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* | nfs41: open sequence setup/done supportAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Separate nfs4_open calls from nfs41: sequence setup/done support Call nfs4_sequence_done from respective rpc_call_done methods. Note that we need to pass a pointer to the nfs_server in calls data for passing on to nfs4_sequence_done. Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [pnfs: client data server write validate and release] [use nfs4_sequence_done_free_slot] Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: close sequence setup/done supportAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Separate nfs4_close calls from nfs41: sequence setup/done support Call nfs4_sequence_done from respective rpc_call_done methods. Note that we need to pass a pointer to the nfs_server in calls data for passing on to nfs4_sequence_done. Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [pnfs: client data server write validate and release] Signed-off-by: Andy Adamson<andros@umich.edu> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: separate free slot from sequence done] [nfs41: sequence res use slotid] [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: nfs41_call_sync_doneAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement nfs4.1 synchronous rpc_call_done method that essentially just calls nfs4_sequence_done, that turns around and calls nfs41_sequence_done for minorversion1 rpcs. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move adding nfs4_sequence_free_slot from nfs41-separate-free-slot-from-sequence-done] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: nfs41_sequence_doneAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Handle session level errors, update slot sequence id and sessions bookeeping, free slot. [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: bail out early out of nfs41_sequence_done if !res->sr_session] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [move nfs4_sequence_done from nfs41: nfs41_call_sync_done] Signed-off-by: Andy Adamson <andros@netapp.com> [move nfs4_sequence_free_slot from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved reset sr_slotid to nfs41_sequence_free_slot] [free slot also on unexpectecd error] [remove seq_res.sr_session member, use nfs_client's instead] [ditch seq_res.sr_flags until used] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [look at sr_slotid for bailing out early from nfs41_sequence_done] [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unused error checking in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs4_has_session check in nfs41_sequence_done] Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: remove nfs_client pointer check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: nfs41_sequence_free_slotAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [from nfs41: separate free slot from sequence done] Don't free the slot until after all rpc_restart_calls have completed. Session reset will require more work. As noted by Trond, since we're using rpc_wake_up_next rather than rpc_wake_up() we must always wake up the next task in the queue either by going through nfs4_free_slot, or just calling rpc_wake_up_next if no slot is to be freed. [nfs41: sequence res use slotid] [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] [got rid of nfs4_sequence_res.sr_session, use nfs_client.cl_session instead] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_wake_up_next if sessions slot was not consumed.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_sequence_free_slot use nfs_client for data server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: free slotAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Free a slot in the slot table. Mark the slot as free in the bitmap-based allocation table by clearing a bit corresponding to the slotid. Update lowest_free_slotid if freed slotid is lower than that. Update highest_used_slotid. In the case the freed slotid equals the highest_used_slotid, scan downwards for the next highest used slotid using the optimized fls* functions. Finally, wake up thread waiting on slot_tbl_waitq for a free slot to become available. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: free slot use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_first_zero_bit for nfs4_find_slot] While at it, obliterate lowest_free_slotid and fix-up related comments. As per review comment 21/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use __clear_bit for nfs4_free_slot] While at it, fix-up function comment. Part of review comment 22/85. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: use find_last_bit in nfs4_free_slot to determine highest used slot.] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: setup_sequence methodAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allocate a slot in the session slot table and set the sequence op arguments. Called at the rpc prepare stage. Add a status to nfs41_sequence_res, initialize it to one so that we catch rpc level failures which do not go through decode_sequence which sets the new status field. Note that upon an rpc level failure, we don't know if the server processed the sequence operation or not. Proceed as if the server did process the sequence operation. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence args use slotid] [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove SEQ4_STATUS_USE_TK_STATUS] As per 11-14-08 review [move extern declaration from nfs41: sequence setup/done support] [removed sa_session definition, changed sa_cache_this into a u8 to reduce footprint] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Otherwise there's a race (we've hit) with nfs4_free_slot where nfs41_setup_sequence sees a full slot table, unlocks slot_tbl_lock, nfs4_free_slots happen concurrently and call rpc_wake_up_next where there's nobody to wake up yet, context goes back to nfs41_setup_sequence which goes to sleep when the slot table is actually empty now and there's no-one to wake it up anymore. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: find slotBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Find a free slot using bitmap-based allocation. Use the optimized ffz function to find a zero bit in the bitmap that indicates a free slot, starting the search from the 'lowest_free_slotid' position. If found, mark the slot as used in the bitmap, get the slot's slotid and seqid, and update max_slotid to be used by the SEQUENCE operation. Also, update lowest_free_slotid for next search. If no free slot was found the caller has to wait for a free slot (outside the scope of this function) Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: find slot return slotid] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [use find_first_zero_bit for nfs4_find_slot as per review comment 21/85.] [use NFS4_MAX_SLOT_TABLE rather than NFS4_NO_SLOT] [nfs41: rpc_sleep_on slot_tbl_waitq must be called under slot_tbl_lock] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: nfs4_setup_sequenceAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Perform the nfs4_setup_sequence in the rpc_call_prepare state. If a session slot is not available, we will rpc_sleep_on the slot wait queue leaving the tk_action as rpc_call_prepare. Once we have a session slot, hang on to it even through rpc_restart_calls. Ensure the nfs41_sequence_res sr_slot pointer is NULL before rpc_run_task is called as nfs41_setup_sequence will only find a new slot if it is NULL. A future patch will call free slot after any rpc_restart_calls, and handle the rpc restart that result from a sequence operation error. Signed-off-by: Rahul Iyer <iyer@netapp.com> [nfs41: sequence res use slotid] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: simplify nfs4_call_sync] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] [nfs41: check for session not minorversion] [nfs41: remove rpc_message from nfs41_call_sync_args] [moved NFS4_MAX_SLOT_TABLE logic into nfs41_setup_sequence] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs41_call_sync_data use nfs_client not nfs_server] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: expose nfs4_call_sync_session for lease renewal] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: remove unnecessary return check] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: set up seq_res.sr_slotidAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | Initialize nfs4_sequence_res sr_slotid to NFS4_MAX_SLOT_TABLE. [was nfs41: sequence res use slotid] Signed-off-by: Andy Adamson <andros@netapp.com> [pulled definition of struct nfs4_sequence_res.sr_slotid to here] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: nfs41: pass *session in seq_args and seq_resBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | To be used for getting the rpc's minorversion and for nfs41 xdr {en,de}coding of the sequence operation. Reset the seq session ptrs for minorversion=0 rpc calls. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: introduce nfs4_call_syncAndy Adamson2009-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use nfs4_call_sync rather than rpc_call_sync to provide for a nfs41 sessions-enabled interface for sessions manipulation. The nfs41 rpc logic uses the rpc_call_prepare method to recover and create the session, as well as selecting a free slot id and the rpc_call_done to free the slot and update slot table related metadata. In the coming patches we'll add rpc prepare and done routines for setting up the sequence op and processing the sequence result. Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: nfs4_call_sync] As per 11-14-08 review. Squash into "nfs41: introduce nfs4_call_sync" and "nfs41: nfs4_setup_sequence" Define two functions one for v4 and one for v41 add a pointer to struct nfs4_client to the correct one. Signed-off-by: Andy Adamson <andros@netapp.com> [added BUG() in _nfs4_call_sync_session if !CONFIG_NFS_V4_1] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: check for session not minorversion] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [group minorversion specific stuff together] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_init_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [cleaned-up patch: got rid of nfs_call_sync_t, dprintks, cosmetics, extra server defs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_fs_locations_resBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [find nfs4_fs_locations_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_setaclresBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [define nfs_setaclres] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_getaclresBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: embed resp_len in nfs_getaclres] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_pathconf_resBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [define nfs4_pathconf_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_fsinfo_resBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [define nfs4_fsinfo_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_statfs_resBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [define nfs4_statfs_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_readlink_resBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [define nfs4_readlink_res] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: use nfs4_server_caps_argBenny Halevy2009-06-17
| | | | | | | | | | | | | | | | | | In preparation for nfs41 sequence processing. Signed-off-by: Andy Admason <andros@netapp.com> [define nfs4_server_caps_arg] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs41: sessions client infrastructureAndy Adamson2009-06-17
