From 392e8802486cb573b916e746010e141a75f507e6 Mon Sep 17 00:00:00 2001 From: Kevin Date: Sat, 15 Nov 2014 09:58:27 +0800 Subject: init android origin source code --- ANDROID_3.4.5/fs/ext2/file.c | 107 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 ANDROID_3.4.5/fs/ext2/file.c (limited to 'ANDROID_3.4.5/fs/ext2/file.c') diff --git a/ANDROID_3.4.5/fs/ext2/file.c b/ANDROID_3.4.5/fs/ext2/file.c new file mode 100644 index 00000000..a5b3a5db --- /dev/null +++ b/ANDROID_3.4.5/fs/ext2/file.c @@ -0,0 +1,107 @@ +/* + * linux/fs/ext2/file.c + * + * Copyright (C) 1992, 1993, 1994, 1995 + * Remy Card (card@masi.ibp.fr) + * Laboratoire MASI - Institut Blaise Pascal + * Universite Pierre et Marie Curie (Paris VI) + * + * from + * + * linux/fs/minix/file.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * + * ext2 fs regular file handling primitives + * + * 64-bit file support on 64-bit platforms by Jakub Jelinek + * (jj@sunsite.ms.mff.cuni.cz) + */ + +#include +#include +#include +#include "ext2.h" +#include "xattr.h" +#include "acl.h" + +/* + * Called when filp is released. This happens when all file descriptors + * for a single struct file are closed. Note that different open() calls + * for the same file yield different struct file structures. + */ +static int ext2_release_file (struct inode * inode, struct file * filp) +{ + if (filp->f_mode & FMODE_WRITE) { + mutex_lock(&EXT2_I(inode)->truncate_mutex); + ext2_discard_reservation(inode); + mutex_unlock(&EXT2_I(inode)->truncate_mutex); + } + return 0; +} + +int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync) +{ + int ret; + struct super_block *sb = file->f_mapping->host->i_sb; + struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; + + ret = generic_file_fsync(file, start, end, datasync); + if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) { + /* We don't really know where the IO error happened... */ + ext2_error(sb, __func__, + "detected IO error when writing metadata buffers"); + ret = -EIO; + } + return ret; +} + +/* + * We have mostly NULL's here: the current defaults are ok for + * the ext2 filesystem. + */ +const struct file_operations ext2_file_operations = { + .llseek = generic_file_llseek, + .read = do_sync_read, + .write = do_sync_write, + .aio_read = generic_file_aio_read, + .aio_write = generic_file_aio_write, + .unlocked_ioctl = ext2_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = ext2_compat_ioctl, +#endif + .mmap = generic_file_mmap, + .open = dquot_file_open, + .release = ext2_release_file, + .fsync = ext2_fsync, + .splice_read = generic_file_splice_read, + .splice_write = generic_file_splice_write, +}; + +#ifdef CONFIG_EXT2_FS_XIP +const struct file_operations ext2_xip_file_operations = { + .llseek = generic_file_llseek, + .read = xip_file_read, + .write = xip_file_write, + .unlocked_ioctl = ext2_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = ext2_compat_ioctl, +#endif + .mmap = xip_file_mmap, + .open = dquot_file_open, + .release = ext2_release_file, + .fsync = ext2_fsync, +}; +#endif + +const struct inode_operations ext2_file_inode_operations = { +#ifdef CONFIG_EXT2_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = ext2_listxattr, + .removexattr = generic_removexattr, +#endif + .setattr = ext2_setattr, + .get_acl = ext2_get_acl, + .fiemap = ext2_fiemap, +}; -- cgit