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" 1560ce86c7SWei Liu #include "hw/virtio/virtio.h" 16da34e65cSMarkus Armbruster #include "qapi/error.h" 1760ce86c7SWei Liu #include "qemu/error-report.h" 1860ce86c7SWei Liu #include "qemu/iov.h" 1960ce86c7SWei Liu #include "qemu/sockets.h" 2060ce86c7SWei Liu #include "virtio-9p.h" 2160ce86c7SWei Liu #include "fsdev/qemu-fsdev.h" 2260ce86c7SWei Liu #include "9p-xattr.h" 2360ce86c7SWei Liu #include "coth.h" 2460ce86c7SWei Liu #include "trace.h" 2560ce86c7SWei Liu #include "migration/migration.h" 2660ce86c7SWei Liu 2760ce86c7SWei Liu int open_fd_hw; 2860ce86c7SWei Liu int total_open_fd; 2960ce86c7SWei Liu static int open_fd_rc; 3060ce86c7SWei Liu 3160ce86c7SWei Liu enum { 3260ce86c7SWei Liu Oread = 0x00, 3360ce86c7SWei Liu Owrite = 0x01, 3460ce86c7SWei Liu Ordwr = 0x02, 3560ce86c7SWei Liu Oexec = 0x03, 3660ce86c7SWei Liu Oexcl = 0x04, 3760ce86c7SWei Liu Otrunc = 0x10, 3860ce86c7SWei Liu Orexec = 0x20, 3960ce86c7SWei Liu Orclose = 0x40, 4060ce86c7SWei Liu Oappend = 0x80, 4160ce86c7SWei Liu }; 4260ce86c7SWei Liu 4360ce86c7SWei Liu ssize_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 4460ce86c7SWei Liu { 4560ce86c7SWei Liu ssize_t ret; 4660ce86c7SWei Liu va_list ap; 4760ce86c7SWei Liu 4860ce86c7SWei Liu va_start(ap, fmt); 4960ce86c7SWei Liu ret = virtio_pdu_vmarshal(pdu, offset, fmt, ap); 5060ce86c7SWei Liu va_end(ap); 5160ce86c7SWei Liu 5260ce86c7SWei Liu return ret; 5360ce86c7SWei Liu } 5460ce86c7SWei Liu 5560ce86c7SWei Liu ssize_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) 5660ce86c7SWei Liu { 5760ce86c7SWei Liu ssize_t ret; 5860ce86c7SWei Liu va_list ap; 5960ce86c7SWei Liu 6060ce86c7SWei Liu va_start(ap, fmt); 6160ce86c7SWei Liu ret = virtio_pdu_vunmarshal(pdu, offset, fmt, ap); 6260ce86c7SWei Liu va_end(ap); 6360ce86c7SWei Liu 6460ce86c7SWei Liu return ret; 6560ce86c7SWei Liu } 6660ce86c7SWei Liu 6760ce86c7SWei Liu static void pdu_push_and_notify(V9fsPDU *pdu) 6860ce86c7SWei Liu { 6960ce86c7SWei Liu virtio_9p_push_and_notify(pdu); 7060ce86c7SWei Liu } 7160ce86c7SWei Liu 7260ce86c7SWei Liu static int omode_to_uflags(int8_t mode) 7360ce86c7SWei Liu { 7460ce86c7SWei Liu int ret = 0; 7560ce86c7SWei Liu 7660ce86c7SWei Liu switch (mode & 3) { 7760ce86c7SWei Liu case Oread: 7860ce86c7SWei Liu ret = O_RDONLY; 7960ce86c7SWei Liu break; 8060ce86c7SWei Liu case Ordwr: 8160ce86c7SWei Liu ret = O_RDWR; 8260ce86c7SWei Liu break; 8360ce86c7SWei Liu case Owrite: 8460ce86c7SWei Liu ret = O_WRONLY; 8560ce86c7SWei Liu break; 8660ce86c7SWei Liu case Oexec: 8760ce86c7SWei Liu ret = O_RDONLY; 8860ce86c7SWei Liu break; 8960ce86c7SWei Liu } 9060ce86c7SWei Liu 9160ce86c7SWei Liu if (mode & Otrunc) { 9260ce86c7SWei Liu ret |= O_TRUNC; 9360ce86c7SWei Liu } 9460ce86c7SWei Liu 9560ce86c7SWei Liu if (mode & Oappend) { 9660ce86c7SWei Liu ret |= O_APPEND; 9760ce86c7SWei Liu } 9860ce86c7SWei Liu 9960ce86c7SWei Liu if (mode & Oexcl) { 10060ce86c7SWei Liu ret |= O_EXCL; 10160ce86c7SWei Liu } 10260ce86c7SWei Liu 10360ce86c7SWei Liu return ret; 10460ce86c7SWei Liu } 10560ce86c7SWei Liu 10660ce86c7SWei Liu struct dotl_openflag_map { 10760ce86c7SWei Liu int dotl_flag; 10860ce86c7SWei Liu int open_flag; 10960ce86c7SWei Liu }; 11060ce86c7SWei Liu 11160ce86c7SWei Liu static int dotl_to_open_flags(int flags) 11260ce86c7SWei Liu { 11360ce86c7SWei Liu int i; 11460ce86c7SWei Liu /* 11560ce86c7SWei Liu * We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY 11660ce86c7SWei Liu * and P9_DOTL_NOACCESS 11760ce86c7SWei Liu */ 11860ce86c7SWei Liu int oflags = flags & O_ACCMODE; 11960ce86c7SWei Liu 12060ce86c7SWei Liu struct dotl_openflag_map dotl_oflag_map[] = { 12160ce86c7SWei Liu { P9_DOTL_CREATE, O_CREAT }, 12260ce86c7SWei Liu { P9_DOTL_EXCL, O_EXCL }, 12360ce86c7SWei Liu { P9_DOTL_NOCTTY , O_NOCTTY }, 12460ce86c7SWei Liu { P9_DOTL_TRUNC, O_TRUNC }, 12560ce86c7SWei Liu { P9_DOTL_APPEND, O_APPEND }, 12660ce86c7SWei Liu { P9_DOTL_NONBLOCK, O_NONBLOCK } , 12760ce86c7SWei Liu { P9_DOTL_DSYNC, O_DSYNC }, 12860ce86c7SWei Liu { P9_DOTL_FASYNC, FASYNC }, 12960ce86c7SWei Liu { P9_DOTL_DIRECT, O_DIRECT }, 13060ce86c7SWei Liu { P9_DOTL_LARGEFILE, O_LARGEFILE }, 13160ce86c7SWei Liu { P9_DOTL_DIRECTORY, O_DIRECTORY }, 13260ce86c7SWei Liu { P9_DOTL_NOFOLLOW, O_NOFOLLOW }, 13360ce86c7SWei Liu { P9_DOTL_NOATIME, O_NOATIME }, 13460ce86c7SWei Liu { P9_DOTL_SYNC, O_SYNC }, 13560ce86c7SWei Liu }; 13660ce86c7SWei Liu 13760ce86c7SWei Liu for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) { 13860ce86c7SWei Liu if (flags & dotl_oflag_map[i].dotl_flag) { 13960ce86c7SWei Liu oflags |= dotl_oflag_map[i].open_flag; 14060ce86c7SWei Liu } 14160ce86c7SWei Liu } 14260ce86c7SWei Liu 14360ce86c7SWei Liu return oflags; 14460ce86c7SWei Liu } 14560ce86c7SWei Liu 14660ce86c7SWei Liu void cred_init(FsCred *credp) 14760ce86c7SWei Liu { 14860ce86c7SWei Liu credp->fc_uid = -1; 14960ce86c7SWei Liu credp->fc_gid = -1; 15060ce86c7SWei Liu credp->fc_mode = -1; 15160ce86c7SWei Liu credp->fc_rdev = -1; 15260ce86c7SWei Liu } 15360ce86c7SWei Liu 15460ce86c7SWei Liu static int get_dotl_openflags(V9fsState *s, int oflags) 15560ce86c7SWei Liu { 15660ce86c7SWei Liu int flags; 15760ce86c7SWei Liu /* 15860ce86c7SWei Liu * Filter the client open flags 15960ce86c7SWei Liu */ 16060ce86c7SWei Liu flags = dotl_to_open_flags(oflags); 16160ce86c7SWei Liu flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); 16260ce86c7SWei Liu /* 16360ce86c7SWei Liu * Ignore direct disk access hint until the server supports it. 16460ce86c7SWei Liu */ 16560ce86c7SWei Liu flags &= ~O_DIRECT; 16660ce86c7SWei Liu return flags; 16760ce86c7SWei Liu } 16860ce86c7SWei Liu 16960ce86c7SWei Liu void v9fs_path_init(V9fsPath *path) 17060ce86c7SWei Liu { 17160ce86c7SWei Liu path->data = NULL; 17260ce86c7SWei Liu path->size = 0; 17360ce86c7SWei Liu } 17460ce86c7SWei Liu 17560ce86c7SWei Liu void v9fs_path_free(V9fsPath *path) 17660ce86c7SWei Liu { 17760ce86c7SWei Liu g_free(path->data); 17860ce86c7SWei Liu path->data = NULL; 17960ce86c7SWei Liu path->size = 0; 18060ce86c7SWei Liu } 18160ce86c7SWei Liu 18260ce86c7SWei Liu void v9fs_path_copy(V9fsPath *lhs, V9fsPath *rhs) 18360ce86c7SWei Liu { 18460ce86c7SWei Liu v9fs_path_free(lhs); 18560ce86c7SWei Liu lhs->data = g_malloc(rhs->size); 18660ce86c7SWei Liu memcpy(lhs->data, rhs->data, rhs->size); 18760ce86c7SWei Liu lhs->size = rhs->size; 18860ce86c7SWei Liu } 18960ce86c7SWei Liu 19060ce86c7SWei Liu int v9fs_name_to_path(V9fsState *s, V9fsPath *dirpath, 19160ce86c7SWei Liu const char *name, V9fsPath *path) 19260ce86c7SWei Liu { 19360ce86c7SWei Liu int err; 19460ce86c7SWei Liu err = s->ops->name_to_path(&s->ctx, dirpath, name, path); 19560ce86c7SWei Liu if (err < 0) { 19660ce86c7SWei Liu err = -errno; 19760ce86c7SWei Liu } 19860ce86c7SWei Liu return err; 19960ce86c7SWei Liu } 20060ce86c7SWei Liu 20160ce86c7SWei Liu /* 20260ce86c7SWei Liu * Return TRUE if s1 is an ancestor of s2. 20360ce86c7SWei Liu * 20460ce86c7SWei Liu * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". 20560ce86c7SWei Liu * As a special case, We treat s1 as ancestor of s2 if they are same! 20660ce86c7SWei Liu */ 20760ce86c7SWei Liu static int v9fs_path_is_ancestor(V9fsPath *s1, V9fsPath *s2) 20860ce86c7SWei Liu { 20960ce86c7SWei Liu if (!strncmp(s1->data, s2->data, s1->size - 1)) { 21060ce86c7SWei Liu if (s2->data[s1->size - 1] == '\0' || s2->data[s1->size - 1] == '/') { 21160ce86c7SWei Liu return 1; 21260ce86c7SWei Liu } 21360ce86c7SWei Liu } 21460ce86c7SWei Liu return 0; 21560ce86c7SWei Liu } 21660ce86c7SWei Liu 21760ce86c7SWei Liu static size_t v9fs_string_size(V9fsString *str) 21860ce86c7SWei Liu { 21960ce86c7SWei Liu return str->size; 22060ce86c7SWei Liu } 22160ce86c7SWei Liu 22260ce86c7SWei Liu /* 22360ce86c7SWei Liu * returns 0 if fid got re-opened, 1 if not, < 0 on error */ 22460ce86c7SWei Liu static int v9fs_reopen_fid(V9fsPDU *pdu, V9fsFidState *f) 22560ce86c7SWei Liu { 22660ce86c7SWei Liu int err = 1; 22760ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 22860ce86c7SWei Liu if (f->fs.fd == -1) { 22960ce86c7SWei Liu do { 23060ce86c7SWei Liu err = v9fs_co_open(pdu, f, f->open_flags); 23160ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 23260ce86c7SWei Liu } 23360ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 234f314ea4eSGreg Kurz if (f->fs.dir.stream == NULL) { 23560ce86c7SWei Liu do { 23660ce86c7SWei Liu err = v9fs_co_opendir(pdu, f); 23760ce86c7SWei Liu } while (err == -EINTR && !pdu->cancelled); 23860ce86c7SWei Liu } 23960ce86c7SWei Liu } 24060ce86c7SWei Liu return err; 24160ce86c7SWei Liu } 24260ce86c7SWei Liu 24360ce86c7SWei Liu static V9fsFidState *get_fid(V9fsPDU *pdu, int32_t fid) 24460ce86c7SWei Liu { 24560ce86c7SWei Liu int err; 24660ce86c7SWei Liu V9fsFidState *f; 24760ce86c7SWei Liu V9fsState *s = pdu->s; 24860ce86c7SWei Liu 24960ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 25060ce86c7SWei Liu BUG_ON(f->clunked); 25160ce86c7SWei Liu if (f->fid == fid) { 25260ce86c7SWei Liu /* 25360ce86c7SWei Liu * Update the fid ref upfront so that 25460ce86c7SWei Liu * we don't get reclaimed when we yield 25560ce86c7SWei Liu * in open later. 25660ce86c7SWei Liu */ 25760ce86c7SWei Liu f->ref++; 25860ce86c7SWei Liu /* 25960ce86c7SWei Liu * check whether we need to reopen the 26060ce86c7SWei Liu * file. We might have closed the fd 26160ce86c7SWei Liu * while trying to free up some file 26260ce86c7SWei Liu * descriptors. 26360ce86c7SWei Liu */ 26460ce86c7SWei Liu err = v9fs_reopen_fid(pdu, f); 26560ce86c7SWei Liu if (err < 0) { 26660ce86c7SWei Liu f->ref--; 26760ce86c7SWei Liu return NULL; 26860ce86c7SWei Liu } 26960ce86c7SWei Liu /* 27060ce86c7SWei Liu * Mark the fid as referenced so that the LRU 27160ce86c7SWei Liu * reclaim won't close the file descriptor 27260ce86c7SWei Liu */ 27360ce86c7SWei Liu f->flags |= FID_REFERENCED; 27460ce86c7SWei Liu return f; 27560ce86c7SWei Liu } 27660ce86c7SWei Liu } 27760ce86c7SWei Liu return NULL; 27860ce86c7SWei Liu } 27960ce86c7SWei Liu 28060ce86c7SWei Liu static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) 28160ce86c7SWei Liu { 28260ce86c7SWei Liu V9fsFidState *f; 28360ce86c7SWei Liu 28460ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 28560ce86c7SWei Liu /* If fid is already there return NULL */ 28660ce86c7SWei Liu BUG_ON(f->clunked); 28760ce86c7SWei Liu if (f->fid == fid) { 28860ce86c7SWei Liu return NULL; 28960ce86c7SWei Liu } 29060ce86c7SWei Liu } 29160ce86c7SWei Liu f = g_malloc0(sizeof(V9fsFidState)); 29260ce86c7SWei Liu f->fid = fid; 29360ce86c7SWei Liu f->fid_type = P9_FID_NONE; 29460ce86c7SWei Liu f->ref = 1; 29560ce86c7SWei Liu /* 29660ce86c7SWei Liu * Mark the fid as referenced so that the LRU 29760ce86c7SWei Liu * reclaim won't close the file descriptor 29860ce86c7SWei Liu */ 29960ce86c7SWei Liu f->flags |= FID_REFERENCED; 30060ce86c7SWei Liu f->next = s->fid_list; 30160ce86c7SWei Liu s->fid_list = f; 30260ce86c7SWei Liu 3037cde47d4SGreg Kurz v9fs_readdir_init(&f->fs.dir); 3047cde47d4SGreg Kurz v9fs_readdir_init(&f->fs_reclaim.dir); 3057cde47d4SGreg Kurz 30660ce86c7SWei Liu return f; 30760ce86c7SWei Liu } 30860ce86c7SWei Liu 30960ce86c7SWei Liu static int v9fs_xattr_fid_clunk(V9fsPDU *pdu, V9fsFidState *fidp) 31060ce86c7SWei Liu { 31160ce86c7SWei Liu int retval = 0; 31260ce86c7SWei Liu 31360ce86c7SWei Liu if (fidp->fs.xattr.copied_len == -1) { 31460ce86c7SWei Liu /* getxattr/listxattr fid */ 31560ce86c7SWei Liu goto free_value; 31660ce86c7SWei Liu } 31760ce86c7SWei Liu /* 31860ce86c7SWei Liu * if this is fid for setxattr. clunk should 31960ce86c7SWei Liu * result in setxattr localcall 32060ce86c7SWei Liu */ 32160ce86c7SWei Liu if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { 32260ce86c7SWei Liu /* clunk after partial write */ 32360ce86c7SWei Liu retval = -EINVAL; 32460ce86c7SWei Liu goto free_out; 32560ce86c7SWei Liu } 32660ce86c7SWei Liu if (fidp->fs.xattr.len) { 32760ce86c7SWei Liu retval = v9fs_co_lsetxattr(pdu, &fidp->path, &fidp->fs.xattr.name, 32860ce86c7SWei Liu fidp->fs.xattr.value, 32960ce86c7SWei Liu fidp->fs.xattr.len, 33060ce86c7SWei Liu fidp->fs.xattr.flags); 33160ce86c7SWei Liu } else { 33260ce86c7SWei Liu retval = v9fs_co_lremovexattr(pdu, &fidp->path, &fidp->fs.xattr.name); 33360ce86c7SWei Liu } 33460ce86c7SWei Liu free_out: 33560ce86c7SWei Liu v9fs_string_free(&fidp->fs.xattr.name); 33660ce86c7SWei Liu free_value: 33760ce86c7SWei Liu g_free(fidp->fs.xattr.value); 33860ce86c7SWei Liu return retval; 33960ce86c7SWei Liu } 34060ce86c7SWei Liu 34160ce86c7SWei Liu static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp) 34260ce86c7SWei Liu { 34360ce86c7SWei Liu int retval = 0; 34460ce86c7SWei Liu 34560ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 34660ce86c7SWei Liu /* If we reclaimed the fd no need to close */ 34760ce86c7SWei Liu if (fidp->fs.fd != -1) { 34860ce86c7SWei Liu retval = v9fs_co_close(pdu, &fidp->fs); 34960ce86c7SWei Liu } 35060ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_DIR) { 351f314ea4eSGreg Kurz if (fidp->fs.dir.stream != NULL) { 35260ce86c7SWei Liu retval = v9fs_co_closedir(pdu, &fidp->fs); 35360ce86c7SWei Liu } 35460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 35560ce86c7SWei Liu retval = v9fs_xattr_fid_clunk(pdu, fidp); 35660ce86c7SWei Liu } 35760ce86c7SWei Liu v9fs_path_free(&fidp->path); 35860ce86c7SWei Liu g_free(fidp); 35960ce86c7SWei Liu return retval; 36060ce86c7SWei Liu } 36160ce86c7SWei Liu 36260ce86c7SWei Liu static int put_fid(V9fsPDU *pdu, V9fsFidState *fidp) 36360ce86c7SWei Liu { 36460ce86c7SWei Liu BUG_ON(!fidp->ref); 36560ce86c7SWei Liu fidp->ref--; 36660ce86c7SWei Liu /* 36760ce86c7SWei Liu * Don't free the fid if it is in reclaim list 36860ce86c7SWei Liu */ 36960ce86c7SWei Liu if (!fidp->ref && fidp->clunked) { 37060ce86c7SWei Liu if (fidp->fid == pdu->s->root_fid) { 37160ce86c7SWei Liu /* 37260ce86c7SWei Liu * if the clunked fid is root fid then we 37360ce86c7SWei Liu * have unmounted the fs on the client side. 37460ce86c7SWei Liu * delete the migration blocker. Ideally, this 37560ce86c7SWei Liu * should be hooked to transport close notification 37660ce86c7SWei Liu */ 37760ce86c7SWei Liu if (pdu->s->migration_blocker) { 37860ce86c7SWei Liu migrate_del_blocker(pdu->s->migration_blocker); 37960ce86c7SWei Liu error_free(pdu->s->migration_blocker); 38060ce86c7SWei Liu pdu->s->migration_blocker = NULL; 38160ce86c7SWei Liu } 38260ce86c7SWei Liu } 38360ce86c7SWei Liu return free_fid(pdu, fidp); 38460ce86c7SWei Liu } 38560ce86c7SWei Liu return 0; 38660ce86c7SWei Liu } 38760ce86c7SWei Liu 38860ce86c7SWei Liu static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid) 38960ce86c7SWei Liu { 39060ce86c7SWei Liu V9fsFidState **fidpp, *fidp; 39160ce86c7SWei Liu 39260ce86c7SWei Liu for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { 39360ce86c7SWei Liu if ((*fidpp)->fid == fid) { 39460ce86c7SWei Liu break; 39560ce86c7SWei Liu } 39660ce86c7SWei Liu } 39760ce86c7SWei Liu if (*fidpp == NULL) { 39860ce86c7SWei Liu return NULL; 39960ce86c7SWei Liu } 40060ce86c7SWei Liu fidp = *fidpp; 40160ce86c7SWei Liu *fidpp = fidp->next; 40260ce86c7SWei Liu fidp->clunked = 1; 40360ce86c7SWei Liu return fidp; 40460ce86c7SWei Liu } 40560ce86c7SWei Liu 40660ce86c7SWei Liu void v9fs_reclaim_fd(V9fsPDU *pdu) 40760ce86c7SWei Liu { 40860ce86c7SWei Liu int reclaim_count = 0; 40960ce86c7SWei Liu V9fsState *s = pdu->s; 41060ce86c7SWei Liu V9fsFidState *f, *reclaim_list = NULL; 41160ce86c7SWei Liu 41260ce86c7SWei Liu for (f = s->fid_list; f; f = f->next) { 41360ce86c7SWei Liu /* 41460ce86c7SWei Liu * Unlink fids cannot be reclaimed. Check 41560ce86c7SWei Liu * for them and skip them. Also skip fids 41660ce86c7SWei Liu * currently being operated on. 41760ce86c7SWei Liu */ 41860ce86c7SWei Liu if (f->ref || f->flags & FID_NON_RECLAIMABLE) { 41960ce86c7SWei Liu continue; 42060ce86c7SWei Liu } 42160ce86c7SWei Liu /* 42260ce86c7SWei Liu * if it is a recently referenced fid 42360ce86c7SWei Liu * we leave the fid untouched and clear the 42460ce86c7SWei Liu * reference bit. We come back to it later 42560ce86c7SWei Liu * in the next iteration. (a simple LRU without 42660ce86c7SWei Liu * moving list elements around) 42760ce86c7SWei Liu */ 42860ce86c7SWei Liu if (f->flags & FID_REFERENCED) { 42960ce86c7SWei Liu f->flags &= ~FID_REFERENCED; 43060ce86c7SWei Liu continue; 43160ce86c7SWei Liu } 43260ce86c7SWei Liu /* 43360ce86c7SWei Liu * Add fids to reclaim list. 43460ce86c7SWei Liu */ 43560ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 43660ce86c7SWei Liu if (f->fs.fd != -1) { 43760ce86c7SWei Liu /* 43860ce86c7SWei Liu * Up the reference count so that 43960ce86c7SWei Liu * a clunk request won't free this fid 44060ce86c7SWei Liu */ 44160ce86c7SWei Liu f->ref++; 44260ce86c7SWei Liu f->rclm_lst = reclaim_list; 44360ce86c7SWei Liu reclaim_list = f; 44460ce86c7SWei Liu f->fs_reclaim.fd = f->fs.fd; 44560ce86c7SWei Liu f->fs.fd = -1; 44660ce86c7SWei Liu reclaim_count++; 44760ce86c7SWei Liu } 44860ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 449f314ea4eSGreg Kurz if (f->fs.dir.stream != NULL) { 45060ce86c7SWei Liu /* 45160ce86c7SWei Liu * Up the reference count so that 45260ce86c7SWei Liu * a clunk request won't free this fid 45360ce86c7SWei Liu */ 45460ce86c7SWei Liu f->ref++; 45560ce86c7SWei Liu f->rclm_lst = reclaim_list; 45660ce86c7SWei Liu reclaim_list = f; 457f314ea4eSGreg Kurz f->fs_reclaim.dir.stream = f->fs.dir.stream; 458f314ea4eSGreg Kurz f->fs.dir.stream = NULL; 45960ce86c7SWei Liu reclaim_count++; 46060ce86c7SWei Liu } 46160ce86c7SWei Liu } 46260ce86c7SWei Liu if (reclaim_count >= open_fd_rc) { 46360ce86c7SWei Liu break; 46460ce86c7SWei Liu } 46560ce86c7SWei Liu } 46660ce86c7SWei Liu /* 46760ce86c7SWei Liu * Now close the fid in reclaim list. Free them if they 46860ce86c7SWei Liu * are already clunked. 