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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2018-11-30 12:32:38 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-12-04 08:50:49 -0800 |
| commit | 6744557b53a2b710ebce3736a5c27a0119685fcc (patch) | |
| tree | 0ac2f8aa8dbdb860b34faa7274e723004fff2b00 /fs/read_write.c | |
| parent | 7d048df4e9b05ba89b74d062df59498aa81f3785 (diff) | |
| download | lwn-6744557b53a2b710ebce3736a5c27a0119685fcc.tar.gz lwn-6744557b53a2b710ebce3736a5c27a0119685fcc.zip | |
vfs: allow some remap flags to be passed to vfs_clone_file_range
In overlayfs, ovl_remap_file_range calls vfs_clone_file_range on the
lower filesystem's inode, passing through whatever remap flags it got
from its caller. Since vfs_copy_file_range first tries a filesystem's
remap function with REMAP_FILE_CAN_SHORTEN, this can get passed through
to the second vfs_copy_file_range call, and this isn't an issue.
Change the WARN_ON to look only for the DEDUP flag.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 4dae0399c75a..58f30537c47a 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1956,7 +1956,7 @@ loff_t do_clone_file_range(struct file *file_in, loff_t pos_in, struct inode *inode_out = file_inode(file_out); loff_t ret; - WARN_ON_ONCE(remap_flags); + WARN_ON_ONCE(remap_flags & REMAP_FILE_DEDUP); if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode)) return -EISDIR; |