160ce86c7SWei Liu /* 260ce86c7SWei Liu * Virtio 9p backend 360ce86c7SWei Liu * 460ce86c7SWei Liu * Copyright IBM, Corp. 2010 560ce86c7SWei Liu * 660ce86c7SWei Liu * Authors: 760ce86c7SWei Liu * Anthony Liguori <aliguori@us.ibm.com> 860ce86c7SWei Liu * 960ce86c7SWei Liu * This work is licensed under the terms of the GNU GPL, version 2. See 1060ce86c7SWei Liu * the COPYING file in the top-level directory. 1160ce86c7SWei Liu * 1260ce86c7SWei Liu */ 1360ce86c7SWei Liu 14fbc04127SPeter Maydell #include "qemu/osdep.h" 1560ce86c7SWei Liu #include "hw/virtio/virtio.h" 1660ce86c7SWei Liu #include "hw/i386/pc.h" 17*da34e65cSMarkus Armbruster #include "qapi/error.h" 1860ce86c7SWei Liu #include "qemu/error-report.h" 1960ce86c7SWei Liu #include "qemu/iov.h" 2060ce86c7SWei Liu #include "qemu/sockets.h" 2160ce86c7SWei Liu #include "virtio-9p.h" 2260ce86c7SWei Liu #include "fsdev/qemu-fsdev.h" 2360ce86c7SWei Liu #include "9p-xattr.h" 2460ce86c7SWei Liu #include "coth.h" 2560ce86c7SWei Liu #include "trace.h" 2660ce86c7SWei Liu #include "migration/migration.h" 2760ce86c7SWei Liu 2860ce86c7SWei Liu int open_fd_hw; 2960ce86c7SWei Liu int total_open_fd; 3060ce86c7SWei Liu static int open_fd_rc; 3160ce86c7SWei Liu 3260ce86c7SWei Liu enum { 3360ce86c7SWei Liu Oread = 0x00, 3460ce86c7SWei Liu Owrite = 0x01, 3560ce86c7SWei Liu Ordwr = 0x02, 3660ce86c7SWei Liu Oexec = 0x03, 3760ce86c7SWei Liu Oexcl = 0x04, 3860ce86c7SWei Liu Otrunc = 0x10, 3960ce86c7SWei Liu Orexec = 0x20, 4060ce86c7SWei Liu Orclose = 0x40, 4160ce86c7SWei Liu Oappend = 0x80, 4260ce86c7SWei Liu }; 4360ce86c7SWei Liu 4460ce86c7SWei Liu ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 4560ce86c7SWei Liu { 4660ce86c7SWei Liu ssize_t ret; 4760ce86c7SWei Liu va_list ap; 4860ce86c7SWei Liu 4960ce86c7SWei Liu va_start(ap, fmt); 5060ce86c7SWei Liu ret = virtio_pdu_vmarshal(pdu, offset, fmt, ap); 5160ce86c7SWei Liu va_end(ap); 5260ce86c7SWei Liu 5360ce86c7SWei Liu return ret; 5460ce86c7SWei Liu } 5560ce86c7SWei Liu 5660ce86c7SWei Liu ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 5760ce86c7SWei Liu { 5860ce86c7SWei Liu ssize_t ret; 5960ce86c7SWei Liu va_list ap; 6060ce86c7SWei Liu 6160ce86c7SWei Liu va_start(ap, fmt); 6260ce86c7SWei Liu ret = virtio_pdu_vunmarshal(pdu, offset, fmt, ap); 6360ce86c7SWei Liu va_end(ap); 6460ce86c7SWei Liu 6560ce86c7SWei Liu return ret; 6660ce86c7SWei Liu } 6760ce86c7SWei Liu 6860ce86c7SWei Liu static void pdu_push_and_notify(V9fsPDU *pdu) 6960ce86c7SWei Liu { 7060ce86c7SWei Liu virtio_9p_push_and_notify(pdu); 7160ce86c7SWei Liu } 7260ce86c7SWei Liu 7360ce86c7SWei Liu static int omode_to_uflags(int8_t mode) 7460ce86c7SWei Liu { 7560ce86c7SWei Liu int ret = 0; 7660ce86c7SWei Liu 7760ce86c7SWei Liu switch (mode & 3) { 7860ce86c7SWei Liu case Oread: 7960ce86c7SWei Liu ret = O_RDONLY; 8060ce86c7SWei Liu break; 8160ce86c7SWei Liu case Ordwr: 8260ce86c7SWei Liu ret = O_RDWR; 8360ce86c7SWei Liu break; 8460ce86c7SWei Liu case Owrite: 8560ce86c7SWei Liu ret = O_WRONLY; 8660ce86c7SWei Liu break; 8760ce86c7SWei Liu case Oexec: 8860ce86c7SWei Liu ret = O_RDONLY; 8960ce86c7SWei Liu break; 9060ce86c7SWei Liu } 9160ce86c7SWei Liu 9260ce86c7SWei Liu if (mode & Otrunc) { 9360ce86c7SWei Liu ret |= O_TRUNC; 9460ce86c7SWei Liu } 9560ce86c7SWei Liu 9660ce86c7SWei Liu if (mode & Oappend) { 9760ce86c7SWei Liu ret |= O_APPEND; 9860ce86c7SWei Liu } 9960ce86c7SWei Liu 10060ce86c7SWei Liu if (mode & Oexcl) { 10160ce86c7SWei Liu ret |= O_EXCL; 10260ce86c7SWei Liu } 10360ce86c7SWei Liu 10460ce86c7SWei Liu return ret; 10560ce86c7SWei Liu } 10660ce86c7SWei Liu 10760ce86c7SWei Liu struct dotl_openflag_map { 10860ce86c7SWei Liu int dotl_flag; 10960ce86c7SWei Liu int open_flag; 11060ce86c7SWei Liu }; 11160ce86c7SWei Liu 11260ce86c7SWei Liu static int dotl_to_open_flags(int flags) 11360ce86c7SWei Liu { 11460ce86c7SWei Liu int i; 11560ce86c7SWei Liu /* 11660ce86c7SWei Liu * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY 11760ce86c7SWei Liu * and P9_DOTL_NOACCESS 11860ce86c7SWei Liu */ 11960ce86c7SWei Liu int oflags = flags & O_ACCMODE; 12060ce86c7SWei Liu 12160ce86c7SWei Liu struct dotl_openflag_map dotl_oflag_map[] = { 12260ce86c7SWei Liu { P9_DOTL_CREATE, O_CREAT }, 12360ce86c7SWei Liu { P9_DOTL_EXCL, O_EXCL }, 12460ce86c7SWei Liu { P9_DOTL_NOCTTY , O_NOCTTY }, 12560ce86c7SWei Liu { P9_DOTL_TRUNC, O_TRUNC }, 12660ce86c7SWei Liu { P9_DOTL_APPEND, O_APPEND }, 12760ce86c7SWei Liu { P9_DOTL_NONBLOCK, O_NONBLOCK } , 12860ce86c7SWei Liu { P9_DOTL_DSYNC, O_DSYNC }, 12960ce86c7SWei Liu { P9_DOTL_FASYNC, FASYNC }, 13060ce86c7SWei Liu { P9_DOTL_DIRECT, O_DIRECT }, 13160ce86c7SWei Liu { P9_DOTL_LARGEFILE, O_LARGEFILE }, 13260ce86c7SWei Liu { P9_DOTL_DIRECTORY, O_DIRECTORY }, 13360ce86c7SWei Liu { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, 13460ce86c7SWei Liu { P9_DOTL_NOATIME, O_NOATIME }, 13560ce86c7SWei Liu { P9_DOTL_SYNC, O_SYNC }, 13660ce86c7SWei Liu }; 13760ce86c7SWei Liu 13860ce86c7SWei Liu for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { 13960ce86c7SWei Liu if (flags & dotl_oflag_map[i].dotl_flag) { 14060ce86c7SWei Liu oflags |= dotl_oflag_map[i].open_flag; 14160ce86c7SWei Liu } 14260ce86c7SWei Liu } 14360ce86c7SWei Liu 14460ce86c7SWei Liu return oflags; 14560ce86c7SWei Liu } 14660ce86c7SWei Liu 14760ce86c7SWei Liu void cred_init(FsCred *credp) 14860ce86c7SWei Liu { 14960ce86c7SWei Liu credp->fc_uid = -1; 15060ce86c7SWei Liu credp->fc_gid = -1; 15160ce86c7SWei Liu credp->fc_mode = -1; 15260ce86c7SWei Liu credp->fc_rdev = -1; 15360ce86c7SWei Liu } 15460ce86c7SWei Liu 15560ce86c7SWei Liu static int get_dotl_openflags(V9fsState *s, int oflags) 15660ce86c7SWei Liu { 15760ce86c7SWei Liu int flags; 15860ce86c7SWei Liu /* 15960ce86c7SWei Liu * Filter the client open flags 16060ce86c7SWei Liu */ 16160ce86c7SWei Liu flags = dotl_to_open_flags(oflags); 16260ce86c7SWei Liu flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); 16360ce86c7SWei Liu /* 16460ce86c7SWei Liu * Ignore direct disk access hint until the server supports it. 16560ce86c7SWei Liu */ 16660ce86c7SWei Liu flags &= ~O_DIRECT; 16760ce86c7SWei Liu return flags; 16860ce86c7SWei Liu } 16960ce86c7SWei Liu 17060ce86c7SWei Liu void v9fs_path_init(V9fsPath *path) 17160ce86c7SWei Liu { 17260ce86c7SWei Liu path->data = NULL; 17360ce86c7SWei Liu path->size = 0; 17460ce86c7SWei Liu } 17560ce86c7SWei Liu 17660ce86c7SWei Liu void v9fs_path_free(V9fsPath *path) 17760ce86c7SWei Liu { 17860ce86c7SWei Liu g_free(path->data); 17960ce86c7SWei Liu path->data = NULL; 18060ce86c7SWei Liu path->size = 0; 18160ce86c7SWei Liu } 18260ce86c7SWei Liu 18360ce86c7SWei Liu void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs) 18460ce86c7SWei Liu { 18560ce86c7SWei Liu v9fs_path_free(lhs); 18660ce86c7SWei Liu lhs->data = g_malloc(rhs->size); 18760ce86c7SWei Liu memcpy(lhs->data, rhs->data, rhs->size); 18860ce86c7SWei Liu lhs->size = rhs->size; 18960ce86c7SWei Liu } 19060ce86c7SWei Liu 19160ce86c7SWei Liu int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 19260ce86c7SWei Liu const char *name, V9fsPath *path) 19360ce86c7SWei Liu { 19460ce86c7SWei Liu int err; 19560ce86c7SWei Liu err = s->ops->name_to_path(&s->ctx, dirpath, name, path); 19660ce86c7SWei Liu if (err < 0) { 19760ce86c7SWei Liu err = -errno; 19860ce86c7SWei Liu } 19960ce86c7SWei Liu return err; 20060ce86c7SWei Liu } 20160ce86c7SWei Liu 20260ce86c7SWei Liu /* 20360ce86c7SWei Liu * Return TRUE if s1 is an ancestor of s2. 20460ce86c7SWei Liu * 20560ce86c7SWei Liu * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". 20660ce86c7SWei Liu * As a special case, We treat s1 as ancestor of s2 if they are same! 20760ce86c7SWei Liu */ 20860ce86c7SWei Liu static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) 20960ce86c7SWei Liu { 21060ce86c7SWei Liu if (!strncmp(s1->data, s2->data, s1->size - 1)) { 21160ce86c7SWei Liu if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { 21260ce86c7SWei Liu return 1; 21360ce86c7SWei Liu } 21460ce86c7SWei Liu } 21560ce86c7SWei Liu return 0; 21660ce86c7SWei Liu } 21760ce86c7SWei Liu 21860ce86c7SWei Liu static size_t v9fs_string_size(V9fsString *str) 21960ce86c7SWei Liu { 22060ce86c7SWei Liu return str->size; 22160ce86c7SWei Liu } 22260ce86c7SWei Liu 22360ce86c7SWei Liu /* 22460ce86c7SWei Liu * returns 0 if fid got re-opened, 1 if not, < 0 on error */ 22560ce86c7SWei Liu static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) 22660ce86c7SWei Liu { 22760ce86c7SWei Liu int err = 1; 22860ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 22960ce86c7SWei Liu if (f->fs.fd == -1) { 23060ce86c7SWei Liu do { 23160ce86c7SWei Liu err = v9fs_co_open(pdu, f, f->open_flags); 23260ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 23360ce86c7SWei Liu } 23460ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 23560ce86c7SWei Liu if (f->fs.dir == NULL) { 23660ce86c7SWei Liu do { 23760ce86c7SWei Liu err = v9fs_co_opendir(pdu, f); 23860ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 23960ce86c7SWei Liu } 24060ce86c7SWei Liu } 24160ce86c7SWei Liu return err; 24260ce86c7SWei Liu } 24360ce86c7SWei Liu 24460ce86c7SWei Liu static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid) 24560ce86c7SWei Liu { 24660ce86c7SWei Liu int err; 24760ce86c7SWei Liu V9fsFidState *f; 24860ce86c7SWei Liu V9fsState *s = pdu->s; 24960ce86c7SWei Liu 25060ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 25160ce86c7SWei Liu BUG_ON(f->clunked); 25260ce86c7SWei Liu if (f->fid == fid) { 25360ce86c7SWei Liu /* 25460ce86c7SWei Liu * Update the fid ref upfront so that 25560ce86c7SWei Liu * we don't get reclaimed when we yield 25660ce86c7SWei Liu * in open later. 25760ce86c7SWei Liu */ 25860ce86c7SWei Liu f->ref++; 25960ce86c7SWei Liu /* 26060ce86c7SWei Liu * check whether we need to reopen the 26160ce86c7SWei Liu * file. We might have closed the fd 26260ce86c7SWei Liu * while trying to free up some file 26360ce86c7SWei Liu * descriptors. 26460ce86c7SWei Liu */ 26560ce86c7SWei Liu err = v9fs_reopen_fid(pdu, f); 26660ce86c7SWei Liu if (err < 0) { 26760ce86c7SWei Liu f->ref--; 26860ce86c7SWei Liu return NULL; 26960ce86c7SWei Liu } 27060ce86c7SWei Liu /* 27160ce86c7SWei Liu * Mark the fid as referenced so that the LRU 27260ce86c7SWei Liu * reclaim won't close the file descriptor 27360ce86c7SWei Liu */ 27460ce86c7SWei Liu f->flags |= FID_REFERENCED; 27560ce86c7SWei Liu return f; 27660ce86c7SWei Liu } 27760ce86c7SWei Liu } 27860ce86c7SWei Liu return NULL; 27960ce86c7SWei Liu } 28060ce86c7SWei Liu 28160ce86c7SWei Liu static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) 28260ce86c7SWei Liu { 28360ce86c7SWei Liu V9fsFidState *f; 28460ce86c7SWei Liu 28560ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 28660ce86c7SWei Liu /* If fid is already there return NULL */ 28760ce86c7SWei Liu BUG_ON(f->clunked); 28860ce86c7SWei Liu if (f->fid == fid) { 28960ce86c7SWei Liu return NULL; 29060ce86c7SWei Liu } 29160ce86c7SWei Liu } 29260ce86c7SWei Liu f = g_malloc0(sizeof(V9fsFidState)); 29360ce86c7SWei Liu f->fid = fid; 29460ce86c7SWei Liu f->fid_type = P9_FID_NONE; 29560ce86c7SWei Liu f->ref = 1; 29660ce86c7SWei Liu /* 29760ce86c7SWei Liu * Mark the fid as referenced so that the LRU 29860ce86c7SWei Liu * reclaim won't close the file descriptor 29960ce86c7SWei Liu */ 30060ce86c7SWei Liu f->flags |= FID_REFERENCED; 30160ce86c7SWei Liu f->next = s->fid_list; 30260ce86c7SWei Liu s->fid_list = f; 30360ce86c7SWei Liu 30460ce86c7SWei Liu return f; 30560ce86c7SWei Liu } 30660ce86c7SWei Liu 30760ce86c7SWei Liu static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) 30860ce86c7SWei Liu { 30960ce86c7SWei Liu int retval = 0; 31060ce86c7SWei Liu 31160ce86c7SWei Liu if (fidp->fs.xattr.copied_len == -1) { 31260ce86c7SWei Liu /* getxattr/listxattr fid */ 31360ce86c7SWei Liu goto free_value; 31460ce86c7SWei Liu } 31560ce86c7SWei Liu /* 31660ce86c7SWei Liu * if this is fid for setxattr. clunk should 31760ce86c7SWei Liu * result in setxattr localcall 31860ce86c7SWei Liu */ 31960ce86c7SWei Liu if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { 32060ce86c7SWei Liu /* clunk after partial write */ 32160ce86c7SWei Liu retval = -EINVAL; 32260ce86c7SWei Liu goto free_out; 32360ce86c7SWei Liu } 32460ce86c7SWei Liu if (fidp->fs.xattr.len) { 32560ce86c7SWei Liu retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, 32660ce86c7SWei Liu fidp->fs.xattr.value, 32760ce86c7SWei Liu fidp->fs.xattr.len, 32860ce86c7SWei Liu fidp->fs.xattr.flags); 32960ce86c7SWei Liu } else { 33060ce86c7SWei Liu retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); 33160ce86c7SWei Liu } 33260ce86c7SWei Liu free_out: 33360ce86c7SWei Liu v9fs_string_free(&fidp->fs.xattr.name); 33460ce86c7SWei Liu free_value: 33560ce86c7SWei Liu g_free(fidp->fs.xattr.value); 33660ce86c7SWei Liu return retval; 33760ce86c7SWei Liu } 33860ce86c7SWei Liu 33960ce86c7SWei Liu static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp) 34060ce86c7SWei Liu { 34160ce86c7SWei Liu int retval = 0; 34260ce86c7SWei Liu 34360ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 34460ce86c7SWei Liu /* If we reclaimed the fd no need to close */ 34560ce86c7SWei Liu if (fidp->fs.fd != -1) { 34660ce86c7SWei Liu retval = v9fs_co_close(pdu, &fidp->fs); 34760ce86c7SWei Liu } 34860ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_DIR) { 34960ce86c7SWei Liu if (fidp->fs.dir != NULL) { 35060ce86c7SWei Liu retval = v9fs_co_closedir(pdu, &fidp->fs); 35160ce86c7SWei Liu } 35260ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 35360ce86c7SWei Liu retval = v9fs_xattr_fid_clunk(pdu, fidp); 35460ce86c7SWei Liu } 35560ce86c7SWei Liu v9fs_path_free(&fidp->path); 35660ce86c7SWei Liu g_free(fidp); 35760ce86c7SWei Liu return retval; 35860ce86c7SWei Liu } 35960ce86c7SWei Liu 36060ce86c7SWei Liu static int put_fid(V9fsPDU *pdu, V9fsFidState *fidp) 36160ce86c7SWei Liu { 36260ce86c7SWei Liu BUG_ON(!fidp->ref); 36360ce86c7SWei Liu fidp->ref--; 36460ce86c7SWei Liu /* 36560ce86c7SWei Liu * Don't free the fid if it is in reclaim list 36660ce86c7SWei Liu */ 36760ce86c7SWei Liu if (!fidp->ref && fidp->clunked) { 36860ce86c7SWei Liu if (fidp->fid == pdu->s->root_fid) { 36960ce86c7SWei Liu /* 37060ce86c7SWei Liu * if the clunked fid is root fid then we 37160ce86c7SWei Liu * have unmounted the fs on the client side. 37260ce86c7SWei Liu * delete the migration blocker. Ideally, this 37360ce86c7SWei Liu * should be hooked to transport close notification 37460ce86c7SWei Liu */ 37560ce86c7SWei Liu if (pdu->s->migration_blocker) { 37660ce86c7SWei Liu migrate_del_blocker(pdu->s->migration_blocker); 37760ce86c7SWei Liu error_free(pdu->s->migration_blocker); 37860ce86c7SWei Liu pdu->s->migration_blocker = NULL; 37960ce86c7SWei Liu } 38060ce86c7SWei Liu } 38160ce86c7SWei Liu return free_fid(pdu, fidp); 38260ce86c7SWei Liu } 38360ce86c7SWei Liu return 0; 38460ce86c7SWei Liu } 38560ce86c7SWei Liu 38660ce86c7SWei Liu static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) 38760ce86c7SWei Liu { 38860ce86c7SWei Liu V9fsFidState **fidpp, *fidp; 38960ce86c7SWei Liu 39060ce86c7SWei Liu for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { 39160ce86c7SWei Liu if ((*fidpp)->fid == fid) { 39260ce86c7SWei Liu break; 39360ce86c7SWei Liu } 39460ce86c7SWei Liu } 39560ce86c7SWei Liu if (*fidpp == NULL) { 39660ce86c7SWei Liu return NULL; 39760ce86c7SWei Liu } 39860ce86c7SWei Liu fidp = *fidpp; 39960ce86c7SWei Liu *fidpp = fidp->next; 40060ce86c7SWei Liu fidp->clunked = 1; 40160ce86c7SWei Liu return fidp; 40260ce86c7SWei Liu } 40360ce86c7SWei Liu 40460ce86c7SWei Liu void v9fs_reclaim_fd(V9fsPDU *pdu) 40560ce86c7SWei Liu { 40660ce86c7SWei Liu int reclaim_count = 0; 40760ce86c7SWei Liu V9fsState *s = pdu->s; 40860ce86c7SWei Liu V9fsFidState *f, *reclaim_list = NULL; 40960ce86c7SWei Liu 41060ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 41160ce86c7SWei Liu /* 41260ce86c7SWei Liu * Unlink fids cannot be reclaimed. Check 41360ce86c7SWei Liu * for them and skip them. Also skip fids 41460ce86c7SWei Liu * currently being operated on. 41560ce86c7SWei Liu */ 41660ce86c7SWei Liu if (f->ref || f->flags & FID_NON_RECLAIMABLE) { 41760ce86c7SWei Liu continue; 41860ce86c7SWei Liu } 41960ce86c7SWei Liu /* 42060ce86c7SWei Liu * if it is a recently referenced fid 42160ce86c7SWei Liu * we leave the fid untouched and clear the 42260ce86c7SWei Liu * reference bit. We come back to it later 42360ce86c7SWei Liu * in the next iteration. (a simple LRU without 42460ce86c7SWei Liu * moving list elements around) 42560ce86c7SWei Liu */ 42660ce86c7SWei Liu if (f->flags & FID_REFERENCED) { 42760ce86c7SWei Liu f->flags &= ~FID_REFERENCED; 42860ce86c7SWei Liu continue; 42960ce86c7SWei Liu } 43060ce86c7SWei Liu /* 43160ce86c7SWei Liu * Add fids to reclaim list. 43260ce86c7SWei Liu */ 43360ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 43460ce86c7SWei Liu if (f->fs.fd != -1) { 43560ce86c7SWei Liu /* 43660ce86c7SWei Liu * Up the reference count so that 43760ce86c7SWei Liu * a clunk request won't free this fid 43860ce86c7SWei Liu */ 43960ce86c7SWei Liu f->ref++; 44060ce86c7SWei Liu f->rclm_lst = reclaim_list; 44160ce86c7SWei Liu reclaim_list = f; 44260ce86c7SWei Liu f->fs_reclaim.fd = f->fs.fd; 44360ce86c7SWei Liu f->fs.fd = -1; 44460ce86c7SWei Liu reclaim_count++; 44560ce86c7SWei Liu } 44660ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 44760ce86c7SWei Liu if (f->fs.dir != NULL) { 44860ce86c7SWei Liu /* 44960ce86c7SWei Liu * Up the reference count so that 45060ce86c7SWei Liu * a clunk request won't free this fid 45160ce86c7SWei Liu */ 45260ce86c7SWei Liu f->ref++; 45360ce86c7SWei Liu f->rclm_lst = reclaim_list; 45460ce86c7SWei Liu reclaim_list = f; 45560ce86c7SWei Liu f->fs_reclaim.dir = f->fs.dir; 45660ce86c7SWei Liu f->fs.dir = NULL; 45760ce86c7SWei Liu reclaim_count++; 45860ce86c7SWei Liu } 45960ce86c7SWei Liu } 46060ce86c7SWei Liu if (reclaim_count >= open_fd_rc) { 46160ce86c7SWei Liu break; 46260ce86c7SWei Liu } 46360ce86c7SWei Liu } 46460ce86c7SWei Liu /* 46560ce86c7SWei Liu * Now close the fid in reclaim list. Free them if they 46660ce86c7SWei Liu * are already clunked. 