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" 20db725815SMarkus Armbruster #include "qemu/main-loop.h" 2160ce86c7SWei Liu #include "qemu/sockets.h" 2260ce86c7SWei Liu #include "virtio-9p.h" 2360ce86c7SWei Liu #include "fsdev/qemu-fsdev.h" 2460ce86c7SWei Liu #include "9p-xattr.h" 2560ce86c7SWei Liu #include "coth.h" 2660ce86c7SWei Liu #include "trace.h" 27795c40b8SJuan Quintela #include "migration/blocker.h" 28357e2f7fSGreg Kurz #include "sysemu/qtest.h" 2960ce86c7SWei Liu 3060ce86c7SWei Liu int open_fd_hw; 3160ce86c7SWei Liu int total_open_fd; 3260ce86c7SWei Liu static int open_fd_rc; 3360ce86c7SWei Liu 3460ce86c7SWei Liu enum { 3560ce86c7SWei Liu Oread = 0x00, 3660ce86c7SWei Liu Owrite = 0x01, 3760ce86c7SWei Liu Ordwr = 0x02, 3860ce86c7SWei Liu Oexec = 0x03, 3960ce86c7SWei Liu Oexcl = 0x04, 4060ce86c7SWei Liu Otrunc = 0x10, 4160ce86c7SWei Liu Orexec = 0x20, 4260ce86c7SWei Liu Orclose = 0x40, 4360ce86c7SWei Liu Oappend = 0x80, 4460ce86c7SWei Liu }; 4560ce86c7SWei Liu 4675673590SGreg Kurz static ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 4760ce86c7SWei Liu { 4860ce86c7SWei Liu ssize_t ret; 4960ce86c7SWei Liu va_list ap; 5060ce86c7SWei Liu 5160ce86c7SWei Liu va_start(ap, fmt); 52ea83441cSStefano Stabellini ret = pdu->s->transport->pdu_vmarshal(pdu, offset, fmt, ap); 5360ce86c7SWei Liu va_end(ap); 5460ce86c7SWei Liu 5560ce86c7SWei Liu return ret; 5660ce86c7SWei Liu } 5760ce86c7SWei Liu 5875673590SGreg Kurz static ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 5960ce86c7SWei Liu { 6060ce86c7SWei Liu ssize_t ret; 6160ce86c7SWei Liu va_list ap; 6260ce86c7SWei Liu 6360ce86c7SWei Liu va_start(ap, fmt); 64ea83441cSStefano Stabellini ret = pdu->s->transport->pdu_vunmarshal(pdu, offset, fmt, ap); 6560ce86c7SWei Liu va_end(ap); 6660ce86c7SWei Liu 6760ce86c7SWei Liu return ret; 6860ce86c7SWei Liu } 6960ce86c7SWei Liu 7060ce86c7SWei Liu static int omode_to_uflags(int8_t mode) 7160ce86c7SWei Liu { 7260ce86c7SWei Liu int ret = 0; 7360ce86c7SWei Liu 7460ce86c7SWei Liu switch (mode & 3) { 7560ce86c7SWei Liu case Oread: 7660ce86c7SWei Liu ret = O_RDONLY; 7760ce86c7SWei Liu break; 7860ce86c7SWei Liu case Ordwr: 7960ce86c7SWei Liu ret = O_RDWR; 8060ce86c7SWei Liu break; 8160ce86c7SWei Liu case Owrite: 8260ce86c7SWei Liu ret = O_WRONLY; 8360ce86c7SWei Liu break; 8460ce86c7SWei Liu case Oexec: 8560ce86c7SWei Liu ret = O_RDONLY; 8660ce86c7SWei Liu break; 8760ce86c7SWei Liu } 8860ce86c7SWei Liu 8960ce86c7SWei Liu if (mode & Otrunc) { 9060ce86c7SWei Liu ret |= O_TRUNC; 9160ce86c7SWei Liu } 9260ce86c7SWei Liu 9360ce86c7SWei Liu if (mode & Oappend) { 9460ce86c7SWei Liu ret |= O_APPEND; 9560ce86c7SWei Liu } 9660ce86c7SWei Liu 9760ce86c7SWei Liu if (mode & Oexcl) { 9860ce86c7SWei Liu ret |= O_EXCL; 9960ce86c7SWei Liu } 10060ce86c7SWei Liu 10160ce86c7SWei Liu return ret; 10260ce86c7SWei Liu } 10360ce86c7SWei Liu 1048e71b96cSGreg Kurz typedef struct DotlOpenflagMap { 10560ce86c7SWei Liu int dotl_flag; 10660ce86c7SWei Liu int open_flag; 1078e71b96cSGreg Kurz } DotlOpenflagMap; 10860ce86c7SWei Liu 10960ce86c7SWei Liu static int dotl_to_open_flags(int flags) 11060ce86c7SWei Liu { 11160ce86c7SWei Liu int i; 11260ce86c7SWei Liu /* 11360ce86c7SWei Liu * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY 11460ce86c7SWei Liu * and P9_DOTL_NOACCESS 11560ce86c7SWei Liu */ 11660ce86c7SWei Liu int oflags = flags & O_ACCMODE; 11760ce86c7SWei Liu 1188e71b96cSGreg Kurz DotlOpenflagMap dotl_oflag_map[] = { 11960ce86c7SWei Liu { P9_DOTL_CREATE, O_CREAT }, 12060ce86c7SWei Liu { P9_DOTL_EXCL, O_EXCL }, 12160ce86c7SWei Liu { P9_DOTL_NOCTTY , O_NOCTTY }, 12260ce86c7SWei Liu { P9_DOTL_TRUNC, O_TRUNC }, 12360ce86c7SWei Liu { P9_DOTL_APPEND, O_APPEND }, 12460ce86c7SWei Liu { P9_DOTL_NONBLOCK, O_NONBLOCK } , 12560ce86c7SWei Liu { P9_DOTL_DSYNC, O_DSYNC }, 12660ce86c7SWei Liu { P9_DOTL_FASYNC, FASYNC }, 12760ce86c7SWei Liu { P9_DOTL_DIRECT, O_DIRECT }, 12860ce86c7SWei Liu { P9_DOTL_LARGEFILE, O_LARGEFILE }, 12960ce86c7SWei Liu { P9_DOTL_DIRECTORY, O_DIRECTORY }, 13060ce86c7SWei Liu { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, 13160ce86c7SWei Liu { P9_DOTL_NOATIME, O_NOATIME }, 13260ce86c7SWei Liu { P9_DOTL_SYNC, O_SYNC }, 13360ce86c7SWei Liu }; 13460ce86c7SWei Liu 13560ce86c7SWei Liu for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { 13660ce86c7SWei Liu if (flags & dotl_oflag_map[i].dotl_flag) { 13760ce86c7SWei Liu oflags |= dotl_oflag_map[i].open_flag; 13860ce86c7SWei Liu } 13960ce86c7SWei Liu } 14060ce86c7SWei Liu 14160ce86c7SWei Liu return oflags; 14260ce86c7SWei Liu } 14360ce86c7SWei Liu 14460ce86c7SWei Liu void cred_init(FsCred *credp) 14560ce86c7SWei Liu { 14660ce86c7SWei Liu credp->fc_uid = -1; 14760ce86c7SWei Liu credp->fc_gid = -1; 14860ce86c7SWei Liu credp->fc_mode = -1; 14960ce86c7SWei Liu credp->fc_rdev = -1; 15060ce86c7SWei Liu } 15160ce86c7SWei Liu 15260ce86c7SWei Liu static int get_dotl_openflags(V9fsState *s, int oflags) 15360ce86c7SWei Liu { 15460ce86c7SWei Liu int flags; 15560ce86c7SWei Liu /* 15660ce86c7SWei Liu * Filter the client open flags 15760ce86c7SWei Liu */ 15860ce86c7SWei Liu flags = dotl_to_open_flags(oflags); 15960ce86c7SWei Liu flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); 16060ce86c7SWei Liu /* 16160ce86c7SWei Liu * Ignore direct disk access hint until the server supports it. 16260ce86c7SWei Liu */ 16360ce86c7SWei Liu flags &= ~O_DIRECT; 16460ce86c7SWei Liu return flags; 16560ce86c7SWei Liu } 16660ce86c7SWei Liu 16760ce86c7SWei Liu void v9fs_path_init(V9fsPath *path) 16860ce86c7SWei Liu { 16960ce86c7SWei Liu path->data = NULL; 17060ce86c7SWei Liu path->size = 0; 17160ce86c7SWei Liu } 17260ce86c7SWei Liu 17360ce86c7SWei Liu void v9fs_path_free(V9fsPath *path) 17460ce86c7SWei Liu { 17560ce86c7SWei Liu g_free(path->data); 17660ce86c7SWei Liu path->data = NULL; 17760ce86c7SWei Liu path->size = 0; 17860ce86c7SWei Liu } 17960ce86c7SWei Liu 180e3e83f2eSGreg Kurz 181e3e83f2eSGreg Kurz void GCC_FMT_ATTR(2, 3) 182e3e83f2eSGreg Kurz v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) 183e3e83f2eSGreg Kurz { 184e3e83f2eSGreg Kurz va_list ap; 185e3e83f2eSGreg Kurz 186e3e83f2eSGreg Kurz v9fs_path_free(path); 187e3e83f2eSGreg Kurz 188e3e83f2eSGreg Kurz va_start(ap, fmt); 189e3e83f2eSGreg Kurz /* Bump the size for including terminating NULL */ 190e3e83f2eSGreg Kurz path->size = g_vasprintf(&path->data, fmt, ap) + 1; 191e3e83f2eSGreg Kurz va_end(ap); 192e3e83f2eSGreg Kurz } 193e3e83f2eSGreg Kurz 194e446a1ebSMarc-André Lureau void v9fs_path_copy(V9fsPath *dst, const V9fsPath *src) 19560ce86c7SWei Liu { 196e446a1ebSMarc-André Lureau v9fs_path_free(dst); 197e446a1ebSMarc-André Lureau dst->size = src->size; 198e446a1ebSMarc-André Lureau dst->data = g_memdup(src->data, src->size); 19960ce86c7SWei Liu } 20060ce86c7SWei Liu 20160ce86c7SWei Liu int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 20260ce86c7SWei Liu const char *name, V9fsPath *path) 20360ce86c7SWei Liu { 20460ce86c7SWei Liu int err; 20560ce86c7SWei Liu err = s->ops->name_to_path(&s->ctx, dirpath, name, path); 20660ce86c7SWei Liu if (err < 0) { 20760ce86c7SWei Liu err = -errno; 20860ce86c7SWei Liu } 20960ce86c7SWei Liu return err; 21060ce86c7SWei Liu } 21160ce86c7SWei Liu 21260ce86c7SWei Liu /* 21360ce86c7SWei Liu * Return TRUE if s1 is an ancestor of s2. 21460ce86c7SWei Liu * 21560ce86c7SWei Liu * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". 21660ce86c7SWei Liu * As a special case, We treat s1 as ancestor of s2 if they are same! 21760ce86c7SWei Liu */ 21860ce86c7SWei Liu static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) 21960ce86c7SWei Liu { 22060ce86c7SWei Liu if (!strncmp(s1->data, s2->data, s1->size - 1)) { 22160ce86c7SWei Liu if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { 22260ce86c7SWei Liu return 1; 22360ce86c7SWei Liu } 22460ce86c7SWei Liu } 22560ce86c7SWei Liu return 0; 22660ce86c7SWei Liu } 22760ce86c7SWei Liu 22860ce86c7SWei Liu static size_t v9fs_string_size(V9fsString *str) 22960ce86c7SWei Liu { 23060ce86c7SWei Liu return str->size; 23160ce86c7SWei Liu } 23260ce86c7SWei Liu 23360ce86c7SWei Liu /* 23460ce86c7SWei Liu * returns 0 if fid got re-opened, 1 if not, < 0 on error */ 2358440e22eSGreg Kurz static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) 23660ce86c7SWei Liu { 23760ce86c7SWei Liu int err = 1; 23860ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 23960ce86c7SWei Liu if (f->fs.fd == -1) { 24060ce86c7SWei Liu do { 24160ce86c7SWei Liu err = v9fs_co_open(pdu, f, f->open_flags); 24260ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 24360ce86c7SWei Liu } 24460ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 245f314ea4eSGreg Kurz if (f->fs.dir.stream == NULL) { 24660ce86c7SWei Liu do { 24760ce86c7SWei Liu err = v9fs_co_opendir(pdu, f); 24860ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 24960ce86c7SWei Liu } 25060ce86c7SWei Liu } 25160ce86c7SWei Liu return err; 25260ce86c7SWei Liu } 25360ce86c7SWei Liu 2548440e22eSGreg Kurz static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) 25560ce86c7SWei Liu { 25660ce86c7SWei Liu int err; 25760ce86c7SWei Liu V9fsFidState *f; 25860ce86c7SWei Liu V9fsState *s = pdu->s; 25960ce86c7SWei Liu 26060ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 26160ce86c7SWei Liu BUG_ON(f->clunked); 26260ce86c7SWei Liu if (f->fid == fid) { 26360ce86c7SWei Liu /* 26460ce86c7SWei Liu * Update the fid ref upfront so that 26560ce86c7SWei Liu * we don't get reclaimed when we yield 26660ce86c7SWei Liu * in open later. 26760ce86c7SWei Liu */ 26860ce86c7SWei Liu f->ref++; 26960ce86c7SWei Liu /* 27060ce86c7SWei Liu * check whether we need to reopen the 27160ce86c7SWei Liu * file. We might have closed the fd 27260ce86c7SWei Liu * while trying to free up some file 27360ce86c7SWei Liu * descriptors. 27460ce86c7SWei Liu */ 27560ce86c7SWei Liu err = v9fs_reopen_fid(pdu, f); 27660ce86c7SWei Liu if (err < 0) { 27760ce86c7SWei Liu f->ref--; 27860ce86c7SWei Liu return NULL; 27960ce86c7SWei Liu } 28060ce86c7SWei Liu /* 28160ce86c7SWei Liu * Mark the fid as referenced so that the LRU 28260ce86c7SWei Liu * reclaim won't close the file descriptor 28360ce86c7SWei Liu */ 28460ce86c7SWei Liu f->flags |= FID_REFERENCED; 28560ce86c7SWei Liu return f; 28660ce86c7SWei Liu } 28760ce86c7SWei Liu } 28860ce86c7SWei Liu return NULL; 28960ce86c7SWei Liu } 29060ce86c7SWei Liu 29160ce86c7SWei Liu static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) 29260ce86c7SWei Liu { 29360ce86c7SWei Liu V9fsFidState *f; 29460ce86c7SWei Liu 29560ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 29660ce86c7SWei Liu /* If fid is already there return NULL */ 29760ce86c7SWei Liu BUG_ON(f->clunked); 29860ce86c7SWei Liu if (f->fid == fid) { 29960ce86c7SWei Liu return NULL; 30060ce86c7SWei Liu } 30160ce86c7SWei Liu } 30260ce86c7SWei Liu f = g_malloc0(sizeof(V9fsFidState)); 30360ce86c7SWei Liu f->fid = fid; 30460ce86c7SWei Liu f->fid_type = P9_FID_NONE; 30560ce86c7SWei Liu f->ref = 1; 30660ce86c7SWei Liu /* 30760ce86c7SWei Liu * Mark the fid as referenced so that the LRU 30860ce86c7SWei Liu * reclaim won't close the file descriptor 30960ce86c7SWei Liu */ 31060ce86c7SWei Liu f->flags |= FID_REFERENCED; 31160ce86c7SWei Liu f->next = s->fid_list; 31260ce86c7SWei Liu s->fid_list = f; 31360ce86c7SWei Liu 3147cde47d4SGreg Kurz v9fs_readdir_init(&f->fs.dir); 3157cde47d4SGreg Kurz v9fs_readdir_init(&f->fs_reclaim.dir); 3167cde47d4SGreg Kurz 31760ce86c7SWei Liu return f; 31860ce86c7SWei Liu } 31960ce86c7SWei Liu 3208440e22eSGreg Kurz static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) 32160ce86c7SWei Liu { 32260ce86c7SWei Liu int retval = 0; 32360ce86c7SWei Liu 324dd28fbbcSLi Qiang if (fidp->fs.xattr.xattrwalk_fid) { 32560ce86c7SWei Liu /* getxattr/listxattr fid */ 32660ce86c7SWei Liu goto free_value; 32760ce86c7SWei Liu } 32860ce86c7SWei Liu /* 32960ce86c7SWei Liu * if this is fid for setxattr. clunk should 33060ce86c7SWei Liu * result in setxattr localcall 33160ce86c7SWei Liu */ 33260ce86c7SWei Liu if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { 33360ce86c7SWei Liu /* clunk after partial write */ 33460ce86c7SWei Liu retval = -EINVAL; 33560ce86c7SWei Liu goto free_out; 33660ce86c7SWei Liu } 33760ce86c7SWei Liu if (fidp->fs.xattr.len) { 33860ce86c7SWei Liu retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, 33960ce86c7SWei Liu fidp->fs.xattr.value, 34060ce86c7SWei Liu fidp->fs.xattr.len, 34160ce86c7SWei Liu fidp->fs.xattr.flags); 34260ce86c7SWei Liu } else { 34360ce86c7SWei Liu retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); 34460ce86c7SWei Liu } 34560ce86c7SWei Liu free_out: 34660ce86c7SWei Liu v9fs_string_free(&fidp->fs.xattr.name); 34760ce86c7SWei Liu free_value: 34860ce86c7SWei Liu g_free(fidp->fs.xattr.value); 34960ce86c7SWei Liu return retval; 35060ce86c7SWei Liu } 35160ce86c7SWei Liu 3528440e22eSGreg Kurz static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) 35360ce86c7SWei Liu { 35460ce86c7SWei Liu int retval = 0; 35560ce86c7SWei Liu 35660ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 35760ce86c7SWei Liu /* If we reclaimed the fd no need to close */ 35860ce86c7SWei Liu if (fidp->fs.fd != -1) { 35960ce86c7SWei Liu retval = v9fs_co_close(pdu, &fidp->fs); 36060ce86c7SWei Liu } 36160ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_DIR) { 362f314ea4eSGreg Kurz if (fidp->fs.dir.stream != NULL) { 36360ce86c7SWei Liu retval = v9fs_co_closedir(pdu, &fidp->fs); 36460ce86c7SWei Liu } 36560ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 36660ce86c7SWei Liu retval = v9fs_xattr_fid_clunk(pdu, fidp); 36760ce86c7SWei Liu } 36860ce86c7SWei Liu v9fs_path_free(&fidp->path); 36960ce86c7SWei Liu g_free(fidp); 37060ce86c7SWei Liu return retval; 37160ce86c7SWei Liu } 37260ce86c7SWei Liu 3738440e22eSGreg Kurz static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) 37460ce86c7SWei Liu { 37560ce86c7SWei Liu BUG_ON(!fidp->ref); 37660ce86c7SWei Liu fidp->ref--; 37760ce86c7SWei Liu /* 37860ce86c7SWei Liu * Don't free the fid if it is in reclaim list 37960ce86c7SWei Liu */ 38060ce86c7SWei Liu if (!fidp->ref && fidp->clunked) { 38160ce86c7SWei Liu if (fidp->fid == pdu->s->root_fid) { 38260ce86c7SWei Liu /* 38360ce86c7SWei Liu * if the clunked fid is root fid then we 38460ce86c7SWei Liu * have unmounted the fs on the client side. 38560ce86c7SWei Liu * delete the migration blocker. Ideally, this 38660ce86c7SWei Liu * should be hooked to transport close notification 38760ce86c7SWei Liu */ 38860ce86c7SWei Liu if (pdu->s->migration_blocker) { 38960ce86c7SWei Liu migrate_del_blocker(pdu->s->migration_blocker); 39060ce86c7SWei Liu error_free(pdu->s->migration_blocker); 39160ce86c7SWei Liu pdu->s->migration_blocker = NULL; 39260ce86c7SWei Liu } 39360ce86c7SWei Liu } 39460ce86c7SWei Liu return free_fid(pdu, fidp); 39560ce86c7SWei Liu } 39660ce86c7SWei Liu return 0; 39760ce86c7SWei Liu } 39860ce86c7SWei Liu 39960ce86c7SWei Liu static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) 40060ce86c7SWei Liu { 40160ce86c7SWei Liu V9fsFidState **fidpp, *fidp; 40260ce86c7SWei Liu 40360ce86c7SWei Liu for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { 40460ce86c7SWei Liu if ((*fidpp)->fid == fid) { 40560ce86c7SWei Liu break; 40660ce86c7SWei Liu } 40760ce86c7SWei Liu } 40860ce86c7SWei Liu if (*fidpp == NULL) { 40960ce86c7SWei Liu return NULL; 41060ce86c7SWei Liu } 41160ce86c7SWei Liu fidp = *fidpp; 41260ce86c7SWei Liu *fidpp = fidp->next; 41360ce86c7SWei Liu fidp->clunked = 1; 41460ce86c7SWei Liu return fidp; 41560ce86c7SWei Liu } 41660ce86c7SWei Liu 4178440e22eSGreg Kurz void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) 41860ce86c7SWei Liu { 41960ce86c7SWei Liu int reclaim_count = 0; 42060ce86c7SWei Liu V9fsState *s = pdu->s; 42160ce86c7SWei Liu V9fsFidState *f, *reclaim_list = NULL; 42260ce86c7SWei Liu 42360ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 42460ce86c7SWei Liu /* 42560ce86c7SWei Liu * Unlink fids cannot be reclaimed. Check 42660ce86c7SWei Liu * for them and skip them. Also skip fids 42760ce86c7SWei Liu * currently being operated on. 42860ce86c7SWei Liu */ 42960ce86c7SWei Liu if (f->ref || f->flags & FID_NON_RECLAIMABLE) { 43060ce86c7SWei Liu continue; 43160ce86c7SWei Liu } 43260ce86c7SWei Liu /* 43360ce86c7SWei Liu * if it is a recently referenced fid 43460ce86c7SWei Liu * we leave the fid untouched and clear the 43560ce86c7SWei Liu * reference bit. We come back to it later 43660ce86c7SWei Liu * in the next iteration. (a simple LRU without 43760ce86c7SWei Liu * moving list elements around) 43860ce86c7SWei Liu */ 43960ce86c7SWei Liu if (f->flags & FID_REFERENCED) { 44060ce86c7SWei Liu f->flags &= ~FID_REFERENCED; 44160ce86c7SWei Liu continue; 44260ce86c7SWei Liu } 44360ce86c7SWei Liu /* 44460ce86c7SWei Liu * Add fids to reclaim list. 44560ce86c7SWei Liu */ 44660ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 44760ce86c7SWei Liu if (f->fs.fd != -1) { 44860ce86c7SWei Liu /* 44960ce86c7SWei Liu * Up the reference count so that 45060ce86c7SWei Liu * a clunk request won't free this fid 45160ce86c7SWei Liu */ 45260ce86c7SWei Liu f->ref++; 45360ce86c7SWei Liu f->rclm_lst = reclaim_list; 45460ce86c7SWei Liu reclaim_list = f; 45560ce86c7SWei Liu f->fs_reclaim.fd = f->fs.fd; 45660ce86c7SWei Liu f->fs.fd = -1; 45760ce86c7SWei Liu reclaim_count++; 45860ce86c7SWei Liu } 45960ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 460f314ea4eSGreg Kurz if (f->fs.dir.stream != NULL) { 46160ce86c7SWei Liu /* 46260ce86c7SWei Liu * Up the reference count so that 46360ce86c7SWei Liu * a clunk request won't free this fid 46460ce86c7SWei Liu */ 46560ce86c7SWei Liu f->ref++; 46660ce86c7SWei Liu f->rclm_lst = reclaim_list; 46760ce86c7SWei Liu reclaim_list = f; 468f314ea4eSGreg Kurz f->fs_reclaim.dir.stream = f->fs.dir.stream; 469f314ea4eSGreg Kurz f->fs.dir.stream = NULL; 47060ce86c7SWei Liu reclaim_count++; 47160ce86c7SWei Liu } 47260ce86c7SWei Liu } 47360ce86c7SWei Liu if (reclaim_count >= open_fd_rc) { 47460ce86c7SWei Liu break; 47560ce86c7SWei Liu } 47660ce86c7SWei Liu } 47760ce86c7SWei Liu /* 47860ce86c7SWei Liu * Now close the fid in reclaim list. Free them if they 47960ce86c7SWei Liu * are already clunked. 48060ce86c7SWei Liu */ 48160ce86c7SWei Liu while (reclaim_list) { 48260ce86c7SWei Liu f = reclaim_list; 48360ce86c7SWei Liu reclaim_list = f->rclm_lst; 48460ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 48560ce86c7SWei Liu v9fs_co_close(pdu, &f->fs_reclaim); 48660ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 48760ce86c7SWei Liu v9fs_co_closedir(pdu, &f->fs_reclaim); 48860ce86c7SWei Liu } 48960ce86c7SWei Liu f->rclm_lst = NULL; 49060ce86c7SWei Liu /* 49160ce86c7SWei Liu * Now drop the fid reference, free it 49260ce86c7SWei Liu * if clunked. 