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 */ 57660ce86c7SWei Liu static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) 57760ce86c7SWei Liu { 57860ce86c7SWei Liu size_t size; 57960ce86c7SWei Liu 58060ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 58160ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 58260ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 58360ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 58460ce86c7SWei Liu qidp->type = 0; 58560ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 58660ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 58760ce86c7SWei Liu } 58860ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 58960ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 59060ce86c7SWei Liu } 59160ce86c7SWei Liu } 59260ce86c7SWei Liu 5938440e22eSGreg Kurz static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 5948440e22eSGreg Kurz V9fsQID *qidp) 59560ce86c7SWei Liu { 59660ce86c7SWei Liu struct stat stbuf; 59760ce86c7SWei Liu int err; 59860ce86c7SWei Liu 59960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 60060ce86c7SWei Liu if (err < 0) { 60160ce86c7SWei Liu return err; 60260ce86c7SWei Liu } 60360ce86c7SWei Liu stat_to_qid(&stbuf, qidp); 60460ce86c7SWei Liu return 0; 60560ce86c7SWei Liu } 60660ce86c7SWei Liu 60760ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 60860ce86c7SWei Liu { 60960ce86c7SWei Liu V9fsPDU *pdu = NULL; 61060ce86c7SWei Liu 61160ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 61260ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 61360ce86c7SWei Liu QLIST_REMOVE(pdu, next); 61460ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 61560ce86c7SWei Liu } 61660ce86c7SWei Liu return pdu; 61760ce86c7SWei Liu } 61860ce86c7SWei Liu 61960ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 62060ce86c7SWei Liu { 62160ce86c7SWei Liu V9fsState *s = pdu->s; 622f74e27bfSGreg Kurz 623f74e27bfSGreg Kurz g_assert(!pdu->cancelled); 62460ce86c7SWei Liu QLIST_REMOVE(pdu, next); 62560ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 62660ce86c7SWei Liu } 62760ce86c7SWei Liu 6288440e22eSGreg Kurz static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) 62960ce86c7SWei Liu { 63060ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 63160ce86c7SWei Liu V9fsState *s = pdu->s; 63206a37db7SGreg Kurz int ret; 63360ce86c7SWei Liu 634fc78d5eeSKeno Fischer /* 635fc78d5eeSKeno Fischer * The 9p spec requires that successfully cancelled pdus receive no reply. 636fc78d5eeSKeno Fischer * Sending a reply would confuse clients because they would 637fc78d5eeSKeno Fischer * assume that any EINTR is the actual result of the operation, 638fc78d5eeSKeno Fischer * rather than a consequence of the cancellation. However, if 639fc78d5eeSKeno Fischer * the operation completed (succesfully or with an error other 640fc78d5eeSKeno Fischer * than caused be cancellation), we do send out that reply, both 641fc78d5eeSKeno Fischer * for efficiency and to avoid confusing the rest of the state machine 642fc78d5eeSKeno Fischer * that assumes passing a non-error here will mean a successful 643fc78d5eeSKeno Fischer * transmission of the reply. 644fc78d5eeSKeno Fischer */ 645fc78d5eeSKeno Fischer bool discard = pdu->cancelled && len == -EINTR; 646fc78d5eeSKeno Fischer if (discard) { 647fc78d5eeSKeno Fischer trace_v9fs_rcancel(pdu->tag, pdu->id); 648fc78d5eeSKeno Fischer pdu->size = 0; 649fc78d5eeSKeno Fischer goto out_notify; 650fc78d5eeSKeno Fischer } 651fc78d5eeSKeno Fischer 65260ce86c7SWei Liu if (len < 0) { 65360ce86c7SWei Liu int err = -len; 65460ce86c7SWei Liu len = 7; 65560ce86c7SWei Liu 65660ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 65760ce86c7SWei Liu V9fsString str; 65860ce86c7SWei Liu 65960ce86c7SWei Liu str.data = strerror(err); 66060ce86c7SWei Liu str.size = strlen(str.data); 66160ce86c7SWei Liu 66206a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "s", &str); 66306a37db7SGreg Kurz if (ret < 0) { 66406a37db7SGreg Kurz goto out_notify; 66506a37db7SGreg Kurz } 66606a37db7SGreg Kurz len += ret; 66760ce86c7SWei Liu id = P9_RERROR; 66860ce86c7SWei Liu } 66960ce86c7SWei Liu 67006a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "d", err); 67106a37db7SGreg Kurz if (ret < 0) { 67206a37db7SGreg Kurz goto out_notify; 67306a37db7SGreg Kurz } 67406a37db7SGreg Kurz len += ret; 67560ce86c7SWei Liu 67660ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 67760ce86c7SWei Liu id = P9_RLERROR; 67860ce86c7SWei Liu } 67960ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 68060ce86c7SWei Liu } 68160ce86c7SWei Liu 68260ce86c7SWei Liu /* fill out the header */ 68306a37db7SGreg Kurz if (pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag) < 0) { 68406a37db7SGreg Kurz goto out_notify; 68506a37db7SGreg Kurz } 68660ce86c7SWei Liu 68760ce86c7SWei Liu /* keep these in sync */ 68860ce86c7SWei Liu pdu->size = len; 68960ce86c7SWei Liu pdu->id = id; 69060ce86c7SWei Liu 69106a37db7SGreg Kurz out_notify: 692a17d8659SGreg Kurz pdu->s->transport->push_and_notify(pdu); 69360ce86c7SWei Liu 69460ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 695f74e27bfSGreg Kurz if (!qemu_co_queue_next(&pdu->complete)) { 69660ce86c7SWei Liu pdu_free(pdu); 69760ce86c7SWei Liu } 698f74e27bfSGreg Kurz } 69960ce86c7SWei Liu 70060ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 70160ce86c7SWei Liu { 70260ce86c7SWei Liu mode_t ret; 70360ce86c7SWei Liu 70460ce86c7SWei Liu ret = mode & 0777; 70560ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 70660ce86c7SWei Liu ret |= S_IFDIR; 70760ce86c7SWei Liu } 70860ce86c7SWei Liu 70960ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 71060ce86c7SWei Liu ret |= S_IFLNK; 71160ce86c7SWei Liu } 71260ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 71360ce86c7SWei Liu ret |= S_IFSOCK; 71460ce86c7SWei Liu } 71560ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 71660ce86c7SWei Liu ret |= S_IFIFO; 71760ce86c7SWei Liu } 71860ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 71960ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 72060ce86c7SWei Liu ret |= S_IFCHR; 72160ce86c7SWei Liu } else { 72260ce86c7SWei Liu ret |= S_IFBLK; 72360ce86c7SWei Liu } 72460ce86c7SWei Liu } 72560ce86c7SWei Liu 72660ce86c7SWei Liu if (!(ret&~0777)) { 72760ce86c7SWei Liu ret |= S_IFREG; 72860ce86c7SWei Liu } 72960ce86c7SWei Liu 73060ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 73160ce86c7SWei Liu ret |= S_ISUID; 73260ce86c7SWei Liu } 73360ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 73460ce86c7SWei Liu ret |= S_ISGID; 73560ce86c7SWei Liu } 73660ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 73760ce86c7SWei Liu ret |= S_ISVTX; 73860ce86c7SWei Liu } 73960ce86c7SWei Liu 74060ce86c7SWei Liu return ret; 74160ce86c7SWei Liu } 74260ce86c7SWei Liu 74360ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 74460ce86c7SWei Liu { 74560ce86c7SWei Liu if (stat->type == -1 && 74660ce86c7SWei Liu stat->dev == -1 && 747*87032833SAntonios Motakis stat->qid.type == 0xff && 748*87032833SAntonios Motakis stat->qid.version == (uint32_t) -1 && 749*87032833SAntonios Motakis stat->qid.path == (uint64_t) -1 && 75060ce86c7SWei Liu stat->mode == -1 && 75160ce86c7SWei Liu stat->atime == -1 && 75260ce86c7SWei Liu stat->mtime == -1 && 75360ce86c7SWei Liu stat->length == -1 && 75460ce86c7SWei Liu !stat->name.size && 75560ce86c7SWei Liu !stat->uid.size && 75660ce86c7SWei Liu !stat->gid.size && 75760ce86c7SWei Liu !stat->muid.size && 75860ce86c7SWei Liu stat->n_uid == -1 && 75960ce86c7SWei Liu stat->n_gid == -1 && 76060ce86c7SWei Liu stat->n_muid == -1) { 76160ce86c7SWei Liu return 1; 76260ce86c7SWei Liu } 76360ce86c7SWei Liu 76460ce86c7SWei Liu return 0; 76560ce86c7SWei Liu } 76660ce86c7SWei Liu 76760ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 76860ce86c7SWei Liu { 76960ce86c7SWei Liu v9fs_string_init(&stat->name); 77060ce86c7SWei Liu v9fs_string_init(&stat->uid); 77160ce86c7SWei Liu v9fs_string_init(&stat->gid); 77260ce86c7SWei Liu v9fs_string_init(&stat->muid); 77360ce86c7SWei Liu v9fs_string_init(&stat->extension); 77460ce86c7SWei Liu } 77560ce86c7SWei Liu 77660ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 77760ce86c7SWei Liu { 77860ce86c7SWei Liu v9fs_string_free(&stat->name); 77960ce86c7SWei Liu v9fs_string_free(&stat->uid); 78060ce86c7SWei Liu v9fs_string_free(&stat->gid); 78160ce86c7SWei Liu v9fs_string_free(&stat->muid); 78260ce86c7SWei Liu v9fs_string_free(&stat->extension); 78360ce86c7SWei Liu } 78460ce86c7SWei Liu 78560ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 78660ce86c7SWei Liu { 78760ce86c7SWei Liu uint32_t mode; 78860ce86c7SWei Liu 78960ce86c7SWei Liu mode = stbuf->st_mode & 0777; 79060ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 79160ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 79260ce86c7SWei Liu } 79360ce86c7SWei Liu 79460ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 79560ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 79660ce86c7SWei Liu } 79760ce86c7SWei Liu 79860ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 79960ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 80060ce86c7SWei Liu } 80160ce86c7SWei Liu 80260ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 80360ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 80460ce86c7SWei Liu } 80560ce86c7SWei Liu 80660ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 80760ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 80860ce86c7SWei Liu } 80960ce86c7SWei Liu 81060ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 81160ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 81260ce86c7SWei Liu } 81360ce86c7SWei Liu 81460ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 81560ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 81660ce86c7SWei Liu } 81760ce86c7SWei Liu 81860ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 81960ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 82060ce86c7SWei Liu } 82160ce86c7SWei Liu 82260ce86c7SWei Liu return mode; 82360ce86c7SWei Liu } 82460ce86c7SWei Liu 8256069537fSJan Dakinevich static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *path, 8266069537fSJan Dakinevich const char *basename, 82760ce86c7SWei Liu const struct stat *stbuf, 82860ce86c7SWei Liu V9fsStat *v9stat) 82960ce86c7SWei Liu { 83060ce86c7SWei Liu int err; 83160ce86c7SWei Liu 83260ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 83360ce86c7SWei Liu 83460ce86c7SWei Liu stat_to_qid(stbuf, &v9stat->qid); 83560ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 83660ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 83760ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 83860ce86c7SWei Liu v9stat->length = stbuf->st_size; 83960ce86c7SWei Liu 840abdf0086SGreg Kurz v9fs_string_free(&v9stat->uid); 841abdf0086SGreg Kurz v9fs_string_free(&v9stat->gid); 842abdf0086SGreg Kurz v9fs_string_free(&v9stat->muid); 84360ce86c7SWei Liu 84460ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 84560ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 84660ce86c7SWei Liu v9stat->n_muid = 0; 84760ce86c7SWei Liu 848abdf0086SGreg Kurz v9fs_string_free(&v9stat->extension); 84960ce86c7SWei Liu 85060ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 8516069537fSJan Dakinevich err = v9fs_co_readlink(pdu, path, &v9stat->extension); 85260ce86c7SWei Liu if (err < 0) { 85360ce86c7SWei Liu return err; 85460ce86c7SWei Liu } 85560ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 85660ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 85760ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 85860ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 85960ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 86060ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 86160ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 86260ce86c7SWei Liu } 86360ce86c7SWei Liu 8646069537fSJan Dakinevich v9fs_string_sprintf(&v9stat->name, "%s", basename); 86560ce86c7SWei Liu 86660ce86c7SWei Liu v9stat->size = 61 + 86760ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 86860ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 86960ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 87060ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 87160ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 87260ce86c7SWei Liu return 0; 87360ce86c7SWei Liu } 87460ce86c7SWei Liu 87560ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 87660ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 87760ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 87860ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 87960ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 88060ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 88160ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 88260ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 88360ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 88460ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 88560ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 88660ce86c7SWei Liu 88760ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 88860ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 88960ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 89060ce86c7SWei Liu 89160ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 89260ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 89360ce86c7SWei Liu 89460ce86c7SWei Liu 89560ce86c7SWei Liu static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, 89660ce86c7SWei Liu V9fsStatDotl *v9lstat) 89760ce86c7SWei Liu { 89860ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 89960ce86c7SWei Liu 90060ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 90160ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 90260ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 90360ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 90460ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 90560ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 90660ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 90760ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 90860ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 90960ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 91060ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 91160ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 91260ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 91360ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 91460ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 91560ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 91660ce86c7SWei Liu 91760ce86c7SWei Liu stat_to_qid(stbuf, &v9lstat->qid); 91860ce86c7SWei Liu } 91960ce86c7SWei Liu 92060ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 92160ce86c7SWei Liu { 92260ce86c7SWei Liu int i; 92360ce86c7SWei Liu 92460ce86c7SWei Liu printf("sg[%d]: {", cnt); 92560ce86c7SWei Liu for (i = 0; i < cnt; i++) { 92660ce86c7SWei Liu if (i) { 92760ce86c7SWei Liu printf(", "); 92860ce86c7SWei Liu } 92960ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 93060ce86c7SWei Liu } 93160ce86c7SWei Liu printf("}\n"); 93260ce86c7SWei Liu } 93360ce86c7SWei Liu 93460ce86c7SWei Liu /* Will call this only for path name based fid */ 93560ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 93660ce86c7SWei Liu { 93760ce86c7SWei Liu V9fsPath str; 93860ce86c7SWei Liu v9fs_path_init(&str); 93960ce86c7SWei Liu v9fs_path_copy(&str, dst); 940e3e83f2eSGreg Kurz v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); 94160ce86c7SWei Liu v9fs_path_free(&str); 94260ce86c7SWei Liu } 94360ce86c7SWei Liu 94460ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 94560ce86c7SWei Liu { 94660ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 94760ce86c7SWei Liu } 94860ce86c7SWei Liu 9498440e22eSGreg Kurz static void coroutine_fn v9fs_version(void *opaque) 95060ce86c7SWei Liu { 95160ce86c7SWei Liu ssize_t err; 95260ce86c7SWei Liu V9fsPDU *pdu = opaque; 95360ce86c7SWei Liu V9fsState *s = pdu->s; 95460ce86c7SWei Liu V9fsString version; 95560ce86c7SWei Liu size_t offset = 7; 95660ce86c7SWei Liu 95760ce86c7SWei Liu