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" 15e3e83f2eSGreg Kurz #include <glib/gprintf.h> 1660ce86c7SWei Liu #include "hw/virtio/virtio.h" 17da34e65cSMarkus 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); 50ea83441cSStefano Stabellini ret = pdu->s->transport->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); 62ea83441cSStefano Stabellini ret = pdu->s->transport->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 { 70ea83441cSStefano Stabellini pdu->s->transport->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 183e3e83f2eSGreg Kurz 184e3e83f2eSGreg Kurz void GCC_FMT_ATTR(2, 3) 185e3e83f2eSGreg Kurz v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) 186e3e83f2eSGreg Kurz { 187e3e83f2eSGreg Kurz va_list ap; 188e3e83f2eSGreg Kurz 189e3e83f2eSGreg Kurz v9fs_path_free(path); 190e3e83f2eSGreg Kurz 191e3e83f2eSGreg Kurz va_start(ap, fmt); 192e3e83f2eSGreg Kurz /* Bump the size for including terminating NULL */ 193e3e83f2eSGreg Kurz path->size = g_vasprintf(&path->data, fmt, ap) + 1; 194e3e83f2eSGreg Kurz va_end(ap); 195e3e83f2eSGreg Kurz } 196e3e83f2eSGreg Kurz 19760ce86c7SWei Liu void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs) 19860ce86c7SWei Liu { 19960ce86c7SWei Liu v9fs_path_free(lhs); 20060ce86c7SWei Liu lhs->data = g_malloc(rhs->size); 20160ce86c7SWei Liu memcpy(lhs->data, rhs->data, rhs->size); 20260ce86c7SWei Liu lhs->size = rhs->size; 20360ce86c7SWei Liu } 20460ce86c7SWei Liu 20560ce86c7SWei Liu int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 20660ce86c7SWei Liu const char *name, V9fsPath *path) 20760ce86c7SWei Liu { 20860ce86c7SWei Liu int err; 20960ce86c7SWei Liu err = s->ops->name_to_path(&s->ctx, dirpath, name, path); 21060ce86c7SWei Liu if (err < 0) { 21160ce86c7SWei Liu err = -errno; 21260ce86c7SWei Liu } 21360ce86c7SWei Liu return err; 21460ce86c7SWei Liu } 21560ce86c7SWei Liu 21660ce86c7SWei Liu /* 21760ce86c7SWei Liu * Return TRUE if s1 is an ancestor of s2. 21860ce86c7SWei Liu * 21960ce86c7SWei Liu * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". 22060ce86c7SWei Liu * As a special case, We treat s1 as ancestor of s2 if they are same! 22160ce86c7SWei Liu */ 22260ce86c7SWei Liu static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) 22360ce86c7SWei Liu { 22460ce86c7SWei Liu if (!strncmp(s1->data, s2->data, s1->size - 1)) { 22560ce86c7SWei Liu if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { 22660ce86c7SWei Liu return 1; 22760ce86c7SWei Liu } 22860ce86c7SWei Liu } 22960ce86c7SWei Liu return 0; 23060ce86c7SWei Liu } 23160ce86c7SWei Liu 23260ce86c7SWei Liu static size_t v9fs_string_size(V9fsString *str) 23360ce86c7SWei Liu { 23460ce86c7SWei Liu return str->size; 23560ce86c7SWei Liu } 23660ce86c7SWei Liu 23760ce86c7SWei Liu /* 23860ce86c7SWei Liu * returns 0 if fid got re-opened, 1 if not, < 0 on error */ 2398440e22eSGreg Kurz static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) 24060ce86c7SWei Liu { 24160ce86c7SWei Liu int err = 1; 24260ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 24360ce86c7SWei Liu if (f->fs.fd == -1) { 24460ce86c7SWei Liu do { 24560ce86c7SWei Liu err = v9fs_co_open(pdu, f, f->open_flags); 24660ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 24760ce86c7SWei Liu } 24860ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 249f314ea4eSGreg Kurz if (f->fs.dir.stream == NULL) { 25060ce86c7SWei Liu do { 25160ce86c7SWei Liu err = v9fs_co_opendir(pdu, f); 25260ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 25360ce86c7SWei Liu } 25460ce86c7SWei Liu } 25560ce86c7SWei Liu return err; 25660ce86c7SWei Liu } 25760ce86c7SWei Liu 2588440e22eSGreg Kurz static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) 25960ce86c7SWei Liu { 26060ce86c7SWei Liu int err; 26160ce86c7SWei Liu V9fsFidState *f; 26260ce86c7SWei Liu V9fsState *s = pdu->s; 26360ce86c7SWei Liu 26460ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 26560ce86c7SWei Liu BUG_ON(f->clunked); 26660ce86c7SWei Liu if (f->fid == fid) { 26760ce86c7SWei Liu /* 26860ce86c7SWei Liu * Update the fid ref upfront so that 26960ce86c7SWei Liu * we don't get reclaimed when we yield 27060ce86c7SWei Liu * in open later. 27160ce86c7SWei Liu */ 27260ce86c7SWei Liu f->ref++; 27360ce86c7SWei Liu /* 27460ce86c7SWei Liu * check whether we need to reopen the 27560ce86c7SWei Liu * file. We might have closed the fd 27660ce86c7SWei Liu * while trying to free up some file 27760ce86c7SWei Liu * descriptors. 27860ce86c7SWei Liu */ 27960ce86c7SWei Liu err = v9fs_reopen_fid(pdu, f); 28060ce86c7SWei Liu if (err < 0) { 28160ce86c7SWei Liu f->ref--; 28260ce86c7SWei Liu return NULL; 28360ce86c7SWei Liu } 28460ce86c7SWei Liu /* 28560ce86c7SWei Liu * Mark the fid as referenced so that the LRU 28660ce86c7SWei Liu * reclaim won't close the file descriptor 28760ce86c7SWei Liu */ 28860ce86c7SWei Liu f->flags |= FID_REFERENCED; 28960ce86c7SWei Liu return f; 29060ce86c7SWei Liu } 29160ce86c7SWei Liu } 29260ce86c7SWei Liu return NULL; 29360ce86c7SWei Liu } 29460ce86c7SWei Liu 29560ce86c7SWei Liu static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) 29660ce86c7SWei Liu { 29760ce86c7SWei Liu V9fsFidState *f; 29860ce86c7SWei Liu 29960ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 30060ce86c7SWei Liu /* If fid is already there return NULL */ 30160ce86c7SWei Liu BUG_ON(f->clunked); 30260ce86c7SWei Liu if (f->fid == fid) { 30360ce86c7SWei Liu return NULL; 30460ce86c7SWei Liu } 30560ce86c7SWei Liu } 30660ce86c7SWei Liu f = g_malloc0(sizeof(V9fsFidState)); 30760ce86c7SWei Liu f->fid = fid; 30860ce86c7SWei Liu f->fid_type = P9_FID_NONE; 30960ce86c7SWei Liu f->ref = 1; 31060ce86c7SWei Liu /* 31160ce86c7SWei Liu * Mark the fid as referenced so that the LRU 31260ce86c7SWei Liu * reclaim won't close the file descriptor 31360ce86c7SWei Liu */ 31460ce86c7SWei Liu f->flags |= FID_REFERENCED; 31560ce86c7SWei Liu f->next = s->fid_list; 31660ce86c7SWei Liu s->fid_list = f; 31760ce86c7SWei Liu 3187cde47d4SGreg Kurz v9fs_readdir_init(&f->fs.dir); 3197cde47d4SGreg Kurz v9fs_readdir_init(&f->fs_reclaim.dir); 3207cde47d4SGreg Kurz 32160ce86c7SWei Liu return f; 32260ce86c7SWei Liu } 32360ce86c7SWei Liu 3248440e22eSGreg Kurz static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) 32560ce86c7SWei Liu { 32660ce86c7SWei Liu int retval = 0; 32760ce86c7SWei Liu 328dd28fbbcSLi Qiang if (fidp->fs.xattr.xattrwalk_fid) { 32960ce86c7SWei Liu /* getxattr/listxattr fid */ 33060ce86c7SWei Liu goto free_value; 33160ce86c7SWei Liu } 33260ce86c7SWei Liu /* 33360ce86c7SWei Liu * if this is fid for setxattr. clunk should 33460ce86c7SWei Liu * result in setxattr localcall 33560ce86c7SWei Liu */ 33660ce86c7SWei Liu if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { 33760ce86c7SWei Liu /* clunk after partial write */ 33860ce86c7SWei Liu retval = -EINVAL; 33960ce86c7SWei Liu goto free_out; 34060ce86c7SWei Liu } 34160ce86c7SWei Liu if (fidp->fs.xattr.len) { 34260ce86c7SWei Liu retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, 34360ce86c7SWei Liu fidp->fs.xattr.value, 34460ce86c7SWei Liu fidp->fs.xattr.len, 34560ce86c7SWei Liu fidp->fs.xattr.flags); 34660ce86c7SWei Liu } else { 34760ce86c7SWei Liu retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); 34860ce86c7SWei Liu } 34960ce86c7SWei Liu free_out: 35060ce86c7SWei Liu v9fs_string_free(&fidp->fs.xattr.name); 35160ce86c7SWei Liu free_value: 35260ce86c7SWei Liu g_free(fidp->fs.xattr.value); 35360ce86c7SWei Liu return retval; 35460ce86c7SWei Liu } 35560ce86c7SWei Liu 3568440e22eSGreg Kurz static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) 35760ce86c7SWei Liu { 35860ce86c7SWei Liu int retval = 0; 35960ce86c7SWei Liu 36060ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 36160ce86c7SWei Liu /* If we reclaimed the fd no need to close */ 36260ce86c7SWei Liu if (fidp->fs.fd != -1) { 36360ce86c7SWei Liu retval = v9fs_co_close(pdu, &fidp->fs); 36460ce86c7SWei Liu } 36560ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_DIR) { 366f314ea4eSGreg Kurz if (fidp->fs.dir.stream != NULL) { 36760ce86c7SWei Liu retval = v9fs_co_closedir(pdu, &fidp->fs); 36860ce86c7SWei Liu } 36960ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 37060ce86c7SWei Liu retval = v9fs_xattr_fid_clunk(pdu, fidp); 37160ce86c7SWei Liu } 37260ce86c7SWei Liu v9fs_path_free(&fidp->path); 37360ce86c7SWei Liu g_free(fidp); 37460ce86c7SWei Liu return retval; 37560ce86c7SWei Liu } 37660ce86c7SWei Liu 3778440e22eSGreg Kurz static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) 37860ce86c7SWei Liu { 37960ce86c7SWei Liu BUG_ON(!fidp->ref); 38060ce86c7SWei Liu fidp->ref--; 38160ce86c7SWei Liu /* 38260ce86c7SWei Liu * Don't free the fid if it is in reclaim list 38360ce86c7SWei Liu */ 38460ce86c7SWei Liu if (!fidp->ref && fidp->clunked) { 38560ce86c7SWei Liu if (fidp->fid == pdu->s->root_fid) { 38660ce86c7SWei Liu /* 38760ce86c7SWei Liu * if the clunked fid is root fid then we 38860ce86c7SWei Liu * have unmounted the fs on the client side. 38960ce86c7SWei Liu * delete the migration blocker. Ideally, this 39060ce86c7SWei Liu * should be hooked to transport close notification 39160ce86c7SWei Liu */ 39260ce86c7SWei Liu if (pdu->s->migration_blocker) { 39360ce86c7SWei Liu migrate_del_blocker(pdu->s->migration_blocker); 39460ce86c7SWei Liu error_free(pdu->s->migration_blocker); 39560ce86c7SWei Liu pdu->s->migration_blocker = NULL; 39660ce86c7SWei Liu } 39760ce86c7SWei Liu } 39860ce86c7SWei Liu return free_fid(pdu, fidp); 39960ce86c7SWei Liu } 40060ce86c7SWei Liu return 0; 40160ce86c7SWei Liu } 40260ce86c7SWei Liu 40360ce86c7SWei Liu static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) 40460ce86c7SWei Liu { 40560ce86c7SWei Liu V9fsFidState **fidpp, *fidp; 40660ce86c7SWei Liu 40760ce86c7SWei Liu for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { 40860ce86c7SWei Liu if ((*fidpp)->fid == fid) { 40960ce86c7SWei Liu break; 41060ce86c7SWei Liu } 41160ce86c7SWei Liu } 41260ce86c7SWei Liu if (*fidpp == NULL) { 41360ce86c7SWei Liu return NULL; 41460ce86c7SWei Liu } 41560ce86c7SWei Liu fidp = *fidpp; 41660ce86c7SWei Liu *fidpp = fidp->next; 41760ce86c7SWei Liu fidp->clunked = 1; 41860ce86c7SWei Liu return fidp; 41960ce86c7SWei Liu } 42060ce86c7SWei Liu 4218440e22eSGreg Kurz void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) 42260ce86c7SWei Liu { 42360ce86c7SWei Liu int reclaim_count = 0; 42460ce86c7SWei Liu V9fsState *s = pdu->s; 42560ce86c7SWei Liu V9fsFidState *f, *reclaim_list = NULL; 42660ce86c7SWei Liu 42760ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 42860ce86c7SWei Liu /* 42960ce86c7SWei Liu * Unlink fids cannot be reclaimed. Check 43060ce86c7SWei Liu * for them and skip them. Also skip fids 43160ce86c7SWei Liu * currently being operated on. 43260ce86c7SWei Liu */ 43360ce86c7SWei Liu if (f->ref || f->flags & FID_NON_RECLAIMABLE) { 43460ce86c7SWei Liu continue; 43560ce86c7SWei Liu } 43660ce86c7SWei Liu /* 43760ce86c7SWei Liu * if it is a recently referenced fid 43860ce86c7SWei Liu * we leave the fid untouched and clear the 43960ce86c7SWei Liu * reference bit. We come back to it later 44060ce86c7SWei Liu * in the next iteration. (a simple LRU without 44160ce86c7SWei Liu * moving list elements around) 44260ce86c7SWei Liu */ 44360ce86c7SWei Liu if (f->flags & FID_REFERENCED) { 44460ce86c7SWei Liu f->flags &= ~FID_REFERENCED; 44560ce86c7SWei Liu continue; 44660ce86c7SWei Liu } 44760ce86c7SWei Liu /* 44860ce86c7SWei Liu * Add fids to reclaim list. 44960ce86c7SWei Liu */ 45060ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 45160ce86c7SWei Liu if (f->fs.fd != -1) { 45260ce86c7SWei Liu /* 45360ce86c7SWei Liu * Up the reference count so that 45460ce86c7SWei Liu * a clunk request won't free this fid 45560ce86c7SWei Liu */ 45660ce86c7SWei Liu f->ref++; 45760ce86c7SWei Liu f->rclm_lst = reclaim_list; 45860ce86c7SWei Liu reclaim_list = f; 45960ce86c7SWei Liu f->fs_reclaim.fd = f->fs.fd; 46060ce86c7SWei Liu f->fs.fd = -1; 46160ce86c7SWei Liu reclaim_count++; 46260ce86c7SWei Liu } 46360ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 464f314ea4eSGreg Kurz if (f->fs.dir.stream != NULL) { 46560ce86c7SWei Liu /* 46660ce86c7SWei Liu * Up the reference count so that 46760ce86c7SWei Liu * a clunk request won't free this fid 46860ce86c7SWei Liu */ 46960ce86c7SWei Liu f->ref++; 47060ce86c7SWei Liu f->rclm_lst = reclaim_list; 47160ce86c7SWei Liu reclaim_list = f; 472f314ea4eSGreg Kurz f->fs_reclaim.dir.stream = f->fs.dir.stream; 473f314ea4eSGreg Kurz f->fs.dir.stream = NULL; 47460ce86c7SWei Liu reclaim_count++; 47560ce86c7SWei Liu } 47660ce86c7SWei Liu } 47760ce86c7SWei Liu if (reclaim_count >= open_fd_rc) { 47860ce86c7SWei Liu break; 47960ce86c7SWei Liu } 48060ce86c7SWei Liu } 48160ce86c7SWei Liu /* 48260ce86c7SWei Liu * Now close the fid in reclaim list. Free them if they 48360ce86c7SWei Liu * are already clunked. 48460ce86c7SWei Liu */ 48560ce86c7SWei Liu while (reclaim_list) { 48660ce86c7SWei Liu f = reclaim_list; 48760ce86c7SWei Liu reclaim_list = f->rclm_lst; 48860ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 48960ce86c7SWei Liu v9fs_co_close(pdu, &f->fs_reclaim); 49060ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 49160ce86c7SWei Liu v9fs_co_closedir(pdu, &f->fs_reclaim); 49260ce86c7SWei Liu } 49360ce86c7SWei Liu f->rclm_lst = NULL; 49460ce86c7SWei Liu /* 49560ce86c7SWei Liu * Now drop the fid reference, free it 49660ce86c7SWei Liu * if clunked. 49760ce86c7SWei Liu */ 49860ce86c7SWei Liu put_fid(pdu, f); 49960ce86c7SWei Liu } 50060ce86c7SWei Liu } 50160ce86c7SWei Liu 5028440e22eSGreg Kurz static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) 50360ce86c7SWei Liu { 50460ce86c7SWei Liu int err; 50560ce86c7SWei Liu V9fsState *s = pdu->s; 50660ce86c7SWei Liu V9fsFidState *fidp, head_fid; 50760ce86c7SWei Liu 50860ce86c7SWei Liu head_fid.next = s->fid_list; 50960ce86c7SWei Liu for (fidp = s->fid_list; fidp; fidp = fidp->next) { 51060ce86c7SWei Liu if (fidp->path.size != path->size) { 51160ce86c7SWei Liu continue; 51260ce86c7SWei Liu } 51360ce86c7SWei Liu if (!memcmp(fidp->path.data, path->data, path->size)) { 51460ce86c7SWei Liu /* Mark the fid non reclaimable. */ 51560ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 51660ce86c7SWei Liu 51760ce86c7SWei Liu /* reopen the file/dir if already closed */ 51860ce86c7SWei Liu err = v9fs_reopen_fid(pdu, fidp); 51960ce86c7SWei Liu if (err < 0) { 52060ce86c7SWei Liu return -1; 52160ce86c7SWei Liu } 52260ce86c7SWei Liu /* 52360ce86c7SWei Liu * Go back to head of fid list because 52460ce86c7SWei Liu * the list could have got updated when 52560ce86c7SWei Liu * switched to the worker thread 52660ce86c7SWei Liu */ 52760ce86c7SWei Liu if (err == 0) { 52860ce86c7SWei Liu fidp = &head_fid; 52960ce86c7SWei Liu } 53060ce86c7SWei Liu } 53160ce86c7SWei Liu } 53260ce86c7SWei Liu return 0; 53360ce86c7SWei Liu } 53460ce86c7SWei Liu 5358440e22eSGreg Kurz static void coroutine_fn virtfs_reset(V9fsPDU *pdu) 53660ce86c7SWei Liu { 53760ce86c7SWei Liu V9fsState *s = pdu->s; 53879decce3SGreg Kurz V9fsFidState *fidp; 53960ce86c7SWei Liu 54060ce86c7SWei Liu /* Free all fids */ 54160ce86c7SWei Liu while (s->fid_list) { 54260ce86c7SWei Liu fidp = s->fid_list; 54360ce86c7SWei Liu s->fid_list = fidp->next; 54460ce86c7SWei Liu 54560ce86c7SWei Liu if (fidp->ref) { 54660ce86c7SWei Liu fidp->clunked = 1; 54760ce86c7SWei Liu } else { 54860ce86c7SWei Liu free_fid(pdu, fidp); 54960ce86c7SWei Liu } 55060ce86c7SWei Liu } 55160ce86c7SWei Liu } 55260ce86c7SWei Liu 55360ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 55460ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 55560ce86c7SWei Liu 55660ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 55760ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 55860ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 55960ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 56060ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 56160ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 56260ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 56360ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 56460ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 56560ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 56660ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 56760ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 56860ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 56960ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 57060ce86c7SWei Liu 57160ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 57260ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 57360ce86c7SWei Liu P9_STAT_MODE_LINK | \ 57460ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 57560ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 57660ce86c7SWei Liu P9_STAT_MODE_SOCKET) 57760ce86c7SWei Liu 57860ce86c7SWei Liu /* This is the algorithm from ufs in spfs */ 57960ce86c7SWei Liu static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) 58060ce86c7SWei Liu { 58160ce86c7SWei Liu size_t size; 58260ce86c7SWei Liu 58360ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 58460ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 58560ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 58660ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 58760ce86c7SWei Liu qidp->type = 0; 58860ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 58960ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 59060ce86c7SWei