diff options
Diffstat (limited to 'fs/ocfs2/namei.c')
| -rw-r--r-- | fs/ocfs2/namei.c | 116 |
1 files changed, 82 insertions, 34 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index 0d3e939..5a942e0 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -199,10 +199,32 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, spin_unlock(&oi->ip_lock); bail_add: - dentry->d_op = &ocfs2_dentry_ops; ret = d_splice_alias(inode, dentry); + if (inode) { + /* + * If d_splice_alias() finds a DCACHE_DISCONNECTED + * dentry, it will d_move() it on top of ourse. The + * return value will indicate this however, so in + * those cases, we switch them around for the locking + * code. + * + * NOTE: This dentry already has ->d_op set from + * ocfs2_get_parent() and ocfs2_get_dentry() + */ + if (ret) + dentry = ret; + + status = ocfs2_dentry_attach_lock(dentry, inode, + OCFS2_I(dir)->ip_blkno, 0); + if (status) { + mlog_errno(status); + ret = ERR_PTR(status); + goto bail_unlock; + } + } + bail_unlock: /* Don't drop the cluster lock until *after* the d_add -- * unlink on another node will message us to remove that @@ -418,6 +440,13 @@ static int ocfs2_mknod(struct inode *dir, goto leave; } + status = ocfs2_dentry_attach_lock(dentry, inode, + OCFS2_I(dir)->ip_blkno, 1); + if (status) { + mlog_errno(status); + goto leave; + } + insert_inode_hash(inode); dentry->d_op = &ocfs2_dentry_ops; d_instantiate(dentry, inode); @@ -725,6 +754,13 @@ static int ocfs2_link(struct dentry *old_dentry, goto bail; } + err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno, + 0); + if (err) { + mlog_errno(err); + goto bail; + } + atomic_inc(&inode->i_count); dentry->d_op = &ocfs2_dentry_ops; d_instantiate(dentry, inode); @@ -743,6 +779,23 @@ bail: return err; } +/* + * Takes and drops an exclusive lock on the given dentry. This will + * force other nodes to drop it. + */ +static int ocfs2_remote_dentry_delete(struct dentry *dentry) +{ + int ret; + + ret = ocfs2_dentry_lock(dentry, 1); + if (ret) + mlog_errno(ret); + else + ocfs2_dentry_unlock(dentry, 1); + + return ret; +} + static int ocfs2_unlink(struct inode *dir, struct dentry *dentry) { @@ -832,8 +885,7 @@ static int ocfs2_unlink(struct inode *dir, else inode->i_nlink--; - status = ocfs2_request_unlink_vote(inode, dentry, - (unsigned int) inode->i_nlink); + status = ocfs2_remote_dentry_delete(dentry); if (status < 0) { /* This vote should succeed under all normal * circumstances. */ @@ -1019,7 +1071,6 @@ static int ocfs2_rename(struct inode *old_dir, struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, // this is the 1st dirent bh nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink; - unsigned int links_count; /* At some point it might be nice to break this function up a * bit. */ @@ -1093,23 +1144,26 @@ static int ocfs2_rename(struct inode *old_dir, } } - if (S_ISDIR(old_inode->i_mode)) { - /* Directories actually require metadata updates to - * the directory info so we can't get away with not - * doing node locking on it. */ - status = ocfs2_meta_lock(old_inode, handle, NULL, 1); - if (status < 0) { - if (status != -ENOENT) - mlog_errno(status); - goto bail; - } - - status = ocfs2_request_rename_vote(old_inode, old_dentry); - if (status < 0) { + /* + * Though we don't require an inode meta data update if + * old_inode is not a directory, we lock anyway here to ensure + * the vote thread on other nodes won't have to concurrently + * downconvert the inode and the dentry locks. + */ + status = ocfs2_meta_lock(old_inode, handle, NULL, 1); + if (status < 0) { + if (status != -ENOENT) mlog_errno(status); - goto bail; - } + goto bail; + } + + status = ocfs2_remote_dentry_delete(old_dentry); + if (status < 0) { + mlog_errno(status); + goto bail; + } + if (S_ISDIR(old_inode->i_mode)) { status = -EIO; old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0); if (!old_inode_de_bh) @@ -1123,14 +1177,6 @@ static int ocfs2_rename(struct inode *old_dir, if (!new_inode && new_dir!=old_dir && new_dir->i_nlink >= OCFS2_LINK_MAX) goto bail; - } else { - /* Ah, the simple case - we're a file so just send a - * message. */ - status = ocfs2_request_rename_vote(old_inode, old_dentry); - if (status < 0) { - mlog_errno(status); - goto bail; - } } status = -ENOENT; @@ -1202,13 +1248,7 @@ static int ocfs2_rename(struct inode *old_dir, goto bail; } - if (S_ISDIR(new_inode->i_mode)) - links_count = 0; - else - links_count = (unsigned int) (new_inode->i_nlink - 1); - - status = ocfs2_request_unlink_vote(new_inode, new_dentry, - links_count); + status = ocfs2_remote_dentry_delete(new_dentry); if (status < 0) { mlog_errno(status); goto bail; @@ -1387,6 +1427,7 @@ static int ocfs2_rename(struct inode *old_dir, } } + ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); status = 0; bail: if (rename_lock) @@ -1675,6 +1716,13 @@ static int ocfs2_symlink(struct inode *dir, goto bail; } + status = ocfs2_dentry_attach_lock(dentry, inode, + OCFS2_I(dir)->ip_blkno, 1); + if (status) { + mlog_errno(status); + goto bail; + } + insert_inode_hash(inode); dentry->d_op = &ocfs2_dentry_ops; d_instantiate(dentry, inode); |
