |= P9_STAT_MODE_SETVTX;
1011 static int stat_to_v9stat(V9fsState *s, V9fsString *name,
1012 const struct stat *stbuf,
1018 memset(v9stat, 0, sizeof(*v9stat));
1020 stat_to_qid(stbuf, &v9stat->qid);
1021 v9stat->mode = stat_to_v9mode(stbuf);
1022 v9stat->atime = stbuf->st_atime;
1023 v9stat->mtime = stbuf->st_mtime;
1024 v9stat->length = stbuf->st_size;
1026 v9fs_string_null(&v9stat->uid);
1027 v9fs_string_null(&v9stat->gid);
1028 v9fs_string_null(&v9stat->muid);
1030 v9stat->n_uid = stbuf->st_uid;
1031 v9stat->n_gid = stbuf->st_gid;
1034 v9fs_string_null(&v9stat->extension);
1036 if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
1037 err = v9fs_do_readlink(s, name, &v9stat->extension);
1042 v9stat->extension.data[err] = 0;
1043 v9stat->extension.size = err;
1044 } else if (v9stat->mode & P9_STAT_MODE_DEVICE) {
1045 v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
1046 S_ISCHR(stbuf->st_mode) ? 'c' : 'b',
1047 major(stbuf->st_rdev), minor(stbuf->st_rdev));
1048 } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) {
1049 v9fs_string_sprintf(&v9stat->extension, "%s %lu",
1050 "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink);
1053 str = strrchr(name->data, '/');
1060 v9fs_string_sprintf(&v9stat->name, "%s", str);
1063 v9fs_string_size(&v9stat->name) +
1064 v9fs_string_size(&v9stat->uid) +
1065 v9fs_string_size(&v9stat->gid) +
1066 v9fs_string_size(&v9stat->muid) +
1067 v9fs_string_size(&v9stat->extension);
1071 #define P9_STATS_MODE 0x00000001ULL
1072 #define P9_STATS_NLINK 0x00000002ULL
1073 #define P9_STATS_UID 0x00000004ULL
1074 #define P9_STATS_GID 0x00000008ULL
1075 #define P9_STATS_RDEV 0x00000010ULL
1076 #define P9_STATS_ATIME 0x00000020ULL
1077 #define P9_STATS_MTIME 0x00000040ULL
1078 #define P9_STATS_CTIME 0x00000080ULL
1079 #define P9_STATS_INO 0x00000100ULL
1080 #define P9_STATS_SIZE 0x00000200ULL
1081 #define P9_STATS_BLOCKS 0x00000400ULL
1083 #define P9_STATS_BTIME 0x00000800ULL
1084 #define P9_STATS_GEN 0x00001000ULL
1085 #define P9_STATS_DATA_VERSION 0x00002000ULL
1087 #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
1088 #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
1091 static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf,
1092 V9fsStatDotl *v9lstat)
1094 memset(v9lstat, 0, sizeof(*v9lstat));
1096 v9lstat->st_mode = stbuf->st_mode;
1097 v9lstat->st_nlink = stbuf->st_nlink;
1098 v9lstat->st_uid = stbuf->st_uid;
1099 v9lstat->st_gid = stbuf->st_gid;
1100 v9lstat->st_rdev = stbuf->st_rdev;
1101 v9lstat->st_size = stbuf->st_size;
1102 v9lstat->st_blksize = stbuf->st_blksize;
1103 v9lstat->st_blocks = stbuf->st_blocks;
1104 v9lstat->st_atime_sec = stbuf->st_atime;
1105 v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec;
1106 v9lstat->st_mtime_sec = stbuf->st_mtime;
1107 v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec;
1108 v9lstat->st_ctime_sec = stbuf->st_ctime;
1109 v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec;
1110 /* Currently we only support BASIC fields in stat */
1111 v9lstat->st_result_mask = P9_STATS_BASIC;
1113 stat_to_qid(stbuf, &v9lstat->qid);
1116 static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt)
1118 while (len && *iovcnt) {
1119 if (len < sg->iov_len) {
1121 sg->iov_base += len;
1133 static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt)
1138 for (i = 0; i < *cnt; i++) {
1139 if ((total + sg[i].iov_len) > cap) {
1140 sg[i].iov_len -= ((total + sg[i].iov_len) - cap);
1144 total += sg[i].iov_len;
1152 static void print_sg(struct iovec *sg, int cnt)
1156 printf("sg[%d]: {", cnt);
1157 for (i = 0; i < cnt; i++) {
1161 printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
1166 static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len)
1169 v9fs_string_init(&str);
1170 v9fs_string_copy(&str, dst);
1171 v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
1172 v9fs_string_free(&str);
1175 static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
1180 pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
1182 if (!strcmp(version.data, "9P2000.u")) {
1183 s->proto_version = V9FS_PROTO_2000U;
1184 } else if (!strcmp(version.data, "9P2000.L")) {
1185 s->proto_version = V9FS_PROTO_2000L;
1187 v9fs_string_sprintf(&version, "unknown");
1190 offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
1191 complete_pdu(s, pdu, offset);
1193 v9fs_string_free(&version);
1196 static void v9fs_attach(V9fsState *s, V9fsPDU *pdu)
1198 int32_t fid, afid, n_uname;
1199 V9fsString uname, aname;
1205 pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
1207 fidp = alloc_fid(s, fid);
1213 fidp->uid = n_uname;
1215 v9fs_string_sprintf(&fidp->path, "%s", "/");
1216 err = fid_to_qid(s, fidp, &qid);
1223 offset += pdu_marshal(pdu, offset, "Q", &qid);
1227 complete_pdu(s, pdu, err);
1228 v9fs_string_free(&uname);
1229 v9fs_string_free(&aname);
1232 static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err)
1239 err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat);
1243 vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat);
1247 complete_pdu(s, vs->pdu, err);
1248 v9fs_stat_free(&vs->v9stat);
1252 static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
1258 vs = qemu_malloc(sizeof(*vs));
1262 memset(&vs->v9stat, 0, sizeof(vs->v9stat));
1264 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
1266 vs->fidp = lookup_fid(s, fid);
1267 if (vs->fidp == NULL) {
1272 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1273 v9fs_stat_post_lstat(s, vs, err);
1277 complete_pdu(s, vs->pdu, err);
1278 v9fs_stat_free(&vs->v9stat);
1282 static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs,
1290 stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl);
1291 vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
1295 complete_pdu(s, vs->pdu, err);
1299 static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu)
1302 V9fsStatStateDotl *vs;
1305 uint64_t request_mask;
1307 vs = qemu_malloc(sizeof(*vs));
1311 memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl));
1313 pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
1315 fidp = lookup_fid(s, fid);
1321 /* Currently we only support BASIC fields in stat, so there is no
1322 * need to look at request_mask.
