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" 26795c40b8SJuan Quintela #include "migration/blocker.h" 27357e2f7fSGreg Kurz #include "sysemu/qtest.h" 2860ce86c7SWei Liu 2960ce86c7SWei Liu int open_fd_hw; 3060ce86c7SWei Liu int total_open_fd; 3160ce86c7SWei Liu static int open_fd_rc; 3260ce86c7SWei Liu 3360ce86c7SWei Liu enum { 3460ce86c7SWei Liu Oread = 0x00, 3560ce86c7SWei Liu Owrite = 0x01, 3660ce86c7SWei Liu Ordwr = 0x02, 3760ce86c7SWei Liu Oexec = 0x03, 3860ce86c7SWei Liu Oexcl = 0x04, 3960ce86c7SWei Liu Otrunc = 0x10, 4060ce86c7SWei Liu Orexec = 0x20, 4160ce86c7SWei Liu Orclose = 0x40, 4260ce86c7SWei Liu Oappend = 0x80, 4360ce86c7SWei Liu }; 4460ce86c7SWei Liu 4575673590SGreg Kurz static ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 4660ce86c7SWei Liu { 4760ce86c7SWei Liu ssize_t ret; 4860ce86c7SWei Liu va_list ap; 4960ce86c7SWei Liu 5060ce86c7SWei Liu va_start(ap, fmt); 51ea83441cSStefano Stabellini ret = pdu->s->transport->pdu_vmarshal(pdu, offset, fmt, ap); 5260ce86c7SWei Liu va_end(ap); 5360ce86c7SWei Liu 5460ce86c7SWei Liu return ret; 5560ce86c7SWei Liu } 5660ce86c7SWei Liu 5775673590SGreg Kurz static ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 5860ce86c7SWei Liu { 5960ce86c7SWei Liu ssize_t ret; 6060ce86c7SWei Liu va_list ap; 6160ce86c7SWei Liu 6260ce86c7SWei Liu va_start(ap, fmt); 63ea83441cSStefano Stabellini ret = pdu->s->transport->pdu_vunmarshal(pdu, offset, fmt, ap); 6460ce86c7SWei Liu va_end(ap); 6560ce86c7SWei Liu 6660ce86c7SWei Liu return ret; 6760ce86c7SWei Liu } 6860ce86c7SWei Liu 6960ce86c7SWei Liu static int omode_to_uflags(int8_t mode) 7060ce86c7SWei Liu { 7160ce86c7SWei Liu int ret = 0; 7260ce86c7SWei Liu 7360ce86c7SWei Liu switch (mode & 3) { 7460ce86c7SWei Liu case Oread: 7560ce86c7SWei Liu ret = O_RDONLY; 7660ce86c7SWei Liu break; 7760ce86c7SWei Liu case Ordwr: 7860ce86c7SWei Liu ret = O_RDWR; 7960ce86c7SWei Liu break; 8060ce86c7SWei Liu case Owrite: 8160ce86c7SWei Liu ret = O_WRONLY; 8260ce86c7SWei Liu break; 8360ce86c7SWei Liu case Oexec: 8460ce86c7SWei Liu ret = O_RDONLY; 8560ce86c7SWei Liu break; 8660ce86c7SWei Liu } 8760ce86c7SWei Liu 8860ce86c7SWei Liu if (mode & Otrunc) { 8960ce86c7SWei Liu ret |= O_TRUNC; 9060ce86c7SWei Liu } 9160ce86c7SWei Liu 9260ce86c7SWei Liu if (mode & Oappend) { 9360ce86c7SWei Liu ret |= O_APPEND; 9460ce86c7SWei Liu } 9560ce86c7SWei Liu 9660ce86c7SWei Liu if (mode & Oexcl) { 9760ce86c7SWei Liu ret |= O_EXCL; 9860ce86c7SWei Liu } 9960ce86c7SWei Liu 10060ce86c7SWei Liu return ret; 10160ce86c7SWei Liu } 10260ce86c7SWei Liu 1038e71b96cSGreg Kurz typedef struct DotlOpenflagMap { 10460ce86c7SWei Liu int dotl_flag; 10560ce86c7SWei Liu int open_flag; 1068e71b96cSGreg Kurz } DotlOpenflagMap; 10760ce86c7SWei Liu 10860ce86c7SWei Liu static int dotl_to_open_flags(int flags) 10960ce86c7SWei Liu { 11060ce86c7SWei Liu int i; 11160ce86c7SWei Liu /* 11260ce86c7SWei Liu * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY 11360ce86c7SWei Liu * and P9_DOTL_NOACCESS 11460ce86c7SWei Liu */ 11560ce86c7SWei Liu int oflags = flags & O_ACCMODE; 11660ce86c7SWei Liu 1178e71b96cSGreg Kurz DotlOpenflagMap dotl_oflag_map[] = { 11860ce86c7SWei Liu { P9_DOTL_CREATE, O_CREAT }, 11960ce86c7SWei Liu { P9_DOTL_EXCL, O_EXCL }, 12060ce86c7SWei Liu { P9_DOTL_NOCTTY , O_NOCTTY }, 12160ce86c7SWei Liu { P9_DOTL_TRUNC, O_TRUNC }, 12260ce86c7SWei Liu { P9_DOTL_APPEND, O_APPEND }, 12360ce86c7SWei Liu { P9_DOTL_NONBLOCK, O_NONBLOCK } , 12460ce86c7SWei Liu { P9_DOTL_DSYNC, O_DSYNC }, 12560ce86c7SWei Liu { P9_DOTL_FASYNC, FASYNC }, 12660ce86c7SWei Liu { P9_DOTL_DIRECT, O_DIRECT }, 12760ce86c7SWei Liu { P9_DOTL_LARGEFILE, O_LARGEFILE }, 12860ce86c7SWei Liu { P9_DOTL_DIRECTORY, O_DIRECTORY }, 12960ce86c7SWei Liu { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, 13060ce86c7SWei Liu { P9_DOTL_NOATIME, O_NOATIME }, 13160ce86c7SWei Liu { P9_DOTL_SYNC, O_SYNC }, 13260ce86c7SWei Liu }; 13360ce86c7SWei Liu 13460ce86c7SWei Liu for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { 13560ce86c7SWei Liu if (flags & dotl_oflag_map[i].dotl_flag) { 13660ce86c7SWei Liu oflags |= dotl_oflag_map[i].open_flag; 13760ce86c7SWei Liu } 13860ce86c7SWei Liu } 13960ce86c7SWei Liu 14060ce86c7SWei Liu return oflags; 14160ce86c7SWei Liu } 14260ce86c7SWei Liu 14360ce86c7SWei Liu void cred_init(FsCred *credp) 14460ce86c7SWei Liu { 14560ce86c7SWei Liu credp->fc_uid = -1; 14660ce86c7SWei Liu credp->fc_gid = -1; 14760ce86c7SWei Liu credp->fc_mode = -1; 14860ce86c7SWei Liu credp->fc_rdev = -1; 14960ce86c7SWei Liu } 15060ce86c7SWei Liu 15160ce86c7SWei Liu static int get_dotl_openflags(V9fsState *s, int oflags) 15260ce86c7SWei Liu { 15360ce86c7SWei Liu int flags; 15460ce86c7SWei Liu /* 15560ce86c7SWei Liu * Filter the client open flags 15660ce86c7SWei Liu */ 15760ce86c7SWei Liu flags = dotl_to_open_flags(oflags); 15860ce86c7SWei Liu flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); 15960ce86c7SWei Liu /* 16060ce86c7SWei Liu * Ignore direct disk access hint until the server supports it. 16160ce86c7SWei Liu */ 16260ce86c7SWei Liu flags &= ~O_DIRECT; 16360ce86c7SWei Liu return flags; 16460ce86c7SWei Liu } 16560ce86c7SWei Liu 16660ce86c7SWei Liu void v9fs_path_init(V9fsPath *path) 16760ce86c7SWei Liu { 16860ce86c7SWei Liu path->data = NULL; 16960ce86c7SWei Liu path->size = 0; 17060ce86c7SWei Liu } 17160ce86c7SWei Liu 17260ce86c7SWei Liu void v9fs_path_free(V9fsPath *path) 17360ce86c7SWei Liu { 17460ce86c7SWei Liu g_free(path->data); 17560ce86c7SWei Liu path->data = NULL; 17660ce86c7SWei Liu path->size = 0; 17760ce86c7SWei Liu } 17860ce86c7SWei Liu 179e3e83f2eSGreg Kurz 180e3e83f2eSGreg Kurz void GCC_FMT_ATTR(2, 3) 181e3e83f2eSGreg Kurz v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) 182e3e83f2eSGreg Kurz { 183e3e83f2eSGreg Kurz va_list ap; 184e3e83f2eSGreg Kurz 185e3e83f2eSGreg Kurz v9fs_path_free(path); 186e3e83f2eSGreg Kurz 187e3e83f2eSGreg Kurz va_start(ap, fmt); 188e3e83f2eSGreg Kurz /* Bump the size for including terminating NULL */ 189e3e83f2eSGreg Kurz path->size = g_vasprintf(&path->data, fmt, ap) + 1; 190e3e83f2eSGreg Kurz va_end(ap); 191e3e83f2eSGreg Kurz } 192e3e83f2eSGreg Kurz 193e446a1ebSMarc-André Lureau void v9fs_path_copy(V9fsPath *dst, const V9fsPath *src) 19460ce86c7SWei Liu { 195e446a1ebSMarc-André Lureau v9fs_path_free(dst); 196e446a1ebSMarc-André Lureau dst->size = src->size; 197e446a1ebSMarc-André Lureau dst->data = g_memdup(src->data, src->size); 19860ce86c7SWei Liu } 19960ce86c7SWei Liu 20060ce86c7SWei Liu int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 20160ce86c7SWei Liu const char *name, V9fsPath *path) 20260ce86c7SWei Liu { 20360ce86c7SWei Liu int err; 20460ce86c7SWei Liu err = s->ops->name_to_path(&s->ctx, dirpath, name, path); 20560ce86c7SWei Liu if (err < 0) { 20660ce86c7SWei Liu err = -errno; 20760ce86c7SWei Liu } 20860ce86c7SWei Liu return err; 20960ce86c7SWei Liu } 21060ce86c7SWei Liu 21160ce86c7SWei Liu /* 21260ce86c7SWei Liu * Return TRUE if s1 is an ancestor of s2. 21360ce86c7SWei Liu * 21460ce86c7SWei Liu * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". 21560ce86c7SWei Liu * As a special case, We treat s1 as ancestor of s2 if they are same! 21660ce86c7SWei Liu */ 21760ce86c7SWei Liu static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) 21860ce86c7SWei Liu { 21960ce86c7SWei Liu if (!strncmp(s1->data, s2->data, s1->size - 1)) { 22060ce86c7SWei Liu if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { 22160ce86c7SWei Liu return 1; 22260ce86c7SWei Liu } 22360ce86c7SWei Liu } 22460ce86c7SWei Liu return 0; 22560ce86c7SWei Liu } 22660ce86c7SWei Liu 22760ce86c7SWei Liu static size_t v9fs_string_size(V9fsString *str) 22860ce86c7SWei Liu { 22960ce86c7SWei Liu return str->size; 23060ce86c7SWei Liu } 23160ce86c7SWei Liu 23260ce86c7SWei Liu /* 23360ce86c7SWei Liu * returns 0 if fid got re-opened, 1 if not, < 0 on error */ 2348440e22eSGreg Kurz static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) 23560ce86c7SWei Liu { 23660ce86c7SWei Liu int err = 1; 23760ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 23860ce86c7SWei Liu if (f->fs.fd == -1) { 23960ce86c7SWei Liu do { 24060ce86c7SWei Liu err = v9fs_co_open(pdu, f, f->open_flags); 24160ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 24260ce86c7SWei Liu } 24360ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 244f314ea4eSGreg Kurz if (f->fs.dir.stream == NULL) { 24560ce86c7SWei Liu do { 24660ce86c7SWei Liu err = v9fs_co_opendir(pdu, f); 24760ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 24860ce86c7SWei Liu } 24960ce86c7SWei Liu } 25060ce86c7SWei Liu return err; 25160ce86c7SWei Liu } 25260ce86c7SWei Liu 2538440e22eSGreg Kurz static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) 25460ce86c7SWei Liu { 25560ce86c7SWei Liu int err; 25660ce86c7SWei Liu V9fsFidState *f; 25760ce86c7SWei Liu V9fsState *s = pdu->s; 25860ce86c7SWei Liu 25960ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 26060ce86c7SWei Liu BUG_ON(f->clunked); 26160ce86c7SWei Liu if (f->fid == fid) { 26260ce86c7SWei Liu /* 26360ce86c7SWei Liu * Update the fid ref upfront so that 26460ce86c7SWei Liu * we don't get reclaimed when we yield 26560ce86c7SWei Liu * in open later. 26660ce86c7SWei Liu */ 26760ce86c7SWei Liu f->ref++; 26860ce86c7SWei Liu /* 26960ce86c7SWei Liu * check whether we need to reopen the 27060ce86c7SWei Liu * file. We might have closed the fd 27160ce86c7SWei Liu * while trying to free up some file 27260ce86c7SWei Liu * descriptors. 27360ce86c7SWei Liu */ 27460ce86c7SWei Liu err = v9fs_reopen_fid(pdu, f); 27560ce86c7SWei Liu if (err < 0) { 27660ce86c7SWei Liu f->ref--; 27760ce86c7SWei Liu return NULL; 27860ce86c7SWei Liu } 27960ce86c7SWei Liu /* 28060ce86c7SWei Liu * Mark the fid as referenced so that the LRU 28160ce86c7SWei Liu * reclaim won't close the file descriptor 28260ce86c7SWei Liu */ 28360ce86c7SWei Liu f->flags |= FID_REFERENCED; 28460ce86c7SWei Liu return f; 28560ce86c7SWei Liu } 28660ce86c7SWei Liu } 28760ce86c7SWei Liu return NULL; 28860ce86c7SWei Liu } 28960ce86c7SWei Liu 29060ce86c7SWei Liu static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) 29160ce86c7SWei Liu { 29260ce86c7SWei Liu V9fsFidState *f; 29360ce86c7SWei Liu 29460ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 29560ce86c7SWei Liu /* If fid is already there return NULL */ 29660ce86c7SWei Liu BUG_ON(f->clunked); 29760ce86c7SWei Liu if (f->fid == fid) { 29860ce86c7SWei Liu return NULL; 29960ce86c7SWei Liu } 30060ce86c7SWei Liu } 30160ce86c7SWei Liu f = g_malloc0(sizeof(V9fsFidState)); 30260ce86c7SWei Liu f->fid = fid; 30360ce86c7SWei Liu f->fid_type = P9_FID_NONE; 30460ce86c7SWei Liu f->ref = 1; 30560ce86c7SWei Liu /* 30660ce86c7SWei Liu * Mark the fid as referenced so that the LRU 30760ce86c7SWei Liu * reclaim won't close the file descriptor 30860ce86c7SWei Liu */ 30960ce86c7SWei Liu f->flags |= FID_REFERENCED; 31060ce86c7SWei Liu f->next = s->fid_list; 31160ce86c7SWei Liu s->fid_list = f; 31260ce86c7SWei Liu 3137cde47d4SGreg Kurz v9fs_readdir_init(&f->fs.dir); 3147cde47d4SGreg Kurz v9fs_readdir_init(&f->fs_reclaim.dir); 3157cde47d4SGreg Kurz 31660ce86c7SWei Liu return f; 31760ce86c7SWei Liu } 31860ce86c7SWei Liu 3198440e22eSGreg Kurz static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) 32060ce86c7SWei Liu { 32160ce86c7SWei Liu int retval = 0; 32260ce86c7SWei Liu 323dd28fbbcSLi Qiang if (fidp->fs.xattr.xattrwalk_fid) { 32460ce86c7SWei Liu /* getxattr/listxattr fid */ 32560ce86c7SWei Liu goto free_value; 32660ce86c7SWei Liu } 32760ce86c7SWei Liu /* 32860ce86c7SWei Liu * if this is fid for setxattr. clunk should 32960ce86c7SWei Liu * result in setxattr localcall 33060ce86c7SWei Liu */ 33160ce86c7SWei Liu if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { 33260ce86c7SWei Liu /* clunk after partial write */ 33360ce86c7SWei Liu retval = -EINVAL; 33460ce86c7SWei Liu goto free_out; 33560ce86c7SWei Liu } 33660ce86c7SWei Liu if (fidp->fs.xattr.len) { 33760ce86c7SWei Liu retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, 33860ce86c7SWei Liu fidp->fs.xattr.value, 33960ce86c7SWei Liu fidp->fs.xattr.len, 34060ce86c7SWei Liu fidp->fs.xattr.flags); 34160ce86c7SWei Liu } else { 34260ce86c7SWei Liu retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); 34360ce86c7SWei Liu } 34460ce86c7SWei Liu free_out: 34560ce86c7SWei Liu v9fs_string_free(&fidp->fs.xattr.name); 34660ce86c7SWei Liu free_value: 34760ce86c7SWei Liu g_free(fidp->fs.xattr.value); 34860ce86c7SWei Liu return retval; 34960ce86c7SWei Liu } 35060ce86c7SWei Liu 3518440e22eSGreg Kurz static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) 35260ce86c7SWei Liu { 35360ce86c7SWei Liu int retval = 0; 35460ce86c7SWei Liu 35560ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 35660ce86c7SWei Liu /* If we reclaimed the fd no need to close */ 35760ce86c7SWei Liu if (fidp->fs.fd != -1) { 35860ce86c7SWei Liu retval = v9fs_co_close(pdu, &fidp->fs); 35960ce86c7SWei Liu } 36060ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_DIR) { 361f314ea4eSGreg Kurz if (fidp->fs.dir.stream != NULL) { 36260ce86c7SWei Liu retval = v9fs_co_closedir(pdu, &fidp->fs); 36360ce86c7SWei Liu } 36460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 36560ce86c7SWei Liu retval = v9fs_xattr_fid_clunk(pdu, fidp); 36660ce86c7SWei Liu } 36760ce86c7SWei Liu v9fs_path_free(&fidp->path); 36860ce86c7SWei Liu g_free(fidp); 36960ce86c7SWei Liu return retval; 37060ce86c7SWei Liu } 37160ce86c7SWei Liu 3728440e22eSGreg Kurz static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) 37360ce86c7SWei Liu { 37460ce86c7SWei Liu BUG_ON(!fidp->ref); 37560ce86c7SWei Liu fidp->ref--; 37660ce86c7SWei Liu /* 37760ce86c7SWei Liu * Don't free the fid if it is in reclaim list 37860ce86c7SWei Liu */ 37960ce86c7SWei Liu if (!fidp->ref && fidp->clunked) { 38060ce86c7SWei Liu if (fidp->fid == pdu->s->root_fid) { 38160ce86c7SWei Liu /* 38260ce86c7SWei Liu * if the clunked fid is root fid then we 38360ce86c7SWei Liu * have unmounted the fs on the client side. 38460ce86c7SWei Liu * delete the migration blocker. Ideally, this 38560ce86c7SWei Liu * should be hooked to transport close notification 38660ce86c7SWei Liu */ 38760ce86c7SWei Liu if (pdu->s->migration_blocker) { 38860ce86c7SWei Liu migrate_del_blocker(pdu->s->migration_blocker); 38960ce86c7SWei Liu error_free(pdu->s->migration_blocker); 39060ce86c7SWei Liu pdu->s->migration_blocker = NULL; 39160ce86c7SWei Liu } 39260ce86c7SWei Liu } 39360ce86c7SWei Liu return free_fid(pdu, fidp); 39460ce86c7SWei Liu } 39560ce86c7SWei Liu return 0; 39660ce86c7SWei Liu } 39760ce86c7SWei Liu 39860ce86c7SWei Liu static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) 39960ce86c7SWei Liu { 40060ce86c7SWei Liu V9fsFidState **fidpp, *fidp; 40160ce86c7SWei Liu 40260ce86c7SWei Liu for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { 40360ce86c7SWei Liu if ((*fidpp)->fid == fid) { 40460ce86c7SWei Liu break; 40560ce86c7SWei Liu } 40660ce86c7SWei Liu } 40760ce86c7SWei Liu if (*fidpp == NULL) { 40860ce86c7SWei Liu return NULL; 40960ce86c7SWei Liu } 41060ce86c7SWei Liu fidp = *fidpp; 41160ce86c7SWei Liu *fidpp = fidp->next; 41260ce86c7SWei Liu fidp->clunked = 1; 41360ce86c7SWei Liu return fidp; 41460ce86c7SWei Liu } 41560ce86c7SWei Liu 4168440e22eSGreg Kurz void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) 41760ce86c7SWei Liu { 41860ce86c7SWei Liu int reclaim_count = 0; 41960ce86c7SWei Liu V9fsState *s = pdu->s; 42060ce86c7SWei Liu V9fsFidState *f, *reclaim_list = NULL; 42160ce86c7SWei Liu 42260ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 42360ce86c7SWei Liu /* 42460ce86c7SWei Liu * Unlink fids cannot be reclaimed. Check 42560ce86c7SWei Liu * for them and skip them. Also skip fids 42660ce86c7SWei Liu * currently being operated on. 42760ce86c7SWei Liu */ 42860ce86c7SWei Liu if (f->ref || f->flags & FID_NON_RECLAIMABLE) { 42960ce86c7SWei Liu continue; 43060ce86c7SWei Liu } 43160ce86c7SWei Liu /* 43260ce86c7SWei Liu * if it is a recently referenced fid 43360ce86c7SWei Liu * we leave the fid untouched and clear the 43460ce86c7SWei Liu * reference bit. We come back to it later 43560ce86c7SWei Liu * in the next iteration. (a simple LRU without 43660ce86c7SWei Liu * moving list elements around) 43760ce86c7SWei Liu */ 43860ce86c7SWei Liu if (f->flags & FID_REFERENCED) { 43960ce86c7SWei Liu f->flags &= ~FID_REFERENCED; 44060ce86c7SWei Liu continue; 44160ce86c7SWei Liu } 44260ce86c7SWei Liu /* 44360ce86c7SWei Liu * Add fids to reclaim list. 44460ce86c7SWei Liu */ 44560ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 44660ce86c7SWei Liu if (f->fs.fd != -1) { 44760ce86c7SWei Liu /* 44860ce86c7SWei Liu * Up the reference count so that 44960ce86c7SWei Liu * a clunk request won't free this fid 45060ce86c7SWei Liu */ 45160ce86c7SWei Liu f->ref++; 45260ce86c7SWei Liu f->rclm_lst = reclaim_list; 45360ce86c7SWei Liu reclaim_list = f; 45460ce86c7SWei Liu f->fs_reclaim.fd = f->fs.fd; 45560ce86c7SWei Liu f->fs.fd = -1; 45660ce86c7SWei Liu reclaim_count++; 45760ce86c7SWei Liu } 45860ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 459f314ea4eSGreg Kurz if (f->fs.dir.stream != NULL) { 46060ce86c7SWei Liu /* 46160ce86c7SWei Liu * Up the reference count so that 46260ce86c7SWei Liu * a clunk request won't free this fid 46360ce86c7SWei Liu */ 46460ce86c7SWei Liu f->ref++; 46560ce86c7SWei Liu f->rclm_lst = reclaim_list; 46660ce86c7SWei Liu reclaim_list = f; 467f314ea4eSGreg Kurz f->fs_reclaim.dir.stream = f->fs.dir.stream; 468f314ea4eSGreg Kurz f->fs.dir.stream = NULL; 46960ce86c7SWei Liu reclaim_count++; 47060ce86c7SWei Liu } 47160ce86c7SWei Liu } 47260ce86c7SWei Liu if (reclaim_count >= open_fd_rc) { 47360ce86c7SWei Liu break; 47460ce86c7SWei Liu } 47560ce86c7SWei Liu } 47660ce86c7SWei Liu /* 47760ce86c7SWei Liu * Now close the fid in reclaim list. Free them if they 47860ce86c7SWei Liu * are already clunked. 47960ce86c7SWei Liu */ 48060ce86c7SWei Liu while (reclaim_list) { 48160ce86c7SWei Liu f = reclaim_list; 48260ce86c7SWei Liu reclaim_list = f->rclm_lst; 48360ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 48460ce86c7SWei Liu v9fs_co_close(pdu, &f->fs_reclaim); 48560ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 48660ce86c7SWei Liu v9fs_co_closedir(pdu, &f->fs_reclaim); 48760ce86c7SWei Liu } 48860ce86c7SWei Liu f->rclm_lst = NULL; 48960ce86c7SWei Liu /* 49060ce86c7SWei Liu * Now drop the fid reference, free it 49160ce86c7SWei Liu * if clunked. 