/*
* NAME: jfs_mount_rw(sb, remount)
*
* FUNCTION: Completes read-write mount, or remounts read-only volume
* as read-write
*/
int jfs_mount_rw(struct super_block *sb, int remount)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
int rc;
/*
* If we are re-mounting a previously read-only volume, we want to
* re-read the inode and block maps, since fsck.jfs may have updated
* them.
*/
if (remount) {
if (chkSuper(sb) || (sbi->state != FM_CLEAN))
return -EINVAL;
truncate_inode_pages(sbi->ipimap->i_mapping, 0);
truncate_inode_pages(sbi->ipbmap->i_mapping, 0);
diUnmount(sbi->ipimap, 1);
if ((rc = diMount(sbi->ipimap))) {
jfs_err("jfs_mount_rw: diMount failed!");
return rc;
}
dbUnmount(sbi->ipbmap, 1);
if ((rc = dbMount(sbi->ipbmap))) {
jfs_err("jfs_mount_rw: dbMount failed!");
return rc;
}
}
/*
* open/initialize log
*/
if ((rc = lmLogOpen(sb)))
return rc;
/*
* update file system superblock;
*/
if ((rc = updateSuper(sb, FM_MOUNT))) {
jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);
lmLogClose(sb);
return rc;
}
/*
* write MOUNT log record of the file system
*/
logMOUNT(sb);
/*
* Set page cache allocation policy
*/
mapping_set_gfp_mask(sb->s_bdev->bd_inode->i_mapping, GFP_NOFS);
return rc;
}
int jfs_umount(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipimap = sbi->ipimap;
struct inode *ipaimap = sbi->ipaimap;
struct inode *ipaimap2 = sbi->ipaimap2;
struct jfs_log *log;
int rc = 0;
jfs_info("UnMount JFS: sb:0x%p", sb);
if ((log = sbi->log))
/*
* Wait for outstanding transactions to be written to log:
*/
jfs_flush_journal(log, 2);
diUnmount(ipimap, 0);
diFreeSpecial(ipimap);
sbi->ipimap = NULL;
ipaimap2 = sbi->ipaimap2;
if (ipaimap2) {
diUnmount(ipaimap2, 0);
diFreeSpecial(ipaimap2);
sbi->ipaimap2 = NULL;
}
ipaimap = sbi->ipaimap;
diUnmount(ipaimap, 0);
diFreeSpecial(ipaimap);
sbi->ipaimap = NULL;
dbUnmount(ipbmap, 0);
diFreeSpecial(ipbmap);
sbi->ipimap = NULL;
filemap_write_and_wait(sbi->direct_inode->i_mapping);
if (log) {
updateSuper(sb, FM_CLEAN);
rc = lmLogClose(sb);
}
jfs_info("UnMount JFS Complete: rc = %d", rc);
return rc;
}
int jfs_mount_rw(struct super_block *sb, int remount)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
int rc;
if (remount) {
if (chkSuper(sb) || (sbi->state != FM_CLEAN))
return -EINVAL;
truncate_inode_pages(sbi->ipimap->i_mapping, 0);
truncate_inode_pages(sbi->ipbmap->i_mapping, 0);
diUnmount(sbi->ipimap, 1);
if ((rc = diMount(sbi->ipimap))) {
jfs_err("jfs_mount_rw: diMount failed!");
return rc;
}
dbUnmount(sbi->ipbmap, 1);
if ((rc = dbMount(sbi->ipbmap))) {
jfs_err("jfs_mount_rw: dbMount failed!");
return rc;
}
}
if ((rc = lmLogOpen(sb)))
return rc;
if ((rc = updateSuper(sb, FM_MOUNT))) {
jfs_err("jfs_mount: updateSuper failed w/rc = %d", rc);
lmLogClose(sb);
return rc;
}
logMOUNT(sb);
return rc;
}
/*
* NAME: jfs_mount(sb)
*
* FUNCTION: vfs_mount()
*
* PARAMETER: sb - super block
*
* RETURN: -EBUSY - device already mounted or open for write
* -EBUSY - cvrdvp already mounted;
* -EBUSY - mount table full
* -ENOTDIR- cvrdvp not directory on a device mount
* -ENXIO - device open failure
*/
int jfs_mount(struct super_block *sb)
{
int rc = 0; /* Return code */
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipaimap = NULL;
struct inode *ipaimap2 = NULL;
struct inode *ipimap = NULL;
struct inode *ipbmap = NULL;
/*
* read/validate superblock
* (initialize mount inode from the superblock)
*/
if ((rc = chkSuper(sb))) {
goto errout20;
}
ipaimap = diReadSpecial(sb, AGGREGATE_I, 0);
if (ipaimap == NULL) {
jfs_err("jfs_mount: Faild to read AGGREGATE_I");
rc = -EIO;
goto errout20;
}
sbi->ipaimap = ipaimap;
jfs_info("jfs_mount: ipaimap:0x%p", ipaimap);
/*
* initialize aggregate inode allocation map
*/
if ((rc = diMount(ipaimap))) {
jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);
goto errout21;
}
/*
* open aggregate block allocation map
*/
ipbmap = diReadSpecial(sb, BMAP_I, 0);
if (ipbmap == NULL) {
rc = -EIO;
goto errout22;
}
jfs_info("jfs_mount: ipbmap:0x%p", ipbmap);
sbi->ipbmap = ipbmap;
/*
* initialize aggregate block allocation map
*/
if ((rc = dbMount(ipbmap))) {
jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);
goto errout22;
}
/*
* open the secondary aggregate inode allocation map
*
* This is a duplicate of the aggregate inode allocation map.
