907f4554e2
Currently various places in the VFS call vfs_dq_init directly. This means we tie the quota code into the VFS. Get rid of that and make the filesystem responsible for the initialization. For most metadata operations this is a straight forward move into the methods, but for truncate and open it's a bit more complicated. For truncate we currently only call vfs_dq_init for the sys_truncate case because open already takes care of it for ftruncate and open(O_TRUNC) - the new code causes an additional vfs_dq_init for those which is harmless. For open the initialization is moved from do_filp_open into the open method, which means it happens slightly earlier now, and only for regular files. The latter is fine because we don't need to initialize it for operations on special files, and we already do it as part of the namespace operations for directories. Add a dquot_file_open helper that filesystems that support generic quotas can use to fill in ->open. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/*
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* linux/fs/ext3/file.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/fs/minix/file.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* ext3 fs regular file handling primitives
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*
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* 64-bit file support on 64-bit platforms by Jakub Jelinek
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* (jj@sunsite.ms.mff.cuni.cz)
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*/
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#include <linux/time.h>
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#include <linux/fs.h>
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#include <linux/jbd.h>
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#include <linux/ext3_fs.h>
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#include <linux/ext3_jbd.h>
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#include "xattr.h"
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#include "acl.h"
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/*
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* Called when an inode is released. Note that this is different
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* from ext3_file_open: open gets called at every open, but release
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* gets called only when /all/ the files are closed.
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*/
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static int ext3_release_file (struct inode * inode, struct file * filp)
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{
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if (ext3_test_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE)) {
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filemap_flush(inode->i_mapping);
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ext3_clear_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE);
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}
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/* if we are the last writer on the inode, drop the block reservation */
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if ((filp->f_mode & FMODE_WRITE) &&
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(atomic_read(&inode->i_writecount) == 1))
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{
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mutex_lock(&EXT3_I(inode)->truncate_mutex);
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ext3_discard_reservation(inode);
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mutex_unlock(&EXT3_I(inode)->truncate_mutex);
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}
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if (is_dx(inode) && filp->private_data)
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ext3_htree_free_dir_info(filp->private_data);
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return 0;
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}
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const struct file_operations ext3_file_operations = {
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.llseek = generic_file_llseek,
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.read = do_sync_read,
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.write = do_sync_write,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.unlocked_ioctl = ext3_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ext3_compat_ioctl,
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#endif
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.mmap = generic_file_mmap,
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.open = dquot_file_open,
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.release = ext3_release_file,
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.fsync = ext3_sync_file,
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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};
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const struct inode_operations ext3_file_inode_operations = {
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.truncate = ext3_truncate,
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.setattr = ext3_setattr,
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#ifdef CONFIG_EXT3_FS_XATTR
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.setxattr = generic_setxattr,
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.getxattr = generic_getxattr,
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.listxattr = ext3_listxattr,
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.removexattr = generic_removexattr,
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#endif
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.check_acl = ext3_check_acl,
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.fiemap = ext3_fiemap,
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};
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