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" 29*1a6ed33cSAntonios Motakis #include "qemu/xxhash.h" 3060ce86c7SWei Liu 3160ce86c7SWei Liu int open_fd_hw; 3260ce86c7SWei Liu int total_open_fd; 3360ce86c7SWei Liu static int open_fd_rc; 3460ce86c7SWei Liu 3560ce86c7SWei Liu enum { 3660ce86c7SWei Liu Oread = 0x00, 3760ce86c7SWei Liu Owrite = 0x01, 3860ce86c7SWei Liu Ordwr = 0x02, 3960ce86c7SWei Liu Oexec = 0x03, 4060ce86c7SWei Liu Oexcl = 0x04, 4160ce86c7SWei Liu Otrunc = 0x10, 4260ce86c7SWei Liu Orexec = 0x20, 4360ce86c7SWei Liu Orclose = 0x40, 4460ce86c7SWei Liu Oappend = 0x80, 4560ce86c7SWei Liu }; 4660ce86c7SWei Liu 4775673590SGreg Kurz static ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 4860ce86c7SWei Liu { 4960ce86c7SWei Liu ssize_t ret; 5060ce86c7SWei Liu va_list ap; 5160ce86c7SWei Liu 5260ce86c7SWei Liu va_start(ap, fmt); 53ea83441cSStefano Stabellini ret = pdu->s->transport->pdu_vmarshal(pdu, offset, fmt, ap); 5460ce86c7SWei Liu va_end(ap); 5560ce86c7SWei Liu 5660ce86c7SWei Liu return ret; 5760ce86c7SWei Liu } 5860ce86c7SWei Liu 5975673590SGreg Kurz static ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 6060ce86c7SWei Liu { 6160ce86c7SWei Liu ssize_t ret; 6260ce86c7SWei Liu va_list ap; 6360ce86c7SWei Liu 6460ce86c7SWei Liu va_start(ap, fmt); 65ea83441cSStefano Stabellini ret = pdu->s->transport->pdu_vunmarshal(pdu, offset, fmt, ap); 6660ce86c7SWei Liu va_end(ap); 6760ce86c7SWei Liu 6860ce86c7SWei Liu return ret; 6960ce86c7SWei Liu } 7060ce86c7SWei Liu 7160ce86c7SWei Liu static int omode_to_uflags(int8_t mode) 7260ce86c7SWei Liu { 7360ce86c7SWei Liu int ret = 0; 7460ce86c7SWei Liu 7560ce86c7SWei Liu switch (mode & 3) { 7660ce86c7SWei Liu case Oread: 7760ce86c7SWei Liu ret = O_RDONLY; 7860ce86c7SWei Liu break; 7960ce86c7SWei Liu case Ordwr: 8060ce86c7SWei Liu ret = O_RDWR; 8160ce86c7SWei Liu break; 8260ce86c7SWei Liu case Owrite: 8360ce86c7SWei Liu ret = O_WRONLY; 8460ce86c7SWei Liu break; 8560ce86c7SWei Liu case Oexec: 8660ce86c7SWei Liu ret = O_RDONLY; 8760ce86c7SWei Liu break; 8860ce86c7SWei Liu } 8960ce86c7SWei Liu 9060ce86c7SWei Liu if (mode & Otrunc) { 9160ce86c7SWei Liu ret |= O_TRUNC; 9260ce86c7SWei Liu } 9360ce86c7SWei Liu 9460ce86c7SWei Liu if (mode & Oappend) { 9560ce86c7SWei Liu ret |= O_APPEND; 9660ce86c7SWei Liu } 9760ce86c7SWei Liu 9860ce86c7SWei Liu if (mode & Oexcl) { 9960ce86c7SWei Liu ret |= O_EXCL; 10060ce86c7SWei Liu } 10160ce86c7SWei Liu 10260ce86c7SWei Liu return ret; 10360ce86c7SWei Liu } 10460ce86c7SWei Liu 1058e71b96cSGreg Kurz typedef struct DotlOpenflagMap { 10660ce86c7SWei Liu int dotl_flag; 10760ce86c7SWei Liu int open_flag; 1088e71b96cSGreg Kurz } DotlOpenflagMap; 10960ce86c7SWei Liu 11060ce86c7SWei Liu static int dotl_to_open_flags(int flags) 11160ce86c7SWei Liu { 11260ce86c7SWei Liu int i; 11360ce86c7SWei Liu /* 11460ce86c7SWei Liu * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY 11560ce86c7SWei Liu * and P9_DOTL_NOACCESS 11660ce86c7SWei Liu */ 11760ce86c7SWei Liu int oflags = flags & O_ACCMODE; 11860ce86c7SWei Liu 1198e71b96cSGreg Kurz DotlOpenflagMap dotl_oflag_map[] = { 12060ce86c7SWei Liu { P9_DOTL_CREATE, O_CREAT }, 12160ce86c7SWei Liu { P9_DOTL_EXCL, O_EXCL }, 12260ce86c7SWei Liu { P9_DOTL_NOCTTY , O_NOCTTY }, 12360ce86c7SWei Liu { P9_DOTL_TRUNC, O_TRUNC }, 12460ce86c7SWei Liu { P9_DOTL_APPEND, O_APPEND }, 12560ce86c7SWei Liu { P9_DOTL_NONBLOCK, O_NONBLOCK } , 12660ce86c7SWei Liu { P9_DOTL_DSYNC, O_DSYNC }, 12760ce86c7SWei Liu { P9_DOTL_FASYNC, FASYNC }, 12860ce86c7SWei Liu { P9_DOTL_DIRECT, O_DIRECT }, 12960ce86c7SWei Liu { P9_DOTL_LARGEFILE, O_LARGEFILE }, 13060ce86c7SWei Liu { P9_DOTL_DIRECTORY, O_DIRECTORY }, 13160ce86c7SWei Liu { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, 13260ce86c7SWei Liu { P9_DOTL_NOATIME, O_NOATIME }, 13360ce86c7SWei Liu { P9_DOTL_SYNC, O_SYNC }, 13460ce86c7SWei Liu }; 13560ce86c7SWei Liu 13660ce86c7SWei Liu for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { 13760ce86c7SWei Liu if (flags & dotl_oflag_map[i].dotl_flag) { 13860ce86c7SWei Liu oflags |= dotl_oflag_map[i].open_flag; 13960ce86c7SWei Liu } 14060ce86c7SWei Liu } 14160ce86c7SWei Liu 14260ce86c7SWei Liu return oflags; 14360ce86c7SWei Liu } 14460ce86c7SWei Liu 14560ce86c7SWei Liu void cred_init(FsCred *credp) 14660ce86c7SWei Liu { 14760ce86c7SWei Liu credp->fc_uid = -1; 14860ce86c7SWei Liu credp->fc_gid = -1; 14960ce86c7SWei Liu credp->fc_mode = -1; 15060ce86c7SWei Liu credp->fc_rdev = -1; 15160ce86c7SWei Liu } 15260ce86c7SWei Liu 15360ce86c7SWei Liu static int get_dotl_openflags(V9fsState *s, int oflags) 15460ce86c7SWei Liu { 15560ce86c7SWei Liu int flags; 15660ce86c7SWei Liu /* 15760ce86c7SWei Liu * Filter the client open flags 15860ce86c7SWei Liu */ 15960ce86c7SWei Liu flags = dotl_to_open_flags(oflags); 16060ce86c7SWei Liu flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); 16160ce86c7SWei Liu /* 16260ce86c7SWei Liu * Ignore direct disk access hint until the server supports it. 16360ce86c7SWei Liu */ 16460ce86c7SWei Liu flags &= ~O_DIRECT; 16560ce86c7SWei Liu return flags; 16660ce86c7SWei Liu } 16760ce86c7SWei Liu 16860ce86c7SWei Liu void v9fs_path_init(V9fsPath *path) 16960ce86c7SWei Liu { 17060ce86c7SWei Liu path->data = NULL; 17160ce86c7SWei Liu path->size = 0; 17260ce86c7SWei Liu } 17360ce86c7SWei Liu 17460ce86c7SWei Liu void v9fs_path_free(V9fsPath *path) 17560ce86c7SWei Liu { 17660ce86c7SWei Liu g_free(path->data); 17760ce86c7SWei Liu path->data = NULL; 17860ce86c7SWei Liu path->size = 0; 17960ce86c7SWei Liu } 18060ce86c7SWei Liu 181e3e83f2eSGreg Kurz 182e3e83f2eSGreg Kurz void GCC_FMT_ATTR(2, 3) 183e3e83f2eSGreg Kurz v9fs_path_sprintf(V9fsPath *path, const char *fmt, ...) 184e3e83f2eSGreg Kurz { 185e3e83f2eSGreg Kurz va_list ap; 186e3e83f2eSGreg Kurz 187e3e83f2eSGreg Kurz v9fs_path_free(path); 188e3e83f2eSGreg Kurz 189e3e83f2eSGreg Kurz va_start(ap, fmt); 190e3e83f2eSGreg Kurz /* Bump the size for including terminating NULL */ 191e3e83f2eSGreg Kurz path->size = g_vasprintf(&path->data, fmt, ap) + 1; 192e3e83f2eSGreg Kurz va_end(ap); 193e3e83f2eSGreg Kurz } 194e3e83f2eSGreg Kurz 195e446a1ebSMarc-André Lureau void v9fs_path_copy(V9fsPath *dst, const V9fsPath *src) 19660ce86c7SWei Liu { 197e446a1ebSMarc-André Lureau v9fs_path_free(dst); 198e446a1ebSMarc-André Lureau dst->size = src->size; 199e446a1ebSMarc-André Lureau dst->data = g_memdup(src->data, src->size); 20060ce86c7SWei Liu } 20160ce86c7SWei Liu 20260ce86c7SWei Liu int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 20360ce86c7SWei Liu const char *name, V9fsPath *path) 20460ce86c7SWei Liu { 20560ce86c7SWei Liu int err; 20660ce86c7SWei Liu err = s->ops->name_to_path(&s->ctx, dirpath, name, path); 20760ce86c7SWei Liu if (err < 0) { 20860ce86c7SWei Liu err = -errno; 20960ce86c7SWei Liu } 21060ce86c7SWei Liu return err; 21160ce86c7SWei Liu } 21260ce86c7SWei Liu 21360ce86c7SWei Liu /* 21460ce86c7SWei Liu * Return TRUE if s1 is an ancestor of s2. 21560ce86c7SWei Liu * 21660ce86c7SWei Liu * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". 21760ce86c7SWei Liu * As a special case, We treat s1 as ancestor of s2 if they are same! 21860ce86c7SWei Liu */ 21960ce86c7SWei Liu static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) 22060ce86c7SWei Liu { 22160ce86c7SWei Liu if (!strncmp(s1->data, s2->data, s1->size - 1)) { 22260ce86c7SWei Liu if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { 22360ce86c7SWei Liu return 1; 22460ce86c7SWei Liu } 22560ce86c7SWei Liu } 22660ce86c7SWei Liu return 0; 22760ce86c7SWei Liu } 22860ce86c7SWei Liu 22960ce86c7SWei Liu static size_t v9fs_string_size(V9fsString *str) 23060ce86c7SWei Liu { 23160ce86c7SWei Liu return str->size; 23260ce86c7SWei Liu } 23360ce86c7SWei Liu 23460ce86c7SWei Liu /* 23560ce86c7SWei Liu * returns 0 if fid got re-opened, 1 if not, < 0 on error */ 2368440e22eSGreg Kurz static int coroutine_fn v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) 23760ce86c7SWei Liu { 23860ce86c7SWei Liu int err = 1; 23960ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 24060ce86c7SWei Liu if (f->fs.fd == -1) { 24160ce86c7SWei Liu do { 24260ce86c7SWei Liu err = v9fs_co_open(pdu, f, f->open_flags); 24360ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 24460ce86c7SWei Liu } 24560ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 246f314ea4eSGreg Kurz if (f->fs.dir.stream == NULL) { 24760ce86c7SWei Liu do { 24860ce86c7SWei Liu err = v9fs_co_opendir(pdu, f); 24960ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 25060ce86c7SWei Liu } 25160ce86c7SWei Liu } 25260ce86c7SWei Liu return err; 25360ce86c7SWei Liu } 25460ce86c7SWei Liu 2558440e22eSGreg Kurz static V9fsFidState *coroutine_fn get_fid(V9fsPDU *pdu, int32_t fid) 25660ce86c7SWei Liu { 25760ce86c7SWei Liu int err; 25860ce86c7SWei Liu V9fsFidState *f; 25960ce86c7SWei Liu V9fsState *s = pdu->s; 26060ce86c7SWei Liu 26160ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 26260ce86c7SWei Liu BUG_ON(f->clunked); 26360ce86c7SWei Liu if (f->fid == fid) { 26460ce86c7SWei Liu /* 26560ce86c7SWei Liu * Update the fid ref upfront so that 26660ce86c7SWei Liu * we don't get reclaimed when we yield 26760ce86c7SWei Liu * in open later. 26860ce86c7SWei Liu */ 26960ce86c7SWei Liu f->ref++; 27060ce86c7SWei Liu /* 27160ce86c7SWei Liu * check whether we need to reopen the 27260ce86c7SWei Liu * file. We might have closed the fd 27360ce86c7SWei Liu * while trying to free up some file 27460ce86c7SWei Liu * descriptors. 27560ce86c7SWei Liu */ 27660ce86c7SWei Liu err = v9fs_reopen_fid(pdu, f); 27760ce86c7SWei Liu if (err < 0) { 27860ce86c7SWei Liu f->ref--; 27960ce86c7SWei Liu return NULL; 28060ce86c7SWei Liu } 28160ce86c7SWei Liu /* 28260ce86c7SWei Liu * Mark the fid as referenced so that the LRU 28360ce86c7SWei Liu * reclaim won't close the file descriptor 28460ce86c7SWei Liu */ 28560ce86c7SWei Liu f->flags |= FID_REFERENCED; 28660ce86c7SWei Liu return f; 28760ce86c7SWei Liu } 28860ce86c7SWei Liu } 28960ce86c7SWei Liu return NULL; 29060ce86c7SWei Liu } 29160ce86c7SWei Liu 29260ce86c7SWei Liu static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) 29360ce86c7SWei Liu { 29460ce86c7SWei Liu V9fsFidState *f; 29560ce86c7SWei Liu 29660ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 29760ce86c7SWei Liu /* If fid is already there return NULL */ 29860ce86c7SWei Liu BUG_ON(f->clunked); 29960ce86c7SWei Liu if (f->fid == fid) { 30060ce86c7SWei Liu return NULL; 30160ce86c7SWei Liu } 30260ce86c7SWei Liu } 30360ce86c7SWei Liu f = g_malloc0(sizeof(V9fsFidState)); 30460ce86c7SWei Liu f->fid = fid; 30560ce86c7SWei Liu f->fid_type = P9_FID_NONE; 30660ce86c7SWei Liu f->ref = 1; 30760ce86c7SWei Liu /* 30860ce86c7SWei Liu * Mark the fid as referenced so that the LRU 30960ce86c7SWei Liu * reclaim won't close the file descriptor 31060ce86c7SWei Liu */ 31160ce86c7SWei Liu f->flags |= FID_REFERENCED; 31260ce86c7SWei Liu f->next = s->fid_list; 31360ce86c7SWei Liu s->fid_list = f; 31460ce86c7SWei Liu 3157cde47d4SGreg Kurz v9fs_readdir_init(&f->fs.dir); 3167cde47d4SGreg Kurz v9fs_readdir_init(&f->fs_reclaim.dir); 3177cde47d4SGreg Kurz 31860ce86c7SWei Liu return f; 31960ce86c7SWei Liu } 32060ce86c7SWei Liu 3218440e22eSGreg Kurz static int coroutine_fn v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) 32260ce86c7SWei Liu { 32360ce86c7SWei Liu int retval = 0; 32460ce86c7SWei Liu 325dd28fbbcSLi Qiang if (fidp->fs.xattr.xattrwalk_fid) { 32660ce86c7SWei Liu /* getxattr/listxattr fid */ 32760ce86c7SWei Liu goto free_value; 32860ce86c7SWei Liu } 32960ce86c7SWei Liu /* 33060ce86c7SWei Liu * if this is fid for setxattr. clunk should 33160ce86c7SWei Liu * result in setxattr localcall 33260ce86c7SWei Liu */ 33360ce86c7SWei Liu if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { 33460ce86c7SWei Liu /* clunk after partial write */ 33560ce86c7SWei Liu retval = -EINVAL; 33660ce86c7SWei Liu goto free_out; 33760ce86c7SWei Liu } 33860ce86c7SWei Liu if (fidp->fs.xattr.len) { 33960ce86c7SWei Liu retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, 34060ce86c7SWei Liu fidp->fs.xattr.value, 34160ce86c7SWei Liu fidp->fs.xattr.len, 34260ce86c7SWei Liu fidp->fs.xattr.flags); 34360ce86c7SWei Liu } else { 34460ce86c7SWei Liu retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); 34560ce86c7SWei Liu } 34660ce86c7SWei Liu free_out: 34760ce86c7SWei Liu v9fs_string_free(&fidp->fs.xattr.name); 34860ce86c7SWei Liu free_value: 34960ce86c7SWei Liu g_free(fidp->fs.xattr.value); 35060ce86c7SWei Liu return retval; 35160ce86c7SWei Liu } 35260ce86c7SWei Liu 3538440e22eSGreg Kurz static int coroutine_fn free_fid(V9fsPDU *pdu, V9fsFidState *fidp) 35460ce86c7SWei Liu { 35560ce86c7SWei Liu int retval = 0; 35660ce86c7SWei Liu 35760ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 35860ce86c7SWei Liu /* If we reclaimed the fd no need to close */ 35960ce86c7SWei Liu if (fidp->fs.fd != -1) { 36060ce86c7SWei Liu retval = v9fs_co_close(pdu, &fidp->fs); 36160ce86c7SWei Liu } 36260ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_DIR) { 363f314ea4eSGreg Kurz if (fidp->fs.dir.stream != NULL) { 36460ce86c7SWei Liu retval = v9fs_co_closedir(pdu, &fidp->fs); 36560ce86c7SWei Liu } 36660ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 36760ce86c7SWei Liu retval = v9fs_xattr_fid_clunk(pdu, fidp); 36860ce86c7SWei Liu } 36960ce86c7SWei Liu v9fs_path_free(&fidp->path); 37060ce86c7SWei Liu g_free(fidp); 37160ce86c7SWei Liu return retval; 37260ce86c7SWei Liu } 37360ce86c7SWei Liu 3748440e22eSGreg Kurz static int coroutine_fn put_fid(V9fsPDU *pdu, V9fsFidState *fidp) 37560ce86c7SWei Liu { 37660ce86c7SWei Liu BUG_ON(!fidp->ref); 37760ce86c7SWei Liu fidp->ref--; 37860ce86c7SWei Liu /* 37960ce86c7SWei Liu * Don't free the fid if it is in reclaim list 38060ce86c7SWei Liu */ 38160ce86c7SWei Liu if (!fidp->ref && fidp->clunked) { 38260ce86c7SWei Liu if (fidp->fid == pdu->s->root_fid) { 38360ce86c7SWei Liu /* 38460ce86c7SWei Liu * if the clunked fid is root fid then we 38560ce86c7SWei Liu * have unmounted the fs on the client side. 38660ce86c7SWei Liu * delete the migration blocker. Ideally, this 38760ce86c7SWei Liu * should be hooked to transport close notification 38860ce86c7SWei Liu */ 38960ce86c7SWei Liu if (pdu->s->migration_blocker) { 39060ce86c7SWei Liu migrate_del_blocker(pdu->s->migration_blocker); 39160ce86c7SWei Liu error_free(pdu->s->migration_blocker); 39260ce86c7SWei Liu pdu->s->migration_blocker = NULL; 39360ce86c7SWei Liu } 39460ce86c7SWei Liu } 39560ce86c7SWei Liu return free_fid(pdu, fidp); 39660ce86c7SWei Liu } 39760ce86c7SWei Liu return 0; 39860ce86c7SWei Liu } 39960ce86c7SWei Liu 40060ce86c7SWei Liu static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) 40160ce86c7SWei Liu { 40260ce86c7SWei Liu V9fsFidState **fidpp, *fidp; 40360ce86c7SWei Liu 40460ce86c7SWei Liu for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { 40560ce86c7SWei Liu if ((*fidpp)->fid == fid) { 40660ce86c7SWei Liu break; 40760ce86c7SWei Liu } 40860ce86c7SWei Liu } 40960ce86c7SWei Liu if (*fidpp == NULL) { 41060ce86c7SWei Liu return NULL; 41160ce86c7SWei Liu } 41260ce86c7SWei Liu fidp = *fidpp; 41360ce86c7SWei Liu *fidpp = fidp->next; 41460ce86c7SWei Liu fidp->clunked = 1; 41560ce86c7SWei Liu return fidp; 41660ce86c7SWei Liu } 41760ce86c7SWei Liu 4188440e22eSGreg Kurz void coroutine_fn v9fs_reclaim_fd(V9fsPDU *pdu) 41960ce86c7SWei Liu { 42060ce86c7SWei Liu int reclaim_count = 0; 42160ce86c7SWei Liu V9fsState *s = pdu->s; 42260ce86c7SWei Liu V9fsFidState *f, *reclaim_list = NULL; 42360ce86c7SWei Liu 42460ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 42560ce86c7SWei Liu /* 42660ce86c7SWei Liu * Unlink fids cannot be reclaimed. Check 42760ce86c7SWei Liu * for them and skip them. Also skip fids 42860ce86c7SWei Liu * currently being operated on. 42960ce86c7SWei Liu */ 43060ce86c7SWei Liu if (f->ref || f->flags & FID_NON_RECLAIMABLE) { 43160ce86c7SWei Liu continue; 43260ce86c7SWei Liu } 43360ce86c7SWei Liu /* 43460ce86c7SWei Liu * if it is a recently referenced fid 43560ce86c7SWei Liu * we leave the fid untouched and clear the 43660ce86c7SWei Liu * reference bit. We come back to it later 43760ce86c7SWei Liu * in the next iteration. (a simple LRU without 43860ce86c7SWei Liu * moving list elements around) 43960ce86c7SWei Liu */ 44060ce86c7SWei Liu if (f->flags & FID_REFERENCED) { 44160ce86c7SWei Liu f->flags &= ~FID_REFERENCED; 44260ce86c7SWei Liu continue; 44360ce86c7SWei Liu } 44460ce86c7SWei Liu /* 44560ce86c7SWei Liu * Add fids to reclaim list. 44660ce86c7SWei Liu */ 44760ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 44860ce86c7SWei Liu if (f->fs.fd != -1) { 44960ce86c7SWei Liu /* 45060ce86c7SWei Liu * Up the reference count so that 45160ce86c7SWei Liu * a clunk request won't free this fid 45260ce86c7SWei Liu */ 45360ce86c7SWei Liu f->ref++; 45460ce86c7SWei Liu f->rclm_lst = reclaim_list; 45560ce86c7SWei Liu reclaim_list = f; 45660ce86c7SWei Liu f->fs_reclaim.fd = f->fs.fd; 45760ce86c7SWei Liu f->fs.fd = -1; 45860ce86c7SWei Liu reclaim_count++; 45960ce86c7SWei Liu } 46060ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 461f314ea4eSGreg Kurz if (f->fs.dir.stream != NULL) { 46260ce86c7SWei Liu /* 46360ce86c7SWei Liu * Up the reference count so that 46460ce86c7SWei Liu * a clunk request won't free this fid 46560ce86c7SWei Liu */ 46660ce86c7SWei Liu f->ref++; 46760ce86c7SWei Liu f->rclm_lst = reclaim_list; 46860ce86c7SWei Liu reclaim_list = f; 469f314ea4eSGreg Kurz f->fs_reclaim.dir.stream = f->fs.dir.stream; 470f314ea4eSGreg Kurz f->fs.dir.stream = NULL; 47160ce86c7SWei Liu reclaim_count++; 47260ce86c7SWei Liu } 47360ce86c7SWei Liu } 47460ce86c7SWei Liu if (reclaim_count >= open_fd_rc) { 47560ce86c7SWei Liu break; 47660ce86c7SWei Liu } 47760ce86c7SWei Liu } 47860ce86c7SWei Liu /* 47960ce86c7SWei Liu * Now close the fid in reclaim list. Free them if they 48060ce86c7SWei Liu * are already clunked. 48160ce86c7SWei Liu */ 48260ce86c7SWei Liu while (reclaim_list) { 48360ce86c7SWei Liu f = reclaim_list; 48460ce86c7SWei Liu reclaim_list = f->rclm_lst; 48560ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 48660ce86c7SWei Liu v9fs_co_close(pdu, &f->fs_reclaim); 48760ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 48860ce86c7SWei Liu v9fs_co_closedir(pdu, &f->fs_reclaim); 48960ce86c7SWei Liu } 49060ce86c7SWei Liu f->rclm_lst = NULL; 49160ce86c7SWei Liu /* 49260ce86c7SWei Liu * Now drop the fid reference, free it 49360ce86c7SWei Liu * if clunked. 