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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/jfs/inode.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/jfs/inode.c')
-rw-r--r--ANDROID_3.4.5/fs/jfs/inode.c414
1 files changed, 0 insertions, 414 deletions
diff --git a/ANDROID_3.4.5/fs/jfs/inode.c b/ANDROID_3.4.5/fs/jfs/inode.c
deleted file mode 100644
index 77b69b27..00000000
--- a/ANDROID_3.4.5/fs/jfs/inode.c
+++ /dev/null
@@ -1,414 +0,0 @@
-/*
- * Copyright (C) International Business Machines Corp., 2000-2004
- * Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/fs.h>
-#include <linux/mpage.h>
-#include <linux/buffer_head.h>
-#include <linux/pagemap.h>
-#include <linux/quotaops.h>
-#include <linux/writeback.h>
-#include "jfs_incore.h"
-#include "jfs_inode.h"
-#include "jfs_filsys.h"
-#include "jfs_imap.h"
-#include "jfs_extent.h"
-#include "jfs_unicode.h"
-#include "jfs_debug.h"
-
-
-struct inode *jfs_iget(struct super_block *sb, unsigned long ino)
-{
- struct inode *inode;
- int ret;
-
- inode = iget_locked(sb, ino);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
- return inode;
-
- ret = diRead(inode);
- if (ret < 0) {
- iget_failed(inode);
- return ERR_PTR(ret);
- }
-
- if (S_ISREG(inode->i_mode)) {
- inode->i_op = &jfs_file_inode_operations;
- inode->i_fop = &jfs_file_operations;
- inode->i_mapping->a_ops = &jfs_aops;
- } else if (S_ISDIR(inode->i_mode)) {
- inode->i_op = &jfs_dir_inode_operations;
- inode->i_fop = &jfs_dir_operations;
- } else if (S_ISLNK(inode->i_mode)) {
- if (inode->i_size >= IDATASIZE) {
- inode->i_op = &page_symlink_inode_operations;
- inode->i_mapping->a_ops = &jfs_aops;
- } else {
- inode->i_op = &jfs_fast_symlink_inode_operations;
- /*
- * The inline data should be null-terminated, but
- * don't let on-disk corruption crash the kernel
- */
- JFS_IP(inode)->i_inline[inode->i_size] = '\0';
- }
- } else {
- inode->i_op = &jfs_file_inode_operations;
- init_special_inode(inode, inode->i_mode, inode->i_rdev);
- }
- unlock_new_inode(inode);
- return inode;
-}
-
-/*
- * Workhorse of both fsync & write_inode
- */
-int jfs_commit_inode(struct inode *inode, int wait)
-{
- int rc = 0;
- tid_t tid;
- static int noisy = 5;
-
- jfs_info("In jfs_commit_inode, inode = 0x%p", inode);
-
- /*
- * Don't commit if inode has been committed since last being
- * marked dirty, or if it has been deleted.
- */
- if (inode->i_nlink == 0 || !test_cflag(COMMIT_Dirty, inode))
- return 0;
-
- if (isReadOnly(inode)) {
- /* kernel allows writes to devices on read-only
- * partitions and may think inode is dirty
- */
- if (!special_file(inode->i_mode) && noisy) {
- jfs_err("jfs_commit_inode(0x%p) called on "
- "read-only volume", inode);
- jfs_err("Is remount racy?");
- noisy--;
- }
- return 0;
- }
-
- tid = txBegin(inode->i_sb, COMMIT_INODE);
- mutex_lock(&JFS_IP(inode)->commit_mutex);
-
- /*
- * Retest inode state after taking commit_mutex
- */
- if (inode->i_nlink && test_cflag(COMMIT_Dirty, inode))
- rc = txCommit(tid, 1, &inode, wait ? COMMIT_SYNC : 0);
-
- txEnd(tid);
- mutex_unlock(&JFS_IP(inode)->commit_mutex);
- return rc;
-}
-
-int jfs_write_inode(struct inode *inode, struct writeback_control *wbc)
-{
- int wait = wbc->sync_mode == WB_SYNC_ALL;
-
- if (test_cflag(COMMIT_Nolink, inode))
- return 0;
- /*
- * If COMMIT_DIRTY is not set, the inode isn't really dirty.