49260ce86c7SWei Liu */ 49360ce86c7SWei Liu put_fid(pdu, f); 49460ce86c7SWei Liu } 49560ce86c7SWei Liu } 49660ce86c7SWei Liu 4978440e22eSGreg Kurz static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) 49860ce86c7SWei Liu { 49960ce86c7SWei Liu int err; 50060ce86c7SWei Liu V9fsState *s = pdu->s; 50160ce86c7SWei Liu V9fsFidState *fidp, head_fid; 50260ce86c7SWei Liu 50360ce86c7SWei Liu head_fid.next = s->fid_list; 50460ce86c7SWei Liu for (fidp = s->fid_list; fidp; fidp = fidp->next) { 50560ce86c7SWei Liu if (fidp->path.size != path->size) { 50660ce86c7SWei Liu continue; 50760ce86c7SWei Liu } 50860ce86c7SWei Liu if (!memcmp(fidp->path.data, path->data, path->size)) { 50960ce86c7SWei Liu /* Mark the fid non reclaimable. */ 51060ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 51160ce86c7SWei Liu 51260ce86c7SWei Liu /* reopen the file/dir if already closed */ 51360ce86c7SWei Liu err = v9fs_reopen_fid(pdu, fidp); 51460ce86c7SWei Liu if (err < 0) { 515267fcadfSGreg Kurz return err; 51660ce86c7SWei Liu } 51760ce86c7SWei Liu /* 51860ce86c7SWei Liu * Go back to head of fid list because 51960ce86c7SWei Liu * the list could have got updated when 52060ce86c7SWei Liu * switched to the worker thread 52160ce86c7SWei Liu */ 52260ce86c7SWei Liu if (err == 0) { 52360ce86c7SWei Liu fidp = &head_fid; 52460ce86c7SWei Liu } 52560ce86c7SWei Liu } 52660ce86c7SWei Liu } 52760ce86c7SWei Liu return 0; 52860ce86c7SWei Liu } 52960ce86c7SWei Liu 5308440e22eSGreg Kurz static void coroutine_fn virtfs_reset(V9fsPDU *pdu) 53160ce86c7SWei Liu { 53260ce86c7SWei Liu V9fsState *s = pdu->s; 53379decce3SGreg Kurz V9fsFidState *fidp; 53460ce86c7SWei Liu 53560ce86c7SWei Liu /* Free all fids */ 53660ce86c7SWei Liu while (s->fid_list) { 5376d54af0eSGreg Kurz /* Get fid */ 53860ce86c7SWei Liu fidp = s->fid_list; 5396d54af0eSGreg Kurz fidp->ref++; 54060ce86c7SWei Liu 5416d54af0eSGreg Kurz /* Clunk fid */ 5426d54af0eSGreg Kurz s->fid_list = fidp->next; 54360ce86c7SWei Liu fidp->clunked = 1; 5446d54af0eSGreg Kurz 5456d54af0eSGreg Kurz put_fid(pdu, fidp); 54660ce86c7SWei Liu } 54760ce86c7SWei Liu } 54860ce86c7SWei Liu 54960ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 55060ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 55160ce86c7SWei Liu 55260ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 55360ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 55460ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 55560ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 55660ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 55760ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 55860ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 55960ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 56060ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 56160ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 56260ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 56360ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 56460ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 56560ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 56660ce86c7SWei Liu 56760ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 56860ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 56960ce86c7SWei Liu P9_STAT_MODE_LINK | \ 57060ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 57160ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 57260ce86c7SWei Liu P9_STAT_MODE_SOCKET) 57360ce86c7SWei Liu 57460ce86c7SWei Liu /* This is the algorithm from ufs in spfs */ 57560ce86c7SWei Liu static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) 57660ce86c7SWei Liu { 57760ce86c7SWei Liu size_t size; 57860ce86c7SWei Liu 57960ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 58060ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 58160ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 58260ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 58360ce86c7SWei Liu qidp->type = 0; 58460ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 58560ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 58660ce86c7SWei Liu } 58760ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 58860ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 58960ce86c7SWei Liu } 59060ce86c7SWei Liu } 59160ce86c7SWei Liu 5928440e22eSGreg Kurz static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 5938440e22eSGreg Kurz V9fsQID *qidp) 59460ce86c7SWei Liu { 59560ce86c7SWei Liu struct stat stbuf; 59660ce86c7SWei Liu int err; 59760ce86c7SWei Liu 59860ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 59960ce86c7SWei Liu if (err < 0) { 60060ce86c7SWei Liu return err; 60160ce86c7SWei Liu } 60260ce86c7SWei Liu stat_to_qid(&stbuf, qidp); 60360ce86c7SWei Liu return 0; 60460ce86c7SWei Liu } 60560ce86c7SWei Liu 60660ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 60760ce86c7SWei Liu { 60860ce86c7SWei Liu V9fsPDU *pdu = NULL; 60960ce86c7SWei Liu 61060ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 61160ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 61260ce86c7SWei Liu QLIST_REMOVE(pdu, next); 61360ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 61460ce86c7SWei Liu } 61560ce86c7SWei Liu return pdu; 61660ce86c7SWei Liu } 61760ce86c7SWei Liu 61860ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 61960ce86c7SWei Liu { 62060ce86c7SWei Liu V9fsState *s = pdu->s; 621f74e27bfSGreg Kurz 622f74e27bfSGreg Kurz g_assert(!pdu->cancelled); 62360ce86c7SWei Liu QLIST_REMOVE(pdu, next); 62460ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 62560ce86c7SWei Liu } 62660ce86c7SWei Liu 6278440e22eSGreg Kurz static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) 62860ce86c7SWei Liu { 62960ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 63060ce86c7SWei Liu V9fsState *s = pdu->s; 63106a37db7SGreg Kurz int ret; 63260ce86c7SWei Liu 633fc78d5eeSKeno Fischer /* 634fc78d5eeSKeno Fischer * The 9p spec requires that successfully cancelled pdus receive no reply. 635fc78d5eeSKeno Fischer * Sending a reply would confuse clients because they would 636fc78d5eeSKeno Fischer * assume that any EINTR is the actual result of the operation, 637fc78d5eeSKeno Fischer * rather than a consequence of the cancellation. However, if 638fc78d5eeSKeno Fischer * the operation completed (succesfully or with an error other 639fc78d5eeSKeno Fischer * than caused be cancellation), we do send out that reply, both 640fc78d5eeSKeno Fischer * for efficiency and to avoid confusing the rest of the state machine 641fc78d5eeSKeno Fischer * that assumes passing a non-error here will mean a successful 642fc78d5eeSKeno Fischer * transmission of the reply. 643fc78d5eeSKeno Fischer */ 644fc78d5eeSKeno Fischer bool discard = pdu->cancelled && len == -EINTR; 645fc78d5eeSKeno Fischer if (discard) { 646fc78d5eeSKeno Fischer trace_v9fs_rcancel(pdu->tag, pdu->id); 647fc78d5eeSKeno Fischer pdu->size = 0; 648fc78d5eeSKeno Fischer goto out_notify; 649fc78d5eeSKeno Fischer } 650fc78d5eeSKeno Fischer 65160ce86c7SWei Liu if (len < 0) { 65260ce86c7SWei Liu int err = -len; 65360ce86c7SWei Liu len = 7; 65460ce86c7SWei Liu 65560ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 65660ce86c7SWei Liu V9fsString str; 65760ce86c7SWei Liu 65860ce86c7SWei Liu str.data = strerror(err); 65960ce86c7SWei Liu str.size = strlen(str.data); 66060ce86c7SWei Liu 66106a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "s", &str); 66206a37db7SGreg Kurz if (ret < 0) { 66306a37db7SGreg Kurz goto out_notify; 66406a37db7SGreg Kurz } 66506a37db7SGreg Kurz len += ret; 66660ce86c7SWei Liu id = P9_RERROR; 66760ce86c7SWei Liu } 66860ce86c7SWei Liu 66906a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "d", err); 67006a37db7SGreg Kurz if (ret < 0) { 67106a37db7SGreg Kurz goto out_notify; 67206a37db7SGreg Kurz } 67306a37db7SGreg Kurz len += ret; 67460ce86c7SWei Liu 67560ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 67660ce86c7SWei Liu id = P9_RLERROR; 67760ce86c7SWei Liu } 67860ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 67960ce86c7SWei Liu } 68060ce86c7SWei Liu 68160ce86c7SWei Liu /* fill out the header */ 68206a37db7SGreg Kurz if (pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag) < 0) { 68306a37db7SGreg Kurz goto out_notify; 68406a37db7SGreg Kurz } 68560ce86c7SWei Liu 68660ce86c7SWei Liu /* keep these in sync */ 68760ce86c7SWei Liu pdu->size = len; 68860ce86c7SWei Liu pdu->id = id; 68960ce86c7SWei Liu 69006a37db7SGreg Kurz out_notify: 691a17d8659SGreg Kurz pdu->s->transport->push_and_notify(pdu); 69260ce86c7SWei Liu 69360ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 694f74e27bfSGreg Kurz if (!qemu_co_queue_next(&pdu->complete)) { 69560ce86c7SWei Liu pdu_free(pdu); 69660ce86c7SWei Liu } 697f74e27bfSGreg Kurz } 69860ce86c7SWei Liu 69960ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 70060ce86c7SWei Liu { 70160ce86c7SWei Liu mode_t ret; 70260ce86c7SWei Liu 70360ce86c7SWei Liu ret = mode & 0777; 70460ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 70560ce86c7SWei Liu ret |= S_IFDIR; 70660ce86c7SWei Liu } 70760ce86c7SWei Liu 70860ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 70960ce86c7SWei Liu ret |= S_IFLNK; 71060ce86c7SWei Liu } 71160ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 71260ce86c7SWei Liu ret |= S_IFSOCK; 71360ce86c7SWei Liu } 71460ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 71560ce86c7SWei Liu ret |= S_IFIFO; 71660ce86c7SWei Liu } 71760ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 71860ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 71960ce86c7SWei Liu ret |= S_IFCHR; 72060ce86c7SWei Liu } else { 72160ce86c7SWei Liu ret |= S_IFBLK; 72260ce86c7SWei Liu } 72360ce86c7SWei Liu } 72460ce86c7SWei Liu 72560ce86c7SWei Liu if (!(ret&~0777)) { 72660ce86c7SWei Liu ret |= S_IFREG; 72760ce86c7SWei Liu } 72860ce86c7SWei Liu 72960ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 73060ce86c7SWei Liu ret |= S_ISUID; 73160ce86c7SWei Liu } 73260ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 73360ce86c7SWei Liu ret |= S_ISGID; 73460ce86c7SWei Liu } 73560ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 73660ce86c7SWei Liu ret |= S_ISVTX; 73760ce86c7SWei Liu } 73860ce86c7SWei Liu 73960ce86c7SWei Liu return ret; 74060ce86c7SWei Liu } 74160ce86c7SWei Liu 74260ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 74360ce86c7SWei Liu { 74460ce86c7SWei Liu if (stat->type == -1 && 74560ce86c7SWei Liu stat->dev == -1 && 74660ce86c7SWei Liu stat->qid.type == -1 && 74760ce86c7SWei Liu stat->qid.version == -1 && 74860ce86c7SWei Liu stat->qid.path == -1 && 74960ce86c7SWei Liu stat->mode == -1 && 75060ce86c7SWei Liu stat->atime == -1 && 75160ce86c7SWei Liu stat->mtime == -1 && 75260ce86c7SWei Liu stat->length == -1 && 75360ce86c7SWei Liu !stat->name.size && 75460ce86c7SWei Liu !stat->uid.size && 75560ce86c7SWei Liu !stat->gid.size && 75660ce86c7SWei Liu !stat->muid.size && 75760ce86c7SWei Liu stat->n_uid == -1 && 75860ce86c7SWei Liu stat->n_gid == -1 && 75960ce86c7SWei Liu stat->n_muid == -1) { 76060ce86c7SWei Liu return 1; 76160ce86c7SWei Liu } 76260ce86c7SWei Liu 76360ce86c7SWei Liu return 0; 76460ce86c7SWei Liu } 76560ce86c7SWei Liu 76660ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 76760ce86c7SWei Liu { 76860ce86c7SWei Liu v9fs_string_init(&stat->name); 76960ce86c7SWei Liu v9fs_string_init(&stat->uid); 77060ce86c7SWei Liu v9fs_string_init(&stat->gid); 77160ce86c7SWei Liu v9fs_string_init(&stat->muid); 77260ce86c7SWei Liu v9fs_string_init(&stat->extension); 77360ce86c7SWei Liu } 77460ce86c7SWei Liu 77560ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 77660ce86c7SWei Liu { 77760ce86c7SWei Liu v9fs_string_free(&stat->name); 77860ce86c7SWei Liu v9fs_string_free(&stat->uid); 77960ce86c7SWei Liu v9fs_string_free(&stat->gid); 78060ce86c7SWei Liu v9fs_string_free(&stat->muid); 78160ce86c7SWei Liu v9fs_string_free(&stat->extension); 78260ce86c7SWei Liu } 78360ce86c7SWei Liu 78460ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 78560ce86c7SWei Liu { 78660ce86c7SWei Liu uint32_t mode; 78760ce86c7SWei Liu 78860ce86c7SWei Liu mode = stbuf->st_mode & 0777; 78960ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 79060ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 79160ce86c7SWei Liu } 79260ce86c7SWei Liu 79360ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 79460ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 79560ce86c7SWei Liu } 79660ce86c7SWei Liu 79760ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 79860ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 79960ce86c7SWei Liu } 80060ce86c7SWei Liu 80160ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 80260ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 80360ce86c7SWei Liu } 80460ce86c7SWei Liu 80560ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 80660ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 80760ce86c7SWei Liu } 80860ce86c7SWei Liu 80960ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 81060ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 81160ce86c7SWei Liu } 81260ce86c7SWei Liu 81360ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 81460ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 81560ce86c7SWei Liu } 81660ce86c7SWei Liu 81760ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 81860ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 81960ce86c7SWei Liu } 82060ce86c7SWei Liu 82160ce86c7SWei Liu return mode; 82260ce86c7SWei Liu } 82360ce86c7SWei Liu 8246069537fSJan Dakinevich static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *path, 8256069537fSJan Dakinevich const char *basename, 82660ce86c7SWei Liu const struct stat *stbuf, 82760ce86c7SWei Liu V9fsStat *v9stat) 82860ce86c7SWei Liu { 82960ce86c7SWei Liu int err; 83060ce86c7SWei Liu 83160ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 83260ce86c7SWei Liu 83360ce86c7SWei Liu stat_to_qid(stbuf, &v9stat->qid); 83460ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 83560ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 83660ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 83760ce86c7SWei Liu v9stat->length = stbuf->st_size; 83860ce86c7SWei Liu 839abdf0086SGreg Kurz v9fs_string_free(&v9stat->uid); 840abdf0086SGreg Kurz v9fs_string_free(&v9stat->gid); 841abdf0086SGreg Kurz v9fs_string_free(&v9stat->muid); 84260ce86c7SWei Liu 84360ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 84460ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 84560ce86c7SWei Liu v9stat->n_muid = 0; 84660ce86c7SWei Liu 847abdf0086SGreg Kurz v9fs_string_free(&v9stat->extension); 84860ce86c7SWei Liu 84960ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 8506069537fSJan Dakinevich err = v9fs_co_readlink(pdu, path, &v9stat->extension); 85160ce86c7SWei Liu if (err < 0) { 85260ce86c7SWei Liu return err; 85360ce86c7SWei Liu } 85460ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 85560ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 85660ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 85760ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 85860ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 85960ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 86060ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 86160ce86c7SWei Liu } 86260ce86c7SWei Liu 8636069537fSJan Dakinevich v9fs_string_sprintf(&v9stat->name, "%s", basename); 86460ce86c7SWei Liu 86560ce86c7SWei Liu v9stat->size = 61 + 86660ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 86760ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 86860ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 86960ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 87060ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 87160ce86c7SWei Liu return 0; 87260ce86c7SWei Liu } 87360ce86c7SWei Liu 87460ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 87560ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 87660ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 87760ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 87860ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 87960ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 88060ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 88160ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 88260ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 88360ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 88460ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 88560ce86c7SWei Liu 88660ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 88760ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 88860ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 88960ce86c7SWei Liu 89060ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 89160ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 89260ce86c7SWei Liu 89360ce86c7SWei Liu 89460ce86c7SWei Liu static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, 89560ce86c7SWei Liu V9fsStatDotl *v9lstat) 89660ce86c7SWei Liu { 89760ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 89860ce86c7SWei Liu 89960ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 90060ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 90160ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 90260ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 90360ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 90460ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 90560ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 90660ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 90760ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 90860ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 90960ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 91060ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 91160ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 91260ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 91360ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 91460ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 91560ce86c7SWei Liu 91660ce86c7SWei Liu stat_to_qid(stbuf, &v9lstat->qid); 91760ce86c7SWei Liu } 91860ce86c7SWei Liu 91960ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 92060ce86c7SWei Liu { 92160ce86c7SWei Liu int i; 92260ce86c7SWei Liu 92360ce86c7SWei Liu printf("sg[%d]: {", cnt); 92460ce86c7SWei Liu for (i = 0; i < cnt; i++) { 92560ce86c7SWei Liu if (i) { 92660ce86c7SWei Liu printf(", "); 92760ce86c7SWei Liu } 92860ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 92960ce86c7SWei Liu } 93060ce86c7SWei Liu printf("}\n"); 93160ce86c7SWei Liu } 93260ce86c7SWei Liu 93360ce86c7SWei Liu /* Will call this only for path name based fid */ 93460ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 93560ce86c7SWei Liu { 93660ce86c7SWei Liu V9fsPath str; 93760ce86c7SWei Liu v9fs_path_init(&str); 93860ce86c7SWei