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- // Copyright 2015 Google Inc. All Rights Reserved.
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package statfs_test
- import (
- "fmt"
- "math"
- "regexp"
- "syscall"
- "github.com/jacobsa/fuse/fuseops"
- . "github.com/jacobsa/ogletest"
- )
- // Sample output:
- //
- // Filesystem 1024-blocks Used Available Capacity iused ifree %iused Mounted on
- // fake@bucket 32 16 16 50% 0 0 100% /Users/jacobsa/tmp/mp
- //
- var gDfOutputRegexp = regexp.MustCompile(`^\S+\s+(\d+)\s+(\d+)\s+(\d+)\s+\d+%\s+\d+\s+\d+\s+\d+%.*$`)
- ////////////////////////////////////////////////////////////////////////
- // Helpers
- ////////////////////////////////////////////////////////////////////////
- func convertName(in []int8) (s string) {
- var tmp []byte
- for _, v := range in {
- if v == 0 {
- break
- }
- tmp = append(tmp, byte(v))
- }
- s = string(tmp)
- return
- }
- ////////////////////////////////////////////////////////////////////////
- // Tests
- ////////////////////////////////////////////////////////////////////////
- func (t *StatFSTest) Syscall_ZeroValues() {
- var err error
- var stat syscall.Statfs_t
- // Call without configuring a canned response, meaning the OS will see the
- // zero value for each field. The assertions below act as documentation for
- // the OS's behavior in this case.
- err = syscall.Statfs(t.Dir, &stat)
- AssertEq(nil, err)
- ExpectEq(4096, stat.Bsize)
- ExpectEq(65536, stat.Iosize)
- ExpectEq(0, stat.Blocks)
- ExpectEq(0, stat.Bfree)
- ExpectEq(0, stat.Bavail)
- ExpectEq(0, stat.Files)
- ExpectEq(0, stat.Ffree)
- ExpectEq("osxfuse", convertName(stat.Fstypename[:]))
- ExpectEq(t.canonicalDir, convertName(stat.Mntonname[:]))
- ExpectEq(fsName, convertName(stat.Mntfromname[:]))
- }
- func (t *StatFSTest) Syscall_NonZeroValues() {
- var err error
- var stat syscall.Statfs_t
- // Set up the canned response.
- canned := fuseops.StatFSOp{
- BlockSize: 1 << 15,
- IoSize: 1 << 16,
- Blocks: 1<<51 + 3,
- BlocksFree: 1<<43 + 5,
- BlocksAvailable: 1<<41 + 7,
- Inodes: 1<<59 + 11,
- InodesFree: 1<<58 + 13,
- }
- t.fs.SetStatFSResponse(canned)
- // Stat.
- err = syscall.Statfs(t.Dir, &stat)
- AssertEq(nil, err)
- ExpectEq(canned.BlockSize, stat.Bsize)
- ExpectEq(canned.IoSize, stat.Iosize)
- ExpectEq(canned.Blocks, stat.Blocks)
- ExpectEq(canned.BlocksFree, stat.Bfree)
- ExpectEq(canned.BlocksAvailable, stat.Bavail)
- ExpectEq(canned.Inodes, stat.Files)
- ExpectEq(canned.InodesFree, stat.Ffree)
- ExpectEq("osxfuse", convertName(stat.Fstypename[:]))
- ExpectEq(t.canonicalDir, convertName(stat.Mntonname[:]))
- ExpectEq(fsName, convertName(stat.Mntfromname[:]))
- }
- func (t *StatFSTest) BlockSizes() {
- var err error
- // Test a bunch of block sizes that the OS does or doesn't support
- // faithfully, checking what it transforms them too.
- testCases := []struct {
- fsBlockSize uint32
- expectedBsize uint32
- }{
- 0: {0, 4096},
- 1: {1, 128},
- 2: {3, 128},
- 3: {511, 512},
- 4: {512, 512},
- 5: {513, 1024},
- 6: {1023, 1024},
- 7: {1024, 1024},
- 8: {4095, 4096},
- 9: {1 << 16, 1 << 16},
- 10: {1 << 17, 1 << 17},
- 11: {1 << 18, 1 << 18},
- 12: {1 << 19, 1 << 19},
- 13: {1<<20 - 1, 1 << 20},
- 14: {1 << 20, 1 << 20},
- 15: {1<<20 + 1, 1 << 20},
- 16: {1 << 21, 1 << 20},
- 17: {1 << 22, 1 << 20},
- 18: {math.MaxInt32 - 1, 1 << 20},
- 19: {math.MaxInt32, 1 << 20},
- 20: {math.MaxInt32 + 1, 128},
- 21: {math.MaxInt32 + 1<<15, 1 << 15},
- 22: {math.MaxUint32, 1 << 20},
- }
- for i, tc := range testCases {
- desc := fmt.Sprintf("Case %d: block size %d", i, tc.fsBlockSize)
- // Set up.
- canned := fuseops.StatFSOp{
- BlockSize: tc.fsBlockSize,
- Blocks: 10,
- }
- t.fs.SetStatFSResponse(canned)
- // Check.
- var stat syscall.Statfs_t
- err = syscall.Statfs(t.Dir, &stat)
- AssertEq(nil, err)
- ExpectEq(tc.expectedBsize, stat.Bsize, "%s", desc)
- }
- }
- func (t *StatFSTest) IoSizes() {
- var err error
- // Test a bunch of io sizes that the OS does or doesn't support faithfully,
- // checking what it transforms them too.
- testCases := []struct {
- fsIoSize uint32
- expectedIosize uint32
- }{
- 0: {0, 65536},
- 1: {1, 4096},
- 2: {3, 4096},
- 3: {4095, 4096},
- 4: {4096, 4096},
- 5: {4097, 8192},
- 6: {8191, 8192},
- 7: {8192, 8192},
- 8: {8193, 16384},
- 9: {1 << 18, 1 << 18},
- 10: {1 << 20, 1 << 20},
- 11: {1 << 23, 1 << 23},
- 12: {1<<25 - 1, 1 << 25},
- 13: {1 << 25, 1 << 25},
- 14: {1<<25 + 1, 1 << 25},
- 15: {math.MaxInt32 - 1, 1 << 25},
- 16: {math.MaxInt32, 1 << 25},
- 17: {math.MaxInt32 + 1, 4096},
- 18: {math.MaxInt32 + 1<<15, 1 << 15},
- 19: {math.MaxUint32, 1 << 25},
- }
- for i, tc := range testCases {
- desc := fmt.Sprintf("Case %d: IO size %d", i, tc.fsIoSize)
- // Set up.
- canned := fuseops.StatFSOp{
- IoSize: tc.fsIoSize,
- Blocks: 10,
- }
- t.fs.SetStatFSResponse(canned)
- // Check.
- var stat syscall.Statfs_t
- err = syscall.Statfs(t.Dir, &stat)
- AssertEq(nil, err)
- ExpectEq(tc.expectedIosize, stat.Iosize, "%s", desc)
- }
- }
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