*
* hand craft a vfs in the same fashion as we did to read ipaimap.
* By adding INOSPEREXT (32) to the inode number, we are telling
* diReadSpecial that we are reading from the secondary aggregate
* inode table. This also creates a unique entry in the inode hash
* table.
*/
if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {
ipaimap2 = diReadSpecial(sb, AGGREGATE_I, 1);
if (ipaimap2 == 0) {
jfs_err("jfs_mount: Faild to read AGGREGATE_I");
rc = -EIO;
goto errout35;
}
sbi->ipaimap2 = ipaimap2;
jfs_info("jfs_mount: ipaimap2:0x%p", ipaimap2);
/*
* initialize secondary aggregate inode allocation map
*/
if ((rc = diMount(ipaimap2))) {
jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",
rc);
goto errout35;
}
} else
/* Secondary aggregate inode table is not valid */
sbi->ipaimap2 = NULL;
/*
* mount (the only/single) fileset
*/
/*
* open fileset inode allocation map (aka fileset inode)
*/
ipimap = diReadSpecial(sb, FILESYSTEM_I, 0);
if (ipimap == NULL) {
jfs_err("jfs_mount: Failed to read FILESYSTEM_I");
/* open fileset secondary inode allocation map */
rc = -EIO;
goto errout40;
}
jfs_info("jfs_mount: ipimap:0x%p", ipimap);
/* map further access of per fileset inodes by the fileset inode */
sbi->ipimap = ipimap;
/* initialize fileset inode allocation map */
if ((rc = diMount(ipimap))) {
jfs_err("jfs_mount: diMount failed w/rc = %d", rc);
goto errout41;
}
goto out;
/*
* unwind on error
*/
errout41: /* close fileset inode allocation map inode */
diFreeSpecial(ipimap);
errout40: /* fileset closed */
/* close secondary aggregate inode allocation map */
if (ipaimap2) {
diUnmount(ipaimap2, 1);
diFreeSpecial(ipaimap2);
}
errout35:
/* close aggregate block allocation map */
dbUnmount(ipbmap, 1);
diFreeSpecial(ipbmap);
errout22: /* close aggregate inode allocation map */
diUnmount(ipaimap, 1);
errout21: /* close aggregate inodes */
diFreeSpecial(ipaimap);
errout20: /* aggregate closed */
out:
if (rc)
jfs_err("Mount JFS Failure: %d", rc);
return rc;
}
/*
* NAME: jfs_umount(vfsp, flags, crp)
*
* FUNCTION: vfs_umount()
*
* PARAMETERS: vfsp - virtual file system pointer
* flags - unmount for shutdown
* crp - credential
*
* RETURN : EBUSY - device has open files
*/
int jfs_umount(struct super_block *sb)
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipbmap = sbi->ipbmap;
struct inode *ipimap = sbi->ipimap;
struct inode *ipaimap = sbi->ipaimap;
struct inode *ipaimap2 = sbi->ipaimap2;
struct jfs_log *log;
int rc = 0;
jfs_info("UnMount JFS: sb:0x%p", sb);
/*
* update superblock and close log
*
* if mounted read-write and log based recovery was enabled
*/
if ((log = sbi->log))
/*
* Wait for outstanding transactions to be written to log:
*/
jfs_flush_journal(log, 1);
/*
* close fileset inode allocation map (aka fileset inode)
*/
diUnmount(ipimap, 0);
diFreeSpecial(ipimap);
sbi->ipimap = NULL;
/*
* close secondary aggregate inode allocation map
*/
ipaimap2 = sbi->ipaimap2;
if (ipaimap2) {
diUnmount(ipaimap2, 0);
diFreeSpecial(ipaimap2);
sbi->ipaimap2 = NULL;
}
/*
* close aggregate inode allocation map
*/
ipaimap = sbi->ipaimap;
diUnmount(ipaimap, 0);
diFreeSpecial(ipaimap);
sbi->ipaimap = NULL;
/*
* close aggregate block allocation map
*/
dbUnmount(ipbmap, 0);
diFreeSpecial(ipbmap);
sbi->ipimap = NULL;
/*
* Make sure all metadata makes it to disk before we mark
* the superblock as clean
*/
filemap_write_and_wait(sbi->direct_inode->i_mapping);
/*
* ensure all file system file pages are propagated to their
* home blocks on disk (and their in-memory buffer pages are
* invalidated) BEFORE updating file system superblock state
* (to signify file system is unmounted cleanly, and thus in
* consistent state) and log superblock active file system
* list (to signify skip logredo()).
