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| author | Luis Henriques <lhenriques@suse.com> | 2018-10-15 18:46:00 +0300 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-10-22 11:28:24 +0300 |
| commit | ea4cdc548e5e74a529cdd1aea885d74b4aa8f1b3 (patch) | |
| tree | 91479813e43c1b0a21322a29a1b1d190cf8bc98b /Documentation/filesystems/ceph.txt | |
| parent | 503f82a9932d311c12430779627f7a130bbe462a (diff) | |
| download | linux-ea4cdc548e5e74a529cdd1aea885d74b4aa8f1b3.tar.xz | |
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 'Documentation/filesystems/ceph.txt')
| -rw-r--r-- | Documentation/filesystems/ceph.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/filesystems/ceph.txt b/Documentation/filesystems/ceph.txt index 8bf62240e10d..1177052701e1 100644 --- a/Documentation/filesystems/ceph.txt +++ b/Documentation/filesystems/ceph.txt @@ -151,6 +151,11 @@ Mount Options Report overall filesystem usage in statfs instead of using the root directory quota. + nocopyfrom + Don't use the RADOS 'copy-from' operation to perform remote object + copies. Currently, it's only used in copy_file_range, which will revert + to the default VFS implementation if this option is used. + More Information ================ |