Liu } 59160ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 59260ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 59360ce86c7SWei Liu } 59460ce86c7SWei Liu } 59560ce86c7SWei Liu 5968440e22eSGreg Kurz static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 5978440e22eSGreg Kurz V9fsQID *qidp) 59860ce86c7SWei Liu { 59960ce86c7SWei Liu struct stat stbuf; 60060ce86c7SWei Liu int err; 60160ce86c7SWei Liu 60260ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 60360ce86c7SWei Liu if (err < 0) { 60460ce86c7SWei Liu return err; 60560ce86c7SWei Liu } 60660ce86c7SWei Liu stat_to_qid(&stbuf, qidp); 60760ce86c7SWei Liu return 0; 60860ce86c7SWei Liu } 60960ce86c7SWei Liu 61060ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 61160ce86c7SWei Liu { 61260ce86c7SWei Liu V9fsPDU *pdu = NULL; 61360ce86c7SWei Liu 61460ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 61560ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 61660ce86c7SWei Liu QLIST_REMOVE(pdu, next); 61760ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 61860ce86c7SWei Liu } 61960ce86c7SWei Liu return pdu; 62060ce86c7SWei Liu } 62160ce86c7SWei Liu 62260ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 62360ce86c7SWei Liu { 62460ce86c7SWei Liu V9fsState *s = pdu->s; 625f74e27bfSGreg Kurz 626f74e27bfSGreg Kurz g_assert(!pdu->cancelled); 62760ce86c7SWei Liu QLIST_REMOVE(pdu, next); 62860ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 62960ce86c7SWei Liu } 63060ce86c7SWei Liu 63160ce86c7SWei Liu /* 63260ce86c7SWei Liu * We don't do error checking for pdu_marshal/unmarshal here 63360ce86c7SWei Liu * because we always expect to have enough space to encode 63460ce86c7SWei Liu * error details 63560ce86c7SWei Liu */ 6368440e22eSGreg Kurz static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) 63760ce86c7SWei Liu { 63860ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 63960ce86c7SWei Liu V9fsState *s = pdu->s; 64060ce86c7SWei Liu 64160ce86c7SWei Liu if (len < 0) { 64260ce86c7SWei Liu int err = -len; 64360ce86c7SWei Liu len = 7; 64460ce86c7SWei Liu 64560ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 64660ce86c7SWei Liu V9fsString str; 64760ce86c7SWei Liu 64860ce86c7SWei Liu str.data = strerror(err); 64960ce86c7SWei Liu str.size = strlen(str.data); 65060ce86c7SWei Liu 65160ce86c7SWei Liu len += pdu_marshal(pdu, len, "s", &str); 65260ce86c7SWei Liu id = P9_RERROR; 65360ce86c7SWei Liu } 65460ce86c7SWei Liu 65560ce86c7SWei Liu len += pdu_marshal(pdu, len, "d", err); 65660ce86c7SWei Liu 65760ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 65860ce86c7SWei Liu id = P9_RLERROR; 65960ce86c7SWei Liu } 66060ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 66160ce86c7SWei Liu } 66260ce86c7SWei Liu 66360ce86c7SWei Liu /* fill out the header */ 66460ce86c7SWei Liu pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); 66560ce86c7SWei Liu 66660ce86c7SWei Liu /* keep these in sync */ 66760ce86c7SWei Liu pdu->size = len; 66860ce86c7SWei Liu pdu->id = id; 66960ce86c7SWei Liu 67060ce86c7SWei Liu pdu_push_and_notify(pdu); 67160ce86c7SWei Liu 67260ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 673f74e27bfSGreg Kurz if (!qemu_co_queue_next(&pdu->complete)) { 67460ce86c7SWei Liu pdu_free(pdu); 67560ce86c7SWei Liu } 676f74e27bfSGreg Kurz } 67760ce86c7SWei Liu 67860ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 67960ce86c7SWei Liu { 68060ce86c7SWei Liu mode_t ret; 68160ce86c7SWei Liu 68260ce86c7SWei Liu ret = mode & 0777; 68360ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 68460ce86c7SWei Liu ret |= S_IFDIR; 68560ce86c7SWei Liu } 68660ce86c7SWei Liu 68760ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 68860ce86c7SWei Liu ret |= S_IFLNK; 68960ce86c7SWei Liu } 69060ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 69160ce86c7SWei Liu ret |= S_IFSOCK; 69260ce86c7SWei Liu } 69360ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 69460ce86c7SWei Liu ret |= S_IFIFO; 69560ce86c7SWei Liu } 69660ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 69760ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 69860ce86c7SWei Liu ret |= S_IFCHR; 69960ce86c7SWei Liu } else { 70060ce86c7SWei Liu ret |= S_IFBLK; 70160ce86c7SWei Liu } 70260ce86c7SWei Liu } 70360ce86c7SWei Liu 70460ce86c7SWei Liu if (!(ret&~0777)) { 70560ce86c7SWei Liu ret |= S_IFREG; 70660ce86c7SWei Liu } 70760ce86c7SWei Liu 70860ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 70960ce86c7SWei Liu ret |= S_ISUID; 71060ce86c7SWei Liu } 71160ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 71260ce86c7SWei Liu ret |= S_ISGID; 71360ce86c7SWei Liu } 71460ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 71560ce86c7SWei Liu ret |= S_ISVTX; 71660ce86c7SWei Liu } 71760ce86c7SWei Liu 71860ce86c7SWei Liu return ret; 71960ce86c7SWei Liu } 72060ce86c7SWei Liu 72160ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 72260ce86c7SWei Liu { 72360ce86c7SWei Liu if (stat->type == -1 && 72460ce86c7SWei Liu stat->dev == -1 && 72560ce86c7SWei Liu stat->qid.type == -1 && 72660ce86c7SWei Liu stat->qid.version == -1 && 72760ce86c7SWei Liu stat->qid.path == -1 && 72860ce86c7SWei Liu stat->mode == -1 && 72960ce86c7SWei Liu stat->atime == -1 && 73060ce86c7SWei Liu stat->mtime == -1 && 73160ce86c7SWei Liu stat->length == -1 && 73260ce86c7SWei Liu !stat->name.size && 73360ce86c7SWei Liu !stat->uid.size && 73460ce86c7SWei Liu !stat->gid.size && 73560ce86c7SWei Liu !stat->muid.size && 73660ce86c7SWei Liu stat->n_uid == -1 && 73760ce86c7SWei Liu stat->n_gid == -1 && 73860ce86c7SWei Liu stat->n_muid == -1) { 73960ce86c7SWei Liu return 1; 74060ce86c7SWei Liu } 74160ce86c7SWei Liu 74260ce86c7SWei Liu return 0; 74360ce86c7SWei Liu } 74460ce86c7SWei Liu 74560ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 74660ce86c7SWei Liu { 74760ce86c7SWei Liu v9fs_string_init(&stat->name); 74860ce86c7SWei Liu v9fs_string_init(&stat->uid); 74960ce86c7SWei Liu v9fs_string_init(&stat->gid); 75060ce86c7SWei Liu v9fs_string_init(&stat->muid); 75160ce86c7SWei Liu v9fs_string_init(&stat->extension); 75260ce86c7SWei Liu } 75360ce86c7SWei Liu 75460ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 75560ce86c7SWei Liu { 75660ce86c7SWei Liu v9fs_string_free(&stat->name); 75760ce86c7SWei Liu v9fs_string_free(&stat->uid); 75860ce86c7SWei Liu v9fs_string_free(&stat->gid); 75960ce86c7SWei Liu v9fs_string_free(&stat->muid); 76060ce86c7SWei Liu v9fs_string_free(&stat->extension); 76160ce86c7SWei Liu } 76260ce86c7SWei Liu 76360ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 76460ce86c7SWei Liu { 76560ce86c7SWei Liu uint32_t mode; 76660ce86c7SWei Liu 76760ce86c7SWei Liu mode = stbuf->st_mode & 0777; 76860ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 76960ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 77060ce86c7SWei Liu } 77160ce86c7SWei Liu 77260ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 77360ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 77460ce86c7SWei Liu } 77560ce86c7SWei Liu 77660ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 77760ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 77860ce86c7SWei Liu } 77960ce86c7SWei Liu 78060ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 78160ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 78260ce86c7SWei Liu } 78360ce86c7SWei Liu 78460ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 78560ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 78660ce86c7SWei Liu } 78760ce86c7SWei Liu 78860ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 78960ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 79060ce86c7SWei Liu } 79160ce86c7SWei Liu 79260ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 79360ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 79460ce86c7SWei Liu } 79560ce86c7SWei Liu 79660ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 79760ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 79860ce86c7SWei Liu } 79960ce86c7SWei Liu 80060ce86c7SWei Liu return mode; 80160ce86c7SWei Liu } 80260ce86c7SWei Liu 8038440e22eSGreg Kurz static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, 80460ce86c7SWei Liu const struct stat *stbuf, 80560ce86c7SWei Liu V9fsStat *v9stat) 80660ce86c7SWei Liu { 80760ce86c7SWei Liu int err; 80860ce86c7SWei Liu const char *str; 80960ce86c7SWei Liu 81060ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 81160ce86c7SWei Liu 81260ce86c7SWei Liu stat_to_qid(stbuf, &v9stat->qid); 81360ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 81460ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 81560ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 81660ce86c7SWei Liu v9stat->length = stbuf->st_size; 81760ce86c7SWei Liu 818abdf0086SGreg Kurz v9fs_string_free(&v9stat->uid); 819abdf0086SGreg Kurz v9fs_string_free(&v9stat->gid); 820abdf0086SGreg Kurz v9fs_string_free(&v9stat->muid); 82160ce86c7SWei Liu 82260ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 82360ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 82460ce86c7SWei Liu v9stat->n_muid = 0; 82560ce86c7SWei Liu 826abdf0086SGreg Kurz v9fs_string_free(&v9stat->extension); 82760ce86c7SWei Liu 82860ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 82960ce86c7SWei Liu err = v9fs_co_readlink(pdu, name, &v9stat->extension); 83060ce86c7SWei Liu if (err < 0) { 83160ce86c7SWei Liu return err; 83260ce86c7SWei Liu } 83360ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 83460ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 83560ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 83660ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 83760ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 83860ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 83960ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 84060ce86c7SWei Liu } 84160ce86c7SWei Liu 84260ce86c7SWei Liu str = strrchr(name->data, '/'); 84360ce86c7SWei Liu if (str) { 84460ce86c7SWei Liu str += 1; 84560ce86c7SWei Liu } else { 84660ce86c7SWei Liu str = name->data; 84760ce86c7SWei Liu } 84860ce86c7SWei Liu 84960ce86c7SWei Liu v9fs_string_sprintf(&v9stat->name, "%s", str); 85060ce86c7SWei Liu 85160ce86c7SWei Liu v9stat->size = 61 + 85260ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 85360ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 85460ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 85560ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 85660ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 85760ce86c7SWei Liu return 0; 85860ce86c7SWei Liu } 85960ce86c7SWei Liu 86060ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 86160ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 86260ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 86360ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 86460ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 86560ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 86660ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 86760ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 86860ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 86960ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 87060ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 87160ce86c7SWei Liu 87260ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 87360ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 87460ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 87560ce86c7SWei Liu 87660ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 87760ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 87860ce86c7SWei Liu 87960ce86c7SWei Liu 88060ce86c7SWei Liu static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, 88160ce86c7SWei Liu V9fsStatDotl *v9lstat) 88260ce86c7SWei Liu { 88360ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 88460ce86c7SWei Liu 88560ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 88660ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 88760ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 88860ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 88960ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 89060ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 89160ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 89260ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 89360ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 89460ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 89560ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 89660ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 89760ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 89860ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 89960ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 90060ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 90160ce86c7SWei Liu 90260ce86c7SWei Liu stat_to_qid(stbuf, &v9lstat->qid); 90360ce86c7SWei Liu } 90460ce86c7SWei Liu 90560ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 90660ce86c7SWei Liu { 90760ce86c7SWei Liu int i; 90860ce86c7SWei Liu 90960ce86c7SWei Liu printf("sg[%d]: {", cnt); 91060ce86c7SWei Liu for (i = 0; i < cnt; i++) { 91160ce86c7SWei Liu if (i) { 91260ce86c7SWei Liu printf(", "); 91360ce86c7SWei Liu } 91460ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 91560ce86c7SWei Liu } 91660ce86c7SWei Liu printf("}\n"); 91760ce86c7SWei Liu } 91860ce86c7SWei Liu 91960ce86c7SWei Liu /* Will call this only for path name based fid */ 92060ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 92160ce86c7SWei Liu { 92260ce86c7SWei Liu V9fsPath str; 92360ce86c7SWei Liu v9fs_path_init(&str); 92460ce86c7SWei Liu v9fs_path_copy(&str, dst); 925e3e83f2eSGreg Kurz v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); 92660ce86c7SWei Liu v9fs_path_free(&str); 92760ce86c7SWei Liu } 92860ce86c7SWei Liu 92960ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 93060ce86c7SWei Liu { 93160ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 93260ce86c7SWei Liu } 93360ce86c7SWei Liu 9348440e22eSGreg Kurz static void coroutine_fn v9fs_version(void *opaque) 93560ce86c7SWei Liu { 93660ce86c7SWei Liu ssize_t err; 93760ce86c7SWei Liu V9fsPDU *pdu = opaque; 93860ce86c7SWei Liu V9fsState *s = pdu->s; 93960ce86c7SWei Liu V9fsString version; 94060ce86c7SWei Liu size_t offset = 7; 94160ce86c7SWei Liu 94260ce86c7SWei Liu v9fs_string_init(&version); 94360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 94460ce86c7SWei Liu if (err < 0) { 94560ce86c7SWei Liu offset = err; 94660ce86c7SWei Liu goto out; 94760ce86c7SWei Liu } 94860ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 94960ce86c7SWei Liu 95060ce86c7SWei Liu virtfs_reset(pdu); 95160ce86c7SWei Liu 95260ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 95360ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 95460ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 95560ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 95660ce86c7SWei Liu } else { 95760ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 95860ce86c7SWei Liu } 95960ce86c7SWei Liu 96060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 96160ce86c7SWei Liu if (err < 0) { 96260ce86c7SWei Liu offset = err; 96360ce86c7SWei Liu goto out; 96460ce86c7SWei Liu } 96560ce86c7SWei Liu offset += err; 96660ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 96760ce86c7SWei Liu out: 96860ce86c7SWei Liu pdu_complete(pdu, offset); 96960ce86c7SWei Liu v9fs_string_free(&version); 97060ce86c7SWei Liu } 97160ce86c7SWei Liu 9728440e22eSGreg Kurz static void coroutine_fn v9fs_attach(void *opaque) 97360ce86c7SWei Liu { 97460ce86c7SWei Liu V9fsPDU *pdu = opaque; 97560ce86c7SWei Liu V9fsState *s = pdu->s; 97660ce86c7SWei Liu int32_t fid, afid, n_uname; 97760ce86c7SWei Liu V9fsString uname, aname; 97860ce86c7SWei Liu V9fsFidState *fidp; 97960ce86c7SWei Liu size_t offset = 7; 98060ce86c7SWei Liu V9fsQID qid; 98160ce86c7SWei Liu ssize_t err; 98260ce86c7SWei Liu 98360ce86c7SWei Liu v9fs_string_init(&uname); 98460ce86c7SWei Liu v9fs_string_init(&aname); 98560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 98660ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 98760ce86c7SWei Liu if (err < 0) { 98860ce86c7SWei Liu goto out_nofid; 98960ce86c7SWei Liu } 99060ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 99160ce86c7SWei Liu 99260ce86c7SWei Liu fidp = alloc_fid(s, fid); 99360ce86c7SWei Liu if (fidp == NULL) { 99460ce86c7SWei Liu err = -EINVAL; 99560ce86c7SWei Liu goto out_nofid; 99660ce86c7SWei Liu } 99760ce86c7SWei Liu fidp->uid = n_uname; 99860ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 99960ce86c7SWei Liu if (err < 0) { 100060ce86c7SWei Liu err = -EINVAL; 100160ce86c7SWei Liu clunk_fid(s, fid); 100260ce86c7SWei Liu goto out; 100360ce86c7SWei Liu } 100460ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 100560ce86c7SWei Liu if (err < 0) { 100660ce86c7SWei Liu err = -EINVAL; 100760ce86c7SWei Liu clunk_fid(s, fid); 100860ce86c7SWei Liu goto out; 100960ce86c7SWei Liu } 101060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 101160ce86c7SWei Liu if (err < 0) { 101260ce86c7SWei Liu clunk_fid(s, fid); 101360ce86c7SWei Liu goto out; 101460ce86c7SWei Liu } 101560ce86c7SWei Liu err += offset; 101656f101ecSGreg Kurz memcpy(&s->root_qid, &qid, sizeof(qid)); 101760ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 101860ce86c7SWei Liu qid.type, qid.version, qid.path); 101960ce86c7SWei Liu /* 102060ce86c7SWei Liu * disable migration if we haven't done already. 