46760ce86c7SWei Liu */ 46860ce86c7SWei Liu while (reclaim_list) { 46960ce86c7SWei Liu f = reclaim_list; 47060ce86c7SWei Liu reclaim_list = f->rclm_lst; 47160ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 47260ce86c7SWei Liu v9fs_co_close(pdu, &f->fs_reclaim); 47360ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 47460ce86c7SWei Liu v9fs_co_closedir(pdu, &f->fs_reclaim); 47560ce86c7SWei Liu } 47660ce86c7SWei Liu f->rclm_lst = NULL; 47760ce86c7SWei Liu /* 47860ce86c7SWei Liu * Now drop the fid reference, free it 47960ce86c7SWei Liu * if clunked. 48060ce86c7SWei Liu */ 48160ce86c7SWei Liu put_fid(pdu, f); 48260ce86c7SWei Liu } 48360ce86c7SWei Liu } 48460ce86c7SWei Liu 48560ce86c7SWei Liu static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) 48660ce86c7SWei Liu { 48760ce86c7SWei Liu int err; 48860ce86c7SWei Liu V9fsState *s = pdu->s; 48960ce86c7SWei Liu V9fsFidState *fidp, head_fid; 49060ce86c7SWei Liu 49160ce86c7SWei Liu head_fid.next = s->fid_list; 49260ce86c7SWei Liu for (fidp = s->fid_list; fidp; fidp = fidp->next) { 49360ce86c7SWei Liu if (fidp->path.size != path->size) { 49460ce86c7SWei Liu continue; 49560ce86c7SWei Liu } 49660ce86c7SWei Liu if (!memcmp(fidp->path.data, path->data, path->size)) { 49760ce86c7SWei Liu /* Mark the fid non reclaimable. */ 49860ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 49960ce86c7SWei Liu 50060ce86c7SWei Liu /* reopen the file/dir if already closed */ 50160ce86c7SWei Liu err = v9fs_reopen_fid(pdu, fidp); 50260ce86c7SWei Liu if (err < 0) { 50360ce86c7SWei Liu return -1; 50460ce86c7SWei Liu } 50560ce86c7SWei Liu /* 50660ce86c7SWei Liu * Go back to head of fid list because 50760ce86c7SWei Liu * the list could have got updated when 50860ce86c7SWei Liu * switched to the worker thread 50960ce86c7SWei Liu */ 51060ce86c7SWei Liu if (err == 0) { 51160ce86c7SWei Liu fidp = &head_fid; 51260ce86c7SWei Liu } 51360ce86c7SWei Liu } 51460ce86c7SWei Liu } 51560ce86c7SWei Liu return 0; 51660ce86c7SWei Liu } 51760ce86c7SWei Liu 51860ce86c7SWei Liu static void virtfs_reset(V9fsPDU *pdu) 51960ce86c7SWei Liu { 52060ce86c7SWei Liu V9fsState *s = pdu->s; 52160ce86c7SWei Liu V9fsFidState *fidp = NULL; 52260ce86c7SWei Liu 52360ce86c7SWei Liu /* Free all fids */ 52460ce86c7SWei Liu while (s->fid_list) { 52560ce86c7SWei Liu fidp = s->fid_list; 52660ce86c7SWei Liu s->fid_list = fidp->next; 52760ce86c7SWei Liu 52860ce86c7SWei Liu if (fidp->ref) { 52960ce86c7SWei Liu fidp->clunked = 1; 53060ce86c7SWei Liu } else { 53160ce86c7SWei Liu free_fid(pdu, fidp); 53260ce86c7SWei Liu } 53360ce86c7SWei Liu } 53460ce86c7SWei Liu if (fidp) { 53560ce86c7SWei Liu /* One or more unclunked fids found... */ 53660ce86c7SWei Liu error_report("9pfs:%s: One or more uncluncked fids " 53760ce86c7SWei Liu "found during reset", __func__); 53860ce86c7SWei Liu } 53960ce86c7SWei Liu } 54060ce86c7SWei Liu 54160ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 54260ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 54360ce86c7SWei Liu 54460ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 54560ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 54660ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 54760ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 54860ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 54960ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 55060ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 55160ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 55260ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 55360ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 55460ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 55560ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 55660ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 55760ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 55860ce86c7SWei Liu 55960ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 56060ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 56160ce86c7SWei Liu P9_STAT_MODE_LINK | \ 56260ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 56360ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 56460ce86c7SWei Liu P9_STAT_MODE_SOCKET) 56560ce86c7SWei Liu 56660ce86c7SWei Liu /* This is the algorithm from ufs in spfs */ 56760ce86c7SWei Liu static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) 56860ce86c7SWei Liu { 56960ce86c7SWei Liu size_t size; 57060ce86c7SWei Liu 57160ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 57260ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 57360ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 57460ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 57560ce86c7SWei Liu qidp->type = 0; 57660ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 57760ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 57860ce86c7SWei Liu } 57960ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 58060ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 58160ce86c7SWei Liu } 58260ce86c7SWei Liu } 58360ce86c7SWei Liu 58460ce86c7SWei Liu static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp) 58560ce86c7SWei Liu { 58660ce86c7SWei Liu struct stat stbuf; 58760ce86c7SWei Liu int err; 58860ce86c7SWei Liu 58960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 59060ce86c7SWei Liu if (err < 0) { 59160ce86c7SWei Liu return err; 59260ce86c7SWei Liu } 59360ce86c7SWei Liu stat_to_qid(&stbuf, qidp); 59460ce86c7SWei Liu return 0; 59560ce86c7SWei Liu } 59660ce86c7SWei Liu 59760ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 59860ce86c7SWei Liu { 59960ce86c7SWei Liu V9fsPDU *pdu = NULL; 60060ce86c7SWei Liu 60160ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 60260ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 60360ce86c7SWei Liu QLIST_REMOVE(pdu, next); 60460ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 60560ce86c7SWei Liu } 60660ce86c7SWei Liu return pdu; 60760ce86c7SWei Liu } 60860ce86c7SWei Liu 60960ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 61060ce86c7SWei Liu { 61160ce86c7SWei Liu if (pdu) { 61260ce86c7SWei Liu V9fsState *s = pdu->s; 61360ce86c7SWei Liu /* 61460ce86c7SWei Liu * Cancelled pdu are added back to the freelist 61560ce86c7SWei Liu * by flush request . 61660ce86c7SWei Liu */ 61760ce86c7SWei Liu if (!pdu->cancelled) { 61860ce86c7SWei Liu QLIST_REMOVE(pdu, next); 61960ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 62060ce86c7SWei Liu } 62160ce86c7SWei Liu } 62260ce86c7SWei Liu } 62360ce86c7SWei Liu 62460ce86c7SWei Liu /* 62560ce86c7SWei Liu * We don't do error checking for pdu_marshal/unmarshal here 62660ce86c7SWei Liu * because we always expect to have enough space to encode 62760ce86c7SWei Liu * error details 62860ce86c7SWei Liu */ 62960ce86c7SWei Liu static void pdu_complete(V9fsPDU *pdu, ssize_t len) 63060ce86c7SWei Liu { 63160ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 63260ce86c7SWei Liu V9fsState *s = pdu->s; 63360ce86c7SWei Liu 63460ce86c7SWei Liu if (len < 0) { 63560ce86c7SWei Liu int err = -len; 63660ce86c7SWei Liu len = 7; 63760ce86c7SWei Liu 63860ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 63960ce86c7SWei Liu V9fsString str; 64060ce86c7SWei Liu 64160ce86c7SWei Liu str.data = strerror(err); 64260ce86c7SWei Liu str.size = strlen(str.data); 64360ce86c7SWei Liu 64460ce86c7SWei Liu len += pdu_marshal(pdu, len, "s", &str); 64560ce86c7SWei Liu id = P9_RERROR; 64660ce86c7SWei Liu } 64760ce86c7SWei Liu 64860ce86c7SWei Liu len += pdu_marshal(pdu, len, "d", err); 64960ce86c7SWei Liu 65060ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 65160ce86c7SWei Liu id = P9_RLERROR; 65260ce86c7SWei Liu } 65360ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 65460ce86c7SWei Liu } 65560ce86c7SWei Liu 65660ce86c7SWei Liu /* fill out the header */ 65760ce86c7SWei Liu pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); 65860ce86c7SWei Liu 65960ce86c7SWei Liu /* keep these in sync */ 66060ce86c7SWei Liu pdu->size = len; 66160ce86c7SWei Liu pdu->id = id; 66260ce86c7SWei Liu 66360ce86c7SWei Liu pdu_push_and_notify(pdu); 66460ce86c7SWei Liu 66560ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 66660ce86c7SWei Liu qemu_co_queue_next(&pdu->complete); 66760ce86c7SWei Liu 66860ce86c7SWei Liu pdu_free(pdu); 66960ce86c7SWei Liu } 67060ce86c7SWei Liu 67160ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 67260ce86c7SWei Liu { 67360ce86c7SWei Liu mode_t ret; 67460ce86c7SWei Liu 67560ce86c7SWei Liu ret = mode & 0777; 67660ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 67760ce86c7SWei Liu ret |= S_IFDIR; 67860ce86c7SWei Liu } 67960ce86c7SWei Liu 68060ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 68160ce86c7SWei Liu ret |= S_IFLNK; 68260ce86c7SWei Liu } 68360ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 68460ce86c7SWei Liu ret |= S_IFSOCK; 68560ce86c7SWei Liu } 68660ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 68760ce86c7SWei Liu ret |= S_IFIFO; 68860ce86c7SWei Liu } 68960ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 69060ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 69160ce86c7SWei Liu ret |= S_IFCHR; 69260ce86c7SWei Liu } else { 69360ce86c7SWei Liu ret |= S_IFBLK; 69460ce86c7SWei Liu } 69560ce86c7SWei Liu } 69660ce86c7SWei Liu 69760ce86c7SWei Liu if (!(ret&~0777)) { 69860ce86c7SWei Liu ret |= S_IFREG; 69960ce86c7SWei Liu } 70060ce86c7SWei Liu 70160ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 70260ce86c7SWei Liu ret |= S_ISUID; 70360ce86c7SWei Liu } 70460ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 70560ce86c7SWei Liu ret |= S_ISGID; 70660ce86c7SWei Liu } 70760ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 70860ce86c7SWei Liu ret |= S_ISVTX; 70960ce86c7SWei Liu } 71060ce86c7SWei Liu 71160ce86c7SWei Liu return ret; 71260ce86c7SWei Liu } 71360ce86c7SWei Liu 71460ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 71560ce86c7SWei Liu { 71660ce86c7SWei Liu if (stat->type == -1 && 71760ce86c7SWei Liu stat->dev == -1 && 71860ce86c7SWei Liu stat->qid.type == -1 && 71960ce86c7SWei Liu stat->qid.version == -1 && 72060ce86c7SWei Liu stat->qid.path == -1 && 72160ce86c7SWei Liu stat->mode == -1 && 72260ce86c7SWei Liu stat->atime == -1 && 72360ce86c7SWei Liu stat->mtime == -1 && 72460ce86c7SWei Liu stat->length == -1 && 72560ce86c7SWei Liu !stat->name.size && 72660ce86c7SWei Liu !stat->uid.size && 72760ce86c7SWei Liu !stat->gid.size && 72860ce86c7SWei Liu !stat->muid.size && 72960ce86c7SWei Liu stat->n_uid == -1 && 73060ce86c7SWei Liu stat->n_gid == -1 && 73160ce86c7SWei Liu stat->n_muid == -1) { 73260ce86c7SWei Liu return 1; 73360ce86c7SWei Liu } 73460ce86c7SWei Liu 73560ce86c7SWei Liu return 0; 73660ce86c7SWei Liu } 73760ce86c7SWei Liu 73860ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 73960ce86c7SWei Liu { 74060ce86c7SWei Liu v9fs_string_init(&stat->name); 74160ce86c7SWei Liu v9fs_string_init(&stat->uid); 74260ce86c7SWei Liu v9fs_string_init(&stat->gid); 74360ce86c7SWei Liu v9fs_string_init(&stat->muid); 74460ce86c7SWei Liu v9fs_string_init(&stat->extension); 74560ce86c7SWei Liu } 74660ce86c7SWei Liu 74760ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 74860ce86c7SWei Liu { 74960ce86c7SWei Liu v9fs_string_free(&stat->name); 75060ce86c7SWei Liu v9fs_string_free(&stat->uid); 75160ce86c7SWei Liu v9fs_string_free(&stat->gid); 75260ce86c7SWei Liu v9fs_string_free(&stat->muid); 75360ce86c7SWei Liu v9fs_string_free(&stat->extension); 75460ce86c7SWei Liu } 75560ce86c7SWei Liu 75660ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 75760ce86c7SWei Liu { 75860ce86c7SWei Liu uint32_t mode; 75960ce86c7SWei Liu 76060ce86c7SWei Liu mode = stbuf->st_mode & 0777; 76160ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 76260ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 76360ce86c7SWei Liu } 76460ce86c7SWei Liu 76560ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 76660ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 76760ce86c7SWei Liu } 76860ce86c7SWei Liu 76960ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 77060ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 77160ce86c7SWei Liu } 77260ce86c7SWei Liu 77360ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 77460ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 77560ce86c7SWei Liu } 77660ce86c7SWei Liu 77760ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 77860ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 77960ce86c7SWei Liu } 78060ce86c7SWei Liu 78160ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 78260ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 78360ce86c7SWei Liu } 78460ce86c7SWei Liu 78560ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 78660ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 78760ce86c7SWei Liu } 78860ce86c7SWei Liu 78960ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 79060ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 79160ce86c7SWei Liu } 79260ce86c7SWei Liu 79360ce86c7SWei Liu return mode; 79460ce86c7SWei Liu } 79560ce86c7SWei Liu 79660ce86c7SWei Liu static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, 79760ce86c7SWei Liu const struct stat *stbuf, 79860ce86c7SWei Liu V9fsStat *v9stat) 79960ce86c7SWei Liu { 80060ce86c7SWei Liu int err; 80160ce86c7SWei Liu const char *str; 80260ce86c7SWei Liu 80360ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 80460ce86c7SWei Liu 80560ce86c7SWei Liu stat_to_qid(stbuf, &v9stat->qid); 80660ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 80760ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 80860ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 80960ce86c7SWei Liu v9stat->length = stbuf->st_size; 81060ce86c7SWei Liu 81160ce86c7SWei Liu v9fs_string_null(&v9stat->uid); 81260ce86c7SWei Liu v9fs_string_null(&v9stat->gid); 81360ce86c7SWei Liu v9fs_string_null(&v9stat->muid); 81460ce86c7SWei Liu 81560ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 81660ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 81760ce86c7SWei Liu v9stat->n_muid = 0; 81860ce86c7SWei Liu 81960ce86c7SWei Liu v9fs_string_null(&v9stat->extension); 82060ce86c7SWei Liu 82160ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 82260ce86c7SWei Liu err = v9fs_co_readlink(pdu, name, &v9stat->extension); 82360ce86c7SWei Liu if (err < 0) { 82460ce86c7SWei Liu return err; 82560ce86c7SWei Liu } 82660ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 82760ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 82860ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 82960ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 83060ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 83160ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 83260ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 83360ce86c7SWei Liu } 83460ce86c7SWei Liu 83560ce86c7SWei Liu str = strrchr(name->data, '/'); 83660ce86c7SWei Liu if (str) { 83760ce86c7SWei Liu str += 1; 83860ce86c7SWei Liu } else { 83960ce86c7SWei Liu str = name->data; 84060ce86c7SWei Liu } 84160ce86c7SWei Liu 84260ce86c7SWei Liu v9fs_string_sprintf(&v9stat->name, "%s", str); 84360ce86c7SWei Liu 84460ce86c7SWei Liu v9stat->size = 61 + 84560ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 84660ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 84760ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 84860ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 84960ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 85060ce86c7SWei Liu return 0; 85160ce86c7SWei Liu } 85260ce86c7SWei Liu 85360ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 85460ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 85560ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 85660ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 85760ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 85860ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 85960ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 86060ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 86160ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 86260ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 