v9fs_string_init(&version); 95860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 95960ce86c7SWei Liu if (err < 0) { 96060ce86c7SWei Liu goto out; 96160ce86c7SWei Liu } 96260ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 96360ce86c7SWei Liu 96460ce86c7SWei Liu virtfs_reset(pdu); 96560ce86c7SWei Liu 96660ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 96760ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 96860ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 96960ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 97060ce86c7SWei Liu } else { 97160ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 97260ce86c7SWei Liu } 97360ce86c7SWei Liu 97460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 97560ce86c7SWei Liu if (err < 0) { 97660ce86c7SWei Liu goto out; 97760ce86c7SWei Liu } 978403a905bSPhilippe Mathieu-Daudé err += offset; 97960ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 98060ce86c7SWei Liu out: 981403a905bSPhilippe Mathieu-Daudé pdu_complete(pdu, err); 98260ce86c7SWei Liu v9fs_string_free(&version); 98360ce86c7SWei Liu } 98460ce86c7SWei Liu 9858440e22eSGreg Kurz static void coroutine_fn v9fs_attach(void *opaque) 98660ce86c7SWei Liu { 98760ce86c7SWei Liu V9fsPDU *pdu = opaque; 98860ce86c7SWei Liu V9fsState *s = pdu->s; 98960ce86c7SWei Liu int32_t fid, afid, n_uname; 99060ce86c7SWei Liu V9fsString uname, aname; 99160ce86c7SWei Liu V9fsFidState *fidp; 99260ce86c7SWei Liu size_t offset = 7; 99360ce86c7SWei Liu V9fsQID qid; 99460ce86c7SWei Liu ssize_t err; 995fe44dc91SAshijeet Acharya Error *local_err = NULL; 99660ce86c7SWei Liu 99760ce86c7SWei Liu v9fs_string_init(&uname); 99860ce86c7SWei Liu v9fs_string_init(&aname); 99960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 100060ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 100160ce86c7SWei Liu if (err < 0) { 100260ce86c7SWei Liu goto out_nofid; 100360ce86c7SWei Liu } 100460ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 100560ce86c7SWei Liu 100660ce86c7SWei Liu fidp = alloc_fid(s, fid); 100760ce86c7SWei Liu if (fidp == NULL) { 100860ce86c7SWei Liu err = -EINVAL; 100960ce86c7SWei Liu goto out_nofid; 101060ce86c7SWei Liu } 101160ce86c7SWei Liu fidp->uid = n_uname; 101260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 101360ce86c7SWei Liu if (err < 0) { 101460ce86c7SWei Liu err = -EINVAL; 101560ce86c7SWei Liu clunk_fid(s, fid); 101660ce86c7SWei Liu goto out; 101760ce86c7SWei Liu } 101860ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 101960ce86c7SWei Liu if (err < 0) { 102060ce86c7SWei Liu err = -EINVAL; 102160ce86c7SWei Liu clunk_fid(s, fid); 102260ce86c7SWei Liu goto out; 102360ce86c7SWei Liu } 1024fe44dc91SAshijeet Acharya 1025fe44dc91SAshijeet Acharya /* 1026fe44dc91SAshijeet Acharya * disable migration if we haven't done already. 1027fe44dc91SAshijeet Acharya * attach could get called multiple times for the same export. 1028fe44dc91SAshijeet Acharya */ 1029fe44dc91SAshijeet Acharya if (!s->migration_blocker) { 1030fe44dc91SAshijeet Acharya error_setg(&s->migration_blocker, 1031fe44dc91SAshijeet Acharya "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 1032fe44dc91SAshijeet Acharya s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 1033fe44dc91SAshijeet Acharya err = migrate_add_blocker(s->migration_blocker, &local_err); 1034fe44dc91SAshijeet Acharya if (local_err) { 1035fe44dc91SAshijeet Acharya error_free(local_err); 1036fe44dc91SAshijeet Acharya error_free(s->migration_blocker); 1037fe44dc91SAshijeet Acharya s->migration_blocker = NULL; 1038fe44dc91SAshijeet Acharya clunk_fid(s, fid); 1039fe44dc91SAshijeet Acharya goto out; 1040fe44dc91SAshijeet Acharya } 1041fe44dc91SAshijeet Acharya s->root_fid = fid; 1042fe44dc91SAshijeet Acharya } 1043fe44dc91SAshijeet Acharya 104460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 104560ce86c7SWei Liu if (err < 0) { 104660ce86c7SWei Liu clunk_fid(s, fid); 104760ce86c7SWei Liu goto out; 104860ce86c7SWei Liu } 104960ce86c7SWei Liu err += offset; 1050fe44dc91SAshijeet Acharya 105156f101ecSGreg Kurz memcpy(&s->root_qid, &qid, sizeof(qid)); 105260ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 105360ce86c7SWei Liu qid.type, qid.version, qid.path); 105460ce86c7SWei Liu out: 105560ce86c7SWei Liu put_fid(pdu, fidp); 105660ce86c7SWei Liu out_nofid: 105760ce86c7SWei Liu pdu_complete(pdu, err); 105860ce86c7SWei Liu v9fs_string_free(&uname); 105960ce86c7SWei Liu v9fs_string_free(&aname); 106060ce86c7SWei Liu } 106160ce86c7SWei Liu 10628440e22eSGreg Kurz static void coroutine_fn v9fs_stat(void *opaque) 106360ce86c7SWei Liu { 106460ce86c7SWei Liu int32_t fid; 106560ce86c7SWei Liu V9fsStat v9stat; 106660ce86c7SWei Liu ssize_t err = 0; 106760ce86c7SWei Liu size_t offset = 7; 106860ce86c7SWei Liu struct stat stbuf; 106960ce86c7SWei Liu V9fsFidState *fidp; 107060ce86c7SWei Liu V9fsPDU *pdu = opaque; 10716069537fSJan Dakinevich char *basename; 107260ce86c7SWei Liu 107360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 107460ce86c7SWei Liu if (err < 0) { 107560ce86c7SWei Liu goto out_nofid; 107660ce86c7SWei Liu } 107760ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 107860ce86c7SWei Liu 107960ce86c7SWei Liu fidp = get_fid(pdu, fid); 108060ce86c7SWei Liu if (fidp == NULL) { 108160ce86c7SWei Liu err = -ENOENT; 108260ce86c7SWei Liu goto out_nofid; 108360ce86c7SWei Liu } 108460ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 108560ce86c7SWei Liu if (err < 0) { 108660ce86c7SWei Liu goto out; 108760ce86c7SWei Liu } 10886069537fSJan Dakinevich basename = g_path_get_basename(fidp->path.data); 10896069537fSJan Dakinevich err = stat_to_v9stat(pdu, &fidp->path, basename, &stbuf, &v9stat); 10906069537fSJan Dakinevich g_free(basename); 109160ce86c7SWei Liu if (err < 0) { 109260ce86c7SWei Liu goto out; 109360ce86c7SWei Liu } 109460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 109560ce86c7SWei Liu if (err < 0) { 109660ce86c7SWei Liu v9fs_stat_free(&v9stat); 109760ce86c7SWei Liu goto out; 109860ce86c7SWei Liu } 109960ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 110060ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 110160ce86c7SWei Liu err += offset; 110260ce86c7SWei Liu v9fs_stat_free(&v9stat); 110360ce86c7SWei Liu out: 110460ce86c7SWei Liu put_fid(pdu, fidp); 110560ce86c7SWei Liu out_nofid: 110660ce86c7SWei Liu pdu_complete(pdu, err); 110760ce86c7SWei Liu } 110860ce86c7SWei Liu 11098440e22eSGreg Kurz static void coroutine_fn v9fs_getattr(void *opaque) 111060ce86c7SWei Liu { 111160ce86c7SWei Liu int32_t fid; 111260ce86c7SWei Liu size_t offset = 7; 111360ce86c7SWei Liu ssize_t retval = 0; 111460ce86c7SWei Liu struct stat stbuf; 111560ce86c7SWei Liu V9fsFidState *fidp; 111660ce86c7SWei Liu uint64_t request_mask; 111760ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 111860ce86c7SWei Liu V9fsPDU *pdu = opaque; 111960ce86c7SWei Liu V9fsState *s = pdu->s; 112060ce86c7SWei Liu 112160ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 112260ce86c7SWei Liu if (retval < 0) { 112360ce86c7SWei Liu goto out_nofid; 112460ce86c7SWei Liu } 112560ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 112660ce86c7SWei Liu 112760ce86c7SWei Liu fidp = get_fid(pdu, fid); 112860ce86c7SWei Liu if (fidp == NULL) { 112960ce86c7SWei Liu retval = -ENOENT; 113060ce86c7SWei Liu goto out_nofid; 113160ce86c7SWei Liu } 113260ce86c7SWei Liu /* 113360ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 113460ce86c7SWei Liu * need to look at request_mask. 113560ce86c7SWei Liu */ 113660ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 113760ce86c7SWei Liu if (retval < 0) { 113860ce86c7SWei Liu goto out; 113960ce86c7SWei Liu } 114060ce86c7SWei Liu stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); 114160ce86c7SWei Liu 114260ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 114360ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 114460ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 114560ce86c7SWei Liu switch (retval) { 114660ce86c7SWei Liu case 0: 114760ce86c7SWei Liu /* we have valid st_gen: update result mask */ 114860ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 114960ce86c7SWei Liu break; 115060ce86c7SWei Liu case -EINTR: 115160ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 115260ce86c7SWei Liu goto out; 115360ce86c7SWei Liu default: 115460ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 115560ce86c7SWei Liu break; 115660ce86c7SWei Liu } 115760ce86c7SWei Liu } 115860ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 115960ce86c7SWei Liu if (retval < 0) { 116060ce86c7SWei Liu goto out; 116160ce86c7SWei Liu } 116260ce86c7SWei Liu retval += offset; 116360ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 116460ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 116560ce86c7SWei Liu v9stat_dotl.st_gid); 116660ce86c7SWei Liu out: 116760ce86c7SWei Liu put_fid(pdu, fidp); 116860ce86c7SWei Liu out_nofid: 116960ce86c7SWei Liu pdu_complete(pdu, retval); 117060ce86c7SWei Liu } 117160ce86c7SWei Liu 117260ce86c7SWei Liu /* Attribute flags */ 117360ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 117460ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 117560ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 117660ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 117760ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 117860ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 117960ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 118060ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 118160ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 118260ce86c7SWei Liu 118360ce86c7SWei Liu #define P9_ATTR_MASK 127 118460ce86c7SWei Liu 11858440e22eSGreg Kurz static void coroutine_fn v9fs_setattr(void *opaque) 118660ce86c7SWei Liu { 118760ce86c7SWei Liu int err = 0; 118860ce86c7SWei Liu int32_t fid; 118960ce86c7SWei Liu V9fsFidState *fidp; 119060ce86c7SWei Liu size_t offset = 7; 119160ce86c7SWei Liu V9fsIattr v9iattr; 119260ce86c7SWei Liu V9fsPDU *pdu = opaque; 119360ce86c7SWei Liu 119460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 119560ce86c7SWei Liu if (err < 0) { 119660ce86c7SWei Liu goto out_nofid; 119760ce86c7SWei Liu } 119860ce86c7SWei Liu 11998f9c64bfSGreg Kurz trace_v9fs_setattr(pdu->tag, pdu->id, fid, 12008f9c64bfSGreg Kurz v9iattr.valid, v9iattr.mode, v9iattr.uid, v9iattr.gid, 12018f9c64bfSGreg Kurz v9iattr.size, v9iattr.atime_sec, v9iattr.mtime_sec); 12028f9c64bfSGreg Kurz 120360ce86c7SWei Liu fidp = get_fid(pdu, fid); 120460ce86c7SWei Liu if (fidp == NULL) { 120560ce86c7SWei Liu err = -EINVAL; 120660ce86c7SWei Liu goto out_nofid; 120760ce86c7SWei Liu } 120860ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 120960ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 121060ce86c7SWei Liu if (err < 0) { 121160ce86c7SWei Liu goto out; 121260ce86c7SWei Liu } 121360ce86c7SWei Liu } 121460ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 121560ce86c7SWei Liu struct timespec times[2]; 121660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 121760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 121860ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 121960ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 122060ce86c7SWei Liu } else { 122160ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 122260ce86c7SWei Liu } 122360ce86c7SWei Liu } else { 122460ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 122560ce86c7SWei Liu } 122660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 122760ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 122860ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 122960ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 123060ce86c7SWei Liu } else { 123160ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 123260ce86c7SWei Liu } 123360ce86c7SWei Liu } else { 123460ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 123560ce86c7SWei Liu } 123660ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 123760ce86c7SWei Liu if (err < 0) { 123860ce86c7SWei Liu goto out; 123960ce86c7SWei Liu } 124060ce86c7SWei Liu } 124160ce86c7SWei Liu /* 124260ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 124360ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 124460ce86c7SWei Liu */ 124560ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 124660ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 124760ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 124860ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 124960ce86c7SWei Liu v9iattr.uid = -1; 125060ce86c7SWei Liu } 125160ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 125260ce86c7SWei Liu v9iattr.gid = -1; 125360ce86c7SWei Liu } 125460ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 125560ce86c7SWei Liu v9iattr.gid); 125660ce86c7SWei Liu if (err < 0) { 125760ce86c7SWei Liu goto out; 125860ce86c7SWei Liu } 125960ce86c7SWei Liu } 126060ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 126160ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 126260ce86c7SWei Liu if (err < 0) { 126360ce86c7SWei Liu goto out; 126460ce86c7SWei Liu } 126560ce86c7SWei Liu } 126660ce86c7SWei Liu err = offset; 12678f9c64bfSGreg Kurz trace_v9fs_setattr_return(pdu->tag, pdu->id); 126860ce86c7SWei Liu out: 126960ce86c7SWei Liu put_fid(pdu, fidp); 127060ce86c7SWei Liu out_nofid: 127160ce86c7SWei Liu pdu_complete(pdu, err); 127260ce86c7SWei Liu } 127360ce86c7SWei Liu 127460ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 127560ce86c7SWei Liu { 127660ce86c7SWei Liu int i; 127760ce86c7SWei Liu ssize_t err; 127860ce86c7SWei Liu size_t offset = 7; 127960ce86c7SWei Liu 128060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 128160ce86c7SWei Liu if (err < 0) { 128260ce86c7SWei Liu return err; 128360ce86c7SWei Liu } 128460ce86c7SWei Liu offset += err; 128560ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 128660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 128760ce86c7SWei Liu if (err < 0) { 128860ce86c7SWei Liu return err; 128960ce86c7SWei Liu } 129060ce86c7SWei Liu offset += err; 129160ce86c7SWei Liu } 129260ce86c7SWei Liu return offset; 129360ce86c7SWei Liu } 129460ce86c7SWei Liu 1295fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1296fff39a7aSGreg Kurz { 1297fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1298fff39a7aSGreg Kurz } 1299fff39a7aSGreg Kurz 130056f101ecSGreg Kurz static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) 130156f101ecSGreg Kurz { 130256f101ecSGreg Kurz return 130356f101ecSGreg Kurz qid1->type != qid2->type || 130456f101ecSGreg Kurz qid1->version != qid2->version || 130556f101ecSGreg Kurz qid1->path != qid2->path; 130656f101ecSGreg Kurz } 130756f101ecSGreg Kurz 13088440e22eSGreg Kurz static void coroutine_fn v9fs_walk(void *opaque) 130960ce86c7SWei Liu { 131060ce86c7SWei Liu int name_idx; 131160ce86c7SWei Liu V9fsQID *qids = NULL; 131260ce86c7SWei Liu int i, err = 0; 131360ce86c7SWei Liu V9fsPath dpath, path; 131460ce86c7SWei Liu uint16_t nwnames; 131560ce86c7SWei Liu struct stat stbuf; 131660ce86c7SWei Liu size_t offset = 7; 131760ce86c7SWei Liu int32_t fid, newfid; 131860ce86c7SWei Liu V9fsString *wnames = NULL; 131960ce86c7SWei Liu V9fsFidState *fidp; 132060ce86c7SWei Liu V9fsFidState *newfidp = NULL; 132160ce86c7SWei Liu V9fsPDU *pdu = opaque; 132260ce86c7SWei Liu V9fsState *s = pdu->s; 132356f101ecSGreg Kurz V9fsQID qid; 132460ce86c7SWei Liu 132560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 132660ce86c7SWei Liu if (err < 0) { 132760ce86c7SWei Liu pdu_complete(pdu, err); 132860ce86c7SWei Liu return ; 132960ce86c7SWei Liu } 133060ce86c7SWei Liu offset += err; 133160ce86c7SWei Liu 133260ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 133360ce86c7SWei Liu 133460ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 13351923923bSGreg Kurz wnames = g_new0(V9fsString, nwnames); 13361923923bSGreg Kurz qids = g_new0(V9fsQID, nwnames); 133760ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 133860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 133960ce86c7SWei Liu if (err < 0) { 134060ce86c7SWei Liu goto out_nofid; 134160ce86c7SWei