102160ce86c7SWei Liu * attach could get called multiple times for the same export. 102260ce86c7SWei Liu */ 102360ce86c7SWei Liu if (!s->migration_blocker) { 102460ce86c7SWei Liu s->root_fid = fid; 102560ce86c7SWei Liu error_setg(&s->migration_blocker, 102660ce86c7SWei Liu "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 102760ce86c7SWei Liu s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 102860ce86c7SWei Liu migrate_add_blocker(s->migration_blocker); 102960ce86c7SWei Liu } 103060ce86c7SWei Liu out: 103160ce86c7SWei Liu put_fid(pdu, fidp); 103260ce86c7SWei Liu out_nofid: 103360ce86c7SWei Liu pdu_complete(pdu, err); 103460ce86c7SWei Liu v9fs_string_free(&uname); 103560ce86c7SWei Liu v9fs_string_free(&aname); 103660ce86c7SWei Liu } 103760ce86c7SWei Liu 10388440e22eSGreg Kurz static void coroutine_fn v9fs_stat(void *opaque) 103960ce86c7SWei Liu { 104060ce86c7SWei Liu int32_t fid; 104160ce86c7SWei Liu V9fsStat v9stat; 104260ce86c7SWei Liu ssize_t err = 0; 104360ce86c7SWei Liu size_t offset = 7; 104460ce86c7SWei Liu struct stat stbuf; 104560ce86c7SWei Liu V9fsFidState *fidp; 104660ce86c7SWei Liu V9fsPDU *pdu = opaque; 104760ce86c7SWei Liu 104860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 104960ce86c7SWei Liu if (err < 0) { 105060ce86c7SWei Liu goto out_nofid; 105160ce86c7SWei Liu } 105260ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 105360ce86c7SWei Liu 105460ce86c7SWei Liu fidp = get_fid(pdu, fid); 105560ce86c7SWei Liu if (fidp == NULL) { 105660ce86c7SWei Liu err = -ENOENT; 105760ce86c7SWei Liu goto out_nofid; 105860ce86c7SWei Liu } 105960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 106060ce86c7SWei Liu if (err < 0) { 106160ce86c7SWei Liu goto out; 106260ce86c7SWei Liu } 106360ce86c7SWei Liu err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); 106460ce86c7SWei Liu if (err < 0) { 106560ce86c7SWei Liu goto out; 106660ce86c7SWei Liu } 106760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 106860ce86c7SWei Liu if (err < 0) { 106960ce86c7SWei Liu v9fs_stat_free(&v9stat); 107060ce86c7SWei Liu goto out; 107160ce86c7SWei Liu } 107260ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 107360ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 107460ce86c7SWei Liu err += offset; 107560ce86c7SWei Liu v9fs_stat_free(&v9stat); 107660ce86c7SWei Liu out: 107760ce86c7SWei Liu put_fid(pdu, fidp); 107860ce86c7SWei Liu out_nofid: 107960ce86c7SWei Liu pdu_complete(pdu, err); 108060ce86c7SWei Liu } 108160ce86c7SWei Liu 10828440e22eSGreg Kurz static void coroutine_fn v9fs_getattr(void *opaque) 108360ce86c7SWei Liu { 108460ce86c7SWei Liu int32_t fid; 108560ce86c7SWei Liu size_t offset = 7; 108660ce86c7SWei Liu ssize_t retval = 0; 108760ce86c7SWei Liu struct stat stbuf; 108860ce86c7SWei Liu V9fsFidState *fidp; 108960ce86c7SWei Liu uint64_t request_mask; 109060ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 109160ce86c7SWei Liu V9fsPDU *pdu = opaque; 109260ce86c7SWei Liu V9fsState *s = pdu->s; 109360ce86c7SWei Liu 109460ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 109560ce86c7SWei Liu if (retval < 0) { 109660ce86c7SWei Liu goto out_nofid; 109760ce86c7SWei Liu } 109860ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 109960ce86c7SWei Liu 110060ce86c7SWei Liu fidp = get_fid(pdu, fid); 110160ce86c7SWei Liu if (fidp == NULL) { 110260ce86c7SWei Liu retval = -ENOENT; 110360ce86c7SWei Liu goto out_nofid; 110460ce86c7SWei Liu } 110560ce86c7SWei Liu /* 110660ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 110760ce86c7SWei Liu * need to look at request_mask. 110860ce86c7SWei Liu */ 110960ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 111060ce86c7SWei Liu if (retval < 0) { 111160ce86c7SWei Liu goto out; 111260ce86c7SWei Liu } 111360ce86c7SWei Liu stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); 111460ce86c7SWei Liu 111560ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 111660ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 111760ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 111860ce86c7SWei Liu switch (retval) { 111960ce86c7SWei Liu case 0: 112060ce86c7SWei Liu /* we have valid st_gen: update result mask */ 112160ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 112260ce86c7SWei Liu break; 112360ce86c7SWei Liu case -EINTR: 112460ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 112560ce86c7SWei Liu goto out; 112660ce86c7SWei Liu default: 112760ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 112860ce86c7SWei Liu break; 112960ce86c7SWei Liu } 113060ce86c7SWei Liu } 113160ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 113260ce86c7SWei Liu if (retval < 0) { 113360ce86c7SWei Liu goto out; 113460ce86c7SWei Liu } 113560ce86c7SWei Liu retval += offset; 113660ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 113760ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 113860ce86c7SWei Liu v9stat_dotl.st_gid); 113960ce86c7SWei Liu out: 114060ce86c7SWei Liu put_fid(pdu, fidp); 114160ce86c7SWei Liu out_nofid: 114260ce86c7SWei Liu pdu_complete(pdu, retval); 114360ce86c7SWei Liu } 114460ce86c7SWei Liu 114560ce86c7SWei Liu /* Attribute flags */ 114660ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 114760ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 114860ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 114960ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 115060ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 115160ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 115260ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 115360ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 115460ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 115560ce86c7SWei Liu 115660ce86c7SWei Liu #define P9_ATTR_MASK 127 115760ce86c7SWei Liu 11588440e22eSGreg Kurz static void coroutine_fn v9fs_setattr(void *opaque) 115960ce86c7SWei Liu { 116060ce86c7SWei Liu int err = 0; 116160ce86c7SWei Liu int32_t fid; 116260ce86c7SWei Liu V9fsFidState *fidp; 116360ce86c7SWei Liu size_t offset = 7; 116460ce86c7SWei Liu V9fsIattr v9iattr; 116560ce86c7SWei Liu V9fsPDU *pdu = opaque; 116660ce86c7SWei Liu 116760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 116860ce86c7SWei Liu if (err < 0) { 116960ce86c7SWei Liu goto out_nofid; 117060ce86c7SWei Liu } 117160ce86c7SWei Liu 117260ce86c7SWei Liu fidp = get_fid(pdu, fid); 117360ce86c7SWei Liu if (fidp == NULL) { 117460ce86c7SWei Liu err = -EINVAL; 117560ce86c7SWei Liu goto out_nofid; 117660ce86c7SWei Liu } 117760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 117860ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 117960ce86c7SWei Liu if (err < 0) { 118060ce86c7SWei Liu goto out; 118160ce86c7SWei Liu } 118260ce86c7SWei Liu } 118360ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 118460ce86c7SWei Liu struct timespec times[2]; 118560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 118660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 118760ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 118860ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 118960ce86c7SWei Liu } else { 119060ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 119160ce86c7SWei Liu } 119260ce86c7SWei Liu } else { 119360ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 119460ce86c7SWei Liu } 119560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 119660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 119760ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 119860ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 119960ce86c7SWei Liu } else { 120060ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 120160ce86c7SWei Liu } 120260ce86c7SWei Liu } else { 120360ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 120460ce86c7SWei Liu } 120560ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 120660ce86c7SWei Liu if (err < 0) { 120760ce86c7SWei Liu goto out; 120860ce86c7SWei Liu } 120960ce86c7SWei Liu } 121060ce86c7SWei Liu /* 121160ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 121260ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 121360ce86c7SWei Liu */ 121460ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 121560ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 121660ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 121760ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 121860ce86c7SWei Liu v9iattr.uid = -1; 121960ce86c7SWei Liu } 122060ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 122160ce86c7SWei Liu v9iattr.gid = -1; 122260ce86c7SWei Liu } 122360ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 122460ce86c7SWei Liu v9iattr.gid); 122560ce86c7SWei Liu if (err < 0) { 122660ce86c7SWei Liu goto out; 122760ce86c7SWei Liu } 122860ce86c7SWei Liu } 122960ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 123060ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 123160ce86c7SWei Liu if (err < 0) { 123260ce86c7SWei Liu goto out; 123360ce86c7SWei Liu } 123460ce86c7SWei Liu } 123560ce86c7SWei Liu err = offset; 123660ce86c7SWei Liu out: 123760ce86c7SWei Liu put_fid(pdu, fidp); 123860ce86c7SWei Liu out_nofid: 123960ce86c7SWei Liu pdu_complete(pdu, err); 124060ce86c7SWei Liu } 124160ce86c7SWei Liu 124260ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 124360ce86c7SWei Liu { 124460ce86c7SWei Liu int i; 124560ce86c7SWei Liu ssize_t err; 124660ce86c7SWei Liu size_t offset = 7; 124760ce86c7SWei Liu 124860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 124960ce86c7SWei Liu if (err < 0) { 125060ce86c7SWei Liu return err; 125160ce86c7SWei Liu } 125260ce86c7SWei Liu offset += err; 125360ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 125460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 125560ce86c7SWei Liu if (err < 0) { 125660ce86c7SWei Liu return err; 125760ce86c7SWei Liu } 125860ce86c7SWei Liu offset += err; 125960ce86c7SWei Liu } 126060ce86c7SWei Liu return offset; 126160ce86c7SWei Liu } 126260ce86c7SWei Liu 1263fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1264fff39a7aSGreg Kurz { 1265fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1266fff39a7aSGreg Kurz } 1267fff39a7aSGreg Kurz 126856f101ecSGreg Kurz static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) 126956f101ecSGreg Kurz { 127056f101ecSGreg Kurz return 127156f101ecSGreg Kurz qid1->type != qid2->type || 127256f101ecSGreg Kurz qid1->version != qid2->version || 127356f101ecSGreg Kurz qid1->path != qid2->path; 127456f101ecSGreg Kurz } 127556f101ecSGreg Kurz 12768440e22eSGreg Kurz static void coroutine_fn v9fs_walk(void *opaque) 127760ce86c7SWei Liu { 127860ce86c7SWei Liu int name_idx; 127960ce86c7SWei Liu V9fsQID *qids = NULL; 128060ce86c7SWei Liu int i, err = 0; 128160ce86c7SWei Liu V9fsPath dpath, path; 128260ce86c7SWei Liu uint16_t nwnames; 128360ce86c7SWei Liu struct stat stbuf; 128460ce86c7SWei Liu size_t offset = 7; 128560ce86c7SWei Liu int32_t fid, newfid; 128660ce86c7SWei Liu V9fsString *wnames = NULL; 128760ce86c7SWei Liu V9fsFidState *fidp; 128860ce86c7SWei Liu V9fsFidState *newfidp = NULL; 128960ce86c7SWei Liu V9fsPDU *pdu = opaque; 129060ce86c7SWei Liu V9fsState *s = pdu->s; 129156f101ecSGreg Kurz V9fsQID qid; 129260ce86c7SWei Liu 129360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 129460ce86c7SWei Liu if (err < 0) { 129560ce86c7SWei Liu pdu_complete(pdu, err); 129660ce86c7SWei Liu return ; 129760ce86c7SWei Liu } 129860ce86c7SWei Liu offset += err; 129960ce86c7SWei Liu 130060ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 130160ce86c7SWei Liu 130260ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 130360ce86c7SWei Liu wnames = g_malloc0(sizeof(wnames[0]) * nwnames); 130460ce86c7SWei Liu qids = g_malloc0(sizeof(qids[0]) * nwnames); 130560ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 130660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 130760ce86c7SWei Liu if (err < 0) { 130860ce86c7SWei Liu goto out_nofid; 130960ce86c7SWei Liu } 1310fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1311fff39a7aSGreg Kurz err = -ENOENT; 1312fff39a7aSGreg Kurz goto out_nofid; 1313fff39a7aSGreg Kurz } 131460ce86c7SWei Liu offset += err; 131560ce86c7SWei Liu } 131660ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 131760ce86c7SWei Liu err = -EINVAL; 131860ce86c7SWei Liu goto out_nofid; 131960ce86c7SWei Liu } 132060ce86c7SWei Liu fidp = get_fid(pdu, fid); 132160ce86c7SWei Liu if (fidp == NULL) { 132260ce86c7SWei Liu err = -ENOENT; 132360ce86c7SWei Liu goto out_nofid; 132460ce86c7SWei Liu } 132556f101ecSGreg Kurz 132613fd08e6SGreg Kurz v9fs_path_init(&dpath); 132713fd08e6SGreg Kurz v9fs_path_init(&path); 132813fd08e6SGreg Kurz 132956f101ecSGreg Kurz err = fid_to_qid(pdu, fidp, &qid); 133056f101ecSGreg Kurz if (err < 0) { 133156f101ecSGreg Kurz goto out; 133256f101ecSGreg Kurz } 133356f101ecSGreg Kurz 133460ce86c7SWei Liu /* 133560ce86c7SWei Liu * Both dpath and path initially poin to fidp. 133660ce86c7SWei Liu * Needed to handle request with nwnames == 0 133760ce86c7SWei Liu */ 133860ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 133960ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 134060ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 134156f101ecSGreg Kurz if (not_same_qid(&pdu->s->root_qid, &qid) || 134256f101ecSGreg Kurz strcmp("..", wnames[name_idx].data)) { 134356f101ecSGreg Kurz err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, 134456f101ecSGreg Kurz &path); 134560ce86c7SWei Liu if (err < 0) { 134660ce86c7SWei Liu goto out; 134760ce86c7SWei Liu } 134856f101ecSGreg Kurz 134960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 135060ce86c7SWei Liu if (err < 0) { 135160ce86c7SWei Liu goto out; 135260ce86c7SWei Liu } 135356f101ecSGreg Kurz stat_to_qid(&stbuf, &qid); 135460ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 135560ce86c7SWei Liu } 135656f101ecSGreg Kurz memcpy(&qids[name_idx], &qid, sizeof(qid)); 135756f101ecSGreg Kurz } 135860ce86c7SWei Liu if (fid == newfid) { 135949dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 136049dd946bSGreg Kurz err = -EINVAL; 136149dd946bSGreg Kurz goto out; 136249dd946bSGreg Kurz } 136360ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 136460ce86c7SWei Liu } else { 136560ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 136660ce86c7SWei Liu if (newfidp == NULL) { 136760ce86c7SWei Liu err = -EINVAL; 136860ce86c7SWei Liu goto out; 136960ce86c7SWei Liu } 137060ce86c7SWei Liu newfidp->uid = fidp->uid; 137160ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 137260ce86c7SWei Liu } 137360ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 137460ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 137560ce86c7SWei Liu out: 137660ce86c7SWei Liu put_fid(pdu, fidp); 137760ce86c7SWei Liu if (newfidp) { 137860ce86c7SWei Liu put_fid(pdu, newfidp); 137960ce86c7SWei Liu } 138060ce86c7SWei Liu v9fs_path_free(&dpath); 138160ce86c7SWei Liu v9fs_path_free(&path); 138260ce86c7SWei Liu out_nofid: 138360ce86c7SWei Liu pdu_complete(pdu, err); 138460ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 138560ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 138660ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 138760ce86c7SWei Liu } 138860ce86c7SWei Liu g_free(wnames); 138960ce86c7SWei Liu g_free(qids); 139060ce86c7SWei Liu } 139160ce86c7SWei Liu } 139260ce86c7SWei Liu 13938440e22eSGreg Kurz static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) 139460ce86c7SWei Liu { 139560ce86c7SWei Liu struct statfs stbuf; 139660ce86c7SWei Liu int32_t iounit = 0; 139760ce86c7SWei Liu V9fsState *s = pdu->s; 139860ce86c7SWei Liu 139960ce86c7SWei Liu /* 140060ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 140160ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 140260ce86c7SWei Liu */ 140360ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 140460ce86c7SWei Liu iounit = stbuf.f_bsize; 140560ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 140660ce86c7SWei Liu } 140760ce86c7SWei Liu if (!iounit) { 140860ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 140960ce86c7SWei Liu } 141060ce86c7SWei Liu return iounit; 141160ce86c7SWei Liu } 141260ce86c7SWei Liu 14138440e22eSGreg Kurz static void coroutine_fn v9fs_open(void *opaque) 141460ce86c7SWei Liu { 141560ce86c7SWei Liu int flags; 141660ce86c7SWei Liu int32_t fid; 141760ce86c7SWei Liu int32_t mode; 141860ce86c7SWei Liu V9fsQID qid; 141960ce86c7SWei Liu int iounit = 0; 142060ce86c7SWei Liu ssize_t err = 0; 142160ce86c7SWei Liu size_t offset = 7; 142260ce86c7SWei Liu struct stat stbuf; 142360ce86c7SWei Liu V9fsFidState *fidp; 142460ce86c7SWei Liu V9fsPDU *pdu = opaque; 142560ce86c7SWei Liu V9fsState *s = pdu->s; 142660ce86c7SWei Liu 142760ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 142860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 142960ce86c7SWei Liu } else { 143060ce86c7SWei Liu uint8_t modebyte; 143160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 143260ce86c7SWei Liu mode = modebyte; 143360ce86c7SWei Liu } 143460ce86c7SWei Liu if (err < 0) { 143560ce86c7SWei Liu goto out_nofid; 143660ce86c7SWei Liu } 143760ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 143860ce86c7SWei Liu 143960ce86c7SWei Liu fidp = get_fid(pdu, fid); 144060ce86c7SWei Liu if (fidp == NULL) { 144160ce86c7SWei Liu err = -ENOENT; 144260ce86c7SWei Liu goto out_nofid; 144360ce86c7SWei Liu } 144449dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 144549dd946bSGreg Kurz err = -EINVAL; 144649dd946bSGreg Kurz goto out; 144749dd946bSGreg