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-rw-r--r--kernel/fs/f2fs/inode.c387
1 files changed, 387 insertions, 0 deletions
diff --git a/kernel/fs/f2fs/inode.c b/kernel/fs/f2fs/inode.c
new file mode 100644
index 000000000..e622ec954
--- /dev/null
+++ b/kernel/fs/f2fs/inode.c
@@ -0,0 +1,387 @@
+/*
+ * fs/f2fs/inode.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/buffer_head.h>
+#include <linux/writeback.h>
+#include <linux/bitops.h>
+
+#include "f2fs.h"
+#include "node.h"
+
+#include <trace/events/f2fs.h>
+
+void f2fs_set_inode_flags(struct inode *inode)
+{
+ unsigned int flags = F2FS_I(inode)->i_flags;
+ unsigned int new_fl = 0;
+
+ if (flags & FS_SYNC_FL)
+ new_fl |= S_SYNC;
+ if (flags & FS_APPEND_FL)
+ new_fl |= S_APPEND;
+ if (flags & FS_IMMUTABLE_FL)
+ new_fl |= S_IMMUTABLE;
+ if (flags & FS_NOATIME_FL)
+ new_fl |= S_NOATIME;
+ if (flags & FS_DIRSYNC_FL)
+ new_fl |= S_DIRSYNC;
+ set_mask_bits(&inode->i_flags,
+ S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC, new_fl);
+}
+
+static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
+{
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
+ S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
+ if (ri->i_addr[0])
+ inode->i_rdev =
+ old_decode_dev(le32_to_cpu(ri->i_addr[0]));
+ else
+ inode->i_rdev =
+ new_decode_dev(le32_to_cpu(ri->i_addr[1]));
+ }
+}
+
+static bool __written_first_block(struct f2fs_inode *ri)
+{
+ block_t addr = le32_to_cpu(ri->i_addr[0]);
+
+ if (addr != NEW_ADDR && addr != NULL_ADDR)
+ return true;
+ return false;
+}
+
+static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
+{
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
+ if (old_valid_dev(inode->i_rdev)) {
+ ri->i_addr[0] =
+ cpu_to_le32(old_encode_dev(inode->i_rdev));
+ ri->i_addr[1] = 0;
+ } else {
+ ri->i_addr[0] = 0;
+ ri->i_addr[1] =
+ cpu_to_le32(new_encode_dev(inode->i_rdev));
+ ri->i_addr[2] = 0;
+ }
+ }
+}
+
+static void __recover_inline_status(struct inode *inode, struct page *ipage)
+{
+ void *inline_data = inline_data_addr(ipage);
+ __le32 *start = inline_data;
+ __le32 *end = start + MAX_INLINE_DATA / sizeof(__le32);
+
+ while (start < end) {
+ if (*start++) {
+ f2fs_wait_on_page_writeback(ipage, NODE);
+
+ set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
+ set_raw_inline(F2FS_I(inode), F2FS_INODE(ipage));
+ set_page_dirty(ipage);
+ return;
+ }
+ }
+ return;
+}
+
+static int do_read_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct page *node_page;
+ struct f2fs_inode *ri;
+
+ /* Check if ino is within scope */
+ if (check_nid_range(sbi, inode->i_ino)) {
+ f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
+ (unsigned long) inode->i_ino);
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page))
+ return PTR_ERR(node_page);
+
+ ri = F2FS_INODE(node_page);
+
+ inode->i_mode = le16_to_cpu(ri->i_mode);
+ i_uid_write(inode, le32_to_cpu(ri->i_uid));
+ i_gid_write(inode, le32_to_cpu(ri->i_gid));
+ set_nlink(inode, le32_to_cpu(ri->i_links));
+ inode->i_size = le64_to_cpu(ri->i_size);
+ inode->i_blocks = le64_to_cpu(ri->i_blocks);
+
+ inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
+ inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
+ inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
+ inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
+ inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
+ inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
+ inode->i_generation = le32_to_cpu(ri->i_generation);
+
+ fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
+ fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
+ fi->i_flags = le32_to_cpu(ri->i_flags);
+ fi->flags = 0;
+ fi->i_advise = ri->i_advise;
+ fi->i_pino = le32_to_cpu(ri->i_pino);
+ fi->i_dir_level = ri->i_dir_level;
+
+ f2fs_init_extent_cache(inode, &ri->i_ext);
+
+ get_inline_info(fi, ri);
+
+ /* check data exist */
+ if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
+ __recover_inline_status(inode, node_page);
+
+ /* get rdev by using inline_info */
+ __get_inode_rdev(inode, ri);
+
+ if (__written_first_block(ri))
+ set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
+
+ f2fs_put_page(node_page, 1);
+
+ stat_inc_inline_inode(inode);
+ stat_inc_inline_dir(inode);
+
+ return 0;
+}
+
+struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *inode;
+ int ret = 0;
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ if (!(inode->i_state & I_NEW)) {
+ trace_f2fs_iget(inode);
+ return inode;
+ }
+ if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
+ goto make_now;
+
+ ret = do_read_inode(inode);
+ if (ret)
+ goto bad_inode;
+make_now:
+ if (ino == F2FS_NODE_INO(sbi)) {
+ inode->i_mapping->a_ops = &f2fs_node_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
+ } else if (ino == F2FS_META_INO(sbi)) {
+ inode->i_mapping->a_ops = &f2fs_meta_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
+ } else if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &f2fs_file_inode_operations;
+ inode->i_fop = &f2fs_file_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &f2fs_dir_inode_operations;
