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) { 542*6d54af0eSGreg Kurz /* Get fid */ 54360ce86c7SWei Liu fidp = s->fid_list; 544*6d54af0eSGreg Kurz fidp->ref++; 54560ce86c7SWei Liu 546*6d54af0eSGreg Kurz /* Clunk fid */ 547*6d54af0eSGreg Kurz s->fid_list = fidp->next; 54860ce86c7SWei Liu fidp->clunked = 1; 549*6d54af0eSGreg Kurz 550*6d54af0eSGreg Kurz put_fid(pdu, fidp); 55160ce86c7SWei Liu } 55260ce86c7SWei Liu } 55360ce86c7SWei Liu 55460ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 55560ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 55660ce86c7SWei Liu 55760ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 55860ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 55960ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 56060ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 56160ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 56260ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 56360ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 56460ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 56560ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 56660ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 56760ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 56860ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 56960ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 57060ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 57160ce86c7SWei Liu 57260ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 57360ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 57460ce86c7SWei Liu P9_STAT_MODE_LINK | \ 57560ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 57660ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 57760ce86c7SWei Liu P9_STAT_MODE_SOCKET) 57860ce86c7SWei Liu 57960ce86c7SWei Liu /* This is the algorithm from ufs in spfs */ 58060ce86c7SWei Liu static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) 58160ce86c7SWei Liu { 58260ce86c7SWei Liu size_t size; 58360ce86c7SWei Liu 58460ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 58560ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 58660ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 58760ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 58860ce86c7SWei Liu qidp->type = 0; 58960ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 59060ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 59160ce86c7SWei Liu } 59260ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 59360ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 59460ce86c7SWei Liu } 59560ce86c7SWei Liu } 59660ce86c7SWei Liu 5978440e22eSGreg Kurz static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 5988440e22eSGreg Kurz V9fsQID *qidp) 59960ce86c7SWei Liu { 60060ce86c7SWei Liu struct stat stbuf; 60160ce86c7SWei Liu int err; 60260ce86c7SWei Liu 60360ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 60460ce86c7SWei Liu if (err < 0) { 60560ce86c7SWei Liu return err; 60660ce86c7SWei Liu } 60760ce86c7SWei Liu stat_to_qid(&stbuf, qidp); 60860ce86c7SWei Liu return 0; 60960ce86c7SWei Liu } 61060ce86c7SWei Liu 61160ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 61260ce86c7SWei Liu { 61360ce86c7SWei Liu V9fsPDU *pdu = NULL; 61460ce86c7SWei Liu 61560ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 61660ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 61760ce86c7SWei Liu QLIST_REMOVE(pdu, next); 61860ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 61960ce86c7SWei Liu } 62060ce86c7SWei Liu return pdu; 62160ce86c7SWei Liu } 62260ce86c7SWei Liu 62360ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 62460ce86c7SWei Liu { 62560ce86c7SWei Liu V9fsState *s = pdu->s; 626f74e27bfSGreg Kurz 627f74e27bfSGreg Kurz g_assert(!pdu->cancelled); 62860ce86c7SWei Liu QLIST_REMOVE(pdu, next); 62960ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 63060ce86c7SWei Liu } 63160ce86c7SWei Liu 63260ce86c7SWei Liu /* 63360ce86c7SWei Liu * We don't do error checking for pdu_marshal/unmarshal here 63460ce86c7SWei Liu * because we always expect to have enough space to encode 63560ce86c7SWei Liu * error details 63660ce86c7SWei Liu */ 6378440e22eSGreg Kurz static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) 63860ce86c7SWei Liu { 63960ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 64060ce86c7SWei Liu V9fsState *s = pdu->s; 64160ce86c7SWei Liu 64260ce86c7SWei Liu if (len < 0) { 64360ce86c7SWei Liu int err = -len; 64460ce86c7SWei Liu len = 7; 64560ce86c7SWei Liu 64660ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 64760ce86c7SWei Liu V9fsString str; 64860ce86c7SWei Liu 64960ce86c7SWei Liu str.data = strerror(err); 65060ce86c7SWei Liu str.size = strlen(str.data); 65160ce86c7SWei Liu 65260ce86c7SWei Liu len += pdu_marshal(pdu, len, "s", &str); 65360ce86c7SWei Liu id = P9_RERROR; 65460ce86c7SWei Liu } 65560ce86c7SWei Liu 65660ce86c7SWei Liu len += pdu_marshal(pdu, len, "d", err); 65760ce86c7SWei Liu 65860ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 65960ce86c7SWei Liu id = P9_RLERROR; 66060ce86c7SWei Liu } 66160ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 66260ce86c7SWei Liu } 66360ce86c7SWei Liu 66460ce86c7SWei Liu /* fill out the header */ 66560ce86c7SWei Liu pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); 66660ce86c7SWei Liu 66760ce86c7SWei Liu /* keep these in sync */ 66860ce86c7SWei Liu pdu->size = len; 66960ce86c7SWei Liu pdu->id = id; 67060ce86c7SWei Liu 67160ce86c7SWei Liu pdu_push_and_notify(pdu); 67260ce86c7SWei Liu 67360ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 674f74e27bfSGreg Kurz if (!qemu_co_queue_next(&pdu->complete)) { 67560ce86c7SWei Liu pdu_free(pdu); 67660ce86c7SWei Liu } 677f74e27bfSGreg Kurz } 67860ce86c7SWei Liu 67960ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 68060ce86c7SWei Liu { 68160ce86c7SWei Liu mode_t ret; 68260ce86c7SWei Liu 68360ce86c7SWei Liu ret = mode & 0777; 68460ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 68560ce86c7SWei Liu ret |= S_IFDIR; 68660ce86c7SWei Liu } 68760ce86c7SWei Liu 68860ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 68960ce86c7SWei Liu ret |= S_IFLNK; 69060ce86c7SWei Liu } 69160ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 69260ce86c7SWei Liu ret |= S_IFSOCK; 69360ce86c7SWei Liu } 69460ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 69560ce86c7SWei Liu ret |= S_IFIFO; 69660ce86c7SWei Liu } 69760ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 69860ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 69960ce86c7SWei Liu ret |= S_IFCHR; 70060ce86c7SWei Liu } else { 70160ce86c7SWei Liu ret |= S_IFBLK; 70260ce86c7SWei Liu } 70360ce86c7SWei Liu } 70460ce86c7SWei Liu 70560ce86c7SWei Liu if (!(ret&~0777)) { 70660ce86c7SWei Liu ret |= S_IFREG; 70760ce86c7SWei Liu } 70860ce86c7SWei Liu 70960ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 71060ce86c7SWei Liu ret |= S_ISUID; 71160ce86c7SWei Liu } 71260ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 71360ce86c7SWei Liu ret |= S_ISGID; 71460ce86c7SWei Liu } 71560ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 71660ce86c7SWei Liu ret |= S_ISVTX; 71760ce86c7SWei Liu } 71860ce86c7SWei Liu 71960ce86c7SWei Liu return ret; 72060ce86c7SWei Liu } 72160ce86c7SWei Liu 72260ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 72360ce86c7SWei Liu { 72460ce86c7SWei Liu if (stat->type == -1 && 72560ce86c7SWei Liu stat->dev == -1 && 72660ce86c7SWei Liu stat->qid.type == -1 && 72760ce86c7SWei Liu stat->qid.version == -1 && 72860ce86c7SWei Liu stat->qid.path == -1 && 72960ce86c7SWei Liu stat->mode == -1 && 73060ce86c7SWei Liu stat->atime == -1 && 73160ce86c7SWei Liu stat->mtime == -1 && 73260ce86c7SWei Liu stat->length == -1 && 73360ce86c7SWei Liu !stat->name.size && 73460ce86c7SWei Liu !stat->uid.size && 73560ce86c7SWei Liu !stat->gid.size && 73660ce86c7SWei Liu !stat->muid.size && 73760ce86c7SWei Liu stat->n_uid == -1 && 73860ce86c7SWei Liu stat->n_gid == -1 && 73960ce86c7SWei Liu stat->n_muid == -1) { 74060ce86c7SWei Liu return 1; 74160ce86c7SWei Liu } 74260ce86c7SWei Liu 74360ce86c7SWei Liu return 0; 74460ce86c7SWei Liu } 74560ce86c7SWei Liu 74660ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 74760ce86c7SWei Liu { 74860ce86c7SWei Liu v9fs_string_init(&stat->name); 74960ce86c7SWei Liu v9fs_string_init(&stat->uid); 75060ce86c7SWei Liu v9fs_string_init(&stat->gid); 75160ce86c7SWei Liu v9fs_string_init(&stat->muid); 75260ce86c7SWei Liu v9fs_string_init(&stat->extension); 75360ce86c7SWei Liu } 75460ce86c7SWei Liu 75560ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 75660ce86c7SWei Liu { 75760ce86c7SWei Liu v9fs_string_free(&stat->name); 75860ce86c7SWei Liu v9fs_string_free(&stat->uid); 75960ce86c7SWei Liu v9fs_string_free(&stat->gid); 76060ce86c7SWei Liu v9fs_string_free(&stat->muid); 76160ce86c7SWei Liu v9fs_string_free(&stat->extension); 76260ce86c7SWei Liu } 76360ce86c7SWei Liu 76460ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 76560ce86c7SWei Liu { 76660ce86c7SWei Liu uint32_t mode; 76760ce86c7SWei Liu 76860ce86c7SWei Liu mode = stbuf->st_mode & 0777; 76960ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 77060ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 77160ce86c7SWei Liu } 77260ce86c7SWei Liu 77360ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 77460ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 77560ce86c7SWei Liu } 77660ce86c7SWei Liu 77760ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 77860ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 77960ce86c7SWei Liu } 78060ce86c7SWei Liu 78160ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 78260ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 78360ce86c7SWei Liu } 78460ce86c7SWei Liu 78560ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 78660ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 78760ce86c7SWei Liu } 78860ce86c7SWei Liu 78960ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 79060ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 79160ce86c7SWei Liu } 79260ce86c7SWei Liu 79360ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 79460ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 79560ce86c7SWei Liu } 79660ce86c7SWei Liu 79760ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 79860ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 79960ce86c7SWei Liu } 80060ce86c7SWei Liu 80160ce86c7SWei Liu return mode; 80260ce86c7SWei Liu } 80360ce86c7SWei Liu 8048440e22eSGreg Kurz static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, 80560ce86c7SWei Liu const struct stat *stbuf, 80660ce86c7SWei Liu V9fsStat *v9stat) 80760ce86c7SWei Liu { 80860ce86c7SWei Liu int err; 80960ce86c7SWei Liu const char *str; 81060ce86c7SWei Liu 81160ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 81260ce86c7SWei Liu 81360ce86c7SWei Liu stat_to_qid(stbuf, &v9stat->qid); 81460ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 81560ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 81660ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 81760ce86c7SWei Liu v9stat->length = stbuf->st_size; 81860ce86c7SWei Liu 819abdf0086SGreg Kurz v9fs_string_free(&v9stat->uid); 820abdf0086SGreg Kurz v9fs_string_free(&v9stat->gid); 821abdf0086SGreg Kurz v9fs_string_free(&v9stat->muid); 82260ce86c7SWei Liu 82360ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 82460ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 82560ce86c7SWei Liu v9stat->n_muid = 0; 82660ce86c7SWei Liu 827abdf0086SGreg Kurz v9fs_string_free(&v9stat->extension); 82860ce86c7SWei Liu 82960ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 83060ce86c7SWei Liu err = v9fs_co_readlink(pdu, name, &v9stat->extension); 83160ce86c7SWei Liu if (err < 0) { 83260ce86c7SWei Liu return err; 83360ce86c7SWei Liu } 83460ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 83560ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 83660ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 83760ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 83860ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 83960ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 84060ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 84160ce86c7SWei Liu } 84260ce86c7SWei Liu 84360ce86c7SWei Liu str = strrchr(name->data, '/'); 84460ce86c7SWei Liu if (str) { 84560ce86c7SWei Liu str += 1; 84660ce86c7SWei Liu } else { 84760ce86c7SWei Liu str = name->data; 84860ce86c7SWei Liu } 84960ce86c7SWei Liu 85060ce86c7SWei Liu v9fs_string_sprintf(&v9stat->name, "%s", str); 85160ce86c7SWei Liu 85260ce86c7SWei Liu v9stat->size = 61 + 85360ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 85460ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 85560ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 85660ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 85760ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 85860ce86c7SWei Liu return 0; 85960ce86c7SWei Liu } 86060ce86c7SWei Liu 86160ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 86260ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 86360ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 86460ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 86560ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 86660ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 86760ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 86860ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 86960ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 87060ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 87160ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 87260ce86c7SWei Liu 87360ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 87460ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 87560ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 87660ce86c7SWei Liu 87760ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 87860ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 87960ce86c7SWei Liu 88060ce86c7SWei Liu 88160ce86c7SWei Liu static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, 88260ce86c7SWei Liu V9fsStatDotl *v9lstat) 88360ce86c7SWei Liu { 88460ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 88560ce86c7SWei Liu 88660ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 88760ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 88860ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 88960ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 89060ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 89160ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 89260ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 89360ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 89460ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 89560ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 89660ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 89760ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 89860ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 89960ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 90060ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 90160ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 90260ce86c7SWei Liu 90360ce86c7SWei Liu stat_to_qid(stbuf, &v9lstat->qid); 90460ce86c7SWei Liu } 90560ce86c7SWei Liu 90660ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 90760ce86c7SWei Liu { 90860ce86c7SWei Liu int i; 90960ce86c7SWei Liu 91060ce86c7SWei Liu printf("sg[%d]: {", cnt); 91160ce86c7SWei Liu for (i = 0; i < cnt; i++) { 91260ce86c7SWei Liu if (i) { 91360ce86c7SWei Liu printf(", "); 91460ce86c7SWei Liu } 91560ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 91660ce86c7SWei Liu } 91760ce86c7SWei Liu printf("}\n"); 91860ce86c7SWei Liu } 91960ce86c7SWei Liu 92060ce86c7SWei Liu /* Will