49360ce86c7SWei Liu */ 49460ce86c7SWei Liu put_fid(pdu, f); 49560ce86c7SWei Liu } 49660ce86c7SWei Liu } 49760ce86c7SWei Liu 4988440e22eSGreg Kurz static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) 49960ce86c7SWei Liu { 50060ce86c7SWei Liu int err; 50160ce86c7SWei Liu V9fsState *s = pdu->s; 50260ce86c7SWei Liu V9fsFidState *fidp, head_fid; 50360ce86c7SWei Liu 50460ce86c7SWei Liu head_fid.next = s->fid_list; 50560ce86c7SWei Liu for (fidp = s->fid_list; fidp; fidp = fidp->next) { 50660ce86c7SWei Liu if (fidp->path.size != path->size) { 50760ce86c7SWei Liu continue; 50860ce86c7SWei Liu } 50960ce86c7SWei Liu if (!memcmp(fidp->path.data, path->data, path->size)) { 51060ce86c7SWei Liu /* Mark the fid non reclaimable. */ 51160ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 51260ce86c7SWei Liu 51360ce86c7SWei Liu /* reopen the file/dir if already closed */ 51460ce86c7SWei Liu err = v9fs_reopen_fid(pdu, fidp); 51560ce86c7SWei Liu if (err < 0) { 516267fcadfSGreg Kurz return err; 51760ce86c7SWei Liu } 51860ce86c7SWei Liu /* 51960ce86c7SWei Liu * Go back to head of fid list because 52060ce86c7SWei Liu * the list could have got updated when 52160ce86c7SWei Liu * switched to the worker thread 52260ce86c7SWei Liu */ 52360ce86c7SWei Liu if (err == 0) { 52460ce86c7SWei Liu fidp = &head_fid; 52560ce86c7SWei Liu } 52660ce86c7SWei Liu } 52760ce86c7SWei Liu } 52860ce86c7SWei Liu return 0; 52960ce86c7SWei Liu } 53060ce86c7SWei Liu 5318440e22eSGreg Kurz static void coroutine_fn virtfs_reset(V9fsPDU *pdu) 53260ce86c7SWei Liu { 53360ce86c7SWei Liu V9fsState *s = pdu->s; 53479decce3SGreg Kurz V9fsFidState *fidp; 53560ce86c7SWei Liu 53660ce86c7SWei Liu /* Free all fids */ 53760ce86c7SWei Liu while (s->fid_list) { 5386d54af0eSGreg Kurz /* Get fid */ 53960ce86c7SWei Liu fidp = s->fid_list; 5406d54af0eSGreg Kurz fidp->ref++; 54160ce86c7SWei Liu 5426d54af0eSGreg Kurz /* Clunk fid */ 5436d54af0eSGreg Kurz s->fid_list = fidp->next; 54460ce86c7SWei Liu fidp->clunked = 1; 5456d54af0eSGreg Kurz 5466d54af0eSGreg Kurz put_fid(pdu, fidp); 54760ce86c7SWei Liu } 54860ce86c7SWei Liu } 54960ce86c7SWei Liu 55060ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 55160ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 55260ce86c7SWei Liu 55360ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 55460ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 55560ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 55660ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 55760ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 55860ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 55960ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 56060ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 56160ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 56260ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 56360ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 56460ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 56560ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 56660ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 56760ce86c7SWei Liu 56860ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 56960ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 57060ce86c7SWei Liu P9_STAT_MODE_LINK | \ 57160ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 57260ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 57360ce86c7SWei Liu P9_STAT_MODE_SOCKET) 57460ce86c7SWei Liu 57560ce86c7SWei Liu /* This is the algorithm from ufs in spfs */ 576*3b5ee9e8SAntonios Motakis static int stat_to_qid(V9fsPDU *pdu, const struct stat *stbuf, V9fsQID *qidp) 57760ce86c7SWei Liu { 57860ce86c7SWei Liu size_t size; 57960ce86c7SWei Liu 580*3b5ee9e8SAntonios Motakis if (pdu->s->dev_id != stbuf->st_dev) { 581*3b5ee9e8SAntonios Motakis warn_report_once( 582*3b5ee9e8SAntonios Motakis "9p: Multiple devices detected in same VirtFS export, " 583*3b5ee9e8SAntonios Motakis "which might lead to file ID collisions and severe " 584*3b5ee9e8SAntonios Motakis "misbehaviours on guest! You should use a separate " 585*3b5ee9e8SAntonios Motakis "export for each device shared from host." 586*3b5ee9e8SAntonios Motakis ); 587*3b5ee9e8SAntonios Motakis } 588*3b5ee9e8SAntonios Motakis 58960ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 59060ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 59160ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 59260ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 59360ce86c7SWei Liu qidp->type = 0; 59460ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 59560ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 59660ce86c7SWei Liu } 59760ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 59860ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 59960ce86c7SWei Liu } 600*3b5ee9e8SAntonios Motakis 601*3b5ee9e8SAntonios Motakis return 0; 60260ce86c7SWei Liu } 60360ce86c7SWei Liu 6048440e22eSGreg Kurz static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 6058440e22eSGreg Kurz V9fsQID *qidp) 60660ce86c7SWei Liu { 60760ce86c7SWei Liu struct stat stbuf; 60860ce86c7SWei Liu int err; 60960ce86c7SWei Liu 61060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 61160ce86c7SWei Liu if (err < 0) { 61260ce86c7SWei Liu return err; 61360ce86c7SWei Liu } 614*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, qidp); 615*3b5ee9e8SAntonios Motakis if (err < 0) { 616*3b5ee9e8SAntonios Motakis return err; 617*3b5ee9e8SAntonios Motakis } 61860ce86c7SWei Liu return 0; 61960ce86c7SWei Liu } 62060ce86c7SWei Liu 62160ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 62260ce86c7SWei Liu { 62360ce86c7SWei Liu V9fsPDU *pdu = NULL; 62460ce86c7SWei Liu 62560ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 62660ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 62760ce86c7SWei Liu QLIST_REMOVE(pdu, next); 62860ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 62960ce86c7SWei Liu } 63060ce86c7SWei Liu return pdu; 63160ce86c7SWei Liu } 63260ce86c7SWei Liu 63360ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 63460ce86c7SWei Liu { 63560ce86c7SWei Liu V9fsState *s = pdu->s; 636f74e27bfSGreg Kurz 637f74e27bfSGreg Kurz g_assert(!pdu->cancelled); 63860ce86c7SWei Liu QLIST_REMOVE(pdu, next); 63960ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 64060ce86c7SWei Liu } 64160ce86c7SWei Liu 6428440e22eSGreg Kurz static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) 64360ce86c7SWei Liu { 64460ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 64560ce86c7SWei Liu V9fsState *s = pdu->s; 64606a37db7SGreg Kurz int ret; 64760ce86c7SWei Liu 648fc78d5eeSKeno Fischer /* 649fc78d5eeSKeno Fischer * The 9p spec requires that successfully cancelled pdus receive no reply. 650fc78d5eeSKeno Fischer * Sending a reply would confuse clients because they would 651fc78d5eeSKeno Fischer * assume that any EINTR is the actual result of the operation, 652fc78d5eeSKeno Fischer * rather than a consequence of the cancellation. However, if 653fc78d5eeSKeno Fischer * the operation completed (succesfully or with an error other 654fc78d5eeSKeno Fischer * than caused be cancellation), we do send out that reply, both 655fc78d5eeSKeno Fischer * for efficiency and to avoid confusing the rest of the state machine 656fc78d5eeSKeno Fischer * that assumes passing a non-error here will mean a successful 657fc78d5eeSKeno Fischer * transmission of the reply. 658fc78d5eeSKeno Fischer */ 659fc78d5eeSKeno Fischer bool discard = pdu->cancelled && len == -EINTR; 660fc78d5eeSKeno Fischer if (discard) { 661fc78d5eeSKeno Fischer trace_v9fs_rcancel(pdu->tag, pdu->id); 662fc78d5eeSKeno Fischer pdu->size = 0; 663fc78d5eeSKeno Fischer goto out_notify; 664fc78d5eeSKeno Fischer } 665fc78d5eeSKeno Fischer 66660ce86c7SWei Liu if (len < 0) { 66760ce86c7SWei Liu int err = -len; 66860ce86c7SWei Liu len = 7; 66960ce86c7SWei Liu 67060ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 67160ce86c7SWei Liu V9fsString str; 67260ce86c7SWei Liu 67360ce86c7SWei Liu str.data = strerror(err); 67460ce86c7SWei Liu str.size = strlen(str.data); 67560ce86c7SWei Liu 67606a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "s", &str); 67706a37db7SGreg Kurz if (ret < 0) { 67806a37db7SGreg Kurz goto out_notify; 67906a37db7SGreg Kurz } 68006a37db7SGreg Kurz len += ret; 68160ce86c7SWei Liu id = P9_RERROR; 68260ce86c7SWei Liu } 68360ce86c7SWei Liu 68406a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "d", err); 68506a37db7SGreg Kurz if (ret < 0) { 68606a37db7SGreg Kurz goto out_notify; 68706a37db7SGreg Kurz } 68806a37db7SGreg Kurz len += ret; 68960ce86c7SWei Liu 69060ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 69160ce86c7SWei Liu id = P9_RLERROR; 69260ce86c7SWei Liu } 69360ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 69460ce86c7SWei Liu } 69560ce86c7SWei Liu 69660ce86c7SWei Liu /* fill out the header */ 69706a37db7SGreg Kurz if (pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag) < 0) { 69806a37db7SGreg Kurz goto out_notify; 69906a37db7SGreg Kurz } 70060ce86c7SWei Liu 70160ce86c7SWei Liu /* keep these in sync */ 70260ce86c7SWei Liu pdu->size = len; 70360ce86c7SWei Liu pdu->id = id; 70460ce86c7SWei Liu 70506a37db7SGreg Kurz out_notify: 706a17d8659SGreg Kurz pdu->s->transport->push_and_notify(pdu); 70760ce86c7SWei Liu 70860ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 709f74e27bfSGreg Kurz if (!qemu_co_queue_next(&pdu->complete)) { 71060ce86c7SWei Liu pdu_free(pdu); 71160ce86c7SWei Liu } 712f74e27bfSGreg Kurz } 71360ce86c7SWei Liu 71460ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 71560ce86c7SWei Liu { 71660ce86c7SWei Liu mode_t ret; 71760ce86c7SWei Liu 71860ce86c7SWei Liu ret = mode & 0777; 71960ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 72060ce86c7SWei Liu ret |= S_IFDIR; 72160ce86c7SWei Liu } 72260ce86c7SWei Liu 72360ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 72460ce86c7SWei Liu ret |= S_IFLNK; 72560ce86c7SWei Liu } 72660ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 72760ce86c7SWei Liu ret |= S_IFSOCK; 72860ce86c7SWei Liu } 72960ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 73060ce86c7SWei Liu ret |= S_IFIFO; 73160ce86c7SWei Liu } 73260ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 73360ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 73460ce86c7SWei Liu ret |= S_IFCHR; 73560ce86c7SWei Liu } else { 73660ce86c7SWei Liu ret |= S_IFBLK; 73760ce86c7SWei Liu } 73860ce86c7SWei Liu } 73960ce86c7SWei Liu 74060ce86c7SWei Liu if (!(ret&~0777)) { 74160ce86c7SWei Liu ret |= S_IFREG; 74260ce86c7SWei Liu } 74360ce86c7SWei Liu 74460ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 74560ce86c7SWei Liu ret |= S_ISUID; 74660ce86c7SWei Liu } 74760ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 74860ce86c7SWei Liu ret |= S_ISGID; 74960ce86c7SWei Liu } 75060ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 75160ce86c7SWei Liu ret |= S_ISVTX; 75260ce86c7SWei Liu } 75360ce86c7SWei Liu 75460ce86c7SWei Liu return ret; 75560ce86c7SWei Liu } 75660ce86c7SWei Liu 75760ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 75860ce86c7SWei Liu { 75960ce86c7SWei Liu if (stat->type == -1 && 76060ce86c7SWei Liu stat->dev == -1 && 76187032833SAntonios Motakis stat->qid.type == 0xff && 76287032833SAntonios Motakis stat->qid.version == (uint32_t) -1 && 76387032833SAntonios Motakis stat->qid.path == (uint64_t) -1 && 76460ce86c7SWei Liu stat->mode == -1 && 76560ce86c7SWei Liu stat->atime == -1 && 76660ce86c7SWei Liu stat->mtime == -1 && 76760ce86c7SWei Liu stat->length == -1 && 76860ce86c7SWei Liu !stat->name.size && 76960ce86c7SWei Liu !stat->uid.size && 77060ce86c7SWei Liu !stat->gid.size && 77160ce86c7SWei Liu !stat->muid.size && 77260ce86c7SWei Liu stat->n_uid == -1 && 77360ce86c7SWei Liu stat->n_gid == -1 && 77460ce86c7SWei Liu stat->n_muid == -1) { 77560ce86c7SWei Liu return 1; 77660ce86c7SWei Liu } 77760ce86c7SWei Liu 77860ce86c7SWei Liu return 0; 77960ce86c7SWei Liu } 78060ce86c7SWei Liu 78160ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 78260ce86c7SWei Liu { 78360ce86c7SWei Liu v9fs_string_init(&stat->name); 78460ce86c7SWei Liu v9fs_string_init(&stat->uid); 78560ce86c7SWei Liu v9fs_string_init(&stat->gid); 78660ce86c7SWei Liu v9fs_string_init(&stat->muid); 78760ce86c7SWei Liu v9fs_string_init(&stat->extension); 78860ce86c7SWei Liu } 78960ce86c7SWei Liu 79060ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 79160ce86c7SWei Liu { 79260ce86c7SWei Liu v9fs_string_free(&stat->name); 79360ce86c7SWei Liu v9fs_string_free(&stat->uid); 79460ce86c7SWei Liu v9fs_string_free(&stat->gid); 79560ce86c7SWei Liu v9fs_string_free(&stat->muid); 79660ce86c7SWei Liu v9fs_string_free(&stat->extension); 79760ce86c7SWei Liu } 79860ce86c7SWei Liu 79960ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 80060ce86c7SWei Liu { 80160ce86c7SWei Liu uint32_t mode; 80260ce86c7SWei Liu 80360ce86c7SWei Liu mode = stbuf->st_mode & 0777; 80460ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 80560ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 80660ce86c7SWei Liu } 80760ce86c7SWei Liu 80860ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 80960ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 81060ce86c7SWei Liu } 81160ce86c7SWei Liu 81260ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 81360ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 81460ce86c7SWei Liu } 81560ce86c7SWei Liu 81660ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 81760ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 81860ce86c7SWei Liu } 81960ce86c7SWei Liu 82060ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 82160ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 82260ce86c7SWei Liu } 82360ce86c7SWei Liu 82460ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 82560ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 82660ce86c7SWei Liu } 82760ce86c7SWei Liu 82860ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 82960ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 83060ce86c7SWei Liu } 83160ce86c7SWei Liu 83260ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 83360ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 83460ce86c7SWei Liu } 83560ce86c7SWei Liu 83660ce86c7SWei Liu return mode; 83760ce86c7SWei Liu } 83860ce86c7SWei Liu 8396069537fSJan Dakinevich static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *path, 8406069537fSJan Dakinevich const char *basename, 84160ce86c7SWei Liu const struct stat *stbuf, 84260ce86c7SWei Liu V9fsStat *v9stat) 84360ce86c7SWei Liu { 84460ce86c7SWei Liu int err; 84560ce86c7SWei Liu 84660ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 84760ce86c7SWei Liu 848*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, stbuf, &v9stat->qid); 849*3b5ee9e8SAntonios Motakis if (err < 0) { 850*3b5ee9e8SAntonios Motakis return err; 851*3b5ee9e8SAntonios Motakis } 85260ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 85360ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 85460ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 85560ce86c7SWei Liu v9stat->length = stbuf->st_size; 85660ce86c7SWei Liu 857abdf0086SGreg Kurz v9fs_string_free(&v9stat->uid); 858abdf0086SGreg Kurz v9fs_string_free(&v9stat->gid); 859abdf0086SGreg Kurz v9fs_string_free(&v9stat->muid); 86060ce86c7SWei Liu 86160ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 86260ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 86360ce86c7SWei Liu v9stat->n_muid = 0; 86460ce86c7SWei Liu 865abdf0086SGreg Kurz v9fs_string_free(&v9stat->extension); 86660ce86c7SWei Liu 86760ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 8686069537fSJan Dakinevich err = v9fs_co_readlink(pdu, path, &v9stat->extension); 86960ce86c7SWei Liu if (err < 0) { 87060ce86c7SWei Liu return err; 87160ce86c7SWei Liu } 87260ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 87360ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 87460ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 87560ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 87660ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 87760ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 87860ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 87960ce86c7SWei Liu } 88060ce86c7SWei Liu 8816069537fSJan Dakinevich v9fs_string_sprintf(&v9stat->name, "%s", basename); 88260ce86c7SWei Liu 88360ce86c7SWei Liu v9stat->size = 61 + 88460ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 88560ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 88660ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 88760ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 88860ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 88960ce86c7SWei Liu return 0; 89060ce86c7SWei Liu } 89160ce86c7SWei Liu 89260ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 89360ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 89460ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 89560ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 89660ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 89760ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 89860ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 89960ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 90060ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 90160ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 90260ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 90360ce86c7SWei Liu 90460ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 90560ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 90660ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 90760ce86c7SWei Liu 90860ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 90960ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 91060ce86c7SWei Liu 91160ce86c7SWei Liu 912*3b5ee9e8SAntonios Motakis static int stat_to_v9stat_dotl(V9fsPDU *pdu, const struct stat *stbuf, 91360ce86c7SWei Liu V9fsStatDotl *v9lstat) 91460ce86c7SWei Liu { 91560ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 91660ce86c7SWei Liu 91760ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 91860ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 91960ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 92060ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 92160ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 92260ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 92360ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 92460ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 92560ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 92660ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 92760ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 92860ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 92960ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 93060ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 93160ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 93260ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 93360ce86c7SWei Liu 934*3b5ee9e8SAntonios Motakis return stat_to_qid(pdu, stbuf, &v9lstat->qid); 93560ce86c7SWei Liu } 93660ce86c7SWei Liu 93760ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 93860ce86c7SWei Liu { 93960ce86c7SWei Liu int i; 94060ce86c7SWei Liu 94160ce86c7SWei Liu printf("sg[%d]: {", cnt); 94260ce86c7SWei Liu for (i = 0; i < cnt; i++) { 94360ce86c7SWei Liu if (i) { 94460ce86c7SWei Liu printf(", "); 94560ce86c7SWei Liu } 94660ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 94760ce86c7SWei