| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) International Business Machines Corp., 2000-2004 |
| * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
| */ |
| |
| #include <linux/fs.h> |
| #include <linux/namei.h> |
| #include <linux/ctype.h> |
| #include <linux/quotaops.h> |
| #include <linux/exportfs.h> |
| #include "jfs_incore.h" |
| #include "jfs_superblock.h" |
| #include "jfs_inode.h" |
| #include "jfs_dinode.h" |
| #include "jfs_dmap.h" |
| #include "jfs_unicode.h" |
| #include "jfs_metapage.h" |
| #include "jfs_xattr.h" |
| #include "jfs_acl.h" |
| #include "jfs_debug.h" |
| |
| /* |
| * forward references |
| */ |
| const struct dentry_operations jfs_ci_dentry_operations; |
| |
| static s64 commitZeroLink(tid_t, struct inode *); |
| |
| /* |
| * NAME: free_ea_wmap(inode) |
| * |
| * FUNCTION: free uncommitted extended attributes from working map |
| * |
| */ |
| static inline void free_ea_wmap(struct inode *inode) |
| { |
| dxd_t *ea = &JFS_IP(inode)->ea; |
| |
| if (ea->flag & DXD_EXTENT) { |
| /* free EA pages from cache */ |
| invalidate_dxd_metapages(inode, *ea); |
| dbFree(inode, addressDXD(ea), lengthDXD(ea)); |
| } |
| ea->flag = 0; |
| } |
| |
| /* |
| * NAME: jfs_create(dip, dentry, mode) |
| * |
| * FUNCTION: create a regular file in the parent directory <dip> |
| * with name = <from dentry> and mode = <mode> |
| * |
| * PARAMETER: dip - parent directory vnode |
| * dentry - dentry of new file |
| * mode - create mode (rwxrwxrwx). |
| * nd- nd struct |
| * |
| * RETURN: Errors from subroutines |
| * |
| */ |
| static int jfs_create(struct mnt_idmap *idmap, struct inode *dip, |
| struct dentry *dentry, umode_t mode, bool excl) |
| { |
| int rc = 0; |
| tid_t tid; /* transaction id */ |
| struct inode *ip = NULL; /* child directory inode */ |
| ino_t ino; |
| struct component_name dname; /* child directory name */ |
| struct btstack btstack; |
| struct inode *iplist[2]; |
| struct tblock *tblk; |
| |
| jfs_info("jfs_create: dip:0x%p name:%pd", dip, dentry); |
| |
| rc = dquot_initialize(dip); |
| if (rc) |
| goto out1; |
| |
| /* |
| * search parent directory for entry/freespace |
| * (dtSearch() returns parent directory page pinned) |
| */ |
| if ((rc = get_UCSname(&dname, dentry))) |
| goto out1; |
| |
| /* |
| * Either iAlloc() or txBegin() may block. Deadlock can occur if we |
| * block there while holding dtree page, so we allocate the inode & |
| * begin the transaction before we search the directory. |
| */ |
| ip = ialloc(dip, mode); |
| if (IS_ERR(ip)) { |
| rc = PTR_ERR(ip); |
| goto out2; |
| } |
| |
| tid = txBegin(dip->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| rc = jfs_init_acl(tid, ip, dip); |
| if (rc) |
| goto out3; |
| |
| rc = jfs_init_security(tid, ip, dip, &dentry->d_name); |
| if (rc) { |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
| jfs_err("jfs_create: dtSearch returned %d", rc); |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_CREATE; |
| tblk->ino = ip->i_ino; |
| tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| |
| iplist[0] = dip; |
| iplist[1] = ip; |
| |
| /* |
| * initialize the child XAD tree root in-line in inode |
| */ |
| xtInitRoot(tid, ip); |
| |
| /* |
| * create entry in parent directory for child directory |
| * (dtInsert() releases parent directory page) |
| */ |
| ino = ip->i_ino; |
| if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { |
| if (rc == -EIO) { |
| jfs_err("jfs_create: dtInsert returned -EIO"); |
| txAbort(tid, 1); /* Marks Filesystem dirty */ |
| } else |
| txAbort(tid, 0); /* Filesystem full */ |
| goto out3; |
| } |
| |
| ip->i_op = &jfs_file_inode_operations; |
| ip->i_fop = &jfs_file_operations; |
| ip->i_mapping->a_ops = &jfs_aops; |
| |
| mark_inode_dirty(ip); |
| |
| dip->i_mtime = inode_set_ctime_current(dip); |
| |
| mark_inode_dirty(dip); |
| |
| rc = txCommit(tid, 2, &iplist[0], 0); |
| |
| out3: |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| if (rc) { |
| free_ea_wmap(ip); |
| clear_nlink(ip); |
| discard_new_inode(ip); |
| } else { |
| d_instantiate_new(dentry, ip); |
| } |
| |
| out2: |
| free_UCSname(&dname); |
| |
| out1: |
| |
| jfs_info("jfs_create: rc:%d", rc); |
| return rc; |
| } |
| |
| |
| /* |
| * NAME: jfs_mkdir(dip, dentry, mode) |
| * |
| * FUNCTION: create a child directory in the parent directory <dip> |
| * with name = <from dentry> and mode = <mode> |
| * |
| * PARAMETER: dip - parent directory vnode |
| * dentry - dentry of child directory |
| * mode - create mode (rwxrwxrwx). |
| * |
| * RETURN: Errors from subroutines |
| * |
| * note: |
| * EACCES: user needs search+write permission on the parent directory |
| */ |
| static int jfs_mkdir(struct mnt_idmap *idmap, struct inode *dip, |
| struct dentry *dentry, umode_t mode) |
| { |
| int rc = 0; |
| tid_t tid; /* transaction id */ |
| struct inode *ip = NULL; /* child directory inode */ |
| ino_t ino; |
| struct component_name dname; /* child directory name */ |
| struct btstack btstack; |
| struct inode *iplist[2]; |
| struct tblock *tblk; |
