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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/jfs/inode.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
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.c | 414 |
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); -} |