diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/adfs/dir.c | 55 |
1 files changed, 29 insertions, 26 deletions
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c index e8aafc65d545..ff9c921be31c 100644 --- a/fs/adfs/dir.c +++ b/fs/adfs/dir.c @@ -12,7 +12,7 @@ /* * For future. This should probably be per-directory. */ -static DEFINE_RWLOCK(adfs_dir_lock); +static DECLARE_RWSEM(adfs_dir_rwsem); int adfs_dir_copyfrom(void *dst, struct adfs_dir *dir, unsigned int offset, size_t len) @@ -232,26 +232,25 @@ adfs_readdir(struct file *file, struct dir_context *ctx) if (ctx->pos >> 32) return 0; + down_read(&adfs_dir_rwsem); ret = adfs_dir_read_inode(sb, inode, &dir); if (ret) - return ret; + goto unlock; if (ctx->pos == 0) { if (!dir_emit_dot(file, ctx)) - goto free_out; + goto unlock_relse; ctx->pos = 1; } if (ctx->pos == 1) { if (!dir_emit(ctx, "..", 2, dir.parent_id, DT_DIR)) - goto free_out; + goto unlock_relse; ctx->pos = 2; } - read_lock(&adfs_dir_lock); - ret = ops->setpos(&dir, ctx->pos - 2); if (ret) - goto unlock_out; + goto unlock_relse; while (ops->getnext(&dir, &obj) == 0) { if (!dir_emit(ctx, obj.name, obj.name_len, obj.indaddr, DT_UNKNOWN)) @@ -259,12 +258,14 @@ adfs_readdir(struct file *file, struct dir_context *ctx) ctx->pos++; } -unlock_out: - read_unlock(&adfs_dir_lock); - -free_out: +unlock_relse: + up_read(&adfs_dir_rwsem); adfs_dir_relse(&dir); return ret; + +unlock: + up_read(&adfs_dir_rwsem); + return ret; } int @@ -281,13 +282,13 @@ adfs_dir_update(struct super_block *sb, struct object_info *obj, int wait) if (!ops->update) return -EINVAL; + down_write(&adfs_dir_rwsem); ret = adfs_dir_read(sb, obj->parent_id, 0, &dir); if (ret) - goto out; + goto unlock; - write_lock(&adfs_dir_lock); ret = ops->update(&dir, obj); - write_unlock(&adfs_dir_lock); + up_write(&adfs_dir_rwsem); if (ret == 0) adfs_dir_mark_dirty(&dir); @@ -299,7 +300,10 @@ adfs_dir_update(struct super_block *sb, struct object_info *obj, int wait) } adfs_dir_relse(&dir); -out: + return ret; + +unlock: + up_write(&adfs_dir_rwsem); #endif return ret; } @@ -336,17 +340,14 @@ static int adfs_dir_lookup_byname(struct inode *inode, const struct qstr *qstr, u32 name_len; int ret; + down_read(&adfs_dir_rwsem); ret = adfs_dir_read_inode(sb, inode, &dir); if (ret) - goto out; - - obj->parent_id = inode->i_ino; - - read_lock(&adfs_dir_lock); + goto unlock; ret = ops->setpos(&dir, 0); if (ret) - goto unlock_out; + goto unlock_relse; ret = -ENOENT; name = qstr->name; @@ -357,13 +358,15 @@ static int adfs_dir_lookup_byname(struct inode *inode, const struct qstr *qstr, break; } } + obj->parent_id = inode->i_ino; -unlock_out: - read_unlock(&adfs_dir_lock); - -free_out: +unlock_relse: + up_read(&adfs_dir_rwsem); adfs_dir_relse(&dir); -out: + return ret; + +unlock: + up_read(&adfs_dir_rwsem); return ret; } |