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authorRichard Weinberger <richard@nod.at>2015-03-02 00:09:33 +0100
committerRichard Weinberger <richard@nod.at>2015-03-26 23:27:48 +0100
commit4c6dcafc691bbd1e3258b623121d8859d3213ae9 (patch)
treeda299aa878b61b977bd501d0cfcc481ddcb49121 /fs
parenthostfs: hostfs_file_open: Fix a fd leak in hostfs_file_open (diff)
downloadlinux-4c6dcafc691bbd1e3258b623121d8859d3213ae9.tar.xz
linux-4c6dcafc691bbd1e3258b623121d8859d3213ae9.zip
hostfs: Allow fsync on directories
Historically hostfs did not open directories on the host filesystem for performance and memory reasons. But it turned out that this optimization has a drawback. Calling fsync() on a hostfs directory returns immediately with -EINVAL as fsync is not implemented. While this is behavior is strictly speaking correct common userspace like dpkg(1) stumbles over that and makes it impossible to use hostfs as root filesystem. The fix is easy, wire up the existing host open/fsync functions to the directory file operations. Reported-by: Daniel Gröber <dxld@darkboxed.org> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs')
-rw-r--r--fs/hostfs/hostfs_kern.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 112ba5aa0848..92b008f564a4 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -295,7 +295,7 @@ static int hostfs_readdir(struct file *file, struct dir_context *ctx)
return 0;
}
-static int hostfs_file_open(struct inode *ino, struct file *file)
+static int hostfs_open(struct inode *ino, struct file *file)
{
char *name;
fmode_t mode = 0;
@@ -386,7 +386,7 @@ static const struct file_operations hostfs_file_fops = {
.write_iter = generic_file_write_iter,
.write = new_sync_write,
.mmap = generic_file_mmap,
- .open = hostfs_file_open,
+ .open = hostfs_open,
.release = hostfs_file_release,
.fsync = hostfs_fsync,
};
@@ -395,6 +395,8 @@ static const struct file_operations hostfs_dir_fops = {
.llseek = generic_file_llseek,
.iterate = hostfs_readdir,
.read = generic_read_dir,
+ .open = hostfs_open,
+ .fsync = hostfs_fsync,
};
static int hostfs_writepage(struct page *page, struct writeback_control *wbc)