Liu } 1342fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1343fff39a7aSGreg Kurz err = -ENOENT; 1344fff39a7aSGreg Kurz goto out_nofid; 1345fff39a7aSGreg Kurz } 134660ce86c7SWei Liu offset += err; 134760ce86c7SWei Liu } 134860ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 134960ce86c7SWei Liu err = -EINVAL; 135060ce86c7SWei Liu goto out_nofid; 135160ce86c7SWei Liu } 135260ce86c7SWei Liu fidp = get_fid(pdu, fid); 135360ce86c7SWei Liu if (fidp == NULL) { 135460ce86c7SWei Liu err = -ENOENT; 135560ce86c7SWei Liu goto out_nofid; 135660ce86c7SWei Liu } 135756f101ecSGreg Kurz 135813fd08e6SGreg Kurz v9fs_path_init(&dpath); 135913fd08e6SGreg Kurz v9fs_path_init(&path); 136013fd08e6SGreg Kurz 136156f101ecSGreg Kurz err = fid_to_qid(pdu, fidp, &qid); 136256f101ecSGreg Kurz if (err < 0) { 136356f101ecSGreg Kurz goto out; 136456f101ecSGreg Kurz } 136556f101ecSGreg Kurz 136660ce86c7SWei Liu /* 136760ce86c7SWei Liu * Both dpath and path initially poin to fidp. 136860ce86c7SWei Liu * Needed to handle request with nwnames == 0 136960ce86c7SWei Liu */ 137060ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 137160ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 137260ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 137356f101ecSGreg Kurz if (not_same_qid(&pdu->s->root_qid, &qid) || 137456f101ecSGreg Kurz strcmp("..", wnames[name_idx].data)) { 137556f101ecSGreg Kurz err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, 137656f101ecSGreg Kurz &path); 137760ce86c7SWei Liu if (err < 0) { 137860ce86c7SWei Liu goto out; 137960ce86c7SWei Liu } 138056f101ecSGreg Kurz 138160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 138260ce86c7SWei Liu if (err < 0) { 138360ce86c7SWei Liu goto out; 138460ce86c7SWei Liu } 138556f101ecSGreg Kurz stat_to_qid(&stbuf, &qid); 138660ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 138760ce86c7SWei Liu } 138856f101ecSGreg Kurz memcpy(&qids[name_idx], &qid, sizeof(qid)); 138956f101ecSGreg Kurz } 139060ce86c7SWei Liu if (fid == newfid) { 139149dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 139249dd946bSGreg Kurz err = -EINVAL; 139349dd946bSGreg Kurz goto out; 139449dd946bSGreg Kurz } 13955b3c77aaSGreg Kurz v9fs_path_write_lock(s); 139660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 13975b3c77aaSGreg Kurz v9fs_path_unlock(s); 139860ce86c7SWei Liu } else { 139960ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 140060ce86c7SWei Liu if (newfidp == NULL) { 140160ce86c7SWei Liu err = -EINVAL; 140260ce86c7SWei Liu goto out; 140360ce86c7SWei Liu } 140460ce86c7SWei Liu newfidp->uid = fidp->uid; 140560ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 140660ce86c7SWei Liu } 140760ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 140860ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 140960ce86c7SWei Liu out: 141060ce86c7SWei Liu put_fid(pdu, fidp); 141160ce86c7SWei Liu if (newfidp) { 141260ce86c7SWei Liu put_fid(pdu, newfidp); 141360ce86c7SWei Liu } 141460ce86c7SWei Liu v9fs_path_free(&dpath); 141560ce86c7SWei Liu v9fs_path_free(&path); 141660ce86c7SWei Liu out_nofid: 141760ce86c7SWei Liu pdu_complete(pdu, err); 141860ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 141960ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 142060ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 142160ce86c7SWei Liu } 142260ce86c7SWei Liu g_free(wnames); 142360ce86c7SWei Liu g_free(qids); 142460ce86c7SWei Liu } 142560ce86c7SWei Liu } 142660ce86c7SWei Liu 14278440e22eSGreg Kurz static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) 142860ce86c7SWei Liu { 142960ce86c7SWei Liu struct statfs stbuf; 143060ce86c7SWei Liu int32_t iounit = 0; 143160ce86c7SWei Liu V9fsState *s = pdu->s; 143260ce86c7SWei Liu 143360ce86c7SWei Liu /* 143460ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 143560ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 143660ce86c7SWei Liu */ 143760ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 143860ce86c7SWei Liu iounit = stbuf.f_bsize; 143960ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 144060ce86c7SWei Liu } 144160ce86c7SWei Liu if (!iounit) { 144260ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 144360ce86c7SWei Liu } 144460ce86c7SWei Liu return iounit; 144560ce86c7SWei Liu } 144660ce86c7SWei Liu 14478440e22eSGreg Kurz static void coroutine_fn v9fs_open(void *opaque) 144860ce86c7SWei Liu { 144960ce86c7SWei Liu int flags; 145060ce86c7SWei Liu int32_t fid; 145160ce86c7SWei Liu int32_t mode; 145260ce86c7SWei Liu V9fsQID qid; 145360ce86c7SWei Liu int iounit = 0; 145460ce86c7SWei Liu ssize_t err = 0; 145560ce86c7SWei Liu size_t offset = 7; 145660ce86c7SWei Liu struct stat stbuf; 145760ce86c7SWei Liu V9fsFidState *fidp; 145860ce86c7SWei Liu V9fsPDU *pdu = opaque; 145960ce86c7SWei Liu V9fsState *s = pdu->s; 146060ce86c7SWei Liu 146160ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 146260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 146360ce86c7SWei Liu } else { 146460ce86c7SWei Liu uint8_t modebyte; 146560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 146660ce86c7SWei Liu mode = modebyte; 146760ce86c7SWei Liu } 146860ce86c7SWei Liu if (err < 0) { 146960ce86c7SWei Liu goto out_nofid; 147060ce86c7SWei Liu } 147160ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 147260ce86c7SWei Liu 147360ce86c7SWei Liu fidp = get_fid(pdu, fid); 147460ce86c7SWei Liu if (fidp == NULL) { 147560ce86c7SWei Liu err = -ENOENT; 147660ce86c7SWei Liu goto out_nofid; 147760ce86c7SWei Liu } 147849dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 147949dd946bSGreg Kurz err = -EINVAL; 148049dd946bSGreg Kurz goto out; 148149dd946bSGreg Kurz } 148260ce86c7SWei Liu 148360ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 148460ce86c7SWei Liu if (err < 0) { 148560ce86c7SWei Liu goto out; 148660ce86c7SWei Liu } 148760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 148860ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 148960ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 149060ce86c7SWei Liu if (err < 0) { 149160ce86c7SWei Liu goto out; 149260ce86c7SWei Liu } 149360ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 149460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 149560ce86c7SWei Liu if (err < 0) { 149660ce86c7SWei Liu goto out; 149760ce86c7SWei Liu } 149860ce86c7SWei Liu err += offset; 149960ce86c7SWei Liu } else { 150060ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 150160ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 150260ce86c7SWei Liu } else { 150360ce86c7SWei Liu flags = omode_to_uflags(mode); 150460ce86c7SWei Liu } 150560ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 150660ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 150760ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 150860ce86c7SWei Liu err = -EROFS; 150960ce86c7SWei Liu goto out; 151060ce86c7SWei Liu } 151160ce86c7SWei Liu } 151260ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 151360ce86c7SWei Liu if (err < 0) { 151460ce86c7SWei Liu goto out; 151560ce86c7SWei Liu } 151660ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 151760ce86c7SWei Liu fidp->open_flags = flags; 151860ce86c7SWei Liu if (flags & O_EXCL) { 151960ce86c7SWei Liu /* 152060ce86c7SWei Liu * We let the host file system do O_EXCL check 152160ce86c7SWei Liu * We should not reclaim such fd 152260ce86c7SWei Liu */ 152360ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 152460ce86c7SWei Liu } 152560ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 152660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 152760ce86c7SWei Liu if (err < 0) { 152860ce86c7SWei Liu goto out; 152960ce86c7SWei Liu } 153060ce86c7SWei Liu err += offset; 153160ce86c7SWei Liu } 153260ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 153360ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 153460ce86c7SWei Liu out: 153560ce86c7SWei Liu put_fid(pdu, fidp); 153660ce86c7SWei Liu out_nofid: 153760ce86c7SWei Liu pdu_complete(pdu, err); 153860ce86c7SWei Liu } 153960ce86c7SWei Liu 15408440e22eSGreg Kurz static void coroutine_fn v9fs_lcreate(void *opaque) 154160ce86c7SWei Liu { 154260ce86c7SWei Liu int32_t dfid, flags, mode; 154360ce86c7SWei Liu gid_t gid; 154460ce86c7SWei Liu ssize_t err = 0; 154560ce86c7SWei Liu ssize_t offset = 7; 154660ce86c7SWei Liu V9fsString name; 154760ce86c7SWei Liu V9fsFidState *fidp; 154860ce86c7SWei Liu struct stat stbuf; 154960ce86c7SWei Liu V9fsQID qid; 155060ce86c7SWei Liu int32_t iounit; 155160ce86c7SWei Liu V9fsPDU *pdu = opaque; 155260ce86c7SWei Liu 155360ce86c7SWei Liu v9fs_string_init(&name); 155460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 155560ce86c7SWei Liu &name, &flags, &mode, &gid); 155660ce86c7SWei Liu if (err < 0) { 155760ce86c7SWei Liu goto out_nofid; 155860ce86c7SWei Liu } 155960ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 156060ce86c7SWei Liu 1561fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1562fff39a7aSGreg Kurz err = -ENOENT; 1563fff39a7aSGreg Kurz goto out_nofid; 1564fff39a7aSGreg Kurz } 1565fff39a7aSGreg Kurz 1566805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1567805b5d98SGreg Kurz err = -EEXIST; 1568805b5d98SGreg Kurz goto out_nofid; 1569805b5d98SGreg Kurz } 1570805b5d98SGreg Kurz 157160ce86c7SWei Liu fidp = get_fid(pdu, dfid); 157260ce86c7SWei Liu if (fidp == NULL) { 157360ce86c7SWei Liu err = -ENOENT; 157460ce86c7SWei Liu goto out_nofid; 157560ce86c7SWei Liu } 1576d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 1577d63fb193SLi Qiang err = -EINVAL; 1578d63fb193SLi Qiang goto out; 1579d63fb193SLi Qiang } 158060ce86c7SWei Liu 158160ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 158260ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 158360ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 158460ce86c7SWei Liu if (err < 0) { 158560ce86c7SWei Liu goto out; 158660ce86c7SWei Liu } 158760ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 158860ce86c7SWei Liu fidp->open_flags = flags; 158960ce86c7SWei Liu if (flags & O_EXCL) { 159060ce86c7SWei Liu /* 159160ce86c7SWei Liu * We let the host file system do O_EXCL check 159260ce86c7SWei Liu * We should not reclaim such fd 159360ce86c7SWei Liu */ 159460ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 159560ce86c7SWei Liu } 159660ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 159760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 159860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 159960ce86c7SWei Liu if (err < 0) { 160060ce86c7SWei Liu goto out; 160160ce86c7SWei Liu } 160260ce86c7SWei Liu err += offset; 160360ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 160460ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 160560ce86c7SWei Liu out: 160660ce86c7SWei Liu put_fid(pdu, fidp); 160760ce86c7SWei Liu out_nofid: 160860ce86c7SWei Liu pdu_complete(pdu, err); 160960ce86c7SWei Liu v9fs_string_free(&name); 161060ce86c7SWei Liu } 161160ce86c7SWei Liu 1612a1bf8b74SGreg Kurz static void coroutine_fn v9fs_fsync(void *opaque) 161360ce86c7SWei Liu { 161460ce86c7SWei Liu int err; 161560ce86c7SWei Liu int32_t fid; 161660ce86c7SWei Liu int datasync; 161760ce86c7SWei Liu size_t offset = 7; 161860ce86c7SWei Liu V9fsFidState *fidp; 161960ce86c7SWei Liu V9fsPDU *pdu = opaque; 162060ce86c7SWei Liu 162160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 162260ce86c7SWei Liu if (err < 0) { 162360ce86c7SWei Liu goto out_nofid; 162460ce86c7SWei Liu } 162560ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 162660ce86c7SWei Liu 162760ce86c7SWei Liu fidp = get_fid(pdu, fid); 162860ce86c7SWei Liu if (fidp == NULL) { 162960ce86c7SWei Liu err = -ENOENT; 163060ce86c7SWei Liu goto out_nofid; 163160ce86c7SWei Liu } 163260ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 163360ce86c7SWei Liu if (!err) { 163460ce86c7SWei Liu err = offset; 163560ce86c7SWei Liu } 163660ce86c7SWei Liu put_fid(pdu, fidp); 163760ce86c7SWei Liu out_nofid: 163860ce86c7SWei Liu pdu_complete(pdu, err); 163960ce86c7SWei Liu } 164060ce86c7SWei Liu 16418440e22eSGreg Kurz static void coroutine_fn v9fs_clunk(void *opaque) 164260ce86c7SWei Liu { 164360ce86c7SWei Liu int err; 164460ce86c7SWei Liu int32_t fid; 164560ce86c7SWei Liu size_t offset = 7; 164660ce86c7SWei Liu V9fsFidState *fidp; 164760ce86c7SWei Liu V9fsPDU *pdu = opaque; 164860ce86c7SWei Liu V9fsState *s = pdu->s; 164960ce86c7SWei Liu 165060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 165160ce86c7SWei Liu if (err < 0) { 165260ce86c7SWei Liu goto out_nofid; 165360ce86c7SWei Liu } 165460ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 165560ce86c7SWei Liu 165660ce86c7SWei Liu fidp = clunk_fid(s, fid); 165760ce86c7SWei Liu if (fidp == NULL) { 165860ce86c7SWei Liu err = -ENOENT; 165960ce86c7SWei Liu goto out_nofid; 166060ce86c7SWei Liu } 166160ce86c7SWei Liu /* 166260ce86c7SWei Liu * Bump the ref so that put_fid will 166360ce86c7SWei Liu * free the fid. 166460ce86c7SWei Liu */ 166560ce86c7SWei Liu fidp->ref++; 166660ce86c7SWei Liu err = put_fid(pdu, fidp); 166760ce86c7SWei Liu if (!err) { 166860ce86c7SWei Liu err = offset; 166960ce86c7SWei Liu } 167060ce86c7SWei Liu out_nofid: 167160ce86c7SWei Liu pdu_complete(pdu, err); 167260ce86c7SWei Liu } 167360ce86c7SWei Liu 1674bcb8998fSStefano Stabellini /* 1675bcb8998fSStefano Stabellini * Create a QEMUIOVector for a sub-region of PDU iovecs 1676bcb8998fSStefano Stabellini * 1677bcb8998fSStefano Stabellini * @qiov: uninitialized QEMUIOVector 1678bcb8998fSStefano Stabellini * @skip: number of bytes to skip from beginning of PDU 1679bcb8998fSStefano Stabellini * @size: number of bytes to include 1680bcb8998fSStefano Stabellini * @is_write: true - write, false - read 1681bcb8998fSStefano Stabellini * 1682bcb8998fSStefano Stabellini * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 1683bcb8998fSStefano Stabellini * with qemu_iovec_destroy(). 