Liu v9fs_path_copy(&str, dst); 939e3e83f2eSGreg Kurz v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); 94060ce86c7SWei Liu v9fs_path_free(&str); 94160ce86c7SWei Liu } 94260ce86c7SWei Liu 94360ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 94460ce86c7SWei Liu { 94560ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 94660ce86c7SWei Liu } 94760ce86c7SWei Liu 9488440e22eSGreg Kurz static void coroutine_fn v9fs_version(void *opaque) 94960ce86c7SWei Liu { 95060ce86c7SWei Liu ssize_t err; 95160ce86c7SWei Liu V9fsPDU *pdu = opaque; 95260ce86c7SWei Liu V9fsState *s = pdu->s; 95360ce86c7SWei Liu V9fsString version; 95460ce86c7SWei Liu size_t offset = 7; 95560ce86c7SWei Liu 95660ce86c7SWei Liu v9fs_string_init(&version); 95760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 95860ce86c7SWei Liu if (err < 0) { 95960ce86c7SWei Liu goto out; 96060ce86c7SWei Liu } 96160ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 96260ce86c7SWei Liu 96360ce86c7SWei Liu virtfs_reset(pdu); 96460ce86c7SWei Liu 96560ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 96660ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 96760ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 96860ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 96960ce86c7SWei Liu } else { 97060ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 97160ce86c7SWei Liu } 97260ce86c7SWei Liu 97360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 97460ce86c7SWei Liu if (err < 0) { 97560ce86c7SWei Liu goto out; 97660ce86c7SWei Liu } 977403a905bSPhilippe Mathieu-Daudé err += offset; 97860ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 97960ce86c7SWei Liu out: 980403a905bSPhilippe Mathieu-Daudé pdu_complete(pdu, err); 98160ce86c7SWei Liu v9fs_string_free(&version); 98260ce86c7SWei Liu } 98360ce86c7SWei Liu 9848440e22eSGreg Kurz static void coroutine_fn v9fs_attach(void *opaque) 98560ce86c7SWei Liu { 98660ce86c7SWei Liu V9fsPDU *pdu = opaque; 98760ce86c7SWei Liu V9fsState *s = pdu->s; 98860ce86c7SWei Liu int32_t fid, afid, n_uname; 98960ce86c7SWei Liu V9fsString uname, aname; 99060ce86c7SWei Liu V9fsFidState *fidp; 99160ce86c7SWei Liu size_t offset = 7; 99260ce86c7SWei Liu V9fsQID qid; 99360ce86c7SWei Liu ssize_t err; 994fe44dc91SAshijeet Acharya Error *local_err = NULL; 99560ce86c7SWei Liu 99660ce86c7SWei Liu v9fs_string_init(&uname); 99760ce86c7SWei Liu v9fs_string_init(&aname); 99860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 99960ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 100060ce86c7SWei Liu if (err < 0) { 100160ce86c7SWei Liu goto out_nofid; 100260ce86c7SWei Liu } 100360ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 100460ce86c7SWei Liu 100560ce86c7SWei Liu fidp = alloc_fid(s, fid); 100660ce86c7SWei Liu if (fidp == NULL) { 100760ce86c7SWei Liu err = -EINVAL; 100860ce86c7SWei Liu goto out_nofid; 100960ce86c7SWei Liu } 101060ce86c7SWei Liu fidp->uid = n_uname; 101160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 101260ce86c7SWei Liu if (err < 0) { 101360ce86c7SWei Liu err = -EINVAL; 101460ce86c7SWei Liu clunk_fid(s, fid); 101560ce86c7SWei Liu goto out; 101660ce86c7SWei Liu } 101760ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 101860ce86c7SWei Liu if (err < 0) { 101960ce86c7SWei Liu err = -EINVAL; 102060ce86c7SWei Liu clunk_fid(s, fid); 102160ce86c7SWei Liu goto out; 102260ce86c7SWei Liu } 1023fe44dc91SAshijeet Acharya 1024fe44dc91SAshijeet Acharya /* 1025fe44dc91SAshijeet Acharya * disable migration if we haven't done already. 1026fe44dc91SAshijeet Acharya * attach could get called multiple times for the same export. 1027fe44dc91SAshijeet Acharya */ 1028fe44dc91SAshijeet Acharya if (!s->migration_blocker) { 1029fe44dc91SAshijeet Acharya error_setg(&s->migration_blocker, 1030fe44dc91SAshijeet Acharya "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 1031fe44dc91SAshijeet Acharya s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 1032fe44dc91SAshijeet Acharya err = migrate_add_blocker(s->migration_blocker, &local_err); 1033fe44dc91SAshijeet Acharya if (local_err) { 1034fe44dc91SAshijeet Acharya error_free(local_err); 1035fe44dc91SAshijeet Acharya error_free(s->migration_blocker); 1036fe44dc91SAshijeet Acharya s->migration_blocker = NULL; 1037fe44dc91SAshijeet Acharya clunk_fid(s, fid); 1038fe44dc91SAshijeet Acharya goto out; 1039fe44dc91SAshijeet Acharya } 1040fe44dc91SAshijeet Acharya s->root_fid = fid; 1041fe44dc91SAshijeet Acharya } 1042fe44dc91SAshijeet Acharya 104360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 104460ce86c7SWei Liu if (err < 0) { 104560ce86c7SWei Liu clunk_fid(s, fid); 104660ce86c7SWei Liu goto out; 104760ce86c7SWei Liu } 104860ce86c7SWei Liu err += offset; 1049fe44dc91SAshijeet Acharya 105056f101ecSGreg Kurz memcpy(&s->root_qid, &qid, sizeof(qid)); 105160ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 105260ce86c7SWei Liu qid.type, qid.version, qid.path); 105360ce86c7SWei Liu out: 105460ce86c7SWei Liu put_fid(pdu, fidp); 105560ce86c7SWei Liu out_nofid: 105660ce86c7SWei Liu pdu_complete(pdu, err); 105760ce86c7SWei Liu v9fs_string_free(&uname); 105860ce86c7SWei Liu v9fs_string_free(&aname); 105960ce86c7SWei Liu } 106060ce86c7SWei Liu 10618440e22eSGreg Kurz static void coroutine_fn v9fs_stat(void *opaque) 106260ce86c7SWei Liu { 106360ce86c7SWei Liu int32_t fid; 106460ce86c7SWei Liu V9fsStat v9stat; 106560ce86c7SWei Liu ssize_t err = 0; 106660ce86c7SWei Liu size_t offset = 7; 106760ce86c7SWei Liu struct stat stbuf; 106860ce86c7SWei Liu V9fsFidState *fidp; 106960ce86c7SWei Liu V9fsPDU *pdu = opaque; 10706069537fSJan Dakinevich char *basename; 107160ce86c7SWei Liu 107260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 107360ce86c7SWei Liu if (err < 0) { 107460ce86c7SWei Liu goto out_nofid; 107560ce86c7SWei Liu } 107660ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 107760ce86c7SWei Liu 107860ce86c7SWei Liu fidp = get_fid(pdu, fid); 107960ce86c7SWei Liu if (fidp == NULL) { 108060ce86c7SWei Liu err = -ENOENT; 108160ce86c7SWei Liu goto out_nofid; 108260ce86c7SWei Liu } 108360ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 108460ce86c7SWei Liu if (err < 0) { 108560ce86c7SWei Liu goto out; 108660ce86c7SWei Liu } 10876069537fSJan Dakinevich basename = g_path_get_basename(fidp->path.data); 10886069537fSJan Dakinevich err = stat_to_v9stat(pdu, &fidp->path, basename, &stbuf, &v9stat); 10896069537fSJan Dakinevich g_free(basename); 109060ce86c7SWei Liu if (err < 0) { 109160ce86c7SWei Liu goto out; 109260ce86c7SWei Liu } 109360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 109460ce86c7SWei Liu if (err < 0) { 109560ce86c7SWei Liu v9fs_stat_free(&v9stat); 109660ce86c7SWei Liu goto out; 109760ce86c7SWei Liu } 109860ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 109960ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 110060ce86c7SWei Liu err += offset; 110160ce86c7SWei Liu v9fs_stat_free(&v9stat); 110260ce86c7SWei Liu out: 110360ce86c7SWei Liu put_fid(pdu, fidp); 110460ce86c7SWei Liu out_nofid: 110560ce86c7SWei Liu pdu_complete(pdu, err); 110660ce86c7SWei Liu } 110760ce86c7SWei Liu 11088440e22eSGreg Kurz static void coroutine_fn v9fs_getattr(void *opaque) 110960ce86c7SWei Liu { 111060ce86c7SWei Liu int32_t fid; 111160ce86c7SWei Liu size_t offset = 7; 111260ce86c7SWei Liu ssize_t retval = 0; 111360ce86c7SWei Liu struct stat stbuf; 111460ce86c7SWei Liu V9fsFidState *fidp; 111560ce86c7SWei Liu uint64_t request_mask; 111660ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 111760ce86c7SWei Liu V9fsPDU *pdu = opaque; 111860ce86c7SWei Liu V9fsState *s = pdu->s; 111960ce86c7SWei Liu 112060ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 112160ce86c7SWei Liu if (retval < 0) { 112260ce86c7SWei Liu goto out_nofid; 112360ce86c7SWei Liu } 112460ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 112560ce86c7SWei Liu 112660ce86c7SWei Liu fidp = get_fid(pdu, fid); 112760ce86c7SWei Liu if (fidp == NULL) { 112860ce86c7SWei Liu retval = -ENOENT; 112960ce86c7SWei Liu goto out_nofid; 113060ce86c7SWei Liu } 113160ce86c7SWei Liu /* 113260ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 113360ce86c7SWei Liu * need to look at request_mask. 113460ce86c7SWei Liu */ 113560ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 113660ce86c7SWei Liu if (retval < 0) { 113760ce86c7SWei Liu goto out; 113860ce86c7SWei Liu } 113960ce86c7SWei Liu stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); 114060ce86c7SWei Liu 114160ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 114260ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 114360ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 114460ce86c7SWei Liu switch (retval) { 114560ce86c7SWei Liu case 0: 114660ce86c7SWei Liu /* we have valid st_gen: update result mask */ 114760ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 114860ce86c7SWei Liu break; 114960ce86c7SWei Liu case -EINTR: 115060ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 115160ce86c7SWei Liu goto out; 115260ce86c7SWei Liu default: 115360ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 115460ce86c7SWei Liu break; 115560ce86c7SWei Liu } 115660ce86c7SWei Liu } 115760ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 115860ce86c7SWei Liu if (retval < 0) { 115960ce86c7SWei Liu goto out; 116060ce86c7SWei Liu } 116160ce86c7SWei Liu retval += offset; 116260ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 116360ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 116460ce86c7SWei Liu v9stat_dotl.st_gid); 116560ce86c7SWei Liu out: 116660ce86c7SWei Liu put_fid(pdu, fidp); 116760ce86c7SWei Liu out_nofid: 116860ce86c7SWei Liu pdu_complete(pdu, retval); 116960ce86c7SWei Liu } 117060ce86c7SWei Liu 117160ce86c7SWei Liu /* Attribute flags */ 117260ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 117360ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 117460ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 117560ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 117660ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 117760ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 117860ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 117960ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 118060ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 118160ce86c7SWei Liu 118260ce86c7SWei Liu #define P9_ATTR_MASK 127 118360ce86c7SWei Liu 11848440e22eSGreg Kurz static void coroutine_fn v9fs_setattr(void *opaque) 118560ce86c7SWei Liu { 118660ce86c7SWei Liu int err = 0; 118760ce86c7SWei Liu int32_t fid; 118860ce86c7SWei Liu V9fsFidState *fidp; 118960ce86c7SWei Liu size_t offset = 7; 119060ce86c7SWei Liu V9fsIattr v9iattr; 119160ce86c7SWei Liu V9fsPDU *pdu = opaque; 119260ce86c7SWei Liu 119360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 119460ce86c7SWei Liu if (err < 0) { 119560ce86c7SWei Liu goto out_nofid; 119660ce86c7SWei Liu } 119760ce86c7SWei Liu 11988f9c64bfSGreg Kurz trace_v9fs_setattr(pdu->tag, pdu->id, fid, 11998f9c64bfSGreg Kurz v9iattr.valid, v9iattr.mode, v9iattr.uid, v9iattr.gid, 12008f9c64bfSGreg Kurz v9iattr.size, v9iattr.atime_sec, v9iattr.mtime_sec); 12018f9c64bfSGreg Kurz 120260ce86c7SWei Liu fidp = get_fid(pdu, fid); 120360ce86c7SWei Liu if (fidp == NULL) { 120460ce86c7SWei Liu err = -EINVAL; 120560ce86c7SWei Liu goto out_nofid; 120660ce86c7SWei Liu } 120760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 120860ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 120960ce86c7SWei Liu if (err < 0) { 121060ce86c7SWei Liu goto out; 121160ce86c7SWei Liu } 121260ce86c7SWei Liu } 121360ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 121460ce86c7SWei Liu struct timespec times[2]; 121560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 121660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 121760ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 121860ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 121960ce86c7SWei Liu } else { 122060ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 122160ce86c7SWei Liu } 122260ce86c7SWei Liu } else { 122360ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 122460ce86c7SWei Liu } 122560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 122660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 122760ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 122860ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 122960ce86c7SWei Liu } else { 123060ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 123160ce86c7SWei Liu } 123260ce86c7SWei Liu } else { 123360ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 123460ce86c7SWei Liu } 123560ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 123660ce86c7SWei Liu if (err < 0) { 123760ce86c7SWei Liu goto out; 123860ce86c7SWei Liu } 123960ce86c7SWei Liu } 124060ce86c7SWei Liu /* 124160ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 124260ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 124360ce86c7SWei Liu */ 124460ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 124560ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 124660ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 124760ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 124860ce86c7SWei Liu v9iattr.uid = -1; 124960ce86c7SWei Liu } 125060ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 125160ce86c7SWei Liu v9iattr.gid = -1; 125260ce86c7SWei Liu } 125360ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 125460ce86c7SWei Liu v9iattr.gid); 125560ce86c7SWei Liu if (err < 0) { 125660ce86c7SWei Liu goto out; 125760ce86c7SWei Liu } 125860ce86c7SWei Liu } 125960ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 126060ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 126160ce86c7SWei Liu if (err < 0) { 126260ce86c7SWei Liu goto out; 126360ce86c7SWei Liu } 126460ce86c7SWei Liu } 126560ce86c7SWei Liu err = offset; 12668f9c64bfSGreg Kurz trace_v9fs_setattr_return(pdu->tag, pdu->id); 126760ce86c7SWei Liu out: 126860ce86c7SWei Liu put_fid(pdu, fidp); 126960ce86c7SWei Liu out_nofid: 127060ce86c7SWei Liu pdu_complete(pdu, err); 127160ce86c7SWei Liu } 127260ce86c7SWei Liu 127360ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 127460ce86c7SWei Liu { 127560ce86c7SWei Liu int i; 127660ce86c7SWei Liu ssize_t err; 127760ce86c7SWei Liu size_t offset = 7; 127860ce86c7SWei Liu 127960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 128060ce86c7SWei Liu if (err < 0) { 128160ce86c7SWei Liu return err; 128260ce86c7SWei Liu } 128360ce86c7SWei Liu offset += err; 128460ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 128560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 128660ce86c7SWei Liu if (err < 0) { 128760ce86c7SWei Liu return err; 128860ce86c7SWei Liu } 128960ce86c7SWei Liu offset += err; 129060ce86c7SWei Liu } 129160ce86c7SWei Liu return offset; 129260ce86c7SWei Liu } 129360ce86c7SWei Liu 1294fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1295fff39a7aSGreg Kurz { 1296fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1297fff39a7aSGreg Kurz } 1298fff39a7aSGreg Kurz 129956f101ecSGreg Kurz static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) 130056f101ecSGreg Kurz { 130156f101ecSGreg Kurz return 130256f101ecSGreg Kurz qid1->type != qid2->type || 130356f101ecSGreg Kurz qid1->version != qid2->version || 130456f101ecSGreg Kurz qid1->path != qid2->path; 130556f101ecSGreg Kurz } 130656f101ecSGreg Kurz 13078440e22eSGreg Kurz static void coroutine_fn v9fs_walk(void *opaque) 130860ce86c7SWei Liu { 130960ce86c7SWei Liu int name_idx; 131060ce86c7SWei Liu V9fsQID *qids = NULL; 131160ce86c7SWei Liu int i, err = 0; 131260ce86c7SWei Liu V9fsPath dpath, path; 131360ce86c7SWei Liu uint16_t nwnames; 131460ce86c7SWei Liu struct stat stbuf; 131560ce86c7SWei Liu size_t offset = 7; 131660ce86c7SWei Liu int32_t fid, newfid; 131760ce86c7SWei Liu V9fsString *wnames = NULL; 131860ce86c7SWei Liu V9fsFidState *fidp; 131960ce86c7SWei Liu V9fsFidState *newfidp = NULL; 132060ce86c7SWei Liu V9fsPDU *pdu = opaque; 132160ce86c7SWei Liu V9fsState *s = pdu->s; 132256f101ecSGreg Kurz V9fsQID qid; 132360ce86c7SWei Liu 132460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 132560ce86c7SWei Liu if (err < 0) { 132660ce86c7SWei Liu pdu_complete(pdu, err); 132760ce86c7SWei Liu return ; 132860ce86c7SWei Liu } 132960ce86c7SWei Liu offset += err; 133060ce86c7SWei Liu 133160ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 133260ce86c7SWei Liu 133360ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 133460ce86c7SWei Liu wnames = g_malloc0(sizeof(wnames[0]) * nwnames); 133560ce86c7SWei Liu qids = g_malloc0(sizeof(qids[0]) * nwnames); 133660ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 133760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 133860ce86c7SWei Liu if (err < 0) { 133960ce86c7SWei Liu goto out_nofid; 134060ce86c7SWei Liu } 1341fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1342fff39a7aSGreg Kurz err = -ENOENT; 1343fff39a7aSGreg Kurz goto out_nofid; 1344fff39a7aSGreg Kurz } 134560ce86c7SWei Liu offset += err; 134660ce86c7SWei Liu } 134760ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 134860ce86c7SWei Liu err = -EINVAL; 134960ce86c7SWei Liu goto out_nofid; 135060ce86c7SWei Liu } 135160ce86c7SWei Liu fidp = get_fid(pdu, fid); 135260ce86c7SWei Liu if (fidp == NULL) { 135360ce86c7SWei Liu err = -ENOENT; 135460ce86c7SWei Liu goto out_nofid; 135560ce86c7SWei Liu } 135656f101ecSGreg Kurz 135713fd08e6SGreg Kurz v9fs_path_init(&dpath); 135813fd08e6SGreg Kurz v9fs_path_init(&path); 135913fd08e6SGreg Kurz 136056f101ecSGreg Kurz err = fid_to_qid(pdu, fidp, &qid); 136156f101ecSGreg Kurz if (err < 0) { 136256f101ecSGreg Kurz goto out; 136356f101ecSGreg Kurz } 136456f101ecSGreg Kurz 136560ce86c7SWei Liu /* 136660ce86c7SWei Liu * Both dpath and path initially poin to fidp. 136760ce86c7SWei Liu * Needed to handle request with nwnames == 0 136860ce86c7SWei Liu */ 136960ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 137060ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 137160ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 137256f101ecSGreg Kurz if (not_same_qid(&pdu->s->root_qid, &qid) || 137356f101ecSGreg Kurz strcmp("..", wnames[name_idx].data)) { 137456f101ecSGreg Kurz err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, 137556f101ecSGreg Kurz &path); 137660ce86c7SWei Liu if (err < 0) { 137760ce86c7SWei Liu goto out; 137860ce86c7SWei Liu } 137956f101ecSGreg Kurz 138060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 138160ce86c7SWei Liu if (err < 0) { 138260ce86c7SWei Liu goto out; 138360ce86c7SWei Liu } 138456f101ecSGreg Kurz