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Diffstat (limited to 'fs/f2fs/namei.c')
-rw-r--r--fs/f2fs/namei.c246
1 files changed, 228 insertions, 18 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index a6bdddc33ce2..27b03776ffd2 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -13,6 +13,7 @@
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/ctype.h>
+#include <linux/dcache.h>
#include "f2fs.h"
#include "node.h"
@@ -22,14 +23,13 @@
static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
{
- struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
nid_t ino;
struct inode *inode;
bool nid_free = false;
int err;
- inode = new_inode(sb);
+ inode = new_inode(dir->i_sb);
if (!inode)
return ERR_PTR(-ENOMEM);
@@ -102,8 +102,7 @@ static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
bool excl)
{
- struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
struct inode *inode;
nid_t ino = 0;
int err;
@@ -146,8 +145,7 @@ static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
- struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
int err;
f2fs_balance_fs(sbi);
@@ -207,8 +205,7 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
{
- struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
struct inode *inode = dentry->d_inode;
struct f2fs_dir_entry *de;
struct page *page;
@@ -242,8 +239,7 @@ fail:
static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
- struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
struct inode *inode;
size_t symlen = strlen(symname) + 1;
int err;
@@ -330,8 +326,7 @@ static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t rdev)
{
- struct super_block *sb = dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
struct inode *inode;
int err = 0;
@@ -369,8 +364,7 @@ out:
static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
- struct super_block *sb = old_dir->i_sb;
- struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct f2fs_sb_info *sbi = F2FS_SB(old_dir->i_sb);
struct inode *old_inode = old_dentry->d_inode;
struct inode *new_inode = new_dentry->d_inode;
struct page *old_dir_page;
@@ -393,8 +387,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out_old;
}
- f2fs_lock_op(sbi);
-
if (new_inode) {
err = -ENOTEMPTY;
@@ -407,6 +399,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (!new_entry)
goto out_dir;
+ f2fs_lock_op(sbi);
+
err = acquire_orphan_inode(sbi);
if (err)
goto put_out_dir;
@@ -435,9 +429,13 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
update_inode_page(old_inode);
update_inode_page(new_inode);
} else {
+ f2fs_lock_op(sbi);
+
err = f2fs_add_link(new_dentry, old_inode);
- if (err)
+ if (err) {
+ f2fs_unlock_op(sbi);
goto out_dir;
+ }
if (old_dir_entry) {
inc_nlink(new_dir);
@@ -472,6 +470,7 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
return 0;
put_out_dir:
+ f2fs_unlock_op(sbi);
kunmap(new_page);
f2fs_put_page(new_page, 0);
out_dir:
@@ -479,7 +478,151 @@ out_dir:
kunmap(old_dir_page);
f2fs_put_page(old_dir_page, 0);
}
+out_old:
+ kunmap(old_page);
+ f2fs_put_page(old_page, 0);
+out:
+ return err;
+}
+
+static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct super_block *sb = old_dir->i_sb;
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ struct inode *old_inode = old_dentry->d_inode;
+ struct inode *new_inode = new_dentry->d_inode;
+ struct page *old_dir_page, *new_dir_page;
+ struct page *old_page, *new_page;
+ struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
+ struct f2fs_dir_entry *old_entry, *new_entry;
+ int old_nlink = 0, new_nlink = 0;
+ int err = -ENOENT;
+
+ f2fs_balance_fs(sbi);
+
+ old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+ if (!old_entry)
+ goto out;
+
+ new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
+ if (!new_entry)
+ goto out_old;
+
+ /* prepare for updating ".." directory entry info later */
+ if (old_dir != new_dir) {
+ if (S_ISDIR(old_inode->i_mode)) {
+ err = -EIO;
+ old_dir_entry = f2fs_parent_dir(old_inode,
+ &old_dir_page);
+ if (!old_dir_entry)
+ goto out_new;
+ }
+
+ if (S_ISDIR(new_inode->i_mode)) {
+ err = -EIO;
+ new_dir_entry = f2fs_parent_dir(new_inode,
+ &new_dir_page);
+ if (!new_dir_entry)
+ goto out_old_dir;
+ }
+ }
+
+ /*
+ * If cross rename between file and directory those are not
+ * in the same directory, we will inc nlink of file's parent
+ * later, so we should check upper boundary of its nlink.