| |
| jfs_info("jfs_mkdir: dip:0x%p name:%pd", dip, dentry); |
| |
| rc = dquot_initialize(dip); |
| if (rc) |
| goto out1; |
| |
| /* |
| * search parent directory for entry/freespace |
| * (dtSearch() returns parent directory page pinned) |
| */ |
| if ((rc = get_UCSname(&dname, dentry))) |
| goto out1; |
| |
| /* |
| * Either iAlloc() or txBegin() may block. Deadlock can occur if we |
| * block there while holding dtree page, so we allocate the inode & |
| * begin the transaction before we search the directory. |
| */ |
| ip = ialloc(dip, S_IFDIR | mode); |
| if (IS_ERR(ip)) { |
| rc = PTR_ERR(ip); |
| goto out2; |
| } |
| |
| tid = txBegin(dip->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| rc = jfs_init_acl(tid, ip, dip); |
| if (rc) |
| goto out3; |
| |
| rc = jfs_init_security(tid, ip, dip, &dentry->d_name); |
| if (rc) { |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) { |
| jfs_err("jfs_mkdir: dtSearch returned %d", rc); |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_CREATE; |
| tblk->ino = ip->i_ino; |
| tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| |
| iplist[0] = dip; |
| iplist[1] = ip; |
| |
| /* |
| * initialize the child directory in-line in inode |
| */ |
| dtInitRoot(tid, ip, dip->i_ino); |
| |
| /* |
| * create entry in parent directory for child directory |
| * (dtInsert() releases parent directory page) |
| */ |
| ino = ip->i_ino; |
| if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) { |
| if (rc == -EIO) { |
| jfs_err("jfs_mkdir: dtInsert returned -EIO"); |
| txAbort(tid, 1); /* Marks Filesystem dirty */ |
| } else |
| txAbort(tid, 0); /* Filesystem full */ |
| goto out3; |
| } |
| |
| set_nlink(ip, 2); /* for '.' */ |
| ip->i_op = &jfs_dir_inode_operations; |
| ip->i_fop = &jfs_dir_operations; |
| |
| mark_inode_dirty(ip); |
| |
| /* update parent directory inode */ |
| inc_nlink(dip); /* for '..' from child directory */ |
| dip->i_mtime = inode_set_ctime_current(dip); |
| mark_inode_dirty(dip); |
| |
| rc = txCommit(tid, 2, &iplist[0], 0); |
| |
| out3: |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| if (rc) { |
| free_ea_wmap(ip); |
| clear_nlink(ip); |
| discard_new_inode(ip); |
| } else { |
| d_instantiate_new(dentry, ip); |
| } |
| |
| out2: |
| free_UCSname(&dname); |
| |
| |
| out1: |
| |
| jfs_info("jfs_mkdir: rc:%d", rc); |
| return rc; |
| } |
| |
| /* |
| * NAME: jfs_rmdir(dip, dentry) |
| * |
| * FUNCTION: remove a link to child directory |
| * |
| * PARAMETER: dip - parent inode |
| * dentry - child directory dentry |
| * |
| * RETURN: -EINVAL - if name is . or .. |
| * -EINVAL - if . or .. exist but are invalid. |
| * errors from subroutines |
| * |
| * note: |
| * if other threads have the directory open when the last link |
| * is removed, the "." and ".." entries, if present, are removed before |
| * rmdir() returns and no new entries may be created in the directory, |
| * but the directory is not removed until the last reference to |
| * the directory is released (cf.unlink() of regular file). |
| */ |
| static int jfs_rmdir(struct inode *dip, struct dentry *dentry) |
| { |
| int rc; |
| tid_t tid; /* transaction id */ |
| struct inode *ip = d_inode(dentry); |
| ino_t ino; |
| struct component_name dname; |
| struct inode *iplist[2]; |
| struct tblock *tblk; |
| |
| jfs_info("jfs_rmdir: dip:0x%p name:%pd", dip, dentry); |
| |
| /* Init inode for quota operations. */ |
| rc = dquot_initialize(dip); |
| if (rc) |
| goto out; |
| rc = dquot_initialize(ip); |
| if (rc) |
| goto out; |
| |
| /* directory must be empty to be removed */ |
| if (!dtEmpty(ip)) { |
| rc = -ENOTEMPTY; |
| goto out; |
| } |
| |
| if ((rc = get_UCSname(&dname, dentry))) { |
| goto out; |
| } |
| |
| tid = txBegin(dip->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| iplist[0] = dip; |
| iplist[1] = ip; |
| |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_DELETE; |
| tblk->u.ip = ip; |
| |
| /* |
| * delete the entry of target directory from parent directory |
| */ |
| ino = ip->i_ino; |
| if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { |
| jfs_err("jfs_rmdir: dtDelete returned %d", rc); |
| if (rc == -EIO) |
| txAbort(tid, 1); |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| |
| goto out2; |
| } |
| |
| /* update parent directory's link count corresponding |
| * to ".." entry of the target directory deleted |
| */ |
| dip->i_mtime = inode_set_ctime_current(dip); |
| inode_dec_link_count(dip); |
| |
| /* |
| * OS/2 could have created EA and/or ACL |
| */ |
| /* free EA from both persistent and working map */ |
| if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { |
| /* free EA pages */ |
| txEA(tid, ip, &JFS_IP(ip)->ea, NULL); |
| } |
| JFS_IP(ip)->ea.flag = 0; |
| |
| /* free ACL from both persistent and working map */ |
| if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { |
| /* free ACL pages */ |
| txEA(tid, ip, &JFS_IP(ip)->acl, NULL); |
| } |
| JFS_IP(ip)->acl.flag = 0; |
| |
| /* mark the target directory as deleted */ |
| clear_nlink(ip); |