46960ce86c7SWei Liu */ 47060ce86c7SWei Liu while (reclaim_list) { 47160ce86c7SWei Liu f = reclaim_list; 47260ce86c7SWei Liu reclaim_list = f->rclm_lst; 47360ce86c7SWei Liu if (f->fid_type == P9_FID_FILE) { 47460ce86c7SWei Liu v9fs_co_close(pdu, &f->fs_reclaim); 47560ce86c7SWei Liu } else if (f->fid_type == P9_FID_DIR) { 47660ce86c7SWei Liu v9fs_co_closedir(pdu, &f->fs_reclaim); 47760ce86c7SWei Liu } 47860ce86c7SWei Liu f->rclm_lst = NULL; 47960ce86c7SWei Liu /* 48060ce86c7SWei Liu * Now drop the fid reference, free it 48160ce86c7SWei Liu * if clunked. 48260ce86c7SWei Liu */ 48360ce86c7SWei Liu put_fid(pdu, f); 48460ce86c7SWei Liu } 48560ce86c7SWei Liu } 48660ce86c7SWei Liu 48760ce86c7SWei Liu static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path) 48860ce86c7SWei Liu { 48960ce86c7SWei Liu int err; 49060ce86c7SWei Liu V9fsState *s = pdu->s; 49160ce86c7SWei Liu V9fsFidState *fidp, head_fid; 49260ce86c7SWei Liu 49360ce86c7SWei Liu head_fid.next = s->fid_list; 49460ce86c7SWei Liu for (fidp = s->fid_list; fidp; fidp = fidp->next) { 49560ce86c7SWei Liu if (fidp->path.size != path->size) { 49660ce86c7SWei Liu continue; 49760ce86c7SWei Liu } 49860ce86c7SWei Liu if (!memcmp(fidp->path.data, path->data, path->size)) { 49960ce86c7SWei Liu /* Mark the fid non reclaimable. */ 50060ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 50160ce86c7SWei Liu 50260ce86c7SWei Liu /* reopen the file/dir if already closed */ 50360ce86c7SWei Liu err = v9fs_reopen_fid(pdu, fidp); 50460ce86c7SWei Liu if (err < 0) { 50560ce86c7SWei Liu return -1; 50660ce86c7SWei Liu } 50760ce86c7SWei Liu /* 50860ce86c7SWei Liu * Go back to head of fid list because 50960ce86c7SWei Liu * the list could have got updated when 51060ce86c7SWei Liu * switched to the worker thread 51160ce86c7SWei Liu */ 51260ce86c7SWei Liu if (err == 0) { 51360ce86c7SWei Liu fidp = &head_fid; 51460ce86c7SWei Liu } 51560ce86c7SWei Liu } 51660ce86c7SWei Liu } 51760ce86c7SWei Liu return 0; 51860ce86c7SWei Liu } 51960ce86c7SWei Liu 52060ce86c7SWei Liu static void virtfs_reset(V9fsPDU *pdu) 52160ce86c7SWei Liu { 52260ce86c7SWei Liu V9fsState *s = pdu->s; 52360ce86c7SWei Liu V9fsFidState *fidp = NULL; 52460ce86c7SWei Liu 52560ce86c7SWei Liu /* Free all fids */ 52660ce86c7SWei Liu while (s->fid_list) { 52760ce86c7SWei Liu fidp = s->fid_list; 52860ce86c7SWei Liu s->fid_list = fidp->next; 52960ce86c7SWei Liu 53060ce86c7SWei Liu if (fidp->ref) { 53160ce86c7SWei Liu fidp->clunked = 1; 53260ce86c7SWei Liu } else { 53360ce86c7SWei Liu free_fid(pdu, fidp); 53460ce86c7SWei Liu } 53560ce86c7SWei Liu } 53660ce86c7SWei Liu if (fidp) { 53760ce86c7SWei Liu /* One or more unclunked fids found... */ 53860ce86c7SWei Liu error_report("9pfs:%s: One or more uncluncked fids " 53960ce86c7SWei Liu "found during reset", __func__); 54060ce86c7SWei Liu } 54160ce86c7SWei Liu } 54260ce86c7SWei Liu 54360ce86c7SWei Liu #define P9_QID_TYPE_DIR 0x80 54460ce86c7SWei Liu #define P9_QID_TYPE_SYMLINK 0x02 54560ce86c7SWei Liu 54660ce86c7SWei Liu #define P9_STAT_MODE_DIR 0x80000000 54760ce86c7SWei Liu #define P9_STAT_MODE_APPEND 0x40000000 54860ce86c7SWei Liu #define P9_STAT_MODE_EXCL 0x20000000 54960ce86c7SWei Liu #define P9_STAT_MODE_MOUNT 0x10000000 55060ce86c7SWei Liu #define P9_STAT_MODE_AUTH 0x08000000 55160ce86c7SWei Liu #define P9_STAT_MODE_TMP 0x04000000 55260ce86c7SWei Liu #define P9_STAT_MODE_SYMLINK 0x02000000 55360ce86c7SWei Liu #define P9_STAT_MODE_LINK 0x01000000 55460ce86c7SWei Liu #define P9_STAT_MODE_DEVICE 0x00800000 55560ce86c7SWei Liu #define P9_STAT_MODE_NAMED_PIPE 0x00200000 55660ce86c7SWei Liu #define P9_STAT_MODE_SOCKET 0x00100000 55760ce86c7SWei Liu #define P9_STAT_MODE_SETUID 0x00080000 55860ce86c7SWei Liu #define P9_STAT_MODE_SETGID 0x00040000 55960ce86c7SWei Liu #define P9_STAT_MODE_SETVTX 0x00010000 56060ce86c7SWei Liu 56160ce86c7SWei Liu #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ 56260ce86c7SWei Liu P9_STAT_MODE_SYMLINK | \ 56360ce86c7SWei Liu P9_STAT_MODE_LINK | \ 56460ce86c7SWei Liu P9_STAT_MODE_DEVICE | \ 56560ce86c7SWei Liu P9_STAT_MODE_NAMED_PIPE | \ 56660ce86c7SWei Liu P9_STAT_MODE_SOCKET) 56760ce86c7SWei Liu 56860ce86c7SWei Liu /* This is the algorithm from ufs in spfs */ 56960ce86c7SWei Liu static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) 57060ce86c7SWei Liu { 57160ce86c7SWei Liu size_t size; 57260ce86c7SWei Liu 57360ce86c7SWei Liu memset(&qidp->path, 0, sizeof(qidp->path)); 57460ce86c7SWei Liu size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); 57560ce86c7SWei Liu memcpy(&qidp->path, &stbuf->st_ino, size); 57660ce86c7SWei Liu qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); 57760ce86c7SWei Liu qidp->type = 0; 57860ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 57960ce86c7SWei Liu qidp->type |= P9_QID_TYPE_DIR; 58060ce86c7SWei Liu } 58160ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 58260ce86c7SWei Liu qidp->type |= P9_QID_TYPE_SYMLINK; 58360ce86c7SWei Liu } 58460ce86c7SWei Liu } 58560ce86c7SWei Liu 58660ce86c7SWei Liu static int fid_to_qid(V9fsPDU *pdu, V9fsFidState *fidp, V9fsQID *qidp) 58760ce86c7SWei Liu { 58860ce86c7SWei Liu struct stat stbuf; 58960ce86c7SWei Liu int err; 59060ce86c7SWei Liu 59160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 59260ce86c7SWei Liu if (err < 0) { 59360ce86c7SWei Liu return err; 59460ce86c7SWei Liu } 59560ce86c7SWei Liu stat_to_qid(&stbuf, qidp); 59660ce86c7SWei Liu return 0; 59760ce86c7SWei Liu } 59860ce86c7SWei Liu 59960ce86c7SWei Liu V9fsPDU *pdu_alloc(V9fsState *s) 60060ce86c7SWei Liu { 60160ce86c7SWei Liu V9fsPDU *pdu = NULL; 60260ce86c7SWei Liu 60360ce86c7SWei Liu if (!QLIST_EMPTY(&s->free_list)) { 60460ce86c7SWei Liu pdu = QLIST_FIRST(&s->free_list); 60560ce86c7SWei Liu QLIST_REMOVE(pdu, next); 60660ce86c7SWei Liu QLIST_INSERT_HEAD(&s->active_list, pdu, next); 60760ce86c7SWei Liu } 60860ce86c7SWei Liu return pdu; 60960ce86c7SWei Liu } 61060ce86c7SWei Liu 61160ce86c7SWei Liu void pdu_free(V9fsPDU *pdu) 61260ce86c7SWei Liu { 61360ce86c7SWei Liu if (pdu) { 61460ce86c7SWei Liu V9fsState *s = pdu->s; 61560ce86c7SWei Liu /* 61660ce86c7SWei Liu * Cancelled pdu are added back to the freelist 61760ce86c7SWei Liu * by flush request . 61860ce86c7SWei Liu */ 61960ce86c7SWei Liu if (!pdu->cancelled) { 62060ce86c7SWei Liu QLIST_REMOVE(pdu, next); 62160ce86c7SWei Liu QLIST_INSERT_HEAD(&s->free_list, pdu, next); 62260ce86c7SWei Liu } 62360ce86c7SWei Liu } 62460ce86c7SWei Liu } 62560ce86c7SWei Liu 62660ce86c7SWei Liu /* 62760ce86c7SWei Liu * We don't do error checking for pdu_marshal/unmarshal here 62860ce86c7SWei Liu * because we always expect to have enough space to encode 62960ce86c7SWei Liu * error details 63060ce86c7SWei Liu */ 63160ce86c7SWei Liu static void pdu_complete(V9fsPDU *pdu, ssize_t len) 63260ce86c7SWei Liu { 63360ce86c7SWei Liu int8_t id = pdu->id + 1; /* Response */ 63460ce86c7SWei Liu V9fsState *s = pdu->s; 63560ce86c7SWei Liu 63660ce86c7SWei Liu if (len < 0) { 63760ce86c7SWei Liu int err = -len; 63860ce86c7SWei Liu len = 7; 63960ce86c7SWei Liu 64060ce86c7SWei Liu if (s->proto_version != V9FS_PROTO_2000L) { 64160ce86c7SWei Liu V9fsString str; 64260ce86c7SWei Liu 64360ce86c7SWei Liu str.data = strerror(err); 64460ce86c7SWei Liu str.size = strlen(str.data); 64560ce86c7SWei Liu 64660ce86c7SWei Liu len += pdu_marshal(pdu, len, "s", &str); 64760ce86c7SWei Liu id = P9_RERROR; 64860ce86c7SWei Liu } 64960ce86c7SWei Liu 65060ce86c7SWei Liu len += pdu_marshal(pdu, len, "d", err); 65160ce86c7SWei Liu 65260ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 65360ce86c7SWei Liu id = P9_RLERROR; 65460ce86c7SWei Liu } 65560ce86c7SWei Liu trace_v9fs_rerror(pdu->tag, pdu->id, err); /* Trace ERROR */ 65660ce86c7SWei Liu } 65760ce86c7SWei Liu 65860ce86c7SWei Liu /* fill out the header */ 65960ce86c7SWei Liu pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); 66060ce86c7SWei Liu 66160ce86c7SWei Liu /* keep these in sync */ 66260ce86c7SWei Liu pdu->size = len; 66360ce86c7SWei Liu pdu->id = id; 66460ce86c7SWei Liu 66560ce86c7SWei Liu pdu_push_and_notify(pdu); 66660ce86c7SWei Liu 66760ce86c7SWei Liu /* Now wakeup anybody waiting in flush for this request */ 66860ce86c7SWei Liu qemu_co_queue_next(&pdu->complete); 66960ce86c7SWei Liu 67060ce86c7SWei Liu pdu_free(pdu); 67160ce86c7SWei Liu } 67260ce86c7SWei Liu 67360ce86c7SWei Liu static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) 67460ce86c7SWei Liu { 67560ce86c7SWei Liu mode_t ret; 67660ce86c7SWei Liu 67760ce86c7SWei Liu ret = mode & 0777; 67860ce86c7SWei Liu if (mode & P9_STAT_MODE_DIR) { 67960ce86c7SWei Liu ret |= S_IFDIR; 68060ce86c7SWei Liu } 68160ce86c7SWei Liu 68260ce86c7SWei Liu if (mode & P9_STAT_MODE_SYMLINK) { 68360ce86c7SWei Liu ret |= S_IFLNK; 68460ce86c7SWei Liu } 68560ce86c7SWei Liu if (mode & P9_STAT_MODE_SOCKET) { 68660ce86c7SWei Liu ret |= S_IFSOCK; 68760ce86c7SWei Liu } 68860ce86c7SWei Liu if (mode & P9_STAT_MODE_NAMED_PIPE) { 68960ce86c7SWei Liu ret |= S_IFIFO; 69060ce86c7SWei Liu } 69160ce86c7SWei Liu if (mode & P9_STAT_MODE_DEVICE) { 69260ce86c7SWei Liu if (extension->size && extension->data[0] == 'c') { 69360ce86c7SWei Liu ret |= S_IFCHR; 69460ce86c7SWei Liu } else { 69560ce86c7SWei Liu ret |= S_IFBLK; 69660ce86c7SWei Liu } 69760ce86c7SWei Liu } 69860ce86c7SWei Liu 69960ce86c7SWei Liu if (!(ret&~0777)) { 70060ce86c7SWei Liu ret |= S_IFREG; 70160ce86c7SWei Liu } 70260ce86c7SWei Liu 70360ce86c7SWei Liu if (mode & P9_STAT_MODE_SETUID) { 70460ce86c7SWei Liu ret |= S_ISUID; 70560ce86c7SWei Liu } 70660ce86c7SWei Liu if (mode & P9_STAT_MODE_SETGID) { 70760ce86c7SWei Liu ret |= S_ISGID; 70860ce86c7SWei Liu } 70960ce86c7SWei Liu if (mode & P9_STAT_MODE_SETVTX) { 71060ce86c7SWei Liu ret |= S_ISVTX; 71160ce86c7SWei Liu } 71260ce86c7SWei Liu 71360ce86c7SWei Liu return ret; 71460ce86c7SWei Liu } 71560ce86c7SWei Liu 71660ce86c7SWei Liu static int donttouch_stat(V9fsStat *stat) 71760ce86c7SWei Liu { 71860ce86c7SWei Liu if (stat->type == -1 && 71960ce86c7SWei Liu stat->dev == -1 && 72060ce86c7SWei Liu stat->qid.type == -1 && 72160ce86c7SWei Liu stat->qid.version == -1 && 72260ce86c7SWei Liu stat->qid.path == -1 && 72360ce86c7SWei Liu stat->mode == -1 && 72460ce86c7SWei Liu stat->atime == -1 && 72560ce86c7SWei Liu stat->mtime == -1 && 72660ce86c7SWei Liu stat->length == -1 && 72760ce86c7SWei Liu !stat->name.size && 72860ce86c7SWei Liu !stat->uid.size && 72960ce86c7SWei Liu !stat->gid.size && 73060ce86c7SWei Liu !stat->muid.size && 73160ce86c7SWei Liu stat->n_uid == -1 && 73260ce86c7SWei Liu stat->n_gid == -1 && 73360ce86c7SWei Liu stat->n_muid == -1) { 73460ce86c7SWei Liu return 1; 73560ce86c7SWei Liu } 73660ce86c7SWei Liu 73760ce86c7SWei Liu return 0; 73860ce86c7SWei Liu } 73960ce86c7SWei Liu 74060ce86c7SWei Liu static void v9fs_stat_init(V9fsStat *stat) 74160ce86c7SWei Liu { 74260ce86c7SWei Liu v9fs_string_init(&stat->name); 74360ce86c7SWei Liu v9fs_string_init(&stat->uid); 74460ce86c7SWei Liu v9fs_string_init(&stat->gid); 74560ce86c7SWei Liu v9fs_string_init(&stat->muid); 74660ce86c7SWei Liu v9fs_string_init(&stat->extension); 74760ce86c7SWei Liu } 74860ce86c7SWei Liu 74960ce86c7SWei Liu static void v9fs_stat_free(V9fsStat *stat) 75060ce86c7SWei Liu { 75160ce86c7SWei Liu v9fs_string_free(&stat->name); 75260ce86c7SWei Liu v9fs_string_free(&stat->uid); 75360ce86c7SWei Liu v9fs_string_free(&stat->gid); 75460ce86c7SWei Liu v9fs_string_free(&stat->muid); 75560ce86c7SWei Liu v9fs_string_free(&stat->extension); 75660ce86c7SWei Liu } 75760ce86c7SWei Liu 75860ce86c7SWei Liu static uint32_t stat_to_v9mode(const struct stat *stbuf) 75960ce86c7SWei Liu { 76060ce86c7SWei Liu uint32_t mode; 76160ce86c7SWei Liu 76260ce86c7SWei Liu mode = stbuf->st_mode & 0777; 76360ce86c7SWei Liu if (S_ISDIR(stbuf->st_mode)) { 76460ce86c7SWei Liu mode |= P9_STAT_MODE_DIR; 76560ce86c7SWei Liu } 76660ce86c7SWei Liu 76760ce86c7SWei Liu if (S_ISLNK(stbuf->st_mode)) { 76860ce86c7SWei Liu mode |= P9_STAT_MODE_SYMLINK; 76960ce86c7SWei Liu } 77060ce86c7SWei Liu 77160ce86c7SWei Liu if (S_ISSOCK(stbuf->st_mode)) { 77260ce86c7SWei Liu mode |= P9_STAT_MODE_SOCKET; 77360ce86c7SWei Liu } 77460ce86c7SWei Liu 77560ce86c7SWei Liu if (S_ISFIFO(stbuf->st_mode)) { 77660ce86c7SWei Liu mode |= P9_STAT_MODE_NAMED_PIPE; 77760ce86c7SWei Liu } 77860ce86c7SWei Liu 77960ce86c7SWei Liu if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { 78060ce86c7SWei Liu mode |= P9_STAT_MODE_DEVICE; 78160ce86c7SWei Liu } 78260ce86c7SWei Liu 78360ce86c7SWei Liu if (stbuf->st_mode & S_ISUID) { 78460ce86c7SWei Liu mode |= P9_STAT_MODE_SETUID; 78560ce86c7SWei Liu } 78660ce86c7SWei Liu 78760ce86c7SWei Liu if (stbuf->st_mode & S_ISGID) { 78860ce86c7SWei Liu mode |= P9_STAT_MODE_SETGID; 78960ce86c7SWei Liu } 79060ce86c7SWei Liu 79160ce86c7SWei Liu if (stbuf->st_mode & S_ISVTX) { 79260ce86c7SWei Liu mode |= P9_STAT_MODE_SETVTX; 79360ce86c7SWei Liu } 79460ce86c7SWei Liu 79560ce86c7SWei Liu return mode; 79660ce86c7SWei Liu } 79760ce86c7SWei Liu 79860ce86c7SWei Liu static int stat_to_v9stat(V9fsPDU *pdu, V9fsPath *name, 79960ce86c7SWei Liu const struct stat *stbuf, 80060ce86c7SWei Liu V9fsStat *v9stat) 80160ce86c7SWei Liu { 80260ce86c7SWei Liu int err; 80360ce86c7SWei Liu const char *str; 80460ce86c7SWei Liu 80560ce86c7SWei Liu memset(v9stat, 0, sizeof(*v9stat)); 80660ce86c7SWei Liu 80760ce86c7SWei Liu stat_to_qid(stbuf, &v9stat->qid); 80860ce86c7SWei Liu v9stat->mode = stat_to_v9mode(stbuf); 80960ce86c7SWei Liu v9stat->atime = stbuf->st_atime; 81060ce86c7SWei Liu v9stat->mtime = stbuf->st_mtime; 81160ce86c7SWei Liu v9stat->length = stbuf->st_size; 81260ce86c7SWei Liu 81360ce86c7SWei Liu v9fs_string_null(&v9stat->uid); 81460ce86c7SWei Liu v9fs_string_null(&v9stat->gid); 81560ce86c7SWei Liu v9fs_string_null(&v9stat->muid); 81660ce86c7SWei Liu 81760ce86c7SWei Liu v9stat->n_uid = stbuf->st_uid; 81860ce86c7SWei Liu v9stat->n_gid = stbuf->st_gid; 81960ce86c7SWei Liu v9stat->n_muid = 0; 82060ce86c7SWei Liu 82160ce86c7SWei Liu v9fs_string_null(&v9stat->extension); 82260ce86c7SWei Liu 82360ce86c7SWei Liu if (v9stat->mode & P9_STAT_MODE_SYMLINK) { 82460ce86c7SWei Liu err = v9fs_co_readlink(pdu, name, &v9stat->extension); 82560ce86c7SWei Liu if (err < 0) { 82660ce86c7SWei Liu return err; 82760ce86c7SWei Liu } 82860ce86c7SWei Liu } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { 82960ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%c %u %u", 83060ce86c7SWei Liu S_ISCHR(stbuf->st_mode) ? 'c' : 'b', 83160ce86c7SWei Liu major(stbuf->st_rdev), minor(stbuf->st_rdev)); 83260ce86c7SWei Liu } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { 83360ce86c7SWei Liu v9fs_string_sprintf(&v9stat->extension, "%s %lu", 83460ce86c7SWei Liu "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); 83560ce86c7SWei Liu } 83660ce86c7SWei Liu 83760ce86c7SWei Liu str = strrchr(name->data, '/'); 83860ce86c7SWei Liu if (str) { 83960ce86c7SWei Liu str += 1; 84060ce86c7SWei Liu } else { 84160ce86c7SWei Liu str = name->data; 84260ce86c7SWei Liu } 84360ce86c7SWei Liu 84460ce86c7SWei Liu v9fs_string_sprintf(&v9stat->name, "%s", str); 84560ce86c7SWei Liu 84660ce86c7SWei Liu v9stat->size = 61 + 84760ce86c7SWei Liu v9fs_string_size(&v9stat->name) + 84860ce86c7SWei Liu v9fs_string_size(&v9stat->uid) + 84960ce86c7SWei Liu v9fs_string_size(&v9stat->gid) + 85060ce86c7SWei Liu v9fs_string_size(&v9stat->muid) + 85160ce86c7SWei Liu v9fs_string_size(&v9stat->extension); 85260ce86c7SWei Liu return 0; 85360ce86c7SWei Liu } 85460ce86c7SWei Liu 85560ce86c7SWei Liu #define P9_STATS_MODE 0x00000001ULL 85660ce86c7SWei Liu #define P9_STATS_NLINK 0x00000002ULL 85760ce86c7SWei Liu #define P9_STATS_UID 0x00000004ULL 85860ce86c7SWei Liu #define P9_STATS_GID 0x00000008ULL 85960ce86c7SWei Liu #define P9_STATS_RDEV 0x00000010ULL 86060ce86c7SWei Liu #define P9_STATS_ATIME 0x00000020ULL 86160ce86c7SWei Liu #define P9_STATS_MTIME 0x00000040ULL 86260ce86c7SWei Liu #define P9_STATS_CTIME 0x00000080ULL 86360ce86c7SWei Liu #define P9_STATS_INO 0x00000100ULL 86460ce86c7SWei Liu #define P9_STATS_SIZE 0x00000200ULL 86560ce86c7SWei Liu #define P9_STATS_BLOCKS 0x00000400ULL 86660ce86c7SWei Liu 86760ce86c7SWei Liu #define P9_STATS_BTIME 0x00000800ULL 86860ce86c7SWei Liu #define P9_STATS_GEN 0x00001000ULL 86960ce86c7SWei Liu #define P9_STATS_DATA_VERSION 0x00002000ULL 87060ce86c7SWei Liu 87160ce86c7SWei Liu #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ 87260ce86c7SWei Liu #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ 87360ce86c7SWei Liu 87460ce86c7SWei Liu 87560ce86c7SWei Liu static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, 87660ce86c7SWei Liu V9fsStatDotl *v9lstat) 87760ce86c7SWei Liu { 87860ce86c7SWei Liu memset(v9lstat, 0, sizeof(*v9lstat)); 87960ce86c7SWei Liu 88060ce86c7SWei Liu v9lstat->st_mode = stbuf->st_mode; 88160ce86c7SWei Liu v9lstat->st_nlink = stbuf->st_nlink; 88260ce86c7SWei Liu v9lstat->st_uid = stbuf->st_uid; 88360ce86c7SWei Liu v9lstat->st_gid = stbuf->st_gid; 88460ce86c7SWei Liu v9lstat->st_rdev = stbuf->st_rdev; 88560ce86c7SWei Liu v9lstat->st_size = stbuf->st_size; 88660ce86c7SWei Liu v9lstat->st_blksize = stbuf->st_blksize; 88760ce86c7SWei Liu v9lstat->st_blocks = stbuf->st_blocks; 88860ce86c7SWei Liu v9lstat->st_atime_sec = stbuf->st_atime; 88960ce86c7SWei Liu v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; 89060ce86c7SWei Liu v9lstat->st_mtime_sec = stbuf->st_mtime; 89160ce86c7SWei Liu v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; 89260ce86c7SWei Liu v9lstat->st_ctime_sec = stbuf->st_ctime; 89360ce86c7SWei Liu v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; 89460ce86c7SWei Liu /* Currently we only support BASIC fields in stat */ 89560ce86c7SWei Liu v9lstat->st_result_mask = P9_STATS_BASIC; 89660ce86c7SWei Liu 89760ce86c7SWei Liu stat_to_qid(stbuf, &v9lstat->qid); 89860ce86c7SWei Liu } 89960ce86c7SWei Liu 90060ce86c7SWei Liu static void print_sg(struct iovec *sg, int cnt) 90160ce86c7SWei Liu { 90260ce86c7SWei Liu int i; 90360ce86c7SWei Liu 90460ce86c7SWei Liu printf("sg[%d]: {", cnt); 90560ce86c7SWei Liu for (i = 0; i < cnt; i++) { 90660ce86c7SWei Liu if (i) { 90760ce86c7SWei Liu printf(", "); 90860ce86c7SWei Liu } 90960ce86c7SWei Liu printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); 91060ce86c7SWei Liu } 91160ce86c7SWei Liu printf("}\n"); 91260ce86c7SWei Liu } 91360ce86c7SWei Liu 91460ce86c7SWei Liu /* Will call this only for path name based fid */ 91560ce86c7SWei Liu static void v9fs_fix_path(V9fsPath *dst, V9fsPath *src, int len) 91660ce86c7SWei Liu { 91760ce86c7SWei Liu V9fsPath str; 91860ce86c7SWei Liu v9fs_path_init(&str); 91960ce86c7SWei Liu v9fs_path_copy(&str, dst); 92060ce86c7SWei Liu v9fs_string_sprintf((V9fsString *)dst, "%s%s", src->data, str.data+len); 92160ce86c7SWei Liu v9fs_path_free(&str); 92260ce86c7SWei Liu /* +1 to include terminating NULL */ 92360ce86c7SWei Liu dst->size++; 92460ce86c7SWei Liu } 92560ce86c7SWei Liu 92660ce86c7SWei Liu static inline bool is_ro_export(FsContext *ctx) 92760ce86c7SWei Liu { 92860ce86c7SWei Liu return ctx->export_flags & V9FS_RDONLY; 92960ce86c7SWei Liu } 93060ce86c7SWei Liu 93160ce86c7SWei Liu static void v9fs_version(void *opaque) 93260ce86c7SWei Liu { 93360ce86c7SWei Liu ssize_t err; 93460ce86c7SWei Liu V9fsPDU *pdu = opaque; 93560ce86c7SWei Liu V9fsState *s = pdu->s; 93660ce86c7SWei Liu V9fsString version; 93760ce86c7SWei Liu size_t offset = 7; 93860ce86c7SWei Liu 93960ce86c7SWei Liu v9fs_string_init(&version); 94060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); 94160ce86c7SWei Liu if (err < 0) { 94260ce86c7SWei Liu offset = err; 94360ce86c7SWei Liu goto out; 94460ce86c7SWei Liu } 94560ce86c7SWei Liu trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data); 94660ce86c7SWei Liu 94760ce86c7SWei Liu virtfs_reset(pdu); 94860ce86c7SWei Liu 94960ce86c7SWei Liu if (!strcmp(version.data, "9P2000.u")) { 95060ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000U; 95160ce86c7SWei Liu } else if (!strcmp(version.data, "9P2000.L")) { 95260ce86c7SWei Liu s->proto_version = V9FS_PROTO_2000L; 95360ce86c7SWei Liu } else { 95460ce86c7SWei Liu v9fs_string_sprintf(&version, "unknown"); 95560ce86c7SWei Liu } 95660ce86c7SWei Liu 95760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "ds", s->msize, &version); 95860ce86c7SWei Liu if (err < 0) { 95960ce86c7SWei Liu offset = err; 96060ce86c7SWei Liu goto out; 96160ce86c7SWei Liu } 96260ce86c7SWei Liu offset += err; 96360ce86c7SWei Liu trace_v9fs_version_return(pdu->tag, pdu->id, s->msize, version.data); 96460ce86c7SWei Liu out: 96560ce86c7SWei Liu pdu_complete(pdu, offset); 96660ce86c7SWei Liu v9fs_string_free(&version); 96760ce86c7SWei Liu } 96860ce86c7SWei Liu 96960ce86c7SWei Liu static void v9fs_attach(void *opaque) 97060ce86c7SWei Liu { 97160ce86c7SWei Liu V9fsPDU *pdu = opaque; 97260ce86c7SWei Liu V9fsState *s = pdu->s; 97360ce86c7SWei Liu int32_t fid, afid, n_uname; 97460ce86c7SWei Liu V9fsString uname, aname; 97560ce86c7SWei Liu V9fsFidState *fidp; 97660ce86c7SWei Liu size_t offset = 7; 97760ce86c7SWei Liu V9fsQID qid; 97860ce86c7SWei Liu ssize_t err; 97960ce86c7SWei Liu 98060ce86c7SWei Liu v9fs_string_init(&uname); 98160ce86c7SWei Liu v9fs_string_init(&aname); 98260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddssd", &fid, 98360ce86c7SWei Liu &afid, &uname, &aname, &n_uname); 98460ce86c7SWei Liu if (err < 0) { 98560ce86c7SWei Liu goto out_nofid; 98660ce86c7SWei Liu } 98760ce86c7SWei Liu trace_v9fs_attach(pdu->tag, pdu->id, fid, afid, uname.data, aname.data); 98860ce86c7SWei Liu 98960ce86c7SWei Liu fidp = alloc_fid(s, fid); 99060ce86c7SWei Liu if (fidp == NULL) { 99160ce86c7SWei Liu err = -EINVAL; 99260ce86c7SWei Liu goto out_nofid; 99360ce86c7SWei Liu } 99460ce86c7SWei Liu fidp->uid = n_uname; 99560ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, NULL, "/", &fidp->path); 99660ce86c7SWei Liu if (err < 0) { 99760ce86c7SWei Liu err = -EINVAL; 99860ce86c7SWei Liu clunk_fid(s, fid); 99960ce86c7SWei Liu goto out; 100060ce86c7SWei Liu } 100160ce86c7SWei Liu err = fid_to_qid(pdu, fidp, &qid); 100260ce86c7SWei Liu if (err < 0) { 100360ce86c7SWei Liu err = -EINVAL; 100460ce86c7SWei Liu clunk_fid(s, fid); 100560ce86c7SWei Liu goto out; 100660ce86c7SWei Liu } 100760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 100860ce86c7SWei Liu if (err < 0) { 100960ce86c7SWei Liu clunk_fid(s, fid); 101060ce86c7SWei Liu goto out; 101160ce86c7SWei Liu } 101260ce86c7SWei Liu err += offset; 101360ce86c7SWei Liu trace_v9fs_attach_return(pdu->tag, pdu->id, 101460ce86c7SWei Liu qid.type, qid.version, qid.path); 101560ce86c7SWei Liu /* 101660ce86c7SWei Liu * disable migration if we haven't done already. 101760ce86c7SWei Liu * attach could get called multiple times for the same export. 101860ce86c7SWei Liu */ 101960ce86c7SWei Liu if (!s->migration_blocker) { 102060ce86c7SWei Liu s->root_fid = fid; 102160ce86c7SWei Liu error_setg(&s->migration_blocker, 102260ce86c7SWei Liu "Migration is disabled when VirtFS export path '%s' is mounted in the guest using mount_tag '%s'", 102360ce86c7SWei Liu s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag); 102460ce86c7SWei Liu migrate_add_blocker(s->migration_blocker); 102560ce86c7SWei Liu } 102660ce86c7SWei Liu out: 102760ce86c7SWei Liu put_fid(pdu, fidp); 102860ce86c7SWei Liu out_nofid: 102960ce86c7SWei Liu pdu_complete(pdu, err); 103060ce86c7SWei Liu v9fs_string_free(&uname); 103160ce86c7SWei Liu v9fs_string_free(&aname); 103260ce86c7SWei Liu } 103360ce86c7SWei Liu 103460ce86c7SWei Liu static void v9fs_stat(void *opaque) 103560ce86c7SWei Liu { 103660ce86c7SWei Liu int32_t fid; 103760ce86c7SWei Liu V9fsStat v9stat; 103860ce86c7SWei Liu ssize_t err = 0; 103960ce86c7SWei Liu size_t offset = 7; 104060ce86c7SWei Liu struct stat stbuf; 104160ce86c7SWei Liu V9fsFidState *fidp; 104260ce86c7SWei Liu V9fsPDU *pdu = opaque; 104360ce86c7SWei Liu 104460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 104560ce86c7SWei Liu if (err < 0) { 104660ce86c7SWei Liu goto out_nofid; 104760ce86c7SWei Liu } 104860ce86c7SWei Liu trace_v9fs_stat(pdu->tag, pdu->id, fid); 104960ce86c7SWei Liu 105060ce86c7SWei Liu fidp = get_fid(pdu, fid); 105160ce86c7SWei Liu if (fidp == NULL) { 105260ce86c7SWei Liu err = -ENOENT; 105360ce86c7SWei Liu goto out_nofid; 105460ce86c7SWei Liu } 105560ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 105660ce86c7SWei Liu if (err < 0) { 105760ce86c7SWei Liu goto out; 105860ce86c7SWei Liu } 105960ce86c7SWei Liu err = stat_to_v9stat(pdu, &fidp->path, &stbuf, &v9stat); 106060ce86c7SWei Liu if (err < 0) { 106160ce86c7SWei Liu goto out; 106260ce86c7SWei Liu } 106360ce86c7SWei Liu err = pdu_marshal(pdu, offset, "wS", 0, &v9stat); 106460ce86c7SWei Liu if (err < 0) { 106560ce86c7SWei Liu v9fs_stat_free(&v9stat); 106660ce86c7SWei Liu goto out; 106760ce86c7SWei Liu } 106860ce86c7SWei Liu trace_v9fs_stat_return(pdu->tag, pdu->id, v9stat.mode, 106960ce86c7SWei Liu v9stat.atime, v9stat.mtime, v9stat.length); 107060ce86c7SWei Liu err += offset; 107160ce86c7SWei Liu v9fs_stat_free(&v9stat); 107260ce86c7SWei Liu out: 107360ce86c7SWei Liu put_fid(pdu, fidp); 107460ce86c7SWei Liu out_nofid: 107560ce86c7SWei Liu pdu_complete(pdu, err); 107660ce86c7SWei Liu } 107760ce86c7SWei Liu 107860ce86c7SWei Liu static void v9fs_getattr(void *opaque) 107960ce86c7SWei Liu { 108060ce86c7SWei Liu int32_t fid; 108160ce86c7SWei Liu size_t offset = 7; 108260ce86c7SWei Liu ssize_t retval = 0; 108360ce86c7SWei Liu struct stat stbuf; 108460ce86c7SWei Liu V9fsFidState *fidp; 108560ce86c7SWei Liu uint64_t request_mask; 108660ce86c7SWei Liu V9fsStatDotl v9stat_dotl; 108760ce86c7SWei Liu V9fsPDU *pdu = opaque; 108860ce86c7SWei Liu V9fsState *s = pdu->s; 108960ce86c7SWei Liu 109060ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); 109160ce86c7SWei Liu if (retval < 0) { 109260ce86c7SWei Liu goto out_nofid; 109360ce86c7SWei Liu } 109460ce86c7SWei Liu trace_v9fs_getattr(pdu->tag, pdu->id, fid, request_mask); 109560ce86c7SWei Liu 109660ce86c7SWei Liu fidp = get_fid(pdu, fid); 109760ce86c7SWei Liu if (fidp == NULL) { 109860ce86c7SWei Liu retval = -ENOENT; 109960ce86c7SWei Liu goto out_nofid; 110060ce86c7SWei Liu } 110160ce86c7SWei Liu /* 110260ce86c7SWei Liu * Currently we only support BASIC fields in stat, so there is no 110360ce86c7SWei Liu * need to look at request_mask. 110460ce86c7SWei Liu */ 110560ce86c7SWei Liu retval = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 110660ce86c7SWei Liu if (retval < 0) { 110760ce86c7SWei Liu goto out; 110860ce86c7SWei Liu } 110960ce86c7SWei Liu stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); 111060ce86c7SWei Liu 111160ce86c7SWei Liu /* fill st_gen if requested and supported by underlying fs */ 111260ce86c7SWei Liu if (request_mask & P9_STATS_GEN) { 111360ce86c7SWei Liu retval = v9fs_co_st_gen(pdu, &fidp->path, stbuf.st_mode, &v9stat_dotl); 111460ce86c7SWei Liu switch (retval) { 111560ce86c7SWei Liu case 0: 111660ce86c7SWei Liu /* we have valid st_gen: update result mask */ 111760ce86c7SWei Liu v9stat_dotl.st_result_mask |= P9_STATS_GEN; 111860ce86c7SWei Liu break; 111960ce86c7SWei Liu case -EINTR: 112060ce86c7SWei Liu /* request cancelled, e.g. by Tflush */ 112160ce86c7SWei Liu goto out; 112260ce86c7SWei Liu default: 112360ce86c7SWei Liu /* failed to get st_gen: not fatal, ignore */ 112460ce86c7SWei Liu break; 112560ce86c7SWei Liu } 112660ce86c7SWei Liu } 112760ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "A", &v9stat_dotl); 112860ce86c7SWei Liu if (retval < 0) { 112960ce86c7SWei Liu goto out; 113060ce86c7SWei Liu } 113160ce86c7SWei Liu retval += offset; 113260ce86c7SWei Liu trace_v9fs_getattr_return(pdu->tag, pdu->id, v9stat_dotl.st_result_mask, 113360ce86c7SWei Liu v9stat_dotl.st_mode, v9stat_dotl.st_uid, 113460ce86c7SWei Liu v9stat_dotl.st_gid); 113560ce86c7SWei Liu out: 113660ce86c7SWei Liu put_fid(pdu, fidp); 113760ce86c7SWei Liu out_nofid: 113860ce86c7SWei Liu pdu_complete(pdu, retval); 113960ce86c7SWei Liu } 114060ce86c7SWei Liu 114160ce86c7SWei Liu /* Attribute flags */ 114260ce86c7SWei Liu #define P9_ATTR_MODE (1 << 0) 114360ce86c7SWei Liu #define P9_ATTR_UID (1 << 1) 114460ce86c7SWei Liu #define P9_ATTR_GID (1 << 2) 114560ce86c7SWei Liu #define P9_ATTR_SIZE (1 << 3) 114660ce86c7SWei Liu #define P9_ATTR_ATIME (1 << 4) 114760ce86c7SWei Liu #define P9_ATTR_MTIME (1 << 5) 114860ce86c7SWei Liu #define P9_ATTR_CTIME (1 << 6) 114960ce86c7SWei Liu #define P9_ATTR_ATIME_SET (1 << 7) 115060ce86c7SWei Liu #define P9_ATTR_MTIME_SET (1 << 8) 115160ce86c7SWei Liu 115260ce86c7SWei Liu #define P9_ATTR_MASK 127 115360ce86c7SWei Liu 115460ce86c7SWei Liu static void v9fs_setattr(void *opaque) 115560ce86c7SWei Liu { 115660ce86c7SWei Liu int err = 0; 115760ce86c7SWei Liu int32_t fid; 115860ce86c7SWei Liu V9fsFidState *fidp; 115960ce86c7SWei Liu size_t offset = 7; 116060ce86c7SWei Liu V9fsIattr v9iattr; 116160ce86c7SWei Liu V9fsPDU *pdu = opaque; 116260ce86c7SWei Liu 116360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); 116460ce86c7SWei Liu if (err < 0) { 116560ce86c7SWei Liu goto out_nofid; 116660ce86c7SWei Liu } 116760ce86c7SWei Liu 116860ce86c7SWei Liu fidp = get_fid(pdu, fid); 116960ce86c7SWei Liu if (fidp == NULL) { 117060ce86c7SWei Liu err = -EINVAL; 117160ce86c7SWei Liu goto out_nofid; 117260ce86c7SWei Liu } 117360ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MODE) { 117460ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, v9iattr.mode); 117560ce86c7SWei Liu if (err < 0) { 117660ce86c7SWei Liu goto out; 117760ce86c7SWei Liu } 117860ce86c7SWei Liu } 117960ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_ATIME | P9_ATTR_MTIME)) { 118060ce86c7SWei Liu struct timespec times[2]; 118160ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME) { 118260ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_ATIME_SET) { 118360ce86c7SWei Liu times[0].tv_sec = v9iattr.atime_sec; 118460ce86c7SWei Liu times[0].tv_nsec = v9iattr.atime_nsec; 118560ce86c7SWei Liu } else { 118660ce86c7SWei Liu times[0].tv_nsec = UTIME_NOW; 118760ce86c7SWei Liu } 118860ce86c7SWei Liu } else { 118960ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 119060ce86c7SWei Liu } 119160ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME) { 119260ce86c7SWei Liu if (v9iattr.valid & P9_ATTR_MTIME_SET) { 119360ce86c7SWei Liu times[1].tv_sec = v9iattr.mtime_sec; 119460ce86c7SWei Liu times[1].tv_nsec = v9iattr.mtime_nsec; 119560ce86c7SWei Liu } else { 119660ce86c7SWei Liu times[1].tv_nsec = UTIME_NOW; 119760ce86c7SWei Liu } 119860ce86c7SWei Liu } else { 119960ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 120060ce86c7SWei Liu } 120160ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 120260ce86c7SWei Liu if (err < 0) { 120360ce86c7SWei Liu goto out; 120460ce86c7SWei Liu } 120560ce86c7SWei Liu } 120660ce86c7SWei Liu /* 120760ce86c7SWei Liu * If the only valid entry in iattr is ctime we can call 120860ce86c7SWei Liu * chown(-1,-1) to update the ctime of the file 120960ce86c7SWei Liu */ 121060ce86c7SWei Liu if ((v9iattr.valid & (P9_ATTR_UID | P9_ATTR_GID)) || 121160ce86c7SWei Liu ((v9iattr.valid & P9_ATTR_CTIME) 121260ce86c7SWei Liu && !((v9iattr.valid & P9_ATTR_MASK) & ~P9_ATTR_CTIME))) { 121360ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_UID)) { 121460ce86c7SWei Liu v9iattr.uid = -1; 121560ce86c7SWei Liu } 121660ce86c7SWei Liu if (!(v9iattr.valid & P9_ATTR_GID)) { 121760ce86c7SWei Liu v9iattr.gid = -1; 121860ce86c7SWei Liu } 121960ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9iattr.uid, 122060ce86c7SWei Liu v9iattr.gid); 122160ce86c7SWei Liu if (err < 0) { 122260ce86c7SWei Liu goto out; 122360ce86c7SWei Liu } 122460ce86c7SWei Liu } 122560ce86c7SWei Liu if (v9iattr.valid & (P9_ATTR_SIZE)) { 122660ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9iattr.size); 122760ce86c7SWei Liu if (err < 0) { 122860ce86c7SWei Liu goto out; 122960ce86c7SWei Liu } 123060ce86c7SWei Liu } 123160ce86c7SWei Liu err = offset; 123260ce86c7SWei Liu out: 123360ce86c7SWei Liu put_fid(pdu, fidp); 123460ce86c7SWei Liu out_nofid: 123560ce86c7SWei Liu pdu_complete(pdu, err); 123660ce86c7SWei Liu } 123760ce86c7SWei Liu 123860ce86c7SWei Liu static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) 123960ce86c7SWei Liu { 124060ce86c7SWei Liu int i; 124160ce86c7SWei Liu ssize_t err; 124260ce86c7SWei Liu size_t offset = 7; 124360ce86c7SWei Liu 124460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "w", nwnames); 124560ce86c7SWei Liu if (err < 0) { 124660ce86c7SWei Liu return err; 124760ce86c7SWei Liu } 124860ce86c7SWei Liu offset += err; 124960ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 125060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qids[i]); 125160ce86c7SWei Liu if (err < 0) { 125260ce86c7SWei Liu return err; 125360ce86c7SWei Liu } 125460ce86c7SWei Liu offset += err; 125560ce86c7SWei Liu } 125660ce86c7SWei Liu return offset; 125760ce86c7SWei Liu } 125860ce86c7SWei Liu 1259fff39a7aSGreg Kurz static bool name_is_illegal(const char *name) 1260fff39a7aSGreg Kurz { 1261fff39a7aSGreg Kurz return !*name || strchr(name, '/') != NULL; 1262fff39a7aSGreg Kurz } 1263fff39a7aSGreg Kurz 126460ce86c7SWei Liu static void v9fs_walk(void *opaque) 126560ce86c7SWei Liu { 126660ce86c7SWei Liu int name_idx; 126760ce86c7SWei Liu V9fsQID *qids = NULL; 126860ce86c7SWei Liu int i, err = 0; 126960ce86c7SWei Liu V9fsPath dpath, path; 127060ce86c7SWei Liu uint16_t nwnames; 127160ce86c7SWei Liu struct stat stbuf; 127260ce86c7SWei Liu size_t offset = 7; 127360ce86c7SWei Liu int32_t fid, newfid; 127460ce86c7SWei Liu V9fsString *wnames = NULL; 127560ce86c7SWei Liu V9fsFidState *fidp; 127660ce86c7SWei Liu V9fsFidState *newfidp = NULL; 127760ce86c7SWei Liu V9fsPDU *pdu = opaque; 127860ce86c7SWei Liu V9fsState *s = pdu->s; 127960ce86c7SWei Liu 128060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "ddw", &fid, &newfid, &nwnames); 128160ce86c7SWei Liu if (err < 0) { 128260ce86c7SWei Liu pdu_complete(pdu, err); 128360ce86c7SWei Liu return ; 128460ce86c7SWei Liu } 128560ce86c7SWei Liu offset += err; 128660ce86c7SWei Liu 128760ce86c7SWei Liu trace_v9fs_walk(pdu->tag, pdu->id, fid, newfid, nwnames); 128860ce86c7SWei Liu 128960ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 129060ce86c7SWei Liu wnames = g_malloc0(sizeof(wnames[0]) * nwnames); 129160ce86c7SWei Liu qids = g_malloc0(sizeof(qids[0]) * nwnames); 129260ce86c7SWei Liu for (i = 0; i < nwnames; i++) { 129360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "s", &wnames[i]); 129460ce86c7SWei Liu if (err < 0) { 129560ce86c7SWei Liu goto out_nofid; 129660ce86c7SWei Liu } 1297fff39a7aSGreg Kurz if (name_is_illegal(wnames[i].data)) { 1298fff39a7aSGreg Kurz err = -ENOENT; 1299fff39a7aSGreg Kurz goto out_nofid; 1300fff39a7aSGreg Kurz } 130160ce86c7SWei Liu offset += err; 130260ce86c7SWei Liu } 130360ce86c7SWei Liu } else if (nwnames > P9_MAXWELEM) { 130460ce86c7SWei Liu err = -EINVAL; 130560ce86c7SWei Liu goto out_nofid; 130660ce86c7SWei Liu } 130760ce86c7SWei Liu fidp = get_fid(pdu, fid); 130860ce86c7SWei Liu if (fidp == NULL) { 130960ce86c7SWei Liu err = -ENOENT; 131060ce86c7SWei Liu goto out_nofid; 131160ce86c7SWei Liu } 131260ce86c7SWei Liu v9fs_path_init(&dpath); 131360ce86c7SWei Liu v9fs_path_init(&path); 131460ce86c7SWei Liu /* 131560ce86c7SWei Liu * Both dpath and path initially poin to fidp. 131660ce86c7SWei Liu * Needed to handle request with nwnames == 0 131760ce86c7SWei Liu */ 131860ce86c7SWei Liu v9fs_path_copy(&dpath, &fidp->path); 131960ce86c7SWei Liu v9fs_path_copy(&path, &fidp->path); 132060ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 132160ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dpath, wnames[name_idx].data, &path); 132260ce86c7SWei Liu if (err < 0) { 132360ce86c7SWei Liu goto out; 132460ce86c7SWei Liu } 132560ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 132660ce86c7SWei Liu if (err < 0) { 132760ce86c7SWei Liu goto out; 132860ce86c7SWei Liu } 132960ce86c7SWei Liu stat_to_qid(&stbuf, &qids[name_idx]); 133060ce86c7SWei Liu v9fs_path_copy(&dpath, &path); 133160ce86c7SWei Liu } 133260ce86c7SWei Liu if (fid == newfid) { 133360ce86c7SWei Liu BUG_ON(fidp->fid_type != P9_FID_NONE); 133460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 