git://bbs.cooldavid.org / net-next-2.6.git / blame
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|---|---|---|
| e8062719 BH |
1 | /* |
| 2 | * Copyright (C) 2005, 2006 | |
| 27d2e149 | 3 | * Avishay Traeger (avishay@gmail.com) |
| e8062719 BH |
4 | * Copyright (C) 2008, 2009 |
| 5 | * Boaz Harrosh <bharrosh@panasas.com> | |
| 6 | * | |
| 7 | * Copyrights for code taken from ext2: | |
| 8 | * Copyright (C) 1992, 1993, 1994, 1995 | |
| 9 | * Remy Card (card@masi.ibp.fr) | |
| 10 | * Laboratoire MASI - Institut Blaise Pascal | |
| 11 | * Universite Pierre et Marie Curie (Paris VI) | |
| 12 | * from | |
| 13 | * linux/fs/minix/inode.c | |
| 14 | * Copyright (C) 1991, 1992 Linus Torvalds | |
| 15 | * | |
| 16 | * This file is part of exofs. | |
| 17 | * | |
| 18 | * exofs is free software; you can redistribute it and/or modify | |
| 19 | * it under the terms of the GNU General Public License as published by | |
| 20 | * the Free Software Foundation. Since it is based on ext2, and the only | |
| 21 | * valid version of GPL for the Linux kernel is version 2, the only valid | |
| 22 | * version of GPL for exofs is version 2. | |
| 23 | * | |
| 24 | * exofs is distributed in the hope that it will be useful, | |
| 25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 27 | * GNU General Public License for more details. | |
| 28 | * | |
| 29 | * You should have received a copy of the GNU General Public License | |
| 30 | * along with exofs; if not, write to the Free Software | |
| 31 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 32 | */ | |
| e8062719 BH |
33 | #include "exofs.h" |
| 34 | ||
| 35 | static int exofs_release_file(struct inode *inode, struct file *filp) | |
| 36 | { | |
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| b2848349 BH |
40 | /* exofs_file_fsync - flush the inode to disk |
| 41 | * | |
| 42 | * Note, in exofs all metadata is written as part of inode, regardless. | |
| 43 | * The writeout is synchronous | |
| 44 | */ | |
| 7ea80859 | 45 | static int exofs_file_fsync(struct file *filp, int datasync) |
| e8062719 BH |
46 | { |
| 47 | int ret; | |
| b2848349 BH |
48 | struct inode *inode = filp->f_mapping->host; |
| 49 | struct writeback_control wbc = { | |
| 50 | .sync_mode = WB_SYNC_ALL, | |
| 51 | .nr_to_write = 0, /* metadata-only; caller takes care of data */ | |
| 52 | }; | |
| baaf94cd | 53 | struct super_block *sb; |
| e8062719 | 54 | |
| b2848349 BH |
55 | if (!(inode->i_state & I_DIRTY)) |
| 56 | return 0; | |
| 57 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) | |
| 58 | return 0; | |
| e8062719 | 59 | |
| b2848349 | 60 | ret = sync_inode(inode, &wbc); |
| baaf94cd BH |
61 | |
| 62 | /* This is a good place to write the sb */ | |
| 63 | /* TODO: Sechedule an sb-sync on create */ | |
| 64 | sb = inode->i_sb; | |
| 65 | if (sb->s_dirt) | |
| 66 | exofs_sync_fs(sb, 1); | |
| 67 | ||
| 68 | return ret; | |
| e8062719 BH |
69 | } |
| 70 | ||
| 71 | static int exofs_flush(struct file *file, fl_owner_t id) | |
| 72 | { | |
| b2848349 | 73 | int ret = vfs_fsync(file, 0); |
| e8062719 | 74 | /* TODO: Flush the OSD target */ |
| b2848349 | 75 | return ret; |
| e8062719 BH |
76 | } |
| 77 | ||
| 78 | const struct file_operations exofs_file_operations = { | |
| 79 | .llseek = generic_file_llseek, | |
| 80 | .read = do_sync_read, | |
| 81 | .write = do_sync_write, | |
| 82 | .aio_read = generic_file_aio_read, | |
| 83 | .aio_write = generic_file_aio_write, | |
| 84 | .mmap = generic_file_mmap, | |
| 85 | .open = generic_file_open, | |
| 86 | .release = exofs_release_file, | |
| 87 | .fsync = exofs_file_fsync, | |
| 88 | .flush = exofs_flush, | |
| 89 | .splice_read = generic_file_splice_read, | |
| 90 | .splice_write = generic_file_splice_write, | |
| 91 | }; | |
| 92 | ||
| 93 | const struct inode_operations exofs_file_inode_operations = { | |
| 94 | .truncate = exofs_truncate, | |
| 95 | .setattr = exofs_setattr, | |
| 96 | }; |