* After client receives reply, several pages will be integrated into dir page
* in PAGE_CACHE_SIZE (if PAGE_CACHE_SIZE greater than LU_PAGE_SIZE), and the
* lu_dirpage for this integrated page will be adjusted. See
- * lmv_adjust_dirpages().
+ * mdc_adjust_dirpages().
*
*/
-/**
- * The following three APIs will be used by llite to iterate directory
- * entries from MDC dir page caches.
- *
- * ll_dir_entry_start(next) will lookup(return) entry by op_hash_offset.
- * To avoid extra memory allocation, the @entry will be pointed to
- * the dir entries in MDC page directly, so these pages can not be released
- * until the entry has been accessed in ll_readdir(or statahead).
- *
- * The iterate process will be
- *
- * ll_dir_entry_start: locate the page in MDC, and return the first entry.
- * hold the page.
- *
- * ll_dir_entry_next: return the next entry in the current page, if it reaches
- * to the end, release current page.
- *
- * ll_dir_entry_end: release the last page.
- **/
-struct lu_dirent *ll_dir_entry_start(struct inode *dir,
- struct md_op_data *op_data,
- struct page **ppage)
+struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data,
+ __u64 offset, struct ll_dir_chain *chain)
{
- struct lu_dirent *entry = NULL;
- struct md_callback cb_op;
- int rc;
- ENTRY;
+ struct md_callback cb_op;
+ struct page *page;
+ int rc;
- LASSERT(*ppage == NULL);
cb_op.md_blocking_ast = ll_md_blocking_ast;
- op_data->op_cli_flags &= ~CLI_NEXT_ENTRY;
- rc = md_read_entry(ll_i2mdexp(dir), op_data, &cb_op, &entry, ppage);
+ rc = md_read_page(ll_i2mdexp(dir), op_data, &cb_op, offset, &page);
if (rc != 0)
- entry = ERR_PTR(rc);
- RETURN(entry);
+ return ERR_PTR(rc);
+
+ return page;
}
-struct lu_dirent *ll_dir_entry_next(struct inode *dir,
- struct md_op_data *op_data,
- struct lu_dirent *ent,
- struct page **ppage)
+void ll_release_page(struct inode *inode, struct page *page,
+ bool remove)
{
- struct lu_dirent *entry = NULL;
- struct md_callback cb_op;
- int rc;
- ENTRY;
-
- op_data->op_hash_offset = le64_to_cpu(ent->lde_hash);
-
- /* release last page */
- LASSERT(*ppage != NULL);
- kunmap(*ppage);
- page_cache_release(*ppage);
-
- cb_op.md_blocking_ast = ll_md_blocking_ast;
- op_data->op_cli_flags |= CLI_NEXT_ENTRY;
- rc = md_read_entry(ll_i2mdexp(dir), op_data, &cb_op, &entry, ppage);
- if (rc != 0)
- entry = ERR_PTR(rc);
+ kunmap(page);
+
+ /* Always remove the page for striped dir, because the page is
+ * built from temporarily in LMV layer */
+ if (inode != NULL && S_ISDIR(inode->i_mode) &&
+ ll_i2info(inode)->lli_lsm_md != NULL) {
+ __free_page(page);
+ return;
+ }
- RETURN(entry);
+ if (remove) {
+ lock_page(page);
+ if (likely(page->mapping != NULL))
+ truncate_complete_page(page->mapping, page);
+ unlock_page(page);
+ }
+ page_cache_release(page);
}
#ifdef HAVE_DIR_CONTEXT
-int ll_dir_read(struct inode *inode, struct md_op_data *op_data,
+int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
struct dir_context *ctx)
{
#else
-int ll_dir_read(struct inode *inode, struct md_op_data *op_data,
+int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data,
void *cookie, filldir_t filldir)
{
#endif
- struct ll_sb_info *sbi = ll_i2sbi(inode);
- struct ll_dir_chain chain;
- struct lu_dirent *ent;
- int api32 = ll_need_32bit_api(sbi);
- int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
- int done = 0;
- int rc = 0;
- __u64 hash = MDS_DIR_END_OFF;
- struct page *page = NULL;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ __u64 pos = *ppos;
+ bool is_api32 = ll_need_32bit_api(sbi);
+ bool is_hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
+ struct page *page;
+ struct ll_dir_chain chain;
+ bool done = false;
+ int rc = 0;
ENTRY;
- ll_dir_chain_init(&chain);
- for (ent = ll_dir_entry_start(inode, op_data, &page);
- ent != NULL && !IS_ERR(ent) && !done;
- ent = ll_dir_entry_next(inode, op_data, ent, &page)) {
- __u16 type;
- int namelen;
- struct lu_fid fid;
- __u64 lhash;
- __u64 ino;
-
- hash = le64_to_cpu(ent->lde_hash);
- if (hash < op_data->op_hash_offset)
- /*
- * Skip until we find target hash
- * value.
- */
- continue;
- namelen = le16_to_cpu(ent->lde_namelen);
- if (namelen == 0)
- /*
- * Skip dummy record.
