1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) International Business Machines Corp., 2000-2002 4 * Portions Copyright (C) Christoph Hellwig, 2001-2002 5 */ 6 7 #include <linux/mm.h> 8 #include <linux/fs.h> 9 #include <linux/posix_acl.h> 10 #include <linux/quotaops.h> 11 #include "jfs_incore.h" 12 #include "jfs_inode.h" 13 #include "jfs_dmap.h" 14 #include "jfs_txnmgr.h" 15 #include "jfs_xattr.h" 16 #include "jfs_acl.h" 17 #include "jfs_debug.h" 18 19 int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync) 20 { 21 struct inode *inode = file->f_mapping->host; 22 int rc = 0; 23 24 rc = file_write_and_wait_range(file, start, end); 25 if (rc) 26 return rc; 27 28 inode_lock(inode); 29 if (!(inode->i_state & I_DIRTY_ALL) || 30 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) { 31 /* Make sure committed changes hit the disk */ 32 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1); 33 inode_unlock(inode); 34 return rc; 35 } 36 37 rc |= jfs_commit_inode(inode, 1); 38 inode_unlock(inode); 39 40 return rc ? -EIO : 0; 41 } 42 43 static int jfs_open(struct inode *inode, struct file *file) 44 { 45 int rc; 46 47 if ((rc = dquot_file_open(inode, file))) 48 return rc; 49 50 /* 51 * We attempt to allow only one "active" file open per aggregate 52 * group. Otherwise, appending to files in parallel can cause 53 * fragmentation within the files. 54 * 55 * If the file is empty, it was probably just created and going 56 * to be written to. If it has a size, we'll hold off until the 57 * file is actually grown. 58 */ 59 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE && 60 (inode->i_size == 0)) { 61 struct jfs_inode_info *ji = JFS_IP(inode); 62 spin_lock_irq(&ji->ag_lock); 63 if (ji->active_ag == -1) { 64 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb); 65 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb); 66 atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]); 67 } 68 spin_unlock_irq(&ji->ag_lock); 69 } 70 71 return 0; 72 } 73 static int jfs_release(struct inode *inode, struct file *file) 74 { 75 struct jfs_inode_info *ji = JFS_IP(inode); 76 77 spin_lock_irq(&ji->ag_lock); 78 if (ji->active_ag != -1) { 79 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; 80 atomic_dec(&bmap->db_active[ji->active_ag]); 81 ji->active_ag = -1; 82 } 83 spin_unlock_irq(&ji->ag_lock); 84 85 return 0; 86 } 87 88 int jfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, 89 struct iattr *iattr) 90 { 91 struct inode *inode = d_inode(dentry); 92 int rc; 93 94 rc = setattr_prepare(&init_user_ns, dentry, iattr); 95 if (rc) 96 return rc; 97 98 if (is_quota_modification(inode, iattr)) { 99 rc = dquot_initialize(inode); 100 if (rc) 101 return rc; 102 } 103 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) || 104 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) { 105 rc = dquot_transfer(inode, iattr); 106 if (rc) 107 return rc; 108 } 109 110 if ((iattr->ia_valid & ATTR_SIZE) && 111 iattr->ia_size != i_size_read(inode)) { 112 inode_dio_wait(inode); 113 114 rc = inode_newsize_ok(inode, iattr->ia_size); 115 if (rc) 116 return rc; 117 118 truncate_setsize(inode, iattr->ia_size); 119 jfs_truncate(inode); 120 } 121 122 setattr_copy(&init_user_ns, inode, iattr); 123 mark_inode_dirty(inode); 124 125 if (iattr->ia_valid & ATTR_MODE) 126 rc = posix_acl_chmod(&init_user_ns, inode, inode->i_mode); 127 return rc; 128 } 129 130 const struct inode_operations jfs_file_inode_operations = { 131 .listxattr = jfs_listxattr, 132 .setattr = jfs_setattr, 133 #ifdef CONFIG_JFS_POSIX_ACL 134 .get_acl = jfs_get_acl, 135 .set_acl = jfs_set_acl, 136 #endif 137 }; 138 139 const struct file_operations jfs_file_operations = { 140 .open = jfs_open, 141 .llseek = generic_file_llseek, 142 .read_iter = generic_file_read_iter, 143 .write_iter = generic_file_write_iter, 144 .mmap = generic_file_mmap, 145 .splice_read = generic_file_splice_read, 146 .splice_write = iter_file_splice_write, 147 .fsync = jfs_fsync, 148 .release = jfs_release, 149 .unlocked_ioctl = jfs_ioctl, 150 #ifdef CONFIG_COMPAT 151 .compat_ioctl = jfs_compat_ioctl, 152 #endif 153 }; 154