Kurz } 144860ce86c7SWei Liu 144960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 145060ce86c7SWei Liu if (err < 0) { 145160ce86c7SWei Liu goto out; 145260ce86c7SWei Liu } 145360ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 145460ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 145560ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 145660ce86c7SWei Liu if (err < 0) { 145760ce86c7SWei Liu goto out; 145860ce86c7SWei Liu } 145960ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 146060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 146160ce86c7SWei Liu if (err < 0) { 146260ce86c7SWei Liu goto out; 146360ce86c7SWei Liu } 146460ce86c7SWei Liu err += offset; 146560ce86c7SWei Liu } else { 146660ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 146760ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 146860ce86c7SWei Liu } else { 146960ce86c7SWei Liu flags = omode_to_uflags(mode); 147060ce86c7SWei Liu } 147160ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 147260ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 147360ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 147460ce86c7SWei Liu err = -EROFS; 147560ce86c7SWei Liu goto out; 147660ce86c7SWei Liu } 147760ce86c7SWei Liu } 147860ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 147960ce86c7SWei Liu if (err < 0) { 148060ce86c7SWei Liu goto out; 148160ce86c7SWei Liu } 148260ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 148360ce86c7SWei Liu fidp->open_flags = flags; 148460ce86c7SWei Liu if (flags & O_EXCL) { 148560ce86c7SWei Liu /* 148660ce86c7SWei Liu * We let the host file system do O_EXCL check 148760ce86c7SWei Liu * We should not reclaim such fd 148860ce86c7SWei Liu */ 148960ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 149060ce86c7SWei Liu } 149160ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 149260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 149360ce86c7SWei Liu if (err < 0) { 149460ce86c7SWei Liu goto out; 149560ce86c7SWei Liu } 149660ce86c7SWei Liu err += offset; 149760ce86c7SWei Liu } 149860ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 149960ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 150060ce86c7SWei Liu out: 150160ce86c7SWei Liu put_fid(pdu, fidp); 150260ce86c7SWei Liu out_nofid: 150360ce86c7SWei Liu pdu_complete(pdu, err); 150460ce86c7SWei Liu } 150560ce86c7SWei Liu 15068440e22eSGreg Kurz static void coroutine_fn v9fs_lcreate(void *opaque) 150760ce86c7SWei Liu { 150860ce86c7SWei Liu int32_t dfid, flags, mode; 150960ce86c7SWei Liu gid_t gid; 151060ce86c7SWei Liu ssize_t err = 0; 151160ce86c7SWei Liu ssize_t offset = 7; 151260ce86c7SWei Liu V9fsString name; 151360ce86c7SWei Liu V9fsFidState *fidp; 151460ce86c7SWei Liu struct stat stbuf; 151560ce86c7SWei Liu V9fsQID qid; 151660ce86c7SWei Liu int32_t iounit; 151760ce86c7SWei Liu V9fsPDU *pdu = opaque; 151860ce86c7SWei Liu 151960ce86c7SWei Liu v9fs_string_init(&name); 152060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 152160ce86c7SWei Liu &name, &flags, &mode, &gid); 152260ce86c7SWei Liu if (err < 0) { 152360ce86c7SWei Liu goto out_nofid; 152460ce86c7SWei Liu } 152560ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 152660ce86c7SWei Liu 1527fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1528fff39a7aSGreg Kurz err = -ENOENT; 1529fff39a7aSGreg Kurz goto out_nofid; 1530fff39a7aSGreg Kurz } 1531fff39a7aSGreg Kurz 1532805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1533805b5d98SGreg Kurz err = -EEXIST; 1534805b5d98SGreg Kurz goto out_nofid; 1535805b5d98SGreg Kurz } 1536805b5d98SGreg Kurz 153760ce86c7SWei Liu fidp = get_fid(pdu, dfid); 153860ce86c7SWei Liu if (fidp == NULL) { 153960ce86c7SWei Liu err = -ENOENT; 154060ce86c7SWei Liu goto out_nofid; 154160ce86c7SWei Liu } 154260ce86c7SWei Liu 154360ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 154460ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 154560ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 154660ce86c7SWei Liu if (err < 0) { 154760ce86c7SWei Liu goto out; 154860ce86c7SWei Liu } 154960ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 155060ce86c7SWei Liu fidp->open_flags = flags; 155160ce86c7SWei Liu if (flags & O_EXCL) { 155260ce86c7SWei Liu /* 155360ce86c7SWei Liu * We let the host file system do O_EXCL check 155460ce86c7SWei Liu * We should not reclaim such fd 155560ce86c7SWei Liu */ 155660ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 155760ce86c7SWei Liu } 155860ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 155960ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 156060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 156160ce86c7SWei Liu if (err < 0) { 156260ce86c7SWei Liu goto out; 156360ce86c7SWei Liu } 156460ce86c7SWei Liu err += offset; 156560ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 156660ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 156760ce86c7SWei Liu out: 156860ce86c7SWei Liu put_fid(pdu, fidp); 156960ce86c7SWei Liu out_nofid: 157060ce86c7SWei Liu pdu_complete(pdu, err); 157160ce86c7SWei Liu v9fs_string_free(&name); 157260ce86c7SWei Liu } 157360ce86c7SWei Liu 1574a1bf8b74SGreg Kurz static void coroutine_fn v9fs_fsync(void *opaque) 157560ce86c7SWei Liu { 157660ce86c7SWei Liu int err; 157760ce86c7SWei Liu int32_t fid; 157860ce86c7SWei Liu int datasync; 157960ce86c7SWei Liu size_t offset = 7; 158060ce86c7SWei Liu V9fsFidState *fidp; 158160ce86c7SWei Liu V9fsPDU *pdu = opaque; 158260ce86c7SWei Liu 158360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 158460ce86c7SWei Liu if (err < 0) { 158560ce86c7SWei Liu goto out_nofid; 158660ce86c7SWei Liu } 158760ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 158860ce86c7SWei Liu 158960ce86c7SWei Liu fidp = get_fid(pdu, fid); 159060ce86c7SWei Liu if (fidp == NULL) { 159160ce86c7SWei Liu err = -ENOENT; 159260ce86c7SWei Liu goto out_nofid; 159360ce86c7SWei Liu } 159460ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 159560ce86c7SWei Liu if (!err) { 159660ce86c7SWei Liu err = offset; 159760ce86c7SWei Liu } 159860ce86c7SWei Liu put_fid(pdu, fidp); 159960ce86c7SWei Liu out_nofid: 160060ce86c7SWei Liu pdu_complete(pdu, err); 160160ce86c7SWei Liu } 160260ce86c7SWei Liu 16038440e22eSGreg Kurz static void coroutine_fn v9fs_clunk(void *opaque) 160460ce86c7SWei Liu { 160560ce86c7SWei Liu int err; 160660ce86c7SWei Liu int32_t fid; 160760ce86c7SWei Liu size_t offset = 7; 160860ce86c7SWei Liu V9fsFidState *fidp; 160960ce86c7SWei Liu V9fsPDU *pdu = opaque; 161060ce86c7SWei Liu V9fsState *s = pdu->s; 161160ce86c7SWei Liu 161260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 161360ce86c7SWei Liu if (err < 0) { 161460ce86c7SWei Liu goto out_nofid; 161560ce86c7SWei Liu } 161660ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 161760ce86c7SWei Liu 161860ce86c7SWei Liu fidp = clunk_fid(s, fid); 161960ce86c7SWei Liu if (fidp == NULL) { 162060ce86c7SWei Liu err = -ENOENT; 162160ce86c7SWei Liu goto out_nofid; 162260ce86c7SWei Liu } 162360ce86c7SWei Liu /* 162460ce86c7SWei Liu * Bump the ref so that put_fid will 162560ce86c7SWei Liu * free the fid. 162660ce86c7SWei Liu */ 162760ce86c7SWei Liu fidp->ref++; 162860ce86c7SWei Liu err = put_fid(pdu, fidp); 162960ce86c7SWei Liu if (!err) { 163060ce86c7SWei Liu err = offset; 163160ce86c7SWei Liu } 163260ce86c7SWei Liu out_nofid: 163360ce86c7SWei Liu pdu_complete(pdu, err); 163460ce86c7SWei Liu } 163560ce86c7SWei Liu 1636bcb8998fSStefano Stabellini /* 1637bcb8998fSStefano Stabellini * Create a QEMUIOVector for a sub-region of PDU iovecs 1638bcb8998fSStefano Stabellini * 1639bcb8998fSStefano Stabellini * @qiov: uninitialized QEMUIOVector 1640bcb8998fSStefano Stabellini * @skip: number of bytes to skip from beginning of PDU 1641bcb8998fSStefano Stabellini * @size: number of bytes to include 1642bcb8998fSStefano Stabellini * @is_write: true - write, false - read 1643bcb8998fSStefano Stabellini * 1644bcb8998fSStefano Stabellini * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 1645bcb8998fSStefano Stabellini * with qemu_iovec_destroy(). 1646bcb8998fSStefano Stabellini */ 1647bcb8998fSStefano Stabellini static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 1648bcb8998fSStefano Stabellini size_t skip, size_t size, 1649bcb8998fSStefano Stabellini bool is_write) 1650bcb8998fSStefano Stabellini { 1651bcb8998fSStefano Stabellini QEMUIOVector elem; 1652bcb8998fSStefano Stabellini struct iovec *iov; 1653bcb8998fSStefano Stabellini unsigned int niov; 1654bcb8998fSStefano Stabellini 165588da0b03SStefano Stabellini if (is_write) { 165688da0b03SStefano Stabellini pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov); 165788da0b03SStefano Stabellini } else { 1658*fa0eb5c5SGreg Kurz pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); 165988da0b03SStefano Stabellini } 1660bcb8998fSStefano Stabellini 1661bcb8998fSStefano Stabellini qemu_iovec_init_external(&elem, iov, niov); 1662bcb8998fSStefano Stabellini qemu_iovec_init(qiov, niov); 1663bcb8998fSStefano Stabellini qemu_iovec_concat(qiov, &elem, skip, size); 1664bcb8998fSStefano Stabellini } 1665bcb8998fSStefano Stabellini 166660ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 166760ce86c7SWei Liu uint64_t off, uint32_t max_count) 166860ce86c7SWei Liu { 166960ce86c7SWei Liu ssize_t err; 167060ce86c7SWei Liu size_t offset = 7; 16717e55d65cSLi Qiang uint64_t read_count; 1672bcb8998fSStefano Stabellini QEMUIOVector qiov_full; 167360ce86c7SWei Liu 16747e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 16757e55d65cSLi Qiang read_count = 0; 16767e55d65cSLi Qiang } else { 16777e55d65cSLi Qiang read_count = fidp->fs.xattr.len - off; 16787e55d65cSLi Qiang } 167960ce86c7SWei Liu if (read_count > max_count) { 168060ce86c7SWei Liu read_count = max_count; 168160ce86c7SWei Liu } 168260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 168360ce86c7SWei Liu if (err < 0) { 168460ce86c7SWei Liu return err; 168560ce86c7SWei Liu } 168660ce86c7SWei Liu offset += err; 168700588a0aSWei Liu 1688*fa0eb5c5SGreg Kurz v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); 1689*fa0eb5c5SGreg Kurz err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, 169060ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 169160ce86c7SWei Liu read_count); 1692bcb8998fSStefano Stabellini qemu_iovec_destroy(&qiov_full); 169360ce86c7SWei Liu if (err < 0) { 169460ce86c7SWei Liu return err; 169560ce86c7SWei Liu } 169660ce86c7SWei Liu offset += err; 169760ce86c7SWei Liu return offset; 169860ce86c7SWei Liu } 169960ce86c7SWei Liu 17008440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, 17018440e22eSGreg Kurz V9fsFidState *fidp, 17028440e22eSGreg Kurz uint32_t max_count) 170360ce86c7SWei Liu { 170460ce86c7SWei Liu V9fsPath path; 170560ce86c7SWei Liu V9fsStat v9stat; 170660ce86c7SWei Liu int len, err = 0; 170760ce86c7SWei Liu int32_t count = 0; 170860ce86c7SWei Liu struct stat stbuf; 170960ce86c7SWei Liu off_t saved_dir_pos; 1710635324e8SGreg Kurz struct dirent *dent; 171160ce86c7SWei Liu 171260ce86c7SWei Liu /* save the directory position */ 171360ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 171460ce86c7SWei Liu if (saved_dir_pos < 0) { 171560ce86c7SWei Liu return saved_dir_pos; 171660ce86c7SWei Liu } 171760ce86c7SWei Liu 171860ce86c7SWei Liu while (1) { 171960ce86c7SWei Liu v9fs_path_init(&path); 17207cde47d4SGreg Kurz 17217cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 17227cde47d4SGreg Kurz 1723635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1724635324e8SGreg Kurz if (err || !dent) { 172560ce86c7SWei Liu break; 172660ce86c7SWei Liu } 172760ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 172860ce86c7SWei Liu if (err < 0) { 17298762a46dSGreg Kurz break; 173060ce86c7SWei Liu } 173160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 173260ce86c7SWei Liu if (err < 0) { 17338762a46dSGreg Kurz break; 173460ce86c7SWei Liu } 173560ce86c7SWei Liu err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); 173660ce86c7SWei Liu if (err < 0) { 17378762a46dSGreg Kurz break; 173860ce86c7SWei Liu } 173960ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 174060ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 17417cde47d4SGreg Kurz 17427cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 17437cde47d4SGreg Kurz 174460ce86c7SWei Liu if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { 174560ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 174660ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 174760ce86c7SWei Liu v9fs_stat_free(&v9stat); 174860ce86c7SWei Liu v9fs_path_free(&path); 174960ce86c7SWei Liu return count; 175060ce86c7SWei Liu } 175160ce86c7SWei Liu count += len; 175260ce86c7SWei Liu v9fs_stat_free(&v9stat); 175360ce86c7SWei Liu v9fs_path_free(&path); 175460ce86c7SWei Liu saved_dir_pos = dent->d_off; 175560ce86c7SWei Liu } 17568762a46dSGreg Kurz 17577cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 17587cde47d4SGreg Kurz 175960ce86c7SWei Liu v9fs_path_free(&path); 176060ce86c7SWei Liu if (err < 0) { 176160ce86c7SWei Liu return err; 176260ce86c7SWei Liu } 176360ce86c7SWei Liu return count; 176460ce86c7SWei Liu } 176560ce86c7SWei Liu 17668440e22eSGreg Kurz static void coroutine_fn v9fs_read(void *opaque) 176760ce86c7SWei Liu { 176860ce86c7SWei Liu int32_t fid; 176960ce86c7SWei Liu uint64_t off; 177060ce86c7SWei Liu ssize_t err = 0; 177160ce86c7SWei Liu int32_t count = 0; 177260ce86c7SWei Liu size_t offset = 7; 177360ce86c7SWei Liu uint32_t max_count; 177460ce86c7SWei Liu V9fsFidState *fidp; 177560ce86c7SWei Liu V9fsPDU *pdu = opaque; 177660ce86c7SWei Liu V9fsState *s = pdu->s; 177760ce86c7SWei Liu 177860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 177960ce86c7SWei Liu if (err < 0) { 178060ce86c7SWei Liu goto out_nofid; 178160ce86c7SWei Liu } 178260ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 178360ce86c7SWei Liu 178460ce86c7SWei Liu fidp = get_fid(pdu, fid); 178560ce86c7SWei Liu if (fidp == NULL) { 178660ce86c7SWei Liu err = -EINVAL; 178760ce86c7SWei Liu goto out_nofid; 178860ce86c7SWei Liu } 178960ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 179060ce86c7SWei Liu 179160ce86c7SWei Liu if (off == 0) { 179260ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 179360ce86c7SWei Liu } 179460ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 179560ce86c7SWei Liu if (count < 0) { 179660ce86c7SWei Liu err = count; 179760ce86c7SWei Liu goto out; 179860ce86c7SWei Liu } 179960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 180060ce86c7SWei Liu if (err < 0) { 180160ce86c7SWei Liu goto out; 180260ce86c7SWei Liu } 180360ce86c7SWei Liu err += offset + count; 180460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 180560ce86c7SWei Liu QEMUIOVector qiov_full; 180660ce86c7SWei Liu QEMUIOVector qiov; 180760ce86c7SWei Liu int32_t len; 180860ce86c7SWei Liu 180960ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 181060ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 181160ce86c7SWei Liu do { 181260ce86c7SWei Liu qemu_iovec_reset(&qiov); 181360ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 181460ce86c7SWei Liu if (0) { 181560ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 181660ce86c7SWei Liu } 181760ce86c7SWei Liu /* Loop in case of EINTR */ 181860ce86c7SWei Liu do { 181960ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 182060ce86c7SWei Liu if (len >= 0) { 182160ce86c7SWei Liu off += len; 182260ce86c7SWei Liu count += len; 182360ce86c7SWei Liu } 182460ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 182560ce86c7SWei Liu if (len < 0) { 182660ce86c7SWei Liu /* IO error return the error */ 182760ce86c7SWei Liu err = len; 1828e95c9a49SLi Qiang goto out_free_iovec; 182960ce86c7SWei Liu } 183060ce86c7SWei Liu } while (count < max_count && len > 0); 183160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 183260ce86c7SWei Liu if (err < 0) { 1833e95c9a49SLi Qiang goto out_free_iovec; 183460ce86c7SWei Liu } 183560ce86c7SWei Liu err += offset + count; 1836e95c9a49SLi Qiang out_free_iovec: 183760ce86c7SWei Liu qemu_iovec_destroy(&qiov); 183860ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 183960ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 184060ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 184160ce86c7SWei Liu } else { 184260ce86c7SWei Liu err = -EINVAL; 184360ce86c7SWei Liu } 184460ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 184560ce86c7SWei Liu out: 184660ce86c7SWei Liu put_fid(pdu, fidp); 184760ce86c7SWei Liu out_nofid: 184860ce86c7SWei Liu pdu_complete(pdu, err); 184960ce86c7SWei Liu } 185060ce86c7SWei Liu 185160ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 185260ce86c7SWei Liu { 185360ce86c7SWei Liu /* 185460ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 185560ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 185660ce86c7SWei Liu */ 185760ce86c7SWei Liu return 24 + v9fs_string_size(name); 185860ce86c7SWei Liu } 185960ce86c7SWei Liu 18608440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, 18618440e22eSGreg Kurz int32_t max_count) 186260ce86c7SWei Liu { 186360ce86c7SWei Liu size_t size; 186460ce86c7SWei Liu V9fsQID qid; 186560ce86c7SWei Liu V9fsString name; 186660ce86c7SWei Liu int len, err = 0; 186760ce86c7SWei Liu int32_t count = 0; 186860ce86c7SWei Liu off_t saved_dir_pos; 1869635324e8SGreg Kurz struct dirent *dent; 187060ce86c7SWei Liu 187160ce86c7SWei Liu /* save the directory position */ 187260ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 