| mark_inode_dirty(ip); |
| |
| rc = txCommit(tid, 2, &iplist[0], 0); |
| |
| txEnd(tid); |
| |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| |
| /* |
| * Truncating the directory index table is not guaranteed. It |
| * may need to be done iteratively |
| */ |
| if (test_cflag(COMMIT_Stale, dip)) { |
| if (dip->i_size > 1) |
| jfs_truncate_nolock(dip, 0); |
| |
| clear_cflag(COMMIT_Stale, dip); |
| } |
| |
| out2: |
| free_UCSname(&dname); |
| |
| out: |
| jfs_info("jfs_rmdir: rc:%d", rc); |
| return rc; |
| } |
| |
| /* |
| * NAME: jfs_unlink(dip, dentry) |
| * |
| * FUNCTION: remove a link to object <vp> named by <name> |
| * from parent directory <dvp> |
| * |
| * PARAMETER: dip - inode of parent directory |
| * dentry - dentry of object to be removed |
| * |
| * RETURN: errors from subroutines |
| * |
| * note: |
| * temporary file: if one or more processes have the file open |
| * when the last link is removed, the link will be removed before |
| * unlink() returns, but the removal of the file contents will be |
| * postponed until all references to the files are closed. |
| * |
| * JFS does NOT support unlink() on directories. |
| * |
| */ |
| static int jfs_unlink(struct inode *dip, struct dentry *dentry) |
| { |
| int rc; |
| tid_t tid; /* transaction id */ |
| struct inode *ip = d_inode(dentry); |
| ino_t ino; |
| struct component_name dname; /* object name */ |
| struct inode *iplist[2]; |
| struct tblock *tblk; |
| s64 new_size = 0; |
| int commit_flag; |
| |
| jfs_info("jfs_unlink: dip:0x%p name:%pd", dip, dentry); |
| |
| /* Init inode for quota operations. */ |
| rc = dquot_initialize(dip); |
| if (rc) |
| goto out; |
| rc = dquot_initialize(ip); |
| if (rc) |
| goto out; |
| |
| if ((rc = get_UCSname(&dname, dentry))) |
| goto out; |
| |
| IWRITE_LOCK(ip, RDWRLOCK_NORMAL); |
| |
| tid = txBegin(dip->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| iplist[0] = dip; |
| iplist[1] = ip; |
| |
| /* |
| * delete the entry of target file from parent directory |
| */ |
| ino = ip->i_ino; |
| if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) { |
| jfs_err("jfs_unlink: dtDelete returned %d", rc); |
| if (rc == -EIO) |
| txAbort(tid, 1); /* Marks FS Dirty */ |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| IWRITE_UNLOCK(ip); |
| goto out1; |
| } |
| |
| ASSERT(ip->i_nlink); |
| |
| dip->i_mtime = inode_set_ctime_to_ts(dip, inode_set_ctime_current(ip)); |
| mark_inode_dirty(dip); |
| |
| /* update target's inode */ |
| inode_dec_link_count(ip); |
| |
| /* |
| * commit zero link count object |
| */ |
| if (ip->i_nlink == 0) { |
| assert(!test_cflag(COMMIT_Nolink, ip)); |
| /* free block resources */ |
| if ((new_size = commitZeroLink(tid, ip)) < 0) { |
| txAbort(tid, 1); /* Marks FS Dirty */ |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| IWRITE_UNLOCK(ip); |
| rc = new_size; |
| goto out1; |
| } |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_DELETE; |
| tblk->u.ip = ip; |
| } |
| |
| /* |
| * Incomplete truncate of file data can |
| * result in timing problems unless we synchronously commit the |
| * transaction. |
| */ |
| if (new_size) |
| commit_flag = COMMIT_SYNC; |
| else |
| commit_flag = 0; |
| |
| /* |
| * If xtTruncate was incomplete, commit synchronously to avoid |
| * timing complications |
| */ |
| rc = txCommit(tid, 2, &iplist[0], commit_flag); |
| |
| txEnd(tid); |
| |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| |
| while (new_size && (rc == 0)) { |
| tid = txBegin(dip->i_sb, 0); |
| mutex_lock(&JFS_IP(ip)->commit_mutex); |
| new_size = xtTruncate_pmap(tid, ip, new_size); |
| if (new_size < 0) { |
| txAbort(tid, 1); /* Marks FS Dirty */ |
| rc = new_size; |
| } else |
| rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC); |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| } |
| |
| if (ip->i_nlink == 0) |
| set_cflag(COMMIT_Nolink, ip); |
| |
| IWRITE_UNLOCK(ip); |
| |
| /* |
| * Truncating the directory index table is not guaranteed. It |
| * may need to be done iteratively |
| */ |
| if (test_cflag(COMMIT_Stale, dip)) { |
| if (dip->i_size > 1) |
| jfs_truncate_nolock(dip, 0); |
| |
| clear_cflag(COMMIT_Stale, dip); |
| } |
| |
| out1: |
| free_UCSname(&dname); |
| out: |
| jfs_info("jfs_unlink: rc:%d", rc); |
| return rc; |
| } |
| |
| /* |
| * NAME: commitZeroLink() |
| * |
| * FUNCTION: for non-directory, called by jfs_remove(), |
| * truncate a regular file, directory or symbolic |
| * link to zero length. return 0 if type is not |
| * one of these. |
| * |
| * if the file is currently associated with a VM segment |
| * only permanent disk and inode map resources are freed, |
| * and neither the inode nor indirect blocks are modified |
| * so that the resources can be later freed in the work |
| * map by ctrunc1. |
| * if there is no VM segment on entry, the resources are |
| * freed in both work and permanent map. |
| * (? for temporary file - memory object is cached even |
| * after no reference: |
| * reference count > 0 - ) |
| * |
| * PARAMETERS: cd - pointer to commit data structure. |