Liu } 94860ce86c7SWei Liu printf("}\n"); 94960ce86c7SWei Liu } 95060ce86c7SWei Liu 95160ce86c7SWei Liu /* Will call this only for path name based fid */ 95260ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 95360ce86c7SWei Liu { 95460ce86c7SWei Liu V9fsPath str; 95560ce86c7SWei Liu v9fs_path_init(&str); 95660ce86c7SWei Liu v9fs_path_copy(&str, dst); 957e3e83f2eSGreg Kurz v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); 95860ce86c7SWei Liu v9fs_path_free(&str); 95960ce86c7SWei Liu } 96060ce86c7SWei Liu 96160ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 96260ce86c7SWei Liu { 96360ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 96460ce86c7SWei Liu } 96560ce86c7SWei Liu 9668440e22eSGreg Kurz static void coroutine_fn v9fs_version(void *opaque) 96760ce86c7SWei Liu { 96860ce86c7SWei Liu ssize_t err; 96960ce86c7SWei Liu V9fsPDU *pdu = opaque; 97060ce86c7SWei Liu V9fsState *s = pdu->s; 97160ce86c7SWei Liu V9fsString version; 97260ce86c7SWei Liu size_t offset = 7; 97360ce86c7SWei Liu 97460ce86c7SWei Liu v9fs_string_init(&version); 97560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 97660ce86c7SWei Liu if (err < 0) { 97760ce86c7SWei Liu goto out; 97860ce86c7SWei Liu } 97960ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 98060ce86c7SWei Liu 98160ce86c7SWei Liu virtfs_reset(pdu); 98260ce86c7SWei Liu 98360ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 98460ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 98560ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 98660ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 98760ce86c7SWei Liu } else { 98860ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 98960ce86c7SWei Liu } 99060ce86c7SWei Liu 99160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 99260ce86c7SWei Liu if (err < 0) { 99360ce86c7SWei Liu goto out; 99460ce86c7SWei Liu } 995403a905bSPhilippe Mathieu-Daudé err += offset; 99660ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 99760ce86c7SWei Liu out: 998403a905bSPhilippe Mathieu-Daudé pdu_complete(pdu, err); 99960ce86c7SWei Liu v9fs_string_free(&version); 100060ce86c7SWei Liu } 100160ce86c7SWei Liu 10028440e22eSGreg Kurz static void coroutine_fn v9fs_attach(void *opaque) 100360ce86c7SWei Liu { 100460ce86c7SWei Liu V9fsPDU *pdu = opaque; 100560ce86c7SWei Liu V9fsState *s = pdu->s; 100660ce86c7SWei Liu int32_t fid, afid, n_uname; 100760ce86c7SWei Liu V9fsString uname, aname; 100860ce86c7SWei Liu V9fsFidState *fidp; 100960ce86c7SWei Liu size_t offset = 7; 101060ce86c7SWei Liu V9fsQID qid; 101160ce86c7SWei Liu ssize_t err; 1012fe44dc91SAshijeet Acharya Error *local_err = NULL; 101360ce86c7SWei Liu 101460ce86c7SWei Liu v9fs_string_init(&uname); 101560ce86c7SWei Liu v9fs_string_init(&aname); 101660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 101760ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 101860ce86c7SWei Liu if (err < 0) { 101960ce86c7SWei Liu goto out_nofid; 102060ce86c7SWei Liu } 102160ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 102260ce86c7SWei Liu 102360ce86c7SWei Liu fidp = alloc_fid(s, fid); 102460ce86c7SWei Liu if (fidp == NULL) { 102560ce86c7SWei Liu err = -EINVAL; 102660ce86c7SWei Liu goto out_nofid; 102760ce86c7SWei Liu } 102860ce86c7SWei Liu fidp->uid = n_uname; 102960ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 103060ce86c7SWei Liu if (err < 0) { 103160ce86c7SWei Liu err = -EINVAL; 103260ce86c7SWei Liu clunk_fid(s, fid); 103360ce86c7SWei Liu goto out; 103460ce86c7SWei Liu } 103560ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 103660ce86c7SWei Liu if (err < 0) { 103760ce86c7SWei Liu err = -EINVAL; 103860ce86c7SWei Liu clunk_fid(s, fid); 103960ce86c7SWei Liu goto out; 104060ce86c7SWei Liu } 1041fe44dc91SAshijeet Acharya 1042fe44dc91SAshijeet Acharya /* 1043fe44dc91SAshijeet Acharya * disable migration if we haven't done already. 1044fe44dc91SAshijeet Acharya * attach could get called multiple times for the same export. 1045fe44dc91SAshijeet Acharya */ 1046fe44dc91SAshijeet Acharya if (!s->migration_blocker) { 1047fe44dc91SAshijeet Acharya error_setg(&s->migration_blocker, 1048fe44dc91SAshijeet Acharya "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 1049fe44dc91SAshijeet Acharya s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 1050fe44dc91SAshijeet Acharya err = migrate_add_blocker(s->migration_blocker, &local_err); 1051fe44dc91SAshijeet Acharya if (local_err) { 1052fe44dc91SAshijeet Acharya error_free(local_err); 1053fe44dc91SAshijeet Acharya error_free(s->migration_blocker); 1054fe44dc91SAshijeet Acharya s->migration_blocker = NULL; 1055fe44dc91SAshijeet Acharya clunk_fid(s, fid); 1056fe44dc91SAshijeet Acharya goto out; 1057fe44dc91SAshijeet Acharya } 1058fe44dc91SAshijeet Acharya s->root_fid = fid; 1059fe44dc91SAshijeet Acharya } 1060fe44dc91SAshijeet Acharya 106160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 106260ce86c7SWei Liu if (err < 0) { 106360ce86c7SWei Liu clunk_fid(s, fid); 106460ce86c7SWei Liu goto out; 106560ce86c7SWei Liu } 106660ce86c7SWei Liu err += offset; 1067fe44dc91SAshijeet Acharya 106856f101ecSGreg Kurz memcpy(&s->root_qid, &qid, sizeof(qid)); 106960ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 107060ce86c7SWei Liu qid.type, qid.version, qid.path); 107160ce86c7SWei Liu out: 107260ce86c7SWei Liu put_fid(pdu, fidp); 107360ce86c7SWei Liu out_nofid: 107460ce86c7SWei Liu pdu_complete(pdu, err); 107560ce86c7SWei Liu v9fs_string_free(&uname); 107660ce86c7SWei Liu v9fs_string_free(&aname); 107760ce86c7SWei Liu } 107860ce86c7SWei Liu 10798440e22eSGreg Kurz static void coroutine_fn v9fs_stat(void *opaque) 108060ce86c7SWei Liu { 108160ce86c7SWei Liu int32_t fid; 108260ce86c7SWei Liu V9fsStat v9stat; 108360ce86c7SWei Liu ssize_t err = 0; 108460ce86c7SWei Liu size_t offset = 7; 108560ce86c7SWei Liu struct stat stbuf; 108660ce86c7SWei Liu V9fsFidState *fidp; 108760ce86c7SWei Liu V9fsPDU *pdu = opaque; 10886069537fSJan Dakinevich char *basename; 108960ce86c7SWei Liu 109060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 109160ce86c7SWei Liu if (err < 0) { 109260ce86c7SWei Liu goto out_nofid; 109360ce86c7SWei Liu } 109460ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 109560ce86c7SWei Liu 109660ce86c7SWei Liu fidp = get_fid(pdu, fid); 109760ce86c7SWei Liu if (fidp == NULL) { 109860ce86c7SWei Liu err = -ENOENT; 109960ce86c7SWei Liu goto out_nofid; 110060ce86c7SWei Liu } 110160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 110260ce86c7SWei Liu if (err < 0) { 110360ce86c7SWei Liu goto out; 110460ce86c7SWei Liu } 11056069537fSJan Dakinevich basename = g_path_get_basename(fidp->path.data); 11066069537fSJan Dakinevich err = stat_to_v9stat(pdu, &fidp->path, basename, &stbuf, &v9stat); 11076069537fSJan Dakinevich g_free(basename); 110860ce86c7SWei Liu if (err < 0) { 110960ce86c7SWei Liu goto out; 111060ce86c7SWei Liu } 111160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 111260ce86c7SWei Liu if (err < 0) { 111360ce86c7SWei Liu v9fs_stat_free(&v9stat); 111460ce86c7SWei Liu goto out; 111560ce86c7SWei Liu } 111660ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 111760ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 111860ce86c7SWei Liu err += offset; 111960ce86c7SWei Liu v9fs_stat_free(&v9stat); 112060ce86c7SWei Liu out: 112160ce86c7SWei Liu put_fid(pdu, fidp); 112260ce86c7SWei Liu out_nofid: 112360ce86c7SWei Liu pdu_complete(pdu, err); 112460ce86c7SWei Liu } 112560ce86c7SWei Liu 11268440e22eSGreg Kurz static void coroutine_fn v9fs_getattr(void *opaque) 112760ce86c7SWei Liu { 112860ce86c7SWei Liu int32_t fid; 112960ce86c7SWei Liu size_t offset = 7; 113060ce86c7SWei Liu ssize_t retval = 0; 113160ce86c7SWei Liu struct stat stbuf; 113260ce86c7SWei Liu V9fsFidState *fidp; 113360ce86c7SWei Liu uint64_t request_mask; 113460ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 113560ce86c7SWei Liu V9fsPDU *pdu = opaque; 113660ce86c7SWei Liu 113760ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 113860ce86c7SWei Liu if (retval < 0) { 113960ce86c7SWei Liu goto out_nofid; 114060ce86c7SWei Liu } 114160ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 114260ce86c7SWei Liu 114360ce86c7SWei Liu fidp = get_fid(pdu, fid); 114460ce86c7SWei Liu if (fidp == NULL) { 114560ce86c7SWei Liu retval = -ENOENT; 114660ce86c7SWei Liu goto out_nofid; 114760ce86c7SWei Liu } 114860ce86c7SWei Liu /* 114960ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 115060ce86c7SWei Liu * need to look at request_mask. 115160ce86c7SWei Liu */ 115260ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 115360ce86c7SWei Liu if (retval < 0) { 115460ce86c7SWei Liu goto out; 115560ce86c7SWei Liu } 1156*3b5ee9e8SAntonios Motakis retval = stat_to_v9stat_dotl(pdu, &stbuf, &v9stat_dotl); 1157*3b5ee9e8SAntonios Motakis if (retval < 0) { 1158*3b5ee9e8SAntonios Motakis goto out; 1159*3b5ee9e8SAntonios Motakis } 116060ce86c7SWei Liu 116160ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 116260ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 116360ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 116460ce86c7SWei Liu switch (retval) { 116560ce86c7SWei Liu case 0: 116660ce86c7SWei Liu /* we have valid st_gen: update result mask */ 116760ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 116860ce86c7SWei Liu break; 116960ce86c7SWei Liu case -EINTR: 117060ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 117160ce86c7SWei Liu goto out; 117260ce86c7SWei Liu default: 117360ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 117460ce86c7SWei Liu break; 117560ce86c7SWei Liu } 117660ce86c7SWei Liu } 117760ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 117860ce86c7SWei Liu if (retval < 0) { 117960ce86c7SWei Liu goto out; 118060ce86c7SWei Liu } 118160ce86c7SWei Liu retval += offset; 118260ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 118360ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 118460ce86c7SWei Liu v9stat_dotl.st_gid); 118560ce86c7SWei Liu out: 118660ce86c7SWei Liu put_fid(pdu, fidp); 118760ce86c7SWei Liu out_nofid: 118860ce86c7SWei Liu pdu_complete(pdu, retval); 118960ce86c7SWei Liu } 119060ce86c7SWei Liu 119160ce86c7SWei Liu /* Attribute flags */ 119260ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 119360ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 119460ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 119560ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 119660ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 119760ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 119860ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 119960ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 120060ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 120160ce86c7SWei Liu 120260ce86c7SWei Liu #define P9_ATTR_MASK 127 120360ce86c7SWei Liu 12048440e22eSGreg Kurz static void coroutine_fn v9fs_setattr(void *opaque) 120560ce86c7SWei Liu { 120660ce86c7SWei Liu int err = 0; 120760ce86c7SWei Liu int32_t fid; 120860ce86c7SWei Liu V9fsFidState *fidp; 120960ce86c7SWei Liu size_t offset = 7; 121060ce86c7SWei Liu V9fsIattr v9iattr; 121160ce86c7SWei Liu V9fsPDU *pdu = opaque; 121260ce86c7SWei Liu 121360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 121460ce86c7SWei Liu if (err < 0) { 121560ce86c7SWei Liu goto out_nofid; 121660ce86c7SWei Liu } 121760ce86c7SWei Liu 12188f9c64bfSGreg Kurz trace_v9fs_setattr(pdu->tag, pdu->id, fid, 12198f9c64bfSGreg Kurz v9iattr.valid, v9iattr.mode, v9iattr.uid, v9iattr.gid, 12208f9c64bfSGreg Kurz v9iattr.size, v9iattr.atime_sec, v9iattr.mtime_sec); 12218f9c64bfSGreg Kurz 122260ce86c7SWei Liu fidp = get_fid(pdu, fid); 122360ce86c7SWei Liu if (fidp == NULL) { 122460ce86c7SWei Liu err = -EINVAL; 122560ce86c7SWei Liu goto out_nofid; 122660ce86c7SWei Liu } 122760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 122860ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 122960ce86c7SWei Liu if (err < 0) { 123060ce86c7SWei Liu goto out; 123160ce86c7SWei Liu } 123260ce86c7SWei Liu } 123360ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 123460ce86c7SWei Liu struct timespec times[2]; 123560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 123660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 123760ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 123860ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 123960ce86c7SWei Liu } else { 124060ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 124160ce86c7SWei Liu } 124260ce86c7SWei Liu } else { 124360ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 124460ce86c7SWei Liu } 124560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 124660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 124760ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 124860ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 124960ce86c7SWei Liu } else { 125060ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 125160ce86c7SWei Liu } 125260ce86c7SWei Liu } else { 125360ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 125460ce86c7SWei Liu } 125560ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 125660ce86c7SWei Liu if (err < 0) { 125760ce86c7SWei Liu goto out; 125860ce86c7SWei Liu } 125960ce86c7SWei Liu } 126060ce86c7SWei Liu /* 126160ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 126260ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 126360ce86c7SWei Liu */ 126460ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 126560ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 126660ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 126760ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 126860ce86c7SWei Liu v9iattr.uid = -1; 126960ce86c7SWei Liu } 127060ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 127160ce86c7SWei Liu v9iattr.gid = -1; 127260ce86c7SWei Liu } 127360ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 127460ce86c7SWei Liu v9iattr.gid); 127560ce86c7SWei Liu if (err < 0) { 127660ce86c7SWei Liu goto out; 127760ce86c7SWei Liu } 127860ce86c7SWei Liu } 127960ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 128060ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 128160ce86c7SWei Liu if (err < 0) { 128260ce86c7SWei Liu goto out; 128360ce86c7SWei Liu } 128460ce86c7SWei Liu } 128560ce86c7SWei Liu err = offset; 12868f9c64bfSGreg Kurz trace_v9fs_setattr_return(pdu->tag, pdu->id); 128760ce86c7SWei Liu out: 128860ce86c7SWei Liu put_fid(pdu, fidp); 128960ce86c7SWei Liu out_nofid: 129060ce86c7SWei Liu pdu_complete(pdu, err); 129160ce86c7SWei Liu } 129260ce86c7SWei Liu 129360ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 129460ce86c7SWei Liu { 129560ce86c7SWei Liu int i; 129660ce86c7SWei Liu ssize_t err; 129760ce86c7SWei Liu size_t offset = 7; 129860ce86c7SWei Liu 129960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 130060ce86c7SWei Liu if (err < 0) { 130160ce86c7SWei Liu return err; 130260ce86c7SWei Liu } 130360ce86c7SWei Liu offset += err; 130460ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 130560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 130660ce86c7SWei Liu if (err < 0) { 130760ce86c7SWei Liu return err; 130860ce86c7SWei Liu } 130960ce86c7SWei Liu offset += err; 131060ce86c7SWei Liu } 131160ce86c7SWei Liu return offset; 131260ce86c7SWei Liu } 131360ce86c7SWei Liu 1314fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1315fff39a7aSGreg Kurz { 1316fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1317fff39a7aSGreg Kurz } 1318fff39a7aSGreg Kurz 131956f101ecSGreg Kurz static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) 132056f101ecSGreg Kurz { 132156f101ecSGreg Kurz return 132256f101ecSGreg Kurz qid1->type != qid2->type || 132356f101ecSGreg Kurz qid1->version != qid2->version || 132456f101ecSGreg Kurz qid1->path != qid2->path; 132556f101ecSGreg Kurz } 132656f101ecSGreg Kurz 13278440e22eSGreg Kurz static void coroutine_fn v9fs_walk(void *opaque) 132860ce86c7SWei Liu { 132960ce86c7SWei Liu int name_idx; 133060ce86c7SWei Liu V9fsQID *qids = NULL; 133160ce86c7SWei Liu int i, err = 0; 133260ce86c7SWei Liu V9fsPath dpath, path; 133360ce86c7SWei Liu uint16_t nwnames; 133460ce86c7SWei Liu struct stat stbuf; 133560ce86c7SWei Liu size_t offset = 7; 133660ce86c7SWei Liu int32_t fid, newfid; 133760ce86c7SWei Liu V9fsString *wnames = NULL; 133860ce86c7SWei Liu V9fsFidState *fidp; 133960ce86c7SWei Liu V9fsFidState *newfidp = NULL; 134060ce86c7SWei Liu V9fsPDU *pdu = opaque; 134160ce86c7SWei Liu V9fsState *s = pdu->s; 134256f101ecSGreg Kurz V9fsQID qid; 134360ce86c7SWei Liu 134460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 134560ce86c7SWei Liu if (err < 0) { 134660ce86c7SWei Liu pdu_complete(pdu, err); 134760ce86c7SWei Liu return ; 134860ce86c7SWei Liu } 134960ce86c7SWei Liu offset += err; 135060ce86c7SWei Liu 135160ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 135260ce86c7SWei Liu 135360ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 13541923923bSGreg Kurz wnames = g_new0(V9fsString, nwnames); 13551923923bSGreg Kurz qids = g_new0(V9fsQID, nwnames); 135660ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 135760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 135860ce86c7SWei Liu if (err < 0) { 135960ce86c7SWei Liu goto out_nofid; 136060ce86c7SWei Liu } 1361fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1362fff39a7aSGreg Kurz err = -ENOENT; 1363fff39a7aSGreg Kurz goto out_nofid; 1364fff39a7aSGreg Kurz } 136560ce86c7SWei Liu offset += err; 136660ce86c7SWei Liu } 136760ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 136860ce86c7SWei Liu err = -EINVAL; 136960ce86c7SWei Liu goto out_nofid; 137060ce86c7SWei Liu } 137160ce86c7SWei Liu fidp = get_fid(pdu, fid); 137260ce86c7SWei Liu if (fidp == NULL) { 137360ce86c7SWei Liu err = -ENOENT; 137460ce86c7SWei Liu goto out_nofid; 137560ce86c7SWei Liu } 137656f101ecSGreg Kurz 137713fd08e6SGreg Kurz v9fs_path_init(&dpath); 137813fd08e6SGreg Kurz v9fs_path_init(&path); 137913fd08e6SGreg Kurz 138056f101ecSGreg Kurz err = fid_to_qid(pdu, fidp, &qid); 138156f101ecSGreg Kurz if (err < 0) { 138256f101ecSGreg Kurz goto out; 138356f101ecSGreg Kurz } 138456f101ecSGreg Kurz 138560ce86c7SWei Liu /* 138660ce86c7SWei Liu * Both dpath and path initially poin to fidp. 138760ce86c7SWei Liu * Needed to handle request with nwnames == 0 138860ce86c7SWei Liu */ 138960ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 139060ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 139160ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 139256f101ecSGreg Kurz if (not_same_qid(&pdu->s->root_qid, &qid) || 139356f101ecSGreg Kurz strcmp("..", wnames[name_idx].data)) { 139456f101ecSGreg Kurz err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, 139556f101ecSGreg Kurz &path); 139660ce86c7SWei Liu if (err < 0) { 139760ce86c7SWei Liu goto out; 139860ce86c7SWei Liu } 139956f101ecSGreg Kurz 140060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 140160ce86c7SWei Liu if (err < 0) { 140260ce86c7SWei Liu goto out; 140360ce86c7SWei Liu } 1404*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 1405*3b5ee9e8SAntonios Motakis if (err < 0) { 