1324 err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf);
1325 v9fs_getattr_post_lstat(s, vs, err);
1329 complete_pdu(s, vs->pdu, err);
1333 /* From Linux kernel code */
1334 #define ATTR_MODE (1 << 0)
1335 #define ATTR_UID (1 << 1)
1336 #define ATTR_GID (1 << 2)
1337 #define ATTR_SIZE (1 << 3)
1338 #define ATTR_ATIME (1 << 4)
1339 #define ATTR_MTIME (1 << 5)
1340 #define ATTR_CTIME (1 << 6)
1341 #define ATTR_MASK 127
1342 #define ATTR_ATIME_SET (1 << 7)
1343 #define ATTR_MTIME_SET (1 << 8)
1345 static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs,
1355 complete_pdu(s, vs->pdu, err);
1359 static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err)
1366 if (vs->v9iattr.valid & (ATTR_SIZE)) {
1367 err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size);
1369 v9fs_setattr_post_truncate(s, vs, err);
1373 complete_pdu(s, vs->pdu, err);
1377 static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs,
1385 /* If the only valid entry in iattr is ctime we can call
1386 * chown(-1,-1) to update the ctime of the file
1388 if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
1389 ((vs->v9iattr.valid & ATTR_CTIME)
1390 && !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) {
1391 if (!(vs->v9iattr.valid & ATTR_UID)) {
1392 vs->v9iattr.uid = -1;
1394 if (!(vs->v9iattr.valid & ATTR_GID)) {
1395 vs->v9iattr.gid = -1;
1397 err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid,
1400 v9fs_setattr_post_chown(s, vs, err);
1404 complete_pdu(s, vs->pdu, err);
1408 static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err)
1415 if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
1416 struct timespec times[2];
1417 if (vs->v9iattr.valid & ATTR_ATIME) {
1418 if (vs->v9iattr.valid & ATTR_ATIME_SET) {
1419 times[0].tv_sec = vs->v9iattr.atime_sec;
1420 times[0].tv_nsec = vs->v9iattr.atime_nsec;
1422 times[0].tv_nsec = UTIME_NOW;
1425 times[0].tv_nsec = UTIME_OMIT;
1428 if (vs->v9iattr.valid & ATTR_MTIME) {
1429 if (vs->v9iattr.valid & ATTR_MTIME_SET) {
1430 times[1].tv_sec = vs->v9iattr.mtime_sec;
1431 times[1].tv_nsec = vs->v9iattr.mtime_nsec;
1433 times[1].tv_nsec = UTIME_NOW;
1436 times[1].tv_nsec = UTIME_OMIT;
1438 err = v9fs_do_utimensat(s, &vs->fidp->path, times);
1440 v9fs_setattr_post_utimensat(s, vs, err);
1444 complete_pdu(s, vs->pdu, err);
1448 static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu)
1451 V9fsSetattrState *vs;
1454 vs = qemu_malloc(sizeof(*vs));
1458 pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
1460 vs->fidp = lookup_fid(s, fid);
1461 if (vs->fidp == NULL) {
1466 if (vs->v9iattr.valid & ATTR_MODE) {
1467 err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode);
1470 v9fs_setattr_post_chmod(s, vs, err);
1474 complete_pdu(s, vs->pdu, err);
1478 static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err)
1480 complete_pdu(s, vs->pdu, err);
1483 for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) {
1484 v9fs_string_free(&vs->wnames[vs->name_idx]);
1487 qemu_free(vs->wnames);
1488 qemu_free(vs->qids);
1492 static void v9fs_walk_marshal(V9fsWalkState *vs)
1496 vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
1498 for (i = 0; i < vs->nwnames; i++) {
1499 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
1503 static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
1507 free_fid(s, vs->newfidp->fid);
1508 v9fs_string_free(&vs->path);
1513 stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
1516 if (vs->name_idx < vs->nwnames) {
1517 v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
1518 vs->wnames[vs->name_idx].data);
1519 v9fs_string_copy(&vs->newfidp->path, &vs->path);
1521 err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
1522 v9fs_walk_post_newfid_lstat(s, vs, err);
1526 v9fs_string_free(&vs->path);
1527 v9fs_walk_marshal(vs);
1530 v9fs_walk_complete(s, vs, err);
1533 static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs,
1537 v9fs_string_free(&vs->path);
1542 stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
1544 if (vs->name_idx < vs->nwnames) {
1546 v9fs_string_sprintf(&vs->path, "%s/%s",
1547 vs->fidp->path.data, vs->wnames[vs->name_idx].data);
1548 v9fs_string_copy(&vs->fidp->path, &vs->path);
1550 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1551 v9fs_walk_post_oldfid_lstat(s, vs, err);
1555 v9fs_string_free(&vs->path);
1556 v9fs_walk_marshal(vs);
1559 v9fs_walk_complete(s, vs, err);
1562 static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
1564 int32_t fid, newfid;
1569 vs = qemu_malloc(sizeof(*vs));
1575 vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
1576 &newfid, &vs->nwnames);
1579 vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames);
1581 vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames);
1583 for (i = 0; i < vs->nwnames; i++) {
1584 vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
1589 vs->fidp = lookup_fid(s, fid);
1590 if (vs->fidp == NULL) {
1595 /* FIXME: is this really valid? */
1596 if (fid == newfid) {
1598 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
1599 v9fs_string_init(&vs->path);
1602 if (vs->name_idx < vs->nwnames) {
1603 v9fs_string_sprintf(&vs->path, "%s/%s",
1604 vs->fidp->path.data, vs->wnames[vs->name_idx].data);
1605 v9fs_string_copy(&vs->fidp->path, &vs->path);
1607 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1608 v9fs_walk_post_oldfid_lstat(s, vs, err);
1612 vs->newfidp = alloc_fid(s, newfid);
1613 if (vs->newfidp == NULL) {
1618 vs->newfidp->uid = vs->fidp->uid;
1619 v9fs_string_init(&vs->path);
1621 v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path);
1623 if (vs->name_idx < vs->nwnames) {
1624 v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
1625 vs->wnames[vs->name_idx].data);
1626 v9fs_string_copy(&vs->newfidp->path, &vs->path);
1628 err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
1629 v9fs_walk_post_newfid_lstat(s, vs, err);
1634 v9fs_walk_marshal(vs);
1637 v9fs_walk_complete(s, vs, err);
1640 static int32_t get_iounit(V9fsState *s, V9fsString *name)
1642 struct statfs stbuf;
1646 * iounit should be multiples of f_bsize (host filesystem block size
1647 * and as well as less than (client msize - P9_IOHDRSZ))
1649 if (!v9fs_do_statfs(s, name, &stbuf)) {
1650 iounit = stbuf.f_bsize;
1651 iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize;
1655 iounit = s->msize - P9_IOHDRSZ;
1660 static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err)
1662 if (vs->fidp->fs.dir == NULL) {
1666 vs->fidp->fid_type = P9_FID_DIR;
1667 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
1670 complete_pdu(s, vs->pdu, err);
1675 static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs)