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NFSv4.1 Sessions basic data types, initialization, and destruction. The session is always associated with a struct nfs_client that holds the exchange_id results. Signed-off-by: Rahul Iyer <iyer@netapp.com> Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [remove extraneous rpc_clnt pointer, use the struct nfs_client cl_rpcclient. remove the rpc_clnt parameter from nfs4 nfs4_init_session] Signed-off-by: Andy Adamson<andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Use the presence of a session to determine behaviour instead of the minorversion number.] Signed-off-by: Andy Adamson <andros@netapp.com> [constified nfs4_has_session's struct nfs_client parameter] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Rename nfs4_put_session() to nfs4_destroy_session() and call it from nfs4_free_client() not nfs4_free_server(). Also get rid of nfs4_get_session() and the ref_count in nfs4_session struct as keeping track of nfs_client should be sufficient] Signed-off-by: Alexandros Batsakis <Alexandros.Batsakis@netapp.com> [nfs41: pass rsize and wsize into nfs4_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> [separated out removal of rpc_clnt parameter from nfs4_init_session ot a patch of its own] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Pass the nfs_client pointer into nfs4_alloc_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: don't assign to session->clp->cl_session in nfs4_destroy_session] [nfs41: fixup nfs4_clear_client_minor_version] [introduce nfs4_clear_client_minor_version() in this patch] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [Refactor nfs4_init_session] Moved session allocation into nfs4_init_client_minor_version, called from nfs4_init_client. Leave rwise and wsize initialization in nfs4_init_session, called from nfs4_init_server. Reverted moving of nfs_fsid definition to nfs_fs_sb.h Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: Move NFS4_MAX_SLOT_TABLE define from under CONFIG_NFS_V4_1] [Fix comile error when CONFIG_NFS_V4_1 is not set.] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [moved nfs4_init_slot_table definition to "create_session operation"] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfs41: alloc session with GFP_KERNEL] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix the case where NFSv4 renewal failsTrond Myklebust2009-05-26
| | | | | | | | | If the asynchronous lease renewal fails (usually due to a soft timeout), then we _must_ schedule state recovery in order to ensure that we don't lose the lease unnecessarily or, if the lease is already lost, that we recover the locking state promptly... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2009-04-03
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: Remove two unneeded exports and make two symbols static in fs/mpage.c Cleanup after commit 585d3bc06f4ca57f975a5a1f698f65a45ea66225 Trim includes of fdtable.h Don't crap into descriptor table in binfmt_som Trim includes in binfmt_elf Don't mess with descriptor table in load_elf_binary() Get rid of indirect include of fs_struct.h New helper - current_umask() check_unsafe_exec() doesn't care about signal handlers sharing New locking/refcounting for fs_struct Take fs_struct handling to new file (fs/fs_struct.c) Get rid of bumping fs_struct refcount in pivot_root(2) Kill unsharing fs_struct in __set_personality()
| * New helper - current_umask()Al Viro2009-03-31
| | | | | | | | | | | | | | current->fs->umask is what most of fs_struct users are doing. Put that into a helper function. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | NFS: Optimise NFS close()Trond Myklebust2009-03-19
| | | | | | | | | | | | | | | | | | | | | | Close-to-open cache consistency rules really only require us to flush out writes on calls to close(), and require us to revalidate attributes on the very last close of the file. Currently we appear to be doing a lot of extra attribute revalidation and cache flushes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Throttle page dirtying while we're flushing to diskTrond Myklebust2009-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following patch is a combination of a patch by myself and Peter Staubach. Trond: If we allow other processes to dirty pages while a process is doing a consistency sync to disk, we can end up never making progress. Peter: Attached is a patch which addresses a continuing problem with the NFS client generating out of order WRITE requests. While this is compliant with all of the current protocol specifications, there are servers in the market which can not handle out of order WRITE requests very well. Also, this may lead to sub-optimal block allocations in the underlying file system on the server. This may cause the read throughputs to be reduced when reading the file from the server. Peter: There has been a lot of work recently done to address out of order issues on a systemic level. However, the NFS client is still susceptible to the problem. Out of order WRITE requests can occur when pdflush is in the middle of writing out pages while the process dirtying the pages calls generic_file_buffered_write which calls generic_perform_write which calls balance_dirty_pages_rate_limited which ends up calling writeback_inodes which ends up calling back into the NFS client to writes out dirty pages for the same file that pdflush happens to be working with. Signed-off-by: Peter Staubach <staubach@redhat.com> [modification by Trond to merge the two similar patches] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: Simplify some cache consistency post-op GETATTRsTrond Myklebust2009-03-11
| | | | | | | | | | | | | | | | | | | | | | Certain asynchronous operations such as write() do not expect (or care) that other metadata such as the file owner, mode, acls, ... change. All they want to do is update and/or check the change attribute, ctime, and mtime. By skipping the file owner and group update, we also avoid having to do a potential idmapper upcall for these asynchronous RPC calls. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: A referral is assumed to always point to a directory.Trond Myklebust2009-03-11
|/ | | | | | Fix a bug whereby we would fail to create a mount point for a referral. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* fs/nfs/nfs4proc.c: make nfs4_map_errors() staticWANG Cong2008-12-30
| | | | | | | | | | nfs4_map_errors() can become static. Signed-off-by: WANG Cong <wangcong@zeuux.org> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix an infinite loop in the NFS state recovery codeTrond Myklebust2008-12-23
| | | | | | | | | | | | | Marten Gajda <marten.gajda@fernuni-hagen.de> states: I tracked the problem down to the function nfs4_do_open_expired. Within this function _nfs4_open_expired is called and may return -NFS4ERR_DELAY. When a further call to _nfs4_open_expired is executed and does not return -NFS4ERR_DELAY the "exception.retry" variable is not reset to 0, causing the loop to iterate again (and as long as err != -NFS4ERR_DELAY, probably forever) Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Convert the open and close ops to use fmodeTrond Myklebust2008-12-23