49460ce86c7SWei Liu */ 49560ce86c7SWei Liu put_fid(pdu, f); 49660ce86c7SWei Liu } 49760ce86c7SWei Liu } 49860ce86c7SWei Liu 4998440e22eSGreg Kurz static int coroutine_fn v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) 50060ce86c7SWei Liu { 50160ce86c7SWei Liu int err; 50260ce86c7SWei Liu V9fsState *s = pdu->s; 50360ce86c7SWei Liu V9fsFidState *fidp, head_fid; 50460ce86c7SWei Liu 50560ce86c7SWei Liu head_fid.next = s->fid_list; 50660ce86c7SWei Liu for (fidp = s->fid_list; fidp; fidp = fidp->next) { 50760ce86c7SWei Liu if (fidp->path.size != path->size) { 50860ce86c7SWei Liu continue; 50960ce86c7SWei Liu } 51060ce86c7SWei Liu if (!memcmp(fidp->path.data, path->data, path->size)) { 51160ce86c7SWei Liu /* Mark the fid non reclaimable. */ 51260ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 51360ce86c7SWei Liu 51460ce86c7SWei Liu /* reopen the file/dir if already closed */ 51560ce86c7SWei Liu err = v9fs_reopen_fid(pdu, fidp); 51660ce86c7SWei Liu if (err < 0) { 517267fcadfSGreg Kurz return err; 51860ce86c7SWei Liu } 51960ce86c7SWei Liu /* 52060ce86c7SWei Liu * Go back to head of fid list because 52160ce86c7SWei Liu * the list could have got updated when 52260ce86c7SWei Liu * switched to the worker thread 52360ce86c7SWei Liu */ 52460ce86c7SWei Liu if (err == 0) { 52560ce86c7SWei Liu fidp = &head_fid; 52660ce86c7SWei Liu } 52760ce86c7SWei Liu } 52860ce86c7SWei Liu } 52960ce86c7SWei Liu return 0; 53060ce86c7SWei Liu } 53160ce86c7SWei Liu 5328440e22eSGreg Kurz static void coroutine_fn virtfs_reset(V9fsPDU *pdu) 53360ce86c7SWei Liu { 53460ce86c7SWei Liu V9fsState *s = pdu->s; 53579decce3SGreg Kurz V9fsFidState *fidp; 53660ce86c7SWei Liu 53760ce86c7SWei Liu /* Free all fids */ 53860ce86c7SWei Liu while (s->fid_list) { 5396d54af0eSGreg Kurz /* Get fid */ 54060ce86c7SWei Liu fidp = s->fid_list; 5416d54af0eSGreg Kurz fidp->ref++; 54260ce86c7SWei Liu 5436d54af0eSGreg Kurz /* Clunk fid */ 5446d54af0eSGreg Kurz s->fid_list = fidp->next; 54560ce86c7SWei Liu fidp->clunked = 1; 5466d54af0eSGreg Kurz 5476d54af0eSGreg Kurz put_fid(pdu, fidp); 54860ce86c7SWei Liu } 54960ce86c7SWei Liu } 55060ce86c7SWei Liu 55160ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 55260ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 55360ce86c7SWei Liu 55460ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 55560ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 55660ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 55760ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 55860ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 55960ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 56060ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 56160ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 56260ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 56360ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 56460ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 56560ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 56660ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 56760ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 56860ce86c7SWei Liu 56960ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 57060ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 57160ce86c7SWei Liu P9_STAT_MODE_LINK | \ 57260ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 57360ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 57460ce86c7SWei Liu P9_STAT_MODE_SOCKET) 57560ce86c7SWei Liu 576*1a6ed33cSAntonios Motakis /* creative abuse of tb_hash_func7, which is based on xxhash */ 577*1a6ed33cSAntonios Motakis static uint32_t qpp_hash(QppEntry e) 578*1a6ed33cSAntonios Motakis { 579*1a6ed33cSAntonios Motakis return qemu_xxhash7(e.ino_prefix, e.dev, 0, 0, 0); 580*1a6ed33cSAntonios Motakis } 581*1a6ed33cSAntonios Motakis 582*1a6ed33cSAntonios Motakis static bool qpp_lookup_func(const void *obj, const void *userp) 583*1a6ed33cSAntonios Motakis { 584*1a6ed33cSAntonios Motakis const QppEntry *e1 = obj, *e2 = userp; 585*1a6ed33cSAntonios Motakis return e1->dev == e2->dev && e1->ino_prefix == e2->ino_prefix; 586*1a6ed33cSAntonios Motakis } 587*1a6ed33cSAntonios Motakis 588*1a6ed33cSAntonios Motakis static void qpp_table_remove(void *p, uint32_t h, void *up) 589*1a6ed33cSAntonios Motakis { 590*1a6ed33cSAntonios Motakis g_free(p); 591*1a6ed33cSAntonios Motakis } 592*1a6ed33cSAntonios Motakis 593*1a6ed33cSAntonios Motakis static void qpp_table_destroy(struct qht *ht) 594*1a6ed33cSAntonios Motakis { 595*1a6ed33cSAntonios Motakis if (!ht || !ht->map) { 596*1a6ed33cSAntonios Motakis return; 597*1a6ed33cSAntonios Motakis } 598*1a6ed33cSAntonios Motakis qht_iter(ht, qpp_table_remove, NULL); 599*1a6ed33cSAntonios Motakis qht_destroy(ht); 600*1a6ed33cSAntonios Motakis } 601*1a6ed33cSAntonios Motakis 602*1a6ed33cSAntonios Motakis static void qpp_table_init(struct qht *ht) 603*1a6ed33cSAntonios Motakis { 604*1a6ed33cSAntonios Motakis qht_init(ht, qpp_lookup_func, 1, QHT_MODE_AUTO_RESIZE); 605*1a6ed33cSAntonios Motakis } 606*1a6ed33cSAntonios Motakis 607*1a6ed33cSAntonios Motakis /* 608*1a6ed33cSAntonios Motakis * stat_to_qid needs to map inode number (64 bits) and device id (32 bits) 609*1a6ed33cSAntonios Motakis * to a unique QID path (64 bits). To avoid having to map and keep track 610*1a6ed33cSAntonios Motakis * of up to 2^64 objects, we map only the 16 highest bits of the inode plus 611*1a6ed33cSAntonios Motakis * the device id to the 16 highest bits of the QID path. The 48 lowest bits 612*1a6ed33cSAntonios Motakis * of the QID path equal to the lowest bits of the inode number. 613*1a6ed33cSAntonios Motakis * 614*1a6ed33cSAntonios Motakis * This takes advantage of the fact that inode number are usually not 615*1a6ed33cSAntonios Motakis * random but allocated sequentially, so we have fewer items to keep 616*1a6ed33cSAntonios Motakis * track of. 617*1a6ed33cSAntonios Motakis */ 618*1a6ed33cSAntonios Motakis static int qid_path_prefixmap(V9fsPDU *pdu, const struct stat *stbuf, 619*1a6ed33cSAntonios Motakis uint64_t *path) 620*1a6ed33cSAntonios Motakis { 621*1a6ed33cSAntonios Motakis QppEntry lookup = { 622*1a6ed33cSAntonios Motakis .dev = stbuf->st_dev, 623*1a6ed33cSAntonios Motakis .ino_prefix = (uint16_t) (stbuf->st_ino >> 48) 624*1a6ed33cSAntonios Motakis }, *val; 625*1a6ed33cSAntonios Motakis uint32_t hash = qpp_hash(lookup); 626*1a6ed33cSAntonios Motakis 627*1a6ed33cSAntonios Motakis val = qht_lookup(&pdu->s->qpp_table, &lookup, hash); 628*1a6ed33cSAntonios Motakis 629*1a6ed33cSAntonios Motakis if (!val) { 630*1a6ed33cSAntonios Motakis if (pdu->s->qp_prefix_next == 0) { 631*1a6ed33cSAntonios Motakis /* we ran out of prefixes */ 632*1a6ed33cSAntonios Motakis error_report_once( 633*1a6ed33cSAntonios Motakis "9p: No more prefixes available for remapping inodes from " 634*1a6ed33cSAntonios Motakis "host to guest." 635*1a6ed33cSAntonios Motakis ); 636*1a6ed33cSAntonios Motakis return -ENFILE; 637*1a6ed33cSAntonios Motakis } 638*1a6ed33cSAntonios Motakis 639*1a6ed33cSAntonios Motakis val = g_malloc0(sizeof(QppEntry)); 640*1a6ed33cSAntonios Motakis *val = lookup; 641*1a6ed33cSAntonios Motakis 642*1a6ed33cSAntonios Motakis /* new unique inode prefix and device combo */ 643*1a6ed33cSAntonios Motakis val->qp_prefix = pdu->s->qp_prefix_next++; 644*1a6ed33cSAntonios Motakis qht_insert(&pdu->s->qpp_table, val, hash, NULL); 645*1a6ed33cSAntonios Motakis } 646*1a6ed33cSAntonios Motakis 647*1a6ed33cSAntonios Motakis *path = ((uint64_t)val->qp_prefix << 48) | (stbuf->st_ino & QPATH_INO_MASK); 648*1a6ed33cSAntonios Motakis return 0; 649*1a6ed33cSAntonios Motakis } 650*1a6ed33cSAntonios Motakis 6513b5ee9e8SAntonios Motakis static int stat_to_qid(V9fsPDU *pdu, const struct stat *stbuf, V9fsQID *qidp) 65260ce86c7SWei Liu { 653*1a6ed33cSAntonios Motakis int err; 65460ce86c7SWei Liu size_t size; 65560ce86c7SWei Liu 656*1a6ed33cSAntonios Motakis if (pdu->s->ctx.export_flags & V9FS_REMAP_INODES) { 657*1a6ed33cSAntonios Motakis /* map inode+device to qid path (fast path) */ 658*1a6ed33cSAntonios Motakis err = qid_path_prefixmap(pdu, stbuf, &qidp->path); 659*1a6ed33cSAntonios Motakis if (err) { 660*1a6ed33cSAntonios Motakis return err; 661*1a6ed33cSAntonios Motakis } 662*1a6ed33cSAntonios Motakis } else { 6633b5ee9e8SAntonios Motakis if (pdu->s->dev_id != stbuf->st_dev) { 664*1a6ed33cSAntonios Motakis if (pdu->s->ctx.export_flags & V9FS_FORBID_MULTIDEVS) { 665*1a6ed33cSAntonios Motakis error_report_once( 666*1a6ed33cSAntonios Motakis "9p: Multiple devices detected in same VirtFS export. " 667*1a6ed33cSAntonios Motakis "Access of guest to additional devices is (partly) " 668*1a6ed33cSAntonios Motakis "denied due to virtfs option 'multidevs=forbid' being " 669*1a6ed33cSAntonios Motakis "effective." 670*1a6ed33cSAntonios Motakis ); 671*1a6ed33cSAntonios Motakis return -ENODEV; 672*1a6ed33cSAntonios Motakis } else { 6733b5ee9e8SAntonios Motakis warn_report_once( 6743b5ee9e8SAntonios Motakis "9p: Multiple devices detected in same VirtFS export, " 6753b5ee9e8SAntonios Motakis "which might lead to file ID collisions and severe " 676*1a6ed33cSAntonios Motakis "misbehaviours on guest! You should either use a " 677*1a6ed33cSAntonios Motakis "separate export for each device shared from host or " 678*1a6ed33cSAntonios Motakis "use virtfs option 'multidevs=remap'!" 6793b5ee9e8SAntonios Motakis ); 6803b5ee9e8SAntonios Motakis } 681*1a6ed33cSAntonios Motakis } 68260ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 68360ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 68460ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 685*1a6ed33cSAntonios Motakis } 686*1a6ed33cSAntonios Motakis 68760ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 68860ce86c7SWei Liu qidp->type = 0; 68960ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 69060ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 69160ce86c7SWei Liu } 69260ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 69360ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 69460ce86c7SWei Liu } 6953b5ee9e8SAntonios Motakis 6963b5ee9e8SAntonios Motakis return 0; 69760ce86c7SWei Liu } 69860ce86c7SWei Liu 6998440e22eSGreg Kurz static int coroutine_fn fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 7008440e22eSGreg Kurz V9fsQID *qidp) 70160ce86c7SWei Liu { 70260ce86c7SWei Liu struct stat stbuf; 70360ce86c7SWei Liu int err; 70460ce86c7SWei Liu 70560ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 70660ce86c7SWei Liu if (err < 0) { 70760ce86c7SWei Liu return err; 70860ce86c7SWei Liu } 7093b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, qidp); 7103b5ee9e8SAntonios Motakis if (err < 0) { 7113b5ee9e8SAntonios Motakis return err; 7123b5ee9e8SAntonios Motakis } 71360ce86c7SWei Liu return 0; 71460ce86c7SWei Liu } 71560ce86c7SWei Liu 716*1a6ed33cSAntonios Motakis static int coroutine_fn dirent_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, 717*1a6ed33cSAntonios Motakis struct dirent *dent, V9fsQID *qidp) 718*1a6ed33cSAntonios Motakis { 719*1a6ed33cSAntonios Motakis struct stat stbuf; 720*1a6ed33cSAntonios Motakis V9fsPath path; 721*1a6ed33cSAntonios Motakis int err; 722*1a6ed33cSAntonios Motakis 723*1a6ed33cSAntonios Motakis v9fs_path_init(&path); 724*1a6ed33cSAntonios Motakis 725*1a6ed33cSAntonios Motakis err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 726*1a6ed33cSAntonios Motakis if (err < 0) { 727*1a6ed33cSAntonios Motakis goto out; 728*1a6ed33cSAntonios Motakis } 729*1a6ed33cSAntonios Motakis err = v9fs_co_lstat(pdu, &path, &stbuf); 730*1a6ed33cSAntonios Motakis if (err < 0) { 731*1a6ed33cSAntonios Motakis goto out; 732*1a6ed33cSAntonios Motakis } 733*1a6ed33cSAntonios Motakis err = stat_to_qid(pdu, &stbuf, qidp); 734*1a6ed33cSAntonios Motakis 735*1a6ed33cSAntonios Motakis out: 736*1a6ed33cSAntonios Motakis v9fs_path_free(&path); 737*1a6ed33cSAntonios Motakis return err; 738*1a6ed33cSAntonios Motakis } 739*1a6ed33cSAntonios Motakis 74060ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 74160ce86c7SWei Liu { 74260ce86c7SWei Liu V9fsPDU *pdu = NULL; 74360ce86c7SWei Liu 74460ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 74560ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 74660ce86c7SWei Liu QLIST_REMOVE(pdu, next); 74760ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 74860ce86c7SWei Liu } 74960ce86c7SWei Liu return pdu; 75060ce86c7SWei Liu } 75160ce86c7SWei Liu 75260ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 75360ce86c7SWei Liu { 75460ce86c7SWei Liu V9fsState *s = pdu->s; 755f74e27bfSGreg Kurz 756f74e27bfSGreg Kurz g_assert(!pdu->cancelled); 75760ce86c7SWei Liu QLIST_REMOVE(pdu, next); 75860ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 75960ce86c7SWei Liu } 76060ce86c7SWei Liu 7618440e22eSGreg Kurz static void coroutine_fn pdu_complete(V9fsPDU *pdu, ssize_t len) 76260ce86c7SWei Liu { 76360ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 76460ce86c7SWei Liu V9fsState *s = pdu->s; 76506a37db7SGreg Kurz int ret; 76660ce86c7SWei Liu 767fc78d5eeSKeno Fischer /* 768fc78d5eeSKeno Fischer * The 9p spec requires that successfully cancelled pdus receive no reply. 769fc78d5eeSKeno Fischer * Sending a reply would confuse clients because they would 770fc78d5eeSKeno Fischer * assume that any EINTR is the actual result of the operation, 771fc78d5eeSKeno Fischer * rather than a consequence of the cancellation. However, if 772fc78d5eeSKeno Fischer * the operation completed (succesfully or with an error other 773fc78d5eeSKeno Fischer * than caused be cancellation), we do send out that reply, both 774fc78d5eeSKeno Fischer * for efficiency and to avoid confusing the rest of the state machine 775fc78d5eeSKeno Fischer * that assumes passing a non-error here will mean a successful 776fc78d5eeSKeno Fischer * transmission of the reply. 777fc78d5eeSKeno Fischer */ 778fc78d5eeSKeno Fischer bool discard = pdu->cancelled && len == -EINTR; 779fc78d5eeSKeno Fischer if (discard) { 780fc78d5eeSKeno Fischer trace_v9fs_rcancel(pdu->tag, pdu->id); 781fc78d5eeSKeno Fischer pdu->size = 0; 782fc78d5eeSKeno Fischer goto out_notify; 783fc78d5eeSKeno Fischer } 784fc78d5eeSKeno Fischer 78560ce86c7SWei Liu if (len < 0) { 78660ce86c7SWei Liu int err = -len; 78760ce86c7SWei Liu len = 7; 78860ce86c7SWei Liu 78960ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 79060ce86c7SWei Liu V9fsString str; 79160ce86c7SWei Liu 79260ce86c7SWei Liu str.data = strerror(err); 79360ce86c7SWei Liu str.size = strlen(str.data); 79460ce86c7SWei Liu 79506a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "s", &str); 79606a37db7SGreg Kurz if (ret < 0) { 79706a37db7SGreg Kurz goto out_notify; 79806a37db7SGreg Kurz } 79906a37db7SGreg Kurz len += ret; 80060ce86c7SWei Liu id = P9_RERROR; 80160ce86c7SWei Liu } 80260ce86c7SWei Liu 80306a37db7SGreg Kurz ret = pdu_marshal(pdu, len, "d", err); 80406a37db7SGreg Kurz if (ret < 0) { 80506a37db7SGreg Kurz goto out_notify; 80606a37db7SGreg Kurz } 80706a37db7SGreg Kurz len += ret; 80860ce86c7SWei Liu 80960ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 81060ce86c7SWei Liu id = P9_RLERROR; 81160ce86c7SWei Liu } 81260ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 81360ce86c7SWei Liu } 81460ce86c7SWei Liu 81560ce86c7SWei Liu /* fill out the header */ 81606a37db7SGreg Kurz if (pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag) < 0) { 81706a37db7SGreg Kurz goto out_notify; 81806a37db7SGreg Kurz } 81960ce86c7SWei Liu 82060ce86c7SWei Liu /* keep these in sync */ 82160ce86c7SWei Liu pdu->size = len; 82260ce86c7SWei Liu pdu->id = id; 82360ce86c7SWei Liu 82406a37db7SGreg Kurz out_notify: 825a17d8659SGreg Kurz pdu->s->transport->push_and_notify(pdu); 82660ce86c7SWei Liu 82760ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 828f74e27bfSGreg Kurz if (!qemu_co_queue_next(&pdu->complete)) { 82960ce86c7SWei Liu pdu_free(pdu); 83060ce86c7SWei Liu } 831f74e27bfSGreg Kurz } 83260ce86c7SWei Liu 83360ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 83460ce86c7SWei Liu { 83560ce86c7SWei Liu mode_t ret; 83660ce86c7SWei Liu 83760ce86c7SWei Liu ret = mode & 0777; 83860ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 83960ce86c7SWei Liu ret |= S_IFDIR; 84060ce86c7SWei Liu } 84160ce86c7SWei Liu 84260ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 84360ce86c7SWei Liu ret |= S_IFLNK; 84460ce86c7SWei Liu } 84560ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 84660ce86c7SWei Liu ret |= S_IFSOCK; 84760ce86c7SWei Liu } 84860ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 84960ce86c7SWei Liu ret |= S_IFIFO; 85060ce86c7SWei Liu } 85160ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 85260ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 85360ce86c7SWei Liu ret |= S_IFCHR; 85460ce86c7SWei Liu } else { 85560ce86c7SWei Liu ret |= S_IFBLK; 85660ce86c7SWei Liu } 85760ce86c7SWei Liu } 85860ce86c7SWei Liu 85960ce86c7SWei Liu if (!(ret&~0777)) { 86060ce86c7SWei Liu ret |= S_IFREG; 86160ce86c7SWei Liu } 86260ce86c7SWei Liu 86360ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 86460ce86c7SWei Liu ret |= S_ISUID; 86560ce86c7SWei Liu } 86660ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 86760ce86c7SWei Liu ret |= S_ISGID; 86860ce86c7SWei Liu } 86960ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 87060ce86c7SWei Liu ret |= S_ISVTX; 87160ce86c7SWei Liu } 87260ce86c7SWei Liu 87360ce86c7SWei Liu return ret; 87460ce86c7SWei Liu } 87560ce86c7SWei Liu 87660ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 87760ce86c7SWei Liu { 87860ce86c7SWei Liu if (stat->type == -1 && 87960ce86c7SWei Liu stat->dev == -1 && 88087032833SAntonios Motakis stat->qid.type == 0xff && 88187032833SAntonios Motakis stat->qid.version == (uint32_t) -1 && 88287032833SAntonios Motakis stat->qid.path == (uint64_t) -1 && 88360ce86c7SWei Liu stat->mode == -1 && 88460ce86c7SWei Liu stat->atime == -1 && 88560ce86c7SWei Liu stat->mtime == -1 && 88660ce86c7SWei Liu stat->length == -1 && 88760ce86c7SWei Liu !stat->name.size && 88860ce86c7SWei Liu !stat->uid.size && 88960ce86c7SWei Liu !stat->gid.size && 89060ce86c7SWei Liu !stat->muid.size && 89160ce86c7SWei Liu stat->n_uid == -1 && 89260ce86c7SWei Liu stat->n_gid == -1 && 89360ce86c7SWei Liu stat->n_muid == -1) { 89460ce86c7SWei Liu return 1; 89560ce86c7SWei Liu } 89660ce86c7SWei Liu 89760ce86c7SWei Liu return 0; 89860ce86c7SWei Liu } 89960ce86c7SWei Liu 90060ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 90160ce86c7SWei Liu { 90260ce86c7SWei Liu v9fs_string_init(&stat->name); 90360ce86c7SWei Liu v9fs_string_init(&stat->uid); 90460ce86c7SWei Liu v9fs_string_init(&stat->gid); 90560ce86c7SWei Liu v9fs_string_init(&stat->muid); 90660ce86c7SWei Liu v9fs_string_init(&stat->extension); 90760ce86c7SWei Liu } 90860ce86c7SWei Liu 90960ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 91060ce86c7SWei Liu { 91160ce86c7SWei Liu v9fs_string_free(&stat->name); 91260ce86c7SWei Liu v9fs_string_free(&stat->uid); 91360ce86c7SWei Liu v9fs_string_free(&stat->gid); 91460ce86c7SWei Liu v9fs_string_free(&stat->muid); 91560ce86c7SWei Liu v9fs_string_free(&stat->extension); 91660ce86c7SWei Liu } 91760ce86c7SWei Liu 91860ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 91960ce86c7SWei Liu { 92060ce86c7SWei Liu uint32_t mode; 92160ce86c7SWei Liu 92260ce86c7SWei Liu mode = stbuf->st_mode & 0777; 92360ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 92460ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 92560ce86c7SWei Liu } 92660ce86c7SWei Liu 92760ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 92860ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 92960ce86c7SWei Liu } 93060ce86c7SWei Liu 93160ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 93260ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 93360ce86c7SWei Liu } 93460ce86c7SWei Liu 93560ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 93660ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 93760ce86c7SWei Liu } 93860ce86c7SWei Liu 93960ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 94060ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 94160ce86c7SWei Liu } 94260ce86c7SWei Liu 94360ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 94460ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 94560ce86c7SWei Liu } 94660ce86c7SWei Liu 94760ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 94860ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 94960ce86c7SWei Liu } 95060ce86c7SWei Liu 95160ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 95260ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 95360ce86c7SWei Liu } 95460ce86c7SWei Liu 95560ce86c7SWei Liu return mode; 95660ce86c7SWei Liu } 95760ce86c7SWei Liu 9586069537fSJan Dakinevich static int coroutine_fn stat_to_v9stat(V9fsPDU *pdu, V9fsPath *path, 9596069537fSJan Dakinevich const char *basename, 96060ce86c7SWei Liu const struct stat *stbuf, 96160ce86c7SWei Liu V9fsStat *v9stat) 96260ce86c7SWei Liu { 96360ce86c7SWei Liu int err; 96460ce86c7SWei Liu 96560ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 96660ce86c7SWei Liu 9673b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, stbuf, &v9stat->qid); 9683b5ee9e8SAntonios Motakis if (err < 0) { 9693b5ee9e8SAntonios Motakis return err; 9703b5ee9e8SAntonios Motakis } 97160ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 97260ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 97360ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 97460ce86c7SWei Liu v9stat->length = stbuf->st_size; 97560ce86c7SWei Liu 976abdf0086SGreg Kurz v9fs_string_free(&v9stat->uid); 977abdf0086SGreg Kurz v9fs_string_free(&v9stat->gid); 978abdf0086SGreg Kurz v9fs_string_free(&v9stat->muid); 97960ce86c7SWei Liu 98060ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 98160ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 98260ce86c7SWei Liu