1678 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
1680 complete_pdu(s, vs->pdu, err);
1684 static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err)
1686 if (vs->fidp->fs.fd == -1) {
1690 vs->fidp->fid_type = P9_FID_FILE;
1691 vs->iounit = get_iounit(s, &vs->fidp->path);
1692 v9fs_open_post_getiounit(s, vs);
1695 complete_pdu(s, vs->pdu, err);
1699 static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
1708 stat_to_qid(&vs->stbuf, &vs->qid);
1710 if (S_ISDIR(vs->stbuf.st_mode)) {
1711 vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path);
1712 v9fs_open_post_opendir(s, vs, err);
1714 if (s->proto_version == V9FS_PROTO_2000L) {
1716 flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
1717 /* Ignore direct disk access hint until the server supports it. */
1720 flags = omode_to_uflags(vs->mode);
1722 vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags);
1723 v9fs_open_post_open(s, vs, err);
1727 complete_pdu(s, vs->pdu, err);
1731 static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
1737 vs = qemu_malloc(sizeof(*vs));
1742 if (s->proto_version == V9FS_PROTO_2000L) {
1743 pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
1745 pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
1748 vs->fidp = lookup_fid(s, fid);
1749 if (vs->fidp == NULL) {
1754 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
1756 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
1758 v9fs_open_post_lstat(s, vs, err);
1761 complete_pdu(s, pdu, err);
1765 static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err)
1768 v9fs_string_copy(&vs->fidp->path, &vs->fullname);
1769 stat_to_qid(&vs->stbuf, &vs->qid);
1770 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
1774 vs->fidp->fid_type = P9_FID_NONE;
1776 if (vs->fidp->fs.fd > 0) {
1777 close(vs->fidp->fs.fd);
1781 complete_pdu(s, vs->pdu, err);
1782 v9fs_string_free(&vs->name);
1783 v9fs_string_free(&vs->fullname);
1787 static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs,
1794 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
1797 v9fs_post_lcreate(s, vs, err);
1800 static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs,
1803 if (vs->fidp->fs.fd == -1) {
1807 vs->fidp->fid_type = P9_FID_FILE;
1808 vs->iounit = get_iounit(s, &vs->fullname);
1809 v9fs_lcreate_post_get_iounit(s, vs, err);
1813 v9fs_post_lcreate(s, vs, err);
1816 static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu)
1818 int32_t dfid, flags, mode;
1820 V9fsLcreateState *vs;
1823 vs = qemu_malloc(sizeof(*vs));
1827 v9fs_string_init(&vs->fullname);
1829 pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
1832 vs->fidp = lookup_fid(s, dfid);
1833 if (vs->fidp == NULL) {
1838 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
1841 /* Ignore direct disk access hint until the server supports it. */
1844 vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
1846 v9fs_lcreate_post_do_open2(s, vs, err);
1850 complete_pdu(s, vs->pdu, err);
1851 v9fs_string_free(&vs->name);
1855 static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err)
1860 complete_pdu(s, pdu, err);
1863 static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu)
1871 pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
1872 fidp = lookup_fid(s, fid);
1875 v9fs_post_do_fsync(s, pdu, err);
1878 err = v9fs_do_fsync(s, fidp->fs.fd, datasync);
1879 v9fs_post_do_fsync(s, pdu, err);
1882 static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
1888 pdu_unmarshal(pdu, offset, "d", &fid);
1890 err = free_fid(s, fid);
1898 complete_pdu(s, pdu, err);
1901 static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t);
1903 static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1908 v9fs_stat_free(&vs->v9stat);
1909 v9fs_string_free(&vs->name);
1910 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
1911 vs->offset += vs->count;
1914 complete_pdu(s, vs->pdu, err);
1919 static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
1926 err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat);
1931 vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S",
1933 if ((vs->len != (vs->v9stat.size + 2)) ||
1934 ((vs->count + vs->len) > vs->max_count)) {
1935 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
1936 v9fs_read_post_seekdir(s, vs, err);
1939 vs->count += vs->len;
1940 v9fs_stat_free(&vs->v9stat);
1941 v9fs_string_free(&vs->name);
1942 vs->dir_pos = vs->dent->d_off;
1943 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
1944 v9fs_read_post_readdir(s, vs, err);
1947 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
1948 v9fs_read_post_seekdir(s, vs, err);
1953 static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1956 memset(&vs->v9stat, 0, sizeof(vs->v9stat));
1957 v9fs_string_init(&vs->name);
1958 v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
1960 err = v9fs_do_lstat(s, &vs->name, &vs->stbuf);
1961 v9fs_read_post_dir_lstat(s, vs, err);
1965 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
1966 vs->offset += vs->count;
1968 complete_pdu(s, vs->pdu, err);
1973 static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
1975 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
1976 v9fs_read_post_readdir(s, vs, err);
1980 static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
1983 vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
1984 v9fs_read_post_telldir(s, vs, err);
1988 static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err)
1991 /* IO error return the error */
1995 vs->total += vs->len;
1996 vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
1997 if (vs->total < vs->count && vs->len > 0) {
2000 print_sg(vs->sg, vs->cnt);
2002 vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
2007 } while (vs->len == -1 && errno == EINTR);
2008 if (vs->len == -1) {
2011 v9fs_read_post_preadv(s, vs, err);
2014 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
2015 vs->offset += vs->count;
2019 complete_pdu(s, vs->pdu, err);
2023 static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs)
2029 xattr_len = vs->fidp->fs.xattr.len;
2030 read_count = xattr_len - vs->off;
2031 if (read_count > vs->count) {
2032 read_count = vs->count;
2033 } else if (read_count < 0) {
2035 * read beyond XATTR value
2039 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
2040 vs->offset += pdu_pack(vs->pdu, vs->offset,
2041 ((char *)vs->fidp->fs.xattr.value) + vs->off,
2044 complete_pdu(s, vs->pdu, err);
2048 static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
2054 vs = qemu_malloc(sizeof(*vs));
2061 pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
2063 vs->fidp = lookup_fid(s, fid);
2064 if (vs->fidp == NULL) {
2069 if (vs->fidp->fid_type == P9_FID_DIR) {