133560ce86c7SWei Liu } else { 133660ce86c7SWei Liu newfidp = alloc_fid(s, newfid); 133760ce86c7SWei Liu if (newfidp == NULL) { 133860ce86c7SWei Liu err = -EINVAL; 133960ce86c7SWei Liu goto out; 134060ce86c7SWei Liu } 134160ce86c7SWei Liu newfidp->uid = fidp->uid; 134260ce86c7SWei Liu v9fs_path_copy(&newfidp->path, &path); 134360ce86c7SWei Liu } 134460ce86c7SWei Liu err = v9fs_walk_marshal(pdu, nwnames, qids); 134560ce86c7SWei Liu trace_v9fs_walk_return(pdu->tag, pdu->id, nwnames, qids); 134660ce86c7SWei Liu out: 134760ce86c7SWei Liu put_fid(pdu, fidp); 134860ce86c7SWei Liu if (newfidp) { 134960ce86c7SWei Liu put_fid(pdu, newfidp); 135060ce86c7SWei Liu } 135160ce86c7SWei Liu v9fs_path_free(&dpath); 135260ce86c7SWei Liu v9fs_path_free(&path); 135360ce86c7SWei Liu out_nofid: 135460ce86c7SWei Liu pdu_complete(pdu, err); 135560ce86c7SWei Liu if (nwnames && nwnames <= P9_MAXWELEM) { 135660ce86c7SWei Liu for (name_idx = 0; name_idx < nwnames; name_idx++) { 135760ce86c7SWei Liu v9fs_string_free(&wnames[name_idx]); 135860ce86c7SWei Liu } 135960ce86c7SWei Liu g_free(wnames); 136060ce86c7SWei Liu g_free(qids); 136160ce86c7SWei Liu } 136260ce86c7SWei Liu } 136360ce86c7SWei Liu 136460ce86c7SWei Liu static int32_t get_iounit(V9fsPDU *pdu, V9fsPath *path) 136560ce86c7SWei Liu { 136660ce86c7SWei Liu struct statfs stbuf; 136760ce86c7SWei Liu int32_t iounit = 0; 136860ce86c7SWei Liu V9fsState *s = pdu->s; 136960ce86c7SWei Liu 137060ce86c7SWei Liu /* 137160ce86c7SWei Liu * iounit should be multiples of f_bsize (host filesystem block size 137260ce86c7SWei Liu * and as well as less than (client msize - P9_IOHDRSZ)) 137360ce86c7SWei Liu */ 137460ce86c7SWei Liu if (!v9fs_co_statfs(pdu, path, &stbuf)) { 137560ce86c7SWei Liu iounit = stbuf.f_bsize; 137660ce86c7SWei Liu iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; 137760ce86c7SWei Liu } 137860ce86c7SWei Liu if (!iounit) { 137960ce86c7SWei Liu iounit = s->msize - P9_IOHDRSZ; 138060ce86c7SWei Liu } 138160ce86c7SWei Liu return iounit; 138260ce86c7SWei Liu } 138360ce86c7SWei Liu 138460ce86c7SWei Liu static void v9fs_open(void *opaque) 138560ce86c7SWei Liu { 138660ce86c7SWei Liu int flags; 138760ce86c7SWei Liu int32_t fid; 138860ce86c7SWei Liu int32_t mode; 138960ce86c7SWei Liu V9fsQID qid; 139060ce86c7SWei Liu int iounit = 0; 139160ce86c7SWei Liu ssize_t err = 0; 139260ce86c7SWei Liu size_t offset = 7; 139360ce86c7SWei Liu struct stat stbuf; 139460ce86c7SWei Liu V9fsFidState *fidp; 139560ce86c7SWei Liu V9fsPDU *pdu = opaque; 139660ce86c7SWei Liu V9fsState *s = pdu->s; 139760ce86c7SWei Liu 139860ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 139960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &mode); 140060ce86c7SWei Liu } else { 140160ce86c7SWei Liu uint8_t modebyte; 140260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "db", &fid, &modebyte); 140360ce86c7SWei Liu mode = modebyte; 140460ce86c7SWei Liu } 140560ce86c7SWei Liu if (err < 0) { 140660ce86c7SWei Liu goto out_nofid; 140760ce86c7SWei Liu } 140860ce86c7SWei Liu trace_v9fs_open(pdu->tag, pdu->id, fid, mode); 140960ce86c7SWei Liu 141060ce86c7SWei Liu fidp = get_fid(pdu, fid); 141160ce86c7SWei Liu if (fidp == NULL) { 141260ce86c7SWei Liu err = -ENOENT; 141360ce86c7SWei Liu goto out_nofid; 141460ce86c7SWei Liu } 141560ce86c7SWei Liu BUG_ON(fidp->fid_type != P9_FID_NONE); 141660ce86c7SWei Liu 141760ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 141860ce86c7SWei Liu if (err < 0) { 141960ce86c7SWei Liu goto out; 142060ce86c7SWei Liu } 142160ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 142260ce86c7SWei Liu if (S_ISDIR(stbuf.st_mode)) { 142360ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 142460ce86c7SWei Liu if (err < 0) { 142560ce86c7SWei Liu goto out; 142660ce86c7SWei Liu } 142760ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 142860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, 0); 142960ce86c7SWei Liu if (err < 0) { 143060ce86c7SWei Liu goto out; 143160ce86c7SWei Liu } 143260ce86c7SWei Liu err += offset; 143360ce86c7SWei Liu } else { 143460ce86c7SWei Liu if (s->proto_version == V9FS_PROTO_2000L) { 143560ce86c7SWei Liu flags = get_dotl_openflags(s, mode); 143660ce86c7SWei Liu } else { 143760ce86c7SWei Liu flags = omode_to_uflags(mode); 143860ce86c7SWei Liu } 143960ce86c7SWei Liu if (is_ro_export(&s->ctx)) { 144060ce86c7SWei Liu if (mode & O_WRONLY || mode & O_RDWR || 144160ce86c7SWei Liu mode & O_APPEND || mode & O_TRUNC) { 144260ce86c7SWei Liu err = -EROFS; 144360ce86c7SWei Liu goto out; 144460ce86c7SWei Liu } 144560ce86c7SWei Liu } 144660ce86c7SWei Liu err = v9fs_co_open(pdu, fidp, flags); 144760ce86c7SWei Liu if (err < 0) { 144860ce86c7SWei Liu goto out; 144960ce86c7SWei Liu } 145060ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 145160ce86c7SWei Liu fidp->open_flags = flags; 145260ce86c7SWei Liu if (flags & O_EXCL) { 145360ce86c7SWei Liu /* 145460ce86c7SWei Liu * We let the host file system do O_EXCL check 145560ce86c7SWei Liu * We should not reclaim such fd 145660ce86c7SWei Liu */ 145760ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 145860ce86c7SWei Liu } 145960ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 146060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 146160ce86c7SWei Liu if (err < 0) { 146260ce86c7SWei Liu goto out; 146360ce86c7SWei Liu } 146460ce86c7SWei Liu err += offset; 146560ce86c7SWei Liu } 146660ce86c7SWei Liu trace_v9fs_open_return(pdu->tag, pdu->id, 146760ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 146860ce86c7SWei Liu out: 146960ce86c7SWei Liu put_fid(pdu, fidp); 147060ce86c7SWei Liu out_nofid: 147160ce86c7SWei Liu pdu_complete(pdu, err); 147260ce86c7SWei Liu } 147360ce86c7SWei Liu 147460ce86c7SWei Liu static void v9fs_lcreate(void *opaque) 147560ce86c7SWei Liu { 147660ce86c7SWei Liu int32_t dfid, flags, mode; 147760ce86c7SWei Liu gid_t gid; 147860ce86c7SWei Liu ssize_t err = 0; 147960ce86c7SWei Liu ssize_t offset = 7; 148060ce86c7SWei Liu V9fsString name; 148160ce86c7SWei Liu V9fsFidState *fidp; 148260ce86c7SWei Liu struct stat stbuf; 148360ce86c7SWei Liu V9fsQID qid; 148460ce86c7SWei Liu int32_t iounit; 148560ce86c7SWei Liu V9fsPDU *pdu = opaque; 148660ce86c7SWei Liu 148760ce86c7SWei Liu v9fs_string_init(&name); 148860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsddd", &dfid, 148960ce86c7SWei Liu &name, &flags, &mode, &gid); 149060ce86c7SWei Liu if (err < 0) { 149160ce86c7SWei Liu goto out_nofid; 149260ce86c7SWei Liu } 149360ce86c7SWei Liu trace_v9fs_lcreate(pdu->tag, pdu->id, dfid, flags, mode, gid); 149460ce86c7SWei Liu 1495fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 1496fff39a7aSGreg Kurz err = -ENOENT; 1497fff39a7aSGreg Kurz goto out_nofid; 1498fff39a7aSGreg Kurz } 1499fff39a7aSGreg Kurz 1500*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 1501*805b5d98SGreg Kurz err = -EEXIST; 1502*805b5d98SGreg Kurz goto out_nofid; 1503*805b5d98SGreg Kurz } 1504*805b5d98SGreg Kurz 150560ce86c7SWei Liu fidp = get_fid(pdu, dfid); 150660ce86c7SWei Liu if (fidp == NULL) { 150760ce86c7SWei Liu err = -ENOENT; 150860ce86c7SWei Liu goto out_nofid; 150960ce86c7SWei Liu } 151060ce86c7SWei Liu 151160ce86c7SWei Liu flags = get_dotl_openflags(pdu->s, flags); 151260ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, gid, 151360ce86c7SWei Liu flags | O_CREAT, mode, &stbuf); 151460ce86c7SWei Liu if (err < 0) { 151560ce86c7SWei Liu goto out; 151660ce86c7SWei Liu } 151760ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 151860ce86c7SWei Liu fidp->open_flags = flags; 151960ce86c7SWei Liu if (flags & O_EXCL) { 152060ce86c7SWei Liu /* 152160ce86c7SWei Liu * We let the host file system do O_EXCL check 152260ce86c7SWei Liu * We should not reclaim such fd 152360ce86c7SWei Liu */ 152460ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 152560ce86c7SWei Liu } 152660ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 152760ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 152860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 152960ce86c7SWei Liu if (err < 0) { 153060ce86c7SWei Liu goto out; 153160ce86c7SWei Liu } 153260ce86c7SWei Liu err += offset; 153360ce86c7SWei Liu trace_v9fs_lcreate_return(pdu->tag, pdu->id, 153460ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 153560ce86c7SWei Liu out: 153660ce86c7SWei Liu put_fid(pdu, fidp); 153760ce86c7SWei Liu out_nofid: 153860ce86c7SWei Liu pdu_complete(pdu, err); 153960ce86c7SWei Liu v9fs_string_free(&name); 154060ce86c7SWei Liu } 154160ce86c7SWei Liu 154260ce86c7SWei Liu static void v9fs_fsync(void *opaque) 154360ce86c7SWei Liu { 154460ce86c7SWei Liu int err; 154560ce86c7SWei Liu int32_t fid; 154660ce86c7SWei Liu int datasync; 154760ce86c7SWei Liu size_t offset = 7; 154860ce86c7SWei Liu V9fsFidState *fidp; 154960ce86c7SWei Liu V9fsPDU *pdu = opaque; 155060ce86c7SWei Liu 155160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); 155260ce86c7SWei Liu if (err < 0) { 155360ce86c7SWei Liu goto out_nofid; 155460ce86c7SWei Liu } 155560ce86c7SWei Liu trace_v9fs_fsync(pdu->tag, pdu->id, fid, datasync); 155660ce86c7SWei Liu 155760ce86c7SWei Liu fidp = get_fid(pdu, fid); 155860ce86c7SWei Liu if (fidp == NULL) { 155960ce86c7SWei Liu err = -ENOENT; 156060ce86c7SWei Liu goto out_nofid; 156160ce86c7SWei Liu } 156260ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, datasync); 156360ce86c7SWei Liu if (!err) { 156460ce86c7SWei Liu err = offset; 156560ce86c7SWei Liu } 156660ce86c7SWei Liu put_fid(pdu, fidp); 156760ce86c7SWei Liu out_nofid: 156860ce86c7SWei Liu pdu_complete(pdu, err); 156960ce86c7SWei Liu } 157060ce86c7SWei Liu 157160ce86c7SWei Liu static void v9fs_clunk(void *opaque) 157260ce86c7SWei Liu { 157360ce86c7SWei Liu int err; 157460ce86c7SWei Liu int32_t fid; 157560ce86c7SWei Liu size_t offset = 7; 157660ce86c7SWei Liu V9fsFidState *fidp; 157760ce86c7SWei Liu V9fsPDU *pdu = opaque; 157860ce86c7SWei Liu V9fsState *s = pdu->s; 157960ce86c7SWei Liu 158060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 158160ce86c7SWei Liu if (err < 0) { 158260ce86c7SWei Liu goto out_nofid; 158360ce86c7SWei Liu } 158460ce86c7SWei Liu trace_v9fs_clunk(pdu->tag, pdu->id, fid); 158560ce86c7SWei Liu 158660ce86c7SWei Liu fidp = clunk_fid(s, fid); 158760ce86c7SWei Liu if (fidp == NULL) { 158860ce86c7SWei Liu err = -ENOENT; 158960ce86c7SWei Liu goto out_nofid; 159060ce86c7SWei Liu } 159160ce86c7SWei Liu /* 159260ce86c7SWei Liu * Bump the ref so that put_fid will 159360ce86c7SWei Liu * free the fid. 159460ce86c7SWei Liu */ 159560ce86c7SWei Liu fidp->ref++; 159660ce86c7SWei Liu err = put_fid(pdu, fidp); 159760ce86c7SWei Liu if (!err) { 159860ce86c7SWei Liu err = offset; 159960ce86c7SWei Liu } 160060ce86c7SWei Liu out_nofid: 160160ce86c7SWei Liu pdu_complete(pdu, err); 160260ce86c7SWei Liu } 160360ce86c7SWei Liu 160460ce86c7SWei Liu static int v9fs_xattr_read(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 160560ce86c7SWei Liu uint64_t off, uint32_t max_count) 160660ce86c7SWei Liu { 160760ce86c7SWei Liu ssize_t err; 160860ce86c7SWei Liu size_t offset = 7; 160960ce86c7SWei Liu int read_count; 161060ce86c7SWei Liu int64_t xattr_len; 161100588a0aSWei Liu V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); 161251b19ebeSPaolo Bonzini VirtQueueElement *elem = v->elems[pdu->idx]; 161360ce86c7SWei Liu 161460ce86c7SWei Liu xattr_len = fidp->fs.xattr.len; 161560ce86c7SWei Liu read_count = xattr_len - off; 161660ce86c7SWei Liu if (read_count > max_count) { 161760ce86c7SWei Liu read_count = max_count; 161860ce86c7SWei Liu } else if (read_count < 0) { 161960ce86c7SWei Liu /* 162060ce86c7SWei Liu * read beyond XATTR value 162160ce86c7SWei Liu */ 162260ce86c7SWei Liu read_count = 0; 162360ce86c7SWei Liu } 162460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", read_count); 162560ce86c7SWei Liu if (err < 0) { 162660ce86c7SWei Liu return err; 162760ce86c7SWei Liu } 162860ce86c7SWei Liu offset += err; 162900588a0aSWei Liu 163000588a0aSWei Liu err = v9fs_pack(elem->in_sg, elem->in_num, offset, 163160ce86c7SWei Liu ((char *)fidp->fs.xattr.value) + off, 163260ce86c7SWei Liu read_count); 163360ce86c7SWei Liu if (err < 0) { 163460ce86c7SWei Liu return err; 163560ce86c7SWei Liu } 163660ce86c7SWei Liu offset += err; 163760ce86c7SWei Liu return offset; 163860ce86c7SWei Liu } 163960ce86c7SWei Liu 164060ce86c7SWei Liu static int v9fs_do_readdir_with_stat(V9fsPDU *pdu, 164160ce86c7SWei Liu V9fsFidState *fidp, uint32_t max_count) 164260ce86c7SWei Liu { 164360ce86c7SWei Liu V9fsPath path; 164460ce86c7SWei Liu V9fsStat v9stat; 164560ce86c7SWei Liu int len, err = 0; 164660ce86c7SWei Liu int32_t count = 0; 164760ce86c7SWei Liu struct stat stbuf; 164860ce86c7SWei Liu off_t saved_dir_pos; 1649635324e8SGreg Kurz struct dirent *dent; 165060ce86c7SWei Liu 165160ce86c7SWei Liu /* save the directory position */ 165260ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 165360ce86c7SWei Liu if (saved_dir_pos < 0) { 165460ce86c7SWei Liu return saved_dir_pos; 165560ce86c7SWei Liu } 165660ce86c7SWei Liu 165760ce86c7SWei Liu while (1) { 165860ce86c7SWei Liu v9fs_path_init(&path); 16597cde47d4SGreg Kurz 16607cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 16617cde47d4SGreg Kurz 1662635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1663635324e8SGreg Kurz if (err || !dent) { 166460ce86c7SWei Liu break; 166560ce86c7SWei Liu } 166660ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, dent->d_name, &path); 166760ce86c7SWei Liu if (err < 0) { 16688762a46dSGreg Kurz break; 166960ce86c7SWei Liu } 167060ce86c7SWei Liu err = v9fs_co_lstat(pdu, &path, &stbuf); 167160ce86c7SWei Liu if (err < 0) { 16728762a46dSGreg Kurz break; 167360ce86c7SWei Liu } 167460ce86c7SWei Liu err = stat_to_v9stat(pdu, &path, &stbuf, &v9stat); 167560ce86c7SWei Liu if (err < 0) { 16768762a46dSGreg Kurz break; 167760ce86c7SWei Liu } 167860ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 167960ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "S", &v9stat); 16807cde47d4SGreg Kurz 16817cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 16827cde47d4SGreg Kurz 168360ce86c7SWei Liu if ((len != (v9stat.size + 2)) || ((count + len) > max_count)) { 168460ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 168560ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 168660ce86c7SWei Liu v9fs_stat_free(&v9stat); 168760ce86c7SWei Liu v9fs_path_free(&path); 168860ce86c7SWei Liu return count; 168960ce86c7SWei Liu } 169060ce86c7SWei Liu count += len; 169160ce86c7SWei Liu v9fs_stat_free(&v9stat); 169260ce86c7SWei Liu v9fs_path_free(&path); 169360ce86c7SWei Liu saved_dir_pos = dent->d_off; 169460ce86c7SWei Liu } 16958762a46dSGreg Kurz 16967cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 16977cde47d4SGreg Kurz 169860ce86c7SWei Liu v9fs_path_free(&path); 169960ce86c7SWei Liu if (err < 0) { 170060ce86c7SWei Liu return err; 170160ce86c7SWei Liu } 170260ce86c7SWei Liu return count; 170360ce86c7SWei Liu } 170460ce86c7SWei Liu 170560ce86c7SWei Liu /* 170660ce86c7SWei Liu * Create a QEMUIOVector for a sub-region of PDU iovecs 170760ce86c7SWei Liu * 170860ce86c7SWei Liu * @qiov: uninitialized QEMUIOVector 170960ce86c7SWei Liu * @skip: number of bytes to skip from beginning of PDU 171060ce86c7SWei Liu * @size: number of bytes to include 171160ce86c7SWei Liu * @is_write: true - write, false - read 171260ce86c7SWei Liu * 171360ce86c7SWei Liu * The resulting QEMUIOVector has heap-allocated iovecs and must be cleaned up 171460ce86c7SWei Liu * with qemu_iovec_destroy(). 