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[PATCH] Fix rewriting on a full reiserfs filesystem 

Allow rewriting of a file and extending a file upto the end of the
allocated block on a full filesystem.

From: Chris Mason <mason@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Kara 2005-05-01 08:59:07 -07:00 committed by Linus Torvalds
parent 40be0c28b3
commit 127144df4c
1 changed files with 5 additions and 4 deletions
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9
fs/reiserfs/file.c
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@ -1284,10 +1284,11 @@ static ssize_t reiserfs_file_write( struct file *file, /* the file we are going
reiserfs_claim_blocks_to_be_allocated(inode->i_sb, num_pages << (PAGE_CACHE_SHIFT - inode->i_blkbits));
reiserfs_write_unlock(inode->i_sb);
if ( !num_pages ) { /* If we do not have enough space even for */
res = -ENOSPC; /* single page, return -ENOSPC */
if ( pos > (inode->i_size & (inode->i_sb->s_blocksize-1)))
break; // In case we are writing past the file end, break.
if ( !num_pages ) { /* If we do not have enough space even for a single page... */
if ( pos > inode->i_size+inode->i_sb->s_blocksize-(pos & (inode->i_sb->s_blocksize-1))) {
res = -ENOSPC;
break; // In case we are writing past the end of the last file block, break.
}
// Otherwise we are possibly overwriting the file, so
// let's set write size to be equal or less than blocksize.
// This way we get it correctly for file holes.