187360ce86c7SWei Liu if (saved_dir_pos < 0) { 187460ce86c7SWei Liu return saved_dir_pos; 187560ce86c7SWei Liu } 187660ce86c7SWei Liu 187760ce86c7SWei Liu while (1) { 18787cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 18797cde47d4SGreg Kurz 1880635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1881635324e8SGreg Kurz if (err || !dent) { 188260ce86c7SWei Liu break; 188360ce86c7SWei Liu } 188460ce86c7SWei Liu v9fs_string_init(&name); 188560ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 188660ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 18877cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18887cde47d4SGreg Kurz 188960ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 189060ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 189160ce86c7SWei Liu v9fs_string_free(&name); 189260ce86c7SWei Liu return count; 189360ce86c7SWei Liu } 189460ce86c7SWei Liu /* 189560ce86c7SWei Liu * Fill up just the path field of qid because the client uses 189660ce86c7SWei Liu * only that. To fill the entire qid structure we will have 189760ce86c7SWei Liu * to stat each dirent found, which is expensive 189860ce86c7SWei Liu */ 189960ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 190060ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 190160ce86c7SWei Liu /* Fill the other fields with dummy values */ 190260ce86c7SWei Liu qid.type = 0; 190360ce86c7SWei Liu qid.version = 0; 190460ce86c7SWei Liu 190560ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 190660ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 190760ce86c7SWei Liu &qid, dent->d_off, 190860ce86c7SWei Liu dent->d_type, &name); 19097cde47d4SGreg Kurz 19107cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19117cde47d4SGreg Kurz 191260ce86c7SWei Liu if (len < 0) { 191360ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 191460ce86c7SWei Liu v9fs_string_free(&name); 191560ce86c7SWei Liu return len; 191660ce86c7SWei Liu } 191760ce86c7SWei Liu count += len; 191860ce86c7SWei Liu v9fs_string_free(&name); 191960ce86c7SWei Liu saved_dir_pos = dent->d_off; 192060ce86c7SWei Liu } 19217cde47d4SGreg Kurz 19227cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19237cde47d4SGreg Kurz 192460ce86c7SWei Liu if (err < 0) { 192560ce86c7SWei Liu return err; 192660ce86c7SWei Liu } 192760ce86c7SWei Liu return count; 192860ce86c7SWei Liu } 192960ce86c7SWei Liu 19308440e22eSGreg Kurz static void coroutine_fn v9fs_readdir(void *opaque) 193160ce86c7SWei Liu { 193260ce86c7SWei Liu int32_t fid; 193360ce86c7SWei Liu V9fsFidState *fidp; 193460ce86c7SWei Liu ssize_t retval = 0; 193560ce86c7SWei Liu size_t offset = 7; 193660ce86c7SWei Liu uint64_t initial_offset; 193760ce86c7SWei Liu int32_t count; 193860ce86c7SWei Liu uint32_t max_count; 193960ce86c7SWei Liu V9fsPDU *pdu = opaque; 194060ce86c7SWei Liu 194160ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 194260ce86c7SWei Liu &initial_offset, &max_count); 194360ce86c7SWei Liu if (retval < 0) { 194460ce86c7SWei Liu goto out_nofid; 194560ce86c7SWei Liu } 194660ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 194760ce86c7SWei Liu 194860ce86c7SWei Liu fidp = get_fid(pdu, fid); 194960ce86c7SWei Liu if (fidp == NULL) { 195060ce86c7SWei Liu retval = -EINVAL; 195160ce86c7SWei Liu goto out_nofid; 195260ce86c7SWei Liu } 1953f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 195460ce86c7SWei Liu retval = -EINVAL; 195560ce86c7SWei Liu goto out; 195660ce86c7SWei Liu } 195760ce86c7SWei Liu if (initial_offset == 0) { 195860ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 195960ce86c7SWei Liu } else { 196060ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 196160ce86c7SWei Liu } 196260ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 196360ce86c7SWei Liu if (count < 0) { 196460ce86c7SWei Liu retval = count; 196560ce86c7SWei Liu goto out; 196660ce86c7SWei Liu } 196760ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 196860ce86c7SWei Liu if (retval < 0) { 196960ce86c7SWei Liu goto out; 197060ce86c7SWei Liu } 197160ce86c7SWei Liu retval += count + offset; 197260ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 197360ce86c7SWei Liu out: 197460ce86c7SWei Liu put_fid(pdu, fidp); 197560ce86c7SWei Liu out_nofid: 197660ce86c7SWei Liu pdu_complete(pdu, retval); 197760ce86c7SWei Liu } 197860ce86c7SWei Liu 197960ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 198060ce86c7SWei Liu uint64_t off, uint32_t count, 198160ce86c7SWei Liu struct iovec *sg, int cnt) 198260ce86c7SWei Liu { 198360ce86c7SWei Liu int i, to_copy; 198460ce86c7SWei Liu ssize_t err = 0; 19857e55d65cSLi Qiang uint64_t write_count; 198660ce86c7SWei Liu size_t offset = 7; 198760ce86c7SWei Liu 198860ce86c7SWei Liu 19897e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 199060ce86c7SWei Liu err = -ENOSPC; 199160ce86c7SWei Liu goto out; 199260ce86c7SWei Liu } 19937e55d65cSLi Qiang write_count = fidp->fs.xattr.len - off; 19947e55d65cSLi Qiang if (write_count > count) { 19957e55d65cSLi Qiang write_count = count; 19967e55d65cSLi Qiang } 199760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 199860ce86c7SWei Liu if (err < 0) { 199960ce86c7SWei Liu return err; 200060ce86c7SWei Liu } 200160ce86c7SWei Liu err += offset; 200260ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 200360ce86c7SWei Liu /* 200460ce86c7SWei Liu * Now copy the content from sg list 200560ce86c7SWei Liu */ 200660ce86c7SWei Liu for (i = 0; i < cnt; i++) { 200760ce86c7SWei Liu if (write_count > sg[i].iov_len) { 200860ce86c7SWei Liu to_copy = sg[i].iov_len; 200960ce86c7SWei Liu } else { 201060ce86c7SWei Liu to_copy = write_count; 201160ce86c7SWei Liu } 201260ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 201360ce86c7SWei Liu /* updating vs->off since we are not using below */ 201460ce86c7SWei Liu off += to_copy; 201560ce86c7SWei Liu write_count -= to_copy; 201660ce86c7SWei Liu } 201760ce86c7SWei Liu out: 201860ce86c7SWei Liu return err; 201960ce86c7SWei Liu } 202060ce86c7SWei Liu 20218440e22eSGreg Kurz static void coroutine_fn v9fs_write(void *opaque) 202260ce86c7SWei Liu { 202360ce86c7SWei Liu ssize_t err; 202460ce86c7SWei Liu int32_t fid; 202560ce86c7SWei Liu uint64_t off; 202660ce86c7SWei Liu uint32_t count; 202760ce86c7SWei Liu int32_t len = 0; 202860ce86c7SWei Liu int32_t total = 0; 202960ce86c7SWei Liu size_t offset = 7; 203060ce86c7SWei Liu V9fsFidState *fidp; 203160ce86c7SWei Liu V9fsPDU *pdu = opaque; 203260ce86c7SWei Liu V9fsState *s = pdu->s; 203360ce86c7SWei Liu QEMUIOVector qiov_full; 203460ce86c7SWei Liu QEMUIOVector qiov; 203560ce86c7SWei Liu 203660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 203760ce86c7SWei Liu if (err < 0) { 203860ce86c7SWei Liu pdu_complete(pdu, err); 203960ce86c7SWei Liu return; 204060ce86c7SWei Liu } 204160ce86c7SWei Liu offset += err; 204260ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 204360ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 204460ce86c7SWei Liu 204560ce86c7SWei Liu fidp = get_fid(pdu, fid); 204660ce86c7SWei Liu if (fidp == NULL) { 204760ce86c7SWei Liu err = -EINVAL; 204860ce86c7SWei Liu goto out_nofid; 204960ce86c7SWei Liu } 205060ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 205160ce86c7SWei Liu if (fidp->fs.fd == -1) { 205260ce86c7SWei Liu err = -EINVAL; 205360ce86c7SWei Liu goto out; 205460ce86c7SWei Liu } 205560ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 205660ce86c7SWei Liu /* 205760ce86c7SWei Liu * setxattr operation 205860ce86c7SWei Liu */ 205960ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 206060ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 206160ce86c7SWei Liu goto out; 206260ce86c7SWei Liu } else { 206360ce86c7SWei Liu err = -EINVAL; 206460ce86c7SWei Liu goto out; 206560ce86c7SWei Liu } 206660ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 206760ce86c7SWei Liu do { 206860ce86c7SWei Liu qemu_iovec_reset(&qiov); 206960ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 207060ce86c7SWei Liu if (0) { 207160ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 207260ce86c7SWei Liu } 207360ce86c7SWei Liu /* Loop in case of EINTR */ 207460ce86c7SWei Liu do { 207560ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 207660ce86c7SWei Liu if (len >= 0) { 207760ce86c7SWei Liu off += len; 207860ce86c7SWei Liu total += len; 207960ce86c7SWei Liu } 208060ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 208160ce86c7SWei Liu if (len < 0) { 208260ce86c7SWei Liu /* IO error return the error */ 208360ce86c7SWei Liu err = len; 208460ce86c7SWei Liu goto out_qiov; 208560ce86c7SWei Liu } 208660ce86c7SWei Liu } while (total < count && len > 0); 208760ce86c7SWei Liu 208860ce86c7SWei Liu offset = 7; 208960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 209060ce86c7SWei Liu if (err < 0) { 2091fdfcc9aeSLi Qiang goto out_qiov; 209260ce86c7SWei Liu } 209360ce86c7SWei Liu err += offset; 209460ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 209560ce86c7SWei Liu out_qiov: 209660ce86c7SWei Liu qemu_iovec_destroy(&qiov); 209760ce86c7SWei Liu out: 209860ce86c7SWei Liu put_fid(pdu, fidp); 209960ce86c7SWei Liu out_nofid: 210060ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 210160ce86c7SWei Liu pdu_complete(pdu, err); 210260ce86c7SWei Liu } 210360ce86c7SWei Liu 21048440e22eSGreg Kurz static void coroutine_fn v9fs_create(void *opaque) 210560ce86c7SWei Liu { 210660ce86c7SWei Liu int32_t fid; 210760ce86c7SWei Liu int err = 0; 210860ce86c7SWei Liu size_t offset = 7; 210960ce86c7SWei Liu V9fsFidState *fidp; 211060ce86c7SWei Liu V9fsQID qid; 211160ce86c7SWei Liu int32_t perm; 211260ce86c7SWei Liu int8_t mode; 211360ce86c7SWei Liu V9fsPath path; 211460ce86c7SWei Liu struct stat stbuf; 211560ce86c7SWei Liu V9fsString name; 211660ce86c7SWei Liu V9fsString extension; 211760ce86c7SWei Liu int iounit; 211860ce86c7SWei Liu V9fsPDU *pdu = opaque; 211960ce86c7SWei Liu 212060ce86c7SWei Liu v9fs_path_init(&path); 212160ce86c7SWei Liu v9fs_string_init(&name); 212260ce86c7SWei Liu v9fs_string_init(&extension); 212360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 212460ce86c7SWei Liu &perm, &mode, &extension); 212560ce86c7SWei Liu if (err < 0) { 212660ce86c7SWei Liu goto out_nofid; 212760ce86c7SWei Liu } 212860ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 212960ce86c7SWei Liu 2130fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2131fff39a7aSGreg Kurz err = -ENOENT; 2132fff39a7aSGreg Kurz goto out_nofid; 2133fff39a7aSGreg Kurz } 2134fff39a7aSGreg Kurz 2135805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2136805b5d98SGreg Kurz err = -EEXIST; 2137805b5d98SGreg Kurz goto out_nofid; 2138805b5d98SGreg Kurz } 2139805b5d98SGreg Kurz 214060ce86c7SWei Liu fidp = get_fid(pdu, fid); 214160ce86c7SWei Liu if (fidp == NULL) { 214260ce86c7SWei Liu err = -EINVAL; 214360ce86c7SWei Liu goto out_nofid; 214460ce86c7SWei Liu } 214560ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 214660ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 214760ce86c7SWei Liu fidp->uid, -1, &stbuf); 214860ce86c7SWei Liu if (err < 0) { 214960ce86c7SWei Liu goto out; 215060ce86c7SWei Liu } 215160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 215260ce86c7SWei Liu if (err < 0) { 215360ce86c7SWei Liu goto out; 215460ce86c7SWei Liu } 215560ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 215660ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 215760ce86c7SWei Liu if (err < 0) { 215860ce86c7SWei Liu goto out; 215960ce86c7SWei Liu } 216060ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 216160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 216260ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 216360ce86c7SWei Liu extension.data, -1 , &stbuf); 216460ce86c7SWei Liu if (err < 0) { 216560ce86c7SWei Liu goto out; 216660ce86c7SWei Liu } 216760ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 216860ce86c7SWei Liu if (err < 0) { 216960ce86c7SWei Liu goto out; 217060ce86c7SWei Liu } 217160ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 217260ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 217360ce86c7SWei Liu int32_t ofid = atoi(extension.data); 217460ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 217560ce86c7SWei Liu if (ofidp == NULL) { 217660ce86c7SWei Liu err = -EINVAL; 217760ce86c7SWei Liu goto out; 217860ce86c7SWei Liu } 217960ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 218060ce86c7SWei Liu put_fid(pdu, ofidp); 218160ce86c7SWei Liu if (err < 0) { 218260ce86c7SWei Liu goto out; 218360ce86c7SWei Liu } 218460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 218560ce86c7SWei Liu if (err < 0) { 218660ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 218760ce86c7SWei Liu goto out; 218860ce86c7SWei Liu } 218960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 219060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 219160ce86c7SWei Liu if (err < 0) { 219260ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 219360ce86c7SWei Liu goto out; 219460ce86c7SWei Liu } 219560ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 219660ce86c7SWei Liu char ctype; 219760ce86c7SWei Liu uint32_t major, minor; 219860ce86c7SWei Liu mode_t nmode = 0; 219960ce86c7SWei Liu 220060ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 220160ce86c7SWei Liu err = -errno; 220260ce86c7SWei Liu goto out; 220360ce86c7SWei Liu } 220460ce86c7SWei Liu 220560ce86c7SWei Liu switch (ctype) { 220660ce86c7SWei Liu case 'c': 220760ce86c7SWei Liu nmode = S_IFCHR; 220860ce86c7SWei Liu break; 220960ce86c7SWei Liu case 'b': 221060ce86c7SWei Liu nmode = S_IFBLK; 221160ce86c7SWei Liu break; 221260ce86c7SWei Liu default: 221360ce86c7SWei Liu err = -EIO; 221460ce86c7SWei Liu goto out; 221560ce86c7SWei Liu } 221660ce86c7SWei Liu 221760ce86c7SWei Liu nmode |= perm & 0777; 221860ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 221960ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 222060ce86c7SWei Liu if (err < 0) { 222160ce86c7SWei Liu goto out; 222260ce86c7SWei Liu } 222360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 222460ce86c7SWei Liu if (err < 0) { 222560ce86c7SWei Liu goto out; 222660ce86c7SWei Liu } 222760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 222860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 222960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 223060ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 223160ce86c7SWei Liu if (err < 0) { 223260ce86c7SWei Liu goto out; 223360ce86c7SWei Liu } 223460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 223560ce86c7SWei Liu if (err < 0) { 223660ce86c7SWei Liu goto out; 223760ce86c7SWei Liu } 223860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 223960ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 224060ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 224160ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 224260ce86c7SWei Liu if (err < 0) { 224360ce86c7SWei Liu goto out; 224460ce86c7SWei Liu } 224560ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 224660ce86c7SWei Liu if (err < 0) { 224760ce86c7SWei Liu goto out; 224860ce86c7SWei Liu } 224960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 225060ce86c7SWei Liu } else { 225160ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 225260ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 225360ce86c7SWei Liu if (err < 0) { 225460ce86c7SWei Liu goto out; 225560ce86c7SWei Liu } 225660ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 225760ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 225860ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 225960ce86c7SWei Liu /* 226060ce86c7SWei Liu * We let the host file system do O_EXCL check 226160ce86c7SWei Liu * We should not reclaim such fd 226260ce86c7SWei Liu */ 226360ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 226460ce86c7SWei Liu } 226560ce86c7SWei Liu } 226660ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 226760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 226860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 226960ce86c7SWei Liu if (err < 0) { 227060ce86c7SWei Liu goto out; 227160ce86c7SWei Liu } 227260ce86c7SWei Liu err += offset; 227360ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 227460ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 227560ce86c7SWei Liu out: 227660ce86c7SWei Liu put_fid(pdu, fidp); 227760ce86c7SWei Liu out_nofid: 227860ce86c7SWei Liu pdu_complete(pdu, err); 227960ce86c7SWei Liu v9fs_string_free(&name); 228060ce86c7SWei Liu v9fs_string_free(&extension); 228160ce86c7SWei Liu v9fs_path_free(&path); 228260ce86c7SWei Liu } 228360ce86c7SWei Liu 22848440e22eSGreg Kurz static void coroutine_fn v9fs_symlink(void *opaque) 228560ce86c7SWei Liu { 228660ce86c7SWei Liu V9fsPDU *pdu = opaque; 228760ce86c7SWei Liu V9fsString name; 228860ce86c7SWei Liu V9fsString symname; 228960ce86c7SWei Liu V9fsFidState *dfidp; 229060ce86c7SWei Liu V9fsQID qid; 229160ce86c7SWei Liu struct stat stbuf; 229260ce86c7SWei Liu int32_t dfid; 229360ce86c7SWei Liu int err = 0; 229460ce86c7SWei Liu gid_t gid; 229560ce86c7SWei Liu size_t offset = 7; 229660ce86c7SWei Liu 229760ce86c7SWei Liu v9fs_string_init(&name); 229860ce86c7SWei Liu v9fs_string_init(&symname); 229960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 230060ce86c7SWei Liu if (err < 0) { 230160ce86c7SWei Liu goto out_nofid; 230260ce86c7SWei Liu } 230360ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 230460ce86c7SWei Liu 2305fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2306fff39a7aSGreg Kurz err = -ENOENT; 2307fff39a7aSGreg Kurz goto out_nofid; 2308fff39a7aSGreg Kurz } 2309fff39a7aSGreg Kurz 2310805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2311805b5d98SGreg Kurz err = -EEXIST; 2312805b5d98SGreg Kurz goto out_nofid; 2313805b5d98SGreg Kurz } 2314805b5d98SGreg Kurz 231560ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 231660ce86c7SWei Liu if (dfidp == NULL) { 231760ce86c7SWei Liu err = -EINVAL; 231860ce86c7SWei Liu goto out_nofid; 231960ce86c7SWei Liu } 232060ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 232160ce86c7SWei Liu if (err < 0) { 232260ce86c7SWei Liu goto out; 232360ce86c7SWei Liu } 232460ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 232560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 232660ce86c7SWei Liu if (err < 0) { 232760ce86c7SWei Liu goto out; 232860ce86c7SWei Liu } 232960ce86c7SWei Liu err += offset; 233060ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 233160ce86c7SWei Liu qid.type, qid.version, qid.path); 233260ce86c7SWei Liu out: 233360ce86c7SWei Liu put_fid(pdu, dfidp); 233460ce86c7SWei Liu out_nofid: 233560ce86c7SWei Liu pdu_complete(pdu, err); 233660ce86c7SWei Liu v9fs_string_free(&name); 233760ce86c7SWei Liu v9fs_string_free(&symname); 233860ce86c7SWei Liu } 233960ce86c7SWei Liu 2340a1bf8b74SGreg Kurz static void coroutine_fn v9fs_flush(void *opaque) 234160ce86c7SWei Liu { 234260ce86c7SWei Liu ssize_t err; 234360ce86c7SWei Liu int16_t tag; 234460ce86c7SWei Liu size_t offset = 7; 234560ce86c7SWei Liu V9fsPDU *cancel_pdu; 234660ce86c7SWei Liu V9fsPDU *pdu = opaque; 234760ce86c7SWei Liu V9fsState *s = pdu->s; 234860ce86c7SWei Liu 234960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 235060ce86c7SWei Liu if (err < 0) { 235160ce86c7SWei Liu pdu_complete(pdu, err); 235260ce86c7SWei Liu return; 235360ce86c7SWei Liu } 235460ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 235560ce86c7SWei Liu 235660ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 235760ce86c7SWei Liu if (cancel_pdu->tag == tag) { 235860ce86c7SWei Liu break; 235960ce86c7SWei Liu } 236060ce86c7SWei Liu } 236160ce86c7SWei Liu if (cancel_pdu) { 236260ce86c7SWei Liu cancel_pdu->cancelled = 1; 236360ce86c7SWei Liu /* 236460ce86c7SWei Liu * Wait for pdu to complete. 