154 строки
3.8 KiB
C
154 строки
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) International Business Machines Corp., 2000-2002
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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*/
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/posix_acl.h>
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#include <linux/quotaops.h>
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#include "jfs_incore.h"
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#include "jfs_inode.h"
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#include "jfs_dmap.h"
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#include "jfs_txnmgr.h"
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#include "jfs_xattr.h"
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#include "jfs_acl.h"
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#include "jfs_debug.h"
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int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
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{
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struct inode *inode = file->f_mapping->host;
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int rc = 0;
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rc = file_write_and_wait_range(file, start, end);
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if (rc)
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return rc;
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inode_lock(inode);
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if (!(inode->i_state & I_DIRTY_ALL) ||
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(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
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/* Make sure committed changes hit the disk */
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jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
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inode_unlock(inode);
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return rc;
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}
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rc |= jfs_commit_inode(inode, 1);
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inode_unlock(inode);
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return rc ? -EIO : 0;
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}
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static int jfs_open(struct inode *inode, struct file *file)
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{
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int rc;
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if ((rc = dquot_file_open(inode, file)))
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return rc;
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/*
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* We attempt to allow only one "active" file open per aggregate
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* group. Otherwise, appending to files in parallel can cause
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* fragmentation within the files.
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*
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* If the file is empty, it was probably just created and going
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* to be written to. If it has a size, we'll hold off until the
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* file is actually grown.
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*/
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if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
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(inode->i_size == 0)) {
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struct jfs_inode_info *ji = JFS_IP(inode);
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag == -1) {
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struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
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ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
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atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
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}
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spin_unlock_irq(&ji->ag_lock);
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}
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return 0;
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}
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static int jfs_release(struct inode *inode, struct file *file)
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{
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struct jfs_inode_info *ji = JFS_IP(inode);
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag != -1) {
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struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
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atomic_dec(&bmap->db_active[ji->active_ag]);
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ji->active_ag = -1;
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}
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spin_unlock_irq(&ji->ag_lock);
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return 0;
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}
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int jfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
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struct iattr *iattr)
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{
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struct inode *inode = d_inode(dentry);
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int rc;
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rc = setattr_prepare(&init_user_ns, dentry, iattr);
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if (rc)
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return rc;
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if (is_quota_modification(inode, iattr)) {
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rc = dquot_initialize(inode);
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if (rc)
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return rc;
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}
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if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
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(iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
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rc = dquot_transfer(inode, iattr);
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if (rc)
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return rc;
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}
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if ((iattr->ia_valid & ATTR_SIZE) &&
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iattr->ia_size != i_size_read(inode)) {
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inode_dio_wait(inode);
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rc = inode_newsize_ok(inode, iattr->ia_size);
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if (rc)
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return rc;
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truncate_setsize(inode, iattr->ia_size);
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jfs_truncate(inode);
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}
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setattr_copy(&init_user_ns, inode, iattr);
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mark_inode_dirty(inode);
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if (iattr->ia_valid & ATTR_MODE)
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rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode);
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return rc;
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}
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const struct inode_operations jfs_file_inode_operations = {
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.listxattr = jfs_listxattr,
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.setattr = jfs_setattr,
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.fileattr_get = jfs_fileattr_get,
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.fileattr_set = jfs_fileattr_set,
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#ifdef CONFIG_JFS_POSIX_ACL
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.get_acl = jfs_get_acl,
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.set_acl = jfs_set_acl,
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#endif
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};
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const struct file_operations jfs_file_operations = {
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.open = jfs_open,
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.llseek = generic_file_llseek,
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.read_iter = generic_file_read_iter,
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.write_iter = generic_file_write_iter,
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.mmap = generic_file_mmap,
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.splice_read = generic_file_splice_read,
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.splice_write = iter_file_splice_write,
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.fsync = jfs_fsync,
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.release = jfs_release,
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.unlocked_ioctl = jfs_ioctl,
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.compat_ioctl = compat_ptr_ioctl,
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};
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