call this only for path name based fid */ 92160ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 92260ce86c7SWei Liu { 92360ce86c7SWei Liu V9fsPath str; 92460ce86c7SWei Liu v9fs_path_init(&str); 92560ce86c7SWei Liu v9fs_path_copy(&str, dst); 926e3e83f2eSGreg Kurz v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); 92760ce86c7SWei Liu v9fs_path_free(&str); 92860ce86c7SWei Liu } 92960ce86c7SWei Liu 93060ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 93160ce86c7SWei Liu { 93260ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 93360ce86c7SWei Liu } 93460ce86c7SWei Liu 9358440e22eSGreg Kurz static void coroutine_fn v9fs_version(void *opaque) 93660ce86c7SWei Liu { 93760ce86c7SWei Liu ssize_t err; 93860ce86c7SWei Liu V9fsPDU *pdu = opaque; 93960ce86c7SWei Liu V9fsState *s = pdu->s; 94060ce86c7SWei Liu V9fsString version; 94160ce86c7SWei Liu size_t offset = 7; 94260ce86c7SWei Liu 94360ce86c7SWei Liu v9fs_string_init(&version); 94460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 94560ce86c7SWei Liu if (err < 0) { 94660ce86c7SWei Liu offset = err; 94760ce86c7SWei Liu goto out; 94860ce86c7SWei Liu } 94960ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 95060ce86c7SWei Liu 95160ce86c7SWei Liu virtfs_reset(pdu); 95260ce86c7SWei Liu 95360ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 95460ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 95560ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 95660ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 95760ce86c7SWei Liu } else { 95860ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 95960ce86c7SWei Liu } 96060ce86c7SWei Liu 96160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 96260ce86c7SWei Liu if (err < 0) { 96360ce86c7SWei Liu offset = err; 96460ce86c7SWei Liu goto out; 96560ce86c7SWei Liu } 96660ce86c7SWei Liu offset += err; 96760ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 96860ce86c7SWei Liu out: 96960ce86c7SWei Liu pdu_complete(pdu, offset); 97060ce86c7SWei Liu v9fs_string_free(&version); 97160ce86c7SWei Liu } 97260ce86c7SWei Liu 9738440e22eSGreg Kurz static void coroutine_fn v9fs_attach(void *opaque) 97460ce86c7SWei Liu { 97560ce86c7SWei Liu V9fsPDU *pdu = opaque; 97660ce86c7SWei Liu V9fsState *s = pdu->s; 97760ce86c7SWei Liu int32_t fid, afid, n_uname; 97860ce86c7SWei Liu V9fsString uname, aname; 97960ce86c7SWei Liu V9fsFidState *fidp; 98060ce86c7SWei Liu size_t offset = 7; 98160ce86c7SWei Liu V9fsQID qid; 98260ce86c7SWei Liu ssize_t err; 983fe44dc91SAshijeet Acharya Error *local_err = NULL; 98460ce86c7SWei Liu 98560ce86c7SWei Liu v9fs_string_init(&uname); 98660ce86c7SWei Liu v9fs_string_init(&aname); 98760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 98860ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 98960ce86c7SWei Liu if (err < 0) { 99060ce86c7SWei Liu goto out_nofid; 99160ce86c7SWei Liu } 99260ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 99360ce86c7SWei Liu 99460ce86c7SWei Liu fidp = alloc_fid(s, fid); 99560ce86c7SWei Liu if (fidp == NULL) { 99660ce86c7SWei Liu err = -EINVAL; 99760ce86c7SWei Liu goto out_nofid; 99860ce86c7SWei Liu } 99960ce86c7SWei Liu fidp->uid = n_uname; 100060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 100160ce86c7SWei Liu if (err < 0) { 100260ce86c7SWei Liu err = -EINVAL; 100360ce86c7SWei Liu clunk_fid(s, fid); 100460ce86c7SWei Liu goto out; 100560ce86c7SWei Liu } 100660ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 100760ce86c7SWei Liu if (err < 0) { 100860ce86c7SWei Liu err = -EINVAL; 100960ce86c7SWei Liu clunk_fid(s, fid); 101060ce86c7SWei Liu goto out; 101160ce86c7SWei Liu } 1012fe44dc91SAshijeet Acharya 1013fe44dc91SAshijeet Acharya /* 1014fe44dc91SAshijeet Acharya * disable migration if we haven't done already. 1015fe44dc91SAshijeet Acharya * attach could get called multiple times for the same export. 1016fe44dc91SAshijeet Acharya */ 1017fe44dc91SAshijeet Acharya if (!s->migration_blocker) { 1018fe44dc91SAshijeet Acharya error_setg(&s->migration_blocker, 1019fe44dc91SAshijeet Acharya "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 1020fe44dc91SAshijeet Acharya s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 1021fe44dc91SAshijeet Acharya err = migrate_add_blocker(s->migration_blocker, &local_err); 1022fe44dc91SAshijeet Acharya if (local_err) { 1023fe44dc91SAshijeet Acharya error_free(local_err); 1024fe44dc91SAshijeet Acharya error_free(s->migration_blocker); 1025fe44dc91SAshijeet Acharya s->migration_blocker = NULL; 1026fe44dc91SAshijeet Acharya clunk_fid(s, fid); 1027fe44dc91SAshijeet Acharya goto out; 1028fe44dc91SAshijeet Acharya } 1029fe44dc91SAshijeet Acharya s->root_fid = fid; 1030fe44dc91SAshijeet Acharya } 1031fe44dc91SAshijeet Acharya 103260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 103360ce86c7SWei Liu if (err < 0) { 103460ce86c7SWei Liu clunk_fid(s, fid); 103560ce86c7SWei Liu goto out; 103660ce86c7SWei Liu } 103760ce86c7SWei Liu err += offset; 1038fe44dc91SAshijeet Acharya 103956f101ecSGreg Kurz memcpy(&s->root_qid, &qid, sizeof(qid)); 104060ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 104160ce86c7SWei Liu qid.type, qid.version, qid.path); 104260ce86c7SWei Liu out: 104360ce86c7SWei Liu put_fid(pdu, fidp); 104460ce86c7SWei Liu out_nofid: 104560ce86c7SWei Liu pdu_complete(pdu, err); 104660ce86c7SWei Liu v9fs_string_free(&uname); 104760ce86c7SWei Liu v9fs_string_free(&aname); 104860ce86c7SWei Liu } 104960ce86c7SWei Liu 10508440e22eSGreg Kurz static void coroutine_fn v9fs_stat(void *opaque) 105160ce86c7SWei Liu { 105260ce86c7SWei Liu int32_t fid; 105360ce86c7SWei Liu V9fsStat v9stat; 105460ce86c7SWei Liu ssize_t err = 0; 105560ce86c7SWei Liu size_t offset = 7; 105660ce86c7SWei Liu struct stat stbuf; 105760ce86c7SWei Liu V9fsFidState *fidp; 105860ce86c7SWei Liu V9fsPDU *pdu = opaque; 105960ce86c7SWei Liu 106060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 106160ce86c7SWei Liu if (err < 0) { 106260ce86c7SWei Liu goto out_nofid; 106360ce86c7SWei Liu } 106460ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 106560ce86c7SWei Liu 106660ce86c7SWei Liu fidp = get_fid(pdu, fid); 106760ce86c7SWei Liu if (fidp == NULL) { 106860ce86c7SWei Liu err = -ENOENT; 106960ce86c7SWei Liu goto out_nofid; 107060ce86c7SWei Liu } 107160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 107260ce86c7SWei Liu if (err < 0) { 107360ce86c7SWei Liu goto out; 107460ce86c7SWei Liu } 107560ce86c7SWei Liu err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); 107660ce86c7SWei Liu if (err < 0) { 107760ce86c7SWei Liu goto out; 107860ce86c7SWei Liu } 107960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 108060ce86c7SWei Liu if (err < 0) { 108160ce86c7SWei Liu v9fs_stat_free(&v9stat); 108260ce86c7SWei Liu goto out; 108360ce86c7SWei Liu } 108460ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 108560ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 108660ce86c7SWei Liu err += offset; 108760ce86c7SWei Liu v9fs_stat_free(&v9stat); 108860ce86c7SWei Liu out: 108960ce86c7SWei Liu put_fid(pdu, fidp); 109060ce86c7SWei Liu out_nofid: 109160ce86c7SWei Liu pdu_complete(pdu, err); 109260ce86c7SWei Liu } 109360ce86c7SWei Liu 10948440e22eSGreg Kurz static void coroutine_fn v9fs_getattr(void *opaque) 109560ce86c7SWei Liu { 109660ce86c7SWei Liu int32_t fid; 109760ce86c7SWei Liu size_t offset = 7; 109860ce86c7SWei Liu ssize_t retval = 0; 109960ce86c7SWei Liu struct stat stbuf; 110060ce86c7SWei Liu V9fsFidState *fidp; 110160ce86c7SWei Liu uint64_t request_mask; 110260ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 110360ce86c7SWei Liu V9fsPDU *pdu = opaque; 110460ce86c7SWei Liu V9fsState *s = pdu->s; 110560ce86c7SWei Liu 110660ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 110760ce86c7SWei Liu if (retval < 0) { 110860ce86c7SWei Liu goto out_nofid; 110960ce86c7SWei Liu } 111060ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 111160ce86c7SWei Liu 111260ce86c7SWei Liu fidp = get_fid(pdu, fid); 111360ce86c7SWei Liu if (fidp == NULL) { 111460ce86c7SWei Liu retval = -ENOENT; 111560ce86c7SWei Liu goto out_nofid; 111660ce86c7SWei Liu } 111760ce86c7SWei Liu /* 111860ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 111960ce86c7SWei Liu * need to look at request_mask. 112060ce86c7SWei Liu */ 112160ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 112260ce86c7SWei Liu if (retval < 0) { 112360ce86c7SWei Liu goto out; 112460ce86c7SWei Liu } 112560ce86c7SWei Liu stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); 112660ce86c7SWei Liu 112760ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 112860ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 112960ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 113060ce86c7SWei Liu switch (retval) { 113160ce86c7SWei Liu case 0: 113260ce86c7SWei Liu /* we have valid st_gen: update result mask */ 113360ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 113460ce86c7SWei Liu break; 113560ce86c7SWei Liu case -EINTR: 113660ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 113760ce86c7SWei Liu goto out; 113860ce86c7SWei Liu default: 113960ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 114060ce86c7SWei Liu break; 114160ce86c7SWei Liu } 114260ce86c7SWei Liu } 114360ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 114460ce86c7SWei Liu if (retval < 0) { 114560ce86c7SWei Liu goto out; 114660ce86c7SWei Liu } 114760ce86c7SWei Liu retval += offset; 114860ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 114960ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 115060ce86c7SWei Liu v9stat_dotl.st_gid); 115160ce86c7SWei Liu out: 115260ce86c7SWei Liu put_fid(pdu, fidp); 115360ce86c7SWei Liu out_nofid: 115460ce86c7SWei Liu pdu_complete(pdu, retval); 115560ce86c7SWei Liu } 115660ce86c7SWei Liu 115760ce86c7SWei Liu /* Attribute flags */ 115860ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 115960ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 116060ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 116160ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 116260ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 116360ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 116460ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 116560ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 116660ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 116760ce86c7SWei Liu 116860ce86c7SWei Liu #define P9_ATTR_MASK 127 116960ce86c7SWei Liu 11708440e22eSGreg Kurz static void coroutine_fn v9fs_setattr(void *opaque) 117160ce86c7SWei Liu { 117260ce86c7SWei Liu int err = 0; 117360ce86c7SWei Liu int32_t fid; 117460ce86c7SWei Liu V9fsFidState *fidp; 117560ce86c7SWei Liu size_t offset = 7; 117660ce86c7SWei Liu V9fsIattr v9iattr; 117760ce86c7SWei Liu V9fsPDU *pdu = opaque; 117860ce86c7SWei Liu 117960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 118060ce86c7SWei Liu if (err < 0) { 118160ce86c7SWei Liu goto out_nofid; 118260ce86c7SWei Liu } 118360ce86c7SWei Liu 118460ce86c7SWei Liu fidp = get_fid(pdu, fid); 118560ce86c7SWei Liu if (fidp == NULL) { 118660ce86c7SWei Liu err = -EINVAL; 118760ce86c7SWei Liu goto out_nofid; 118860ce86c7SWei Liu } 118960ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 119060ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 119160ce86c7SWei Liu if (err < 0) { 119260ce86c7SWei Liu goto out; 119360ce86c7SWei Liu } 119460ce86c7SWei Liu } 119560ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 119660ce86c7SWei Liu struct timespec times[2]; 119760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 119860ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 119960ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 120060ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 120160ce86c7SWei Liu } else { 120260ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 120360ce86c7SWei Liu } 120460ce86c7SWei Liu } else { 120560ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 120660ce86c7SWei Liu } 120760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 120860ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 120960ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 121060ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 121160ce86c7SWei Liu } else { 121260ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 121360ce86c7SWei Liu } 121460ce86c7SWei Liu } else { 121560ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 121660ce86c7SWei Liu } 121760ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 121860ce86c7SWei Liu if (err < 0) { 121960ce86c7SWei Liu goto out; 122060ce86c7SWei Liu } 122160ce86c7SWei Liu } 122260ce86c7SWei Liu /* 122360ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 122460ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 122560ce86c7SWei Liu */ 122660ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 122760ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 122860ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 122960ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 123060ce86c7SWei Liu v9iattr.uid = -1; 123160ce86c7SWei Liu } 123260ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 123360ce86c7SWei Liu v9iattr.gid = -1; 123460ce86c7SWei Liu } 123560ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 123660ce86c7SWei Liu v9iattr.gid); 123760ce86c7SWei Liu if (err < 0) { 123860ce86c7SWei Liu goto out; 123960ce86c7SWei Liu } 124060ce86c7SWei Liu } 124160ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 124260ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 124360ce86c7SWei Liu if (err < 0) { 124460ce86c7SWei Liu goto out; 124560ce86c7SWei Liu } 124660ce86c7SWei Liu } 124760ce86c7SWei Liu err = offset; 124860ce86c7SWei Liu out: 124960ce86c7SWei Liu put_fid(pdu, fidp); 125060ce86c7SWei Liu out_nofid: 125160ce86c7SWei Liu pdu_complete(pdu, err); 125260ce86c7SWei Liu } 125360ce86c7SWei Liu 125460ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 125560ce86c7SWei Liu { 125660ce86c7SWei Liu int i; 125760ce86c7SWei Liu ssize_t err; 125860ce86c7SWei Liu size_t offset = 7; 125960ce86c7SWei Liu 126060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 126160ce86c7SWei Liu if (err < 0) { 126260ce86c7SWei Liu return err; 126360ce86c7SWei Liu } 126460ce86c7SWei Liu offset += err; 126560ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 126660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 126760ce86c7SWei Liu if (err < 0) { 126860ce86c7SWei Liu return err; 126960ce86c7SWei Liu } 127060ce86c7SWei Liu offset += err; 127160ce86c7SWei Liu } 127260ce86c7SWei Liu return offset; 127360ce86c7SWei Liu } 127460ce86c7SWei Liu 1275fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1276fff39a7aSGreg Kurz { 1277fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1278fff39a7aSGreg Kurz } 1279fff39a7aSGreg Kurz 128056f101ecSGreg Kurz static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) 128156f101ecSGreg Kurz { 128256f101ecSGreg Kurz return 128356f101ecSGreg Kurz qid1->type != qid2->type || 128456f101ecSGreg Kurz qid1->version != qid2->version || 128556f101ecSGreg Kurz qid1->path != qid2->path; 128656f101ecSGreg Kurz } 128756f101ecSGreg Kurz 12888440e22eSGreg Kurz static void coroutine_fn v9fs_walk(void *opaque) 128960ce86c7SWei Liu { 129060ce86c7SWei Liu int name_idx; 129160ce86c7SWei Liu V9fsQID *qids = NULL; 129260ce86c7SWei Liu int i, err = 0; 129360ce86c7SWei Liu V9fsPath dpath, path; 129460ce86c7SWei Liu uint16_t nwnames; 129560ce86c7SWei Liu struct stat stbuf; 129660ce86c7SWei Liu size_t offset = 7; 129760ce86c7SWei Liu int32_t fid, newfid; 129860ce86c7SWei Liu V9fsString *wnames = NULL; 129960ce86c7SWei Liu V9fsFidState *fidp; 130060ce86c7SWei Liu V9fsFidState *newfidp = NULL; 130160ce86c7SWei Liu V9fsPDU *pdu = opaque; 130260ce86c7SWei Liu V9fsState *s = pdu->s; 130356f101ecSGreg Kurz V9fsQID qid; 130460ce86c7SWei Liu 130560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 130660ce86c7SWei Liu if (err < 0) { 130760ce86c7SWei Liu pdu_complete(pdu, err); 130860ce86c7SWei Liu return ; 130960ce86c7SWei Liu } 131060ce86c7SWei Liu offset += err; 131160ce86c7SWei Liu 131260ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 131360ce86c7SWei Liu 131460ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 131560ce86c7SWei Liu wnames = g_malloc0(sizeof(wnames[0]) * nwnames); 131660ce86c7SWei Liu qids = g_malloc0(sizeof(qids[0]) * nwnames); 131760ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 131860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 131960ce86c7SWei Liu if (err < 0) { 132060ce86c7SWei Liu goto out_nofid; 132160ce86c7SWei Liu } 1322fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1323fff39a7aSGreg Kurz err = -ENOENT; 1324fff39a7aSGreg Kurz goto out_nofid; 1325fff39a7aSGreg Kurz } 132660ce86c7SWei Liu offset += err; 132760ce86c7SWei Liu } 132860ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 132960ce86c7SWei Liu err = -EINVAL; 133060ce86c7SWei Liu goto out_nofid; 133160ce86c7SWei Liu } 133260ce86c7SWei Liu fidp = get_fid(pdu, fid); 133360ce86c7SWei Liu if (fidp == NULL) { 133460ce86c7SWei Liu err = -ENOENT; 133560ce86c7SWei Liu goto out_nofid; 133660ce86c7SWei Liu } 133756f101ecSGreg Kurz 133813fd08e6SGreg Kurz v9fs_path_init(&dpath); 133913fd08e6SGreg Kurz v9fs_path_init(&path); 134013fd08e6SGreg Kurz 134156f101ecSGreg Kurz err = fid_to_qid(pdu, fidp, &qid); 134256f101ecSGreg Kurz if (err < 0) { 134356f101ecSGreg Kurz goto out; 134456f101ecSGreg Kurz } 134556f101ecSGreg Kurz 134660ce86c7SWei Liu /* 134760ce86c7SWei Liu * Both dpath and path initially poin to fidp. 134860ce86c7SWei Liu * Needed to handle request with nwnames == 0 134960ce86c7SWei Liu */ 135060ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 135160ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 135260ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 135356f101ecSGreg Kurz if (not_same_qid(&pdu->s->root_qid, &qid) || 135456f101ecSGreg Kurz strcmp("..", wnames[name_idx].data)) { 135556f101ecSGreg Kurz err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, 135656f101ecSGreg Kurz &path); 135760ce86c7SWei Liu if (err < 0) { 135860ce86c7SWei Liu goto out; 135960ce86c7SWei Liu } 136056f101ecSGreg Kurz 136160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 136260ce86c7SWei Liu if (err < 0) { 136360ce86c7SWei Liu goto out; 136460ce86c7SWei Liu } 136556f101ecSGreg Kurz stat_to_qid(&stbuf, &qid); 136660ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 136760ce86c7SWei Liu } 136856f101ecSGreg Kurz memcpy(&qids[name_idx], &qid, sizeof(qid)); 136956f101ecSGreg Kurz } 137060ce86c7SWei Liu if (fid == newfid) { 137149dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 137249dd946bSGreg Kurz err = -EINVAL; 137349dd946bSGreg Kurz goto out; 137449dd946bSGreg Kurz } 137560ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 137660ce86c7SWei Liu } else { 137760ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 137860ce86c7SWei Liu if (newfidp == NULL) { 137960ce86c7SWei Liu err = -EINVAL; 138060ce86c7SWei Liu goto out; 138160ce86c7SWei Liu } 138260ce86c7SWei Liu newfidp->uid = fidp->uid; 138360ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 138460ce86c7SWei Liu } 138560ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 138660ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 138760ce86c7SWei Liu out: 138860ce86c7SWei Liu put_fid(pdu, fidp); 138960ce86c7SWei Liu if (newfidp) { 139060ce86c7SWei Liu put_fid(pdu, newfidp); 139160ce86c7SWei Liu } 139260ce86c7SWei Liu v9fs_path_free(&dpath); 139360ce86c7SWei Liu v9fs_path_free(&path); 139460ce86c7SWei Liu out_nofid: 139560ce86c7SWei Liu pdu_complete(pdu, err); 139660ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 139760ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 139860ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 139960ce86c7SWei Liu } 140060ce86c7SWei Liu g_free(wnames); 140160ce86c7SWei Liu g_free(qids); 140260ce86c7SWei Liu } 140360ce86c7SWei Liu } 140460ce86c7SWei Liu 14058440e22eSGreg Kurz static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) 140660ce86c7SWei Liu { 140760ce86c7SWei Liu struct statfs stbuf; 140860ce86c7SWei Liu int32_t iounit = 0; 140960ce86c7SWei Liu V9fsState *s = pdu->s; 141060ce86c7SWei Liu 141160ce86c7SWei Liu /* 141260ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 141360ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 141460ce86c7SWei Liu */ 141560ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 141660ce86c7SWei Liu iounit = stbuf.f_bsize; 141760ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 141860ce86c7SWei Liu } 141960ce86c7SWei Liu if (!iounit) { 142060ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 142160ce86c7SWei Liu } 142260ce86c7SWei Liu return iounit; 142360ce86c7SWei Liu } 142460ce86c7SWei Liu 14258440e22eSGreg Kurz static void coroutine_fn v9fs_open(void *opaque) 142660ce86c7SWei Liu { 142760ce86c7SWei Liu int flags; 142860ce86c7SWei Liu int32_t fid; 142960ce86c7SWei Liu int32_t mode; 143060ce86c7SWei Liu V9fsQID qid; 143160ce86c7SWei Liu int iounit = 0; 143260ce86c7SWei Liu ssize_t err = 0; 143360ce86c7SWei Liu size_t offset = 7; 143460ce86c7SWei Liu struct stat stbuf; 143560ce86c7SWei Liu V9fsFidState *fidp; 143660ce86c7SWei Liu V9fsPDU *pdu = opaque; 143760ce86c7SWei Liu V9fsState *s = pdu->s; 143860ce86c7SWei Liu 143960ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 144060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 144160ce86c7SWei Liu } else { 144260ce86c7SWei Liu uint8_t modebyte; 144360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 144460ce86c7SWei Liu mode = modebyte; 144560ce86c7SWei Liu } 144660ce86c7SWei Liu if (err < 0) { 144760ce86c7SWei Liu goto out_nofid; 144860ce86c7SWei Liu } 144960ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 145060ce86c7SWei Liu 145160ce86c7SWei Liu fidp = get_fid(pdu, fid); 145260ce86c7SWei Liu if (fidp == NULL) { 145360ce86c7SWei Liu err = -ENOENT; 145460ce86c7SWei Liu goto out_nofid; 145560ce86c7SWei Liu } 145649dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 145749dd946bSGreg Kurz err = -EINVAL; 145849dd946bSGreg Kurz goto out; 145949dd946bSGreg Kurz } 146060ce86c7SWei Liu 146160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 146260ce86c7SWei Liu if (err < 0) { 146360ce86c7SWei Liu goto out; 146460ce86c7SWei Liu } 146560ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 146660ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 146760ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 146860ce86c7SWei Liu if (err < 0) { 146960ce86c7SWei Liu goto out; 147060ce86c7SWei Liu } 147160ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 147260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 147360ce86c7SWei Liu if (err < 0) { 147460ce86c7SWei Liu goto out; 147560ce86c7SWei Liu } 147660ce86c7SWei Liu err += offset; 147760ce86c7SWei Liu } else { 147860ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 147960ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 148060ce86c7SWei Liu } else { 148160ce86c7SWei Liu flags = omode_to_uflags(mode); 148260ce86c7SWei Liu } 148360ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 148460ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 148560ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 148660ce86c7SWei Liu err = -EROFS; 148760ce86c7SWei Liu goto out; 148860ce86c7SWei Liu } 148960ce86c7SWei Liu } 149060ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 149160ce86c7SWei Liu if (err < 0) { 149260ce86c7SWei Liu goto out; 149360ce86c7SWei Liu } 149460ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 149560ce86c7SWei Liu fidp->open_flags = flags; 149660ce86c7SWei Liu if (flags & O_EXCL) { 149760ce86c7SWei Liu /* 149860ce86c7SWei Liu * We let the host file system do O_EXCL check 149960ce86c7SWei Liu * We should not reclaim such fd 150060ce86c7SWei Liu */ 150160ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 150260ce86c7SWei Liu } 150360ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 150460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 150560ce86c7SWei Liu if (err < 0) { 150660ce86c7SWei Liu goto out; 150760ce86c7SWei Liu } 150860ce86c7SWei Liu err += offset; 150960ce86c7SWei Liu } 151060ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 151160ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 151260ce86c7SWei Liu out: 151360ce86c7SWei Liu put_fid(pdu, fidp); 151460ce86c7SWei Liu out_nofid: 151560ce86c7SWei Liu pdu_complete(pdu, err); 151660ce86c7SWei Liu } 151760ce86c7SWei Liu 15188440e22eSGreg Kurz static void coroutine_fn v9fs_lcreate(void *opaque) 151960ce86c7SWei Liu { 152060ce86c7SWei Liu int32_t dfid, flags, mode; 152160ce86c7SWei Liu gid_t gid; 152260ce86c7SWei Liu ssize_t err = 0; 152360ce86c7SWei Liu ssize_t offset = 7; 152460ce86c7SWei Liu V9fsString name; 152560ce86c7SWei Liu V9fsFidState *fidp; 152660ce86c7SWei Liu struct stat stbuf; 152760ce86c7SWei Liu V9fsQID qid; 152860ce86c7SWei Liu int32_t iounit; 152960ce86c7SWei Liu V9fsPDU *pdu = opaque; 153060ce86c7SWei Liu 153160ce86c7SWei Liu v9fs_string_init(&name); 153260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 153360ce86c7SWei Liu &name, &flags, &mode, &gid); 153460ce86c7SWei Liu if (err < 0) { 153560ce86c7SWei Liu goto out_nofid; 153660ce86c7SWei Liu } 153760ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 153860ce86c7SWei Liu 1539fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1540fff39a7aSGreg Kurz err = -ENOENT; 1541fff39a7aSGreg Kurz goto out_nofid; 1542fff39a7aSGreg Kurz } 1543fff39a7aSGreg Kurz 1544805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1545805b5d98SGreg Kurz err = -EEXIST; 1546805b5d98SGreg Kurz goto out_nofid; 1547805b5d98SGreg Kurz } 1548805b5d98SGreg Kurz 154960ce86c7SWei Liu fidp = get_fid(pdu, dfid); 155060ce86c7SWei Liu if (fidp == NULL) { 155160ce86c7SWei Liu err = -ENOENT; 155260ce86c7SWei Liu goto out_nofid; 155360ce86c7SWei Liu } 1554d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 1555d63fb193SLi Qiang err = -EINVAL; 1556d63fb193SLi Qiang goto out; 1557d63fb193SLi Qiang } 155860ce86c7SWei Liu 155960ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 156060ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 156160ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 156260ce86c7SWei Liu if (err < 0) { 156360ce86c7SWei Liu goto out; 156460ce86c7SWei Liu } 156560ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 156660ce86c7SWei Liu fidp->open_flags = flags; 156760ce86c7SWei Liu if (flags & O_EXCL) { 156860ce86c7SWei Liu /* 156960ce86c7SWei Liu * We let the host file system do O_EXCL check 157060ce86c7SWei Liu * We should not reclaim such fd 157160ce86c7SWei Liu */ 157260ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 157360ce86c7SWei Liu } 157460ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 157560ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 157660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 157760ce86c7SWei Liu if (err < 0) { 157860ce86c7SWei Liu goto out; 157960ce86c7SWei Liu } 158060ce86c7SWei Liu err += offset; 158160ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 158260ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 158360ce86c7SWei Liu out: 158460ce86c7SWei Liu put_fid(pdu, fidp); 158560ce86c7SWei Liu out_nofid: 158660ce86c7SWei Liu pdu_complete(pdu, err); 158760ce86c7SWei Liu v9fs_string_free(&name); 158860ce86c7SWei Liu } 158960ce86c7SWei Liu 1590a1bf8b74SGreg Kurz static void coroutine_fn v9fs_fsync(void *opaque) 159160ce86c7SWei Liu { 159260ce86c7SWei Liu int err; 159360ce86c7SWei Liu int32_t fid; 159460ce86c7SWei Liu int datasync; 159560ce86c7SWei Liu size_t offset = 7; 159660ce86c7SWei Liu V9fsFidState *fidp; 159760ce86c7SWei Liu V9fsPDU *pdu = opaque; 159860ce86c7SWei Liu 159960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 160060ce86c7SWei Liu if (err < 0) { 160160ce86c7SWei Liu goto out_nofid; 160260ce86c7SWei Liu } 160360ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 160460ce86c7SWei Liu 160560ce86c7SWei Liu fidp = get_fid(pdu, fid); 160660ce86c7SWei Liu if (fidp == NULL) { 160760ce86c7SWei Liu err = -ENOENT; 160860ce86c7SWei Liu goto out_nofid; 160960ce86c7SWei Liu } 161060ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 161160ce86c7SWei Liu if (!err) { 161260ce86c7SWei Liu err = offset; 161360ce86c7SWei Liu } 161460ce86c7SWei Liu put_fid(pdu, fidp); 161560ce86c7SWei Liu out_nofid: 161660ce86c7SWei Liu pdu_complete(pdu, err); 161760ce86c7SWei Liu } 161860ce86c7SWei Liu 16198440e22eSGreg Kurz static void coroutine_fn v9fs_clunk(void *opaque) 162060ce86c7SWei Liu { 162160ce86c7SWei Liu int err; 162260ce86c7SWei Liu int32_t fid; 162360ce86c7SWei Liu size_t offset = 7; 162460ce86c7SWei Liu V9fsFidState *fidp; 162560ce86c7SWei Liu V9fsPDU *pdu = opaque; 162660ce86c7SWei Liu V9fsState *s = pdu->s; 162760ce86c7SWei Liu 162860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 162960ce86c7SWei Liu if (err < 0) { 163060ce86c7SWei Liu goto out_nofid; 163160ce86c7SWei Liu } 163260ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 163360ce86c7SWei Liu 163460ce86c7SWei Liu fidp = clunk_fid(s, fid); 163560ce86c7SWei Liu if (fidp == NULL) { 163660ce86c7SWei Liu err = -ENOENT; 163760ce86c7SWei Liu goto out_nofid; 163860ce86c7SWei Liu } 163960ce86c7SWei Liu /* 164060ce86c7SWei Liu * Bump the ref so that put_fid will 164160ce86c7SWei Liu * free the fid. 164260ce86c7SWei Liu */ 164360ce86c7SWei Liu fidp->ref++; 164460ce86c7SWei Liu err = put_fid(pdu, fidp); 164560ce86c7SWei Liu if (!err) { 164660ce86c7SWei Liu err = offset; 164760ce86c7SWei Liu } 164860ce86c7SWei Liu out_nofid: 164960ce86c7SWei Liu pdu_complete(pdu, err); 165060ce86c7SWei Liu } 165160ce86c7SWei Liu 1652bcb8998fSStefano Stabellini /* 1653bcb8998fSStefano Stabellini * Create a QEMUIOVector for a sub-region of PDU iovecs 1654bcb8998fSStefano Stabellini * 1655bcb8998fSStefano Stabellini * @qiov: uninitialized QEMUIOVector 1656bcb8998fSStefano Stabellini * @skip: number of bytes to skip from beginning of PDU 1657bcb8998fSStefano Stabellini * @size: number of bytes to include 1658bcb8998fSStefano Stabellini * @is_write: true - write, false - read 1659bcb8998fSStefano Stabellini * 1660bcb8998fSStefano Stabellini * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 1661bcb8998fSStefano Stabellini * with qemu_iovec_destroy(). 