1684bcb8998fSStefano Stabellini */ 1685bcb8998fSStefano Stabellini static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 1686bcb8998fSStefano Stabellini size_t skip, size_t size, 1687bcb8998fSStefano Stabellini bool is_write) 1688bcb8998fSStefano Stabellini { 1689bcb8998fSStefano Stabellini QEMUIOVector elem; 1690bcb8998fSStefano Stabellini struct iovec *iov; 1691bcb8998fSStefano Stabellini unsigned int niov; 1692bcb8998fSStefano Stabellini 169388da0b03SStefano Stabellini if (is_write) { 16948d37de41SGreg Kurz pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov, size + skip); 169588da0b03SStefano Stabellini } else { 1696fa0eb5c5SGreg Kurz pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); 169788da0b03SStefano Stabellini } 1698bcb8998fSStefano Stabellini 1699bcb8998fSStefano Stabellini qemu_iovec_init_external(&elem, iov, niov); 1700bcb8998fSStefano Stabellini qemu_iovec_init(qiov, niov); 1701bcb8998fSStefano Stabellini qemu_iovec_concat(qiov, &elem, skip, size); 1702bcb8998fSStefano Stabellini } 1703bcb8998fSStefano Stabellini 170460ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 170560ce86c7SWei Liu uint64_t off, uint32_t max_count) 170660ce86c7SWei Liu { 170760ce86c7SWei Liu ssize_t err; 170860ce86c7SWei Liu size_t offset = 7; 17097e55d65cSLi Qiang uint64_t read_count; 1710bcb8998fSStefano Stabellini QEMUIOVector qiov_full; 171160ce86c7SWei Liu 17127e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 17137e55d65cSLi Qiang read_count = 0; 17147e55d65cSLi Qiang } else { 17157e55d65cSLi Qiang read_count = fidp->fs.xattr.len - off; 17167e55d65cSLi Qiang } 171760ce86c7SWei Liu if (read_count > max_count) { 171860ce86c7SWei Liu read_count = max_count; 171960ce86c7SWei Liu } 172060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 172160ce86c7SWei Liu if (err < 0) { 172260ce86c7SWei Liu return err; 172360ce86c7SWei Liu } 172460ce86c7SWei Liu offset += err; 172500588a0aSWei Liu 1726fa0eb5c5SGreg Kurz v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); 1727fa0eb5c5SGreg Kurz err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, 172860ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 172960ce86c7SWei Liu read_count); 1730bcb8998fSStefano Stabellini qemu_iovec_destroy(&qiov_full); 173160ce86c7SWei Liu if (err < 0) { 173260ce86c7SWei Liu return err; 173360ce86c7SWei Liu } 173460ce86c7SWei Liu offset += err; 173560ce86c7SWei Liu return offset; 173660ce86c7SWei Liu } 173760ce86c7SWei Liu 17388440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, 17398440e22eSGreg Kurz V9fsFidState *fidp, 17408440e22eSGreg Kurz uint32_t max_count) 174160ce86c7SWei Liu { 174260ce86c7SWei Liu V9fsPath path; 174360ce86c7SWei Liu V9fsStat v9stat; 174460ce86c7SWei Liu int len, err = 0; 174560ce86c7SWei Liu int32_t count = 0; 174660ce86c7SWei Liu struct stat stbuf; 174760ce86c7SWei Liu off_t saved_dir_pos; 1748635324e8SGreg Kurz struct dirent *dent; 174960ce86c7SWei Liu 175060ce86c7SWei Liu /* save the directory position */ 175160ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 175260ce86c7SWei Liu if (saved_dir_pos < 0) { 175360ce86c7SWei Liu return saved_dir_pos; 175460ce86c7SWei Liu } 175560ce86c7SWei Liu 175660ce86c7SWei Liu while (1) { 175760ce86c7SWei Liu v9fs_path_init(&path); 17587cde47d4SGreg Kurz 17597cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 17607cde47d4SGreg Kurz 1761635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1762635324e8SGreg Kurz if (err || !dent) { 176360ce86c7SWei Liu break; 176460ce86c7SWei Liu } 176560ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 176660ce86c7SWei Liu if (err < 0) { 17678762a46dSGreg Kurz break; 176860ce86c7SWei Liu } 176960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 177060ce86c7SWei Liu if (err < 0) { 17718762a46dSGreg Kurz break; 177260ce86c7SWei Liu } 17736069537fSJan Dakinevich err = stat_to_v9stat(pdu, &path, dent->d_name, &stbuf, &v9stat); 177460ce86c7SWei Liu if (err < 0) { 17758762a46dSGreg Kurz break; 177660ce86c7SWei Liu } 1777772a7369SJan Dakinevich if ((count + v9stat.size + 2) > max_count) { 17787cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 17797cde47d4SGreg Kurz 178060ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 178160ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 178260ce86c7SWei Liu v9fs_stat_free(&v9stat); 178360ce86c7SWei Liu v9fs_path_free(&path); 178460ce86c7SWei Liu return count; 178560ce86c7SWei Liu } 1786772a7369SJan Dakinevich 1787772a7369SJan Dakinevich /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 1788772a7369SJan Dakinevich len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 1789772a7369SJan Dakinevich 1790772a7369SJan Dakinevich v9fs_readdir_unlock(&fidp->fs.dir); 1791772a7369SJan Dakinevich 1792772a7369SJan Dakinevich if (len < 0) { 1793772a7369SJan Dakinevich v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 1794772a7369SJan Dakinevich v9fs_stat_free(&v9stat); 1795772a7369SJan Dakinevich v9fs_path_free(&path); 1796772a7369SJan Dakinevich return len; 1797772a7369SJan Dakinevich } 179860ce86c7SWei Liu count += len; 179960ce86c7SWei Liu v9fs_stat_free(&v9stat); 180060ce86c7SWei Liu v9fs_path_free(&path); 180160ce86c7SWei Liu saved_dir_pos = dent->d_off; 180260ce86c7SWei Liu } 18038762a46dSGreg Kurz 18047cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18057cde47d4SGreg Kurz 180660ce86c7SWei Liu v9fs_path_free(&path); 180760ce86c7SWei Liu if (err < 0) { 180860ce86c7SWei Liu return err; 180960ce86c7SWei Liu } 181060ce86c7SWei Liu return count; 181160ce86c7SWei Liu } 181260ce86c7SWei Liu 18138440e22eSGreg Kurz static void coroutine_fn v9fs_read(void *opaque) 181460ce86c7SWei Liu { 181560ce86c7SWei Liu int32_t fid; 181660ce86c7SWei Liu uint64_t off; 181760ce86c7SWei Liu ssize_t err = 0; 181860ce86c7SWei Liu int32_t count = 0; 181960ce86c7SWei Liu size_t offset = 7; 182060ce86c7SWei Liu uint32_t max_count; 182160ce86c7SWei Liu V9fsFidState *fidp; 182260ce86c7SWei Liu V9fsPDU *pdu = opaque; 182360ce86c7SWei Liu V9fsState *s = pdu->s; 182460ce86c7SWei Liu 182560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 182660ce86c7SWei Liu if (err < 0) { 182760ce86c7SWei Liu goto out_nofid; 182860ce86c7SWei Liu } 182960ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 183060ce86c7SWei Liu 183160ce86c7SWei Liu fidp = get_fid(pdu, fid); 183260ce86c7SWei Liu if (fidp == NULL) { 183360ce86c7SWei Liu err = -EINVAL; 183460ce86c7SWei Liu goto out_nofid; 183560ce86c7SWei Liu } 183660ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 183760ce86c7SWei Liu 183860ce86c7SWei Liu if (off == 0) { 183960ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 184060ce86c7SWei Liu } 184160ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 184260ce86c7SWei Liu if (count < 0) { 184360ce86c7SWei Liu err = count; 184460ce86c7SWei Liu goto out; 184560ce86c7SWei Liu } 184660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 184760ce86c7SWei Liu if (err < 0) { 184860ce86c7SWei Liu goto out; 184960ce86c7SWei Liu } 185060ce86c7SWei Liu err += offset + count; 185160ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 185260ce86c7SWei Liu QEMUIOVector qiov_full; 185360ce86c7SWei Liu QEMUIOVector qiov; 185460ce86c7SWei Liu int32_t len; 185560ce86c7SWei Liu 185660ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 185760ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 185860ce86c7SWei Liu do { 185960ce86c7SWei Liu qemu_iovec_reset(&qiov); 186060ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 186160ce86c7SWei Liu if (0) { 186260ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 186360ce86c7SWei Liu } 186460ce86c7SWei Liu /* Loop in case of EINTR */ 186560ce86c7SWei Liu do { 186660ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 186760ce86c7SWei Liu if (len >= 0) { 186860ce86c7SWei Liu off += len; 186960ce86c7SWei Liu count += len; 187060ce86c7SWei Liu } 187160ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 187260ce86c7SWei Liu if (len < 0) { 187360ce86c7SWei Liu /* IO error return the error */ 187460ce86c7SWei Liu err = len; 1875e95c9a49SLi Qiang goto out_free_iovec; 187660ce86c7SWei Liu } 187760ce86c7SWei Liu } while (count < max_count && len > 0); 187860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 187960ce86c7SWei Liu if (err < 0) { 1880e95c9a49SLi Qiang goto out_free_iovec; 188160ce86c7SWei Liu } 188260ce86c7SWei Liu err += offset + count; 1883e95c9a49SLi Qiang out_free_iovec: 188460ce86c7SWei Liu qemu_iovec_destroy(&qiov); 188560ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 188660ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 188760ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 188860ce86c7SWei Liu } else { 188960ce86c7SWei Liu err = -EINVAL; 189060ce86c7SWei Liu } 189160ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 189260ce86c7SWei Liu out: 189360ce86c7SWei Liu put_fid(pdu, fidp); 189460ce86c7SWei Liu out_nofid: 189560ce86c7SWei Liu pdu_complete(pdu, err); 189660ce86c7SWei Liu } 189760ce86c7SWei Liu 189860ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 189960ce86c7SWei Liu { 190060ce86c7SWei Liu /* 190160ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 190260ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 190360ce86c7SWei Liu */ 190460ce86c7SWei Liu return 24 + v9fs_string_size(name); 190560ce86c7SWei Liu } 190660ce86c7SWei Liu 19078440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, 19088440e22eSGreg Kurz int32_t max_count) 190960ce86c7SWei Liu { 191060ce86c7SWei Liu size_t size; 191160ce86c7SWei Liu V9fsQID qid; 191260ce86c7SWei Liu V9fsString name; 191360ce86c7SWei Liu int len, err = 0; 191460ce86c7SWei Liu int32_t count = 0; 191560ce86c7SWei Liu off_t saved_dir_pos; 1916635324e8SGreg Kurz struct dirent *dent; 191760ce86c7SWei Liu 191860ce86c7SWei Liu /* save the directory position */ 191960ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 192060ce86c7SWei Liu if (saved_dir_pos < 0) { 192160ce86c7SWei Liu return saved_dir_pos; 192260ce86c7SWei Liu } 192360ce86c7SWei Liu 192460ce86c7SWei Liu while (1) { 19257cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 19267cde47d4SGreg Kurz 1927635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1928635324e8SGreg Kurz if (err || !dent) { 192960ce86c7SWei Liu break; 193060ce86c7SWei Liu } 193160ce86c7SWei Liu v9fs_string_init(&name); 193260ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 193360ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 19347cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19357cde47d4SGreg Kurz 193660ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 193760ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 193860ce86c7SWei Liu v9fs_string_free(&name); 193960ce86c7SWei Liu return count; 194060ce86c7SWei Liu } 194160ce86c7SWei Liu /* 194260ce86c7SWei Liu * Fill up just the path field of qid because the client uses 194360ce86c7SWei Liu * only that. To fill the entire qid structure we will have 194460ce86c7SWei Liu * to stat each dirent found, which is expensive 194560ce86c7SWei Liu */ 194660ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 194760ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 194860ce86c7SWei Liu /* Fill the other fields with dummy values */ 194960ce86c7SWei Liu qid.type = 0; 195060ce86c7SWei Liu qid.version = 0; 195160ce86c7SWei Liu 195260ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 195360ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 195460ce86c7SWei Liu &qid, dent->d_off, 195560ce86c7SWei Liu dent->d_type, &name); 19567cde47d4SGreg Kurz 19577cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19587cde47d4SGreg Kurz 195960ce86c7SWei Liu if (len < 0) { 196060ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 196160ce86c7SWei Liu v9fs_string_free(&name); 196260ce86c7SWei Liu return len; 196360ce86c7SWei Liu } 196460ce86c7SWei Liu count += len; 196560ce86c7SWei Liu v9fs_string_free(&name); 196660ce86c7SWei Liu saved_dir_pos = dent->d_off; 196760ce86c7SWei Liu } 19687cde47d4SGreg Kurz 19697cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19707cde47d4SGreg Kurz 197160ce86c7SWei Liu if (err < 0) { 197260ce86c7SWei Liu return err; 197360ce86c7SWei Liu } 197460ce86c7SWei Liu return count; 197560ce86c7SWei Liu } 197660ce86c7SWei Liu 19778440e22eSGreg Kurz static void coroutine_fn v9fs_readdir(void *opaque) 197860ce86c7SWei Liu { 197960ce86c7SWei Liu int32_t fid; 198060ce86c7SWei Liu V9fsFidState *fidp; 198160ce86c7SWei Liu ssize_t retval = 0; 198260ce86c7SWei Liu size_t offset = 7; 198360ce86c7SWei Liu uint64_t initial_offset; 198460ce86c7SWei Liu int32_t count; 198560ce86c7SWei Liu uint32_t max_count; 198660ce86c7SWei Liu V9fsPDU *pdu = opaque; 198760ce86c7SWei Liu 198860ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 198960ce86c7SWei Liu &initial_offset, &max_count); 199060ce86c7SWei Liu if (retval < 0) { 199160ce86c7SWei Liu goto out_nofid; 199260ce86c7SWei Liu } 199360ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 199460ce86c7SWei Liu 199560ce86c7SWei Liu fidp = get_fid(pdu, fid); 199660ce86c7SWei Liu if (fidp == NULL) { 199760ce86c7SWei Liu retval = -EINVAL; 199860ce86c7SWei Liu goto out_nofid; 199960ce86c7SWei Liu } 2000f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 200160ce86c7SWei Liu retval = -EINVAL; 200260ce86c7SWei Liu goto out; 200360ce86c7SWei Liu } 200460ce86c7SWei Liu if (initial_offset == 0) { 200560ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 200660ce86c7SWei Liu } else { 200760ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 200860ce86c7SWei Liu } 200960ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 201060ce86c7SWei Liu if (count < 0) { 201160ce86c7SWei Liu retval = count; 201260ce86c7SWei Liu goto out; 201360ce86c7SWei Liu } 201460ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 201560ce86c7SWei Liu if (retval < 0) { 201660ce86c7SWei Liu goto out; 201760ce86c7SWei Liu } 201860ce86c7SWei Liu retval += count + offset; 201960ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 202060ce86c7SWei Liu out: 202160ce86c7SWei Liu put_fid(pdu, fidp); 202260ce86c7SWei Liu out_nofid: 202360ce86c7SWei Liu pdu_complete(pdu, retval); 202460ce86c7SWei Liu } 202560ce86c7SWei Liu 202660ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 202760ce86c7SWei Liu uint64_t off, uint32_t count, 202860ce86c7SWei Liu struct iovec *sg, int cnt) 202960ce86c7SWei Liu { 203060ce86c7SWei Liu int i, to_copy; 203160ce86c7SWei Liu ssize_t err = 0; 20327e55d65cSLi Qiang uint64_t write_count; 203360ce86c7SWei Liu size_t offset = 7; 203460ce86c7SWei Liu 203560ce86c7SWei Liu 20367e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 203760ce86c7SWei Liu err = -ENOSPC; 203860ce86c7SWei Liu goto out; 203960ce86c7SWei Liu } 20407e55d65cSLi Qiang write_count = fidp->fs.xattr.len - off; 20417e55d65cSLi Qiang if (write_count > count) { 20427e55d65cSLi Qiang write_count = count; 20437e55d65cSLi Qiang } 204460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 204560ce86c7SWei Liu if (err < 0) { 204660ce86c7SWei Liu return err; 204760ce86c7SWei Liu } 204860ce86c7SWei Liu err += offset; 204960ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 205060ce86c7SWei Liu /* 205160ce86c7SWei Liu * Now copy the content from sg list 205260ce86c7SWei Liu */ 205360ce86c7SWei Liu for (i = 0; i < cnt; i++) { 205460ce86c7SWei Liu if (write_count > sg[i].iov_len) { 205560ce86c7SWei Liu to_copy = sg[i].iov_len; 205660ce86c7SWei Liu } else { 205760ce86c7SWei Liu to_copy = write_count; 205860ce86c7SWei Liu } 205960ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 206060ce86c7SWei Liu /* updating vs->off since we are not using below */ 206160ce86c7SWei Liu off += to_copy; 206260ce86c7SWei Liu write_count -= to_copy; 206360ce86c7SWei Liu } 206460ce86c7SWei Liu out: 206560ce86c7SWei Liu return err; 206660ce86c7SWei Liu } 206760ce86c7SWei Liu 20688440e22eSGreg Kurz static void coroutine_fn v9fs_write(void *opaque) 206960ce86c7SWei Liu { 207060ce86c7SWei Liu ssize_t err; 207160ce86c7SWei Liu int32_t fid; 207260ce86c7SWei Liu uint64_t off; 207360ce86c7SWei Liu uint32_t count; 207460ce86c7SWei Liu int32_t len = 0; 207560ce86c7SWei Liu int32_t total = 0; 207660ce86c7SWei Liu size_t offset = 7; 207760ce86c7SWei Liu V9fsFidState *fidp; 207860ce86c7SWei Liu V9fsPDU *pdu = opaque; 207960ce86c7SWei Liu V9fsState *s = pdu->s; 208060ce86c7SWei Liu QEMUIOVector qiov_full; 208160ce86c7SWei Liu QEMUIOVector qiov; 208260ce86c7SWei Liu 208360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 208460ce86c7SWei Liu if (err < 0) { 208560ce86c7SWei Liu pdu_complete(pdu, err); 208660ce86c7SWei Liu return; 208760ce86c7SWei Liu } 208860ce86c7SWei Liu offset += err; 208960ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 209060ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 209160ce86c7SWei Liu 209260ce86c7SWei Liu fidp = get_fid(pdu, fid); 209360ce86c7SWei Liu if (fidp == NULL) { 209460ce86c7SWei Liu err = -EINVAL; 209560ce86c7SWei Liu goto out_nofid; 209660ce86c7SWei Liu } 209760ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 209860ce86c7SWei Liu if (fidp->fs.fd == -1) { 209960ce86c7SWei Liu err = -EINVAL; 210060ce86c7SWei Liu goto out; 210160ce86c7SWei Liu } 210260ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 210360ce86c7SWei Liu /* 210460ce86c7SWei Liu * setxattr operation 210560ce86c7SWei Liu */ 210660ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 210760ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 210860ce86c7SWei Liu goto out; 210960ce86c7SWei Liu } else { 211060ce86c7SWei Liu err = -EINVAL; 211160ce86c7SWei Liu goto out; 211260ce86c7SWei Liu } 211360ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 211460ce86c7SWei Liu do { 211560ce86c7SWei Liu qemu_iovec_reset(&qiov); 211660ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 211760ce86c7SWei Liu if (0) { 211860ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 211960ce86c7SWei Liu } 212060ce86c7SWei Liu /* Loop in case of EINTR */ 212160ce86c7SWei Liu do { 212260ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 212360ce86c7SWei Liu if (len >= 0) { 212460ce86c7SWei Liu off += len; 212560ce86c7SWei Liu total += len; 212660ce86c7SWei Liu } 212760ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 212860ce86c7SWei Liu if (len < 0) { 212960ce86c7SWei Liu /* IO error return the error */ 213060ce86c7SWei