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path: root/internal/fusefrontend_reverse/virtualfile.go
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2017-07-29fusefronted_reverse: fix ino collision between .name and .diriv filesJakob Unterwurzacher
A directory with a long name has two associated virtual files: the .name file and the .diriv files. These used to get the same inode number: $ ls -di1 * */* 33313535 gocryptfs.longname.2togDFouca9mrTwtfF1RNW5DZRAQY8alaR7wO_Xd5Zw 1000000000033313535 gocryptfs.longname.2togDFouca9mrTwtfF1RNW5DZRAQY8alaR7wO_Xd5Zw/gocryptfs.diriv 1000000000033313535 gocryptfs.longname.2togDFouca9mrTwtfF1RNW5DZRAQY8alaR7wO_Xd5Zw.name With this change we use another prefix (2 instead of 1) for .name files. $ ls -di1 * */* 33313535 gocryptfs.longname.2togDFouca9mrTwtfF1RNW5DZRAQY8alaR7wO_Xd5Zw 1000000000033313535 gocryptfs.longname.2togDFouca9mrTwtfF1RNW5DZRAQY8alaR7wO_Xd5Zw/gocryptfs.diriv 2000000000033313535 gocryptfs.longname.2togDFouca9mrTwtfF1RNW5DZRAQY8alaR7wO_Xd5Zw.name
2017-05-30fusefrontend_reverse: move pathiv to its own packageJakob Unterwurzacher
We will also need it in forward mode.
2017-04-01fusefrontend_reverse: switch to stable inode numbersJakob Unterwurzacher
The volatile inode numbers that we used before cause "find" to complain and error out. Virtual inode numbers are derived from their parent file inode number by adding 10^19, which is hopefully large enough no never cause problems in practice. If the backing directory contains inode numbers higher than that, stat() on these files will return EOVERFLOW. Example directory lising after this change: $ ls -i 926473 gocryptfs.conf 1000000000000926466 gocryptfs.diriv 944878 gocryptfs.longname.hmZojMqC6ns47eyVxLlH2ailKjN9bxfosi3C-FR8mjA 1000000000000944878 gocryptfs.longname.hmZojMqC6ns47eyVxLlH2ailKjN9bxfosi3C-FR8mjA.name 934408 Tdfbf02CKsTaGVYnAsSypA
2017-04-01fusefrontend_reverse: convert fmt.Printf calls to tlogJakob Unterwurzacher
The fmt.Printfs output would end up in the paniclog.
2017-04-01fusefrontend_reverse: add comment to newVirtualFileJakob Unterwurzacher
...and improve and comment variable naming in findLongnameParent. No semantic changes.
2017-03-28fusefrontend_reverse: consistent file owners for .diriv, .name filesdanim7
This PR addresses the Issue #95, about "Confusing file owner for longname files in reverse mode". It affects only the reverse mode, and introduces two modifications: 1) The "gocryptfs.longname.XXXX.name" files are assigned the owner and group of the underlying plaintext file. Therefore it is consistent with the file "gocryptfs.longname.XXXX" that has the encrypted contents of the plaintext file. 2) The two virtual files mentioned above are given -r--r--r-- permissions. This is consistent with the behavior described in function Access in internal/fusefrontend_reverse/rfs.go where all virtual files are always readable. Behavior also observed in point c) in #95 . Issue #95 URL: https://github.com/rfjakob/gocryptfs/issues/95 Pull request URL: https://github.com/rfjakob/gocryptfs/pull/97
2016-11-10Fix golint warningsJakob Unterwurzacher
$ golint ./... | grep -v underscore | grep -v ALL_CAPS internal/fusefrontend_reverse/rfs.go:52:36: exported func NewFS returns unexported type *fusefrontend_reverse.reverseFS, which can be annoying to use internal/nametransform/raw64_go1.5.go:10:2: exported const HaveRaw64 should have comment (or a comment on this block) or be unexported
2016-09-29reverse: use per-purpose nonce generationJakob Unterwurzacher
Also pull all the deterministic nonce code into fusefrontend_reverse to greatly simplify the normal code path.
2016-09-28reverse: move newDirIVFile into virtualfile.goJakob Unterwurzacher
After all, is's a virtual file.
2016-09-25reverse: resolve long names in Open and GetAttrJakob Unterwurzacher
The last patch added functionality for generating gocryptfs.longname.* files, this patch adds support for mapping them back to the full filenames. Note that resolving a long name needs a full readdir. A cache will be implemented later on to improve performance.