86360ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 86460ce86c7SWei Liu 86560ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 86660ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 86760ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 86860ce86c7SWei Liu 86960ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 87060ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 87160ce86c7SWei Liu 87260ce86c7SWei Liu 87360ce86c7SWei Liu static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, 87460ce86c7SWei Liu V9fsStatDotl *v9lstat) 87560ce86c7SWei Liu { 87660ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 87760ce86c7SWei Liu 87860ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 87960ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 88060ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 88160ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 88260ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 88360ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 88460ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 88560ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 88660ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 88760ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 88860ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 88960ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 89060ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 89160ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 89260ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 89360ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 89460ce86c7SWei Liu 89560ce86c7SWei Liu stat_to_qid(stbuf, &v9lstat->qid); 89660ce86c7SWei Liu } 89760ce86c7SWei Liu 89860ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 89960ce86c7SWei Liu { 90060ce86c7SWei Liu int i; 90160ce86c7SWei Liu 90260ce86c7SWei Liu printf("sg[%d]: {", cnt); 90360ce86c7SWei Liu for (i = 0; i < cnt; i++) { 90460ce86c7SWei Liu if (i) { 90560ce86c7SWei Liu printf(", "); 90660ce86c7SWei Liu } 90760ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 90860ce86c7SWei Liu } 90960ce86c7SWei Liu printf("}\n"); 91060ce86c7SWei Liu } 91160ce86c7SWei Liu 91260ce86c7SWei Liu /* Will call this only for path name based fid */ 91360ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 91460ce86c7SWei Liu { 91560ce86c7SWei Liu V9fsPath str; 91660ce86c7SWei Liu v9fs_path_init(&str); 91760ce86c7SWei Liu v9fs_path_copy(&str, dst); 91860ce86c7SWei Liu v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len); 91960ce86c7SWei Liu v9fs_path_free(&str); 92060ce86c7SWei Liu /* +1 to include terminating NULL */ 92160ce86c7SWei Liu dst->size++; 92260ce86c7SWei Liu } 92360ce86c7SWei Liu 92460ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 92560ce86c7SWei Liu { 92660ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 92760ce86c7SWei Liu } 92860ce86c7SWei Liu 92960ce86c7SWei Liu static void v9fs_version(void *opaque) 93060ce86c7SWei Liu { 93160ce86c7SWei Liu ssize_t err; 93260ce86c7SWei Liu V9fsPDU *pdu = opaque; 93360ce86c7SWei Liu V9fsState *s = pdu->s; 93460ce86c7SWei Liu V9fsString version; 93560ce86c7SWei Liu size_t offset = 7; 93660ce86c7SWei Liu 93760ce86c7SWei Liu v9fs_string_init(&version); 93860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 93960ce86c7SWei Liu if (err < 0) { 94060ce86c7SWei Liu offset = err; 94160ce86c7SWei Liu goto out; 94260ce86c7SWei Liu } 94360ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 94460ce86c7SWei Liu 94560ce86c7SWei Liu virtfs_reset(pdu); 94660ce86c7SWei Liu 94760ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 94860ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 94960ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 95060ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 95160ce86c7SWei Liu } else { 95260ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 95360ce86c7SWei Liu } 95460ce86c7SWei Liu 95560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 95660ce86c7SWei Liu if (err < 0) { 95760ce86c7SWei Liu offset = err; 95860ce86c7SWei Liu goto out; 95960ce86c7SWei Liu } 96060ce86c7SWei Liu offset += err; 96160ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 96260ce86c7SWei Liu out: 96360ce86c7SWei Liu pdu_complete(pdu, offset); 96460ce86c7SWei Liu v9fs_string_free(&version); 96560ce86c7SWei Liu } 96660ce86c7SWei Liu 96760ce86c7SWei Liu static void v9fs_attach(void *opaque) 96860ce86c7SWei Liu { 96960ce86c7SWei Liu V9fsPDU *pdu = opaque; 97060ce86c7SWei Liu V9fsState *s = pdu->s; 97160ce86c7SWei Liu int32_t fid, afid, n_uname; 97260ce86c7SWei Liu V9fsString uname, aname; 97360ce86c7SWei Liu V9fsFidState *fidp; 97460ce86c7SWei Liu size_t offset = 7; 97560ce86c7SWei Liu V9fsQID qid; 97660ce86c7SWei Liu ssize_t err; 97760ce86c7SWei Liu 97860ce86c7SWei Liu v9fs_string_init(&uname); 97960ce86c7SWei Liu v9fs_string_init(&aname); 98060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 98160ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 98260ce86c7SWei Liu if (err < 0) { 98360ce86c7SWei Liu goto out_nofid; 98460ce86c7SWei Liu } 98560ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 98660ce86c7SWei Liu 98760ce86c7SWei Liu fidp = alloc_fid(s, fid); 98860ce86c7SWei Liu if (fidp == NULL) { 98960ce86c7SWei Liu err = -EINVAL; 99060ce86c7SWei Liu goto out_nofid; 99160ce86c7SWei Liu } 99260ce86c7SWei Liu fidp->uid = n_uname; 99360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 99460ce86c7SWei Liu if (err < 0) { 99560ce86c7SWei Liu err = -EINVAL; 99660ce86c7SWei Liu clunk_fid(s, fid); 99760ce86c7SWei Liu goto out; 99860ce86c7SWei Liu } 99960ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 100060ce86c7SWei Liu if (err < 0) { 100160ce86c7SWei Liu err = -EINVAL; 100260ce86c7SWei Liu clunk_fid(s, fid); 100360ce86c7SWei Liu goto out; 100460ce86c7SWei Liu } 100560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 100660ce86c7SWei Liu if (err < 0) { 100760ce86c7SWei Liu clunk_fid(s, fid); 100860ce86c7SWei Liu goto out; 100960ce86c7SWei Liu } 101060ce86c7SWei Liu err += offset; 101160ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 101260ce86c7SWei Liu qid.type, qid.version, qid.path); 101360ce86c7SWei Liu /* 101460ce86c7SWei Liu * disable migration if we haven't done already. 101560ce86c7SWei Liu * attach could get called multiple times for the same export. 101660ce86c7SWei Liu */ 101760ce86c7SWei Liu if (!s->migration_blocker) { 101860ce86c7SWei Liu s->root_fid = fid; 101960ce86c7SWei Liu error_setg(&s->migration_blocker, 102060ce86c7SWei Liu "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 102160ce86c7SWei Liu s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 102260ce86c7SWei Liu migrate_add_blocker(s->migration_blocker); 102360ce86c7SWei Liu } 102460ce86c7SWei Liu out: 102560ce86c7SWei Liu put_fid(pdu, fidp); 102660ce86c7SWei Liu out_nofid: 102760ce86c7SWei Liu pdu_complete(pdu, err); 102860ce86c7SWei Liu v9fs_string_free(&uname); 102960ce86c7SWei Liu v9fs_string_free(&aname); 103060ce86c7SWei Liu } 103160ce86c7SWei Liu 103260ce86c7SWei Liu static void v9fs_stat(void *opaque) 103360ce86c7SWei Liu { 103460ce86c7SWei Liu int32_t fid; 103560ce86c7SWei Liu V9fsStat v9stat; 103660ce86c7SWei Liu ssize_t err = 0; 103760ce86c7SWei Liu size_t offset = 7; 103860ce86c7SWei Liu struct stat stbuf; 103960ce86c7SWei Liu V9fsFidState *fidp; 104060ce86c7SWei Liu V9fsPDU *pdu = opaque; 104160ce86c7SWei Liu 104260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 104360ce86c7SWei Liu if (err < 0) { 104460ce86c7SWei Liu goto out_nofid; 104560ce86c7SWei Liu } 104660ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 104760ce86c7SWei Liu 104860ce86c7SWei Liu fidp = get_fid(pdu, fid); 104960ce86c7SWei Liu if (fidp == NULL) { 105060ce86c7SWei Liu err = -ENOENT; 105160ce86c7SWei Liu goto out_nofid; 105260ce86c7SWei Liu } 105360ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 105460ce86c7SWei Liu if (err < 0) { 105560ce86c7SWei Liu goto out; 105660ce86c7SWei Liu } 105760ce86c7SWei Liu err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); 105860ce86c7SWei Liu if (err < 0) { 105960ce86c7SWei Liu goto out; 106060ce86c7SWei Liu } 106160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 106260ce86c7SWei Liu if (err < 0) { 106360ce86c7SWei Liu v9fs_stat_free(&v9stat); 106460ce86c7SWei Liu goto out; 106560ce86c7SWei Liu } 106660ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 106760ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 106860ce86c7SWei Liu err += offset; 106960ce86c7SWei Liu v9fs_stat_free(&v9stat); 107060ce86c7SWei Liu out: 107160ce86c7SWei Liu put_fid(pdu, fidp); 107260ce86c7SWei Liu out_nofid: 107360ce86c7SWei Liu pdu_complete(pdu, err); 107460ce86c7SWei Liu } 107560ce86c7SWei Liu 107660ce86c7SWei Liu static void v9fs_getattr(void *opaque) 107760ce86c7SWei Liu { 107860ce86c7SWei Liu int32_t fid; 107960ce86c7SWei Liu size_t offset = 7; 108060ce86c7SWei Liu ssize_t retval = 0; 108160ce86c7SWei Liu struct stat stbuf; 108260ce86c7SWei Liu V9fsFidState *fidp; 108360ce86c7SWei Liu uint64_t request_mask; 108460ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 108560ce86c7SWei Liu V9fsPDU *pdu = opaque; 108660ce86c7SWei Liu V9fsState *s = pdu->s; 108760ce86c7SWei Liu 108860ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 108960ce86c7SWei Liu if (retval < 0) { 109060ce86c7SWei Liu goto out_nofid; 109160ce86c7SWei Liu } 109260ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 109360ce86c7SWei Liu 109460ce86c7SWei Liu fidp = get_fid(pdu, fid); 109560ce86c7SWei Liu if (fidp == NULL) { 109660ce86c7SWei Liu retval = -ENOENT; 109760ce86c7SWei Liu goto out_nofid; 109860ce86c7SWei Liu } 109960ce86c7SWei Liu /* 110060ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 110160ce86c7SWei Liu * need to look at request_mask. 110260ce86c7SWei Liu */ 110360ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 110460ce86c7SWei Liu if (retval < 0) { 110560ce86c7SWei Liu goto out; 110660ce86c7SWei Liu } 110760ce86c7SWei Liu stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); 110860ce86c7SWei Liu 110960ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 111060ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 111160ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 111260ce86c7SWei Liu switch (retval) { 111360ce86c7SWei Liu case 0: 111460ce86c7SWei Liu /* we have valid st_gen: update result mask */ 111560ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 111660ce86c7SWei Liu break; 111760ce86c7SWei Liu case -EINTR: 111860ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 111960ce86c7SWei Liu goto out; 112060ce86c7SWei Liu default: 112160ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 112260ce86c7SWei Liu break; 112360ce86c7SWei Liu } 112460ce86c7SWei Liu } 112560ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 112660ce86c7SWei Liu if (retval < 0) { 112760ce86c7SWei Liu goto out; 112860ce86c7SWei Liu } 112960ce86c7SWei Liu retval += offset; 113060ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 113160ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 113260ce86c7SWei Liu v9stat_dotl.st_gid); 113360ce86c7SWei Liu out: 113460ce86c7SWei Liu put_fid(pdu, fidp); 113560ce86c7SWei Liu out_nofid: 113660ce86c7SWei Liu pdu_complete(pdu, retval); 113760ce86c7SWei Liu } 113860ce86c7SWei Liu 113960ce86c7SWei Liu /* Attribute flags */ 114060ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 114160ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 114260ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 114360ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 114460ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 114560ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 114660ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 114760ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 114860ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 114960ce86c7SWei Liu 115060ce86c7SWei Liu #define P9_ATTR_MASK 127 115160ce86c7SWei Liu 115260ce86c7SWei Liu static void v9fs_setattr(void *opaque) 115360ce86c7SWei Liu { 115460ce86c7SWei Liu int err = 0; 115560ce86c7SWei Liu int32_t fid; 115660ce86c7SWei Liu V9fsFidState *fidp; 115760ce86c7SWei Liu size_t offset = 7; 115860ce86c7SWei Liu V9fsIattr v9iattr; 115960ce86c7SWei Liu V9fsPDU *pdu = opaque; 116060ce86c7SWei Liu 116160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 116260ce86c7SWei Liu if (err < 0) { 116360ce86c7SWei Liu goto out_nofid; 116460ce86c7SWei Liu } 116560ce86c7SWei Liu 116660ce86c7SWei Liu fidp = get_fid(pdu, fid); 116760ce86c7SWei Liu if (fidp == NULL) { 116860ce86c7SWei Liu err = -EINVAL; 116960ce86c7SWei Liu goto out_nofid; 117060ce86c7SWei Liu } 117160ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 117260ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 117360ce86c7SWei Liu if (err < 0) { 117460ce86c7SWei Liu goto out; 117560ce86c7SWei Liu } 117660ce86c7SWei Liu } 117760ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 117860ce86c7SWei Liu struct timespec times[2]; 117960ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 118060ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 118160ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 118260ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 118360ce86c7SWei Liu } else { 118460ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 118560ce86c7SWei Liu } 118660ce86c7SWei Liu } else { 118760ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 118860ce86c7SWei Liu } 118960ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 119060ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 119160ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 119260ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 119360ce86c7SWei Liu } else { 119460ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 119560ce86c7SWei Liu } 119660ce86c7SWei Liu } else { 119760ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 119860ce86c7SWei Liu } 119960ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 120060ce86c7SWei Liu if (err < 0) { 120160ce86c7SWei Liu goto out; 120260ce86c7SWei Liu } 120360ce86c7SWei Liu } 120460ce86c7SWei Liu /* 120560ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 120660ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 120760ce86c7SWei Liu */ 120860ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 120960ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 121060ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 121160ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 121260ce86c7SWei Liu v9iattr.uid = -1; 121360ce86c7SWei Liu } 121460ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 121560ce86c7SWei Liu v9iattr.gid = -1; 121660ce86c7SWei Liu } 121760ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 121860ce86c7SWei Liu v9iattr.gid); 121960ce86c7SWei Liu if (err < 0) { 122060ce86c7SWei Liu goto out; 122160ce86c7SWei Liu } 122260ce86c7SWei Liu } 122360ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 122460ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 122560ce86c7SWei Liu if (err < 0) { 122660ce86c7SWei Liu goto out; 122760ce86c7SWei Liu } 122860ce86c7SWei Liu } 122960ce86c7SWei Liu err = offset; 123060ce86c7SWei Liu out: 123160ce86c7SWei Liu put_fid(pdu, fidp); 123260ce86c7SWei Liu out_nofid: 123360ce86c7SWei Liu pdu_complete(pdu, err); 123460ce86c7SWei Liu } 123560ce86c7SWei Liu 123660ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 123760ce86c7SWei Liu { 123860ce86c7SWei Liu int i; 123960ce86c7SWei Liu ssize_t err; 124060ce86c7SWei Liu size_t offset = 7; 124160ce86c7SWei Liu 124260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 124360ce86c7SWei Liu if (err < 0) { 124460ce86c7SWei Liu return err; 124560ce86c7SWei Liu } 124660ce86c7SWei Liu offset += err; 124760ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 124860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 124960ce86c7SWei Liu if (err < 0) { 125060ce86c7SWei Liu return err; 125160ce86c7SWei Liu } 125260ce86c7SWei Liu offset += err; 125360ce86c7SWei Liu } 125460ce86c7SWei Liu return offset; 125560ce86c7SWei Liu } 125660ce86c7SWei Liu 125760ce86c7SWei Liu static void v9fs_walk(void *opaque) 125860ce86c7SWei Liu { 125960ce86c7SWei Liu int name_idx; 126060ce86c7SWei Liu V9fsQID *qids = NULL; 126160ce86c7SWei Liu int i, err = 0; 126260ce86c7SWei Liu V9fsPath dpath, path; 126360ce86c7SWei Liu uint16_t nwnames; 126460ce86c7SWei Liu struct stat stbuf; 126560ce86c7SWei Liu size_t offset = 7; 126660ce86c7SWei Liu int32_t fid, newfid; 126760ce86c7SWei Liu V9fsString *wnames = NULL; 126860ce86c7SWei Liu V9fsFidState *fidp; 126960ce86c7SWei Liu V9fsFidState *newfidp = NULL; 127060ce86c7SWei Liu V9fsPDU *pdu = opaque; 127160ce86c7SWei Liu V9fsState *s = pdu->s; 127260ce86c7SWei Liu 127360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 127460ce86c7SWei Liu if (err < 0) { 127560ce86c7SWei Liu pdu_complete(pdu, err); 127660ce86c7SWei Liu return ; 127760ce86c7SWei Liu } 127860ce86c7SWei Liu offset += err; 127960ce86c7SWei Liu 