pm24.git/include/linux/ceph, branch v4.18-rc2

libceph: allocate the locator string with GFP_NOFAIL

2018-06-04T18:46:00Z

calc_target() isn't supposed to fail with anything but POOL_DNE, in which case we report that the pool doesn't exist and fail the request with -ENOENT. Doing this for -ENOMEM is at the very least confusing and also harmful -- as the preceding requests complete, a short-lived locator string allocation is likely to succeed after a wait. (We used to call ceph_object_locator_to_pg() for a pi lookup. In theory that could fail with -ENOENT, hence the "ret != -ENOENT" warning being removed.) Signed-off-by: Ilya Dryomov

libceph: make abort_on_full a per-osdc setting

2018-06-04T18:46:00Z

The intent behind making it a per-request setting was that it would be set for writes, but not for reads. As it is, the flag is set for all fs/ceph requests except for pool perm check stat request (technically a read). ceph_osdc_abort_on_full() skips reads since the previous commit and I don't see a use case for marking individual requests. Signed-off-by: Ilya Dryomov Acked-by: Jeff Layton Reviewed-by: "Yan, Zheng"

libceph: defer __complete_request() to a workqueue

2018-06-04T18:45:58Z

In the common case, req->r_callback is called by handle_reply() on the ceph-msgr worker thread without any locks. If handle_reply() fails, it is called with both osd->lock and osdc->lock. In the map check case, it is called with just osdc->lock but held for write. Finally, if the request is aborted because of -ENOSPC or by ceph_osdc_abort_requests(), it is called directly on the submitter's thread, again with both locks. req->r_callback on the submitter's thread is relatively new (introduced in 4.12) and ripe for deadlocks -- e.g. writeback worker thread waiting on itself: inode_wait_for_writeback+0x26/0x40 evict+0xb5/0x1a0 iput+0x1d2/0x220 ceph_put_wrbuffer_cap_refs+0xe0/0x2c0 [ceph] writepages_finish+0x2d3/0x410 [ceph] __complete_request+0x26/0x60 [libceph] complete_request+0x2e/0x70 [libceph] __submit_request+0x256/0x330 [libceph] submit_request+0x2b/0x30 [libceph] ceph_osdc_start_request+0x25/0x40 [libceph] ceph_writepages_start+0xdfe/0x1320 [ceph] do_writepages+0x1f/0x70 __writeback_single_inode+0x45/0x330 writeback_sb_inodes+0x26a/0x600 __writeback_inodes_wb+0x92/0xc0 wb_writeback+0x274/0x330 wb_workfn+0x2d5/0x3b0 Defer __complete_request() to a workqueue in all failure cases so it's never on the same thread as ceph_osdc_start_request() and always called with no locks held. Link: http://tracker.ceph.com/issues/23978 Signed-off-by: Ilya Dryomov Acked-by: Jeff Layton Reviewed-by: "Yan, Zheng"

libceph: introduce ceph_osdc_abort_requests()

2018-06-04T18:45:57Z

This will be used by the filesystem for "umount -f". Signed-off-by: Ilya Dryomov

ceph: always get rstat from auth mds

2018-06-04T18:45:55Z

rstat is not tracked by capability. client can't know if rstat from non-auth mds is uptodate or not. Link: http://tracker.ceph.com/issues/23538 Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

libceph, rbd: add error handling for osd_req_op_cls_init()

2018-06-04T18:45:54Z

Add proper error handling for osd_req_op_cls_init() to replace BUG_ON statement when failing from memory allocation. Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov

libceph: add osd_req_op_extent_osd_data_bvecs()

2018-05-10T08:15:05Z

... and store num_bvecs for client code's convenience. Signed-off-by: Ilya Dryomov Reviewed-by: Jeff Layton Reviewed-by: "Yan, Zheng"

ceph: quota: add initial infrastructure to support cephfs quotas

2018-04-02T09:17:51Z

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: optimize memory usage

2018-04-02T08:12:49Z

In current code, regular file and directory use same struct ceph_file_info to store fs specific data so the struct has to include some fields which are only used for directory (e.g., readdir related info), when having plenty of regular files, it will lead to memory waste. This patch introduces dedicated ceph_dir_file_info cache for readdir related thins. So that regular file does not include those unused fields anymore. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov

libceph, ceph: move ceph_calc_file_object_mapping() to striper.c

2018-04-02T08:12:43Z

ceph_calc_file_object_mapping() has nothing to do with osdmaps. Signed-off-by: Ilya Dryomov