| * current inode is the one to truncate. |
| * |
| * RETURN: Errors from subroutines |
| */ |
| static s64 commitZeroLink(tid_t tid, struct inode *ip) |
| { |
| int filetype; |
| struct tblock *tblk; |
| |
| jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip); |
| |
| filetype = ip->i_mode & S_IFMT; |
| switch (filetype) { |
| case S_IFREG: |
| break; |
| case S_IFLNK: |
| /* fast symbolic link */ |
| if (ip->i_size < IDATASIZE) { |
| ip->i_size = 0; |
| return 0; |
| } |
| break; |
| default: |
| assert(filetype != S_IFDIR); |
| return 0; |
| } |
| |
| set_cflag(COMMIT_Freewmap, ip); |
| |
| /* mark transaction of block map update type */ |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_PMAP; |
| |
| /* |
| * free EA |
| */ |
| if (JFS_IP(ip)->ea.flag & DXD_EXTENT) |
| /* acquire maplock on EA to be freed from block map */ |
| txEA(tid, ip, &JFS_IP(ip)->ea, NULL); |
| |
| /* |
| * free ACL |
| */ |
| if (JFS_IP(ip)->acl.flag & DXD_EXTENT) |
| /* acquire maplock on EA to be freed from block map */ |
| txEA(tid, ip, &JFS_IP(ip)->acl, NULL); |
| |
| /* |
| * free xtree/data (truncate to zero length): |
| * free xtree/data pages from cache if COMMIT_PWMAP, |
| * free xtree/data blocks from persistent block map, and |
| * free xtree/data blocks from working block map if COMMIT_PWMAP; |
| */ |
| if (ip->i_size) |
| return xtTruncate_pmap(tid, ip, 0); |
| |
| return 0; |
| } |
| |
| |
| /* |
| * NAME: jfs_free_zero_link() |
| * |
| * FUNCTION: for non-directory, called by iClose(), |
| * free resources of a file from cache and WORKING map |
| * for a file previously committed with zero link count |
| * while associated with a pager object, |
| * |
| * PARAMETER: ip - pointer to inode of file. |
| */ |
| void jfs_free_zero_link(struct inode *ip) |
| { |
| int type; |
| |
| jfs_info("jfs_free_zero_link: ip = 0x%p", ip); |
| |
| /* return if not reg or symbolic link or if size is |
| * already ok. |
| */ |
| type = ip->i_mode & S_IFMT; |
| |
| switch (type) { |
| case S_IFREG: |
| break; |
| case S_IFLNK: |
| /* if its contained in inode nothing to do */ |
| if (ip->i_size < IDATASIZE) |
| return; |
| break; |
| default: |
| return; |
| } |
| |
| /* |
| * free EA |
| */ |
| if (JFS_IP(ip)->ea.flag & DXD_EXTENT) { |
| s64 xaddr = addressDXD(&JFS_IP(ip)->ea); |
| int xlen = lengthDXD(&JFS_IP(ip)->ea); |
| struct maplock maplock; /* maplock for COMMIT_WMAP */ |
| struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ |
| |
| /* free EA pages from cache */ |
| invalidate_dxd_metapages(ip, JFS_IP(ip)->ea); |
| |
| /* free EA extent from working block map */ |
| maplock.index = 1; |
| pxdlock = (struct pxd_lock *) & maplock; |
| pxdlock->flag = mlckFREEPXD; |
| PXDaddress(&pxdlock->pxd, xaddr); |
| PXDlength(&pxdlock->pxd, xlen); |
| txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); |
| } |
| |
| /* |
| * free ACL |
| */ |
| if (JFS_IP(ip)->acl.flag & DXD_EXTENT) { |
| s64 xaddr = addressDXD(&JFS_IP(ip)->acl); |
| int xlen = lengthDXD(&JFS_IP(ip)->acl); |
| struct maplock maplock; /* maplock for COMMIT_WMAP */ |
| struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */ |
| |
| invalidate_dxd_metapages(ip, JFS_IP(ip)->acl); |
| |
| /* free ACL extent from working block map */ |
| maplock.index = 1; |
| pxdlock = (struct pxd_lock *) & maplock; |
| pxdlock->flag = mlckFREEPXD; |
| PXDaddress(&pxdlock->pxd, xaddr); |
| PXDlength(&pxdlock->pxd, xlen); |
| txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP); |
| } |
| |
| /* |
| * free xtree/data (truncate to zero length): |
| * free xtree/data pages from cache, and |
| * free xtree/data blocks from working block map; |
| */ |
| if (ip->i_size) |
| xtTruncate(0, ip, 0, COMMIT_WMAP); |
| } |
| |
| /* |
| * NAME: jfs_link(vp, dvp, name, crp) |
| * |
| * FUNCTION: create a link to <vp> by the name = <name> |
| * in the parent directory <dvp> |
| * |
| * PARAMETER: vp - target object |
| * dvp - parent directory of new link |
| * name - name of new link to target object |
| * crp - credential |
| * |
| * RETURN: Errors from subroutines |
| * |
| * note: |
| * JFS does NOT support link() on directories (to prevent circular |
| * path in the directory hierarchy); |
| * EPERM: the target object is a directory, and either the caller |
| * does not have appropriate privileges or the implementation prohibits |
| * using link() on directories [XPG4.2]. |
| * |
| * JFS does NOT support links between file systems: |
| * EXDEV: target object and new link are on different file systems and |
| * implementation does not support links between file systems [XPG4.2]. |
| */ |
| static int jfs_link(struct dentry *old_dentry, |
| struct inode *dir, struct dentry *dentry) |
| { |
| int rc; |
| tid_t tid; |
| struct inode *ip = d_inode(old_dentry); |
| ino_t ino; |
| struct component_name dname; |
| struct btstack btstack; |
| struct inode *iplist[2]; |
| |
| jfs_info("jfs_link: %pd %pd", old_dentry, dentry); |
| |
| rc = dquot_initialize(dir); |
| if (rc) |
| goto out; |
| |
| if (isReadOnly(ip)) { |