1406*3b5ee9e8SAntonios Motakis goto out; 1407*3b5ee9e8SAntonios Motakis } 140860ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 140960ce86c7SWei Liu } 141056f101ecSGreg Kurz memcpy(&qids[name_idx], &qid, sizeof(qid)); 141156f101ecSGreg Kurz } 141260ce86c7SWei Liu if (fid == newfid) { 141349dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 141449dd946bSGreg Kurz err = -EINVAL; 141549dd946bSGreg Kurz goto out; 141649dd946bSGreg Kurz } 14175b3c77aaSGreg Kurz v9fs_path_write_lock(s); 141860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 14195b3c77aaSGreg Kurz v9fs_path_unlock(s); 142060ce86c7SWei Liu } else { 142160ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 142260ce86c7SWei Liu if (newfidp == NULL) { 142360ce86c7SWei Liu err = -EINVAL; 142460ce86c7SWei Liu goto out; 142560ce86c7SWei Liu } 142660ce86c7SWei Liu newfidp->uid = fidp->uid; 142760ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 142860ce86c7SWei Liu } 142960ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 143060ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 143160ce86c7SWei Liu out: 143260ce86c7SWei Liu put_fid(pdu, fidp); 143360ce86c7SWei Liu if (newfidp) { 143460ce86c7SWei Liu put_fid(pdu, newfidp); 143560ce86c7SWei Liu } 143660ce86c7SWei Liu v9fs_path_free(&dpath); 143760ce86c7SWei Liu v9fs_path_free(&path); 143860ce86c7SWei Liu out_nofid: 143960ce86c7SWei Liu pdu_complete(pdu, err); 144060ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 144160ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 144260ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 144360ce86c7SWei Liu } 144460ce86c7SWei Liu g_free(wnames); 144560ce86c7SWei Liu g_free(qids); 144660ce86c7SWei Liu } 144760ce86c7SWei Liu } 144860ce86c7SWei Liu 14498440e22eSGreg Kurz static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) 145060ce86c7SWei Liu { 145160ce86c7SWei Liu struct statfs stbuf; 145260ce86c7SWei Liu int32_t iounit = 0; 145360ce86c7SWei Liu V9fsState *s = pdu->s; 145460ce86c7SWei Liu 145560ce86c7SWei Liu /* 145660ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 145760ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 145860ce86c7SWei Liu */ 145960ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 146060ce86c7SWei Liu iounit = stbuf.f_bsize; 146160ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 146260ce86c7SWei Liu } 146360ce86c7SWei Liu if (!iounit) { 146460ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 146560ce86c7SWei Liu } 146660ce86c7SWei Liu return iounit; 146760ce86c7SWei Liu } 146860ce86c7SWei Liu 14698440e22eSGreg Kurz static void coroutine_fn v9fs_open(void *opaque) 147060ce86c7SWei Liu { 147160ce86c7SWei Liu int flags; 147260ce86c7SWei Liu int32_t fid; 147360ce86c7SWei Liu int32_t mode; 147460ce86c7SWei Liu V9fsQID qid; 147560ce86c7SWei Liu int iounit = 0; 147660ce86c7SWei Liu ssize_t err = 0; 147760ce86c7SWei Liu size_t offset = 7; 147860ce86c7SWei Liu struct stat stbuf; 147960ce86c7SWei Liu V9fsFidState *fidp; 148060ce86c7SWei Liu V9fsPDU *pdu = opaque; 148160ce86c7SWei Liu V9fsState *s = pdu->s; 148260ce86c7SWei Liu 148360ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 148460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 148560ce86c7SWei Liu } else { 148660ce86c7SWei Liu uint8_t modebyte; 148760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 148860ce86c7SWei Liu mode = modebyte; 148960ce86c7SWei Liu } 149060ce86c7SWei Liu if (err < 0) { 149160ce86c7SWei Liu goto out_nofid; 149260ce86c7SWei Liu } 149360ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 149460ce86c7SWei Liu 149560ce86c7SWei Liu fidp = get_fid(pdu, fid); 149660ce86c7SWei Liu if (fidp == NULL) { 149760ce86c7SWei Liu err = -ENOENT; 149860ce86c7SWei Liu goto out_nofid; 149960ce86c7SWei Liu } 150049dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 150149dd946bSGreg Kurz err = -EINVAL; 150249dd946bSGreg Kurz goto out; 150349dd946bSGreg Kurz } 150460ce86c7SWei Liu 150560ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 150660ce86c7SWei Liu if (err < 0) { 150760ce86c7SWei Liu goto out; 150860ce86c7SWei Liu } 1509*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 1510*3b5ee9e8SAntonios Motakis if (err < 0) { 1511*3b5ee9e8SAntonios Motakis goto out; 1512*3b5ee9e8SAntonios Motakis } 151360ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 151460ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 151560ce86c7SWei Liu if (err < 0) { 151660ce86c7SWei Liu goto out; 151760ce86c7SWei Liu } 151860ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 151960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 152060ce86c7SWei Liu if (err < 0) { 152160ce86c7SWei Liu goto out; 152260ce86c7SWei Liu } 152360ce86c7SWei Liu err += offset; 152460ce86c7SWei Liu } else { 152560ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 152660ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 152760ce86c7SWei Liu } else { 152860ce86c7SWei Liu flags = omode_to_uflags(mode); 152960ce86c7SWei Liu } 153060ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 153160ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 153260ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 153360ce86c7SWei Liu err = -EROFS; 153460ce86c7SWei Liu goto out; 153560ce86c7SWei Liu } 153660ce86c7SWei Liu } 153760ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 153860ce86c7SWei Liu if (err < 0) { 153960ce86c7SWei Liu goto out; 154060ce86c7SWei Liu } 154160ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 154260ce86c7SWei Liu fidp->open_flags = flags; 154360ce86c7SWei Liu if (flags & O_EXCL) { 154460ce86c7SWei Liu /* 154560ce86c7SWei Liu * We let the host file system do O_EXCL check 154660ce86c7SWei Liu * We should not reclaim such fd 154760ce86c7SWei Liu */ 154860ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 154960ce86c7SWei Liu } 155060ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 155160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 155260ce86c7SWei Liu if (err < 0) { 155360ce86c7SWei Liu goto out; 155460ce86c7SWei Liu } 155560ce86c7SWei Liu err += offset; 155660ce86c7SWei Liu } 155760ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 155860ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 155960ce86c7SWei Liu out: 156060ce86c7SWei Liu put_fid(pdu, fidp); 156160ce86c7SWei Liu out_nofid: 156260ce86c7SWei Liu pdu_complete(pdu, err); 156360ce86c7SWei Liu } 156460ce86c7SWei Liu 15658440e22eSGreg Kurz static void coroutine_fn v9fs_lcreate(void *opaque) 156660ce86c7SWei Liu { 156760ce86c7SWei Liu int32_t dfid, flags, mode; 156860ce86c7SWei Liu gid_t gid; 156960ce86c7SWei Liu ssize_t err = 0; 157060ce86c7SWei Liu ssize_t offset = 7; 157160ce86c7SWei Liu V9fsString name; 157260ce86c7SWei Liu V9fsFidState *fidp; 157360ce86c7SWei Liu struct stat stbuf; 157460ce86c7SWei Liu V9fsQID qid; 157560ce86c7SWei Liu int32_t iounit; 157660ce86c7SWei Liu V9fsPDU *pdu = opaque; 157760ce86c7SWei Liu 157860ce86c7SWei Liu v9fs_string_init(&name); 157960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 158060ce86c7SWei Liu &name, &flags, &mode, &gid); 158160ce86c7SWei Liu if (err < 0) { 158260ce86c7SWei Liu goto out_nofid; 158360ce86c7SWei Liu } 158460ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 158560ce86c7SWei Liu 1586fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1587fff39a7aSGreg Kurz err = -ENOENT; 1588fff39a7aSGreg Kurz goto out_nofid; 1589fff39a7aSGreg Kurz } 1590fff39a7aSGreg Kurz 1591805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1592805b5d98SGreg Kurz err = -EEXIST; 1593805b5d98SGreg Kurz goto out_nofid; 1594805b5d98SGreg Kurz } 1595805b5d98SGreg Kurz 159660ce86c7SWei Liu fidp = get_fid(pdu, dfid); 159760ce86c7SWei Liu if (fidp == NULL) { 159860ce86c7SWei Liu err = -ENOENT; 159960ce86c7SWei Liu goto out_nofid; 160060ce86c7SWei Liu } 1601d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 1602d63fb193SLi Qiang err = -EINVAL; 1603d63fb193SLi Qiang goto out; 1604d63fb193SLi Qiang } 160560ce86c7SWei Liu 160660ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 160760ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 160860ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 160960ce86c7SWei Liu if (err < 0) { 161060ce86c7SWei Liu goto out; 161160ce86c7SWei Liu } 161260ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 161360ce86c7SWei Liu fidp->open_flags = flags; 161460ce86c7SWei Liu if (flags & O_EXCL) { 161560ce86c7SWei Liu /* 161660ce86c7SWei Liu * We let the host file system do O_EXCL check 161760ce86c7SWei Liu * We should not reclaim such fd 161860ce86c7SWei Liu */ 161960ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 162060ce86c7SWei Liu } 162160ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 1622*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 1623*3b5ee9e8SAntonios Motakis if (err < 0) { 1624*3b5ee9e8SAntonios Motakis goto out; 1625*3b5ee9e8SAntonios Motakis } 162660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 162760ce86c7SWei Liu if (err < 0) { 162860ce86c7SWei Liu goto out; 162960ce86c7SWei Liu } 163060ce86c7SWei Liu err += offset; 163160ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 163260ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 163360ce86c7SWei Liu out: 163460ce86c7SWei Liu put_fid(pdu, fidp); 163560ce86c7SWei Liu out_nofid: 163660ce86c7SWei Liu pdu_complete(pdu, err); 163760ce86c7SWei Liu v9fs_string_free(&name); 163860ce86c7SWei Liu } 163960ce86c7SWei Liu 1640a1bf8b74SGreg Kurz static void coroutine_fn v9fs_fsync(void *opaque) 164160ce86c7SWei Liu { 164260ce86c7SWei Liu int err; 164360ce86c7SWei Liu int32_t fid; 164460ce86c7SWei Liu int datasync; 164560ce86c7SWei Liu size_t offset = 7; 164660ce86c7SWei Liu V9fsFidState *fidp; 164760ce86c7SWei Liu V9fsPDU *pdu = opaque; 164860ce86c7SWei Liu 164960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 165060ce86c7SWei Liu if (err < 0) { 165160ce86c7SWei Liu goto out_nofid; 165260ce86c7SWei Liu } 165360ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 165460ce86c7SWei Liu 165560ce86c7SWei Liu fidp = get_fid(pdu, fid); 165660ce86c7SWei Liu if (fidp == NULL) { 165760ce86c7SWei Liu err = -ENOENT; 165860ce86c7SWei Liu goto out_nofid; 165960ce86c7SWei Liu } 166060ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 166160ce86c7SWei Liu if (!err) { 166260ce86c7SWei Liu err = offset; 166360ce86c7SWei Liu } 166460ce86c7SWei Liu put_fid(pdu, fidp); 166560ce86c7SWei Liu out_nofid: 166660ce86c7SWei Liu pdu_complete(pdu, err); 166760ce86c7SWei Liu } 166860ce86c7SWei Liu 16698440e22eSGreg Kurz static void coroutine_fn v9fs_clunk(void *opaque) 167060ce86c7SWei Liu { 167160ce86c7SWei Liu int err; 167260ce86c7SWei Liu int32_t fid; 167360ce86c7SWei Liu size_t offset = 7; 167460ce86c7SWei Liu V9fsFidState *fidp; 167560ce86c7SWei Liu V9fsPDU *pdu = opaque; 167660ce86c7SWei Liu V9fsState *s = pdu->s; 167760ce86c7SWei Liu 167860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 167960ce86c7SWei Liu if (err < 0) { 168060ce86c7SWei Liu goto out_nofid; 168160ce86c7SWei Liu } 168260ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 168360ce86c7SWei Liu 168460ce86c7SWei Liu fidp = clunk_fid(s, fid); 168560ce86c7SWei Liu if (fidp == NULL) { 168660ce86c7SWei Liu err = -ENOENT; 168760ce86c7SWei Liu goto out_nofid; 168860ce86c7SWei Liu } 168960ce86c7SWei Liu /* 169060ce86c7SWei Liu * Bump the ref so that put_fid will 169160ce86c7SWei Liu * free the fid. 169260ce86c7SWei Liu */ 169360ce86c7SWei Liu fidp->ref++; 169460ce86c7SWei Liu err = put_fid(pdu, fidp); 169560ce86c7SWei Liu if (!err) { 169660ce86c7SWei Liu err = offset; 169760ce86c7SWei Liu } 169860ce86c7SWei Liu out_nofid: 169960ce86c7SWei Liu pdu_complete(pdu, err); 170060ce86c7SWei Liu } 170160ce86c7SWei Liu 1702bcb8998fSStefano Stabellini /* 1703bcb8998fSStefano Stabellini * Create a QEMUIOVector for a sub-region of PDU iovecs 1704bcb8998fSStefano Stabellini * 1705bcb8998fSStefano Stabellini * @qiov: uninitialized QEMUIOVector 1706bcb8998fSStefano Stabellini * @skip: number of bytes to skip from beginning of PDU 1707bcb8998fSStefano Stabellini * @size: number of bytes to include 1708bcb8998fSStefano Stabellini * @is_write: true - write, false - read 1709bcb8998fSStefano Stabellini * 1710bcb8998fSStefano Stabellini * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 1711bcb8998fSStefano Stabellini * with qemu_iovec_destroy(). 1712bcb8998fSStefano Stabellini */ 1713bcb8998fSStefano Stabellini static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 1714bcb8998fSStefano Stabellini size_t skip, size_t size, 1715bcb8998fSStefano Stabellini bool is_write) 1716bcb8998fSStefano Stabellini { 1717bcb8998fSStefano Stabellini QEMUIOVector elem; 1718bcb8998fSStefano Stabellini struct iovec *iov; 1719bcb8998fSStefano Stabellini unsigned int niov; 1720bcb8998fSStefano Stabellini 172188da0b03SStefano Stabellini if (is_write) { 17228d37de41SGreg Kurz pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov, size + skip); 172388da0b03SStefano Stabellini } else { 1724fa0eb5c5SGreg Kurz pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); 172588da0b03SStefano Stabellini } 1726bcb8998fSStefano Stabellini 1727bcb8998fSStefano Stabellini qemu_iovec_init_external(&elem, iov, niov); 1728bcb8998fSStefano Stabellini qemu_iovec_init(qiov, niov); 1729bcb8998fSStefano Stabellini qemu_iovec_concat(qiov, &elem, skip, size); 1730bcb8998fSStefano Stabellini } 1731bcb8998fSStefano Stabellini 173260ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 173360ce86c7SWei Liu uint64_t off, uint32_t max_count) 173460ce86c7SWei Liu { 173560ce86c7SWei Liu ssize_t err; 173660ce86c7SWei Liu size_t offset = 7; 17377e55d65cSLi Qiang uint64_t read_count; 1738bcb8998fSStefano Stabellini QEMUIOVector qiov_full; 173960ce86c7SWei Liu 17407e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 17417e55d65cSLi Qiang read_count = 0; 17427e55d65cSLi Qiang } else { 17437e55d65cSLi Qiang read_count = fidp->fs.xattr.len - off; 17447e55d65cSLi Qiang } 174560ce86c7SWei Liu if (read_count > max_count) { 174660ce86c7SWei Liu read_count = max_count; 174760ce86c7SWei Liu } 174860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 174960ce86c7SWei Liu if (err < 0) { 175060ce86c7SWei Liu return err; 175160ce86c7SWei Liu } 175260ce86c7SWei Liu offset += err; 175300588a0aSWei Liu 1754fa0eb5c5SGreg Kurz v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); 1755fa0eb5c5SGreg Kurz err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, 175660ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 175760ce86c7SWei Liu read_count); 1758bcb8998fSStefano Stabellini qemu_iovec_destroy(&qiov_full); 175960ce86c7SWei Liu if (err < 0) { 176060ce86c7SWei Liu return err; 176160ce86c7SWei Liu } 176260ce86c7SWei Liu offset += err; 176360ce86c7SWei Liu return offset; 176460ce86c7SWei Liu } 176560ce86c7SWei Liu 17668440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, 17678440e22eSGreg Kurz V9fsFidState *fidp, 17688440e22eSGreg Kurz uint32_t max_count) 176960ce86c7SWei Liu { 177060ce86c7SWei Liu V9fsPath path; 177160ce86c7SWei Liu V9fsStat v9stat; 177260ce86c7SWei Liu int len, err = 0; 177360ce86c7SWei Liu int32_t count = 0; 177460ce86c7SWei Liu struct stat stbuf; 177560ce86c7SWei Liu off_t saved_dir_pos; 1776635324e8SGreg Kurz struct dirent *dent; 177760ce86c7SWei Liu 177860ce86c7SWei Liu /* save the directory position */ 177960ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 178060ce86c7SWei Liu if (saved_dir_pos < 0) { 178160ce86c7SWei Liu return saved_dir_pos; 178260ce86c7SWei Liu } 178360ce86c7SWei Liu 178460ce86c7SWei Liu while (1) { 178560ce86c7SWei Liu v9fs_path_init(&path); 17867cde47d4SGreg Kurz 17877cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 17887cde47d4SGreg Kurz 1789635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1790635324e8SGreg Kurz if (err || !dent) { 179160ce86c7SWei Liu break; 179260ce86c7SWei Liu } 179360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 179460ce86c7SWei Liu if (err < 0) { 17958762a46dSGreg Kurz break; 179660ce86c7SWei Liu } 179760ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 179860ce86c7SWei Liu if (err < 0) { 17998762a46dSGreg Kurz break; 180060ce86c7SWei Liu } 18016069537fSJan Dakinevich err = stat_to_v9stat(pdu, &path, dent->d_name, &stbuf, &v9stat); 180260ce86c7SWei Liu if (err < 0) { 18038762a46dSGreg Kurz break; 180460ce86c7SWei Liu } 1805772a7369SJan Dakinevich if ((count + v9stat.size + 2) > max_count) { 18067cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18077cde47d4SGreg Kurz 180860ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 180960ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 181060ce86c7SWei Liu v9fs_stat_free(&v9stat); 181160ce86c7SWei Liu v9fs_path_free(&path); 181260ce86c7SWei Liu return count; 181360ce86c7SWei Liu } 1814772a7369SJan Dakinevich 1815772a7369SJan Dakinevich /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 1816772a7369SJan Dakinevich len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 1817772a7369SJan Dakinevich 1818772a7369SJan Dakinevich v9fs_readdir_unlock(&fidp->fs.dir); 1819772a7369SJan Dakinevich 1820772a7369SJan Dakinevich if (len < 0) { 1821772a7369SJan Dakinevich v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 1822772a7369SJan Dakinevich v9fs_stat_free(&v9stat); 1823772a7369SJan Dakinevich v9fs_path_free(&path); 1824772a7369SJan Dakinevich return len; 1825772a7369SJan Dakinevich } 182660ce86c7SWei Liu count += len; 182760ce86c7SWei Liu v9fs_stat_free(&v9stat); 182860ce86c7SWei Liu v9fs_path_free(&path); 182960ce86c7SWei Liu saved_dir_pos = dent->d_off; 183060ce86c7SWei Liu } 18318762a46dSGreg Kurz 18327cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18337cde47d4SGreg Kurz 183460ce86c7SWei Liu v9fs_path_free(&path); 183560ce86c7SWei Liu if (err < 0) { 183660ce86c7SWei Liu return err; 183760ce86c7SWei Liu } 183860ce86c7SWei Liu return count; 183960ce86c7SWei Liu } 184060ce86c7SWei Liu 18418440e22eSGreg Kurz static void coroutine_fn v9fs_read(void *opaque) 184260ce86c7SWei Liu { 184360ce86c7SWei Liu int32_t fid; 184460ce86c7SWei Liu uint64_t off; 184560ce86c7SWei Liu ssize_t err = 0; 184660ce86c7SWei Liu int32_t count = 0; 184760ce86c7SWei Liu size_t offset = 7; 184860ce86c7SWei Liu uint32_t max_count; 184960ce86c7SWei Liu V9fsFidState *fidp; 185060ce86c7SWei Liu V9fsPDU *pdu = opaque; 185160ce86c7SWei Liu V9fsState *s = pdu->s; 185260ce86c7SWei Liu 185360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 185460ce86c7SWei Liu if (err < 0) { 185560ce86c7SWei Liu goto out_nofid; 185660ce86c7SWei Liu } 185760ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 185860ce86c7SWei Liu 185960ce86c7SWei Liu fidp = get_fid(pdu, fid); 186060ce86c7SWei Liu if (fidp == NULL) { 186160ce86c7SWei Liu err = -EINVAL; 186260ce86c7SWei Liu goto out_nofid; 186360ce86c7SWei Liu } 186460ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 186560ce86c7SWei Liu 186660ce86c7SWei Liu if (off == 0) { 186760ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 186860ce86c7SWei Liu } 186960ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 187060ce86c7SWei