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a6e6df25ec
A user-specified get_nlinks may depend on other inode attributes. Cc: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/fs_stack.h>
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/* does _NOT_ require i_mutex to be held.
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*
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* This function cannot be inlined since i_size_{read,write} is rather
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* heavy-weight on 32-bit systems
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*/
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void fsstack_copy_inode_size(struct inode *dst, const struct inode *src)
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{
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i_size_write(dst, i_size_read((struct inode *)src));
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dst->i_blocks = src->i_blocks;
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}
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EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
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/* copy all attributes; get_nlinks is optional way to override the i_nlink
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* copying
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*/
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void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
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int (*get_nlinks)(struct inode *))
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{
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dest->i_mode = src->i_mode;
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dest->i_uid = src->i_uid;
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dest->i_gid = src->i_gid;
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dest->i_rdev = src->i_rdev;
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dest->i_atime = src->i_atime;
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dest->i_mtime = src->i_mtime;
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dest->i_ctime = src->i_ctime;
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dest->i_blkbits = src->i_blkbits;
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dest->i_flags = src->i_flags;
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/*
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* Update the nlinks AFTER updating the above fields, because the
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* get_links callback may depend on them.
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*/
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if (!get_nlinks)
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dest->i_nlink = src->i_nlink;
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else
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dest->i_nlink = (*get_nlinks)(dest);
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}
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EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);
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