stat_to_qid(&stbuf, &qid); 138560ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 138660ce86c7SWei Liu } 138756f101ecSGreg Kurz memcpy(&qids[name_idx], &qid, sizeof(qid)); 138856f101ecSGreg Kurz } 138960ce86c7SWei Liu if (fid == newfid) { 139049dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 139149dd946bSGreg Kurz err = -EINVAL; 139249dd946bSGreg Kurz goto out; 139349dd946bSGreg Kurz } 139460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 139560ce86c7SWei Liu } else { 139660ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 139760ce86c7SWei Liu if (newfidp == NULL) { 139860ce86c7SWei Liu err = -EINVAL; 139960ce86c7SWei Liu goto out; 140060ce86c7SWei Liu } 140160ce86c7SWei Liu newfidp->uid = fidp->uid; 140260ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 140360ce86c7SWei Liu } 140460ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 140560ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 140660ce86c7SWei Liu out: 140760ce86c7SWei Liu put_fid(pdu, fidp); 140860ce86c7SWei Liu if (newfidp) { 140960ce86c7SWei Liu put_fid(pdu, newfidp); 141060ce86c7SWei Liu } 141160ce86c7SWei Liu v9fs_path_free(&dpath); 141260ce86c7SWei Liu v9fs_path_free(&path); 141360ce86c7SWei Liu out_nofid: 141460ce86c7SWei Liu pdu_complete(pdu, err); 141560ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 141660ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 141760ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 141860ce86c7SWei Liu } 141960ce86c7SWei Liu g_free(wnames); 142060ce86c7SWei Liu g_free(qids); 142160ce86c7SWei Liu } 142260ce86c7SWei Liu } 142360ce86c7SWei Liu 14248440e22eSGreg Kurz static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) 142560ce86c7SWei Liu { 142660ce86c7SWei Liu struct statfs stbuf; 142760ce86c7SWei Liu int32_t iounit = 0; 142860ce86c7SWei Liu V9fsState *s = pdu->s; 142960ce86c7SWei Liu 143060ce86c7SWei Liu /* 143160ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 143260ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 143360ce86c7SWei Liu */ 143460ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 143560ce86c7SWei Liu iounit = stbuf.f_bsize; 143660ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 143760ce86c7SWei Liu } 143860ce86c7SWei Liu if (!iounit) { 143960ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 144060ce86c7SWei Liu } 144160ce86c7SWei Liu return iounit; 144260ce86c7SWei Liu } 144360ce86c7SWei Liu 14448440e22eSGreg Kurz static void coroutine_fn v9fs_open(void *opaque) 144560ce86c7SWei Liu { 144660ce86c7SWei Liu int flags; 144760ce86c7SWei Liu int32_t fid; 144860ce86c7SWei Liu int32_t mode; 144960ce86c7SWei Liu V9fsQID qid; 145060ce86c7SWei Liu int iounit = 0; 145160ce86c7SWei Liu ssize_t err = 0; 145260ce86c7SWei Liu size_t offset = 7; 145360ce86c7SWei Liu struct stat stbuf; 145460ce86c7SWei Liu V9fsFidState *fidp; 145560ce86c7SWei Liu V9fsPDU *pdu = opaque; 145660ce86c7SWei Liu V9fsState *s = pdu->s; 145760ce86c7SWei Liu 145860ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 145960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 146060ce86c7SWei Liu } else { 146160ce86c7SWei Liu uint8_t modebyte; 146260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 146360ce86c7SWei Liu mode = modebyte; 146460ce86c7SWei Liu } 146560ce86c7SWei Liu if (err < 0) { 146660ce86c7SWei Liu goto out_nofid; 146760ce86c7SWei Liu } 146860ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 146960ce86c7SWei Liu 147060ce86c7SWei Liu fidp = get_fid(pdu, fid); 147160ce86c7SWei Liu if (fidp == NULL) { 147260ce86c7SWei Liu err = -ENOENT; 147360ce86c7SWei Liu goto out_nofid; 147460ce86c7SWei Liu } 147549dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 147649dd946bSGreg Kurz err = -EINVAL; 147749dd946bSGreg Kurz goto out; 147849dd946bSGreg Kurz } 147960ce86c7SWei Liu 148060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 148160ce86c7SWei Liu if (err < 0) { 148260ce86c7SWei Liu goto out; 148360ce86c7SWei Liu } 148460ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 148560ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 148660ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 148760ce86c7SWei Liu if (err < 0) { 148860ce86c7SWei Liu goto out; 148960ce86c7SWei Liu } 149060ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 149160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 149260ce86c7SWei Liu if (err < 0) { 149360ce86c7SWei Liu goto out; 149460ce86c7SWei Liu } 149560ce86c7SWei Liu err += offset; 149660ce86c7SWei Liu } else { 149760ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 149860ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 149960ce86c7SWei Liu } else { 150060ce86c7SWei Liu flags = omode_to_uflags(mode); 150160ce86c7SWei Liu } 150260ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 150360ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 150460ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 150560ce86c7SWei Liu err = -EROFS; 150660ce86c7SWei Liu goto out; 150760ce86c7SWei Liu } 150860ce86c7SWei Liu } 150960ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 151060ce86c7SWei Liu if (err < 0) { 151160ce86c7SWei Liu goto out; 151260ce86c7SWei Liu } 151360ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 151460ce86c7SWei Liu fidp->open_flags = flags; 151560ce86c7SWei Liu if (flags & O_EXCL) { 151660ce86c7SWei Liu /* 151760ce86c7SWei Liu * We let the host file system do O_EXCL check 151860ce86c7SWei Liu * We should not reclaim such fd 151960ce86c7SWei Liu */ 152060ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 152160ce86c7SWei Liu } 152260ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 152360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 152460ce86c7SWei Liu if (err < 0) { 152560ce86c7SWei Liu goto out; 152660ce86c7SWei Liu } 152760ce86c7SWei Liu err += offset; 152860ce86c7SWei Liu } 152960ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 153060ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 153160ce86c7SWei Liu out: 153260ce86c7SWei Liu put_fid(pdu, fidp); 153360ce86c7SWei Liu out_nofid: 153460ce86c7SWei Liu pdu_complete(pdu, err); 153560ce86c7SWei Liu } 153660ce86c7SWei Liu 15378440e22eSGreg Kurz static void coroutine_fn v9fs_lcreate(void *opaque) 153860ce86c7SWei Liu { 153960ce86c7SWei Liu int32_t dfid, flags, mode; 154060ce86c7SWei Liu gid_t gid; 154160ce86c7SWei Liu ssize_t err = 0; 154260ce86c7SWei Liu ssize_t offset = 7; 154360ce86c7SWei Liu V9fsString name; 154460ce86c7SWei Liu V9fsFidState *fidp; 154560ce86c7SWei Liu struct stat stbuf; 154660ce86c7SWei Liu V9fsQID qid; 154760ce86c7SWei Liu int32_t iounit; 154860ce86c7SWei Liu V9fsPDU *pdu = opaque; 154960ce86c7SWei Liu 155060ce86c7SWei Liu v9fs_string_init(&name); 155160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 155260ce86c7SWei Liu &name, &flags, &mode, &gid); 155360ce86c7SWei Liu if (err < 0) { 155460ce86c7SWei Liu goto out_nofid; 155560ce86c7SWei Liu } 155660ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 155760ce86c7SWei Liu 1558fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1559fff39a7aSGreg Kurz err = -ENOENT; 1560fff39a7aSGreg Kurz goto out_nofid; 1561fff39a7aSGreg Kurz } 1562fff39a7aSGreg Kurz 1563805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1564805b5d98SGreg Kurz err = -EEXIST; 1565805b5d98SGreg Kurz goto out_nofid; 1566805b5d98SGreg Kurz } 1567805b5d98SGreg Kurz 156860ce86c7SWei Liu fidp = get_fid(pdu, dfid); 156960ce86c7SWei Liu if (fidp == NULL) { 157060ce86c7SWei Liu err = -ENOENT; 157160ce86c7SWei Liu goto out_nofid; 157260ce86c7SWei Liu } 1573d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 1574d63fb193SLi Qiang err = -EINVAL; 1575d63fb193SLi Qiang goto out; 1576d63fb193SLi Qiang } 157760ce86c7SWei Liu 157860ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 157960ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 158060ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 158160ce86c7SWei Liu if (err < 0) { 158260ce86c7SWei Liu goto out; 158360ce86c7SWei Liu } 158460ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 158560ce86c7SWei Liu fidp->open_flags = flags; 158660ce86c7SWei Liu if (flags & O_EXCL) { 158760ce86c7SWei Liu /* 158860ce86c7SWei Liu * We let the host file system do O_EXCL check 158960ce86c7SWei Liu * We should not reclaim such fd 159060ce86c7SWei Liu */ 159160ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 159260ce86c7SWei Liu } 159360ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 159460ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 159560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 159660ce86c7SWei Liu if (err < 0) { 159760ce86c7SWei Liu goto out; 159860ce86c7SWei Liu } 159960ce86c7SWei Liu err += offset; 160060ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 160160ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 160260ce86c7SWei Liu out: 160360ce86c7SWei Liu put_fid(pdu, fidp); 160460ce86c7SWei Liu out_nofid: 160560ce86c7SWei Liu pdu_complete(pdu, err); 160660ce86c7SWei Liu v9fs_string_free(&name); 160760ce86c7SWei Liu } 160860ce86c7SWei Liu 1609a1bf8b74SGreg Kurz static void coroutine_fn v9fs_fsync(void *opaque) 161060ce86c7SWei Liu { 161160ce86c7SWei Liu int err; 161260ce86c7SWei Liu int32_t fid; 161360ce86c7SWei Liu int datasync; 161460ce86c7SWei Liu size_t offset = 7; 161560ce86c7SWei Liu V9fsFidState *fidp; 161660ce86c7SWei Liu V9fsPDU *pdu = opaque; 161760ce86c7SWei Liu 161860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 161960ce86c7SWei Liu if (err < 0) { 162060ce86c7SWei Liu goto out_nofid; 162160ce86c7SWei Liu } 162260ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 162360ce86c7SWei Liu 162460ce86c7SWei Liu fidp = get_fid(pdu, fid); 162560ce86c7SWei Liu if (fidp == NULL) { 162660ce86c7SWei Liu err = -ENOENT; 162760ce86c7SWei Liu goto out_nofid; 162860ce86c7SWei Liu } 162960ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 163060ce86c7SWei Liu if (!err) { 163160ce86c7SWei Liu err = offset; 163260ce86c7SWei Liu } 163360ce86c7SWei Liu put_fid(pdu, fidp); 163460ce86c7SWei Liu out_nofid: 163560ce86c7SWei Liu pdu_complete(pdu, err); 163660ce86c7SWei Liu } 163760ce86c7SWei Liu 16388440e22eSGreg Kurz static void coroutine_fn v9fs_clunk(void *opaque) 163960ce86c7SWei Liu { 164060ce86c7SWei Liu int err; 164160ce86c7SWei Liu int32_t fid; 164260ce86c7SWei Liu size_t offset = 7; 164360ce86c7SWei Liu V9fsFidState *fidp; 164460ce86c7SWei Liu V9fsPDU *pdu = opaque; 164560ce86c7SWei Liu V9fsState *s = pdu->s; 164660ce86c7SWei Liu 164760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 164860ce86c7SWei Liu if (err < 0) { 164960ce86c7SWei Liu goto out_nofid; 165060ce86c7SWei Liu } 165160ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 165260ce86c7SWei Liu 165360ce86c7SWei Liu fidp = clunk_fid(s, fid); 165460ce86c7SWei Liu if (fidp == NULL) { 165560ce86c7SWei Liu err = -ENOENT; 165660ce86c7SWei Liu goto out_nofid; 165760ce86c7SWei Liu } 165860ce86c7SWei Liu /* 165960ce86c7SWei Liu * Bump the ref so that put_fid will 166060ce86c7SWei Liu * free the fid. 166160ce86c7SWei Liu */ 166260ce86c7SWei Liu fidp->ref++; 166360ce86c7SWei Liu err = put_fid(pdu, fidp); 166460ce86c7SWei Liu if (!err) { 166560ce86c7SWei Liu err = offset; 166660ce86c7SWei Liu } 166760ce86c7SWei Liu out_nofid: 166860ce86c7SWei Liu pdu_complete(pdu, err); 166960ce86c7SWei Liu } 167060ce86c7SWei Liu 1671bcb8998fSStefano Stabellini /* 1672bcb8998fSStefano Stabellini * Create a QEMUIOVector for a sub-region of PDU iovecs 1673bcb8998fSStefano Stabellini * 1674bcb8998fSStefano Stabellini * @qiov: uninitialized QEMUIOVector 1675bcb8998fSStefano Stabellini * @skip: number of bytes to skip from beginning of PDU 1676bcb8998fSStefano Stabellini * @size: number of bytes to include 1677bcb8998fSStefano Stabellini * @is_write: true - write, false - read 1678bcb8998fSStefano Stabellini * 1679bcb8998fSStefano Stabellini * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 1680bcb8998fSStefano Stabellini * with qemu_iovec_destroy(). 1681bcb8998fSStefano Stabellini */ 1682bcb8998fSStefano Stabellini static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 1683bcb8998fSStefano Stabellini size_t skip, size_t size, 1684bcb8998fSStefano Stabellini bool is_write) 1685bcb8998fSStefano Stabellini { 1686bcb8998fSStefano Stabellini QEMUIOVector elem; 1687bcb8998fSStefano Stabellini struct iovec *iov; 1688bcb8998fSStefano Stabellini unsigned int niov; 1689bcb8998fSStefano Stabellini 169088da0b03SStefano Stabellini if (is_write) { 16918d37de41SGreg Kurz pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov, size + skip); 169288da0b03SStefano Stabellini } else { 1693fa0eb5c5SGreg Kurz pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); 169488da0b03SStefano Stabellini } 1695bcb8998fSStefano Stabellini 1696bcb8998fSStefano Stabellini qemu_iovec_init_external(&elem, iov, niov); 1697bcb8998fSStefano Stabellini qemu_iovec_init(qiov, niov); 1698bcb8998fSStefano Stabellini qemu_iovec_concat(qiov, &elem, skip, size); 1699bcb8998fSStefano Stabellini } 1700bcb8998fSStefano Stabellini 170160ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 170260ce86c7SWei Liu uint64_t off, uint32_t max_count) 170360ce86c7SWei Liu { 170460ce86c7SWei Liu ssize_t err; 170560ce86c7SWei Liu size_t offset = 7; 17067e55d65cSLi Qiang uint64_t read_count; 1707bcb8998fSStefano Stabellini QEMUIOVector qiov_full; 170860ce86c7SWei Liu 17097e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 17107e55d65cSLi Qiang read_count = 0; 17117e55d65cSLi Qiang } else { 17127e55d65cSLi Qiang read_count = fidp->fs.xattr.len - off; 17137e55d65cSLi Qiang } 171460ce86c7SWei Liu if (read_count > max_count) { 171560ce86c7SWei Liu read_count = max_count; 171660ce86c7SWei Liu } 171760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 171860ce86c7SWei Liu if (err < 0) { 171960ce86c7SWei Liu return err; 172060ce86c7SWei Liu } 172160ce86c7SWei Liu offset += err; 172200588a0aSWei Liu 1723fa0eb5c5SGreg Kurz v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); 1724fa0eb5c5SGreg Kurz err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, 172560ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 172660ce86c7SWei Liu read_count); 1727bcb8998fSStefano Stabellini qemu_iovec_destroy(&qiov_full); 172860ce86c7SWei Liu if (err < 0) { 172960ce86c7SWei Liu return err; 173060ce86c7SWei Liu } 173160ce86c7SWei Liu offset += err; 173260ce86c7SWei Liu return offset; 173360ce86c7SWei Liu } 173460ce86c7SWei Liu 17358440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, 17368440e22eSGreg Kurz V9fsFidState *fidp, 17378440e22eSGreg Kurz uint32_t max_count) 173860ce86c7SWei Liu { 173960ce86c7SWei Liu V9fsPath path; 174060ce86c7SWei Liu V9fsStat v9stat; 174160ce86c7SWei Liu int len, err = 0; 174260ce86c7SWei Liu int32_t count = 0; 174360ce86c7SWei Liu struct stat stbuf; 174460ce86c7SWei Liu off_t saved_dir_pos; 1745635324e8SGreg Kurz struct dirent *dent; 174660ce86c7SWei Liu 174760ce86c7SWei Liu /* save the directory position */ 174860ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 174960ce86c7SWei Liu if (saved_dir_pos < 0) { 175060ce86c7SWei Liu return saved_dir_pos; 175160ce86c7SWei Liu } 175260ce86c7SWei Liu 175360ce86c7SWei Liu while (1) { 175460ce86c7SWei Liu v9fs_path_init(&path); 17557cde47d4SGreg Kurz 17567cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 17577cde47d4SGreg Kurz 1758635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1759635324e8SGreg Kurz if (err || !dent) { 176060ce86c7SWei Liu break; 176160ce86c7SWei Liu } 176260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 176360ce86c7SWei Liu if (err < 0) { 17648762a46dSGreg Kurz break; 176560ce86c7SWei Liu } 176660ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 176760ce86c7SWei Liu if (err < 0) { 17688762a46dSGreg Kurz break; 176960ce86c7SWei Liu } 17706069537fSJan Dakinevich err = stat_to_v9stat(pdu, &path, dent->d_name, &stbuf, &v9stat); 177160ce86c7SWei Liu if (err < 0) { 17728762a46dSGreg Kurz break; 177360ce86c7SWei Liu } 1774772a7369SJan Dakinevich if ((count + v9stat.size + 2) > max_count) { 17757cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 17767cde47d4SGreg Kurz 177760ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 177860ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 177960ce86c7SWei Liu v9fs_stat_free(&v9stat); 178060ce86c7SWei Liu v9fs_path_free(&path); 178160ce86c7SWei Liu return count; 178260ce86c7SWei Liu } 1783772a7369SJan Dakinevich 1784772a7369SJan Dakinevich /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 1785772a7369SJan Dakinevich len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 1786772a7369SJan Dakinevich 1787772a7369SJan Dakinevich v9fs_readdir_unlock(&fidp->fs.dir); 1788772a7369SJan Dakinevich 1789772a7369SJan Dakinevich if (len < 0) { 1790772a7369SJan Dakinevich v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 1791772a7369SJan Dakinevich v9fs_stat_free(&v9stat); 1792772a7369SJan Dakinevich v9fs_path_free(&path); 1793772a7369SJan Dakinevich return len; 1794772a7369SJan Dakinevich } 179560ce86c7SWei Liu count += len; 179660ce86c7SWei Liu v9fs_stat_free(&v9stat); 179760ce86c7SWei Liu v9fs_path_free(&path); 179860ce86c7SWei Liu saved_dir_pos = dent->d_off; 179960ce86c7SWei Liu } 18008762a46dSGreg Kurz 18017cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18027cde47d4SGreg Kurz 180360ce86c7SWei Liu v9fs_path_free(&path); 180460ce86c7SWei Liu if (err < 0) { 180560ce86c7SWei Liu return err; 180660ce86c7SWei Liu } 180760ce86c7SWei Liu return count; 180860ce86c7SWei Liu } 180960ce86c7SWei Liu 18108440e22eSGreg Kurz static void coroutine_fn v9fs_read(void *opaque) 181160ce86c7SWei Liu { 181260ce86c7SWei Liu int32_t fid; 181360ce86c7SWei Liu uint64_t off; 181460ce86c7SWei Liu ssize_t err = 0; 181560ce86c7SWei Liu int32_t count = 0; 181660ce86c7SWei Liu size_t offset = 7; 181760ce86c7SWei Liu uint32_t max_count; 181860ce86c7SWei Liu V9fsFidState *fidp; 181960ce86c7SWei Liu V9fsPDU *pdu = opaque; 182060ce86c7SWei Liu V9fsState *s = pdu->s; 182160ce86c7SWei Liu 182260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 182360ce86c7SWei Liu if (err < 0) { 182460ce86c7SWei Liu goto out_nofid; 182560ce86c7SWei Liu } 182660ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 182760ce86c7SWei Liu 182860ce86c7SWei Liu fidp = get_fid(pdu, fid); 182960ce86c7SWei Liu if (fidp == NULL) { 183060ce86c7SWei Liu err = -EINVAL; 183160ce86c7SWei Liu goto out_nofid; 183260ce86c7SWei Liu } 183360ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 183460ce86c7SWei Liu 183560ce86c7SWei Liu if (off == 0) { 183660ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 