1662bcb8998fSStefano Stabellini */ 1663bcb8998fSStefano Stabellini static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 1664bcb8998fSStefano Stabellini size_t skip, size_t size, 1665bcb8998fSStefano Stabellini bool is_write) 1666bcb8998fSStefano Stabellini { 1667bcb8998fSStefano Stabellini QEMUIOVector elem; 1668bcb8998fSStefano Stabellini struct iovec *iov; 1669bcb8998fSStefano Stabellini unsigned int niov; 1670bcb8998fSStefano Stabellini 167188da0b03SStefano Stabellini if (is_write) { 167288da0b03SStefano Stabellini pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov); 167388da0b03SStefano Stabellini } else { 1674fa0eb5c5SGreg Kurz pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); 167588da0b03SStefano Stabellini } 1676bcb8998fSStefano Stabellini 1677bcb8998fSStefano Stabellini qemu_iovec_init_external(&elem, iov, niov); 1678bcb8998fSStefano Stabellini qemu_iovec_init(qiov, niov); 1679bcb8998fSStefano Stabellini qemu_iovec_concat(qiov, &elem, skip, size); 1680bcb8998fSStefano Stabellini } 1681bcb8998fSStefano Stabellini 168260ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 168360ce86c7SWei Liu uint64_t off, uint32_t max_count) 168460ce86c7SWei Liu { 168560ce86c7SWei Liu ssize_t err; 168660ce86c7SWei Liu size_t offset = 7; 16877e55d65cSLi Qiang uint64_t read_count; 1688bcb8998fSStefano Stabellini QEMUIOVector qiov_full; 168960ce86c7SWei Liu 16907e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 16917e55d65cSLi Qiang read_count = 0; 16927e55d65cSLi Qiang } else { 16937e55d65cSLi Qiang read_count = fidp->fs.xattr.len - off; 16947e55d65cSLi Qiang } 169560ce86c7SWei Liu if (read_count > max_count) { 169660ce86c7SWei Liu read_count = max_count; 169760ce86c7SWei Liu } 169860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 169960ce86c7SWei Liu if (err < 0) { 170060ce86c7SWei Liu return err; 170160ce86c7SWei Liu } 170260ce86c7SWei Liu offset += err; 170300588a0aSWei Liu 1704fa0eb5c5SGreg Kurz v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); 1705fa0eb5c5SGreg Kurz err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, 170660ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 170760ce86c7SWei Liu read_count); 1708bcb8998fSStefano Stabellini qemu_iovec_destroy(&qiov_full); 170960ce86c7SWei Liu if (err < 0) { 171060ce86c7SWei Liu return err; 171160ce86c7SWei Liu } 171260ce86c7SWei Liu offset += err; 171360ce86c7SWei Liu return offset; 171460ce86c7SWei Liu } 171560ce86c7SWei Liu 17168440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, 17178440e22eSGreg Kurz V9fsFidState *fidp, 17188440e22eSGreg Kurz uint32_t max_count) 171960ce86c7SWei Liu { 172060ce86c7SWei Liu V9fsPath path; 172160ce86c7SWei Liu V9fsStat v9stat; 172260ce86c7SWei Liu int len, err = 0; 172360ce86c7SWei Liu int32_t count = 0; 172460ce86c7SWei Liu struct stat stbuf; 172560ce86c7SWei Liu off_t saved_dir_pos; 1726635324e8SGreg Kurz struct dirent *dent; 172760ce86c7SWei Liu 172860ce86c7SWei Liu /* save the directory position */ 172960ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 173060ce86c7SWei Liu if (saved_dir_pos < 0) { 173160ce86c7SWei Liu return saved_dir_pos; 173260ce86c7SWei Liu } 173360ce86c7SWei Liu 173460ce86c7SWei Liu while (1) { 173560ce86c7SWei Liu v9fs_path_init(&path); 17367cde47d4SGreg Kurz 17377cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 17387cde47d4SGreg Kurz 1739635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1740635324e8SGreg Kurz if (err || !dent) { 174160ce86c7SWei Liu break; 174260ce86c7SWei Liu } 174360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 174460ce86c7SWei Liu if (err < 0) { 17458762a46dSGreg Kurz break; 174660ce86c7SWei Liu } 174760ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 174860ce86c7SWei Liu if (err < 0) { 17498762a46dSGreg Kurz break; 175060ce86c7SWei Liu } 175160ce86c7SWei Liu err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); 175260ce86c7SWei Liu if (err < 0) { 17538762a46dSGreg Kurz break; 175460ce86c7SWei Liu } 175560ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 175660ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 17577cde47d4SGreg Kurz 17587cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 17597cde47d4SGreg Kurz 176060ce86c7SWei Liu if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { 176160ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 176260ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 176360ce86c7SWei Liu v9fs_stat_free(&v9stat); 176460ce86c7SWei Liu v9fs_path_free(&path); 176560ce86c7SWei Liu return count; 176660ce86c7SWei Liu } 176760ce86c7SWei Liu count += len; 176860ce86c7SWei Liu v9fs_stat_free(&v9stat); 176960ce86c7SWei Liu v9fs_path_free(&path); 177060ce86c7SWei Liu saved_dir_pos = dent->d_off; 177160ce86c7SWei Liu } 17728762a46dSGreg Kurz 17737cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 17747cde47d4SGreg Kurz 177560ce86c7SWei Liu v9fs_path_free(&path); 177660ce86c7SWei Liu if (err < 0) { 177760ce86c7SWei Liu return err; 177860ce86c7SWei Liu } 177960ce86c7SWei Liu return count; 178060ce86c7SWei Liu } 178160ce86c7SWei Liu 17828440e22eSGreg Kurz static void coroutine_fn v9fs_read(void *opaque) 178360ce86c7SWei Liu { 178460ce86c7SWei Liu int32_t fid; 178560ce86c7SWei Liu uint64_t off; 178660ce86c7SWei Liu ssize_t err = 0; 178760ce86c7SWei Liu int32_t count = 0; 178860ce86c7SWei Liu size_t offset = 7; 178960ce86c7SWei Liu uint32_t max_count; 179060ce86c7SWei Liu V9fsFidState *fidp; 179160ce86c7SWei Liu V9fsPDU *pdu = opaque; 179260ce86c7SWei Liu V9fsState *s = pdu->s; 179360ce86c7SWei Liu 179460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 179560ce86c7SWei Liu if (err < 0) { 179660ce86c7SWei Liu goto out_nofid; 179760ce86c7SWei Liu } 179860ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 179960ce86c7SWei Liu 180060ce86c7SWei Liu fidp = get_fid(pdu, fid); 180160ce86c7SWei Liu if (fidp == NULL) { 180260ce86c7SWei Liu err = -EINVAL; 180360ce86c7SWei Liu goto out_nofid; 180460ce86c7SWei Liu } 180560ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 180660ce86c7SWei Liu 180760ce86c7SWei Liu if (off == 0) { 180860ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 180960ce86c7SWei Liu } 181060ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 181160ce86c7SWei Liu if (count < 0) { 181260ce86c7SWei Liu err = count; 181360ce86c7SWei Liu goto out; 181460ce86c7SWei Liu } 181560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 181660ce86c7SWei Liu if (err < 0) { 181760ce86c7SWei Liu goto out; 181860ce86c7SWei Liu } 181960ce86c7SWei Liu err += offset + count; 182060ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 182160ce86c7SWei Liu QEMUIOVector qiov_full; 182260ce86c7SWei Liu QEMUIOVector qiov; 182360ce86c7SWei Liu int32_t len; 182460ce86c7SWei Liu 182560ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 182660ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 182760ce86c7SWei Liu do { 182860ce86c7SWei Liu qemu_iovec_reset(&qiov); 182960ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 183060ce86c7SWei Liu if (0) { 183160ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 183260ce86c7SWei Liu } 183360ce86c7SWei Liu /* Loop in case of EINTR */ 183460ce86c7SWei Liu do { 183560ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 183660ce86c7SWei Liu if (len >= 0) { 183760ce86c7SWei Liu off += len; 183860ce86c7SWei Liu count += len; 183960ce86c7SWei Liu } 184060ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 184160ce86c7SWei Liu if (len < 0) { 184260ce86c7SWei Liu /* IO error return the error */ 184360ce86c7SWei Liu err = len; 1844e95c9a49SLi Qiang goto out_free_iovec; 184560ce86c7SWei Liu } 184660ce86c7SWei Liu } while (count < max_count && len > 0); 184760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 184860ce86c7SWei Liu if (err < 0) { 1849e95c9a49SLi Qiang goto out_free_iovec; 185060ce86c7SWei Liu } 185160ce86c7SWei Liu err += offset + count; 1852e95c9a49SLi Qiang out_free_iovec: 185360ce86c7SWei Liu qemu_iovec_destroy(&qiov); 185460ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 185560ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 185660ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 185760ce86c7SWei Liu } else { 185860ce86c7SWei Liu err = -EINVAL; 185960ce86c7SWei Liu } 186060ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 186160ce86c7SWei Liu out: 186260ce86c7SWei Liu put_fid(pdu, fidp); 186360ce86c7SWei Liu out_nofid: 186460ce86c7SWei Liu pdu_complete(pdu, err); 186560ce86c7SWei Liu } 186660ce86c7SWei Liu 186760ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 186860ce86c7SWei Liu { 186960ce86c7SWei Liu /* 187060ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 187160ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 187260ce86c7SWei Liu */ 187360ce86c7SWei Liu return 24 + v9fs_string_size(name); 187460ce86c7SWei Liu } 187560ce86c7SWei Liu 18768440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, 18778440e22eSGreg Kurz int32_t max_count) 187860ce86c7SWei Liu { 187960ce86c7SWei Liu size_t size; 188060ce86c7SWei Liu V9fsQID qid; 188160ce86c7SWei Liu V9fsString name; 188260ce86c7SWei Liu int len, err = 0; 188360ce86c7SWei Liu int32_t count = 0; 188460ce86c7SWei Liu off_t saved_dir_pos; 1885635324e8SGreg Kurz struct dirent *dent; 188660ce86c7SWei Liu 188760ce86c7SWei Liu /* save the directory position */ 188860ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 188960ce86c7SWei Liu if (saved_dir_pos < 0) { 189060ce86c7SWei Liu return saved_dir_pos; 189160ce86c7SWei Liu } 189260ce86c7SWei Liu 189360ce86c7SWei Liu while (1) { 18947cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 18957cde47d4SGreg Kurz 1896635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1897635324e8SGreg Kurz if (err || !dent) { 189860ce86c7SWei Liu break; 189960ce86c7SWei Liu } 190060ce86c7SWei Liu v9fs_string_init(&name); 190160ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 190260ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 19037cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19047cde47d4SGreg Kurz 190560ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 190660ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 190760ce86c7SWei Liu v9fs_string_free(&name); 190860ce86c7SWei Liu return count; 190960ce86c7SWei Liu } 191060ce86c7SWei Liu /* 191160ce86c7SWei Liu * Fill up just the path field of qid because the client uses 191260ce86c7SWei Liu * only that. To fill the entire qid structure we will have 191360ce86c7SWei Liu * to stat each dirent found, which is expensive 191460ce86c7SWei Liu */ 191560ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 191660ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 191760ce86c7SWei Liu /* Fill the other fields with dummy values */ 191860ce86c7SWei Liu qid.type = 0; 191960ce86c7SWei Liu qid.version = 0; 192060ce86c7SWei Liu 192160ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 192260ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 192360ce86c7SWei Liu &qid, dent->d_off, 192460ce86c7SWei Liu dent->d_type, &name); 19257cde47d4SGreg Kurz 19267cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19277cde47d4SGreg Kurz 192860ce86c7SWei Liu if (len < 0) { 192960ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 193060ce86c7SWei Liu v9fs_string_free(&name); 193160ce86c7SWei Liu return len; 193260ce86c7SWei Liu } 193360ce86c7SWei Liu count += len; 193460ce86c7SWei Liu v9fs_string_free(&name); 193560ce86c7SWei Liu saved_dir_pos = dent->d_off; 193660ce86c7SWei Liu } 19377cde47d4SGreg Kurz 19387cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19397cde47d4SGreg Kurz 194060ce86c7SWei Liu if (err < 0) { 194160ce86c7SWei Liu return err; 194260ce86c7SWei Liu } 194360ce86c7SWei Liu return count; 194460ce86c7SWei Liu } 194560ce86c7SWei Liu 19468440e22eSGreg Kurz static void coroutine_fn v9fs_readdir(void *opaque) 194760ce86c7SWei Liu { 194860ce86c7SWei Liu int32_t fid; 194960ce86c7SWei Liu V9fsFidState *fidp; 195060ce86c7SWei Liu ssize_t retval = 0; 195160ce86c7SWei Liu size_t offset = 7; 195260ce86c7SWei Liu uint64_t initial_offset; 195360ce86c7SWei Liu int32_t count; 195460ce86c7SWei Liu uint32_t max_count; 195560ce86c7SWei Liu V9fsPDU *pdu = opaque; 195660ce86c7SWei Liu 195760ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 195860ce86c7SWei Liu &initial_offset, &max_count); 195960ce86c7SWei Liu if (retval < 0) { 196060ce86c7SWei Liu goto out_nofid; 196160ce86c7SWei Liu } 196260ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 196360ce86c7SWei Liu 196460ce86c7SWei Liu fidp = get_fid(pdu, fid); 196560ce86c7SWei Liu if (fidp == NULL) { 196660ce86c7SWei Liu retval = -EINVAL; 196760ce86c7SWei Liu goto out_nofid; 196860ce86c7SWei Liu } 1969f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 197060ce86c7SWei Liu retval = -EINVAL; 197160ce86c7SWei Liu goto out; 197260ce86c7SWei Liu } 197360ce86c7SWei Liu if (initial_offset == 0) { 197460ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 197560ce86c7SWei Liu } else { 197660ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 197760ce86c7SWei Liu } 197860ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 197960ce86c7SWei Liu if (count < 0) { 198060ce86c7SWei Liu retval = count; 198160ce86c7SWei Liu goto out; 198260ce86c7SWei Liu } 198360ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 198460ce86c7SWei Liu if (retval < 0) { 198560ce86c7SWei Liu goto out; 198660ce86c7SWei Liu } 198760ce86c7SWei Liu retval += count + offset; 198860ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 198960ce86c7SWei Liu out: 199060ce86c7SWei Liu put_fid(pdu, fidp); 199160ce86c7SWei Liu out_nofid: 199260ce86c7SWei Liu pdu_complete(pdu, retval); 199360ce86c7SWei Liu } 199460ce86c7SWei Liu 199560ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 199660ce86c7SWei Liu uint64_t off, uint32_t count, 199760ce86c7SWei Liu struct iovec *sg, int cnt) 199860ce86c7SWei Liu { 199960ce86c7SWei Liu int i, to_copy; 200060ce86c7SWei Liu ssize_t err = 0; 20017e55d65cSLi Qiang uint64_t write_count; 200260ce86c7SWei Liu size_t offset = 7; 200360ce86c7SWei Liu 200460ce86c7SWei Liu 20057e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 200660ce86c7SWei Liu err = -ENOSPC; 200760ce86c7SWei Liu goto out; 200860ce86c7SWei Liu } 20097e55d65cSLi Qiang write_count = fidp->fs.xattr.len - off; 20107e55d65cSLi Qiang if (write_count > count) { 20117e55d65cSLi Qiang write_count = count; 20127e55d65cSLi Qiang } 201360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 201460ce86c7SWei Liu if (err < 0) { 201560ce86c7SWei Liu return err; 201660ce86c7SWei Liu } 201760ce86c7SWei Liu err += offset; 201860ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 201960ce86c7SWei Liu /* 202060ce86c7SWei Liu * Now copy the content from sg list 202160ce86c7SWei Liu */ 202260ce86c7SWei Liu for (i = 0; i < cnt; i++) { 202360ce86c7SWei Liu if (write_count > sg[i].iov_len) { 202460ce86c7SWei Liu to_copy = sg[i].iov_len; 202560ce86c7SWei Liu } else { 202660ce86c7SWei Liu to_copy = write_count; 202760ce86c7SWei Liu } 202860ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 202960ce86c7SWei Liu /* updating vs->off since we are not using below */ 203060ce86c7SWei Liu off += to_copy; 203160ce86c7SWei Liu write_count -= to_copy; 203260ce86c7SWei Liu } 203360ce86c7SWei Liu out: 203460ce86c7SWei Liu return err; 203560ce86c7SWei Liu } 203660ce86c7SWei Liu 20378440e22eSGreg Kurz static void coroutine_fn v9fs_write(void *opaque) 203860ce86c7SWei Liu { 203960ce86c7SWei Liu ssize_t err; 204060ce86c7SWei Liu int32_t fid; 204160ce86c7SWei Liu uint64_t off; 204260ce86c7SWei Liu uint32_t count; 204360ce86c7SWei Liu int32_t len = 0; 204460ce86c7SWei Liu int32_t total = 0; 204560ce86c7SWei Liu size_t offset = 7; 204660ce86c7SWei Liu V9fsFidState *fidp; 204760ce86c7SWei Liu V9fsPDU *pdu = opaque; 204860ce86c7SWei Liu V9fsState *s = pdu->s; 204960ce86c7SWei Liu QEMUIOVector qiov_full; 205060ce86c7SWei Liu QEMUIOVector qiov; 205160ce86c7SWei Liu 205260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 205360ce86c7SWei Liu if (err < 0) { 205460ce86c7SWei Liu pdu_complete(pdu, err); 205560ce86c7SWei Liu return; 205660ce86c7SWei Liu } 205760ce86c7SWei Liu offset += err; 205860ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 205960ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 206060ce86c7SWei Liu 206160ce86c7SWei Liu fidp = get_fid(pdu, fid); 206260ce86c7SWei Liu if (fidp == NULL) { 206360ce86c7SWei Liu err = -EINVAL; 206460ce86c7SWei Liu goto out_nofid; 206560ce86c7SWei Liu } 206660ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 206760ce86c7SWei Liu if (fidp->fs.fd == -1) { 206860ce86c7SWei Liu err = -EINVAL; 206960ce86c7SWei Liu goto out; 207060ce86c7SWei Liu } 207160ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 207260ce86c7SWei Liu /* 207360ce86c7SWei Liu * setxattr operation 207460ce86c7SWei