Liu err = len; 213160ce86c7SWei Liu goto out_qiov; 213260ce86c7SWei Liu } 213360ce86c7SWei Liu } while (total < count && len > 0); 213460ce86c7SWei Liu 213560ce86c7SWei Liu offset = 7; 213660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 213760ce86c7SWei Liu if (err < 0) { 2138fdfcc9aeSLi Qiang goto out_qiov; 213960ce86c7SWei Liu } 214060ce86c7SWei Liu err += offset; 214160ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 214260ce86c7SWei Liu out_qiov: 214360ce86c7SWei Liu qemu_iovec_destroy(&qiov); 214460ce86c7SWei Liu out: 214560ce86c7SWei Liu put_fid(pdu, fidp); 214660ce86c7SWei Liu out_nofid: 214760ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 214860ce86c7SWei Liu pdu_complete(pdu, err); 214960ce86c7SWei Liu } 215060ce86c7SWei Liu 21518440e22eSGreg Kurz static void coroutine_fn v9fs_create(void *opaque) 215260ce86c7SWei Liu { 215360ce86c7SWei Liu int32_t fid; 215460ce86c7SWei Liu int err = 0; 215560ce86c7SWei Liu size_t offset = 7; 215660ce86c7SWei Liu V9fsFidState *fidp; 215760ce86c7SWei Liu V9fsQID qid; 215860ce86c7SWei Liu int32_t perm; 215960ce86c7SWei Liu int8_t mode; 216060ce86c7SWei Liu V9fsPath path; 216160ce86c7SWei Liu struct stat stbuf; 216260ce86c7SWei Liu V9fsString name; 216360ce86c7SWei Liu V9fsString extension; 216460ce86c7SWei Liu int iounit; 216560ce86c7SWei Liu V9fsPDU *pdu = opaque; 21665b3c77aaSGreg Kurz V9fsState *s = pdu->s; 216760ce86c7SWei Liu 216860ce86c7SWei Liu v9fs_path_init(&path); 216960ce86c7SWei Liu v9fs_string_init(&name); 217060ce86c7SWei Liu v9fs_string_init(&extension); 217160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 217260ce86c7SWei Liu &perm, &mode, &extension); 217360ce86c7SWei Liu if (err < 0) { 217460ce86c7SWei Liu goto out_nofid; 217560ce86c7SWei Liu } 217660ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 217760ce86c7SWei Liu 2178fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2179fff39a7aSGreg Kurz err = -ENOENT; 2180fff39a7aSGreg Kurz goto out_nofid; 2181fff39a7aSGreg Kurz } 2182fff39a7aSGreg Kurz 2183805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2184805b5d98SGreg Kurz err = -EEXIST; 2185805b5d98SGreg Kurz goto out_nofid; 2186805b5d98SGreg Kurz } 2187805b5d98SGreg Kurz 218860ce86c7SWei Liu fidp = get_fid(pdu, fid); 218960ce86c7SWei Liu if (fidp == NULL) { 219060ce86c7SWei Liu err = -EINVAL; 219160ce86c7SWei Liu goto out_nofid; 219260ce86c7SWei Liu } 2193d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 2194d63fb193SLi Qiang err = -EINVAL; 2195d63fb193SLi Qiang goto out; 2196d63fb193SLi Qiang } 219760ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 219860ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 219960ce86c7SWei Liu fidp->uid, -1, &stbuf); 220060ce86c7SWei Liu if (err < 0) { 220160ce86c7SWei Liu goto out; 220260ce86c7SWei Liu } 220360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 220460ce86c7SWei Liu if (err < 0) { 220560ce86c7SWei Liu goto out; 220660ce86c7SWei Liu } 22075b3c77aaSGreg Kurz v9fs_path_write_lock(s); 220860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22095b3c77aaSGreg Kurz v9fs_path_unlock(s); 221060ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 221160ce86c7SWei Liu if (err < 0) { 221260ce86c7SWei Liu goto out; 221360ce86c7SWei Liu } 221460ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 221560ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 221660ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 221760ce86c7SWei Liu extension.data, -1 , &stbuf); 221860ce86c7SWei Liu if (err < 0) { 221960ce86c7SWei Liu goto out; 222060ce86c7SWei Liu } 222160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 222260ce86c7SWei Liu if (err < 0) { 222360ce86c7SWei Liu goto out; 222460ce86c7SWei Liu } 22255b3c77aaSGreg Kurz v9fs_path_write_lock(s); 222660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22275b3c77aaSGreg Kurz v9fs_path_unlock(s); 222860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 222960ce86c7SWei Liu int32_t ofid = atoi(extension.data); 223060ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 223160ce86c7SWei Liu if (ofidp == NULL) { 223260ce86c7SWei Liu err = -EINVAL; 223360ce86c7SWei Liu goto out; 223460ce86c7SWei Liu } 223560ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 223660ce86c7SWei Liu put_fid(pdu, ofidp); 223760ce86c7SWei Liu if (err < 0) { 223860ce86c7SWei Liu goto out; 223960ce86c7SWei Liu } 224060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 224160ce86c7SWei Liu if (err < 0) { 224260ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 224360ce86c7SWei Liu goto out; 224460ce86c7SWei Liu } 22455b3c77aaSGreg Kurz v9fs_path_write_lock(s); 224660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22475b3c77aaSGreg Kurz v9fs_path_unlock(s); 224860ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 224960ce86c7SWei Liu if (err < 0) { 225060ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 225160ce86c7SWei Liu goto out; 225260ce86c7SWei Liu } 225360ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 225460ce86c7SWei Liu char ctype; 225560ce86c7SWei Liu uint32_t major, minor; 225660ce86c7SWei Liu mode_t nmode = 0; 225760ce86c7SWei Liu 225860ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 225960ce86c7SWei Liu err = -errno; 226060ce86c7SWei Liu goto out; 226160ce86c7SWei Liu } 226260ce86c7SWei Liu 226360ce86c7SWei Liu switch (ctype) { 226460ce86c7SWei Liu case 'c': 226560ce86c7SWei Liu nmode = S_IFCHR; 226660ce86c7SWei Liu break; 226760ce86c7SWei Liu case 'b': 226860ce86c7SWei Liu nmode = S_IFBLK; 226960ce86c7SWei Liu break; 227060ce86c7SWei Liu default: 227160ce86c7SWei Liu err = -EIO; 227260ce86c7SWei Liu goto out; 227360ce86c7SWei Liu } 227460ce86c7SWei Liu 227560ce86c7SWei Liu nmode |= perm & 0777; 227660ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 227760ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 227860ce86c7SWei Liu if (err < 0) { 227960ce86c7SWei Liu goto out; 228060ce86c7SWei Liu } 228160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 228260ce86c7SWei Liu if (err < 0) { 228360ce86c7SWei Liu goto out; 228460ce86c7SWei Liu } 22855b3c77aaSGreg Kurz v9fs_path_write_lock(s); 228660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 22875b3c77aaSGreg Kurz v9fs_path_unlock(s); 228860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 228960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 229060ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 229160ce86c7SWei Liu if (err < 0) { 229260ce86c7SWei Liu goto out; 229360ce86c7SWei Liu } 229460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 229560ce86c7SWei Liu if (err < 0) { 229660ce86c7SWei Liu goto out; 229760ce86c7SWei Liu } 22985b3c77aaSGreg Kurz v9fs_path_write_lock(s); 229960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23005b3c77aaSGreg Kurz v9fs_path_unlock(s); 230160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 230260ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 230360ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 230460ce86c7SWei Liu if (err < 0) { 230560ce86c7SWei Liu goto out; 230660ce86c7SWei Liu } 230760ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 230860ce86c7SWei Liu if (err < 0) { 230960ce86c7SWei Liu goto out; 231060ce86c7SWei Liu } 23115b3c77aaSGreg Kurz v9fs_path_write_lock(s); 231260ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23135b3c77aaSGreg Kurz v9fs_path_unlock(s); 231460ce86c7SWei Liu } else { 231560ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 231660ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 231760ce86c7SWei Liu if (err < 0) { 231860ce86c7SWei Liu goto out; 231960ce86c7SWei Liu } 232060ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 232160ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 232260ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 232360ce86c7SWei Liu /* 232460ce86c7SWei Liu * We let the host file system do O_EXCL check 232560ce86c7SWei Liu * We should not reclaim such fd 232660ce86c7SWei Liu */ 232760ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 232860ce86c7SWei Liu } 232960ce86c7SWei Liu } 233060ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 233160ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 233260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 233360ce86c7SWei Liu if (err < 0) { 233460ce86c7SWei Liu goto out; 233560ce86c7SWei Liu } 233660ce86c7SWei Liu err += offset; 233760ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 233860ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 233960ce86c7SWei Liu out: 234060ce86c7SWei Liu put_fid(pdu, fidp); 234160ce86c7SWei Liu out_nofid: 234260ce86c7SWei Liu pdu_complete(pdu, err); 234360ce86c7SWei Liu v9fs_string_free(&name); 234460ce86c7SWei Liu v9fs_string_free(&extension); 234560ce86c7SWei Liu v9fs_path_free(&path); 234660ce86c7SWei Liu } 234760ce86c7SWei Liu 23488440e22eSGreg Kurz static void coroutine_fn v9fs_symlink(void *opaque) 234960ce86c7SWei Liu { 235060ce86c7SWei Liu V9fsPDU *pdu = opaque; 235160ce86c7SWei Liu V9fsString name; 235260ce86c7SWei Liu V9fsString symname; 235360ce86c7SWei Liu V9fsFidState *dfidp; 235460ce86c7SWei Liu V9fsQID qid; 235560ce86c7SWei Liu struct stat stbuf; 235660ce86c7SWei Liu int32_t dfid; 235760ce86c7SWei Liu int err = 0; 235860ce86c7SWei Liu gid_t gid; 235960ce86c7SWei Liu size_t offset = 7; 236060ce86c7SWei Liu 236160ce86c7SWei Liu v9fs_string_init(&name); 236260ce86c7SWei Liu v9fs_string_init(&symname); 236360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 236460ce86c7SWei Liu if (err < 0) { 236560ce86c7SWei Liu goto out_nofid; 236660ce86c7SWei Liu } 236760ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 236860ce86c7SWei Liu 2369fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2370fff39a7aSGreg Kurz err = -ENOENT; 2371fff39a7aSGreg Kurz goto out_nofid; 2372fff39a7aSGreg Kurz } 2373fff39a7aSGreg Kurz 2374805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2375805b5d98SGreg Kurz err = -EEXIST; 2376805b5d98SGreg Kurz goto out_nofid; 2377805b5d98SGreg Kurz } 2378805b5d98SGreg Kurz 237960ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 238060ce86c7SWei Liu if (dfidp == NULL) { 238160ce86c7SWei Liu err = -EINVAL; 238260ce86c7SWei Liu goto out_nofid; 238360ce86c7SWei Liu } 238460ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 238560ce86c7SWei Liu if (err < 0) { 238660ce86c7SWei Liu goto out; 238760ce86c7SWei Liu } 238860ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 238960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 239060ce86c7SWei Liu if (err < 0) { 239160ce86c7SWei Liu goto out; 239260ce86c7SWei Liu } 239360ce86c7SWei Liu err += offset; 239460ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 239560ce86c7SWei Liu qid.type, qid.version, qid.path); 239660ce86c7SWei Liu out: 239760ce86c7SWei Liu put_fid(pdu, dfidp); 239860ce86c7SWei Liu out_nofid: 239960ce86c7SWei Liu pdu_complete(pdu, err); 240060ce86c7SWei Liu v9fs_string_free(&name); 240160ce86c7SWei Liu v9fs_string_free(&symname); 240260ce86c7SWei Liu } 240360ce86c7SWei Liu 2404a1bf8b74SGreg Kurz static void coroutine_fn v9fs_flush(void *opaque) 240560ce86c7SWei Liu { 240660ce86c7SWei Liu ssize_t err; 240760ce86c7SWei Liu int16_t tag; 240860ce86c7SWei Liu size_t offset = 7; 2409d5f2af7bSGreg Kurz V9fsPDU *cancel_pdu = NULL; 241060ce86c7SWei Liu V9fsPDU *pdu = opaque; 241160ce86c7SWei Liu V9fsState *s = pdu->s; 241260ce86c7SWei Liu 241360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 241460ce86c7SWei Liu if (err < 0) { 241560ce86c7SWei Liu pdu_complete(pdu, err); 241660ce86c7SWei Liu return; 241760ce86c7SWei Liu } 241860ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 241960ce86c7SWei Liu 2420d5f2af7bSGreg Kurz if (pdu->tag == tag) { 24213dc6f869SAlistair Francis warn_report("the guest sent a self-referencing 9P flush request"); 2422d5f2af7bSGreg Kurz } else { 242360ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 242460ce86c7SWei Liu if (cancel_pdu->tag == tag) { 242560ce86c7SWei Liu break; 242660ce86c7SWei Liu } 242760ce86c7SWei Liu } 2428d5f2af7bSGreg Kurz } 242960ce86c7SWei Liu if (cancel_pdu) { 243060ce86c7SWei Liu cancel_pdu->cancelled = 1; 243160ce86c7SWei Liu /* 243260ce86c7SWei Liu * Wait for pdu to complete. 243360ce86c7SWei Liu */ 24341ace7ceaSPaolo Bonzini qemu_co_queue_wait(&cancel_pdu->complete, NULL); 243518adde86SGreg Kurz if (!qemu_co_queue_next(&cancel_pdu->complete)) { 243660ce86c7SWei Liu cancel_pdu->cancelled = 0; 243760ce86c7SWei Liu pdu_free(cancel_pdu); 243860ce86c7SWei Liu } 243918adde86SGreg Kurz } 244060ce86c7SWei Liu pdu_complete(pdu, 7); 244160ce86c7SWei Liu } 244260ce86c7SWei Liu 24438440e22eSGreg Kurz static void coroutine_fn v9fs_link(void *opaque) 244460ce86c7SWei Liu { 244560ce86c7SWei Liu V9fsPDU *pdu = opaque; 244660ce86c7SWei Liu int32_t dfid, oldfid; 244760ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 244860ce86c7SWei Liu V9fsString name; 244960ce86c7SWei Liu size_t offset = 7; 245060ce86c7SWei Liu int err = 0; 245160ce86c7SWei Liu 245260ce86c7SWei Liu v9fs_string_init(&name); 245360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 245460ce86c7SWei Liu if (err < 0) { 245560ce86c7SWei Liu goto out_nofid; 245660ce86c7SWei Liu } 245760ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 245860ce86c7SWei Liu 2459fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2460fff39a7aSGreg Kurz err = -ENOENT; 2461fff39a7aSGreg Kurz goto out_nofid; 2462fff39a7aSGreg Kurz } 2463fff39a7aSGreg Kurz 2464805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2465805b5d98SGreg Kurz err = -EEXIST; 2466805b5d98SGreg Kurz goto out_nofid; 2467805b5d98SGreg Kurz } 2468805b5d98SGreg Kurz 246960ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 247060ce86c7SWei Liu if (dfidp == NULL) { 247160ce86c7SWei Liu err = -ENOENT; 247260ce86c7SWei Liu goto out_nofid; 247360ce86c7SWei Liu } 247460ce86c7SWei Liu 247560ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 247660ce86c7SWei Liu if (oldfidp == NULL) { 247760ce86c7SWei Liu err = -ENOENT; 247860ce86c7SWei Liu goto out; 247960ce86c7SWei Liu } 248060ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 248160ce86c7SWei Liu if (!err) { 248260ce86c7SWei Liu err = offset; 248360ce86c7SWei Liu } 24844c158678SLi Qiang put_fid(pdu, oldfidp); 248560ce86c7SWei Liu out: 248660ce86c7SWei Liu put_fid(pdu, dfidp); 248760ce86c7SWei Liu out_nofid: 248860ce86c7SWei Liu v9fs_string_free(&name); 248960ce86c7SWei Liu pdu_complete(pdu, err); 249060ce86c7SWei Liu } 249160ce86c7SWei Liu 249260ce86c7SWei Liu /* Only works with path name based fid */ 24938440e22eSGreg Kurz static void coroutine_fn v9fs_remove(void *opaque) 249460ce86c7SWei Liu { 249560ce86c7SWei Liu int32_t fid; 249660ce86c7SWei Liu int err = 0; 249760ce86c7SWei Liu size_t offset = 7; 249860ce86c7SWei Liu V9fsFidState *fidp; 249960ce86c7SWei Liu V9fsPDU *pdu = opaque; 250060ce86c7SWei Liu 250160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 250260ce86c7SWei Liu if (err < 0) { 250360ce86c7SWei Liu goto out_nofid; 250460ce86c7SWei Liu } 250560ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 250660ce86c7SWei Liu 250760ce86c7SWei Liu fidp = get_fid(pdu, fid); 250860ce86c7SWei Liu if (fidp == NULL) { 250960ce86c7SWei Liu err = -EINVAL; 251060ce86c7SWei Liu goto out_nofid; 251160ce86c7SWei Liu } 251260ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 251360ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 251460ce86c7SWei Liu err = -EOPNOTSUPP; 251560ce86c7SWei Liu goto out_err; 251660ce86c7SWei Liu } 251760ce86c7SWei Liu /* 251860ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 251960ce86c7SWei Liu * the file later. So don't reclaim fd 252060ce86c7SWei Liu */ 252160ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 252260ce86c7SWei Liu if (err < 0) { 252360ce86c7SWei Liu goto out_err; 252460ce86c7SWei Liu } 252560ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 252660ce86c7SWei Liu if (!err) { 252760ce86c7SWei Liu err = offset; 252860ce86c7SWei Liu } 252960ce86c7SWei Liu out_err: 253060ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 