diff options
Diffstat (limited to 'fs/configfs/dir.c')
| -rw-r--r-- | fs/configfs/dir.c | 37 |
1 files changed, 16 insertions, 21 deletions
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index ea59c891fc53..56fb26127fef 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -494,7 +494,7 @@ out: * If there is an error, the caller will reset the flags via * configfs_detach_rollback(). */ -static int configfs_detach_prep(struct dentry *dentry, struct mutex **wait_mutex) +static int configfs_detach_prep(struct dentry *dentry, struct dentry **wait) { struct configfs_dirent *parent_sd = dentry->d_fsdata; struct configfs_dirent *sd; @@ -515,8 +515,8 @@ static int configfs_detach_prep(struct dentry *dentry, struct mutex **wait_mutex if (sd->s_type & CONFIGFS_USET_DEFAULT) { /* Abort if racing with mkdir() */ if (sd->s_type & CONFIGFS_USET_IN_MKDIR) { - if (wait_mutex) - *wait_mutex = &d_inode(sd->s_dentry)->i_mutex; + if (wait) + *wait= dget(sd->s_dentry); return -EAGAIN; } @@ -524,7 +524,7 @@ static int configfs_detach_prep(struct dentry *dentry, struct mutex **wait_mutex * Yup, recursive. If there's a problem, blame * deep nesting of default_groups */ - ret = configfs_detach_prep(sd->s_dentry, wait_mutex); + ret = configfs_detach_prep(sd->s_dentry, wait); if (!ret) continue; } else @@ -1458,7 +1458,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry) * the new link is temporarily attached */ do { - struct mutex *wait_mutex; + struct dentry *wait; mutex_lock(&configfs_symlink_mutex); spin_lock(&configfs_dirent_lock); @@ -1469,7 +1469,7 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry) */ ret = sd->s_dependent_count ? -EBUSY : 0; if (!ret) { - ret = configfs_detach_prep(dentry, &wait_mutex); + ret = configfs_detach_prep(dentry, &wait); if (ret) configfs_detach_rollback(dentry); } @@ -1483,8 +1483,9 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry) } /* Wait until the racing operation terminates */ - mutex_lock(wait_mutex); - mutex_unlock(wait_mutex); + inode_lock(d_inode(wait)); + inode_unlock(d_inode(wait)); + dput(wait); } } while (ret == -EAGAIN); @@ -1632,11 +1633,9 @@ static int configfs_readdir(struct file *file, struct dir_context *ctx) if (!dir_emit_dots(file, ctx)) return 0; - if (ctx->pos == 2) { - spin_lock(&configfs_dirent_lock); + spin_lock(&configfs_dirent_lock); + if (ctx->pos == 2) list_move(q, &parent_sd->s_children); - spin_unlock(&configfs_dirent_lock); - } for (p = q->next; p != &parent_sd->s_children; p = p->next) { struct configfs_dirent *next; const char *name; @@ -1647,9 +1646,6 @@ static int configfs_readdir(struct file *file, struct dir_context *ctx) if (!next->s_element) continue; - name = configfs_get_name(next); - len = strlen(name); - /* * We'll have a dentry and an inode for * PINNED items and for open attribute @@ -1663,7 +1659,6 @@ static int configfs_readdir(struct file *file, struct dir_context *ctx) * they close it. Beyond that, we don't * care. */ - spin_lock(&configfs_dirent_lock); dentry = next->s_dentry; if (dentry) inode = d_inode(dentry); @@ -1673,15 +1668,18 @@ static int configfs_readdir(struct file *file, struct dir_context *ctx) if (!inode) ino = iunique(sb, 2); + name = configfs_get_name(next); + len = strlen(name); + if (!dir_emit(ctx, name, len, ino, dt_type(next))) return 0; spin_lock(&configfs_dirent_lock); list_move(q, p); - spin_unlock(&configfs_dirent_lock); p = q; ctx->pos++; } + spin_unlock(&configfs_dirent_lock); return 0; } @@ -1689,7 +1687,6 @@ static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence) { struct dentry * dentry = file->f_path.dentry; - inode_lock(d_inode(dentry)); switch (whence) { case 1: offset += file->f_pos; @@ -1697,7 +1694,6 @@ static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence) if (offset >= 0) break; default: - inode_unlock(d_inode(dentry)); return -EINVAL; } if (offset != file->f_pos) { @@ -1723,7 +1719,6 @@ static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence) spin_unlock(&configfs_dirent_lock); } } - inode_unlock(d_inode(dentry)); return offset; } @@ -1732,7 +1727,7 @@ const struct file_operations configfs_dir_operations = { .release = configfs_dir_close, .llseek = configfs_dir_lseek, .read = generic_read_dir, - .iterate = configfs_readdir, + .iterate_shared = configfs_readdir, }; /** |