v9stat->n_muid = 0; 98360ce86c7SWei Liu 984abdf0086SGreg Kurz v9fs_string_free(&v9stat->extension); 98560ce86c7SWei Liu 98660ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 9876069537fSJan Dakinevich err = v9fs_co_readlink(pdu, path, &v9stat->extension); 98860ce86c7SWei Liu if (err < 0) { 98960ce86c7SWei Liu return err; 99060ce86c7SWei Liu } 99160ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 99260ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 99360ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 99460ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 99560ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 99660ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 99760ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 99860ce86c7SWei Liu } 99960ce86c7SWei Liu 10006069537fSJan Dakinevich v9fs_string_sprintf(&v9stat->name, "%s", basename); 100160ce86c7SWei Liu 100260ce86c7SWei Liu v9stat->size = 61 + 100360ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 100460ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 100560ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 100660ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 100760ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 100860ce86c7SWei Liu return 0; 100960ce86c7SWei Liu } 101060ce86c7SWei Liu 101160ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 101260ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 101360ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 101460ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 101560ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 101660ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 101760ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 101860ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 101960ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 102060ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 102160ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 102260ce86c7SWei Liu 102360ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 102460ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 102560ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 102660ce86c7SWei Liu 102760ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 102860ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 102960ce86c7SWei Liu 103060ce86c7SWei Liu 10313b5ee9e8SAntonios Motakis static int stat_to_v9stat_dotl(V9fsPDU *pdu, const struct stat *stbuf, 103260ce86c7SWei Liu V9fsStatDotl *v9lstat) 103360ce86c7SWei Liu { 103460ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 103560ce86c7SWei Liu 103660ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 103760ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 103860ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 103960ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 104060ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 104160ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 104260ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 104360ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 104460ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 104560ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 104660ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 104760ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 104860ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 104960ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 105060ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 105160ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 105260ce86c7SWei Liu 10533b5ee9e8SAntonios Motakis return stat_to_qid(pdu, stbuf, &v9lstat->qid); 105460ce86c7SWei Liu } 105560ce86c7SWei Liu 105660ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 105760ce86c7SWei Liu { 105860ce86c7SWei Liu int i; 105960ce86c7SWei Liu 106060ce86c7SWei Liu printf("sg[%d]: {", cnt); 106160ce86c7SWei Liu for (i = 0; i < cnt; i++) { 106260ce86c7SWei Liu if (i) { 106360ce86c7SWei Liu printf(", "); 106460ce86c7SWei Liu } 106560ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 106660ce86c7SWei Liu } 106760ce86c7SWei Liu printf("}\n"); 106860ce86c7SWei Liu } 106960ce86c7SWei Liu 107060ce86c7SWei Liu /* Will call this only for path name based fid */ 107160ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 107260ce86c7SWei Liu { 107360ce86c7SWei Liu V9fsPath str; 107460ce86c7SWei Liu v9fs_path_init(&str); 107560ce86c7SWei Liu v9fs_path_copy(&str, dst); 1076e3e83f2eSGreg Kurz v9fs_path_sprintf(dst, "%s%s", src->data, str.data + len); 107760ce86c7SWei Liu v9fs_path_free(&str); 107860ce86c7SWei Liu } 107960ce86c7SWei Liu 108060ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 108160ce86c7SWei Liu { 108260ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 108360ce86c7SWei Liu } 108460ce86c7SWei Liu 10858440e22eSGreg Kurz static void coroutine_fn v9fs_version(void *opaque) 108660ce86c7SWei Liu { 108760ce86c7SWei Liu ssize_t err; 108860ce86c7SWei Liu V9fsPDU *pdu = opaque; 108960ce86c7SWei Liu V9fsState *s = pdu->s; 109060ce86c7SWei Liu V9fsString version; 109160ce86c7SWei Liu size_t offset = 7; 109260ce86c7SWei Liu 109360ce86c7SWei Liu v9fs_string_init(&version); 109460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 109560ce86c7SWei Liu if (err < 0) { 109660ce86c7SWei Liu goto out; 109760ce86c7SWei Liu } 109860ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 109960ce86c7SWei Liu 110060ce86c7SWei Liu virtfs_reset(pdu); 110160ce86c7SWei Liu 110260ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 110360ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 110460ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 110560ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 110660ce86c7SWei Liu } else { 110760ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 110860ce86c7SWei Liu } 110960ce86c7SWei Liu 111060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 111160ce86c7SWei Liu if (err < 0) { 111260ce86c7SWei Liu goto out; 111360ce86c7SWei Liu } 1114403a905bSPhilippe Mathieu-Daudé err += offset; 111560ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 111660ce86c7SWei Liu out: 1117403a905bSPhilippe Mathieu-Daudé pdu_complete(pdu, err); 111860ce86c7SWei Liu v9fs_string_free(&version); 111960ce86c7SWei Liu } 112060ce86c7SWei Liu 11218440e22eSGreg Kurz static void coroutine_fn v9fs_attach(void *opaque) 112260ce86c7SWei Liu { 112360ce86c7SWei Liu V9fsPDU *pdu = opaque; 112460ce86c7SWei Liu V9fsState *s = pdu->s; 112560ce86c7SWei Liu int32_t fid, afid, n_uname; 112660ce86c7SWei Liu V9fsString uname, aname; 112760ce86c7SWei Liu V9fsFidState *fidp; 112860ce86c7SWei Liu size_t offset = 7; 112960ce86c7SWei Liu V9fsQID qid; 113060ce86c7SWei Liu ssize_t err; 1131fe44dc91SAshijeet Acharya Error *local_err = NULL; 113260ce86c7SWei Liu 113360ce86c7SWei Liu v9fs_string_init(&uname); 113460ce86c7SWei Liu v9fs_string_init(&aname); 113560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 113660ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 113760ce86c7SWei Liu if (err < 0) { 113860ce86c7SWei Liu goto out_nofid; 113960ce86c7SWei Liu } 114060ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 114160ce86c7SWei Liu 114260ce86c7SWei Liu fidp = alloc_fid(s, fid); 114360ce86c7SWei Liu if (fidp == NULL) { 114460ce86c7SWei Liu err = -EINVAL; 114560ce86c7SWei Liu goto out_nofid; 114660ce86c7SWei Liu } 114760ce86c7SWei Liu fidp->uid = n_uname; 114860ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 114960ce86c7SWei Liu if (err < 0) { 115060ce86c7SWei Liu err = -EINVAL; 115160ce86c7SWei Liu clunk_fid(s, fid); 115260ce86c7SWei Liu goto out; 115360ce86c7SWei Liu } 115460ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 115560ce86c7SWei Liu if (err < 0) { 115660ce86c7SWei Liu err = -EINVAL; 115760ce86c7SWei Liu clunk_fid(s, fid); 115860ce86c7SWei Liu goto out; 115960ce86c7SWei Liu } 1160fe44dc91SAshijeet Acharya 1161fe44dc91SAshijeet Acharya /* 1162fe44dc91SAshijeet Acharya * disable migration if we haven't done already. 1163fe44dc91SAshijeet Acharya * attach could get called multiple times for the same export. 1164fe44dc91SAshijeet Acharya */ 1165fe44dc91SAshijeet Acharya if (!s->migration_blocker) { 1166fe44dc91SAshijeet Acharya error_setg(&s->migration_blocker, 1167fe44dc91SAshijeet Acharya "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 1168fe44dc91SAshijeet Acharya s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 1169fe44dc91SAshijeet Acharya err = migrate_add_blocker(s->migration_blocker, &local_err); 1170fe44dc91SAshijeet Acharya if (local_err) { 1171fe44dc91SAshijeet Acharya error_free(local_err); 1172fe44dc91SAshijeet Acharya error_free(s->migration_blocker); 1173fe44dc91SAshijeet Acharya s->migration_blocker = NULL; 1174fe44dc91SAshijeet Acharya clunk_fid(s, fid); 1175fe44dc91SAshijeet Acharya goto out; 1176fe44dc91SAshijeet Acharya } 1177fe44dc91SAshijeet Acharya s->root_fid = fid; 1178fe44dc91SAshijeet Acharya } 1179fe44dc91SAshijeet Acharya 118060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 118160ce86c7SWei Liu if (err < 0) { 118260ce86c7SWei Liu clunk_fid(s, fid); 118360ce86c7SWei Liu goto out; 118460ce86c7SWei Liu } 118560ce86c7SWei Liu err += offset; 1186fe44dc91SAshijeet Acharya 118756f101ecSGreg Kurz memcpy(&s->root_qid, &qid, sizeof(qid)); 118860ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 118960ce86c7SWei Liu qid.type, qid.version, qid.path); 119060ce86c7SWei Liu out: 119160ce86c7SWei Liu put_fid(pdu, fidp); 119260ce86c7SWei Liu out_nofid: 119360ce86c7SWei Liu pdu_complete(pdu, err); 119460ce86c7SWei Liu v9fs_string_free(&uname); 119560ce86c7SWei Liu v9fs_string_free(&aname); 119660ce86c7SWei Liu } 119760ce86c7SWei Liu 11988440e22eSGreg Kurz static void coroutine_fn v9fs_stat(void *opaque) 119960ce86c7SWei Liu { 120060ce86c7SWei Liu int32_t fid; 120160ce86c7SWei Liu V9fsStat v9stat; 120260ce86c7SWei Liu ssize_t err = 0; 120360ce86c7SWei Liu size_t offset = 7; 120460ce86c7SWei Liu struct stat stbuf; 120560ce86c7SWei Liu V9fsFidState *fidp; 120660ce86c7SWei Liu V9fsPDU *pdu = opaque; 12076069537fSJan Dakinevich char *basename; 120860ce86c7SWei Liu 120960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 121060ce86c7SWei Liu if (err < 0) { 121160ce86c7SWei Liu goto out_nofid; 121260ce86c7SWei Liu } 121360ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 121460ce86c7SWei Liu 121560ce86c7SWei Liu fidp = get_fid(pdu, fid); 121660ce86c7SWei Liu if (fidp == NULL) { 121760ce86c7SWei Liu err = -ENOENT; 121860ce86c7SWei Liu goto out_nofid; 121960ce86c7SWei Liu } 122060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 122160ce86c7SWei Liu if (err < 0) { 122260ce86c7SWei Liu goto out; 122360ce86c7SWei Liu } 12246069537fSJan Dakinevich basename = g_path_get_basename(fidp->path.data); 12256069537fSJan Dakinevich err = stat_to_v9stat(pdu, &fidp->path, basename, &stbuf, &v9stat); 12266069537fSJan Dakinevich g_free(basename); 122760ce86c7SWei Liu if (err < 0) { 122860ce86c7SWei Liu goto out; 122960ce86c7SWei Liu } 123060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 123160ce86c7SWei Liu if (err < 0) { 123260ce86c7SWei Liu v9fs_stat_free(&v9stat); 123360ce86c7SWei Liu goto out; 123460ce86c7SWei Liu } 123560ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 123660ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 123760ce86c7SWei Liu err += offset; 123860ce86c7SWei Liu v9fs_stat_free(&v9stat); 123960ce86c7SWei Liu out: 124060ce86c7SWei Liu put_fid(pdu, fidp); 124160ce86c7SWei Liu out_nofid: 124260ce86c7SWei Liu pdu_complete(pdu, err); 124360ce86c7SWei Liu } 124460ce86c7SWei Liu 12458440e22eSGreg Kurz static void coroutine_fn v9fs_getattr(void *opaque) 124660ce86c7SWei Liu { 124760ce86c7SWei Liu int32_t fid; 124860ce86c7SWei Liu size_t offset = 7; 124960ce86c7SWei Liu ssize_t retval = 0; 125060ce86c7SWei Liu struct stat stbuf; 125160ce86c7SWei Liu V9fsFidState *fidp; 125260ce86c7SWei Liu uint64_t request_mask; 125360ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 125460ce86c7SWei Liu V9fsPDU *pdu = opaque; 125560ce86c7SWei Liu 125660ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 125760ce86c7SWei Liu if (retval < 0) { 125860ce86c7SWei Liu goto out_nofid; 125960ce86c7SWei Liu } 126060ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 126160ce86c7SWei Liu 126260ce86c7SWei Liu fidp = get_fid(pdu, fid); 126360ce86c7SWei Liu if (fidp == NULL) { 126460ce86c7SWei Liu retval = -ENOENT; 126560ce86c7SWei Liu goto out_nofid; 126660ce86c7SWei Liu } 126760ce86c7SWei Liu /* 126860ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 126960ce86c7SWei Liu * need to look at request_mask. 127060ce86c7SWei Liu */ 127160ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 127260ce86c7SWei Liu if (retval < 0) { 127360ce86c7SWei Liu goto out; 127460ce86c7SWei Liu } 12753b5ee9e8SAntonios Motakis retval = stat_to_v9stat_dotl(pdu, &stbuf, &v9stat_dotl); 12763b5ee9e8SAntonios Motakis if (retval < 0) { 12773b5ee9e8SAntonios Motakis goto out; 12783b5ee9e8SAntonios Motakis } 127960ce86c7SWei Liu 128060ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 128160ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 128260ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 128360ce86c7SWei Liu switch (retval) { 128460ce86c7SWei Liu case 0: 128560ce86c7SWei Liu /* we have valid st_gen: update result mask */ 128660ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 128760ce86c7SWei Liu break; 128860ce86c7SWei Liu case -EINTR: 128960ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 129060ce86c7SWei Liu goto out; 129160ce86c7SWei Liu default: 129260ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 129360ce86c7SWei Liu break; 129460ce86c7SWei Liu } 129560ce86c7SWei Liu } 129660ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 129760ce86c7SWei Liu if (retval < 0) { 129860ce86c7SWei Liu goto out; 129960ce86c7SWei Liu } 130060ce86c7SWei Liu retval += offset; 130160ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 130260ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 130360ce86c7SWei Liu v9stat_dotl.st_gid); 130460ce86c7SWei Liu out: 130560ce86c7SWei Liu put_fid(pdu, fidp); 130660ce86c7SWei Liu out_nofid: 130760ce86c7SWei Liu pdu_complete(pdu, retval); 130860ce86c7SWei Liu } 130960ce86c7SWei Liu 131060ce86c7SWei Liu /* Attribute flags */ 131160ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 131260ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 131360ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 131460ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 131560ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 131660ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 131760ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 131860ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 131960ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 132060ce86c7SWei Liu 132160ce86c7SWei Liu #define P9_ATTR_MASK 127 132260ce86c7SWei Liu 13238440e22eSGreg Kurz static void coroutine_fn v9fs_setattr(void *opaque) 132460ce86c7SWei Liu { 132560ce86c7SWei Liu int err = 0; 132660ce86c7SWei Liu int32_t fid; 132760ce86c7SWei Liu V9fsFidState *fidp; 132860ce86c7SWei Liu size_t offset = 7; 132960ce86c7SWei Liu V9fsIattr v9iattr; 133060ce86c7SWei Liu V9fsPDU *pdu = opaque; 133160ce86c7SWei Liu 133260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 133360ce86c7SWei Liu if (err < 0) { 133460ce86c7SWei Liu goto out_nofid; 133560ce86c7SWei Liu } 133660ce86c7SWei Liu 13378f9c64bfSGreg Kurz trace_v9fs_setattr(pdu->tag, pdu->id, fid, 13388f9c64bfSGreg Kurz v9iattr.valid, v9iattr.mode, v9iattr.uid, v9iattr.gid, 13398f9c64bfSGreg Kurz v9iattr.size, v9iattr.atime_sec, v9iattr.mtime_sec); 13408f9c64bfSGreg Kurz 134160ce86c7SWei Liu fidp = get_fid(pdu, fid); 134260ce86c7SWei Liu if (fidp == NULL) { 134360ce86c7SWei Liu err = -EINVAL; 134460ce86c7SWei Liu goto out_nofid; 134560ce86c7SWei Liu } 134660ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 134760ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 134860ce86c7SWei Liu if (err < 0) { 134960ce86c7SWei Liu goto out; 135060ce86c7SWei Liu } 135160ce86c7SWei Liu } 135260ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 135360ce86c7SWei Liu struct timespec times[2]; 135460ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 135560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 135660ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 135760ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 135860ce86c7SWei Liu } else { 135960ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 136060ce86c7SWei Liu } 136160ce86c7SWei Liu } else { 136260ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 136360ce86c7SWei Liu } 136460ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 136560ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 136660ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 136760ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 136860ce86c7SWei Liu } else { 136960ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 137060ce86c7SWei Liu } 137160ce86c7SWei Liu } else { 137260ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 137360ce86c7SWei Liu } 137460ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 137560ce86c7SWei Liu if (err < 0) { 137660ce86c7SWei Liu goto out; 137760ce86c7SWei Liu } 137860ce86c7SWei Liu } 137960ce86c7SWei Liu /* 138060ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 138160ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 138260ce86c7SWei Liu */ 138360ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 138460ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 138560ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 138660ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 138760ce86c7SWei Liu v9iattr.uid = -1; 138860ce86c7SWei Liu } 138960ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 139060ce86c7SWei Liu v9iattr.gid = -1; 139160ce86c7SWei Liu } 139260ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 139360ce86c7SWei Liu v9iattr.gid); 139460ce86c7SWei Liu if (err < 0) { 139560ce86c7SWei Liu goto out; 139660ce86c7SWei Liu } 139760ce86c7SWei Liu } 139860ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 139960ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 140060ce86c7SWei Liu if (err < 0) { 140160ce86c7SWei Liu goto out; 140260ce86c7SWei Liu } 140360ce86c7SWei Liu } 140460ce86c7SWei Liu err = offset; 14058f9c64bfSGreg Kurz trace_v9fs_setattr_return(pdu->tag, pdu->id); 140660ce86c7SWei Liu out: 140760ce86c7SWei Liu put_fid(pdu, fidp); 140860ce86c7SWei Liu out_nofid: 140960ce86c7SWei Liu pdu_complete(pdu, err); 141060ce86c7SWei Liu } 141160ce86c7SWei Liu 141260ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 141360ce86c7SWei Liu { 141460ce86c7SWei Liu int i; 141560ce86c7SWei Liu ssize_t err; 141660ce86c7SWei Liu size_t offset = 7; 141760ce86c7SWei Liu 141860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 141960ce86c7SWei Liu if (err < 0) { 142060ce86c7SWei Liu return err; 142160ce86c7SWei Liu } 142260ce86c7SWei Liu offset += err; 142360ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 142460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 142560ce86c7SWei Liu if (err < 0) { 142660ce86c7SWei Liu return err; 142760ce86c7SWei Liu } 142860ce86c7SWei Liu offset += err; 142960ce86c7SWei Liu } 143060ce86c7SWei Liu return offset; 143160ce86c7SWei Liu } 143260ce86c7SWei Liu 1433fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1434fff39a7aSGreg Kurz { 1435fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1436fff39a7aSGreg Kurz } 1437fff39a7aSGreg Kurz 143856f101ecSGreg Kurz static bool not_same_qid(const V9fsQID *qid1, const V9fsQID *qid2) 143956f101ecSGreg Kurz { 144056f101ecSGreg Kurz return 144156f101ecSGreg Kurz qid1->type != qid2->type || 144256f101ecSGreg Kurz qid1->version != qid2->version || 144356f101ecSGreg Kurz qid1->path != qid2->path; 144456f101ecSGreg Kurz } 144556f101ecSGreg Kurz 14468440e22eSGreg Kurz static void coroutine_fn v9fs_walk(void *opaque) 144760ce86c7SWei Liu { 144860ce86c7SWei Liu int name_idx; 