253160ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 253260ce86c7SWei Liu put_fid(pdu, fidp); 253360ce86c7SWei Liu out_nofid: 253460ce86c7SWei Liu pdu_complete(pdu, err); 253560ce86c7SWei Liu } 253660ce86c7SWei Liu 25378440e22eSGreg Kurz static void coroutine_fn v9fs_unlinkat(void *opaque) 253860ce86c7SWei Liu { 253960ce86c7SWei Liu int err = 0; 254060ce86c7SWei Liu V9fsString name; 254167e87345SKeno Fischer int32_t dfid, flags, rflags = 0; 254260ce86c7SWei Liu size_t offset = 7; 254360ce86c7SWei Liu V9fsPath path; 254460ce86c7SWei Liu V9fsFidState *dfidp; 254560ce86c7SWei Liu V9fsPDU *pdu = opaque; 254660ce86c7SWei Liu 254760ce86c7SWei Liu v9fs_string_init(&name); 254860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 254960ce86c7SWei Liu if (err < 0) { 255060ce86c7SWei Liu goto out_nofid; 255160ce86c7SWei Liu } 2552fff39a7aSGreg Kurz 2553fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2554fff39a7aSGreg Kurz err = -ENOENT; 2555fff39a7aSGreg Kurz goto out_nofid; 2556fff39a7aSGreg Kurz } 2557fff39a7aSGreg Kurz 2558805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2559805b5d98SGreg Kurz err = -EINVAL; 2560805b5d98SGreg Kurz goto out_nofid; 2561805b5d98SGreg Kurz } 2562805b5d98SGreg Kurz 2563805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2564805b5d98SGreg Kurz err = -ENOTEMPTY; 2565805b5d98SGreg Kurz goto out_nofid; 2566805b5d98SGreg Kurz } 2567805b5d98SGreg Kurz 256867e87345SKeno Fischer if (flags & ~P9_DOTL_AT_REMOVEDIR) { 256967e87345SKeno Fischer err = -EINVAL; 257067e87345SKeno Fischer goto out_nofid; 257167e87345SKeno Fischer } 257267e87345SKeno Fischer 257367e87345SKeno Fischer if (flags & P9_DOTL_AT_REMOVEDIR) { 257467e87345SKeno Fischer rflags |= AT_REMOVEDIR; 257567e87345SKeno Fischer } 257667e87345SKeno Fischer 257760ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 257860ce86c7SWei Liu if (dfidp == NULL) { 257960ce86c7SWei Liu err = -EINVAL; 258060ce86c7SWei Liu goto out_nofid; 258160ce86c7SWei Liu } 258260ce86c7SWei Liu /* 258360ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 258460ce86c7SWei Liu * the file later. So don't reclaim fd 258560ce86c7SWei Liu */ 258660ce86c7SWei Liu v9fs_path_init(&path); 258760ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 258860ce86c7SWei Liu if (err < 0) { 258960ce86c7SWei Liu goto out_err; 259060ce86c7SWei Liu } 259160ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 259260ce86c7SWei Liu if (err < 0) { 259360ce86c7SWei Liu goto out_err; 259460ce86c7SWei Liu } 259567e87345SKeno Fischer err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, rflags); 259660ce86c7SWei Liu if (!err) { 259760ce86c7SWei Liu err = offset; 259860ce86c7SWei Liu } 259960ce86c7SWei Liu out_err: 260060ce86c7SWei Liu put_fid(pdu, dfidp); 260160ce86c7SWei Liu v9fs_path_free(&path); 260260ce86c7SWei Liu out_nofid: 260360ce86c7SWei Liu pdu_complete(pdu, err); 260460ce86c7SWei Liu v9fs_string_free(&name); 260560ce86c7SWei Liu } 260660ce86c7SWei Liu 260760ce86c7SWei Liu 260860ce86c7SWei Liu /* Only works with path name based fid */ 26098440e22eSGreg Kurz static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 26108440e22eSGreg Kurz int32_t newdirfid, 26118440e22eSGreg Kurz V9fsString *name) 261260ce86c7SWei Liu { 261360ce86c7SWei Liu int err = 0; 261460ce86c7SWei Liu V9fsPath new_path; 261560ce86c7SWei Liu V9fsFidState *tfidp; 261660ce86c7SWei Liu V9fsState *s = pdu->s; 261760ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 261860ce86c7SWei Liu 261960ce86c7SWei Liu v9fs_path_init(&new_path); 262060ce86c7SWei Liu if (newdirfid != -1) { 262160ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 262260ce86c7SWei Liu if (dirfidp == NULL) { 262360ce86c7SWei Liu err = -ENOENT; 262460ce86c7SWei Liu goto out_nofid; 262560ce86c7SWei Liu } 262649dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 262749dd946bSGreg Kurz err = -EINVAL; 262849dd946bSGreg Kurz goto out; 262949dd946bSGreg Kurz } 26304fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 26314fa62005SGreg Kurz if (err < 0) { 26324fa62005SGreg Kurz goto out; 26334fa62005SGreg Kurz } 263460ce86c7SWei Liu } else { 26354d8bc733SJan Dakinevich char *dir_name = g_path_get_dirname(fidp->path.data); 26364d8bc733SJan Dakinevich V9fsPath dir_path; 26374d8bc733SJan Dakinevich 26384d8bc733SJan Dakinevich v9fs_path_init(&dir_path); 26394d8bc733SJan Dakinevich v9fs_path_sprintf(&dir_path, "%s", dir_name); 26404d8bc733SJan Dakinevich g_free(dir_name); 26414d8bc733SJan Dakinevich 26424d8bc733SJan Dakinevich err = v9fs_co_name_to_path(pdu, &dir_path, name->data, &new_path); 26434d8bc733SJan Dakinevich v9fs_path_free(&dir_path); 26444fa62005SGreg Kurz if (err < 0) { 26454fa62005SGreg Kurz goto out; 26464fa62005SGreg Kurz } 264760ce86c7SWei Liu } 264860ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 264960ce86c7SWei Liu if (err < 0) { 265060ce86c7SWei Liu goto out; 265160ce86c7SWei Liu } 265260ce86c7SWei Liu /* 265360ce86c7SWei Liu * Fixup fid's pointing to the old name to 265460ce86c7SWei Liu * start pointing to the new name 265560ce86c7SWei Liu */ 265660ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 265760ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 265860ce86c7SWei Liu /* replace the name */ 265960ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 266060ce86c7SWei Liu } 266160ce86c7SWei Liu } 266260ce86c7SWei Liu out: 266360ce86c7SWei Liu if (dirfidp) { 266460ce86c7SWei Liu put_fid(pdu, dirfidp); 266560ce86c7SWei Liu } 266660ce86c7SWei Liu v9fs_path_free(&new_path); 266760ce86c7SWei Liu out_nofid: 266860ce86c7SWei Liu return err; 266960ce86c7SWei Liu } 267060ce86c7SWei Liu 267160ce86c7SWei Liu /* Only works with path name based fid */ 26728440e22eSGreg Kurz static void coroutine_fn v9fs_rename(void *opaque) 267360ce86c7SWei Liu { 267460ce86c7SWei Liu int32_t fid; 267560ce86c7SWei Liu ssize_t err = 0; 267660ce86c7SWei Liu size_t offset = 7; 267760ce86c7SWei Liu V9fsString name; 267860ce86c7SWei Liu int32_t newdirfid; 267960ce86c7SWei Liu V9fsFidState *fidp; 268060ce86c7SWei Liu V9fsPDU *pdu = opaque; 268160ce86c7SWei Liu V9fsState *s = pdu->s; 268260ce86c7SWei Liu 268360ce86c7SWei Liu v9fs_string_init(&name); 268460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 268560ce86c7SWei Liu if (err < 0) { 268660ce86c7SWei Liu goto out_nofid; 268760ce86c7SWei Liu } 2688fff39a7aSGreg Kurz 2689fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2690fff39a7aSGreg Kurz err = -ENOENT; 2691fff39a7aSGreg Kurz goto out_nofid; 2692fff39a7aSGreg Kurz } 2693fff39a7aSGreg Kurz 2694805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2695805b5d98SGreg Kurz err = -EISDIR; 2696805b5d98SGreg Kurz goto out_nofid; 2697805b5d98SGreg Kurz } 2698805b5d98SGreg Kurz 269960ce86c7SWei Liu fidp = get_fid(pdu, fid); 270060ce86c7SWei Liu if (fidp == NULL) { 270160ce86c7SWei Liu err = -ENOENT; 270260ce86c7SWei Liu goto out_nofid; 270360ce86c7SWei Liu } 270449dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 270549dd946bSGreg Kurz err = -EINVAL; 270649dd946bSGreg Kurz goto out; 270749dd946bSGreg Kurz } 270860ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 270960ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 271060ce86c7SWei Liu err = -EOPNOTSUPP; 271160ce86c7SWei Liu goto out; 271260ce86c7SWei Liu } 271360ce86c7SWei Liu v9fs_path_write_lock(s); 271460ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 271560ce86c7SWei Liu v9fs_path_unlock(s); 271660ce86c7SWei Liu if (!err) { 271760ce86c7SWei Liu err = offset; 271860ce86c7SWei Liu } 271960ce86c7SWei Liu out: 272060ce86c7SWei Liu put_fid(pdu, fidp); 272160ce86c7SWei Liu out_nofid: 272260ce86c7SWei Liu pdu_complete(pdu, err); 272360ce86c7SWei Liu v9fs_string_free(&name); 272460ce86c7SWei Liu } 272560ce86c7SWei Liu 27264fa62005SGreg Kurz static int coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 27278440e22eSGreg Kurz V9fsString *old_name, 27288440e22eSGreg Kurz V9fsPath *newdir, 272960ce86c7SWei Liu V9fsString *new_name) 273060ce86c7SWei Liu { 273160ce86c7SWei Liu V9fsFidState *tfidp; 273260ce86c7SWei Liu V9fsPath oldpath, newpath; 273360ce86c7SWei Liu V9fsState *s = pdu->s; 27344fa62005SGreg Kurz int err; 273560ce86c7SWei Liu 273660ce86c7SWei Liu v9fs_path_init(&oldpath); 273760ce86c7SWei Liu v9fs_path_init(&newpath); 27384fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 27394fa62005SGreg Kurz if (err < 0) { 27404fa62005SGreg Kurz goto out; 27414fa62005SGreg Kurz } 27424fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 27434fa62005SGreg Kurz if (err < 0) { 27444fa62005SGreg Kurz goto out; 27454fa62005SGreg Kurz } 274660ce86c7SWei Liu 274760ce86c7SWei Liu /* 274860ce86c7SWei Liu * Fixup fid's pointing to the old name to 274960ce86c7SWei Liu * start pointing to the new name 275060ce86c7SWei Liu */ 275160ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 275260ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 275360ce86c7SWei Liu /* replace the name */ 275460ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 275560ce86c7SWei Liu } 275660ce86c7SWei Liu } 27574fa62005SGreg Kurz out: 275860ce86c7SWei Liu v9fs_path_free(&oldpath); 275960ce86c7SWei Liu v9fs_path_free(&newpath); 27604fa62005SGreg Kurz return err; 276160ce86c7SWei Liu } 276260ce86c7SWei Liu 27638440e22eSGreg Kurz static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 27648440e22eSGreg Kurz V9fsString *old_name, 27658440e22eSGreg Kurz int32_t newdirfid, 276660ce86c7SWei Liu V9fsString *new_name) 276760ce86c7SWei Liu { 276860ce86c7SWei Liu int err = 0; 276960ce86c7SWei Liu V9fsState *s = pdu->s; 277060ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 277160ce86c7SWei Liu 277260ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 277360ce86c7SWei Liu if (olddirfidp == NULL) { 277460ce86c7SWei Liu err = -ENOENT; 277560ce86c7SWei Liu goto out; 277660ce86c7SWei Liu } 277760ce86c7SWei Liu if (newdirfid != -1) { 277860ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 277960ce86c7SWei Liu if (newdirfidp == NULL) { 278060ce86c7SWei Liu err = -ENOENT; 278160ce86c7SWei Liu goto out; 278260ce86c7SWei Liu } 278360ce86c7SWei Liu } else { 278460ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 278560ce86c7SWei Liu } 278660ce86c7SWei Liu 278760ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 278860ce86c7SWei Liu &newdirfidp->path, new_name); 278960ce86c7SWei Liu if (err < 0) { 279060ce86c7SWei Liu goto out; 279160ce86c7SWei Liu } 279260ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 279360ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 27944fa62005SGreg Kurz err = v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 279560ce86c7SWei Liu &newdirfidp->path, new_name); 279660ce86c7SWei Liu } 279760ce86c7SWei Liu out: 279860ce86c7SWei Liu if (olddirfidp) { 279960ce86c7SWei Liu put_fid(pdu, olddirfidp); 280060ce86c7SWei Liu } 280160ce86c7SWei Liu if (newdirfidp) { 280260ce86c7SWei Liu put_fid(pdu, newdirfidp); 280360ce86c7SWei Liu } 280460ce86c7SWei Liu return err; 280560ce86c7SWei Liu } 280660ce86c7SWei Liu 28078440e22eSGreg Kurz static void coroutine_fn v9fs_renameat(void *opaque) 280860ce86c7SWei Liu { 280960ce86c7SWei Liu ssize_t err = 0; 281060ce86c7SWei Liu size_t offset = 7; 281160ce86c7SWei Liu V9fsPDU *pdu = opaque; 281260ce86c7SWei Liu V9fsState *s = pdu->s; 281360ce86c7SWei Liu int32_t olddirfid, newdirfid; 281460ce86c7SWei Liu V9fsString old_name, new_name; 281560ce86c7SWei Liu 281660ce86c7SWei Liu v9fs_string_init(&old_name); 281760ce86c7SWei Liu v9fs_string_init(&new_name); 281860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 281960ce86c7SWei Liu &old_name, &newdirfid, &new_name); 282060ce86c7SWei Liu if (err < 0) { 282160ce86c7SWei Liu goto out_err; 282260ce86c7SWei Liu } 282360ce86c7SWei Liu 2824fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 2825fff39a7aSGreg Kurz err = -ENOENT; 2826fff39a7aSGreg Kurz goto out_err; 2827fff39a7aSGreg Kurz } 2828fff39a7aSGreg Kurz 2829805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 2830805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 2831805b5d98SGreg Kurz err = -EISDIR; 2832805b5d98SGreg Kurz goto out_err; 2833805b5d98SGreg Kurz } 2834805b5d98SGreg Kurz 283560ce86c7SWei Liu v9fs_path_write_lock(s); 283660ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 283760ce86c7SWei Liu &old_name, newdirfid, &new_name); 283860ce86c7SWei Liu v9fs_path_unlock(s); 283960ce86c7SWei Liu if (!err) { 284060ce86c7SWei Liu err = offset; 284160ce86c7SWei Liu } 284260ce86c7SWei Liu 284360ce86c7SWei Liu out_err: 284460ce86c7SWei Liu pdu_complete(pdu, err); 284560ce86c7SWei Liu v9fs_string_free(&old_name); 284660ce86c7SWei Liu v9fs_string_free(&new_name); 284760ce86c7SWei Liu } 284860ce86c7SWei Liu 28498440e22eSGreg Kurz static void coroutine_fn v9fs_wstat(void *opaque) 285060ce86c7SWei Liu { 285160ce86c7SWei Liu int32_t fid; 285260ce86c7SWei Liu int err = 0; 285360ce86c7SWei Liu int16_t unused; 285460ce86c7SWei Liu V9fsStat v9stat; 285560ce86c7SWei Liu size_t offset = 7; 285660ce86c7SWei Liu struct stat stbuf; 285760ce86c7SWei Liu V9fsFidState *fidp; 285860ce86c7SWei Liu V9fsPDU *pdu = opaque; 28591d203986SGreg Kurz V9fsState *s = pdu->s; 286060ce86c7SWei Liu 286160ce86c7SWei Liu v9fs_stat_init(&v9stat); 286260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 286360ce86c7SWei Liu if (err < 0) { 286460ce86c7SWei Liu goto out_nofid; 286560ce86c7SWei Liu } 286660ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 286760ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 286860ce86c7SWei Liu 286960ce86c7SWei Liu fidp = get_fid(pdu, fid); 287060ce86c7SWei Liu if (fidp == NULL) { 287160ce86c7SWei Liu err = -EINVAL; 287260ce86c7SWei Liu goto out_nofid; 287360ce86c7SWei Liu } 287460ce86c7SWei Liu /* do we need to sync the file? */ 287560ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 287660ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 287760ce86c7SWei Liu goto out; 287860ce86c7SWei Liu } 287960ce86c7SWei Liu if (v9stat.mode != -1) { 288060ce86c7SWei Liu uint32_t v9_mode; 288160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 288260ce86c7SWei Liu if (err < 0) { 288360ce86c7SWei Liu goto out; 288460ce86c7SWei Liu } 288560ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 288660ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 288760ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 288860ce86c7SWei Liu /* Attempting to change the type */ 288960ce86c7SWei Liu err = -EIO; 289060ce86c7SWei Liu goto out; 289160ce86c7SWei Liu } 289260ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 289360ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 289460ce86c7SWei Liu &v9stat.extension)); 289560ce86c7SWei Liu if (err < 0) { 289660ce86c7SWei Liu goto out; 289760ce86c7SWei Liu } 289860ce86c7SWei Liu } 289960ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 290060ce86c7SWei Liu struct timespec times[2]; 290160ce86c7SWei Liu if (v9stat.atime != -1) { 290260ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 290360ce86c7SWei Liu times[0].tv_nsec = 0; 290460ce86c7SWei Liu } else { 290560ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 290660ce86c7SWei Liu } 290760ce86c7SWei Liu if (v9stat.mtime != -1) { 290860ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 290960ce86c7SWei Liu times[1].tv_nsec = 0; 291060ce86c7SWei Liu } else { 291160ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 291260ce86c7SWei Liu } 291360ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 291460ce86c7SWei Liu if (err < 0) { 291560ce86c7SWei Liu goto out; 291660ce86c7SWei Liu } 291760ce86c7SWei Liu } 291860ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 291960ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 292060ce86c7SWei Liu if (err < 0) { 292160ce86c7SWei Liu goto out; 292260ce86c7SWei Liu } 292360ce86c7SWei Liu } 292460ce86c7SWei Liu if (v9stat.name.size != 0) { 29251d203986SGreg Kurz v9fs_path_write_lock(s); 292660ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 29271d203986SGreg Kurz v9fs_path_unlock(s); 292860ce86c7SWei Liu if (err < 0) { 292960ce86c7SWei Liu goto out; 293060ce86c7SWei Liu } 293160ce86c7SWei