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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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fa3241d24c
ext2 inode attributes with relevance for jfs: 'a' EXT2_APPEND_FL -> append only 'i' EXT2_IMMUTABLE_FL -> immutable file 's' EXT2_SECRM_FL -> zero file 'u' EXT2_UNRM_FL -> allow for unrm 'A' EXT2_NOATIME_FL -> no access time 'D' EXT2_DIRSYNC_FL -> dirsync 'S' EXT2_SYNC_FL -> sync overview of jfs flags (partially for OS/2) value (OS/2) Linux ext2 attrs ------------------------------------------------ 0x00010000 IFJOURNAL - 0x00020000 ISPARSE used 0x00040000 INLINEEA used 0x00080000 - - JFS_NOATIME_FL 0x00100000 - - JFS_DIRSYNC_FL 0x00200000 - - JFS_SYNC_FL 0x00400000 - - JFS_SECRM_FL 0x00800000 ISWAPFILE - JFS_UNRM_FL 0x01000000 - - JFS_APPEND_FL 0x02000000 IREADONLY - JFS_IMMUTABLE_FL 0x04000000 IHIDDEN - - 0x08000000 ISYSTEM - - 0x10000000 - - 0x20000000 IDIRECTORY used 0x40000000 IARCHIVE - 0x80000000 INEWNAME - the implementation is straight forward, except for the fact that the attributes have to be mapped to match with the ext2 ones to avoid a separate tool for manipulating them (this could be avoided when using a separate flag field in the on-disk representation, but the overhead is minimal) a special jfs_ioctl is added to allow for the new JFS_IOC_GETFLAGS and JFS_IOC_SETFLAGS calls. a helper function jfs_set_inode_flags() to transfer the flags from the on-disk version to the inode minor changes to allow flag inheritance on inode creation, as well as a cleanup of the on-disk flags (including the new ones) beforementioned helper to map between ext2 and jfs versions of the new flags ... the JFS_SECRM_FL and JFS_UNRM_FL are not done yet and I'm not 100% sure they are worth the effort, the rest seems to work out of the box ... Signed-off-by: Herbert Poetzl <herbert@13thfloor.at> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2004
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/quotaops.h>
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#include "jfs_incore.h"
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#include "jfs_inode.h"
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#include "jfs_filsys.h"
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#include "jfs_imap.h"
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#include "jfs_dinode.h"
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#include "jfs_debug.h"
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void jfs_set_inode_flags(struct inode *inode)
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{
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unsigned int flags = JFS_IP(inode)->mode2;
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inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
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S_NOATIME | S_DIRSYNC | S_SYNC);
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if (flags & JFS_IMMUTABLE_FL)
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inode->i_flags |= S_IMMUTABLE;
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if (flags & JFS_APPEND_FL)
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inode->i_flags |= S_APPEND;
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if (flags & JFS_NOATIME_FL)
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inode->i_flags |= S_NOATIME;
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if (flags & JFS_DIRSYNC_FL)
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inode->i_flags |= S_DIRSYNC;
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if (flags & JFS_SYNC_FL)
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inode->i_flags |= S_SYNC;
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}
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/*
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* NAME: ialloc()
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*
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* FUNCTION: Allocate a new inode
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*
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*/
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struct inode *ialloc(struct inode *parent, umode_t mode)
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{
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struct super_block *sb = parent->i_sb;
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struct inode *inode;
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struct jfs_inode_info *jfs_inode;
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int rc;
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inode = new_inode(sb);
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if (!inode) {
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jfs_warn("ialloc: new_inode returned NULL!");
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return inode;
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}
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jfs_inode = JFS_IP(inode);
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rc = diAlloc(parent, S_ISDIR(mode), inode);
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if (rc) {
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jfs_warn("ialloc: diAlloc returned %d!", rc);
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make_bad_inode(inode);
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iput(inode);
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return NULL;
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}
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inode->i_uid = current->fsuid;
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if (parent->i_mode & S_ISGID) {
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inode->i_gid = parent->i_gid;
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if (S_ISDIR(mode))
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mode |= S_ISGID;
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} else
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inode->i_gid = current->fsgid;
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/*
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* Allocate inode to quota.
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*/
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if (DQUOT_ALLOC_INODE(inode)) {
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DQUOT_DROP(inode);
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inode->i_flags |= S_NOQUOTA;
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inode->i_nlink = 0;
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iput(inode);
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return NULL;
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}
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inode->i_mode = mode;
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/* inherit flags from parent */
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jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
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if (S_ISDIR(mode)) {
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jfs_inode->mode2 |= IDIRECTORY;
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jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
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}
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else if (S_ISLNK(mode))
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jfs_inode->mode2 &=
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~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
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else
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jfs_inode->mode2 |= INLINEEA | ISPARSE;
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jfs_inode->mode2 |= mode;
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inode->i_blksize = sb->s_blocksize;
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inode->i_blocks = 0;
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inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
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jfs_inode->otime = inode->i_ctime.tv_sec;
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inode->i_generation = JFS_SBI(sb)->gengen++;
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jfs_inode->cflag = 0;
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/* Zero remaining fields */
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memset(&jfs_inode->acl, 0, sizeof(dxd_t));
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memset(&jfs_inode->ea, 0, sizeof(dxd_t));
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jfs_inode->next_index = 0;
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jfs_inode->acltype = 0;
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jfs_inode->btorder = 0;
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jfs_inode->btindex = 0;
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jfs_inode->bxflag = 0;
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jfs_inode->blid = 0;
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jfs_inode->atlhead = 0;
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jfs_inode->atltail = 0;
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jfs_inode->xtlid = 0;
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jfs_set_inode_flags(inode);
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jfs_info("ialloc returns inode = 0x%p\n", inode);
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return inode;
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}
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