144960ce86c7SWei Liu V9fsQID *qids = NULL; 145060ce86c7SWei Liu int i, err = 0; 145160ce86c7SWei Liu V9fsPath dpath, path; 145260ce86c7SWei Liu uint16_t nwnames; 145360ce86c7SWei Liu struct stat stbuf; 145460ce86c7SWei Liu size_t offset = 7; 145560ce86c7SWei Liu int32_t fid, newfid; 145660ce86c7SWei Liu V9fsString *wnames = NULL; 145760ce86c7SWei Liu V9fsFidState *fidp; 145860ce86c7SWei Liu V9fsFidState *newfidp = NULL; 145960ce86c7SWei Liu V9fsPDU *pdu = opaque; 146060ce86c7SWei Liu V9fsState *s = pdu->s; 146156f101ecSGreg Kurz V9fsQID qid; 146260ce86c7SWei Liu 146360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 146460ce86c7SWei Liu if (err < 0) { 146560ce86c7SWei Liu pdu_complete(pdu, err); 146660ce86c7SWei Liu return ; 146760ce86c7SWei Liu } 146860ce86c7SWei Liu offset += err; 146960ce86c7SWei Liu 147060ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 147160ce86c7SWei Liu 147260ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 14731923923bSGreg Kurz wnames = g_new0(V9fsString, nwnames); 14741923923bSGreg Kurz qids = g_new0(V9fsQID, nwnames); 147560ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 147660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 147760ce86c7SWei Liu if (err < 0) { 147860ce86c7SWei Liu goto out_nofid; 147960ce86c7SWei Liu } 1480fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1481fff39a7aSGreg Kurz err = -ENOENT; 1482fff39a7aSGreg Kurz goto out_nofid; 1483fff39a7aSGreg Kurz } 148460ce86c7SWei Liu offset += err; 148560ce86c7SWei Liu } 148660ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 148760ce86c7SWei Liu err = -EINVAL; 148860ce86c7SWei Liu goto out_nofid; 148960ce86c7SWei Liu } 149060ce86c7SWei Liu fidp = get_fid(pdu, fid); 149160ce86c7SWei Liu if (fidp == NULL) { 149260ce86c7SWei Liu err = -ENOENT; 149360ce86c7SWei Liu goto out_nofid; 149460ce86c7SWei Liu } 149556f101ecSGreg Kurz 149613fd08e6SGreg Kurz v9fs_path_init(&dpath); 149713fd08e6SGreg Kurz v9fs_path_init(&path); 149813fd08e6SGreg Kurz 149956f101ecSGreg Kurz err = fid_to_qid(pdu, fidp, &qid); 150056f101ecSGreg Kurz if (err < 0) { 150156f101ecSGreg Kurz goto out; 150256f101ecSGreg Kurz } 150356f101ecSGreg Kurz 150460ce86c7SWei Liu /* 150560ce86c7SWei Liu * Both dpath and path initially poin to fidp. 150660ce86c7SWei Liu * Needed to handle request with nwnames == 0 150760ce86c7SWei Liu */ 150860ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 150960ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 151060ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 151156f101ecSGreg Kurz if (not_same_qid(&pdu->s->root_qid, &qid) || 151256f101ecSGreg Kurz strcmp("..", wnames[name_idx].data)) { 151356f101ecSGreg Kurz err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, 151456f101ecSGreg Kurz &path); 151560ce86c7SWei Liu if (err < 0) { 151660ce86c7SWei Liu goto out; 151760ce86c7SWei Liu } 151856f101ecSGreg Kurz 151960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 152060ce86c7SWei Liu if (err < 0) { 152160ce86c7SWei Liu goto out; 152260ce86c7SWei Liu } 15233b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 15243b5ee9e8SAntonios Motakis if (err < 0) { 15253b5ee9e8SAntonios Motakis goto out; 15263b5ee9e8SAntonios Motakis } 152760ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 152860ce86c7SWei Liu } 152956f101ecSGreg Kurz memcpy(&qids[name_idx], &qid, sizeof(qid)); 153056f101ecSGreg Kurz } 153160ce86c7SWei Liu if (fid == newfid) { 153249dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 153349dd946bSGreg Kurz err = -EINVAL; 153449dd946bSGreg Kurz goto out; 153549dd946bSGreg Kurz } 15365b3c77aaSGreg Kurz v9fs_path_write_lock(s); 153760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 15385b3c77aaSGreg Kurz v9fs_path_unlock(s); 153960ce86c7SWei Liu } else { 154060ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 154160ce86c7SWei Liu if (newfidp == NULL) { 154260ce86c7SWei Liu err = -EINVAL; 154360ce86c7SWei Liu goto out; 154460ce86c7SWei Liu } 154560ce86c7SWei Liu newfidp->uid = fidp->uid; 154660ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 154760ce86c7SWei Liu } 154860ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 154960ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 155060ce86c7SWei Liu out: 155160ce86c7SWei Liu put_fid(pdu, fidp); 155260ce86c7SWei Liu if (newfidp) { 155360ce86c7SWei Liu put_fid(pdu, newfidp); 155460ce86c7SWei Liu } 155560ce86c7SWei Liu v9fs_path_free(&dpath); 155660ce86c7SWei Liu v9fs_path_free(&path); 155760ce86c7SWei Liu out_nofid: 155860ce86c7SWei Liu pdu_complete(pdu, err); 155960ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 156060ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 156160ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 156260ce86c7SWei Liu } 156360ce86c7SWei Liu g_free(wnames); 156460ce86c7SWei Liu g_free(qids); 156560ce86c7SWei Liu } 156660ce86c7SWei Liu } 156760ce86c7SWei Liu 15688440e22eSGreg Kurz static int32_t coroutine_fn get_iounit(V9fsPDU *pdu, V9fsPath *path) 156960ce86c7SWei Liu { 157060ce86c7SWei Liu struct statfs stbuf; 157160ce86c7SWei Liu int32_t iounit = 0; 157260ce86c7SWei Liu V9fsState *s = pdu->s; 157360ce86c7SWei Liu 157460ce86c7SWei Liu /* 157560ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 157660ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 157760ce86c7SWei Liu */ 157860ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 157960ce86c7SWei Liu iounit = stbuf.f_bsize; 158060ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 158160ce86c7SWei Liu } 158260ce86c7SWei Liu if (!iounit) { 158360ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 158460ce86c7SWei Liu } 158560ce86c7SWei Liu return iounit; 158660ce86c7SWei Liu } 158760ce86c7SWei Liu 15888440e22eSGreg Kurz static void coroutine_fn v9fs_open(void *opaque) 158960ce86c7SWei Liu { 159060ce86c7SWei Liu int flags; 159160ce86c7SWei Liu int32_t fid; 159260ce86c7SWei Liu int32_t mode; 159360ce86c7SWei Liu V9fsQID qid; 159460ce86c7SWei Liu int iounit = 0; 159560ce86c7SWei Liu ssize_t err = 0; 159660ce86c7SWei Liu size_t offset = 7; 159760ce86c7SWei Liu struct stat stbuf; 159860ce86c7SWei Liu V9fsFidState *fidp; 159960ce86c7SWei Liu V9fsPDU *pdu = opaque; 160060ce86c7SWei Liu V9fsState *s = pdu->s; 160160ce86c7SWei Liu 160260ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 160360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 160460ce86c7SWei Liu } else { 160560ce86c7SWei Liu uint8_t modebyte; 160660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 160760ce86c7SWei Liu mode = modebyte; 160860ce86c7SWei Liu } 160960ce86c7SWei Liu if (err < 0) { 161060ce86c7SWei Liu goto out_nofid; 161160ce86c7SWei Liu } 161260ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 161360ce86c7SWei Liu 161460ce86c7SWei Liu fidp = get_fid(pdu, fid); 161560ce86c7SWei Liu if (fidp == NULL) { 161660ce86c7SWei Liu err = -ENOENT; 161760ce86c7SWei Liu goto out_nofid; 161860ce86c7SWei Liu } 161949dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 162049dd946bSGreg Kurz err = -EINVAL; 162149dd946bSGreg Kurz goto out; 162249dd946bSGreg Kurz } 162360ce86c7SWei Liu 162460ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 162560ce86c7SWei Liu if (err < 0) { 162660ce86c7SWei Liu goto out; 162760ce86c7SWei Liu } 16283b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 16293b5ee9e8SAntonios Motakis if (err < 0) { 16303b5ee9e8SAntonios Motakis goto out; 16313b5ee9e8SAntonios Motakis } 163260ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 163360ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 163460ce86c7SWei Liu if (err < 0) { 163560ce86c7SWei Liu goto out; 163660ce86c7SWei Liu } 163760ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 163860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 163960ce86c7SWei Liu if (err < 0) { 164060ce86c7SWei Liu goto out; 164160ce86c7SWei Liu } 164260ce86c7SWei Liu err += offset; 164360ce86c7SWei Liu } else { 164460ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 164560ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 164660ce86c7SWei Liu } else { 164760ce86c7SWei Liu flags = omode_to_uflags(mode); 164860ce86c7SWei Liu } 164960ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 165060ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 165160ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 165260ce86c7SWei Liu err = -EROFS; 165360ce86c7SWei Liu goto out; 165460ce86c7SWei Liu } 165560ce86c7SWei Liu } 165660ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 165760ce86c7SWei Liu if (err < 0) { 165860ce86c7SWei Liu goto out; 165960ce86c7SWei Liu } 166060ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 166160ce86c7SWei Liu fidp->open_flags = flags; 166260ce86c7SWei Liu if (flags & O_EXCL) { 166360ce86c7SWei Liu /* 166460ce86c7SWei Liu * We let the host file system do O_EXCL check 166560ce86c7SWei Liu * We should not reclaim such fd 166660ce86c7SWei Liu */ 166760ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 166860ce86c7SWei Liu } 166960ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 167060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 167160ce86c7SWei Liu if (err < 0) { 167260ce86c7SWei Liu goto out; 167360ce86c7SWei Liu } 167460ce86c7SWei Liu err += offset; 167560ce86c7SWei Liu } 167660ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 167760ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 167860ce86c7SWei Liu out: 167960ce86c7SWei Liu put_fid(pdu, fidp); 168060ce86c7SWei Liu out_nofid: 168160ce86c7SWei Liu pdu_complete(pdu, err); 168260ce86c7SWei Liu } 168360ce86c7SWei Liu 16848440e22eSGreg Kurz static void coroutine_fn v9fs_lcreate(void *opaque) 168560ce86c7SWei Liu { 168660ce86c7SWei Liu int32_t dfid, flags, mode; 168760ce86c7SWei Liu gid_t gid; 168860ce86c7SWei Liu ssize_t err = 0; 168960ce86c7SWei Liu ssize_t offset = 7; 169060ce86c7SWei Liu V9fsString name; 169160ce86c7SWei Liu V9fsFidState *fidp; 169260ce86c7SWei Liu struct stat stbuf; 169360ce86c7SWei Liu V9fsQID qid; 169460ce86c7SWei Liu int32_t iounit; 169560ce86c7SWei Liu V9fsPDU *pdu = opaque; 169660ce86c7SWei Liu 169760ce86c7SWei Liu v9fs_string_init(&name); 169860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 169960ce86c7SWei Liu &name, &flags, &mode, &gid); 170060ce86c7SWei Liu if (err < 0) { 170160ce86c7SWei Liu goto out_nofid; 170260ce86c7SWei Liu } 170360ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 170460ce86c7SWei Liu 1705fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1706fff39a7aSGreg Kurz err = -ENOENT; 1707fff39a7aSGreg Kurz goto out_nofid; 1708fff39a7aSGreg Kurz } 1709fff39a7aSGreg Kurz 1710805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1711805b5d98SGreg Kurz err = -EEXIST; 1712805b5d98SGreg Kurz goto out_nofid; 1713805b5d98SGreg Kurz } 1714805b5d98SGreg Kurz 171560ce86c7SWei Liu fidp = get_fid(pdu, dfid); 171660ce86c7SWei Liu if (fidp == NULL) { 171760ce86c7SWei Liu err = -ENOENT; 171860ce86c7SWei Liu goto out_nofid; 171960ce86c7SWei Liu } 1720d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 1721d63fb193SLi Qiang err = -EINVAL; 1722d63fb193SLi Qiang goto out; 1723d63fb193SLi Qiang } 172460ce86c7SWei Liu 172560ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 172660ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 172760ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 172860ce86c7SWei Liu if (err < 0) { 172960ce86c7SWei Liu goto out; 173060ce86c7SWei Liu } 173160ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 173260ce86c7SWei Liu fidp->open_flags = flags; 173360ce86c7SWei Liu if (flags & O_EXCL) { 173460ce86c7SWei Liu /* 173560ce86c7SWei Liu * We let the host file system do O_EXCL check 173660ce86c7SWei Liu * We should not reclaim such fd 173760ce86c7SWei Liu */ 173860ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 173960ce86c7SWei Liu } 174060ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 17413b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 17423b5ee9e8SAntonios Motakis if (err < 0) { 17433b5ee9e8SAntonios Motakis goto out; 17443b5ee9e8SAntonios Motakis } 174560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 174660ce86c7SWei Liu if (err < 0) { 174760ce86c7SWei Liu goto out; 174860ce86c7SWei Liu } 174960ce86c7SWei Liu err += offset; 175060ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 175160ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 175260ce86c7SWei Liu out: 175360ce86c7SWei Liu put_fid(pdu, fidp); 175460ce86c7SWei Liu out_nofid: 175560ce86c7SWei Liu pdu_complete(pdu, err); 175660ce86c7SWei Liu v9fs_string_free(&name); 175760ce86c7SWei Liu } 175860ce86c7SWei Liu 1759a1bf8b74SGreg Kurz static void coroutine_fn v9fs_fsync(void *opaque) 176060ce86c7SWei Liu { 176160ce86c7SWei Liu int err; 176260ce86c7SWei Liu int32_t fid; 176360ce86c7SWei Liu int datasync; 176460ce86c7SWei Liu size_t offset = 7; 176560ce86c7SWei Liu V9fsFidState *fidp; 176660ce86c7SWei Liu V9fsPDU *pdu = opaque; 176760ce86c7SWei Liu 176860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 176960ce86c7SWei Liu if (err < 0) { 177060ce86c7SWei Liu goto out_nofid; 177160ce86c7SWei Liu } 177260ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 177360ce86c7SWei Liu 177460ce86c7SWei Liu fidp = get_fid(pdu, fid); 177560ce86c7SWei Liu if (fidp == NULL) { 177660ce86c7SWei Liu err = -ENOENT; 177760ce86c7SWei Liu goto out_nofid; 177860ce86c7SWei Liu } 177960ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 178060ce86c7SWei Liu if (!err) { 178160ce86c7SWei Liu err = offset; 178260ce86c7SWei Liu } 178360ce86c7SWei Liu put_fid(pdu, fidp); 178460ce86c7SWei Liu out_nofid: 178560ce86c7SWei Liu pdu_complete(pdu, err); 178660ce86c7SWei Liu } 178760ce86c7SWei Liu 17888440e22eSGreg Kurz static void coroutine_fn v9fs_clunk(void *opaque) 178960ce86c7SWei Liu { 179060ce86c7SWei Liu int err; 179160ce86c7SWei Liu int32_t fid; 179260ce86c7SWei Liu size_t offset = 7; 179360ce86c7SWei Liu V9fsFidState *fidp; 179460ce86c7SWei Liu V9fsPDU *pdu = opaque; 179560ce86c7SWei Liu V9fsState *s = pdu->s; 179660ce86c7SWei Liu 179760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 179860ce86c7SWei Liu if (err < 0) { 179960ce86c7SWei Liu goto out_nofid; 180060ce86c7SWei Liu } 180160ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 180260ce86c7SWei Liu 180360ce86c7SWei Liu fidp = clunk_fid(s, fid); 180460ce86c7SWei Liu if (fidp == NULL) { 180560ce86c7SWei Liu err = -ENOENT; 180660ce86c7SWei Liu goto out_nofid; 180760ce86c7SWei Liu } 180860ce86c7SWei Liu /* 180960ce86c7SWei Liu * Bump the ref so that put_fid will 181060ce86c7SWei Liu * free the fid. 181160ce86c7SWei Liu */ 181260ce86c7SWei Liu fidp->ref++; 181360ce86c7SWei Liu err = put_fid(pdu, fidp); 181460ce86c7SWei Liu if (!err) { 181560ce86c7SWei Liu err = offset; 181660ce86c7SWei Liu } 181760ce86c7SWei Liu out_nofid: 181860ce86c7SWei Liu pdu_complete(pdu, err); 181960ce86c7SWei Liu } 182060ce86c7SWei Liu 1821bcb8998fSStefano Stabellini /* 1822bcb8998fSStefano Stabellini * Create a QEMUIOVector for a sub-region of PDU iovecs 1823bcb8998fSStefano Stabellini * 1824bcb8998fSStefano Stabellini * @qiov: uninitialized QEMUIOVector 1825bcb8998fSStefano Stabellini * @skip: number of bytes to skip from beginning of PDU 1826bcb8998fSStefano Stabellini * @size: number of bytes to include 1827bcb8998fSStefano Stabellini * @is_write: true - write, false - read 1828bcb8998fSStefano Stabellini * 1829bcb8998fSStefano Stabellini * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 1830bcb8998fSStefano Stabellini * with qemu_iovec_destroy(). 1831bcb8998fSStefano Stabellini */ 1832bcb8998fSStefano Stabellini static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 1833bcb8998fSStefano Stabellini size_t skip, size_t size, 1834bcb8998fSStefano Stabellini bool is_write) 1835bcb8998fSStefano Stabellini { 1836bcb8998fSStefano Stabellini QEMUIOVector elem; 1837bcb8998fSStefano Stabellini struct iovec *iov; 1838bcb8998fSStefano Stabellini unsigned int niov; 1839bcb8998fSStefano Stabellini 184088da0b03SStefano Stabellini if (is_write) { 18418d37de41SGreg Kurz pdu->s->transport->init_out_iov_from_pdu(pdu, &iov, &niov, size + skip); 184288da0b03SStefano Stabellini } else { 1843fa0eb5c5SGreg Kurz pdu->s->transport->init_in_iov_from_pdu(pdu, &iov, &niov, size + skip); 184488da0b03SStefano Stabellini } 1845bcb8998fSStefano Stabellini 1846bcb8998fSStefano Stabellini qemu_iovec_init_external(&elem, iov, niov); 1847bcb8998fSStefano Stabellini qemu_iovec_init(qiov, niov); 1848bcb8998fSStefano Stabellini qemu_iovec_concat(qiov, &elem, skip, size); 1849bcb8998fSStefano Stabellini } 1850bcb8998fSStefano Stabellini 185160ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 185260ce86c7SWei Liu uint64_t off, uint32_t max_count) 185360ce86c7SWei Liu { 185460ce86c7SWei Liu ssize_t err; 185560ce86c7SWei Liu size_t offset = 7; 18567e55d65cSLi Qiang uint64_t read_count; 1857bcb8998fSStefano Stabellini QEMUIOVector qiov_full; 185860ce86c7SWei Liu 18597e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 18607e55d65cSLi Qiang read_count = 0; 18617e55d65cSLi Qiang } else { 18627e55d65cSLi Qiang read_count = fidp->fs.xattr.len - off; 18637e55d65cSLi Qiang } 186460ce86c7SWei Liu if (read_count > max_count) { 186560ce86c7SWei Liu read_count = max_count; 186660ce86c7SWei Liu } 186760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 186860ce86c7SWei Liu if (err < 0) { 186960ce86c7SWei Liu return err; 187060ce86c7SWei Liu } 187160ce86c7SWei Liu offset += err; 187200588a0aSWei Liu 1873fa0eb5c5SGreg Kurz v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, read_count, false); 1874fa0eb5c5SGreg Kurz err = v9fs_pack(qiov_full.iov, qiov_full.niov, 0, 187560ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 187660ce86c7SWei Liu read_count); 1877bcb8998fSStefano Stabellini qemu_iovec_destroy(&qiov_full); 187860ce86c7SWei Liu if (err < 0) { 187960ce86c7SWei Liu return err; 188060ce86c7SWei Liu } 188160ce86c7SWei Liu offset += err; 188260ce86c7SWei Liu return offset; 188360ce86c7SWei Liu } 188460ce86c7SWei Liu 18858440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir_with_stat(V9fsPDU *pdu, 18868440e22eSGreg Kurz V9fsFidState *fidp, 18878440e22eSGreg Kurz uint32_t max_count) 188860ce86c7SWei Liu { 188960ce86c7SWei Liu V9fsPath path; 189060ce86c7SWei Liu V9fsStat v9stat; 189160ce86c7SWei Liu int len, err = 0; 189260ce86c7SWei Liu int32_t count = 0; 189360ce86c7SWei Liu struct stat stbuf; 189460ce86c7SWei Liu off_t saved_dir_pos; 1895635324e8SGreg Kurz struct dirent *dent; 189660ce86c7SWei Liu 189760ce86c7SWei Liu /* save the directory position */ 189860ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 189960ce86c7SWei Liu if (saved_dir_pos < 0) { 190060ce86c7SWei Liu return saved_dir_pos; 190160ce86c7SWei Liu } 190260ce86c7SWei Liu 190360ce86c7SWei Liu while (1) { 190460ce86c7SWei Liu v9fs_path_init(&path); 19057cde47d4SGreg Kurz 19067cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 19077cde47d4SGreg Kurz 1908635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1909635324e8SGreg Kurz if (err || !dent) { 191060ce86c7SWei Liu break; 191160ce86c7SWei Liu } 191260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 191360ce86c7SWei Liu if (err < 0) { 19148762a46dSGreg Kurz break; 191560ce86c7SWei Liu } 191660ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 191760ce86c7SWei Liu if (err < 0) { 19188762a46dSGreg Kurz break; 191960ce86c7SWei Liu } 19206069537fSJan Dakinevich err = stat_to_v9stat(pdu, &path, dent->d_name, &stbuf, &v9stat); 192160ce86c7SWei Liu if (err < 0) { 19228762a46dSGreg Kurz break; 192360ce86c7SWei Liu } 1924772a7369SJan Dakinevich if ((count + v9stat.size + 2) > max_count) { 19257cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19267cde47d4SGreg Kurz 192760ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 192860ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 192960ce86c7SWei Liu v9fs_stat_free(&v9stat); 193060ce86c7SWei Liu v9fs_path_free(&path); 193160ce86c7SWei Liu return count; 193260ce86c7SWei Liu } 1933772a7369SJan Dakinevich 1934772a7369SJan Dakinevich /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 