/**
*
* cache_inode_lookup_sw: looks up for a name in a directory indicated by a
* cached entry.
*
* Looks up for a name in a directory indicated by a cached entry. The directory
* should have been cached before.
*
* @param pentry_parent [IN] entry for the parent directory to be managed.
* @param name [IN] name of the entry that we are looking for in the
* cache.
* @param pattr [OUT] attributes for the entry that we have found.
* @param ht [IN] hash table used for the cache, unused in this
* call.
* @param pclient [INOUT] ressource allocated by the client for the nfs
* management.
* @param pcontext [IN] FSAL credentials
* @param pstatus [OUT] returned status.
* @param use_mutex [IN] if TRUE, mutex management is done, not if equal
* to FALSE.
*
* @return CACHE_INODE_SUCCESS if operation is a success \n
* @return CACHE_INODE_LRU_ERROR if allocation error occured when validating the
* entry
*
*/
cache_entry_t *cache_inode_lookup_sw(cache_entry_t * pentry_parent,
fsal_name_t * pname,
cache_inode_policy_t policy,
fsal_attrib_list_t * pattr,
hash_table_t * ht,
cache_inode_client_t * pclient,
fsal_op_context_t * pcontext,
cache_inode_status_t * pstatus,
int use_mutex)
{
cache_inode_dir_entry_t dirent_key[1], *dirent;
struct avltree_node *dirent_node;
cache_inode_dir_entry_t *new_dir_entry;
cache_entry_t *pentry = NULL;
fsal_status_t fsal_status;
#ifdef _USE_MFSL
mfsl_object_t object_handle;
#else
fsal_handle_t object_handle;
#endif
fsal_handle_t dir_handle;
fsal_attrib_list_t object_attributes;
cache_inode_create_arg_t create_arg;
cache_inode_file_type_t type;
cache_inode_status_t cache_status;
cache_inode_fsal_data_t new_entry_fsdata;
fsal_accessflags_t access_mask = 0;
memset(&create_arg, 0, sizeof(create_arg));
memset( (char *)&new_entry_fsdata, 0, sizeof( new_entry_fsdata ) ) ;
/* Set the return default to CACHE_INODE_SUCCESS */
*pstatus = CACHE_INODE_SUCCESS;
/* stats */
(pclient->stat.nb_call_total)++;
(pclient->stat.func_stats.nb_call[CACHE_INODE_LOOKUP])++;
/* We should not renew entries when !use_mutex (because unless we
* make the flag explicit (shared vs. exclusive), we don't know
* whether a mutating operation is safe--and, the caller should have
* already renewed the entry */
if(use_mutex == TRUE) {
P_w(&pentry_parent->lock);
cache_status = cache_inode_renew_entry(pentry_parent, pattr, ht,
pclient, pcontext, pstatus);
if(cache_status != CACHE_INODE_SUCCESS)
{
V_w(&pentry_parent->lock);
inc_func_err_retryable(pclient, CACHE_INODE_GETATTR);
LogDebug(COMPONENT_CACHE_INODE,
"cache_inode_lookup: returning %d(%s) from cache_inode_renew_entry",
*pstatus, cache_inode_err_str(*pstatus));
return NULL;
}
/* RW Lock goes for writer to reader */
rw_lock_downgrade(&pentry_parent->lock);
}
if(pentry_parent->internal_md.type != DIRECTORY)
{
/* Parent is no directory base, return NULL */
*pstatus = CACHE_INODE_NOT_A_DIRECTORY;
/* stats */
(pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_LOOKUP])++;
if(use_mutex == TRUE)
V_r(&pentry_parent->lock);
return NULL;
}
/* if name is ".", use the input value */
if(!FSAL_namecmp(pname, (fsal_name_t *) & FSAL_DOT))
{
pentry = pentry_parent;
}
else if(!FSAL_namecmp(pname, (fsal_name_t *) & FSAL_DOT_DOT))
{
/* Directory do only have exactly one parent. This a limitation in all FS,
* which implies that hard link are forbidden on directories (so that
* they exists only in one dir). Because of this, the parent list is
* always limited to one element for a dir. Clients SHOULD never
* 'lookup( .. )' in something that is no dir. */
pentry =
cache_inode_lookupp_no_mutex(pentry_parent, ht, pclient, pcontext,
pstatus);
}
else
{
/* This is a "regular lookup" (not on "." or "..") */
/* Check is user (as specified by the credentials) is authorized to
* lookup the directory or not */
access_mask = FSAL_MODE_MASK_SET(FSAL_X_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_LIST_DIR);
if(cache_inode_access_no_mutex(pentry_parent,
access_mask,
ht,
pclient,
pcontext,
pstatus) != CACHE_INODE_SUCCESS)
{
if(use_mutex == TRUE)
V_r(&pentry_parent->lock);
(pclient->stat.func_stats.nb_err_retryable[CACHE_INODE_GETATTR])++;
return NULL;
}
/* We first try avltree_lookup by name. If that fails, we dispatch to
* the fsal. */
FSAL_namecpy(&dirent_key->name, pname);
dirent_node = avltree_lookup(&dirent_key->node_n,
&pentry_parent->object.dir.dentries);
if (dirent_node) {
dirent = avltree_container_of(dirent_node, cache_inode_dir_entry_t,
node_n);
pentry = dirent->pentry;
}
if(pentry == NULL)
{
LogDebug(COMPONENT_CACHE_INODE, "Cache Miss detected");
dir_handle = pentry_parent->handle;
object_attributes.asked_attributes = pclient->attrmask;
#ifdef _USE_MFSL
#ifdef _USE_MFSL_ASYNC
if(!mfsl_async_is_object_asynchronous(&pentry_parent->mobject))
{
/* If the parent is asynchronous, rely on the content of the cache
* inode parent entry.
*
* /!\ If the fs behind the FSAL is touched in a non-nfs way,
* there will be huge incoherencies.