- * It has been committed since the last change, but was still
- * on the dirty inode list.
- */
- if (!test_cflag(COMMIT_Dirty, inode)) {
- /* Make sure committed changes hit the disk */
- jfs_flush_journal(JFS_SBI(inode->i_sb)->log, wait);
- return 0;
- }
-
- if (jfs_commit_inode(inode, wait)) {
- jfs_err("jfs_write_inode: jfs_commit_inode failed!");
- return -EIO;
- } else
- return 0;
-}
-
-void jfs_evict_inode(struct inode *inode)
-{
- jfs_info("In jfs_evict_inode, inode = 0x%p", inode);
-
- if (!inode->i_nlink && !is_bad_inode(inode)) {
- dquot_initialize(inode);
-
- if (JFS_IP(inode)->fileset == FILESYSTEM_I) {
- truncate_inode_pages(&inode->i_data, 0);
-
- if (test_cflag(COMMIT_Freewmap, inode))
- jfs_free_zero_link(inode);
-
- diFree(inode);
-
- /*
- * Free the inode from the quota allocation.
- */
- dquot_initialize(inode);
- dquot_free_inode(inode);
- }
- } else {
- truncate_inode_pages(&inode->i_data, 0);
- }
- end_writeback(inode);
- dquot_drop(inode);
-}
-
-void jfs_dirty_inode(struct inode *inode, int flags)
-{
- static int noisy = 5;
-
- if (isReadOnly(inode)) {
- if (!special_file(inode->i_mode) && noisy) {
- /* kernel allows writes to devices on read-only
- * partitions and may try to mark inode dirty
- */
- jfs_err("jfs_dirty_inode called on read-only volume");
- jfs_err("Is remount racy?");
- noisy--;
- }
- return;
- }
-
- set_cflag(COMMIT_Dirty, inode);
-}
-
-int jfs_get_block(struct inode *ip, sector_t lblock,
- struct buffer_head *bh_result, int create)
-{
- s64 lblock64 = lblock;
- int rc = 0;
- xad_t xad;
- s64 xaddr;
- int xflag;
- s32 xlen = bh_result->b_size >> ip->i_blkbits;
-
- /*
- * Take appropriate lock on inode
- */
- if (create)
- IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
- else
- IREAD_LOCK(ip, RDWRLOCK_NORMAL);
-
- if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&
- (!xtLookup(ip, lblock64, xlen, &xflag, &xaddr, &xlen, 0)) &&
- xaddr) {
- if (xflag & XAD_NOTRECORDED) {
- if (!create)
- /*
- * Allocated but not recorded, read treats
- * this as a hole
- */
- goto unlock;
-#ifdef _JFS_4K
- XADoffset(&xad, lblock64);
- XADlength(&xad, xlen);
- XADaddress(&xad, xaddr);
-#else /* _JFS_4K */
- /*
- * As long as block size = 4K, this isn't a problem.
- * We should mark the whole page not ABNR, but how
- * will we know to mark the other blocks BH_New?