1935772a7369SJan Dakinevich len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 1936772a7369SJan Dakinevich 1937772a7369SJan Dakinevich v9fs_readdir_unlock(&fidp->fs.dir); 1938772a7369SJan Dakinevich 1939772a7369SJan Dakinevich if (len < 0) { 1940772a7369SJan Dakinevich v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 1941772a7369SJan Dakinevich v9fs_stat_free(&v9stat); 1942772a7369SJan Dakinevich v9fs_path_free(&path); 1943772a7369SJan Dakinevich return len; 1944772a7369SJan Dakinevich } 194560ce86c7SWei Liu count += len; 194660ce86c7SWei Liu v9fs_stat_free(&v9stat); 194760ce86c7SWei Liu v9fs_path_free(&path); 194860ce86c7SWei Liu saved_dir_pos = dent->d_off; 194960ce86c7SWei Liu } 19508762a46dSGreg Kurz 19517cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 19527cde47d4SGreg Kurz 195360ce86c7SWei Liu v9fs_path_free(&path); 195460ce86c7SWei Liu if (err < 0) { 195560ce86c7SWei Liu return err; 195660ce86c7SWei Liu } 195760ce86c7SWei Liu return count; 195860ce86c7SWei Liu } 195960ce86c7SWei Liu 19608440e22eSGreg Kurz static void coroutine_fn v9fs_read(void *opaque) 196160ce86c7SWei Liu { 196260ce86c7SWei Liu int32_t fid; 196360ce86c7SWei Liu uint64_t off; 196460ce86c7SWei Liu ssize_t err = 0; 196560ce86c7SWei Liu int32_t count = 0; 196660ce86c7SWei Liu size_t offset = 7; 196760ce86c7SWei Liu uint32_t max_count; 196860ce86c7SWei Liu V9fsFidState *fidp; 196960ce86c7SWei Liu V9fsPDU *pdu = opaque; 197060ce86c7SWei Liu V9fsState *s = pdu->s; 197160ce86c7SWei Liu 197260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 197360ce86c7SWei Liu if (err < 0) { 197460ce86c7SWei Liu goto out_nofid; 197560ce86c7SWei Liu } 197660ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 197760ce86c7SWei Liu 197860ce86c7SWei Liu fidp = get_fid(pdu, fid); 197960ce86c7SWei Liu if (fidp == NULL) { 198060ce86c7SWei Liu err = -EINVAL; 198160ce86c7SWei Liu goto out_nofid; 198260ce86c7SWei Liu } 198360ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 198460ce86c7SWei Liu 198560ce86c7SWei Liu if (off == 0) { 198660ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 198760ce86c7SWei Liu } 198860ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 198960ce86c7SWei Liu if (count < 0) { 199060ce86c7SWei Liu err = count; 199160ce86c7SWei Liu goto out; 199260ce86c7SWei Liu } 199360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 199460ce86c7SWei Liu if (err < 0) { 199560ce86c7SWei Liu goto out; 199660ce86c7SWei Liu } 199760ce86c7SWei Liu err += offset + count; 199860ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 199960ce86c7SWei Liu QEMUIOVector qiov_full; 200060ce86c7SWei Liu QEMUIOVector qiov; 200160ce86c7SWei Liu int32_t len; 200260ce86c7SWei Liu 200360ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 200460ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 200560ce86c7SWei Liu do { 200660ce86c7SWei Liu qemu_iovec_reset(&qiov); 200760ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 200860ce86c7SWei Liu if (0) { 200960ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 201060ce86c7SWei Liu } 201160ce86c7SWei Liu /* Loop in case of EINTR */ 201260ce86c7SWei Liu do { 201360ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 201460ce86c7SWei Liu if (len >= 0) { 201560ce86c7SWei Liu off += len; 201660ce86c7SWei Liu count += len; 201760ce86c7SWei Liu } 201860ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 201960ce86c7SWei Liu if (len < 0) { 202060ce86c7SWei Liu /* IO error return the error */ 202160ce86c7SWei Liu err = len; 2022e95c9a49SLi Qiang goto out_free_iovec; 202360ce86c7SWei Liu } 202460ce86c7SWei Liu } while (count < max_count && len > 0); 202560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 202660ce86c7SWei Liu if (err < 0) { 2027e95c9a49SLi Qiang goto out_free_iovec; 202860ce86c7SWei Liu } 202960ce86c7SWei Liu err += offset + count; 2030e95c9a49SLi Qiang out_free_iovec: 203160ce86c7SWei Liu qemu_iovec_destroy(&qiov); 203260ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 203360ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 203460ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 203560ce86c7SWei Liu } else { 203660ce86c7SWei Liu err = -EINVAL; 203760ce86c7SWei Liu } 203860ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 203960ce86c7SWei Liu out: 204060ce86c7SWei Liu put_fid(pdu, fidp); 204160ce86c7SWei Liu out_nofid: 204260ce86c7SWei Liu pdu_complete(pdu, err); 204360ce86c7SWei Liu } 204460ce86c7SWei Liu 204560ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 204660ce86c7SWei Liu { 204760ce86c7SWei Liu /* 204860ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 204960ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 205060ce86c7SWei Liu */ 205160ce86c7SWei Liu return 24 + v9fs_string_size(name); 205260ce86c7SWei Liu } 205360ce86c7SWei Liu 20548440e22eSGreg Kurz static int coroutine_fn v9fs_do_readdir(V9fsPDU *pdu, V9fsFidState *fidp, 20558440e22eSGreg Kurz int32_t max_count) 205660ce86c7SWei Liu { 205760ce86c7SWei Liu size_t size; 205860ce86c7SWei Liu V9fsQID qid; 205960ce86c7SWei Liu V9fsString name; 206060ce86c7SWei Liu int len, err = 0; 206160ce86c7SWei Liu int32_t count = 0; 206260ce86c7SWei Liu off_t saved_dir_pos; 2063635324e8SGreg Kurz struct dirent *dent; 206460ce86c7SWei Liu 206560ce86c7SWei Liu /* save the directory position */ 206660ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 206760ce86c7SWei Liu if (saved_dir_pos < 0) { 206860ce86c7SWei Liu return saved_dir_pos; 206960ce86c7SWei Liu } 207060ce86c7SWei Liu 207160ce86c7SWei Liu while (1) { 20727cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 20737cde47d4SGreg Kurz 2074635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 2075635324e8SGreg Kurz if (err || !dent) { 207660ce86c7SWei Liu break; 207760ce86c7SWei Liu } 207860ce86c7SWei Liu v9fs_string_init(&name); 207960ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 208060ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 20817cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 20827cde47d4SGreg Kurz 208360ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 208460ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 208560ce86c7SWei Liu v9fs_string_free(&name); 208660ce86c7SWei Liu return count; 208760ce86c7SWei Liu } 2088*1a6ed33cSAntonios Motakis 2089*1a6ed33cSAntonios Motakis if (pdu->s->ctx.export_flags & V9FS_REMAP_INODES) { 2090*1a6ed33cSAntonios Motakis /* 2091*1a6ed33cSAntonios Motakis * dirent_to_qid() implies expensive stat call for each entry, 2092*1a6ed33cSAntonios Motakis * we must do that here though since inode remapping requires 2093*1a6ed33cSAntonios Motakis * the device id, which in turn might be different for 2094*1a6ed33cSAntonios Motakis * different entries; we cannot make any assumption to avoid 2095*1a6ed33cSAntonios Motakis * that here. 2096*1a6ed33cSAntonios Motakis */ 2097*1a6ed33cSAntonios Motakis err = dirent_to_qid(pdu, fidp, dent, &qid); 2098*1a6ed33cSAntonios Motakis if (err < 0) { 2099*1a6ed33cSAntonios Motakis v9fs_readdir_unlock(&fidp->fs.dir); 2100*1a6ed33cSAntonios Motakis v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 2101*1a6ed33cSAntonios Motakis v9fs_string_free(&name); 2102*1a6ed33cSAntonios Motakis return err; 2103*1a6ed33cSAntonios Motakis } 2104*1a6ed33cSAntonios Motakis } else { 210560ce86c7SWei Liu /* 210660ce86c7SWei Liu * Fill up just the path field of qid because the client uses 210760ce86c7SWei Liu * only that. To fill the entire qid structure we will have 2108*1a6ed33cSAntonios Motakis * to stat each dirent found, which is expensive. For the 2109*1a6ed33cSAntonios Motakis * latter reason we don't call dirent_to_qid() here. Only drawback 2110*1a6ed33cSAntonios Motakis * is that no multi-device export detection of stat_to_qid() 2111*1a6ed33cSAntonios Motakis * would be done and provided as error to the user here. But 2112*1a6ed33cSAntonios Motakis * user would get that error anyway when accessing those 2113*1a6ed33cSAntonios Motakis * files/dirs through other ways. 211460ce86c7SWei Liu */ 211560ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 211660ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 211760ce86c7SWei Liu /* Fill the other fields with dummy values */ 211860ce86c7SWei Liu qid.type = 0; 211960ce86c7SWei Liu qid.version = 0; 2120*1a6ed33cSAntonios Motakis } 212160ce86c7SWei Liu 212260ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 212360ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 212460ce86c7SWei Liu &qid, dent->d_off, 212560ce86c7SWei Liu dent->d_type, &name); 21267cde47d4SGreg Kurz 21277cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 21287cde47d4SGreg Kurz 212960ce86c7SWei Liu if (len < 0) { 213060ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 213160ce86c7SWei Liu v9fs_string_free(&name); 213260ce86c7SWei Liu return len; 213360ce86c7SWei Liu } 213460ce86c7SWei Liu count += len; 213560ce86c7SWei Liu v9fs_string_free(&name); 213660ce86c7SWei Liu saved_dir_pos = dent->d_off; 213760ce86c7SWei Liu } 21387cde47d4SGreg Kurz 21397cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 21407cde47d4SGreg Kurz 214160ce86c7SWei Liu if (err < 0) { 214260ce86c7SWei Liu return err; 214360ce86c7SWei Liu } 214460ce86c7SWei Liu return count; 214560ce86c7SWei Liu } 214660ce86c7SWei Liu 21478440e22eSGreg Kurz static void coroutine_fn v9fs_readdir(void *opaque) 214860ce86c7SWei Liu { 214960ce86c7SWei Liu int32_t fid; 215060ce86c7SWei Liu V9fsFidState *fidp; 215160ce86c7SWei Liu ssize_t retval = 0; 215260ce86c7SWei Liu size_t offset = 7; 215360ce86c7SWei Liu uint64_t initial_offset; 215460ce86c7SWei Liu int32_t count; 215560ce86c7SWei Liu uint32_t max_count; 215660ce86c7SWei Liu V9fsPDU *pdu = opaque; 215760ce86c7SWei Liu 215860ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 215960ce86c7SWei Liu &initial_offset, &max_count); 216060ce86c7SWei Liu if (retval < 0) { 216160ce86c7SWei Liu goto out_nofid; 216260ce86c7SWei Liu } 216360ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 216460ce86c7SWei Liu 216560ce86c7SWei Liu fidp = get_fid(pdu, fid); 216660ce86c7SWei Liu if (fidp == NULL) { 216760ce86c7SWei Liu retval = -EINVAL; 216860ce86c7SWei Liu goto out_nofid; 216960ce86c7SWei Liu } 2170f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 217160ce86c7SWei Liu retval = -EINVAL; 217260ce86c7SWei Liu goto out; 217360ce86c7SWei Liu } 217460ce86c7SWei Liu if (initial_offset == 0) { 217560ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 217660ce86c7SWei Liu } else { 217760ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 217860ce86c7SWei Liu } 217960ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 218060ce86c7SWei Liu if (count < 0) { 218160ce86c7SWei Liu retval = count; 218260ce86c7SWei Liu goto out; 218360ce86c7SWei Liu } 218460ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 218560ce86c7SWei Liu if (retval < 0) { 218660ce86c7SWei Liu goto out; 218760ce86c7SWei Liu } 218860ce86c7SWei Liu retval += count + offset; 218960ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 219060ce86c7SWei Liu out: 219160ce86c7SWei Liu put_fid(pdu, fidp); 219260ce86c7SWei Liu out_nofid: 219360ce86c7SWei Liu pdu_complete(pdu, retval); 219460ce86c7SWei Liu } 219560ce86c7SWei Liu 219660ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 219760ce86c7SWei Liu uint64_t off, uint32_t count, 219860ce86c7SWei Liu struct iovec *sg, int cnt) 219960ce86c7SWei Liu { 220060ce86c7SWei Liu int i, to_copy; 220160ce86c7SWei Liu ssize_t err = 0; 22027e55d65cSLi Qiang uint64_t write_count; 220360ce86c7SWei Liu size_t offset = 7; 220460ce86c7SWei Liu 220560ce86c7SWei Liu 22067e55d65cSLi Qiang if (fidp->fs.xattr.len < off) { 220760ce86c7SWei Liu err = -ENOSPC; 220860ce86c7SWei Liu goto out; 220960ce86c7SWei Liu } 22107e55d65cSLi Qiang write_count = fidp->fs.xattr.len - off; 22117e55d65cSLi Qiang if (write_count > count) { 22127e55d65cSLi Qiang write_count = count; 22137e55d65cSLi Qiang } 221460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 221560ce86c7SWei Liu if (err < 0) { 221660ce86c7SWei Liu return err; 221760ce86c7SWei Liu } 221860ce86c7SWei Liu err += offset; 221960ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 222060ce86c7SWei Liu /* 222160ce86c7SWei Liu * Now copy the content from sg list 222260ce86c7SWei Liu */ 222360ce86c7SWei Liu for (i = 0; i < cnt; i++) { 222460ce86c7SWei Liu if (write_count > sg[i].iov_len) { 222560ce86c7SWei Liu to_copy = sg[i].iov_len; 222660ce86c7SWei Liu } else { 222760ce86c7SWei Liu to_copy = write_count; 222860ce86c7SWei Liu } 222960ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 223060ce86c7SWei Liu /* updating vs->off since we are not using below */ 223160ce86c7SWei Liu off += to_copy; 223260ce86c7SWei Liu write_count -= to_copy; 223360ce86c7SWei Liu } 223460ce86c7SWei Liu out: 223560ce86c7SWei Liu return err; 223660ce86c7SWei Liu } 223760ce86c7SWei Liu 22388440e22eSGreg Kurz static void coroutine_fn v9fs_write(void *opaque) 223960ce86c7SWei Liu { 224060ce86c7SWei Liu ssize_t err; 224160ce86c7SWei Liu int32_t fid; 224260ce86c7SWei Liu uint64_t off; 224360ce86c7SWei Liu uint32_t count; 224460ce86c7SWei Liu int32_t len = 0; 224560ce86c7SWei Liu int32_t total = 0; 224660ce86c7SWei Liu size_t offset = 7; 224760ce86c7SWei Liu V9fsFidState *fidp; 224860ce86c7SWei Liu V9fsPDU *pdu = opaque; 224960ce86c7SWei Liu V9fsState *s = pdu->s; 225060ce86c7SWei Liu QEMUIOVector qiov_full; 225160ce86c7SWei Liu QEMUIOVector qiov; 225260ce86c7SWei Liu 225360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 225460ce86c7SWei Liu if (err < 0) { 225560ce86c7SWei Liu pdu_complete(pdu, err); 225660ce86c7SWei Liu return; 225760ce86c7SWei Liu } 225860ce86c7SWei Liu offset += err; 225960ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 226060ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 226160ce86c7SWei Liu 226260ce86c7SWei Liu fidp = get_fid(pdu, fid); 226360ce86c7SWei Liu if (fidp == NULL) { 226460ce86c7SWei Liu err = -EINVAL; 226560ce86c7SWei Liu goto out_nofid; 226660ce86c7SWei Liu } 226760ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 226860ce86c7SWei Liu if (fidp->fs.fd == -1) { 226960ce86c7SWei Liu err = -EINVAL; 227060ce86c7SWei Liu goto out; 227160ce86c7SWei Liu } 227260ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 227360ce86c7SWei Liu /* 227460ce86c7SWei Liu * setxattr operation 227560ce86c7SWei Liu */ 227660ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 227760ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 227860ce86c7SWei Liu goto out; 227960ce86c7SWei Liu } else { 228060ce86c7SWei Liu err = -EINVAL; 228160ce86c7SWei Liu goto out; 228260ce86c7SWei Liu } 228360ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 228460ce86c7SWei Liu do { 228560ce86c7SWei Liu qemu_iovec_reset(&qiov); 228660ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 228760ce86c7SWei Liu if (0) { 228860ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 228960ce86c7SWei Liu } 229060ce86c7SWei Liu /* Loop in case of EINTR */ 229160ce86c7SWei Liu do { 229260ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 229360ce86c7SWei Liu if (len >= 0) { 229460ce86c7SWei Liu off += len; 229560ce86c7SWei Liu total += len; 229660ce86c7SWei Liu } 229760ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 229860ce86c7SWei Liu if (len < 0) { 229960ce86c7SWei Liu /* IO error return the error */ 230060ce86c7SWei Liu err = len; 230160ce86c7SWei Liu goto out_qiov; 230260ce86c7SWei Liu } 230360ce86c7SWei Liu } while (total < count && len > 0); 230460ce86c7SWei Liu 230560ce86c7SWei Liu offset = 7; 230660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 230760ce86c7SWei Liu if (err < 0) { 2308fdfcc9aeSLi Qiang goto out_qiov; 230960ce86c7SWei Liu } 231060ce86c7SWei Liu err += offset; 231160ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 231260ce86c7SWei Liu out_qiov: 231360ce86c7SWei Liu qemu_iovec_destroy(&qiov); 231460ce86c7SWei Liu out: 231560ce86c7SWei Liu put_fid(pdu, fidp); 231660ce86c7SWei Liu out_nofid: 231760ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 231860ce86c7SWei Liu pdu_complete(pdu, err); 231960ce86c7SWei Liu } 232060ce86c7SWei Liu 23218440e22eSGreg Kurz static void coroutine_fn v9fs_create(void *opaque) 232260ce86c7SWei Liu { 232360ce86c7SWei Liu int32_t fid; 232460ce86c7SWei Liu int err = 0; 232560ce86c7SWei Liu size_t offset = 7; 232660ce86c7SWei Liu V9fsFidState *fidp; 232760ce86c7SWei Liu V9fsQID qid; 232860ce86c7SWei Liu int32_t perm; 232960ce86c7SWei Liu int8_t mode; 233060ce86c7SWei Liu V9fsPath path; 233160ce86c7SWei Liu struct stat stbuf; 233260ce86c7SWei Liu V9fsString name; 233360ce86c7SWei Liu V9fsString extension; 233460ce86c7SWei Liu int iounit; 233560ce86c7SWei Liu V9fsPDU *pdu = opaque; 23365b3c77aaSGreg Kurz V9fsState *s = pdu->s; 233760ce86c7SWei Liu 233860ce86c7SWei Liu v9fs_path_init(&path); 233960ce86c7SWei Liu v9fs_string_init(&name); 234060ce86c7SWei Liu v9fs_string_init(&extension); 234160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 234260ce86c7SWei Liu &perm, &mode, &extension); 234360ce86c7SWei Liu if (err < 0) { 234460ce86c7SWei Liu goto out_nofid; 234560ce86c7SWei Liu } 234660ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 234760ce86c7SWei Liu 2348fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2349fff39a7aSGreg Kurz err = -ENOENT; 2350fff39a7aSGreg Kurz goto out_nofid; 2351fff39a7aSGreg Kurz } 2352fff39a7aSGreg Kurz 2353805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2354805b5d98SGreg Kurz err = -EEXIST; 2355805b5d98SGreg Kurz goto out_nofid; 2356805b5d98SGreg Kurz } 2357805b5d98SGreg Kurz 235860ce86c7SWei Liu fidp = get_fid(pdu, fid); 235960ce86c7SWei Liu if (fidp == NULL) { 236060ce86c7SWei Liu err = -EINVAL; 236160ce86c7SWei Liu goto out_nofid; 236260ce86c7SWei Liu } 2363d63fb193SLi Qiang if (fidp->fid_type != P9_FID_NONE) { 2364d63fb193SLi Qiang err = -EINVAL; 2365d63fb193SLi Qiang goto out; 2366d63fb193SLi Qiang } 236760ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 236860ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 236960ce86c7SWei Liu fidp->uid, -1, &stbuf); 237060ce86c7SWei Liu if (err < 0) { 237160ce86c7SWei Liu goto out; 237260ce86c7SWei Liu } 237360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 237460ce86c7SWei Liu if (err < 0) { 237560ce86c7SWei Liu goto out; 237660ce86c7SWei Liu } 23775b3c77aaSGreg Kurz v9fs_path_write_lock(s); 237860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23795b3c77aaSGreg Kurz v9fs_path_unlock(s); 238060ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 238160ce86c7SWei Liu if (err < 0) { 238260ce86c7SWei Liu goto out; 238360ce86c7SWei Liu } 238460ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 238560ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 238660ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 238760ce86c7SWei Liu extension.data, -1 , &stbuf); 238860ce86c7SWei Liu if (err < 0) { 238960ce86c7SWei Liu goto out; 239060ce86c7SWei Liu } 239160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 239260ce86c7SWei Liu if (err < 0) { 239360ce86c7SWei Liu goto out; 239460ce86c7SWei Liu } 23955b3c77aaSGreg Kurz v9fs_path_write_lock(s); 239660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 23975b3c77aaSGreg Kurz v9fs_path_unlock(s); 239860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 239960ce86c7SWei Liu int32_t ofid = atoi(extension.data); 240060ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 240160ce86c7SWei Liu if (ofidp == NULL) { 240260ce86c7SWei Liu err = -EINVAL; 240360ce86c7SWei Liu goto out; 240460ce86c7SWei Liu } 240560ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 240660ce86c7SWei Liu put_fid(pdu, ofidp); 240760ce86c7SWei Liu if (err < 0) { 240860ce86c7SWei Liu goto out; 240960ce86c7SWei Liu } 241060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 241160ce86c7SWei Liu if (err < 0) { 241260ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 241360ce86c7SWei Liu goto out; 241460ce86c7SWei Liu } 24155b3c77aaSGreg Kurz v9fs_path_write_lock(s); 241660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 24175b3c77aaSGreg Kurz v9fs_path_unlock(s); 