Liu if (count < 0) { 187160ce86c7SWei Liu err = count; 187260ce86c7SWei Liu goto out; 187360ce86c7SWei Liu } 187460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 187560ce86c7SWei Liu if (err < 0) { 187660ce86c7SWei Liu goto out; 187760ce86c7SWei Liu } 187860ce86c7SWei Liu err += offset + count; 187960ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 188060ce86c7SWei Liu QEMUIOVector qiov_full; 188160ce86c7SWei Liu QEMUIOVector qiov; 188260ce86c7SWei Liu int32_t len; 188360ce86c7SWei Liu 188460ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 188560ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 188660ce86c7SWei Liu do { 188760ce86c7SWei Liu qemu_iovec_reset(&qiov); 188860ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 188960ce86c7SWei Liu if (0) { 189060ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 189160ce86c7SWei Liu } 189260ce86c7SWei Liu /* Loop in case of EINTR */ 189360ce86c7SWei Liu do { 189460ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 189560ce86c7SWei Liu if (len >= 0) { 189660ce86c7SWei Liu off += len; 189760ce86c7SWei Liu count += len; 189860ce86c7SWei Liu } 189960ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 190060ce86c7SWei Liu if (len < 0) { 190160ce86c7SWei Liu /* IO error return the error */ 190260ce86c7SWei Liu err = len; 1903e95c9a49SLi Qiang goto out_free_iovec; 190460ce86c7SWei Liu } 190560ce86c7SWei Liu } while (count < max_count && len > 0); 190660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 190760ce86c7SWei Liu if (err < 0) { 1908e95c9a49SLi Qiang goto out_free_iovec; 190960ce86c7SWei Liu } 191060ce86c7SWei Liu err += offset + count; 1911e95c9a49SLi Qiang out_free_iovec: 191260ce86c7SWei Liu qemu_iovec_destroy(&qiov); 191360ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 191460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 191560ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 191660ce86c7SWei Liu } else { 191760ce86c7SWei Liu err = -EINVAL; 191860ce86c7SWei Liu } 191960ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 192060ce86c7SWei Liu out: 192160ce86c7SWei Liu put_fid(pdu, fidp); 192260ce86c7SWei Liu out_nofid: 192360ce86c7SWei Liu pdu_complete(pdu, err); 192460ce86c7SWei Liu } 192560ce86c7SWei Liu 192660ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 192760ce86c7SWei Liu { 192860ce86c7SWei Liu /* 192960ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 193060ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 193160ce86c7SWei Liu */ 193260ce86c7SWei Liu return 24 + v9fs_string_size(name); 193360ce86c7SWei Liu } 193460ce86c7SWei Liu 19358440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, 19368440e22eSGreg Kurz int32_t max_count) 193760ce86c7SWei Liu { 193860ce86c7SWei Liu size_t size; 193960ce86c7SWei Liu V9fsQID qid; 194060ce86c7SWei Liu V9fsString name; 194160ce86c7SWei Liu int len, err = 0; 194260ce86c7SWei Liu int32_t count = 0; 194360ce86c7SWei Liu off_t saved_dir_pos; 1944635324e8SGreg Kurz struct dirent *dent; 194560ce86c7SWei Liu 194660ce86c7SWei Liu /* save the directory position */ 194760ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 194860ce86c7SWei Liu if (saved_dir_pos < 0) { 194960ce86c7SWei Liu return saved_dir_pos; 195060ce86c7SWei Liu } 195160ce86c7SWei Liu 195260ce86c7SWei Liu while (1) { 19537cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 19547cde47d4SGreg Kurz 1955635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1956635324e8SGreg Kurz if (err || !dent) { 195760ce86c7SWei Liu break; 195860ce86c7SWei Liu } 195960ce86c7SWei Liu v9fs_string_init(&name); 196060ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 196160ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 19627cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19637cde47d4SGreg Kurz 196460ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 196560ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 196660ce86c7SWei Liu v9fs_string_free(&name); 196760ce86c7SWei Liu return count; 196860ce86c7SWei Liu } 196960ce86c7SWei Liu /* 197060ce86c7SWei Liu * Fill up just the path field of qid because the client uses 197160ce86c7SWei Liu * only that. To fill the entire qid structure we will have 197260ce86c7SWei Liu * to stat each dirent found, which is expensive 197360ce86c7SWei Liu */ 197460ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 197560ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 197660ce86c7SWei Liu /* Fill the other fields with dummy values */ 197760ce86c7SWei Liu qid.type = 0; 197860ce86c7SWei Liu qid.version = 0; 197960ce86c7SWei Liu 198060ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 198160ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 198260ce86c7SWei Liu &qid, dent->d_off, 198360ce86c7SWei Liu dent->d_type, &name); 19847cde47d4SGreg Kurz 19857cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19867cde47d4SGreg Kurz 198760ce86c7SWei Liu if (len < 0) { 198860ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 198960ce86c7SWei Liu v9fs_string_free(&name); 199060ce86c7SWei Liu return len; 199160ce86c7SWei Liu } 199260ce86c7SWei Liu count += len; 199360ce86c7SWei Liu v9fs_string_free(&name); 199460ce86c7SWei Liu saved_dir_pos = dent->d_off; 199560ce86c7SWei Liu } 19967cde47d4SGreg Kurz 19977cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19987cde47d4SGreg Kurz 199960ce86c7SWei Liu if (err < 0) { 200060ce86c7SWei Liu return err; 200160ce86c7SWei Liu } 200260ce86c7SWei Liu return count; 200360ce86c7SWei Liu } 200460ce86c7SWei Liu 20058440e22eSGreg Kurz static void coroutine_fn v9fs_readdir(void *opaque) 200660ce86c7SWei Liu { 200760ce86c7SWei Liu int32_t fid; 200860ce86c7SWei Liu V9fsFidState *fidp; 200960ce86c7SWei Liu ssize_t retval = 0; 201060ce86c7SWei Liu size_t offset = 7; 201160ce86c7SWei Liu uint64_t initial_offset; 201260ce86c7SWei Liu int32_t count; 201360ce86c7SWei Liu uint32_t max_count; 201460ce86c7SWei Liu V9fsPDU *pdu = opaque; 201560ce86c7SWei Liu 201660ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 201760ce86c7SWei Liu &initial_offset, &max_count); 201860ce86c7SWei Liu if (retval < 0) { 201960ce86c7SWei Liu goto out_nofid; 202060ce86c7SWei Liu } 202160ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 202260ce86c7SWei Liu 202360ce86c7SWei Liu fidp = get_fid(pdu, fid); 202460ce86c7SWei Liu if (fidp == NULL) { 202560ce86c7SWei Liu retval = -EINVAL; 202660ce86c7SWei Liu goto out_nofid; 202760ce86c7SWei Liu } 2028f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 202960ce86c7SWei Liu retval = -EINVAL; 203060ce86c7SWei Liu goto out; 203160ce86c7SWei Liu } 203260ce86c7SWei Liu if (initial_offset == 0) { 203360ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 203460ce86c7SWei Liu } else { 203560ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 203660ce86c7SWei Liu } 203760ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 203860ce86c7SWei Liu if (count < 0) { 203960ce86c7SWei Liu retval = count; 204060ce86c7SWei Liu goto out; 204160ce86c7SWei Liu } 204260ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 204360ce86c7SWei Liu if (retval < 0) { 204460ce86c7SWei Liu goto out; 204560ce86c7SWei Liu } 204660ce86c7SWei Liu retval += count + offset; 204760ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 204860ce86c7SWei Liu out: 204960ce86c7SWei Liu put_fid(pdu, fidp); 205060ce86c7SWei Liu out_nofid: 205160ce86c7SWei Liu pdu_complete(pdu, retval); 205260ce86c7SWei Liu } 205360ce86c7SWei Liu 205460ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 205560ce86c7SWei Liu uint64_t off, uint32_t count, 205660ce86c7SWei Liu struct iovec *sg, int cnt) 205760ce86c7SWei Liu { 205860ce86c7SWei Liu int i, to_copy; 205960ce86c7SWei Liu ssize_t err = 0; 20607e55d65cSLi Qiang uint64_t write_count; 206160ce86c7SWei Liu size_t offset = 7; 206260ce86c7SWei Liu 206360ce86c7SWei Liu 20647e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 206560ce86c7SWei Liu err = -ENOSPC; 206660ce86c7SWei Liu goto out; 206760ce86c7SWei Liu } 20687e55d65cSLi Qiang write_count = fidp->fs.xattr.len - off; 20697e55d65cSLi Qiang if (write_count > count) { 20707e55d65cSLi Qiang write_count = count; 20717e55d65cSLi Qiang } 207260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 207360ce86c7SWei Liu if (err < 0) { 207460ce86c7SWei Liu return err; 207560ce86c7SWei Liu } 207660ce86c7SWei Liu err += offset; 207760ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 207860ce86c7SWei Liu /* 207960ce86c7SWei Liu * Now copy the content from sg list 208060ce86c7SWei Liu */ 208160ce86c7SWei Liu for (i = 0; i < cnt; i++) { 208260ce86c7SWei Liu if (write_count > sg[i].iov_len) { 208360ce86c7SWei Liu to_copy = sg[i].iov_len; 208460ce86c7SWei Liu } else { 208560ce86c7SWei Liu to_copy = write_count; 208660ce86c7SWei Liu } 208760ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 208860ce86c7SWei Liu /* updating vs->off since we are not using below */ 208960ce86c7SWei Liu off += to_copy; 209060ce86c7SWei Liu write_count -= to_copy; 209160ce86c7SWei Liu } 209260ce86c7SWei Liu out: 209360ce86c7SWei Liu return err; 209460ce86c7SWei Liu } 209560ce86c7SWei Liu 20968440e22eSGreg Kurz static void coroutine_fn v9fs_write(void *opaque) 209760ce86c7SWei Liu { 209860ce86c7SWei Liu ssize_t err; 209960ce86c7SWei Liu int32_t fid; 210060ce86c7SWei Liu uint64_t off; 210160ce86c7SWei Liu uint32_t count; 210260ce86c7SWei Liu int32_t len = 0; 210360ce86c7SWei Liu int32_t total = 0; 210460ce86c7SWei Liu size_t offset = 7; 210560ce86c7SWei Liu V9fsFidState *fidp; 210660ce86c7SWei Liu V9fsPDU *pdu = opaque; 210760ce86c7SWei Liu V9fsState *s = pdu->s; 210860ce86c7SWei Liu QEMUIOVector qiov_full; 210960ce86c7SWei Liu QEMUIOVector qiov; 211060ce86c7SWei Liu 211160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 211260ce86c7SWei Liu if (err < 0) { 211360ce86c7SWei Liu pdu_complete(pdu, err); 211460ce86c7SWei Liu return; 211560ce86c7SWei Liu } 211660ce86c7SWei Liu offset += err; 211760ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 211860ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 211960ce86c7SWei Liu 212060ce86c7SWei Liu fidp = get_fid(pdu, fid); 212160ce86c7SWei Liu if (fidp == NULL) { 212260ce86c7SWei Liu err = -EINVAL; 212360ce86c7SWei Liu goto out_nofid; 212460ce86c7SWei Liu } 212560ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 212660ce86c7SWei Liu if (fidp->fs.fd == -1) { 212760ce86c7SWei Liu err = -EINVAL; 212860ce86c7SWei Liu goto out; 212960ce86c7SWei Liu } 213060ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 213160ce86c7SWei Liu /* 213260ce86c7SWei Liu * setxattr operation 213360ce86c7SWei Liu */ 213460ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 213560ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 213660ce86c7SWei Liu goto out; 213760ce86c7SWei Liu } else { 213860ce86c7SWei Liu err = -EINVAL; 213960ce86c7SWei Liu goto out; 214060ce86c7SWei Liu } 214160ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 214260ce86c7SWei Liu do { 214360ce86c7SWei Liu qemu_iovec_reset(&qiov); 214460ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 214560ce86c7SWei Liu if (0) { 214660ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 214760ce86c7SWei Liu } 214860ce86c7SWei Liu /* Loop in case of EINTR */ 214960ce86c7SWei Liu do { 215060ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 215160ce86c7SWei Liu if (len >= 0) { 215260ce86c7SWei Liu off += len; 215360ce86c7SWei Liu total += len; 215460ce86c7SWei Liu } 215560ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 215660ce86c7SWei Liu if (len < 0) { 215760ce86c7SWei Liu /* IO error return the error */ 215860ce86c7SWei Liu err = len; 215960ce86c7SWei Liu goto out_qiov; 216060ce86c7SWei Liu } 216160ce86c7SWei Liu } while (total < count && len > 0); 216260ce86c7SWei Liu 216360ce86c7SWei Liu offset = 7; 216460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 216560ce86c7SWei Liu if (err < 0) { 2166fdfcc9aeSLi Qiang goto out_qiov; 216760ce86c7SWei Liu } 216860ce86c7SWei Liu err += offset; 216960ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 217060ce86c7SWei Liu out_qiov: 217160ce86c7SWei Liu qemu_iovec_destroy(&qiov); 217260ce86c7SWei Liu out: 217360ce86c7SWei Liu put_fid(pdu, fidp); 217460ce86c7SWei Liu out_nofid: 217560ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 217660ce86c7SWei Liu pdu_complete(pdu, err); 217760ce86c7SWei Liu } 217860ce86c7SWei Liu 21798440e22eSGreg Kurz static void coroutine_fn v9fs_create(void *opaque) 218060ce86c7SWei Liu { 218160ce86c7SWei Liu int32_t fid; 218260ce86c7SWei Liu int err = 0; 218360ce86c7SWei Liu size_t offset = 7; 218460ce86c7SWei Liu V9fsFidState *fidp; 218560ce86c7SWei Liu V9fsQID qid; 218660ce86c7SWei Liu int32_t perm; 218760ce86c7SWei Liu int8_t mode; 218860ce86c7SWei Liu V9fsPath path; 218960ce86c7SWei Liu struct stat stbuf; 219060ce86c7SWei Liu V9fsString name; 219160ce86c7SWei Liu V9fsString extension; 219260ce86c7SWei Liu int iounit; 219360ce86c7SWei Liu V9fsPDU *pdu = opaque; 21945b3c77aaSGreg Kurz V9fsState *s = pdu->s; 219560ce86c7SWei Liu 219660ce86c7SWei Liu v9fs_path_init(&path); 219760ce86c7SWei Liu v9fs_string_init(&name); 219860ce86c7SWei Liu v9fs_string_init(&extension); 219960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 220060ce86c7SWei Liu &perm, &mode, &extension); 220160ce86c7SWei Liu if (err < 0) { 220260ce86c7SWei Liu goto out_nofid; 220360ce86c7SWei Liu } 220460ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 220560ce86c7SWei Liu 2206fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2207fff39a7aSGreg Kurz err = -ENOENT; 2208fff39a7aSGreg Kurz goto out_nofid; 2209fff39a7aSGreg Kurz } 2210fff39a7aSGreg Kurz 2211805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2212805b5d98SGreg Kurz err = -EEXIST; 2213805b5d98SGreg Kurz goto out_nofid; 2214805b5d98SGreg Kurz } 2215805b5d98SGreg Kurz 221660ce86c7SWei Liu fidp = get_fid(pdu, fid); 221760ce86c7SWei Liu if (fidp == NULL) { 221860ce86c7SWei Liu err = -EINVAL; 221960ce86c7SWei Liu goto out_nofid; 222060ce86c7SWei Liu } 2221d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 2222d63fb193SLi Qiang err = -EINVAL; 2223d63fb193SLi Qiang goto out; 2224d63fb193SLi Qiang } 222560ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 222660ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 222760ce86c7SWei Liu fidp->uid, -1, &stbuf); 222860ce86c7SWei Liu if (err < 0) { 222960ce86c7SWei Liu goto out; 223060ce86c7SWei Liu } 223160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 223260ce86c7SWei Liu if (err < 0) { 223360ce86c7SWei Liu goto out; 223460ce86c7SWei Liu } 22355b3c77aaSGreg Kurz v9fs_path_write_lock(s); 223660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22375b3c77aaSGreg Kurz v9fs_path_unlock(s); 223860ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 223960ce86c7SWei Liu if (err < 0) { 224060ce86c7SWei Liu goto out; 224160ce86c7SWei Liu } 224260ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 224360ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 224460ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 224560ce86c7SWei Liu extension.data, -1 , &stbuf); 224660ce86c7SWei Liu if (err < 0) { 224760ce86c7SWei Liu goto out; 224860ce86c7SWei Liu } 224960ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 225060ce86c7SWei Liu if (err < 0) { 225160ce86c7SWei Liu goto out; 225260ce86c7SWei Liu } 22535b3c77aaSGreg Kurz v9fs_path_write_lock(s); 225460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22555b3c77aaSGreg Kurz v9fs_path_unlock(s); 225660ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 225760ce86c7SWei Liu int32_t ofid = atoi(extension.data); 225860ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 225960ce86c7SWei Liu if (ofidp == NULL) { 226060ce86c7SWei Liu err = -EINVAL; 226160ce86c7SWei Liu goto out; 226260ce86c7SWei Liu } 226360ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 226460ce86c7SWei Liu put_fid(pdu, ofidp); 226560ce86c7SWei Liu if (err < 0) { 226660ce86c7SWei Liu goto out; 226760ce86c7SWei Liu } 226860ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 226960ce86c7SWei Liu if (err < 0) { 227060ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 227160ce86c7SWei Liu goto out; 227260ce86c7SWei Liu } 22735b3c77aaSGreg Kurz v9fs_path_write_lock(s); 227460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22755b3c77aaSGreg Kurz v9fs_path_unlock(s); 227660ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 227760ce86c7SWei Liu if (err < 0) { 227860ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 227960ce86c7SWei Liu goto out; 228060ce86c7SWei Liu } 228160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 228260ce86c7SWei Liu char ctype; 228360ce86c7SWei Liu uint32_t major, minor; 228460ce86c7SWei Liu mode_t nmode = 0; 228560ce86c7SWei Liu 228660ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 228760ce86c7SWei Liu err = -errno; 228860ce86c7SWei Liu goto out; 228960ce86c7SWei Liu } 229060ce86c7SWei Liu 229160ce86c7SWei Liu switch (ctype) { 229260ce86c7SWei Liu case 'c': 229360ce86c7SWei Liu nmode = S_IFCHR; 229460ce86c7SWei Liu break; 229560ce86c7SWei Liu case 'b': 229660ce86c7SWei Liu nmode = S_IFBLK; 229760ce86c7SWei Liu break; 229860ce86c7SWei Liu default: 229960ce86c7SWei Liu err = -EIO; 230060ce86c7SWei Liu goto out; 230160ce86c7SWei Liu } 230260ce86c7SWei Liu 230360ce86c7SWei Liu nmode |= perm & 0777; 230460ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 230560ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 230660ce86c7SWei Liu if (err < 0) { 230760ce86c7SWei Liu goto out; 230860ce86c7SWei Liu } 230960ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 231060ce86c7SWei Liu if (err < 0) { 231160ce86c7SWei Liu goto out; 231260ce86c7SWei Liu } 23135b3c77aaSGreg Kurz v9fs_path_write_lock(s); 231460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23155b3c77aaSGreg Kurz v9fs_path_unlock(s); 231660ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 231760ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 231860ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 231960ce86c7SWei Liu if (err < 0) { 232060ce86c7SWei Liu goto out; 232160ce86c7SWei Liu } 232260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 232360ce86c7SWei Liu if (err < 0) { 232460ce86c7SWei Liu goto out; 232560ce86c7SWei Liu } 23265b3c77aaSGreg Kurz v9fs_path_write_lock(s); 232760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23285b3c77aaSGreg Kurz v9fs_path_unlock(s); 232960ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 233060ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 233160ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 233260ce86c7SWei Liu if (err < 0) { 233360ce86c7SWei Liu goto out; 233460ce86c7SWei Liu } 233560ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 233660ce86c7SWei Liu if (err < 0) { 233760ce86c7SWei Liu goto out; 233860ce86c7SWei Liu } 23395b3c77aaSGreg Kurz v9fs_path_write_lock(s); 234060ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23415b3c77aaSGreg Kurz v9fs_path_unlock(s); 234260ce86c7SWei Liu } else { 234360ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 