*/
#endif /* _USE_MFSL_ASYNC */
fsal_status = MFSL_lookup(&pentry_parent->mobject,
pname,
pcontext,
&pclient->mfsl_context,
&object_handle, &object_attributes, NULL);
#ifdef _USE_MFSL_ASYNC
}
else
{
LogMidDebug(COMPONENT_CACHE_INODE,
"cache_inode_lookup chose to bypass FSAL and trusted his cache for name=%s",
pname->name);
fsal_status.major = ERR_FSAL_NOENT;
fsal_status.minor = ENOENT;
}
#endif /* _USE_MFSL_ASYNC */
#else
fsal_status =
FSAL_lookup(&dir_handle, pname, pcontext, &object_handle,
&object_attributes);
#endif /* _USE_MFSL */
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
if(use_mutex == TRUE)
V_r(&pentry_parent->lock);
/* Stale File Handle to be detected and managed */
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_lookup: Stale FSAL File Handle detected for pentry = %p, fsal_status=(%u,%u)",
pentry_parent, fsal_status.major, fsal_status.minor);
if(cache_inode_kill_entry(pentry_parent, NO_LOCK, ht, pclient, &kill_status) !=
CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE,
"cache_inode_pentry_parent: Could not kill entry %p, status = %u",
pentry_parent, kill_status);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
/* stats */
(pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_LOOKUP])++;
return NULL;
}
type = cache_inode_fsal_type_convert(object_attributes.type);
/* If entry is a symlink, this value for be cached */
if(type == SYMBOLIC_LINK)
{
if( CACHE_INODE_KEEP_CONTENT( policy ) )
#ifdef _USE_MFSL
{
fsal_status =
MFSL_readlink(&object_handle, pcontext, &pclient->mfsl_context,
&create_arg.link_content, &object_attributes, NULL);
}
#else
{
fsal_status =
FSAL_readlink(&object_handle, pcontext, &create_arg.link_content,
&object_attributes);
}
else
{
fsal_status.major = ERR_FSAL_NO_ERROR ;
fsal_status.minor = 0 ;
}
#endif
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
if(use_mutex == TRUE)
V_r(&pentry_parent->lock);
/* Stale File Handle to be detected and managed */
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_lookup: Stale FSAL File Handle detected for pentry = %p, fsal_status=(%u,%u)",
pentry_parent, fsal_status.major, fsal_status.minor);
if(cache_inode_kill_entry(pentry_parent, NO_LOCK, ht, pclient, &kill_status)
!= CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE,
"cache_inode_pentry_parent: Could not kill entry %p, status = %u",
pentry_parent, kill_status);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
/* stats */
(pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_LOOKUP])++;
return NULL;
}
}
/* Allocation of a new entry in the cache */
#ifdef _USE_MFSL
new_entry_fsdata.handle = object_handle.handle;
#else
new_entry_fsdata.handle = object_handle;
#endif
new_entry_fsdata.cookie = 0;
if((pentry = cache_inode_new_entry( &new_entry_fsdata,
&object_attributes,
type,
policy,
&create_arg,
NULL,
ht,
pclient,
pcontext,
FALSE, /* This is a population and not a creation */
pstatus ) ) == NULL )
{
if(use_mutex == TRUE)
V_r(&pentry_parent->lock);
/* stats */
(pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_LOOKUP])++;
return NULL;
}
/* Entry was found in the FSAL, add this entry to the parent
* directory */
cache_status = cache_inode_add_cached_dirent(pentry_parent,
pname,
pentry,
ht,
&new_dir_entry,
pclient,
pcontext,
pstatus);
if(cache_status != CACHE_INODE_SUCCESS
&& cache_status != CACHE_INODE_ENTRY_EXISTS)
{
if(use_mutex == TRUE)
V_r(&pentry_parent->lock);
/* stats */
(pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_LOOKUP])++;
return NULL;
}
} /* cached lookup fail (try fsal) */
/**
*
* cache_inode_create: creates an entry through the cache.
*
* Creates an entry through the cache.
*
* @param pentry_parent [IN] pointer to the pentry parent
* @param pname [IN] pointer to the name of the object in the destination directory.
* @param type [IN] type of the object to be created.
* @param mode [IN] mode to be used at file creation
* @param pcreate_arg [IN] additional argument for object creation
* @param pattr [OUT] attributes for the new object.
* @param ht [INOUT] hash table used for the cache.
* @param pclient [INOUT] ressource allocated by the client for the nfs management.
* @param pcontext [IN] FSAL credentials
* @param pstatus [OUT] returned status.
*
* @return CACHE_INODE_SUCCESS if operation is a success \n
* @return CACHE_INODE_LRU_ERROR if allocation error occured when validating the entry\n
* @return CACHE_INODE_BAD_TYPE either source or destination have incorrect type\n
* @return CACHE_INODE_ENTRY_EXISTS entry of that name already exists in destination.
*
*/
cache_entry_t *
cache_inode_create(cache_entry_t * pentry_parent,
fsal_name_t * pname,
cache_inode_file_type_t type,
fsal_accessmode_t mode,
cache_inode_create_arg_t * pcreate_arg,
fsal_attrib_list_t * pattr,
hash_table_t * ht,
cache_inode_client_t * pclient,
fsal_op_context_t * pcontext,
cache_inode_status_t * pstatus)
{
cache_entry_t *pentry = NULL;
fsal_status_t fsal_status;
#ifdef _USE_MFSL
mfsl_object_t object_handle;
#else
fsal_handle_t object_handle;
#endif
fsal_attrib_list_t parent_attributes;
fsal_attrib_list_t object_attributes;
fsal_handle_t dir_handle;
cache_inode_fsal_data_t fsal_data;
cache_inode_status_t status;
struct cache_inode_dir_begin__ *dir_begin;
int pnfs_status;
/* Set the return default to CACHE_INODE_SUCCESS */
*pstatus = CACHE_INODE_SUCCESS;
/* stats */
pclient->stat.nb_call_total += 1;
inc_func_call(pclient, CACHE_INODE_CREATE);
/*
* Check if the required type is correct, with this
* function, we manage file, dir and symlink
*/
if(type != REGULAR_FILE && type != DIR_BEGINNING && type != SYMBOLIC_LINK &&
type != SOCKET_FILE && type != FIFO_FILE && type != CHARACTER_FILE &&
type != BLOCK_FILE)
{
*pstatus = CACHE_INODE_BAD_TYPE;
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
return NULL;
}
/*
* Check if caller is allowed to perform the operation
*/
status = cache_inode_access(pentry_parent,
FSAL_W_OK, ht,
pclient, pcontext, &status);
if (status != CACHE_INODE_SUCCESS)
{
*pstatus = status;
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
/* pentry is a directory */
return NULL;
}
/*
* Check if an entry of the same name exists
*/
pentry = cache_inode_lookup(pentry_parent,
pname, &object_attributes,
ht, pclient, pcontext, pstatus);
if (pentry != NULL)
{
*pstatus = CACHE_INODE_ENTRY_EXISTS;
if(pentry->internal_md.type != type)
{
/*
* Incompatible types, returns NULL
*/
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
return NULL;
}
else
{
/* stats */
inc_func_success(pclient, CACHE_INODE_CREATE);
/*
* redondant creation, returned the
* previously created entry
*/
return pentry;
}
}
/*
* At this point, the entry was not found, this means
* that is doesn't exist is FSAL, we can create it
*/
/* Get the lock for the parent */
