Mercurial > nomad > experimental
view src/objstore/obj_link.c @ 1298:d9e0b59c30f0
objstore: move objstore_{,sym}link to obj_link.c
Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
author | Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
---|---|
date | Mon, 19 Dec 2022 20:11:14 -0500 |
parents | 9b1ce98807c0 |
children |
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/* * Copyright (c) 2020,2022 Josef 'Jeff' Sipek <jeffpc@josefsipek.net> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include "dir.h" #include <jeffpc/time.h> int dir_symlink(struct txn *txn, struct objver *dirver, const char *name, uint32_t owner, uint32_t group, uint16_t mode, const char *target, struct noid *_child) { const uint64_t now = gettime(); struct nattr attrs = { .mode = mode, .nlink = 1, .size = strlen(target), .atime = now, .btime = now, .ctime = now, .mtime = now, .owner = owner, .group = group, }; uint8_t raw[DIR_BLOCK_SIZE]; struct ndirent_mem ent; bool update_existing; struct objver *child; uint16_t ndirents; uint64_t diroff; ssize_t ret; ASSERT(NATTR_ISLNK(mode)); ret = dir_lookup_entry(dirver, name, raw, &ent, &diroff, &ndirents); if (ret) { /* error or didn't find anything */ if (ret != -ENOENT) return ret; update_existing = false; } else { /* found something */ if (!ent.all_deleted) return -EEXIST; update_existing = true; } /* make new oid for the child */ child = obj_create(txn, &attrs, &dirver->obj->oid); if (IS_ERR(child)) return PTR_ERR(child); /* write out symlink target */ ret = obj_write(txn, child, target, strlen(target), 0); if (ret < 0) goto err; if (ret != strlen(target)) { ret = -EIO; goto err; } /* add dirent to parent dir */ if (!update_existing) { ret = dir_add_dirent(txn, dirver, name, mode, &child->obj->oid); if (ret) return ret; } else { ret = dir_update_dirent(txn, dirver, raw, diroff, ndirents, name, mode, &child->obj->oid); if (ret) return ret; } *_child = child->obj->oid; ret = 0; err: obj_putref(child->obj); return ret; } int objstore_symlink(struct objstore_open_obj_info *diropen, const char *name, uint32_t owner, uint32_t group, uint16_t mode, const char *target, struct noid *child) { struct objver *newver; struct obj *dir; struct txn *txn; int ret; if (!diropen || !name || !target) return -EINVAL; /* must have a type */ if (!NATTR_ISLNK(mode)) return -EINVAL; dir = diropen->obj; if (diropen->qualified) return -EROFS; MXLOCK(&dir->lock); if (!NATTR_ISDIR(diropen->ver->attrs.mode)) { ret = -ENOTDIR; goto err; } txn = txn_begin(diropen->ver->obj->clone); if (IS_ERR(txn)) { ret = PTR_ERR(txn); goto err; } newver = obj_cow(txn, diropen); if (IS_ERR(newver)) { ret = PTR_ERR(newver); goto err_txn; } ret = dir_symlink(txn, newver, name, owner, group, mode, target, child); err_txn: ret = txn_commitabort(txn, ret); newver = NULL; /* prevent accidental use */ err: MXUNLOCK(&dir->lock); return ret; } int objstore_link(struct objstore_open_obj_info *diropen, const char *name, struct objstore_open_obj_info *tgtopen) { return -ENOTSUP; }