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vfs: add read write files and caching #711

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This adds new flags to mount, cmount, serve *

    --cache-max-age duration         Max age of objects in the cache. (default 1h0m0s)
    --cache-mode string              Cache mode off|minimal|writes|full (default "off")
    --cache-poll-interval duration   Interval to poll the cache for stale objects. (default 1m0s)
This commit is contained in:
Nick Craig-Wood
2017-11-06 21:38:52 +00:00
parent bb0ce0cb5f
commit 7f20e1d7f3
10 changed files with 1438 additions and 55 deletions
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10
vfs/dir.go
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@@ -306,9 +306,12 @@ func (d *Dir) ReadDirAll() (items Nodes, err error) {
return items, nil
}
// accessModeMask masks off the read modes from the flags
const accessModeMask = (os.O_RDONLY | os.O_WRONLY | os.O_RDWR)
// Open the directory according to the flags provided
func (d *Dir) Open(flags int) (fd Handle, err error) {
rdwrMode := flags & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR)
rdwrMode := flags & accessModeMask
if rdwrMode != os.O_RDONLY {
fs.Errorf(d, "Can only open directories read only")
return nil, EPERM
@@ -498,3 +501,8 @@ func (d *Dir) Fsync() error {
func (d *Dir) VFS() *VFS {
return d.vfs
}
// Truncate changes the size of the named file.
func (d *Dir) Truncate(size int64) error {
return ENOSYS
}