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Hi, all the function ext2_find_shared is located fs/ext2/inode.c 935 I see ext2_find_shared is related with truncation, but i don't know what's the use of it. And i am also confused ...
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- 06-29-2010 #1
- Join Date
- Jun 2010
question about ext2_find_shared
the function ext2_find_shared is located fs/ext2/inode.c 935
I see ext2_find_shared is related with truncation, but i don't know
what's the use of it.
And i am also confused with the implementation of ext2_find_shared.
It would be greatly appreciated if somebody can show me what's the use
of ext2_find_shared and how it works.
- 07-05-2010 #2
- Join Date
- Apr 2009
- I can be found either 40 miles west of Chicago, or in a galaxy far, far away.
I haven't written file system drivers so I may be incorrect; however, from my glancing at the relevant code, find_shared() (redefined for each file system type, so that there is an ext2_find_shared(), ext3_find_shared(), etc.) I think that it is determining where a file may be safely truncated in the blocks allocated to it so they can be returned to the file system for reuse.
So, why do you want/need to know this? Are you writing your own file system driver?Sometimes, real fast is almost as good as real time.
Just remember, Semper Gumbi - always be flexible!