| jfs_error(ip->i_sb, "read-only filesystem\n"); |
| return -EROFS; |
| } |
| |
| tid = txBegin(ip->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| /* |
| * scan parent directory for entry/freespace |
| */ |
| if ((rc = get_UCSname(&dname, dentry))) |
| goto out_tx; |
| |
| if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) |
| goto free_dname; |
| |
| /* |
| * create entry for new link in parent directory |
| */ |
| ino = ip->i_ino; |
| if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) |
| goto free_dname; |
| |
| /* update object inode */ |
| inc_nlink(ip); /* for new link */ |
| inode_set_ctime_current(ip); |
| dir->i_mtime = inode_set_ctime_current(dir); |
| mark_inode_dirty(dir); |
| ihold(ip); |
| |
| iplist[0] = ip; |
| iplist[1] = dir; |
| rc = txCommit(tid, 2, &iplist[0], 0); |
| |
| if (rc) { |
| drop_nlink(ip); /* never instantiated */ |
| iput(ip); |
| } else |
| d_instantiate(dentry, ip); |
| |
| free_dname: |
| free_UCSname(&dname); |
| |
| out_tx: |
| txEnd(tid); |
| |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dir)->commit_mutex); |
| |
| out: |
| jfs_info("jfs_link: rc:%d", rc); |
| return rc; |
| } |
| |
| /* |
| * NAME: jfs_symlink(dip, dentry, name) |
| * |
| * FUNCTION: creates a symbolic link to <symlink> by name <name> |
| * in directory <dip> |
| * |
| * PARAMETER: dip - parent directory vnode |
| * dentry - dentry of symbolic link |
| * name - the path name of the existing object |
| * that will be the source of the link |
| * |
| * RETURN: errors from subroutines |
| * |
| * note: |
| * ENAMETOOLONG: pathname resolution of a symbolic link produced |
| * an intermediate result whose length exceeds PATH_MAX [XPG4.2] |
| */ |
| |
| static int jfs_symlink(struct mnt_idmap *idmap, struct inode *dip, |
| struct dentry *dentry, const char *name) |
| { |
| int rc; |
| tid_t tid; |
| ino_t ino = 0; |
| struct component_name dname; |
| u32 ssize; /* source pathname size */ |
| struct btstack btstack; |
| struct inode *ip; |
| s64 xlen = 0; |
| int bmask = 0, xsize; |
| s64 xaddr; |
| struct metapage *mp; |
| struct super_block *sb; |
| struct tblock *tblk; |
| |
| struct inode *iplist[2]; |
| |
| jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name); |
| |
| rc = dquot_initialize(dip); |
| if (rc) |
| goto out1; |
| |
| ssize = strlen(name) + 1; |
| |
| /* |
| * search parent directory for entry/freespace |
| * (dtSearch() returns parent directory page pinned) |
| */ |
| |
| if ((rc = get_UCSname(&dname, dentry))) |
| goto out1; |
| |
| /* |
| * allocate on-disk/in-memory inode for symbolic link: |
| * (iAlloc() returns new, locked inode) |
| */ |
| ip = ialloc(dip, S_IFLNK | 0777); |
| if (IS_ERR(ip)) { |
| rc = PTR_ERR(ip); |
| goto out2; |
| } |
| |
| tid = txBegin(dip->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| rc = jfs_init_security(tid, ip, dip, &dentry->d_name); |
| if (rc) |
| goto out3; |
| |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_CREATE; |
| tblk->ino = ip->i_ino; |
| tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| |
| /* fix symlink access permission |
| * (dir_create() ANDs in the u.u_cmask, |
| * but symlinks really need to be 777 access) |
| */ |
| ip->i_mode |= 0777; |
| |
| /* |
| * write symbolic link target path name |
| */ |
| xtInitRoot(tid, ip); |
| |
| /* |
| * write source path name inline in on-disk inode (fast symbolic link) |
| */ |
| |
| if (ssize <= IDATASIZE) { |
| ip->i_op = &jfs_fast_symlink_inode_operations; |
| |
| ip->i_link = JFS_IP(ip)->i_inline_all; |
| memcpy(ip->i_link, name, ssize); |
| ip->i_size = ssize - 1; |
| |
| /* |
| * if symlink is > 128 bytes, we don't have the space to |
| * store inline extended attributes |
| */ |
| if (ssize > sizeof (JFS_IP(ip)->i_inline)) |
| JFS_IP(ip)->mode2 &= ~INLINEEA; |
| |
| jfs_info("jfs_symlink: fast symlink added ssize:%u name:%s ", |
| ssize, name); |
| } |
| /* |
| * write source path name in a single extent |
| */ |
| else { |
| jfs_info("jfs_symlink: allocate extent ip:0x%p", ip); |
| |
| ip->i_op = &jfs_symlink_inode_operations; |
| inode_nohighmem(ip); |
| ip->i_mapping->a_ops = &jfs_aops; |
| |
| /* |
| * even though the data of symlink object (source |
| * path name) is treated as non-journaled user data, |
| * it is read/written thru buffer cache for performance. |
| */ |
| sb = ip->i_sb; |
| bmask = JFS_SBI(sb)->bsize - 1; |
| xsize = (ssize + bmask) & ~bmask; |
| xaddr = 0; |
| xlen = xsize >> JFS_SBI(sb)->l2bsize; |
| if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) { |
| txAbort(tid, 0); |
| goto out3; |
| } |
| ip->i_size = ssize - 1; |
| while (ssize) { |
| /* This is kind of silly since PATH_MAX == 4K */ |
| u32 copy_size = min_t(u32, ssize, PSIZE); |
| |
| mp = get_metapage(ip, xaddr, PSIZE, 1); |
| |
| if (mp == NULL) { |
| xtTruncate(tid, ip, 0, COMMIT_PWMAP); |
| rc = -EIO; |
| txAbort(tid, 0); |
| goto out3; |
| } |
| memcpy(mp->data, name, copy_size); |
| flush_metapage(mp); |
| ssize -= copy_size; |
| name += copy_size; |
| xaddr += JFS_SBI(sb)->nbperpage; |
