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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /net/ceph/cls_lock_client.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/ceph/cls_lock_client.c')
-rw-r--r--net/ceph/cls_lock_client.c431
1 files changed, 431 insertions, 0 deletions
diff --git a/net/ceph/cls_lock_client.c b/net/ceph/cls_lock_client.c
new file mode 100644
index 000000000..66136a4c1
--- /dev/null
+++ b/net/ceph/cls_lock_client.c
@@ -0,0 +1,431 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ceph/ceph_debug.h>
+
+#include <linux/types.h>
+#include <linux/slab.h>
+
+#include <linux/ceph/cls_lock_client.h>
+#include <linux/ceph/decode.h>
+#include <linux/ceph/libceph.h>
+
+/**
+ * ceph_cls_lock - grab rados lock for object
+ * @osdc: OSD client instance
+ * @oid: object to lock
+ * @oloc: object to lock
+ * @lock_name: the name of the lock
+ * @type: lock type (CEPH_CLS_LOCK_EXCLUSIVE or CEPH_CLS_LOCK_SHARED)
+ * @cookie: user-defined identifier for this instance of the lock
+ * @tag: user-defined tag
+ * @desc: user-defined lock description
+ * @flags: lock flags
+ *
+ * All operations on the same lock should use the same tag.
+ */
+int ceph_cls_lock(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ char *lock_name, u8 type, char *cookie,
+ char *tag, char *desc, u8 flags)
+{
+ int lock_op_buf_size;
+ int name_len = strlen(lock_name);
+ int cookie_len = strlen(cookie);
+ int tag_len = strlen(tag);
+ int desc_len = strlen(desc);
+ void *p, *end;
+ struct page *lock_op_page;
+ struct timespec64 mtime;
+ int ret;
+
+ lock_op_buf_size = name_len + sizeof(__le32) +
+ cookie_len + sizeof(__le32) +
+ tag_len + sizeof(__le32) +
+ desc_len + sizeof(__le32) +
+ sizeof(struct ceph_timespec) +
+ /* flag and type */
+ sizeof(u8) + sizeof(u8) +
+ CEPH_ENCODING_START_BLK_LEN;
+ if (lock_op_buf_size > PAGE_SIZE)
+ return -E2BIG;
+
+ lock_op_page = alloc_page(GFP_NOIO);
+ if (!lock_op_page)
+ return -ENOMEM;
+
+ p = page_address(lock_op_page);
+ end = p + lock_op_buf_size;
+
+ /* encode cls_lock_lock_op struct */
+ ceph_start_encoding(&p, 1, 1,
+ lock_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
+ ceph_encode_string(&p, end, lock_name, name_len);
+ ceph_encode_8(&p, type);
+ ceph_encode_string(&p, end, cookie, cookie_len);
+ ceph_encode_string(&p, end, tag, tag_len);
+ ceph_encode_string(&p, end, desc, desc_len);
+ /* only support infinite duration */
+ memset(&mtime, 0, sizeof(mtime));
+ ceph_encode_timespec64(p, &mtime);
+ p += sizeof(struct ceph_timespec);
+ ceph_encode_8(&p, flags);
+
+ dout("%s lock_name %s type %d cookie %s tag %s desc %s flags 0x%x\n",
+ __func__, lock_name, type, cookie, tag, desc, flags);
+ ret = ceph_osdc_call(osdc, oid, oloc, "lock", "lock",
+ CEPH_OSD_FLAG_WRITE, lock_op_page,
+ lock_op_buf_size, NULL, NULL);
+
+ dout("%s: status %d\n", __func__, ret);
+ __free_page(lock_op_page);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_cls_lock);
+
+/**
+ * ceph_cls_unlock - release rados lock for object
+ * @osdc: OSD client instance
+ * @oid: object to lock
+ * @oloc: object to lock