P_w(&pentry_parent->lock);
if(pentry_parent->internal_md.type == DIR_BEGINNING)
dir_handle = pentry_parent->object.dir_begin.handle;
if(pentry_parent->internal_md.type == DIR_CONTINUE)
{
P_r(&pentry_parent->object.dir_cont.pdir_begin->lock);
dir_handle = pentry_parent->object.dir_cont.pdir_begin->object.dir_begin.handle;
V_r(&pentry_parent->object.dir_cont.pdir_begin->lock);
}
object_attributes.asked_attributes = pclient->attrmask;
switch (type)
{
case REGULAR_FILE:
#ifdef _USE_MFSL
cache_inode_get_attributes(pentry_parent, &parent_attributes);
fsal_status = MFSL_create(&pentry_parent->mobject,
pname, pcontext,
&pclient->mfsl_context,
mode, &object_handle,
&object_attributes, &parent_attributes);
#else
fsal_status = FSAL_create(&dir_handle,
pname, pcontext, mode,
&object_handle, &object_attributes);
#endif
break;
case DIR_BEGINNING:
#ifdef _USE_MFSL
cache_inode_get_attributes(pentry_parent, &parent_attributes);
fsal_status = MFSL_mkdir(&pentry_parent->mobject,
pname, pcontext,
&pclient->mfsl_context,
mode, &object_handle,
&object_attributes, &parent_attributes);
#else
fsal_status = FSAL_mkdir(&dir_handle,
pname, pcontext, mode,
&object_handle, &object_attributes);
#endif
break;
case SYMBOLIC_LINK:
#ifdef _USE_MFSL
cache_inode_get_attributes(pentry_parent, &object_attributes);
fsal_status = MFSL_symlink(&pentry_parent->mobject,
pname, &pcreate_arg->link_content,
pcontext, &pclient->mfsl_context,
mode, &object_handle, &object_attributes);
#else
fsal_status = FSAL_symlink(&dir_handle,
pname, &pcreate_arg->link_content,
pcontext, mode, &object_handle,
&object_attributes);
#endif
break;
case SOCKET_FILE:
#ifdef _USE_MFSL
fsal_status = MFSL_mknode(&pentry_parent->mobject, pname,
pcontext, &pclient->mfsl_context, mode,
FSAL_TYPE_SOCK, NULL, /* no dev_t needed for socket file */
&object_handle, &object_attributes);
#else
fsal_status = FSAL_mknode(&dir_handle, pname, pcontext,
mode, FSAL_TYPE_SOCK, NULL, /* no dev_t needed for socket file */
&object_handle, &object_attributes);
#endif
break;
case FIFO_FILE:
#ifdef _USE_MFSL
fsal_status = MFSL_mknode(&pentry_parent->mobject, pname,
pcontext, &pclient->mfsl_context,
mode, FSAL_TYPE_FIFO, NULL, /* no dev_t needed for FIFO file */
&object_handle, &object_attributes);
#else
fsal_status = FSAL_mknode(&dir_handle, pname, pcontext,
mode, FSAL_TYPE_FIFO, NULL, /* no dev_t needed for FIFO file */
&object_handle, &object_attributes);
#endif
break;
case BLOCK_FILE:
#ifdef _USE_MFSL
fsal_status = MFSL_mknode(&pentry_parent->mobject,
pname, pcontext,
&pclient->mfsl_context,
mode, FSAL_TYPE_BLK,
&pcreate_arg->dev_spec,
&object_handle, &object_attributes);
#else
fsal_status = FSAL_mknode(&dir_handle,
pname, pcontext,
mode, FSAL_TYPE_BLK,
&pcreate_arg->dev_spec,
&object_handle, &object_attributes);
#endif
break;
case CHARACTER_FILE:
#ifdef _USE_MFSL
fsal_status = MFSL_mknode(&pentry_parent->mobject,
pname, pcontext,
&pclient->mfsl_context,
mode, FSAL_TYPE_CHR,
&pcreate_arg->dev_spec,
&object_handle, &object_attributes);
#else
fsal_status = FSAL_mknode(&dir_handle,
pname, pcontext,
mode, FSAL_TYPE_CHR,
&pcreate_arg->dev_spec,
&object_handle, &object_attributes);
#endif
break;
default:
/* we should never go there */
*pstatus = CACHE_INODE_INCONSISTENT_ENTRY;
V_w(&pentry_parent->lock);
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
return NULL;
break;
}
/* Check for the result */
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
V_w(&pentry_parent->lock);
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_create: Stale FSAL File Handle "
"detected for pentry = %p",
pentry_parent);
cache_inode_kill_entry(pentry_parent, ht,
pclient, &kill_status);
if(kill_status != CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE, "cache_inode_create: "
"Could not kill entry %p, status = %u",
pentry_parent, kill_status);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
return NULL;
}
else
{
#ifdef _USE_MFSL
fsal_data.handle = object_handle.handle;
#else
fsal_data.handle = object_handle;
#endif
fsal_data.cookie = DIR_START;
pentry = cache_inode_new_entry(&fsal_data, &object_attributes,
type, pcreate_arg, NULL,
ht, pclient, pcontext,
TRUE, /* This is a creation and not a population */
pstatus);
if (pentry == NULL)
{
*pstatus = CACHE_INODE_INSERT_ERROR;
V_w(&pentry_parent->lock);
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
return NULL;
}
#ifdef _USE_MFSL
/* Copy the MFSL object to the cache */
memcpy((char *)&(pentry->mobject),
(char *)&object_handle, sizeof(mfsl_object_t));
#endif
/* Add this entry to the directory */
status = cache_inode_add_cached_dirent(pentry_parent,
pname, pentry,
NULL, ht,
pclient, pcontext,
pstatus);
if (status != CACHE_INODE_SUCCESS)
{
V_w(&pentry_parent->lock);
/* stats */
inc_func_err_unrecover(pclient, CACHE_INODE_CREATE);
return NULL;
}
}
#ifdef _USE_PNFS
if((type == REGULAR_FILE) &&
(pcreate_arg != NULL) &&
(pcreate_arg->use_pnfs == TRUE))
{
pnfs_status = pnfs_create_ds_file(&pclient->pnfsclient,
pentry->object.file.attributes.fileid,
&pentry->object.file.pnfs_file.ds_file);
if (pnfs_status != NFS4_OK)
{
V_w(&pentry_parent->lock);
LogDebug(COMPONENT_CACHE_INODE, "OPEN PNFS CREATE DS FILE : Error %u",
pnfs_status);
*pstatus = CACHE_INODE_IO_ERROR;
return NULL;
}
}
#endif
/* Update the parent cached attributes */
if(pentry_parent->internal_md.type == DIR_BEGINNING)
dir_begin = &pentry_parent->object.dir_begin;
else
dir_begin = &pentry_parent->object.dir_cont.pdir_begin->object.dir_begin;
dir_begin->attributes.mtime.seconds = time(NULL);
dir_begin->attributes.mtime.nseconds = 0;
dir_begin->attributes.ctime = dir_begin->attributes.mtime;
/*
* if the created object is a directory, it contains a link
* to its parent : '..'. Thus the numlink attr must be increased.
*/
if(type == DIR_BEGINNING)
{
dir_begin->attributes.numlinks++;
}
/* Get the attributes in return */
*pattr = object_attributes;
/* valid the parent */
*pstatus = cache_inode_valid(pentry_parent,
CACHE_INODE_OP_SET,
pclient);
/* release the lock for the parent */
V_w(&pentry_parent->lock);
/* stat */
if(*pstatus != CACHE_INODE_SUCCESS)
inc_func_err_retryable(pclient, CACHE_INODE_CREATE);
else
inc_func_success(pclient, CACHE_INODE_CREATE);
return pentry;
}
/**
*
* cache_inode_readdir_populate: fully reads a directory in FSAL and caches
* the related entries.
*
* fully reads a directory in FSAL and caches the related entries. No MT
* safety managed here !!
*
* @param pentry [IN] entry for the parent directory to be read. This must be
* a DIRECTORY
* @param ht [IN] hash table used for the cache, unused in this call.
* @param pclient [INOUT] ressource allocated by the client for the nfs
* management.
* @param pcontext [IN] FSAL credentials
* @param pstatus [OUT] returned status.