183760ce86c7SWei Liu } 183860ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 183960ce86c7SWei Liu if (count < 0) { 184060ce86c7SWei Liu err = count; 184160ce86c7SWei Liu goto out; 184260ce86c7SWei Liu } 184360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 184460ce86c7SWei Liu if (err < 0) { 184560ce86c7SWei Liu goto out; 184660ce86c7SWei Liu } 184760ce86c7SWei Liu err += offset + count; 184860ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 184960ce86c7SWei Liu QEMUIOVector qiov_full; 185060ce86c7SWei Liu QEMUIOVector qiov; 185160ce86c7SWei Liu int32_t len; 185260ce86c7SWei Liu 185360ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 185460ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 185560ce86c7SWei Liu do { 185660ce86c7SWei Liu qemu_iovec_reset(&qiov); 185760ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 185860ce86c7SWei Liu if (0) { 185960ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 186060ce86c7SWei Liu } 186160ce86c7SWei Liu /* Loop in case of EINTR */ 186260ce86c7SWei Liu do { 186360ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 186460ce86c7SWei Liu if (len >= 0) { 186560ce86c7SWei Liu off += len; 186660ce86c7SWei Liu count += len; 186760ce86c7SWei Liu } 186860ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 186960ce86c7SWei Liu if (len < 0) { 187060ce86c7SWei Liu /* IO error return the error */ 187160ce86c7SWei Liu err = len; 1872e95c9a49SLi Qiang goto out_free_iovec; 187360ce86c7SWei Liu } 187460ce86c7SWei Liu } while (count < max_count && len > 0); 187560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 187660ce86c7SWei Liu if (err < 0) { 1877e95c9a49SLi Qiang goto out_free_iovec; 187860ce86c7SWei Liu } 187960ce86c7SWei Liu err += offset + count; 1880e95c9a49SLi Qiang out_free_iovec: 188160ce86c7SWei Liu qemu_iovec_destroy(&qiov); 188260ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 188360ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 188460ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 188560ce86c7SWei Liu } else { 188660ce86c7SWei Liu err = -EINVAL; 188760ce86c7SWei Liu } 188860ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 188960ce86c7SWei Liu out: 189060ce86c7SWei Liu put_fid(pdu, fidp); 189160ce86c7SWei Liu out_nofid: 189260ce86c7SWei Liu pdu_complete(pdu, err); 189360ce86c7SWei Liu } 189460ce86c7SWei Liu 189560ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 189660ce86c7SWei Liu { 189760ce86c7SWei Liu /* 189860ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 189960ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 190060ce86c7SWei Liu */ 190160ce86c7SWei Liu return 24 + v9fs_string_size(name); 190260ce86c7SWei Liu } 190360ce86c7SWei Liu 19048440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, 19058440e22eSGreg Kurz int32_t max_count) 190660ce86c7SWei Liu { 190760ce86c7SWei Liu size_t size; 190860ce86c7SWei Liu V9fsQID qid; 190960ce86c7SWei Liu V9fsString name; 191060ce86c7SWei Liu int len, err = 0; 191160ce86c7SWei Liu int32_t count = 0; 191260ce86c7SWei Liu off_t saved_dir_pos; 1913635324e8SGreg Kurz struct dirent *dent; 191460ce86c7SWei Liu 191560ce86c7SWei Liu /* save the directory position */ 191660ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 191760ce86c7SWei Liu if (saved_dir_pos < 0) { 191860ce86c7SWei Liu return saved_dir_pos; 191960ce86c7SWei Liu } 192060ce86c7SWei Liu 192160ce86c7SWei Liu while (1) { 19227cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 19237cde47d4SGreg Kurz 1924635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1925635324e8SGreg Kurz if (err || !dent) { 192660ce86c7SWei Liu break; 192760ce86c7SWei Liu } 192860ce86c7SWei Liu v9fs_string_init(&name); 192960ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 193060ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 19317cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19327cde47d4SGreg Kurz 193360ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 193460ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 193560ce86c7SWei Liu v9fs_string_free(&name); 193660ce86c7SWei Liu return count; 193760ce86c7SWei Liu } 193860ce86c7SWei Liu /* 193960ce86c7SWei Liu * Fill up just the path field of qid because the client uses 194060ce86c7SWei Liu * only that. To fill the entire qid structure we will have 194160ce86c7SWei Liu * to stat each dirent found, which is expensive 194260ce86c7SWei Liu */ 194360ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 194460ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 194560ce86c7SWei Liu /* Fill the other fields with dummy values */ 194660ce86c7SWei Liu qid.type = 0; 194760ce86c7SWei Liu qid.version = 0; 194860ce86c7SWei Liu 194960ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 195060ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 195160ce86c7SWei Liu &qid, dent->d_off, 195260ce86c7SWei Liu dent->d_type, &name); 19537cde47d4SGreg Kurz 19547cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19557cde47d4SGreg Kurz 195660ce86c7SWei Liu if (len < 0) { 195760ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 195860ce86c7SWei Liu v9fs_string_free(&name); 195960ce86c7SWei Liu return len; 196060ce86c7SWei Liu } 196160ce86c7SWei Liu count += len; 196260ce86c7SWei Liu v9fs_string_free(&name); 196360ce86c7SWei Liu saved_dir_pos = dent->d_off; 196460ce86c7SWei Liu } 19657cde47d4SGreg Kurz 19667cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19677cde47d4SGreg Kurz 196860ce86c7SWei Liu if (err < 0) { 196960ce86c7SWei Liu return err; 197060ce86c7SWei Liu } 197160ce86c7SWei Liu return count; 197260ce86c7SWei Liu } 197360ce86c7SWei Liu 19748440e22eSGreg Kurz static void coroutine_fn v9fs_readdir(void *opaque) 197560ce86c7SWei Liu { 197660ce86c7SWei Liu int32_t fid; 197760ce86c7SWei Liu V9fsFidState *fidp; 197860ce86c7SWei Liu ssize_t retval = 0; 197960ce86c7SWei Liu size_t offset = 7; 198060ce86c7SWei Liu uint64_t initial_offset; 198160ce86c7SWei Liu int32_t count; 198260ce86c7SWei Liu uint32_t max_count; 198360ce86c7SWei Liu V9fsPDU *pdu = opaque; 198460ce86c7SWei Liu 198560ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 198660ce86c7SWei Liu &initial_offset, &max_count); 198760ce86c7SWei Liu if (retval < 0) { 198860ce86c7SWei Liu goto out_nofid; 198960ce86c7SWei Liu } 199060ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 199160ce86c7SWei Liu 199260ce86c7SWei Liu fidp = get_fid(pdu, fid); 199360ce86c7SWei Liu if (fidp == NULL) { 199460ce86c7SWei Liu retval = -EINVAL; 199560ce86c7SWei Liu goto out_nofid; 199660ce86c7SWei Liu } 1997f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 199860ce86c7SWei Liu retval = -EINVAL; 199960ce86c7SWei Liu goto out; 200060ce86c7SWei Liu } 200160ce86c7SWei Liu if (initial_offset == 0) { 200260ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 200360ce86c7SWei Liu } else { 200460ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 200560ce86c7SWei Liu } 200660ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 200760ce86c7SWei Liu if (count < 0) { 200860ce86c7SWei Liu retval = count; 200960ce86c7SWei Liu goto out; 201060ce86c7SWei Liu } 201160ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 201260ce86c7SWei Liu if (retval < 0) { 201360ce86c7SWei Liu goto out; 201460ce86c7SWei Liu } 201560ce86c7SWei Liu retval += count + offset; 201660ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 201760ce86c7SWei Liu out: 201860ce86c7SWei Liu put_fid(pdu, fidp); 201960ce86c7SWei Liu out_nofid: 202060ce86c7SWei Liu pdu_complete(pdu, retval); 202160ce86c7SWei Liu } 202260ce86c7SWei Liu 202360ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 202460ce86c7SWei Liu uint64_t off, uint32_t count, 202560ce86c7SWei Liu struct iovec *sg, int cnt) 202660ce86c7SWei Liu { 202760ce86c7SWei Liu int i, to_copy; 202860ce86c7SWei Liu ssize_t err = 0; 20297e55d65cSLi Qiang uint64_t write_count; 203060ce86c7SWei Liu size_t offset = 7; 203160ce86c7SWei Liu 203260ce86c7SWei Liu 20337e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 203460ce86c7SWei Liu err = -ENOSPC; 203560ce86c7SWei Liu goto out; 203660ce86c7SWei Liu } 20377e55d65cSLi Qiang write_count = fidp->fs.xattr.len - off; 20387e55d65cSLi Qiang if (write_count > count) { 20397e55d65cSLi Qiang write_count = count; 20407e55d65cSLi Qiang } 204160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 204260ce86c7SWei Liu if (err < 0) { 204360ce86c7SWei Liu return err; 204460ce86c7SWei Liu } 204560ce86c7SWei Liu err += offset; 204660ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 204760ce86c7SWei Liu /* 204860ce86c7SWei Liu * Now copy the content from sg list 204960ce86c7SWei Liu */ 205060ce86c7SWei Liu for (i = 0; i < cnt; i++) { 205160ce86c7SWei Liu if (write_count > sg[i].iov_len) { 205260ce86c7SWei Liu to_copy = sg[i].iov_len; 205360ce86c7SWei Liu } else { 205460ce86c7SWei Liu to_copy = write_count; 205560ce86c7SWei Liu } 205660ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 205760ce86c7SWei Liu /* updating vs->off since we are not using below */ 205860ce86c7SWei Liu off += to_copy; 205960ce86c7SWei Liu write_count -= to_copy; 206060ce86c7SWei Liu } 206160ce86c7SWei Liu out: 206260ce86c7SWei Liu return err; 206360ce86c7SWei Liu } 206460ce86c7SWei Liu 20658440e22eSGreg Kurz static void coroutine_fn v9fs_write(void *opaque) 206660ce86c7SWei Liu { 206760ce86c7SWei Liu ssize_t err; 206860ce86c7SWei Liu int32_t fid; 206960ce86c7SWei Liu uint64_t off; 207060ce86c7SWei Liu uint32_t count; 207160ce86c7SWei Liu int32_t len = 0; 207260ce86c7SWei Liu int32_t total = 0; 207360ce86c7SWei Liu size_t offset = 7; 207460ce86c7SWei Liu V9fsFidState *fidp; 207560ce86c7SWei Liu V9fsPDU *pdu = opaque; 207660ce86c7SWei Liu V9fsState *s = pdu->s; 207760ce86c7SWei Liu QEMUIOVector qiov_full; 207860ce86c7SWei Liu QEMUIOVector qiov; 207960ce86c7SWei Liu 208060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 208160ce86c7SWei Liu if (err < 0) { 208260ce86c7SWei Liu pdu_complete(pdu, err); 208360ce86c7SWei Liu return; 208460ce86c7SWei Liu } 208560ce86c7SWei Liu offset += err; 208660ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 208760ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 208860ce86c7SWei Liu 208960ce86c7SWei Liu fidp = get_fid(pdu, fid); 209060ce86c7SWei Liu if (fidp == NULL) { 209160ce86c7SWei Liu err = -EINVAL; 209260ce86c7SWei Liu goto out_nofid; 209360ce86c7SWei Liu } 209460ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 209560ce86c7SWei Liu if (fidp->fs.fd == -1) { 209660ce86c7SWei Liu err = -EINVAL; 209760ce86c7SWei Liu goto out; 209860ce86c7SWei Liu } 209960ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 210060ce86c7SWei Liu /* 210160ce86c7SWei Liu * setxattr operation 210260ce86c7SWei Liu */ 210360ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 210460ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 210560ce86c7SWei Liu goto out; 210660ce86c7SWei Liu } else { 210760ce86c7SWei Liu err = -EINVAL; 210860ce86c7SWei Liu goto out; 210960ce86c7SWei Liu } 211060ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 211160ce86c7SWei Liu do { 211260ce86c7SWei Liu qemu_iovec_reset(&qiov); 211360ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 211460ce86c7SWei Liu if (0) { 211560ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 211660ce86c7SWei Liu } 211760ce86c7SWei Liu /* Loop in case of EINTR */ 211860ce86c7SWei Liu do { 211960ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 212060ce86c7SWei Liu if (len >= 0) { 212160ce86c7SWei Liu off += len; 212260ce86c7SWei Liu total += len; 212360ce86c7SWei Liu } 212460ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 212560ce86c7SWei Liu if (len < 0) { 212660ce86c7SWei Liu /* IO error return the error */ 212760ce86c7SWei Liu err = len; 212860ce86c7SWei Liu goto out_qiov; 212960ce86c7SWei Liu } 213060ce86c7SWei Liu } while (total < count && len > 0); 213160ce86c7SWei Liu 213260ce86c7SWei Liu offset = 7; 213360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 213460ce86c7SWei Liu if (err < 0) { 2135fdfcc9aeSLi Qiang goto out_qiov; 213660ce86c7SWei Liu } 213760ce86c7SWei Liu err += offset; 213860ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 213960ce86c7SWei Liu out_qiov: 214060ce86c7SWei Liu qemu_iovec_destroy(&qiov); 214160ce86c7SWei Liu out: 214260ce86c7SWei Liu put_fid(pdu, fidp); 214360ce86c7SWei Liu out_nofid: 214460ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 214560ce86c7SWei Liu pdu_complete(pdu, err); 214660ce86c7SWei Liu } 214760ce86c7SWei Liu 21488440e22eSGreg Kurz static void coroutine_fn v9fs_create(void *opaque) 214960ce86c7SWei Liu { 215060ce86c7SWei Liu int32_t fid; 215160ce86c7SWei Liu int err = 0; 215260ce86c7SWei Liu size_t offset = 7; 215360ce86c7SWei Liu V9fsFidState *fidp; 215460ce86c7SWei Liu V9fsQID qid; 215560ce86c7SWei Liu int32_t perm; 215660ce86c7SWei Liu int8_t mode; 215760ce86c7SWei Liu V9fsPath path; 215860ce86c7SWei Liu struct stat stbuf; 215960ce86c7SWei Liu V9fsString name; 216060ce86c7SWei Liu V9fsString extension; 216160ce86c7SWei Liu int iounit; 216260ce86c7SWei Liu V9fsPDU *pdu = opaque; 216360ce86c7SWei Liu 216460ce86c7SWei Liu v9fs_path_init(&path); 216560ce86c7SWei Liu v9fs_string_init(&name); 216660ce86c7SWei Liu v9fs_string_init(&extension); 216760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 216860ce86c7SWei Liu &perm, &mode, &extension); 216960ce86c7SWei Liu if (err < 0) { 217060ce86c7SWei Liu goto out_nofid; 217160ce86c7SWei Liu } 217260ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 217360ce86c7SWei Liu 2174fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2175fff39a7aSGreg Kurz err = -ENOENT; 2176fff39a7aSGreg Kurz goto out_nofid; 2177fff39a7aSGreg Kurz } 2178fff39a7aSGreg Kurz 2179805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2180805b5d98SGreg Kurz err = -EEXIST; 2181805b5d98SGreg Kurz goto out_nofid; 2182805b5d98SGreg Kurz } 2183805b5d98SGreg Kurz 218460ce86c7SWei Liu fidp = get_fid(pdu, fid); 218560ce86c7SWei Liu if (fidp == NULL) { 218660ce86c7SWei Liu err = -EINVAL; 218760ce86c7SWei Liu goto out_nofid; 218860ce86c7SWei Liu } 2189d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 2190d63fb193SLi Qiang err = -EINVAL; 2191d63fb193SLi Qiang goto out; 2192d63fb193SLi Qiang } 219360ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 219460ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 219560ce86c7SWei Liu fidp->uid, -1, &stbuf); 219660ce86c7SWei Liu if (err < 0) { 219760ce86c7SWei Liu goto out; 219860ce86c7SWei Liu } 219960ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 220060ce86c7SWei Liu if (err < 0) { 220160ce86c7SWei Liu goto out; 220260ce86c7SWei Liu } 220360ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 220460ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 220560ce86c7SWei Liu if (err < 0) { 220660ce86c7SWei Liu goto out; 220760ce86c7SWei Liu } 220860ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 220960ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 221060ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 221160ce86c7SWei Liu extension.data, -1 , &stbuf); 221260ce86c7SWei Liu if (err < 0) { 221360ce86c7SWei Liu goto out; 221460ce86c7SWei Liu } 221560ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 221660ce86c7SWei Liu if (err < 0) { 221760ce86c7SWei Liu goto out; 221860ce86c7SWei Liu } 221960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 222060ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 222160ce86c7SWei Liu int32_t ofid = atoi(extension.data); 222260ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 222360ce86c7SWei Liu if (ofidp == NULL) { 222460ce86c7SWei Liu err = -EINVAL; 222560ce86c7SWei Liu goto out; 222660ce86c7SWei Liu } 222760ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 222860ce86c7SWei Liu put_fid(pdu, ofidp); 222960ce86c7SWei Liu if (err < 0) { 223060ce86c7SWei Liu goto out; 223160ce86c7SWei Liu } 223260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 223360ce86c7SWei Liu if (err < 0) { 223460ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 223560ce86c7SWei Liu goto out; 223660ce86c7SWei Liu } 223760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 223860ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 223960ce86c7SWei Liu if (err < 0) { 224060ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 224160ce86c7SWei Liu goto out; 224260ce86c7SWei Liu } 224360ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 224460ce86c7SWei Liu char ctype; 224560ce86c7SWei Liu uint32_t major, minor; 224660ce86c7SWei Liu mode_t nmode = 0; 224760ce86c7SWei Liu 224860ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 224960ce86c7SWei Liu err = -errno; 225060ce86c7SWei Liu goto out; 225160ce86c7SWei Liu } 225260ce86c7SWei Liu 225360ce86c7SWei Liu switch (ctype) { 225460ce86c7SWei Liu case 'c': 225560ce86c7SWei Liu nmode = S_IFCHR; 225660ce86c7SWei Liu break; 225760ce86c7SWei Liu case 'b': 225860ce86c7SWei Liu nmode = S_IFBLK; 225960ce86c7SWei Liu break; 226060ce86c7SWei Liu default: 226160ce86c7SWei Liu err = -EIO; 226260ce86c7SWei Liu goto out; 226360ce86c7SWei Liu } 226460ce86c7SWei Liu 226560ce86c7SWei Liu nmode |= perm & 0777; 226660ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 226760ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 226860ce86c7SWei Liu if (err < 0) { 226960ce86c7SWei Liu goto out; 227060ce86c7SWei Liu } 227160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 227260ce86c7SWei Liu if (err < 0) { 227360ce86c7SWei Liu goto out; 227460ce86c7SWei Liu } 227560ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 227660ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 227760ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 227860ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 227960ce86c7SWei Liu if (err < 0) { 228060ce86c7SWei Liu goto out; 228160ce86c7SWei Liu } 228260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 228360ce86c7SWei Liu if (err < 0) { 228460ce86c7SWei Liu goto out; 228560ce86c7SWei Liu } 228660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 228760ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 228860ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 228960ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 229060ce86c7SWei Liu if (err < 0) { 229160ce86c7SWei Liu goto out; 229260ce86c7SWei Liu } 229360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 229460ce86c7SWei Liu if (err < 0) { 229560ce86c7SWei Liu goto out; 229660ce86c7SWei Liu } 229760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 229860ce86c7SWei Liu } else { 229960ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 