234460ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 234560ce86c7SWei Liu if (err < 0) { 234660ce86c7SWei Liu goto out; 234760ce86c7SWei Liu } 234860ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 234960ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 235060ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 235160ce86c7SWei Liu /* 235260ce86c7SWei Liu * We let the host file system do O_EXCL check 235360ce86c7SWei Liu * We should not reclaim such fd 235460ce86c7SWei Liu */ 235560ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 235660ce86c7SWei Liu } 235760ce86c7SWei Liu } 235860ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 2359*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 2360*3b5ee9e8SAntonios Motakis if (err < 0) { 2361*3b5ee9e8SAntonios Motakis goto out; 2362*3b5ee9e8SAntonios Motakis } 236360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 236460ce86c7SWei Liu if (err < 0) { 236560ce86c7SWei Liu goto out; 236660ce86c7SWei Liu } 236760ce86c7SWei Liu err += offset; 236860ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 236960ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 237060ce86c7SWei Liu out: 237160ce86c7SWei Liu put_fid(pdu, fidp); 237260ce86c7SWei Liu out_nofid: 237360ce86c7SWei Liu pdu_complete(pdu, err); 237460ce86c7SWei Liu v9fs_string_free(&name); 237560ce86c7SWei Liu v9fs_string_free(&extension); 237660ce86c7SWei Liu v9fs_path_free(&path); 237760ce86c7SWei Liu } 237860ce86c7SWei Liu 23798440e22eSGreg Kurz static void coroutine_fn v9fs_symlink(void *opaque) 238060ce86c7SWei Liu { 238160ce86c7SWei Liu V9fsPDU *pdu = opaque; 238260ce86c7SWei Liu V9fsString name; 238360ce86c7SWei Liu V9fsString symname; 238460ce86c7SWei Liu V9fsFidState *dfidp; 238560ce86c7SWei Liu V9fsQID qid; 238660ce86c7SWei Liu struct stat stbuf; 238760ce86c7SWei Liu int32_t dfid; 238860ce86c7SWei Liu int err = 0; 238960ce86c7SWei Liu gid_t gid; 239060ce86c7SWei Liu size_t offset = 7; 239160ce86c7SWei Liu 239260ce86c7SWei Liu v9fs_string_init(&name); 239360ce86c7SWei Liu v9fs_string_init(&symname); 239460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 239560ce86c7SWei Liu if (err < 0) { 239660ce86c7SWei Liu goto out_nofid; 239760ce86c7SWei Liu } 239860ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 239960ce86c7SWei Liu 2400fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2401fff39a7aSGreg Kurz err = -ENOENT; 2402fff39a7aSGreg Kurz goto out_nofid; 2403fff39a7aSGreg Kurz } 2404fff39a7aSGreg Kurz 2405805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2406805b5d98SGreg Kurz err = -EEXIST; 2407805b5d98SGreg Kurz goto out_nofid; 2408805b5d98SGreg Kurz } 2409805b5d98SGreg Kurz 241060ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 241160ce86c7SWei Liu if (dfidp == NULL) { 241260ce86c7SWei Liu err = -EINVAL; 241360ce86c7SWei Liu goto out_nofid; 241460ce86c7SWei Liu } 241560ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 241660ce86c7SWei Liu if (err < 0) { 241760ce86c7SWei Liu goto out; 241860ce86c7SWei Liu } 2419*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 2420*3b5ee9e8SAntonios Motakis if (err < 0) { 2421*3b5ee9e8SAntonios Motakis goto out; 2422*3b5ee9e8SAntonios Motakis } 242360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 242460ce86c7SWei Liu if (err < 0) { 242560ce86c7SWei Liu goto out; 242660ce86c7SWei Liu } 242760ce86c7SWei Liu err += offset; 242860ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 242960ce86c7SWei Liu qid.type, qid.version, qid.path); 243060ce86c7SWei Liu out: 243160ce86c7SWei Liu put_fid(pdu, dfidp); 243260ce86c7SWei Liu out_nofid: 243360ce86c7SWei Liu pdu_complete(pdu, err); 243460ce86c7SWei Liu v9fs_string_free(&name); 243560ce86c7SWei Liu v9fs_string_free(&symname); 243660ce86c7SWei Liu } 243760ce86c7SWei Liu 2438a1bf8b74SGreg Kurz static void coroutine_fn v9fs_flush(void *opaque) 243960ce86c7SWei Liu { 244060ce86c7SWei Liu ssize_t err; 244160ce86c7SWei Liu int16_t tag; 244260ce86c7SWei Liu size_t offset = 7; 2443d5f2af7bSGreg Kurz V9fsPDU *cancel_pdu = NULL; 244460ce86c7SWei Liu V9fsPDU *pdu = opaque; 244560ce86c7SWei Liu V9fsState *s = pdu->s; 244660ce86c7SWei Liu 244760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 244860ce86c7SWei Liu if (err < 0) { 244960ce86c7SWei Liu pdu_complete(pdu, err); 245060ce86c7SWei Liu return; 245160ce86c7SWei Liu } 245260ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 245360ce86c7SWei Liu 2454d5f2af7bSGreg Kurz if (pdu->tag == tag) { 24553dc6f869SAlistair Francis warn_report("the guest sent a self-referencing 9P flush request"); 2456d5f2af7bSGreg Kurz } else { 245760ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 245860ce86c7SWei Liu if (cancel_pdu->tag == tag) { 245960ce86c7SWei Liu break; 246060ce86c7SWei Liu } 246160ce86c7SWei Liu } 2462d5f2af7bSGreg Kurz } 246360ce86c7SWei Liu if (cancel_pdu) { 246460ce86c7SWei Liu cancel_pdu->cancelled = 1; 246560ce86c7SWei Liu /* 246660ce86c7SWei Liu * Wait for pdu to complete. 246760ce86c7SWei Liu */ 24681ace7ceaSPaolo Bonzini qemu_co_queue_wait(&cancel_pdu->complete, NULL); 246918adde86SGreg Kurz if (!qemu_co_queue_next(&cancel_pdu->complete)) { 247060ce86c7SWei Liu cancel_pdu->cancelled = 0; 247160ce86c7SWei Liu pdu_free(cancel_pdu); 247260ce86c7SWei Liu } 247318adde86SGreg Kurz } 247460ce86c7SWei Liu pdu_complete(pdu, 7); 247560ce86c7SWei Liu } 247660ce86c7SWei Liu 24778440e22eSGreg Kurz static void coroutine_fn v9fs_link(void *opaque) 247860ce86c7SWei Liu { 247960ce86c7SWei Liu V9fsPDU *pdu = opaque; 248060ce86c7SWei Liu int32_t dfid, oldfid; 248160ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 248260ce86c7SWei Liu V9fsString name; 248360ce86c7SWei Liu size_t offset = 7; 248460ce86c7SWei Liu int err = 0; 248560ce86c7SWei Liu 248660ce86c7SWei Liu v9fs_string_init(&name); 248760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 248860ce86c7SWei Liu if (err < 0) { 248960ce86c7SWei Liu goto out_nofid; 249060ce86c7SWei Liu } 249160ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 249260ce86c7SWei Liu 2493fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2494fff39a7aSGreg Kurz err = -ENOENT; 2495fff39a7aSGreg Kurz goto out_nofid; 2496fff39a7aSGreg Kurz } 2497fff39a7aSGreg Kurz 2498805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2499805b5d98SGreg Kurz err = -EEXIST; 2500805b5d98SGreg Kurz goto out_nofid; 2501805b5d98SGreg Kurz } 2502805b5d98SGreg Kurz 250360ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 250460ce86c7SWei Liu if (dfidp == NULL) { 250560ce86c7SWei Liu err = -ENOENT; 250660ce86c7SWei Liu goto out_nofid; 250760ce86c7SWei Liu } 250860ce86c7SWei Liu 250960ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 251060ce86c7SWei Liu if (oldfidp == NULL) { 251160ce86c7SWei Liu err = -ENOENT; 251260ce86c7SWei Liu goto out; 251360ce86c7SWei Liu } 251460ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 251560ce86c7SWei Liu if (!err) { 251660ce86c7SWei Liu err = offset; 251760ce86c7SWei Liu } 25184c158678SLi Qiang put_fid(pdu, oldfidp); 251960ce86c7SWei Liu out: 252060ce86c7SWei Liu put_fid(pdu, dfidp); 252160ce86c7SWei Liu out_nofid: 252260ce86c7SWei Liu v9fs_string_free(&name); 252360ce86c7SWei Liu pdu_complete(pdu, err); 252460ce86c7SWei Liu } 252560ce86c7SWei Liu 252660ce86c7SWei Liu /* Only works with path name based fid */ 25278440e22eSGreg Kurz static void coroutine_fn v9fs_remove(void *opaque) 252860ce86c7SWei Liu { 252960ce86c7SWei Liu int32_t fid; 253060ce86c7SWei Liu int err = 0; 253160ce86c7SWei Liu size_t offset = 7; 253260ce86c7SWei Liu V9fsFidState *fidp; 253360ce86c7SWei Liu V9fsPDU *pdu = opaque; 253460ce86c7SWei Liu 253560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 253660ce86c7SWei Liu if (err < 0) { 253760ce86c7SWei Liu goto out_nofid; 253860ce86c7SWei Liu } 253960ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 254060ce86c7SWei Liu 254160ce86c7SWei Liu fidp = get_fid(pdu, fid); 254260ce86c7SWei Liu if (fidp == NULL) { 254360ce86c7SWei Liu err = -EINVAL; 254460ce86c7SWei Liu goto out_nofid; 254560ce86c7SWei Liu } 254660ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 254760ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 254860ce86c7SWei Liu err = -EOPNOTSUPP; 254960ce86c7SWei Liu goto out_err; 255060ce86c7SWei Liu } 255160ce86c7SWei Liu /* 255260ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 255360ce86c7SWei Liu * the file later. So don't reclaim fd 255460ce86c7SWei Liu */ 255560ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 255660ce86c7SWei Liu if (err < 0) { 255760ce86c7SWei Liu goto out_err; 255860ce86c7SWei Liu } 255960ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 256060ce86c7SWei Liu if (!err) { 256160ce86c7SWei Liu err = offset; 256260ce86c7SWei Liu } 256360ce86c7SWei Liu out_err: 256460ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 256560ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 256660ce86c7SWei Liu put_fid(pdu, fidp); 256760ce86c7SWei Liu out_nofid: 256860ce86c7SWei Liu pdu_complete(pdu, err); 256960ce86c7SWei Liu } 257060ce86c7SWei Liu 25718440e22eSGreg Kurz static void coroutine_fn v9fs_unlinkat(void *opaque) 257260ce86c7SWei Liu { 257360ce86c7SWei Liu int err = 0; 257460ce86c7SWei Liu V9fsString name; 257567e87345SKeno Fischer int32_t dfid, flags, rflags = 0; 257660ce86c7SWei Liu size_t offset = 7; 257760ce86c7SWei Liu V9fsPath path; 257860ce86c7SWei Liu V9fsFidState *dfidp; 257960ce86c7SWei Liu V9fsPDU *pdu = opaque; 258060ce86c7SWei Liu 258160ce86c7SWei Liu v9fs_string_init(&name); 258260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 258360ce86c7SWei Liu if (err < 0) { 258460ce86c7SWei Liu goto out_nofid; 258560ce86c7SWei Liu } 2586fff39a7aSGreg Kurz 2587fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2588fff39a7aSGreg Kurz err = -ENOENT; 2589fff39a7aSGreg Kurz goto out_nofid; 2590fff39a7aSGreg Kurz } 2591fff39a7aSGreg Kurz 2592805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2593805b5d98SGreg Kurz err = -EINVAL; 2594805b5d98SGreg Kurz goto out_nofid; 2595805b5d98SGreg Kurz } 2596805b5d98SGreg Kurz 2597805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2598805b5d98SGreg Kurz err = -ENOTEMPTY; 2599805b5d98SGreg Kurz goto out_nofid; 2600805b5d98SGreg Kurz } 2601805b5d98SGreg Kurz 260267e87345SKeno Fischer if (flags & ~P9_DOTL_AT_REMOVEDIR) { 260367e87345SKeno Fischer err = -EINVAL; 260467e87345SKeno Fischer goto out_nofid; 260567e87345SKeno Fischer } 260667e87345SKeno Fischer 260767e87345SKeno Fischer if (flags & P9_DOTL_AT_REMOVEDIR) { 260867e87345SKeno Fischer rflags |= AT_REMOVEDIR; 260967e87345SKeno Fischer } 261067e87345SKeno Fischer 261160ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 261260ce86c7SWei Liu if (dfidp == NULL) { 261360ce86c7SWei Liu err = -EINVAL; 261460ce86c7SWei Liu goto out_nofid; 261560ce86c7SWei Liu } 261660ce86c7SWei Liu /* 261760ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 261860ce86c7SWei Liu * the file later. So don't reclaim fd 261960ce86c7SWei Liu */ 262060ce86c7SWei Liu v9fs_path_init(&path); 262160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 262260ce86c7SWei Liu if (err < 0) { 262360ce86c7SWei Liu goto out_err; 262460ce86c7SWei Liu } 262560ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 262660ce86c7SWei Liu if (err < 0) { 262760ce86c7SWei Liu goto out_err; 262860ce86c7SWei Liu } 262967e87345SKeno Fischer err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, rflags); 263060ce86c7SWei Liu if (!err) { 263160ce86c7SWei Liu err = offset; 263260ce86c7SWei Liu } 263360ce86c7SWei Liu out_err: 263460ce86c7SWei Liu put_fid(pdu, dfidp); 263560ce86c7SWei Liu v9fs_path_free(&path); 263660ce86c7SWei Liu out_nofid: 263760ce86c7SWei Liu pdu_complete(pdu, err); 263860ce86c7SWei Liu v9fs_string_free(&name); 263960ce86c7SWei Liu } 264060ce86c7SWei Liu 264160ce86c7SWei Liu 264260ce86c7SWei Liu /* Only works with path name based fid */ 26438440e22eSGreg Kurz static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 26448440e22eSGreg Kurz int32_t newdirfid, 26458440e22eSGreg Kurz V9fsString *name) 264660ce86c7SWei Liu { 264760ce86c7SWei Liu int err = 0; 264860ce86c7SWei Liu V9fsPath new_path; 264960ce86c7SWei Liu V9fsFidState *tfidp; 265060ce86c7SWei Liu V9fsState *s = pdu->s; 265160ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 265260ce86c7SWei Liu 265360ce86c7SWei Liu v9fs_path_init(&new_path); 265460ce86c7SWei Liu if (newdirfid != -1) { 265560ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 265660ce86c7SWei Liu if (dirfidp == NULL) { 265760ce86c7SWei Liu err = -ENOENT; 265860ce86c7SWei Liu goto out_nofid; 265960ce86c7SWei Liu } 266049dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 266149dd946bSGreg Kurz err = -EINVAL; 266249dd946bSGreg Kurz goto out; 266349dd946bSGreg Kurz } 26644fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 26654fa62005SGreg Kurz if (err < 0) { 26664fa62005SGreg Kurz goto out; 26674fa62005SGreg Kurz } 266860ce86c7SWei Liu } else { 26694d8bc733SJan Dakinevich char *dir_name = g_path_get_dirname(fidp->path.data); 26704d8bc733SJan Dakinevich V9fsPath dir_path; 26714d8bc733SJan Dakinevich 26724d8bc733SJan Dakinevich v9fs_path_init(&dir_path); 26734d8bc733SJan Dakinevich v9fs_path_sprintf(&dir_path, "%s", dir_name); 26744d8bc733SJan Dakinevich g_free(dir_name); 26754d8bc733SJan Dakinevich 26764d8bc733SJan Dakinevich err = v9fs_co_name_to_path(pdu, &dir_path, name->data, &new_path); 26774d8bc733SJan Dakinevich v9fs_path_free(&dir_path); 26784fa62005SGreg Kurz if (err < 0) { 26794fa62005SGreg Kurz goto out; 26804fa62005SGreg Kurz } 268160ce86c7SWei Liu } 268260ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 268360ce86c7SWei Liu if (err < 0) { 268460ce86c7SWei Liu goto out; 268560ce86c7SWei Liu } 268660ce86c7SWei Liu /* 268760ce86c7SWei Liu * Fixup fid's pointing to the old name to 268860ce86c7SWei Liu * start pointing to the new name 268960ce86c7SWei Liu */ 269060ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 269160ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 269260ce86c7SWei Liu /* replace the name */ 269360ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 269460ce86c7SWei Liu } 269560ce86c7SWei Liu } 269660ce86c7SWei Liu out: 269760ce86c7SWei Liu if (dirfidp) { 269860ce86c7SWei Liu put_fid(pdu, dirfidp); 269960ce86c7SWei Liu } 270060ce86c7SWei Liu v9fs_path_free(&new_path); 270160ce86c7SWei Liu out_nofid: 270260ce86c7SWei Liu return err; 270360ce86c7SWei Liu } 270460ce86c7SWei Liu 270560ce86c7SWei Liu /* Only works with path name based fid */ 27068440e22eSGreg Kurz static void coroutine_fn v9fs_rename(void *opaque) 270760ce86c7SWei Liu { 270860ce86c7SWei Liu int32_t fid; 270960ce86c7SWei Liu ssize_t err = 0; 271060ce86c7SWei Liu size_t offset = 7; 271160ce86c7SWei Liu V9fsString name; 271260ce86c7SWei Liu int32_t newdirfid; 271360ce86c7SWei Liu V9fsFidState *fidp; 271460ce86c7SWei Liu V9fsPDU *pdu = opaque; 271560ce86c7SWei Liu V9fsState *s = pdu->s; 271660ce86c7SWei Liu 271760ce86c7SWei Liu v9fs_string_init(&name); 271860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 271960ce86c7SWei Liu if (err < 0) { 272060ce86c7SWei Liu goto out_nofid; 272160ce86c7SWei Liu } 2722fff39a7aSGreg Kurz 2723fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2724fff39a7aSGreg Kurz err = -ENOENT; 2725fff39a7aSGreg Kurz goto out_nofid; 2726fff39a7aSGreg Kurz } 2727fff39a7aSGreg Kurz 2728805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2729805b5d98SGreg Kurz err = -EISDIR; 2730805b5d98SGreg Kurz goto out_nofid; 2731805b5d98SGreg Kurz } 2732805b5d98SGreg Kurz 273360ce86c7SWei Liu fidp = get_fid(pdu, fid); 273460ce86c7SWei Liu if (fidp == NULL) { 273560ce86c7SWei Liu err = -ENOENT; 273660ce86c7SWei Liu goto out_nofid; 273760ce86c7SWei Liu } 273849dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 273949dd946bSGreg Kurz err = -EINVAL; 274049dd946bSGreg Kurz goto out; 274149dd946bSGreg Kurz } 274260ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 274360ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 274460ce86c7SWei Liu err = -EOPNOTSUPP; 274560ce86c7SWei Liu goto out; 274660ce86c7SWei Liu } 274760ce86c7SWei Liu v9fs_path_write_lock(s); 274860ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 274960ce86c7SWei Liu v9fs_path_unlock(s); 275060ce86c7SWei Liu if (!err) { 275160ce86c7SWei Liu err = offset; 275260ce86c7SWei Liu } 275360ce86c7SWei Liu out: 275460ce86c7SWei Liu put_fid(pdu, fidp); 275560ce86c7SWei Liu out_nofid: 275660ce86c7SWei Liu pdu_complete(pdu, err); 275760ce86c7SWei Liu v9fs_string_free(&name); 275860ce86c7SWei Liu } 275960ce86c7SWei Liu 27604fa62005SGreg Kurz static int coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 27618440e22eSGreg Kurz V9fsString *old_name, 27628440e22eSGreg Kurz V9fsPath *newdir, 276360ce86c7SWei Liu V9fsString *new_name) 276460ce86c7SWei Liu { 276560ce86c7SWei Liu V9fsFidState *tfidp; 276660ce86c7SWei Liu V9fsPath oldpath, newpath; 276760ce86c7SWei Liu V9fsState *s = pdu->s; 27684fa62005SGreg Kurz int err; 276960ce86c7SWei Liu 277060ce86c7SWei Liu v9fs_path_init(&oldpath); 277160ce86c7SWei Liu v9fs_path_init(&newpath); 27724fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 27734fa62005SGreg Kurz if (err < 0) { 27744fa62005SGreg Kurz goto out; 27754fa62005SGreg Kurz } 27764fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 27774fa62005SGreg Kurz if (err < 0) { 27784fa62005SGreg Kurz goto out; 27794fa62005SGreg Kurz } 278060ce86c7SWei Liu 278160ce86c7SWei Liu /* 278260ce86c7SWei Liu * Fixup fid's pointing to the old name to 278360ce86c7SWei Liu * start pointing to the new name 278460ce86c7SWei Liu */ 278560ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 278660ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 278760ce86c7SWei Liu /* replace the name */ 278860ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 278960ce86c7SWei Liu } 279060ce86c7SWei Liu } 27914fa62005SGreg Kurz out: 279260ce86c7SWei Liu v9fs_path_free(&oldpath); 279360ce86c7SWei Liu v9fs_path_free(&newpath); 27944fa62005SGreg Kurz return err; 279560ce86c7SWei Liu } 279660ce86c7SWei Liu 27978440e22eSGreg Kurz static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 27988440e22eSGreg Kurz V9fsString *old_name, 27998440e22eSGreg Kurz int32_t newdirfid, 280060ce86c7SWei Liu V9fsString *new_name) 280160ce86c7SWei Liu { 280260ce86c7SWei Liu int err = 0; 280360ce86c7SWei Liu V9fsState *s = pdu->s; 280460ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 280560ce86c7SWei Liu 280660ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 280760ce86c7SWei Liu if (olddirfidp == NULL) { 280860ce86c7SWei Liu err = -ENOENT; 280960ce86c7SWei Liu goto out; 281060ce86c7SWei Liu } 281160ce86c7SWei Liu if (newdirfid != -1) { 281260ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 281360ce86c7SWei Liu if (newdirfidp == NULL) { 281460ce86c7SWei Liu err = -ENOENT; 281560ce86c7SWei Liu goto out; 281660ce86c7SWei Liu } 281760ce86c7SWei Liu } else { 281860ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 281960ce86c7SWei Liu } 282060ce86c7SWei Liu 282160ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 