+ * @lock_name: the name of the lock
+ * @cookie: user-defined identifier for this instance of the lock
+ */
+int ceph_cls_unlock(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ char *lock_name, char *cookie)
+{
+ int unlock_op_buf_size;
+ int name_len = strlen(lock_name);
+ int cookie_len = strlen(cookie);
+ void *p, *end;
+ struct page *unlock_op_page;
+ int ret;
+
+ unlock_op_buf_size = name_len + sizeof(__le32) +
+ cookie_len + sizeof(__le32) +
+ CEPH_ENCODING_START_BLK_LEN;
+ if (unlock_op_buf_size > PAGE_SIZE)
+ return -E2BIG;
+
+ unlock_op_page = alloc_page(GFP_NOIO);
+ if (!unlock_op_page)
+ return -ENOMEM;
+
+ p = page_address(unlock_op_page);
+ end = p + unlock_op_buf_size;
+
+ /* encode cls_lock_unlock_op struct */
+ ceph_start_encoding(&p, 1, 1,
+ unlock_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
+ ceph_encode_string(&p, end, lock_name, name_len);
+ ceph_encode_string(&p, end, cookie, cookie_len);
+
+ dout("%s lock_name %s cookie %s\n", __func__, lock_name, cookie);
+ ret = ceph_osdc_call(osdc, oid, oloc, "lock", "unlock",
+ CEPH_OSD_FLAG_WRITE, unlock_op_page,
+ unlock_op_buf_size, NULL, NULL);
+
+ dout("%s: status %d\n", __func__, ret);
+ __free_page(unlock_op_page);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_cls_unlock);
+
+/**
+ * ceph_cls_break_lock - release rados lock for object for specified client
+ * @osdc: OSD client instance
+ * @oid: object to lock
+ * @oloc: object to lock
+ * @lock_name: the name of the lock
+ * @cookie: user-defined identifier for this instance of the lock
+ * @locker: current lock owner
+ */
+int ceph_cls_break_lock(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ char *lock_name, char *cookie,
+ struct ceph_entity_name *locker)
+{
+ int break_op_buf_size;
+ int name_len = strlen(lock_name);
+ int cookie_len = strlen(cookie);
+ struct page *break_op_page;
+ void *p, *end;
+ int ret;
+
+ break_op_buf_size = name_len + sizeof(__le32) +
+ cookie_len + sizeof(__le32) +
+ sizeof(u8) + sizeof(__le64) +
+ CEPH_ENCODING_START_BLK_LEN;
+ if (break_op_buf_size > PAGE_SIZE)
+ return -E2BIG;
+
+ break_op_page = alloc_page(GFP_NOIO);
+ if (!break_op_page)
+ return -ENOMEM;
+
+ p = page_address(break_op_page);
+ end = p + break_op_buf_size;
+
+ /* encode cls_lock_break_op struct */
+ ceph_start_encoding(&p, 1, 1,
+ break_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
+ ceph_encode_string(&p, end, lock_name, name_len);
+ ceph_encode_copy(&p, locker, sizeof(*locker));
+ ceph_encode_string(&p, end, cookie, cookie_len);
+
+ dout("%s lock_name %s cookie %s locker %s%llu\n", __func__, lock_name,
+ cookie, ENTITY_NAME(*locker));
+ ret = ceph_osdc_call(osdc, oid, oloc, "lock", "break_lock",
+ CEPH_OSD_FLAG_WRITE, break_op_page,
+ break_op_buf_size, NULL, NULL);
+
+ dout("%s: status %d\n", __func__, ret);
+ __free_page(break_op_page);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_cls_break_lock);
+
+int ceph_cls_set_cookie(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ char *lock_name, u8 type, char *old_cookie,
+ char *tag, char *new_cookie)
+{
+ int cookie_op_buf_size;
+ int name_len = strlen(lock_name);