+ inode->i_fop = &f2fs_dir_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
+ } else if (S_ISLNK(inode->i_mode)) {
+ inode->i_op = &f2fs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+ } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
+ S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
+ inode->i_op = &f2fs_special_inode_operations;
+ init_special_inode(inode, inode->i_mode, inode->i_rdev);
+ } else {
+ ret = -EIO;
+ goto bad_inode;
+ }
+ unlock_new_inode(inode);
+ trace_f2fs_iget(inode);
+ return inode;
+
+bad_inode:
+ iget_failed(inode);
+ trace_f2fs_iget_exit(inode, ret);
+ return ERR_PTR(ret);
+}
+
+void update_inode(struct inode *inode, struct page *node_page)
+{
+ struct f2fs_inode *ri;
+
+ f2fs_wait_on_page_writeback(node_page, NODE);
+
+ ri = F2FS_INODE(node_page);
+
+ ri->i_mode = cpu_to_le16(inode->i_mode);
+ ri->i_advise = F2FS_I(inode)->i_advise;
+ ri->i_uid = cpu_to_le32(i_uid_read(inode));
+ ri->i_gid = cpu_to_le32(i_gid_read(inode));
+ ri->i_links = cpu_to_le32(inode->i_nlink);
+ ri->i_size = cpu_to_le64(i_size_read(inode));
+ ri->i_blocks = cpu_to_le64(inode->i_blocks);
+
+ read_lock(&F2FS_I(inode)->ext_lock);
+ set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
+ read_unlock(&F2FS_I(inode)->ext_lock);
+
+ set_raw_inline(F2FS_I(inode), ri);
+
+ ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
+ ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
+ ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
+ ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+ ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
+ ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
+ ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
+ ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
+ ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
+ ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
+ ri->i_generation = cpu_to_le32(inode->i_generation);
+ ri->i_dir_level = F2FS_I(inode)->i_dir_level;
+
+ __set_inode_rdev(inode, ri);
+ set_cold_node(inode, node_page);
+ set_page_dirty(node_page);
+
+ clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
+}
+
+void update_inode_page(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ struct page *node_page;
+retry:
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page)) {
+ int err = PTR_ERR(node_page);
+ if (err == -ENOMEM) {
+ cond_resched();
+ goto retry;
+ } else if (err != -ENOENT) {
+ f2fs_stop_checkpoint(sbi);
+ }
+ return;
+ }
+ update_inode(inode, node_page);
+ f2fs_put_page(node_page, 1);
+}
+
+int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi) ||
+ inode->i_ino == F2FS_META_INO(sbi))
+ return 0;
+
+ if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
+ return 0;
+
+ /*
+ * We need to lock here to prevent from producing dirty node pages
+ * during the urgent cleaning time when runing out of free sections.
+ */
+ f2fs_lock_op(sbi);
+ update_inode_page(inode);
+ f2fs_unlock_op(sbi);
+
+ if (wbc)
+ f2fs_balance_fs(sbi);
+
+ return 0;
+}
+
+/*
+ * Called at the last iput() if i_nlink is zero
+ */
+void f2fs_evict_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ nid_t xnid = F2FS_I(inode)->i_xattr_nid;
+
+ /* some remained atomic pages should discarded */
+ if (f2fs_is_atomic_file(inode))
+ commit_inmem_pages(inode, true);
+
+ trace_f2fs_evict_inode(inode);
+ truncate_inode_pages_final(&inode->i_data);
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi) ||
+ inode->i_ino == F2FS_META_INO(sbi))
+ goto out_clear;
+
+ f2fs_bug_on(sbi, get_dirty_pages(inode));
+ remove_dirty_dir_inode(inode);
+
+ if (inode->i_nlink || is_bad_inode(inode))
+ goto no_delete;
+
+ sb_start_intwrite(inode->i_sb);
+ set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
+ i_size_write(inode, 0);
+
+ if (F2FS_HAS_BLOCKS(inode))
+ f2fs_truncate(inode);
+
+ f2fs_lock_op(sbi);
+ remove_inode_page(inode);
+ f2fs_unlock_op(sbi);
+
+ sb_end_intwrite(inode->i_sb);
+no_delete:
+ stat_dec_inline_dir(inode);
+ stat_dec_inline_inode(inode);
+
+ /* update extent info in inode */
+ if (inode->i_nlink)
+ f2fs_preserve_extent_tree(inode);
+ f2fs_destroy_extent_tree(inode);
+
+ invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
+ if (xnid)
+ invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
+ if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE))
+ add_dirty_inode(sbi, inode->i_ino, APPEND_INO);
+ if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE))
+ add_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
+out_clear:
+ clear_inode(inode);
+}
+
+/* caller should call f2fs_lock_op() */
+void handle_failed_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+
+ clear_nlink(inode);
+ make_bad_inode(inode);
+ unlock_new_inode(inode);
+
+ i_size_write(inode, 0);
+ if (F2FS_HAS_BLOCKS(inode))
+ f2fs_truncate(inode);
+
+ remove_inode_page(inode);
+
+ clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
+ clear_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
+ alloc_nid_failed(sbi, inode->i_ino);
+ f2fs_unlock_op(sbi);
+
+ /* iput will drop the inode object */
+ iput(inode);
+}