Liu */ 207560ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 207660ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 207760ce86c7SWei Liu goto out; 207860ce86c7SWei Liu } else { 207960ce86c7SWei Liu err = -EINVAL; 208060ce86c7SWei Liu goto out; 208160ce86c7SWei Liu } 208260ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 208360ce86c7SWei Liu do { 208460ce86c7SWei Liu qemu_iovec_reset(&qiov); 208560ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 208660ce86c7SWei Liu if (0) { 208760ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 208860ce86c7SWei Liu } 208960ce86c7SWei Liu /* Loop in case of EINTR */ 209060ce86c7SWei Liu do { 209160ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 209260ce86c7SWei Liu if (len >= 0) { 209360ce86c7SWei Liu off += len; 209460ce86c7SWei Liu total += len; 209560ce86c7SWei Liu } 209660ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 209760ce86c7SWei Liu if (len < 0) { 209860ce86c7SWei Liu /* IO error return the error */ 209960ce86c7SWei Liu err = len; 210060ce86c7SWei Liu goto out_qiov; 210160ce86c7SWei Liu } 210260ce86c7SWei Liu } while (total < count && len > 0); 210360ce86c7SWei Liu 210460ce86c7SWei Liu offset = 7; 210560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 210660ce86c7SWei Liu if (err < 0) { 2107fdfcc9aeSLi Qiang goto out_qiov; 210860ce86c7SWei Liu } 210960ce86c7SWei Liu err += offset; 211060ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 211160ce86c7SWei Liu out_qiov: 211260ce86c7SWei Liu qemu_iovec_destroy(&qiov); 211360ce86c7SWei Liu out: 211460ce86c7SWei Liu put_fid(pdu, fidp); 211560ce86c7SWei Liu out_nofid: 211660ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 211760ce86c7SWei Liu pdu_complete(pdu, err); 211860ce86c7SWei Liu } 211960ce86c7SWei Liu 21208440e22eSGreg Kurz static void coroutine_fn v9fs_create(void *opaque) 212160ce86c7SWei Liu { 212260ce86c7SWei Liu int32_t fid; 212360ce86c7SWei Liu int err = 0; 212460ce86c7SWei Liu size_t offset = 7; 212560ce86c7SWei Liu V9fsFidState *fidp; 212660ce86c7SWei Liu V9fsQID qid; 212760ce86c7SWei Liu int32_t perm; 212860ce86c7SWei Liu int8_t mode; 212960ce86c7SWei Liu V9fsPath path; 213060ce86c7SWei Liu struct stat stbuf; 213160ce86c7SWei Liu V9fsString name; 213260ce86c7SWei Liu V9fsString extension; 213360ce86c7SWei Liu int iounit; 213460ce86c7SWei Liu V9fsPDU *pdu = opaque; 213560ce86c7SWei Liu 213660ce86c7SWei Liu v9fs_path_init(&path); 213760ce86c7SWei Liu v9fs_string_init(&name); 213860ce86c7SWei Liu v9fs_string_init(&extension); 213960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 214060ce86c7SWei Liu &perm, &mode, &extension); 214160ce86c7SWei Liu if (err < 0) { 214260ce86c7SWei Liu goto out_nofid; 214360ce86c7SWei Liu } 214460ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 214560ce86c7SWei Liu 2146fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2147fff39a7aSGreg Kurz err = -ENOENT; 2148fff39a7aSGreg Kurz goto out_nofid; 2149fff39a7aSGreg Kurz } 2150fff39a7aSGreg Kurz 2151805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2152805b5d98SGreg Kurz err = -EEXIST; 2153805b5d98SGreg Kurz goto out_nofid; 2154805b5d98SGreg Kurz } 2155805b5d98SGreg Kurz 215660ce86c7SWei Liu fidp = get_fid(pdu, fid); 215760ce86c7SWei Liu if (fidp == NULL) { 215860ce86c7SWei Liu err = -EINVAL; 215960ce86c7SWei Liu goto out_nofid; 216060ce86c7SWei Liu } 2161d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 2162d63fb193SLi Qiang err = -EINVAL; 2163d63fb193SLi Qiang goto out; 2164d63fb193SLi Qiang } 216560ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 216660ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 216760ce86c7SWei Liu fidp->uid, -1, &stbuf); 216860ce86c7SWei Liu if (err < 0) { 216960ce86c7SWei Liu goto out; 217060ce86c7SWei Liu } 217160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 217260ce86c7SWei Liu if (err < 0) { 217360ce86c7SWei Liu goto out; 217460ce86c7SWei Liu } 217560ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 217660ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 217760ce86c7SWei Liu if (err < 0) { 217860ce86c7SWei Liu goto out; 217960ce86c7SWei Liu } 218060ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 218160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 218260ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 218360ce86c7SWei Liu extension.data, -1 , &stbuf); 218460ce86c7SWei Liu if (err < 0) { 218560ce86c7SWei Liu goto out; 218660ce86c7SWei Liu } 218760ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 218860ce86c7SWei Liu if (err < 0) { 218960ce86c7SWei Liu goto out; 219060ce86c7SWei Liu } 219160ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 219260ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 219360ce86c7SWei Liu int32_t ofid = atoi(extension.data); 219460ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 219560ce86c7SWei Liu if (ofidp == NULL) { 219660ce86c7SWei Liu err = -EINVAL; 219760ce86c7SWei Liu goto out; 219860ce86c7SWei Liu } 219960ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 220060ce86c7SWei Liu put_fid(pdu, ofidp); 220160ce86c7SWei Liu if (err < 0) { 220260ce86c7SWei Liu goto out; 220360ce86c7SWei Liu } 220460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 220560ce86c7SWei Liu if (err < 0) { 220660ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 220760ce86c7SWei Liu goto out; 220860ce86c7SWei Liu } 220960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 221060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 221160ce86c7SWei Liu if (err < 0) { 221260ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 221360ce86c7SWei Liu goto out; 221460ce86c7SWei Liu } 221560ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 221660ce86c7SWei Liu char ctype; 221760ce86c7SWei Liu uint32_t major, minor; 221860ce86c7SWei Liu mode_t nmode = 0; 221960ce86c7SWei Liu 222060ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 222160ce86c7SWei Liu err = -errno; 222260ce86c7SWei Liu goto out; 222360ce86c7SWei Liu } 222460ce86c7SWei Liu 222560ce86c7SWei Liu switch (ctype) { 222660ce86c7SWei Liu case 'c': 222760ce86c7SWei Liu nmode = S_IFCHR; 222860ce86c7SWei Liu break; 222960ce86c7SWei Liu case 'b': 223060ce86c7SWei Liu nmode = S_IFBLK; 223160ce86c7SWei Liu break; 223260ce86c7SWei Liu default: 223360ce86c7SWei Liu err = -EIO; 223460ce86c7SWei Liu goto out; 223560ce86c7SWei Liu } 223660ce86c7SWei Liu 223760ce86c7SWei Liu nmode |= perm & 0777; 223860ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 223960ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 224060ce86c7SWei Liu if (err < 0) { 224160ce86c7SWei Liu goto out; 224260ce86c7SWei Liu } 224360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 224460ce86c7SWei Liu if (err < 0) { 224560ce86c7SWei Liu goto out; 224660ce86c7SWei Liu } 224760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 224860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 224960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 225060ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 225160ce86c7SWei Liu if (err < 0) { 225260ce86c7SWei Liu goto out; 225360ce86c7SWei Liu } 225460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 225560ce86c7SWei Liu if (err < 0) { 225660ce86c7SWei Liu goto out; 225760ce86c7SWei Liu } 225860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 225960ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 226060ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 226160ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 226260ce86c7SWei Liu if (err < 0) { 226360ce86c7SWei Liu goto out; 226460ce86c7SWei Liu } 226560ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 226660ce86c7SWei Liu if (err < 0) { 226760ce86c7SWei Liu goto out; 226860ce86c7SWei Liu } 226960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 227060ce86c7SWei Liu } else { 227160ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 227260ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 227360ce86c7SWei Liu if (err < 0) { 227460ce86c7SWei Liu goto out; 227560ce86c7SWei Liu } 227660ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 227760ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 227860ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 227960ce86c7SWei Liu /* 228060ce86c7SWei Liu * We let the host file system do O_EXCL check 228160ce86c7SWei Liu * We should not reclaim such fd 228260ce86c7SWei Liu */ 228360ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 228460ce86c7SWei Liu } 228560ce86c7SWei Liu } 228660ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 228760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 228860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 228960ce86c7SWei Liu if (err < 0) { 229060ce86c7SWei Liu goto out; 229160ce86c7SWei Liu } 229260ce86c7SWei Liu err += offset; 229360ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 229460ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 229560ce86c7SWei Liu out: 229660ce86c7SWei Liu put_fid(pdu, fidp); 229760ce86c7SWei Liu out_nofid: 229860ce86c7SWei Liu pdu_complete(pdu, err); 229960ce86c7SWei Liu v9fs_string_free(&name); 230060ce86c7SWei Liu v9fs_string_free(&extension); 230160ce86c7SWei Liu v9fs_path_free(&path); 230260ce86c7SWei Liu } 230360ce86c7SWei Liu 23048440e22eSGreg Kurz static void coroutine_fn v9fs_symlink(void *opaque) 230560ce86c7SWei Liu { 230660ce86c7SWei Liu V9fsPDU *pdu = opaque; 230760ce86c7SWei Liu V9fsString name; 230860ce86c7SWei Liu V9fsString symname; 230960ce86c7SWei Liu V9fsFidState *dfidp; 231060ce86c7SWei Liu V9fsQID qid; 231160ce86c7SWei Liu struct stat stbuf; 231260ce86c7SWei Liu int32_t dfid; 231360ce86c7SWei Liu int err = 0; 231460ce86c7SWei Liu gid_t gid; 231560ce86c7SWei Liu size_t offset = 7; 231660ce86c7SWei Liu 231760ce86c7SWei Liu v9fs_string_init(&name); 231860ce86c7SWei Liu v9fs_string_init(&symname); 231960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 232060ce86c7SWei Liu if (err < 0) { 232160ce86c7SWei Liu goto out_nofid; 232260ce86c7SWei Liu } 232360ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 232460ce86c7SWei Liu 2325fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2326fff39a7aSGreg Kurz err = -ENOENT; 2327fff39a7aSGreg Kurz goto out_nofid; 2328fff39a7aSGreg Kurz } 2329fff39a7aSGreg Kurz 2330805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2331805b5d98SGreg Kurz err = -EEXIST; 2332805b5d98SGreg Kurz goto out_nofid; 2333805b5d98SGreg Kurz } 2334805b5d98SGreg Kurz 233560ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 233660ce86c7SWei Liu if (dfidp == NULL) { 233760ce86c7SWei Liu err = -EINVAL; 233860ce86c7SWei Liu goto out_nofid; 233960ce86c7SWei Liu } 234060ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 234160ce86c7SWei Liu if (err < 0) { 234260ce86c7SWei Liu goto out; 234360ce86c7SWei Liu } 234460ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 234560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 234660ce86c7SWei Liu if (err < 0) { 234760ce86c7SWei Liu goto out; 234860ce86c7SWei Liu } 234960ce86c7SWei Liu err += offset; 235060ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 235160ce86c7SWei Liu qid.type, qid.version, qid.path); 235260ce86c7SWei Liu out: 235360ce86c7SWei Liu put_fid(pdu, dfidp); 235460ce86c7SWei Liu out_nofid: 235560ce86c7SWei Liu pdu_complete(pdu, err); 235660ce86c7SWei Liu v9fs_string_free(&name); 235760ce86c7SWei Liu v9fs_string_free(&symname); 235860ce86c7SWei Liu } 235960ce86c7SWei Liu 2360a1bf8b74SGreg Kurz static void coroutine_fn v9fs_flush(void *opaque) 236160ce86c7SWei Liu { 236260ce86c7SWei Liu ssize_t err; 236360ce86c7SWei Liu int16_t tag; 236460ce86c7SWei Liu size_t offset = 7; 2365d5f2af7bSGreg Kurz V9fsPDU *cancel_pdu = NULL; 236660ce86c7SWei Liu V9fsPDU *pdu = opaque; 236760ce86c7SWei Liu V9fsState *s = pdu->s; 236860ce86c7SWei Liu 236960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 237060ce86c7SWei Liu if (err < 0) { 237160ce86c7SWei Liu pdu_complete(pdu, err); 237260ce86c7SWei Liu return; 237360ce86c7SWei Liu } 237460ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 237560ce86c7SWei Liu 2376d5f2af7bSGreg Kurz if (pdu->tag == tag) { 2377d5f2af7bSGreg Kurz error_report("Warning: the guest sent a self-referencing 9P flush request"); 2378d5f2af7bSGreg Kurz } else { 237960ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 238060ce86c7SWei Liu if (cancel_pdu->tag == tag) { 238160ce86c7SWei Liu break; 238260ce86c7SWei Liu } 238360ce86c7SWei Liu } 2384d5f2af7bSGreg Kurz } 238560ce86c7SWei Liu if (cancel_pdu) { 238660ce86c7SWei Liu cancel_pdu->cancelled = 1; 238760ce86c7SWei Liu /* 238860ce86c7SWei Liu * Wait for pdu to complete. 238960ce86c7SWei Liu */ 23901ace7ceaSPaolo Bonzini qemu_co_queue_wait(&cancel_pdu->complete, NULL); 239118adde86SGreg Kurz if (!qemu_co_queue_next(&cancel_pdu->complete)) { 239260ce86c7SWei Liu cancel_pdu->cancelled = 0; 239360ce86c7SWei Liu pdu_free(cancel_pdu); 239460ce86c7SWei Liu } 239518adde86SGreg Kurz } 239660ce86c7SWei Liu pdu_complete(pdu, 7); 239760ce86c7SWei Liu } 239860ce86c7SWei Liu 23998440e22eSGreg Kurz static void coroutine_fn v9fs_link(void *opaque) 240060ce86c7SWei Liu { 240160ce86c7SWei Liu V9fsPDU *pdu = opaque; 240260ce86c7SWei Liu int32_t dfid, oldfid; 240360ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 240460ce86c7SWei Liu V9fsString name; 240560ce86c7SWei Liu size_t offset = 7; 240660ce86c7SWei Liu int err = 0; 240760ce86c7SWei Liu 240860ce86c7SWei Liu v9fs_string_init(&name); 240960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 241060ce86c7SWei Liu if (err < 0) { 241160ce86c7SWei Liu goto out_nofid; 241260ce86c7SWei Liu } 241360ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 241460ce86c7SWei Liu 2415fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2416fff39a7aSGreg Kurz err = -ENOENT; 2417fff39a7aSGreg Kurz goto out_nofid; 2418fff39a7aSGreg Kurz } 2419fff39a7aSGreg Kurz 2420805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2421805b5d98SGreg Kurz err = -EEXIST; 2422805b5d98SGreg Kurz goto out_nofid; 2423805b5d98SGreg Kurz } 2424805b5d98SGreg Kurz 242560ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 242660ce86c7SWei Liu if (dfidp == NULL) { 242760ce86c7SWei Liu err = -ENOENT; 242860ce86c7SWei Liu goto out_nofid; 242960ce86c7SWei Liu } 243060ce86c7SWei Liu 243160ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 243260ce86c7SWei Liu if (oldfidp == NULL) { 243360ce86c7SWei Liu err = -ENOENT; 243460ce86c7SWei Liu goto out; 243560ce86c7SWei Liu } 243660ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 243760ce86c7SWei Liu if (!err) { 243860ce86c7SWei Liu err = offset; 243960ce86c7SWei Liu } 24404c158678SLi Qiang put_fid(pdu, oldfidp); 244160ce86c7SWei Liu out: 244260ce86c7SWei Liu put_fid(pdu, dfidp); 244360ce86c7SWei Liu out_nofid: 244460ce86c7SWei Liu v9fs_string_free(&name); 244560ce86c7SWei Liu pdu_complete(pdu, err); 244660ce86c7SWei Liu } 244760ce86c7SWei Liu 244860ce86c7SWei Liu /* Only works with path name based fid */ 24498440e22eSGreg Kurz static void coroutine_fn v9fs_remove(void *opaque) 245060ce86c7SWei Liu { 245160ce86c7SWei Liu int32_t fid; 245260ce86c7SWei Liu int err = 0; 245360ce86c7SWei Liu size_t offset = 7; 245460ce86c7SWei Liu V9fsFidState *fidp; 245560ce86c7SWei Liu V9fsPDU *pdu = opaque; 245660ce86c7SWei Liu 245760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 245860ce86c7SWei Liu if (err < 0) { 245960ce86c7SWei Liu goto out_nofid; 246060ce86c7SWei Liu } 246160ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 246260ce86c7SWei Liu 246360ce86c7SWei Liu fidp = get_fid(pdu, fid); 246460ce86c7SWei Liu if (fidp == NULL) { 246560ce86c7SWei Liu err = -EINVAL; 246660ce86c7SWei Liu goto out_nofid; 246760ce86c7SWei Liu } 