2070 vs->max_count = vs->count;
2073 v9fs_do_rewinddir(s, vs->fidp->fs.dir);
2075 v9fs_read_post_rewinddir(s, vs, err);
2077 } else if (vs->fidp->fid_type == P9_FID_FILE) {
2079 pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
2080 vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
2081 if (vs->total <= vs->count) {
2082 vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
2088 v9fs_read_post_preadv(s, vs, err);
2091 } else if (vs->fidp->fid_type == P9_FID_XATTR) {
2092 v9fs_xattr_read(s, vs);
2098 complete_pdu(s, pdu, err);
2102 typedef struct V9fsReadDirState {
2106 off_t saved_dir_pos;
2107 struct dirent *dent;
2111 int64_t initial_offset;
2115 static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs)
2117 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
2118 vs->offset += vs->count;
2119 complete_pdu(s, vs->pdu, vs->offset);
2124 /* Size of each dirent on the wire: size of qid (13) + size of offset (8)
2125 * size of type (1) + size of name.size (2) + strlen(name.data)
2127 #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
2129 static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
2135 v9fs_string_init(&vs->name);
2136 v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
2138 if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
2139 /* Ran out of buffer. Set dir back to old position and return */
2140 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos);
2141 v9fs_readdir_post_seekdir(s, vs);
2145 /* Fill up just the path field of qid because the client uses
2146 * only that. To fill the entire qid structure we will have
2147 * to stat each dirent found, which is expensive
2149 size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path));
2150 memcpy(&vs->qid.path, &vs->dent->d_ino, size);
2151 /* Fill the other fields with dummy values */
2153 vs->qid.version = 0;
2155 len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs",
2156 &vs->qid, vs->dent->d_off,
2157 vs->dent->d_type, &vs->name);
2159 v9fs_string_free(&vs->name);
2160 vs->saved_dir_pos = vs->dent->d_off;
2161 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
2162 v9fs_readdir_post_readdir(s, vs);
2166 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
2167 vs->offset += vs->count;
2168 complete_pdu(s, vs->pdu, vs->offset);
2173 static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs)
2175 vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
2176 v9fs_readdir_post_readdir(s, vs);
2180 static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs)
2182 vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
2183 v9fs_readdir_post_telldir(s, vs);
2187 static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu)
2190 V9fsReadDirState *vs;
2194 vs = qemu_malloc(sizeof(*vs));
2199 pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
2202 vs->fidp = lookup_fid(s, fid);
2203 if (vs->fidp == NULL || !(vs->fidp->fs.dir)) {
2208 if (vs->initial_offset == 0) {
2209 v9fs_do_rewinddir(s, vs->fidp->fs.dir);
2211 v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset);
2214 v9fs_readdir_post_setdir(s, vs);
2218 complete_pdu(s, pdu, err);
2223 static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs,
2227 /* IO error return the error */
2231 vs->total += vs->len;
2232 vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
2233 if (vs->total < vs->count && vs->len > 0) {
2236 print_sg(vs->sg, vs->cnt);
2238 vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
2243 } while (vs->len == -1 && errno == EINTR);
2244 if (vs->len == -1) {
2247 v9fs_write_post_pwritev(s, vs, err);
2250 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
2253 complete_pdu(s, vs->pdu, err);
2257 static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs)
2264 xattr_len = vs->fidp->fs.xattr.len;
2265 write_count = xattr_len - vs->off;
2266 if (write_count > vs->count) {
2267 write_count = vs->count;
2268 } else if (write_count < 0) {
2270 * write beyond XATTR value len specified in
2276 vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
2278 vs->fidp->fs.xattr.copied_len += write_count;
2280 * Now copy the content from sg list
2282 for (i = 0; i < vs->cnt; i++) {
2283 if (write_count > vs->sg[i].iov_len) {
2284 to_copy = vs->sg[i].iov_len;
2286 to_copy = write_count;
2288 memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
2289 vs->sg[i].iov_base, to_copy);
2290 /* updating vs->off since we are not using below */
2292 write_count -= to_copy;
2295 complete_pdu(s, vs->pdu, err);
2299 static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
2305 vs = qemu_malloc(sizeof(*vs));
2313 pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
2316 vs->fidp = lookup_fid(s, fid);
2317 if (vs->fidp == NULL) {
2322 if (vs->fidp->fid_type == P9_FID_FILE) {
2323 if (vs->fidp->fs.fd == -1) {
2327 } else if (vs->fidp->fid_type == P9_FID_XATTR) {
2329 * setxattr operation
2331 v9fs_xattr_write(s, vs);
2337 vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
2338 if (vs->total <= vs->count) {
2339 vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off);
2344 v9fs_write_post_pwritev(s, vs, err);
2348 complete_pdu(s, vs->pdu, err);
2352 static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs)
2355 v9fs_string_copy(&vs->fidp->path, &vs->fullname);
2356 stat_to_qid(&vs->stbuf, &vs->qid);
2358 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
2361 complete_pdu(s, vs->pdu, err);
2362 v9fs_string_free(&vs->name);
2363 v9fs_string_free(&vs->extension);
2364 v9fs_string_free(&vs->fullname);
2368 static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err)
2371 vs->iounit = get_iounit(s, &vs->fidp->path);
2372 v9fs_create_post_getiounit(s, vs);
2376 complete_pdu(s, vs->pdu, err);
2377 v9fs_string_free(&vs->name);
2378 v9fs_string_free(&vs->extension);
2379 v9fs_string_free(&vs->fullname);
2383 static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
2388 v9fs_post_create(s, vs, err);
2391 static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
2394 if (!vs->fidp->fs.dir) {
2397 vs->fidp->fid_type = P9_FID_DIR;
2398 v9fs_post_create(s, vs, err);
2401 static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
2409 vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname);
2410 v9fs_create_post_opendir(s, vs, err);
2414 v9fs_post_create(s, vs, err);
2417 static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
2424 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2425 v9fs_create_post_dir_lstat(s, vs, err);
2429 v9fs_post_create(s, vs, err);
2432 static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
2435 vs->fidp->fid_type = P9_FID_NONE;
2436 close(vs->fidp->fs.fd);
2439 v9fs_post_create(s, vs, err);
