kernel/include/linux/nfs_page.h, branch linux-5.11.y

pNFS/flexfiles: Fix array overflow when flexfiles mirroring is enabled

2020-11-30T15:52:22Z

If the flexfiles mirroring is enabled, then the read code expects to be able to set pgio->pg_mirror_idx to point to the data server that is being used for this particular read. However it does not change the pg_mirror_count because we only need to send a single read. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFS: Try to join page groups before an O_DIRECT retransmission

2020-04-01T17:37:57Z

If we have to retransmit requests, try to join their page groups first. Signed-off-by: Trond Myklebust

NFS: Refactor nfs_lock_and_join_requests()

2020-04-01T17:37:56Z

Refactor nfs_lock_and_join_requests() in order to separate out the subrequest merging into its own function nfs_lock_and_join_group() that can be used by O_DIRECT. Signed-off-by: Trond Myklebust

NFS: Clean up nfs_lock_and_join_requests()

2020-04-01T17:37:56Z

Clean up nfs_lock_and_join_requests() to simplify the calculation of the range covered by the page group, taking into account the presence of mirrors. Signed-off-by: Trond Myklebust

NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()

2020-04-01T17:34:28Z

When a subrequest is being detached from the subgroup, we want to ensure that it is not holding the group lock, or in the process of waiting for the group lock. Fixes: 5b2b5187fa85 ("NFS: Fix nfs_page_group_destroy() and nfs_lock_and_join_requests() race cases") Signed-off-by: Trond Myklebust

NFS: Remove redundant open context from nfs_page

2019-04-25T18:18:15Z

The lock context already references and tracks the open context, so take the opportunity to save some space in struct nfs_page. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFS: Add a helper to return a pointer to the open context of a struct nfs_page

2019-04-25T18:18:15Z

Add a helper for when we remove the explicit pointer to the open context. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

pNFS: Add tracking to limit the number of pNFS retries

2019-04-25T18:18:14Z

When the client is reading or writing using pNFS, and hits an error on the DS, then it typically sends a LAYOUTERROR and/or LAYOUTRETURN to the MDS, before redirtying the failed pages, and going for a new round of reads/writebacks. The problem is that if the server has no way to fix the DS, then we may need a way to interrupt this loop after a set number of attempts have been made. This patch adds an optional module parameter that allows the admin to specify how many times to retry the read/writeback process before failing with a fatal error. The default behaviour is to retry forever. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFS: Remove unused argument from nfs_create_request()

2019-04-25T18:18:14Z

All the callers of nfs_create_request() are now creating page group heads, so we can remove the redundant 'last' page argument. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFS: Clean up list moves of struct nfs_page

2019-02-20T20:14:20Z

In several places we're just moving the struct nfs_page from one list to another by first removing from the existing list, then adding to the new one. Signed-off-by: Trond Myklebust