230060ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 230160ce86c7SWei Liu if (err < 0) { 230260ce86c7SWei Liu goto out; 230360ce86c7SWei Liu } 230460ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 230560ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 230660ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 230760ce86c7SWei Liu /* 230860ce86c7SWei Liu * We let the host file system do O_EXCL check 230960ce86c7SWei Liu * We should not reclaim such fd 231060ce86c7SWei Liu */ 231160ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 231260ce86c7SWei Liu } 231360ce86c7SWei Liu } 231460ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 231560ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 231660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 231760ce86c7SWei Liu if (err < 0) { 231860ce86c7SWei Liu goto out; 231960ce86c7SWei Liu } 232060ce86c7SWei Liu err += offset; 232160ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 232260ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 232360ce86c7SWei Liu out: 232460ce86c7SWei Liu put_fid(pdu, fidp); 232560ce86c7SWei Liu out_nofid: 232660ce86c7SWei Liu pdu_complete(pdu, err); 232760ce86c7SWei Liu v9fs_string_free(&name); 232860ce86c7SWei Liu v9fs_string_free(&extension); 232960ce86c7SWei Liu v9fs_path_free(&path); 233060ce86c7SWei Liu } 233160ce86c7SWei Liu 23328440e22eSGreg Kurz static void coroutine_fn v9fs_symlink(void *opaque) 233360ce86c7SWei Liu { 233460ce86c7SWei Liu V9fsPDU *pdu = opaque; 233560ce86c7SWei Liu V9fsString name; 233660ce86c7SWei Liu V9fsString symname; 233760ce86c7SWei Liu V9fsFidState *dfidp; 233860ce86c7SWei Liu V9fsQID qid; 233960ce86c7SWei Liu struct stat stbuf; 234060ce86c7SWei Liu int32_t dfid; 234160ce86c7SWei Liu int err = 0; 234260ce86c7SWei Liu gid_t gid; 234360ce86c7SWei Liu size_t offset = 7; 234460ce86c7SWei Liu 234560ce86c7SWei Liu v9fs_string_init(&name); 234660ce86c7SWei Liu v9fs_string_init(&symname); 234760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 234860ce86c7SWei Liu if (err < 0) { 234960ce86c7SWei Liu goto out_nofid; 235060ce86c7SWei Liu } 235160ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 235260ce86c7SWei Liu 2353fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2354fff39a7aSGreg Kurz err = -ENOENT; 2355fff39a7aSGreg Kurz goto out_nofid; 2356fff39a7aSGreg Kurz } 2357fff39a7aSGreg Kurz 2358805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2359805b5d98SGreg Kurz err = -EEXIST; 2360805b5d98SGreg Kurz goto out_nofid; 2361805b5d98SGreg Kurz } 2362805b5d98SGreg Kurz 236360ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 236460ce86c7SWei Liu if (dfidp == NULL) { 236560ce86c7SWei Liu err = -EINVAL; 236660ce86c7SWei Liu goto out_nofid; 236760ce86c7SWei Liu } 236860ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 236960ce86c7SWei Liu if (err < 0) { 237060ce86c7SWei Liu goto out; 237160ce86c7SWei Liu } 237260ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 237360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 237460ce86c7SWei Liu if (err < 0) { 237560ce86c7SWei Liu goto out; 237660ce86c7SWei Liu } 237760ce86c7SWei Liu err += offset; 237860ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 237960ce86c7SWei Liu qid.type, qid.version, qid.path); 238060ce86c7SWei Liu out: 238160ce86c7SWei Liu put_fid(pdu, dfidp); 238260ce86c7SWei Liu out_nofid: 238360ce86c7SWei Liu pdu_complete(pdu, err); 238460ce86c7SWei Liu v9fs_string_free(&name); 238560ce86c7SWei Liu v9fs_string_free(&symname); 238660ce86c7SWei Liu } 238760ce86c7SWei Liu 2388a1bf8b74SGreg Kurz static void coroutine_fn v9fs_flush(void *opaque) 238960ce86c7SWei Liu { 239060ce86c7SWei Liu ssize_t err; 239160ce86c7SWei Liu int16_t tag; 239260ce86c7SWei Liu size_t offset = 7; 2393d5f2af7bSGreg Kurz V9fsPDU *cancel_pdu = NULL; 239460ce86c7SWei Liu V9fsPDU *pdu = opaque; 239560ce86c7SWei Liu V9fsState *s = pdu->s; 239660ce86c7SWei Liu 239760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 239860ce86c7SWei Liu if (err < 0) { 239960ce86c7SWei Liu pdu_complete(pdu, err); 240060ce86c7SWei Liu return; 240160ce86c7SWei Liu } 240260ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 240360ce86c7SWei Liu 2404d5f2af7bSGreg Kurz if (pdu->tag == tag) { 24053dc6f869SAlistair Francis warn_report("the guest sent a self-referencing 9P flush request"); 2406d5f2af7bSGreg Kurz } else { 240760ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 240860ce86c7SWei Liu if (cancel_pdu->tag == tag) { 240960ce86c7SWei Liu break; 241060ce86c7SWei Liu } 241160ce86c7SWei Liu } 2412d5f2af7bSGreg Kurz } 241360ce86c7SWei Liu if (cancel_pdu) { 241460ce86c7SWei Liu cancel_pdu->cancelled = 1; 241560ce86c7SWei Liu /* 241660ce86c7SWei Liu * Wait for pdu to complete. 241760ce86c7SWei Liu */ 24181ace7ceaSPaolo Bonzini qemu_co_queue_wait(&cancel_pdu->complete, NULL); 241918adde86SGreg Kurz if (!qemu_co_queue_next(&cancel_pdu->complete)) { 242060ce86c7SWei Liu cancel_pdu->cancelled = 0; 242160ce86c7SWei Liu pdu_free(cancel_pdu); 242260ce86c7SWei Liu } 242318adde86SGreg Kurz } 242460ce86c7SWei Liu pdu_complete(pdu, 7); 242560ce86c7SWei Liu } 242660ce86c7SWei Liu 24278440e22eSGreg Kurz static void coroutine_fn v9fs_link(void *opaque) 242860ce86c7SWei Liu { 242960ce86c7SWei Liu V9fsPDU *pdu = opaque; 243060ce86c7SWei Liu int32_t dfid, oldfid; 243160ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 243260ce86c7SWei Liu V9fsString name; 243360ce86c7SWei Liu size_t offset = 7; 243460ce86c7SWei Liu int err = 0; 243560ce86c7SWei Liu 243660ce86c7SWei Liu v9fs_string_init(&name); 243760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 243860ce86c7SWei Liu if (err < 0) { 243960ce86c7SWei Liu goto out_nofid; 244060ce86c7SWei Liu } 244160ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 244260ce86c7SWei Liu 2443fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2444fff39a7aSGreg Kurz err = -ENOENT; 2445fff39a7aSGreg Kurz goto out_nofid; 2446fff39a7aSGreg Kurz } 2447fff39a7aSGreg Kurz 2448805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2449805b5d98SGreg Kurz err = -EEXIST; 2450805b5d98SGreg Kurz goto out_nofid; 2451805b5d98SGreg Kurz } 2452805b5d98SGreg Kurz 245360ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 245460ce86c7SWei Liu if (dfidp == NULL) { 245560ce86c7SWei Liu err = -ENOENT; 245660ce86c7SWei Liu goto out_nofid; 245760ce86c7SWei Liu } 245860ce86c7SWei Liu 245960ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 246060ce86c7SWei Liu if (oldfidp == NULL) { 246160ce86c7SWei Liu err = -ENOENT; 246260ce86c7SWei Liu goto out; 246360ce86c7SWei Liu } 246460ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 246560ce86c7SWei Liu if (!err) { 246660ce86c7SWei Liu err = offset; 246760ce86c7SWei Liu } 24684c158678SLi Qiang put_fid(pdu, oldfidp); 246960ce86c7SWei Liu out: 247060ce86c7SWei Liu put_fid(pdu, dfidp); 247160ce86c7SWei Liu out_nofid: 247260ce86c7SWei Liu v9fs_string_free(&name); 247360ce86c7SWei Liu pdu_complete(pdu, err); 247460ce86c7SWei Liu } 247560ce86c7SWei Liu 247660ce86c7SWei Liu /* Only works with path name based fid */ 24778440e22eSGreg Kurz static void coroutine_fn v9fs_remove(void *opaque) 247860ce86c7SWei Liu { 247960ce86c7SWei Liu int32_t fid; 248060ce86c7SWei Liu int err = 0; 248160ce86c7SWei Liu size_t offset = 7; 248260ce86c7SWei Liu V9fsFidState *fidp; 248360ce86c7SWei Liu V9fsPDU *pdu = opaque; 248460ce86c7SWei Liu 248560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 248660ce86c7SWei Liu if (err < 0) { 248760ce86c7SWei Liu goto out_nofid; 248860ce86c7SWei Liu } 248960ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 249060ce86c7SWei Liu 249160ce86c7SWei Liu fidp = get_fid(pdu, fid); 249260ce86c7SWei Liu if (fidp == NULL) { 249360ce86c7SWei Liu err = -EINVAL; 249460ce86c7SWei Liu goto out_nofid; 249560ce86c7SWei Liu } 249660ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 249760ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 249860ce86c7SWei Liu err = -EOPNOTSUPP; 249960ce86c7SWei Liu goto out_err; 250060ce86c7SWei Liu } 250160ce86c7SWei Liu /* 250260ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 250360ce86c7SWei Liu * the file later. So don't reclaim fd 250460ce86c7SWei Liu */ 250560ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 250660ce86c7SWei Liu if (err < 0) { 250760ce86c7SWei Liu goto out_err; 250860ce86c7SWei Liu } 250960ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 251060ce86c7SWei Liu if (!err) { 251160ce86c7SWei Liu err = offset; 251260ce86c7SWei Liu } 251360ce86c7SWei Liu out_err: 251460ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 251560ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 251660ce86c7SWei Liu put_fid(pdu, fidp); 251760ce86c7SWei Liu out_nofid: 251860ce86c7SWei Liu pdu_complete(pdu, err); 251960ce86c7SWei Liu } 252060ce86c7SWei Liu 25218440e22eSGreg Kurz static void coroutine_fn v9fs_unlinkat(void *opaque) 252260ce86c7SWei Liu { 252360ce86c7SWei Liu int err = 0; 252460ce86c7SWei Liu V9fsString name; 252560ce86c7SWei Liu int32_t dfid, flags; 252660ce86c7SWei Liu size_t offset = 7; 252760ce86c7SWei Liu V9fsPath path; 252860ce86c7SWei Liu V9fsFidState *dfidp; 252960ce86c7SWei Liu V9fsPDU *pdu = opaque; 253060ce86c7SWei Liu 253160ce86c7SWei Liu v9fs_string_init(&name); 253260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 253360ce86c7SWei Liu if (err < 0) { 253460ce86c7SWei Liu goto out_nofid; 253560ce86c7SWei Liu } 2536fff39a7aSGreg Kurz 2537fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2538fff39a7aSGreg Kurz err = -ENOENT; 2539fff39a7aSGreg Kurz goto out_nofid; 2540fff39a7aSGreg Kurz } 2541fff39a7aSGreg Kurz 2542805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2543805b5d98SGreg Kurz err = -EINVAL; 2544805b5d98SGreg Kurz goto out_nofid; 2545805b5d98SGreg Kurz } 2546805b5d98SGreg Kurz 2547805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2548805b5d98SGreg Kurz err = -ENOTEMPTY; 2549805b5d98SGreg Kurz goto out_nofid; 2550805b5d98SGreg Kurz } 2551805b5d98SGreg Kurz 255260ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 255360ce86c7SWei Liu if (dfidp == NULL) { 255460ce86c7SWei Liu err = -EINVAL; 255560ce86c7SWei Liu goto out_nofid; 255660ce86c7SWei Liu } 255760ce86c7SWei Liu /* 255860ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 255960ce86c7SWei Liu * the file later. So don't reclaim fd 256060ce86c7SWei Liu */ 256160ce86c7SWei Liu v9fs_path_init(&path); 256260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 256360ce86c7SWei Liu if (err < 0) { 256460ce86c7SWei Liu goto out_err; 256560ce86c7SWei Liu } 256660ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 256760ce86c7SWei Liu if (err < 0) { 256860ce86c7SWei Liu goto out_err; 256960ce86c7SWei Liu } 257060ce86c7SWei Liu err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); 257160ce86c7SWei Liu if (!err) { 257260ce86c7SWei Liu err = offset; 257360ce86c7SWei Liu } 257460ce86c7SWei Liu out_err: 257560ce86c7SWei Liu put_fid(pdu, dfidp); 257660ce86c7SWei Liu v9fs_path_free(&path); 257760ce86c7SWei Liu out_nofid: 257860ce86c7SWei Liu pdu_complete(pdu, err); 257960ce86c7SWei Liu v9fs_string_free(&name); 258060ce86c7SWei Liu } 258160ce86c7SWei Liu 258260ce86c7SWei Liu 258360ce86c7SWei Liu /* Only works with path name based fid */ 25848440e22eSGreg Kurz static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 25858440e22eSGreg Kurz int32_t newdirfid, 25868440e22eSGreg Kurz V9fsString *name) 258760ce86c7SWei Liu { 258860ce86c7SWei Liu int err = 0; 258960ce86c7SWei Liu V9fsPath new_path; 259060ce86c7SWei Liu V9fsFidState *tfidp; 259160ce86c7SWei Liu V9fsState *s = pdu->s; 259260ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 259360ce86c7SWei Liu 259460ce86c7SWei Liu v9fs_path_init(&new_path); 259560ce86c7SWei Liu if (newdirfid != -1) { 259660ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 259760ce86c7SWei Liu if (dirfidp == NULL) { 259860ce86c7SWei Liu err = -ENOENT; 259960ce86c7SWei Liu goto out_nofid; 260060ce86c7SWei Liu } 260149dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 260249dd946bSGreg Kurz err = -EINVAL; 260349dd946bSGreg Kurz goto out; 260449dd946bSGreg Kurz } 26054fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 26064fa62005SGreg Kurz if (err < 0) { 26074fa62005SGreg Kurz goto out; 26084fa62005SGreg Kurz } 260960ce86c7SWei Liu } else { 26104d8bc733SJan Dakinevich char *dir_name = g_path_get_dirname(fidp->path.data); 26114d8bc733SJan Dakinevich V9fsPath dir_path; 26124d8bc733SJan Dakinevich 26134d8bc733SJan Dakinevich v9fs_path_init(&dir_path); 26144d8bc733SJan Dakinevich v9fs_path_sprintf(&dir_path, "%s", dir_name); 26154d8bc733SJan Dakinevich g_free(dir_name); 26164d8bc733SJan Dakinevich 26174d8bc733SJan Dakinevich err = v9fs_co_name_to_path(pdu, &dir_path, name->data, &new_path); 26184d8bc733SJan Dakinevich v9fs_path_free(&dir_path); 26194fa62005SGreg Kurz if (err < 0) { 26204fa62005SGreg Kurz goto out; 26214fa62005SGreg Kurz } 262260ce86c7SWei Liu } 262360ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 262460ce86c7SWei Liu if (err < 0) { 262560ce86c7SWei Liu goto out; 262660ce86c7SWei Liu } 262760ce86c7SWei Liu /* 262860ce86c7SWei Liu * Fixup fid's pointing to the old name to 262960ce86c7SWei Liu * start pointing to the new name 263060ce86c7SWei Liu */ 263160ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 263260ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 263360ce86c7SWei Liu /* replace the name */ 263460ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 263560ce86c7SWei Liu } 263660ce86c7SWei Liu } 263760ce86c7SWei Liu out: 263860ce86c7SWei Liu if (dirfidp) { 263960ce86c7SWei Liu put_fid(pdu, dirfidp); 264060ce86c7SWei Liu } 264160ce86c7SWei Liu v9fs_path_free(&new_path); 264260ce86c7SWei Liu out_nofid: 264360ce86c7SWei Liu return err; 264460ce86c7SWei Liu } 264560ce86c7SWei Liu 264660ce86c7SWei Liu /* Only works with path name based fid */ 26478440e22eSGreg Kurz static void coroutine_fn v9fs_rename(void *opaque) 264860ce86c7SWei Liu { 264960ce86c7SWei Liu int32_t fid; 265060ce86c7SWei Liu ssize_t err = 0; 265160ce86c7SWei Liu size_t offset = 7; 265260ce86c7SWei Liu V9fsString name; 265360ce86c7SWei Liu int32_t newdirfid; 265460ce86c7SWei Liu V9fsFidState *fidp; 265560ce86c7SWei Liu V9fsPDU *pdu = opaque; 265660ce86c7SWei Liu V9fsState *s = pdu->s; 265760ce86c7SWei Liu 265860ce86c7SWei Liu v9fs_string_init(&name); 265960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 266060ce86c7SWei Liu if (err < 0) { 266160ce86c7SWei Liu goto out_nofid; 266260ce86c7SWei Liu } 2663fff39a7aSGreg Kurz 2664fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2665fff39a7aSGreg Kurz err = -ENOENT; 2666fff39a7aSGreg Kurz goto out_nofid; 2667fff39a7aSGreg Kurz } 2668fff39a7aSGreg Kurz 2669805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2670805b5d98SGreg Kurz err = -EISDIR; 2671805b5d98SGreg Kurz goto out_nofid; 2672805b5d98SGreg Kurz } 2673805b5d98SGreg Kurz 267460ce86c7SWei Liu fidp = get_fid(pdu, fid); 267560ce86c7SWei Liu if (fidp == NULL) { 267660ce86c7SWei Liu err = -ENOENT; 267760ce86c7SWei Liu goto out_nofid; 267860ce86c7SWei Liu } 267949dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 268049dd946bSGreg Kurz err = -EINVAL; 268149dd946bSGreg Kurz goto out; 268249dd946bSGreg Kurz } 268360ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 268460ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 268560ce86c7SWei Liu err = -EOPNOTSUPP; 268660ce86c7SWei Liu goto out; 268760ce86c7SWei Liu } 268860ce86c7SWei Liu v9fs_path_write_lock(s); 268960ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 269060ce86c7SWei Liu v9fs_path_unlock(s); 269160ce86c7SWei Liu if (!err) { 269260ce86c7SWei Liu err = offset; 269360ce86c7SWei Liu } 269460ce86c7SWei Liu out: 269560ce86c7SWei Liu put_fid(pdu, fidp); 269660ce86c7SWei Liu out_nofid: 269760ce86c7SWei Liu pdu_complete(pdu, err); 269860ce86c7SWei Liu v9fs_string_free(&name); 269960ce86c7SWei Liu } 270060ce86c7SWei Liu 27014fa62005SGreg Kurz static int coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 27028440e22eSGreg Kurz V9fsString *old_name, 27038440e22eSGreg Kurz V9fsPath *newdir, 270460ce86c7SWei Liu V9fsString *new_name) 270560ce86c7SWei Liu { 270660ce86c7SWei Liu V9fsFidState *tfidp; 270760ce86c7SWei Liu V9fsPath oldpath, newpath; 270860ce86c7SWei Liu V9fsState *s = pdu->s; 27094fa62005SGreg Kurz int err; 271060ce86c7SWei Liu 271160ce86c7SWei Liu v9fs_path_init(&oldpath); 271260ce86c7SWei Liu v9fs_path_init(&newpath); 27134fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 27144fa62005SGreg Kurz if (err < 0) { 27154fa62005SGreg Kurz goto out; 27164fa62005SGreg Kurz } 27174fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 27184fa62005SGreg Kurz if (err < 0) { 27194fa62005SGreg Kurz goto out; 27204fa62005SGreg Kurz } 272160ce86c7SWei Liu 272260ce86c7SWei Liu /* 272360ce86c7SWei Liu * Fixup fid's pointing to the old name to 272460ce86c7SWei Liu * start pointing to the new name 272560ce86c7SWei Liu */ 272660ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 272760ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 272860ce86c7SWei Liu /* replace the name */ 272960ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 273060ce86c7SWei Liu } 273160ce86c7SWei Liu } 27324fa62005SGreg Kurz out: 273360ce86c7SWei Liu v9fs_path_free(&oldpath); 273460ce86c7SWei Liu v9fs_path_free(&newpath); 27354fa62005SGreg Kurz return err; 273660ce86c7SWei Liu } 273760ce86c7SWei Liu 27388440e22eSGreg Kurz static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 27398440e22eSGreg Kurz V9fsString *old_name, 27408440e22eSGreg Kurz int32_t newdirfid, 274160ce86c7SWei Liu V9fsString *new_name) 274260ce86c7SWei Liu { 274360ce86c7SWei Liu int err = 0; 274460ce86c7SWei Liu V9fsState *s = pdu->s; 274560ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 274660ce86c7SWei Liu 274760ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 274860ce86c7SWei Liu if (olddirfidp == NULL) { 274960ce86c7SWei Liu err = -ENOENT; 275060ce86c7SWei Liu goto out; 275160ce86c7SWei Liu } 275260ce86c7SWei Liu if (newdirfid != -1) { 275360ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 275460ce86c7SWei Liu if (newdirfidp == NULL) { 275560ce86c7SWei Liu err = -ENOENT; 275660ce86c7SWei Liu goto out; 275760ce86c7SWei Liu } 275860ce86c7SWei Liu } else { 275960ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 276060ce86c7SWei Liu } 276160ce86c7SWei Liu 276260ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 276360ce86c7SWei Liu &newdirfidp->path, new_name); 276460ce86c7SWei Liu if (err < 0) { 276560ce86c7SWei Liu goto out; 