| /* |
| * vim:expandtab:shiftwidth=8:tabstop=8: |
| * |
| * Copyright CEA/DAM/DIF (2008) |
| * contributeur : Philippe DENIEL philippe.deniel@cea.fr |
| * Thomas LEIBOVICI thomas.leibovici@cea.fr |
| * |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 3 of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * --------------------------------------- |
| */ |
| |
| /** |
| * \file cache_inode_commit.c |
| * \date $Date: 2005/11/28 17:02:27 $ |
| * \version $Revision: 1.20 $ |
| * \brief Commits an IO on a REGULAR_FILE. |
| * |
| * cache_inode_commit.c : Commits an IO on a REGULAR_FILE. |
| * |
| */ |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifdef _SOLARIS |
| #include "solaris_port.h" |
| #endif /* _SOLARIS */ |
| |
| #include "fsal.h" |
| |
| #include "log.h" |
| #include "HashData.h" |
| #include "HashTable.h" |
| #include "cache_inode.h" |
| #include "nfs_core.h" |
| |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/param.h> |
| #include <time.h> |
| #include <pthread.h> |
| #include <assert.h> |
| |
| /** |
| * @brief Commits a write operation to stable storage |
| * |
| * This function commits writes from unstable to stable storage. |
| * |
| * @param[in] entry File whose data should be committed |
| * @param[in] offset Start of region to commit |
| * @param[in] count Number of bytes to commit |
| * @param[in] typeofcommit What type of commit operation this is |
| * @param[in] context FSAL credentials |
| * @param[out] status Operation status |
| * |
| * @return CACHE_INODE_SUCCESS or various errors |
| */ |
| |
| cache_inode_status_t |
| cache_inode_commit(cache_entry_t *entry, |
| uint64_t offset, |
| size_t count, |
| cache_inode_stability_t stability, |
| struct req_op_context *req_ctx, |
| cache_inode_status_t *status) |
| { |
| /* Number of bytes actually written */ |
| size_t bytes_moved = 0; |
| /* Descriptor for unstable data */ |
| cache_inode_unstable_data_t *udata = NULL; |
| /* Error return from FSAL operations*/ |
| fsal_status_t fsal_status = {0, 0}; |
| /* True if the content_lock is held */ |
| bool content_locked = false; |
| /* True if we opened our own file descriptor */ |
| bool opened = false; |
| |
| if ((uint64_t)count > ~(uint64_t)offset) |
| return NFS4ERR_INVAL; |
| |
| pthread_rwlock_rdlock(&entry->content_lock); |
| content_locked = true; |
| |
| /* Just in case the variable holds something funny when we're |
| called. */ |
| *status = CACHE_INODE_SUCCESS; |
| |
| /* If we aren't using the Ganesha write buffer, then we're using |
| the filesystem write buffer so execute a normal fsal_commit() |
| call. */ |
| if (stability == CACHE_INODE_UNSAFE_WRITE_TO_FS_BUFFER) { |
| if (!is_open_for_write(entry)) { |
| pthread_rwlock_unlock(&entry->content_lock); |
| pthread_rwlock_wrlock(&entry->content_lock); |
| if (!is_open_for_write(entry)) { |
| if (cache_inode_open(entry, |
| FSAL_O_WRITE, |
| req_ctx, |
| CACHE_INODE_FLAG_CONTENT_HAVE | |
| CACHE_INODE_FLAG_CONTENT_HOLD, |
| status) != CACHE_INODE_SUCCESS) { |
| goto out; |
| } |
| opened = true; |
| } |
| } |
| |
| fsal_status = entry->obj_handle->ops->commit(entry->obj_handle, |
| offset, |
| count); |
| if (FSAL_IS_ERROR(fsal_status)) { |
| LogMajor(COMPONENT_CACHE_INODE, |
| "cache_inode_rdwr: fsal_commit() failed: " |
| "fsal_status.major = %d", fsal_status.major); |
| |
| *status = cache_inode_error_convert(fsal_status); |
| if (fsal_status.major == ERR_FSAL_STALE) { |
| cache_inode_kill_entry(entry); |
| goto out; |
| } |
| /* Close the FD if we opened it. No need to catch an |
| additional error form a close? */ |
| if (opened) { |
| cache_inode_close(entry, |
| CACHE_INODE_FLAG_CONTENT_HAVE | |
| CACHE_INODE_FLAG_CONTENT_HOLD, |
| status); |
| opened = false; |
| } |
| goto out; |
| } |
| /* Close the FD if we opened it. */ |
| if (opened) { |
| if (cache_inode_close(entry, |
| CACHE_INODE_FLAG_CONTENT_HAVE | |
| CACHE_INODE_FLAG_CONTENT_HOLD, |
| status) != |
| CACHE_INODE_SUCCESS) { |
| LogEvent(COMPONENT_CACHE_INODE, |
| "cache_inode_commit: cache_inode_close = %d", |
| *status); |
| } |
| } |
| } else { |
| /* Ok, it looks like we're using the Ganesha write |
| * buffer. This means we will either be writing to the |
| * buffer, or writing a stable write to the file system if |
| * the buffer is already full. */ |
| udata = &entry->object.file.unstable_data; |
| if (udata->buffer == NULL) { |
| *status = CACHE_INODE_SUCCESS; |
| goto out; |
| } |
| if (count == 0 || count == 0xFFFFFFFFL) { |
| /* Count = 0 means "flush all data to permanent storage */ |
| pthread_rwlock_unlock(&entry->content_lock); |
| content_locked = false; |
| *status = cache_inode_rdwr(entry, |
| CACHE_INODE_WRITE, |
| offset, |
| udata->length, |
| &bytes_moved, |
| udata->buffer, |
| NULL, |
| req_ctx, |
| CACHE_INODE_SAFE_WRITE_TO_FS, |
| status); |
| if (status != CACHE_INODE_SUCCESS) { |
| goto out; |
| } |
| gsh_free(udata->buffer); |
| udata->buffer = NULL; |
| } else { |
| if (offset < udata->offset) { |
| *status = CACHE_INODE_INVALID_ARGUMENT; |
| goto out; |
| } |
| |
| cache_inode_rdwr(entry, |
| CACHE_INODE_WRITE, |
| offset, |
| count, |
| &bytes_moved, |
| (udata->buffer + |
| offset - udata->offset), |
| NULL, |
| req_ctx, |
| CACHE_INODE_SAFE_WRITE_TO_FS, |
| status); |
| } |
| } |
| |
| out: |
| |
| if (content_locked) { |
| pthread_rwlock_unlock(&entry->content_lock); |
| } |
| |
| return *status; |
| } |
