inode.c (0713ed0cde76438d05849f1537d3aab46e099475) inode.c (eb3544c6fc6642c9037817980d8a9dc9df44aa45)
1/*
2 * linux/fs/ext4/inode.c
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *

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3933 * ext4_truncate() run will find them and release them.
3934 */
3935void ext4_truncate(struct inode *inode)
3936{
3937 struct ext4_inode_info *ei = EXT4_I(inode);
3938 unsigned int credits;
3939 handle_t *handle;
3940 struct address_space *mapping = inode->i_mapping;
1/*
2 * linux/fs/ext4/inode.c
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *

--- 3924 unchanged lines hidden (view full) ---

3933 * ext4_truncate() run will find them and release them.
3934 */
3935void ext4_truncate(struct inode *inode)
3936{
3937 struct ext4_inode_info *ei = EXT4_I(inode);
3938 unsigned int credits;
3939 handle_t *handle;
3940 struct address_space *mapping = inode->i_mapping;
3941 loff_t page_len;
3942
3943 /*
3944 * There is a possibility that we're either freeing the inode
3945 * or it completely new indode. In those cases we might not
3946 * have i_mutex locked because it's not necessary.
3947 */
3948 if (!(inode->i_state & (I_NEW|I_FREEING)))
3949 WARN_ON(!mutex_is_locked(&inode->i_mutex));

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3977 credits = ext4_blocks_for_truncate(inode);
3978
3979 handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits);
3980 if (IS_ERR(handle)) {
3981 ext4_std_error(inode->i_sb, PTR_ERR(handle));
3982 return;
3983 }
3984
3941
3942 /*
3943 * There is a possibility that we're either freeing the inode
3944 * or it completely new indode. In those cases we might not
3945 * have i_mutex locked because it's not necessary.
3946 */
3947 if (!(inode->i_state & (I_NEW|I_FREEING)))
3948 WARN_ON(!mutex_is_locked(&inode->i_mutex));

--- 27 unchanged lines hidden (view full) ---

3976 credits = ext4_blocks_for_truncate(inode);
3977
3978 handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits);
3979 if (IS_ERR(handle)) {
3980 ext4_std_error(inode->i_sb, PTR_ERR(handle));
3981 return;
3982 }
3983
3985 if (inode->i_size % PAGE_CACHE_SIZE != 0) {
3986 page_len = PAGE_CACHE_SIZE -
3987 (inode->i_size & (PAGE_CACHE_SIZE - 1));
3984 if (inode->i_size & (inode->i_sb->s_blocksize - 1))
3985 ext4_block_truncate_page(handle, mapping, inode->i_size);
3988
3986
3989 if (ext4_discard_partial_page_buffers(handle,
3990 mapping, inode->i_size, page_len, 0))
3991 goto out_stop;
3992 }
3993
3994 /*
3995 * We add the inode to the orphan list, so that if this
3996 * truncate spans multiple transactions, and we crash, we will
3997 * resume the truncate when the filesystem recovers. It also
3998 * marks the inode dirty, to catch the new size.
3999 *
4000 * Implication: the file must always be in a sane, consistent
4001 * truncatable state while each transaction commits.

--- 1422 unchanged lines hidden --- 		3987 /*
3988 * We add the inode to the orphan list, so that if this
3989 * truncate spans multiple transactions, and we crash, we will
3990 * resume the truncate when the filesystem recovers. It also
3991 * marks the inode dirty, to catch the new size.
3992 *
3993 * Implication: the file must always be in a sane, consistent
3994 * truncatable state while each transaction commits.

--- 1422 unchanged lines hidden ---