open & write in kernel mode

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hi

what are the equivalent function to the user space system calls open &
write ?

for open:
should i use filp_open or open_dentry ?
do i need to satisfy some pre request to call them ( i.e. do i need to
get any lock first ? ) or are they self-sufficient ?

for write:
sys_write looks ok, but it is not exported.
should i cat & paste its code or that i need to call another function?
and if so should it be generic_file_write or block_write?
and again, do i need to satisfy any pre-conditions ?

please CC me for any answer
THX
/gaby

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• Next message: Trond Myklebust: "Re: Fixing invalidate_inode_pages() and mmapped files..."
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