236560ce86c7SWei Liu */ 236660ce86c7SWei Liu qemu_co_queue_wait(&cancel_pdu->complete); 236760ce86c7SWei Liu cancel_pdu->cancelled = 0; 236860ce86c7SWei Liu pdu_free(cancel_pdu); 236960ce86c7SWei Liu } 237060ce86c7SWei Liu pdu_complete(pdu, 7); 237160ce86c7SWei Liu } 237260ce86c7SWei Liu 23738440e22eSGreg Kurz static void coroutine_fn v9fs_link(void *opaque) 237460ce86c7SWei Liu { 237560ce86c7SWei Liu V9fsPDU *pdu = opaque; 237660ce86c7SWei Liu int32_t dfid, oldfid; 237760ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 237860ce86c7SWei Liu V9fsString name; 237960ce86c7SWei Liu size_t offset = 7; 238060ce86c7SWei Liu int err = 0; 238160ce86c7SWei Liu 238260ce86c7SWei Liu v9fs_string_init(&name); 238360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 238460ce86c7SWei Liu if (err < 0) { 238560ce86c7SWei Liu goto out_nofid; 238660ce86c7SWei Liu } 238760ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 238860ce86c7SWei Liu 2389fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2390fff39a7aSGreg Kurz err = -ENOENT; 2391fff39a7aSGreg Kurz goto out_nofid; 2392fff39a7aSGreg Kurz } 2393fff39a7aSGreg Kurz 2394805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2395805b5d98SGreg Kurz err = -EEXIST; 2396805b5d98SGreg Kurz goto out_nofid; 2397805b5d98SGreg Kurz } 2398805b5d98SGreg Kurz 239960ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 240060ce86c7SWei Liu if (dfidp == NULL) { 240160ce86c7SWei Liu err = -ENOENT; 240260ce86c7SWei Liu goto out_nofid; 240360ce86c7SWei Liu } 240460ce86c7SWei Liu 240560ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 240660ce86c7SWei Liu if (oldfidp == NULL) { 240760ce86c7SWei Liu err = -ENOENT; 240860ce86c7SWei Liu goto out; 240960ce86c7SWei Liu } 241060ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 241160ce86c7SWei Liu if (!err) { 241260ce86c7SWei Liu err = offset; 241360ce86c7SWei Liu } 24144c158678SLi Qiang put_fid(pdu, oldfidp); 241560ce86c7SWei Liu out: 241660ce86c7SWei Liu put_fid(pdu, dfidp); 241760ce86c7SWei Liu out_nofid: 241860ce86c7SWei Liu v9fs_string_free(&name); 241960ce86c7SWei Liu pdu_complete(pdu, err); 242060ce86c7SWei Liu } 242160ce86c7SWei Liu 242260ce86c7SWei Liu /* Only works with path name based fid */ 24238440e22eSGreg Kurz static void coroutine_fn v9fs_remove(void *opaque) 242460ce86c7SWei Liu { 242560ce86c7SWei Liu int32_t fid; 242660ce86c7SWei Liu int err = 0; 242760ce86c7SWei Liu size_t offset = 7; 242860ce86c7SWei Liu V9fsFidState *fidp; 242960ce86c7SWei Liu V9fsPDU *pdu = opaque; 243060ce86c7SWei Liu 243160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 243260ce86c7SWei Liu if (err < 0) { 243360ce86c7SWei Liu goto out_nofid; 243460ce86c7SWei Liu } 243560ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 243660ce86c7SWei Liu 243760ce86c7SWei Liu fidp = get_fid(pdu, fid); 243860ce86c7SWei Liu if (fidp == NULL) { 243960ce86c7SWei Liu err = -EINVAL; 244060ce86c7SWei Liu goto out_nofid; 244160ce86c7SWei Liu } 244260ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 244360ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 244460ce86c7SWei Liu err = -EOPNOTSUPP; 244560ce86c7SWei Liu goto out_err; 244660ce86c7SWei Liu } 244760ce86c7SWei Liu /* 244860ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 244960ce86c7SWei Liu * the file later. So don't reclaim fd 245060ce86c7SWei Liu */ 245160ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 245260ce86c7SWei Liu if (err < 0) { 245360ce86c7SWei Liu goto out_err; 245460ce86c7SWei Liu } 245560ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 245660ce86c7SWei Liu if (!err) { 245760ce86c7SWei Liu err = offset; 245860ce86c7SWei Liu } 245960ce86c7SWei Liu out_err: 246060ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 246160ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 246260ce86c7SWei Liu put_fid(pdu, fidp); 246360ce86c7SWei Liu out_nofid: 246460ce86c7SWei Liu pdu_complete(pdu, err); 246560ce86c7SWei Liu } 246660ce86c7SWei Liu 24678440e22eSGreg Kurz static void coroutine_fn v9fs_unlinkat(void *opaque) 246860ce86c7SWei Liu { 246960ce86c7SWei Liu int err = 0; 247060ce86c7SWei Liu V9fsString name; 247160ce86c7SWei Liu int32_t dfid, flags; 247260ce86c7SWei Liu size_t offset = 7; 247360ce86c7SWei Liu V9fsPath path; 247460ce86c7SWei Liu V9fsFidState *dfidp; 247560ce86c7SWei Liu V9fsPDU *pdu = opaque; 247660ce86c7SWei Liu 247760ce86c7SWei Liu v9fs_string_init(&name); 247860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 247960ce86c7SWei Liu if (err < 0) { 248060ce86c7SWei Liu goto out_nofid; 248160ce86c7SWei Liu } 2482fff39a7aSGreg Kurz 2483fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2484fff39a7aSGreg Kurz err = -ENOENT; 2485fff39a7aSGreg Kurz goto out_nofid; 2486fff39a7aSGreg Kurz } 2487fff39a7aSGreg Kurz 2488805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2489805b5d98SGreg Kurz err = -EINVAL; 2490805b5d98SGreg Kurz goto out_nofid; 2491805b5d98SGreg Kurz } 2492805b5d98SGreg Kurz 2493805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2494805b5d98SGreg Kurz err = -ENOTEMPTY; 2495805b5d98SGreg Kurz goto out_nofid; 2496805b5d98SGreg Kurz } 2497805b5d98SGreg Kurz 249860ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 249960ce86c7SWei Liu if (dfidp == NULL) { 250060ce86c7SWei Liu err = -EINVAL; 250160ce86c7SWei Liu goto out_nofid; 250260ce86c7SWei Liu } 250360ce86c7SWei Liu /* 250460ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 250560ce86c7SWei Liu * the file later. So don't reclaim fd 250660ce86c7SWei Liu */ 250760ce86c7SWei Liu v9fs_path_init(&path); 250860ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 250960ce86c7SWei Liu if (err < 0) { 251060ce86c7SWei Liu goto out_err; 251160ce86c7SWei Liu } 251260ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 251360ce86c7SWei Liu if (err < 0) { 251460ce86c7SWei Liu goto out_err; 251560ce86c7SWei Liu } 251660ce86c7SWei Liu err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); 251760ce86c7SWei Liu if (!err) { 251860ce86c7SWei Liu err = offset; 251960ce86c7SWei Liu } 252060ce86c7SWei Liu out_err: 252160ce86c7SWei Liu put_fid(pdu, dfidp); 252260ce86c7SWei Liu v9fs_path_free(&path); 252360ce86c7SWei Liu out_nofid: 252460ce86c7SWei Liu pdu_complete(pdu, err); 252560ce86c7SWei Liu v9fs_string_free(&name); 252660ce86c7SWei Liu } 252760ce86c7SWei Liu 252860ce86c7SWei Liu 252960ce86c7SWei Liu /* Only works with path name based fid */ 25308440e22eSGreg Kurz static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 25318440e22eSGreg Kurz int32_t newdirfid, 25328440e22eSGreg Kurz V9fsString *name) 253360ce86c7SWei Liu { 253460ce86c7SWei Liu char *end; 253560ce86c7SWei Liu int err = 0; 253660ce86c7SWei Liu V9fsPath new_path; 253760ce86c7SWei Liu V9fsFidState *tfidp; 253860ce86c7SWei Liu V9fsState *s = pdu->s; 253960ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 254060ce86c7SWei Liu char *old_name, *new_name; 254160ce86c7SWei Liu 254260ce86c7SWei Liu v9fs_path_init(&new_path); 254360ce86c7SWei Liu if (newdirfid != -1) { 254460ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 254560ce86c7SWei Liu if (dirfidp == NULL) { 254660ce86c7SWei Liu err = -ENOENT; 254760ce86c7SWei Liu goto out_nofid; 254860ce86c7SWei Liu } 254949dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 255049dd946bSGreg Kurz err = -EINVAL; 255149dd946bSGreg Kurz goto out; 255249dd946bSGreg Kurz } 255360ce86c7SWei Liu v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 255460ce86c7SWei Liu } else { 255560ce86c7SWei Liu old_name = fidp->path.data; 255660ce86c7SWei Liu end = strrchr(old_name, '/'); 255760ce86c7SWei Liu if (end) { 255860ce86c7SWei Liu end++; 255960ce86c7SWei Liu } else { 256060ce86c7SWei Liu end = old_name; 256160ce86c7SWei Liu } 256260ce86c7SWei Liu new_name = g_malloc0(end - old_name + name->size + 1); 256360ce86c7SWei Liu strncat(new_name, old_name, end - old_name); 256460ce86c7SWei Liu strncat(new_name + (end - old_name), name->data, name->size); 256560ce86c7SWei Liu v9fs_co_name_to_path(pdu, NULL, new_name, &new_path); 256660ce86c7SWei Liu g_free(new_name); 256760ce86c7SWei Liu } 256860ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 256960ce86c7SWei Liu if (err < 0) { 257060ce86c7SWei Liu goto out; 257160ce86c7SWei Liu } 257260ce86c7SWei Liu /* 257360ce86c7SWei Liu * Fixup fid's pointing to the old name to 257460ce86c7SWei Liu * start pointing to the new name 257560ce86c7SWei Liu */ 257660ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 257760ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 257860ce86c7SWei Liu /* replace the name */ 257960ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 258060ce86c7SWei Liu } 258160ce86c7SWei Liu } 258260ce86c7SWei Liu out: 258360ce86c7SWei Liu if (dirfidp) { 258460ce86c7SWei Liu put_fid(pdu, dirfidp); 258560ce86c7SWei Liu } 258660ce86c7SWei Liu v9fs_path_free(&new_path); 258760ce86c7SWei Liu out_nofid: 258860ce86c7SWei Liu return err; 258960ce86c7SWei Liu } 259060ce86c7SWei Liu 259160ce86c7SWei Liu /* Only works with path name based fid */ 25928440e22eSGreg Kurz static void coroutine_fn v9fs_rename(void *opaque) 259360ce86c7SWei Liu { 259460ce86c7SWei Liu int32_t fid; 259560ce86c7SWei Liu ssize_t err = 0; 259660ce86c7SWei Liu size_t offset = 7; 259760ce86c7SWei Liu V9fsString name; 259860ce86c7SWei Liu int32_t newdirfid; 259960ce86c7SWei Liu V9fsFidState *fidp; 260060ce86c7SWei Liu V9fsPDU *pdu = opaque; 260160ce86c7SWei Liu V9fsState *s = pdu->s; 260260ce86c7SWei Liu 260360ce86c7SWei Liu v9fs_string_init(&name); 260460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 260560ce86c7SWei Liu if (err < 0) { 260660ce86c7SWei Liu goto out_nofid; 260760ce86c7SWei Liu } 2608fff39a7aSGreg Kurz 2609fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2610fff39a7aSGreg Kurz err = -ENOENT; 2611fff39a7aSGreg Kurz goto out_nofid; 2612fff39a7aSGreg Kurz } 2613fff39a7aSGreg Kurz 2614805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2615805b5d98SGreg Kurz err = -EISDIR; 2616805b5d98SGreg Kurz goto out_nofid; 2617805b5d98SGreg Kurz } 2618805b5d98SGreg Kurz 261960ce86c7SWei Liu fidp = get_fid(pdu, fid); 262060ce86c7SWei Liu if (fidp == NULL) { 262160ce86c7SWei Liu err = -ENOENT; 262260ce86c7SWei Liu goto out_nofid; 262360ce86c7SWei Liu } 262449dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 262549dd946bSGreg Kurz err = -EINVAL; 262649dd946bSGreg Kurz goto out; 262749dd946bSGreg Kurz } 262860ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 262960ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 263060ce86c7SWei Liu err = -EOPNOTSUPP; 263160ce86c7SWei Liu goto out; 263260ce86c7SWei Liu } 263360ce86c7SWei Liu v9fs_path_write_lock(s); 263460ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 263560ce86c7SWei Liu v9fs_path_unlock(s); 263660ce86c7SWei Liu if (!err) { 263760ce86c7SWei Liu err = offset; 263860ce86c7SWei Liu } 263960ce86c7SWei Liu out: 264060ce86c7SWei Liu put_fid(pdu, fidp); 264160ce86c7SWei Liu out_nofid: 264260ce86c7SWei Liu pdu_complete(pdu, err); 264360ce86c7SWei Liu v9fs_string_free(&name); 264460ce86c7SWei Liu } 264560ce86c7SWei Liu 26468440e22eSGreg Kurz static void coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 26478440e22eSGreg Kurz V9fsString *old_name, 26488440e22eSGreg Kurz V9fsPath *newdir, 264960ce86c7SWei Liu V9fsString *new_name) 265060ce86c7SWei Liu { 265160ce86c7SWei Liu V9fsFidState *tfidp; 265260ce86c7SWei Liu V9fsPath oldpath, newpath; 265360ce86c7SWei Liu V9fsState *s = pdu->s; 265460ce86c7SWei Liu 265560ce86c7SWei Liu 265660ce86c7SWei Liu v9fs_path_init(&oldpath); 265760ce86c7SWei Liu v9fs_path_init(&newpath); 265860ce86c7SWei Liu v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 265960ce86c7SWei Liu v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 266060ce86c7SWei Liu 266160ce86c7SWei Liu /* 266260ce86c7SWei Liu * Fixup fid's pointing to the old name to 266360ce86c7SWei Liu * start pointing to the new name 266460ce86c7SWei Liu */ 266560ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 266660ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 266760ce86c7SWei Liu /* replace the name */ 266860ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 266960ce86c7SWei Liu } 267060ce86c7SWei Liu } 267160ce86c7SWei Liu v9fs_path_free(&oldpath); 267260ce86c7SWei Liu v9fs_path_free(&newpath); 267360ce86c7SWei Liu } 267460ce86c7SWei Liu 26758440e22eSGreg Kurz static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 26768440e22eSGreg Kurz V9fsString *old_name, 26778440e22eSGreg Kurz int32_t newdirfid, 267860ce86c7SWei Liu V9fsString *new_name) 267960ce86c7SWei Liu { 268060ce86c7SWei Liu int err = 0; 268160ce86c7SWei Liu V9fsState *s = pdu->s; 268260ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 268360ce86c7SWei Liu 268460ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 268560ce86c7SWei Liu if (olddirfidp == NULL) { 268660ce86c7SWei Liu err = -ENOENT; 268760ce86c7SWei Liu goto out; 268860ce86c7SWei Liu } 268960ce86c7SWei Liu if (newdirfid != -1) { 269060ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 269160ce86c7SWei Liu if (newdirfidp == NULL) { 269260ce86c7SWei Liu err = -ENOENT; 269360ce86c7SWei Liu goto out; 269460ce86c7SWei Liu } 269560ce86c7SWei Liu } else { 269660ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 269760ce86c7SWei Liu } 269860ce86c7SWei Liu 269960ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 270060ce86c7SWei Liu &newdirfidp->path, new_name); 270160ce86c7SWei Liu if (err < 0) { 270260ce86c7SWei Liu goto out; 270360ce86c7SWei Liu } 270460ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 270560ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 270660ce86c7SWei Liu v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 270760ce86c7SWei Liu &newdirfidp->path, new_name); 270860ce86c7SWei Liu } 270960ce86c7SWei Liu out: 271060ce86c7SWei Liu if (olddirfidp) { 271160ce86c7SWei Liu put_fid(pdu, olddirfidp); 271260ce86c7SWei Liu } 271360ce86c7SWei Liu if (newdirfidp) { 271460ce86c7SWei Liu put_fid(pdu, newdirfidp); 271560ce86c7SWei Liu } 271660ce86c7SWei Liu return err; 271760ce86c7SWei Liu } 271860ce86c7SWei Liu 27198440e22eSGreg Kurz static void coroutine_fn v9fs_renameat(void *opaque) 272060ce86c7SWei Liu { 272160ce86c7SWei Liu ssize_t err = 0; 272260ce86c7SWei Liu size_t offset = 7; 272360ce86c7SWei Liu V9fsPDU *pdu = opaque; 272460ce86c7SWei Liu V9fsState *s = pdu->s; 272560ce86c7SWei Liu int32_t olddirfid, newdirfid; 272660ce86c7SWei Liu V9fsString old_name, new_name; 272760ce86c7SWei Liu 272860ce86c7SWei Liu v9fs_string_init(&old_name); 272960ce86c7SWei Liu v9fs_string_init(&new_name); 273060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 273160ce86c7SWei Liu &old_name, &newdirfid, &new_name); 273260ce86c7SWei Liu if (err < 0) { 273360ce86c7SWei Liu goto out_err; 273460ce86c7SWei Liu } 273560ce86c7SWei Liu 2736fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 2737fff39a7aSGreg Kurz err = -ENOENT; 2738fff39a7aSGreg Kurz goto out_err; 2739fff39a7aSGreg Kurz } 2740fff39a7aSGreg Kurz 2741805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 2742805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 