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authorJeff Mahoney <jeffm@suse.com>2013-08-08 17:27:19 -0400
committerJeff Mahoney <jeffm@suse.de>2013-08-08 17:27:19 -0400
commit4c05141df57f4ffc1a9a28f1925434924179bfe4 (patch)
treed210b251b6f46e50b27f4db4f15010f9b40aad45 /fs/reiserfs/inode.c
parentc095ba7224d8edc71dcef0d655911399a8bd4a3f (diff)
reiserfs: locking, push write lock out of xattr code
The reiserfs xattr code doesn't need the write lock and sleeps all over the place. We can simplify the locking by releasing it and reacquiring after the xattr call. Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Diffstat (limited to 'fs/reiserfs/inode.c')
-rw-r--r--fs/reiserfs/inode.c38
1 files changed, 20 insertions, 18 deletions
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 0048cc16a6a8..bf1331a0f04b 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -30,7 +30,6 @@ void reiserfs_evict_inode(struct inode *inode)
JOURNAL_PER_BALANCE_CNT * 2 +
2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb);
struct reiserfs_transaction_handle th;
- int depth;
int err;
if (!inode->i_nlink && !is_bad_inode(inode))
@@ -40,12 +39,14 @@ void reiserfs_evict_inode(struct inode *inode)
if (inode->i_nlink)
goto no_delete;
- depth = reiserfs_write_lock_once(inode->i_sb);
-
/* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) { /* also handles bad_inode case */
+ int depth;
+
reiserfs_delete_xattrs(inode);
+ depth = reiserfs_write_lock_once(inode->i_sb);
+
if (journal_begin(&th, inode->i_sb, jbegin_count))
goto out;
reiserfs_update_inode_transaction(inode);
@@ -72,12 +73,12 @@ void reiserfs_evict_inode(struct inode *inode)
/* all items of file are deleted, so we can remove "save" link */
remove_save_link(inode, 0 /* not truncate */ ); /* we can't do anything
* about an error here */
+out:
+ reiserfs_write_unlock_once(inode->i_sb, depth);
} else {
/* no object items are in the tree */
;
}
- out:
- reiserfs_write_unlock_once(inode->i_sb, depth);
clear_inode(inode); /* note this must go after the journal_end to prevent deadlock */
dquot_drop(inode);
inode->i_blocks = 0;
@@ -1941,7 +1942,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
}
if (reiserfs_posixacl(inode->i_sb)) {
+ reiserfs_write_unlock(inode->i_sb);
retval = reiserfs_inherit_default_acl(th, dir, dentry, inode);
+ reiserfs_write_lock(inode->i_sb);
if (retval) {
err = retval;
reiserfs_check_path(&path_to_key);
@@ -1956,7 +1959,9 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
inode->i_flags |= S_PRIVATE;
if (security->name) {
+ reiserfs_write_unlock(inode->i_sb);
retval = reiserfs_security_write(th, inode, security);
+ reiserfs_write_lock(inode->i_sb);
if (retval) {
err = retval;
reiserfs_check_path(&path_to_key);
@@ -3129,6 +3134,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
*/
if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
attr->ia_size > MAX_NON_LFS) {
+ reiserfs_write_unlock_once(inode->i_sb, depth);
error = -EFBIG;
goto out;
}
@@ -3150,8 +3156,10 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
if (err)
error = err;
}
- if (error)
+ if (error) {
+ reiserfs_write_unlock_once(inode->i_sb, depth);
goto out;
+ }
/*
* file size is changed, ctime and mtime are
* to be updated
@@ -3159,6 +3167,7 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME);
}
}
+ reiserfs_write_unlock_once(inode->i_sb, depth);
if ((((attr->ia_valid & ATTR_UID) && (from_kuid(&init_user_ns, attr->ia_uid) & ~0xffff)) ||
((attr->ia_valid & ATTR_GID) && (from_kgid(&init_user_ns, attr->ia_gid) & ~0xffff))) &&
@@ -3183,14 +3192,16 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
return error;
/* (user+group)*(old+new) structure - we count quota info and , inode write (sb, inode) */
+ depth = reiserfs_write_lock_once(inode->i_sb);
error = journal_begin(&th, inode->i_sb, jbegin_count);
+ reiserfs_write_unlock_once(inode->i_sb, depth);
if (error)
goto out;
- reiserfs_write_unlock_once(inode->i_sb, depth);
error = dquot_transfer(inode, attr);
depth = reiserfs_write_lock_once(inode->i_sb);
if (error) {
journal_end(&th, inode->i_sb, jbegin_count);
+ reiserfs_write_unlock_once(inode->i_sb, depth);
goto out;
}
@@ -3202,17 +3213,11 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
inode->i_gid = attr->ia_gid;
mark_inode_dirty(inode);
error = journal_end(&th, inode->i_sb, jbegin_count);
+ reiserfs_write_unlock_once(inode->i_sb, depth);
if (error)
goto out;
}
- /*
- * Relax the lock here, as it might truncate the
- * inode pages and wait for inode pages locks.
- * To release such page lock, the owner needs the
- * reiserfs lock
- */
- reiserfs_write_unlock_once(inode->i_sb, depth);
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
error = inode_newsize_ok(inode, attr->ia_size);
@@ -3226,16 +3231,13 @@ int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
setattr_copy(inode, attr);
mark_inode_dirty(inode);
}
- depth = reiserfs_write_lock_once(inode->i_sb);
if (!error && reiserfs_posixacl(inode->i_sb)) {
if (attr->ia_valid & ATTR_MODE)
error = reiserfs_acl_chmod(inode);
}
- out:
- reiserfs_write_unlock_once(inode->i_sb, depth);
-
+out:
return error;
}