AcoSail/kernel_optimize_test
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ufs: don't bother with lock_ufs()/unlock_ufs() for directory access

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We are already serialized by ->i_mutex and operations on different
directories are independent.  These calls are just rudiments of
blind BKL conversion and they should've been removed back then.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-06-16 01:50:43 -04:00
parent 514d748f69
commit a50e4a02ad
1 changed files with 14 additions and 40 deletions
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54
fs/ufs/namei.c
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@ -56,11 +56,9 @@ static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsi
if (dentry->d_name.len > UFS_MAXNAMLEN)
return ERR_PTR(-ENAMETOOLONG);
lock_ufs(dir->i_sb);
ino = ufs_inode_by_name(dir, &dentry->d_name);
if (ino)
inode = ufs_iget(dir->i_sb, ino);
unlock_ufs(dir->i_sb);
return d_splice_alias(inode, dentry);
}
@ -76,24 +74,16 @@ static int ufs_create (struct inode * dir, struct dentry * dentry, umode_t mode,
bool excl)
{
struct inode *inode;
int err;
UFSD("BEGIN\n");
inode = ufs_new_inode(dir, mode);
err = PTR_ERR(inode);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ufs_file_inode_operations;
inode->i_fop = &ufs_file_operations;
inode->i_mapping->a_ops = &ufs_aops;
mark_inode_dirty(inode);
lock_ufs(dir->i_sb);
err = ufs_add_nondir(dentry, inode);
unlock_ufs(dir->i_sb);
}
UFSD("END: err=%d\n", err);
return err;
inode->i_op = &ufs_file_inode_operations;
inode->i_fop = &ufs_file_operations;
inode->i_mapping->a_ops = &ufs_aops;
mark_inode_dirty(inode);
return ufs_add_nondir(dentry, inode);
}
static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
@ -110,9 +100,7 @@ static int ufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev
init_special_inode(inode, mode, rdev);
ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
mark_inode_dirty(inode);
lock_ufs(dir->i_sb);
err = ufs_add_nondir(dentry, inode);
unlock_ufs(dir->i_sb);
}
return err;
}
@ -121,18 +109,17 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
const char * symname)
{
struct super_block * sb = dir->i_sb;
int err = -ENAMETOOLONG;
int err;
unsigned l = strlen(symname)+1;
struct inode * inode;
if (l > sb->s_blocksize)
goto out_notlocked;
return -ENAMETOOLONG;
lock_ufs(dir->i_sb);
inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out;
return err;
if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
/* slow symlink */
@ -149,17 +136,13 @@ static int ufs_symlink (struct inode * dir, struct dentry * dentry,
}
mark_inode_dirty(inode);
err = ufs_add_nondir(dentry, inode);
out:
unlock_ufs(dir->i_sb);
out_notlocked:
return err;
return ufs_add_nondir(dentry, inode);
out_fail:
inode_dec_link_count(inode);
unlock_new_inode(inode);
iput(inode);
goto out;
return err;
}
static int ufs_link (struct dentry * old_dentry, struct inode * dir,
@ -168,8 +151,6 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
struct inode *inode = d_inode(old_dentry);
int error;
lock_ufs(dir->i_sb);
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
@ -180,7 +161,6 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
iput(inode);
} else
d_instantiate(dentry, inode);
unlock_ufs(dir->i_sb);
return error;
}
@ -189,7 +169,6 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
struct inode * inode;
int err;
lock_ufs(dir->i_sb);
inode_inc_link_count(dir);
inode = ufs_new_inode(dir, S_IFDIR|mode);
@ -210,12 +189,10 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
err = ufs_add_link(dentry, inode);
if (err)
goto out_fail;
unlock_ufs(dir->i_sb);
unlock_new_inode(inode);
d_instantiate(dentry, inode);
out:
return err;
return 0;
out_fail:
inode_dec_link_count(inode);
@ -224,8 +201,7 @@ static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
iput (inode);
out_dir:
inode_dec_link_count(dir);
unlock_ufs(dir->i_sb);
goto out;
return err;
}
static int ufs_unlink(struct inode *dir, struct dentry *dentry)
@ -255,7 +231,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
struct inode * inode = d_inode(dentry);
int err= -ENOTEMPTY;
lock_ufs(dir->i_sb);
if (ufs_empty_dir (inode)) {
err = ufs_unlink(dir, dentry);
if (!err) {
@ -264,7 +239,6 @@ static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
inode_dec_link_count(dir);
}
}
unlock_ufs(dir->i_sb);
return err;
}