This adds core functions to get, read, write, and evict an inode.
Signed-off-by: Changman Lee <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/inode.c | 258 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 258 insertions(+)
create mode 100644 fs/f2fs/inode.c
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
new file mode 100644
index 0000000..1e409c2
--- /dev/null
+++ b/fs/f2fs/inode.c
@@ -0,0 +1,258 @@
+/**
+ * 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 "f2fs.h"
+#include "node.h"
+
+struct f2fs_iget_args {
+ u64 ino;
+ int on_free;
+};
+
+void f2fs_set_inode_flags(struct inode *inode)
+{
+ unsigned int flags = F2FS_I(inode)->i_flags;
+
+ inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
+ S_NOATIME | S_DIRSYNC);
+
+ if (flags & FS_SYNC_FL)
+ inode->i_flags |= S_SYNC;
+ if (flags & FS_APPEND_FL)
+ inode->i_flags |= S_APPEND;
+ if (flags & FS_IMMUTABLE_FL)
+ inode->i_flags |= S_IMMUTABLE;
+ if (flags & FS_NOATIME_FL)
+ inode->i_flags |= S_NOATIME;
+ if (flags & FS_DIRSYNC_FL)
+ inode->i_flags |= S_DIRSYNC;
+}
+
+static int f2fs_iget_test(struct inode *inode, void *data)
+{
+ struct f2fs_iget_args *args = data;
+
+ if (inode->i_ino != args->ino)
+ return 0;
+ if (inode->i_state & (I_FREEING | I_WILL_FREE)) {
+ args->on_free = 1;
+ return 0;
+ }
+ return 1;
+}
+
+struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino)
+{
+ struct f2fs_iget_args args = {
+ .ino = ino,
+ .on_free = 0
+ };
+ struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args);
+
+ if (inode)
+ return inode;
+ if (!args.on_free)
+ return f2fs_iget(sb, ino);
+ return ERR_PTR(-ENOENT);
+}
+
+static int do_read_inode(struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct page *node_page;
+ struct f2fs_node *rn;
+ struct f2fs_inode *ri;
+
+ /* Check if ino is within scope */
+ check_nid_range(sbi, inode->i_ino);
+
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page))
+ return PTR_ERR(node_page);
+
+ rn = page_address(node_page);
+ ri = &(rn->i);
+
+ inode->i_mode = le16_to_cpu(ri->i_mode);
+ inode->i_uid = le32_to_cpu(ri->i_uid);
+ inode->i_gid = 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 = le32_to_cpu(ri->i_atime);
+ inode->i_ctime.tv_sec = le32_to_cpu(ri->i_ctime);
+ inode->i_mtime.tv_sec = le32_to_cpu(ri->i_mtime);
+ inode->i_atime.tv_nsec = 0;
+ inode->i_ctime.tv_nsec = 0;
+ inode->i_mtime.tv_nsec = 0;
+ fi->current_depth = le32_to_cpu(ri->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->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
+ get_extent_info(&fi->ext, ri->i_ext);
+ f2fs_put_page(node_page, 1);
+ 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;
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ 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;
+
+ if (!sbi->por_doing && inode->i_nlink == 0) {
+ ret = -ENOENT;
+ 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_MOVABLE);
+ } else if (ino == F2FS_META_INO(sbi)) {
+ inode->i_mapping->a_ops = &f2fs_meta_aops;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_MOVABLE);
+ } 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_HIGHUSER_MOVABLE |
+ __GFP_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);
+
+ return inode;
+
+bad_inode:
+ iget_failed(inode);
+ return ERR_PTR(ret);
+}
+
+void update_inode(struct inode *inode, struct page *node_page)
+{
+ struct f2fs_node *rn;
+ struct f2fs_inode *ri;
+
+ wait_on_page_writeback(node_page);
+
+ rn = page_address(node_page);
+ ri = &(rn->i);
+
+ ri->i_mode = cpu_to_le16(inode->i_mode);
+ ri->i_uid = cpu_to_le32(inode->i_uid);
+ ri->i_gid = cpu_to_le32(inode->i_gid);
+ 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);
+ set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
+
+ ri->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
+ ri->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
+ ri->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