*
*/
cache_inode_status_t cache_inode_readdir_populate(
cache_entry_t * pentry_dir,
cache_inode_policy_t policy,
hash_table_t * ht,
cache_inode_client_t * pclient,
fsal_op_context_t * pcontext,
cache_inode_status_t * pstatus)
{
fsal_dir_t fsal_dirhandle;
fsal_status_t fsal_status;
fsal_attrib_list_t dir_attributes;
fsal_cookie_t begin_cookie;
fsal_cookie_t end_cookie;
fsal_count_t nbfound;
fsal_count_t iter;
fsal_boolean_t fsal_eod;
cache_entry_t *pentry = NULL;
cache_entry_t *pentry_parent = pentry_dir;
fsal_attrib_list_t object_attributes;
cache_inode_create_arg_t create_arg;
cache_inode_file_type_t type;
cache_inode_status_t cache_status;
fsal_dirent_t array_dirent[FSAL_READDIR_SIZE + 20];
cache_inode_fsal_data_t new_entry_fsdata;
cache_inode_dir_entry_t *new_dir_entry = NULL;
uint64_t i = 0;
/* Set the return default to CACHE_INODE_SUCCESS */
*pstatus = CACHE_INODE_SUCCESS;
/* Only DIRECTORY entries are concerned */
if(pentry_dir->internal_md.type != DIRECTORY)
{
*pstatus = CACHE_INODE_BAD_TYPE;
return *pstatus;
}
#ifdef _USE_MFSL_ASYNC
/* If entry is asynchronous (via MFSL), it should not be repopulated until
it is synced */
if(MFSL_ASYNC_is_synced(&pentry_dir->mobject) == FALSE)
{
/* Directory is asynchronous, do not repopulate it and let it
* in the state 'has_been_readdir == FALSE' */
*pstatus = CACHE_INODE_SUCCESS;
return *pstatus;
}
#endif
/* If directory is already populated , there is no job to do */
if(pentry_dir->object.dir.has_been_readdir == CACHE_INODE_YES)
{
*pstatus = CACHE_INODE_SUCCESS;
return *pstatus;
}
/* Invalidate all the dirents */
if(cache_inode_invalidate_all_cached_dirent(pentry_dir,
ht,
pclient,
pstatus) != CACHE_INODE_SUCCESS)
return *pstatus;
/* Open the directory */
dir_attributes.asked_attributes = pclient->attrmask;
#ifdef _USE_MFSL
fsal_status = MFSL_opendir(&pentry_dir->mobject,
pcontext,
&pclient->mfsl_context, &fsal_dirhandle, &dir_attributes, NULL);
#else
fsal_status = FSAL_opendir(&pentry_dir->object.dir.handle,
pcontext, &fsal_dirhandle, &dir_attributes);
#endif
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_readdir: Stale FSAL File Handle detected for pentry = %p, fsal_status=(%u,%u)",
pentry_dir, fsal_status.major, fsal_status.minor);
if(cache_inode_kill_entry(pentry_dir, WT_LOCK, ht, pclient, &kill_status) !=
CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE,
"cache_inode_readdir: Could not kill entry %p, status = %u",
pentry_dir, kill_status);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
return *pstatus;
}
/* Loop for readding the directory */
FSAL_SET_COOKIE_BEGINNING(begin_cookie);
FSAL_SET_COOKIE_BEGINNING(end_cookie);
fsal_eod = FALSE;
do
{
#ifdef _USE_MFSL
fsal_status = MFSL_readdir(&fsal_dirhandle,
begin_cookie,
pclient->attrmask,
FSAL_READDIR_SIZE * sizeof(fsal_dirent_t),
array_dirent,
&end_cookie,
&nbfound, &fsal_eod, &pclient->mfsl_context, NULL);
#else
fsal_status = FSAL_readdir(&fsal_dirhandle,
begin_cookie,
pclient->attrmask,
FSAL_READDIR_SIZE * sizeof(fsal_dirent_t),
array_dirent, &end_cookie, &nbfound, &fsal_eod);
#endif
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
return *pstatus;
}
for(iter = 0; iter < nbfound; iter++)
{
LogFullDebug(COMPONENT_NFS_READDIR,
"cache readdir populate found entry %s",
array_dirent[iter].name.name);
/* It is not needed to cache '.' and '..' */
if(!FSAL_namecmp(&(array_dirent[iter].name), (fsal_name_t *) & FSAL_DOT) ||
!FSAL_namecmp(&(array_dirent[iter].name), (fsal_name_t *) & FSAL_DOT_DOT))
{
LogFullDebug(COMPONENT_NFS_READDIR,
"cache readdir populate : do not cache . and ..");
continue;
}
/* If dir entry is a symbolic link, its content has to be read */
if((type =
cache_inode_fsal_type_convert(array_dirent[iter].attributes.type)) ==
SYMBOLIC_LINK)
{
#ifdef _USE_MFSL
mfsl_object_t tmp_mfsl;
#endif
/* Let's read the link for caching its value */
object_attributes.asked_attributes = pclient->attrmask;
if( CACHE_INODE_KEEP_CONTENT( pentry_dir->policy ) )
{
#ifdef _USE_MFSL
tmp_mfsl.handle = array_dirent[iter].handle;
fsal_status = MFSL_readlink(&tmp_mfsl,
pcontext,
&pclient->mfsl_context,
&create_arg.link_content, &object_attributes, NULL);
#else
fsal_status = FSAL_readlink(&array_dirent[iter].handle,
pcontext,
&create_arg.link_content, &object_attributes);
#endif
}
else
{
fsal_status.major = ERR_FSAL_NO_ERROR ;
fsal_status.minor = 0 ;
}
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_readdir: Stale FSAL File Handle detected for pentry = %p, fsal_status=(%u,%u)",
pentry_dir, fsal_status.major, fsal_status.minor );
if(cache_inode_kill_entry(pentry_dir, WT_LOCK, ht, pclient, &kill_status) !=
CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE,
"cache_inode_readdir: Could not kill entry %p, status = %u",
pentry_dir, kill_status);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
return *pstatus;
}
}
/* Try adding the entry, if it exists then this existing entry is
returned */
new_entry_fsdata.handle = array_dirent[iter].handle;
new_entry_fsdata.cookie = 0; /* XXX needed? */
if((pentry = cache_inode_new_entry( &new_entry_fsdata,
&array_dirent[iter].attributes,
type,
policy,
&create_arg,
NULL,
ht,
pclient,
pcontext,
FALSE, /* This is population and no creation */
pstatus)) == NULL)
return *pstatus;
cache_status = cache_inode_add_cached_dirent(
pentry_parent,
&(array_dirent[iter].name),
pentry,
ht,
&new_dir_entry,
pclient,
pcontext,
pstatus);
if(cache_status != CACHE_INODE_SUCCESS
&& cache_status != CACHE_INODE_ENTRY_EXISTS)
return *pstatus;
/*
* Remember the FSAL readdir cookie associated with this dirent. This
* is needed for partial directory reads.
*
* to_uint64 should be a lightweight operation--it is in the current
* default implementation. We think the right thing -should- happen
* therefore with if _USE_MFSL.