- */
- continue;
+ ll_dir_chain_init(&chain);
- if (api32 && hash64)
- lhash = hash >> 32;
- else
- lhash = hash;
- fid_le_to_cpu(&fid, &ent->lde_fid);
- ino = cl_fid_build_ino(&fid, api32);
- type = ll_dirent_type_get(ent);
+ page = ll_get_dir_page(inode, op_data, pos, &chain);
+
+ while (rc == 0 && !done) {
+ struct lu_dirpage *dp;
+ struct lu_dirent *ent;
+ __u64 hash;
+ __u64 next;
+
+ if (IS_ERR(page)) {
+ rc = PTR_ERR(page);
+ break;
+ }
+ hash = MDS_DIR_END_OFF;
+ dp = page_address(page);
+ for (ent = lu_dirent_start(dp); ent != NULL && !done;
+ ent = lu_dirent_next(ent)) {
+ __u16 type;
+ int namelen;
+ struct lu_fid fid;
+ __u64 lhash;
+ __u64 ino;
+
+ hash = le64_to_cpu(ent->lde_hash);
+ if (hash < pos)
+ /*
+ * Skip until we find target hash
+ * value.
+ */
+ continue;
+
+ namelen = le16_to_cpu(ent->lde_namelen);
+ if (namelen == 0)
+ /*
+ * Skip dummy record.
+ */
+ continue;
+
+ if (is_api32 && is_hash64)
+ lhash = hash >> 32;
+ else
+ lhash = hash;
+ fid_le_to_cpu(&fid, &ent->lde_fid);
+ ino = cl_fid_build_ino(&fid, is_api32);
+ type = ll_dirent_type_get(ent);
+ /* For 'll_nfs_get_name_filldir()', it will try
+ * to access the 'ent' through its 'lde_name',
+ * so the parameter 'name' for 'filldir()' must
+ * be part of the 'ent'. */
#ifdef HAVE_DIR_CONTEXT
- /* For 'll_nfs_get_name_filldir()', it will try
- * to access the 'ent' through its 'lde_name',
- * so the parameter 'name' for 'filldir()' must
- * be part of the 'ent'. */
- done = !dir_emit(ctx, ent->lde_name, namelen, ino, type);
+ ctx->pos = lhash;
+ done = !dir_emit(ctx, ent->lde_name, namelen, ino,
+ type);
#else
- done = filldir(cookie, ent->lde_name, namelen, lhash,
- ino, type);
+ done = filldir(cookie, ent->lde_name, namelen, lhash,
+ ino, type);
#endif
+ }
+
if (done) {
- if (op_data->op_hash_offset != MDS_DIR_END_OFF)
- op_data->op_hash_offset = hash;
+ pos = hash;
+ ll_release_page(inode, page, false);
break;
}
- }
-
- if (IS_ERR(ent))
- rc = PTR_ERR(ent);
- else if (ent == NULL)
- op_data->op_hash_offset = MDS_DIR_END_OFF;
- if (page != NULL) {
- kunmap(page);
- page_cache_release(page);
+ next = le64_to_cpu(dp->ldp_hash_end);
+ pos = next;
+ if (pos == MDS_DIR_END_OFF) {
+ /*
+ * End of directory reached.
+ */
+ done = 1;
+ ll_release_page(inode, page, false);
+ } else {
+ /*
+ * Normal case: continue to the next
+ * page.
+ */
+ ll_release_page(inode, page,
+ le32_to_cpu(dp->ldp_flags) &
+ LDF_COLLIDE);
+ next = pos;
+ page = ll_get_dir_page(inode, op_data, pos,
+ &chain);
+ }
}
-
+#ifdef HAVE_DIR_CONTEXT
+ ctx->pos = pos;
+#else
+ *ppos = pos;
+#endif
ll_dir_chain_fini(&chain);
RETURN(rc);
}
* object */
if (fid_is_zero(&op_data->op_fid3)) {
rc = ll_dir_get_parent_fid(inode, &op_data->op_fid3);
- if (rc != 0)
+ if (rc != 0) {
+ ll_finish_md_op_data(op_data);
RETURN(rc);
+ }
}
}
- op_data->op_hash_offset = pos;
op_data->op_max_pages = sbi->ll_md_brw_pages;
#ifdef HAVE_DIR_CONTEXT
ctx->pos = pos;
- rc = ll_dir_read(inode, op_data, ctx);
+ rc = ll_dir_read(inode, &pos, op_data, ctx);
pos = ctx->pos;
#else
- rc = ll_dir_read(inode, op_data, cookie, filldir);
+ rc = ll_dir_read(inode, &pos, op_data, cookie, filldir);
#endif
if (lfd != NULL)
- lfd->lfd_pos = op_data->op_hash_offset;
+ lfd->lfd_pos = pos;
if (pos == MDS_DIR_END_OFF) {
if (api32)
pos = LL_DIR_END_OFF;
} else {
if (api32 && hash64)
- pos = op_data->op_hash_offset >> 32;
- else
- pos = op_data->op_hash_offset;
+ pos = pos >> 32;
}
#ifdef HAVE_DIR_CONTEXT
ctx->pos = pos;
if (!msp)
return -ENOMEM;
- strncpy(msp->mgs_param, string, MGS_PARAM_MAXLEN);
+ strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
sizeof(struct mgs_send_param), msp, NULL);
if (rc)
RETURN(ll_fid2path(inode, (void *)arg));
case LL_IOC_HSM_REQUEST: {
struct hsm_user_request *hur;
- int totalsize;
+ ssize_t totalsize;
OBD_ALLOC_PTR(hur);
if (hur == NULL)
/* Compute the whole struct size */
totalsize = hur_len(hur);
OBD_FREE_PTR(hur);
+ if (totalsize < 0)
+ RETURN(-E2BIG);
/* Final size will be more than double totalsize */
if (totalsize >= MDS_MAXREQSIZE / 3)
git://git.whamcloud.com / fs / lustre-release.git / blobdiff