2443 static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
2445 if (vs->fidp->fs.fd == -1) {
2449 vs->fidp->fid_type = P9_FID_FILE;
2450 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
2451 v9fs_create_post_fstat(s, vs, err);
2456 v9fs_post_create(s, vs, err);
2460 static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
2463 if (err == 0 || errno != ENOENT) {
2468 if (vs->perm & P9_STAT_MODE_DIR) {
2469 err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
2471 v9fs_create_post_mkdir(s, vs, err);
2472 } else if (vs->perm & P9_STAT_MODE_SYMLINK) {
2473 err = v9fs_do_symlink(s, vs->fidp, vs->extension.data,
2474 vs->fullname.data, -1);
2475 v9fs_create_post_perms(s, vs, err);
2476 } else if (vs->perm & P9_STAT_MODE_LINK) {
2477 int32_t nfid = atoi(vs->extension.data);
2478 V9fsFidState *nfidp = lookup_fid(s, nfid);
2479 if (nfidp == NULL) {
2481 v9fs_post_create(s, vs, err);
2483 err = v9fs_do_link(s, &nfidp->path, &vs->fullname);
2484 v9fs_create_post_perms(s, vs, err);
2485 } else if (vs->perm & P9_STAT_MODE_DEVICE) {
2487 uint32_t major, minor;
2490 if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major,
2493 v9fs_post_create(s, vs, err);
2505 v9fs_post_create(s, vs, err);
2508 nmode |= vs->perm & 0777;
2509 err = v9fs_do_mknod(s, vs->fullname.data, nmode,
2510 makedev(major, minor), vs->fidp->uid, -1);
2511 v9fs_create_post_perms(s, vs, err);
2512 } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
2513 err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
2514 0, vs->fidp->uid, -1);
2515 v9fs_post_create(s, vs, err);
2516 } else if (vs->perm & P9_STAT_MODE_SOCKET) {
2517 err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
2518 0, vs->fidp->uid, -1);
2519 v9fs_post_create(s, vs, err);
2521 vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
2522 -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
2524 v9fs_create_post_open2(s, vs, err);
2530 v9fs_post_create(s, vs, err);
2533 static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
2536 V9fsCreateState *vs;
2539 vs = qemu_malloc(sizeof(*vs));
2543 v9fs_string_init(&vs->fullname);
2545 pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
2546 &vs->perm, &vs->mode, &vs->extension);
2548 vs->fidp = lookup_fid(s, fid);
2549 if (vs->fidp == NULL) {
2554 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
2557 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2558 v9fs_create_post_lstat(s, vs, err);
2562 complete_pdu(s, vs->pdu, err);
2563 v9fs_string_free(&vs->name);
2564 v9fs_string_free(&vs->extension);
2568 static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err)
2571 stat_to_qid(&vs->stbuf, &vs->qid);
2572 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
2577 complete_pdu(s, vs->pdu, err);
2578 v9fs_string_free(&vs->name);
2579 v9fs_string_free(&vs->symname);
2580 v9fs_string_free(&vs->fullname);
2584 static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs,
2590 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
2592 v9fs_post_symlink(s, vs, err);
2595 static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu)
2598 V9fsSymlinkState *vs;
2602 vs = qemu_malloc(sizeof(*vs));
2606 v9fs_string_init(&vs->fullname);
2608 pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
2609 &vs->symname, &gid);
2611 vs->dfidp = lookup_fid(s, dfid);
2612 if (vs->dfidp == NULL) {
2617 v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
2619 err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data,
2620 vs->fullname.data, gid);
2621 v9fs_symlink_post_do_symlink(s, vs, err);
2625 complete_pdu(s, vs->pdu, err);
2626 v9fs_string_free(&vs->name);
2627 v9fs_string_free(&vs->symname);
2631 static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
2633 /* A nop call with no return */
2634 complete_pdu(s, pdu, 7);
2637 static void v9fs_link(V9fsState *s, V9fsPDU *pdu)
2639 int32_t dfid, oldfid;
2640 V9fsFidState *dfidp, *oldfidp;
2641 V9fsString name, fullname;
2645 v9fs_string_init(&fullname);
2647 pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
2649 dfidp = lookup_fid(s, dfid);
2650 if (dfidp == NULL) {
2655 oldfidp = lookup_fid(s, oldfid);
2656 if (oldfidp == NULL) {
2661 v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
2663 err = v9fs_do_link(s, &oldfidp->path, &fullname);
2667 v9fs_string_free(&fullname);
2670 v9fs_string_free(&name);
2671 complete_pdu(s, pdu, err);
2674 static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
2683 /* For TREMOVE we need to clunk the fid even on failed remove */
2684 free_fid(s, vs->fidp->fid);
2686 complete_pdu(s, vs->pdu, err);
2690 static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
2693 V9fsRemoveState *vs;
2696 vs = qemu_malloc(sizeof(*vs));
2700 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
2702 vs->fidp = lookup_fid(s, fid);
2703 if (vs->fidp == NULL) {
2708 err = v9fs_do_remove(s, &vs->fidp->path);
2709 v9fs_remove_post_remove(s, vs, err);
2713 complete_pdu(s, pdu, err);
2717 static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err)
2726 v9fs_stat_free(&vs->v9stat);
2727 complete_pdu(s, vs->pdu, err);
2731 static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err)
2736 if (vs->v9stat.length != -1) {
2737 if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) {
2741 v9fs_wstat_post_truncate(s, vs, err);
2745 v9fs_stat_free(&vs->v9stat);
2746 complete_pdu(s, vs->pdu, err);
2750 static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs)
2753 char *old_name, *new_name;
2756 if (vs->newdirfid != -1) {
2757 V9fsFidState *dirfidp;
2758 dirfidp = lookup_fid(s, vs->newdirfid);
2760 if (dirfidp == NULL) {
2765 BUG_ON(dirfidp->fid_type != P9_FID_NONE);
2767 new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
2769 strcpy(new_name, dirfidp->path.data);
2770 strcat(new_name, "/");
2771 strcat(new_name + dirfidp->path.size, vs->name.data);
2773 old_name = vs->fidp->path.data;
2774 end = strrchr(old_name, '/');
2780 new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
2782 strncat(new_name, old_name, end - old_name);
2783 strncat(new_name + (end - old_name), vs->name.data, vs->name.size);
2786 v9fs_string_free(&vs->name);
2787 vs->name.data = qemu_strdup(new_name);
2788 vs->name.size = strlen(new_name);
2790 if (strcmp(new_name, vs->fidp->path.data) != 0) {
2791 if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
2796 * Fixup fid's pointing to the old name to
2797 * start pointing to the new name
2799 for (fidp = s->fid_list; fidp; fidp = fidp->next) {
2800 if (vs->fidp == fidp) {
2802 * we replace name of this fid towards the end
2803 * so that our below strcmp will work
2807 if (!strncmp(vs->fidp->path.data, fidp->path.data,