*
* I'm ignoring the status because the default operation is a memcmp--
* we lready -have- the cookie. */
if (cache_status != CACHE_INODE_ENTRY_EXISTS) {
(void) FSAL_cookie_to_uint64(&array_dirent[iter].handle,
pcontext, &array_dirent[iter].cookie,
&new_dir_entry->fsal_cookie);
/* we are filling in all entries, and the cookie avl was
* cleared before adding dirents */
new_dir_entry->cookie = i; /* still an offset */
(void) avltree_insert(&new_dir_entry->node_c,
&pentry_parent->object.dir.cookies);
} /* !exist */
} /* iter */
/* Get prepared for next step */
begin_cookie = end_cookie;
/* next offset */
i++;
}
while(fsal_eod != TRUE);
/* Close the directory */
#ifdef _USE_MFSL
fsal_status = MFSL_closedir(&fsal_dirhandle, &pclient->mfsl_context, NULL);
#else
fsal_status = FSAL_closedir(&fsal_dirhandle);
#endif
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
return *pstatus;
}
/* End of work */
pentry_dir->object.dir.has_been_readdir = CACHE_INODE_YES;
*pstatus = CACHE_INODE_SUCCESS;
return *pstatus;
} /* cache_inode_readdir_populate */
cache_entry_t *
cache_inode_create(cache_entry_t *parent,
fsal_name_t *name,
cache_inode_file_type_t type,
fsal_accessmode_t mode,
cache_inode_create_arg_t *create_arg,
fsal_attrib_list_t *attr,
fsal_op_context_t *context,
cache_inode_status_t *status)
{
cache_entry_t *entry = NULL;
fsal_status_t fsal_status = {0, 0};
fsal_handle_t object_handle;
fsal_attrib_list_t object_attributes;
cache_inode_fsal_data_t fsal_data;
cache_inode_create_arg_t zero_create_arg;
memset(&zero_create_arg, 0, sizeof(zero_create_arg));
memset(&fsal_data, 0, sizeof(fsal_data));
memset(&object_handle, 0, sizeof(object_handle));
if (create_arg == NULL) {
create_arg = &zero_create_arg;
}
/* Set the return default to CACHE_INODE_SUCCESS */
*status = CACHE_INODE_SUCCESS;
if ((type != REGULAR_FILE) && (type != DIRECTORY) &&
(type != SYMBOLIC_LINK) && (type != SOCKET_FILE) &&
(type != FIFO_FILE) && (type != CHARACTER_FILE) &&
(type != BLOCK_FILE)) {
*status = CACHE_INODE_BAD_TYPE;
entry = NULL;
goto out;
}
/* Check if an entry of the same name exists */
entry = cache_inode_lookup(parent,
name,
attr,
context,
status);
if (entry != NULL) {
*status = CACHE_INODE_ENTRY_EXISTS;
if (entry->type != type) {
/* Incompatible types, returns NULL */
cache_inode_lru_unref(entry, LRU_FLAG_NONE);
entry = NULL;
goto out;
} else {
goto out;
}
}
/* The entry doesn't exist, so we can create it. */
object_attributes.asked_attributes = cache_inode_params.attrmask;
switch (type) {
case REGULAR_FILE:
fsal_status = FSAL_create(&parent->handle,
name, context, mode,
&object_handle, &object_attributes);
break;
case DIRECTORY:
fsal_status = FSAL_mkdir(&parent->handle,
name, context, mode,
&object_handle, &object_attributes);
break;
case SYMBOLIC_LINK:
fsal_status = FSAL_symlink(&parent->handle,
name, &create_arg->link_content,
context, mode, &object_handle,
&object_attributes);
break;
case SOCKET_FILE:
fsal_status = FSAL_mknode(&parent->handle, name, context,
mode, FSAL_TYPE_SOCK, NULL,
&object_handle, &object_attributes);
break;
case FIFO_FILE:
fsal_status = FSAL_mknode(&parent->handle, name, context,
mode, FSAL_TYPE_FIFO, NULL,
&object_handle, &object_attributes);
break;
case BLOCK_FILE:
fsal_status = FSAL_mknode(&parent->handle,
name, context,
mode, FSAL_TYPE_BLK,
&create_arg->dev_spec,
&object_handle, &object_attributes);
break;
case CHARACTER_FILE:
fsal_status = FSAL_mknode(&parent->handle,
name, context,
mode, FSAL_TYPE_CHR,
&create_arg->dev_spec,
&object_handle,
&object_attributes);
break;
default:
/* we should never go there */
*status = CACHE_INODE_INCONSISTENT_ENTRY;
entry = NULL;
goto out;
break;
}
/* Check for the result */
if (FSAL_IS_ERROR(fsal_status)) {
if (fsal_status.major == ERR_FSAL_STALE) {
LogEvent(COMPONENT_CACHE_INODE,
"FSAL returned STALE on create type %d",
type);
cache_inode_kill_entry(parent);
}
*status = cache_inode_error_convert(fsal_status);
entry = NULL;
goto out;
}
fsal_data.fh_desc.start = (caddr_t) &object_handle;
fsal_data.fh_desc.len = 0;
FSAL_ExpandHandle(context->export_context,
FSAL_DIGEST_SIZEOF,
&fsal_data.fh_desc);
entry = cache_inode_new_entry(&fsal_data,
&object_attributes,
type,
create_arg,
status);
if (entry == NULL) {
*status = CACHE_INODE_INSERT_ERROR;
return NULL;
}
PTHREAD_RWLOCK_WRLOCK(&parent->content_lock);
/* Add this entry to the directory (also takes an internal ref) */
cache_inode_add_cached_dirent(parent,
name, entry,
NULL,
status);
PTHREAD_RWLOCK_UNLOCK(&parent->content_lock);
if (*status != CACHE_INODE_SUCCESS) {
cache_inode_lru_unref(entry, LRU_FLAG_NONE);
entry = NULL;
goto out;
}
PTHREAD_RWLOCK_WRLOCK(&parent->attr_lock);
/* Update the parent cached attributes */
cache_inode_set_time_current(&parent->attributes.mtime);
parent->attributes.ctime = parent->attributes.mtime;
/* if the created object is a directory, it contains a link
to its parent : '..'. Thus the numlink attr must be increased. */
if (type == DIRECTORY) {
++(parent->attributes.numlinks);
}
PTHREAD_RWLOCK_UNLOCK(&parent->attr_lock);
/* Copy up the child attributes */
*attr = object_attributes;
*status = CACHE_INODE_SUCCESS;
out:
return entry;
}
/**
*
* cache_inode_get: Gets an entry by using its fsdata as a key and caches it if needed.
*
* Gets an entry by using its fsdata as a key and caches it if needed.
* ASSUMPTION: DIR_CONT entries are always garbabbaged before their related DIR_BEGINNG
*
* @param fsdata [IN] file system data
* @param pattr [OUT] pointer to the attributes for the result.
* @param ht [IN] hash table used for the cache, unused in this call.
* @param pclient [INOUT] ressource allocated by the client for the nfs management.
* @param pcontext [IN] FSAL credentials
* @param pstatus [OUT] returned status.
*
* @return the pointer to the entry is successfull, NULL otherwise.
*
*/
cache_entry_t *cache_inode_get(cache_inode_fsal_data_t * pfsdata,
fsal_attrib_list_t * pattr,
hash_table_t * ht,
cache_inode_client_t * pclient,
fsal_op_context_t * pcontext,
cache_inode_status_t * pstatus)
{
hash_buffer_t key, value;
cache_entry_t *pentry = NULL;
fsal_status_t fsal_status;
cache_inode_create_arg_t create_arg;
cache_inode_file_type_t type;
int hrc = 0;
fsal_attrib_list_t fsal_attributes;
cache_inode_fsal_data_t *ppoolfsdata = NULL;
/* Set the return default to CACHE_INODE_SUCCESS */
*pstatus = CACHE_INODE_SUCCESS;
/* stats */
pclient->stat.nb_call_total += 1;
pclient->stat.func_stats.nb_call[CACHE_INODE_GET] += 1;
/* Turn the input to a hash key */
if(cache_inode_fsaldata_2_key(&key, pfsdata, pclient))
{
*pstatus = CACHE_INODE_UNAPPROPRIATED_KEY;
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
ppoolfsdata = (cache_inode_fsal_data_t *) key.pdata;
RELEASE_PREALLOC(ppoolfsdata, pclient->pool_key, next_alloc);
return NULL;
}
switch (hrc = HashTable_Get(ht, &key, &value))
{
case HASHTABLE_SUCCESS:
/* Entry exists in the cache and was found */