*/
if (log) { /* log = NULL if read-only mount */
updateSuper(sb, FM_CLEAN);
/*
* close log:
*
* remove file system from log active file system list.
*/
rc = lmLogClose(sb);
}
jfs_info("UnMount JFS Complete: rc = %d", rc);
return rc;
}
int jfs_mount(struct super_block *sb)
{
int rc = 0;
struct jfs_sb_info *sbi = JFS_SBI(sb);
struct inode *ipaimap = NULL;
struct inode *ipaimap2 = NULL;
struct inode *ipimap = NULL;
struct inode *ipbmap = NULL;
if ((rc = chkSuper(sb))) {
goto errout20;
}
ipaimap = diReadSpecial(sb, AGGREGATE_I, 0);
if (ipaimap == NULL) {
jfs_err("jfs_mount: Failed to read AGGREGATE_I");
rc = -EIO;
goto errout20;
}
sbi->ipaimap = ipaimap;
jfs_info("jfs_mount: ipaimap:0x%p", ipaimap);
if ((rc = diMount(ipaimap))) {
jfs_err("jfs_mount: diMount(ipaimap) failed w/rc = %d", rc);
goto errout21;
}
ipbmap = diReadSpecial(sb, BMAP_I, 0);
if (ipbmap == NULL) {
rc = -EIO;
goto errout22;
}
jfs_info("jfs_mount: ipbmap:0x%p", ipbmap);
sbi->ipbmap = ipbmap;
if ((rc = dbMount(ipbmap))) {
jfs_err("jfs_mount: dbMount failed w/rc = %d", rc);
goto errout22;
}
if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {
ipaimap2 = diReadSpecial(sb, AGGREGATE_I, 1);
if (!ipaimap2) {
jfs_err("jfs_mount: Failed to read AGGREGATE_I");
rc = -EIO;
goto errout35;
}
sbi->ipaimap2 = ipaimap2;
jfs_info("jfs_mount: ipaimap2:0x%p", ipaimap2);
if ((rc = diMount(ipaimap2))) {
jfs_err("jfs_mount: diMount(ipaimap2) failed, rc = %d",
rc);
goto errout35;
}
} else
sbi->ipaimap2 = NULL;
ipimap = diReadSpecial(sb, FILESYSTEM_I, 0);
if (ipimap == NULL) {
jfs_err("jfs_mount: Failed to read FILESYSTEM_I");
rc = -EIO;
goto errout40;
}
jfs_info("jfs_mount: ipimap:0x%p", ipimap);
sbi->ipimap = ipimap;
if ((rc = diMount(ipimap))) {
jfs_err("jfs_mount: diMount failed w/rc = %d", rc);
goto errout41;
}
goto out;
errout41:
diFreeSpecial(ipimap);
errout40:
if (ipaimap2) {
diUnmount(ipaimap2, 1);
diFreeSpecial(ipaimap2);
}
errout35:
dbUnmount(ipbmap, 1);
diFreeSpecial(ipbmap);
errout22:
diUnmount(ipaimap, 1);
errout21:
diFreeSpecial(ipaimap);
errout20:
out:
if (rc)
jfs_err("Mount JFS Failure: %d", rc);
return rc;
}
