diff options
| -rw-r--r-- | fs/afs/afs_fs.h | 2 | ||||
| -rw-r--r-- | fs/afs/fsclient.c | 217 | ||||
| -rw-r--r-- | fs/afs/write.c | 14 |
3 files changed, 216 insertions, 17 deletions
diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h index 2198006..d963ef4 100644 --- a/fs/afs/afs_fs.h +++ b/fs/afs/afs_fs.h @@ -31,6 +31,8 @@ enum AFS_FS_Operations { FSGETVOLUMEINFO = 148, /* AFS Get root volume information */ FSGETROOTVOLUME = 151, /* AFS Get root volume name */ FSLOOKUP = 161, /* AFS lookup file in directory */ + FSFETCHDATA64 = 65537, /* AFS Fetch file data */ + FSSTOREDATA64 = 65538, /* AFS Store file data */ }; enum AFS_FS_Errors { diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c index 025b190..56cc0ef 100644 --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -293,9 +293,33 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call, case 0: call->offset = 0; call->unmarshall++; + if (call->operation_ID != FSFETCHDATA64) { + call->unmarshall++; + goto no_msw; + } - /* extract the returned data length */ + /* extract the upper part of the returned data length of an + * FSFETCHDATA64 op (which should always be 0 using this + * client) */ case 1: + _debug("extract data length (MSW)"); + ret = afs_extract_data(call, skb, last, &call->tmp, 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } + + call->count = ntohl(call->tmp); + _debug("DATA length MSW: %u", call->count); + if (call->count > 0) + return -EBADMSG; + call->offset = 0; + call->unmarshall++; + + no_msw: + /* extract the returned data length */ + case 2: _debug("extract data length"); ret = afs_extract_data(call, skb, last, &call->tmp, 4); switch (ret) { @@ -312,7 +336,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call, call->unmarshall++; /* extract the returned data */ - case 2: + case 3: _debug("extract data"); if (call->count > 0) { page = call->reply3; @@ -331,7 +355,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call, call->unmarshall++; /* extract the metadata */ - case 3: + case 4: ret = afs_extract_data(call, skb, last, call->buffer, (21 + 3 + 6) * 4); switch (ret) { @@ -349,7 +373,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call, call->offset = 0; call->unmarshall++; - case 4: + case 5: _debug("trailer"); if (skb->len != 0) return -EBADMSG; @@ -381,6 +405,56 @@ static const struct afs_call_type afs_RXFSFetchData = { .destructor = afs_flat_call_destructor, }; +static const struct afs_call_type afs_RXFSFetchData64 = { + .name = "FS.FetchData64", + .deliver = afs_deliver_fs_fetch_data, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * fetch data from a very large file + */ +static int afs_fs_fetch_data64(struct afs_server *server, + struct key *key, + struct afs_vnode *vnode, + off_t offset, size_t length, + struct page *buffer, + const struct afs_wait_mode *wait_mode) +{ + struct afs_call *call; + __be32 *bp; + + _enter(""); + + ASSERTCMP(length, <, ULONG_MAX); + + call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4); + if (!call) + return -ENOMEM; + + call->key = key; + call->reply = vnode; + call->reply2 = NULL; /* volsync */ + call->reply3 = buffer; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); + call->operation_ID = FSFETCHDATA64; + + /* marshall the parameters */ + bp = call->request; + bp[0] = htonl(FSFETCHDATA64); + bp[1] = htonl(vnode->fid.vid); + bp[2] = htonl(vnode->fid.vnode); + bp[3] = htonl(vnode->fid.unique); + bp[4] = htonl(upper_32_bits(offset)); + bp[5] = htonl((u32) offset); + bp[6] = 0; + bp[7] = htonl((u32) length); + + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} + /* * fetch data from a file */ @@ -394,6 +468,10 @@ int afs_fs_fetch_data(struct afs_server *server, struct afs_call *call; __be32 *bp; + if (upper_32_bits(offset) || upper_32_bits(offset + length)) + return afs_fs_fetch_data64(server, key, vnode, offset, length, + buffer, wait_mode); + _enter(""); call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4); @@ -406,6 +484,7 @@ int afs_fs_fetch_data(struct afs_server *server, call->reply3 = buffer; call->service_id = FS_SERVICE; call->port = htons(AFS_FS_PORT); + call->operation_ID = FSFETCHDATA; /* marshall the parameters */ bp = call->request; @@ -1032,6 +1111,73 @@ static const struct afs_call_type afs_RXFSStoreData = { .destructor = afs_flat_call_destructor, }; +static const struct afs_call_type afs_RXFSStoreData64 = { + .name = "FS.StoreData64", + .deliver = afs_deliver_fs_store_data, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * store a set of pages to a very large file + */ +static int afs_fs_store_data64(struct afs_server *server, + struct afs_writeback *wb, + pgoff_t first, pgoff_t last, + unsigned offset, unsigned to, + loff_t size, loff_t pos, loff_t i_size, + const struct afs_wait_mode *wait_mode) +{ + struct afs_vnode *vnode = wb->vnode; + struct afs_call *call; + __be32 *bp; + + _enter(",%x,{%x:%u},,", + key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode); + + call = afs_alloc_flat_call(&afs_RXFSStoreData64, + (4 + 6 + 3 * 2) * 4, + (21 + 6) * 4); + if (!call) + return -ENOMEM; + + call->wb = wb; + call->key = wb->key; + call->reply = vnode; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); + call->mapping = vnode->vfs_inode.i_mapping; + call->first = first; + call->last = last; + call->first_offset = offset; + call->last_to = to; + call->send_pages = true; + call->store_version = vnode->status.data_version + 1; + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(FSSTOREDATA64); + *bp++ = htonl(vnode->fid.vid); + *bp++ = htonl(vnode->fid.vnode); + *bp++ = htonl(vnode->fid.unique); + + *bp++ = 0; /* mask */ + *bp++ = 0; /* mtime */ + *bp++ = 0; /* owner */ + *bp++ = 0; /* group */ + *bp++ = 0; /* unix mode */ + *bp++ = 0; /* segment size */ + + *bp++ = htonl(pos >> 32); + *bp++ = htonl((u32) pos); + *bp++ = htonl(size >> 32); + *bp++ = htonl((u32) size); + *bp++ = htonl(i_size >> 32); + *bp++ = htonl((u32) i_size); + + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} + /* * store a set of pages */ @@ -1062,7 +1208,9 @@ int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb, (unsigned long long) size, (unsigned long long) pos, (unsigned long long) i_size); - BUG_ON(i_size > 0xffffffff); // TODO: use 64-bit store + if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32) + return afs_fs_store_data64(server, wb, first, last, offset, to, + size, pos, i_size, wait_mode); call = afs_alloc_flat_call(&afs_RXFSStoreData, (4 + 6 + 3) * 4, @@ -1158,6 +1306,61 @@ static const struct afs_call_type afs_RXFSStoreData_as_Status = { .destructor = afs_flat_call_destructor, }; +static const struct afs_call_type afs_RXFSStoreData64_as_Status = { + .name = "FS.StoreData64", + .deliver = afs_deliver_fs_store_status, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * set the attributes on a very large file, using FS.StoreData rather than + * FS.StoreStatus so as to alter the file size also + */ +static int afs_fs_setattr_size64(struct afs_server *server, struct key *key, + struct afs_vnode *vnode, struct iattr *attr, + const struct afs_wait_mode *wait_mode) +{ + struct afs_call *call; + __be32 *bp; + + _enter(",%x,{%x:%u},,", + key_serial(key), vnode->fid.vid, vnode->fid.vnode); + + ASSERT(attr->ia_valid & ATTR_SIZE); + + call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status, + (4 + 6 + 3 * 2) * 4, + (21 + 6) * 4); + if (!call) + return -ENOMEM; + + call->key = key; + call->reply = vnode; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); + call->store_version = vnode->status.data_version + 1; + call->operation_ID = FSSTOREDATA; + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(FSSTOREDATA64); + *bp++ = htonl(vnode->fid.vid); + *bp++ = htonl(vnode->fid.vnode); + *bp++ = htonl(vnode->fid.unique); + + xdr_encode_AFS_StoreStatus(&bp, attr); + + *bp++ = 0; /* position of start of write */ + *bp++ = 0; + *bp++ = 0; /* size of write */ + *bp++ = 0; + *bp++ = htonl(attr->ia_size >> 32); /* new file length */ + *bp++ = htonl((u32) attr->ia_size); + + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} + /* * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus * so as to alter the file size also @@ -1173,7 +1376,9 @@ static int afs_fs_setattr_size(struct afs_server *server, struct key *key, key_serial(key), vnode->fid.vid, vnode->fid.vnode); ASSERT(attr->ia_valid & ATTR_SIZE); - ASSERTCMP(attr->ia_size, <=, 0xffffffff); // TODO: use 64-bit store + if (attr->ia_size >> 32) + return afs_fs_setattr_size64(server, key, vnode, attr, + wait_mode); call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status, (4 + 6 + 3) * 4, diff --git a/fs/afs/write.c b/fs/afs/write.c index 83ff292..aa03d43 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -122,7 +122,7 @@ static int afs_prepare_page(struct afs_vnode *vnode, struct page *page, if (offset == 0 && to == PAGE_SIZE) return 0; - p = kmap(page); + p = kmap_atomic(page, KM_USER0); i_size = i_size_read(&vnode->vfs_inode); pos = (loff_t) page->index << PAGE_SHIFT; @@ -133,7 +133,7 @@ static int afs_prepare_page(struct afs_vnode *vnode, struct page *page, memset(p, 0, offset); if (to < PAGE_SIZE) memset(p + to, 0, PAGE_SIZE - to); - kunmap(page); + kunmap_atomic(p, KM_USER0); return 0; } @@ -152,7 +152,7 @@ static int afs_prepare_page(struct afs_vnode *vnode, struct page *page, memset(p + eof, 0, PAGE_SIZE - eof); } - kunmap(p); + kunmap_atomic(p, KM_USER0); ret = 0; if (offset > 0 || eof > to) { @@ -489,14 +489,6 @@ int afs_writepage(struct page *page, struct writeback_control *wbc) _enter("{%lx},", page->index); - if (wbc->sync_mode != WB_SYNC_NONE) - wait_on_page_writeback(page); - - if (PageWriteback(page) || !PageDirty(page)) { - unlock_page(page); - return 0; - } - wb = (struct afs_writeback *) page_private(page); ASSERT(wb != NULL); |