diff options
author | David Howells <dhowells@redhat.com> | 2020-02-06 14:22:28 +0000 |
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committer | David Howells <dhowells@redhat.com> | 2021-04-23 10:17:27 +0100 |
commit | bd80d8a80e12895e56a1bb7862b2379942e46167 (patch) | |
tree | 8da0a11e3bc6950133eeb239041d9fd18d42b9eb /fs/afs/fsclient.c | |
parent | c450846461f88b8888d6f5c2a2aa63ab64864978 (diff) | |
download | linux-bd80d8a80e12895e56a1bb7862b2379942e46167.tar.bz2 |
afs: Use ITER_XARRAY for writing
Use a single ITER_XARRAY iterator to describe the portion of a file to be
transmitted to the server rather than generating a series of small
ITER_BVEC iterators on the fly. This will make it easier to implement AIO
in afs.
In theory we could maybe use one giant ITER_BVEC, but that means
potentially allocating a huge array of bio_vec structs (max 256 per page)
when in fact the pagecache already has a structure listing all the relevant
pages (radix_tree/xarray) that can be walked over.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-By: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/153685395197.14766.16289516750731233933.stgit@warthog.procyon.org.uk/
Link: https://lore.kernel.org/r/158861251312.340223.17924900795425422532.stgit@warthog.procyon.org.uk/ # rfc
Link: https://lore.kernel.org/r/159465828607.1377938.6903132788463419368.stgit@warthog.procyon.org.uk/
Link: https://lore.kernel.org/r/160588535018.3465195.14509994354240338307.stgit@warthog.procyon.org.uk/ # rfc
Link: https://lore.kernel.org/r/161118152415.1232039.6452879415814850025.stgit@warthog.procyon.org.uk/ # rfc
Link: https://lore.kernel.org/r/161161048194.2537118.13763612220937637316.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/161340411602.1303470.4661108879482218408.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/161539555629.286939.5241869986617154517.stgit@warthog.procyon.org.uk/ # v4
Link: https://lore.kernel.org/r/161653811456.2770958.7017388543246759245.stgit@warthog.procyon.org.uk/ # v5
Link: https://lore.kernel.org/r/161789095005.6155.6789055030327407928.stgit@warthog.procyon.org.uk/ # v6
Diffstat (limited to 'fs/afs/fsclient.c')
-rw-r--r-- | fs/afs/fsclient.c | 50 |
1 files changed, 20 insertions, 30 deletions
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c index 897b37301851..31e6b3635541 100644 --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -1055,8 +1055,7 @@ static const struct afs_call_type afs_RXFSStoreData64 = { /* * store a set of pages to a very large file */ -static void afs_fs_store_data64(struct afs_operation *op, - loff_t pos, loff_t size, loff_t i_size) +static void afs_fs_store_data64(struct afs_operation *op) { struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; @@ -1071,7 +1070,7 @@ static void afs_fs_store_data64(struct afs_operation *op, if (!call) return afs_op_nomem(op); - call->send_pages = true; + call->write_iter = op->store.write_iter; /* marshall the parameters */ bp = call->request; @@ -1087,47 +1086,38 @@ static void afs_fs_store_data64(struct afs_operation *op, *bp++ = 0; /* unix mode */ *bp++ = 0; /* segment size */ - *bp++ = htonl(upper_32_bits(pos)); - *bp++ = htonl(lower_32_bits(pos)); - *bp++ = htonl(upper_32_bits(size)); - *bp++ = htonl(lower_32_bits(size)); - *bp++ = htonl(upper_32_bits(i_size)); - *bp++ = htonl(lower_32_bits(i_size)); + *bp++ = htonl(upper_32_bits(op->store.pos)); + *bp++ = htonl(lower_32_bits(op->store.pos)); + *bp++ = htonl(upper_32_bits(op->store.size)); + *bp++ = htonl(lower_32_bits(op->store.size)); + *bp++ = htonl(upper_32_bits(op->store.i_size)); + *bp++ = htonl(lower_32_bits(op->store.i_size)); trace_afs_make_fs_call(call, &vp->fid); afs_make_op_call(op, call, GFP_NOFS); } /* - * store a set of pages + * Write data to a file on the server. */ void afs_fs_store_data(struct afs_operation *op) { struct afs_vnode_param *vp = &op->file[0]; struct afs_call *call; - loff_t size, pos, i_size; __be32 *bp; _enter(",%x,{%llx:%llu},,", key_serial(op->key), vp->fid.vid, vp->fid.vnode); - size = (loff_t)op->store.last_to - (loff_t)op->store.first_offset; - if (op->store.first != op->store.last) - size += (loff_t)(op->store.last - op->store.first) << PAGE_SHIFT; - pos = (loff_t)op->store.first << PAGE_SHIFT; - pos += op->store.first_offset; - - i_size = i_size_read(&vp->vnode->vfs_inode); - if (pos + size > i_size) - i_size = size + pos; - _debug("size %llx, at %llx, i_size %llx", - (unsigned long long) size, (unsigned long long) pos, - (unsigned long long) i_size); + (unsigned long long)op->store.size, + (unsigned long long)op->store.pos, + (unsigned long long)op->store.i_size); - if (upper_32_bits(pos) || upper_32_bits(i_size) || upper_32_bits(size) || - upper_32_bits(pos + size)) - return afs_fs_store_data64(op, pos, size, i_size); + if (upper_32_bits(op->store.pos) || + upper_32_bits(op->store.size) || + upper_32_bits(op->store.i_size)) + return afs_fs_store_data64(op); call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData, (4 + 6 + 3) * 4, @@ -1135,7 +1125,7 @@ void afs_fs_store_data(struct afs_operation *op) if (!call) return afs_op_nomem(op); - call->send_pages = true; + call->write_iter = op->store.write_iter; /* marshall the parameters */ bp = call->request; @@ -1151,9 +1141,9 @@ void afs_fs_store_data(struct afs_operation *op) *bp++ = 0; /* unix mode */ *bp++ = 0; /* segment size */ - *bp++ = htonl(lower_32_bits(pos)); - *bp++ = htonl(lower_32_bits(size)); - *bp++ = htonl(lower_32_bits(i_size)); + *bp++ = htonl(lower_32_bits(op->store.pos)); + *bp++ = htonl(lower_32_bits(op->store.size)); + *bp++ = htonl(lower_32_bits(op->store.i_size)); trace_afs_make_fs_call(call, &vp->fid); afs_make_op_call(op, call, GFP_NOFS); |