246860ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 246960ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 247060ce86c7SWei Liu err = -EOPNOTSUPP; 247160ce86c7SWei Liu goto out_err; 247260ce86c7SWei Liu } 247360ce86c7SWei Liu /* 247460ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 247560ce86c7SWei Liu * the file later. So don't reclaim fd 247660ce86c7SWei Liu */ 247760ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 247860ce86c7SWei Liu if (err < 0) { 247960ce86c7SWei Liu goto out_err; 248060ce86c7SWei Liu } 248160ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 248260ce86c7SWei Liu if (!err) { 248360ce86c7SWei Liu err = offset; 248460ce86c7SWei Liu } 248560ce86c7SWei Liu out_err: 248660ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 248760ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 248860ce86c7SWei Liu put_fid(pdu, fidp); 248960ce86c7SWei Liu out_nofid: 249060ce86c7SWei Liu pdu_complete(pdu, err); 249160ce86c7SWei Liu } 249260ce86c7SWei Liu 24938440e22eSGreg Kurz static void coroutine_fn v9fs_unlinkat(void *opaque) 249460ce86c7SWei Liu { 249560ce86c7SWei Liu int err = 0; 249660ce86c7SWei Liu V9fsString name; 249760ce86c7SWei Liu int32_t dfid, flags; 249860ce86c7SWei Liu size_t offset = 7; 249960ce86c7SWei Liu V9fsPath path; 250060ce86c7SWei Liu V9fsFidState *dfidp; 250160ce86c7SWei Liu V9fsPDU *pdu = opaque; 250260ce86c7SWei Liu 250360ce86c7SWei Liu v9fs_string_init(&name); 250460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 250560ce86c7SWei Liu if (err < 0) { 250660ce86c7SWei Liu goto out_nofid; 250760ce86c7SWei Liu } 2508fff39a7aSGreg Kurz 2509fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2510fff39a7aSGreg Kurz err = -ENOENT; 2511fff39a7aSGreg Kurz goto out_nofid; 2512fff39a7aSGreg Kurz } 2513fff39a7aSGreg Kurz 2514805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2515805b5d98SGreg Kurz err = -EINVAL; 2516805b5d98SGreg Kurz goto out_nofid; 2517805b5d98SGreg Kurz } 2518805b5d98SGreg Kurz 2519805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2520805b5d98SGreg Kurz err = -ENOTEMPTY; 2521805b5d98SGreg Kurz goto out_nofid; 2522805b5d98SGreg Kurz } 2523805b5d98SGreg Kurz 252460ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 252560ce86c7SWei Liu if (dfidp == NULL) { 252660ce86c7SWei Liu err = -EINVAL; 252760ce86c7SWei Liu goto out_nofid; 252860ce86c7SWei Liu } 252960ce86c7SWei Liu /* 253060ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 253160ce86c7SWei Liu * the file later. So don't reclaim fd 253260ce86c7SWei Liu */ 253360ce86c7SWei Liu v9fs_path_init(&path); 253460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 253560ce86c7SWei Liu if (err < 0) { 253660ce86c7SWei Liu goto out_err; 253760ce86c7SWei Liu } 253860ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 253960ce86c7SWei Liu if (err < 0) { 254060ce86c7SWei Liu goto out_err; 254160ce86c7SWei Liu } 254260ce86c7SWei Liu err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); 254360ce86c7SWei Liu if (!err) { 254460ce86c7SWei Liu err = offset; 254560ce86c7SWei Liu } 254660ce86c7SWei Liu out_err: 254760ce86c7SWei Liu put_fid(pdu, dfidp); 254860ce86c7SWei Liu v9fs_path_free(&path); 254960ce86c7SWei Liu out_nofid: 255060ce86c7SWei Liu pdu_complete(pdu, err); 255160ce86c7SWei Liu v9fs_string_free(&name); 255260ce86c7SWei Liu } 255360ce86c7SWei Liu 255460ce86c7SWei Liu 255560ce86c7SWei Liu /* Only works with path name based fid */ 25568440e22eSGreg Kurz static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 25578440e22eSGreg Kurz int32_t newdirfid, 25588440e22eSGreg Kurz V9fsString *name) 255960ce86c7SWei Liu { 256060ce86c7SWei Liu char *end; 256160ce86c7SWei Liu int err = 0; 256260ce86c7SWei Liu V9fsPath new_path; 256360ce86c7SWei Liu V9fsFidState *tfidp; 256460ce86c7SWei Liu V9fsState *s = pdu->s; 256560ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 256660ce86c7SWei Liu char *old_name, *new_name; 256760ce86c7SWei Liu 256860ce86c7SWei Liu v9fs_path_init(&new_path); 256960ce86c7SWei Liu if (newdirfid != -1) { 257060ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 257160ce86c7SWei Liu if (dirfidp == NULL) { 257260ce86c7SWei Liu err = -ENOENT; 257360ce86c7SWei Liu goto out_nofid; 257460ce86c7SWei Liu } 257549dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 257649dd946bSGreg Kurz err = -EINVAL; 257749dd946bSGreg Kurz goto out; 257849dd946bSGreg Kurz } 257960ce86c7SWei Liu v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 258060ce86c7SWei Liu } else { 258160ce86c7SWei Liu old_name = fidp->path.data; 258260ce86c7SWei Liu end = strrchr(old_name, '/'); 258360ce86c7SWei Liu if (end) { 258460ce86c7SWei Liu end++; 258560ce86c7SWei Liu } else { 258660ce86c7SWei Liu end = old_name; 258760ce86c7SWei Liu } 258860ce86c7SWei Liu new_name = g_malloc0(end - old_name + name->size + 1); 258960ce86c7SWei Liu strncat(new_name, old_name, end - old_name); 259060ce86c7SWei Liu strncat(new_name + (end - old_name), name->data, name->size); 259160ce86c7SWei Liu v9fs_co_name_to_path(pdu, NULL, new_name, &new_path); 259260ce86c7SWei Liu g_free(new_name); 259360ce86c7SWei Liu } 259460ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 259560ce86c7SWei Liu if (err < 0) { 259660ce86c7SWei Liu goto out; 259760ce86c7SWei Liu } 259860ce86c7SWei Liu /* 259960ce86c7SWei Liu * Fixup fid's pointing to the old name to 260060ce86c7SWei Liu * start pointing to the new name 260160ce86c7SWei Liu */ 260260ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 260360ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 260460ce86c7SWei Liu /* replace the name */ 260560ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 260660ce86c7SWei Liu } 260760ce86c7SWei Liu } 260860ce86c7SWei Liu out: 260960ce86c7SWei Liu if (dirfidp) { 261060ce86c7SWei Liu put_fid(pdu, dirfidp); 261160ce86c7SWei Liu } 261260ce86c7SWei Liu v9fs_path_free(&new_path); 261360ce86c7SWei Liu out_nofid: 261460ce86c7SWei Liu return err; 261560ce86c7SWei Liu } 261660ce86c7SWei Liu 261760ce86c7SWei Liu /* Only works with path name based fid */ 26188440e22eSGreg Kurz static void coroutine_fn v9fs_rename(void *opaque) 261960ce86c7SWei Liu { 262060ce86c7SWei Liu int32_t fid; 262160ce86c7SWei Liu ssize_t err = 0; 262260ce86c7SWei Liu size_t offset = 7; 262360ce86c7SWei Liu V9fsString name; 262460ce86c7SWei Liu int32_t newdirfid; 262560ce86c7SWei Liu V9fsFidState *fidp; 262660ce86c7SWei Liu V9fsPDU *pdu = opaque; 262760ce86c7SWei Liu V9fsState *s = pdu->s; 262860ce86c7SWei Liu 262960ce86c7SWei Liu v9fs_string_init(&name); 263060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 263160ce86c7SWei Liu if (err < 0) { 263260ce86c7SWei Liu goto out_nofid; 263360ce86c7SWei Liu } 2634fff39a7aSGreg Kurz 2635fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2636fff39a7aSGreg Kurz err = -ENOENT; 2637fff39a7aSGreg Kurz goto out_nofid; 2638fff39a7aSGreg Kurz } 2639fff39a7aSGreg Kurz 2640805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2641805b5d98SGreg Kurz err = -EISDIR; 2642805b5d98SGreg Kurz goto out_nofid; 2643805b5d98SGreg Kurz } 2644805b5d98SGreg Kurz 264560ce86c7SWei Liu fidp = get_fid(pdu, fid); 264660ce86c7SWei Liu if (fidp == NULL) { 264760ce86c7SWei Liu err = -ENOENT; 264860ce86c7SWei Liu goto out_nofid; 264960ce86c7SWei Liu } 265049dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 265149dd946bSGreg Kurz err = -EINVAL; 265249dd946bSGreg Kurz goto out; 265349dd946bSGreg Kurz } 265460ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 265560ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 265660ce86c7SWei Liu err = -EOPNOTSUPP; 265760ce86c7SWei Liu goto out; 265860ce86c7SWei Liu } 265960ce86c7SWei Liu v9fs_path_write_lock(s); 266060ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 266160ce86c7SWei Liu v9fs_path_unlock(s); 266260ce86c7SWei Liu if (!err) { 266360ce86c7SWei Liu err = offset; 266460ce86c7SWei Liu } 266560ce86c7SWei Liu out: 266660ce86c7SWei Liu put_fid(pdu, fidp); 266760ce86c7SWei Liu out_nofid: 266860ce86c7SWei Liu pdu_complete(pdu, err); 266960ce86c7SWei Liu v9fs_string_free(&name); 267060ce86c7SWei Liu } 267160ce86c7SWei Liu 26728440e22eSGreg Kurz static void coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 26738440e22eSGreg Kurz V9fsString *old_name, 26748440e22eSGreg Kurz V9fsPath *newdir, 267560ce86c7SWei Liu V9fsString *new_name) 267660ce86c7SWei Liu { 267760ce86c7SWei Liu V9fsFidState *tfidp; 267860ce86c7SWei Liu V9fsPath oldpath, newpath; 267960ce86c7SWei Liu V9fsState *s = pdu->s; 268060ce86c7SWei Liu 268160ce86c7SWei Liu 268260ce86c7SWei Liu v9fs_path_init(&oldpath); 268360ce86c7SWei Liu v9fs_path_init(&newpath); 268460ce86c7SWei Liu v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 268560ce86c7SWei Liu v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 268660ce86c7SWei Liu 268760ce86c7SWei Liu /* 268860ce86c7SWei Liu * Fixup fid's pointing to the old name to 268960ce86c7SWei Liu * start pointing to the new name 269060ce86c7SWei Liu */ 269160ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 269260ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 269360ce86c7SWei Liu /* replace the name */ 269460ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 269560ce86c7SWei Liu } 269660ce86c7SWei Liu } 269760ce86c7SWei Liu v9fs_path_free(&oldpath); 269860ce86c7SWei Liu v9fs_path_free(&newpath); 269960ce86c7SWei Liu } 270060ce86c7SWei Liu 27018440e22eSGreg Kurz static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 27028440e22eSGreg Kurz V9fsString *old_name, 27038440e22eSGreg Kurz int32_t newdirfid, 270460ce86c7SWei Liu V9fsString *new_name) 270560ce86c7SWei Liu { 270660ce86c7SWei Liu int err = 0; 270760ce86c7SWei Liu V9fsState *s = pdu->s; 270860ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 270960ce86c7SWei Liu 271060ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 271160ce86c7SWei Liu if (olddirfidp == NULL) { 271260ce86c7SWei Liu err = -ENOENT; 271360ce86c7SWei Liu goto out; 271460ce86c7SWei Liu } 271560ce86c7SWei Liu if (newdirfid != -1) { 271660ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 271760ce86c7SWei Liu if (newdirfidp == NULL) { 271860ce86c7SWei Liu err = -ENOENT; 271960ce86c7SWei Liu goto out; 272060ce86c7SWei Liu } 272160ce86c7SWei Liu } else { 272260ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 272360ce86c7SWei Liu } 272460ce86c7SWei Liu 272560ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 272660ce86c7SWei Liu &newdirfidp->path, new_name); 272760ce86c7SWei Liu if (err < 0) { 272860ce86c7SWei Liu goto out; 272960ce86c7SWei Liu } 273060ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 273160ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 273260ce86c7SWei Liu v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 273360ce86c7SWei Liu &newdirfidp->path, new_name); 273460ce86c7SWei Liu } 273560ce86c7SWei Liu out: 273660ce86c7SWei Liu if (olddirfidp) { 273760ce86c7SWei Liu put_fid(pdu, olddirfidp); 273860ce86c7SWei Liu } 273960ce86c7SWei Liu if (newdirfidp) { 274060ce86c7SWei Liu put_fid(pdu, newdirfidp); 274160ce86c7SWei Liu } 274260ce86c7SWei Liu return err; 274360ce86c7SWei Liu } 274460ce86c7SWei Liu 27458440e22eSGreg Kurz static void coroutine_fn v9fs_renameat(void *opaque) 274660ce86c7SWei Liu { 274760ce86c7SWei Liu ssize_t err = 0; 274860ce86c7SWei Liu size_t offset = 7; 274960ce86c7SWei Liu V9fsPDU *pdu = opaque; 275060ce86c7SWei Liu V9fsState *s = pdu->s; 275160ce86c7SWei Liu int32_t olddirfid, newdirfid; 275260ce86c7SWei Liu V9fsString old_name, new_name; 275360ce86c7SWei Liu 275460ce86c7SWei Liu v9fs_string_init(&old_name); 275560ce86c7SWei Liu v9fs_string_init(&new_name); 275660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 275760ce86c7SWei Liu &old_name, &newdirfid, &new_name); 275860ce86c7SWei Liu if (err < 0) { 275960ce86c7SWei Liu goto out_err; 276060ce86c7SWei Liu } 276160ce86c7SWei Liu 2762fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 2763fff39a7aSGreg Kurz err = -ENOENT; 2764fff39a7aSGreg Kurz goto out_err; 2765fff39a7aSGreg Kurz } 2766fff39a7aSGreg Kurz 2767805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 2768805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 2769805b5d98SGreg Kurz err = -EISDIR; 2770805b5d98SGreg Kurz goto out_err; 2771805b5d98SGreg Kurz } 2772805b5d98SGreg Kurz 277360ce86c7SWei Liu v9fs_path_write_lock(s); 277460ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 277560ce86c7SWei Liu &old_name, newdirfid, &new_name); 277660ce86c7SWei Liu v9fs_path_unlock(s); 277760ce86c7SWei Liu if (!err) { 277860ce86c7SWei Liu err = offset; 277960ce86c7SWei Liu } 278060ce86c7SWei Liu 278160ce86c7SWei Liu out_err: 278260ce86c7SWei Liu pdu_complete(pdu, err); 278360ce86c7SWei Liu v9fs_string_free(&old_name); 278460ce86c7SWei Liu v9fs_string_free(&new_name); 278560ce86c7SWei Liu } 278660ce86c7SWei Liu 27878440e22eSGreg Kurz static void coroutine_fn v9fs_wstat(void *opaque) 278860ce86c7SWei Liu { 278960ce86c7SWei Liu int32_t fid; 279060ce86c7SWei Liu int err = 0; 279160ce86c7SWei Liu int16_t unused; 279260ce86c7SWei Liu V9fsStat v9stat; 279360ce86c7SWei Liu size_t offset = 7; 279460ce86c7SWei Liu struct stat stbuf; 279560ce86c7SWei Liu V9fsFidState *fidp; 279660ce86c7SWei Liu V9fsPDU *pdu = opaque; 279760ce86c7SWei Liu 279860ce86c7SWei Liu v9fs_stat_init(&v9stat); 279960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 280060ce86c7SWei Liu if (err < 0) { 280160ce86c7SWei Liu goto out_nofid; 280260ce86c7SWei Liu } 280360ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 280460ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 280560ce86c7SWei Liu 280660ce86c7SWei Liu fidp = get_fid(pdu, fid); 280760ce86c7SWei Liu if (fidp == NULL) { 280860ce86c7SWei Liu err = -EINVAL; 280960ce86c7SWei Liu goto out_nofid; 281060ce86c7SWei Liu } 281160ce86c7SWei Liu /* do we need to sync the file? */ 281260ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 281360ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 281460ce86c7SWei Liu goto out; 281560ce86c7SWei Liu } 281660ce86c7SWei Liu if (v9stat.mode != -1) { 281760ce86c7SWei Liu uint32_t v9_mode; 281860ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 281960ce86c7SWei Liu if (err < 0) { 282060ce86c7SWei Liu goto out; 282160ce86c7SWei Liu } 282260ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 282360ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 282460ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 282560ce86c7SWei Liu /* Attempting to change the type */ 282660ce86c7SWei Liu err = -EIO; 282760ce86c7SWei Liu goto out; 282860ce86c7SWei Liu } 282960ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 283060ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 283160ce86c7SWei Liu &v9stat.extension)); 283260ce86c7SWei Liu if (err < 0) { 283360ce86c7SWei Liu goto out; 283460ce86c7SWei Liu } 283560ce86c7SWei Liu } 283660ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 283760ce86c7SWei Liu struct timespec times[2]; 283860ce86c7SWei Liu if (v9stat.atime != -1) { 283960ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 284060ce86c7SWei Liu times[0].tv_nsec = 0; 284160ce86c7SWei Liu } else { 284260ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 284360ce86c7SWei Liu } 284460ce86c7SWei Liu if (v9stat.mtime != -1) { 284560ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 284660ce86c7SWei Liu times[1].tv_nsec = 0; 284760ce86c7SWei Liu } else { 284860ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 284960ce86c7SWei Liu } 285060ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 285160ce86c7SWei Liu if (err < 0) { 285260ce86c7SWei Liu goto out; 285360ce86c7SWei Liu } 285460ce86c7SWei Liu } 285560ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 285660ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 285760ce86c7SWei Liu if (err < 0) { 285860ce86c7SWei Liu goto out; 285960ce86c7SWei Liu } 286060ce86c7SWei Liu } 286160ce86c7SWei Liu if (v9stat.name.size != 0) { 286260ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 286360ce86c7SWei Liu if (err < 0) { 286460ce86c7SWei Liu goto out; 286560ce86c7SWei Liu } 286660ce86c7SWei Liu } 286760ce86c7SWei Liu if (v9stat.length != -1) { 286860ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 286960ce86c7SWei Liu if (err < 0) { 287060ce86c7SWei Liu goto out; 287160ce86c7SWei Liu } 287260ce86c7SWei Liu } 287360ce86c7SWei Liu err = offset; 287460ce86c7SWei Liu out: 287560ce86c7SWei Liu put_fid(pdu, fidp); 287660ce86c7SWei Liu out_nofid: 287760ce86c7SWei Liu v9fs_stat_free(&v9stat); 287860ce86c7SWei Liu pdu_complete(pdu, err); 287960ce86c7SWei Liu } 288060ce86c7SWei Liu 288160ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 288260ce86c7SWei Liu { 288360ce86c7SWei Liu uint32_t f_type; 288460ce86c7SWei Liu uint32_t f_bsize; 288560ce86c7SWei Liu uint64_t f_blocks; 288660ce86c7SWei Liu uint64_t f_bfree; 288760ce86c7SWei Liu uint64_t f_bavail; 288860ce86c7SWei Liu uint64_t f_files; 288960ce86c7SWei Liu uint64_t f_ffree; 289060ce86c7SWei Liu uint64_t fsid_val; 289160ce86c7SWei Liu uint32_t f_namelen; 289260ce86c7SWei Liu size_t offset = 7; 289360ce86c7SWei Liu int32_t bsize_factor; 289460ce86c7SWei Liu 289560ce86c7SWei Liu /* 289660ce86c7SWei Liu * compute bsize factor based on host file system block size 289760ce86c7SWei Liu * and client msize 289860ce86c7SWei Liu */ 289960ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 290060ce86c7SWei Liu if (!bsize_factor) { 290160ce86c7SWei Liu bsize_factor = 1; 290260ce86c7SWei Liu } 290360ce86c7SWei Liu f_type = stbuf->f_type; 290460ce86c7SWei Liu f_bsize = stbuf->f_bsize; 290560ce86c7SWei Liu f_bsize *= bsize_factor; 290660ce86c7SWei Liu /* 290760ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 290860ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 290960ce86c7SWei Liu * blocks by bsize factor 291060ce86c7SWei Liu */ 291160ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 291260ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 291360ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 291460ce86c7SWei Liu f_files = stbuf->f_files; 291560ce86c7SWei Liu f_ffree = stbuf->f_ffree; 291660ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 291760ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 291860ce86c7SWei Liu f_namelen = stbuf->f_namelen; 291960ce86c7SWei Liu 292060ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 292160ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 292260ce86c7SWei Liu f_bavail, f_files, f_ffree, 292360ce86c7SWei Liu fsid_val, f_namelen); 292460ce86c7SWei Liu } 292560ce86c7SWei Liu 29268440e22eSGreg Kurz static void coroutine_fn v9fs_statfs(void *opaque) 292760ce86c7SWei Liu { 292860ce86c7SWei Liu int32_t fid; 292960ce86c7SWei Liu ssize_t retval = 0; 293060ce86c7SWei Liu size_t offset = 7; 293160ce86c7SWei Liu V9fsFidState *fidp; 293260ce86c7SWei Liu struct statfs stbuf; 293360ce86c7SWei Liu V9fsPDU *pdu = opaque; 293460ce86c7SWei Liu V9fsState *s = pdu->s; 293560ce86c7SWei Liu 293660ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 293760ce86c7SWei Liu if (retval < 0) { 293860ce86c7SWei Liu goto out_nofid; 293960ce86c7SWei Liu } 294060ce86c7SWei Liu fidp = get_fid(pdu, fid); 294160ce86c7SWei Liu if (fidp == NULL) { 294260ce86c7SWei Liu retval = -ENOENT; 294360ce86c7SWei Liu goto out_nofid; 294460ce86c7SWei Liu } 294560ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 294660ce86c7SWei Liu if (retval < 0) { 294760ce86c7SWei Liu goto out; 294860ce86c7SWei Liu } 294960ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 295060ce86c7SWei Liu if (retval < 0) { 295160ce86c7SWei Liu goto out; 295260ce86c7SWei Liu } 295360ce86c7SWei Liu retval += offset; 295460ce86c7SWei Liu out: 295560ce86c7SWei Liu put_fid(pdu, fidp); 295660ce86c7SWei Liu out_nofid: 295760ce86c7SWei Liu pdu_complete(pdu, retval); 295860ce86c7SWei Liu } 295960ce86c7SWei Liu 29608440e22eSGreg Kurz static void coroutine_fn v9fs_mknod(void *opaque) 296160ce86c7SWei Liu { 296260ce86c7SWei Liu 296360ce86c7SWei Liu int mode; 296460ce86c7SWei Liu gid_t gid; 296560ce86c7SWei Liu int32_t fid; 296660ce86c7SWei Liu V9fsQID qid; 296760ce86c7SWei Liu int err = 0; 296860ce86c7SWei Liu int major, minor; 296960ce86c7SWei Liu size_t offset = 7; 297060ce86c7SWei Liu V9fsString name; 297160ce86c7SWei Liu struct stat stbuf; 297260ce86c7SWei Liu V9fsFidState *fidp; 297360ce86c7SWei Liu V9fsPDU *pdu = opaque; 297460ce86c7SWei Liu 297560ce86c7SWei Liu v9fs_string_init(&name); 297660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 297760ce86c7SWei Liu &major, &minor, &gid); 297860ce86c7SWei Liu if (err < 0) { 297960ce86c7SWei Liu goto out_nofid; 298060ce86c7SWei Liu } 298160ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 298260ce86c7SWei Liu 2983fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2984fff39a7aSGreg Kurz err = -ENOENT; 2985fff39a7aSGreg Kurz goto out_nofid; 2986fff39a7aSGreg Kurz } 2987fff39a7aSGreg Kurz 2988805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2989805b5d98SGreg Kurz err = -EEXIST; 2990805b5d98SGreg Kurz goto out_nofid; 2991805b5d98SGreg Kurz } 2992805b5d98SGreg Kurz 299360ce86c7SWei Liu fidp = get_fid(pdu, fid); 299460ce86c7SWei Liu if (fidp == NULL) { 299560ce86c7SWei Liu err = -ENOENT; 299660ce86c7SWei Liu goto out_nofid; 299760ce86c7SWei Liu } 299860ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 299960ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 300060ce86c7SWei Liu if (err < 0) { 300160ce86c7SWei Liu goto out; 300260ce86c7SWei Liu } 300360ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 300460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 300560ce86c7SWei Liu if (err < 0) { 300660ce86c7SWei Liu goto out; 300760ce86c7SWei Liu } 300860ce86c7SWei Liu err += offset; 300960ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 301060ce86c7SWei Liu qid.type, qid.version, qid.path); 301160ce86c7SWei Liu out: 301260ce86c7SWei Liu put_fid(pdu, fidp); 301360ce86c7SWei Liu out_nofid: 301460ce86c7SWei Liu pdu_complete(pdu, err); 301560ce86c7SWei Liu v9fs_string_free(&name); 301660ce86c7SWei Liu } 301760ce86c7SWei Liu 301860ce86c7SWei Liu /* 301960ce86c7SWei Liu * Implement posix byte range locking code 302060ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 302160ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 302260ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 302360ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 302460ce86c7SWei Liu * So when a TLOCK request comes, always return success 302560ce86c7SWei Liu */ 30268440e22eSGreg Kurz static void coroutine_fn v9fs_lock(void *opaque) 302760ce86c7SWei Liu { 302860ce86c7SWei Liu V9fsFlock flock; 302960ce86c7SWei Liu size_t offset = 7; 303060ce86c7SWei Liu struct stat stbuf; 303160ce86c7SWei Liu V9fsFidState *fidp; 303260ce86c7SWei Liu int32_t fid, err = 0; 303360ce86c7SWei Liu V9fsPDU *pdu = opaque; 303460ce86c7SWei Liu 303560ce86c7SWei Liu v9fs_string_init(&flock.client_id); 303660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 303760ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 303860ce86c7SWei Liu &flock.proc_id, &flock.client_id); 303960ce86c7SWei Liu if (err < 0) { 304060ce86c7SWei Liu goto out_nofid; 304160ce86c7SWei Liu } 304260ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 304360ce86c7SWei Liu flock.type, flock.start, flock.length); 304460ce86c7SWei Liu 304560ce86c7SWei Liu 304660ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 304760ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 304860ce86c7SWei Liu err = -EINVAL; 304960ce86c7SWei Liu goto out_nofid; 305060ce86c7SWei Liu } 305160ce86c7SWei Liu fidp = get_fid(pdu, fid); 305260ce86c7SWei Liu if (fidp == NULL) { 305360ce86c7SWei Liu err = -ENOENT; 305460ce86c7SWei Liu goto out_nofid; 305560ce86c7SWei Liu } 305660ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 305760ce86c7SWei Liu if (err < 0) { 305860ce86c7SWei Liu goto out; 305960ce86c7SWei Liu } 30604bae2b39SPaolo Bonzini err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); 30614bae2b39SPaolo Bonzini if (err < 0) { 30624bae2b39SPaolo Bonzini goto out; 30634bae2b39SPaolo Bonzini } 30644bae2b39SPaolo Bonzini err += offset; 30654bae2b39SPaolo Bonzini trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); 306660ce86c7SWei Liu out: 306760ce86c7SWei Liu put_fid(pdu, fidp); 306860ce86c7SWei Liu out_nofid: 306960ce86c7SWei Liu pdu_complete(pdu, err); 307060ce86c7SWei Liu v9fs_string_free(&flock.client_id); 307160ce86c7SWei Liu } 307260ce86c7SWei Liu 307360ce86c7SWei Liu /* 307460ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 307560ce86c7SWei Liu * handling is done by client's VFS layer. 307660ce86c7SWei Liu */ 30778440e22eSGreg Kurz static void coroutine_fn v9fs_getlock(void *opaque) 307860ce86c7SWei Liu { 307960ce86c7SWei Liu size_t offset = 7; 308060ce86c7SWei Liu struct stat stbuf; 308160ce86c7SWei Liu V9fsFidState *fidp; 308260ce86c7SWei Liu V9fsGetlock glock; 308360ce86c7SWei Liu int32_t fid, err = 0; 308460ce86c7SWei Liu V9fsPDU *pdu = opaque; 308560ce86c7SWei Liu 308660ce86c7SWei Liu v9fs_string_init(&glock.client_id); 308760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 308860ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 308960ce86c7SWei Liu &glock.client_id); 309060ce86c7SWei Liu if (err < 0) { 309160ce86c7SWei Liu goto out_nofid; 309260ce86c7SWei Liu } 309360ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 309460ce86c7SWei Liu glock.type, glock.start, glock.length); 309560ce86c7SWei Liu 309660ce86c7SWei Liu fidp = get_fid(pdu, fid); 309760ce86c7SWei Liu if (fidp == NULL) { 309860ce86c7SWei Liu err = -ENOENT; 309960ce86c7SWei Liu goto out_nofid; 310060ce86c7SWei Liu } 310160ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 310260ce86c7SWei Liu if (err < 0) { 310360ce86c7SWei Liu goto out; 310460ce86c7SWei Liu } 310560ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 310660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 310760ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 310860ce86c7SWei Liu &glock.client_id); 310960ce86c7SWei Liu if (err < 0) { 311060ce86c7SWei Liu goto out; 311160ce86c7SWei Liu } 311260ce86c7SWei Liu err += offset; 311360ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 311460ce86c7SWei Liu glock.length, glock.proc_id); 311560ce86c7SWei Liu out: 311660ce86c7SWei Liu put_fid(pdu, fidp); 311760ce86c7SWei Liu out_nofid: 311860ce86c7SWei Liu pdu_complete(pdu, err); 311960ce86c7SWei Liu v9fs_string_free(&glock.client_id); 312060ce86c7SWei Liu } 312160ce86c7SWei Liu 31228440e22eSGreg Kurz static void coroutine_fn v9fs_mkdir(void *opaque) 312360ce86c7SWei Liu { 312460ce86c7SWei Liu V9fsPDU *pdu = opaque; 312560ce86c7SWei Liu size_t offset = 7; 312660ce86c7SWei Liu int32_t fid; 312760ce86c7SWei Liu struct stat stbuf; 312860ce86c7SWei Liu V9fsQID qid; 312960ce86c7SWei Liu V9fsString name; 313060ce86c7SWei Liu V9fsFidState *fidp; 313160ce86c7SWei Liu gid_t gid; 313260ce86c7SWei Liu int mode; 313360ce86c7SWei Liu int err = 0; 313460ce86c7SWei Liu 313560ce86c7SWei Liu v9fs_string_init(&name); 313660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 313760ce86c7SWei Liu if (err < 0) { 313860ce86c7SWei Liu goto out_nofid; 313960ce86c7SWei Liu } 314060ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 314160ce86c7SWei Liu 3142fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3143fff39a7aSGreg Kurz err = -ENOENT; 3144fff39a7aSGreg Kurz goto out_nofid; 3145fff39a7aSGreg Kurz } 3146fff39a7aSGreg Kurz 3147805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3148805b5d98SGreg Kurz err = -EEXIST; 3149805b5d98SGreg Kurz goto out_nofid; 3150805b5d98SGreg Kurz } 3151805b5d98SGreg Kurz 315260ce86c7SWei Liu fidp = get_fid(pdu, fid); 315360ce86c7SWei Liu if (fidp == NULL) { 315460ce86c7SWei Liu err = -ENOENT; 315560ce86c7SWei Liu goto out_nofid; 315660ce86c7SWei Liu } 315760ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 315860ce86c7SWei Liu if (err < 0) { 315960ce86c7SWei Liu goto out; 316060ce86c7SWei Liu } 316160ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 316260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 316360ce86c7SWei Liu if (err < 0) { 316460ce86c7SWei Liu goto out; 316560ce86c7SWei Liu } 316660ce86c7SWei Liu err += offset; 316760ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 316860ce86c7SWei Liu qid.type, qid.version, qid.path, err); 316960ce86c7SWei Liu out: 317060ce86c7SWei Liu put_fid(pdu, fidp); 317160ce86c7SWei Liu out_nofid: 317260ce86c7SWei Liu pdu_complete(pdu, err); 317360ce86c7SWei Liu v9fs_string_free(&name); 317460ce86c7SWei Liu } 317560ce86c7SWei Liu 31768440e22eSGreg Kurz static void coroutine_fn v9fs_xattrwalk(void *opaque) 317760ce86c7SWei Liu { 317860ce86c7SWei Liu int64_t size; 317960ce86c7SWei Liu V9fsString name; 318060ce86c7SWei Liu ssize_t err = 0; 318160ce86c7SWei Liu size_t offset = 7; 318260ce86c7SWei Liu int32_t fid, newfid; 318360ce86c7SWei Liu V9fsFidState *file_fidp; 318460ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 318560ce86c7SWei Liu V9fsPDU *pdu = opaque; 318660ce86c7SWei Liu V9fsState *s = pdu->s; 318760ce86c7SWei Liu 318860ce86c7SWei Liu v9fs_string_init(&name); 318960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 319060ce86c7SWei Liu if (err < 0) { 319160ce86c7SWei Liu goto out_nofid; 319260ce86c7SWei Liu } 319360ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 319460ce86c7SWei Liu 319560ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 319660ce86c7SWei Liu if (file_fidp == NULL) { 319760ce86c7SWei Liu err = -ENOENT; 319860ce86c7SWei Liu goto out_nofid; 319960ce86c7SWei Liu } 320060ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 320160ce86c7SWei Liu if (xattr_fidp == NULL) { 320260ce86c7SWei Liu err = -EINVAL; 320360ce86c7SWei Liu goto out; 320460ce86c7SWei Liu } 320560ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 3206ba42ebb8SLi Qiang if (!v9fs_string_size(&name)) { 320760ce86c7SWei Liu /* 320860ce86c7SWei Liu * listxattr request. Get the size first 320960ce86c7SWei Liu */ 321060ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 321160ce86c7SWei Liu if (size < 0) { 321260ce86c7SWei Liu err = size; 321360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 321460ce86c7SWei Liu goto out; 321560ce86c7SWei Liu } 321660ce86c7SWei Liu /* 321760ce86c7SWei Liu * Read the xattr value 321860ce86c7SWei Liu */ 321960ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 322060ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3221dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 322260ce86c7SWei Liu if (size) { 322360ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 322460ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 322560ce86c7SWei Liu xattr_fidp->fs.xattr.value, 322660ce86c7SWei Liu xattr_fidp->fs.xattr.len); 322760ce86c7SWei Liu if (err < 0) { 322860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 322960ce86c7SWei Liu goto out; 323060ce86c7SWei Liu } 323160ce86c7SWei Liu } 323260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 323360ce86c7SWei Liu if (err < 0) { 323460ce86c7SWei Liu goto out; 323560ce86c7SWei Liu } 323660ce86c7SWei Liu err += offset; 323760ce86c7SWei Liu } else { 323860ce86c7SWei Liu /* 323960ce86c7SWei Liu * specific xattr fid. We check for xattr 324060ce86c7SWei Liu * presence also collect the xattr size 324160ce86c7SWei Liu */ 324260ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 324360ce86c7SWei Liu &name, NULL, 0); 324460ce86c7SWei Liu if (size < 0) { 324560ce86c7SWei