+ */
+ if ((!old_dir_entry || !new_dir_entry) &&
+ old_dir_entry != new_dir_entry) {
+ old_nlink = old_dir_entry ? -1 : 1;
+ new_nlink = -old_nlink;
+ err = -EMLINK;
+ if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
+ (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
+ goto out_new_dir;
+ }
+
+ f2fs_lock_op(sbi);
+
+ err = update_dent_inode(old_inode, &new_dentry->d_name);
+ if (err)
+ goto out_unlock;
+
+ err = update_dent_inode(new_inode, &old_dentry->d_name);
+ if (err)
+ goto out_undo;
+
+ /* update ".." directory entry info of old dentry */
+ if (old_dir_entry)
+ f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
+
+ /* update ".." directory entry info of new dentry */
+ if (new_dir_entry)
+ f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
+
+ /* update directory entry info of old dir inode */
+ f2fs_set_link(old_dir, old_entry, old_page, new_inode);
+
+ down_write(&F2FS_I(old_inode)->i_sem);
+ file_lost_pino(old_inode);
+ up_write(&F2FS_I(old_inode)->i_sem);
+
+ update_inode_page(old_inode);
+
+ old_dir->i_ctime = CURRENT_TIME;
+ if (old_nlink) {
+ down_write(&F2FS_I(old_dir)->i_sem);
+ if (old_nlink < 0)
+ drop_nlink(old_dir);
+ else
+ inc_nlink(old_dir);
+ up_write(&F2FS_I(old_dir)->i_sem);
+ }
+ mark_inode_dirty(old_dir);
+ update_inode_page(old_dir);
+
+ /* update directory entry info of new dir inode */
+ f2fs_set_link(new_dir, new_entry, new_page, old_inode);
+
+ down_write(&F2FS_I(new_inode)->i_sem);
+ file_lost_pino(new_inode);
+ up_write(&F2FS_I(new_inode)->i_sem);
+
+ update_inode_page(new_inode);
+
+ new_dir->i_ctime = CURRENT_TIME;
+ if (new_nlink) {
+ down_write(&F2FS_I(new_dir)->i_sem);
+ if (new_nlink < 0)
+ drop_nlink(new_dir);
+ else
+ inc_nlink(new_dir);
+ up_write(&F2FS_I(new_dir)->i_sem);
+ }
+ mark_inode_dirty(new_dir);
+ update_inode_page(new_dir);
+
+ f2fs_unlock_op(sbi);
+ return 0;
+out_undo:
+ /* Still we may fail to recover name info of f2fs_inode here */
+ update_dent_inode(old_inode, &old_dentry->d_name);
+out_unlock:
f2fs_unlock_op(sbi);
+out_new_dir:
+ if (new_dir_entry) {
+ kunmap(new_dir_page);
+ f2fs_put_page(new_dir_page, 0);
+ }
+out_old_dir:
+ if (old_dir_entry) {
+ kunmap(old_dir_page);
+ f2fs_put_page(old_dir_page, 0);
+ }
+out_new:
+ kunmap(new_page);
+ f2fs_put_page(new_page, 0);
out_old:
kunmap(old_page);
f2fs_put_page(old_page, 0);
@@ -487,6 +630,71 @@ out:
return err;
}
+static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
+{
+ if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+ return -EINVAL;
+
+ if (flags & RENAME_EXCHANGE) {
+ return f2fs_cross_rename(old_dir, old_dentry,
+ new_dir, new_dentry);
+ }
+ /*
+ * VFS has already handled the new dentry existence case,
+ * here, we just deal with "RENAME_NOREPLACE" as regular rename.
+ */
+ return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
+}
+
+static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+ struct inode *inode;
+ int err;
+
+ inode = f2fs_new_inode(dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &f2fs_file_inode_operations;
+ inode->i_fop = &f2fs_file_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+
+ f2fs_lock_op(sbi);
+ err = acquire_orphan_inode(sbi);
+ if (err)
+ goto out;
+
+ err = f2fs_do_tmpfile(inode, dir);
+ if (err)
+ goto release_out;
+
+ /*
+ * add this non-linked tmpfile to orphan list, in this way we could
+ * remove all unused data of tmpfile after abnormal power-off.
+ */
+ add_orphan_inode(sbi, inode->i_ino);
+ f2fs_unlock_op(sbi);
+
+ alloc_nid_done(sbi, inode->i_ino);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+
+release_out:
+ release_orphan_inode(sbi);
+out:
+ f2fs_unlock_op(sbi);
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+ make_bad_inode(inode);
+ iput(inode);
+ alloc_nid_failed(sbi, inode->i_ino);
+ return err;
+}
+
const struct inode_operations f2fs_dir_inode_operations = {
.create = f2fs_create,
.lookup = f2fs_lookup,
@@ -497,6 +705,8 @@ const struct inode_operations f2fs_dir_inode_operations = {
.rmdir = f2fs_rmdir,
.mknod = f2fs_mknod,
.rename = f2fs_rename,
+ .rename2 = f2fs_rename2,
+ .tmpfile = f2fs_tmpfile,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.get_acl = f2fs_get_acl,