171560ce86c7SWei Liu */ 171660ce86c7SWei Liu static void v9fs_init_qiov_from_pdu(QEMUIOVector *qiov, V9fsPDU *pdu, 171760ce86c7SWei Liu size_t skip, size_t size, 171860ce86c7SWei Liu bool is_write) 171960ce86c7SWei Liu { 172060ce86c7SWei Liu QEMUIOVector elem; 172160ce86c7SWei Liu struct iovec *iov; 172260ce86c7SWei Liu unsigned int niov; 172360ce86c7SWei Liu 172460ce86c7SWei Liu virtio_init_iov_from_pdu(pdu, &iov, &niov, is_write); 172560ce86c7SWei Liu 172660ce86c7SWei Liu qemu_iovec_init_external(&elem, iov, niov); 172760ce86c7SWei Liu qemu_iovec_init(qiov, niov); 172860ce86c7SWei Liu qemu_iovec_concat(qiov, &elem, skip, size); 172960ce86c7SWei Liu } 173060ce86c7SWei Liu 173160ce86c7SWei Liu static void v9fs_read(void *opaque) 173260ce86c7SWei Liu { 173360ce86c7SWei Liu int32_t fid; 173460ce86c7SWei Liu uint64_t off; 173560ce86c7SWei Liu ssize_t err = 0; 173660ce86c7SWei Liu int32_t count = 0; 173760ce86c7SWei Liu size_t offset = 7; 173860ce86c7SWei Liu uint32_t max_count; 173960ce86c7SWei Liu V9fsFidState *fidp; 174060ce86c7SWei Liu V9fsPDU *pdu = opaque; 174160ce86c7SWei Liu V9fsState *s = pdu->s; 174260ce86c7SWei Liu 174360ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); 174460ce86c7SWei Liu if (err < 0) { 174560ce86c7SWei Liu goto out_nofid; 174660ce86c7SWei Liu } 174760ce86c7SWei Liu trace_v9fs_read(pdu->tag, pdu->id, fid, off, max_count); 174860ce86c7SWei Liu 174960ce86c7SWei Liu fidp = get_fid(pdu, fid); 175060ce86c7SWei Liu if (fidp == NULL) { 175160ce86c7SWei Liu err = -EINVAL; 175260ce86c7SWei Liu goto out_nofid; 175360ce86c7SWei Liu } 175460ce86c7SWei Liu if (fidp->fid_type == P9_FID_DIR) { 175560ce86c7SWei Liu 175660ce86c7SWei Liu if (off == 0) { 175760ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 175860ce86c7SWei Liu } 175960ce86c7SWei Liu count = v9fs_do_readdir_with_stat(pdu, fidp, max_count); 176060ce86c7SWei Liu if (count < 0) { 176160ce86c7SWei Liu err = count; 176260ce86c7SWei Liu goto out; 176360ce86c7SWei Liu } 176460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 176560ce86c7SWei Liu if (err < 0) { 176660ce86c7SWei Liu goto out; 176760ce86c7SWei Liu } 176860ce86c7SWei Liu err += offset + count; 176960ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_FILE) { 177060ce86c7SWei Liu QEMUIOVector qiov_full; 177160ce86c7SWei Liu QEMUIOVector qiov; 177260ce86c7SWei Liu int32_t len; 177360ce86c7SWei Liu 177460ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset + 4, max_count, false); 177560ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 177660ce86c7SWei Liu do { 177760ce86c7SWei Liu qemu_iovec_reset(&qiov); 177860ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, count, qiov_full.size - count); 177960ce86c7SWei Liu if (0) { 178060ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 178160ce86c7SWei Liu } 178260ce86c7SWei Liu /* Loop in case of EINTR */ 178360ce86c7SWei Liu do { 178460ce86c7SWei Liu len = v9fs_co_preadv(pdu, fidp, qiov.iov, qiov.niov, off); 178560ce86c7SWei Liu if (len >= 0) { 178660ce86c7SWei Liu off += len; 178760ce86c7SWei Liu count += len; 178860ce86c7SWei Liu } 178960ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 179060ce86c7SWei Liu if (len < 0) { 179160ce86c7SWei Liu /* IO error return the error */ 179260ce86c7SWei Liu err = len; 179360ce86c7SWei Liu goto out; 179460ce86c7SWei Liu } 179560ce86c7SWei Liu } while (count < max_count && len > 0); 179660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", count); 179760ce86c7SWei Liu if (err < 0) { 179860ce86c7SWei Liu goto out; 179960ce86c7SWei Liu } 180060ce86c7SWei Liu err += offset + count; 180160ce86c7SWei Liu qemu_iovec_destroy(&qiov); 180260ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 180360ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 180460ce86c7SWei Liu err = v9fs_xattr_read(s, pdu, fidp, off, max_count); 180560ce86c7SWei Liu } else { 180660ce86c7SWei Liu err = -EINVAL; 180760ce86c7SWei Liu } 180860ce86c7SWei Liu trace_v9fs_read_return(pdu->tag, pdu->id, count, err); 180960ce86c7SWei Liu out: 181060ce86c7SWei Liu put_fid(pdu, fidp); 181160ce86c7SWei Liu out_nofid: 181260ce86c7SWei Liu pdu_complete(pdu, err); 181360ce86c7SWei Liu } 181460ce86c7SWei Liu 181560ce86c7SWei Liu static size_t v9fs_readdir_data_size(V9fsString *name) 181660ce86c7SWei Liu { 181760ce86c7SWei Liu /* 181860ce86c7SWei Liu * Size of each dirent on the wire: size of qid (13) + size of offset (8) 181960ce86c7SWei Liu * size of type (1) + size of name.size (2) + strlen(name.data) 182060ce86c7SWei Liu */ 182160ce86c7SWei Liu return 24 + v9fs_string_size(name); 182260ce86c7SWei Liu } 182360ce86c7SWei Liu 182460ce86c7SWei Liu static int v9fs_do_readdir(V9fsPDU *pdu, 182560ce86c7SWei Liu V9fsFidState *fidp, int32_t max_count) 182660ce86c7SWei Liu { 182760ce86c7SWei Liu size_t size; 182860ce86c7SWei Liu V9fsQID qid; 182960ce86c7SWei Liu V9fsString name; 183060ce86c7SWei Liu int len, err = 0; 183160ce86c7SWei Liu int32_t count = 0; 183260ce86c7SWei Liu off_t saved_dir_pos; 1833635324e8SGreg Kurz struct dirent *dent; 183460ce86c7SWei Liu 183560ce86c7SWei Liu /* save the directory position */ 183660ce86c7SWei Liu saved_dir_pos = v9fs_co_telldir(pdu, fidp); 183760ce86c7SWei Liu if (saved_dir_pos < 0) { 183860ce86c7SWei Liu return saved_dir_pos; 183960ce86c7SWei Liu } 184060ce86c7SWei Liu 184160ce86c7SWei Liu while (1) { 18427cde47d4SGreg Kurz v9fs_readdir_lock(&fidp->fs.dir); 18437cde47d4SGreg Kurz 1844635324e8SGreg Kurz err = v9fs_co_readdir(pdu, fidp, &dent); 1845635324e8SGreg Kurz if (err || !dent) { 184660ce86c7SWei Liu break; 184760ce86c7SWei Liu } 184860ce86c7SWei Liu v9fs_string_init(&name); 184960ce86c7SWei Liu v9fs_string_sprintf(&name, "%s", dent->d_name); 185060ce86c7SWei Liu if ((count + v9fs_readdir_data_size(&name)) > max_count) { 18517cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18527cde47d4SGreg Kurz 185360ce86c7SWei Liu /* Ran out of buffer. Set dir back to old position and return */ 185460ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 185560ce86c7SWei Liu v9fs_string_free(&name); 185660ce86c7SWei Liu return count; 185760ce86c7SWei Liu } 185860ce86c7SWei Liu /* 185960ce86c7SWei Liu * Fill up just the path field of qid because the client uses 186060ce86c7SWei Liu * only that. To fill the entire qid structure we will have 186160ce86c7SWei Liu * to stat each dirent found, which is expensive 186260ce86c7SWei Liu */ 186360ce86c7SWei Liu size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); 186460ce86c7SWei Liu memcpy(&qid.path, &dent->d_ino, size); 186560ce86c7SWei Liu /* Fill the other fields with dummy values */ 186660ce86c7SWei Liu qid.type = 0; 186760ce86c7SWei Liu qid.version = 0; 186860ce86c7SWei Liu 186960ce86c7SWei Liu /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ 187060ce86c7SWei Liu len = pdu_marshal(pdu, 11 + count, "Qqbs", 187160ce86c7SWei Liu &qid, dent->d_off, 187260ce86c7SWei Liu dent->d_type, &name); 18737cde47d4SGreg Kurz 18747cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18757cde47d4SGreg Kurz 187660ce86c7SWei Liu if (len < 0) { 187760ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, saved_dir_pos); 187860ce86c7SWei Liu v9fs_string_free(&name); 187960ce86c7SWei Liu return len; 188060ce86c7SWei Liu } 188160ce86c7SWei Liu count += len; 188260ce86c7SWei Liu v9fs_string_free(&name); 188360ce86c7SWei Liu saved_dir_pos = dent->d_off; 188460ce86c7SWei Liu } 18857cde47d4SGreg Kurz 18867cde47d4SGreg Kurz v9fs_readdir_unlock(&fidp->fs.dir); 18877cde47d4SGreg Kurz 188860ce86c7SWei Liu if (err < 0) { 188960ce86c7SWei Liu return err; 189060ce86c7SWei Liu } 189160ce86c7SWei Liu return count; 189260ce86c7SWei Liu } 189360ce86c7SWei Liu 189460ce86c7SWei Liu static void v9fs_readdir(void *opaque) 189560ce86c7SWei Liu { 189660ce86c7SWei Liu int32_t fid; 189760ce86c7SWei Liu V9fsFidState *fidp; 189860ce86c7SWei Liu ssize_t retval = 0; 189960ce86c7SWei Liu size_t offset = 7; 190060ce86c7SWei Liu uint64_t initial_offset; 190160ce86c7SWei Liu int32_t count; 190260ce86c7SWei Liu uint32_t max_count; 190360ce86c7SWei Liu V9fsPDU *pdu = opaque; 190460ce86c7SWei Liu 190560ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "dqd", &fid, 190660ce86c7SWei Liu &initial_offset, &max_count); 190760ce86c7SWei Liu if (retval < 0) { 190860ce86c7SWei Liu goto out_nofid; 190960ce86c7SWei Liu } 191060ce86c7SWei Liu trace_v9fs_readdir(pdu->tag, pdu->id, fid, initial_offset, max_count); 191160ce86c7SWei Liu 191260ce86c7SWei Liu fidp = get_fid(pdu, fid); 191360ce86c7SWei Liu if (fidp == NULL) { 191460ce86c7SWei Liu retval = -EINVAL; 191560ce86c7SWei Liu goto out_nofid; 191660ce86c7SWei Liu } 1917f314ea4eSGreg Kurz if (!fidp->fs.dir.stream) { 191860ce86c7SWei Liu retval = -EINVAL; 191960ce86c7SWei Liu goto out; 192060ce86c7SWei Liu } 192160ce86c7SWei Liu if (initial_offset == 0) { 192260ce86c7SWei Liu v9fs_co_rewinddir(pdu, fidp); 192360ce86c7SWei Liu } else { 192460ce86c7SWei Liu v9fs_co_seekdir(pdu, fidp, initial_offset); 192560ce86c7SWei Liu } 192660ce86c7SWei Liu count = v9fs_do_readdir(pdu, fidp, max_count); 192760ce86c7SWei Liu if (count < 0) { 192860ce86c7SWei Liu retval = count; 192960ce86c7SWei Liu goto out; 193060ce86c7SWei Liu } 193160ce86c7SWei Liu retval = pdu_marshal(pdu, offset, "d", count); 193260ce86c7SWei Liu if (retval < 0) { 193360ce86c7SWei Liu goto out; 193460ce86c7SWei Liu } 193560ce86c7SWei Liu retval += count + offset; 193660ce86c7SWei Liu trace_v9fs_readdir_return(pdu->tag, pdu->id, count, retval); 193760ce86c7SWei Liu out: 193860ce86c7SWei Liu put_fid(pdu, fidp); 193960ce86c7SWei Liu out_nofid: 194060ce86c7SWei Liu pdu_complete(pdu, retval); 194160ce86c7SWei Liu } 194260ce86c7SWei Liu 194360ce86c7SWei Liu static int v9fs_xattr_write(V9fsState *s, V9fsPDU *pdu, V9fsFidState *fidp, 194460ce86c7SWei Liu uint64_t off, uint32_t count, 194560ce86c7SWei Liu struct iovec *sg, int cnt) 194660ce86c7SWei Liu { 194760ce86c7SWei Liu int i, to_copy; 194860ce86c7SWei Liu ssize_t err = 0; 194960ce86c7SWei Liu int write_count; 195060ce86c7SWei Liu int64_t xattr_len; 195160ce86c7SWei Liu size_t offset = 7; 195260ce86c7SWei Liu 195360ce86c7SWei Liu 195460ce86c7SWei Liu xattr_len = fidp->fs.xattr.len; 195560ce86c7SWei Liu write_count = xattr_len - off; 195660ce86c7SWei Liu if (write_count > count) { 195760ce86c7SWei Liu write_count = count; 195860ce86c7SWei Liu } else if (write_count < 0) { 195960ce86c7SWei Liu /* 196060ce86c7SWei Liu * write beyond XATTR value len specified in 196160ce86c7SWei Liu * xattrcreate 196260ce86c7SWei Liu */ 196360ce86c7SWei Liu err = -ENOSPC; 196460ce86c7SWei Liu goto out; 196560ce86c7SWei Liu } 196660ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", write_count); 196760ce86c7SWei Liu if (err < 0) { 196860ce86c7SWei Liu return err; 196960ce86c7SWei Liu } 197060ce86c7SWei Liu err += offset; 197160ce86c7SWei Liu fidp->fs.xattr.copied_len += write_count; 197260ce86c7SWei Liu /* 197360ce86c7SWei Liu * Now copy the content from sg list 197460ce86c7SWei Liu */ 197560ce86c7SWei Liu for (i = 0; i < cnt; i++) { 197660ce86c7SWei Liu if (write_count > sg[i].iov_len) { 197760ce86c7SWei Liu to_copy = sg[i].iov_len; 197860ce86c7SWei Liu } else { 197960ce86c7SWei Liu to_copy = write_count; 198060ce86c7SWei Liu } 198160ce86c7SWei Liu memcpy((char *)fidp->fs.xattr.value + off, sg[i].iov_base, to_copy); 198260ce86c7SWei Liu /* updating vs->off since we are not using below */ 198360ce86c7SWei Liu off += to_copy; 198460ce86c7SWei Liu write_count -= to_copy; 198560ce86c7SWei Liu } 198660ce86c7SWei Liu out: 198760ce86c7SWei Liu return err; 198860ce86c7SWei Liu } 198960ce86c7SWei Liu 199060ce86c7SWei Liu static void v9fs_write(void *opaque) 199160ce86c7SWei Liu { 199260ce86c7SWei Liu ssize_t err; 199360ce86c7SWei Liu int32_t fid; 199460ce86c7SWei Liu uint64_t off; 199560ce86c7SWei Liu uint32_t count; 199660ce86c7SWei Liu int32_t len = 0; 199760ce86c7SWei Liu int32_t total = 0; 199860ce86c7SWei Liu size_t offset = 7; 199960ce86c7SWei Liu V9fsFidState *fidp; 200060ce86c7SWei Liu V9fsPDU *pdu = opaque; 200160ce86c7SWei Liu V9fsState *s = pdu->s; 200260ce86c7SWei Liu QEMUIOVector qiov_full; 200360ce86c7SWei Liu QEMUIOVector qiov; 200460ce86c7SWei Liu 200560ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &count); 200660ce86c7SWei Liu if (err < 0) { 200760ce86c7SWei Liu pdu_complete(pdu, err); 200860ce86c7SWei Liu return; 200960ce86c7SWei Liu } 201060ce86c7SWei Liu offset += err; 201160ce86c7SWei Liu v9fs_init_qiov_from_pdu(&qiov_full, pdu, offset, count, true); 201260ce86c7SWei Liu trace_v9fs_write(pdu->tag, pdu->id, fid, off, count, qiov_full.niov); 201360ce86c7SWei Liu 201460ce86c7SWei Liu fidp = get_fid(pdu, fid); 201560ce86c7SWei Liu if (fidp == NULL) { 201660ce86c7SWei Liu err = -EINVAL; 201760ce86c7SWei Liu goto out_nofid; 201860ce86c7SWei Liu } 201960ce86c7SWei Liu if (fidp->fid_type == P9_FID_FILE) { 202060ce86c7SWei Liu if (fidp->fs.fd == -1) { 202160ce86c7SWei Liu err = -EINVAL; 202260ce86c7SWei Liu goto out; 202360ce86c7SWei Liu } 202460ce86c7SWei Liu } else if (fidp->fid_type == P9_FID_XATTR) { 202560ce86c7SWei Liu /* 202660ce86c7SWei Liu * setxattr operation 202760ce86c7SWei Liu */ 202860ce86c7SWei Liu err = v9fs_xattr_write(s, pdu, fidp, off, count, 202960ce86c7SWei Liu qiov_full.iov, qiov_full.niov); 203060ce86c7SWei Liu goto out; 203160ce86c7SWei Liu } else { 203260ce86c7SWei Liu err = -EINVAL; 203360ce86c7SWei Liu goto out; 203460ce86c7SWei Liu } 203560ce86c7SWei Liu qemu_iovec_init(&qiov, qiov_full.niov); 203660ce86c7SWei Liu do { 203760ce86c7SWei Liu qemu_iovec_reset(&qiov); 203860ce86c7SWei Liu qemu_iovec_concat(&qiov, &qiov_full, total, qiov_full.size - total); 203960ce86c7SWei Liu if (0) { 204060ce86c7SWei Liu print_sg(qiov.iov, qiov.niov); 204160ce86c7SWei Liu } 204260ce86c7SWei Liu /* Loop in case of EINTR */ 204360ce86c7SWei Liu do { 204460ce86c7SWei Liu len = v9fs_co_pwritev(pdu, fidp, qiov.iov, qiov.niov, off); 204560ce86c7SWei Liu if (len >= 0) { 204660ce86c7SWei Liu off += len; 204760ce86c7SWei Liu total += len; 204860ce86c7SWei Liu } 204960ce86c7SWei Liu } while (len == -EINTR && !pdu->cancelled); 205060ce86c7SWei Liu if (len < 0) { 205160ce86c7SWei Liu /* IO error return the error */ 205260ce86c7SWei Liu err = len; 205360ce86c7SWei Liu goto out_qiov; 205460ce86c7SWei Liu } 205560ce86c7SWei Liu } while (total < count && len > 0); 205660ce86c7SWei Liu 205760ce86c7SWei Liu offset = 7; 205860ce86c7SWei Liu err = pdu_marshal(pdu, offset, "d", total); 205960ce86c7SWei Liu if (err < 0) { 206060ce86c7SWei Liu goto out; 206160ce86c7SWei Liu } 206260ce86c7SWei Liu err += offset; 206360ce86c7SWei Liu trace_v9fs_write_return(pdu->tag, pdu->id, total, err); 206460ce86c7SWei Liu out_qiov: 206560ce86c7SWei Liu qemu_iovec_destroy(&qiov); 206660ce86c7SWei Liu out: 206760ce86c7SWei Liu put_fid(pdu, fidp); 206860ce86c7SWei Liu out_nofid: 206960ce86c7SWei Liu qemu_iovec_destroy(&qiov_full); 207060ce86c7SWei Liu pdu_complete(pdu, err); 207160ce86c7SWei Liu } 207260ce86c7SWei Liu 207360ce86c7SWei Liu static void v9fs_create(void *opaque) 207460ce86c7SWei Liu { 207560ce86c7SWei Liu int32_t fid; 207660ce86c7SWei Liu int err = 0; 207760ce86c7SWei Liu size_t offset = 7; 207860ce86c7SWei Liu V9fsFidState *fidp; 207960ce86c7SWei Liu V9fsQID qid; 208060ce86c7SWei Liu int32_t perm; 208160ce86c7SWei Liu int8_t mode; 208260ce86c7SWei Liu V9fsPath path; 208360ce86c7SWei Liu struct stat stbuf; 208460ce86c7SWei Liu V9fsString name; 208560ce86c7SWei Liu V9fsString extension; 208660ce86c7SWei Liu int iounit; 208760ce86c7SWei Liu V9fsPDU *pdu = opaque; 208860ce86c7SWei Liu 208960ce86c7SWei Liu v9fs_path_init(&path); 209060ce86c7SWei Liu v9fs_string_init(&name); 209160ce86c7SWei Liu v9fs_string_init(&extension); 209260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, 209360ce86c7SWei Liu &perm, &mode, &extension); 209460ce86c7SWei Liu if (err < 0) { 209560ce86c7SWei Liu goto out_nofid; 209660ce86c7SWei Liu } 209760ce86c7SWei Liu trace_v9fs_create(pdu->tag, pdu->id, fid, name.data, perm, mode); 209860ce86c7SWei Liu 2099fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2100fff39a7aSGreg Kurz err = -ENOENT; 2101fff39a7aSGreg Kurz goto out_nofid; 2102fff39a7aSGreg Kurz } 2103fff39a7aSGreg Kurz 2104*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2105*805b5d98SGreg Kurz err = -EEXIST; 2106*805b5d98SGreg Kurz goto out_nofid; 2107*805b5d98SGreg Kurz } 2108*805b5d98SGreg Kurz 210960ce86c7SWei Liu fidp = get_fid(pdu, fid); 211060ce86c7SWei Liu if (fidp == NULL) { 211160ce86c7SWei Liu err = -EINVAL; 211260ce86c7SWei Liu goto out_nofid; 211360ce86c7SWei Liu } 211460ce86c7SWei Liu if (perm & P9_STAT_MODE_DIR) { 211560ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, perm & 0777, 211660ce86c7SWei Liu fidp->uid, -1, &stbuf); 211760ce86c7SWei Liu if (err < 0) { 211860ce86c7SWei Liu goto out; 211960ce86c7SWei Liu } 212060ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 212160ce86c7SWei Liu if (err < 0) { 212260ce86c7SWei Liu goto out; 212360ce86c7SWei Liu } 212460ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 212560ce86c7SWei Liu err = v9fs_co_opendir(pdu, fidp); 212660ce86c7SWei Liu if (err < 0) { 212760ce86c7SWei Liu goto out; 212860ce86c7SWei Liu } 212960ce86c7SWei Liu fidp->fid_type = P9_FID_DIR; 213060ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SYMLINK) { 213160ce86c7SWei Liu err = v9fs_co_symlink(pdu, fidp, &name, 213260ce86c7SWei Liu extension.data, -1 , &stbuf); 213360ce86c7SWei Liu if (err < 0) { 213460ce86c7SWei Liu goto out; 213560ce86c7SWei Liu } 213660ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 213760ce86c7SWei Liu if (err < 0) { 213860ce86c7SWei Liu goto out; 213960ce86c7SWei Liu } 214060ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 214160ce86c7SWei Liu } else if (perm & P9_STAT_MODE_LINK) { 214260ce86c7SWei Liu int32_t ofid = atoi(extension.data); 214360ce86c7SWei Liu V9fsFidState *ofidp = get_fid(pdu, ofid); 214460ce86c7SWei Liu if (ofidp == NULL) { 214560ce86c7SWei Liu err = -EINVAL; 214660ce86c7SWei Liu goto out; 214760ce86c7SWei Liu } 214860ce86c7SWei Liu err = v9fs_co_link(pdu, ofidp, fidp, &name); 214960ce86c7SWei Liu put_fid(pdu, ofidp); 215060ce86c7SWei Liu if (err < 0) { 215160ce86c7SWei Liu goto out; 215260ce86c7SWei Liu } 215360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 215460ce86c7SWei Liu if (err < 0) { 215560ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 215660ce86c7SWei Liu goto out; 215760ce86c7SWei Liu } 215860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 215960ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 216060ce86c7SWei Liu if (err < 0) { 216160ce86c7SWei Liu fidp->fid_type = P9_FID_NONE; 216260ce86c7SWei Liu goto out; 216360ce86c7SWei Liu } 216460ce86c7SWei Liu } else if (perm & P9_STAT_MODE_DEVICE) { 216560ce86c7SWei Liu char ctype; 216660ce86c7SWei Liu uint32_t major, minor; 216760ce86c7SWei Liu mode_t nmode = 0; 216860ce86c7SWei Liu 216960ce86c7SWei Liu if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { 217060ce86c7SWei Liu err = -errno; 217160ce86c7SWei Liu goto out; 217260ce86c7SWei Liu } 217360ce86c7SWei Liu 217460ce86c7SWei Liu switch (ctype) { 217560ce86c7SWei Liu case 'c': 217660ce86c7SWei Liu nmode = S_IFCHR; 217760ce86c7SWei Liu break; 217860ce86c7SWei Liu case 'b': 217960ce86c7SWei Liu nmode = S_IFBLK; 218060ce86c7SWei Liu break; 218160ce86c7SWei Liu default: 218260ce86c7SWei Liu err = -EIO; 218360ce86c7SWei Liu goto out; 218460ce86c7SWei Liu } 218560ce86c7SWei Liu 218660ce86c7SWei Liu nmode |= perm & 0777; 218760ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 218860ce86c7SWei Liu makedev(major, minor), nmode, &stbuf); 218960ce86c7SWei Liu if (err < 0) { 219060ce86c7SWei Liu goto out; 219160ce86c7SWei Liu } 219260ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 219360ce86c7SWei Liu if (err < 0) { 219460ce86c7SWei Liu goto out; 219560ce86c7SWei Liu } 219660ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 219760ce86c7SWei Liu } else if (perm & P9_STAT_MODE_NAMED_PIPE) { 219860ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 219960ce86c7SWei Liu 0, S_IFIFO | (perm & 0777), &stbuf); 220060ce86c7SWei Liu if (err < 0) { 220160ce86c7SWei Liu goto out; 220260ce86c7SWei Liu } 220360ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 220460ce86c7SWei Liu if (err < 0) { 220560ce86c7SWei Liu goto out; 220660ce86c7SWei Liu } 220760ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 220860ce86c7SWei Liu } else if (perm & P9_STAT_MODE_SOCKET) { 