+ ri->current_depth = cpu_to_le32(F2FS_I(inode)->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);
+ set_page_dirty(node_page);
+}
+
+int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
+ struct page *node_page;
+ bool need_lock = false;
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi) ||
+ inode->i_ino == F2FS_META_INO(sbi))
+ return 0;
+
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page))
+ return PTR_ERR(node_page);
+
+ if (!PageDirty(node_page)) {
+ need_lock = true;
+ f2fs_put_page(node_page, 1);
+ mutex_lock(&sbi->write_inode);
+ node_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(node_page)) {
+ mutex_unlock(&sbi->write_inode);
+ return PTR_ERR(node_page);
+ }
+ }
+ update_inode(inode, node_page);
+ f2fs_put_page(node_page, 1);
+ if (need_lock)
+ mutex_unlock(&sbi->write_inode);
+ 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_SB(inode->i_sb);
+
+ truncate_inode_pages(&inode->i_data, 0);
+
+ if (inode->i_ino == F2FS_NODE_INO(sbi) ||
+ inode->i_ino == F2FS_META_INO(sbi))
+ goto no_delete;
+
+ BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
+ remove_dirty_dir_inode(inode);
+
+ if (inode->i_nlink || is_bad_inode(inode))
+ goto no_delete;
+
+ set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
+ i_size_write(inode, 0);
+
+ if (F2FS_HAS_BLOCKS(inode))
+ f2fs_truncate(inode);
+
+ remove_inode_page(inode);
+no_delete:
+ clear_inode(inode);
+}
--
1.7.9.5
---
Jaegeuk Kim
Samsung
김재극 <[email protected]> writes:
> This adds core functions to get, read, write, and evict an inode.
As is this code won't compile if user namespace support is enabled.
Suggested fixes below.
Eric
> +static int do_read_inode(struct inode *inode)
> +{
> + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
> + struct f2fs_inode_info *fi = F2FS_I(inode);
> + struct page *node_page;
> + struct f2fs_node *rn;
> + struct f2fs_inode *ri;
> +
> + /* Check if ino is within scope */
> + check_nid_range(sbi, inode->i_ino);
> +
> + node_page = get_node_page(sbi, inode->i_ino);
> + if (IS_ERR(node_page))
> + return PTR_ERR(node_page);
> +
> + rn = page_address(node_page);
> + ri = &(rn->i);
> +
> + inode->i_mode = le16_to_cpu(ri->i_mode);
> + inode->i_uid = le32_to_cpu(ri->i_uid);
> + inode->i_gid = le32_to_cpu(ri->i_gid);
Could you make this:
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 = le32_to_cpu(ri->i_atime);
> + inode->i_ctime.tv_sec = le32_to_cpu(ri->i_ctime);
> + inode->i_mtime.tv_sec = le32_to_cpu(ri->i_mtime);
> + inode->i_atime.tv_nsec = 0;
> + inode->i_ctime.tv_nsec = 0;
> + inode->i_mtime.tv_nsec = 0;
> + fi->current_depth = le32_to_cpu(ri->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->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
> + get_extent_info(&fi->ext, ri->i_ext);
> + f2fs_put_page(node_page, 1);
> + return 0;
> +}
> +void update_inode(struct inode *inode, struct page *node_page)
> +{
> + struct f2fs_node *rn;
> + struct f2fs_inode *ri;
> +
> + wait_on_page_writeback(node_page);
> +
> + rn = page_address(node_page);
> + ri = &(rn->i);
> +
> + ri->i_mode = cpu_to_le16(inode->i_mode);
> + ri->i_uid = cpu_to_le32(inode->i_uid);
> + ri->i_gid = cpu_to_le32(inode->i_gid);
And make this:
i_uid_write(inode, le32_to_cpu(ri->i_uid));
i_gid_write(inode, le32_to_cpu(ri->i_gid));
> + 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);
> + set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
> +
> + ri->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
> + ri->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
> + ri->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
> + ri->current_depth = cpu_to_le32(F2FS_I(inode)->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);
> + set_page_dirty(node_page);
> +}
2012-10-05 (금), 13:28 -0700, Eric W. Biederman:
> 김재극 <[email protected]> writes:
>
> > This adds core functions to get, read, write, and evict an inode.