| } |
| } |
| |
| /* |
| * create entry for symbolic link in parent directory |
| */ |
| rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE); |
| if (rc == 0) { |
| ino = ip->i_ino; |
| rc = dtInsert(tid, dip, &dname, &ino, &btstack); |
| } |
| if (rc) { |
| if (xlen) |
| xtTruncate(tid, ip, 0, COMMIT_PWMAP); |
| txAbort(tid, 0); |
| /* discard new inode */ |
| goto out3; |
| } |
| |
| mark_inode_dirty(ip); |
| |
| dip->i_mtime = inode_set_ctime_current(dip); |
| mark_inode_dirty(dip); |
| /* |
| * commit update of parent directory and link object |
| */ |
| |
| iplist[0] = dip; |
| iplist[1] = ip; |
| rc = txCommit(tid, 2, &iplist[0], 0); |
| |
| out3: |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dip)->commit_mutex); |
| if (rc) { |
| free_ea_wmap(ip); |
| clear_nlink(ip); |
| discard_new_inode(ip); |
| } else { |
| d_instantiate_new(dentry, ip); |
| } |
| |
| out2: |
| free_UCSname(&dname); |
| |
| out1: |
| jfs_info("jfs_symlink: rc:%d", rc); |
| return rc; |
| } |
| |
| |
| /* |
| * NAME: jfs_rename |
| * |
| * FUNCTION: rename a file or directory |
| */ |
| static int jfs_rename(struct mnt_idmap *idmap, struct inode *old_dir, |
| struct dentry *old_dentry, struct inode *new_dir, |
| struct dentry *new_dentry, unsigned int flags) |
| { |
| struct btstack btstack; |
| ino_t ino; |
| struct component_name new_dname; |
| struct inode *new_ip; |
| struct component_name old_dname; |
| struct inode *old_ip; |
| int rc; |
| tid_t tid; |
| struct tlock *tlck; |
| struct dt_lock *dtlck; |
| struct lv *lv; |
| int ipcount; |
| struct inode *iplist[4]; |
| struct tblock *tblk; |
| s64 new_size = 0; |
| int commit_flag; |
| |
| if (flags & ~RENAME_NOREPLACE) |
| return -EINVAL; |
| |
| jfs_info("jfs_rename: %pd %pd", old_dentry, new_dentry); |
| |
| rc = dquot_initialize(old_dir); |
| if (rc) |
| goto out1; |
| rc = dquot_initialize(new_dir); |
| if (rc) |
| goto out1; |
| |
| old_ip = d_inode(old_dentry); |
| new_ip = d_inode(new_dentry); |
| |
| if ((rc = get_UCSname(&old_dname, old_dentry))) |
| goto out1; |
| |
| if ((rc = get_UCSname(&new_dname, new_dentry))) |
| goto out2; |
| |
| /* |
| * Make sure source inode number is what we think it is |
| */ |
| rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP); |
| if (rc || (ino != old_ip->i_ino)) { |
| rc = -ENOENT; |
| goto out3; |
| } |
| |
| /* |
| * Make sure dest inode number (if any) is what we think it is |
| */ |
| rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP); |
| if (!rc) { |
| if ((!new_ip) || (ino != new_ip->i_ino)) { |
| rc = -ESTALE; |
| goto out3; |
| } |
| } else if (rc != -ENOENT) |
| goto out3; |
| else if (new_ip) { |
| /* no entry exists, but one was expected */ |
| rc = -ESTALE; |
| goto out3; |
| } |
| |
| if (S_ISDIR(old_ip->i_mode)) { |
| if (new_ip) { |
| if (!dtEmpty(new_ip)) { |
| rc = -ENOTEMPTY; |
| goto out3; |
| } |
| } |
| } else if (new_ip) { |
| IWRITE_LOCK(new_ip, RDWRLOCK_NORMAL); |
| /* Init inode for quota operations. */ |
| rc = dquot_initialize(new_ip); |
| if (rc) |
| goto out_unlock; |
| } |
| |
| /* |
| * The real work starts here |
| */ |
| tid = txBegin(new_dir->i_sb, 0); |
| |
| /* |
| * How do we know the locking is safe from deadlocks? |
| * The vfs does the hard part for us. Any time we are taking nested |
| * commit_mutexes, the vfs already has i_mutex held on the parent. |
| * Here, the vfs has already taken i_mutex on both old_dir and new_dir. |
| */ |
| mutex_lock_nested(&JFS_IP(new_dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(old_ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| if (old_dir != new_dir) |
| mutex_lock_nested(&JFS_IP(old_dir)->commit_mutex, |
| COMMIT_MUTEX_SECOND_PARENT); |
| |
| if (new_ip) { |
| mutex_lock_nested(&JFS_IP(new_ip)->commit_mutex, |
| COMMIT_MUTEX_VICTIM); |
| /* |
| * Change existing directory entry to new inode number |
| */ |
| ino = new_ip->i_ino; |
| rc = dtModify(tid, new_dir, &new_dname, &ino, |
| old_ip->i_ino, JFS_RENAME); |
| if (rc) |
| goto out_tx; |
| drop_nlink(new_ip); |
| if (S_ISDIR(new_ip->i_mode)) { |
| drop_nlink(new_ip); |
| if (new_ip->i_nlink) { |
| mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
| if (old_dir != new_dir) |
| mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
| mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(new_dir)->commit_mutex); |
| if (!S_ISDIR(old_ip->i_mode) && new_ip) |
| IWRITE_UNLOCK(new_ip); |
| jfs_error(new_ip->i_sb, |
| "new_ip->i_nlink != 0\n"); |
| return -EIO; |
| } |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_DELETE; |
| tblk->u.ip = new_ip; |
| } else if (new_ip->i_nlink == 0) { |
| assert(!test_cflag(COMMIT_Nolink, new_ip)); |
| /* free block resources */ |
| if ((new_size = commitZeroLink(tid, new_ip)) < 0) { |
| txAbort(tid, 1); /* Marks FS Dirty */ |
| rc = new_size; |
| goto out_tx; |
| } |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_DELETE; |
| tblk->u.ip = new_ip; |
| } else { |
| inode_set_ctime_current(new_ip); |
| mark_inode_dirty(new_ip); |
| } |
| } else { |
| /* |
| * Add new directory entry |