220960ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, -1, 221060ce86c7SWei Liu 0, S_IFSOCK | (perm & 0777), &stbuf); 221160ce86c7SWei Liu if (err < 0) { 221260ce86c7SWei Liu goto out; 221360ce86c7SWei Liu } 221460ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &fidp->path, name.data, &path); 221560ce86c7SWei Liu if (err < 0) { 221660ce86c7SWei Liu goto out; 221760ce86c7SWei Liu } 221860ce86c7SWei Liu v9fs_path_copy(&fidp->path, &path); 221960ce86c7SWei Liu } else { 222060ce86c7SWei Liu err = v9fs_co_open2(pdu, fidp, &name, -1, 222160ce86c7SWei Liu omode_to_uflags(mode)|O_CREAT, perm, &stbuf); 222260ce86c7SWei Liu if (err < 0) { 222360ce86c7SWei Liu goto out; 222460ce86c7SWei Liu } 222560ce86c7SWei Liu fidp->fid_type = P9_FID_FILE; 222660ce86c7SWei Liu fidp->open_flags = omode_to_uflags(mode); 222760ce86c7SWei Liu if (fidp->open_flags & O_EXCL) { 222860ce86c7SWei Liu /* 222960ce86c7SWei Liu * We let the host file system do O_EXCL check 223060ce86c7SWei Liu * We should not reclaim such fd 223160ce86c7SWei Liu */ 223260ce86c7SWei Liu fidp->flags |= FID_NON_RECLAIMABLE; 223360ce86c7SWei Liu } 223460ce86c7SWei Liu } 223560ce86c7SWei Liu iounit = get_iounit(pdu, &fidp->path); 223660ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 223760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Qd", &qid, iounit); 223860ce86c7SWei Liu if (err < 0) { 223960ce86c7SWei Liu goto out; 224060ce86c7SWei Liu } 224160ce86c7SWei Liu err += offset; 224260ce86c7SWei Liu trace_v9fs_create_return(pdu->tag, pdu->id, 224360ce86c7SWei Liu qid.type, qid.version, qid.path, iounit); 224460ce86c7SWei Liu out: 224560ce86c7SWei Liu put_fid(pdu, fidp); 224660ce86c7SWei Liu out_nofid: 224760ce86c7SWei Liu pdu_complete(pdu, err); 224860ce86c7SWei Liu v9fs_string_free(&name); 224960ce86c7SWei Liu v9fs_string_free(&extension); 225060ce86c7SWei Liu v9fs_path_free(&path); 225160ce86c7SWei Liu } 225260ce86c7SWei Liu 225360ce86c7SWei Liu static void v9fs_symlink(void *opaque) 225460ce86c7SWei Liu { 225560ce86c7SWei Liu V9fsPDU *pdu = opaque; 225660ce86c7SWei Liu V9fsString name; 225760ce86c7SWei Liu V9fsString symname; 225860ce86c7SWei Liu V9fsFidState *dfidp; 225960ce86c7SWei Liu V9fsQID qid; 226060ce86c7SWei Liu struct stat stbuf; 226160ce86c7SWei Liu int32_t dfid; 226260ce86c7SWei Liu int err = 0; 226360ce86c7SWei Liu gid_t gid; 226460ce86c7SWei Liu size_t offset = 7; 226560ce86c7SWei Liu 226660ce86c7SWei Liu v9fs_string_init(&name); 226760ce86c7SWei Liu v9fs_string_init(&symname); 226860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); 226960ce86c7SWei Liu if (err < 0) { 227060ce86c7SWei Liu goto out_nofid; 227160ce86c7SWei Liu } 227260ce86c7SWei Liu trace_v9fs_symlink(pdu->tag, pdu->id, dfid, name.data, symname.data, gid); 227360ce86c7SWei Liu 2274fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2275fff39a7aSGreg Kurz err = -ENOENT; 2276fff39a7aSGreg Kurz goto out_nofid; 2277fff39a7aSGreg Kurz } 2278fff39a7aSGreg Kurz 2279*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2280*805b5d98SGreg Kurz err = -EEXIST; 2281*805b5d98SGreg Kurz goto out_nofid; 2282*805b5d98SGreg Kurz } 2283*805b5d98SGreg Kurz 228460ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 228560ce86c7SWei Liu if (dfidp == NULL) { 228660ce86c7SWei Liu err = -EINVAL; 228760ce86c7SWei Liu goto out_nofid; 228860ce86c7SWei Liu } 228960ce86c7SWei Liu err = v9fs_co_symlink(pdu, dfidp, &name, symname.data, gid, &stbuf); 229060ce86c7SWei Liu if (err < 0) { 229160ce86c7SWei Liu goto out; 229260ce86c7SWei Liu } 229360ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 229460ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 229560ce86c7SWei Liu if (err < 0) { 229660ce86c7SWei Liu goto out; 229760ce86c7SWei Liu } 229860ce86c7SWei Liu err += offset; 229960ce86c7SWei Liu trace_v9fs_symlink_return(pdu->tag, pdu->id, 230060ce86c7SWei Liu qid.type, qid.version, qid.path); 230160ce86c7SWei Liu out: 230260ce86c7SWei Liu put_fid(pdu, dfidp); 230360ce86c7SWei Liu out_nofid: 230460ce86c7SWei Liu pdu_complete(pdu, err); 230560ce86c7SWei Liu v9fs_string_free(&name); 230660ce86c7SWei Liu v9fs_string_free(&symname); 230760ce86c7SWei Liu } 230860ce86c7SWei Liu 230960ce86c7SWei Liu static void v9fs_flush(void *opaque) 231060ce86c7SWei Liu { 231160ce86c7SWei Liu ssize_t err; 231260ce86c7SWei Liu int16_t tag; 231360ce86c7SWei Liu size_t offset = 7; 231460ce86c7SWei Liu V9fsPDU *cancel_pdu; 231560ce86c7SWei Liu V9fsPDU *pdu = opaque; 231660ce86c7SWei Liu V9fsState *s = pdu->s; 231760ce86c7SWei Liu 231860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "w", &tag); 231960ce86c7SWei Liu if (err < 0) { 232060ce86c7SWei Liu pdu_complete(pdu, err); 232160ce86c7SWei Liu return; 232260ce86c7SWei Liu } 232360ce86c7SWei Liu trace_v9fs_flush(pdu->tag, pdu->id, tag); 232460ce86c7SWei Liu 232560ce86c7SWei Liu QLIST_FOREACH(cancel_pdu, &s->active_list, next) { 232660ce86c7SWei Liu if (cancel_pdu->tag == tag) { 232760ce86c7SWei Liu break; 232860ce86c7SWei Liu } 232960ce86c7SWei Liu } 233060ce86c7SWei Liu if (cancel_pdu) { 233160ce86c7SWei Liu cancel_pdu->cancelled = 1; 233260ce86c7SWei Liu /* 233360ce86c7SWei Liu * Wait for pdu to complete. 233460ce86c7SWei Liu */ 233560ce86c7SWei Liu qemu_co_queue_wait(&cancel_pdu->complete); 233660ce86c7SWei Liu cancel_pdu->cancelled = 0; 233760ce86c7SWei Liu pdu_free(cancel_pdu); 233860ce86c7SWei Liu } 233960ce86c7SWei Liu pdu_complete(pdu, 7); 234060ce86c7SWei Liu } 234160ce86c7SWei Liu 234260ce86c7SWei Liu static void v9fs_link(void *opaque) 234360ce86c7SWei Liu { 234460ce86c7SWei Liu V9fsPDU *pdu = opaque; 234560ce86c7SWei Liu int32_t dfid, oldfid; 234660ce86c7SWei Liu V9fsFidState *dfidp, *oldfidp; 234760ce86c7SWei Liu V9fsString name; 234860ce86c7SWei Liu size_t offset = 7; 234960ce86c7SWei Liu int err = 0; 235060ce86c7SWei Liu 235160ce86c7SWei Liu v9fs_string_init(&name); 235260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); 235360ce86c7SWei Liu if (err < 0) { 235460ce86c7SWei Liu goto out_nofid; 235560ce86c7SWei Liu } 235660ce86c7SWei Liu trace_v9fs_link(pdu->tag, pdu->id, dfid, oldfid, name.data); 235760ce86c7SWei Liu 2358fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2359fff39a7aSGreg Kurz err = -ENOENT; 2360fff39a7aSGreg Kurz goto out_nofid; 2361fff39a7aSGreg Kurz } 2362fff39a7aSGreg Kurz 2363*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2364*805b5d98SGreg Kurz err = -EEXIST; 2365*805b5d98SGreg Kurz goto out_nofid; 2366*805b5d98SGreg Kurz } 2367*805b5d98SGreg Kurz 236860ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 236960ce86c7SWei Liu if (dfidp == NULL) { 237060ce86c7SWei Liu err = -ENOENT; 237160ce86c7SWei Liu goto out_nofid; 237260ce86c7SWei Liu } 237360ce86c7SWei Liu 237460ce86c7SWei Liu oldfidp = get_fid(pdu, oldfid); 237560ce86c7SWei Liu if (oldfidp == NULL) { 237660ce86c7SWei Liu err = -ENOENT; 237760ce86c7SWei Liu goto out; 237860ce86c7SWei Liu } 237960ce86c7SWei Liu err = v9fs_co_link(pdu, oldfidp, dfidp, &name); 238060ce86c7SWei Liu if (!err) { 238160ce86c7SWei Liu err = offset; 238260ce86c7SWei Liu } 238360ce86c7SWei Liu out: 238460ce86c7SWei Liu put_fid(pdu, dfidp); 238560ce86c7SWei Liu out_nofid: 238660ce86c7SWei Liu v9fs_string_free(&name); 238760ce86c7SWei Liu pdu_complete(pdu, err); 238860ce86c7SWei Liu } 238960ce86c7SWei Liu 239060ce86c7SWei Liu /* Only works with path name based fid */ 239160ce86c7SWei Liu static void v9fs_remove(void *opaque) 239260ce86c7SWei Liu { 239360ce86c7SWei Liu int32_t fid; 239460ce86c7SWei Liu int err = 0; 239560ce86c7SWei Liu size_t offset = 7; 239660ce86c7SWei Liu V9fsFidState *fidp; 239760ce86c7SWei Liu V9fsPDU *pdu = opaque; 239860ce86c7SWei Liu 239960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 240060ce86c7SWei Liu if (err < 0) { 240160ce86c7SWei Liu goto out_nofid; 240260ce86c7SWei Liu } 240360ce86c7SWei Liu trace_v9fs_remove(pdu->tag, pdu->id, fid); 240460ce86c7SWei Liu 240560ce86c7SWei Liu fidp = get_fid(pdu, fid); 240660ce86c7SWei Liu if (fidp == NULL) { 240760ce86c7SWei Liu err = -EINVAL; 240860ce86c7SWei Liu goto out_nofid; 240960ce86c7SWei Liu } 241060ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 241160ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 241260ce86c7SWei Liu err = -EOPNOTSUPP; 241360ce86c7SWei Liu goto out_err; 241460ce86c7SWei Liu } 241560ce86c7SWei Liu /* 241660ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 241760ce86c7SWei Liu * the file later. So don't reclaim fd 241860ce86c7SWei Liu */ 241960ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &fidp->path); 242060ce86c7SWei Liu if (err < 0) { 242160ce86c7SWei Liu goto out_err; 242260ce86c7SWei Liu } 242360ce86c7SWei Liu err = v9fs_co_remove(pdu, &fidp->path); 242460ce86c7SWei Liu if (!err) { 242560ce86c7SWei Liu err = offset; 242660ce86c7SWei Liu } 242760ce86c7SWei Liu out_err: 242860ce86c7SWei Liu /* For TREMOVE we need to clunk the fid even on failed remove */ 242960ce86c7SWei Liu clunk_fid(pdu->s, fidp->fid); 243060ce86c7SWei Liu put_fid(pdu, fidp); 243160ce86c7SWei Liu out_nofid: 243260ce86c7SWei Liu pdu_complete(pdu, err); 243360ce86c7SWei Liu } 243460ce86c7SWei Liu 243560ce86c7SWei Liu static void v9fs_unlinkat(void *opaque) 243660ce86c7SWei Liu { 243760ce86c7SWei Liu int err = 0; 243860ce86c7SWei Liu V9fsString name; 243960ce86c7SWei Liu int32_t dfid, flags; 244060ce86c7SWei Liu size_t offset = 7; 244160ce86c7SWei Liu V9fsPath path; 244260ce86c7SWei Liu V9fsFidState *dfidp; 244360ce86c7SWei Liu V9fsPDU *pdu = opaque; 244460ce86c7SWei Liu 244560ce86c7SWei Liu v9fs_string_init(&name); 244660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsd", &dfid, &name, &flags); 244760ce86c7SWei Liu if (err < 0) { 244860ce86c7SWei Liu goto out_nofid; 244960ce86c7SWei Liu } 2450fff39a7aSGreg Kurz 2451fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2452fff39a7aSGreg Kurz err = -ENOENT; 2453fff39a7aSGreg Kurz goto out_nofid; 2454fff39a7aSGreg Kurz } 2455fff39a7aSGreg Kurz 2456*805b5d98SGreg Kurz if (!strcmp(".", name.data)) { 2457*805b5d98SGreg Kurz err = -EINVAL; 2458*805b5d98SGreg Kurz goto out_nofid; 2459*805b5d98SGreg Kurz } 2460*805b5d98SGreg Kurz 2461*805b5d98SGreg Kurz if (!strcmp("..", name.data)) { 2462*805b5d98SGreg Kurz err = -ENOTEMPTY; 2463*805b5d98SGreg Kurz goto out_nofid; 2464*805b5d98SGreg Kurz } 2465*805b5d98SGreg Kurz 246660ce86c7SWei Liu dfidp = get_fid(pdu, dfid); 246760ce86c7SWei Liu if (dfidp == NULL) { 246860ce86c7SWei Liu err = -EINVAL; 246960ce86c7SWei Liu goto out_nofid; 247060ce86c7SWei Liu } 247160ce86c7SWei Liu /* 247260ce86c7SWei Liu * IF the file is unlinked, we cannot reopen 247360ce86c7SWei Liu * the file later. So don't reclaim fd 247460ce86c7SWei Liu */ 247560ce86c7SWei Liu v9fs_path_init(&path); 247660ce86c7SWei Liu err = v9fs_co_name_to_path(pdu, &dfidp->path, name.data, &path); 247760ce86c7SWei Liu if (err < 0) { 247860ce86c7SWei Liu goto out_err; 247960ce86c7SWei Liu } 248060ce86c7SWei Liu err = v9fs_mark_fids_unreclaim(pdu, &path); 248160ce86c7SWei Liu if (err < 0) { 248260ce86c7SWei Liu goto out_err; 248360ce86c7SWei Liu } 248460ce86c7SWei Liu err = v9fs_co_unlinkat(pdu, &dfidp->path, &name, flags); 248560ce86c7SWei Liu if (!err) { 248660ce86c7SWei Liu err = offset; 248760ce86c7SWei Liu } 248860ce86c7SWei Liu out_err: 248960ce86c7SWei Liu put_fid(pdu, dfidp); 249060ce86c7SWei Liu v9fs_path_free(&path); 249160ce86c7SWei Liu out_nofid: 249260ce86c7SWei Liu pdu_complete(pdu, err); 249360ce86c7SWei Liu v9fs_string_free(&name); 249460ce86c7SWei Liu } 249560ce86c7SWei Liu 249660ce86c7SWei Liu 249760ce86c7SWei Liu /* Only works with path name based fid */ 249860ce86c7SWei Liu static int v9fs_complete_rename(V9fsPDU *pdu, V9fsFidState *fidp, 249960ce86c7SWei Liu int32_t newdirfid, V9fsString *name) 250060ce86c7SWei Liu { 250160ce86c7SWei Liu char *end; 250260ce86c7SWei Liu int err = 0; 250360ce86c7SWei Liu V9fsPath new_path; 250460ce86c7SWei Liu V9fsFidState *tfidp; 250560ce86c7SWei Liu V9fsState *s = pdu->s; 250660ce86c7SWei Liu V9fsFidState *dirfidp = NULL; 250760ce86c7SWei Liu char *old_name, *new_name; 250860ce86c7SWei Liu 250960ce86c7SWei Liu v9fs_path_init(&new_path); 251060ce86c7SWei Liu if (newdirfid != -1) { 251160ce86c7SWei Liu dirfidp = get_fid(pdu, newdirfid); 251260ce86c7SWei Liu if (dirfidp == NULL) { 251360ce86c7SWei Liu err = -ENOENT; 251460ce86c7SWei Liu goto out_nofid; 251560ce86c7SWei Liu } 251660ce86c7SWei Liu BUG_ON(dirfidp->fid_type != P9_FID_NONE); 251760ce86c7SWei Liu v9fs_co_name_to_path(pdu, &dirfidp->path, name->data, &new_path); 251860ce86c7SWei Liu } else { 251960ce86c7SWei Liu old_name = fidp->path.data; 252060ce86c7SWei Liu end = strrchr(old_name, '/'); 252160ce86c7SWei Liu if (end) { 252260ce86c7SWei Liu end++; 252360ce86c7SWei Liu } else { 252460ce86c7SWei Liu end = old_name; 252560ce86c7SWei Liu } 252660ce86c7SWei Liu new_name = g_malloc0(end - old_name + name->size + 1); 252760ce86c7SWei Liu strncat(new_name, old_name, end - old_name); 252860ce86c7SWei Liu strncat(new_name + (end - old_name), name->data, name->size); 252960ce86c7SWei Liu v9fs_co_name_to_path(pdu, NULL, new_name, &new_path); 253060ce86c7SWei Liu g_free(new_name); 253160ce86c7SWei Liu } 253260ce86c7SWei Liu err = v9fs_co_rename(pdu, &fidp->path, &new_path); 253360ce86c7SWei Liu if (err < 0) { 253460ce86c7SWei Liu goto out; 253560ce86c7SWei Liu } 253660ce86c7SWei Liu /* 253760ce86c7SWei Liu * Fixup fid's pointing to the old name to 253860ce86c7SWei Liu * start pointing to the new name 253960ce86c7SWei Liu */ 254060ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 254160ce86c7SWei Liu if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { 254260ce86c7SWei Liu /* replace the name */ 254360ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &new_path, strlen(fidp->path.data)); 254460ce86c7SWei Liu } 254560ce86c7SWei Liu } 254660ce86c7SWei Liu out: 254760ce86c7SWei Liu if (dirfidp) { 254860ce86c7SWei Liu put_fid(pdu, dirfidp); 254960ce86c7SWei Liu } 255060ce86c7SWei Liu v9fs_path_free(&new_path); 255160ce86c7SWei Liu out_nofid: 255260ce86c7SWei Liu return err; 255360ce86c7SWei Liu } 255460ce86c7SWei Liu 255560ce86c7SWei Liu /* Only works with path name based fid */ 255660ce86c7SWei Liu static void v9fs_rename(void *opaque) 255760ce86c7SWei Liu { 255860ce86c7SWei Liu int32_t fid; 255960ce86c7SWei Liu ssize_t err = 0; 256060ce86c7SWei Liu size_t offset = 7; 256160ce86c7SWei Liu V9fsString name; 256260ce86c7SWei Liu int32_t newdirfid; 256360ce86c7SWei Liu V9fsFidState *fidp; 256460ce86c7SWei Liu V9fsPDU *pdu = opaque; 256560ce86c7SWei Liu V9fsState *s = pdu->s; 256660ce86c7SWei Liu 256760ce86c7SWei Liu v9fs_string_init(&name); 256860ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); 256960ce86c7SWei Liu if (err < 0) { 257060ce86c7SWei Liu goto out_nofid; 257160ce86c7SWei Liu } 2572fff39a7aSGreg Kurz 2573fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2574fff39a7aSGreg Kurz err = -ENOENT; 2575fff39a7aSGreg Kurz goto out_nofid; 2576fff39a7aSGreg Kurz } 2577fff39a7aSGreg Kurz 2578*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2579*805b5d98SGreg Kurz err = -EISDIR; 2580*805b5d98SGreg Kurz goto out_nofid; 2581*805b5d98SGreg Kurz } 2582*805b5d98SGreg Kurz 258360ce86c7SWei Liu fidp = get_fid(pdu, fid); 258460ce86c7SWei Liu if (fidp == NULL) { 258560ce86c7SWei Liu err = -ENOENT; 258660ce86c7SWei Liu goto out_nofid; 258760ce86c7SWei Liu } 258860ce86c7SWei Liu BUG_ON(fidp->fid_type != P9_FID_NONE); 258960ce86c7SWei Liu /* if fs driver is not path based, return EOPNOTSUPP */ 259060ce86c7SWei Liu if (!