+ int old_cookie_len = strlen(old_cookie);
+ int tag_len = strlen(tag);
+ int new_cookie_len = strlen(new_cookie);
+ void *p, *end;
+ struct page *cookie_op_page;
+ int ret;
+
+ cookie_op_buf_size = name_len + sizeof(__le32) +
+ old_cookie_len + sizeof(__le32) +
+ tag_len + sizeof(__le32) +
+ new_cookie_len + sizeof(__le32) +
+ sizeof(u8) + CEPH_ENCODING_START_BLK_LEN;
+ if (cookie_op_buf_size > PAGE_SIZE)
+ return -E2BIG;
+
+ cookie_op_page = alloc_page(GFP_NOIO);
+ if (!cookie_op_page)
+ return -ENOMEM;
+
+ p = page_address(cookie_op_page);
+ end = p + cookie_op_buf_size;
+
+ /* encode cls_lock_set_cookie_op struct */
+ ceph_start_encoding(&p, 1, 1,
+ cookie_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
+ ceph_encode_string(&p, end, lock_name, name_len);
+ ceph_encode_8(&p, type);
+ ceph_encode_string(&p, end, old_cookie, old_cookie_len);
+ ceph_encode_string(&p, end, tag, tag_len);
+ ceph_encode_string(&p, end, new_cookie, new_cookie_len);
+
+ dout("%s lock_name %s type %d old_cookie %s tag %s new_cookie %s\n",
+ __func__, lock_name, type, old_cookie, tag, new_cookie);
+ ret = ceph_osdc_call(osdc, oid, oloc, "lock", "set_cookie",
+ CEPH_OSD_FLAG_WRITE, cookie_op_page,
+ cookie_op_buf_size, NULL, NULL);
+
+ dout("%s: status %d\n", __func__, ret);
+ __free_page(cookie_op_page);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_cls_set_cookie);
+
+void ceph_free_lockers(struct ceph_locker *lockers, u32 num_lockers)
+{
+ int i;
+
+ for (i = 0; i < num_lockers; i++)
+ kfree(lockers[i].id.cookie);
+ kfree(lockers);
+}
+EXPORT_SYMBOL(ceph_free_lockers);
+
+static int decode_locker(void **p, void *end, struct ceph_locker *locker)
+{
+ u8 struct_v;
+ u32 len;
+ char *s;
+ int ret;
+
+ ret = ceph_start_decoding(p, end, 1, "locker_id_t", &struct_v, &len);
+ if (ret)
+ return ret;
+
+ ceph_decode_copy(p, &locker->id.name, sizeof(locker->id.name));
+ s = ceph_extract_encoded_string(p, end, NULL, GFP_NOIO);
+ if (IS_ERR(s))
+ return PTR_ERR(s);
+
+ locker->id.cookie = s;
+
+ ret = ceph_start_decoding(p, end, 1, "locker_info_t", &struct_v, &len);
+ if (ret)
+ return ret;
+
+ *p += sizeof(struct ceph_timespec); /* skip expiration */
+
+ ret = ceph_decode_entity_addr(p, end, &locker->info.addr);
+ if (ret)
+ return ret;
+
+ len = ceph_decode_32(p);
+ *p += len; /* skip description */
+
+ dout("%s %s%llu cookie %s addr %s\n", __func__,
+ ENTITY_NAME(locker->id.name), locker->id.cookie,
+ ceph_pr_addr(&locker->info.addr));
+ return 0;
+}
+
+static int decode_lockers(void **p, void *end, u8 *type, char **tag,
+ struct ceph_locker **lockers, u32 *num_lockers)
+{
+ u8 struct_v;
+ u32 struct_len;
+ char *s;
+ int i;
+ int ret;
+
+ ret = ceph_start_decoding(p, end, 1, "cls_lock_get_info_reply",
+ &struct_v, &struct_len);
+ if (ret)
+ return ret;
+
+ *num_lockers = ceph_decode_32(p);
+ *lockers = kcalloc(*num_lockers, sizeof(**lockers), GFP_NOIO);
+ if (!*lockers)
+ return -ENOMEM;
+
+ for (i = 0; i < *num_lockers; i++) {
+ ret = decode_locker(p, end, *lockers + i);
+ if (ret)
+ goto err_free_lockers;
+ }
+
+ *type = ceph_decode_8(p);