| */ |
| rc = dtSearch(new_dir, &new_dname, &ino, &btstack, |
| JFS_CREATE); |
| if (rc) { |
| jfs_err("jfs_rename didn't expect dtSearch to fail w/rc = %d", |
| rc); |
| goto out_tx; |
| } |
| |
| ino = old_ip->i_ino; |
| rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack); |
| if (rc) { |
| if (rc == -EIO) |
| jfs_err("jfs_rename: dtInsert returned -EIO"); |
| goto out_tx; |
| } |
| if (S_ISDIR(old_ip->i_mode)) |
| inc_nlink(new_dir); |
| } |
| /* |
| * Remove old directory entry |
| */ |
| |
| ino = old_ip->i_ino; |
| rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE); |
| if (rc) { |
| jfs_err("jfs_rename did not expect dtDelete to return rc = %d", |
| rc); |
| txAbort(tid, 1); /* Marks Filesystem dirty */ |
| goto out_tx; |
| } |
| if (S_ISDIR(old_ip->i_mode)) { |
| drop_nlink(old_dir); |
| if (old_dir != new_dir) { |
| /* |
| * Change inode number of parent for moved directory |
| */ |
| |
| JFS_IP(old_ip)->i_dtroot.header.idotdot = |
| cpu_to_le32(new_dir->i_ino); |
| |
| /* Linelock header of dtree */ |
| tlck = txLock(tid, old_ip, |
| (struct metapage *) &JFS_IP(old_ip)->bxflag, |
| tlckDTREE | tlckBTROOT | tlckRELINK); |
| dtlck = (struct dt_lock *) & tlck->lock; |
| ASSERT(dtlck->index == 0); |
| lv = & dtlck->lv[0]; |
| lv->offset = 0; |
| lv->length = 1; |
| dtlck->index++; |
| } |
| } |
| |
| /* |
| * Update ctime on changed/moved inodes & mark dirty |
| */ |
| inode_set_ctime_current(old_ip); |
| mark_inode_dirty(old_ip); |
| |
| new_dir->i_mtime = inode_set_ctime_current(new_dir); |
| mark_inode_dirty(new_dir); |
| |
| /* Build list of inodes modified by this transaction */ |
| ipcount = 0; |
| iplist[ipcount++] = old_ip; |
| if (new_ip) |
| iplist[ipcount++] = new_ip; |
| iplist[ipcount++] = old_dir; |
| |
| if (old_dir != new_dir) { |
| iplist[ipcount++] = new_dir; |
| old_dir->i_mtime = inode_set_ctime_current(old_dir); |
| mark_inode_dirty(old_dir); |
| } |
| |
| /* |
| * Incomplete truncate of file data can |
| * result in timing problems unless we synchronously commit the |
| * transaction. |
| */ |
| if (new_size) |
| commit_flag = COMMIT_SYNC; |
| else |
| commit_flag = 0; |
| |
| rc = txCommit(tid, ipcount, iplist, commit_flag); |
| |
| out_tx: |
| txEnd(tid); |
| if (new_ip) |
| mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
| if (old_dir != new_dir) |
| mutex_unlock(&JFS_IP(old_dir)->commit_mutex); |
| mutex_unlock(&JFS_IP(old_ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(new_dir)->commit_mutex); |
| |
| while (new_size && (rc == 0)) { |
| tid = txBegin(new_ip->i_sb, 0); |
| mutex_lock(&JFS_IP(new_ip)->commit_mutex); |
| new_size = xtTruncate_pmap(tid, new_ip, new_size); |
| if (new_size < 0) { |
| txAbort(tid, 1); |
| rc = new_size; |
| } else |
| rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC); |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(new_ip)->commit_mutex); |
| } |
| if (new_ip && (new_ip->i_nlink == 0)) |
| set_cflag(COMMIT_Nolink, new_ip); |
| /* |
| * Truncating the directory index table is not guaranteed. It |
| * may need to be done iteratively |
| */ |
| if (test_cflag(COMMIT_Stale, old_dir)) { |
| if (old_dir->i_size > 1) |
| jfs_truncate_nolock(old_dir, 0); |
| |
| clear_cflag(COMMIT_Stale, old_dir); |
| } |
| out_unlock: |
| if (new_ip && !S_ISDIR(new_ip->i_mode)) |
| IWRITE_UNLOCK(new_ip); |
| out3: |
| free_UCSname(&new_dname); |
| out2: |
| free_UCSname(&old_dname); |
| out1: |
| jfs_info("jfs_rename: returning %d", rc); |
| return rc; |
| } |
| |
| |
| /* |
| * NAME: jfs_mknod |
| * |
| * FUNCTION: Create a special file (device) |
| */ |
| static int jfs_mknod(struct mnt_idmap *idmap, struct inode *dir, |
| struct dentry *dentry, umode_t mode, dev_t rdev) |
| { |
| struct jfs_inode_info *jfs_ip; |
| struct btstack btstack; |
| struct component_name dname; |
| ino_t ino; |
| struct inode *ip; |
| struct inode *iplist[2]; |
| int rc; |
| tid_t tid; |
| struct tblock *tblk; |
| |
| jfs_info("jfs_mknod: %pd", dentry); |
| |
| rc = dquot_initialize(dir); |
| if (rc) |
| goto out; |
| |
| if ((rc = get_UCSname(&dname, dentry))) |
| goto out; |
| |
| ip = ialloc(dir, mode); |
| if (IS_ERR(ip)) { |
| rc = PTR_ERR(ip); |
| goto out1; |
| } |
| jfs_ip = JFS_IP(ip); |
| |
| tid = txBegin(dir->i_sb, 0); |
| |
| mutex_lock_nested(&JFS_IP(dir)->commit_mutex, COMMIT_MUTEX_PARENT); |
| mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); |
| |
| rc = jfs_init_acl(tid, ip, dir); |
| if (rc) |
| goto out3; |
| |
| rc = jfs_init_security(tid, ip, dir, &dentry->d_name); |
| if (rc) { |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) { |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| tblk = tid_to_tblock(tid); |
| tblk->xflag |= COMMIT_CREATE; |
| tblk->ino = ip->i_ino; |
| tblk->u.ixpxd = JFS_IP(ip)->ixpxd; |
| |
| ino = ip->i_ino; |
| if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) { |
| txAbort(tid, 0); |
| goto out3; |
| } |
| |
| ip->i_op = &jfs_file_inode_operations; |
| jfs_ip->dev = new_encode_dev(rdev); |
| init_special_inode(ip, ip->i_mode, rdev); |