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Return unreferenced delegations more promptlyTrond Myklebust2008-12-23
| | | | | | | | | If the client is not using a delegation, the right thing to do is to return it as soon as possible. This helps reduce the amount of state the server has to track, as well as reducing the potential for conflicts with other clients. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Rename the state reclaimer threadTrond Myklebust2008-12-23
| | | | | | It is really a more general purpose state management thread at this point. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Add recovery for individual stateidsTrond Myklebust2008-12-23
| | | | | | | | | | | | | | | NFSv4 defines a number of state errors which the client does not currently handle. Among those we should worry about are: NFS4ERR_ADMIN_REVOKED - the server's administrator revoked our locks and/or delegations. NFS4ERR_BAD_STATEID - the client and server are out of sync, possibly due to a delegation return racing with an OPEN request. NFS4ERR_OPENMODE - the client attempted to do something not sanctioned by the open mode of the stateid. Should normally just occur as a result of a delegation return race. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Remove nfs_client->cl_semTrond Myklebust2008-12-23
| | | | | | | | | | Now that we're using the flags to indicate state that needs to be recovered, as well as having implemented proper refcounting and spinlocking on the state and open_owners, we can get rid of nfs_client->cl_sem. The only remaining case that was dubious was the file locking, and that case is now covered by the nfsi->rwsem. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Ensure that file unlock requests don't conflict with state recoveryTrond Myklebust2008-12-23
| | | | | | | | | | The unlock path is currently failing to take the nfs_client->cl_sem read lock, and hence the recovery path may see locks disappear from underneath it. Also ensure that it takes the nfs_inode->rwsem read lock so that it there is no conflict with delegation recalls. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Remove the unnecessary argument to nfs4_wait_clnt_recover()Trond Myklebust2008-12-23
| | | | | | | ...and move some code around in order to clear out an unnecessary forward declaration. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Add a recovery marking scheme for state ownersTrond Myklebust2008-12-23
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Remove redundant RENEW calls if we know the lease has expiredTrond Myklebust2008-12-23
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix state recovery when the client runs over the grace periodTrond Myklebust2008-12-23
| | | | | | | | | If the client for some reason is not able to recover all its state within the time allotted for the grace period, and the server reboots again, the client is not allowed to recover the state that was 'lost' using reboot recovery. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Use atomic bitops when changing struct nfs_delegation->flagsTrond Myklebust2008-12-23
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix up another delegation related raceTrond Myklebust2008-12-23
| | | | | | | | | When we can update_open_stateid(), we need to be certain that we don't race with a delegation return. While we could do this by grabbing the nfs_client->cl_lock, a dedicated spin lock in the delegation structure will scale better. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Make nfs_file_cred more robust.Neil Brown2008-10-17
| | | | | | | | | As not all files have an associated open_context (e.g. device special files), it is safest to test for the existence of the open context before de-referencing it. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Remove BKL usage from open()Trond Myklebust2008-07-15
| | | | | | | All the NFSv4 stateful operations are already protected by other locks (in particular by the rpc_sequence locks. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: initialize timeout variable in nfs4_proc_setclientid_confirmBenny Halevy2008-07-09
| | | | | | | | | | | | | | | | | | gcc (4.3.0) rightfully warns about this: /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/nfs/nfs4proc.c: In function ‘nfs4_proc_setclientid_confirm’: /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/nfs/nfs4proc.c:2936: warning: ‘timeout’ may be used uninitialized in this function nfs4_delay that's passed a pointer to 'timeout' is looking at its value and sets it up to some value in the range: NFS4_POLL_RETRY_MIN..NFS4_POLL_RETRY_MAX if (*timeout <= 0) *timeout = NFS4_POLL_RETRY_MIN; if (*timeout > NFS4_POLL_RETRY_MAX) *timeout = NFS4_POLL_RETRY_MAX; Therefore it will end up set to some sane, though rather indeterministic, value. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Ensure we zap only the access and acl caches when setting new aclsTrond Myklebust2008-07-09
| | | | | | | ...and ensure that we obey the NFS_INO_INVALID_ACL flag when retrieving the acls. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix a warning in nfs4_async_handle_errorTrond Myklebust2008-07-09
| | | | | | | We're not modifying the nfs_server when we call nfs_inc_server_stats and friends, so allow the compiler to pass 'const' pointers too. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Remove the redundant file_open entry from struct nfs_rpc_opsTrond Myklebust2008-07-09
| | | | | | | All instances are set to nfs_open(), so we should just remove the redundant indirection. Ditto for the file_release op Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix the ftruncate() credential problemTrond Myklebust2008-07-09
| | | | | | | ftruncate() access checking is supposed to be performed at open() time, just like reads and writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Reduce the stack usage in NFSv4 create operationsTrond Myklebust2008-07-09
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-20 16:40:24 -0400