276660ce86c7SWei Liu } 276760ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 276860ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 27694fa62005SGreg Kurz err = v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 277060ce86c7SWei Liu &newdirfidp->path, new_name); 277160ce86c7SWei Liu } 277260ce86c7SWei Liu out: 277360ce86c7SWei Liu if (olddirfidp) { 277460ce86c7SWei Liu put_fid(pdu, olddirfidp); 277560ce86c7SWei Liu } 277660ce86c7SWei Liu if (newdirfidp) { 277760ce86c7SWei Liu put_fid(pdu, newdirfidp); 277860ce86c7SWei Liu } 277960ce86c7SWei Liu return err; 278060ce86c7SWei Liu } 278160ce86c7SWei Liu 27828440e22eSGreg Kurz static void coroutine_fn v9fs_renameat(void *opaque) 278360ce86c7SWei Liu { 278460ce86c7SWei Liu ssize_t err = 0; 278560ce86c7SWei Liu size_t offset = 7; 278660ce86c7SWei Liu V9fsPDU *pdu = opaque; 278760ce86c7SWei Liu V9fsState *s = pdu->s; 278860ce86c7SWei Liu int32_t olddirfid, newdirfid; 278960ce86c7SWei Liu V9fsString old_name, new_name; 279060ce86c7SWei Liu 279160ce86c7SWei Liu v9fs_string_init(&old_name); 279260ce86c7SWei Liu v9fs_string_init(&new_name); 279360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 279460ce86c7SWei Liu &old_name, &newdirfid, &new_name); 279560ce86c7SWei Liu if (err < 0) { 279660ce86c7SWei Liu goto out_err; 279760ce86c7SWei Liu } 279860ce86c7SWei Liu 2799fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 2800fff39a7aSGreg Kurz err = -ENOENT; 2801fff39a7aSGreg Kurz goto out_err; 2802fff39a7aSGreg Kurz } 2803fff39a7aSGreg Kurz 2804805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 2805805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 2806805b5d98SGreg Kurz err = -EISDIR; 2807805b5d98SGreg Kurz goto out_err; 2808805b5d98SGreg Kurz } 2809805b5d98SGreg Kurz 281060ce86c7SWei Liu v9fs_path_write_lock(s); 281160ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 281260ce86c7SWei Liu &old_name, newdirfid, &new_name); 281360ce86c7SWei Liu v9fs_path_unlock(s); 281460ce86c7SWei Liu if (!err) { 281560ce86c7SWei Liu err = offset; 281660ce86c7SWei Liu } 281760ce86c7SWei Liu 281860ce86c7SWei Liu out_err: 281960ce86c7SWei Liu pdu_complete(pdu, err); 282060ce86c7SWei Liu v9fs_string_free(&old_name); 282160ce86c7SWei Liu v9fs_string_free(&new_name); 282260ce86c7SWei Liu } 282360ce86c7SWei Liu 28248440e22eSGreg Kurz static void coroutine_fn v9fs_wstat(void *opaque) 282560ce86c7SWei Liu { 282660ce86c7SWei Liu int32_t fid; 282760ce86c7SWei Liu int err = 0; 282860ce86c7SWei Liu int16_t unused; 282960ce86c7SWei Liu V9fsStat v9stat; 283060ce86c7SWei Liu size_t offset = 7; 283160ce86c7SWei Liu struct stat stbuf; 283260ce86c7SWei Liu V9fsFidState *fidp; 283360ce86c7SWei Liu V9fsPDU *pdu = opaque; 283460ce86c7SWei Liu 283560ce86c7SWei Liu v9fs_stat_init(&v9stat); 283660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 283760ce86c7SWei Liu if (err < 0) { 283860ce86c7SWei Liu goto out_nofid; 283960ce86c7SWei Liu } 284060ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 284160ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 284260ce86c7SWei Liu 284360ce86c7SWei Liu fidp = get_fid(pdu, fid); 284460ce86c7SWei Liu if (fidp == NULL) { 284560ce86c7SWei Liu err = -EINVAL; 284660ce86c7SWei Liu goto out_nofid; 284760ce86c7SWei Liu } 284860ce86c7SWei Liu /* do we need to sync the file? */ 284960ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 285060ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 285160ce86c7SWei Liu goto out; 285260ce86c7SWei Liu } 285360ce86c7SWei Liu if (v9stat.mode != -1) { 285460ce86c7SWei Liu uint32_t v9_mode; 285560ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 285660ce86c7SWei Liu if (err < 0) { 285760ce86c7SWei Liu goto out; 285860ce86c7SWei Liu } 285960ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 286060ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 286160ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 286260ce86c7SWei Liu /* Attempting to change the type */ 286360ce86c7SWei Liu err = -EIO; 286460ce86c7SWei Liu goto out; 286560ce86c7SWei Liu } 286660ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 286760ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 286860ce86c7SWei Liu &v9stat.extension)); 286960ce86c7SWei Liu if (err < 0) { 287060ce86c7SWei Liu goto out; 287160ce86c7SWei Liu } 287260ce86c7SWei Liu } 287360ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 287460ce86c7SWei Liu struct timespec times[2]; 287560ce86c7SWei Liu if (v9stat.atime != -1) { 287660ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 287760ce86c7SWei Liu times[0].tv_nsec = 0; 287860ce86c7SWei Liu } else { 287960ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 288060ce86c7SWei Liu } 288160ce86c7SWei Liu if (v9stat.mtime != -1) { 288260ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 288360ce86c7SWei Liu times[1].tv_nsec = 0; 288460ce86c7SWei Liu } else { 288560ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 288660ce86c7SWei Liu } 288760ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 288860ce86c7SWei Liu if (err < 0) { 288960ce86c7SWei Liu goto out; 289060ce86c7SWei Liu } 289160ce86c7SWei Liu } 289260ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 289360ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 289460ce86c7SWei Liu if (err < 0) { 289560ce86c7SWei Liu goto out; 289660ce86c7SWei Liu } 289760ce86c7SWei Liu } 289860ce86c7SWei Liu if (v9stat.name.size != 0) { 289960ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 290060ce86c7SWei Liu if (err < 0) { 290160ce86c7SWei Liu goto out; 290260ce86c7SWei Liu } 290360ce86c7SWei Liu } 290460ce86c7SWei Liu if (v9stat.length != -1) { 290560ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 290660ce86c7SWei Liu if (err < 0) { 290760ce86c7SWei Liu goto out; 290860ce86c7SWei Liu } 290960ce86c7SWei Liu } 291060ce86c7SWei Liu err = offset; 291160ce86c7SWei Liu out: 291260ce86c7SWei Liu put_fid(pdu, fidp); 291360ce86c7SWei Liu out_nofid: 291460ce86c7SWei Liu v9fs_stat_free(&v9stat); 291560ce86c7SWei Liu pdu_complete(pdu, err); 291660ce86c7SWei Liu } 291760ce86c7SWei Liu 291860ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 291960ce86c7SWei Liu { 292060ce86c7SWei Liu uint32_t f_type; 292160ce86c7SWei Liu uint32_t f_bsize; 292260ce86c7SWei Liu uint64_t f_blocks; 292360ce86c7SWei Liu uint64_t f_bfree; 292460ce86c7SWei Liu uint64_t f_bavail; 292560ce86c7SWei Liu uint64_t f_files; 292660ce86c7SWei Liu uint64_t f_ffree; 292760ce86c7SWei Liu uint64_t fsid_val; 292860ce86c7SWei Liu uint32_t f_namelen; 292960ce86c7SWei Liu size_t offset = 7; 293060ce86c7SWei Liu int32_t bsize_factor; 293160ce86c7SWei Liu 293260ce86c7SWei Liu /* 293360ce86c7SWei Liu * compute bsize factor based on host file system block size 293460ce86c7SWei Liu * and client msize 293560ce86c7SWei Liu */ 293660ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 293760ce86c7SWei Liu if (!bsize_factor) { 293860ce86c7SWei Liu bsize_factor = 1; 293960ce86c7SWei Liu } 294060ce86c7SWei Liu f_type = stbuf->f_type; 294160ce86c7SWei Liu f_bsize = stbuf->f_bsize; 294260ce86c7SWei Liu f_bsize *= bsize_factor; 294360ce86c7SWei Liu /* 294460ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 294560ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 294660ce86c7SWei Liu * blocks by bsize factor 294760ce86c7SWei Liu */ 294860ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 294960ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 295060ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 295160ce86c7SWei Liu f_files = stbuf->f_files; 295260ce86c7SWei Liu f_ffree = stbuf->f_ffree; 295360ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 295460ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 295560ce86c7SWei Liu f_namelen = stbuf->f_namelen; 295660ce86c7SWei Liu 295760ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 295860ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 295960ce86c7SWei Liu f_bavail, f_files, f_ffree, 296060ce86c7SWei Liu fsid_val, f_namelen); 296160ce86c7SWei Liu } 296260ce86c7SWei Liu 29638440e22eSGreg Kurz static void coroutine_fn v9fs_statfs(void *opaque) 296460ce86c7SWei Liu { 296560ce86c7SWei Liu int32_t fid; 296660ce86c7SWei Liu ssize_t retval = 0; 296760ce86c7SWei Liu size_t offset = 7; 296860ce86c7SWei Liu V9fsFidState *fidp; 296960ce86c7SWei Liu struct statfs stbuf; 297060ce86c7SWei Liu V9fsPDU *pdu = opaque; 297160ce86c7SWei Liu V9fsState *s = pdu->s; 297260ce86c7SWei Liu 297360ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 297460ce86c7SWei Liu if (retval < 0) { 297560ce86c7SWei Liu goto out_nofid; 297660ce86c7SWei Liu } 297760ce86c7SWei Liu fidp = get_fid(pdu, fid); 297860ce86c7SWei Liu if (fidp == NULL) { 297960ce86c7SWei Liu retval = -ENOENT; 298060ce86c7SWei Liu goto out_nofid; 298160ce86c7SWei Liu } 298260ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 298360ce86c7SWei Liu if (retval < 0) { 298460ce86c7SWei Liu goto out; 298560ce86c7SWei Liu } 298660ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 298760ce86c7SWei Liu if (retval < 0) { 298860ce86c7SWei Liu goto out; 298960ce86c7SWei Liu } 299060ce86c7SWei Liu retval += offset; 299160ce86c7SWei Liu out: 299260ce86c7SWei Liu put_fid(pdu, fidp); 299360ce86c7SWei Liu out_nofid: 299460ce86c7SWei Liu pdu_complete(pdu, retval); 299560ce86c7SWei Liu } 299660ce86c7SWei Liu 29978440e22eSGreg Kurz static void coroutine_fn v9fs_mknod(void *opaque) 299860ce86c7SWei Liu { 299960ce86c7SWei Liu 300060ce86c7SWei Liu int mode; 300160ce86c7SWei Liu gid_t gid; 300260ce86c7SWei Liu int32_t fid; 300360ce86c7SWei Liu V9fsQID qid; 300460ce86c7SWei Liu int err = 0; 300560ce86c7SWei Liu int major, minor; 300660ce86c7SWei Liu size_t offset = 7; 300760ce86c7SWei Liu V9fsString name; 300860ce86c7SWei Liu struct stat stbuf; 300960ce86c7SWei Liu V9fsFidState *fidp; 301060ce86c7SWei Liu V9fsPDU *pdu = opaque; 301160ce86c7SWei Liu 301260ce86c7SWei Liu v9fs_string_init(&name); 301360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 301460ce86c7SWei Liu &major, &minor, &gid); 301560ce86c7SWei Liu if (err < 0) { 301660ce86c7SWei Liu goto out_nofid; 301760ce86c7SWei Liu } 301860ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 301960ce86c7SWei Liu 3020fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3021fff39a7aSGreg Kurz err = -ENOENT; 3022fff39a7aSGreg Kurz goto out_nofid; 3023fff39a7aSGreg Kurz } 3024fff39a7aSGreg Kurz 3025805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3026805b5d98SGreg Kurz err = -EEXIST; 3027805b5d98SGreg Kurz goto out_nofid; 3028805b5d98SGreg Kurz } 3029805b5d98SGreg Kurz 303060ce86c7SWei Liu fidp = get_fid(pdu, fid); 303160ce86c7SWei Liu if (fidp == NULL) { 303260ce86c7SWei Liu err = -ENOENT; 303360ce86c7SWei Liu goto out_nofid; 303460ce86c7SWei Liu } 303560ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 303660ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 303760ce86c7SWei Liu if (err < 0) { 303860ce86c7SWei Liu goto out; 303960ce86c7SWei Liu } 304060ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 304160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 304260ce86c7SWei Liu if (err < 0) { 304360ce86c7SWei Liu goto out; 304460ce86c7SWei Liu } 304560ce86c7SWei Liu err += offset; 304660ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 304760ce86c7SWei Liu qid.type, qid.version, qid.path); 304860ce86c7SWei Liu out: 304960ce86c7SWei Liu put_fid(pdu, fidp); 305060ce86c7SWei Liu out_nofid: 305160ce86c7SWei Liu pdu_complete(pdu, err); 305260ce86c7SWei Liu v9fs_string_free(&name); 305360ce86c7SWei Liu } 305460ce86c7SWei Liu 305560ce86c7SWei Liu /* 305660ce86c7SWei Liu * Implement posix byte range locking code 305760ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 305860ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 305960ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 306060ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 306160ce86c7SWei Liu * So when a TLOCK request comes, always return success 306260ce86c7SWei Liu */ 30638440e22eSGreg Kurz static void coroutine_fn v9fs_lock(void *opaque) 306460ce86c7SWei Liu { 306560ce86c7SWei Liu V9fsFlock flock; 306660ce86c7SWei Liu size_t offset = 7; 306760ce86c7SWei Liu struct stat stbuf; 306860ce86c7SWei Liu V9fsFidState *fidp; 306960ce86c7SWei Liu int32_t fid, err = 0; 307060ce86c7SWei Liu V9fsPDU *pdu = opaque; 307160ce86c7SWei Liu 307260ce86c7SWei Liu v9fs_string_init(&flock.client_id); 307360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 307460ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 307560ce86c7SWei Liu &flock.proc_id, &flock.client_id); 307660ce86c7SWei Liu if (err < 0) { 307760ce86c7SWei Liu goto out_nofid; 307860ce86c7SWei Liu } 307960ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 308060ce86c7SWei Liu flock.type, flock.start, flock.length); 308160ce86c7SWei Liu 308260ce86c7SWei Liu 308360ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 308460ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 308560ce86c7SWei Liu err = -EINVAL; 308660ce86c7SWei Liu goto out_nofid; 308760ce86c7SWei Liu } 308860ce86c7SWei Liu fidp = get_fid(pdu, fid); 308960ce86c7SWei Liu if (fidp == NULL) { 309060ce86c7SWei Liu err = -ENOENT; 309160ce86c7SWei Liu goto out_nofid; 309260ce86c7SWei Liu } 309360ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 309460ce86c7SWei Liu if (err < 0) { 309560ce86c7SWei Liu goto out; 309660ce86c7SWei Liu } 30974bae2b39SPaolo Bonzini err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); 30984bae2b39SPaolo Bonzini if (err < 0) { 30994bae2b39SPaolo Bonzini goto out; 31004bae2b39SPaolo Bonzini } 31014bae2b39SPaolo Bonzini err += offset; 31024bae2b39SPaolo Bonzini trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); 310360ce86c7SWei Liu out: 310460ce86c7SWei Liu put_fid(pdu, fidp); 310560ce86c7SWei Liu out_nofid: 310660ce86c7SWei Liu pdu_complete(pdu, err); 310760ce86c7SWei Liu v9fs_string_free(&flock.client_id); 310860ce86c7SWei Liu } 310960ce86c7SWei Liu 311060ce86c7SWei Liu /* 311160ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 311260ce86c7SWei Liu * handling is done by client's VFS layer. 311360ce86c7SWei Liu */ 31148440e22eSGreg Kurz static void coroutine_fn v9fs_getlock(void *opaque) 311560ce86c7SWei Liu { 311660ce86c7SWei Liu size_t offset = 7; 311760ce86c7SWei Liu struct stat stbuf; 311860ce86c7SWei Liu V9fsFidState *fidp; 311960ce86c7SWei Liu V9fsGetlock glock; 312060ce86c7SWei Liu int32_t fid, err = 0; 312160ce86c7SWei Liu V9fsPDU *pdu = opaque; 312260ce86c7SWei Liu 312360ce86c7SWei Liu v9fs_string_init(&glock.client_id); 312460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 312560ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 312660ce86c7SWei Liu &glock.client_id); 312760ce86c7SWei Liu if (err < 0) { 312860ce86c7SWei Liu goto out_nofid; 312960ce86c7SWei Liu } 313060ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 313160ce86c7SWei Liu glock.type, glock.start, glock.length); 313260ce86c7SWei Liu 313360ce86c7SWei Liu fidp = get_fid(pdu, fid); 313460ce86c7SWei Liu if (fidp == NULL) { 313560ce86c7SWei Liu err = -ENOENT; 313660ce86c7SWei Liu goto out_nofid; 313760ce86c7SWei Liu } 313860ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 313960ce86c7SWei Liu if (err < 0) { 314060ce86c7SWei Liu goto out; 314160ce86c7SWei Liu } 314260ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 314360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 314460ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 314560ce86c7SWei Liu &glock.client_id); 314660ce86c7SWei Liu if (err < 0) { 314760ce86c7SWei Liu goto out; 314860ce86c7SWei Liu } 314960ce86c7SWei Liu err += offset; 315060ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 315160ce86c7SWei Liu glock.length, glock.proc_id); 315260ce86c7SWei Liu out: 315360ce86c7SWei Liu put_fid(pdu, fidp); 315460ce86c7SWei Liu out_nofid: 315560ce86c7SWei Liu pdu_complete(pdu, err); 315660ce86c7SWei Liu v9fs_string_free(&glock.client_id); 315760ce86c7SWei Liu } 315860ce86c7SWei Liu 31598440e22eSGreg Kurz static void coroutine_fn v9fs_mkdir(void *opaque) 316060ce86c7SWei Liu { 316160ce86c7SWei Liu V9fsPDU *pdu = opaque; 316260ce86c7SWei Liu size_t offset = 7; 316360ce86c7SWei Liu int32_t fid; 316460ce86c7SWei Liu struct stat stbuf; 316560ce86c7SWei Liu V9fsQID qid; 316660ce86c7SWei Liu V9fsString name; 316760ce86c7SWei Liu V9fsFidState *fidp; 316860ce86c7SWei Liu gid_t gid; 316960ce86c7SWei Liu int mode; 317060ce86c7SWei Liu int err = 0; 317160ce86c7SWei Liu 317260ce86c7SWei Liu v9fs_string_init(&name); 317360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 317460ce86c7SWei Liu if (err < 0) { 317560ce86c7SWei Liu goto out_nofid; 317660ce86c7SWei Liu } 317760ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 317860ce86c7SWei Liu 3179fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3180fff39a7aSGreg Kurz err = -ENOENT; 3181fff39a7aSGreg Kurz goto out_nofid; 3182fff39a7aSGreg Kurz } 3183fff39a7aSGreg Kurz 3184805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3185805b5d98SGreg Kurz err = -EEXIST; 3186805b5d98SGreg Kurz goto out_nofid; 3187805b5d98SGreg Kurz } 3188805b5d98SGreg Kurz 318960ce86c7SWei Liu fidp = get_fid(pdu, fid); 319060ce86c7SWei Liu if (fidp == NULL) { 319160ce86c7SWei Liu err = -ENOENT; 319260ce86c7SWei Liu goto out_nofid; 319360ce86c7SWei Liu } 319460ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 319560ce86c7SWei Liu if (err < 0) { 319660ce86c7SWei Liu goto out; 319760ce86c7SWei Liu } 319860ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 319960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 320060ce86c7SWei Liu if (err < 0) { 320160ce86c7SWei Liu goto out; 320260ce86c7SWei Liu } 320360ce86c7SWei Liu err += offset; 320460ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 320560ce86c7SWei Liu qid.type, qid.version, qid.path, err); 320660ce86c7SWei Liu out: 320760ce86c7SWei Liu put_fid(pdu, fidp); 320860ce86c7SWei Liu out_nofid: 320960ce86c7SWei Liu pdu_complete(pdu, err); 321060ce86c7SWei Liu v9fs_string_free(&name); 321160ce86c7SWei Liu } 321260ce86c7SWei Liu 32138440e22eSGreg Kurz static void coroutine_fn v9fs_xattrwalk(void *opaque) 321460ce86c7SWei Liu { 321560ce86c7SWei Liu int64_t size; 321660ce86c7SWei Liu V9fsString name; 321760ce86c7SWei Liu ssize_t err = 0; 321860ce86c7SWei Liu size_t offset = 7; 321960ce86c7SWei Liu int32_t fid, newfid; 322060ce86c7SWei Liu V9fsFidState *file_fidp; 322160ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 322260ce86c7SWei Liu V9fsPDU *pdu = opaque; 322360ce86c7SWei Liu V9fsState *s = pdu->s; 322460ce86c7SWei Liu 322560ce86c7SWei Liu v9fs_string_init(&name); 