Liu err = size; 324660ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 324760ce86c7SWei Liu goto out; 324860ce86c7SWei Liu } 324960ce86c7SWei Liu /* 325060ce86c7SWei Liu * Read the xattr value 325160ce86c7SWei Liu */ 325260ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 325360ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3254dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 325560ce86c7SWei Liu if (size) { 325660ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 325760ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 325860ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 325960ce86c7SWei Liu xattr_fidp->fs.xattr.len); 326060ce86c7SWei Liu if (err < 0) { 326160ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 326260ce86c7SWei Liu goto out; 326360ce86c7SWei Liu } 326460ce86c7SWei Liu } 326560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 326660ce86c7SWei Liu if (err < 0) { 326760ce86c7SWei Liu goto out; 326860ce86c7SWei Liu } 326960ce86c7SWei Liu err += offset; 327060ce86c7SWei Liu } 327160ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 327260ce86c7SWei Liu out: 327360ce86c7SWei Liu put_fid(pdu, file_fidp); 327460ce86c7SWei Liu if (xattr_fidp) { 327560ce86c7SWei Liu put_fid(pdu, xattr_fidp); 327660ce86c7SWei Liu } 327760ce86c7SWei Liu out_nofid: 327860ce86c7SWei Liu pdu_complete(pdu, err); 327960ce86c7SWei Liu v9fs_string_free(&name); 328060ce86c7SWei Liu } 328160ce86c7SWei Liu 32828440e22eSGreg Kurz static void coroutine_fn v9fs_xattrcreate(void *opaque) 328360ce86c7SWei Liu { 328460ce86c7SWei Liu int flags; 328560ce86c7SWei Liu int32_t fid; 32863b79ef2cSGreg Kurz uint64_t size; 328760ce86c7SWei Liu ssize_t err = 0; 328860ce86c7SWei Liu V9fsString name; 328960ce86c7SWei Liu size_t offset = 7; 329060ce86c7SWei Liu V9fsFidState *file_fidp; 329160ce86c7SWei Liu V9fsFidState *xattr_fidp; 329260ce86c7SWei Liu V9fsPDU *pdu = opaque; 329360ce86c7SWei Liu 329460ce86c7SWei Liu v9fs_string_init(&name); 329560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 329660ce86c7SWei Liu if (err < 0) { 329760ce86c7SWei Liu goto out_nofid; 329860ce86c7SWei Liu } 329960ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 330060ce86c7SWei Liu 33013b79ef2cSGreg Kurz if (size > XATTR_SIZE_MAX) { 33023b79ef2cSGreg Kurz err = -E2BIG; 33033b79ef2cSGreg Kurz goto out_nofid; 33043b79ef2cSGreg Kurz } 33053b79ef2cSGreg Kurz 330660ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 330760ce86c7SWei Liu if (file_fidp == NULL) { 330860ce86c7SWei Liu err = -EINVAL; 330960ce86c7SWei Liu goto out_nofid; 331060ce86c7SWei Liu } 3311dd654e03SGreg Kurz if (file_fidp->fid_type != P9_FID_NONE) { 3312dd654e03SGreg Kurz err = -EINVAL; 3313dd654e03SGreg Kurz goto out_put_fid; 3314dd654e03SGreg Kurz } 3315dd654e03SGreg Kurz 331660ce86c7SWei Liu /* Make the file fid point to xattr */ 331760ce86c7SWei Liu xattr_fidp = file_fidp; 331860ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 331960ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 3320dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = false; 332160ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 332260ce86c7SWei Liu xattr_fidp->fs.xattr.flags = flags; 332360ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 332460ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 3325eb687602SLi Qiang xattr_fidp->fs.xattr.value = g_malloc0(size); 332660ce86c7SWei Liu err = offset; 3327dd654e03SGreg Kurz out_put_fid: 332860ce86c7SWei Liu put_fid(pdu, file_fidp); 332960ce86c7SWei Liu out_nofid: 333060ce86c7SWei Liu pdu_complete(pdu, err); 333160ce86c7SWei Liu v9fs_string_free(&name); 333260ce86c7SWei Liu } 333360ce86c7SWei Liu 33348440e22eSGreg Kurz static void coroutine_fn v9fs_readlink(void *opaque) 333560ce86c7SWei Liu { 333660ce86c7SWei Liu V9fsPDU *pdu = opaque; 333760ce86c7SWei Liu size_t offset = 7; 333860ce86c7SWei Liu V9fsString target; 333960ce86c7SWei Liu int32_t fid; 334060ce86c7SWei Liu int err = 0; 334160ce86c7SWei Liu V9fsFidState *fidp; 334260ce86c7SWei Liu 334360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 334460ce86c7SWei Liu if (err < 0) { 334560ce86c7SWei Liu goto out_nofid; 334660ce86c7SWei Liu } 334760ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 334860ce86c7SWei Liu fidp = get_fid(pdu, fid); 334960ce86c7SWei Liu if (fidp == NULL) { 335060ce86c7SWei Liu err = -ENOENT; 335160ce86c7SWei Liu goto out_nofid; 335260ce86c7SWei Liu } 335360ce86c7SWei Liu 335460ce86c7SWei Liu v9fs_string_init(&target); 335560ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 335660ce86c7SWei Liu if (err < 0) { 335760ce86c7SWei Liu goto out; 335860ce86c7SWei Liu } 335960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 336060ce86c7SWei Liu if (err < 0) { 336160ce86c7SWei Liu v9fs_string_free(&target); 336260ce86c7SWei Liu goto out; 336360ce86c7SWei Liu } 336460ce86c7SWei Liu err += offset; 336560ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 336660ce86c7SWei Liu v9fs_string_free(&target); 336760ce86c7SWei Liu out: 336860ce86c7SWei Liu put_fid(pdu, fidp); 336960ce86c7SWei Liu out_nofid: 337060ce86c7SWei Liu pdu_complete(pdu, err); 337160ce86c7SWei Liu } 337260ce86c7SWei Liu 337360ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 337460ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 337560ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 337660ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 337760ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 337860ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 337960ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 338060ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 338160ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 338260ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 338360ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 338460ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 338560ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 338660ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 338760ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 338860ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 338960ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 339060ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 339160ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 339260ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 339360ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 339460ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 339560ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 339660ce86c7SWei Liu [P9_TREAD] = v9fs_read, 339760ce86c7SWei Liu #if 0 339860ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 339960ce86c7SWei Liu #endif 340060ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 340160ce86c7SWei Liu [P9_TLINK] = v9fs_link, 340260ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 340360ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 340460ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 340560ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 340660ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 340760ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 340860ce86c7SWei Liu }; 340960ce86c7SWei Liu 34108440e22eSGreg Kurz static void coroutine_fn v9fs_op_not_supp(void *opaque) 341160ce86c7SWei Liu { 341260ce86c7SWei Liu V9fsPDU *pdu = opaque; 341360ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 341460ce86c7SWei Liu } 341560ce86c7SWei Liu 34168440e22eSGreg Kurz static void coroutine_fn v9fs_fs_ro(void *opaque) 341760ce86c7SWei Liu { 341860ce86c7SWei Liu V9fsPDU *pdu = opaque; 341960ce86c7SWei Liu pdu_complete(pdu, -EROFS); 342060ce86c7SWei Liu } 342160ce86c7SWei Liu 342260ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 342360ce86c7SWei Liu { 342460ce86c7SWei Liu switch (pdu->id) { 342560ce86c7SWei Liu case P9_TREADDIR: 342660ce86c7SWei Liu case P9_TSTATFS: 342760ce86c7SWei Liu case P9_TGETATTR: 342860ce86c7SWei Liu case P9_TXATTRWALK: 342960ce86c7SWei Liu case P9_TLOCK: 343060ce86c7SWei Liu case P9_TGETLOCK: 343160ce86c7SWei Liu case P9_TREADLINK: 343260ce86c7SWei Liu case P9_TVERSION: 343360ce86c7SWei Liu case P9_TLOPEN: 343460ce86c7SWei Liu case P9_TATTACH: 343560ce86c7SWei Liu case P9_TSTAT: 343660ce86c7SWei Liu case P9_TWALK: 343760ce86c7SWei Liu case P9_TCLUNK: 343860ce86c7SWei Liu case P9_TFSYNC: 343960ce86c7SWei Liu case P9_TOPEN: 344060ce86c7SWei Liu case P9_TREAD: 344160ce86c7SWei Liu case P9_TAUTH: 344260ce86c7SWei Liu case P9_TFLUSH: 344360ce86c7SWei Liu return 1; 344460ce86c7SWei Liu default: 344560ce86c7SWei Liu return 0; 344660ce86c7SWei Liu } 344760ce86c7SWei Liu } 344860ce86c7SWei Liu 344960ce86c7SWei Liu void pdu_submit(V9fsPDU *pdu) 345060ce86c7SWei Liu { 345160ce86c7SWei Liu Coroutine *co; 345260ce86c7SWei Liu CoroutineEntry *handler; 345360ce86c7SWei Liu V9fsState *s = pdu->s; 345460ce86c7SWei Liu 345560ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 345660ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 345760ce86c7SWei Liu handler = v9fs_op_not_supp; 345860ce86c7SWei Liu } else { 345960ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 346060ce86c7SWei Liu } 346160ce86c7SWei Liu 346260ce86c7SWei Liu if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 346360ce86c7SWei Liu handler = v9fs_fs_ro; 346460ce86c7SWei Liu } 34650b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 34660b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 346760ce86c7SWei Liu } 346860ce86c7SWei Liu 34692a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 34702a0c56aaSWei Liu int v9fs_device_realize_common(V9fsState *s, Error **errp) 34712a0c56aaSWei Liu { 34722a0c56aaSWei Liu int i, len; 34732a0c56aaSWei Liu struct stat stat; 34742a0c56aaSWei Liu FsDriverEntry *fse; 34752a0c56aaSWei Liu V9fsPath path; 34762a0c56aaSWei Liu int rc = 1; 34772a0c56aaSWei Liu 34782a0c56aaSWei Liu /* initialize pdu allocator */ 34792a0c56aaSWei Liu QLIST_INIT(&s->free_list); 34802a0c56aaSWei Liu QLIST_INIT(&s->active_list); 34810d78289cSGreg Kurz for (i = 0; i < MAX_REQ; i++) { 3482583f21f8SStefano Stabellini QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 3483583f21f8SStefano Stabellini s->pdus[i].s = s; 3484583f21f8SStefano Stabellini s->pdus[i].idx = i; 34852a0c56aaSWei Liu } 34862a0c56aaSWei Liu 34872a0c56aaSWei Liu v9fs_path_init(&path); 34882a0c56aaSWei Liu 34892a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 34902a0c56aaSWei Liu 34912a0c56aaSWei Liu if (!fse) { 34922a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 34932a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 34942a0c56aaSWei Liu "id = %s", 34952a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 34962a0c56aaSWei Liu goto out; 34972a0c56aaSWei Liu } 34982a0c56aaSWei Liu 34992a0c56aaSWei Liu if (!s->fsconf.tag) { 35002a0c56aaSWei Liu /* we haven't specified a mount_tag */ 35012a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 35022a0c56aaSWei Liu s->fsconf.fsdev_id); 35032a0c56aaSWei Liu goto out; 35042a0c56aaSWei Liu } 35052a0c56aaSWei Liu 35062a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 35072a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 35082a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 35092a0c56aaSWei Liu len = strlen(s->fsconf.tag); 35102a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 35112a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 35122a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 35132a0c56aaSWei Liu goto out; 35142a0c56aaSWei Liu } 35152a0c56aaSWei Liu 35162a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 35172a0c56aaSWei Liu s->ctx.uid = -1; 35182a0c56aaSWei Liu 35192a0c56aaSWei Liu s->ops = fse->ops; 35202a0c56aaSWei Liu 35212a0c56aaSWei Liu s->fid_list = NULL; 35222a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 35232a0c56aaSWei Liu 35242a0c56aaSWei Liu if (s->ops->init(&s->ctx) < 0) { 35252a0c56aaSWei Liu error_setg(errp, "9pfs Failed to initialize fs-driver with id:%s" 35262a0c56aaSWei Liu " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); 35272a0c56aaSWei Liu goto out; 35282a0c56aaSWei Liu } 35292a0c56aaSWei Liu 35302a0c56aaSWei Liu /* 35312a0c56aaSWei Liu * Check details of export path, We need to use fs driver 35322a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 35332a0c56aaSWei Liu * use co-routines here. 35342a0c56aaSWei Liu */ 35352a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 35362a0c56aaSWei Liu error_setg(errp, 35372a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 35382a0c56aaSWei Liu goto out; 35392a0c56aaSWei Liu } 35402a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 35412a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 35422a0c56aaSWei Liu goto out; 35432a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 35442a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 35452a0c56aaSWei Liu goto out; 35462a0c56aaSWei Liu } 3547b8bbdb88SPradeep Jagadeesh 3548b8bbdb88SPradeep Jagadeesh s->ctx.fst = &fse->fst; 3549b8bbdb88SPradeep Jagadeesh fsdev_throttle_init(s->ctx.fst); 3550b8bbdb88SPradeep Jagadeesh 35512a0c56aaSWei Liu v9fs_path_free(&path); 35522a0c56aaSWei Liu 35532a0c56aaSWei Liu rc = 0; 35542a0c56aaSWei Liu out: 35552a0c56aaSWei Liu if (rc) { 3556f2b58c43SGreg Kurz if (s->ops && s->ops->cleanup && s->ctx.private) { 3557702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3558702dbcc2SLi Qiang } 35592a0c56aaSWei Liu g_free(s->tag); 35604774718eSLi Qiang g_free(s->ctx.fs_root); 35612a0c56aaSWei Liu v9fs_path_free(&path); 35622a0c56aaSWei Liu } 35632a0c56aaSWei Liu return rc; 35642a0c56aaSWei Liu } 35652a0c56aaSWei Liu 35662a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 35672a0c56aaSWei Liu { 3568702dbcc2SLi Qiang if (s->ops->cleanup) { 3569702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3570702dbcc2SLi Qiang } 3571b8bbdb88SPradeep Jagadeesh fsdev_throttle_cleanup(s->ctx.fst); 35722a0c56aaSWei Liu g_free(s->tag); 35734774718eSLi Qiang g_free(s->ctx.fs_root); 35742a0c56aaSWei Liu } 35752a0c56aaSWei Liu 35760e44a0fdSGreg Kurz typedef struct VirtfsCoResetData { 35770e44a0fdSGreg Kurz V9fsPDU pdu; 35780e44a0fdSGreg Kurz bool done; 35790e44a0fdSGreg Kurz } VirtfsCoResetData; 35800e44a0fdSGreg Kurz 35810e44a0fdSGreg Kurz static void coroutine_fn virtfs_co_reset(void *opaque) 35820e44a0fdSGreg Kurz { 35830e44a0fdSGreg Kurz VirtfsCoResetData *data = opaque; 35840e44a0fdSGreg Kurz 35850e44a0fdSGreg Kurz virtfs_reset(&data->pdu); 35860e44a0fdSGreg Kurz data->done = true; 35870e44a0fdSGreg Kurz } 35880e44a0fdSGreg Kurz 35890e44a0fdSGreg Kurz void v9fs_reset(V9fsState *s) 35900e44a0fdSGreg Kurz { 35910e44a0fdSGreg Kurz VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; 35920e44a0fdSGreg Kurz Coroutine *co; 35930e44a0fdSGreg Kurz 35940e44a0fdSGreg Kurz while (!QLIST_EMPTY(&s->active_list)) { 35950e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 35960e44a0fdSGreg Kurz } 35970e44a0fdSGreg Kurz 35980e44a0fdSGreg Kurz co = qemu_coroutine_create(virtfs_co_reset, &data); 35990e44a0fdSGreg Kurz qemu_coroutine_enter(co); 36000e44a0fdSGreg Kurz 36010e44a0fdSGreg Kurz while (!data.done) { 36020e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 36030e44a0fdSGreg Kurz } 36040e44a0fdSGreg Kurz } 36050e44a0fdSGreg Kurz 360660ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 360760ce86c7SWei Liu { 360860ce86c7SWei Liu struct rlimit rlim; 360960ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 361063325b18SGreg Kurz error_report("Failed to get the resource limit"); 361160ce86c7SWei Liu exit(1); 361260ce86c7SWei Liu } 361360ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 361460ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 361560ce86c7SWei Liu } 3616