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new helper: fixed_size_llseek()
Change-Id: Iead39128eb10531a649a0550603083447007bda3 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Git-commit: 1bf9d14dff4a2c4de6152c6f751bdaf6896b68bb Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
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2 changed files with 22 additions and 0 deletions
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@ -144,6 +144,26 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int whence)
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}
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EXPORT_SYMBOL(generic_file_llseek);
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/**
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* fixed_size_llseek - llseek implementation for fixed-sized devices
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* @file: file structure to seek on
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* @offset: file offset to seek to
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* @whence: type of seek
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* @size: size of the file
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*
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*/
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loff_t fixed_size_llseek(struct file *file, loff_t offset, int whence, loff_t size)
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{
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switch (whence) {
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case SEEK_SET: case SEEK_CUR: case SEEK_END:
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return generic_file_llseek_size(file, offset, whence,
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size, size);
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default:
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return -EINVAL;
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}
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}
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EXPORT_SYMBOL(fixed_size_llseek);
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/**
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* noop_llseek - No Operation Performed llseek implementation
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* @file: file structure to seek on
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@ -2422,6 +2422,8 @@ extern loff_t no_llseek(struct file *file, loff_t offset, int whence);
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extern loff_t generic_file_llseek(struct file *file, loff_t offset, int whence);
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extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
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int whence, loff_t maxsize, loff_t eof);
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extern loff_t fixed_size_llseek(struct file *file, loff_t offset,
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int whence, loff_t size);
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extern int generic_file_open(struct inode * inode, struct file * filp);
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extern int nonseekable_open(struct inode * inode, struct file * filp);
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