pentry = (cache_entry_t *) value.pdata;
/* return attributes additionally */
cache_inode_get_attributes(pentry, pattr);
break;
case HASHTABLE_ERROR_NO_SUCH_KEY:
/* Cache miss, allocate a new entry */
/* If we ask for a dir cont (in this case pfsdata.cookie != FSAL_DIR_BEGINNING, we have
* a client who performs a readdir in the middle of a directory, when the direcctories
* have been garbbage. we must search for the DIR_BEGIN related to this DIR_CONT */
if(pfsdata->cookie != DIR_START)
{
/* added for sanity check */
LogDebug(COMPONENT_CACHE_INODE_GC,
"=======> Pb cache_inode_get: line %u pfsdata->cookie != DIR_START (=%u) on object whose type is %u",
__LINE__, pfsdata->cookie,
cache_inode_fsal_type_convert(fsal_attributes.type));
pfsdata->cookie = DIR_START;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
/* redo the call */
return cache_inode_get(pfsdata, pattr, ht, pclient, pcontext, pstatus);
}
/* First, call FSAL to know what the object is */
fsal_attributes.asked_attributes = pclient->attrmask;
fsal_status = FSAL_getattrs(&pfsdata->handle, pcontext, &fsal_attributes);
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
LogDebug(COMPONENT_CACHE_INODE_GC, "cache_inode_get: line %u cache_inode_status=%u fsal_status=%u,%u ",
__LINE__, *pstatus, fsal_status.major, fsal_status.minor);
if(fsal_status.major == ERR_FSAL_STALE)
{
char handle_str[256];
snprintHandle(handle_str, 256, &pfsdata->handle);
LogEvent(COMPONENT_CACHE_INODE_GC,"cache_inode_get: Stale FSAL File Handle %s", handle_str);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
}
/* The type has to be set in the attributes */
if(!FSAL_TEST_MASK(fsal_attributes.supported_attributes, FSAL_ATTR_TYPE))
{
*pstatus = CACHE_INODE_FSAL_ERROR;
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
}
/* Get the cache_inode file type */
type = cache_inode_fsal_type_convert(fsal_attributes.type);
if(type == SYMBOLIC_LINK)
{
FSAL_CLEAR_MASK(fsal_attributes.asked_attributes);
FSAL_SET_MASK(fsal_attributes.asked_attributes, pclient->attrmask);
fsal_status =
FSAL_readlink(&pfsdata->handle, pcontext, &create_arg.link_content,
&fsal_attributes);
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogDebug(COMPONENT_CACHE_INODE_GC,
"cache_inode_get: Stale FSAL File Handle detected for pentry = %p",
pentry);
if(cache_inode_kill_entry(pentry, ht, pclient, &kill_status) !=
CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE_GC,"cache_inode_get: Could not kill entry %p, status = %u",
pentry, kill_status);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
return NULL;
}
}
/* Add the entry to the cache */
if((pentry = cache_inode_new_entry(pfsdata, &fsal_attributes, type, &create_arg, NULL, /* never used to add a new DIR_CONTINUE within the scope of this function */
ht, pclient, pcontext, FALSE, /* This is a population, not a creation */
pstatus)) == NULL)
{
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
}
/* Set the returned attributes */
*pattr = fsal_attributes;
/* Now, exit the switch/case and returns */
break;
default:
/* This should not happened */
*pstatus = CACHE_INODE_INVALID_ARGUMENT;
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
break;
}
*pstatus = CACHE_INODE_SUCCESS;
/* valid the found entry, if this is not feasable, returns nothing to the client */
P_w(&pentry->lock);
if((*pstatus =
cache_inode_valid(pentry, CACHE_INODE_OP_GET, pclient)) != CACHE_INODE_SUCCESS)
{
V_w(&pentry->lock);
pentry = NULL;
}
V_w(&pentry->lock);
/* stats */
pclient->stat.func_stats.nb_success[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return pentry;
} /* cache_inode_get */
cache_inode_status_t
cache_inode_create(cache_entry_t *parent,
const char *name,
object_file_type_t type,
uint32_t mode,
cache_inode_create_arg_t *create_arg,
struct req_op_context *req_ctx,
cache_entry_t **entry)
{
cache_inode_status_t status = CACHE_INODE_SUCCESS;
fsal_status_t fsal_status = {0, 0};
struct fsal_obj_handle *object_handle;
struct attrlist object_attributes;
struct fsal_obj_handle *dir_handle;
cache_inode_create_arg_t zero_create_arg;
fsal_accessflags_t access_mask = 0;
memset(&zero_create_arg, 0, sizeof(zero_create_arg));
memset(&object_attributes, 0, sizeof(object_attributes));
if (create_arg == NULL) {
create_arg = &zero_create_arg;
}
if ((type != REGULAR_FILE) && (type != DIRECTORY) &&
(type != SYMBOLIC_LINK) && (type != SOCKET_FILE) &&
(type != FIFO_FILE) && (type != CHARACTER_FILE) &&
(type != BLOCK_FILE)) {
status = CACHE_INODE_BAD_TYPE;
*entry = NULL;
goto out;
}
/*
* Check if caller is allowed to perform the operation
*/
access_mask = FSAL_MODE_MASK_SET(FSAL_W_OK) |
FSAL_ACE4_MASK_SET(FSAL_ACE_PERM_ADD_FILE |
FSAL_ACE_PERM_ADD_SUBDIRECTORY);
status = cache_inode_access(parent,
access_mask,
req_ctx);
if (status != CACHE_INODE_SUCCESS)
{
*entry = NULL;
goto out;
}
/* Try to create it first */
dir_handle = parent->obj_handle;
/* we pass in attributes to the create. We will get them back below */
FSAL_SET_MASK(object_attributes.mask, ATTR_MODE|ATTR_OWNER|ATTR_GROUP);
object_attributes.owner = req_ctx->creds->caller_uid;
object_attributes.group = req_ctx->creds->caller_gid; /* be more selective? */
object_attributes.mode = mode;
switch (type) {
case REGULAR_FILE:
fsal_status = dir_handle->ops->create(dir_handle, req_ctx,
name,
&object_attributes,
&object_handle);
break;
case DIRECTORY:
fsal_status = dir_handle->ops->mkdir(dir_handle, req_ctx,
name,
&object_attributes,
&object_handle);
break;
case SYMBOLIC_LINK:
fsal_status = dir_handle->ops->symlink(dir_handle, req_ctx,
name,
create_arg->link_content,
&object_attributes,
&object_handle);
break;
case SOCKET_FILE:
case FIFO_FILE:
fsal_status = dir_handle->ops->mknode(dir_handle, req_ctx,
name,
type,
NULL, /* no dev_t needed */
&object_attributes,
&object_handle);
break;
case BLOCK_FILE:
case CHARACTER_FILE:
fsal_status = dir_handle->ops->mknode(dir_handle, req_ctx,
name,
type,
&create_arg->dev_spec,
&object_attributes,
&object_handle);
break;
default:
/* we should never go there */
status = CACHE_INODE_INCONSISTENT_ENTRY;
*entry = NULL;
goto out;
break;
}
cache_inode_refresh_attrs_locked(parent, req_ctx);
/* Check for the result */
if (FSAL_IS_ERROR(fsal_status)) {
if (fsal_status.major == ERR_FSAL_STALE) {
LogEvent(COMPONENT_CACHE_INODE,
"FSAL returned STALE on create type %d", type);
cache_inode_kill_entry(parent);
} else if (fsal_status.major == ERR_FSAL_EXIST) {
/* Already exists. Check if type if correct */
status = cache_inode_lookup(parent,
name,
req_ctx,
entry);
if (*entry != NULL) {
status = CACHE_INODE_ENTRY_EXISTS;
if ((*entry)->type != type) {
/* Incompatible types, returns NULL */
cache_inode_put(*entry);
*entry = NULL;
}
goto out;
}
if (status == CACHE_INODE_NOT_FOUND) {
/* Too bad, FSAL insist the file exists when we try to
* create it, but lookup couldn't find it, retry. */
status = CACHE_INODE_INCONSISTENT_ENTRY;
goto out;
}
}
status = cache_inode_error_convert(fsal_status);
*entry = NULL;
goto out;
}
status = cache_inode_new_entry(object_handle,
CACHE_INODE_FLAG_CREATE,
entry);
if (*entry == NULL) {
goto out;
}
PTHREAD_RWLOCK_wrlock(&parent->content_lock);
/* Add this entry to the directory (also takes an internal ref) */
status = cache_inode_add_cached_dirent(parent,
name,
*entry,
NULL);
PTHREAD_RWLOCK_unlock(&parent->content_lock);
if (status != CACHE_INODE_SUCCESS) {
cache_inode_put(*entry);
*entry = NULL;
goto out;
}
out:
return status;
}
static bool
populate_dirent(const char *name, void *dir_state,
fsal_cookie_t cookie)
{
struct cache_inode_populate_cb_state *state =
(struct cache_inode_populate_cb_state *)dir_state;
struct fsal_obj_handle *entry_hdl;
cache_inode_dir_entry_t *new_dir_entry = NULL;
cache_entry_t *cache_entry = NULL;
fsal_status_t fsal_status = { 0, 0 };
struct fsal_obj_handle *dir_hdl = state->directory->obj_handle;
fsal_status = dir_hdl->obj_ops.lookup(dir_hdl, name, &entry_hdl);
if (FSAL_IS_ERROR(fsal_status)) {
*state->status = cache_inode_error_convert(fsal_status);
if (*state->status == CACHE_INODE_FSAL_XDEV) {
LogInfo(COMPONENT_NFS_READDIR,
"Ignoring XDEV entry %s",
name);
*state->status = CACHE_INODE_SUCCESS;
return true;
}
LogInfo(COMPONENT_CACHE_INODE,
"Lookup failed on %s in dir %p with %s",
name, dir_hdl, cache_inode_err_str(*state->status));
return !cache_param.retry_readdir;
}
LogFullDebug(COMPONENT_NFS_READDIR, "Creating entry for %s", name);
*state->status =
cache_inode_new_entry(entry_hdl, CACHE_INODE_FLAG_NONE,
&cache_entry);
if (cache_entry == NULL) {
*state->status = CACHE_INODE_NOT_FOUND;
/* we do not free entry_hdl because it is consumed by
cache_inode_new_entry */
LogEvent(COMPONENT_NFS_READDIR,
"cache_inode_new_entry failed with %s",
cache_inode_err_str(*state->status));
return false;
}
if (cache_entry->type == DIRECTORY) {
/* Insert Parent's key */
cache_inode_key_dup(&cache_entry->object.dir.parent,
&state->directory->fh_hk.key);
}
*state->status =
cache_inode_add_cached_dirent(state->directory, name, cache_entry,
&new_dir_entry);
/* return initial ref */
cache_inode_put(cache_entry);
if ((*state->status != CACHE_INODE_SUCCESS) &&
(*state->status != CACHE_INODE_ENTRY_EXISTS)) {
LogEvent(COMPONENT_NFS_READDIR,
"cache_inode_add_cached_dirent failed with %s",
cache_inode_err_str(*state->status));
return false;
}
return true;
}
/**
*
* @brief Gets an entry by using its fsdata as a key and caches it if needed.
*
* Gets an entry by using its fsdata as a key and caches it if needed.
*
* If a cache entry is returned, its refcount is incremented by one.
*
* It turns out we do need cache_inode_get_located functionality for
* cases like lookupp on an entry returning itself when it isn't a
* root. Therefore, if the 'associated' parameter is equal to the got
* cache entry, a reference count is incremented but the structure
* pointed to by attr is NOT filled in.
*
* @param[in] fsdata File system data
* @param[out] attr The attributes of the got entry
* @param[in] context FSAL credentials
* @param[in] associated Entry that may be equal to the got entry
* @param[out] status Returned status
*
* @return If successful, the pointer to the entry; NULL otherwise
*
*/
cache_entry_t *
cache_inode_get(cache_inode_fsal_data_t *fsdata,
fsal_attrib_list_t *attr,
fsal_op_context_t *context,
cache_entry_t *associated,
cache_inode_status_t *status)
{
hash_buffer_t key, value;
cache_entry_t *entry = NULL;
fsal_status_t fsal_status = {0, 0};
cache_inode_create_arg_t create_arg = {
.newly_created_dir = FALSE
};
cache_inode_file_type_t type = UNASSIGNED;
hash_error_t hrc = 0;
fsal_attrib_list_t fsal_attributes;
fsal_handle_t *file_handle;
struct hash_latch latch;
/* Set the return default to CACHE_INODE_SUCCESS */
*status = CACHE_INODE_SUCCESS;
/* Turn the input to a hash key on our own.
*/
key.pdata = fsdata->fh_desc.start;
key.len = fsdata->fh_desc.len;
hrc = HashTable_GetLatch(fh_to_cache_entry_ht, &key, &value,
FALSE,
&latch);
if ((hrc != HASHTABLE_SUCCESS) &&
(hrc != HASHTABLE_ERROR_NO_SUCH_KEY)) {
/* This should not happened */
*status = CACHE_INODE_HASH_TABLE_ERROR;
LogCrit(COMPONENT_CACHE_INODE,
"Hash access failed with code %d"
" - this should not have happened",
hrc);
return NULL;
}
if (hrc == HASHTABLE_SUCCESS) {
/* Entry exists in the cache and was found */
entry = value.pdata;
/* take an extra reference within the critical section */
if (cache_inode_lru_ref(entry, LRU_REQ_INITIAL) !=
CACHE_INODE_SUCCESS) {
/* Dead entry. Treat like a lookup failure. */
entry = NULL;
} else {
if (entry == associated) {
/* Take a quick exit so we don't invert lock
ordering. */
HashTable_ReleaseLatched(fh_to_cache_entry_ht, &latch);
return entry;
}
}
}
HashTable_ReleaseLatched(fh_to_cache_entry_ht, &latch);
if (!context) {
/* Upcalls have no access to fsal_op_context_t,
so just return the entry without revalidating it or
creating a new one. */
if (entry == NULL) {
*status = CACHE_INODE_NOT_FOUND;
}
return entry;
}
if (!entry) {
/* Cache miss, allocate a new entry */
file_handle = (fsal_handle_t *) fsdata->fh_desc.start;
/* First, call FSAL to know what the object is */
fsal_attributes.asked_attributes = cache_inode_params.attrmask;
fsal_status
= FSAL_getattrs(file_handle, context, &fsal_attributes);
if (FSAL_IS_ERROR(fsal_status)) {
*status = cache_inode_error_convert(fsal_status);
LogDebug(COMPONENT_CACHE_INODE,
"cache_inode_get: cache_inode_status=%u "
"fsal_status=%u,%u ", *status,
fsal_status.major,
fsal_status.minor);
return NULL;
}
/* The type has to be set in the attributes */
if (!FSAL_TEST_MASK(fsal_attributes.supported_attributes,
FSAL_ATTR_TYPE)) {
*status = CACHE_INODE_FSAL_ERROR;
return NULL;
}
/* Get the cache_inode file type */
type = cache_inode_fsal_type_convert(fsal_attributes.type);
if (type == SYMBOLIC_LINK) {
fsal_attributes.asked_attributes = cache_inode_params.attrmask;
fsal_status =
FSAL_readlink(file_handle, context,
&create_arg.link_content,
&fsal_attributes);
if (FSAL_IS_ERROR(fsal_status)) {
*status = cache_inode_error_convert(fsal_status);
return NULL;
}
}
if ((entry
= cache_inode_new_entry(fsdata,
&fsal_attributes,
type,
&create_arg,
status)) == NULL) {
return NULL;
}
}
*status = CACHE_INODE_SUCCESS;
/* This is the replacement for cache_inode_renew_entry. Rather
than calling that function at the start of every cache_inode
call with the inode locked, we call cache_inode_check trust to
perform 'heavyweight' (timed expiration of cached attributes,
getattr-based directory trust) checks the first time after
getting an inode. It does all of the checks read-locked and
only acquires a write lock if there's something requiring a
change.
There is a second light-weight check done before use of cached
data that checks whether the bits saying that inode attributes
or inode content are trustworthy have been cleared by, for
example, FSAL_CB.