Liu } 293260ce86c7SWei Liu if (v9stat.length != -1) { 293360ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 293460ce86c7SWei Liu if (err < 0) { 293560ce86c7SWei Liu goto out; 293660ce86c7SWei Liu } 293760ce86c7SWei Liu } 293860ce86c7SWei Liu err = offset; 293960ce86c7SWei Liu out: 294060ce86c7SWei Liu put_fid(pdu, fidp); 294160ce86c7SWei Liu out_nofid: 294260ce86c7SWei Liu v9fs_stat_free(&v9stat); 294360ce86c7SWei Liu pdu_complete(pdu, err); 294460ce86c7SWei Liu } 294560ce86c7SWei Liu 294660ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 294760ce86c7SWei Liu { 294860ce86c7SWei Liu uint32_t f_type; 294960ce86c7SWei Liu uint32_t f_bsize; 295060ce86c7SWei Liu uint64_t f_blocks; 295160ce86c7SWei Liu uint64_t f_bfree; 295260ce86c7SWei Liu uint64_t f_bavail; 295360ce86c7SWei Liu uint64_t f_files; 295460ce86c7SWei Liu uint64_t f_ffree; 295560ce86c7SWei Liu uint64_t fsid_val; 295660ce86c7SWei Liu uint32_t f_namelen; 295760ce86c7SWei Liu size_t offset = 7; 295860ce86c7SWei Liu int32_t bsize_factor; 295960ce86c7SWei Liu 296060ce86c7SWei Liu /* 296160ce86c7SWei Liu * compute bsize factor based on host file system block size 296260ce86c7SWei Liu * and client msize 296360ce86c7SWei Liu */ 296460ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 296560ce86c7SWei Liu if (!bsize_factor) { 296660ce86c7SWei Liu bsize_factor = 1; 296760ce86c7SWei Liu } 296860ce86c7SWei Liu f_type = stbuf->f_type; 296960ce86c7SWei Liu f_bsize = stbuf->f_bsize; 297060ce86c7SWei Liu f_bsize *= bsize_factor; 297160ce86c7SWei Liu /* 297260ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 297360ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 297460ce86c7SWei Liu * blocks by bsize factor 297560ce86c7SWei Liu */ 297660ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 297760ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 297860ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 297960ce86c7SWei Liu f_files = stbuf->f_files; 298060ce86c7SWei Liu f_ffree = stbuf->f_ffree; 298160ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 298260ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 298360ce86c7SWei Liu f_namelen = stbuf->f_namelen; 298460ce86c7SWei Liu 298560ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 298660ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 298760ce86c7SWei Liu f_bavail, f_files, f_ffree, 298860ce86c7SWei Liu fsid_val, f_namelen); 298960ce86c7SWei Liu } 299060ce86c7SWei Liu 29918440e22eSGreg Kurz static void coroutine_fn v9fs_statfs(void *opaque) 299260ce86c7SWei Liu { 299360ce86c7SWei Liu int32_t fid; 299460ce86c7SWei Liu ssize_t retval = 0; 299560ce86c7SWei Liu size_t offset = 7; 299660ce86c7SWei Liu V9fsFidState *fidp; 299760ce86c7SWei Liu struct statfs stbuf; 299860ce86c7SWei Liu V9fsPDU *pdu = opaque; 299960ce86c7SWei Liu V9fsState *s = pdu->s; 300060ce86c7SWei Liu 300160ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 300260ce86c7SWei Liu if (retval < 0) { 300360ce86c7SWei Liu goto out_nofid; 300460ce86c7SWei Liu } 300560ce86c7SWei Liu fidp = get_fid(pdu, fid); 300660ce86c7SWei Liu if (fidp == NULL) { 300760ce86c7SWei Liu retval = -ENOENT; 300860ce86c7SWei Liu goto out_nofid; 300960ce86c7SWei Liu } 301060ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 301160ce86c7SWei Liu if (retval < 0) { 301260ce86c7SWei Liu goto out; 301360ce86c7SWei Liu } 301460ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 301560ce86c7SWei Liu if (retval < 0) { 301660ce86c7SWei Liu goto out; 301760ce86c7SWei Liu } 301860ce86c7SWei Liu retval += offset; 301960ce86c7SWei Liu out: 302060ce86c7SWei Liu put_fid(pdu, fidp); 302160ce86c7SWei Liu out_nofid: 302260ce86c7SWei Liu pdu_complete(pdu, retval); 302360ce86c7SWei Liu } 302460ce86c7SWei Liu 30258440e22eSGreg Kurz static void coroutine_fn v9fs_mknod(void *opaque) 302660ce86c7SWei Liu { 302760ce86c7SWei Liu 302860ce86c7SWei Liu int mode; 302960ce86c7SWei Liu gid_t gid; 303060ce86c7SWei Liu int32_t fid; 303160ce86c7SWei Liu V9fsQID qid; 303260ce86c7SWei Liu int err = 0; 303360ce86c7SWei Liu int major, minor; 303460ce86c7SWei Liu size_t offset = 7; 303560ce86c7SWei Liu V9fsString name; 303660ce86c7SWei Liu struct stat stbuf; 303760ce86c7SWei Liu V9fsFidState *fidp; 303860ce86c7SWei Liu V9fsPDU *pdu = opaque; 303960ce86c7SWei Liu 304060ce86c7SWei Liu v9fs_string_init(&name); 304160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 304260ce86c7SWei Liu &major, &minor, &gid); 304360ce86c7SWei Liu if (err < 0) { 304460ce86c7SWei Liu goto out_nofid; 304560ce86c7SWei Liu } 304660ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 304760ce86c7SWei Liu 3048fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3049fff39a7aSGreg Kurz err = -ENOENT; 3050fff39a7aSGreg Kurz goto out_nofid; 3051fff39a7aSGreg Kurz } 3052fff39a7aSGreg Kurz 3053805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3054805b5d98SGreg Kurz err = -EEXIST; 3055805b5d98SGreg Kurz goto out_nofid; 3056805b5d98SGreg Kurz } 3057805b5d98SGreg Kurz 305860ce86c7SWei Liu fidp = get_fid(pdu, fid); 305960ce86c7SWei Liu if (fidp == NULL) { 306060ce86c7SWei Liu err = -ENOENT; 306160ce86c7SWei Liu goto out_nofid; 306260ce86c7SWei Liu } 306360ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 306460ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 306560ce86c7SWei Liu if (err < 0) { 306660ce86c7SWei Liu goto out; 306760ce86c7SWei Liu } 306860ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 306960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 307060ce86c7SWei Liu if (err < 0) { 307160ce86c7SWei Liu goto out; 307260ce86c7SWei Liu } 307360ce86c7SWei Liu err += offset; 307460ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 307560ce86c7SWei Liu qid.type, qid.version, qid.path); 307660ce86c7SWei Liu out: 307760ce86c7SWei Liu put_fid(pdu, fidp); 307860ce86c7SWei Liu out_nofid: 307960ce86c7SWei Liu pdu_complete(pdu, err); 308060ce86c7SWei Liu v9fs_string_free(&name); 308160ce86c7SWei Liu } 308260ce86c7SWei Liu 308360ce86c7SWei Liu /* 308460ce86c7SWei Liu * Implement posix byte range locking code 308560ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 308660ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 308760ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 308860ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 308960ce86c7SWei Liu * So when a TLOCK request comes, always return success 309060ce86c7SWei Liu */ 30918440e22eSGreg Kurz static void coroutine_fn v9fs_lock(void *opaque) 309260ce86c7SWei Liu { 309360ce86c7SWei Liu V9fsFlock flock; 309460ce86c7SWei Liu size_t offset = 7; 309560ce86c7SWei Liu struct stat stbuf; 309660ce86c7SWei Liu V9fsFidState *fidp; 309760ce86c7SWei Liu int32_t fid, err = 0; 309860ce86c7SWei Liu V9fsPDU *pdu = opaque; 309960ce86c7SWei Liu 310060ce86c7SWei Liu v9fs_string_init(&flock.client_id); 310160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 310260ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 310360ce86c7SWei Liu &flock.proc_id, &flock.client_id); 310460ce86c7SWei Liu if (err < 0) { 310560ce86c7SWei Liu goto out_nofid; 310660ce86c7SWei Liu } 310760ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 310860ce86c7SWei Liu flock.type, flock.start, flock.length); 310960ce86c7SWei Liu 311060ce86c7SWei Liu 311160ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 311260ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 311360ce86c7SWei Liu err = -EINVAL; 311460ce86c7SWei Liu goto out_nofid; 311560ce86c7SWei Liu } 311660ce86c7SWei Liu fidp = get_fid(pdu, fid); 311760ce86c7SWei Liu if (fidp == NULL) { 311860ce86c7SWei Liu err = -ENOENT; 311960ce86c7SWei Liu goto out_nofid; 312060ce86c7SWei Liu } 312160ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 312260ce86c7SWei Liu if (err < 0) { 312360ce86c7SWei Liu goto out; 312460ce86c7SWei Liu } 31254bae2b39SPaolo Bonzini err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); 31264bae2b39SPaolo Bonzini if (err < 0) { 31274bae2b39SPaolo Bonzini goto out; 31284bae2b39SPaolo Bonzini } 31294bae2b39SPaolo Bonzini err += offset; 31304bae2b39SPaolo Bonzini trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); 313160ce86c7SWei Liu out: 313260ce86c7SWei Liu put_fid(pdu, fidp); 313360ce86c7SWei Liu out_nofid: 313460ce86c7SWei Liu pdu_complete(pdu, err); 313560ce86c7SWei Liu v9fs_string_free(&flock.client_id); 313660ce86c7SWei Liu } 313760ce86c7SWei Liu 313860ce86c7SWei Liu /* 313960ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 314060ce86c7SWei Liu * handling is done by client's VFS layer. 314160ce86c7SWei Liu */ 31428440e22eSGreg Kurz static void coroutine_fn v9fs_getlock(void *opaque) 314360ce86c7SWei Liu { 314460ce86c7SWei Liu size_t offset = 7; 314560ce86c7SWei Liu struct stat stbuf; 314660ce86c7SWei Liu V9fsFidState *fidp; 314760ce86c7SWei Liu V9fsGetlock glock; 314860ce86c7SWei Liu int32_t fid, err = 0; 314960ce86c7SWei Liu V9fsPDU *pdu = opaque; 315060ce86c7SWei Liu 315160ce86c7SWei Liu v9fs_string_init(&glock.client_id); 315260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 315360ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 315460ce86c7SWei Liu &glock.client_id); 315560ce86c7SWei Liu if (err < 0) { 315660ce86c7SWei Liu goto out_nofid; 315760ce86c7SWei Liu } 315860ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 315960ce86c7SWei Liu glock.type, glock.start, glock.length); 316060ce86c7SWei Liu 316160ce86c7SWei Liu fidp = get_fid(pdu, fid); 316260ce86c7SWei Liu if (fidp == NULL) { 316360ce86c7SWei Liu err = -ENOENT; 316460ce86c7SWei Liu goto out_nofid; 316560ce86c7SWei Liu } 316660ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 316760ce86c7SWei Liu if (err < 0) { 316860ce86c7SWei Liu goto out; 316960ce86c7SWei Liu } 317060ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 317160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 317260ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 317360ce86c7SWei Liu &glock.client_id); 317460ce86c7SWei Liu if (err < 0) { 317560ce86c7SWei Liu goto out; 317660ce86c7SWei Liu } 317760ce86c7SWei Liu err += offset; 317860ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 317960ce86c7SWei Liu glock.length, glock.proc_id); 318060ce86c7SWei Liu out: 318160ce86c7SWei Liu put_fid(pdu, fidp); 318260ce86c7SWei Liu out_nofid: 318360ce86c7SWei Liu pdu_complete(pdu, err); 318460ce86c7SWei Liu v9fs_string_free(&glock.client_id); 318560ce86c7SWei Liu } 318660ce86c7SWei Liu 31878440e22eSGreg Kurz static void coroutine_fn v9fs_mkdir(void *opaque) 318860ce86c7SWei Liu { 318960ce86c7SWei Liu V9fsPDU *pdu = opaque; 319060ce86c7SWei Liu size_t offset = 7; 319160ce86c7SWei Liu int32_t fid; 319260ce86c7SWei Liu struct stat stbuf; 319360ce86c7SWei Liu V9fsQID qid; 319460ce86c7SWei Liu V9fsString name; 319560ce86c7SWei Liu V9fsFidState *fidp; 319660ce86c7SWei Liu gid_t gid; 319760ce86c7SWei Liu int mode; 319860ce86c7SWei Liu int err = 0; 319960ce86c7SWei Liu 320060ce86c7SWei Liu v9fs_string_init(&name); 320160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 320260ce86c7SWei Liu if (err < 0) { 320360ce86c7SWei Liu goto out_nofid; 320460ce86c7SWei Liu } 320560ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 320660ce86c7SWei Liu 3207fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3208fff39a7aSGreg Kurz err = -ENOENT; 3209fff39a7aSGreg Kurz goto out_nofid; 3210fff39a7aSGreg Kurz } 3211fff39a7aSGreg Kurz 3212805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3213805b5d98SGreg Kurz err = -EEXIST; 3214805b5d98SGreg Kurz goto out_nofid; 3215805b5d98SGreg Kurz } 3216805b5d98SGreg Kurz 321760ce86c7SWei Liu fidp = get_fid(pdu, fid); 321860ce86c7SWei Liu if (fidp == NULL) { 321960ce86c7SWei Liu err = -ENOENT; 322060ce86c7SWei Liu goto out_nofid; 322160ce86c7SWei Liu } 322260ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 322360ce86c7SWei Liu if (err < 0) { 322460ce86c7SWei Liu goto out; 322560ce86c7SWei Liu } 322660ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 322760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 322860ce86c7SWei Liu if (err < 0) { 322960ce86c7SWei Liu goto out; 323060ce86c7SWei Liu } 323160ce86c7SWei Liu err += offset; 323260ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 323360ce86c7SWei Liu qid.type, qid.version, qid.path, err); 323460ce86c7SWei Liu out: 323560ce86c7SWei Liu put_fid(pdu, fidp); 323660ce86c7SWei Liu out_nofid: 323760ce86c7SWei Liu pdu_complete(pdu, err); 323860ce86c7SWei Liu v9fs_string_free(&name); 323960ce86c7SWei Liu } 324060ce86c7SWei Liu 32418440e22eSGreg Kurz static void coroutine_fn v9fs_xattrwalk(void *opaque) 324260ce86c7SWei Liu { 324360ce86c7SWei Liu int64_t size; 324460ce86c7SWei Liu V9fsString name; 324560ce86c7SWei Liu ssize_t err = 0; 324660ce86c7SWei Liu size_t offset = 7; 324760ce86c7SWei Liu int32_t fid, newfid; 324860ce86c7SWei Liu V9fsFidState *file_fidp; 324960ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 325060ce86c7SWei Liu V9fsPDU *pdu = opaque; 325160ce86c7SWei Liu V9fsState *s = pdu->s; 325260ce86c7SWei Liu 325360ce86c7SWei Liu v9fs_string_init(&name); 325460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 325560ce86c7SWei Liu if (err < 0) { 325660ce86c7SWei Liu goto out_nofid; 325760ce86c7SWei Liu } 325860ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 325960ce86c7SWei Liu 326060ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 326160ce86c7SWei Liu if (file_fidp == NULL) { 326260ce86c7SWei Liu err = -ENOENT; 326360ce86c7SWei Liu goto out_nofid; 326460ce86c7SWei Liu } 326560ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 326660ce86c7SWei Liu if (xattr_fidp == NULL) { 326760ce86c7SWei Liu err = -EINVAL; 326860ce86c7SWei Liu goto out; 326960ce86c7SWei Liu } 327060ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 3271ba42ebb8SLi Qiang if (!v9fs_string_size(&name)) { 327260ce86c7SWei Liu /* 327360ce86c7SWei Liu * listxattr request. Get the size first 327460ce86c7SWei Liu */ 327560ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 327660ce86c7SWei Liu if (size < 0) { 327760ce86c7SWei Liu err = size; 327860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 327960ce86c7SWei Liu goto out; 328060ce86c7SWei Liu } 328160ce86c7SWei Liu /* 328260ce86c7SWei Liu * Read the xattr value 328360ce86c7SWei Liu */ 328460ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 328560ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3286dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 32877bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3288a647502cSKeno Fischer if (size) { 328960ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 329060ce86c7SWei Liu xattr_fidp->fs.xattr.value, 329160ce86c7SWei Liu xattr_fidp->fs.xattr.len); 329260ce86c7SWei Liu if (err < 0) { 329360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 329460ce86c7SWei Liu goto out; 329560ce86c7SWei Liu } 329660ce86c7SWei Liu } 329760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 329860ce86c7SWei Liu if (err < 0) { 329960ce86c7SWei Liu goto out; 330060ce86c7SWei Liu } 330160ce86c7SWei Liu err += offset; 330260ce86c7SWei Liu } else { 330360ce86c7SWei Liu /* 330460ce86c7SWei Liu * specific xattr fid. We check for xattr 330560ce86c7SWei Liu * presence also collect the xattr size 330660ce86c7SWei Liu */ 330760ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 330860ce86c7SWei Liu &name, NULL, 0); 330960ce86c7SWei Liu if (size < 0) { 331060ce86c7SWei Liu err = size; 331160ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 331260ce86c7SWei Liu goto out; 331360ce86c7SWei Liu } 331460ce86c7SWei Liu /* 331560ce86c7SWei Liu * Read the xattr value 331660ce86c7SWei Liu */ 331760ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 331860ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3319dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 33207bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3321a647502cSKeno Fischer if (size) { 332260ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 332360ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 332460ce86c7SWei Liu xattr_fidp->fs.xattr.len); 332560ce86c7SWei Liu if (err < 0) { 