| |
| mark_inode_dirty(ip); |
| |
| dir->i_mtime = inode_set_ctime_current(dir); |
| |
| mark_inode_dirty(dir); |
| |
| iplist[0] = dir; |
| iplist[1] = ip; |
| rc = txCommit(tid, 2, iplist, 0); |
| |
| out3: |
| txEnd(tid); |
| mutex_unlock(&JFS_IP(ip)->commit_mutex); |
| mutex_unlock(&JFS_IP(dir)->commit_mutex); |
| if (rc) { |
| free_ea_wmap(ip); |
| clear_nlink(ip); |
| discard_new_inode(ip); |
| } else { |
| d_instantiate_new(dentry, ip); |
| } |
| |
| out1: |
| free_UCSname(&dname); |
| |
| out: |
| jfs_info("jfs_mknod: returning %d", rc); |
| return rc; |
| } |
| |
| static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, unsigned int flags) |
| { |
| struct btstack btstack; |
| ino_t inum; |
| struct inode *ip; |
| struct component_name key; |
| int rc; |
| |
| jfs_info("jfs_lookup: name = %pd", dentry); |
| |
| if ((rc = get_UCSname(&key, dentry))) |
| return ERR_PTR(rc); |
| rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP); |
| free_UCSname(&key); |
| if (rc == -ENOENT) { |
| ip = NULL; |
| } else if (rc) { |
| jfs_err("jfs_lookup: dtSearch returned %d", rc); |
| ip = ERR_PTR(rc); |
| } else { |
| ip = jfs_iget(dip->i_sb, inum); |
| if (IS_ERR(ip)) |
| jfs_err("jfs_lookup: iget failed on inum %d", (uint)inum); |
| } |
| |
| return d_splice_alias(ip, dentry); |
| } |
| |
| static struct inode *jfs_nfs_get_inode(struct super_block *sb, |
| u64 ino, u32 generation) |
| { |
| struct inode *inode; |
| |
| if (ino == 0) |
| return ERR_PTR(-ESTALE); |
| inode = jfs_iget(sb, ino); |
| if (IS_ERR(inode)) |
| return ERR_CAST(inode); |
| |
| if (generation && inode->i_generation != generation) { |
| iput(inode); |
| return ERR_PTR(-ESTALE); |
| } |
| |
| return inode; |
| } |
| |
| struct dentry *jfs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
| int fh_len, int fh_type) |
| { |
| return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| jfs_nfs_get_inode); |
| } |
| |
| struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid, |
| int fh_len, int fh_type) |
| { |
| return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| jfs_nfs_get_inode); |
| } |
| |
| struct dentry *jfs_get_parent(struct dentry *dentry) |
| { |
| unsigned long parent_ino; |
| |
| parent_ino = |
| le32_to_cpu(JFS_IP(d_inode(dentry))->i_dtroot.header.idotdot); |
| |
| return d_obtain_alias(jfs_iget(dentry->d_sb, parent_ino)); |
| } |
| |
| const struct inode_operations jfs_dir_inode_operations = { |
| .create = jfs_create, |
| .lookup = jfs_lookup, |
| .link = jfs_link, |
| .unlink = jfs_unlink, |
| .symlink = jfs_symlink, |
| .mkdir = jfs_mkdir, |
| .rmdir = jfs_rmdir, |
| .mknod = jfs_mknod, |
| .rename = jfs_rename, |
| .listxattr = jfs_listxattr, |
| .setattr = jfs_setattr, |
| .fileattr_get = jfs_fileattr_get, |
| .fileattr_set = jfs_fileattr_set, |
| #ifdef CONFIG_JFS_POSIX_ACL |
| .get_inode_acl = jfs_get_acl, |
| .set_acl = jfs_set_acl, |
| #endif |
| }; |
| |
| WRAP_DIR_ITER(jfs_readdir) // FIXME! |
| const struct file_operations jfs_dir_operations = { |
| .read = generic_read_dir, |
| .iterate_shared = shared_jfs_readdir, |
| .fsync = jfs_fsync, |
| .unlocked_ioctl = jfs_ioctl, |
| .compat_ioctl = compat_ptr_ioctl, |
| .llseek = generic_file_llseek, |
| }; |
| |
| static int jfs_ci_hash(const struct dentry *dir, struct qstr *this) |
| { |
| unsigned long hash; |
| int i; |
| |
| hash = init_name_hash(dir); |
| for (i=0; i < this->len; i++) |
| hash = partial_name_hash(tolower(this->name[i]), hash); |
| this->hash = end_name_hash(hash); |
| |
| return 0; |
| } |
| |
| static int jfs_ci_compare(const struct dentry *dentry, |
| unsigned int len, const char *str, const struct qstr *name) |
| { |
| int i, result = 1; |
| |
| if (len != name->len) |
| goto out; |
| for (i=0; i < len; i++) { |
| if (tolower(str[i]) != tolower(name->name[i])) |
| goto out; |
| } |
| result = 0; |
| out: |
| return result; |
| } |
| |
| static int jfs_ci_revalidate(struct dentry *dentry, unsigned int flags) |
| { |
| /* |
| * This is not negative dentry. Always valid. |
| * |
| * Note, rename() to existing directory entry will have ->d_inode, |
| * and will use existing name which isn't specified name by user. |
| * |
| * We may be able to drop this positive dentry here. But dropping |
| * positive dentry isn't good idea. So it's unsupported like |
| * rename("filename", "FILENAME") for now. |
| */ |
| if (d_really_is_positive(dentry)) |
| return 1; |
| |
| /* |
| * This may be nfsd (or something), anyway, we can't see the |
| * intent of this. So, since this can be for creation, drop it. |
| */ |
| if (!flags) |
| return 0; |
| |
| /* |
| * Drop the negative dentry, in order to make sure to use the |
| * case sensitive name which is specified by user if this is |
| * for creation. |
| */ |
| if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) |
| return 0; |
| return 1; |
| } |
| |
| const struct dentry_operations jfs_ci_dentry_operations = |
| { |
| .d_hash = jfs_ci_hash, |
| .d_compare = jfs_ci_compare, |
| .d_revalidate = jfs_ci_revalidate, |
| }; |