>
> As is this code won't compile if user namespace support is enabled.
> Suggested fixes below.
Ok, I'll check this out.
Thanks,
>
> Eric
>
>
> > +static int do_read_inode(struct inode *inode)
> > +{
> > + struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
> > + struct f2fs_inode_info *fi = F2FS_I(inode);
> > + struct page *node_page;
> > + struct f2fs_node *rn;
> > + struct f2fs_inode *ri;
> > +
> > + /* Check if ino is within scope */
> > + check_nid_range(sbi, inode->i_ino);
> > +
> > + node_page = get_node_page(sbi, inode->i_ino);
> > + if (IS_ERR(node_page))
> > + return PTR_ERR(node_page);
> > +
> > + rn = page_address(node_page);
> > + ri = &(rn->i);
> > +
> > + inode->i_mode = le16_to_cpu(ri->i_mode);
> > + inode->i_uid = le32_to_cpu(ri->i_uid);
> > + inode->i_gid = le32_to_cpu(ri->i_gid);
>
> Could you make this:
> 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 = le32_to_cpu(ri->i_atime);
> > + inode->i_ctime.tv_sec = le32_to_cpu(ri->i_ctime);
> > + inode->i_mtime.tv_sec = le32_to_cpu(ri->i_mtime);
> > + inode->i_atime.tv_nsec = 0;
> > + inode->i_ctime.tv_nsec = 0;
> > + inode->i_mtime.tv_nsec = 0;
> > + fi->current_depth = le32_to_cpu(ri->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->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
> > + get_extent_info(&fi->ext, ri->i_ext);
> > + f2fs_put_page(node_page, 1);
> > + return 0;
> > +}
>
> > +void update_inode(struct inode *inode, struct page *node_page)
> > +{
> > + struct f2fs_node *rn;
> > + struct f2fs_inode *ri;
> > +
> > + wait_on_page_writeback(node_page);
> > +
> > + rn = page_address(node_page);
> > + ri = &(rn->i);
> > +
> > + ri->i_mode = cpu_to_le16(inode->i_mode);
> > + ri->i_uid = cpu_to_le32(inode->i_uid);
> > + ri->i_gid = cpu_to_le32(inode->i_gid);
> And make this:
> i_uid_write(inode, le32_to_cpu(ri->i_uid));
> i_gid_write(inode, le32_to_cpu(ri->i_gid));
>
> > + 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);
> > + set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
> > +
> > + ri->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
> > + ri->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
> > + ri->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
> > + ri->current_depth = cpu_to_le32(F2FS_I(inode)->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);
> > + set_page_dirty(node_page);
> > +}
> --
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--
Jaegeuk Kim
Samsung
Changman Lee <[email protected]> writes:
>> > +void update_inode(struct inode *inode, struct page *node_page)
>> > +{
>> > + struct f2fs_node *rn;
>> > + struct f2fs_inode *ri;
>> > +
>> > + wait_on_page_writeback(node_page);
>> > +
>> > + rn = page_address(node_page);
>> > + ri = &(rn->i);
>> > +
>> > + ri->i_mode = cpu_to_le16(inode->i_mode);
>> > + ri->i_uid = cpu_to_le32(inode->i_uid);
>> > + ri->i_gid = cpu_to_le32(inode->i_gid);
>> And make this:
>> i_uid_write(inode, le32_to_cpu(ri->i_uid));
>> i_gid_write(inode, le32_to_cpu(ri->i_gid));
>>
>
> You mean this. Right? :)
> ri->i_uid = cpu_to_le32(i_uid_read(inode));
> ri->i_gid = cpu_to_le32(i_gid_read(inode));
Yeah. ;)
I did have that one backwards.
Eric