128060ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 128160ce86c7SWei Liu 128260ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 128360ce86c7SWei Liu wnames = g_malloc0(sizeof(wnames[0]) * nwnames); 128460ce86c7SWei Liu qids = g_malloc0(sizeof(qids[0]) * nwnames); 128560ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 128660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 128760ce86c7SWei Liu if (err < 0) { 128860ce86c7SWei Liu goto out_nofid; 128960ce86c7SWei Liu } 129060ce86c7SWei Liu offset += err; 129160ce86c7SWei Liu } 129260ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 129360ce86c7SWei Liu err = -EINVAL; 129460ce86c7SWei Liu goto out_nofid; 129560ce86c7SWei Liu } 129660ce86c7SWei Liu fidp = get_fid(pdu, fid); 129760ce86c7SWei Liu if (fidp == NULL) { 129860ce86c7SWei Liu err = -ENOENT; 129960ce86c7SWei Liu goto out_nofid; 130060ce86c7SWei Liu } 130160ce86c7SWei Liu v9fs_path_init(&dpath); 130260ce86c7SWei Liu v9fs_path_init(&path); 130360ce86c7SWei Liu /* 130460ce86c7SWei Liu * Both dpath and path initially poin to fidp. 130560ce86c7SWei Liu * Needed to handle request with nwnames == 0 130660ce86c7SWei Liu */ 130760ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 130860ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 130960ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 131060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path); 131160ce86c7SWei Liu if (err < 0) { 131260ce86c7SWei Liu goto out; 131360ce86c7SWei Liu } 131460ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 131560ce86c7SWei Liu if (err < 0) { 131660ce86c7SWei Liu goto out; 131760ce86c7SWei Liu } 131860ce86c7SWei Liu stat_to_qid(&stbuf, &qids[name_idx]); 131960ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 132060ce86c7SWei Liu } 132160ce86c7SWei Liu if (fid == newfid) { 132260ce86c7SWei Liu BUG_ON(fidp->fid_type != P9_FID_NONE); 132360ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 132460ce86c7SWei Liu } else { 132560ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 132660ce86c7SWei Liu if (newfidp == NULL) { 132760ce86c7SWei Liu err = -EINVAL; 132860ce86c7SWei Liu goto out; 132960ce86c7SWei Liu } 133060ce86c7SWei Liu newfidp->uid = fidp->uid; 133160ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 133260ce86c7SWei Liu } 133360ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 133460ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 133560ce86c7SWei Liu out: 133660ce86c7SWei Liu put_fid(pdu, fidp); 133760ce86c7SWei Liu if (newfidp) { 133860ce86c7SWei Liu put_fid(pdu, newfidp); 133960ce86c7SWei Liu } 134060ce86c7SWei Liu v9fs_path_free(&dpath); 134160ce86c7SWei Liu v9fs_path_free(&path); 134260ce86c7SWei Liu out_nofid: 134360ce86c7SWei Liu pdu_complete(pdu, err); 134460ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 134560ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 134660ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 134760ce86c7SWei Liu } 134860ce86c7SWei Liu g_free(wnames); 134960ce86c7SWei Liu g_free(qids); 135060ce86c7SWei Liu } 135160ce86c7SWei Liu } 135260ce86c7SWei Liu 135360ce86c7SWei Liu static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path) 135460ce86c7SWei Liu { 135560ce86c7SWei Liu struct statfs stbuf; 135660ce86c7SWei Liu int32_t iounit = 0; 135760ce86c7SWei Liu V9fsState *s = pdu->s; 135860ce86c7SWei Liu 135960ce86c7SWei Liu /* 136060ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 136160ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 136260ce86c7SWei Liu */ 136360ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 136460ce86c7SWei Liu iounit = stbuf.f_bsize; 136560ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 136660ce86c7SWei Liu } 136760ce86c7SWei Liu if (!iounit) { 136860ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 136960ce86c7SWei Liu } 137060ce86c7SWei Liu return iounit; 137160ce86c7SWei Liu } 137260ce86c7SWei Liu 137360ce86c7SWei Liu static void v9fs_open(void *opaque) 137460ce86c7SWei Liu { 137560ce86c7SWei Liu int flags; 137660ce86c7SWei Liu int32_t fid; 137760ce86c7SWei Liu int32_t mode; 137860ce86c7SWei Liu V9fsQID qid; 137960ce86c7SWei Liu int iounit = 0; 138060ce86c7SWei Liu ssize_t err = 0; 138160ce86c7SWei Liu size_t offset = 7; 138260ce86c7SWei Liu struct stat stbuf; 138360ce86c7SWei Liu V9fsFidState *fidp; 138460ce86c7SWei Liu V9fsPDU *pdu = opaque; 138560ce86c7SWei Liu V9fsState *s = pdu->s; 138660ce86c7SWei Liu 138760ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 138860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 138960ce86c7SWei Liu } else { 139060ce86c7SWei Liu uint8_t modebyte; 139160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 139260ce86c7SWei Liu mode = modebyte; 139360ce86c7SWei Liu } 139460ce86c7SWei Liu if (err < 0) { 139560ce86c7SWei Liu goto out_nofid; 139660ce86c7SWei Liu } 139760ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 139860ce86c7SWei Liu 139960ce86c7SWei Liu fidp = get_fid(pdu, fid); 140060ce86c7SWei Liu if (fidp == NULL) { 140160ce86c7SWei Liu err = -ENOENT; 140260ce86c7SWei Liu goto out_nofid; 140360ce86c7SWei Liu } 140460ce86c7SWei Liu BUG_ON(fidp->fid_type != P9_FID_NONE); 140560ce86c7SWei Liu 140660ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 140760ce86c7SWei Liu if (err < 0) { 140860ce86c7SWei Liu goto out; 140960ce86c7SWei Liu } 141060ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 141160ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 141260ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 141360ce86c7SWei Liu if (err < 0) { 141460ce86c7SWei Liu goto out; 141560ce86c7SWei Liu } 141660ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 141760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 141860ce86c7SWei Liu if (err < 0) { 141960ce86c7SWei Liu goto out; 142060ce86c7SWei Liu } 142160ce86c7SWei Liu err += offset; 142260ce86c7SWei Liu } else { 142360ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 142460ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 142560ce86c7SWei Liu } else { 142660ce86c7SWei Liu flags = omode_to_uflags(mode); 142760ce86c7SWei Liu } 142860ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 142960ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 143060ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 143160ce86c7SWei Liu err = -EROFS; 143260ce86c7SWei Liu goto out; 143360ce86c7SWei Liu } 143460ce86c7SWei Liu } 143560ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 143660ce86c7SWei Liu if (err < 0) { 143760ce86c7SWei Liu goto out; 143860ce86c7SWei Liu } 143960ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 144060ce86c7SWei Liu fidp->open_flags = flags; 144160ce86c7SWei Liu if (flags & O_EXCL) { 144260ce86c7SWei Liu /* 144360ce86c7SWei Liu * We let the host file system do O_EXCL check 144460ce86c7SWei Liu * We should not reclaim such fd 144560ce86c7SWei Liu */ 144660ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 144760ce86c7SWei Liu } 144860ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 144960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 145060ce86c7SWei Liu if (err < 0) { 145160ce86c7SWei Liu goto out; 145260ce86c7SWei Liu } 145360ce86c7SWei Liu err += offset; 145460ce86c7SWei Liu } 145560ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 145660ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 145760ce86c7SWei Liu out: 145860ce86c7SWei Liu put_fid(pdu, fidp); 145960ce86c7SWei Liu out_nofid: 146060ce86c7SWei Liu pdu_complete(pdu, err); 146160ce86c7SWei Liu } 146260ce86c7SWei Liu 146360ce86c7SWei Liu static void v9fs_lcreate(void *opaque) 146460ce86c7SWei Liu { 146560ce86c7SWei Liu int32_t dfid, flags, mode; 146660ce86c7SWei Liu gid_t gid; 146760ce86c7SWei Liu ssize_t err = 0; 146860ce86c7SWei Liu ssize_t offset = 7; 146960ce86c7SWei Liu V9fsString name; 147060ce86c7SWei Liu V9fsFidState *fidp; 147160ce86c7SWei Liu struct stat stbuf; 147260ce86c7SWei Liu V9fsQID qid; 147360ce86c7SWei Liu int32_t iounit; 147460ce86c7SWei Liu V9fsPDU *pdu = opaque; 147560ce86c7SWei Liu 147660ce86c7SWei Liu v9fs_string_init(&name); 147760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 147860ce86c7SWei Liu &name, &flags, &mode, &gid); 147960ce86c7SWei Liu if (err < 0) { 148060ce86c7SWei Liu goto out_nofid; 148160ce86c7SWei Liu } 148260ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 148360ce86c7SWei Liu 148460ce86c7SWei Liu fidp = get_fid(pdu, dfid); 148560ce86c7SWei Liu if (fidp == NULL) { 148660ce86c7SWei Liu err = -ENOENT; 148760ce86c7SWei Liu goto out_nofid; 148860ce86c7SWei Liu } 148960ce86c7SWei Liu 149060ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 149160ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 149260ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 149360ce86c7SWei Liu if (err < 0) { 149460ce86c7SWei Liu goto out; 149560ce86c7SWei Liu } 149660ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 149760ce86c7SWei Liu fidp->open_flags = flags; 149860ce86c7SWei Liu if (flags & O_EXCL) { 149960ce86c7SWei Liu /* 150060ce86c7SWei Liu * We let the host file system do O_EXCL check 150160ce86c7SWei Liu * We should not reclaim such fd 150260ce86c7SWei Liu */ 150360ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 150460ce86c7SWei Liu } 150560ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 150660ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 150760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 150860ce86c7SWei Liu if (err < 0) { 150960ce86c7SWei Liu goto out; 151060ce86c7SWei Liu } 151160ce86c7SWei Liu err += offset; 151260ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 151360ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 151460ce86c7SWei Liu out: 151560ce86c7SWei Liu put_fid(pdu, fidp); 151660ce86c7SWei Liu out_nofid: 151760ce86c7SWei Liu pdu_complete(pdu, err); 151860ce86c7SWei Liu v9fs_string_free(&name); 151960ce86c7SWei Liu } 152060ce86c7SWei Liu 152160ce86c7SWei Liu static void v9fs_fsync(void *opaque) 152260ce86c7SWei Liu { 152360ce86c7SWei Liu int err; 152460ce86c7SWei Liu int32_t fid; 152560ce86c7SWei Liu int datasync; 152660ce86c7SWei Liu size_t offset = 7; 152760ce86c7SWei Liu V9fsFidState *fidp; 152860ce86c7SWei Liu V9fsPDU *pdu = opaque; 152960ce86c7SWei Liu 153060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 153160ce86c7SWei Liu if (err < 0) { 153260ce86c7SWei Liu goto out_nofid; 153360ce86c7SWei Liu } 153460ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 153560ce86c7SWei Liu 153660ce86c7SWei Liu fidp = get_fid(pdu, fid); 153760ce86c7SWei Liu if (fidp == NULL) { 153860ce86c7SWei Liu err = -ENOENT; 153960ce86c7SWei Liu goto out_nofid; 154060ce86c7SWei Liu } 154160ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 154260ce86c7SWei Liu if (!err) { 154360ce86c7SWei Liu err = offset; 154460ce86c7SWei Liu } 154560ce86c7SWei Liu put_fid(pdu, fidp); 154660ce86c7SWei Liu out_nofid: 154760ce86c7SWei Liu pdu_complete(pdu, err); 154860ce86c7SWei Liu } 154960ce86c7SWei Liu 155060ce86c7SWei Liu static void v9fs_clunk(void *opaque) 155160ce86c7SWei Liu { 155260ce86c7SWei Liu int err; 155360ce86c7SWei Liu int32_t fid; 155460ce86c7SWei Liu size_t offset = 7; 155560ce86c7SWei Liu V9fsFidState *fidp; 155660ce86c7SWei Liu V9fsPDU *pdu = opaque; 155760ce86c7SWei Liu V9fsState *s = pdu->s; 155860ce86c7SWei Liu 155960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 156060ce86c7SWei Liu if (err < 0) { 156160ce86c7SWei Liu goto out_nofid; 156260ce86c7SWei Liu } 156360ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 156460ce86c7SWei Liu 156560ce86c7SWei Liu fidp = clunk_fid(s, fid); 156660ce86c7SWei Liu if (fidp == NULL) { 156760ce86c7SWei Liu err = -ENOENT; 156860ce86c7SWei Liu goto out_nofid; 156960ce86c7SWei Liu } 157060ce86c7SWei Liu /* 157160ce86c7SWei Liu * Bump the ref so that put_fid will 157260ce86c7SWei Liu * free the fid. 157360ce86c7SWei Liu */ 157460ce86c7SWei Liu fidp->ref++; 157560ce86c7SWei Liu err = put_fid(pdu, fidp); 157660ce86c7SWei Liu if (!err) { 157760ce86c7SWei Liu err = offset; 157860ce86c7SWei Liu } 157960ce86c7SWei Liu out_nofid: 158060ce86c7SWei Liu pdu_complete(pdu, err); 158160ce86c7SWei Liu } 158260ce86c7SWei Liu 158360ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 158460ce86c7SWei Liu uint64_t off, uint32_t max_count) 158560ce86c7SWei Liu { 158660ce86c7SWei Liu ssize_t err; 158760ce86c7SWei Liu size_t offset = 7; 158860ce86c7SWei Liu int read_count; 158960ce86c7SWei Liu int64_t xattr_len; 159000588a0aSWei Liu V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); 159151b19ebeSPaolo Bonzini VirtQueueElement *elem = v->elems[pdu->idx]; 159260ce86c7SWei Liu 159360ce86c7SWei Liu xattr_len = fidp->fs.xattr.len; 159460ce86c7SWei Liu read_count = xattr_len - off; 159560ce86c7SWei Liu if (read_count > max_count) { 159660ce86c7SWei Liu read_count = max_count; 159760ce86c7SWei Liu } else if (read_count < 0) { 159860ce86c7SWei Liu /* 159960ce86c7SWei Liu * read beyond XATTR value 160060ce86c7SWei Liu */ 160160ce86c7SWei Liu read_count = 0; 160260ce86c7SWei Liu } 160360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 160460ce86c7SWei Liu if (err < 0) { 160560ce86c7SWei Liu return err; 160660ce86c7SWei Liu } 160760ce86c7SWei Liu offset += err; 160800588a0aSWei Liu 160900588a0aSWei Liu err = v9fs_pack(elem->in_sg, elem->in_num, offset, 161060ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 161160ce86c7SWei Liu read_count); 161260ce86c7SWei Liu if (err < 0) { 161360ce86c7SWei Liu return err; 161460ce86c7SWei Liu } 161560ce86c7SWei Liu offset += err; 161660ce86c7SWei Liu return offset; 161760ce86c7SWei Liu } 161860ce86c7SWei Liu 161960ce86c7SWei Liu static int v9fs_do_readdir_with_stat(V9fsPDU *pdu, 162060ce86c7SWei Liu V9fsFidState *fidp, uint32_t max_count) 162160ce86c7SWei Liu { 162260ce86c7SWei Liu V9fsPath path; 162360ce86c7SWei Liu V9fsStat v9stat; 162460ce86c7SWei Liu int len, err = 0; 162560ce86c7SWei Liu int32_t count = 0; 162660ce86c7SWei Liu struct stat stbuf; 162760ce86c7SWei Liu off_t saved_dir_pos; 162860ce86c7SWei Liu struct dirent *dent, *result; 162960ce86c7SWei Liu 163060ce86c7SWei Liu /* save the directory position */ 163160ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 163260ce86c7SWei Liu if (saved_dir_pos < 0) { 163360ce86c7SWei Liu return saved_dir_pos; 163460ce86c7SWei Liu } 163560ce86c7SWei Liu 163660ce86c7SWei Liu dent = g_malloc(sizeof(struct dirent)); 163760ce86c7SWei Liu 163860ce86c7SWei Liu while (1) { 163960ce86c7SWei Liu v9fs_path_init(&path); 164060ce86c7SWei Liu err = v9fs_co_readdir_r(pdu, fidp, dent, &result); 164160ce86c7SWei Liu if (err || !result) { 164260ce86c7SWei Liu break; 164360ce86c7SWei Liu } 164460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 164560ce86c7SWei Liu if (err < 0) { 164660ce86c7SWei Liu goto out; 164760ce86c7SWei Liu } 164860ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 164960ce86c7SWei Liu if (err < 0) { 165060ce86c7SWei Liu goto out; 165160ce86c7SWei Liu } 165260ce86c7SWei Liu err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); 165360ce86c7SWei Liu if (err < 0) { 165460ce86c7SWei Liu goto out; 165560ce86c7SWei Liu } 165660ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 165760ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 165860ce86c7SWei Liu if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { 165960ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 166060ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 166160ce86c7SWei Liu v9fs_stat_free(&v9stat); 166260ce86c7SWei Liu v9fs_path_free(&path); 166360ce86c7SWei Liu g_free(dent); 166460ce86c7SWei Liu return count; 166560ce86c7SWei Liu } 166660ce86c7SWei Liu count += len; 166760ce86c7SWei Liu v9fs_stat_free(&v9stat); 166860ce86c7SWei Liu v9fs_path_free(&path); 166960ce86c7SWei Liu saved_dir_pos = dent->d_off; 167060ce86c7SWei Liu } 167160ce86c7SWei Liu out: 167260ce86c7SWei Liu g_free(dent); 167360ce86c7SWei Liu v9fs_path_free(&path); 167460ce86c7SWei Liu if (err < 0) { 167560ce86c7SWei Liu return err; 167660ce86c7SWei Liu } 167760ce86c7SWei Liu return count; 167860ce86c7SWei Liu } 167960ce86c7SWei Liu 168060ce86c7SWei Liu /* 168160ce86c7SWei Liu * Create a QEMUIOVector for a sub-region of PDU iovecs 168260ce86c7SWei Liu * 168360ce86c7SWei Liu * @qiov: uninitialized QEMUIOVector 168460ce86c7SWei Liu * @skip: number of bytes to skip from beginning of PDU 168560ce86c7SWei Liu * @size: number of bytes to include 168660ce86c7SWei Liu * @is_write: true - write, false - read 168760ce86c7SWei Liu * 168860ce86c7SWei Liu * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 168960ce86c7SWei Liu * with qemu_iovec_destroy(). 