241860ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 241960ce86c7SWei Liu if (err < 0) { 242060ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 242160ce86c7SWei Liu goto out; 242260ce86c7SWei Liu } 242360ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 242460ce86c7SWei Liu char ctype; 242560ce86c7SWei Liu uint32_t major, minor; 242660ce86c7SWei Liu mode_t nmode = 0; 242760ce86c7SWei Liu 242860ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 242960ce86c7SWei Liu err = -errno; 243060ce86c7SWei Liu goto out; 243160ce86c7SWei Liu } 243260ce86c7SWei Liu 243360ce86c7SWei Liu switch (ctype) { 243460ce86c7SWei Liu case 'c': 243560ce86c7SWei Liu nmode = S_IFCHR; 243660ce86c7SWei Liu break; 243760ce86c7SWei Liu case 'b': 243860ce86c7SWei Liu nmode = S_IFBLK; 243960ce86c7SWei Liu break; 244060ce86c7SWei Liu default: 244160ce86c7SWei Liu err = -EIO; 244260ce86c7SWei Liu goto out; 244360ce86c7SWei Liu } 244460ce86c7SWei Liu 244560ce86c7SWei Liu nmode |= perm & 0777; 244660ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 244760ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 244860ce86c7SWei Liu if (err < 0) { 244960ce86c7SWei Liu goto out; 245060ce86c7SWei Liu } 245160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 245260ce86c7SWei Liu if (err < 0) { 245360ce86c7SWei Liu goto out; 245460ce86c7SWei Liu } 24555b3c77aaSGreg Kurz v9fs_path_write_lock(s); 245660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 24575b3c77aaSGreg Kurz v9fs_path_unlock(s); 245860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 245960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 246060ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 246160ce86c7SWei Liu if (err < 0) { 246260ce86c7SWei Liu goto out; 246360ce86c7SWei Liu } 246460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 246560ce86c7SWei Liu if (err < 0) { 246660ce86c7SWei Liu goto out; 246760ce86c7SWei Liu } 24685b3c77aaSGreg Kurz v9fs_path_write_lock(s); 246960ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 24705b3c77aaSGreg Kurz v9fs_path_unlock(s); 247160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 247260ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 247360ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 247460ce86c7SWei Liu if (err < 0) { 247560ce86c7SWei Liu goto out; 247660ce86c7SWei Liu } 247760ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 247860ce86c7SWei Liu if (err < 0) { 247960ce86c7SWei Liu goto out; 248060ce86c7SWei Liu } 24815b3c77aaSGreg Kurz v9fs_path_write_lock(s); 248260ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 24835b3c77aaSGreg Kurz v9fs_path_unlock(s); 248460ce86c7SWei Liu } else { 248560ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 248660ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 248760ce86c7SWei Liu if (err < 0) { 248860ce86c7SWei Liu goto out; 248960ce86c7SWei Liu } 249060ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 249160ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 249260ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 249360ce86c7SWei Liu /* 249460ce86c7SWei Liu * We let the host file system do O_EXCL check 249560ce86c7SWei Liu * We should not reclaim such fd 249660ce86c7SWei Liu */ 249760ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 249860ce86c7SWei Liu } 249960ce86c7SWei Liu } 250060ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 25013b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 25023b5ee9e8SAntonios Motakis if (err < 0) { 25033b5ee9e8SAntonios Motakis goto out; 25043b5ee9e8SAntonios Motakis } 250560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 250660ce86c7SWei Liu if (err < 0) { 250760ce86c7SWei Liu goto out; 250860ce86c7SWei Liu } 250960ce86c7SWei Liu err += offset; 251060ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 251160ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 251260ce86c7SWei Liu out: 251360ce86c7SWei Liu put_fid(pdu, fidp); 251460ce86c7SWei Liu out_nofid: 251560ce86c7SWei Liu pdu_complete(pdu, err); 251660ce86c7SWei Liu v9fs_string_free(&name); 251760ce86c7SWei Liu v9fs_string_free(&extension); 251860ce86c7SWei Liu v9fs_path_free(&path); 251960ce86c7SWei Liu } 252060ce86c7SWei Liu 25218440e22eSGreg Kurz static void coroutine_fn v9fs_symlink(void *opaque) 252260ce86c7SWei Liu { 252360ce86c7SWei Liu V9fsPDU *pdu = opaque; 252460ce86c7SWei Liu V9fsString name; 252560ce86c7SWei Liu V9fsString symname; 252660ce86c7SWei Liu V9fsFidState *dfidp; 252760ce86c7SWei Liu V9fsQID qid; 252860ce86c7SWei Liu struct stat stbuf; 252960ce86c7SWei Liu int32_t dfid; 253060ce86c7SWei Liu int err = 0; 253160ce86c7SWei Liu gid_t gid; 253260ce86c7SWei Liu size_t offset = 7; 253360ce86c7SWei Liu 253460ce86c7SWei Liu v9fs_string_init(&name); 253560ce86c7SWei Liu v9fs_string_init(&symname); 253660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 253760ce86c7SWei Liu if (err < 0) { 253860ce86c7SWei Liu goto out_nofid; 253960ce86c7SWei Liu } 254060ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 254160ce86c7SWei Liu 2542fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2543fff39a7aSGreg Kurz err = -ENOENT; 2544fff39a7aSGreg Kurz goto out_nofid; 2545fff39a7aSGreg Kurz } 2546fff39a7aSGreg Kurz 2547805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2548805b5d98SGreg Kurz err = -EEXIST; 2549805b5d98SGreg Kurz goto out_nofid; 2550805b5d98SGreg Kurz } 2551805b5d98SGreg Kurz 255260ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 255360ce86c7SWei Liu if (dfidp == NULL) { 255460ce86c7SWei Liu err = -EINVAL; 255560ce86c7SWei Liu goto out_nofid; 255660ce86c7SWei Liu } 255760ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 255860ce86c7SWei Liu if (err < 0) { 255960ce86c7SWei Liu goto out; 256060ce86c7SWei Liu } 25613b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 25623b5ee9e8SAntonios Motakis if (err < 0) { 25633b5ee9e8SAntonios Motakis goto out; 25643b5ee9e8SAntonios Motakis } 256560ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 256660ce86c7SWei Liu if (err < 0) { 256760ce86c7SWei Liu goto out; 256860ce86c7SWei Liu } 256960ce86c7SWei Liu err += offset; 257060ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 257160ce86c7SWei Liu qid.type, qid.version, qid.path); 257260ce86c7SWei Liu out: 257360ce86c7SWei Liu put_fid(pdu, dfidp); 257460ce86c7SWei Liu out_nofid: 257560ce86c7SWei Liu pdu_complete(pdu, err); 257660ce86c7SWei Liu v9fs_string_free(&name); 257760ce86c7SWei Liu v9fs_string_free(&symname); 257860ce86c7SWei Liu } 257960ce86c7SWei Liu 2580a1bf8b74SGreg Kurz static void coroutine_fn v9fs_flush(void *opaque) 258160ce86c7SWei Liu { 258260ce86c7SWei Liu ssize_t err; 258360ce86c7SWei Liu int16_t tag; 258460ce86c7SWei Liu size_t offset = 7; 2585d5f2af7bSGreg Kurz V9fsPDU *cancel_pdu = NULL; 258660ce86c7SWei Liu V9fsPDU *pdu = opaque; 258760ce86c7SWei Liu V9fsState *s = pdu->s; 258860ce86c7SWei Liu 258960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 259060ce86c7SWei Liu if (err < 0) { 259160ce86c7SWei Liu pdu_complete(pdu, err); 259260ce86c7SWei Liu return; 259360ce86c7SWei Liu } 259460ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 259560ce86c7SWei Liu 2596d5f2af7bSGreg Kurz if (pdu->tag == tag) { 25973dc6f869SAlistair Francis warn_report("the guest sent a self-referencing 9P flush request"); 2598d5f2af7bSGreg Kurz } else { 259960ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 260060ce86c7SWei Liu if (cancel_pdu->tag == tag) { 260160ce86c7SWei Liu break; 260260ce86c7SWei Liu } 260360ce86c7SWei Liu } 2604d5f2af7bSGreg Kurz } 260560ce86c7SWei Liu if (cancel_pdu) { 260660ce86c7SWei Liu cancel_pdu->cancelled = 1; 260760ce86c7SWei Liu /* 260860ce86c7SWei Liu * Wait for pdu to complete. 260960ce86c7SWei Liu */ 26101ace7ceaSPaolo Bonzini qemu_co_queue_wait(&cancel_pdu->complete, NULL); 261118adde86SGreg Kurz if (!qemu_co_queue_next(&cancel_pdu->complete)) { 261260ce86c7SWei Liu cancel_pdu->cancelled = 0; 261360ce86c7SWei Liu pdu_free(cancel_pdu); 261460ce86c7SWei Liu } 261518adde86SGreg Kurz } 261660ce86c7SWei Liu pdu_complete(pdu, 7); 261760ce86c7SWei Liu } 261860ce86c7SWei Liu 26198440e22eSGreg Kurz static void coroutine_fn v9fs_link(void *opaque) 262060ce86c7SWei Liu { 262160ce86c7SWei Liu V9fsPDU *pdu = opaque; 262260ce86c7SWei Liu int32_t dfid, oldfid; 262360ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 262460ce86c7SWei Liu V9fsString name; 262560ce86c7SWei Liu size_t offset = 7; 262660ce86c7SWei Liu int err = 0; 262760ce86c7SWei Liu 262860ce86c7SWei Liu v9fs_string_init(&name); 262960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 263060ce86c7SWei Liu if (err < 0) { 263160ce86c7SWei Liu goto out_nofid; 263260ce86c7SWei Liu } 263360ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 263460ce86c7SWei Liu 2635fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2636fff39a7aSGreg Kurz err = -ENOENT; 2637fff39a7aSGreg Kurz goto out_nofid; 2638fff39a7aSGreg Kurz } 2639fff39a7aSGreg Kurz 2640805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2641805b5d98SGreg Kurz err = -EEXIST; 2642805b5d98SGreg Kurz goto out_nofid; 2643805b5d98SGreg Kurz } 2644805b5d98SGreg Kurz 264560ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 264660ce86c7SWei Liu if (dfidp == NULL) { 264760ce86c7SWei Liu err = -ENOENT; 264860ce86c7SWei Liu goto out_nofid; 264960ce86c7SWei Liu } 265060ce86c7SWei Liu 265160ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 265260ce86c7SWei Liu if (oldfidp == NULL) { 265360ce86c7SWei Liu err = -ENOENT; 265460ce86c7SWei Liu goto out; 265560ce86c7SWei Liu } 265660ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 265760ce86c7SWei Liu if (!err) { 265860ce86c7SWei Liu err = offset; 265960ce86c7SWei Liu } 26604c158678SLi Qiang put_fid(pdu, oldfidp); 266160ce86c7SWei Liu out: 266260ce86c7SWei Liu put_fid(pdu, dfidp); 266360ce86c7SWei Liu out_nofid: 266460ce86c7SWei Liu v9fs_string_free(&name); 266560ce86c7SWei Liu pdu_complete(pdu, err); 266660ce86c7SWei Liu } 266760ce86c7SWei Liu 266860ce86c7SWei Liu /* Only works with path name based fid */ 26698440e22eSGreg Kurz static void coroutine_fn v9fs_remove(void *opaque) 267060ce86c7SWei Liu { 267160ce86c7SWei Liu int32_t fid; 267260ce86c7SWei Liu int err = 0; 267360ce86c7SWei Liu size_t offset = 7; 267460ce86c7SWei Liu V9fsFidState *fidp; 267560ce86c7SWei Liu V9fsPDU *pdu = opaque; 267660ce86c7SWei Liu 267760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 267860ce86c7SWei Liu if (err < 0) { 267960ce86c7SWei Liu goto out_nofid; 268060ce86c7SWei Liu } 268160ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 268260ce86c7SWei Liu 268360ce86c7SWei Liu fidp = get_fid(pdu, fid); 268460ce86c7SWei Liu if (fidp == NULL) { 268560ce86c7SWei Liu err = -EINVAL; 268660ce86c7SWei Liu goto out_nofid; 268760ce86c7SWei Liu } 268860ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 268960ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 269060ce86c7SWei Liu err = -EOPNOTSUPP; 269160ce86c7SWei Liu goto out_err; 269260ce86c7SWei Liu } 269360ce86c7SWei Liu /* 269460ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 269560ce86c7SWei Liu * the file later. So don't reclaim fd 269660ce86c7SWei Liu */ 269760ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 269860ce86c7SWei Liu if (err < 0) { 269960ce86c7SWei Liu goto out_err; 270060ce86c7SWei Liu } 270160ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 270260ce86c7SWei Liu if (!err) { 270360ce86c7SWei Liu err = offset; 270460ce86c7SWei Liu } 270560ce86c7SWei Liu out_err: 270660ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 270760ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 270860ce86c7SWei Liu put_fid(pdu, fidp); 270960ce86c7SWei Liu out_nofid: 271060ce86c7SWei Liu pdu_complete(pdu, err); 271160ce86c7SWei Liu } 271260ce86c7SWei Liu 27138440e22eSGreg Kurz static void coroutine_fn v9fs_unlinkat(void *opaque) 271460ce86c7SWei Liu { 271560ce86c7SWei Liu int err = 0; 271660ce86c7SWei Liu V9fsString name; 271767e87345SKeno Fischer int32_t dfid, flags, rflags = 0; 271860ce86c7SWei Liu size_t offset = 7; 271960ce86c7SWei Liu V9fsPath path; 272060ce86c7SWei Liu V9fsFidState *dfidp; 272160ce86c7SWei Liu V9fsPDU *pdu = opaque; 272260ce86c7SWei Liu 272360ce86c7SWei Liu v9fs_string_init(&name); 272460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 272560ce86c7SWei Liu if (err < 0) { 272660ce86c7SWei Liu goto out_nofid; 272760ce86c7SWei Liu } 2728fff39a7aSGreg Kurz 2729fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2730fff39a7aSGreg Kurz err = -ENOENT; 2731fff39a7aSGreg Kurz goto out_nofid; 2732fff39a7aSGreg Kurz } 2733fff39a7aSGreg Kurz 2734805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2735805b5d98SGreg Kurz err = -EINVAL; 2736805b5d98SGreg Kurz goto out_nofid; 2737805b5d98SGreg Kurz } 2738805b5d98SGreg Kurz 2739805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2740805b5d98SGreg Kurz err = -ENOTEMPTY; 2741805b5d98SGreg Kurz goto out_nofid; 2742805b5d98SGreg Kurz } 2743805b5d98SGreg Kurz 274467e87345SKeno Fischer if (flags & ~P9_DOTL_AT_REMOVEDIR) { 274567e87345SKeno Fischer err = -EINVAL; 274667e87345SKeno Fischer goto out_nofid; 274767e87345SKeno Fischer } 274867e87345SKeno Fischer 274967e87345SKeno Fischer if (flags & P9_DOTL_AT_REMOVEDIR) { 275067e87345SKeno Fischer rflags |= AT_REMOVEDIR; 275167e87345SKeno Fischer } 275267e87345SKeno Fischer 275360ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 275460ce86c7SWei Liu if (dfidp == NULL) { 275560ce86c7SWei Liu err = -EINVAL; 275660ce86c7SWei Liu goto out_nofid; 275760ce86c7SWei Liu } 275860ce86c7SWei Liu /* 275960ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 276060ce86c7SWei Liu * the file later. So don't reclaim fd 276160ce86c7SWei Liu */ 276260ce86c7SWei Liu v9fs_path_init(&path); 276360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 276460ce86c7SWei Liu if (err < 0) { 276560ce86c7SWei Liu goto out_err; 276660ce86c7SWei Liu } 276760ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 276860ce86c7SWei Liu if (err < 0) { 276960ce86c7SWei Liu goto out_err; 277060ce86c7SWei Liu } 277167e87345SKeno Fischer err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, rflags); 277260ce86c7SWei Liu if (!err) { 277360ce86c7SWei Liu err = offset; 277460ce86c7SWei Liu } 277560ce86c7SWei Liu out_err: 277660ce86c7SWei Liu put_fid(pdu, dfidp); 277760ce86c7SWei Liu v9fs_path_free(&path); 277860ce86c7SWei Liu out_nofid: 277960ce86c7SWei Liu pdu_complete(pdu, err); 278060ce86c7SWei Liu v9fs_string_free(&name); 278160ce86c7SWei Liu } 278260ce86c7SWei Liu 278360ce86c7SWei Liu 278460ce86c7SWei Liu /* Only works with path name based fid */ 27858440e22eSGreg Kurz static int coroutine_fn v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 27868440e22eSGreg Kurz int32_t newdirfid, 27878440e22eSGreg Kurz V9fsString *name) 278860ce86c7SWei Liu { 278960ce86c7SWei Liu int err = 0; 279060ce86c7SWei Liu V9fsPath new_path; 279160ce86c7SWei Liu V9fsFidState *tfidp; 279260ce86c7SWei Liu V9fsState *s = pdu->s; 279360ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 279460ce86c7SWei Liu 279560ce86c7SWei Liu v9fs_path_init(&new_path); 279660ce86c7SWei Liu if (newdirfid != -1) { 279760ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 279860ce86c7SWei Liu if (dirfidp == NULL) { 279960ce86c7SWei Liu err = -ENOENT; 280060ce86c7SWei Liu goto out_nofid; 280160ce86c7SWei Liu } 280249dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 280349dd946bSGreg Kurz err = -EINVAL; 280449dd946bSGreg Kurz goto out; 280549dd946bSGreg Kurz } 28064fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 28074fa62005SGreg Kurz if (err < 0) { 28084fa62005SGreg Kurz goto out; 28094fa62005SGreg Kurz } 281060ce86c7SWei Liu } else { 28114d8bc733SJan Dakinevich char *dir_name = g_path_get_dirname(fidp->path.data); 28124d8bc733SJan Dakinevich V9fsPath dir_path; 28134d8bc733SJan Dakinevich 28144d8bc733SJan Dakinevich v9fs_path_init(&dir_path); 28154d8bc733SJan Dakinevich v9fs_path_sprintf(&dir_path, "%s", dir_name); 28164d8bc733SJan Dakinevich g_free(dir_name); 28174d8bc733SJan Dakinevich 28184d8bc733SJan Dakinevich err = v9fs_co_name_to_path(pdu, &dir_path, name->data, &new_path); 28194d8bc733SJan Dakinevich v9fs_path_free(&dir_path); 28204fa62005SGreg Kurz if (err < 0) { 28214fa62005SGreg Kurz goto out; 28224fa62005SGreg Kurz } 282360ce86c7SWei Liu } 282460ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 282560ce86c7SWei Liu if (err < 0) { 282660ce86c7SWei Liu goto out; 282760ce86c7SWei Liu } 282860ce86c7SWei Liu /* 282960ce86c7SWei Liu * Fixup fid's pointing to the old name to 283060ce86c7SWei Liu * start pointing to the new name 283160ce86c7SWei Liu */ 283260ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 283360ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 283460ce86c7SWei Liu /* replace the name */ 283560ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 283660ce86c7SWei Liu } 283760ce86c7SWei Liu } 283860ce86c7SWei Liu out: 283960ce86c7SWei Liu if (dirfidp) { 284060ce86c7SWei Liu put_fid(pdu, dirfidp); 284160ce86c7SWei Liu } 284260ce86c7SWei Liu v9fs_path_free(&new_path); 284360ce86c7SWei Liu out_nofid: 284460ce86c7SWei Liu return err; 284560ce86c7SWei Liu } 284660ce86c7SWei Liu 284760ce86c7SWei Liu /* Only works with path name based fid */ 28488440e22eSGreg Kurz static void coroutine_fn v9fs_rename(void *opaque) 284960ce86c7SWei Liu { 285060ce86c7SWei Liu int32_t fid; 285160ce86c7SWei Liu ssize_t err = 0; 285260ce86c7SWei Liu size_t offset = 7; 285360ce86c7SWei Liu V9fsString name; 285460ce86c7SWei Liu int32_t newdirfid; 285560ce86c7SWei Liu V9fsFidState *fidp; 285660ce86c7SWei Liu V9fsPDU *pdu = opaque; 285760ce86c7SWei Liu V9fsState *s = pdu->s; 285860ce86c7SWei Liu 285960ce86c7SWei Liu v9fs_string_init(&name); 286060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 286160ce86c7SWei Liu if (err < 0) { 286260ce86c7SWei Liu goto out_nofid; 286360ce86c7SWei Liu } 2864fff39a7aSGreg Kurz 2865fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2866fff39a7aSGreg Kurz err = -ENOENT; 2867fff39a7aSGreg Kurz goto out_nofid; 2868fff39a7aSGreg Kurz } 2869fff39a7aSGreg Kurz 2870805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2871805b5d98SGreg Kurz err = -EISDIR; 2872805b5d98SGreg Kurz goto out_nofid; 2873805b5d98SGreg Kurz } 2874805b5d98SGreg Kurz 287560ce86c7SWei Liu fidp = get_fid(pdu, fid); 287660ce86c7SWei Liu if (fidp == NULL) { 287760ce86c7SWei Liu err = -ENOENT; 287860ce86c7SWei Liu goto out_nofid; 287960ce86c7SWei Liu } 288049dd946bSGreg Kurz if (fidp->fid_type != P9_FID_NONE) { 288149dd946bSGreg Kurz err = -EINVAL; 288249dd946bSGreg Kurz goto out; 288349dd946bSGreg Kurz } 288460ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 288560ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 288660ce86c7SWei Liu err = -EOPNOTSUPP; 288760ce86c7SWei Liu goto out; 288860ce86c7SWei Liu } 288960ce86c7SWei Liu v9fs_path_write_lock(s); 289060ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 289160ce86c7SWei Liu v9fs_path_unlock(s); 289260ce86c7SWei Liu if (!err) { 289360ce86c7SWei Liu err = offset; 289460ce86c7SWei Liu } 289560ce86c7SWei Liu out: 289660ce86c7SWei Liu put_fid(pdu, fidp); 289760ce86c7SWei Liu out_nofid: 289860ce86c7SWei Liu pdu_complete(pdu, err); 289960ce86c7SWei Liu v9fs_string_free(&name); 290060ce86c7SWei Liu } 290160ce86c7SWei Liu 29024fa62005SGreg Kurz static int coroutine_fn v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 29038440e22eSGreg Kurz V9fsString *old_name, 29048440e22eSGreg Kurz V9fsPath *newdir, 290560ce86c7SWei Liu V9fsString *new_name) 290660ce86c7SWei Liu { 290760ce86c7SWei Liu V9fsFidState *tfidp; 290860ce86c7SWei Liu V9fsPath oldpath, newpath; 290960ce86c7SWei Liu V9fsState *s = pdu->s; 29104fa62005SGreg Kurz int err; 291160ce86c7SWei Liu 291260ce86c7SWei Liu v9fs_path_init(&oldpath); 291360ce86c7SWei Liu v9fs_path_init(&newpath); 29144fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 29154fa62005SGreg Kurz if (err < 0) { 29164fa62005SGreg Kurz goto out; 29174fa62005SGreg Kurz } 29184fa62005SGreg Kurz err = v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 29194fa62005SGreg Kurz if (err < 0) { 29204fa62005SGreg Kurz goto out; 29214fa62005SGreg Kurz } 292260ce86c7SWei Liu 292360ce86c7SWei Liu /* 292460ce86c7SWei Liu * Fixup fid's pointing to the old name to 292560ce86c7SWei Liu * start pointing to the new name 292660ce86c7SWei Liu */ 292760ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 292860ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 292960ce86c7SWei Liu /* replace the name */ 293060ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 293160ce86c7SWei Liu } 293260ce86c7SWei Liu } 29334fa62005SGreg Kurz out: 293460ce86c7SWei Liu v9fs_path_free(&oldpath); 293560ce86c7SWei Liu v9fs_path_free(&newpath); 29364fa62005SGreg Kurz return err; 293760ce86c7SWei Liu } 293860ce86c7SWei Liu 29398440e22eSGreg Kurz static int coroutine_fn v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 29408440e22eSGreg Kurz V9fsString *old_name, 29418440e22eSGreg Kurz int32_t newdirfid, 294260ce86c7SWei Liu V9fsString *new_name) 294360ce86c7SWei Liu { 294460ce86c7SWei Liu int err = 0; 294560ce86c7SWei Liu V9fsState *s = pdu->s; 294660ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 294760ce86c7SWei Liu 294860ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 294960ce86c7SWei Liu if (olddirfidp == NULL) { 295060ce86c7SWei Liu err = -ENOENT; 295160ce86c7SWei Liu goto out; 295260ce86c7SWei Liu } 295360ce86c7SWei Liu if (newdirfid != -1) { 295460ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 295560ce86c7SWei Liu if (newdirfidp == NULL) { 295660ce86c7SWei Liu err = -ENOENT; 295760ce86c7SWei Liu goto out; 295860ce86c7SWei Liu } 295960ce86c7SWei Liu } else { 296060ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 296160ce86c7SWei Liu } 296260ce86c7SWei Liu 296360ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 296460ce86c7SWei Liu &newdirfidp->path, new_name); 296560ce86c7SWei Liu if (err < 0) { 296660ce86c7SWei Liu goto out; 296760ce86c7SWei Liu } 296860ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 296960ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 29704fa62005SGreg Kurz err = v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 297160ce86c7SWei Liu &newdirfidp->path, new_name); 297260ce86c7SWei Liu } 297360ce86c7SWei Liu out: 297460ce86c7SWei Liu if (olddirfidp) { 297560ce86c7SWei Liu put_fid(pdu, olddirfidp); 297660ce86c7SWei Liu } 297760ce86c7SWei Liu if (newdirfidp) { 297860ce86c7SWei Liu put_fid(pdu, newdirfidp); 297960ce86c7SWei Liu } 298060ce86c7SWei Liu return err; 298160ce86c7SWei Liu } 298260ce86c7SWei Liu 29838440e22eSGreg Kurz static void coroutine_fn v9fs_renameat(void *opaque) 298460ce86c7SWei Liu { 298560ce86c7SWei Liu ssize_t err = 0; 298660ce86c7SWei Liu size_t offset = 7; 298760ce86c7SWei Liu V9fsPDU *pdu = opaque; 298860ce86c7SWei Liu V9fsState *s = pdu->s; 298960ce86c7SWei Liu int32_t olddirfid, newdirfid; 299060ce86c7SWei Liu V9fsString old_name, new_name; 299160ce86c7SWei Liu 299260ce86c7SWei Liu v9fs_string_init(&old_name); 299360ce86c7SWei Liu v9fs_string_init(&new_name); 299460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 299560ce86c7SWei Liu &old_name, &newdirfid, &new_name); 299660ce86c7SWei Liu if (err < 0) { 299760ce86c7SWei Liu goto out_err; 299860ce86c7SWei Liu } 299960ce86c7SWei Liu 3000fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 3001fff39a7aSGreg Kurz err = -ENOENT; 3002fff39a7aSGreg Kurz goto out_err; 3003fff39a7aSGreg Kurz } 3004fff39a7aSGreg Kurz 3005805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 3006805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 3007805b5d98SGreg Kurz err = -EISDIR; 3008805b5d98SGreg Kurz goto out_err; 3009805b5d98SGreg Kurz } 3010805b5d98SGreg Kurz 301160ce86c7SWei Liu v9fs_path_write_lock(s); 301260ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 301360ce86c7SWei Liu &old_name, newdirfid, &new_name); 301460ce86c7SWei Liu v9fs_path_unlock(s); 301560ce86c7SWei Liu if (!err) { 301660ce86c7SWei Liu err = offset; 301760ce86c7SWei Liu } 301860ce86c7SWei Liu 301960ce86c7SWei Liu out_err: 302060ce86c7SWei Liu pdu_complete(pdu, err); 302160ce86c7SWei Liu v9fs_string_free(&old_name); 302260ce86c7SWei Liu v9fs_string_free(&new_name); 302360ce86c7SWei Liu } 302460ce86c7SWei Liu 30258440e22eSGreg Kurz static void coroutine_fn v9fs_wstat(void *opaque) 302660ce86c7SWei Liu { 302760ce86c7SWei Liu int32_t fid; 302860ce86c7SWei Liu int err = 0; 302960ce86c7SWei Liu int16_t unused; 303060ce86c7SWei Liu V9fsStat v9stat; 303160ce86c7SWei Liu size_t offset = 7; 303260ce86c7SWei Liu struct stat stbuf; 303360ce86c7SWei Liu V9fsFidState *fidp; 303460ce86c7SWei Liu V9fsPDU *pdu = opaque; 30351d203986SGreg Kurz V9fsState *s = pdu->s; 303660ce86c7SWei Liu 303760ce86c7SWei Liu v9fs_stat_init(&v9stat); 303860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 303960ce86c7SWei Liu if (err < 0) { 304060ce86c7SWei Liu goto out_nofid; 304160ce86c7SWei Liu } 304260ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 304360ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 304460ce86c7SWei Liu 304560ce86c7SWei Liu fidp = get_fid(pdu, fid); 304660ce86c7SWei Liu if (fidp == NULL) { 304760ce86c7SWei Liu err = -EINVAL; 304860ce86c7SWei Liu goto out_nofid; 304960ce86c7SWei Liu } 305060ce86c7SWei Liu /* do we need to sync the file? */ 305160ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 305260ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 305360ce86c7SWei Liu goto out; 305460ce86c7SWei Liu } 305560ce86c7SWei Liu if (v9stat.mode != -1) { 305660ce86c7SWei Liu uint32_t v9_mode; 305760ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 305860ce86c7SWei Liu if (err < 0) { 305960ce86c7SWei Liu goto out; 306060ce86c7SWei Liu } 306160ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 306260ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 306360ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 306460ce86c7SWei Liu /* Attempting to change the type */ 306560ce86c7SWei Liu err = -EIO; 306660ce86c7SWei Liu goto out; 306760ce86c7SWei Liu } 306860ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 306960ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 307060ce86c7SWei Liu &v9stat.extension)); 307160ce86c7SWei Liu if (err < 0) { 307260ce86c7SWei Liu goto out; 307360ce86c7SWei Liu } 307460ce86c7SWei Liu } 307560ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 307660ce86c7SWei Liu struct timespec times[2]; 307760ce86c7SWei Liu if (v9stat.atime != -1) { 307860ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 307960ce86c7SWei Liu times[0].tv_nsec = 0; 308060ce86c7SWei Liu } else { 308160ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 308260ce86c7SWei Liu } 308360ce86c7SWei Liu if (v9stat.mtime != -1) { 308460ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 308560ce86c7SWei Liu times[1].tv_nsec = 0; 308660ce86c7SWei Liu } else { 308760ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 308860ce86c7SWei Liu } 308960ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 309060ce86c7SWei Liu if (err < 0) { 309160ce86c7SWei Liu goto out; 309260ce86c7SWei Liu } 309360ce86c7SWei Liu } 309460ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 309560ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 309660ce86c7SWei Liu if (err < 0) { 309760ce86c7SWei Liu goto out; 309860ce86c7SWei Liu } 309960ce86c7SWei Liu } 310060ce86c7SWei Liu if (v9stat.name.size != 0) { 31011d203986SGreg Kurz v9fs_path_write_lock(s); 310260ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 31031d203986SGreg Kurz v9fs_path_unlock(s); 310460ce86c7SWei Liu if (err < 0) { 310560ce86c7SWei Liu goto out; 310660ce86c7SWei Liu } 310760ce86c7SWei Liu } 310860ce86c7SWei Liu if (v9stat.length != -1) { 310960ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 311060ce86c7SWei Liu if (err < 0) { 311160ce86c7SWei Liu goto out; 311260ce86c7SWei Liu } 311360ce86c7SWei Liu } 311460ce86c7SWei Liu err = offset; 311560ce86c7SWei Liu out: 311660ce86c7SWei Liu put_fid(pdu, fidp); 311760ce86c7SWei Liu out_nofid: 311860ce86c7SWei Liu v9fs_stat_free(&v9stat); 311960ce86c7SWei Liu pdu_complete(pdu, err); 312060ce86c7SWei Liu } 312160ce86c7SWei Liu 312260ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 312360ce86c7SWei Liu { 312460ce86c7SWei Liu uint32_t f_type; 312560ce86c7SWei Liu uint32_t f_bsize; 312660ce86c7SWei Liu uint64_t f_blocks; 312760ce86c7SWei Liu uint64_t f_bfree; 312860ce86c7SWei Liu uint64_t f_bavail; 312960ce86c7SWei Liu uint64_t f_files; 313060ce86c7SWei Liu uint64_t f_ffree; 313160ce86c7SWei Liu uint64_t fsid_val; 313260ce86c7SWei Liu uint32_t f_namelen; 313360ce86c7SWei Liu size_t offset = 7; 313460ce86c7SWei Liu int32_t bsize_factor; 313560ce86c7SWei Liu 313660ce86c7SWei Liu /* 313760ce86c7SWei Liu * compute bsize factor based on host file system block size 313860ce86c7SWei Liu * and client msize 313960ce86c7SWei Liu */ 314060ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 314160ce86c7SWei Liu if (!bsize_factor) { 314260ce86c7SWei Liu bsize_factor = 1; 314360ce86c7SWei Liu } 314460ce86c7SWei Liu f_type = stbuf->f_type; 314560ce86c7SWei Liu f_bsize = stbuf->f_bsize; 314660ce86c7SWei Liu f_bsize *= bsize_factor; 314760ce86c7SWei Liu /* 314860ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 314960ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 315060ce86c7SWei Liu * blocks by bsize factor 315160ce86c7SWei Liu */ 315260ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 315360ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 315460ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 315560ce86c7SWei Liu f_files = stbuf->f_files; 315660ce86c7SWei Liu f_ffree = stbuf->f_ffree; 315760ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 315860ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 315960ce86c7SWei Liu f_namelen = stbuf->f_namelen; 316060ce86c7SWei Liu 316160ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 316260ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 316360ce86c7SWei Liu f_bavail, f_files, f_ffree, 316460ce86c7SWei Liu fsid_val, f_namelen); 316560ce86c7SWei Liu } 316660ce86c7SWei Liu 31678440e22eSGreg Kurz static void coroutine_fn v9fs_statfs(void *opaque) 316860ce86c7SWei Liu { 316960ce86c7SWei Liu int32_t fid; 317060ce86c7SWei Liu ssize_t retval = 0; 317160ce86c7SWei Liu size_t offset = 7; 317260ce86c7SWei Liu V9fsFidState *fidp; 317360ce86c7SWei Liu struct statfs stbuf; 317460ce86c7SWei Liu V9fsPDU *pdu = opaque; 317560ce86c7SWei Liu V9fsState *s = pdu->s; 317660ce86c7SWei Liu 317760ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 317860ce86c7SWei Liu if (retval < 0) { 317960ce86c7SWei Liu goto out_nofid; 318060ce86c7SWei Liu } 318160ce86c7SWei Liu fidp = get_fid(pdu, fid); 318260ce86c7SWei Liu if (fidp == NULL) { 318360ce86c7SWei Liu retval = -ENOENT; 318460ce86c7SWei Liu goto out_nofid; 318560ce86c7SWei Liu } 318660ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 318760ce86c7SWei Liu if (retval < 0) { 318860ce86c7SWei Liu goto out; 318960ce86c7SWei Liu } 319060ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 319160ce86c7SWei Liu if (retval < 0) { 319260ce86c7SWei Liu goto out; 319360ce86c7SWei Liu } 319460ce86c7SWei Liu retval += offset; 319560ce86c7SWei Liu out: 319660ce86c7SWei Liu put_fid(pdu, fidp); 319760ce86c7SWei Liu out_nofid: 319860ce86c7SWei Liu pdu_complete(pdu, retval); 319960ce86c7SWei Liu } 320060ce86c7SWei Liu 32018440e22eSGreg Kurz static void coroutine_fn v9fs_mknod(void *opaque) 320260ce86c7SWei Liu { 320360ce86c7SWei Liu 320460ce86c7SWei Liu int mode; 320560ce86c7SWei Liu gid_t gid; 320660ce86c7SWei Liu int32_t fid; 320760ce86c7SWei Liu V9fsQID qid; 320860ce86c7SWei Liu int err = 0; 320960ce86c7SWei Liu int major, minor; 321060ce86c7SWei Liu size_t offset = 7; 321160ce86c7SWei Liu V9fsString name; 321260ce86c7SWei Liu struct stat stbuf; 321360ce86c7SWei Liu V9fsFidState *fidp; 321460ce86c7SWei Liu V9fsPDU *pdu = opaque; 321560ce86c7SWei Liu 321660ce86c7SWei Liu v9fs_string_init(&name); 321760ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 321860ce86c7SWei Liu &major, &minor, &gid); 321960ce86c7SWei Liu if (err < 0) { 322060ce86c7SWei Liu goto out_nofid; 322160ce86c7SWei Liu } 322260ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 322360ce86c7SWei Liu 3224fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3225fff39a7aSGreg Kurz err = -ENOENT; 3226fff39a7aSGreg Kurz goto out_nofid; 3227fff39a7aSGreg Kurz } 3228fff39a7aSGreg Kurz 3229805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3230805b5d98SGreg Kurz err = -EEXIST; 3231805b5d98SGreg Kurz goto out_nofid; 3232805b5d98SGreg Kurz } 3233805b5d98SGreg Kurz 323460ce86c7SWei Liu fidp = get_fid(pdu, fid); 323560ce86c7SWei Liu if (fidp == NULL) { 323660ce86c7SWei Liu err = -ENOENT; 323760ce86c7SWei Liu goto out_nofid; 323860ce86c7SWei Liu } 323960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 324060ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 324160ce86c7SWei Liu if (err < 0) { 324260ce86c7SWei Liu goto out; 324360ce86c7SWei Liu } 32443b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 32453b5ee9e8SAntonios Motakis if (err < 0) { 32463b5ee9e8SAntonios Motakis goto out; 32473b5ee9e8SAntonios Motakis } 324860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 324960ce86c7SWei Liu if (err < 0) { 325060ce86c7SWei Liu goto out; 325160ce86c7SWei Liu } 325260ce86c7SWei Liu err += offset; 325360ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 325460ce86c7SWei Liu qid.type, qid.version, qid.path); 325560ce86c7SWei Liu out: 325660ce86c7SWei Liu put_fid(pdu, fidp); 325760ce86c7SWei Liu out_nofid: 325860ce86c7SWei Liu pdu_complete(pdu, err); 325960ce86c7SWei Liu v9fs_string_free(&name); 326060ce86c7SWei Liu } 326160ce86c7SWei Liu 326260ce86c7SWei Liu /* 326360ce86c7SWei Liu * Implement posix byte range locking code 326460ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 326560ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 326660ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 326760ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 326860ce86c7SWei Liu * So when a TLOCK request comes, always return success 326960ce86c7SWei Liu */ 32708440e22eSGreg Kurz static void coroutine_fn v9fs_lock(void *opaque) 327160ce86c7SWei Liu { 327260ce86c7SWei Liu V9fsFlock flock; 327360ce86c7SWei Liu size_t offset = 7; 327460ce86c7SWei Liu struct stat stbuf; 327560ce86c7SWei Liu V9fsFidState *fidp; 327660ce86c7SWei Liu int32_t fid, err = 0; 327760ce86c7SWei Liu V9fsPDU *pdu = opaque; 327860ce86c7SWei Liu 327960ce86c7SWei Liu v9fs_string_init(&flock.client_id); 328060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 328160ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 328260ce86c7SWei Liu &flock.proc_id, &flock.client_id); 328360ce86c7SWei Liu if (err < 0) { 328460ce86c7SWei Liu goto out_nofid; 328560ce86c7SWei Liu } 328660ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 328760ce86c7SWei Liu flock.type, flock.start, flock.length); 328860ce86c7SWei Liu 328960ce86c7SWei Liu 329060ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 329160ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 329260ce86c7SWei Liu err = -EINVAL; 329360ce86c7SWei Liu goto out_nofid; 329460ce86c7SWei Liu } 329560ce86c7SWei Liu fidp = get_fid(pdu, fid); 329660ce86c7SWei Liu if (fidp == NULL) { 329760ce86c7SWei Liu err = -ENOENT; 329860ce86c7SWei Liu goto out_nofid; 329960ce86c7SWei Liu } 330060ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 330160ce86c7SWei Liu if (err < 0) { 330260ce86c7SWei Liu goto out; 330360ce86c7SWei Liu } 33044bae2b39SPaolo Bonzini err = pdu_marshal(pdu, offset, "b", P9_LOCK_SUCCESS); 33054bae2b39SPaolo Bonzini if (err < 0) { 33064bae2b39SPaolo Bonzini goto out; 33074bae2b39SPaolo Bonzini } 33084bae2b39SPaolo Bonzini err += offset; 33094bae2b39SPaolo Bonzini trace_v9fs_lock_return(pdu->tag, pdu->id, P9_LOCK_SUCCESS); 331060ce86c7SWei Liu out: 331160ce86c7SWei Liu put_fid(pdu, fidp); 331260ce86c7SWei Liu out_nofid: 331360ce86c7SWei Liu pdu_complete(pdu, err); 331460ce86c7SWei Liu v9fs_string_free(&flock.client_id); 331560ce86c7SWei Liu } 331660ce86c7SWei Liu 331760ce86c7SWei Liu /* 331860ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 331960ce86c7SWei Liu * handling is done by client's VFS layer. 332060ce86c7SWei Liu */ 33218440e22eSGreg Kurz static void coroutine_fn v9fs_getlock(void *opaque) 332260ce86c7SWei Liu { 332360ce86c7SWei Liu size_t offset = 7; 332460ce86c7SWei Liu struct stat stbuf; 332560ce86c7SWei Liu V9fsFidState *fidp; 332660ce86c7SWei Liu V9fsGetlock glock; 332760ce86c7SWei Liu int32_t fid, err = 0; 332860ce86c7SWei Liu V9fsPDU *pdu = opaque; 332960ce86c7SWei Liu 333060ce86c7SWei Liu v9fs_string_init(&glock.client_id); 333160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 333260ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 333360ce86c7SWei Liu &glock.client_id); 333460ce86c7SWei Liu if (err < 0) { 333560ce86c7SWei Liu goto out_nofid; 333660ce86c7SWei Liu } 333760ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 333860ce86c7SWei Liu glock.type, glock.start, glock.length); 333960ce86c7SWei Liu 334060ce86c7SWei Liu fidp = get_fid(pdu, fid); 334160ce86c7SWei Liu if (fidp == NULL) { 334260ce86c7SWei Liu err = -ENOENT; 334360ce86c7SWei Liu goto out_nofid; 334460ce86c7SWei Liu } 334560ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 334660ce86c7SWei Liu if (err < 0) { 334760ce86c7SWei Liu goto out; 334860ce86c7SWei Liu } 334960ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 335060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 335160ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 335260ce86c7SWei Liu &glock.client_id); 335360ce86c7SWei Liu if (err < 0) { 335460ce86c7SWei Liu goto out; 335560ce86c7SWei Liu } 335660ce86c7SWei Liu err += offset; 335760ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 335860ce86c7SWei Liu glock.length, glock.proc_id); 335960ce86c7SWei Liu out: 336060ce86c7SWei Liu put_fid(pdu, fidp); 336160ce86c7SWei Liu out_nofid: 336260ce86c7SWei Liu pdu_complete(pdu, err); 336360ce86c7SWei Liu v9fs_string_free(&glock.client_id); 336460ce86c7SWei Liu } 336560ce86c7SWei Liu 33668440e22eSGreg Kurz static void coroutine_fn v9fs_mkdir(void *opaque) 336760ce86c7SWei Liu { 336860ce86c7SWei Liu V9fsPDU *pdu = opaque; 336960ce86c7SWei Liu size_t offset = 7; 337060ce86c7SWei Liu int32_t fid; 337160ce86c7SWei Liu struct stat stbuf; 337260ce86c7SWei Liu V9fsQID qid; 337360ce86c7SWei Liu V9fsString name; 337460ce86c7SWei Liu V9fsFidState *fidp; 337560ce86c7SWei Liu gid_t gid; 337660ce86c7SWei Liu int mode; 337760ce86c7SWei Liu int err = 0; 337860ce86c7SWei Liu 337960ce86c7SWei Liu v9fs_string_init(&name); 338060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 338160ce86c7SWei Liu if (err < 0) { 338260ce86c7SWei Liu goto out_nofid; 338360ce86c7SWei Liu } 338460ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 338560ce86c7SWei Liu 3386fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3387fff39a7aSGreg Kurz err = -ENOENT; 3388fff39a7aSGreg Kurz goto out_nofid; 3389fff39a7aSGreg Kurz } 3390fff39a7aSGreg Kurz 3391805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3392805b5d98SGreg Kurz err = -EEXIST; 3393805b5d98SGreg Kurz goto out_nofid; 3394805b5d98SGreg Kurz } 3395805b5d98SGreg Kurz 339660ce86c7SWei Liu fidp = get_fid(pdu, fid); 339760ce86c7SWei Liu if (fidp == NULL) { 339860ce86c7SWei Liu err = -ENOENT; 339960ce86c7SWei Liu goto out_nofid; 340060ce86c7SWei Liu } 340160ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 340260ce86c7SWei Liu if (err < 0) { 340360ce86c7SWei Liu goto out; 340460ce86c7SWei Liu } 34053b5ee9e8SAntonios Motakis err = stat_to_qid(pdu, &stbuf, &qid); 34063b5ee9e8SAntonios Motakis if (err < 0) { 34073b5ee9e8SAntonios Motakis goto out; 34083b5ee9e8SAntonios Motakis } 340960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 341060ce86c7SWei Liu if (err < 0) { 341160ce86c7SWei Liu goto out; 341260ce86c7SWei Liu } 341360ce86c7SWei Liu err += offset; 341460ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 341560ce86c7SWei Liu qid.type, qid.version, qid.path, err); 341660ce86c7SWei