2808 strlen(vs->fidp->path.data))) {
2809 /* replace the name */
2810 v9fs_fix_path(&fidp->path, &vs->name,
2811 strlen(vs->fidp->path.data));
2814 v9fs_string_copy(&vs->fidp->path, &vs->name);
2818 v9fs_string_free(&vs->name);
2822 static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err)
2824 complete_pdu(s, vs->pdu, err);
2828 static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err)
2834 if (vs->v9stat.name.size != 0) {
2835 V9fsRenameState *vr;
2837 vr = qemu_mallocz(sizeof(V9fsRenameState));
2840 vr->fidp = vs->fidp;
2841 vr->offset = vs->offset;
2842 vr->name.size = vs->v9stat.name.size;
2843 vr->name.data = qemu_strdup(vs->v9stat.name.data);
2845 err = v9fs_complete_rename(s, vr);
2848 v9fs_wstat_post_rename(s, vs, err);
2852 v9fs_stat_free(&vs->v9stat);
2853 complete_pdu(s, vs->pdu, err);
2857 static void v9fs_rename(V9fsState *s, V9fsPDU *pdu)
2860 V9fsRenameState *vs;
2863 vs = qemu_malloc(sizeof(*vs));
2867 pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
2869 vs->fidp = lookup_fid(s, fid);
2870 if (vs->fidp == NULL) {
2875 BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
2877 err = v9fs_complete_rename(s, vs);
2878 v9fs_rename_post_rename(s, vs, err);
2881 complete_pdu(s, vs->pdu, err);
2885 static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err)
2891 if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) {
2892 if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
2893 vs->v9stat.n_gid)) {
2897 v9fs_wstat_post_chown(s, vs, err);
2901 v9fs_stat_free(&vs->v9stat);
2902 complete_pdu(s, vs->pdu, err);
2906 static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err)
2912 if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) {
2913 struct timespec times[2];
2914 if (vs->v9stat.atime != -1) {
2915 times[0].tv_sec = vs->v9stat.atime;
2916 times[0].tv_nsec = 0;
2918 times[0].tv_nsec = UTIME_OMIT;
2920 if (vs->v9stat.mtime != -1) {
2921 times[1].tv_sec = vs->v9stat.mtime;
2922 times[1].tv_nsec = 0;
2924 times[1].tv_nsec = UTIME_OMIT;
2927 if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
2932 v9fs_wstat_post_utime(s, vs, err);
2936 v9fs_stat_free(&vs->v9stat);
2937 complete_pdu(s, vs->pdu, err);
2941 static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err)
2946 v9fs_stat_free(&vs->v9stat);
2947 complete_pdu(s, vs->pdu, err);
2951 static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err)
2960 v9_mode = stat_to_v9mode(&vs->stbuf);
2962 if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
2963 (v9_mode & P9_STAT_MODE_TYPE_BITS)) {
2964 /* Attempting to change the type */
2969 if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
2970 &vs->v9stat.extension))) {
2973 v9fs_wstat_post_chmod(s, vs, err);
2977 v9fs_stat_free(&vs->v9stat);
2978 complete_pdu(s, vs->pdu, err);
2982 static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
2988 vs = qemu_malloc(sizeof(*vs));
2992 pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
2994 vs->fidp = lookup_fid(s, fid);
2995 if (vs->fidp == NULL) {
3000 /* do we need to sync the file? */
3001 if (donttouch_stat(&vs->v9stat)) {
3002 err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
3003 v9fs_wstat_post_fsync(s, vs, err);
3007 if (vs->v9stat.mode != -1) {
3008 err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
3009 v9fs_wstat_post_lstat(s, vs, err);
3013 v9fs_wstat_post_chmod(s, vs, err);
3017 v9fs_stat_free(&vs->v9stat);
3018 complete_pdu(s, vs->pdu, err);
3022 static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err)
3024 int32_t bsize_factor;
3032 * compute bsize factor based on host file system block size
3035 bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize;
3036 if (!bsize_factor) {
3039 vs->v9statfs.f_type = vs->stbuf.f_type;
3040 vs->v9statfs.f_bsize = vs->stbuf.f_bsize;
3041 vs->v9statfs.f_bsize *= bsize_factor;
3043 * f_bsize is adjusted(multiplied) by bsize factor, so we need to
3044 * adjust(divide) the number of blocks, free blocks and available
3045 * blocks by bsize factor
3047 vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor;
3048 vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor;
3049 vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor;
3050 vs->v9statfs.f_files = vs->stbuf.f_files;
3051 vs->v9statfs.f_ffree = vs->stbuf.f_ffree;
3052 vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] |
3053 (unsigned long long)vs->stbuf.f_fsid.__val[1] << 32;
3054 vs->v9statfs.f_namelen = vs->stbuf.f_namelen;
3056 vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
3057 vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks,
3058 vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files,
3059 vs->v9statfs.f_ffree, vs->v9statfs.fsid_val,
3060 vs->v9statfs.f_namelen);
3063 complete_pdu(s, vs->pdu, vs->offset);
3067 static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu)
3069 V9fsStatfsState *vs;
3072 vs = qemu_malloc(sizeof(*vs));
3076 memset(&vs->v9statfs, 0, sizeof(vs->v9statfs));
3078 pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
3080 vs->fidp = lookup_fid(s, vs->fid);
3081 if (vs->fidp == NULL) {
3086 err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf);
3087 v9fs_statfs_post_statfs(s, vs, err);
3091 complete_pdu(s, vs->pdu, err);
3095 static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
3102 stat_to_qid(&vs->stbuf, &vs->qid);
3103 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
3106 complete_pdu(s, vs->pdu, err);
3107 v9fs_string_free(&vs->fullname);
3108 v9fs_string_free(&vs->name);
3112 static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err)
3119 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
3120 v9fs_mknod_post_lstat(s, vs, err);
3123 complete_pdu(s, vs->pdu, err);
3124 v9fs_string_free(&vs->fullname);
3125 v9fs_string_free(&vs->name);
3129 static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu)
3139 vs = qemu_malloc(sizeof(*vs));
3143 v9fs_string_init(&vs->fullname);
3144 pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
3145 &major, &minor, &gid);
3147 fidp = lookup_fid(s, fid);
3153 v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
3154 err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor),
3156 v9fs_mknod_post_mknod(s, vs, err);
3160 complete_pdu(s, vs->pdu, err);
3161 v9fs_string_free(&vs->fullname);
3162 v9fs_string_free(&vs->name);
3167 * Implement posix byte range locking code
3168 * Server side handling of locking code is very simple, because 9p server in
3169 * QEMU can handle only one client. And most of the lock handling
3170 * (like conflict, merging) etc is done by the VFS layer itself, so no need to
3171 * do any thing in * qemu 9p server side lock code path.