To summarize, the current implementation is that policy-based
trust of validity is checked once per logical series of
operations at cache_inode_get, and asynchronous trust is
checked with use (when the attributes are locked for reading,
for example.) */
if ((*status = cache_inode_check_trust(entry,
context))
!= CACHE_INODE_SUCCESS) {
goto out_put;
}
/* Set the returned attributes */
*status = cache_inode_lock_trust_attrs(entry, context);
/* cache_inode_lock_trust_attrs may fail, in that case, the
attributes are wrong and pthread_rwlock_unlock can't be called
again */
if(*status != CACHE_INODE_SUCCESS)
{
goto out_put;
}
*attr = entry->attributes;
pthread_rwlock_unlock(&entry->attr_lock);
return entry;
out_put:
cache_inode_put(entry);
entry = NULL;
return entry;
} /* cache_inode_get */
cache_entry_t *cache_inode_get_located(cache_inode_fsal_data_t * pfsdata,
cache_entry_t * plocation,
cache_inode_policy_t policy,
fsal_attrib_list_t * pattr,
hash_table_t * ht,
cache_inode_client_t * pclient,
fsal_op_context_t * pcontext,
cache_inode_status_t * pstatus)
{
hash_buffer_t key, value;
cache_entry_t *pentry = NULL;
fsal_status_t fsal_status;
cache_inode_create_arg_t create_arg;
cache_inode_file_type_t type;
int hrc = 0;
fsal_attrib_list_t fsal_attributes;
cache_inode_fsal_data_t *ppoolfsdata = NULL;
memset(&create_arg, 0, sizeof(create_arg));
/* Set the return default to CACHE_INODE_SUCCESS */
*pstatus = CACHE_INODE_SUCCESS;
/* stats */
/* cache_invalidate calls this with no context or client */
if (pclient) {
pclient->stat.nb_call_total += 1;
pclient->stat.func_stats.nb_call[CACHE_INODE_GET] += 1;
}
/* Turn the input to a hash key */
if(cache_inode_fsaldata_2_key(&key, pfsdata, pclient))
{
*pstatus = CACHE_INODE_UNAPPROPRIATED_KEY;
/* stats */
/* cache_invalidate calls this with no context or client */
if (pclient) {
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
ppoolfsdata = (cache_inode_fsal_data_t *) key.pdata;
ReleaseToPool(ppoolfsdata, &pclient->pool_key);
}
return NULL;
}
switch (hrc = HashTable_Get(ht, &key, &value))
{
case HASHTABLE_SUCCESS:
/* Entry exists in the cache and was found */
pentry = (cache_entry_t *) value.pdata;
/* return attributes additionally */
*pattr = pentry->attributes;
if ( !pclient ) {
/* invalidate. Just return it to mark it stale and go on. */
return( pentry );
}
break;
case HASHTABLE_ERROR_NO_SUCH_KEY:
if ( !pclient ) {
/* invalidate. Just return */
return( NULL );
}
/* Cache miss, allocate a new entry */
/* XXX I do not think this can happen with avl dirent cache */
if(pfsdata->cookie != DIR_START)
{
/* added for sanity check */
LogDebug(COMPONENT_CACHE_INODE,
"cache_inode_get: pfsdata->cookie != DIR_START (=%"PRIu64") on object whose type is %u",
pfsdata->cookie,
cache_inode_fsal_type_convert(fsal_attributes.type));
pfsdata->cookie = DIR_START;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
/* redo the call */
return cache_inode_get(pfsdata, policy, pattr, ht, pclient, pcontext, pstatus);
}
/* First, call FSAL to know what the object is */
fsal_attributes.asked_attributes = pclient->attrmask;
fsal_status = FSAL_getattrs(&pfsdata->handle, pcontext, &fsal_attributes);
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
LogDebug(COMPONENT_CACHE_INODE,
"cache_inode_get: cache_inode_status=%u fsal_status=%u,%u ",
*pstatus, fsal_status.major, fsal_status.minor);
if(fsal_status.major == ERR_FSAL_STALE)
{
char handle_str[256];
snprintHandle(handle_str, 256, &pfsdata->handle);
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_get: Stale FSAL File Handle %s, fsal_status=(%u,%u)",
handle_str, fsal_status.major, fsal_status.minor);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
}
/* The type has to be set in the attributes */
if(!FSAL_TEST_MASK(fsal_attributes.supported_attributes, FSAL_ATTR_TYPE))
{
*pstatus = CACHE_INODE_FSAL_ERROR;
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
}
/* Get the cache_inode file type */
type = cache_inode_fsal_type_convert(fsal_attributes.type);
if(type == SYMBOLIC_LINK)
{
if( CACHE_INODE_KEEP_CONTENT( policy ) )
{
FSAL_CLEAR_MASK(fsal_attributes.asked_attributes);
FSAL_SET_MASK(fsal_attributes.asked_attributes, pclient->attrmask);
fsal_status =
FSAL_readlink(&pfsdata->handle, pcontext, &create_arg.link_content,
&fsal_attributes);
}
else
{
fsal_status.major = ERR_FSAL_NO_ERROR ;
fsal_status.minor = 0 ;
}
if(FSAL_IS_ERROR(fsal_status))
{
*pstatus = cache_inode_error_convert(fsal_status);
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
if(fsal_status.major == ERR_FSAL_STALE)
{
cache_inode_status_t kill_status;
LogEvent(COMPONENT_CACHE_INODE,
"cache_inode_get: Stale FSAL File Handle detected for pentry = %p, fsal_status=(%u,%u)",
pentry, fsal_status.major, fsal_status.minor);
if(cache_inode_kill_entry(pentry, NO_LOCK, ht, pclient, &kill_status) !=
CACHE_INODE_SUCCESS)
LogCrit(COMPONENT_CACHE_INODE,
"cache_inode_get: Could not kill entry %p, status = %u, fsal_status=(%u,%u)",
pentry, kill_status, fsal_status.major, fsal_status.minor);
*pstatus = CACHE_INODE_FSAL_ESTALE;
}
return NULL;
}
}
/* Add the entry to the cache */
if ( type == 1)
LogCrit(COMPONENT_CACHE_INODE,"inode get");
if((pentry = cache_inode_new_entry( pfsdata,
&fsal_attributes,
type,
policy,
&create_arg,
NULL, /* never used to add a new DIR_CONTINUE within this function */
ht,
pclient,
pcontext,
FALSE, /* This is a population, not a creation */
pstatus ) ) == NULL )
{
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
}
/* Set the returned attributes */
*pattr = fsal_attributes;
/* Now, exit the switch/case and returns */
break;
default:
/* This should not happened */
*pstatus = CACHE_INODE_INVALID_ARGUMENT;
LogCrit(COMPONENT_CACHE_INODE,
"cache_inode_get returning CACHE_INODE_INVALID_ARGUMENT - this should not have happened");
if ( !pclient ) {
/* invalidate. Just return */
return( NULL );
}
/* stats */
pclient->stat.func_stats.nb_err_unrecover[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return NULL;
break;
}
/* Want to ASSERT pclient at this point */
*pstatus = CACHE_INODE_SUCCESS;
if (pentry->object.symlink != NULL) {
int stop_here;
stop_here = 1;
if (stop_here) {
stop_here = 2;
}
}
/* valid the found entry, if this is not feasable, returns nothing to the client */
if( plocation != NULL )
{
if( plocation != pentry )
{
P_w(&pentry->lock);
if((*pstatus =
cache_inode_valid(pentry, CACHE_INODE_OP_GET, pclient)) != CACHE_INODE_SUCCESS)
{
V_w(&pentry->lock);
pentry = NULL;
}
V_w(&pentry->lock);
}
}
/* stats */
pclient->stat.func_stats.nb_success[CACHE_INODE_GET] += 1;
/* Free this key */
cache_inode_release_fsaldata_key(&key, pclient);
return pentry;
} /* cache_inode_get_located */