+ s = ceph_extract_encoded_string(p, end, NULL, GFP_NOIO);
+ if (IS_ERR(s)) {
+ ret = PTR_ERR(s);
+ goto err_free_lockers;
+ }
+
+ *tag = s;
+ return 0;
+
+err_free_lockers:
+ ceph_free_lockers(*lockers, *num_lockers);
+ return ret;
+}
+
+/*
+ * On success, the caller is responsible for:
+ *
+ * kfree(tag);
+ * ceph_free_lockers(lockers, num_lockers);
+ */
+int ceph_cls_lock_info(struct ceph_osd_client *osdc,
+ struct ceph_object_id *oid,
+ struct ceph_object_locator *oloc,
+ char *lock_name, u8 *type, char **tag,
+ struct ceph_locker **lockers, u32 *num_lockers)
+{
+ int get_info_op_buf_size;
+ int name_len = strlen(lock_name);
+ struct page *get_info_op_page, *reply_page;
+ size_t reply_len = PAGE_SIZE;
+ void *p, *end;
+ int ret;
+
+ get_info_op_buf_size = name_len + sizeof(__le32) +
+ CEPH_ENCODING_START_BLK_LEN;
+ if (get_info_op_buf_size > PAGE_SIZE)
+ return -E2BIG;
+
+ get_info_op_page = alloc_page(GFP_NOIO);
+ if (!get_info_op_page)
+ return -ENOMEM;
+
+ reply_page = alloc_page(GFP_NOIO);
+ if (!reply_page) {
+ __free_page(get_info_op_page);
+ return -ENOMEM;
+ }
+
+ p = page_address(get_info_op_page);
+ end = p + get_info_op_buf_size;
+
+ /* encode cls_lock_get_info_op struct */
+ ceph_start_encoding(&p, 1, 1,
+ get_info_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
+ ceph_encode_string(&p, end, lock_name, name_len);
+
+ dout("%s lock_name %s\n", __func__, lock_name);
+ ret = ceph_osdc_call(osdc, oid, oloc, "lock", "get_info",
+ CEPH_OSD_FLAG_READ, get_info_op_page,
+ get_info_op_buf_size, &reply_page, &reply_len);
+
+ dout("%s: status %d\n", __func__, ret);
+ if (ret >= 0) {
+ p = page_address(reply_page);
+ end = p + reply_len;
+
+ ret = decode_lockers(&p, end, type, tag, lockers, num_lockers);
+ }
+
+ __free_page(get_info_op_page);
+ __free_page(reply_page);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_cls_lock_info);
+
+int ceph_cls_assert_locked(struct ceph_osd_request *req, int which,
+ char *lock_name, u8 type, char *cookie, char *tag)
+{
+ int assert_op_buf_size;
+ int name_len = strlen(lock_name);
+ int cookie_len = strlen(cookie);
+ int tag_len = strlen(tag);
+ struct page **pages;
+ void *p, *end;
+ int ret;
+
+ assert_op_buf_size = name_len + sizeof(__le32) +
+ cookie_len + sizeof(__le32) +
+ tag_len + sizeof(__le32) +
+ sizeof(u8) + CEPH_ENCODING_START_BLK_LEN;
+ if (assert_op_buf_size > PAGE_SIZE)
+ return -E2BIG;
+
+ ret = osd_req_op_cls_init(req, which, "lock", "assert_locked");
+ if (ret)
+ return ret;
+
+ pages = ceph_alloc_page_vector(1, GFP_NOIO);
+ if (IS_ERR(pages))
+ return PTR_ERR(pages);
+
+ p = page_address(pages[0]);
+ end = p + assert_op_buf_size;
+
+ /* encode cls_lock_assert_op struct */
+ ceph_start_encoding(&p, 1, 1,
+ assert_op_buf_size - CEPH_ENCODING_START_BLK_LEN);
+ ceph_encode_string(&p, end, lock_name, name_len);
+ ceph_encode_8(&p, type);
+ ceph_encode_string(&p, end, cookie, cookie_len);
+ ceph_encode_string(&p, end, tag, tag_len);
+ WARN_ON(p != end);
+
+ osd_req_op_cls_request_data_pages(req, which, pages, assert_op_buf_size,
+ 0, false, true);
+ return 0;
+}
+EXPORT_SYMBOL(ceph_cls_assert_locked);