3172 * So when a TLOCK request comes, always return success
3175 static void v9fs_lock(V9fsState *s, V9fsPDU *pdu)
3177 int32_t fid, err = 0;
3180 vs = qemu_mallocz(sizeof(*vs));
3184 vs->flock = qemu_malloc(sizeof(*vs->flock));
3185 pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
3186 &vs->flock->flags, &vs->flock->start, &vs->flock->length,
3187 &vs->flock->proc_id, &vs->flock->client_id);
3189 vs->status = P9_LOCK_ERROR;
3191 /* We support only block flag now (that too ignored currently) */
3192 if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
3196 vs->fidp = lookup_fid(s, fid);
3197 if (vs->fidp == NULL) {
3202 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
3207 vs->status = P9_LOCK_SUCCESS;
3209 vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
3210 complete_pdu(s, vs->pdu, err);
3211 qemu_free(vs->flock);
3216 * When a TGETLOCK request comes, always return success because all lock
3217 * handling is done by client's VFS layer.
3220 static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu)
3222 int32_t fid, err = 0;
3223 V9fsGetlockState *vs;
3225 vs = qemu_mallocz(sizeof(*vs));
3229 vs->glock = qemu_malloc(sizeof(*vs->glock));
3230 pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
3231 &vs->glock->start, &vs->glock->length, &vs->glock->proc_id,
3232 &vs->glock->client_id);
3234 vs->fidp = lookup_fid(s, fid);
3235 if (vs->fidp == NULL) {
3240 err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
3245 vs->glock->type = F_UNLCK;
3246 vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
3247 vs->glock->start, vs->glock->length, vs->glock->proc_id,
3248 &vs->glock->client_id);
3250 complete_pdu(s, vs->pdu, err);
3251 qemu_free(vs->glock);
3255 static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
3262 stat_to_qid(&vs->stbuf, &vs->qid);
3263 vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
3266 complete_pdu(s, vs->pdu, err);
3267 v9fs_string_free(&vs->fullname);
3268 v9fs_string_free(&vs->name);
3272 static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err)
3279 err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
3280 v9fs_mkdir_post_lstat(s, vs, err);
3283 complete_pdu(s, vs->pdu, err);
3284 v9fs_string_free(&vs->fullname);
3285 v9fs_string_free(&vs->name);
3289 static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu)
3298 vs = qemu_malloc(sizeof(*vs));
3302 v9fs_string_init(&vs->fullname);
3303 pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
3306 fidp = lookup_fid(s, fid);
3312 v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
3313 err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid);
3314 v9fs_mkdir_post_mkdir(s, vs, err);
3318 complete_pdu(s, vs->pdu, err);
3319 v9fs_string_free(&vs->fullname);
3320 v9fs_string_free(&vs->name);
3324 static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err)
3329 free_fid(s, vs->xattr_fidp->fid);
3332 vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
3335 complete_pdu(s, vs->pdu, err);
3336 v9fs_string_free(&vs->name);
3341 static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err)
3345 free_fid(s, vs->xattr_fidp->fid);
3349 * Read the xattr value
3351 vs->xattr_fidp->fs.xattr.len = vs->size;
3352 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3353 vs->xattr_fidp->fs.xattr.copied_len = -1;
3355 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3356 err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
3357 &vs->name, vs->xattr_fidp->fs.xattr.value,
3358 vs->xattr_fidp->fs.xattr.len);
3360 v9fs_post_xattr_getvalue(s, vs, err);
3363 complete_pdu(s, vs->pdu, err);
3364 v9fs_string_free(&vs->name);
3368 static void v9fs_post_lxattr_getvalue(V9fsState *s,
3369 V9fsXattrState *vs, int err)
3373 free_fid(s, vs->xattr_fidp->fid);
3376 vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
3379 complete_pdu(s, vs->pdu, err);
3380 v9fs_string_free(&vs->name);
3385 static void v9fs_post_lxattr_check(V9fsState *s,
3386 V9fsXattrState *vs, ssize_t err)
3390 free_fid(s, vs->xattr_fidp->fid);
3394 * Read the xattr value
3396 vs->xattr_fidp->fs.xattr.len = vs->size;
3397 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3398 vs->xattr_fidp->fs.xattr.copied_len = -1;
3400 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3401 err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
3402 vs->xattr_fidp->fs.xattr.value,
3403 vs->xattr_fidp->fs.xattr.len);
3405 v9fs_post_lxattr_getvalue(s, vs, err);
3408 complete_pdu(s, vs->pdu, err);
3409 v9fs_string_free(&vs->name);
3413 static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu)
3417 int32_t fid, newfid;
3419 vs = qemu_malloc(sizeof(*vs));
3423 pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
3424 vs->file_fidp = lookup_fid(s, fid);
3425 if (vs->file_fidp == NULL) {
3430 vs->xattr_fidp = alloc_fid(s, newfid);
3431 if (vs->xattr_fidp == NULL) {
3436 v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path);
3437 if (vs->name.data[0] == 0) {
3439 * listxattr request. Get the size first
3441 vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
3446 v9fs_post_lxattr_check(s, vs, err);
3450 * specific xattr fid. We check for xattr
3451 * presence also collect the xattr size
3453 vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
3454 &vs->name, NULL, 0);
3458 v9fs_post_xattr_check(s, vs, err);
3462 complete_pdu(s, vs->pdu, err);
3463 v9fs_string_free(&vs->name);
3467 static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu)
3474 vs = qemu_malloc(sizeof(*vs));
3478 pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
3479 &fid, &vs->name, &vs->size, &flags);
3481 vs->file_fidp = lookup_fid(s, fid);
3482 if (vs->file_fidp == NULL) {
3487 /* Make the file fid point to xattr */