(pdu->s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT)) { 259160ce86c7SWei Liu err = -EOPNOTSUPP; 259260ce86c7SWei Liu goto out; 259360ce86c7SWei Liu } 259460ce86c7SWei Liu v9fs_path_write_lock(s); 259560ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, newdirfid, &name); 259660ce86c7SWei Liu v9fs_path_unlock(s); 259760ce86c7SWei Liu if (!err) { 259860ce86c7SWei Liu err = offset; 259960ce86c7SWei Liu } 260060ce86c7SWei Liu out: 260160ce86c7SWei Liu put_fid(pdu, fidp); 260260ce86c7SWei Liu out_nofid: 260360ce86c7SWei Liu pdu_complete(pdu, err); 260460ce86c7SWei Liu v9fs_string_free(&name); 260560ce86c7SWei Liu } 260660ce86c7SWei Liu 260760ce86c7SWei Liu static void v9fs_fix_fid_paths(V9fsPDU *pdu, V9fsPath *olddir, 260860ce86c7SWei Liu V9fsString *old_name, V9fsPath *newdir, 260960ce86c7SWei Liu V9fsString *new_name) 261060ce86c7SWei Liu { 261160ce86c7SWei Liu V9fsFidState *tfidp; 261260ce86c7SWei Liu V9fsPath oldpath, newpath; 261360ce86c7SWei Liu V9fsState *s = pdu->s; 261460ce86c7SWei Liu 261560ce86c7SWei Liu 261660ce86c7SWei Liu v9fs_path_init(&oldpath); 261760ce86c7SWei Liu v9fs_path_init(&newpath); 261860ce86c7SWei Liu v9fs_co_name_to_path(pdu, olddir, old_name->data, &oldpath); 261960ce86c7SWei Liu v9fs_co_name_to_path(pdu, newdir, new_name->data, &newpath); 262060ce86c7SWei Liu 262160ce86c7SWei Liu /* 262260ce86c7SWei Liu * Fixup fid's pointing to the old name to 262360ce86c7SWei Liu * start pointing to the new name 262460ce86c7SWei Liu */ 262560ce86c7SWei Liu for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { 262660ce86c7SWei Liu if (v9fs_path_is_ancestor(&oldpath, &tfidp->path)) { 262760ce86c7SWei Liu /* replace the name */ 262860ce86c7SWei Liu v9fs_fix_path(&tfidp->path, &newpath, strlen(oldpath.data)); 262960ce86c7SWei Liu } 263060ce86c7SWei Liu } 263160ce86c7SWei Liu v9fs_path_free(&oldpath); 263260ce86c7SWei Liu v9fs_path_free(&newpath); 263360ce86c7SWei Liu } 263460ce86c7SWei Liu 263560ce86c7SWei Liu static int v9fs_complete_renameat(V9fsPDU *pdu, int32_t olddirfid, 263660ce86c7SWei Liu V9fsString *old_name, int32_t newdirfid, 263760ce86c7SWei Liu V9fsString *new_name) 263860ce86c7SWei Liu { 263960ce86c7SWei Liu int err = 0; 264060ce86c7SWei Liu V9fsState *s = pdu->s; 264160ce86c7SWei Liu V9fsFidState *newdirfidp = NULL, *olddirfidp = NULL; 264260ce86c7SWei Liu 264360ce86c7SWei Liu olddirfidp = get_fid(pdu, olddirfid); 264460ce86c7SWei Liu if (olddirfidp == NULL) { 264560ce86c7SWei Liu err = -ENOENT; 264660ce86c7SWei Liu goto out; 264760ce86c7SWei Liu } 264860ce86c7SWei Liu if (newdirfid != -1) { 264960ce86c7SWei Liu newdirfidp = get_fid(pdu, newdirfid); 265060ce86c7SWei Liu if (newdirfidp == NULL) { 265160ce86c7SWei Liu err = -ENOENT; 265260ce86c7SWei Liu goto out; 265360ce86c7SWei Liu } 265460ce86c7SWei Liu } else { 265560ce86c7SWei Liu newdirfidp = get_fid(pdu, olddirfid); 265660ce86c7SWei Liu } 265760ce86c7SWei Liu 265860ce86c7SWei Liu err = v9fs_co_renameat(pdu, &olddirfidp->path, old_name, 265960ce86c7SWei Liu &newdirfidp->path, new_name); 266060ce86c7SWei Liu if (err < 0) { 266160ce86c7SWei Liu goto out; 266260ce86c7SWei Liu } 266360ce86c7SWei Liu if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { 266460ce86c7SWei Liu /* Only for path based fid we need to do the below fixup */ 266560ce86c7SWei Liu v9fs_fix_fid_paths(pdu, &olddirfidp->path, old_name, 266660ce86c7SWei Liu &newdirfidp->path, new_name); 266760ce86c7SWei Liu } 266860ce86c7SWei Liu out: 266960ce86c7SWei Liu if (olddirfidp) { 267060ce86c7SWei Liu put_fid(pdu, olddirfidp); 267160ce86c7SWei Liu } 267260ce86c7SWei Liu if (newdirfidp) { 267360ce86c7SWei Liu put_fid(pdu, newdirfidp); 267460ce86c7SWei Liu } 267560ce86c7SWei Liu return err; 267660ce86c7SWei Liu } 267760ce86c7SWei Liu 267860ce86c7SWei Liu static void v9fs_renameat(void *opaque) 267960ce86c7SWei Liu { 268060ce86c7SWei Liu ssize_t err = 0; 268160ce86c7SWei Liu size_t offset = 7; 268260ce86c7SWei Liu V9fsPDU *pdu = opaque; 268360ce86c7SWei Liu V9fsState *s = pdu->s; 268460ce86c7SWei Liu int32_t olddirfid, newdirfid; 268560ce86c7SWei Liu V9fsString old_name, new_name; 268660ce86c7SWei Liu 268760ce86c7SWei Liu v9fs_string_init(&old_name); 268860ce86c7SWei Liu v9fs_string_init(&new_name); 268960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsds", &olddirfid, 269060ce86c7SWei Liu &old_name, &newdirfid, &new_name); 269160ce86c7SWei Liu if (err < 0) { 269260ce86c7SWei Liu goto out_err; 269360ce86c7SWei Liu } 269460ce86c7SWei Liu 2695fff39a7aSGreg Kurz if (name_is_illegal(old_name.data) || name_is_illegal(new_name.data)) { 2696fff39a7aSGreg Kurz err = -ENOENT; 2697fff39a7aSGreg Kurz goto out_err; 2698fff39a7aSGreg Kurz } 2699fff39a7aSGreg Kurz 2700*805b5d98SGreg Kurz if (!strcmp(".", old_name.data) || !strcmp("..", old_name.data) || 2701*805b5d98SGreg Kurz !strcmp(".", new_name.data) || !strcmp("..", new_name.data)) { 2702*805b5d98SGreg Kurz err = -EISDIR; 2703*805b5d98SGreg Kurz goto out_err; 2704*805b5d98SGreg Kurz } 2705*805b5d98SGreg Kurz 270660ce86c7SWei Liu v9fs_path_write_lock(s); 270760ce86c7SWei Liu err = v9fs_complete_renameat(pdu, olddirfid, 270860ce86c7SWei Liu &old_name, newdirfid, &new_name); 270960ce86c7SWei Liu v9fs_path_unlock(s); 271060ce86c7SWei Liu if (!err) { 271160ce86c7SWei Liu err = offset; 271260ce86c7SWei Liu } 271360ce86c7SWei Liu 271460ce86c7SWei Liu out_err: 271560ce86c7SWei Liu pdu_complete(pdu, err); 271660ce86c7SWei Liu v9fs_string_free(&old_name); 271760ce86c7SWei Liu v9fs_string_free(&new_name); 271860ce86c7SWei Liu } 271960ce86c7SWei Liu 272060ce86c7SWei Liu static void v9fs_wstat(void *opaque) 272160ce86c7SWei Liu { 272260ce86c7SWei Liu int32_t fid; 272360ce86c7SWei Liu int err = 0; 272460ce86c7SWei Liu int16_t unused; 272560ce86c7SWei Liu V9fsStat v9stat; 272660ce86c7SWei Liu size_t offset = 7; 272760ce86c7SWei Liu struct stat stbuf; 272860ce86c7SWei Liu V9fsFidState *fidp; 272960ce86c7SWei Liu V9fsPDU *pdu = opaque; 273060ce86c7SWei Liu 273160ce86c7SWei Liu v9fs_stat_init(&v9stat); 273260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); 273360ce86c7SWei Liu if (err < 0) { 273460ce86c7SWei Liu goto out_nofid; 273560ce86c7SWei Liu } 273660ce86c7SWei Liu trace_v9fs_wstat(pdu->tag, pdu->id, fid, 273760ce86c7SWei Liu v9stat.mode, v9stat.atime, v9stat.mtime); 273860ce86c7SWei Liu 273960ce86c7SWei Liu fidp = get_fid(pdu, fid); 274060ce86c7SWei Liu if (fidp == NULL) { 274160ce86c7SWei Liu err = -EINVAL; 274260ce86c7SWei Liu goto out_nofid; 274360ce86c7SWei Liu } 274460ce86c7SWei Liu /* do we need to sync the file? */ 274560ce86c7SWei Liu if (donttouch_stat(&v9stat)) { 274660ce86c7SWei Liu err = v9fs_co_fsync(pdu, fidp, 0); 274760ce86c7SWei Liu goto out; 274860ce86c7SWei Liu } 274960ce86c7SWei Liu if (v9stat.mode != -1) { 275060ce86c7SWei Liu uint32_t v9_mode; 275160ce86c7SWei Liu err = v9fs_co_lstat(pdu, &fidp->path, &stbuf); 275260ce86c7SWei Liu if (err < 0) { 275360ce86c7SWei Liu goto out; 275460ce86c7SWei Liu } 275560ce86c7SWei Liu v9_mode = stat_to_v9mode(&stbuf); 275660ce86c7SWei Liu if ((v9stat.mode & P9_STAT_MODE_TYPE_BITS) != 275760ce86c7SWei Liu (v9_mode & P9_STAT_MODE_TYPE_BITS)) { 275860ce86c7SWei Liu /* Attempting to change the type */ 275960ce86c7SWei Liu err = -EIO; 276060ce86c7SWei Liu goto out; 276160ce86c7SWei Liu } 276260ce86c7SWei Liu err = v9fs_co_chmod(pdu, &fidp->path, 276360ce86c7SWei Liu v9mode_to_mode(v9stat.mode, 276460ce86c7SWei Liu &v9stat.extension)); 276560ce86c7SWei Liu if (err < 0) { 276660ce86c7SWei Liu goto out; 276760ce86c7SWei Liu } 276860ce86c7SWei Liu } 276960ce86c7SWei Liu if (v9stat.mtime != -1 || v9stat.atime != -1) { 277060ce86c7SWei Liu struct timespec times[2]; 277160ce86c7SWei Liu if (v9stat.atime != -1) { 277260ce86c7SWei Liu times[0].tv_sec = v9stat.atime; 277360ce86c7SWei Liu times[0].tv_nsec = 0; 277460ce86c7SWei Liu } else { 277560ce86c7SWei Liu times[0].tv_nsec = UTIME_OMIT; 277660ce86c7SWei Liu } 277760ce86c7SWei Liu if (v9stat.mtime != -1) { 277860ce86c7SWei Liu times[1].tv_sec = v9stat.mtime; 277960ce86c7SWei Liu times[1].tv_nsec = 0; 278060ce86c7SWei Liu } else { 278160ce86c7SWei Liu times[1].tv_nsec = UTIME_OMIT; 278260ce86c7SWei Liu } 278360ce86c7SWei Liu err = v9fs_co_utimensat(pdu, &fidp->path, times); 278460ce86c7SWei Liu if (err < 0) { 278560ce86c7SWei Liu goto out; 278660ce86c7SWei Liu } 278760ce86c7SWei Liu } 278860ce86c7SWei Liu if (v9stat.n_gid != -1 || v9stat.n_uid != -1) { 278960ce86c7SWei Liu err = v9fs_co_chown(pdu, &fidp->path, v9stat.n_uid, v9stat.n_gid); 279060ce86c7SWei Liu if (err < 0) { 279160ce86c7SWei Liu goto out; 279260ce86c7SWei Liu } 279360ce86c7SWei Liu } 279460ce86c7SWei Liu if (v9stat.name.size != 0) { 279560ce86c7SWei Liu err = v9fs_complete_rename(pdu, fidp, -1, &v9stat.name); 279660ce86c7SWei Liu if (err < 0) { 279760ce86c7SWei Liu goto out; 279860ce86c7SWei Liu } 279960ce86c7SWei Liu } 280060ce86c7SWei Liu if (v9stat.length != -1) { 280160ce86c7SWei Liu err = v9fs_co_truncate(pdu, &fidp->path, v9stat.length); 280260ce86c7SWei Liu if (err < 0) { 280360ce86c7SWei Liu goto out; 280460ce86c7SWei Liu } 280560ce86c7SWei Liu } 280660ce86c7SWei Liu err = offset; 280760ce86c7SWei Liu out: 280860ce86c7SWei Liu put_fid(pdu, fidp); 280960ce86c7SWei Liu out_nofid: 281060ce86c7SWei Liu v9fs_stat_free(&v9stat); 281160ce86c7SWei Liu pdu_complete(pdu, err); 281260ce86c7SWei Liu } 281360ce86c7SWei Liu 281460ce86c7SWei Liu static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) 281560ce86c7SWei Liu { 281660ce86c7SWei Liu uint32_t f_type; 281760ce86c7SWei Liu uint32_t f_bsize; 281860ce86c7SWei Liu uint64_t f_blocks; 281960ce86c7SWei Liu uint64_t f_bfree; 282060ce86c7SWei Liu uint64_t f_bavail; 282160ce86c7SWei Liu uint64_t f_files; 282260ce86c7SWei Liu uint64_t f_ffree; 282360ce86c7SWei Liu uint64_t fsid_val; 282460ce86c7SWei Liu uint32_t f_namelen; 282560ce86c7SWei Liu size_t offset = 7; 282660ce86c7SWei Liu int32_t bsize_factor; 282760ce86c7SWei Liu 282860ce86c7SWei Liu /* 282960ce86c7SWei Liu * compute bsize factor based on host file system block size 283060ce86c7SWei Liu * and client msize 283160ce86c7SWei Liu */ 283260ce86c7SWei Liu bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; 283360ce86c7SWei Liu if (!bsize_factor) { 283460ce86c7SWei Liu bsize_factor = 1; 283560ce86c7SWei Liu } 283660ce86c7SWei Liu f_type = stbuf->f_type; 283760ce86c7SWei Liu f_bsize = stbuf->f_bsize; 283860ce86c7SWei Liu f_bsize *= bsize_factor; 283960ce86c7SWei Liu /* 284060ce86c7SWei Liu * f_bsize is adjusted(multiplied) by bsize factor, so we need to 284160ce86c7SWei Liu * adjust(divide) the number of blocks, free blocks and available 284260ce86c7SWei Liu * blocks by bsize factor 284360ce86c7SWei Liu */ 284460ce86c7SWei Liu f_blocks = stbuf->f_blocks/bsize_factor; 284560ce86c7SWei Liu f_bfree = stbuf->f_bfree/bsize_factor; 284660ce86c7SWei Liu f_bavail = stbuf->f_bavail/bsize_factor; 284760ce86c7SWei Liu f_files = stbuf->f_files; 284860ce86c7SWei Liu f_ffree = stbuf->f_ffree; 284960ce86c7SWei Liu fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | 285060ce86c7SWei Liu (unsigned long long)stbuf->f_fsid.__val[1] << 32; 285160ce86c7SWei Liu f_namelen = stbuf->f_namelen; 285260ce86c7SWei Liu 285360ce86c7SWei Liu return pdu_marshal(pdu, offset, "ddqqqqqqd", 285460ce86c7SWei Liu f_type, f_bsize, f_blocks, f_bfree, 285560ce86c7SWei Liu f_bavail, f_files, f_ffree, 285660ce86c7SWei Liu fsid_val, f_namelen); 285760ce86c7SWei Liu } 285860ce86c7SWei Liu 285960ce86c7SWei Liu static void v9fs_statfs(void *opaque) 286060ce86c7SWei Liu { 286160ce86c7SWei Liu int32_t fid; 286260ce86c7SWei Liu ssize_t retval = 0; 286360ce86c7SWei Liu size_t offset = 7; 286460ce86c7SWei Liu V9fsFidState *fidp; 286560ce86c7SWei Liu struct statfs stbuf; 286660ce86c7SWei Liu V9fsPDU *pdu = opaque; 286760ce86c7SWei Liu V9fsState *s = pdu->s; 286860ce86c7SWei Liu 286960ce86c7SWei Liu retval = pdu_unmarshal(pdu, offset, "d", &fid); 287060ce86c7SWei Liu if (retval < 0) { 287160ce86c7SWei Liu goto out_nofid; 287260ce86c7SWei Liu } 287360ce86c7SWei Liu fidp = get_fid(pdu, fid); 287460ce86c7SWei Liu if (fidp == NULL) { 287560ce86c7SWei Liu retval = -ENOENT; 287660ce86c7SWei Liu goto out_nofid; 287760ce86c7SWei Liu } 287860ce86c7SWei Liu retval = v9fs_co_statfs(pdu, &fidp->path, &stbuf); 287960ce86c7SWei Liu if (retval < 0) { 288060ce86c7SWei Liu goto out; 288160ce86c7SWei Liu } 288260ce86c7SWei Liu retval = v9fs_fill_statfs(s, pdu, &stbuf); 288360ce86c7SWei Liu if (retval < 0) { 288460ce86c7SWei Liu goto out; 288560ce86c7SWei Liu } 288660ce86c7SWei Liu retval += offset; 288760ce86c7SWei Liu out: 288860ce86c7SWei Liu put_fid(pdu, fidp); 288960ce86c7SWei Liu out_nofid: 289060ce86c7SWei Liu pdu_complete(pdu, retval); 289160ce86c7SWei Liu } 289260ce86c7SWei Liu 289360ce86c7SWei Liu static void v9fs_mknod(void *opaque) 289460ce86c7SWei Liu { 289560ce86c7SWei Liu 289660ce86c7SWei Liu int mode; 289760ce86c7SWei Liu gid_t gid; 289860ce86c7SWei Liu int32_t fid; 289960ce86c7SWei Liu V9fsQID qid; 290060ce86c7SWei Liu int err = 0; 290160ce86c7SWei Liu int major, minor; 290260ce86c7SWei Liu size_t offset = 7; 290360ce86c7SWei Liu V9fsString name; 290460ce86c7SWei Liu struct stat stbuf; 290560ce86c7SWei Liu V9fsFidState *fidp; 290660ce86c7SWei Liu V9fsPDU *pdu = opaque; 290760ce86c7SWei Liu 290860ce86c7SWei Liu v9fs_string_init(&name); 290960ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, 291060ce86c7SWei Liu &major, &minor, &gid); 291160ce86c7SWei Liu if (err < 0) { 291260ce86c7SWei Liu goto out_nofid; 291360ce86c7SWei Liu } 291460ce86c7SWei Liu trace_v9fs_mknod(pdu->tag, pdu->id, fid, mode, major, minor); 291560ce86c7SWei Liu 2916fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 2917fff39a7aSGreg Kurz err = -ENOENT; 2918fff39a7aSGreg Kurz goto out_nofid; 2919fff39a7aSGreg Kurz } 2920fff39a7aSGreg Kurz 2921*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 2922*805b5d98SGreg Kurz err = -EEXIST; 2923*805b5d98SGreg Kurz goto out_nofid; 2924*805b5d98SGreg Kurz } 2925*805b5d98SGreg Kurz 292660ce86c7SWei Liu fidp = get_fid(pdu, fid); 292760ce86c7SWei Liu if (fidp == NULL) { 292860ce86c7SWei Liu err = -ENOENT; 292960ce86c7SWei Liu goto out_nofid; 293060ce86c7SWei Liu } 293160ce86c7SWei Liu err = v9fs_co_mknod(pdu, fidp, &name, fidp->uid, gid, 293260ce86c7SWei Liu makedev(major, minor), mode, &stbuf); 293360ce86c7SWei Liu if (err < 0) { 293460ce86c7SWei Liu goto out; 293560ce86c7SWei Liu } 293660ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 293760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 293860ce86c7SWei Liu if (err < 0) { 293960ce86c7SWei Liu goto out; 294060ce86c7SWei Liu } 294160ce86c7SWei Liu err += offset; 294260ce86c7SWei Liu trace_v9fs_mknod_return(pdu->tag, pdu->id, 294360ce86c7SWei Liu qid.type, qid.version, qid.path); 294460ce86c7SWei Liu out: 294560ce86c7SWei Liu put_fid(pdu, fidp); 294660ce86c7SWei Liu out_nofid: 294760ce86c7SWei Liu pdu_complete(pdu, err); 294860ce86c7SWei Liu v9fs_string_free(&name); 294960ce86c7SWei Liu } 295060ce86c7SWei Liu 295160ce86c7SWei Liu /* 295260ce86c7SWei Liu * Implement posix byte range locking code 295360ce86c7SWei Liu * Server side handling of locking code is very simple, because 9p server in 295460ce86c7SWei Liu * QEMU can handle only one client. And most of the lock handling 295560ce86c7SWei Liu * (like conflict, merging) etc is done by the VFS layer itself, so no need to 295660ce86c7SWei Liu * do any thing in * qemu 9p server side lock code path. 295760ce86c7SWei Liu * So when a TLOCK request comes, always return success 295860ce86c7SWei Liu */ 295960ce86c7SWei Liu static void v9fs_lock(void *opaque) 296060ce86c7SWei Liu { 296160ce86c7SWei Liu int8_t status; 296260ce86c7SWei Liu V9fsFlock flock; 296360ce86c7SWei Liu size_t offset = 7; 296460ce86c7SWei Liu struct stat stbuf; 296560ce86c7SWei Liu V9fsFidState *fidp; 296660ce86c7SWei Liu int32_t fid, err = 0; 296760ce86c7SWei Liu V9fsPDU *pdu = opaque; 296860ce86c7SWei Liu 296960ce86c7SWei Liu status = P9_LOCK_ERROR; 297060ce86c7SWei Liu v9fs_string_init(&flock.client_id); 297160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock.type, 297260ce86c7SWei Liu &flock.flags, &flock.start, &flock.length, 297360ce86c7SWei Liu &flock.proc_id, &flock.client_id); 297460ce86c7SWei Liu if (err < 0) { 297560ce86c7SWei Liu goto out_nofid; 297660ce86c7SWei Liu } 297760ce86c7SWei Liu trace_v9fs_lock(pdu->tag, pdu->id, fid, 297860ce86c7SWei Liu flock.type, flock.start, flock.length); 297960ce86c7SWei Liu 298060ce86c7SWei Liu 298160ce86c7SWei Liu /* We support only block flag now (that too ignored currently) */ 298260ce86c7SWei Liu if (flock.flags & ~P9_LOCK_FLAGS_BLOCK) { 298360ce86c7SWei Liu err = -EINVAL; 298460ce86c7SWei Liu goto out_nofid; 298560ce86c7SWei Liu } 298660ce86c7SWei Liu fidp = get_fid(pdu, fid); 298760ce86c7SWei Liu if (fidp == NULL) { 298860ce86c7SWei Liu err = -ENOENT; 298960ce86c7SWei Liu goto out_nofid; 299060ce86c7SWei Liu } 299160ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 299260ce86c7SWei Liu if (err < 0) { 299360ce86c7SWei Liu goto out; 299460ce86c7SWei Liu } 299560ce86c7SWei Liu status = P9_LOCK_SUCCESS; 299660ce86c7SWei Liu out: 299760ce86c7SWei Liu put_fid(pdu, fidp); 299860ce86c7SWei Liu out_nofid: 299960ce86c7SWei Liu err = pdu_marshal(pdu, offset, "b", status); 300060ce86c7SWei Liu if (err > 0) { 300160ce86c7SWei Liu err += offset; 300260ce86c7SWei Liu } 300360ce86c7SWei Liu trace_v9fs_lock_return(pdu->tag, pdu->id, status); 300460ce86c7SWei Liu pdu_complete(pdu, err); 300560ce86c7SWei Liu v9fs_string_free(&flock.client_id); 300660ce86c7SWei Liu } 300760ce86c7SWei Liu 300860ce86c7SWei Liu /* 300960ce86c7SWei Liu * When a TGETLOCK request comes, always return success because all lock 301060ce86c7SWei Liu * handling is done by client's VFS layer. 