169060ce86c7SWei Liu */ 169160ce86c7SWei Liu static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 169260ce86c7SWei Liu size_t skip, size_t size, 169360ce86c7SWei Liu bool is_write) 169460ce86c7SWei Liu { 169560ce86c7SWei Liu QEMUIOVector elem; 169660ce86c7SWei Liu struct iovec *iov; 169760ce86c7SWei Liu unsigned int niov; 169860ce86c7SWei Liu 169960ce86c7SWei Liu virtio_init_iov_from_pdu(pdu, &iov, &niov, is_write); 170060ce86c7SWei Liu 170160ce86c7SWei Liu qemu_iovec_init_external(&elem, iov, niov); 170260ce86c7SWei Liu qemu_iovec_init(qiov, niov); 170360ce86c7SWei Liu qemu_iovec_concat(qiov, &elem, skip, size); 170460ce86c7SWei Liu } 170560ce86c7SWei Liu 170660ce86c7SWei Liu static void v9fs_read(void *opaque) 170760ce86c7SWei Liu { 170860ce86c7SWei Liu int32_t fid; 170960ce86c7SWei Liu uint64_t off; 171060ce86c7SWei Liu ssize_t err = 0; 171160ce86c7SWei Liu int32_t count = 0; 171260ce86c7SWei Liu size_t offset = 7; 171360ce86c7SWei Liu uint32_t max_count; 171460ce86c7SWei Liu V9fsFidState *fidp; 171560ce86c7SWei Liu V9fsPDU *pdu = opaque; 171660ce86c7SWei Liu V9fsState *s = pdu->s; 171760ce86c7SWei Liu 171860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 171960ce86c7SWei Liu if (err < 0) { 172060ce86c7SWei Liu goto out_nofid; 172160ce86c7SWei Liu } 172260ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 172360ce86c7SWei Liu 172460ce86c7SWei Liu fidp = get_fid(pdu, fid); 172560ce86c7SWei Liu if (fidp == NULL) { 172660ce86c7SWei Liu err = -EINVAL; 172760ce86c7SWei Liu goto out_nofid; 172860ce86c7SWei Liu } 172960ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 173060ce86c7SWei Liu 173160ce86c7SWei Liu if (off == 0) { 173260ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 173360ce86c7SWei Liu } 173460ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 173560ce86c7SWei Liu if (count < 0) { 173660ce86c7SWei Liu err = count; 173760ce86c7SWei Liu goto out; 173860ce86c7SWei Liu } 173960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 174060ce86c7SWei Liu if (err < 0) { 174160ce86c7SWei Liu goto out; 174260ce86c7SWei Liu } 174360ce86c7SWei Liu err += offset + count; 174460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 174560ce86c7SWei Liu QEMUIOVector qiov_full; 174660ce86c7SWei Liu QEMUIOVector qiov; 174760ce86c7SWei Liu int32_t len; 174860ce86c7SWei Liu 174960ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 175060ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 175160ce86c7SWei Liu do { 175260ce86c7SWei Liu qemu_iovec_reset(&qiov); 175360ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 175460ce86c7SWei Liu if (0) { 175560ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 175660ce86c7SWei Liu } 175760ce86c7SWei Liu /* Loop in case of EINTR */ 175860ce86c7SWei Liu do { 175960ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 176060ce86c7SWei Liu if (len >= 0) { 176160ce86c7SWei Liu off += len; 176260ce86c7SWei Liu count += len; 176360ce86c7SWei Liu } 176460ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 176560ce86c7SWei Liu if (len < 0) { 176660ce86c7SWei Liu /* IO error return the error */ 176760ce86c7SWei Liu err = len; 176860ce86c7SWei Liu goto out; 176960ce86c7SWei Liu } 177060ce86c7SWei Liu } while (count < max_count && len > 0); 177160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 177260ce86c7SWei Liu if (err < 0) { 177360ce86c7SWei Liu goto out; 177460ce86c7SWei Liu } 177560ce86c7SWei Liu err += offset + count; 177660ce86c7SWei Liu qemu_iovec_destroy(&qiov); 177760ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 177860ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 177960ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 178060ce86c7SWei Liu } else { 178160ce86c7SWei Liu err = -EINVAL; 178260ce86c7SWei Liu } 178360ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 178460ce86c7SWei Liu out: 178560ce86c7SWei Liu put_fid(pdu, fidp); 178660ce86c7SWei Liu out_nofid: 178760ce86c7SWei Liu pdu_complete(pdu, err); 178860ce86c7SWei Liu } 178960ce86c7SWei Liu 179060ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 179160ce86c7SWei Liu { 179260ce86c7SWei Liu /* 179360ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 179460ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 179560ce86c7SWei Liu */ 179660ce86c7SWei Liu return 24 + v9fs_string_size(name); 179760ce86c7SWei Liu } 179860ce86c7SWei Liu 179960ce86c7SWei Liu static int v9fs_do_readdir(V9fsPDU *pdu, 180060ce86c7SWei Liu V9fsFidState *fidp, int32_t max_count) 180160ce86c7SWei Liu { 180260ce86c7SWei Liu size_t size; 180360ce86c7SWei Liu V9fsQID qid; 180460ce86c7SWei Liu V9fsString name; 180560ce86c7SWei Liu int len, err = 0; 180660ce86c7SWei Liu int32_t count = 0; 180760ce86c7SWei Liu off_t saved_dir_pos; 180860ce86c7SWei Liu struct dirent *dent, *result; 180960ce86c7SWei Liu 181060ce86c7SWei Liu /* save the directory position */ 181160ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 181260ce86c7SWei Liu if (saved_dir_pos < 0) { 181360ce86c7SWei Liu return saved_dir_pos; 181460ce86c7SWei Liu } 181560ce86c7SWei Liu 181660ce86c7SWei Liu dent = g_malloc(sizeof(struct dirent)); 181760ce86c7SWei Liu 181860ce86c7SWei Liu while (1) { 181960ce86c7SWei Liu err = v9fs_co_readdir_r(pdu, fidp, dent, &result); 182060ce86c7SWei Liu if (err || !result) { 182160ce86c7SWei Liu break; 182260ce86c7SWei Liu } 182360ce86c7SWei Liu v9fs_string_init(&name); 182460ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 182560ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 182660ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 182760ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 182860ce86c7SWei Liu v9fs_string_free(&name); 182960ce86c7SWei Liu g_free(dent); 183060ce86c7SWei Liu return count; 183160ce86c7SWei Liu } 183260ce86c7SWei Liu /* 183360ce86c7SWei Liu * Fill up just the path field of qid because the client uses 183460ce86c7SWei Liu * only that. To fill the entire qid structure we will have 183560ce86c7SWei Liu * to stat each dirent found, which is expensive 183660ce86c7SWei Liu */ 183760ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 183860ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 183960ce86c7SWei Liu /* Fill the other fields with dummy values */ 184060ce86c7SWei Liu qid.type = 0; 184160ce86c7SWei Liu qid.version = 0; 184260ce86c7SWei Liu 184360ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 184460ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 184560ce86c7SWei Liu &qid, dent->d_off, 184660ce86c7SWei Liu dent->d_type, &name); 184760ce86c7SWei Liu if (len < 0) { 184860ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 184960ce86c7SWei Liu v9fs_string_free(&name); 185060ce86c7SWei Liu g_free(dent); 185160ce86c7SWei Liu return len; 185260ce86c7SWei Liu } 185360ce86c7SWei Liu count += len; 185460ce86c7SWei Liu v9fs_string_free(&name); 185560ce86c7SWei Liu saved_dir_pos = dent->d_off; 185660ce86c7SWei Liu } 185760ce86c7SWei Liu g_free(dent); 185860ce86c7SWei Liu if (err < 0) { 185960ce86c7SWei Liu return err; 186060ce86c7SWei Liu } 186160ce86c7SWei Liu return count; 186260ce86c7SWei Liu } 186360ce86c7SWei Liu 186460ce86c7SWei Liu static void v9fs_readdir(void *opaque) 186560ce86c7SWei Liu { 186660ce86c7SWei Liu int32_t fid; 186760ce86c7SWei Liu V9fsFidState *fidp; 186860ce86c7SWei Liu ssize_t retval = 0; 186960ce86c7SWei Liu size_t offset = 7; 187060ce86c7SWei Liu uint64_t initial_offset; 187160ce86c7SWei Liu int32_t count; 187260ce86c7SWei Liu uint32_t max_count; 187360ce86c7SWei Liu V9fsPDU *pdu = opaque; 187460ce86c7SWei Liu 187560ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 187660ce86c7SWei Liu &initial_offset, &max_count); 187760ce86c7SWei Liu if (retval < 0) { 187860ce86c7SWei Liu goto out_nofid; 187960ce86c7SWei Liu } 188060ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 188160ce86c7SWei Liu 188260ce86c7SWei Liu fidp = get_fid(pdu, fid); 188360ce86c7SWei Liu if (fidp == NULL) { 188460ce86c7SWei Liu retval = -EINVAL; 188560ce86c7SWei Liu goto out_nofid; 188660ce86c7SWei Liu } 188760ce86c7SWei Liu if (!fidp->fs.dir) { 188860ce86c7SWei Liu retval = -EINVAL; 188960ce86c7SWei Liu goto out; 189060ce86c7SWei Liu } 189160ce86c7SWei Liu if (initial_offset == 0) { 189260ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 189360ce86c7SWei Liu } else { 189460ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 189560ce86c7SWei Liu } 189660ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 189760ce86c7SWei Liu if (count < 0) { 189860ce86c7SWei Liu retval = count; 189960ce86c7SWei Liu goto out; 190060ce86c7SWei Liu } 190160ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 190260ce86c7SWei Liu if (retval < 0) { 190360ce86c7SWei Liu goto out; 190460ce86c7SWei Liu } 190560ce86c7SWei Liu retval += count + offset; 190660ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 190760ce86c7SWei Liu out: 190860ce86c7SWei Liu put_fid(pdu, fidp); 190960ce86c7SWei Liu out_nofid: 191060ce86c7SWei Liu pdu_complete(pdu, retval); 191160ce86c7SWei Liu } 191260ce86c7SWei Liu 191360ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 191460ce86c7SWei Liu uint64_t off, uint32_t count, 191560ce86c7SWei Liu struct iovec *sg, int cnt) 191660ce86c7SWei Liu { 191760ce86c7SWei Liu int i, to_copy; 191860ce86c7SWei Liu ssize_t err = 0; 191960ce86c7SWei Liu int write_count; 192060ce86c7SWei Liu int64_t xattr_len; 192160ce86c7SWei Liu size_t offset = 7; 192260ce86c7SWei Liu 192360ce86c7SWei Liu 192460ce86c7SWei Liu xattr_len = fidp->fs.xattr.len; 192560ce86c7SWei Liu write_count = xattr_len - off; 192660ce86c7SWei Liu if (write_count > count) { 192760ce86c7SWei Liu write_count = count; 192860ce86c7SWei Liu } else if (write_count < 0) { 192960ce86c7SWei Liu /* 193060ce86c7SWei Liu * write beyond XATTR value len specified in 193160ce86c7SWei Liu * xattrcreate 193260ce86c7SWei Liu */ 193360ce86c7SWei Liu err = -ENOSPC; 193460ce86c7SWei Liu goto out; 193560ce86c7SWei Liu } 193660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 193760ce86c7SWei Liu if (err < 0) { 193860ce86c7SWei Liu return err; 193960ce86c7SWei Liu } 194060ce86c7SWei Liu err += offset; 194160ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 194260ce86c7SWei Liu /* 194360ce86c7SWei Liu * Now copy the content from sg list 194460ce86c7SWei Liu */ 194560ce86c7SWei Liu for (i = 0; i < cnt; i++) { 194660ce86c7SWei Liu if (write_count > sg[i].iov_len) { 194760ce86c7SWei Liu to_copy = sg[i].iov_len; 194860ce86c7SWei Liu } else { 194960ce86c7SWei Liu to_copy = write_count; 195060ce86c7SWei Liu } 195160ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 195260ce86c7SWei Liu /* updating vs->off since we are not using below */ 195360ce86c7SWei Liu off += to_copy; 195460ce86c7SWei Liu write_count -= to_copy; 195560ce86c7SWei Liu } 195660ce86c7SWei Liu out: 195760ce86c7SWei Liu return err; 195860ce86c7SWei Liu } 195960ce86c7SWei Liu 196060ce86c7SWei Liu static void v9fs_write(void *opaque) 196160ce86c7SWei Liu { 196260ce86c7SWei Liu ssize_t err; 196360ce86c7SWei Liu int32_t fid; 196460ce86c7SWei Liu uint64_t off; 196560ce86c7SWei Liu uint32_t count; 196660ce86c7SWei Liu int32_t len = 0; 196760ce86c7SWei Liu int32_t total = 0; 196860ce86c7SWei Liu size_t offset = 7; 196960ce86c7SWei Liu V9fsFidState *fidp; 197060ce86c7SWei Liu V9fsPDU *pdu = opaque; 197160ce86c7SWei Liu V9fsState *s = pdu->s; 197260ce86c7SWei Liu QEMUIOVector qiov_full; 197360ce86c7SWei Liu QEMUIOVector qiov; 197460ce86c7SWei Liu 197560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 197660ce86c7SWei Liu if (err < 0) { 197760ce86c7SWei Liu pdu_complete(pdu, err); 197860ce86c7SWei Liu return; 197960ce86c7SWei Liu } 198060ce86c7SWei Liu offset += err; 198160ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 198260ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 198360ce86c7SWei Liu 198460ce86c7SWei Liu fidp = get_fid(pdu, fid); 198560ce86c7SWei Liu if (fidp == NULL) { 198660ce86c7SWei Liu err = -EINVAL; 198760ce86c7SWei Liu goto out_nofid; 198860ce86c7SWei Liu } 198960ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 199060ce86c7SWei Liu if (fidp->fs.fd == -1) { 199160ce86c7SWei Liu err = -EINVAL; 199260ce86c7SWei Liu goto out; 199360ce86c7SWei Liu } 199460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 199560ce86c7SWei Liu /* 199660ce86c7SWei Liu * setxattr operation 199760ce86c7SWei Liu */ 199860ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 199960ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 200060ce86c7SWei Liu goto out; 200160ce86c7SWei Liu } else { 200260ce86c7SWei Liu err = -EINVAL; 200360ce86c7SWei Liu goto out; 200460ce86c7SWei Liu } 200560ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 200660ce86c7SWei Liu do { 200760ce86c7SWei Liu qemu_iovec_reset(&qiov); 200860ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 200960ce86c7SWei Liu if (0) { 201060ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 201160ce86c7SWei Liu } 201260ce86c7SWei Liu /* Loop in case of EINTR */ 201360ce86c7SWei Liu do { 201460ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 201560ce86c7SWei Liu if (len >= 0) { 201660ce86c7SWei Liu off += len; 201760ce86c7SWei Liu total += len; 201860ce86c7SWei Liu } 201960ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 202060ce86c7SWei Liu if (len < 0) { 202160ce86c7SWei Liu /* IO error return the error */ 202260ce86c7SWei Liu err = len; 202360ce86c7SWei Liu goto out_qiov; 202460ce86c7SWei Liu } 202560ce86c7SWei Liu } while (total < count && len > 0); 202660ce86c7SWei Liu 202760ce86c7SWei Liu offset = 7; 202860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 202960ce86c7SWei Liu if (err < 0) { 203060ce86c7SWei Liu goto out; 203160ce86c7SWei Liu } 203260ce86c7SWei Liu err += offset; 203360ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 203460ce86c7SWei Liu out_qiov: 203560ce86c7SWei Liu qemu_iovec_destroy(&qiov); 203660ce86c7SWei Liu out: 203760ce86c7SWei Liu put_fid(pdu, fidp); 203860ce86c7SWei Liu out_nofid: 203960ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 204060ce86c7SWei Liu pdu_complete(pdu, err); 204160ce86c7SWei Liu } 204260ce86c7SWei Liu 204360ce86c7SWei Liu static void v9fs_create(void *opaque) 204460ce86c7SWei Liu { 204560ce86c7SWei Liu int32_t fid; 204660ce86c7SWei Liu int err = 0; 204760ce86c7SWei Liu size_t offset = 7; 204860ce86c7SWei Liu V9fsFidState *fidp; 204960ce86c7SWei Liu V9fsQID qid; 205060ce86c7SWei Liu int32_t perm; 205160ce86c7SWei Liu int8_t mode; 205260ce86c7SWei Liu V9fsPath path; 205360ce86c7SWei Liu struct stat stbuf; 205460ce86c7SWei Liu V9fsString name; 205560ce86c7SWei Liu V9fsString extension; 205660ce86c7SWei Liu int iounit; 205760ce86c7SWei Liu V9fsPDU *pdu = opaque; 205860ce86c7SWei Liu 205960ce86c7SWei Liu v9fs_path_init(&path); 206060ce86c7SWei Liu v9fs_string_init(&name); 206160ce86c7SWei Liu v9fs_string_init(&extension); 206260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 206360ce86c7SWei Liu &perm, &mode, &extension); 206460ce86c7SWei Liu if (err < 0) { 206560ce86c7SWei Liu goto out_nofid; 206660ce86c7SWei Liu } 206760ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 206860ce86c7SWei Liu 206960ce86c7SWei Liu fidp = get_fid(pdu, fid); 207060ce86c7SWei Liu if (fidp == NULL) { 207160ce86c7SWei Liu err = -EINVAL; 207260ce86c7SWei Liu goto out_nofid; 207360ce86c7SWei Liu } 207460ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 207560ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 207660ce86c7SWei Liu fidp->uid, -1, &stbuf); 207760ce86c7SWei Liu if (err < 0) { 207860ce86c7SWei Liu goto out; 207960ce86c7SWei Liu } 208060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 208160ce86c7SWei Liu if (err < 0) { 208260ce86c7SWei Liu goto out; 208360ce86c7SWei Liu } 208460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 208560ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 208660ce86c7SWei Liu if (err < 0) { 208760ce86c7SWei Liu goto out; 208860ce86c7SWei Liu } 208960ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 209060ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 209160ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 209260ce86c7SWei Liu extension.data, -1 , &stbuf); 209360ce86c7SWei Liu if (err < 0) { 209460ce86c7SWei Liu goto out; 209560ce86c7SWei Liu } 209660ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 209760ce86c7SWei Liu if (err < 0) { 209860ce86c7SWei Liu goto out; 209960ce86c7SWei Liu } 210060ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 210160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 210260ce86c7SWei Liu int32_t ofid = atoi(extension.data); 210360ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 210460ce86c7SWei Liu if (ofidp == NULL) { 210560ce86c7SWei Liu err = -EINVAL; 210660ce86c7SWei Liu goto out; 210760ce86c7SWei Liu } 210860ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 210960ce86c7SWei Liu put_fid(pdu, ofidp); 211060ce86c7SWei Liu if (err < 0) { 211160ce86c7SWei Liu goto out; 211260ce86c7SWei Liu } 211360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 211460ce86c7SWei Liu if (err < 0) { 211560ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 211660ce86c7SWei Liu goto out; 211760ce86c7SWei Liu } 211860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 211960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 212060ce86c7SWei Liu if (err < 0) { 212160ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 212260ce86c7SWei Liu goto out; 212360ce86c7SWei Liu } 212460ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 212560ce86c7SWei Liu char