2743805b5d98SGreg Kurz err = -EISDIR; 2744805b5d98SGreg Kurz goto out_err; 2745805b5d98SGreg Kurz } 2746805b5d98SGreg Kurz 274760ce86c7SWei Liu v9fs_path_write_lock(s); 274860ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 274960ce86c7SWei Liu &old_name, newdirfid, &new_name); 275060ce86c7SWei Liu v9fs_path_unlock(s); 275160ce86c7SWei Liu if (!err) { 275260ce86c7SWei Liu err = offset; 275360ce86c7SWei Liu } 275460ce86c7SWei Liu 275560ce86c7SWei Liu out_err: 275660ce86c7SWei Liu pdu_complete(pdu, err); 275760ce86c7SWei Liu v9fs_string_free(&old_name); 275860ce86c7SWei Liu v9fs_string_free(&new_name); 275960ce86c7SWei Liu } 276060ce86c7SWei Liu 27618440e22eSGreg Kurz static void coroutine_fn v9fs_wstat(void *opaque) 276260ce86c7SWei Liu { 276360ce86c7SWei Liu int32_t fid; 276460ce86c7SWei Liu int err = 0; 276560ce86c7SWei Liu int16_t unused; 276660ce86c7SWei Liu V9fsStat v9stat; 276760ce86c7SWei Liu size_t offset = 7; 276860ce86c7SWei Liu struct stat stbuf; 276960ce86c7SWei Liu V9fsFidState *fidp; 277060ce86c7SWei Liu V9fsPDU *pdu = opaque; 277160ce86c7SWei Liu 277260ce86c7SWei Liu v9fs_stat_init(&v9stat); 277360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 277460ce86c7SWei Liu if (err < 0) { 277560ce86c7SWei Liu goto out_nofid; 277660ce86c7SWei Liu } 277760ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 277860ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 277960ce86c7SWei Liu 278060ce86c7SWei Liu fidp = get_fid(pdu, fid); 278160ce86c7SWei Liu if (fidp == NULL) { 278260ce86c7SWei Liu err = -EINVAL; 278360ce86c7SWei Liu goto out_nofid; 278460ce86c7SWei Liu } 278560ce86c7SWei Liu /* do we need to sync the file? */ 278660ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 278760ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 278860ce86c7SWei Liu goto out; 278960ce86c7SWei Liu } 279060ce86c7SWei Liu if (v9stat.mode != -1) { 279160ce86c7SWei Liu uint32_t v9_mode; 279260ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 279360ce86c7SWei Liu if (err < 0) { 279460ce86c7SWei Liu goto out; 279560ce86c7SWei Liu } 279660ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 279760ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 279860ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 279960ce86c7SWei Liu /* Attempting to change the type */ 280060ce86c7SWei Liu err = -EIO; 280160ce86c7SWei Liu goto out; 280260ce86c7SWei Liu } 280360ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 280460ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 280560ce86c7SWei Liu &v9stat.extension)); 280660ce86c7SWei Liu if (err < 0) { 280760ce86c7SWei Liu goto out; 280860ce86c7SWei Liu } 280960ce86c7SWei Liu } 281060ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 281160ce86c7SWei Liu struct timespec times[2]; 281260ce86c7SWei Liu if (v9stat.atime != -1) { 281360ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 281460ce86c7SWei Liu times[0].tv_nsec = 0; 281560ce86c7SWei Liu } else { 281660ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 281760ce86c7SWei Liu } 281860ce86c7SWei Liu if (v9stat.mtime != -1) { 281960ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 282060ce86c7SWei Liu times[1].tv_nsec = 0; 282160ce86c7SWei Liu } else { 282260ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 282360ce86c7SWei Liu } 282460ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 282560ce86c7SWei Liu if (err < 0) { 282660ce86c7SWei Liu goto out; 282760ce86c7SWei Liu } 282860ce86c7SWei Liu } 282960ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 283060ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 283160ce86c7SWei Liu if (err < 0) { 283260ce86c7SWei Liu goto out; 283360ce86c7SWei Liu } 283460ce86c7SWei Liu } 283560ce86c7SWei Liu if (v9stat.name.size != 0) { 283660ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 283760ce86c7SWei Liu if (err < 0) { 283860ce86c7SWei Liu goto out; 283960ce86c7SWei Liu } 284060ce86c7SWei Liu } 284160ce86c7SWei Liu if (v9stat.length != -1) { 284260ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 284360ce86c7SWei Liu if (err < 0) { 284460ce86c7SWei Liu goto out; 284560ce86c7SWei Liu } 284660ce86c7SWei Liu } 284760ce86c7SWei Liu err = offset; 284860ce86c7SWei Liu out: 284960ce86c7SWei Liu put_fid(pdu, fidp); 285060ce86c7SWei Liu out_nofid: 285160ce86c7SWei Liu v9fs_stat_free(&v9stat); 285260ce86c7SWei Liu pdu_complete(pdu, err); 285360ce86c7SWei Liu } 285460ce86c7SWei Liu 285560ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 285660ce86c7SWei Liu { 285760ce86c7SWei Liu uint32_t f_type; 285860ce86c7SWei Liu uint32_t f_bsize; 285960ce86c7SWei Liu uint64_t f_blocks; 286060ce86c7SWei Liu uint64_t f_bfree; 286160ce86c7SWei Liu uint64_t f_bavail; 286260ce86c7SWei Liu uint64_t f_files; 286360ce86c7SWei Liu uint64_t f_ffree; 286460ce86c7SWei Liu uint64_t fsid_val; 286560ce86c7SWei Liu uint32_t f_namelen; 286660ce86c7SWei Liu size_t offset = 7; 286760ce86c7SWei Liu int32_t bsize_factor; 286860ce86c7SWei Liu 286960ce86c7SWei Liu /* 287060ce86c7SWei Liu * compute bsize factor based on host file system block size 287160ce86c7SWei Liu * and client msize 287260ce86c7SWei Liu */ 287360ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 287460ce86c7SWei Liu if (!bsize_factor) { 287560ce86c7SWei Liu bsize_factor = 1; 287660ce86c7SWei Liu } 287760ce86c7SWei Liu f_type = stbuf->f_type; 287860ce86c7SWei Liu f_bsize = stbuf->f_bsize; 287960ce86c7SWei Liu f_bsize *= bsize_factor; 288060ce86c7SWei Liu /* 288160ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 288260ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 288360ce86c7SWei Liu * blocks by bsize factor 288460ce86c7SWei Liu */ 288560ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 288660ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 288760ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 288860ce86c7SWei Liu f_files = stbuf->f_files; 288960ce86c7SWei Liu f_ffree = stbuf->f_ffree; 289060ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 289160ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 289260ce86c7SWei Liu f_namelen = stbuf->f_namelen; 289360ce86c7SWei Liu 289460ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 289560ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 289660ce86c7SWei Liu f_bavail, f_files, f_ffree, 289760ce86c7SWei Liu fsid_val, f_namelen); 289860ce86c7SWei Liu } 289960ce86c7SWei Liu 29008440e22eSGreg Kurz static void coroutine_fn v9fs_statfs(void *opaque) 290160ce86c7SWei Liu { 290260ce86c7SWei Liu int32_t fid; 290360ce86c7SWei Liu ssize_t retval = 0; 290460ce86c7SWei Liu size_t offset = 7; 290560ce86c7SWei Liu V9fsFidState *fidp; 290660ce86c7SWei Liu struct statfs stbuf; 290760ce86c7SWei Liu V9fsPDU *pdu = opaque; 290860ce86c7SWei Liu V9fsState *s = pdu->s; 290960ce86c7SWei Liu 291060ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 291160ce86c7SWei Liu if (retval < 0) { 291260ce86c7SWei Liu goto out_nofid; 291360ce86c7SWei Liu } 291460ce86c7SWei Liu fidp = get_fid(pdu, fid); 291560ce86c7SWei Liu if (fidp == NULL) { 291660ce86c7SWei Liu retval = -ENOENT; 291760ce86c7SWei Liu goto out_nofid; 291860ce86c7SWei Liu } 291960ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 292060ce86c7SWei Liu if (retval < 0) { 292160ce86c7SWei Liu goto out; 292260ce86c7SWei Liu } 292360ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 292460ce86c7SWei Liu if (retval < 0) { 292560ce86c7SWei Liu goto out; 292660ce86c7SWei Liu } 292760ce86c7SWei Liu retval += offset; 292860ce86c7SWei Liu out: 292960ce86c7SWei Liu put_fid(pdu, fidp); 293060ce86c7SWei Liu out_nofid: 293160ce86c7SWei Liu pdu_complete(pdu, retval); 293260ce86c7SWei Liu } 293360ce86c7SWei Liu 29348440e22eSGreg Kurz static void coroutine_fn v9fs_mknod(void *opaque) 293560ce86c7SWei Liu { 293660ce86c7SWei Liu 293760ce86c7SWei Liu int mode; 293860ce86c7SWei Liu gid_t gid; 293960ce86c7SWei Liu int32_t fid; 294060ce86c7SWei Liu V9fsQID qid; 294160ce86c7SWei Liu int err = 0; 294260ce86c7SWei Liu int major, minor; 294360ce86c7SWei Liu size_t offset = 7; 294460ce86c7SWei Liu V9fsString name; 294560ce86c7SWei Liu struct stat stbuf; 294660ce86c7SWei Liu V9fsFidState *fidp; 294760ce86c7SWei Liu V9fsPDU *pdu = opaque; 294860ce86c7SWei Liu 294960ce86c7SWei Liu v9fs_string_init(&name); 295060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 295160ce86c7SWei Liu &major, &minor, &gid); 295260ce86c7SWei Liu if (err < 0) { 295360ce86c7SWei Liu goto out_nofid; 295460ce86c7SWei Liu } 295560ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 295660ce86c7SWei Liu 2957fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2958fff39a7aSGreg Kurz err = -ENOENT; 2959fff39a7aSGreg Kurz goto out_nofid; 2960fff39a7aSGreg Kurz } 2961fff39a7aSGreg Kurz 2962805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2963805b5d98SGreg Kurz err = -EEXIST; 2964805b5d98SGreg Kurz goto out_nofid; 2965805b5d98SGreg Kurz } 2966805b5d98SGreg Kurz 296760ce86c7SWei Liu fidp = get_fid(pdu, fid); 296860ce86c7SWei Liu if (fidp == NULL) { 296960ce86c7SWei Liu err = -ENOENT; 297060ce86c7SWei Liu goto out_nofid; 297160ce86c7SWei Liu } 297260ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 297360ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 297460ce86c7SWei Liu if (err < 0) { 297560ce86c7SWei Liu goto out; 297660ce86c7SWei Liu } 297760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 297860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 297960ce86c7SWei Liu if (err < 0) { 298060ce86c7SWei Liu goto out; 298160ce86c7SWei Liu } 298260ce86c7SWei Liu err += offset; 298360ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 298460ce86c7SWei Liu qid.type, qid.version, qid.path); 298560ce86c7SWei Liu out: 298660ce86c7SWei Liu put_fid(pdu, fidp); 298760ce86c7SWei Liu out_nofid: 298860ce86c7SWei Liu pdu_complete(pdu, err); 298960ce86c7SWei Liu v9fs_string_free(&name); 299060ce86c7SWei Liu } 299160ce86c7SWei Liu 299260ce86c7SWei Liu /* 299360ce86c7SWei Liu * Implement posix byte range locking code 299460ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 299560ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 299660ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 299760ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 299860ce86c7SWei Liu * So when a TLOCK request comes, always return success 299960ce86c7SWei Liu */ 30008440e22eSGreg Kurz static void coroutine_fn v9fs_lock(void *opaque) 300160ce86c7SWei Liu { 300260ce86c7SWei Liu int8_t status; 300360ce86c7SWei Liu V9fsFlock flock; 300460ce86c7SWei Liu size_t offset = 7; 300560ce86c7SWei Liu struct stat stbuf; 300660ce86c7SWei Liu V9fsFidState *fidp; 300760ce86c7SWei Liu int32_t fid, err = 0; 300860ce86c7SWei Liu V9fsPDU *pdu = opaque; 300960ce86c7SWei Liu 301060ce86c7SWei Liu status = P9_LOCK_ERROR; 301160ce86c7SWei Liu v9fs_string_init(&flock.client_id); 301260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 301360ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 301460ce86c7SWei Liu &flock.proc_id, &flock.client_id); 301560ce86c7SWei Liu if (err < 0) { 301660ce86c7SWei Liu goto out_nofid; 301760ce86c7SWei Liu } 301860ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 301960ce86c7SWei Liu flock.type, flock.start, flock.length); 302060ce86c7SWei Liu 302160ce86c7SWei Liu 302260ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 302360ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 302460ce86c7SWei Liu err = -EINVAL; 302560ce86c7SWei Liu goto out_nofid; 302660ce86c7SWei Liu } 302760ce86c7SWei Liu fidp = get_fid(pdu, fid); 302860ce86c7SWei Liu if (fidp == NULL) { 302960ce86c7SWei Liu err = -ENOENT; 303060ce86c7SWei Liu goto out_nofid; 303160ce86c7SWei Liu } 303260ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 303360ce86c7SWei Liu if (err < 0) { 303460ce86c7SWei Liu goto out; 303560ce86c7SWei Liu } 303660ce86c7SWei Liu status = P9_LOCK_SUCCESS; 303760ce86c7SWei Liu out: 303860ce86c7SWei Liu put_fid(pdu, fidp); 303960ce86c7SWei Liu out_nofid: 304060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "b", status); 304160ce86c7SWei Liu if (err > 0) { 304260ce86c7SWei Liu err += offset; 304360ce86c7SWei Liu } 304460ce86c7SWei Liu trace_v9fs_lock_return(pdu->tag, pdu->id, status); 304560ce86c7SWei Liu pdu_complete(pdu, err); 304660ce86c7SWei Liu v9fs_string_free(&flock.client_id); 304760ce86c7SWei Liu } 304860ce86c7SWei Liu 304960ce86c7SWei Liu /* 305060ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 305160ce86c7SWei Liu * handling is done by client's VFS layer. 305260ce86c7SWei Liu */ 30538440e22eSGreg Kurz static void coroutine_fn v9fs_getlock(void *opaque) 305460ce86c7SWei Liu { 305560ce86c7SWei Liu size_t offset = 7; 305660ce86c7SWei Liu struct stat stbuf; 305760ce86c7SWei Liu V9fsFidState *fidp; 305860ce86c7SWei Liu V9fsGetlock glock; 305960ce86c7SWei Liu int32_t fid, err = 0; 306060ce86c7SWei Liu V9fsPDU *pdu = opaque; 306160ce86c7SWei Liu 306260ce86c7SWei Liu v9fs_string_init(&glock.client_id); 306360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 306460ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 306560ce86c7SWei Liu &glock.client_id); 306660ce86c7SWei Liu if (err < 0) { 306760ce86c7SWei Liu goto out_nofid; 306860ce86c7SWei Liu } 306960ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 307060ce86c7SWei Liu glock.type, glock.start, glock.length); 307160ce86c7SWei Liu 307260ce86c7SWei Liu fidp = get_fid(pdu, fid); 307360ce86c7SWei Liu if (fidp == NULL) { 307460ce86c7SWei Liu err = -ENOENT; 307560ce86c7SWei Liu goto out_nofid; 307660ce86c7SWei Liu } 307760ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 307860ce86c7SWei Liu if (err < 0) { 307960ce86c7SWei Liu goto out; 308060ce86c7SWei Liu } 308160ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 308260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 308360ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 308460ce86c7SWei Liu &glock.client_id); 308560ce86c7SWei Liu if (err < 0) { 308660ce86c7SWei Liu goto out; 308760ce86c7SWei Liu } 308860ce86c7SWei Liu err += offset; 308960ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 309060ce86c7SWei Liu glock.length, glock.proc_id); 309160ce86c7SWei Liu out: 309260ce86c7SWei Liu put_fid(pdu, fidp); 309360ce86c7SWei Liu out_nofid: 309460ce86c7SWei Liu pdu_complete(pdu, err); 309560ce86c7SWei Liu v9fs_string_free(&glock.client_id); 309660ce86c7SWei Liu } 309760ce86c7SWei Liu 30988440e22eSGreg Kurz static void coroutine_fn v9fs_mkdir(void *opaque) 309960ce86c7SWei Liu { 310060ce86c7SWei Liu V9fsPDU *pdu = opaque; 310160ce86c7SWei Liu size_t offset = 7; 310260ce86c7SWei Liu int32_t fid; 310360ce86c7SWei Liu struct stat stbuf; 310460ce86c7SWei Liu V9fsQID qid; 310560ce86c7SWei Liu V9fsString name; 310660ce86c7SWei Liu V9fsFidState *fidp; 310760ce86c7SWei Liu gid_t gid; 310860ce86c7SWei Liu int mode; 310960ce86c7SWei Liu int err = 0; 311060ce86c7SWei Liu 311160ce86c7SWei Liu v9fs_string_init(&name); 311260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 311360ce86c7SWei Liu if (err < 0) { 311460ce86c7SWei Liu goto out_nofid; 311560ce86c7SWei Liu } 311660ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 311760ce86c7SWei Liu 3118fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3119fff39a7aSGreg Kurz err = -ENOENT; 3120fff39a7aSGreg Kurz goto out_nofid; 3121fff39a7aSGreg Kurz } 3122fff39a7aSGreg Kurz 3123805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3124805b5d98SGreg Kurz err = -EEXIST; 3125805b5d98SGreg Kurz goto out_nofid; 3126805b5d98SGreg Kurz } 3127805b5d98SGreg Kurz 312860ce86c7SWei Liu fidp = get_fid(pdu, fid); 312960ce86c7SWei Liu if (fidp == NULL) { 313060ce86c7SWei Liu err = -ENOENT; 313160ce86c7SWei Liu goto out_nofid; 313260ce86c7SWei Liu } 313360ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 313460ce86c7SWei Liu if (err < 0) { 313560ce86c7SWei Liu goto out; 313660ce86c7SWei Liu } 313760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 313860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 313960ce86c7SWei Liu if (err < 0) { 314060ce86c7SWei Liu goto out; 314160ce86c7SWei Liu } 314260ce86c7SWei Liu err += offset; 314360ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 314460ce86c7SWei Liu qid.type, qid.version, qid.path, err); 314560ce86c7SWei Liu out: 314660ce86c7SWei Liu put_fid(pdu, fidp); 314760ce86c7SWei Liu out_nofid: 314860ce86c7SWei Liu pdu_complete(pdu, err); 314960ce86c7SWei Liu v9fs_string_free(&name); 315060ce86c7SWei Liu } 315160ce86c7SWei Liu 31528440e22eSGreg Kurz static void coroutine_fn v9fs_xattrwalk(void *opaque) 315360ce86c7SWei Liu { 315460ce86c7SWei Liu int64_t size; 315560ce86c7SWei Liu V9fsString name; 315660ce86c7SWei Liu ssize_t err = 0; 315760ce86c7SWei Liu size_t offset = 7; 315860ce86c7SWei Liu int32_t fid, newfid; 315960ce86c7SWei Liu V9fsFidState *file_fidp; 316060ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 316160ce86c7SWei Liu V9fsPDU *pdu = opaque; 316260ce86c7SWei Liu V9fsState *s = pdu->s; 316360ce86c7SWei Liu 316460ce86c7SWei Liu v9fs_string_init(&name); 316560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 316660ce86c7SWei Liu if (err < 0) { 316760ce86c7SWei Liu goto out_nofid; 316860ce86c7SWei Liu } 316960ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 317060ce86c7SWei Liu 317160ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 317260ce86c7SWei Liu if (file_fidp == NULL) { 317360ce86c7SWei Liu err = -ENOENT; 317460ce86c7SWei Liu goto out_nofid; 317560ce86c7SWei Liu } 317660ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 317760ce86c7SWei Liu if (xattr_fidp == NULL) { 317860ce86c7SWei Liu err = -EINVAL; 317960ce86c7SWei Liu goto out; 318060ce86c7SWei Liu } 318160ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 3182ba42ebb8SLi Qiang if (!v9fs_string_size(&name)) { 318360ce86c7SWei Liu /* 318460ce86c7SWei Liu * listxattr request. Get the size first 318560ce86c7SWei Liu */ 318660ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 318760ce86c7SWei Liu if (size < 0) { 318860ce86c7SWei Liu err = size; 318960ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 319060ce86c7SWei Liu goto out; 319160ce86c7SWei Liu } 319260ce86c7SWei Liu /* 319360ce86c7SWei Liu * Read the xattr value 319460ce86c7SWei Liu */ 319560ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 319660ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3197dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 319860ce86c7SWei Liu if (size) { 319960ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 320060ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 320160ce86c7SWei Liu xattr_fidp->fs.xattr.value, 320260ce86c7SWei Liu xattr_fidp->fs.xattr.len); 320360ce86c7SWei Liu if (err < 0) { 320460ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 320560ce86c7SWei Liu goto out; 320660ce86c7SWei Liu } 320760ce86c7SWei Liu } 320860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 320960ce86c7SWei Liu if (err < 0) { 321060ce86c7SWei Liu goto out; 321160ce86c7SWei Liu } 321260ce86c7SWei Liu err += offset; 321360ce86c7SWei Liu } else { 321460ce86c7SWei Liu /* 321560ce86c7SWei Liu * specific xattr fid. We check for xattr 321660ce86c7SWei Liu * presence also collect the xattr size 321760ce86c7SWei Liu */ 321860ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 321960ce86c7SWei Liu &name, NULL, 0); 322060ce86c7SWei Liu if (size < 0) { 322160ce86c7SWei Liu err = size; 322260ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 322360ce86c7SWei Liu goto out; 322460ce86c7SWei Liu } 322560ce86c7SWei Liu /* 322660ce86c7SWei Liu * Read the xattr value 322760ce86c7SWei Liu */ 322860ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 322960ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3230dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 323160ce86c7SWei Liu if (size) { 323260ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 323360ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 323460ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 323560ce86c7SWei Liu xattr_fidp->fs.xattr.len); 323660ce86c7SWei Liu if (err < 0) { 323760ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 323860ce86c7SWei Liu goto out; 323960ce86c7SWei Liu } 324060ce86c7SWei Liu } 324160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 324260ce86c7SWei Liu if (err < 0) { 324360ce86c7SWei Liu goto out; 324460ce86c7SWei Liu } 324560ce86c7SWei Liu err += offset; 324660ce86c7SWei Liu } 324760ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 324860ce86c7SWei Liu out: 324960ce86c7SWei Liu put_fid(pdu, file_fidp); 325060ce86c7SWei Liu if (xattr_fidp) { 325160ce86c7SWei Liu put_fid(pdu, xattr_fidp); 325260ce86c7SWei Liu } 325360ce86c7SWei Liu out_nofid: 325460ce86c7SWei Liu pdu_complete(pdu, err); 325560ce86c7SWei Liu v9fs_string_free(&name); 325660ce86c7SWei Liu } 325760ce86c7SWei Liu 32588440e22eSGreg Kurz static void coroutine_fn v9fs_xattrcreate(void *opaque) 325960ce86c7SWei Liu { 326060ce86c7SWei Liu int flags; 326160ce86c7SWei Liu int32_t fid; 32623b79ef2cSGreg Kurz uint64_t size; 326360ce86c7SWei Liu ssize_t err = 0; 326460ce86c7SWei Liu V9fsString name; 326560ce86c7SWei Liu size_t offset = 7; 326660ce86c7SWei Liu V9fsFidState *file_fidp; 326760ce86c7SWei Liu V9fsFidState *xattr_fidp; 326860ce86c7SWei Liu V9fsPDU *pdu = opaque; 326960ce86c7SWei Liu 327060ce86c7SWei Liu v9fs_string_init(&name); 327160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 327260ce86c7SWei Liu if (err < 0) { 327360ce86c7SWei Liu goto out_nofid; 327460ce86c7SWei Liu } 327560ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 327660ce86c7SWei Liu 32773b79ef2cSGreg Kurz if (size > XATTR_SIZE_MAX) { 32783b79ef2cSGreg Kurz err = -E2BIG; 32793b79ef2cSGreg Kurz goto out_nofid; 32803b79ef2cSGreg Kurz } 32813b79ef2cSGreg Kurz 328260ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 328360ce86c7SWei Liu if (file_fidp == NULL) { 328460ce86c7SWei Liu err = -EINVAL; 328560ce86c7SWei Liu goto out_nofid; 328660ce86c7SWei Liu } 3287dd654e03SGreg Kurz if (file_fidp->fid_type != P9_FID_NONE) { 3288dd654e03SGreg Kurz err = -EINVAL; 3289dd654e03SGreg Kurz goto out_put_fid; 3290dd654e03SGreg Kurz } 3291dd654e03SGreg Kurz 329260ce86c7SWei Liu /* Make the file fid point to xattr */ 329360ce86c7SWei Liu xattr_fidp = file_fidp; 329460ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 329560ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 3296dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = false; 329760ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 329860ce86c7SWei Liu xattr_fidp->fs.xattr.flags = flags; 329960ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 330060ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 3301eb687602SLi Qiang xattr_fidp->fs.xattr.value = g_malloc0(size); 330260ce86c7SWei Liu err = offset; 3303dd654e03SGreg Kurz out_put_fid: 330460ce86c7SWei Liu put_fid(pdu, file_fidp); 330560ce86c7SWei Liu out_nofid: 330660ce86c7SWei Liu pdu_complete(pdu, err); 330760ce86c7SWei Liu v9fs_string_free(&name); 330860ce86c7SWei Liu } 330960ce86c7SWei Liu 33108440e22eSGreg Kurz static void coroutine_fn v9fs_readlink(void *opaque) 331160ce86c7SWei Liu { 331260ce86c7SWei Liu V9fsPDU *pdu = opaque; 331360ce86c7SWei Liu size_t offset = 7; 331460ce86c7SWei Liu V9fsString target; 331560ce86c7SWei Liu int32_t fid; 331660ce86c7SWei Liu int err = 0; 331760ce86c7SWei Liu V9fsFidState *fidp; 331860ce86c7SWei Liu 331960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 332060ce86c7SWei Liu if (err < 0) { 332160ce86c7SWei Liu goto out_nofid; 332260ce86c7SWei Liu } 332360ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 332460ce86c7SWei Liu fidp = get_fid(pdu, fid); 332560ce86c7SWei Liu if (fidp == NULL) { 332660ce86c7SWei Liu err = -ENOENT; 332760ce86c7SWei Liu goto out_nofid; 332860ce86c7SWei Liu } 332960ce86c7SWei Liu 333060ce86c7SWei Liu v9fs_string_init(&target); 333160ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 333260ce86c7SWei Liu if (err < 0) { 333360ce86c7SWei Liu goto out; 333460ce86c7SWei Liu } 333560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 333660ce86c7SWei Liu if (err < 0) { 333760ce86c7SWei Liu v9fs_string_free(&target); 333860ce86c7SWei Liu goto out; 333960ce86c7SWei Liu } 334060ce86c7SWei Liu err += offset; 334160ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 334260ce86c7SWei Liu v9fs_string_free(&target); 334360ce86c7SWei Liu out: 334460ce86c7SWei Liu put_fid(pdu, fidp); 334560ce86c7SWei Liu out_nofid: 334660ce86c7SWei Liu pdu_complete(pdu, err); 334760ce86c7SWei Liu } 334860ce86c7SWei Liu 334960ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 335060ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 335160ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 335260ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 335360ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 335460ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 335560ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 335660ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 335760ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 335860ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 335960ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 336060ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 336160ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 336260ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 336360ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 336460ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 336560ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 336660ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 336760ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 336860ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 336960ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 337060ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 337160ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 337260ce86c7SWei Liu [P9_TREAD] = v9fs_read, 337360ce86c7SWei Liu #if 0 337460ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 337560ce86c7SWei Liu #endif 337660ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 337760ce86c7SWei Liu [P9_TLINK] = v9fs_link, 337860ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 337960ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 338060ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 338160ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 338260ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 338360ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 338460ce86c7SWei Liu }; 338560ce86c7SWei Liu 33868440e22eSGreg Kurz static void coroutine_fn v9fs_op_not_supp(void *opaque) 338760ce86c7SWei Liu { 338860ce86c7SWei Liu V9fsPDU *pdu = opaque; 338960ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 339060ce86c7SWei Liu } 339160ce86c7SWei Liu 33928440e22eSGreg Kurz static void coroutine_fn v9fs_fs_ro(void *opaque) 339360ce86c7SWei Liu { 339460ce86c7SWei Liu V9fsPDU *pdu = opaque; 339560ce86c7SWei Liu pdu_complete(pdu, -EROFS); 339660ce86c7SWei Liu } 339760ce86c7SWei Liu 339860ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 339960ce86c7SWei Liu { 340060ce86c7SWei Liu switch (pdu->id) { 340160ce86c7SWei Liu case P9_TREADDIR: 340260ce86c7SWei Liu case P9_TSTATFS: 340360ce86c7SWei Liu case P9_TGETATTR: 340460ce86c7SWei Liu case P9_TXATTRWALK: 340560ce86c7SWei Liu case P9_TLOCK: 340660ce86c7SWei Liu case P9_TGETLOCK: 340760ce86c7SWei Liu case P9_TREADLINK: 340860ce86c7SWei Liu case P9_TVERSION: 340960ce86c7SWei Liu case P9_TLOPEN: 341060ce86c7SWei Liu case P9_TATTACH: 341160ce86c7SWei Liu case P9_TSTAT: 341260ce86c7SWei Liu case P9_TWALK: 341360ce86c7SWei Liu case P9_TCLUNK: 341460ce86c7SWei Liu case P9_TFSYNC: 341560ce86c7SWei Liu case P9_TOPEN: 341660ce86c7SWei Liu case P9_TREAD: 341760ce86c7SWei Liu case P9_TAUTH: 341860ce86c7SWei Liu case P9_TFLUSH: 341960ce86c7SWei Liu return 1; 342060ce86c7SWei Liu default: 342160ce86c7SWei Liu return 0; 342260ce86c7SWei Liu } 342360ce86c7SWei Liu } 342460ce86c7SWei Liu 342560ce86c7SWei Liu void pdu_submit(V9fsPDU *pdu) 342660ce86c7SWei Liu { 342760ce86c7SWei Liu Coroutine *co; 342860ce86c7SWei Liu CoroutineEntry *handler; 342960ce86c7SWei Liu V9fsState *s = pdu->s; 343060ce86c7SWei Liu 343160ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 343260ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 343360ce86c7SWei Liu handler = v9fs_op_not_supp; 343460ce86c7SWei Liu } else { 343560ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 343660ce86c7SWei Liu } 343760ce86c7SWei Liu 343860ce86c7SWei Liu if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 343960ce86c7SWei Liu handler = v9fs_fs_ro; 344060ce86c7SWei Liu } 34410b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 34420b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 344360ce86c7SWei Liu } 344460ce86c7SWei Liu 34452a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 34462a0c56aaSWei Liu int v9fs_device_realize_common(V9fsState *s, Error **errp) 34472a0c56aaSWei Liu { 34482a0c56aaSWei Liu int i, len; 34492a0c56aaSWei Liu struct stat stat; 34502a0c56aaSWei Liu FsDriverEntry *fse; 34512a0c56aaSWei Liu V9fsPath path; 34522a0c56aaSWei Liu int rc = 1; 34532a0c56aaSWei Liu 34542a0c56aaSWei Liu /* initialize pdu allocator */ 34552a0c56aaSWei Liu QLIST_INIT(&s->free_list); 34562a0c56aaSWei Liu QLIST_INIT(&s->active_list); 34570d78289cSGreg Kurz for (i = 0; i < MAX_REQ; i++) { 3458583f21f8SStefano Stabellini QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 3459583f21f8SStefano Stabellini s->pdus[i].s = s; 3460583f21f8SStefano Stabellini s->pdus[i].idx = i; 34612a0c56aaSWei Liu } 34622a0c56aaSWei Liu 34632a0c56aaSWei Liu v9fs_path_init(&path); 34642a0c56aaSWei Liu 34652a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 34662a0c56aaSWei Liu 34672a0c56aaSWei Liu if (!fse) { 34682a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 34692a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 34702a0c56aaSWei Liu "id = %s", 34712a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 34722a0c56aaSWei Liu goto out; 34732a0c56aaSWei Liu } 34742a0c56aaSWei Liu 34752a0c56aaSWei Liu if (!s->fsconf.tag) { 34762a0c56aaSWei Liu /* we haven't specified a mount_tag */ 34772a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 34782a0c56aaSWei Liu s->fsconf.fsdev_id); 34792a0c56aaSWei Liu goto out; 34802a0c56aaSWei Liu } 34812a0c56aaSWei Liu 34822a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 34832a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 34842a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 34852a0c56aaSWei Liu len = strlen(s->fsconf.tag); 34862a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 34872a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 34882a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 34892a0c56aaSWei Liu goto out; 34902a0c56aaSWei Liu } 34912a0c56aaSWei Liu 34922a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 34932a0c56aaSWei Liu s->ctx.uid = -1; 34942a0c56aaSWei Liu 34952a0c56aaSWei Liu s->ops = fse->ops; 34962a0c56aaSWei Liu 34972a0c56aaSWei Liu s->fid_list = NULL; 34982a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 34992a0c56aaSWei Liu 35002a0c56aaSWei Liu if (s->ops->init(&s->ctx) < 0) { 35012a0c56aaSWei Liu error_setg(errp, "9pfs Failed to initialize fs-driver with id:%s" 35022a0c56aaSWei Liu " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); 35032a0c56aaSWei Liu goto out; 35042a0c56aaSWei Liu } 35052a0c56aaSWei Liu 35062a0c56aaSWei Liu /* 35072a0c56aaSWei Liu * Check details of export path, We need to use fs driver 35082a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 35092a0c56aaSWei Liu * use co-routines here. 35102a0c56aaSWei Liu */ 35112a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 35122a0c56aaSWei Liu error_setg(errp, 35132a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 35142a0c56aaSWei Liu goto out; 35152a0c56aaSWei Liu } 35162a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 35172a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 35182a0c56aaSWei Liu goto out; 35192a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 35202a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 35212a0c56aaSWei Liu goto out; 35222a0c56aaSWei Liu } 35232a0c56aaSWei Liu v9fs_path_free(&path); 35242a0c56aaSWei Liu 35252a0c56aaSWei Liu rc = 0; 35262a0c56aaSWei Liu out: 35272a0c56aaSWei Liu if (rc) { 3528f2b58c43SGreg Kurz if (s->ops && s->ops->cleanup && s->ctx.private) { 3529702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3530702dbcc2SLi Qiang } 35312a0c56aaSWei Liu g_free(s->tag); 35324774718eSLi Qiang g_free(s->ctx.fs_root); 35332a0c56aaSWei Liu v9fs_path_free(&path); 35342a0c56aaSWei Liu } 35352a0c56aaSWei Liu return rc; 35362a0c56aaSWei Liu } 35372a0c56aaSWei Liu 35382a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 35392a0c56aaSWei Liu { 3540702dbcc2SLi Qiang if (s->ops->cleanup) { 3541702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3542702dbcc2SLi Qiang } 35432a0c56aaSWei Liu g_free(s->tag); 35444774718eSLi Qiang g_free(s->ctx.fs_root); 35452a0c56aaSWei Liu } 35462a0c56aaSWei Liu 35470e44a0fdSGreg Kurz typedef struct VirtfsCoResetData { 35480e44a0fdSGreg Kurz V9fsPDU pdu; 35490e44a0fdSGreg Kurz bool done; 35500e44a0fdSGreg Kurz } VirtfsCoResetData; 35510e44a0fdSGreg Kurz 35520e44a0fdSGreg Kurz static void coroutine_fn virtfs_co_reset(void *opaque) 35530e44a0fdSGreg Kurz { 35540e44a0fdSGreg Kurz VirtfsCoResetData *data = opaque; 35550e44a0fdSGreg Kurz 35560e44a0fdSGreg Kurz virtfs_reset(&data->pdu); 35570e44a0fdSGreg Kurz data->done = true; 35580e44a0fdSGreg Kurz } 35590e44a0fdSGreg Kurz 35600e44a0fdSGreg Kurz void v9fs_reset(V9fsState *s) 35610e44a0fdSGreg Kurz { 35620e44a0fdSGreg Kurz VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; 35630e44a0fdSGreg Kurz Coroutine *co; 35640e44a0fdSGreg Kurz 35650e44a0fdSGreg Kurz while (!QLIST_EMPTY(&s->active_list)) { 35660e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 35670e44a0fdSGreg Kurz } 35680e44a0fdSGreg Kurz 35690e44a0fdSGreg Kurz co = qemu_coroutine_create(virtfs_co_reset, &data); 35700e44a0fdSGreg Kurz qemu_coroutine_enter(co); 35710e44a0fdSGreg Kurz 35720e44a0fdSGreg Kurz while (!data.done) { 35730e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 35740e44a0fdSGreg Kurz } 35750e44a0fdSGreg Kurz } 35760e44a0fdSGreg Kurz 357760ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 357860ce86c7SWei Liu { 357960ce86c7SWei Liu struct rlimit rlim; 358060ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 358163325b18SGreg Kurz error_report("Failed to get the resource limit"); 358260ce86c7SWei Liu exit(1); 358360ce86c7SWei Liu } 358460ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 358560ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 358660ce86c7SWei Liu } 3587