3488 vs->xattr_fidp = vs->file_fidp;
3489 vs->xattr_fidp->fid_type = P9_FID_XATTR;
3490 vs->xattr_fidp->fs.xattr.copied_len = 0;
3491 vs->xattr_fidp->fs.xattr.len = vs->size;
3492 vs->xattr_fidp->fs.xattr.flags = flags;
3493 v9fs_string_init(&vs->xattr_fidp->fs.xattr.name);
3494 v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name);
3496 vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
3498 vs->xattr_fidp->fs.xattr.value = NULL;
3501 complete_pdu(s, vs->pdu, err);
3502 v9fs_string_free(&vs->name);
3506 static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs,
3513 vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
3516 complete_pdu(s, vs->pdu, err);
3517 v9fs_string_free(&vs->target);
3521 static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu)
3524 V9fsReadLinkState *vs;
3528 vs = qemu_malloc(sizeof(*vs));
3532 pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
3534 fidp = lookup_fid(s, fid);
3540 v9fs_string_init(&vs->target);
3541 err = v9fs_do_readlink(s, &fidp->path, &vs->target);
3542 v9fs_readlink_post_readlink(s, vs, err);
3545 complete_pdu(s, vs->pdu, err);
3549 typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
3551 static pdu_handler_t *pdu_handlers[] = {
3552 [P9_TREADDIR] = v9fs_readdir,
3553 [P9_TSTATFS] = v9fs_statfs,
3554 [P9_TGETATTR] = v9fs_getattr,
3555 [P9_TSETATTR] = v9fs_setattr,
3556 [P9_TXATTRWALK] = v9fs_xattrwalk,
3557 [P9_TXATTRCREATE] = v9fs_xattrcreate,
3558 [P9_TMKNOD] = v9fs_mknod,
3559 [P9_TRENAME] = v9fs_rename,
3560 [P9_TLOCK] = v9fs_lock,
3561 [P9_TGETLOCK] = v9fs_getlock,
3562 [P9_TREADLINK] = v9fs_readlink,
3563 [P9_TMKDIR] = v9fs_mkdir,
3564 [P9_TVERSION] = v9fs_version,
3565 [P9_TLOPEN] = v9fs_open,
3566 [P9_TATTACH] = v9fs_attach,
3567 [P9_TSTAT] = v9fs_stat,
3568 [P9_TWALK] = v9fs_walk,
3569 [P9_TCLUNK] = v9fs_clunk,
3570 [P9_TFSYNC] = v9fs_fsync,
3571 [P9_TOPEN] = v9fs_open,
3572 [P9_TREAD] = v9fs_read,
3574 [P9_TAUTH] = v9fs_auth,
3576 [P9_TFLUSH] = v9fs_flush,
3577 [P9_TLINK] = v9fs_link,
3578 [P9_TSYMLINK] = v9fs_symlink,
3579 [P9_TCREATE] = v9fs_create,
3580 [P9_TLCREATE] = v9fs_lcreate,
3581 [P9_TWRITE] = v9fs_write,
3582 [P9_TWSTAT] = v9fs_wstat,
3583 [P9_TREMOVE] = v9fs_remove,
3586 static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
3588 pdu_handler_t *handler;
3594 BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers));
3596 handler = pdu_handlers[pdu->id];
3597 BUG_ON(handler == NULL);
3602 static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
3604 V9fsState *s = (V9fsState *)vdev;
3608 while ((pdu = alloc_pdu(s)) &&
3609 (len = virtqueue_pop(vq, &pdu->elem)) != 0) {
3612 BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
3613 BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
3615 ptr = pdu->elem.out_sg[0].iov_base;
3617 memcpy(&pdu->size, ptr, 4);
3619 memcpy(&pdu->tag, ptr + 5, 2);
3627 static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
3629 features |= 1 << VIRTIO_9P_MOUNT_TAG;
3633 static V9fsState *to_virtio_9p(VirtIODevice *vdev)
3635 return (V9fsState *)vdev;
3638 static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
3640 struct virtio_9p_config *cfg;
3641 V9fsState *s = to_virtio_9p(vdev);
3643 cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
3645 stw_raw(&cfg->tag_len, s->tag_len);
3646 memcpy(cfg->tag, s->tag, s->tag_len);
3647 memcpy(config, cfg, s->config_size);
3651 VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
3659 s = (V9fsState *)virtio_common_init("virtio-9p",
3661 sizeof(struct virtio_9p_config)+
3665 /* initialize pdu allocator */
3666 QLIST_INIT(&s->free_list);
3667 for (i = 0; i < (MAX_REQ - 1); i++) {
3668 QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
3671 s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
3673 fse = get_fsdev_fsentry(conf->fsdev_id);
3676 /* We don't have a fsdev identified by fsdev_id */
3677 fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
3678 "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
3682 if (!fse->path || !conf->tag) {
3683 /* we haven't specified a mount_tag or the path */
3684 fprintf(stderr, "fsdev with id %s needs path "
3685 "and Virtio-9p device needs mount_tag arguments\n",
3690 if (!strcmp(fse->security_model, "passthrough")) {
3691 /* Files on the Fileserver set to client user credentials */
3692 s->ctx.fs_sm = SM_PASSTHROUGH;
3693 s->ctx.xops = passthrough_xattr_ops;
3694 } else if (!strcmp(fse->security_model, "mapped")) {
3695 /* Files on the fileserver are set to QEMU credentials.
3696 * Client user credentials are saved in extended attributes.
3698 s->ctx.fs_sm = SM_MAPPED;
3699 s->ctx.xops = mapped_xattr_ops;
3700 } else if (!strcmp(fse->security_model, "none")) {
3702 * Files on the fileserver are set to QEMU credentials.
3704 s->ctx.fs_sm = SM_NONE;
3705 s->ctx.xops = none_xattr_ops;
3707 fprintf(stderr, "Default to security_model=none. You may want"
3708 " enable advanced security model using "
3709 "security option:\n\t security_model=passthrough \n\t "
3710 "security_model=mapped\n");
3711 s->ctx.fs_sm = SM_NONE;
3712 s->ctx.xops = none_xattr_ops;
3715 if (lstat(fse->path, &stat)) {
3716 fprintf(stderr, "share path %s does not exist\n", fse->path);
3718 } else if (!S_ISDIR(stat.st_mode)) {
3719 fprintf(stderr, "share path %s is not a directory \n", fse->path);
3723 s->ctx.fs_root = qemu_strdup(fse->path);
3724 len = strlen(conf->tag);
3725 if (len > MAX_TAG_LEN) {
3728 /* s->tag is non-NULL terminated string */
3729 s->tag = qemu_malloc(len);
3730 memcpy(s->tag, conf->tag, len);
3735 s->vdev.get_features = virtio_9p_get_features;
3736 s->config_size = sizeof(struct virtio_9p_config) +
3738 s->vdev.get_config = virtio_9p_get_config;