ctype; 212660ce86c7SWei Liu uint32_t major, minor; 212760ce86c7SWei Liu mode_t nmode = 0; 212860ce86c7SWei Liu 212960ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 213060ce86c7SWei Liu err = -errno; 213160ce86c7SWei Liu goto out; 213260ce86c7SWei Liu } 213360ce86c7SWei Liu 213460ce86c7SWei Liu switch (ctype) { 213560ce86c7SWei Liu case 'c': 213660ce86c7SWei Liu nmode = S_IFCHR; 213760ce86c7SWei Liu break; 213860ce86c7SWei Liu case 'b': 213960ce86c7SWei Liu nmode = S_IFBLK; 214060ce86c7SWei Liu break; 214160ce86c7SWei Liu default: 214260ce86c7SWei Liu err = -EIO; 214360ce86c7SWei Liu goto out; 214460ce86c7SWei Liu } 214560ce86c7SWei Liu 214660ce86c7SWei Liu nmode |= perm & 0777; 214760ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 214860ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 214960ce86c7SWei Liu if (err < 0) { 215060ce86c7SWei Liu goto out; 215160ce86c7SWei Liu } 215260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 215360ce86c7SWei Liu if (err < 0) { 215460ce86c7SWei Liu goto out; 215560ce86c7SWei Liu } 215660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 215760ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 215860ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 215960ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 216060ce86c7SWei Liu if (err < 0) { 216160ce86c7SWei Liu goto out; 216260ce86c7SWei Liu } 216360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 216460ce86c7SWei Liu if (err < 0) { 216560ce86c7SWei Liu goto out; 216660ce86c7SWei Liu } 216760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 216860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 216960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 217060ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 217160ce86c7SWei Liu if (err < 0) { 217260ce86c7SWei Liu goto out; 217360ce86c7SWei Liu } 217460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 217560ce86c7SWei Liu if (err < 0) { 217660ce86c7SWei Liu goto out; 217760ce86c7SWei Liu } 217860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 217960ce86c7SWei Liu } else { 218060ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 218160ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 218260ce86c7SWei Liu if (err < 0) { 218360ce86c7SWei Liu goto out; 218460ce86c7SWei Liu } 218560ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 218660ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 218760ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 218860ce86c7SWei Liu /* 218960ce86c7SWei Liu * We let the host file system do O_EXCL check 219060ce86c7SWei Liu * We should not reclaim such fd 219160ce86c7SWei Liu */ 219260ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 219360ce86c7SWei Liu } 219460ce86c7SWei Liu } 219560ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 219660ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 219760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 219860ce86c7SWei Liu if (err < 0) { 219960ce86c7SWei Liu goto out; 220060ce86c7SWei Liu } 220160ce86c7SWei Liu err += offset; 220260ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 220360ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 220460ce86c7SWei Liu out: 220560ce86c7SWei Liu put_fid(pdu, fidp); 220660ce86c7SWei Liu out_nofid: 220760ce86c7SWei Liu pdu_complete(pdu, err); 220860ce86c7SWei Liu v9fs_string_free(&name); 220960ce86c7SWei Liu v9fs_string_free(&extension); 221060ce86c7SWei Liu v9fs_path_free(&path); 221160ce86c7SWei Liu } 221260ce86c7SWei Liu 221360ce86c7SWei Liu static void v9fs_symlink(void *opaque) 221460ce86c7SWei Liu { 221560ce86c7SWei Liu V9fsPDU *pdu = opaque; 221660ce86c7SWei Liu V9fsString name; 221760ce86c7SWei Liu V9fsString symname; 221860ce86c7SWei Liu V9fsFidState *dfidp; 221960ce86c7SWei Liu V9fsQID qid; 222060ce86c7SWei Liu struct stat stbuf; 222160ce86c7SWei Liu int32_t dfid; 222260ce86c7SWei Liu int err = 0; 222360ce86c7SWei Liu gid_t gid; 222460ce86c7SWei Liu size_t offset = 7; 222560ce86c7SWei Liu 222660ce86c7SWei Liu v9fs_string_init(&name); 222760ce86c7SWei Liu v9fs_string_init(&symname); 222860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 222960ce86c7SWei Liu if (err < 0) { 223060ce86c7SWei Liu goto out_nofid; 223160ce86c7SWei Liu } 223260ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 223360ce86c7SWei Liu 223460ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 223560ce86c7SWei Liu if (dfidp == NULL) { 223660ce86c7SWei Liu err = -EINVAL; 223760ce86c7SWei Liu goto out_nofid; 223860ce86c7SWei Liu } 223960ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 224060ce86c7SWei Liu if (err < 0) { 224160ce86c7SWei Liu goto out; 224260ce86c7SWei Liu } 224360ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 224460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 224560ce86c7SWei Liu if (err < 0) { 224660ce86c7SWei Liu goto out; 224760ce86c7SWei Liu } 224860ce86c7SWei Liu err += offset; 224960ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 225060ce86c7SWei Liu qid.type, qid.version, qid.path); 225160ce86c7SWei Liu out: 225260ce86c7SWei Liu put_fid(pdu, dfidp); 225360ce86c7SWei Liu out_nofid: 225460ce86c7SWei Liu pdu_complete(pdu, err); 225560ce86c7SWei Liu v9fs_string_free(&name); 225660ce86c7SWei Liu v9fs_string_free(&symname); 225760ce86c7SWei Liu } 225860ce86c7SWei Liu 225960ce86c7SWei Liu static void v9fs_flush(void *opaque) 226060ce86c7SWei Liu { 226160ce86c7SWei Liu ssize_t err; 226260ce86c7SWei Liu int16_t tag; 226360ce86c7SWei Liu size_t offset = 7; 226460ce86c7SWei Liu V9fsPDU *cancel_pdu; 226560ce86c7SWei Liu V9fsPDU *pdu = opaque; 226660ce86c7SWei Liu V9fsState *s = pdu->s; 226760ce86c7SWei Liu 226860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 226960ce86c7SWei Liu if (err < 0) { 227060ce86c7SWei Liu pdu_complete(pdu, err); 227160ce86c7SWei Liu return; 227260ce86c7SWei Liu } 227360ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 227460ce86c7SWei Liu 227560ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 227660ce86c7SWei Liu if (cancel_pdu->tag == tag) { 227760ce86c7SWei Liu break; 227860ce86c7SWei Liu } 227960ce86c7SWei Liu } 228060ce86c7SWei Liu if (cancel_pdu) { 228160ce86c7SWei Liu cancel_pdu->cancelled = 1; 228260ce86c7SWei Liu /* 228360ce86c7SWei Liu * Wait for pdu to complete. 228460ce86c7SWei Liu */ 228560ce86c7SWei Liu qemu_co_queue_wait(&cancel_pdu->complete); 228660ce86c7SWei Liu cancel_pdu->cancelled = 0; 228760ce86c7SWei Liu pdu_free(cancel_pdu); 228860ce86c7SWei Liu } 228960ce86c7SWei Liu pdu_complete(pdu, 7); 229060ce86c7SWei Liu } 229160ce86c7SWei Liu 229260ce86c7SWei Liu static void v9fs_link(void *opaque) 229360ce86c7SWei Liu { 229460ce86c7SWei Liu V9fsPDU *pdu = opaque; 229560ce86c7SWei Liu int32_t dfid, oldfid; 229660ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 229760ce86c7SWei Liu V9fsString name; 229860ce86c7SWei Liu size_t offset = 7; 229960ce86c7SWei Liu int err = 0; 230060ce86c7SWei Liu 230160ce86c7SWei Liu v9fs_string_init(&name); 230260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 230360ce86c7SWei Liu if (err < 0) { 230460ce86c7SWei Liu goto out_nofid; 230560ce86c7SWei Liu } 230660ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 230760ce86c7SWei Liu 230860ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 230960ce86c7SWei Liu if (dfidp == NULL) { 231060ce86c7SWei Liu err = -ENOENT; 231160ce86c7SWei Liu goto out_nofid; 231260ce86c7SWei Liu } 231360ce86c7SWei Liu 231460ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 231560ce86c7SWei Liu if (oldfidp == NULL) { 231660ce86c7SWei Liu err = -ENOENT; 231760ce86c7SWei Liu goto out; 231860ce86c7SWei Liu } 231960ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 232060ce86c7SWei Liu if (!err) { 232160ce86c7SWei Liu err = offset; 232260ce86c7SWei Liu } 232360ce86c7SWei Liu out: 232460ce86c7SWei Liu put_fid(pdu, dfidp); 232560ce86c7SWei Liu out_nofid: 232660ce86c7SWei Liu v9fs_string_free(&name); 232760ce86c7SWei Liu pdu_complete(pdu, err); 232860ce86c7SWei Liu } 232960ce86c7SWei Liu 233060ce86c7SWei Liu /* Only works with path name based fid */ 233160ce86c7SWei Liu static void v9fs_remove(void *opaque) 233260ce86c7SWei Liu { 233360ce86c7SWei Liu int32_t fid; 233460ce86c7SWei Liu int err = 0; 233560ce86c7SWei Liu size_t offset = 7; 233660ce86c7SWei Liu V9fsFidState *fidp; 233760ce86c7SWei Liu V9fsPDU *pdu = opaque; 233860ce86c7SWei Liu 233960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 234060ce86c7SWei Liu if (err < 0) { 234160ce86c7SWei Liu goto out_nofid; 234260ce86c7SWei Liu } 234360ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 234460ce86c7SWei Liu 234560ce86c7SWei Liu fidp = get_fid(pdu, fid); 234660ce86c7SWei Liu if (fidp == NULL) { 234760ce86c7SWei Liu err = -EINVAL; 234860ce86c7SWei Liu goto out_nofid; 234960ce86c7SWei Liu } 235060ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 235160ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 235260ce86c7SWei Liu err = -EOPNOTSUPP; 235360ce86c7SWei Liu goto out_err; 235460ce86c7SWei Liu } 235560ce86c7SWei Liu /* 235660ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 235760ce86c7SWei Liu * the file later. So don't reclaim fd 235860ce86c7SWei Liu */ 235960ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 236060ce86c7SWei Liu if (err < 0) { 236160ce86c7SWei Liu goto out_err; 236260ce86c7SWei Liu } 236360ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 236460ce86c7SWei Liu if (!err) { 236560ce86c7SWei Liu err = offset; 236660ce86c7SWei Liu } 236760ce86c7SWei Liu out_err: 236860ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 236960ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 237060ce86c7SWei Liu put_fid(pdu, fidp); 237160ce86c7SWei Liu out_nofid: 237260ce86c7SWei Liu pdu_complete(pdu, err); 237360ce86c7SWei Liu } 237460ce86c7SWei Liu 237560ce86c7SWei Liu static void v9fs_unlinkat(void *opaque) 237660ce86c7SWei Liu { 237760ce86c7SWei Liu int err = 0; 237860ce86c7SWei Liu V9fsString name; 237960ce86c7SWei Liu int32_t dfid, flags; 238060ce86c7SWei Liu size_t offset = 7; 238160ce86c7SWei Liu V9fsPath path; 238260ce86c7SWei Liu V9fsFidState *dfidp; 238360ce86c7SWei Liu V9fsPDU *pdu = opaque; 238460ce86c7SWei Liu 238560ce86c7SWei Liu v9fs_string_init(&name); 238660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 238760ce86c7SWei Liu if (err < 0) { 238860ce86c7SWei Liu goto out_nofid; 238960ce86c7SWei Liu } 239060ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 239160ce86c7SWei Liu if (dfidp == NULL) { 239260ce86c7SWei Liu err = -EINVAL; 239360ce86c7SWei Liu goto out_nofid; 239460ce86c7SWei Liu } 239560ce86c7SWei Liu /* 239660ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 239760ce86c7SWei Liu * the file later. So don't reclaim fd 239860ce86c7SWei Liu */ 239960ce86c7SWei Liu v9fs_path_init(&path); 240060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 240160ce86c7SWei Liu if (err < 0) { 240260ce86c7SWei Liu goto out_err; 240360ce86c7SWei Liu } 240460ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 240560ce86c7SWei Liu if (err < 0) { 240660ce86c7SWei Liu goto out_err; 240760ce86c7SWei Liu } 240860ce86c7SWei Liu err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); 240960ce86c7SWei Liu if (!err) { 241060ce86c7SWei Liu err = offset; 241160ce86c7SWei Liu } 241260ce86c7SWei Liu out_err: 241360ce86c7SWei Liu put_fid(pdu, dfidp); 241460ce86c7SWei Liu v9fs_path_free(&path); 241560ce86c7SWei Liu out_nofid: 241660ce86c7SWei Liu pdu_complete(pdu, err); 241760ce86c7SWei Liu v9fs_string_free(&name); 241860ce86c7SWei Liu } 241960ce86c7SWei Liu 242060ce86c7SWei Liu 242160ce86c7SWei Liu /* Only works with path name based fid */ 242260ce86c7SWei Liu static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 242360ce86c7SWei Liu int32_t newdirfid, V9fsString *name) 242460ce86c7SWei Liu { 242560ce86c7SWei Liu char *end; 242660ce86c7SWei Liu int err = 0; 242760ce86c7SWei Liu V9fsPath new_path; 242860ce86c7SWei Liu V9fsFidState *tfidp; 242960ce86c7SWei Liu V9fsState *s = pdu->s; 243060ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 243160ce86c7SWei Liu char *old_name, *new_name; 243260ce86c7SWei Liu 243360ce86c7SWei Liu v9fs_path_init(&new_path); 243460ce86c7SWei Liu if (newdirfid != -1) { 243560ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 243660ce86c7SWei Liu if (dirfidp == NULL) { 243760ce86c7SWei Liu err = -ENOENT; 243860ce86c7SWei Liu goto out_nofid; 243960ce86c7SWei Liu } 244060ce86c7SWei Liu BUG_ON(dirfidp->fid_type != P9_FID_NONE); 244160ce86c7SWei Liu v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 244260ce86c7SWei Liu } else { 244360ce86c7SWei Liu old_name = fidp->path.data; 244460ce86c7SWei Liu end = strrchr(old_name, '/'); 244560ce86c7SWei Liu if (end) { 244660ce86c7SWei Liu end++; 244760ce86c7SWei Liu } else { 244860ce86c7SWei Liu end = old_name; 244960ce86c7SWei Liu } 245060ce86c7SWei Liu new_name = g_malloc0(end - old_name + name->size + 1); 245160ce86c7SWei Liu strncat(new_name, old_name, end - old_name); 245260ce86c7SWei Liu strncat(new_name + (end - old_name), name->data, name->size); 245360ce86c7SWei Liu v9fs_co_name_to_path(pdu, NULL, new_name, &new_path); 245460ce86c7SWei Liu g_free(new_name); 245560ce86c7SWei Liu } 245660ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 245760ce86c7SWei Liu if (err < 0) { 245860ce86c7SWei Liu goto out; 245960ce86c7SWei Liu } 246060ce86c7SWei Liu /* 246160ce86c7SWei Liu * Fixup fid's pointing to the old name to 246260ce86c7SWei Liu * start pointing to the new name 246360ce86c7SWei Liu */ 246460ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 246560ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 246660ce86c7SWei Liu /* replace the name */ 246760ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 246860ce86c7SWei Liu } 246960ce86c7SWei Liu } 247060ce86c7SWei Liu out: 247160ce86c7SWei Liu if (dirfidp) { 247260ce86c7SWei Liu put_fid(pdu, dirfidp); 247360ce86c7SWei Liu } 247460ce86c7SWei Liu v9fs_path_free(&new_path); 247560ce86c7SWei Liu out_nofid: 247660ce86c7SWei Liu return err; 247760ce86c7SWei Liu } 247860ce86c7SWei Liu 247960ce86c7SWei Liu /* Only works with path name based fid */ 248060ce86c7SWei Liu static void v9fs_rename(void *opaque) 248160ce86c7SWei Liu { 248260ce86c7SWei Liu int32_t fid; 248360ce86c7SWei Liu ssize_t err = 0; 248460ce86c7SWei Liu size_t offset = 7; 248560ce86c7SWei Liu V9fsString name; 248660ce86c7SWei Liu int32_t newdirfid; 248760ce86c7SWei Liu V9fsFidState *fidp; 248860ce86c7SWei Liu V9fsPDU *pdu = opaque; 248960ce86c7SWei Liu V9fsState *s = pdu->s; 249060ce86c7SWei Liu 249160ce86c7SWei Liu v9fs_string_init(&name); 249260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 249360ce86c7SWei Liu if (err < 0) { 249460ce86c7SWei Liu goto out_nofid; 249560ce86c7SWei Liu } 249660ce86c7SWei Liu fidp = get_fid(pdu, fid); 249760ce86c7SWei Liu if (fidp == NULL) { 249860ce86c7SWei Liu err = -ENOENT; 249960ce86c7SWei Liu goto out_nofid; 250060ce86c7SWei Liu } 250160ce86c7SWei Liu BUG_ON(fidp->fid_type != P9_FID_NONE); 250260ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 250360ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 250460ce86c7SWei Liu err = -EOPNOTSUPP; 250560ce86c7SWei Liu goto out; 250660ce86c7SWei Liu } 250760ce86c7SWei Liu v9fs_path_write_lock(s); 250860ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 250960ce86c7SWei Liu v9fs_path_unlock(s); 251060ce86c7SWei Liu if (!err) { 251160ce86c7SWei Liu err = offset; 251260ce86c7SWei Liu } 251360ce86c7SWei Liu out: 251460ce86c7SWei Liu put_fid(pdu, fidp); 251560ce86c7SWei Liu out_nofid: 251660ce86c7SWei Liu pdu_complete(pdu, err); 251760ce86c7SWei Liu v9fs_string_free(&name); 251860ce86c7SWei Liu } 251960ce86c7SWei Liu 252060ce86c7SWei Liu static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 252160ce86c7SWei Liu V9fsString *old_name, V9fsPath *newdir, 252260ce86c7SWei Liu V9fsString *new_name) 252360ce86c7SWei Liu { 252460ce86c7SWei Liu V9fsFidState *tfidp; 252560ce86c7SWei Liu V9fsPath oldpath, newpath; 252660ce86c7SWei Liu V9fsState *s = pdu->s; 252760ce86c7SWei Liu 252860ce86c7SWei Liu 252960ce86c7SWei Liu v9fs_path_init(&oldpath); 253060ce86c7SWei Liu v9fs_path_init(&newpath); 253160ce86c7SWei Liu v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 253260ce86c7SWei Liu v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 253360ce86c7SWei Liu 253460ce86c7SWei Liu /* 253560ce86c7SWei Liu * Fixup fid's pointing to the old name to 253660ce86c7SWei Liu * start pointing to the new name 253760ce86c7SWei Liu */ 253860ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 253960ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 254060ce86c7SWei Liu /* replace the name */ 254160ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 254260ce86c7SWei Liu } 254360ce86c7SWei Liu } 254460ce86c7SWei Liu v9fs_path_free(&oldpath); 254560ce86c7SWei Liu v9fs_path_free(&newpath); 254660ce86c7SWei Liu } 254760ce86c7SWei Liu 254860ce86c7SWei Liu static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 254960ce86c7SWei Liu V9fsString *old_name, int32_t