diff options
Diffstat (limited to 'fs/fuse/dir.c')
| -rw-r--r-- | fs/fuse/dir.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 26f028bc760b..c4a01290aec6 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1501,6 +1501,7 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, loff_t oldsize; int err; bool trust_local_cmtime = is_wb && S_ISREG(inode->i_mode); + bool fault_blocked = false; if (!fc->default_permissions) attr->ia_valid |= ATTR_FORCE; @@ -1509,6 +1510,22 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, if (err) return err; + if (attr->ia_valid & ATTR_SIZE) { + if (WARN_ON(!S_ISREG(inode->i_mode))) + return -EIO; + is_truncate = true; + } + + if (FUSE_IS_DAX(inode) && is_truncate) { + down_write(&fi->i_mmap_sem); + fault_blocked = true; + err = fuse_dax_break_layouts(inode, 0, 0); + if (err) { + up_write(&fi->i_mmap_sem); + return err; + } + } + if (attr->ia_valid & ATTR_OPEN) { /* This is coming from open(..., ... | O_TRUNC); */ WARN_ON(!(attr->ia_valid & ATTR_SIZE)); @@ -1521,17 +1538,11 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, */ i_size_write(inode, 0); truncate_pagecache(inode, 0); - return 0; + goto out; } file = NULL; } - if (attr->ia_valid & ATTR_SIZE) { - if (WARN_ON(!S_ISREG(inode->i_mode))) - return -EIO; - is_truncate = true; - } - /* Flush dirty data/metadata before non-truncate SETATTR */ if (is_wb && S_ISREG(inode->i_mode) && attr->ia_valid & @@ -1614,6 +1625,10 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr, } clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state); +out: + if (fault_blocked) + up_write(&fi->i_mmap_sem); + return 0; error: @@ -1621,6 +1636,9 @@ error: fuse_release_nowrite(inode); clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state); + + if (fault_blocked) + up_write(&fi->i_mmap_sem); return err; } |