282260ce86c7SWei Liu &newdirfidp->path, new_name); 282360ce86c7SWei Liu if (err < 0) { 282460ce86c7SWei Liu goto out; 282560ce86c7SWei Liu } 282660ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 282760ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 28284fa62005SGreg Kurz err = v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 282960ce86c7SWei Liu &newdirfidp->path, new_name); 283060ce86c7SWei Liu } 283160ce86c7SWei Liu out: 283260ce86c7SWei Liu if (olddirfidp) { 283360ce86c7SWei Liu put_fid(pdu, olddirfidp); 283460ce86c7SWei Liu } 283560ce86c7SWei Liu if (newdirfidp) { 283660ce86c7SWei Liu put_fid(pdu, newdirfidp); 283760ce86c7SWei Liu } 283860ce86c7SWei Liu return err; 283960ce86c7SWei Liu } 284060ce86c7SWei Liu 28418440e22eSGreg Kurz static void coroutine_fn v9fs_renameat(void *opaque) 284260ce86c7SWei Liu { 284360ce86c7SWei Liu ssize_t err = 0; 284460ce86c7SWei Liu size_t offset = 7; 284560ce86c7SWei Liu V9fsPDU *pdu = opaque; 284660ce86c7SWei Liu V9fsState *s = pdu->s; 284760ce86c7SWei Liu int32_t olddirfid, newdirfid; 284860ce86c7SWei Liu V9fsString old_name, new_name; 284960ce86c7SWei Liu 285060ce86c7SWei Liu v9fs_string_init(&old_name); 285160ce86c7SWei Liu v9fs_string_init(&new_name); 285260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 285360ce86c7SWei Liu &old_name, &newdirfid, &new_name); 285460ce86c7SWei Liu if (err < 0) { 285560ce86c7SWei Liu goto out_err; 285660ce86c7SWei Liu } 285760ce86c7SWei Liu 2858fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 2859fff39a7aSGreg Kurz err = -ENOENT; 2860fff39a7aSGreg Kurz goto out_err; 2861fff39a7aSGreg Kurz } 2862fff39a7aSGreg Kurz 2863805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 2864805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 2865805b5d98SGreg Kurz err = -EISDIR; 2866805b5d98SGreg Kurz goto out_err; 2867805b5d98SGreg Kurz } 2868805b5d98SGreg Kurz 286960ce86c7SWei Liu v9fs_path_write_lock(s); 287060ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 287160ce86c7SWei Liu &old_name, newdirfid, &new_name); 287260ce86c7SWei Liu v9fs_path_unlock(s); 287360ce86c7SWei Liu if (!err) { 287460ce86c7SWei Liu err = offset; 287560ce86c7SWei Liu } 287660ce86c7SWei Liu 287760ce86c7SWei Liu out_err: 287860ce86c7SWei Liu pdu_complete(pdu, err); 287960ce86c7SWei Liu v9fs_string_free(&old_name); 288060ce86c7SWei Liu v9fs_string_free(&new_name); 288160ce86c7SWei Liu } 288260ce86c7SWei Liu 28838440e22eSGreg Kurz static void coroutine_fn v9fs_wstat(void *opaque) 288460ce86c7SWei Liu { 288560ce86c7SWei Liu int32_t fid; 288660ce86c7SWei Liu int err = 0; 288760ce86c7SWei Liu int16_t unused; 288860ce86c7SWei Liu V9fsStat v9stat; 288960ce86c7SWei Liu size_t offset = 7; 289060ce86c7SWei Liu struct stat stbuf; 289160ce86c7SWei Liu V9fsFidState *fidp; 289260ce86c7SWei Liu V9fsPDU *pdu = opaque; 28931d203986SGreg Kurz V9fsState *s = pdu->s; 289460ce86c7SWei Liu 289560ce86c7SWei Liu v9fs_stat_init(&v9stat); 289660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 289760ce86c7SWei Liu if (err < 0) { 289860ce86c7SWei Liu goto out_nofid; 289960ce86c7SWei Liu } 290060ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 290160ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 290260ce86c7SWei Liu 290360ce86c7SWei Liu fidp = get_fid(pdu, fid); 290460ce86c7SWei Liu if (fidp == NULL) { 290560ce86c7SWei Liu err = -EINVAL; 290660ce86c7SWei Liu goto out_nofid; 290760ce86c7SWei Liu } 290860ce86c7SWei Liu /* do we need to sync the file? */ 290960ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 291060ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 291160ce86c7SWei Liu goto out; 291260ce86c7SWei Liu } 291360ce86c7SWei Liu if (v9stat.mode != -1) { 291460ce86c7SWei Liu uint32_t v9_mode; 291560ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 291660ce86c7SWei Liu if (err < 0) { 291760ce86c7SWei Liu goto out; 291860ce86c7SWei Liu } 291960ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 292060ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 292160ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 292260ce86c7SWei Liu /* Attempting to change the type */ 292360ce86c7SWei Liu err = -EIO; 292460ce86c7SWei Liu goto out; 292560ce86c7SWei Liu } 292660ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 292760ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 292860ce86c7SWei Liu &v9stat.extension)); 292960ce86c7SWei Liu if (err < 0) { 293060ce86c7SWei Liu goto out; 293160ce86c7SWei Liu } 293260ce86c7SWei Liu } 293360ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 293460ce86c7SWei Liu struct timespec times[2]; 293560ce86c7SWei Liu if (v9stat.atime != -1) { 293660ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 293760ce86c7SWei Liu times[0].tv_nsec = 0; 293860ce86c7SWei Liu } else { 293960ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 294060ce86c7SWei Liu } 294160ce86c7SWei Liu if (v9stat.mtime != -1) { 294260ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 294360ce86c7SWei Liu times[1].tv_nsec = 0; 294460ce86c7SWei Liu } else { 294560ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 294660ce86c7SWei Liu } 294760ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 294860ce86c7SWei Liu if (err < 0) { 294960ce86c7SWei Liu goto out; 295060ce86c7SWei Liu } 295160ce86c7SWei Liu } 295260ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 295360ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 295460ce86c7SWei Liu if (err < 0) { 295560ce86c7SWei Liu goto out; 295660ce86c7SWei Liu } 295760ce86c7SWei Liu } 295860ce86c7SWei Liu if (v9stat.name.size != 0) { 29591d203986SGreg Kurz v9fs_path_write_lock(s); 296060ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 29611d203986SGreg Kurz v9fs_path_unlock(s); 296260ce86c7SWei Liu if (err < 0) { 296360ce86c7SWei Liu goto out; 296460ce86c7SWei Liu } 296560ce86c7SWei Liu } 296660ce86c7SWei Liu if (v9stat.length != -1) { 296760ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 296860ce86c7SWei Liu if (err < 0) { 296960ce86c7SWei Liu goto out; 297060ce86c7SWei Liu } 297160ce86c7SWei Liu } 297260ce86c7SWei Liu err = offset; 297360ce86c7SWei Liu out: 297460ce86c7SWei Liu put_fid(pdu, fidp); 297560ce86c7SWei Liu out_nofid: 297660ce86c7SWei Liu v9fs_stat_free(&v9stat); 297760ce86c7SWei Liu pdu_complete(pdu, err); 297860ce86c7SWei Liu } 297960ce86c7SWei Liu 298060ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 298160ce86c7SWei Liu { 298260ce86c7SWei Liu uint32_t f_type; 298360ce86c7SWei Liu uint32_t f_bsize; 298460ce86c7SWei Liu uint64_t f_blocks; 298560ce86c7SWei Liu uint64_t f_bfree; 298660ce86c7SWei Liu uint64_t f_bavail; 298760ce86c7SWei Liu uint64_t f_files; 298860ce86c7SWei Liu uint64_t f_ffree; 298960ce86c7SWei Liu uint64_t fsid_val; 299060ce86c7SWei Liu uint32_t f_namelen; 299160ce86c7SWei Liu size_t offset = 7; 299260ce86c7SWei Liu int32_t bsize_factor; 299360ce86c7SWei Liu 299460ce86c7SWei Liu /* 299560ce86c7SWei Liu * compute bsize factor based on host file system block size 299660ce86c7SWei Liu * and client msize 299760ce86c7SWei Liu */ 299860ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 299960ce86c7SWei Liu if (!bsize_factor) { 300060ce86c7SWei Liu bsize_factor = 1; 300160ce86c7SWei Liu } 300260ce86c7SWei Liu f_type = stbuf->f_type; 300360ce86c7SWei Liu f_bsize = stbuf->f_bsize; 300460ce86c7SWei Liu f_bsize *= bsize_factor; 300560ce86c7SWei Liu /* 300660ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 300760ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 300860ce86c7SWei Liu * blocks by bsize factor 300960ce86c7SWei Liu */ 301060ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 301160ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 301260ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 301360ce86c7SWei Liu f_files = stbuf->f_files; 301460ce86c7SWei Liu f_ffree = stbuf->f_ffree; 301560ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 301660ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 301760ce86c7SWei Liu f_namelen = stbuf->f_namelen; 301860ce86c7SWei Liu 301960ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 302060ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 302160ce86c7SWei Liu f_bavail, f_files, f_ffree, 302260ce86c7SWei Liu fsid_val, f_namelen); 302360ce86c7SWei Liu } 302460ce86c7SWei Liu 30258440e22eSGreg Kurz static void coroutine_fn v9fs_statfs(void *opaque) 302660ce86c7SWei Liu { 302760ce86c7SWei Liu int32_t fid; 302860ce86c7SWei Liu ssize_t retval = 0; 302960ce86c7SWei Liu size_t offset = 7; 303060ce86c7SWei Liu V9fsFidState *fidp; 303160ce86c7SWei Liu struct statfs stbuf; 303260ce86c7SWei Liu V9fsPDU *pdu = opaque; 303360ce86c7SWei Liu V9fsState *s = pdu->s; 303460ce86c7SWei Liu 303560ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 303660ce86c7SWei Liu if (retval < 0) { 303760ce86c7SWei Liu goto out_nofid; 303860ce86c7SWei Liu } 303960ce86c7SWei Liu fidp = get_fid(pdu, fid); 304060ce86c7SWei Liu if (fidp == NULL) { 304160ce86c7SWei Liu retval = -ENOENT; 304260ce86c7SWei Liu goto out_nofid; 304360ce86c7SWei Liu } 304460ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 304560ce86c7SWei Liu if (retval < 0) { 304660ce86c7SWei Liu goto out; 304760ce86c7SWei Liu } 304860ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 304960ce86c7SWei Liu if (retval < 0) { 305060ce86c7SWei Liu goto out; 305160ce86c7SWei Liu } 305260ce86c7SWei Liu retval += offset; 305360ce86c7SWei Liu out: 305460ce86c7SWei Liu put_fid(pdu, fidp); 305560ce86c7SWei Liu out_nofid: 305660ce86c7SWei Liu pdu_complete(pdu, retval); 305760ce86c7SWei Liu } 305860ce86c7SWei Liu 30598440e22eSGreg Kurz static void coroutine_fn v9fs_mknod(void *opaque) 306060ce86c7SWei Liu { 306160ce86c7SWei Liu 306260ce86c7SWei Liu int mode; 306360ce86c7SWei Liu gid_t gid; 306460ce86c7SWei Liu int32_t fid; 306560ce86c7SWei Liu V9fsQID qid; 306660ce86c7SWei Liu int err = 0; 306760ce86c7SWei Liu int major, minor; 306860ce86c7SWei Liu size_t offset = 7; 306960ce86c7SWei Liu V9fsString name; 307060ce86c7SWei Liu struct stat stbuf; 307160ce86c7SWei Liu V9fsFidState *fidp; 307260ce86c7SWei Liu V9fsPDU *pdu = opaque; 307360ce86c7SWei Liu 307460ce86c7SWei Liu v9fs_string_init(&name); 307560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 307660ce86c7SWei Liu &major, &minor, &gid); 307760ce86c7SWei Liu if (err < 0) { 307860ce86c7SWei Liu goto out_nofid; 307960ce86c7SWei Liu } 308060ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 308160ce86c7SWei Liu 3082fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3083fff39a7aSGreg Kurz err = -ENOENT; 3084fff39a7aSGreg Kurz goto out_nofid; 3085fff39a7aSGreg Kurz } 3086fff39a7aSGreg Kurz 3087805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3088805b5d98SGreg Kurz err = -EEXIST; 3089805b5d98SGreg Kurz goto out_nofid; 3090805b5d98SGreg Kurz } 3091805b5d98SGreg Kurz 309260ce86c7SWei Liu fidp = get_fid(pdu, fid); 309360ce86c7SWei Liu if (fidp == NULL) { 309460ce86c7SWei Liu err = -ENOENT; 309560ce86c7SWei Liu goto out_nofid; 309660ce86c7SWei Liu } 309760ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 309860ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 309960ce86c7SWei Liu if (err < 0) { 310060ce86c7SWei Liu goto out; 310160ce86c7SWei Liu } 3102*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 3103*3b5ee9e8SAntonios Motakis if (err < 0) { 3104*3b5ee9e8SAntonios Motakis goto out; 3105*3b5ee9e8SAntonios Motakis } 310660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 310760ce86c7SWei Liu if (err < 0) { 310860ce86c7SWei Liu goto out; 310960ce86c7SWei Liu } 311060ce86c7SWei Liu err += offset; 311160ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 311260ce86c7SWei Liu qid.type, qid.version, qid.path); 311360ce86c7SWei Liu out: 311460ce86c7SWei Liu put_fid(pdu, fidp); 311560ce86c7SWei Liu out_nofid: 311660ce86c7SWei Liu pdu_complete(pdu, err); 311760ce86c7SWei Liu v9fs_string_free(&name); 311860ce86c7SWei Liu } 311960ce86c7SWei Liu 312060ce86c7SWei Liu /* 312160ce86c7SWei Liu * Implement posix byte range locking code 312260ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 312360ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 312460ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 312560ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 312660ce86c7SWei Liu * So when a TLOCK request comes, always return success 312760ce86c7SWei Liu */ 31288440e22eSGreg Kurz static void coroutine_fn v9fs_lock(void *opaque) 312960ce86c7SWei Liu { 313060ce86c7SWei Liu V9fsFlock flock; 313160ce86c7SWei Liu size_t offset = 7; 313260ce86c7SWei Liu struct stat stbuf; 313360ce86c7SWei Liu V9fsFidState *fidp; 313460ce86c7SWei Liu int32_t fid, err = 0; 313560ce86c7SWei Liu V9fsPDU *pdu = opaque; 313660ce86c7SWei Liu 313760ce86c7SWei Liu v9fs_string_init(&flock.client_id); 313860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 313960ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 314060ce86c7SWei Liu &flock.proc_id, &flock.client_id); 314160ce86c7SWei Liu if (err < 0) { 314260ce86c7SWei Liu goto out_nofid; 314360ce86c7SWei Liu } 314460ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 314560ce86c7SWei Liu flock.type, flock.start, flock.length); 314660ce86c7SWei Liu 314760ce86c7SWei Liu 314860ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 314960ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 315060ce86c7SWei Liu err = -EINVAL; 315160ce86c7SWei Liu goto out_nofid; 315260ce86c7SWei Liu } 315360ce86c7SWei Liu fidp = get_fid(pdu, fid); 315460ce86c7SWei Liu if (fidp == NULL) { 315560ce86c7SWei Liu err = -ENOENT; 315660ce86c7SWei Liu goto out_nofid; 315760ce86c7SWei Liu } 315860ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 315960ce86c7SWei Liu if (err < 0) { 316060ce86c7SWei Liu goto out; 316160ce86c7SWei Liu } 31624bae2b39SPaolo Bonzini err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); 31634bae2b39SPaolo Bonzini if (err < 0) { 31644bae2b39SPaolo Bonzini goto out; 31654bae2b39SPaolo Bonzini } 31664bae2b39SPaolo Bonzini err += offset; 31674bae2b39SPaolo Bonzini trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); 316860ce86c7SWei Liu out: 316960ce86c7SWei Liu put_fid(pdu, fidp); 317060ce86c7SWei Liu out_nofid: 317160ce86c7SWei Liu pdu_complete(pdu, err); 317260ce86c7SWei Liu v9fs_string_free(&flock.client_id); 317360ce86c7SWei Liu } 317460ce86c7SWei Liu 317560ce86c7SWei Liu /* 317660ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 317760ce86c7SWei Liu * handling is done by client's VFS layer. 317860ce86c7SWei Liu */ 31798440e22eSGreg Kurz static void coroutine_fn v9fs_getlock(void *opaque) 318060ce86c7SWei Liu { 318160ce86c7SWei Liu size_t offset = 7; 318260ce86c7SWei Liu struct stat stbuf; 318360ce86c7SWei Liu V9fsFidState *fidp; 318460ce86c7SWei Liu V9fsGetlock glock; 318560ce86c7SWei Liu int32_t fid, err = 0; 318660ce86c7SWei Liu V9fsPDU *pdu = opaque; 318760ce86c7SWei Liu 318860ce86c7SWei Liu v9fs_string_init(&glock.client_id); 318960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 319060ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 319160ce86c7SWei Liu &glock.client_id); 319260ce86c7SWei Liu if (err < 0) { 319360ce86c7SWei Liu goto out_nofid; 319460ce86c7SWei Liu } 319560ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 319660ce86c7SWei Liu glock.type, glock.start, glock.length); 319760ce86c7SWei Liu 319860ce86c7SWei Liu fidp = get_fid(pdu, fid); 319960ce86c7SWei Liu if (fidp == NULL) { 320060ce86c7SWei Liu err = -ENOENT; 320160ce86c7SWei Liu goto out_nofid; 320260ce86c7SWei Liu } 320360ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 320460ce86c7SWei Liu if (err < 0) { 320560ce86c7SWei Liu goto out; 320660ce86c7SWei Liu } 320760ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 320860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 320960ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 321060ce86c7SWei Liu &glock.client_id); 321160ce86c7SWei Liu if (err < 0) { 321260ce86c7SWei Liu goto out; 321360ce86c7SWei Liu } 321460ce86c7SWei Liu err += offset; 321560ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 321660ce86c7SWei Liu glock.length, glock.proc_id); 321760ce86c7SWei Liu out: 321860ce86c7SWei Liu put_fid(pdu, fidp); 321960ce86c7SWei Liu out_nofid: 322060ce86c7SWei Liu pdu_complete(pdu, err); 322160ce86c7SWei Liu v9fs_string_free(&glock.client_id); 322260ce86c7SWei Liu } 322360ce86c7SWei Liu 32248440e22eSGreg Kurz static void coroutine_fn v9fs_mkdir(void *opaque) 322560ce86c7SWei Liu { 322660ce86c7SWei Liu V9fsPDU *pdu = opaque; 322760ce86c7SWei Liu size_t offset = 7; 322860ce86c7SWei Liu int32_t fid; 322960ce86c7SWei Liu struct stat stbuf; 323060ce86c7SWei Liu V9fsQID qid; 323160ce86c7SWei Liu V9fsString name; 323260ce86c7SWei Liu V9fsFidState *fidp; 323360ce86c7SWei Liu gid_t gid; 323460ce86c7SWei Liu int mode; 323560ce86c7SWei Liu int err = 0; 323660ce86c7SWei Liu 323760ce86c7SWei Liu v9fs_string_init(&name); 323860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 323960ce86c7SWei Liu if (err < 0) { 324060ce86c7SWei Liu goto out_nofid; 324160ce86c7SWei Liu } 324260ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 324360ce86c7SWei Liu 3244fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3245fff39a7aSGreg Kurz err = -ENOENT; 3246fff39a7aSGreg Kurz goto out_nofid; 3247fff39a7aSGreg Kurz } 3248fff39a7aSGreg Kurz 3249805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3250805b5d98SGreg Kurz err = -EEXIST; 3251805b5d98SGreg Kurz goto out_nofid; 3252805b5d98SGreg Kurz } 3253805b5d98SGreg Kurz 325460ce86c7SWei Liu fidp = get_fid(pdu, fid); 325560ce86c7SWei Liu if (fidp == NULL) { 325660ce86c7SWei Liu err = -ENOENT; 325760ce86c7SWei Liu goto out_nofid; 325860ce86c7SWei Liu } 325960ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 326060ce86c7SWei Liu if (err < 0) { 326160ce86c7SWei Liu goto out; 326260ce86c7SWei Liu } 3263*3b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 3264*3b5ee9e8SAntonios Motakis if (err < 0) { 3265*3b5ee9e8SAntonios Motakis goto out; 3266*3b5ee9e8SAntonios Motakis } 326760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 326860ce86c7SWei Liu if (err < 0) { 326960ce86c7SWei Liu goto out; 327060ce86c7SWei Liu } 327160ce86c7SWei Liu err += offset; 327260ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 327360ce86c7SWei Liu qid.type, qid.version, qid.path, err); 327460ce86c7SWei Liu out: 327560ce86c7SWei Liu put_fid(pdu, fidp); 327660ce86c7SWei Liu out_nofid: 327760ce86c7SWei Liu pdu_complete(pdu, err); 327860ce86c7SWei Liu v9fs_string_free(&name); 327960ce86c7SWei Liu } 328060ce86c7SWei Liu 32818440e22eSGreg Kurz static void coroutine_fn v9fs_xattrwalk(void *opaque) 328260ce86c7SWei Liu { 328360ce86c7SWei Liu int64_t size; 328460ce86c7SWei Liu V9fsString name; 328560ce86c7SWei Liu ssize_t err = 0; 328660ce86c7SWei Liu size_t offset = 7; 328760ce86c7SWei Liu int32_t fid, newfid; 328860ce86c7SWei Liu V9fsFidState *file_fidp; 328960ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 329060ce86c7SWei Liu V9fsPDU *pdu = opaque; 329160ce86c7SWei Liu V9fsState *s = pdu->s; 329260ce86c7SWei Liu 329360ce86c7SWei Liu