newdirfid, 255060ce86c7SWei Liu V9fsString *new_name) 255160ce86c7SWei Liu { 255260ce86c7SWei Liu int err = 0; 255360ce86c7SWei Liu V9fsState *s = pdu->s; 255460ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 255560ce86c7SWei Liu 255660ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 255760ce86c7SWei Liu if (olddirfidp == NULL) { 255860ce86c7SWei Liu err = -ENOENT; 255960ce86c7SWei Liu goto out; 256060ce86c7SWei Liu } 256160ce86c7SWei Liu if (newdirfid != -1) { 256260ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 256360ce86c7SWei Liu if (newdirfidp == NULL) { 256460ce86c7SWei Liu err = -ENOENT; 256560ce86c7SWei Liu goto out; 256660ce86c7SWei Liu } 256760ce86c7SWei Liu } else { 256860ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 256960ce86c7SWei Liu } 257060ce86c7SWei Liu 257160ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 257260ce86c7SWei Liu &newdirfidp->path, new_name); 257360ce86c7SWei Liu if (err < 0) { 257460ce86c7SWei Liu goto out; 257560ce86c7SWei Liu } 257660ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 257760ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 257860ce86c7SWei Liu v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 257960ce86c7SWei Liu &newdirfidp->path, new_name); 258060ce86c7SWei Liu } 258160ce86c7SWei Liu out: 258260ce86c7SWei Liu if (olddirfidp) { 258360ce86c7SWei Liu put_fid(pdu, olddirfidp); 258460ce86c7SWei Liu } 258560ce86c7SWei Liu if (newdirfidp) { 258660ce86c7SWei Liu put_fid(pdu, newdirfidp); 258760ce86c7SWei Liu } 258860ce86c7SWei Liu return err; 258960ce86c7SWei Liu } 259060ce86c7SWei Liu 259160ce86c7SWei Liu static void v9fs_renameat(void *opaque) 259260ce86c7SWei Liu { 259360ce86c7SWei Liu ssize_t err = 0; 259460ce86c7SWei Liu size_t offset = 7; 259560ce86c7SWei Liu V9fsPDU *pdu = opaque; 259660ce86c7SWei Liu V9fsState *s = pdu->s; 259760ce86c7SWei Liu int32_t olddirfid, newdirfid; 259860ce86c7SWei Liu V9fsString old_name, new_name; 259960ce86c7SWei Liu 260060ce86c7SWei Liu v9fs_string_init(&old_name); 260160ce86c7SWei Liu v9fs_string_init(&new_name); 260260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 260360ce86c7SWei Liu &old_name, &newdirfid, &new_name); 260460ce86c7SWei Liu if (err < 0) { 260560ce86c7SWei Liu goto out_err; 260660ce86c7SWei Liu } 260760ce86c7SWei Liu 260860ce86c7SWei Liu v9fs_path_write_lock(s); 260960ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 261060ce86c7SWei Liu &old_name, newdirfid, &new_name); 261160ce86c7SWei Liu v9fs_path_unlock(s); 261260ce86c7SWei Liu if (!err) { 261360ce86c7SWei Liu err = offset; 261460ce86c7SWei Liu } 261560ce86c7SWei Liu 261660ce86c7SWei Liu out_err: 261760ce86c7SWei Liu pdu_complete(pdu, err); 261860ce86c7SWei Liu v9fs_string_free(&old_name); 261960ce86c7SWei Liu v9fs_string_free(&new_name); 262060ce86c7SWei Liu } 262160ce86c7SWei Liu 262260ce86c7SWei Liu static void v9fs_wstat(void *opaque) 262360ce86c7SWei Liu { 262460ce86c7SWei Liu int32_t fid; 262560ce86c7SWei Liu int err = 0; 262660ce86c7SWei Liu int16_t unused; 262760ce86c7SWei Liu V9fsStat v9stat; 262860ce86c7SWei Liu size_t offset = 7; 262960ce86c7SWei Liu struct stat stbuf; 263060ce86c7SWei Liu V9fsFidState *fidp; 263160ce86c7SWei Liu V9fsPDU *pdu = opaque; 263260ce86c7SWei Liu 263360ce86c7SWei Liu v9fs_stat_init(&v9stat); 263460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 263560ce86c7SWei Liu if (err < 0) { 263660ce86c7SWei Liu goto out_nofid; 263760ce86c7SWei Liu } 263860ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 263960ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 264060ce86c7SWei Liu 264160ce86c7SWei Liu fidp = get_fid(pdu, fid); 264260ce86c7SWei Liu if (fidp == NULL) { 264360ce86c7SWei Liu err = -EINVAL; 264460ce86c7SWei Liu goto out_nofid; 264560ce86c7SWei Liu } 264660ce86c7SWei Liu /* do we need to sync the file? */ 264760ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 264860ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 264960ce86c7SWei Liu goto out; 265060ce86c7SWei Liu } 265160ce86c7SWei Liu if (v9stat.mode != -1) { 265260ce86c7SWei Liu uint32_t v9_mode; 265360ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 265460ce86c7SWei Liu if (err < 0) { 265560ce86c7SWei Liu goto out; 265660ce86c7SWei Liu } 265760ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 265860ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 265960ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 266060ce86c7SWei Liu /* Attempting to change the type */ 266160ce86c7SWei Liu err = -EIO; 266260ce86c7SWei Liu goto out; 266360ce86c7SWei Liu } 266460ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 266560ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 266660ce86c7SWei Liu &v9stat.extension)); 266760ce86c7SWei Liu if (err < 0) { 266860ce86c7SWei Liu goto out; 266960ce86c7SWei Liu } 267060ce86c7SWei Liu } 267160ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 267260ce86c7SWei Liu struct timespec times[2]; 267360ce86c7SWei Liu if (v9stat.atime != -1) { 267460ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 267560ce86c7SWei Liu times[0].tv_nsec = 0; 267660ce86c7SWei Liu } else { 267760ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 267860ce86c7SWei Liu } 267960ce86c7SWei Liu if (v9stat.mtime != -1) { 268060ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 268160ce86c7SWei Liu times[1].tv_nsec = 0; 268260ce86c7SWei Liu } else { 268360ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 268460ce86c7SWei Liu } 268560ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 268660ce86c7SWei Liu if (err < 0) { 268760ce86c7SWei Liu goto out; 268860ce86c7SWei Liu } 268960ce86c7SWei Liu } 269060ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 269160ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 269260ce86c7SWei Liu if (err < 0) { 269360ce86c7SWei Liu goto out; 269460ce86c7SWei Liu } 269560ce86c7SWei Liu } 269660ce86c7SWei Liu if (v9stat.name.size != 0) { 269760ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 269860ce86c7SWei Liu if (err < 0) { 269960ce86c7SWei Liu goto out; 270060ce86c7SWei Liu } 270160ce86c7SWei Liu } 270260ce86c7SWei Liu if (v9stat.length != -1) { 270360ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 270460ce86c7SWei Liu if (err < 0) { 270560ce86c7SWei Liu goto out; 270660ce86c7SWei Liu } 270760ce86c7SWei Liu } 270860ce86c7SWei Liu err = offset; 270960ce86c7SWei Liu out: 271060ce86c7SWei Liu put_fid(pdu, fidp); 271160ce86c7SWei Liu out_nofid: 271260ce86c7SWei Liu v9fs_stat_free(&v9stat); 271360ce86c7SWei Liu pdu_complete(pdu, err); 271460ce86c7SWei Liu } 271560ce86c7SWei Liu 271660ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 271760ce86c7SWei Liu { 271860ce86c7SWei Liu uint32_t f_type; 271960ce86c7SWei Liu uint32_t f_bsize; 272060ce86c7SWei Liu uint64_t f_blocks; 272160ce86c7SWei Liu uint64_t f_bfree; 272260ce86c7SWei Liu uint64_t f_bavail; 272360ce86c7SWei Liu uint64_t f_files; 272460ce86c7SWei Liu uint64_t f_ffree; 272560ce86c7SWei Liu uint64_t fsid_val; 272660ce86c7SWei Liu uint32_t f_namelen; 272760ce86c7SWei Liu size_t offset = 7; 272860ce86c7SWei Liu int32_t bsize_factor; 272960ce86c7SWei Liu 273060ce86c7SWei Liu /* 273160ce86c7SWei Liu * compute bsize factor based on host file system block size 273260ce86c7SWei Liu * and client msize 273360ce86c7SWei Liu */ 273460ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 273560ce86c7SWei Liu if (!bsize_factor) { 273660ce86c7SWei Liu bsize_factor = 1; 273760ce86c7SWei Liu } 273860ce86c7SWei Liu f_type = stbuf->f_type; 273960ce86c7SWei Liu f_bsize = stbuf->f_bsize; 274060ce86c7SWei Liu f_bsize *= bsize_factor; 274160ce86c7SWei Liu /* 274260ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 274360ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 274460ce86c7SWei Liu * blocks by bsize factor 274560ce86c7SWei Liu */ 274660ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 274760ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 274860ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 274960ce86c7SWei Liu f_files = stbuf->f_files; 275060ce86c7SWei Liu f_ffree = stbuf->f_ffree; 275160ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 275260ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 275360ce86c7SWei Liu f_namelen = stbuf->f_namelen; 275460ce86c7SWei Liu 275560ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 275660ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 275760ce86c7SWei Liu f_bavail, f_files, f_ffree, 275860ce86c7SWei Liu fsid_val, f_namelen); 275960ce86c7SWei Liu } 276060ce86c7SWei Liu 276160ce86c7SWei Liu static void v9fs_statfs(void *opaque) 276260ce86c7SWei Liu { 276360ce86c7SWei Liu int32_t fid; 276460ce86c7SWei Liu ssize_t retval = 0; 276560ce86c7SWei Liu size_t offset = 7; 276660ce86c7SWei Liu V9fsFidState *fidp; 276760ce86c7SWei Liu struct statfs stbuf; 276860ce86c7SWei Liu V9fsPDU *pdu = opaque; 276960ce86c7SWei Liu V9fsState *s = pdu->s; 277060ce86c7SWei Liu 277160ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 277260ce86c7SWei Liu if (retval < 0) { 277360ce86c7SWei Liu goto out_nofid; 277460ce86c7SWei Liu } 277560ce86c7SWei Liu fidp = get_fid(pdu, fid); 277660ce86c7SWei Liu if (fidp == NULL) { 277760ce86c7SWei Liu retval = -ENOENT; 277860ce86c7SWei Liu goto out_nofid; 277960ce86c7SWei Liu } 278060ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 278160ce86c7SWei Liu if (retval < 0) { 278260ce86c7SWei Liu goto out; 278360ce86c7SWei Liu } 278460ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 278560ce86c7SWei Liu if (retval < 0) { 278660ce86c7SWei Liu goto out; 278760ce86c7SWei Liu } 278860ce86c7SWei Liu retval += offset; 278960ce86c7SWei Liu out: 279060ce86c7SWei Liu put_fid(pdu, fidp); 279160ce86c7SWei Liu out_nofid: 279260ce86c7SWei Liu pdu_complete(pdu, retval); 279360ce86c7SWei Liu } 279460ce86c7SWei Liu 279560ce86c7SWei Liu static void v9fs_mknod(void *opaque) 279660ce86c7SWei Liu { 279760ce86c7SWei Liu 279860ce86c7SWei Liu int mode; 279960ce86c7SWei Liu gid_t gid; 280060ce86c7SWei Liu int32_t fid; 280160ce86c7SWei Liu V9fsQID qid; 280260ce86c7SWei Liu int err = 0; 280360ce86c7SWei Liu int major, minor; 280460ce86c7SWei Liu size_t offset = 7; 280560ce86c7SWei Liu V9fsString name; 280660ce86c7SWei Liu struct stat stbuf; 280760ce86c7SWei Liu V9fsFidState *fidp; 280860ce86c7SWei Liu V9fsPDU *pdu = opaque; 280960ce86c7SWei Liu 281060ce86c7SWei Liu v9fs_string_init(&name); 281160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 281260ce86c7SWei Liu &major, &minor, &gid); 281360ce86c7SWei Liu if (err < 0) { 281460ce86c7SWei Liu goto out_nofid; 281560ce86c7SWei Liu } 281660ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 281760ce86c7SWei Liu 281860ce86c7SWei Liu fidp = get_fid(pdu, fid); 281960ce86c7SWei Liu if (fidp == NULL) { 282060ce86c7SWei Liu err = -ENOENT; 282160ce86c7SWei Liu goto out_nofid; 282260ce86c7SWei Liu } 282360ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 282460ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 282560ce86c7SWei Liu if (err < 0) { 282660ce86c7SWei Liu goto out; 282760ce86c7SWei Liu } 282860ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 282960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 283060ce86c7SWei Liu if (err < 0) { 283160ce86c7SWei Liu goto out; 283260ce86c7SWei Liu } 283360ce86c7SWei Liu err += offset; 283460ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 283560ce86c7SWei Liu qid.type, qid.version, qid.path); 283660ce86c7SWei Liu out: 283760ce86c7SWei Liu put_fid(pdu, fidp); 283860ce86c7SWei Liu out_nofid: 283960ce86c7SWei Liu pdu_complete(pdu, err); 284060ce86c7SWei Liu v9fs_string_free(&name); 284160ce86c7SWei Liu } 284260ce86c7SWei Liu 284360ce86c7SWei Liu /* 284460ce86c7SWei Liu * Implement posix byte range locking code 284560ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 284660ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 284760ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 284860ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 284960ce86c7SWei Liu * So when a TLOCK request comes, always return success 285060ce86c7SWei Liu */ 285160ce86c7SWei Liu static void v9fs_lock(void *opaque) 285260ce86c7SWei Liu { 285360ce86c7SWei Liu int8_t status; 285460ce86c7SWei Liu V9fsFlock flock; 285560ce86c7SWei Liu size_t offset = 7; 285660ce86c7SWei Liu struct stat stbuf; 285760ce86c7SWei Liu V9fsFidState *fidp; 285860ce86c7SWei Liu int32_t fid, err = 0; 285960ce86c7SWei Liu V9fsPDU *pdu = opaque; 286060ce86c7SWei Liu 286160ce86c7SWei Liu status = P9_LOCK_ERROR; 286260ce86c7SWei Liu v9fs_string_init(&flock.client_id); 286360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 286460ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 286560ce86c7SWei Liu &flock.proc_id, &flock.client_id); 286660ce86c7SWei Liu if (err < 0) { 286760ce86c7SWei Liu goto out_nofid; 286860ce86c7SWei Liu } 286960ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 287060ce86c7SWei Liu flock.type, flock.start, flock.length); 287160ce86c7SWei Liu 287260ce86c7SWei Liu 287360ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 287460ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 287560ce86c7SWei Liu err = -EINVAL; 287660ce86c7SWei Liu goto out_nofid; 287760ce86c7SWei Liu } 287860ce86c7SWei Liu fidp = get_fid(pdu, fid); 287960ce86c7SWei Liu if (fidp == NULL) { 288060ce86c7SWei Liu err = -ENOENT; 288160ce86c7SWei Liu goto out_nofid; 288260ce86c7SWei Liu } 288360ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 288460ce86c7SWei Liu if (err < 0) { 288560ce86c7SWei Liu goto out; 288660ce86c7SWei Liu } 288760ce86c7SWei Liu status = P9_LOCK_SUCCESS; 288860ce86c7SWei Liu out: 288960ce86c7SWei Liu put_fid(pdu, fidp); 289060ce86c7SWei Liu out_nofid: 289160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "b", status); 289260ce86c7SWei Liu if (err > 0) { 289360ce86c7SWei Liu err += offset; 289460ce86c7SWei Liu } 289560ce86c7SWei Liu trace_v9fs_lock_return(pdu->tag, pdu->id, status); 289660ce86c7SWei Liu pdu_complete(pdu, err); 289760ce86c7SWei Liu v9fs_string_free(&flock.client_id); 289860ce86c7SWei Liu } 289960ce86c7SWei Liu 290060ce86c7SWei Liu /* 290160ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 290260ce86c7SWei Liu * handling is done by client's VFS layer. 290360ce86c7SWei Liu */ 290460ce86c7SWei Liu static void v9fs_getlock(void *opaque) 290560ce86c7SWei Liu { 290660ce86c7SWei Liu size_t offset = 7; 290760ce86c7SWei Liu struct stat stbuf; 290860ce86c7SWei Liu V9fsFidState *fidp; 290960ce86c7SWei Liu V9fsGetlock glock; 291060ce86c7SWei Liu int32_t fid, err = 0; 291160ce86c7SWei Liu V9fsPDU *pdu = opaque; 291260ce86c7SWei Liu 291360ce86c7SWei Liu v9fs_string_init(&glock.client_id); 291460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 291560ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 291660ce86c7SWei Liu &glock.client_id); 291760ce86c7SWei Liu if (err < 0) { 291860ce86c7SWei Liu goto out_nofid; 291960ce86c7SWei Liu } 292060ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 292160ce86c7SWei Liu glock.type, glock.start, glock.length); 292260ce86c7SWei Liu 292360ce86c7SWei Liu fidp = get_fid(pdu, fid); 292460ce86c7SWei Liu if (fidp == NULL) { 292560ce86c7SWei Liu err = -ENOENT; 292660ce86c7SWei Liu goto out_nofid; 292760ce86c7SWei Liu } 292860ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 292960ce86c7SWei Liu if (err < 0) { 293060ce86c7SWei Liu goto out; 293160ce86c7SWei Liu } 293260ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 293360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 293460ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 293560ce86c7SWei Liu &glock.client_id); 293660ce86c7SWei Liu if (err < 0) { 293760ce86c7SWei Liu goto out; 293860ce86c7SWei Liu } 293960ce86c7SWei Liu err += offset; 294060ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 294160ce86c7SWei Liu glock.length, glock.proc_id); 294260ce86c7SWei Liu out: 294360ce86c7SWei Liu put_fid(pdu, fidp); 294460ce86c7SWei Liu out_nofid: 294560ce86c7SWei Liu pdu_complete(pdu, err); 294660ce86c7SWei Liu v9fs_string_free(&glock.client_id); 294760ce86c7SWei Liu } 294860ce86c7SWei Liu 294960ce86c7SWei Liu static void v9fs_mkdir(void *opaque) 295060ce86c7SWei Liu { 295160ce86c7SWei Liu V9fsPDU *pdu = opaque; 295260ce86c7SWei Liu size_t offset = 7; 295360ce86c7SWei Liu int32_t fid; 295460ce86c7SWei Liu struct stat stbuf; 295560ce86c7SWei Liu V9fsQID qid; 295660ce86c7SWei Liu V9fsString name; 295760ce86c7SWei Liu V9fsFidState *fidp; 295860ce86c7SWei Liu gid_t gid; 295960ce86c7SWei Liu int mode; 296060ce86c7SWei Liu int err = 0; 296160ce86c7SWei Liu 296260ce86c7SWei Liu v9fs_string_init(&name); 296360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 296460ce86c7SWei Liu if (err < 0) { 296560ce86c7SWei Liu goto out_nofid; 296660ce86c7SWei Liu } 296760ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 296860ce86c7SWei Liu 296960ce86c7SWei Liu fidp = get_fid(pdu, fid); 297060ce86c7SWei Liu if (fidp == NULL) { 297160ce86c7SWei Liu err = -ENOENT; 297260ce86c7SWei Liu goto out_nofid; 297360ce86c7SWei Liu } 