322660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 322760ce86c7SWei Liu if (err < 0) { 322860ce86c7SWei Liu goto out_nofid; 322960ce86c7SWei Liu } 323060ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 323160ce86c7SWei Liu 323260ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 323360ce86c7SWei Liu if (file_fidp == NULL) { 323460ce86c7SWei Liu err = -ENOENT; 323560ce86c7SWei Liu goto out_nofid; 323660ce86c7SWei Liu } 323760ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 323860ce86c7SWei Liu if (xattr_fidp == NULL) { 323960ce86c7SWei Liu err = -EINVAL; 324060ce86c7SWei Liu goto out; 324160ce86c7SWei Liu } 324260ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 3243ba42ebb8SLi Qiang if (!v9fs_string_size(&name)) { 324460ce86c7SWei Liu /* 324560ce86c7SWei Liu * listxattr request. Get the size first 324660ce86c7SWei Liu */ 324760ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 324860ce86c7SWei Liu if (size < 0) { 324960ce86c7SWei Liu err = size; 325060ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 325160ce86c7SWei Liu goto out; 325260ce86c7SWei Liu } 325360ce86c7SWei Liu /* 325460ce86c7SWei Liu * Read the xattr value 325560ce86c7SWei Liu */ 325660ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 325760ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3258dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 32597bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3260*a647502cSKeno Fischer if (size) { 326160ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 326260ce86c7SWei Liu xattr_fidp->fs.xattr.value, 326360ce86c7SWei Liu xattr_fidp->fs.xattr.len); 326460ce86c7SWei Liu if (err < 0) { 326560ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 326660ce86c7SWei Liu goto out; 326760ce86c7SWei Liu } 326860ce86c7SWei Liu } 326960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 327060ce86c7SWei Liu if (err < 0) { 327160ce86c7SWei Liu goto out; 327260ce86c7SWei Liu } 327360ce86c7SWei Liu err += offset; 327460ce86c7SWei Liu } else { 327560ce86c7SWei Liu /* 327660ce86c7SWei Liu * specific xattr fid. We check for xattr 327760ce86c7SWei Liu * presence also collect the xattr size 327860ce86c7SWei Liu */ 327960ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 328060ce86c7SWei Liu &name, NULL, 0); 328160ce86c7SWei Liu if (size < 0) { 328260ce86c7SWei Liu err = size; 328360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 328460ce86c7SWei Liu goto out; 328560ce86c7SWei Liu } 328660ce86c7SWei Liu /* 328760ce86c7SWei Liu * Read the xattr value 328860ce86c7SWei Liu */ 328960ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 329060ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3291dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 32927bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3293*a647502cSKeno Fischer if (size) { 329460ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 329560ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 329660ce86c7SWei Liu xattr_fidp->fs.xattr.len); 329760ce86c7SWei Liu if (err < 0) { 329860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 329960ce86c7SWei Liu goto out; 330060ce86c7SWei Liu } 330160ce86c7SWei Liu } 330260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 330360ce86c7SWei Liu if (err < 0) { 330460ce86c7SWei Liu goto out; 330560ce86c7SWei Liu } 330660ce86c7SWei Liu err += offset; 330760ce86c7SWei Liu } 330860ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 330960ce86c7SWei Liu out: 331060ce86c7SWei Liu put_fid(pdu, file_fidp); 331160ce86c7SWei Liu if (xattr_fidp) { 331260ce86c7SWei Liu put_fid(pdu, xattr_fidp); 331360ce86c7SWei Liu } 331460ce86c7SWei Liu out_nofid: 331560ce86c7SWei Liu pdu_complete(pdu, err); 331660ce86c7SWei Liu v9fs_string_free(&name); 331760ce86c7SWei Liu } 331860ce86c7SWei Liu 33198440e22eSGreg Kurz static void coroutine_fn v9fs_xattrcreate(void *opaque) 332060ce86c7SWei Liu { 332160ce86c7SWei Liu int flags; 332260ce86c7SWei Liu int32_t fid; 33233b79ef2cSGreg Kurz uint64_t size; 332460ce86c7SWei Liu ssize_t err = 0; 332560ce86c7SWei Liu V9fsString name; 332660ce86c7SWei Liu size_t offset = 7; 332760ce86c7SWei Liu V9fsFidState *file_fidp; 332860ce86c7SWei Liu V9fsFidState *xattr_fidp; 332960ce86c7SWei Liu V9fsPDU *pdu = opaque; 333060ce86c7SWei Liu 333160ce86c7SWei Liu v9fs_string_init(&name); 333260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 333360ce86c7SWei Liu if (err < 0) { 333460ce86c7SWei Liu goto out_nofid; 333560ce86c7SWei Liu } 333660ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 333760ce86c7SWei Liu 33383b79ef2cSGreg Kurz if (size > XATTR_SIZE_MAX) { 33393b79ef2cSGreg Kurz err = -E2BIG; 33403b79ef2cSGreg Kurz goto out_nofid; 33413b79ef2cSGreg Kurz } 33423b79ef2cSGreg Kurz 334360ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 334460ce86c7SWei Liu if (file_fidp == NULL) { 334560ce86c7SWei Liu err = -EINVAL; 334660ce86c7SWei Liu goto out_nofid; 334760ce86c7SWei Liu } 3348dd654e03SGreg Kurz if (file_fidp->fid_type != P9_FID_NONE) { 3349dd654e03SGreg Kurz err = -EINVAL; 3350dd654e03SGreg Kurz goto out_put_fid; 3351dd654e03SGreg Kurz } 3352dd654e03SGreg Kurz 335360ce86c7SWei Liu /* Make the file fid point to xattr */ 335460ce86c7SWei Liu xattr_fidp = file_fidp; 335560ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 335660ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 3357dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = false; 335860ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 335960ce86c7SWei Liu xattr_fidp->fs.xattr.flags = flags; 336060ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 336160ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 3362eb687602SLi Qiang xattr_fidp->fs.xattr.value = g_malloc0(size); 336360ce86c7SWei Liu err = offset; 3364dd654e03SGreg Kurz out_put_fid: 336560ce86c7SWei Liu put_fid(pdu, file_fidp); 336660ce86c7SWei Liu out_nofid: 336760ce86c7SWei Liu pdu_complete(pdu, err); 336860ce86c7SWei Liu v9fs_string_free(&name); 336960ce86c7SWei Liu } 337060ce86c7SWei Liu 33718440e22eSGreg Kurz static void coroutine_fn v9fs_readlink(void *opaque) 337260ce86c7SWei Liu { 337360ce86c7SWei Liu V9fsPDU *pdu = opaque; 337460ce86c7SWei Liu size_t offset = 7; 337560ce86c7SWei Liu V9fsString target; 337660ce86c7SWei Liu int32_t fid; 337760ce86c7SWei Liu int err = 0; 337860ce86c7SWei Liu V9fsFidState *fidp; 337960ce86c7SWei Liu 338060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 338160ce86c7SWei Liu if (err < 0) { 338260ce86c7SWei Liu goto out_nofid; 338360ce86c7SWei Liu } 338460ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 338560ce86c7SWei Liu fidp = get_fid(pdu, fid); 338660ce86c7SWei Liu if (fidp == NULL) { 338760ce86c7SWei Liu err = -ENOENT; 338860ce86c7SWei Liu goto out_nofid; 338960ce86c7SWei Liu } 339060ce86c7SWei Liu 339160ce86c7SWei Liu v9fs_string_init(&target); 339260ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 339360ce86c7SWei Liu if (err < 0) { 339460ce86c7SWei Liu goto out; 339560ce86c7SWei Liu } 339660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 339760ce86c7SWei Liu if (err < 0) { 339860ce86c7SWei Liu v9fs_string_free(&target); 339960ce86c7SWei Liu goto out; 340060ce86c7SWei Liu } 340160ce86c7SWei Liu err += offset; 340260ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 340360ce86c7SWei Liu v9fs_string_free(&target); 340460ce86c7SWei Liu out: 340560ce86c7SWei Liu put_fid(pdu, fidp); 340660ce86c7SWei Liu out_nofid: 340760ce86c7SWei Liu pdu_complete(pdu, err); 340860ce86c7SWei Liu } 340960ce86c7SWei Liu 341060ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 341160ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 341260ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 341360ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 341460ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 341560ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 341660ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 341760ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 341860ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 341960ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 342060ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 342160ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 342260ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 342360ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 342460ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 342560ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 342660ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 342760ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 342860ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 342960ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 343060ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 343160ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 343260ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 343360ce86c7SWei Liu [P9_TREAD] = v9fs_read, 343460ce86c7SWei Liu #if 0 343560ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 343660ce86c7SWei Liu #endif 343760ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 343860ce86c7SWei Liu [P9_TLINK] = v9fs_link, 343960ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 344060ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 344160ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 344260ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 344360ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 344460ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 344560ce86c7SWei Liu }; 344660ce86c7SWei Liu 34478440e22eSGreg Kurz static void coroutine_fn v9fs_op_not_supp(void *opaque) 344860ce86c7SWei Liu { 344960ce86c7SWei Liu V9fsPDU *pdu = opaque; 345060ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 345160ce86c7SWei Liu } 345260ce86c7SWei Liu 34538440e22eSGreg Kurz static void coroutine_fn v9fs_fs_ro(void *opaque) 345460ce86c7SWei Liu { 345560ce86c7SWei Liu V9fsPDU *pdu = opaque; 345660ce86c7SWei Liu pdu_complete(pdu, -EROFS); 345760ce86c7SWei Liu } 345860ce86c7SWei Liu 345960ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 346060ce86c7SWei Liu { 346160ce86c7SWei Liu switch (pdu->id) { 346260ce86c7SWei Liu case P9_TREADDIR: 346360ce86c7SWei Liu case P9_TSTATFS: 346460ce86c7SWei Liu case P9_TGETATTR: 346560ce86c7SWei Liu case P9_TXATTRWALK: 346660ce86c7SWei Liu case P9_TLOCK: 346760ce86c7SWei Liu case P9_TGETLOCK: 346860ce86c7SWei Liu case P9_TREADLINK: 346960ce86c7SWei Liu case P9_TVERSION: 347060ce86c7SWei Liu case P9_TLOPEN: 347160ce86c7SWei Liu case P9_TATTACH: 347260ce86c7SWei Liu case P9_TSTAT: 347360ce86c7SWei Liu case P9_TWALK: 347460ce86c7SWei Liu case P9_TCLUNK: 347560ce86c7SWei Liu case P9_TFSYNC: 347660ce86c7SWei Liu case P9_TOPEN: 347760ce86c7SWei Liu case P9_TREAD: 347860ce86c7SWei Liu case P9_TAUTH: 347960ce86c7SWei Liu case P9_TFLUSH: 348060ce86c7SWei Liu return 1; 348160ce86c7SWei Liu default: 348260ce86c7SWei Liu return 0; 348360ce86c7SWei Liu } 348460ce86c7SWei Liu } 348560ce86c7SWei Liu 3486506f3275SGreg Kurz void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr) 348760ce86c7SWei Liu { 348860ce86c7SWei Liu Coroutine *co; 348960ce86c7SWei Liu CoroutineEntry *handler; 349060ce86c7SWei Liu V9fsState *s = pdu->s; 349160ce86c7SWei Liu 3492506f3275SGreg Kurz pdu->size = le32_to_cpu(hdr->size_le); 3493506f3275SGreg Kurz pdu->id = hdr->id; 3494506f3275SGreg Kurz pdu->tag = le16_to_cpu(hdr->tag_le); 3495506f3275SGreg Kurz 349660ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 349760ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 349860ce86c7SWei Liu handler = v9fs_op_not_supp; 3499d1471233SGreg Kurz } else if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 3500d1471233SGreg Kurz handler = v9fs_fs_ro; 350160ce86c7SWei Liu } else { 350260ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 350360ce86c7SWei Liu } 350460ce86c7SWei Liu 3505506f3275SGreg Kurz qemu_co_queue_init(&pdu->complete); 35060b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 35070b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 350860ce86c7SWei Liu } 350960ce86c7SWei Liu 35102a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 3511066eb006SGreg Kurz int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t, 3512066eb006SGreg Kurz Error **errp) 35132a0c56aaSWei Liu { 35142a0c56aaSWei Liu int i, len; 35152a0c56aaSWei Liu struct stat stat; 35162a0c56aaSWei Liu FsDriverEntry *fse; 35172a0c56aaSWei Liu V9fsPath path; 35182a0c56aaSWei Liu int rc = 1; 35192a0c56aaSWei Liu 3520066eb006SGreg Kurz assert(!s->transport); 3521066eb006SGreg Kurz s->transport = t; 3522066eb006SGreg Kurz 35232a0c56aaSWei Liu /* initialize pdu allocator */ 35242a0c56aaSWei Liu QLIST_INIT(&s->free_list); 35252a0c56aaSWei Liu QLIST_INIT(&s->active_list); 35260d78289cSGreg Kurz for (i = 0; i < MAX_REQ; i++) { 3527583f21f8SStefano Stabellini QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 3528583f21f8SStefano Stabellini s->pdus[i].s = s; 3529583f21f8SStefano Stabellini s->pdus[i].idx = i; 35302a0c56aaSWei Liu } 35312a0c56aaSWei Liu 35322a0c56aaSWei Liu v9fs_path_init(&path); 35332a0c56aaSWei Liu 35342a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 35352a0c56aaSWei Liu 35362a0c56aaSWei Liu if (!fse) { 35372a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 35382a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 35392a0c56aaSWei Liu "id = %s", 35402a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 35412a0c56aaSWei Liu goto out; 35422a0c56aaSWei Liu } 35432a0c56aaSWei Liu 35442a0c56aaSWei Liu if (!s->fsconf.tag) { 35452a0c56aaSWei Liu /* we haven't specified a mount_tag */ 35462a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 35472a0c56aaSWei Liu s->fsconf.fsdev_id); 35482a0c56aaSWei Liu goto out; 35492a0c56aaSWei Liu } 35502a0c56aaSWei Liu 35512a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 35522a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 35532a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 35542a0c56aaSWei Liu len = strlen(s->fsconf.tag); 35552a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 35562a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 35572a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 35582a0c56aaSWei Liu goto out; 35592a0c56aaSWei Liu } 35602a0c56aaSWei Liu 35612a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 35622a0c56aaSWei Liu s->ctx.uid = -1; 35632a0c56aaSWei Liu 35642a0c56aaSWei Liu s->ops = fse->ops; 35652a0c56aaSWei Liu 3566b96feb2cSTobias Schramm s->ctx.fmode = fse->fmode; 3567b96feb2cSTobias Schramm s->ctx.dmode = fse->dmode; 3568b96feb2cSTobias Schramm 35692a0c56aaSWei Liu s->fid_list = NULL; 35702a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 35712a0c56aaSWei Liu 357265603a80SGreg Kurz if (s->ops->init(&s->ctx, errp) < 0) { 357365603a80SGreg Kurz error_prepend(errp, "cannot initialize fsdev '%s': ", 357465603a80SGreg Kurz s->fsconf.fsdev_id); 35752a0c56aaSWei Liu goto out; 35762a0c56aaSWei Liu } 35772a0c56aaSWei Liu 35782a0c56aaSWei Liu /* 35792a0c56aaSWei Liu * Check details of export path, We need to use fs driver 35802a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 35812a0c56aaSWei Liu * use co-routines here. 35822a0c56aaSWei Liu */ 35832a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 35842a0c56aaSWei Liu error_setg(errp, 35852a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 35862a0c56aaSWei Liu goto out; 35872a0c56aaSWei Liu } 35882a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 35892a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 35902a0c56aaSWei Liu goto out; 35912a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 35922a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 35932a0c56aaSWei Liu goto out; 35942a0c56aaSWei Liu } 3595b8bbdb88SPradeep Jagadeesh 3596b8bbdb88SPradeep Jagadeesh s->ctx.fst = &fse->fst; 3597b8bbdb88SPradeep Jagadeesh fsdev_throttle_init(s->ctx.fst); 3598b8bbdb88SPradeep Jagadeesh 35992a0c56aaSWei Liu v9fs_path_free(&path); 36002a0c56aaSWei Liu 36012a0c56aaSWei Liu rc = 0; 36022a0c56aaSWei Liu out: 36032a0c56aaSWei Liu if (rc) { 3604f2b58c43SGreg Kurz if (s->ops && s->ops->cleanup && s->ctx.private) { 3605702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3606702dbcc2SLi Qiang } 36072a0c56aaSWei Liu g_free(s->tag); 36084774718eSLi Qiang g_free(s->ctx.fs_root); 36092a0c56aaSWei Liu v9fs_path_free(&path); 36102a0c56aaSWei Liu } 36112a0c56aaSWei Liu return rc; 36122a0c56aaSWei Liu } 36132a0c56aaSWei Liu 36142a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 36152a0c56aaSWei Liu { 3616702dbcc2SLi Qiang if (s->ops->cleanup) { 3617702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3618702dbcc2SLi Qiang } 3619b8bbdb88SPradeep Jagadeesh fsdev_throttle_cleanup(s->ctx.fst); 36202a0c56aaSWei Liu g_free(s->tag); 36214774718eSLi Qiang g_free(s->ctx.fs_root); 36222a0c56aaSWei Liu } 36232a0c56aaSWei Liu 36240e44a0fdSGreg Kurz typedef struct VirtfsCoResetData { 36250e44a0fdSGreg Kurz V9fsPDU pdu; 36260e44a0fdSGreg Kurz bool done; 36270e44a0fdSGreg Kurz } VirtfsCoResetData; 36280e44a0fdSGreg Kurz 36290e44a0fdSGreg Kurz static void coroutine_fn virtfs_co_reset(void *opaque) 36300e44a0fdSGreg Kurz { 36310e44a0fdSGreg Kurz VirtfsCoResetData *data = opaque; 36320e44a0fdSGreg Kurz 36330e44a0fdSGreg Kurz virtfs_reset(&data->pdu); 36340e44a0fdSGreg Kurz data->done = true; 36350e44a0fdSGreg Kurz } 36360e44a0fdSGreg Kurz 36370e44a0fdSGreg Kurz void v9fs_reset(V9fsState *s) 36380e44a0fdSGreg Kurz { 36390e44a0fdSGreg Kurz VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; 36400e44a0fdSGreg Kurz Coroutine *co; 36410e44a0fdSGreg Kurz 36420e44a0fdSGreg Kurz while (!QLIST_EMPTY(&s->active_list)) { 36430e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 36440e44a0fdSGreg Kurz } 36450e44a0fdSGreg Kurz 36460e44a0fdSGreg Kurz co = qemu_coroutine_create(virtfs_co_reset, &data); 36470e44a0fdSGreg Kurz qemu_coroutine_enter(co); 36480e44a0fdSGreg Kurz 36490e44a0fdSGreg Kurz while (!data.done) { 36500e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 36510e44a0fdSGreg Kurz } 36520e44a0fdSGreg Kurz } 36530e44a0fdSGreg Kurz 365460ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 365560ce86c7SWei Liu { 365660ce86c7SWei Liu struct rlimit rlim; 365760ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 365863325b18SGreg Kurz error_report("Failed to get the resource limit"); 365960ce86c7SWei Liu exit(1); 366060ce86c7SWei Liu } 366160ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 366260ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 366360ce86c7SWei Liu } 3664