v9fs_string_init(&name); 329460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 329560ce86c7SWei Liu if (err < 0) { 329660ce86c7SWei Liu goto out_nofid; 329760ce86c7SWei Liu } 329860ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 329960ce86c7SWei Liu 330060ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 330160ce86c7SWei Liu if (file_fidp == NULL) { 330260ce86c7SWei Liu err = -ENOENT; 330360ce86c7SWei Liu goto out_nofid; 330460ce86c7SWei Liu } 330560ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 330660ce86c7SWei Liu if (xattr_fidp == NULL) { 330760ce86c7SWei Liu err = -EINVAL; 330860ce86c7SWei Liu goto out; 330960ce86c7SWei Liu } 331060ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 3311ba42ebb8SLi Qiang if (!v9fs_string_size(&name)) { 331260ce86c7SWei Liu /* 331360ce86c7SWei Liu * listxattr request. Get the size first 331460ce86c7SWei Liu */ 331560ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 331660ce86c7SWei Liu if (size < 0) { 331760ce86c7SWei Liu err = size; 331860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 331960ce86c7SWei Liu goto out; 332060ce86c7SWei Liu } 332160ce86c7SWei Liu /* 332260ce86c7SWei Liu * Read the xattr value 332360ce86c7SWei Liu */ 332460ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 332560ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3326dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 33277bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3328a647502cSKeno Fischer if (size) { 332960ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 333060ce86c7SWei Liu xattr_fidp->fs.xattr.value, 333160ce86c7SWei Liu xattr_fidp->fs.xattr.len); 333260ce86c7SWei Liu if (err < 0) { 333360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 333460ce86c7SWei Liu goto out; 333560ce86c7SWei Liu } 333660ce86c7SWei Liu } 333760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 333860ce86c7SWei Liu if (err < 0) { 333960ce86c7SWei Liu goto out; 334060ce86c7SWei Liu } 334160ce86c7SWei Liu err += offset; 334260ce86c7SWei Liu } else { 334360ce86c7SWei Liu /* 334460ce86c7SWei Liu * specific xattr fid. We check for xattr 334560ce86c7SWei Liu * presence also collect the xattr size 334660ce86c7SWei Liu */ 334760ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 334860ce86c7SWei Liu &name, NULL, 0); 334960ce86c7SWei Liu if (size < 0) { 335060ce86c7SWei Liu err = size; 335160ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 335260ce86c7SWei Liu goto out; 335360ce86c7SWei Liu } 335460ce86c7SWei Liu /* 335560ce86c7SWei Liu * Read the xattr value 335660ce86c7SWei Liu */ 335760ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 335860ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3359dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 33607bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3361a647502cSKeno Fischer if (size) { 336260ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 336360ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 336460ce86c7SWei Liu xattr_fidp->fs.xattr.len); 336560ce86c7SWei Liu if (err < 0) { 336660ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 336760ce86c7SWei Liu goto out; 336860ce86c7SWei Liu } 336960ce86c7SWei Liu } 337060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 337160ce86c7SWei Liu if (err < 0) { 337260ce86c7SWei Liu goto out; 337360ce86c7SWei Liu } 337460ce86c7SWei Liu err += offset; 337560ce86c7SWei Liu } 337660ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 337760ce86c7SWei Liu out: 337860ce86c7SWei Liu put_fid(pdu, file_fidp); 337960ce86c7SWei Liu if (xattr_fidp) { 338060ce86c7SWei Liu put_fid(pdu, xattr_fidp); 338160ce86c7SWei Liu } 338260ce86c7SWei Liu out_nofid: 338360ce86c7SWei Liu pdu_complete(pdu, err); 338460ce86c7SWei Liu v9fs_string_free(&name); 338560ce86c7SWei Liu } 338660ce86c7SWei Liu 33878440e22eSGreg Kurz static void coroutine_fn v9fs_xattrcreate(void *opaque) 338860ce86c7SWei Liu { 3389aca6897fSKeno Fischer int flags, rflags = 0; 339060ce86c7SWei Liu int32_t fid; 33913b79ef2cSGreg Kurz uint64_t size; 339260ce86c7SWei Liu ssize_t err = 0; 339360ce86c7SWei Liu V9fsString name; 339460ce86c7SWei Liu size_t offset = 7; 339560ce86c7SWei Liu V9fsFidState *file_fidp; 339660ce86c7SWei Liu V9fsFidState *xattr_fidp; 339760ce86c7SWei Liu V9fsPDU *pdu = opaque; 339860ce86c7SWei Liu 339960ce86c7SWei Liu v9fs_string_init(&name); 340060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 340160ce86c7SWei Liu if (err < 0) { 340260ce86c7SWei Liu goto out_nofid; 340360ce86c7SWei Liu } 340460ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 340560ce86c7SWei Liu 3406aca6897fSKeno Fischer if (flags & ~(P9_XATTR_CREATE | P9_XATTR_REPLACE)) { 3407aca6897fSKeno Fischer err = -EINVAL; 3408aca6897fSKeno Fischer goto out_nofid; 3409aca6897fSKeno Fischer } 3410aca6897fSKeno Fischer 3411aca6897fSKeno Fischer if (flags & P9_XATTR_CREATE) { 3412aca6897fSKeno Fischer rflags |= XATTR_CREATE; 3413aca6897fSKeno Fischer } 3414aca6897fSKeno Fischer 3415aca6897fSKeno Fischer if (flags & P9_XATTR_REPLACE) { 3416aca6897fSKeno Fischer rflags |= XATTR_REPLACE; 3417aca6897fSKeno Fischer } 3418aca6897fSKeno Fischer 34193b79ef2cSGreg Kurz if (size > XATTR_SIZE_MAX) { 34203b79ef2cSGreg Kurz err = -E2BIG; 34213b79ef2cSGreg Kurz goto out_nofid; 34223b79ef2cSGreg Kurz } 34233b79ef2cSGreg Kurz 342460ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 342560ce86c7SWei Liu if (file_fidp == NULL) { 342660ce86c7SWei Liu err = -EINVAL; 342760ce86c7SWei Liu goto out_nofid; 342860ce86c7SWei Liu } 3429dd654e03SGreg Kurz if (file_fidp->fid_type != P9_FID_NONE) { 3430dd654e03SGreg Kurz err = -EINVAL; 3431dd654e03SGreg Kurz goto out_put_fid; 3432dd654e03SGreg Kurz } 3433dd654e03SGreg Kurz 343460ce86c7SWei Liu /* Make the file fid point to xattr */ 343560ce86c7SWei Liu xattr_fidp = file_fidp; 343660ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 343760ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 3438dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = false; 343960ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 3440aca6897fSKeno Fischer xattr_fidp->fs.xattr.flags = rflags; 344160ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 344260ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 3443eb687602SLi Qiang xattr_fidp->fs.xattr.value = g_malloc0(size); 344460ce86c7SWei Liu err = offset; 3445dd654e03SGreg Kurz out_put_fid: 344660ce86c7SWei Liu put_fid(pdu, file_fidp); 344760ce86c7SWei Liu out_nofid: 344860ce86c7SWei Liu pdu_complete(pdu, err); 344960ce86c7SWei Liu v9fs_string_free(&name); 345060ce86c7SWei Liu } 345160ce86c7SWei Liu 34528440e22eSGreg Kurz static void coroutine_fn v9fs_readlink(void *opaque) 345360ce86c7SWei Liu { 345460ce86c7SWei Liu V9fsPDU *pdu = opaque; 345560ce86c7SWei Liu size_t offset = 7; 345660ce86c7SWei Liu V9fsString target; 345760ce86c7SWei Liu int32_t fid; 345860ce86c7SWei Liu int err = 0; 345960ce86c7SWei Liu V9fsFidState *fidp; 346060ce86c7SWei Liu 346160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 346260ce86c7SWei Liu if (err < 0) { 346360ce86c7SWei Liu goto out_nofid; 346460ce86c7SWei Liu } 346560ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 346660ce86c7SWei Liu fidp = get_fid(pdu, fid); 346760ce86c7SWei Liu if (fidp == NULL) { 346860ce86c7SWei Liu err = -ENOENT; 346960ce86c7SWei Liu goto out_nofid; 347060ce86c7SWei Liu } 347160ce86c7SWei Liu 347260ce86c7SWei Liu v9fs_string_init(&target); 347360ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 347460ce86c7SWei Liu if (err < 0) { 347560ce86c7SWei Liu goto out; 347660ce86c7SWei Liu } 347760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 347860ce86c7SWei Liu if (err < 0) { 347960ce86c7SWei Liu v9fs_string_free(&target); 348060ce86c7SWei Liu goto out; 348160ce86c7SWei Liu } 348260ce86c7SWei Liu err += offset; 348360ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 348460ce86c7SWei Liu v9fs_string_free(&target); 348560ce86c7SWei Liu out: 348660ce86c7SWei Liu put_fid(pdu, fidp); 348760ce86c7SWei Liu out_nofid: 348860ce86c7SWei Liu pdu_complete(pdu, err); 348960ce86c7SWei Liu } 349060ce86c7SWei Liu 349160ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 349260ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 349360ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 349460ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 349560ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 349660ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 349760ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 349860ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 349960ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 350060ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 350160ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 350260ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 350360ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 350460ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 350560ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 350660ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 350760ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 350860ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 350960ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 351060ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 351160ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 351260ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 351360ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 351460ce86c7SWei Liu [P9_TREAD] = v9fs_read, 351560ce86c7SWei Liu #if 0 351660ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 351760ce86c7SWei Liu #endif 351860ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 351960ce86c7SWei Liu [P9_TLINK] = v9fs_link, 352060ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 352160ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 352260ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 352360ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 352460ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 352560ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 352660ce86c7SWei Liu }; 352760ce86c7SWei Liu 35288440e22eSGreg Kurz static void coroutine_fn v9fs_op_not_supp(void *opaque) 352960ce86c7SWei Liu { 353060ce86c7SWei Liu V9fsPDU *pdu = opaque; 353160ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 353260ce86c7SWei Liu } 353360ce86c7SWei Liu 35348440e22eSGreg Kurz static void coroutine_fn v9fs_fs_ro(void *opaque) 353560ce86c7SWei Liu { 353660ce86c7SWei Liu V9fsPDU *pdu = opaque; 353760ce86c7SWei Liu pdu_complete(pdu, -EROFS); 353860ce86c7SWei Liu } 353960ce86c7SWei Liu 354060ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 354160ce86c7SWei Liu { 354260ce86c7SWei Liu switch (pdu->id) { 354360ce86c7SWei Liu case P9_TREADDIR: 354460ce86c7SWei Liu case P9_TSTATFS: 354560ce86c7SWei Liu case P9_TGETATTR: 354660ce86c7SWei Liu case P9_TXATTRWALK: 354760ce86c7SWei Liu case P9_TLOCK: 354860ce86c7SWei Liu case P9_TGETLOCK: 354960ce86c7SWei Liu case P9_TREADLINK: 355060ce86c7SWei Liu case P9_TVERSION: 355160ce86c7SWei Liu case P9_TLOPEN: 355260ce86c7SWei Liu case P9_TATTACH: 355360ce86c7SWei Liu case P9_TSTAT: 355460ce86c7SWei Liu case P9_TWALK: 355560ce86c7SWei Liu case P9_TCLUNK: 355660ce86c7SWei Liu case P9_TFSYNC: 355760ce86c7SWei Liu case P9_TOPEN: 355860ce86c7SWei Liu case P9_TREAD: 355960ce86c7SWei Liu case P9_TAUTH: 356060ce86c7SWei Liu case P9_TFLUSH: 356160ce86c7SWei Liu return 1; 356260ce86c7SWei Liu default: 356360ce86c7SWei Liu return 0; 356460ce86c7SWei Liu } 356560ce86c7SWei Liu } 356660ce86c7SWei Liu 3567506f3275SGreg Kurz void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr) 356860ce86c7SWei Liu { 356960ce86c7SWei Liu Coroutine *co; 357060ce86c7SWei Liu CoroutineEntry *handler; 357160ce86c7SWei Liu V9fsState *s = pdu->s; 357260ce86c7SWei Liu 3573506f3275SGreg Kurz pdu->size = le32_to_cpu(hdr->size_le); 3574506f3275SGreg Kurz pdu->id = hdr->id; 3575506f3275SGreg Kurz pdu->tag = le16_to_cpu(hdr->tag_le); 3576506f3275SGreg Kurz 357760ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 357860ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 357960ce86c7SWei Liu handler = v9fs_op_not_supp; 3580d1471233SGreg Kurz } else if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 3581d1471233SGreg Kurz handler = v9fs_fs_ro; 358260ce86c7SWei Liu } else { 358360ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 358460ce86c7SWei Liu } 358560ce86c7SWei Liu 3586506f3275SGreg Kurz qemu_co_queue_init(&pdu->complete); 35870b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 35880b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 358960ce86c7SWei Liu } 359060ce86c7SWei Liu 35912a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 3592066eb006SGreg Kurz int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t, 3593066eb006SGreg Kurz Error **errp) 35942a0c56aaSWei Liu { 35952a0c56aaSWei Liu int i, len; 35962a0c56aaSWei Liu struct stat stat; 35972a0c56aaSWei Liu FsDriverEntry *fse; 35982a0c56aaSWei Liu V9fsPath path; 35992a0c56aaSWei Liu int rc = 1; 36002a0c56aaSWei Liu 3601066eb006SGreg Kurz assert(!s->transport); 3602066eb006SGreg Kurz s->transport = t; 3603066eb006SGreg Kurz 36042a0c56aaSWei Liu /* initialize pdu allocator */ 36052a0c56aaSWei Liu QLIST_INIT(&s->free_list); 36062a0c56aaSWei Liu QLIST_INIT(&s->active_list); 36070d78289cSGreg Kurz for (i = 0; i < MAX_REQ; i++) { 3608583f21f8SStefano Stabellini QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 3609583f21f8SStefano Stabellini s->pdus[i].s = s; 3610583f21f8SStefano Stabellini s->pdus[i].idx = i; 36112a0c56aaSWei Liu } 36122a0c56aaSWei Liu 36132a0c56aaSWei Liu v9fs_path_init(&path); 36142a0c56aaSWei Liu 36152a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 36162a0c56aaSWei Liu 36172a0c56aaSWei Liu if (!fse) { 36182a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 36192a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 36202a0c56aaSWei Liu "id = %s", 36212a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 36222a0c56aaSWei Liu goto out; 36232a0c56aaSWei Liu } 36242a0c56aaSWei Liu 36252a0c56aaSWei Liu if (!s->fsconf.tag) { 36262a0c56aaSWei Liu /* we haven't specified a mount_tag */ 36272a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 36282a0c56aaSWei Liu s->fsconf.fsdev_id); 36292a0c56aaSWei Liu goto out; 36302a0c56aaSWei Liu } 36312a0c56aaSWei Liu 36322a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 36332a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 36342a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 36352a0c56aaSWei Liu len = strlen(s->fsconf.tag); 36362a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 36372a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 36382a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 36392a0c56aaSWei Liu goto out; 36402a0c56aaSWei Liu } 36412a0c56aaSWei Liu 36422a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 36432a0c56aaSWei Liu s->ctx.uid = -1; 36442a0c56aaSWei Liu 36452a0c56aaSWei Liu s->ops = fse->ops; 36462a0c56aaSWei Liu 3647b96feb2cSTobias Schramm s->ctx.fmode = fse->fmode; 3648b96feb2cSTobias Schramm s->ctx.dmode = fse->dmode; 3649b96feb2cSTobias Schramm 36502a0c56aaSWei Liu s->fid_list = NULL; 36512a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 36522a0c56aaSWei Liu 365365603a80SGreg Kurz if (s->ops->init(&s->ctx, errp) < 0) { 365465603a80SGreg Kurz error_prepend(errp, "cannot initialize fsdev '%s': ", 365565603a80SGreg Kurz s->fsconf.fsdev_id); 36562a0c56aaSWei Liu goto out; 36572a0c56aaSWei Liu } 36582a0c56aaSWei Liu 36592a0c56aaSWei Liu /* 36602a0c56aaSWei Liu * Check details of export path, We need to use fs driver 36612a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 36622a0c56aaSWei Liu * use co-routines here. 36632a0c56aaSWei Liu */ 36642a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 36652a0c56aaSWei Liu error_setg(errp, 36662a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 36672a0c56aaSWei Liu goto out; 36682a0c56aaSWei Liu } 36692a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 36702a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 36712a0c56aaSWei Liu goto out; 36722a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 36732a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 36742a0c56aaSWei Liu goto out; 36752a0c56aaSWei Liu } 3676b8bbdb88SPradeep Jagadeesh 3677*3b5ee9e8SAntonios Motakis s->dev_id = stat.st_dev; 3678*3b5ee9e8SAntonios Motakis 3679b8bbdb88SPradeep Jagadeesh s->ctx.fst = &fse->fst; 3680b8bbdb88SPradeep Jagadeesh fsdev_throttle_init(s->ctx.fst); 3681b8bbdb88SPradeep Jagadeesh 36822a0c56aaSWei Liu rc = 0; 36832a0c56aaSWei Liu out: 36842a0c56aaSWei Liu if (rc) { 3685c0da0cb7SGreg Kurz v9fs_device_unrealize_common(s, NULL); 3686702dbcc2SLi Qiang } 36872a0c56aaSWei Liu v9fs_path_free(&path); 36882a0c56aaSWei Liu return rc; 36892a0c56aaSWei Liu } 36902a0c56aaSWei Liu 36912a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 36922a0c56aaSWei Liu { 3693c0da0cb7SGreg Kurz if (s->ops && s->ops->cleanup) { 3694702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3695702dbcc2SLi Qiang } 3696c0da0cb7SGreg Kurz if (s->ctx.fst) { 3697b8bbdb88SPradeep Jagadeesh fsdev_throttle_cleanup(s->ctx.fst); 3698c0da0cb7SGreg Kurz } 36992a0c56aaSWei Liu g_free(s->tag); 37004774718eSLi Qiang g_free(s->ctx.fs_root); 37012a0c56aaSWei Liu } 37022a0c56aaSWei Liu 37030e44a0fdSGreg Kurz typedef struct VirtfsCoResetData { 37040e44a0fdSGreg Kurz V9fsPDU pdu; 37050e44a0fdSGreg Kurz bool done; 37060e44a0fdSGreg Kurz } VirtfsCoResetData; 37070e44a0fdSGreg Kurz 37080e44a0fdSGreg Kurz static void coroutine_fn virtfs_co_reset(void *opaque) 37090e44a0fdSGreg Kurz { 37100e44a0fdSGreg Kurz VirtfsCoResetData *data = opaque; 37110e44a0fdSGreg Kurz 37120e44a0fdSGreg Kurz virtfs_reset(&data->pdu); 37130e44a0fdSGreg Kurz data->done = true; 37140e44a0fdSGreg Kurz } 37150e44a0fdSGreg Kurz 37160e44a0fdSGreg Kurz void v9fs_reset(V9fsState *s) 37170e44a0fdSGreg Kurz { 37180e44a0fdSGreg Kurz VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; 37190e44a0fdSGreg Kurz Coroutine *co; 37200e44a0fdSGreg Kurz 37210e44a0fdSGreg Kurz while (!QLIST_EMPTY(&s->active_list)) { 37220e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 37230e44a0fdSGreg Kurz } 37240e44a0fdSGreg Kurz 37250e44a0fdSGreg Kurz co = qemu_coroutine_create(virtfs_co_reset, &data); 37260e44a0fdSGreg Kurz qemu_coroutine_enter(co); 37270e44a0fdSGreg Kurz 37280e44a0fdSGreg Kurz while (!data.done) { 37290e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 37300e44a0fdSGreg Kurz } 37310e44a0fdSGreg Kurz } 37320e44a0fdSGreg Kurz 373360ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 373460ce86c7SWei Liu { 373560ce86c7SWei Liu struct rlimit rlim; 373660ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 373763325b18SGreg Kurz error_report("Failed to get the resource limit"); 373860ce86c7SWei Liu exit(1); 373960ce86c7SWei Liu } 374060ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 374160ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 374260ce86c7SWei Liu } 3743