297460ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 297560ce86c7SWei Liu if (err < 0) { 297660ce86c7SWei Liu goto out; 297760ce86c7SWei Liu } 297860ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 297960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 298060ce86c7SWei Liu if (err < 0) { 298160ce86c7SWei Liu goto out; 298260ce86c7SWei Liu } 298360ce86c7SWei Liu err += offset; 298460ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 298560ce86c7SWei Liu qid.type, qid.version, qid.path, err); 298660ce86c7SWei Liu out: 298760ce86c7SWei Liu put_fid(pdu, fidp); 298860ce86c7SWei Liu out_nofid: 298960ce86c7SWei Liu pdu_complete(pdu, err); 299060ce86c7SWei Liu v9fs_string_free(&name); 299160ce86c7SWei Liu } 299260ce86c7SWei Liu 299360ce86c7SWei Liu static void v9fs_xattrwalk(void *opaque) 299460ce86c7SWei Liu { 299560ce86c7SWei Liu int64_t size; 299660ce86c7SWei Liu V9fsString name; 299760ce86c7SWei Liu ssize_t err = 0; 299860ce86c7SWei Liu size_t offset = 7; 299960ce86c7SWei Liu int32_t fid, newfid; 300060ce86c7SWei Liu V9fsFidState *file_fidp; 300160ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 300260ce86c7SWei Liu V9fsPDU *pdu = opaque; 300360ce86c7SWei Liu V9fsState *s = pdu->s; 300460ce86c7SWei Liu 300560ce86c7SWei Liu v9fs_string_init(&name); 300660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 300760ce86c7SWei Liu if (err < 0) { 300860ce86c7SWei Liu goto out_nofid; 300960ce86c7SWei Liu } 301060ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 301160ce86c7SWei Liu 301260ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 301360ce86c7SWei Liu if (file_fidp == NULL) { 301460ce86c7SWei Liu err = -ENOENT; 301560ce86c7SWei Liu goto out_nofid; 301660ce86c7SWei Liu } 301760ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 301860ce86c7SWei Liu if (xattr_fidp == NULL) { 301960ce86c7SWei Liu err = -EINVAL; 302060ce86c7SWei Liu goto out; 302160ce86c7SWei Liu } 302260ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 302360ce86c7SWei Liu if (name.data == NULL) { 302460ce86c7SWei Liu /* 302560ce86c7SWei Liu * listxattr request. Get the size first 302660ce86c7SWei Liu */ 302760ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 302860ce86c7SWei Liu if (size < 0) { 302960ce86c7SWei Liu err = size; 303060ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 303160ce86c7SWei Liu goto out; 303260ce86c7SWei Liu } 303360ce86c7SWei Liu /* 303460ce86c7SWei Liu * Read the xattr value 303560ce86c7SWei Liu */ 303660ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 303760ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 303860ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = -1; 303960ce86c7SWei Liu if (size) { 304060ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 304160ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 304260ce86c7SWei Liu xattr_fidp->fs.xattr.value, 304360ce86c7SWei Liu xattr_fidp->fs.xattr.len); 304460ce86c7SWei Liu if (err < 0) { 304560ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 304660ce86c7SWei Liu goto out; 304760ce86c7SWei Liu } 304860ce86c7SWei Liu } 304960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 305060ce86c7SWei Liu if (err < 0) { 305160ce86c7SWei Liu goto out; 305260ce86c7SWei Liu } 305360ce86c7SWei Liu err += offset; 305460ce86c7SWei Liu } else { 305560ce86c7SWei Liu /* 305660ce86c7SWei Liu * specific xattr fid. We check for xattr 305760ce86c7SWei Liu * presence also collect the xattr size 305860ce86c7SWei Liu */ 305960ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 306060ce86c7SWei Liu &name, NULL, 0); 306160ce86c7SWei Liu if (size < 0) { 306260ce86c7SWei Liu err = size; 306360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 306460ce86c7SWei Liu goto out; 306560ce86c7SWei Liu } 306660ce86c7SWei Liu /* 306760ce86c7SWei Liu * Read the xattr value 306860ce86c7SWei Liu */ 306960ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 307060ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 307160ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = -1; 307260ce86c7SWei Liu if (size) { 307360ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 307460ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 307560ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 307660ce86c7SWei Liu xattr_fidp->fs.xattr.len); 307760ce86c7SWei Liu if (err < 0) { 307860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 307960ce86c7SWei Liu goto out; 308060ce86c7SWei Liu } 308160ce86c7SWei Liu } 308260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 308360ce86c7SWei Liu if (err < 0) { 308460ce86c7SWei Liu goto out; 308560ce86c7SWei Liu } 308660ce86c7SWei Liu err += offset; 308760ce86c7SWei Liu } 308860ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 308960ce86c7SWei Liu out: 309060ce86c7SWei Liu put_fid(pdu, file_fidp); 309160ce86c7SWei Liu if (xattr_fidp) { 309260ce86c7SWei Liu put_fid(pdu, xattr_fidp); 309360ce86c7SWei Liu } 309460ce86c7SWei Liu out_nofid: 309560ce86c7SWei Liu pdu_complete(pdu, err); 309660ce86c7SWei Liu v9fs_string_free(&name); 309760ce86c7SWei Liu } 309860ce86c7SWei Liu 309960ce86c7SWei Liu static void v9fs_xattrcreate(void *opaque) 310060ce86c7SWei Liu { 310160ce86c7SWei Liu int flags; 310260ce86c7SWei Liu int32_t fid; 310360ce86c7SWei Liu int64_t size; 310460ce86c7SWei Liu ssize_t err = 0; 310560ce86c7SWei Liu V9fsString name; 310660ce86c7SWei Liu size_t offset = 7; 310760ce86c7SWei Liu V9fsFidState *file_fidp; 310860ce86c7SWei Liu V9fsFidState *xattr_fidp; 310960ce86c7SWei Liu V9fsPDU *pdu = opaque; 311060ce86c7SWei Liu 311160ce86c7SWei Liu v9fs_string_init(&name); 311260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 311360ce86c7SWei Liu if (err < 0) { 311460ce86c7SWei Liu goto out_nofid; 311560ce86c7SWei Liu } 311660ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 311760ce86c7SWei Liu 311860ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 311960ce86c7SWei Liu if (file_fidp == NULL) { 312060ce86c7SWei Liu err = -EINVAL; 312160ce86c7SWei Liu goto out_nofid; 312260ce86c7SWei Liu } 312360ce86c7SWei Liu /* Make the file fid point to xattr */ 312460ce86c7SWei Liu xattr_fidp = file_fidp; 312560ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 312660ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 312760ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 312860ce86c7SWei Liu xattr_fidp->fs.xattr.flags = flags; 312960ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 313060ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 313160ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 313260ce86c7SWei Liu err = offset; 313360ce86c7SWei Liu put_fid(pdu, file_fidp); 313460ce86c7SWei Liu out_nofid: 313560ce86c7SWei Liu pdu_complete(pdu, err); 313660ce86c7SWei Liu v9fs_string_free(&name); 313760ce86c7SWei Liu } 313860ce86c7SWei Liu 313960ce86c7SWei Liu static void v9fs_readlink(void *opaque) 314060ce86c7SWei Liu { 314160ce86c7SWei Liu V9fsPDU *pdu = opaque; 314260ce86c7SWei Liu size_t offset = 7; 314360ce86c7SWei Liu V9fsString target; 314460ce86c7SWei Liu int32_t fid; 314560ce86c7SWei Liu int err = 0; 314660ce86c7SWei Liu V9fsFidState *fidp; 314760ce86c7SWei Liu 314860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 314960ce86c7SWei Liu if (err < 0) { 315060ce86c7SWei Liu goto out_nofid; 315160ce86c7SWei Liu } 315260ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 315360ce86c7SWei Liu fidp = get_fid(pdu, fid); 315460ce86c7SWei Liu if (fidp == NULL) { 315560ce86c7SWei Liu err = -ENOENT; 315660ce86c7SWei Liu goto out_nofid; 315760ce86c7SWei Liu } 315860ce86c7SWei Liu 315960ce86c7SWei Liu v9fs_string_init(&target); 316060ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 316160ce86c7SWei Liu if (err < 0) { 316260ce86c7SWei Liu goto out; 316360ce86c7SWei Liu } 316460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 316560ce86c7SWei Liu if (err < 0) { 316660ce86c7SWei Liu v9fs_string_free(&target); 316760ce86c7SWei Liu goto out; 316860ce86c7SWei Liu } 316960ce86c7SWei Liu err += offset; 317060ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 317160ce86c7SWei Liu v9fs_string_free(&target); 317260ce86c7SWei Liu out: 317360ce86c7SWei Liu put_fid(pdu, fidp); 317460ce86c7SWei Liu out_nofid: 317560ce86c7SWei Liu pdu_complete(pdu, err); 317660ce86c7SWei Liu } 317760ce86c7SWei Liu 317860ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 317960ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 318060ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 318160ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 318260ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 318360ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 318460ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 318560ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 318660ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 318760ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 318860ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 318960ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 319060ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 319160ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 319260ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 319360ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 319460ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 319560ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 319660ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 319760ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 319860ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 319960ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 320060ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 320160ce86c7SWei Liu [P9_TREAD] = v9fs_read, 320260ce86c7SWei Liu #if 0 320360ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 320460ce86c7SWei Liu #endif 320560ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 320660ce86c7SWei Liu [P9_TLINK] = v9fs_link, 320760ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 320860ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 320960ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 321060ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 321160ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 321260ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 321360ce86c7SWei Liu }; 321460ce86c7SWei Liu 321560ce86c7SWei Liu static void v9fs_op_not_supp(void *opaque) 321660ce86c7SWei Liu { 321760ce86c7SWei Liu V9fsPDU *pdu = opaque; 321860ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 321960ce86c7SWei Liu } 322060ce86c7SWei Liu 322160ce86c7SWei Liu static void v9fs_fs_ro(void *opaque) 322260ce86c7SWei Liu { 322360ce86c7SWei Liu V9fsPDU *pdu = opaque; 322460ce86c7SWei Liu pdu_complete(pdu, -EROFS); 322560ce86c7SWei Liu } 322660ce86c7SWei Liu 322760ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 322860ce86c7SWei Liu { 322960ce86c7SWei Liu switch (pdu->id) { 323060ce86c7SWei Liu case P9_TREADDIR: 323160ce86c7SWei Liu case P9_TSTATFS: 323260ce86c7SWei Liu case P9_TGETATTR: 323360ce86c7SWei Liu case P9_TXATTRWALK: 323460ce86c7SWei Liu case P9_TLOCK: 323560ce86c7SWei Liu case P9_TGETLOCK: 323660ce86c7SWei Liu case P9_TREADLINK: 323760ce86c7SWei Liu case P9_TVERSION: 323860ce86c7SWei Liu case P9_TLOPEN: 323960ce86c7SWei Liu case P9_TATTACH: 324060ce86c7SWei Liu case P9_TSTAT: 324160ce86c7SWei Liu case P9_TWALK: 324260ce86c7SWei Liu case P9_TCLUNK: 324360ce86c7SWei Liu case P9_TFSYNC: 324460ce86c7SWei Liu case P9_TOPEN: 324560ce86c7SWei Liu case P9_TREAD: 324660ce86c7SWei Liu case P9_TAUTH: 324760ce86c7SWei Liu case P9_TFLUSH: 324860ce86c7SWei Liu return 1; 324960ce86c7SWei Liu default: 325060ce86c7SWei Liu return 0; 325160ce86c7SWei Liu } 325260ce86c7SWei Liu } 325360ce86c7SWei Liu 325460ce86c7SWei Liu void pdu_submit(V9fsPDU *pdu) 325560ce86c7SWei Liu { 325660ce86c7SWei Liu Coroutine *co; 325760ce86c7SWei Liu CoroutineEntry *handler; 325860ce86c7SWei Liu V9fsState *s = pdu->s; 325960ce86c7SWei Liu 326060ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 326160ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 326260ce86c7SWei Liu handler = v9fs_op_not_supp; 326360ce86c7SWei Liu } else { 326460ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 326560ce86c7SWei Liu } 326660ce86c7SWei Liu 326760ce86c7SWei Liu if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 326860ce86c7SWei Liu handler = v9fs_fs_ro; 326960ce86c7SWei Liu } 327060ce86c7SWei Liu co = qemu_coroutine_create(handler); 327160ce86c7SWei Liu qemu_coroutine_enter(co, pdu); 327260ce86c7SWei Liu } 327360ce86c7SWei Liu 32742a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 32752a0c56aaSWei Liu int v9fs_device_realize_common(V9fsState *s, Error **errp) 32762a0c56aaSWei Liu { 327700588a0aSWei Liu V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); 32782a0c56aaSWei Liu int i, len; 32792a0c56aaSWei Liu struct stat stat; 32802a0c56aaSWei Liu FsDriverEntry *fse; 32812a0c56aaSWei Liu V9fsPath path; 32822a0c56aaSWei Liu int rc = 1; 32832a0c56aaSWei Liu 32842a0c56aaSWei Liu /* initialize pdu allocator */ 32852a0c56aaSWei Liu QLIST_INIT(&s->free_list); 32862a0c56aaSWei Liu QLIST_INIT(&s->active_list); 32872a0c56aaSWei Liu for (i = 0; i < (MAX_REQ - 1); i++) { 328800588a0aSWei Liu QLIST_INSERT_HEAD(&s->free_list, &v->pdus[i], next); 328900588a0aSWei Liu v->pdus[i].s = s; 329000588a0aSWei Liu v->pdus[i].idx = i; 32912a0c56aaSWei Liu } 32922a0c56aaSWei Liu 32932a0c56aaSWei Liu v9fs_path_init(&path); 32942a0c56aaSWei Liu 32952a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 32962a0c56aaSWei Liu 32972a0c56aaSWei Liu if (!fse) { 32982a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 32992a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 33002a0c56aaSWei Liu "id = %s", 33012a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 33022a0c56aaSWei Liu goto out; 33032a0c56aaSWei Liu } 33042a0c56aaSWei Liu 33052a0c56aaSWei Liu if (!s->fsconf.tag) { 33062a0c56aaSWei Liu /* we haven't specified a mount_tag */ 33072a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 33082a0c56aaSWei Liu s->fsconf.fsdev_id); 33092a0c56aaSWei Liu goto out; 33102a0c56aaSWei Liu } 33112a0c56aaSWei Liu 33122a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 33132a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 33142a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 33152a0c56aaSWei Liu len = strlen(s->fsconf.tag); 33162a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 33172a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 33182a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 33192a0c56aaSWei Liu goto out; 33202a0c56aaSWei Liu } 33212a0c56aaSWei Liu 33222a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 33232a0c56aaSWei Liu s->ctx.uid = -1; 33242a0c56aaSWei Liu 33252a0c56aaSWei Liu s->ops = fse->ops; 33262a0c56aaSWei Liu 33272a0c56aaSWei Liu s->fid_list = NULL; 33282a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 33292a0c56aaSWei Liu 33302a0c56aaSWei Liu if (s->ops->init(&s->ctx) < 0) { 33312a0c56aaSWei Liu error_setg(errp, "9pfs Failed to initialize fs-driver with id:%s" 33322a0c56aaSWei Liu " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); 33332a0c56aaSWei Liu goto out; 33342a0c56aaSWei Liu } 33352a0c56aaSWei Liu 33362a0c56aaSWei Liu /* 33372a0c56aaSWei Liu * Check details of export path, We need to use fs driver 33382a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 33392a0c56aaSWei Liu * use co-routines here. 33402a0c56aaSWei Liu */ 33412a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 33422a0c56aaSWei Liu error_setg(errp, 33432a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 33442a0c56aaSWei Liu goto out; 33452a0c56aaSWei Liu } 33462a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 33472a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 33482a0c56aaSWei Liu goto out; 33492a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 33502a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 33512a0c56aaSWei Liu goto out; 33522a0c56aaSWei Liu } 33532a0c56aaSWei Liu v9fs_path_free(&path); 33542a0c56aaSWei Liu 33552a0c56aaSWei Liu rc = 0; 33562a0c56aaSWei Liu out: 33572a0c56aaSWei Liu if (rc) { 33582a0c56aaSWei Liu g_free(s->ctx.fs_root); 33592a0c56aaSWei Liu g_free(s->tag); 33602a0c56aaSWei Liu v9fs_path_free(&path); 33612a0c56aaSWei Liu } 33622a0c56aaSWei Liu return rc; 33632a0c56aaSWei Liu } 33642a0c56aaSWei Liu 33652a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 33662a0c56aaSWei Liu { 33672a0c56aaSWei Liu g_free(s->ctx.fs_root); 33682a0c56aaSWei Liu g_free(s->tag); 33692a0c56aaSWei Liu } 33702a0c56aaSWei Liu 337160ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 337260ce86c7SWei Liu { 337360ce86c7SWei Liu struct rlimit rlim; 337460ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 337563325b18SGreg Kurz error_report("Failed to get the resource limit"); 337660ce86c7SWei Liu exit(1); 337760ce86c7SWei Liu } 337860ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 337960ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 338060ce86c7SWei Liu } 3381