332660ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 332760ce86c7SWei Liu goto out; 332860ce86c7SWei Liu } 332960ce86c7SWei Liu } 333060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 333160ce86c7SWei Liu if (err < 0) { 333260ce86c7SWei Liu goto out; 333360ce86c7SWei Liu } 333460ce86c7SWei Liu err += offset; 333560ce86c7SWei Liu } 333660ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 333760ce86c7SWei Liu out: 333860ce86c7SWei Liu put_fid(pdu, file_fidp); 333960ce86c7SWei Liu if (xattr_fidp) { 334060ce86c7SWei Liu put_fid(pdu, xattr_fidp); 334160ce86c7SWei Liu } 334260ce86c7SWei Liu out_nofid: 334360ce86c7SWei Liu pdu_complete(pdu, err); 334460ce86c7SWei Liu v9fs_string_free(&name); 334560ce86c7SWei Liu } 334660ce86c7SWei Liu 33478440e22eSGreg Kurz static void coroutine_fn v9fs_xattrcreate(void *opaque) 334860ce86c7SWei Liu { 3349aca6897fSKeno Fischer int flags, rflags = 0; 335060ce86c7SWei Liu int32_t fid; 33513b79ef2cSGreg Kurz uint64_t size; 335260ce86c7SWei Liu ssize_t err = 0; 335360ce86c7SWei Liu V9fsString name; 335460ce86c7SWei Liu size_t offset = 7; 335560ce86c7SWei Liu V9fsFidState *file_fidp; 335660ce86c7SWei Liu V9fsFidState *xattr_fidp; 335760ce86c7SWei Liu V9fsPDU *pdu = opaque; 335860ce86c7SWei Liu 335960ce86c7SWei Liu v9fs_string_init(&name); 336060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 336160ce86c7SWei Liu if (err < 0) { 336260ce86c7SWei Liu goto out_nofid; 336360ce86c7SWei Liu } 336460ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 336560ce86c7SWei Liu 3366aca6897fSKeno Fischer if (flags & ~(P9_XATTR_CREATE | P9_XATTR_REPLACE)) { 3367aca6897fSKeno Fischer err = -EINVAL; 3368aca6897fSKeno Fischer goto out_nofid; 3369aca6897fSKeno Fischer } 3370aca6897fSKeno Fischer 3371aca6897fSKeno Fischer if (flags & P9_XATTR_CREATE) { 3372aca6897fSKeno Fischer rflags |= XATTR_CREATE; 3373aca6897fSKeno Fischer } 3374aca6897fSKeno Fischer 3375aca6897fSKeno Fischer if (flags & P9_XATTR_REPLACE) { 3376aca6897fSKeno Fischer rflags |= XATTR_REPLACE; 3377aca6897fSKeno Fischer } 3378aca6897fSKeno Fischer 33793b79ef2cSGreg Kurz if (size > XATTR_SIZE_MAX) { 33803b79ef2cSGreg Kurz err = -E2BIG; 33813b79ef2cSGreg Kurz goto out_nofid; 33823b79ef2cSGreg Kurz } 33833b79ef2cSGreg Kurz 338460ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 338560ce86c7SWei Liu if (file_fidp == NULL) { 338660ce86c7SWei Liu err = -EINVAL; 338760ce86c7SWei Liu goto out_nofid; 338860ce86c7SWei Liu } 3389dd654e03SGreg Kurz if (file_fidp->fid_type != P9_FID_NONE) { 3390dd654e03SGreg Kurz err = -EINVAL; 3391dd654e03SGreg Kurz goto out_put_fid; 3392dd654e03SGreg Kurz } 3393dd654e03SGreg Kurz 339460ce86c7SWei Liu /* Make the file fid point to xattr */ 339560ce86c7SWei Liu xattr_fidp = file_fidp; 339660ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 339760ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 3398dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = false; 339960ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 3400aca6897fSKeno Fischer xattr_fidp->fs.xattr.flags = rflags; 340160ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 340260ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 3403eb687602SLi Qiang xattr_fidp->fs.xattr.value = g_malloc0(size); 340460ce86c7SWei Liu err = offset; 3405dd654e03SGreg Kurz out_put_fid: 340660ce86c7SWei Liu put_fid(pdu, file_fidp); 340760ce86c7SWei Liu out_nofid: 340860ce86c7SWei Liu pdu_complete(pdu, err); 340960ce86c7SWei Liu v9fs_string_free(&name); 341060ce86c7SWei Liu } 341160ce86c7SWei Liu 34128440e22eSGreg Kurz static void coroutine_fn v9fs_readlink(void *opaque) 341360ce86c7SWei Liu { 341460ce86c7SWei Liu V9fsPDU *pdu = opaque; 341560ce86c7SWei Liu size_t offset = 7; 341660ce86c7SWei Liu V9fsString target; 341760ce86c7SWei Liu int32_t fid; 341860ce86c7SWei Liu int err = 0; 341960ce86c7SWei Liu V9fsFidState *fidp; 342060ce86c7SWei Liu 342160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 342260ce86c7SWei Liu if (err < 0) { 342360ce86c7SWei Liu goto out_nofid; 342460ce86c7SWei Liu } 342560ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 342660ce86c7SWei Liu fidp = get_fid(pdu, fid); 342760ce86c7SWei Liu if (fidp == NULL) { 342860ce86c7SWei Liu err = -ENOENT; 342960ce86c7SWei Liu goto out_nofid; 343060ce86c7SWei Liu } 343160ce86c7SWei Liu 343260ce86c7SWei Liu v9fs_string_init(&target); 343360ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 343460ce86c7SWei Liu if (err < 0) { 343560ce86c7SWei Liu goto out; 343660ce86c7SWei Liu } 343760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 343860ce86c7SWei Liu if (err < 0) { 343960ce86c7SWei Liu v9fs_string_free(&target); 344060ce86c7SWei Liu goto out; 344160ce86c7SWei Liu } 344260ce86c7SWei Liu err += offset; 344360ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 344460ce86c7SWei Liu v9fs_string_free(&target); 344560ce86c7SWei Liu out: 344660ce86c7SWei Liu put_fid(pdu, fidp); 344760ce86c7SWei Liu out_nofid: 344860ce86c7SWei Liu pdu_complete(pdu, err); 344960ce86c7SWei Liu } 345060ce86c7SWei Liu 345160ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 345260ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 345360ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 345460ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 345560ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 345660ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 345760ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 345860ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 345960ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 346060ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 346160ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 346260ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 346360ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 346460ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 346560ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 346660ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 346760ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 346860ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 346960ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 347060ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 347160ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 347260ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 347360ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 347460ce86c7SWei Liu [P9_TREAD] = v9fs_read, 347560ce86c7SWei Liu #if 0 347660ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 347760ce86c7SWei Liu #endif 347860ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 347960ce86c7SWei Liu [P9_TLINK] = v9fs_link, 348060ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 348160ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 348260ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 348360ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 348460ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 348560ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 348660ce86c7SWei Liu }; 348760ce86c7SWei Liu 34888440e22eSGreg Kurz static void coroutine_fn v9fs_op_not_supp(void *opaque) 348960ce86c7SWei Liu { 349060ce86c7SWei Liu V9fsPDU *pdu = opaque; 349160ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 349260ce86c7SWei Liu } 349360ce86c7SWei Liu 34948440e22eSGreg Kurz static void coroutine_fn v9fs_fs_ro(void *opaque) 349560ce86c7SWei Liu { 349660ce86c7SWei Liu V9fsPDU *pdu = opaque; 349760ce86c7SWei Liu pdu_complete(pdu, -EROFS); 349860ce86c7SWei Liu } 349960ce86c7SWei Liu 350060ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 350160ce86c7SWei Liu { 350260ce86c7SWei Liu switch (pdu->id) { 350360ce86c7SWei Liu case P9_TREADDIR: 350460ce86c7SWei Liu case P9_TSTATFS: 350560ce86c7SWei Liu case P9_TGETATTR: 350660ce86c7SWei Liu case P9_TXATTRWALK: 350760ce86c7SWei Liu case P9_TLOCK: 350860ce86c7SWei Liu case P9_TGETLOCK: 350960ce86c7SWei Liu case P9_TREADLINK: 351060ce86c7SWei Liu case P9_TVERSION: 351160ce86c7SWei Liu case P9_TLOPEN: 351260ce86c7SWei Liu case P9_TATTACH: 351360ce86c7SWei Liu case P9_TSTAT: 351460ce86c7SWei Liu case P9_TWALK: 351560ce86c7SWei Liu case P9_TCLUNK: 351660ce86c7SWei Liu case P9_TFSYNC: 351760ce86c7SWei Liu case P9_TOPEN: 351860ce86c7SWei Liu case P9_TREAD: 351960ce86c7SWei Liu case P9_TAUTH: 352060ce86c7SWei Liu case P9_TFLUSH: 352160ce86c7SWei Liu return 1; 352260ce86c7SWei Liu default: 352360ce86c7SWei Liu return 0; 352460ce86c7SWei Liu } 352560ce86c7SWei Liu } 352660ce86c7SWei Liu 3527506f3275SGreg Kurz void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr) 352860ce86c7SWei Liu { 352960ce86c7SWei Liu Coroutine *co; 353060ce86c7SWei Liu CoroutineEntry *handler; 353160ce86c7SWei Liu V9fsState *s = pdu->s; 353260ce86c7SWei Liu 3533506f3275SGreg Kurz pdu->size = le32_to_cpu(hdr->size_le); 3534506f3275SGreg Kurz pdu->id = hdr->id; 3535506f3275SGreg Kurz pdu->tag = le16_to_cpu(hdr->tag_le); 3536506f3275SGreg Kurz 353760ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 353860ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 353960ce86c7SWei Liu handler = v9fs_op_not_supp; 3540d1471233SGreg Kurz } else if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 3541d1471233SGreg Kurz handler = v9fs_fs_ro; 354260ce86c7SWei Liu } else { 354360ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 354460ce86c7SWei Liu } 354560ce86c7SWei Liu 3546506f3275SGreg Kurz qemu_co_queue_init(&pdu->complete); 35470b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 35480b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 354960ce86c7SWei Liu } 355060ce86c7SWei Liu 35512a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 3552066eb006SGreg Kurz int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t, 3553066eb006SGreg Kurz Error **errp) 35542a0c56aaSWei Liu { 35552a0c56aaSWei Liu int i, len; 35562a0c56aaSWei Liu struct stat stat; 35572a0c56aaSWei Liu FsDriverEntry *fse; 35582a0c56aaSWei Liu V9fsPath path; 35592a0c56aaSWei Liu int rc = 1; 35602a0c56aaSWei Liu 3561066eb006SGreg Kurz assert(!s->transport); 3562066eb006SGreg Kurz s->transport = t; 3563066eb006SGreg Kurz 35642a0c56aaSWei Liu /* initialize pdu allocator */ 35652a0c56aaSWei Liu QLIST_INIT(&s->free_list); 35662a0c56aaSWei Liu QLIST_INIT(&s->active_list); 35670d78289cSGreg Kurz for (i = 0; i < MAX_REQ; i++) { 3568583f21f8SStefano Stabellini QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 3569583f21f8SStefano Stabellini s->pdus[i].s = s; 3570583f21f8SStefano Stabellini s->pdus[i].idx = i; 35712a0c56aaSWei Liu } 35722a0c56aaSWei Liu 35732a0c56aaSWei Liu v9fs_path_init(&path); 35742a0c56aaSWei Liu 35752a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 35762a0c56aaSWei Liu 35772a0c56aaSWei Liu if (!fse) { 35782a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 35792a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 35802a0c56aaSWei Liu "id = %s", 35812a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 35822a0c56aaSWei Liu goto out; 35832a0c56aaSWei Liu } 35842a0c56aaSWei Liu 35852a0c56aaSWei Liu if (!s->fsconf.tag) { 35862a0c56aaSWei Liu /* we haven't specified a mount_tag */ 35872a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 35882a0c56aaSWei Liu s->fsconf.fsdev_id); 35892a0c56aaSWei Liu goto out; 35902a0c56aaSWei Liu } 35912a0c56aaSWei Liu 35922a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 35932a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 35942a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 35952a0c56aaSWei Liu len = strlen(s->fsconf.tag); 35962a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 35972a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 35982a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 35992a0c56aaSWei Liu goto out; 36002a0c56aaSWei Liu } 36012a0c56aaSWei Liu 36022a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 36032a0c56aaSWei Liu s->ctx.uid = -1; 36042a0c56aaSWei Liu 36052a0c56aaSWei Liu s->ops = fse->ops; 36062a0c56aaSWei Liu 3607b96feb2cSTobias Schramm s->ctx.fmode = fse->fmode; 3608b96feb2cSTobias Schramm s->ctx.dmode = fse->dmode; 3609b96feb2cSTobias Schramm 36102a0c56aaSWei Liu s->fid_list = NULL; 36112a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 36122a0c56aaSWei Liu 361365603a80SGreg Kurz if (s->ops->init(&s->ctx, errp) < 0) { 361465603a80SGreg Kurz error_prepend(errp, "cannot initialize fsdev '%s': ", 361565603a80SGreg Kurz s->fsconf.fsdev_id); 36162a0c56aaSWei Liu goto out; 36172a0c56aaSWei Liu } 36182a0c56aaSWei Liu 36192a0c56aaSWei Liu /* 36202a0c56aaSWei Liu * Check details of export path, We need to use fs driver 36212a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 36222a0c56aaSWei Liu * use co-routines here. 36232a0c56aaSWei Liu */ 36242a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 36252a0c56aaSWei Liu error_setg(errp, 36262a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 36272a0c56aaSWei Liu goto out; 36282a0c56aaSWei Liu } 36292a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 36302a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 36312a0c56aaSWei Liu goto out; 36322a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 36332a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 36342a0c56aaSWei Liu goto out; 36352a0c56aaSWei Liu } 3636b8bbdb88SPradeep Jagadeesh 3637b8bbdb88SPradeep Jagadeesh s->ctx.fst = &fse->fst; 3638b8bbdb88SPradeep Jagadeesh fsdev_throttle_init(s->ctx.fst); 3639b8bbdb88SPradeep Jagadeesh 36402a0c56aaSWei Liu v9fs_path_free(&path); 36412a0c56aaSWei Liu 36422a0c56aaSWei Liu rc = 0; 36432a0c56aaSWei Liu out: 36442a0c56aaSWei Liu if (rc) { 3645f2b58c43SGreg Kurz if (s->ops && s->ops->cleanup && s->ctx.private) { 3646702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3647702dbcc2SLi Qiang } 36482a0c56aaSWei Liu g_free(s->tag); 36494774718eSLi Qiang g_free(s->ctx.fs_root); 36502a0c56aaSWei Liu v9fs_path_free(&path); 36512a0c56aaSWei Liu } 36522a0c56aaSWei Liu return rc; 36532a0c56aaSWei Liu } 36542a0c56aaSWei Liu 36552a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 36562a0c56aaSWei Liu { 3657702dbcc2SLi Qiang if (s->ops->cleanup) { 3658702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3659702dbcc2SLi Qiang } 3660b8bbdb88SPradeep Jagadeesh fsdev_throttle_cleanup(s->ctx.fst); 36612a0c56aaSWei Liu g_free(s->tag); 36624774718eSLi Qiang g_free(s->ctx.fs_root); 36632a0c56aaSWei Liu } 36642a0c56aaSWei Liu 36650e44a0fdSGreg Kurz typedef struct VirtfsCoResetData { 36660e44a0fdSGreg Kurz V9fsPDU pdu; 36670e44a0fdSGreg Kurz bool done; 36680e44a0fdSGreg Kurz } VirtfsCoResetData; 36690e44a0fdSGreg Kurz 36700e44a0fdSGreg Kurz static void coroutine_fn virtfs_co_reset(void *opaque) 36710e44a0fdSGreg Kurz { 36720e44a0fdSGreg Kurz VirtfsCoResetData *data = opaque; 36730e44a0fdSGreg Kurz 36740e44a0fdSGreg Kurz virtfs_reset(&data->pdu); 36750e44a0fdSGreg Kurz data->done = true; 36760e44a0fdSGreg Kurz } 36770e44a0fdSGreg Kurz 36780e44a0fdSGreg Kurz void v9fs_reset(V9fsState *s) 36790e44a0fdSGreg Kurz { 36800e44a0fdSGreg Kurz VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; 36810e44a0fdSGreg Kurz Coroutine *co; 36820e44a0fdSGreg Kurz 36830e44a0fdSGreg Kurz while (!QLIST_EMPTY(&s->active_list)) { 36840e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 36850e44a0fdSGreg Kurz } 36860e44a0fdSGreg Kurz 36870e44a0fdSGreg Kurz co = qemu_coroutine_create(virtfs_co_reset, &data); 36880e44a0fdSGreg Kurz qemu_coroutine_enter(co); 36890e44a0fdSGreg Kurz 36900e44a0fdSGreg Kurz while (!data.done) { 36910e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 36920e44a0fdSGreg Kurz } 36930e44a0fdSGreg Kurz } 36940e44a0fdSGreg Kurz 369560ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 369660ce86c7SWei Liu { 369760ce86c7SWei Liu struct rlimit rlim; 369860ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 369963325b18SGreg Kurz error_report("Failed to get the resource limit"); 370060ce86c7SWei Liu exit(1); 370160ce86c7SWei Liu } 370260ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 370360ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 370460ce86c7SWei Liu } 3705