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| author |   Luis Henriques <lhenriques@suse.com> | 2018-10-15 16:46:00 +0100 |
|---|---|---|
| committer |   Ilya Dryomov <idryomov@gmail.com> | 2018-10-22 10:28:24 +0200 |
| commit | ea4cdc548e5e74a529cdd1aea885d74b4aa8f1b3 (patch) | |
| tree | 91479813e43c1b0a21322a29a1b1d190cf8bc98b /fs/ceph/file.c | |
| parent | ceph: support copy_file_range file operation (diff) | |
| download | linux-dev-ea4cdc548e5e74a529cdd1aea885d74b4aa8f1b3.tar.xz linux-dev-ea4cdc548e5e74a529cdd1aea885d74b4aa8f1b3.zip | |
ceph: new mount option to disable usage of copy-from op
Add a new mount option 'nocopyfrom' that will prevent the usage of the
RADOS 'copy-from' operation in cephfs. This could be useful, for example,
for an administrator to temporarily mitigate any possible bugs in the
'copy-from' implementation.
Currently, only copy_file_range uses this RADOS operation. Setting this
mount option will result in this syscall reverting to the default VFS
implementation, i.e. to perform the copies locally instead of doing remote
object copies.
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/file.c')
| -rw-r--r-- | fs/ceph/file.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 5557ec6760ea..f788496fafcc 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1917,6 +1917,9 @@ static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, * efficient). */ + if (ceph_test_mount_opt(ceph_inode_to_client(src_inode), NOCOPYFROM)) + return -EOPNOTSUPP; + if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || (src_ci->i_layout.stripe_count != dst_ci->i_layout.stripe_count) || (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) |