- */
- BUG();
-#endif /* _JFS_4K */
- rc = extRecord(ip, &xad);
- if (rc)
- goto unlock;
- set_buffer_new(bh_result);
- }
-
- map_bh(bh_result, ip->i_sb, xaddr);
- bh_result->b_size = xlen << ip->i_blkbits;
- goto unlock;
- }
- if (!create)
- goto unlock;
-
- /*
- * Allocate a new block
- */
-#ifdef _JFS_4K
- if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
- goto unlock;
- rc = extAlloc(ip, xlen, lblock64, &xad, false);
- if (rc)
- goto unlock;
-
- set_buffer_new(bh_result);
- map_bh(bh_result, ip->i_sb, addressXAD(&xad));
- bh_result->b_size = lengthXAD(&xad) << ip->i_blkbits;
-
-#else /* _JFS_4K */
- /*
- * We need to do whatever it takes to keep all but the last buffers
- * in 4K pages - see jfs_write.c
- */
- BUG();
-#endif /* _JFS_4K */
-
- unlock:
- /*
- * Release lock on inode
- */
- if (create)
- IWRITE_UNLOCK(ip);
- else
- IREAD_UNLOCK(ip);
- return rc;
-}
-
-static int jfs_writepage(struct page *page, struct writeback_control *wbc)
-{
- return block_write_full_page(page, jfs_get_block, wbc);
-}
-
-static int jfs_writepages(struct address_space *mapping,
- struct writeback_control *wbc)
-{
- return mpage_writepages(mapping, wbc, jfs_get_block);
-}
-
-static int jfs_readpage(struct file *file, struct page *page)
-{
- return mpage_readpage(page, jfs_get_block);
-}
-
-static int jfs_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
-{
- return mpage_readpages(mapping, pages, nr_pages, jfs_get_block);
-}
-
-static int jfs_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
-{
- int ret;
-
- ret = nobh_write_begin(mapping, pos, len, flags, pagep, fsdata,
- jfs_get_block);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
-
- return ret;
-}
-
-static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
-{
- return generic_block_bmap(mapping, block, jfs_get_block);
-}
-
-static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset, unsigned long nr_segs)
-{
- struct file *file = iocb->ki_filp;
- struct inode *inode = file->f_mapping->host;
- ssize_t ret;
-
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- jfs_get_block);
-
- /*
- * In case of error extending write may have instantiated a few
- * blocks outside i_size. Trim these off again.
- */
- if (unlikely((rw & WRITE) && ret < 0)) {
- loff_t isize = i_size_read(inode);
- loff_t end = offset + iov_length(iov, nr_segs);
-
- if (end > isize)
- vmtruncate(inode, isize);
- }
-
- return ret;
-}
-
-const struct address_space_operations jfs_aops = {
- .readpage = jfs_readpage,
- .readpages = jfs_readpages,
- .writepage = jfs_writepage,
- .writepages = jfs_writepages,
- .write_begin = jfs_write_begin,
- .write_end = nobh_write_end,
- .bmap = jfs_bmap,
- .direct_IO = jfs_direct_IO,
-};
-
-/*
- * Guts of jfs_truncate. Called with locks already held. Can be called
- * with directory for truncating directory index table.
- */
-void jfs_truncate_nolock(struct inode *ip, loff_t length)
-{
- loff_t newsize;
- tid_t tid;
-
- ASSERT(length >= 0);
-
- if (test_cflag(COMMIT_Nolink, ip)) {
- xtTruncate(0, ip, length, COMMIT_WMAP);
- return;
- }
-
- do {
- tid = txBegin(ip->i_sb, 0);
-
- /*
- * The commit_mutex cannot be taken before txBegin.
- * txBegin may block and there is a chance the inode
- * could be marked dirty and need to be committed
- * before txBegin unblocks
- */
- mutex_lock(&JFS_IP(ip)->commit_mutex);
-
- newsize = xtTruncate(tid, ip, length,
- COMMIT_TRUNCATE | COMMIT_PWMAP);
- if (newsize < 0) {
- txEnd(tid);
- mutex_unlock(&JFS_IP(ip)->commit_mutex);
- break;
- }
-
- ip->i_mtime = ip->i_ctime = CURRENT_TIME;
- mark_inode_dirty(ip);
-
- txCommit(tid, 1, &ip, 0);
- txEnd(tid);
- mutex_unlock(&JFS_IP(ip)->commit_mutex);
- } while (newsize > length); /* Truncate isn't always atomic */
-}
-
-void jfs_truncate(struct inode *ip)
-{
- jfs_info("jfs_truncate: size = 0x%lx", (ulong) ip->i_size);
-
- nobh_truncate_page(ip->i_mapping, ip->i_size, jfs_get_block);
-
- IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
- jfs_truncate_nolock(ip, ip->i_size);
- IWRITE_UNLOCK(ip);
-}