- 09 Mar, 2019 12 commits
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J. R. Okajima authored
For details, see previous commit. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
The branch object is managed by the sbinfo object as an element of its internal array. The iinfo and dinfo objects contain the branch id, and it will be used to implement the correct order in branch management (add/del). See also the documents in this commit. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
The generation of iinfo and dinfo inherit sbinfo's. Also iinfo generation tracks the branch inode's generation to test the matching after the branch management. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
The generation of aufs objects will be updated by the branch management (add/del branches, by later commit), and aufs will refresh the objects based upon the generation. In refreshing dinfos, aufs will find all ancestors of the given dentry and store the pointers in dynamically allocated memory. I don't think it beautiful, but I don't have any other idea. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
The structure is very similar to inode and dentry infos (in previous commits), but the internal array is for 'struct au_branch' instead of 'superblock.' Additionally the lifetime of 'struct au_sbinfo' is managed by kobject since it will be connected to sysfs by later commit. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
The structure is very similar to aufs inode info (in previous commit). Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
Print various info about aufs inode. This feature is enabled when CONFIG_AUFS_DEBUG and the module parameter 'debug' are set. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
This parameter is available only when CONFIG_AUFS_DEBUG is enabled, and its default value is 0. Setting 1 will enable the various verifications and debug outputs. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
This is a very old debugging routine for rw_semaphore I was using privately and less meaningful to other people. It was (probably) before LOCKDEP feature was introduced, but now it is based upon LOCKDEP. This is compiled when CONFIG_AUFS_DEBUG is enabled. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
See the documents in this commit. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
Very basic, simple and stupid wrappers for kmalloc family. It tries kfree_ruc() as possible, with hoping a better performance. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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J. R. Okajima authored
A header file for both of kernelspace and userspace. For the new file fs/aufs/Kconfig, the maximum number of branches is customizable, and it determines the type (size) of 'aufs_bindex_t.' The type is always 'signed.' If we made it 'unsigned,' then more branches would be available. But generally I think 127 (default) is enough and it won't be a big issue. For those who wants more than 127 branches, other values are available. But we should care the size of the internal pointer arrays, and it is good for the performance to keep it in a page at most. AUFS_BRANCH_MAX_511 is mainly for 64bit systems which limits the internal array size less than 4k (511 x 8bytes < 4k). Similarly for 32bit systems, AUFS_BRANCH_MAX_1023 (1023 x 4 bytes < 4k). See also the documents in this commit. Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
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