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153 lines
3.8 KiB
153 lines
3.8 KiB
// 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(mnt_userns, 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(mnt_userns, 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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