Liu out: 341760ce86c7SWei Liu put_fid(pdu, fidp); 341860ce86c7SWei Liu out_nofid: 341960ce86c7SWei Liu pdu_complete(pdu, err); 342060ce86c7SWei Liu v9fs_string_free(&name); 342160ce86c7SWei Liu } 342260ce86c7SWei Liu 34238440e22eSGreg Kurz static void coroutine_fn v9fs_xattrwalk(void *opaque) 342460ce86c7SWei Liu { 342560ce86c7SWei Liu int64_t size; 342660ce86c7SWei Liu V9fsString name; 342760ce86c7SWei Liu ssize_t err = 0; 342860ce86c7SWei Liu size_t offset = 7; 342960ce86c7SWei Liu int32_t fid, newfid; 343060ce86c7SWei Liu V9fsFidState *file_fidp; 343160ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 343260ce86c7SWei Liu V9fsPDU *pdu = opaque; 343360ce86c7SWei Liu V9fsState *s = pdu->s; 343460ce86c7SWei Liu 343560ce86c7SWei Liu v9fs_string_init(&name); 343660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 343760ce86c7SWei Liu if (err < 0) { 343860ce86c7SWei Liu goto out_nofid; 343960ce86c7SWei Liu } 344060ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 344160ce86c7SWei Liu 344260ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 344360ce86c7SWei Liu if (file_fidp == NULL) { 344460ce86c7SWei Liu err = -ENOENT; 344560ce86c7SWei Liu goto out_nofid; 344660ce86c7SWei Liu } 344760ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 344860ce86c7SWei Liu if (xattr_fidp == NULL) { 344960ce86c7SWei Liu err = -EINVAL; 345060ce86c7SWei Liu goto out; 345160ce86c7SWei Liu } 345260ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 3453ba42ebb8SLi Qiang if (!v9fs_string_size(&name)) { 345460ce86c7SWei Liu /* 345560ce86c7SWei Liu * listxattr request. Get the size first 345660ce86c7SWei Liu */ 345760ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 345860ce86c7SWei Liu if (size < 0) { 345960ce86c7SWei Liu err = size; 346060ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 346160ce86c7SWei Liu goto out; 346260ce86c7SWei Liu } 346360ce86c7SWei Liu /* 346460ce86c7SWei Liu * Read the xattr value 346560ce86c7SWei Liu */ 346660ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 346760ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3468dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 34697bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3470a647502cSKeno Fischer if (size) { 347160ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 347260ce86c7SWei Liu xattr_fidp->fs.xattr.value, 347360ce86c7SWei Liu xattr_fidp->fs.xattr.len); 347460ce86c7SWei Liu if (err < 0) { 347560ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 347660ce86c7SWei Liu goto out; 347760ce86c7SWei Liu } 347860ce86c7SWei Liu } 347960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 348060ce86c7SWei Liu if (err < 0) { 348160ce86c7SWei Liu goto out; 348260ce86c7SWei Liu } 348360ce86c7SWei Liu err += offset; 348460ce86c7SWei Liu } else { 348560ce86c7SWei Liu /* 348660ce86c7SWei Liu * specific xattr fid. We check for xattr 348760ce86c7SWei Liu * presence also collect the xattr size 348860ce86c7SWei Liu */ 348960ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 349060ce86c7SWei Liu &name, NULL, 0); 349160ce86c7SWei Liu if (size < 0) { 349260ce86c7SWei Liu err = size; 349360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 349460ce86c7SWei Liu goto out; 349560ce86c7SWei Liu } 349660ce86c7SWei Liu /* 349760ce86c7SWei Liu * Read the xattr value 349860ce86c7SWei Liu */ 349960ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 350060ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 3501dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = true; 35027bd92756SPrasad J Pandit xattr_fidp->fs.xattr.value = g_malloc0(size); 3503a647502cSKeno Fischer if (size) { 350460ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 350560ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 350660ce86c7SWei Liu xattr_fidp->fs.xattr.len); 350760ce86c7SWei Liu if (err < 0) { 350860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 350960ce86c7SWei Liu goto out; 351060ce86c7SWei Liu } 351160ce86c7SWei Liu } 351260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 351360ce86c7SWei Liu if (err < 0) { 351460ce86c7SWei Liu goto out; 351560ce86c7SWei Liu } 351660ce86c7SWei Liu err += offset; 351760ce86c7SWei Liu } 351860ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 351960ce86c7SWei Liu out: 352060ce86c7SWei Liu put_fid(pdu, file_fidp); 352160ce86c7SWei Liu if (xattr_fidp) { 352260ce86c7SWei Liu put_fid(pdu, xattr_fidp); 352360ce86c7SWei Liu } 352460ce86c7SWei Liu out_nofid: 352560ce86c7SWei Liu pdu_complete(pdu, err); 352660ce86c7SWei Liu v9fs_string_free(&name); 352760ce86c7SWei Liu } 352860ce86c7SWei Liu 35298440e22eSGreg Kurz static void coroutine_fn v9fs_xattrcreate(void *opaque) 353060ce86c7SWei Liu { 3531aca6897fSKeno Fischer int flags, rflags = 0; 353260ce86c7SWei Liu int32_t fid; 35333b79ef2cSGreg Kurz uint64_t size; 353460ce86c7SWei Liu ssize_t err = 0; 353560ce86c7SWei Liu V9fsString name; 353660ce86c7SWei Liu size_t offset = 7; 353760ce86c7SWei Liu V9fsFidState *file_fidp; 353860ce86c7SWei Liu V9fsFidState *xattr_fidp; 353960ce86c7SWei Liu V9fsPDU *pdu = opaque; 354060ce86c7SWei Liu 354160ce86c7SWei Liu v9fs_string_init(&name); 354260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 354360ce86c7SWei Liu if (err < 0) { 354460ce86c7SWei Liu goto out_nofid; 354560ce86c7SWei Liu } 354660ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 354760ce86c7SWei Liu 3548aca6897fSKeno Fischer if (flags & ~(P9_XATTR_CREATE | P9_XATTR_REPLACE)) { 3549aca6897fSKeno Fischer err = -EINVAL; 3550aca6897fSKeno Fischer goto out_nofid; 3551aca6897fSKeno Fischer } 3552aca6897fSKeno Fischer 3553aca6897fSKeno Fischer if (flags & P9_XATTR_CREATE) { 3554aca6897fSKeno Fischer rflags |= XATTR_CREATE; 3555aca6897fSKeno Fischer } 3556aca6897fSKeno Fischer 3557aca6897fSKeno Fischer if (flags & P9_XATTR_REPLACE) { 3558aca6897fSKeno Fischer rflags |= XATTR_REPLACE; 3559aca6897fSKeno Fischer } 3560aca6897fSKeno Fischer 35613b79ef2cSGreg Kurz if (size > XATTR_SIZE_MAX) { 35623b79ef2cSGreg Kurz err = -E2BIG; 35633b79ef2cSGreg Kurz goto out_nofid; 35643b79ef2cSGreg Kurz } 35653b79ef2cSGreg Kurz 356660ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 356760ce86c7SWei Liu if (file_fidp == NULL) { 356860ce86c7SWei Liu err = -EINVAL; 356960ce86c7SWei Liu goto out_nofid; 357060ce86c7SWei Liu } 3571dd654e03SGreg Kurz if (file_fidp->fid_type != P9_FID_NONE) { 3572dd654e03SGreg Kurz err = -EINVAL; 3573dd654e03SGreg Kurz goto out_put_fid; 3574dd654e03SGreg Kurz } 3575dd654e03SGreg Kurz 357660ce86c7SWei Liu /* Make the file fid point to xattr */ 357760ce86c7SWei Liu xattr_fidp = file_fidp; 357860ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 357960ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 3580dd28fbbcSLi Qiang xattr_fidp->fs.xattr.xattrwalk_fid = false; 358160ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 3582aca6897fSKeno Fischer xattr_fidp->fs.xattr.flags = rflags; 358360ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 358460ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 3585eb687602SLi Qiang xattr_fidp->fs.xattr.value = g_malloc0(size); 358660ce86c7SWei Liu err = offset; 3587dd654e03SGreg Kurz out_put_fid: 358860ce86c7SWei Liu put_fid(pdu, file_fidp); 358960ce86c7SWei Liu out_nofid: 359060ce86c7SWei Liu pdu_complete(pdu, err); 359160ce86c7SWei Liu v9fs_string_free(&name); 359260ce86c7SWei Liu } 359360ce86c7SWei Liu 35948440e22eSGreg Kurz static void coroutine_fn v9fs_readlink(void *opaque) 359560ce86c7SWei Liu { 359660ce86c7SWei Liu V9fsPDU *pdu = opaque; 359760ce86c7SWei Liu size_t offset = 7; 359860ce86c7SWei Liu V9fsString target; 359960ce86c7SWei Liu int32_t fid; 360060ce86c7SWei Liu int err = 0; 360160ce86c7SWei Liu V9fsFidState *fidp; 360260ce86c7SWei Liu 360360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 360460ce86c7SWei Liu if (err < 0) { 360560ce86c7SWei Liu goto out_nofid; 360660ce86c7SWei Liu } 360760ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 360860ce86c7SWei Liu fidp = get_fid(pdu, fid); 360960ce86c7SWei Liu if (fidp == NULL) { 361060ce86c7SWei Liu err = -ENOENT; 361160ce86c7SWei Liu goto out_nofid; 361260ce86c7SWei Liu } 361360ce86c7SWei Liu 361460ce86c7SWei Liu v9fs_string_init(&target); 361560ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 361660ce86c7SWei Liu if (err < 0) { 361760ce86c7SWei Liu goto out; 361860ce86c7SWei Liu } 361960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 362060ce86c7SWei Liu if (err < 0) { 362160ce86c7SWei Liu v9fs_string_free(&target); 362260ce86c7SWei Liu goto out; 362360ce86c7SWei Liu } 362460ce86c7SWei Liu err += offset; 362560ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 362660ce86c7SWei Liu v9fs_string_free(&target); 362760ce86c7SWei Liu out: 362860ce86c7SWei Liu put_fid(pdu, fidp); 362960ce86c7SWei Liu out_nofid: 363060ce86c7SWei Liu pdu_complete(pdu, err); 363160ce86c7SWei Liu } 363260ce86c7SWei Liu 363360ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 363460ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 363560ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 363660ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 363760ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 363860ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 363960ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 364060ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 364160ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 364260ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 364360ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 364460ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 364560ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 364660ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 364760ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 364860ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 364960ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 365060ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 365160ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 365260ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 365360ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 365460ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 365560ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 365660ce86c7SWei Liu [P9_TREAD] = v9fs_read, 365760ce86c7SWei Liu #if 0 365860ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 365960ce86c7SWei Liu #endif 366060ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 366160ce86c7SWei Liu [P9_TLINK] = v9fs_link, 366260ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 366360ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 366460ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 366560ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 366660ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 366760ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 366860ce86c7SWei Liu }; 366960ce86c7SWei Liu 36708440e22eSGreg Kurz static void coroutine_fn v9fs_op_not_supp(void *opaque) 367160ce86c7SWei Liu { 367260ce86c7SWei Liu V9fsPDU *pdu = opaque; 367360ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 367460ce86c7SWei Liu } 367560ce86c7SWei Liu 36768440e22eSGreg Kurz static void coroutine_fn v9fs_fs_ro(void *opaque) 367760ce86c7SWei Liu { 367860ce86c7SWei Liu V9fsPDU *pdu = opaque; 367960ce86c7SWei Liu pdu_complete(pdu, -EROFS); 368060ce86c7SWei Liu } 368160ce86c7SWei Liu 368260ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 368360ce86c7SWei Liu { 368460ce86c7SWei Liu switch (pdu->id) { 368560ce86c7SWei Liu case P9_TREADDIR: 368660ce86c7SWei Liu case P9_TSTATFS: 368760ce86c7SWei Liu case P9_TGETATTR: 368860ce86c7SWei Liu case P9_TXATTRWALK: 368960ce86c7SWei Liu case P9_TLOCK: 369060ce86c7SWei Liu case P9_TGETLOCK: 369160ce86c7SWei Liu case P9_TREADLINK: 369260ce86c7SWei Liu case P9_TVERSION: 369360ce86c7SWei Liu case P9_TLOPEN: 369460ce86c7SWei Liu case P9_TATTACH: 369560ce86c7SWei Liu case P9_TSTAT: 369660ce86c7SWei Liu case P9_TWALK: 369760ce86c7SWei Liu case P9_TCLUNK: 369860ce86c7SWei Liu case P9_TFSYNC: 369960ce86c7SWei Liu case P9_TOPEN: 370060ce86c7SWei Liu case P9_TREAD: 370160ce86c7SWei Liu case P9_TAUTH: 370260ce86c7SWei Liu case P9_TFLUSH: 370360ce86c7SWei Liu return 1; 370460ce86c7SWei Liu default: 370560ce86c7SWei Liu return 0; 370660ce86c7SWei Liu } 370760ce86c7SWei Liu } 370860ce86c7SWei Liu 3709506f3275SGreg Kurz void pdu_submit(V9fsPDU *pdu, P9MsgHeader *hdr) 371060ce86c7SWei Liu { 371160ce86c7SWei Liu Coroutine *co; 371260ce86c7SWei Liu CoroutineEntry *handler; 371360ce86c7SWei Liu V9fsState *s = pdu->s; 371460ce86c7SWei Liu 3715506f3275SGreg Kurz pdu->size = le32_to_cpu(hdr->size_le); 3716506f3275SGreg Kurz pdu->id = hdr->id; 3717506f3275SGreg Kurz pdu->tag = le16_to_cpu(hdr->tag_le); 3718506f3275SGreg Kurz 371960ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 372060ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 372160ce86c7SWei Liu handler = v9fs_op_not_supp; 3722d1471233SGreg Kurz } else if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 3723d1471233SGreg Kurz handler = v9fs_fs_ro; 372460ce86c7SWei Liu } else { 372560ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 372660ce86c7SWei Liu } 372760ce86c7SWei Liu 3728506f3275SGreg Kurz qemu_co_queue_init(&pdu->complete); 37290b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 37300b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 373160ce86c7SWei Liu } 373260ce86c7SWei Liu 37332a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 3734066eb006SGreg Kurz int v9fs_device_realize_common(V9fsState *s, const V9fsTransport *t, 3735066eb006SGreg Kurz Error **errp) 37362a0c56aaSWei Liu { 37372a0c56aaSWei Liu int i, len; 37382a0c56aaSWei Liu struct stat stat; 37392a0c56aaSWei Liu FsDriverEntry *fse; 37402a0c56aaSWei Liu V9fsPath path; 37412a0c56aaSWei Liu int rc = 1; 37422a0c56aaSWei Liu 3743066eb006SGreg Kurz assert(!s->transport); 3744066eb006SGreg Kurz s->transport = t; 3745066eb006SGreg Kurz 37462a0c56aaSWei Liu /* initialize pdu allocator */ 37472a0c56aaSWei Liu QLIST_INIT(&s->free_list); 37482a0c56aaSWei Liu QLIST_INIT(&s->active_list); 37490d78289cSGreg Kurz for (i = 0; i < MAX_REQ; i++) { 3750583f21f8SStefano Stabellini QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); 3751583f21f8SStefano Stabellini s->pdus[i].s = s; 3752583f21f8SStefano Stabellini s->pdus[i].idx = i; 37532a0c56aaSWei Liu } 37542a0c56aaSWei Liu 37552a0c56aaSWei Liu v9fs_path_init(&path); 37562a0c56aaSWei Liu 37572a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 37582a0c56aaSWei Liu 37592a0c56aaSWei Liu if (!fse) { 37602a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 37612a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 37622a0c56aaSWei Liu "id = %s", 37632a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 37642a0c56aaSWei Liu goto out; 37652a0c56aaSWei Liu } 37662a0c56aaSWei Liu 37672a0c56aaSWei Liu if (!s->fsconf.tag) { 37682a0c56aaSWei Liu /* we haven't specified a mount_tag */ 37692a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 37702a0c56aaSWei Liu s->fsconf.fsdev_id); 37712a0c56aaSWei Liu goto out; 37722a0c56aaSWei Liu } 37732a0c56aaSWei Liu 37742a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 37752a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 37762a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 37772a0c56aaSWei Liu len = strlen(s->fsconf.tag); 37782a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 37792a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 37802a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 37812a0c56aaSWei Liu goto out; 37822a0c56aaSWei Liu } 37832a0c56aaSWei Liu 37842a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 37852a0c56aaSWei Liu s->ctx.uid = -1; 37862a0c56aaSWei Liu 37872a0c56aaSWei Liu s->ops = fse->ops; 37882a0c56aaSWei Liu 3789b96feb2cSTobias Schramm s->ctx.fmode = fse->fmode; 3790b96feb2cSTobias Schramm s->ctx.dmode = fse->dmode; 3791b96feb2cSTobias Schramm 37922a0c56aaSWei Liu s->fid_list = NULL; 37932a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 37942a0c56aaSWei Liu 379565603a80SGreg Kurz if (s->ops->init(&s->ctx, errp) < 0) { 379665603a80SGreg Kurz error_prepend(errp, "cannot initialize fsdev '%s': ", 379765603a80SGreg Kurz s->fsconf.fsdev_id); 37982a0c56aaSWei Liu goto out; 37992a0c56aaSWei Liu } 38002a0c56aaSWei Liu 38012a0c56aaSWei Liu /* 38022a0c56aaSWei Liu * Check details of export path, We need to use fs driver 38032a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 38042a0c56aaSWei Liu * use co-routines here. 38052a0c56aaSWei Liu */ 38062a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 38072a0c56aaSWei Liu error_setg(errp, 38082a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 38092a0c56aaSWei Liu goto out; 38102a0c56aaSWei Liu } 38112a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 38122a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 38132a0c56aaSWei Liu goto out; 38142a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 38152a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 38162a0c56aaSWei Liu goto out; 38172a0c56aaSWei Liu } 3818b8bbdb88SPradeep Jagadeesh 38193b5ee9e8SAntonios Motakis s->dev_id = stat.st_dev; 38203b5ee9e8SAntonios Motakis 3821*1a6ed33cSAntonios Motakis qpp_table_init(&s->qpp_table); 3822*1a6ed33cSAntonios Motakis s->qp_prefix_next = 1; /* reserve 0 to detect overflow */ 3823*1a6ed33cSAntonios Motakis 3824b8bbdb88SPradeep Jagadeesh s->ctx.fst = &fse->fst; 3825b8bbdb88SPradeep Jagadeesh fsdev_throttle_init(s->ctx.fst); 3826b8bbdb88SPradeep Jagadeesh 38272a0c56aaSWei Liu rc = 0; 38282a0c56aaSWei Liu out: 38292a0c56aaSWei Liu if (rc) { 3830c0da0cb7SGreg Kurz v9fs_device_unrealize_common(s, NULL); 3831702dbcc2SLi Qiang } 38322a0c56aaSWei Liu v9fs_path_free(&path); 38332a0c56aaSWei Liu return rc; 38342a0c56aaSWei Liu } 38352a0c56aaSWei Liu 38362a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 38372a0c56aaSWei Liu { 3838c0da0cb7SGreg Kurz if (s->ops && s->ops->cleanup) { 3839702dbcc2SLi Qiang s->ops->cleanup(&s->ctx); 3840702dbcc2SLi Qiang } 3841c0da0cb7SGreg Kurz if (s->ctx.fst) { 3842b8bbdb88SPradeep Jagadeesh fsdev_throttle_cleanup(s->ctx.fst); 3843c0da0cb7SGreg Kurz } 38442a0c56aaSWei Liu g_free(s->tag); 3845*1a6ed33cSAntonios Motakis qpp_table_destroy(&s->qpp_table); 38464774718eSLi Qiang g_free(s->ctx.fs_root); 38472a0c56aaSWei Liu } 38482a0c56aaSWei Liu 38490e44a0fdSGreg Kurz typedef struct VirtfsCoResetData { 38500e44a0fdSGreg Kurz V9fsPDU pdu; 38510e44a0fdSGreg Kurz bool done; 38520e44a0fdSGreg Kurz } VirtfsCoResetData; 38530e44a0fdSGreg Kurz 38540e44a0fdSGreg Kurz static void coroutine_fn virtfs_co_reset(void *opaque) 38550e44a0fdSGreg Kurz { 38560e44a0fdSGreg Kurz VirtfsCoResetData *data = opaque; 38570e44a0fdSGreg Kurz 38580e44a0fdSGreg Kurz virtfs_reset(&data->pdu); 38590e44a0fdSGreg Kurz data->done = true; 38600e44a0fdSGreg Kurz } 38610e44a0fdSGreg Kurz 38620e44a0fdSGreg Kurz void v9fs_reset(V9fsState *s) 38630e44a0fdSGreg Kurz { 38640e44a0fdSGreg Kurz VirtfsCoResetData data = { .pdu = { .s = s }, .done = false }; 38650e44a0fdSGreg Kurz Coroutine *co; 38660e44a0fdSGreg Kurz 38670e44a0fdSGreg Kurz while (!QLIST_EMPTY(&s->active_list)) { 38680e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 38690e44a0fdSGreg Kurz } 38700e44a0fdSGreg Kurz 38710e44a0fdSGreg Kurz co = qemu_coroutine_create(virtfs_co_reset, &data); 38720e44a0fdSGreg Kurz qemu_coroutine_enter(co); 38730e44a0fdSGreg Kurz 38740e44a0fdSGreg Kurz while (!data.done) { 38750e44a0fdSGreg Kurz aio_poll(qemu_get_aio_context(), true); 38760e44a0fdSGreg Kurz } 38770e44a0fdSGreg Kurz } 38780e44a0fdSGreg Kurz 387960ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 388060ce86c7SWei Liu { 388160ce86c7SWei Liu struct rlimit rlim; 388260ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 388363325b18SGreg Kurz error_report("Failed to get the resource limit"); 388460ce86c7SWei Liu exit(1); 388560ce86c7SWei Liu } 388660ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 388760ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 388860ce86c7SWei Liu } 3889