301160ce86c7SWei Liu */ 301260ce86c7SWei Liu static void v9fs_getlock(void *opaque) 301360ce86c7SWei Liu { 301460ce86c7SWei Liu size_t offset = 7; 301560ce86c7SWei Liu struct stat stbuf; 301660ce86c7SWei Liu V9fsFidState *fidp; 301760ce86c7SWei Liu V9fsGetlock glock; 301860ce86c7SWei Liu int32_t fid, err = 0; 301960ce86c7SWei Liu V9fsPDU *pdu = opaque; 302060ce86c7SWei Liu 302160ce86c7SWei Liu v9fs_string_init(&glock.client_id); 302260ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock.type, 302360ce86c7SWei Liu &glock.start, &glock.length, &glock.proc_id, 302460ce86c7SWei Liu &glock.client_id); 302560ce86c7SWei Liu if (err < 0) { 302660ce86c7SWei Liu goto out_nofid; 302760ce86c7SWei Liu } 302860ce86c7SWei Liu trace_v9fs_getlock(pdu->tag, pdu->id, fid, 302960ce86c7SWei Liu glock.type, glock.start, glock.length); 303060ce86c7SWei Liu 303160ce86c7SWei Liu fidp = get_fid(pdu, fid); 303260ce86c7SWei Liu if (fidp == NULL) { 303360ce86c7SWei Liu err = -ENOENT; 303460ce86c7SWei Liu goto out_nofid; 303560ce86c7SWei Liu } 303660ce86c7SWei Liu err = v9fs_co_fstat(pdu, fidp, &stbuf); 303760ce86c7SWei Liu if (err < 0) { 303860ce86c7SWei Liu goto out; 303960ce86c7SWei Liu } 304060ce86c7SWei Liu glock.type = P9_LOCK_TYPE_UNLCK; 304160ce86c7SWei Liu err = pdu_marshal(pdu, offset, "bqqds", glock.type, 304260ce86c7SWei Liu glock.start, glock.length, glock.proc_id, 304360ce86c7SWei Liu &glock.client_id); 304460ce86c7SWei Liu if (err < 0) { 304560ce86c7SWei Liu goto out; 304660ce86c7SWei Liu } 304760ce86c7SWei Liu err += offset; 304860ce86c7SWei Liu trace_v9fs_getlock_return(pdu->tag, pdu->id, glock.type, glock.start, 304960ce86c7SWei Liu glock.length, glock.proc_id); 305060ce86c7SWei Liu out: 305160ce86c7SWei Liu put_fid(pdu, fidp); 305260ce86c7SWei Liu out_nofid: 305360ce86c7SWei Liu pdu_complete(pdu, err); 305460ce86c7SWei Liu v9fs_string_free(&glock.client_id); 305560ce86c7SWei Liu } 305660ce86c7SWei Liu 305760ce86c7SWei Liu static void v9fs_mkdir(void *opaque) 305860ce86c7SWei Liu { 305960ce86c7SWei Liu V9fsPDU *pdu = opaque; 306060ce86c7SWei Liu size_t offset = 7; 306160ce86c7SWei Liu int32_t fid; 306260ce86c7SWei Liu struct stat stbuf; 306360ce86c7SWei Liu V9fsQID qid; 306460ce86c7SWei Liu V9fsString name; 306560ce86c7SWei Liu V9fsFidState *fidp; 306660ce86c7SWei Liu gid_t gid; 306760ce86c7SWei Liu int mode; 306860ce86c7SWei Liu int err = 0; 306960ce86c7SWei Liu 307060ce86c7SWei Liu v9fs_string_init(&name); 307160ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); 307260ce86c7SWei Liu if (err < 0) { 307360ce86c7SWei Liu goto out_nofid; 307460ce86c7SWei Liu } 307560ce86c7SWei Liu trace_v9fs_mkdir(pdu->tag, pdu->id, fid, name.data, mode, gid); 307660ce86c7SWei Liu 3077fff39a7aSGreg Kurz if (name_is_illegal(name.data)) { 3078fff39a7aSGreg Kurz err = -ENOENT; 3079fff39a7aSGreg Kurz goto out_nofid; 3080fff39a7aSGreg Kurz } 3081fff39a7aSGreg Kurz 3082*805b5d98SGreg Kurz if (!strcmp(".", name.data) || !strcmp("..", name.data)) { 3083*805b5d98SGreg Kurz err = -EEXIST; 3084*805b5d98SGreg Kurz goto out_nofid; 3085*805b5d98SGreg Kurz } 3086*805b5d98SGreg Kurz 308760ce86c7SWei Liu fidp = get_fid(pdu, fid); 308860ce86c7SWei Liu if (fidp == NULL) { 308960ce86c7SWei Liu err = -ENOENT; 309060ce86c7SWei Liu goto out_nofid; 309160ce86c7SWei Liu } 309260ce86c7SWei Liu err = v9fs_co_mkdir(pdu, fidp, &name, mode, fidp->uid, gid, &stbuf); 309360ce86c7SWei Liu if (err < 0) { 309460ce86c7SWei Liu goto out; 309560ce86c7SWei Liu } 309660ce86c7SWei Liu stat_to_qid(&stbuf, &qid); 309760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "Q", &qid); 309860ce86c7SWei Liu if (err < 0) { 309960ce86c7SWei Liu goto out; 310060ce86c7SWei Liu } 310160ce86c7SWei Liu err += offset; 310260ce86c7SWei Liu trace_v9fs_mkdir_return(pdu->tag, pdu->id, 310360ce86c7SWei Liu qid.type, qid.version, qid.path, err); 310460ce86c7SWei Liu out: 310560ce86c7SWei Liu put_fid(pdu, fidp); 310660ce86c7SWei Liu out_nofid: 310760ce86c7SWei Liu pdu_complete(pdu, err); 310860ce86c7SWei Liu v9fs_string_free(&name); 310960ce86c7SWei Liu } 311060ce86c7SWei Liu 311160ce86c7SWei Liu static void v9fs_xattrwalk(void *opaque) 311260ce86c7SWei Liu { 311360ce86c7SWei Liu int64_t size; 311460ce86c7SWei Liu V9fsString name; 311560ce86c7SWei Liu ssize_t err = 0; 311660ce86c7SWei Liu size_t offset = 7; 311760ce86c7SWei Liu int32_t fid, newfid; 311860ce86c7SWei Liu V9fsFidState *file_fidp; 311960ce86c7SWei Liu V9fsFidState *xattr_fidp = NULL; 312060ce86c7SWei Liu V9fsPDU *pdu = opaque; 312160ce86c7SWei Liu V9fsState *s = pdu->s; 312260ce86c7SWei Liu 312360ce86c7SWei Liu v9fs_string_init(&name); 312460ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); 312560ce86c7SWei Liu if (err < 0) { 312660ce86c7SWei Liu goto out_nofid; 312760ce86c7SWei Liu } 312860ce86c7SWei Liu trace_v9fs_xattrwalk(pdu->tag, pdu->id, fid, newfid, name.data); 312960ce86c7SWei Liu 313060ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 313160ce86c7SWei Liu if (file_fidp == NULL) { 313260ce86c7SWei Liu err = -ENOENT; 313360ce86c7SWei Liu goto out_nofid; 313460ce86c7SWei Liu } 313560ce86c7SWei Liu xattr_fidp = alloc_fid(s, newfid); 313660ce86c7SWei Liu if (xattr_fidp == NULL) { 313760ce86c7SWei Liu err = -EINVAL; 313860ce86c7SWei Liu goto out; 313960ce86c7SWei Liu } 314060ce86c7SWei Liu v9fs_path_copy(&xattr_fidp->path, &file_fidp->path); 314160ce86c7SWei Liu if (name.data == NULL) { 314260ce86c7SWei Liu /* 314360ce86c7SWei Liu * listxattr request. Get the size first 314460ce86c7SWei Liu */ 314560ce86c7SWei Liu size = v9fs_co_llistxattr(pdu, &xattr_fidp->path, NULL, 0); 314660ce86c7SWei Liu if (size < 0) { 314760ce86c7SWei Liu err = size; 314860ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 314960ce86c7SWei Liu goto out; 315060ce86c7SWei Liu } 315160ce86c7SWei Liu /* 315260ce86c7SWei Liu * Read the xattr value 315360ce86c7SWei Liu */ 315460ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 315560ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 315660ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = -1; 315760ce86c7SWei Liu if (size) { 315860ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 315960ce86c7SWei Liu err = v9fs_co_llistxattr(pdu, &xattr_fidp->path, 316060ce86c7SWei Liu xattr_fidp->fs.xattr.value, 316160ce86c7SWei Liu xattr_fidp->fs.xattr.len); 316260ce86c7SWei Liu if (err < 0) { 316360ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 316460ce86c7SWei Liu goto out; 316560ce86c7SWei Liu } 316660ce86c7SWei Liu } 316760ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 316860ce86c7SWei Liu if (err < 0) { 316960ce86c7SWei Liu goto out; 317060ce86c7SWei Liu } 317160ce86c7SWei Liu err += offset; 317260ce86c7SWei Liu } else { 317360ce86c7SWei Liu /* 317460ce86c7SWei Liu * specific xattr fid. We check for xattr 317560ce86c7SWei Liu * presence also collect the xattr size 317660ce86c7SWei Liu */ 317760ce86c7SWei Liu size = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 317860ce86c7SWei Liu &name, NULL, 0); 317960ce86c7SWei Liu if (size < 0) { 318060ce86c7SWei Liu err = size; 318160ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 318260ce86c7SWei Liu goto out; 318360ce86c7SWei Liu } 318460ce86c7SWei Liu /* 318560ce86c7SWei Liu * Read the xattr value 318660ce86c7SWei Liu */ 318760ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 318860ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 318960ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = -1; 319060ce86c7SWei Liu if (size) { 319160ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 319260ce86c7SWei Liu err = v9fs_co_lgetxattr(pdu, &xattr_fidp->path, 319360ce86c7SWei Liu &name, xattr_fidp->fs.xattr.value, 319460ce86c7SWei Liu xattr_fidp->fs.xattr.len); 319560ce86c7SWei Liu if (err < 0) { 319660ce86c7SWei Liu clunk_fid(s, xattr_fidp->fid); 319760ce86c7SWei Liu goto out; 319860ce86c7SWei Liu } 319960ce86c7SWei Liu } 320060ce86c7SWei Liu err = pdu_marshal(pdu, offset, "q", size); 320160ce86c7SWei Liu if (err < 0) { 320260ce86c7SWei Liu goto out; 320360ce86c7SWei Liu } 320460ce86c7SWei Liu err += offset; 320560ce86c7SWei Liu } 320660ce86c7SWei Liu trace_v9fs_xattrwalk_return(pdu->tag, pdu->id, size); 320760ce86c7SWei Liu out: 320860ce86c7SWei Liu put_fid(pdu, file_fidp); 320960ce86c7SWei Liu if (xattr_fidp) { 321060ce86c7SWei Liu put_fid(pdu, xattr_fidp); 321160ce86c7SWei Liu } 321260ce86c7SWei Liu out_nofid: 321360ce86c7SWei Liu pdu_complete(pdu, err); 321460ce86c7SWei Liu v9fs_string_free(&name); 321560ce86c7SWei Liu } 321660ce86c7SWei Liu 321760ce86c7SWei Liu static void v9fs_xattrcreate(void *opaque) 321860ce86c7SWei Liu { 321960ce86c7SWei Liu int flags; 322060ce86c7SWei Liu int32_t fid; 322160ce86c7SWei Liu int64_t size; 322260ce86c7SWei Liu ssize_t err = 0; 322360ce86c7SWei Liu V9fsString name; 322460ce86c7SWei Liu size_t offset = 7; 322560ce86c7SWei Liu V9fsFidState *file_fidp; 322660ce86c7SWei Liu V9fsFidState *xattr_fidp; 322760ce86c7SWei Liu V9fsPDU *pdu = opaque; 322860ce86c7SWei Liu 322960ce86c7SWei Liu v9fs_string_init(&name); 323060ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); 323160ce86c7SWei Liu if (err < 0) { 323260ce86c7SWei Liu goto out_nofid; 323360ce86c7SWei Liu } 323460ce86c7SWei Liu trace_v9fs_xattrcreate(pdu->tag, pdu->id, fid, name.data, size, flags); 323560ce86c7SWei Liu 323660ce86c7SWei Liu file_fidp = get_fid(pdu, fid); 323760ce86c7SWei Liu if (file_fidp == NULL) { 323860ce86c7SWei Liu err = -EINVAL; 323960ce86c7SWei Liu goto out_nofid; 324060ce86c7SWei Liu } 324160ce86c7SWei Liu /* Make the file fid point to xattr */ 324260ce86c7SWei Liu xattr_fidp = file_fidp; 324360ce86c7SWei Liu xattr_fidp->fid_type = P9_FID_XATTR; 324460ce86c7SWei Liu xattr_fidp->fs.xattr.copied_len = 0; 324560ce86c7SWei Liu xattr_fidp->fs.xattr.len = size; 324660ce86c7SWei Liu xattr_fidp->fs.xattr.flags = flags; 324760ce86c7SWei Liu v9fs_string_init(&xattr_fidp->fs.xattr.name); 324860ce86c7SWei Liu v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); 324960ce86c7SWei Liu xattr_fidp->fs.xattr.value = g_malloc(size); 325060ce86c7SWei Liu err = offset; 325160ce86c7SWei Liu put_fid(pdu, file_fidp); 325260ce86c7SWei Liu out_nofid: 325360ce86c7SWei Liu pdu_complete(pdu, err); 325460ce86c7SWei Liu v9fs_string_free(&name); 325560ce86c7SWei Liu } 325660ce86c7SWei Liu 325760ce86c7SWei Liu static void v9fs_readlink(void *opaque) 325860ce86c7SWei Liu { 325960ce86c7SWei Liu V9fsPDU *pdu = opaque; 326060ce86c7SWei Liu size_t offset = 7; 326160ce86c7SWei Liu V9fsString target; 326260ce86c7SWei Liu int32_t fid; 326360ce86c7SWei Liu int err = 0; 326460ce86c7SWei Liu V9fsFidState *fidp; 326560ce86c7SWei Liu 326660ce86c7SWei Liu err = pdu_unmarshal(pdu, offset, "d", &fid); 326760ce86c7SWei Liu if (err < 0) { 326860ce86c7SWei Liu goto out_nofid; 326960ce86c7SWei Liu } 327060ce86c7SWei Liu trace_v9fs_readlink(pdu->tag, pdu->id, fid); 327160ce86c7SWei Liu fidp = get_fid(pdu, fid); 327260ce86c7SWei Liu if (fidp == NULL) { 327360ce86c7SWei Liu err = -ENOENT; 327460ce86c7SWei Liu goto out_nofid; 327560ce86c7SWei Liu } 327660ce86c7SWei Liu 327760ce86c7SWei Liu v9fs_string_init(&target); 327860ce86c7SWei Liu err = v9fs_co_readlink(pdu, &fidp->path, &target); 327960ce86c7SWei Liu if (err < 0) { 328060ce86c7SWei Liu goto out; 328160ce86c7SWei Liu } 328260ce86c7SWei Liu err = pdu_marshal(pdu, offset, "s", &target); 328360ce86c7SWei Liu if (err < 0) { 328460ce86c7SWei Liu v9fs_string_free(&target); 328560ce86c7SWei Liu goto out; 328660ce86c7SWei Liu } 328760ce86c7SWei Liu err += offset; 328860ce86c7SWei Liu trace_v9fs_readlink_return(pdu->tag, pdu->id, target.data); 328960ce86c7SWei Liu v9fs_string_free(&target); 329060ce86c7SWei Liu out: 329160ce86c7SWei Liu put_fid(pdu, fidp); 329260ce86c7SWei Liu out_nofid: 329360ce86c7SWei Liu pdu_complete(pdu, err); 329460ce86c7SWei Liu } 329560ce86c7SWei Liu 329660ce86c7SWei Liu static CoroutineEntry *pdu_co_handlers[] = { 329760ce86c7SWei Liu [P9_TREADDIR] = v9fs_readdir, 329860ce86c7SWei Liu [P9_TSTATFS] = v9fs_statfs, 329960ce86c7SWei Liu [P9_TGETATTR] = v9fs_getattr, 330060ce86c7SWei Liu [P9_TSETATTR] = v9fs_setattr, 330160ce86c7SWei Liu [P9_TXATTRWALK] = v9fs_xattrwalk, 330260ce86c7SWei Liu [P9_TXATTRCREATE] = v9fs_xattrcreate, 330360ce86c7SWei Liu [P9_TMKNOD] = v9fs_mknod, 330460ce86c7SWei Liu [P9_TRENAME] = v9fs_rename, 330560ce86c7SWei Liu [P9_TLOCK] = v9fs_lock, 330660ce86c7SWei Liu [P9_TGETLOCK] = v9fs_getlock, 330760ce86c7SWei Liu [P9_TRENAMEAT] = v9fs_renameat, 330860ce86c7SWei Liu [P9_TREADLINK] = v9fs_readlink, 330960ce86c7SWei Liu [P9_TUNLINKAT] = v9fs_unlinkat, 331060ce86c7SWei Liu [P9_TMKDIR] = v9fs_mkdir, 331160ce86c7SWei Liu [P9_TVERSION] = v9fs_version, 331260ce86c7SWei Liu [P9_TLOPEN] = v9fs_open, 331360ce86c7SWei Liu [P9_TATTACH] = v9fs_attach, 331460ce86c7SWei Liu [P9_TSTAT] = v9fs_stat, 331560ce86c7SWei Liu [P9_TWALK] = v9fs_walk, 331660ce86c7SWei Liu [P9_TCLUNK] = v9fs_clunk, 331760ce86c7SWei Liu [P9_TFSYNC] = v9fs_fsync, 331860ce86c7SWei Liu [P9_TOPEN] = v9fs_open, 331960ce86c7SWei Liu [P9_TREAD] = v9fs_read, 332060ce86c7SWei Liu #if 0 332160ce86c7SWei Liu [P9_TAUTH] = v9fs_auth, 332260ce86c7SWei Liu #endif 332360ce86c7SWei Liu [P9_TFLUSH] = v9fs_flush, 332460ce86c7SWei Liu [P9_TLINK] = v9fs_link, 332560ce86c7SWei Liu [P9_TSYMLINK] = v9fs_symlink, 332660ce86c7SWei Liu [P9_TCREATE] = v9fs_create, 332760ce86c7SWei Liu [P9_TLCREATE] = v9fs_lcreate, 332860ce86c7SWei Liu [P9_TWRITE] = v9fs_write, 332960ce86c7SWei Liu [P9_TWSTAT] = v9fs_wstat, 333060ce86c7SWei Liu [P9_TREMOVE] = v9fs_remove, 333160ce86c7SWei Liu }; 333260ce86c7SWei Liu 333360ce86c7SWei Liu static void v9fs_op_not_supp(void *opaque) 333460ce86c7SWei Liu { 333560ce86c7SWei Liu V9fsPDU *pdu = opaque; 333660ce86c7SWei Liu pdu_complete(pdu, -EOPNOTSUPP); 333760ce86c7SWei Liu } 333860ce86c7SWei Liu 333960ce86c7SWei Liu static void v9fs_fs_ro(void *opaque) 334060ce86c7SWei Liu { 334160ce86c7SWei Liu V9fsPDU *pdu = opaque; 334260ce86c7SWei Liu pdu_complete(pdu, -EROFS); 334360ce86c7SWei Liu } 334460ce86c7SWei Liu 334560ce86c7SWei Liu static inline bool is_read_only_op(V9fsPDU *pdu) 334660ce86c7SWei Liu { 334760ce86c7SWei Liu switch (pdu->id) { 334860ce86c7SWei Liu case P9_TREADDIR: 334960ce86c7SWei Liu case P9_TSTATFS: 335060ce86c7SWei Liu case P9_TGETATTR: 335160ce86c7SWei Liu case P9_TXATTRWALK: 335260ce86c7SWei Liu case P9_TLOCK: 335360ce86c7SWei Liu case P9_TGETLOCK: 335460ce86c7SWei Liu case P9_TREADLINK: 335560ce86c7SWei Liu case P9_TVERSION: 335660ce86c7SWei Liu case P9_TLOPEN: 335760ce86c7SWei Liu case P9_TATTACH: 335860ce86c7SWei Liu case P9_TSTAT: 335960ce86c7SWei Liu case P9_TWALK: 336060ce86c7SWei Liu case P9_TCLUNK: 336160ce86c7SWei Liu case P9_TFSYNC: 336260ce86c7SWei Liu case P9_TOPEN: 336360ce86c7SWei Liu case P9_TREAD: 336460ce86c7SWei Liu case P9_TAUTH: 336560ce86c7SWei Liu case P9_TFLUSH: 336660ce86c7SWei Liu return 1; 336760ce86c7SWei Liu default: 336860ce86c7SWei Liu return 0; 336960ce86c7SWei Liu } 337060ce86c7SWei Liu } 337160ce86c7SWei Liu 337260ce86c7SWei Liu void pdu_submit(V9fsPDU *pdu) 337360ce86c7SWei Liu { 337460ce86c7SWei Liu Coroutine *co; 337560ce86c7SWei Liu CoroutineEntry *handler; 337660ce86c7SWei Liu V9fsState *s = pdu->s; 337760ce86c7SWei Liu 337860ce86c7SWei Liu if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || 337960ce86c7SWei Liu (pdu_co_handlers[pdu->id] == NULL)) { 338060ce86c7SWei Liu handler = v9fs_op_not_supp; 338160ce86c7SWei Liu } else { 338260ce86c7SWei Liu handler = pdu_co_handlers[pdu->id]; 338360ce86c7SWei Liu } 338460ce86c7SWei Liu 338560ce86c7SWei Liu if (is_ro_export(&s->ctx) && !is_read_only_op(pdu)) { 338660ce86c7SWei Liu handler = v9fs_fs_ro; 338760ce86c7SWei Liu } 33880b8b8753SPaolo Bonzini co = qemu_coroutine_create(handler, pdu); 33890b8b8753SPaolo Bonzini qemu_coroutine_enter(co); 339060ce86c7SWei Liu } 339160ce86c7SWei Liu 33922a0c56aaSWei Liu /* Returns 0 on success, 1 on failure. */ 33932a0c56aaSWei Liu int v9fs_device_realize_common(V9fsState *s, Error **errp) 33942a0c56aaSWei Liu { 339500588a0aSWei Liu V9fsVirtioState *v = container_of(s, V9fsVirtioState, state); 33962a0c56aaSWei Liu int i, len; 33972a0c56aaSWei Liu struct stat stat; 33982a0c56aaSWei Liu FsDriverEntry *fse; 33992a0c56aaSWei Liu V9fsPath path; 34002a0c56aaSWei Liu int rc = 1; 34012a0c56aaSWei Liu 34022a0c56aaSWei Liu /* initialize pdu allocator */ 34032a0c56aaSWei Liu QLIST_INIT(&s->free_list); 34042a0c56aaSWei Liu QLIST_INIT(&s->active_list); 34052a0c56aaSWei Liu for (i = 0; i < (MAX_REQ - 1); i++) { 340600588a0aSWei Liu QLIST_INSERT_HEAD(&s->free_list, &v->pdus[i], next); 340700588a0aSWei Liu v->pdus[i].s = s; 340800588a0aSWei Liu v->pdus[i].idx = i; 34092a0c56aaSWei Liu } 34102a0c56aaSWei Liu 34112a0c56aaSWei Liu v9fs_path_init(&path); 34122a0c56aaSWei Liu 34132a0c56aaSWei Liu fse = get_fsdev_fsentry(s->fsconf.fsdev_id); 34142a0c56aaSWei Liu 34152a0c56aaSWei Liu if (!fse) { 34162a0c56aaSWei Liu /* We don't have a fsdev identified by fsdev_id */ 34172a0c56aaSWei Liu error_setg(errp, "9pfs device couldn't find fsdev with the " 34182a0c56aaSWei Liu "id = %s", 34192a0c56aaSWei Liu s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); 34202a0c56aaSWei Liu goto out; 34212a0c56aaSWei Liu } 34222a0c56aaSWei Liu 34232a0c56aaSWei Liu if (!s->fsconf.tag) { 34242a0c56aaSWei Liu /* we haven't specified a mount_tag */ 34252a0c56aaSWei Liu error_setg(errp, "fsdev with id %s needs mount_tag arguments", 34262a0c56aaSWei Liu s->fsconf.fsdev_id); 34272a0c56aaSWei Liu goto out; 34282a0c56aaSWei Liu } 34292a0c56aaSWei Liu 34302a0c56aaSWei Liu s->ctx.export_flags = fse->export_flags; 34312a0c56aaSWei Liu s->ctx.fs_root = g_strdup(fse->path); 34322a0c56aaSWei Liu s->ctx.exops.get_st_gen = NULL; 34332a0c56aaSWei Liu len = strlen(s->fsconf.tag); 34342a0c56aaSWei Liu if (len > MAX_TAG_LEN - 1) { 34352a0c56aaSWei Liu error_setg(errp, "mount tag '%s' (%d bytes) is longer than " 34362a0c56aaSWei Liu "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1); 34372a0c56aaSWei Liu goto out; 34382a0c56aaSWei Liu } 34392a0c56aaSWei Liu 34402a0c56aaSWei Liu s->tag = g_strdup(s->fsconf.tag); 34412a0c56aaSWei Liu s->ctx.uid = -1; 34422a0c56aaSWei Liu 34432a0c56aaSWei Liu s->ops = fse->ops; 34442a0c56aaSWei Liu 34452a0c56aaSWei Liu s->fid_list = NULL; 34462a0c56aaSWei Liu qemu_co_rwlock_init(&s->rename_lock); 34472a0c56aaSWei Liu 34482a0c56aaSWei Liu if (s->ops->init(&s->ctx) < 0) { 34492a0c56aaSWei Liu error_setg(errp, "9pfs Failed to initialize fs-driver with id:%s" 34502a0c56aaSWei Liu " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root); 34512a0c56aaSWei Liu goto out; 34522a0c56aaSWei Liu } 34532a0c56aaSWei Liu 34542a0c56aaSWei Liu /* 34552a0c56aaSWei Liu * Check details of export path, We need to use fs driver 34562a0c56aaSWei Liu * call back to do that. Since we are in the init path, we don't 34572a0c56aaSWei Liu * use co-routines here. 34582a0c56aaSWei Liu */ 34592a0c56aaSWei Liu if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) { 34602a0c56aaSWei Liu error_setg(errp, 34612a0c56aaSWei Liu "error in converting name to path %s", strerror(errno)); 34622a0c56aaSWei Liu goto out; 34632a0c56aaSWei Liu } 34642a0c56aaSWei Liu if (s->ops->lstat(&s->ctx, &path, &stat)) { 34652a0c56aaSWei Liu error_setg(errp, "share path %s does not exist", fse->path); 34662a0c56aaSWei Liu goto out; 34672a0c56aaSWei Liu } else if (!S_ISDIR(stat.st_mode)) { 34682a0c56aaSWei Liu error_setg(errp, "share path %s is not a directory", fse->path); 34692a0c56aaSWei Liu goto out; 34702a0c56aaSWei Liu } 34712a0c56aaSWei Liu v9fs_path_free(&path); 34722a0c56aaSWei Liu 34732a0c56aaSWei Liu rc = 0; 34742a0c56aaSWei Liu out: 34752a0c56aaSWei Liu if (rc) { 34762a0c56aaSWei Liu g_free(s->ctx.fs_root); 34772a0c56aaSWei Liu g_free(s->tag); 34782a0c56aaSWei Liu v9fs_path_free(&path); 34792a0c56aaSWei Liu } 34802a0c56aaSWei Liu return rc; 34812a0c56aaSWei Liu } 34822a0c56aaSWei Liu 34832a0c56aaSWei Liu void v9fs_device_unrealize_common(V9fsState *s, Error **errp) 34842a0c56aaSWei Liu { 34852a0c56aaSWei Liu g_free(s->ctx.fs_root); 34862a0c56aaSWei Liu g_free(s->tag); 34872a0c56aaSWei Liu } 34882a0c56aaSWei Liu 348960ce86c7SWei Liu static void __attribute__((__constructor__)) v9fs_set_fd_limit(void) 349060ce86c7SWei Liu { 349160ce86c7SWei Liu struct rlimit rlim; 349260ce86c7SWei Liu if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) { 349363325b18SGreg Kurz error_report("Failed to get the resource limit"); 349460ce86c7SWei Liu exit(1); 349560ce86c7SWei Liu } 349660ce86c7SWei Liu open_fd_hw = rlim.rlim_cur - MIN(400, rlim.rlim_cur/3); 349760ce86c7SWei Liu open_fd_rc = rlim.rlim_cur/2; 349860ce86c7SWei Liu } 3499