1 /* 2 * Copyright (C) International Business Machines Corp., 2000-2002 3 * Portions Copyright (C) Christoph Hellwig, 2001-2002 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20 #include <linux/fs.h> 21 #include <linux/quotaops.h> 22 #include "jfs_incore.h" 23 #include "jfs_inode.h" 24 #include "jfs_dmap.h" 25 #include "jfs_txnmgr.h" 26 #include "jfs_xattr.h" 27 #include "jfs_acl.h" 28 #include "jfs_debug.h" 29 30 int jfs_fsync(struct file *file, struct dentry *dentry, int datasync) 31 { 32 struct inode *inode = dentry->d_inode; 33 int rc = 0; 34 35 if (!(inode->i_state & I_DIRTY) || 36 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) { 37 /* Make sure committed changes hit the disk */ 38 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1); 39 return rc; 40 } 41 42 rc |= jfs_commit_inode(inode, 1); 43 44 return rc ? -EIO : 0; 45 } 46 47 static int jfs_open(struct inode *inode, struct file *file) 48 { 49 int rc; 50 51 if ((rc = dquot_file_open(inode, file))) 52 return rc; 53 54 /* 55 * We attempt to allow only one "active" file open per aggregate 56 * group. Otherwise, appending to files in parallel can cause 57 * fragmentation within the files. 58 * 59 * If the file is empty, it was probably just created and going 60 * to be written to. If it has a size, we'll hold off until the 61 * file is actually grown. 62 */ 63 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE && 64 (inode->i_size == 0)) { 65 struct jfs_inode_info *ji = JFS_IP(inode); 66 spin_lock_irq(&ji->ag_lock); 67 if (ji->active_ag == -1) { 68 ji->active_ag = ji->agno; 69 atomic_inc( 70 &JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]); 71 } 72 spin_unlock_irq(&ji->ag_lock); 73 } 74 75 return 0; 76 } 77 static int jfs_release(struct inode *inode, struct file *file) 78 { 79 struct jfs_inode_info *ji = JFS_IP(inode); 80 81 spin_lock_irq(&ji->ag_lock); 82 if (ji->active_ag != -1) { 83 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; 84 atomic_dec(&bmap->db_active[ji->active_ag]); 85 ji->active_ag = -1; 86 } 87 spin_unlock_irq(&ji->ag_lock); 88 89 return 0; 90 } 91 92 int jfs_setattr(struct dentry *dentry, struct iattr *iattr) 93 { 94 struct inode *inode = dentry->d_inode; 95 int rc; 96 97 rc = inode_change_ok(inode, iattr); 98 if (rc) 99 return rc; 100 101 if (iattr->ia_valid & ATTR_SIZE) 102 dquot_initialize(inode); 103 if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) || 104 (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) { 105 rc = dquot_transfer(inode, iattr); 106 if (rc) 107 return rc; 108 } 109 110 rc = inode_setattr(inode, iattr); 111 112 if (!rc && (iattr->ia_valid & ATTR_MODE)) 113 rc = jfs_acl_chmod(inode); 114 115 return rc; 116 } 117 118 const struct inode_operations jfs_file_inode_operations = { 119 .truncate = jfs_truncate, 120 .setxattr = jfs_setxattr, 121 .getxattr = jfs_getxattr, 122 .listxattr = jfs_listxattr, 123 .removexattr = jfs_removexattr, 124 .setattr = jfs_setattr, 125 #ifdef CONFIG_JFS_POSIX_ACL 126 .check_acl = jfs_check_acl, 127 #endif 128 }; 129 130 const struct file_operations jfs_file_operations = { 131 .open = jfs_open, 132 .llseek = generic_file_llseek, 133 .write = do_sync_write, 134 .read = do_sync_read, 135 .aio_read = generic_file_aio_read, 136 .aio_write = generic_file_aio_write, 137 .mmap = generic_file_mmap, 138 .splice_read = generic_file_splice_read, 139 .splice_write = generic_file_splice_write, 140 .fsync = jfs_fsync, 141 .release = jfs_release, 142 .unlocked_ioctl = jfs_ioctl, 143 #ifdef CONFIG_COMPAT 144 .compat_ioctl = jfs_compat_ioctl, 145 #endif 146 }; 147