kernel/git/stable/linux.git/fs/nfs/nfs4filelayout.c, branch master

Push the file layout driver into a subdirectory

2014-05-30T00:21:56+00:00

The object and block layouts already exist in their own subdirectories. This patch completes the set! Note that as a layout denotes nfs4 already, I stripped that prefix out of the file names. Signed-off-by: Tom Haynes Acked-by: Jeff Layton Signed-off-by: Trond Myklebust

pNFS: Handle allocation errors correctly in filelayout_alloc_layout_hdr()

2014-05-30T00:15:32+00:00

Return the NULL pointer when the allocation fails. Reported-by: Fengguang Wu Cc: # 3.5.x Signed-off-by: Trond Myklebust

pnfs: filelayout: support non page aligned layouts

2014-05-29T15:11:50+00:00

Use the new pg_test interface to adjust requests to fit in the current stripe / segment. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

pnfs: support multiple verfs per direct req

2014-05-29T15:11:48+00:00

Support direct requests that span multiple pnfs data servers by comparing nfs_pgio_header->verf to a cached verf in pnfs_commit_bucket. Continue to use dreq->verf if the MDS is used / non-pNFS. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

nfs: chain calls to pg_test

2014-05-29T15:11:47+00:00

Now that pg_test can change the size of the request (by returning a non-zero size smaller than the request), pg_test functions that call other pg_test functions must return the minimum of the result - or 0 if any fail. Also clean up the logic of some pg_test functions so that all checks are for contitions where coalescing is not possible. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

pnfs: clean up filelayout_alloc_commit_info

2014-05-29T15:11:46+00:00

Remove unneeded else statement and clean up how commit info dataserver buckets are replaced. Suggested-by: Trond Myklebust Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

nfs: call nfs_can_coalesce_requests for every req

2014-05-29T15:11:44+00:00

Call nfs_can_coalesce_requests for every request, even the first one. This is needed for future patches to give pg_test a way to inform add_request to reduce the size of the request. Now @prev can be null in nfs_can_coalesce_requests and pg_test functions. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

nfs: modify pg_test interface to return size_t

2014-05-29T15:11:43+00:00

This is a step toward allowing pg_test to inform the the coalescing code to reduce the size of requests so they may fit in whatever scheme the pg_test callback wants to define. For now, just return the size of the request if there is space, or 0 if there is not. This shouldn't change any behavior as it acts the same as when the pg_test functions returned bool. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

pnfs: fix race in filelayout commit path

2014-05-29T15:11:42+00:00

Hold the lock while modifying commit info dataserver buckets. The following oops can be reproduced by running iozone for a while against a 2 DS pynfs filelayout server. general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC Modules linked in: nfs_layout_nfsv41_files rpcsec_gss_krb5 nfsv4 nfs fscache CPU: 0 PID: 903 Comm: iozone Not tainted 3.15.0-rc1-branch-dros_testing+ #44 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference task: ffff880078164480 ti: ffff88006e972000 task.ti: ffff88006e972000 RIP: 0010:[] [] nfs_init_commit+0x22/0x RSP: 0018:ffff88006e973d30 EFLAGS: 00010246 RAX: ffff88006e973e00 RBX: ffff88006e828800 RCX: ffff88006e973e10 RDX: 0000000000000000 RSI: ffff88006e973e00 RDI: dead4ead00000000 RBP: ffff88006e973d38 R08: ffff88006e8289d8 R09: 0000000000000000 R10: ffff88006e8289d8 R11: 0000000000016988 R12: ffff88006e973b98 R13: ffff88007a0a6648 R14: ffff88006e973e10 R15: ffff88006e828800 FS: 00007f2ce396b740(0000) GS:ffff88007f200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f03278a1000 CR3: 0000000079043000 CR4: 00000000001407f0 Stack: ffff88006e8289d8 ffff88006e973da8 ffffffffa00f144f ffff88006e9478c0 ffff88006e973e00 ffff88006de21080 0000000100000002 ffff880079be6c48 ffff88006e973d70 ffff88006e973d70 ffff88006e973e10 ffff88006de21080 Call Trace: [] filelayout_commit_pagelist+0x1ae/0x34a [nfs_layout_nfsv [] nfs_generic_commit_list+0x92/0xc4 [nfs] [] nfs_commit_inode+0xaf/0x114 [nfs] [] nfs_file_fsync_commit+0x82/0xbe [nfs] [] nfs4_file_fsync+0x59/0x9b [nfsv4] [] vfs_fsync_range+0x18/0x20 [] vfs_fsync+0x1c/0x1e [] nfs_file_flush+0x7f/0x84 [nfs] [] filp_close+0x3c/0x72 [] __close_fd+0x82/0x9a [] SyS_close+0x23/0x4c [] system_call_fastpath+0x16/0x1b Code: 5b 41 5c 41 5d 41 5e 5d c3 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 8 RIP [] nfs_init_commit+0x22/0xe1 [nfs] RSP ---[ end trace 732fe6419b235e2f ]--- Suggested-by: Trond Myklebust Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust

NFS: Create a common initiate_pgio() function

2014-05-29T15:11:40+00:00

Most of this code is the same for both the read and write paths, so combine everything and use the rw_ops when necessary. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust