kernel/git/stable/linux.git/Documentation/filesystems/ceph.txt, branch master

docs: filesystems: convert ceph.txt to ReST

2020-03-02T21:01:53+00:00

- Add a SPDX header; - Adjust document title; - Some whitespace fixes and new line breaks; - Mark literal blocks as such; - Add it to filesystems/index.rst. Signed-off-by: Mauro Carvalho Chehab Acked-by: Jeff Layton Link: https://lore.kernel.org/r/df2f142b5ca5842e030d8209482dfd62dcbe020f.1581955849.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet

ceph: auto reconnect after blacklisted

2019-09-16T10:06:24+00:00

Make client use osd reply and session message to infer if itself is blacklisted. Client reconnect to cluster using new entity addr if it is blacklisted. Auto reconnect is limited to once every 30 minutes. Auto reconnect is disabled by default. It can be enabled/disabled by recover_session= mount option. In 'clean' mode, client drops any dirty data/metadata, invalidates page caches and invalidates all writable file handles. After reconnect, file locks become stale because MDS loses track of them. If an inode contains any stale file locks, read/write on the indoe are not allowed until applications release all stale file locks. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

Documentation: modern versions of ceph are not backed by btrfs

2019-03-05T17:55:18+00:00

[ Update the links too. ] Signed-off-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: add mount option to limit caps count

2019-03-05T17:55:17+00:00

If number of caps exceed the limit, ceph_trim_dentires() also trim dentries with valid leases. Trimming dentry releases references to associated inode, which may evict inode and release caps. By default, there is no limit for caps count. Signed-off-by: "Yan, Zheng" Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov

ceph: new mount option to disable usage of copy-from op

2018-10-22T08:28:24+00:00

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 Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: update description of some mount options

2018-06-04T18:46:02+00:00

Based on code, default value of rsize/wsize is 16 MB. Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov

ceph: quota: report root dir quota usage in statfs

2018-04-02T09:17:53+00:00

This commit changes statfs default behaviour when reporting usage statistics. Instead of using the overall filesystem usage, statfs now reports the quota for the filesystem root, if ceph.quota.max_bytes has been set for this inode. If quota hasn't been set, it falls back to the old statfs behaviour. A new mount option is also added ('noquotadf') to disable this behaviour. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: quota: add initial infrastructure to support cephfs quotas

2018-04-02T09:17:51+00:00

This patch adds the infrastructure required to support cephfs quotas as it is currently implemented in the ceph fuse client. Cephfs quotas can be set on any directory, and can restrict the number of bytes or the number of files stored beneath that point in the directory hierarchy. Quotas are set using the extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', and can be removed by setting these attributes to '0'. Link: http://tracker.ceph.com/issues/22372 Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

ceph: set io_pages bdi hint

2017-02-20T11:16:05+00:00

This patch sets the io_pages bdi hint based on the rsize mount option. Without this patch large buffered reads (request size > max readahead) are processed sequentially in chunks of the readahead size (i.e. read requests are sent out up to the readahead size, then the do_generic_file_read() function waits until the first page is received). With this patch read requests are sent out at once up to the size specified in the rsize mount option (default: 64 MB). Signed-off-by: Andreas Gerstmayr Acked-by: Jeff Layton Signed-off-by: Yan, Zheng

ceph: fix description for rsize and rasize mount options

2016-10-03T14:13:50+00:00

Signed-off-by: Andreas Gerstmayr Signed-off-by: Ilya Dryomov