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![Christoph Hellwig](/assets/img/avatar_default.png)
->rename already gets the target inode passed if it exits. Pass it down to xfs_rename so that we can avoid looking it up again. Also simplify locking as the first lock section in xfs_rename can go away now: the isdir is an invariant over the lifetime of the inode, and new_parent and the nlink check are namespace topology protected by i_mutex in the VFS. The projid check needs to move into the second lock section anyway to not be racy. Also kill the now unused xfs_dir_lookup_int and remove the now-unused first_locked argumet to xfs_lock_inodes. SGI-PV: 976035 SGI-Modid: xfs-linux-melb:xfs-kern:30903a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
918 lines
20 KiB
C
918 lines
20 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would 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 the
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* 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 the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_alloc.h"
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#include "xfs_dmapi.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_bmap.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_itable.h"
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#include "xfs_rw.h"
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#include "xfs_acl.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_utils.h"
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#include "xfs_vnodeops.h"
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#include <linux/capability.h>
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#include <linux/xattr.h>
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#include <linux/namei.h>
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#include <linux/security.h>
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#include <linux/falloc.h>
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/*
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* Bring the atime in the XFS inode uptodate.
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* Used before logging the inode to disk or when the Linux inode goes away.
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*/
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void
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xfs_synchronize_atime(
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xfs_inode_t *ip)
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{
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struct inode *inode = ip->i_vnode;
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if (inode) {
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ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
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ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
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}
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}
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/*
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* If the linux inode exists, mark it dirty.
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* Used when commiting a dirty inode into a transaction so that
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* the inode will get written back by the linux code
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*/
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void
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xfs_mark_inode_dirty_sync(
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xfs_inode_t *ip)
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{
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struct inode *inode = ip->i_vnode;
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if (inode)
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mark_inode_dirty_sync(inode);
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}
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/*
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* Change the requested timestamp in the given inode.
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* We don't lock across timestamp updates, and we don't log them but
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* we do record the fact that there is dirty information in core.
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*
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* NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
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* with XFS_ICHGTIME_ACC to be sure that access time
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* update will take. Calling first with XFS_ICHGTIME_ACC
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* and then XFS_ICHGTIME_MOD may fail to modify the access
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* timestamp if the filesystem is mounted noacctm.
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*/
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void
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xfs_ichgtime(
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xfs_inode_t *ip,
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int flags)
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{
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struct inode *inode = vn_to_inode(XFS_ITOV(ip));
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timespec_t tv;
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nanotime(&tv);
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if (flags & XFS_ICHGTIME_MOD) {
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inode->i_mtime = tv;
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ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
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ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
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}
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if (flags & XFS_ICHGTIME_ACC) {
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inode->i_atime = tv;
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ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
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ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
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}
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if (flags & XFS_ICHGTIME_CHG) {
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inode->i_ctime = tv;
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ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
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ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
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}
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/*
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* We update the i_update_core field _after_ changing
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* the timestamps in order to coordinate properly with
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* xfs_iflush() so that we don't lose timestamp updates.
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* This keeps us from having to hold the inode lock
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* while doing this. We use the SYNCHRONIZE macro to
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* ensure that the compiler does not reorder the update
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* of i_update_core above the timestamp updates above.
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*/
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SYNCHRONIZE();
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ip->i_update_core = 1;
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if (!(inode->i_state & I_NEW))
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mark_inode_dirty_sync(inode);
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}
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/*
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* Variant on the above which avoids querying the system clock
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* in situations where we know the Linux inode timestamps have
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* just been updated (and so we can update our inode cheaply).
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*/
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void
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xfs_ichgtime_fast(
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xfs_inode_t *ip,
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struct inode *inode,
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int flags)
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{
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timespec_t *tvp;
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/*
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* Atime updates for read() & friends are handled lazily now, and
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* explicit updates must go through xfs_ichgtime()
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*/
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ASSERT((flags & XFS_ICHGTIME_ACC) == 0);
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if (flags & XFS_ICHGTIME_MOD) {
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tvp = &inode->i_mtime;
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ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
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ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
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}
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if (flags & XFS_ICHGTIME_CHG) {
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tvp = &inode->i_ctime;
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ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
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ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
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}
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/*
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* We update the i_update_core field _after_ changing
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* the timestamps in order to coordinate properly with
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* xfs_iflush() so that we don't lose timestamp updates.
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* This keeps us from having to hold the inode lock
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* while doing this. We use the SYNCHRONIZE macro to
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* ensure that the compiler does not reorder the update
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* of i_update_core above the timestamp updates above.
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*/
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SYNCHRONIZE();
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ip->i_update_core = 1;
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if (!(inode->i_state & I_NEW))
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mark_inode_dirty_sync(inode);
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}
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/*
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* Pull the link count and size up from the xfs inode to the linux inode
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*/
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STATIC void
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xfs_validate_fields(
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struct inode *inode)
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{
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struct xfs_inode *ip = XFS_I(inode);
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loff_t size;
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/* we're under i_sem so i_size can't change under us */
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size = XFS_ISIZE(ip);
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if (i_size_read(inode) != size)
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i_size_write(inode, size);
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}
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/*
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* Hook in SELinux. This is not quite correct yet, what we really need
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* here (as we do for default ACLs) is a mechanism by which creation of
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* these attrs can be journalled at inode creation time (along with the
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* inode, of course, such that log replay can't cause these to be lost).
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*/
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STATIC int
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xfs_init_security(
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struct inode *inode,
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struct inode *dir)
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{
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struct xfs_inode *ip = XFS_I(inode);
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size_t length;
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void *value;
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char *name;
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int error;
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error = security_inode_init_security(inode, dir, &name,
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&value, &length);
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if (error) {
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if (error == -EOPNOTSUPP)
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return 0;
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return -error;
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}
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error = xfs_attr_set(ip, name, value, length, ATTR_SECURE);
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if (!error)
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xfs_iflags_set(ip, XFS_IMODIFIED);
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kfree(name);
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kfree(value);
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return error;
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}
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static void
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xfs_dentry_to_name(
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struct xfs_name *namep,
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struct dentry *dentry)
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{
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namep->name = dentry->d_name.name;
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namep->len = dentry->d_name.len;
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}
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STATIC void
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xfs_cleanup_inode(
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struct inode *dir,
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struct inode *inode,
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struct dentry *dentry,
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int mode)
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{
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struct xfs_name teardown;
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/* Oh, the horror.
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* If we can't add the ACL or we fail in
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* xfs_init_security we must back out.
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* ENOSPC can hit here, among other things.
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*/
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xfs_dentry_to_name(&teardown, dentry);
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if (S_ISDIR(mode))
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xfs_rmdir(XFS_I(dir), &teardown, XFS_I(inode));
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else
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xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
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iput(inode);
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}
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STATIC int
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xfs_vn_mknod(
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struct inode *dir,
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struct dentry *dentry,
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int mode,
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dev_t rdev)
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{
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struct inode *inode;
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struct xfs_inode *ip = NULL;
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xfs_acl_t *default_acl = NULL;
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struct xfs_name name;
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attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
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int error;
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/*
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* Irix uses Missed'em'V split, but doesn't want to see
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* the upper 5 bits of (14bit) major.
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*/
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if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
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return -EINVAL;
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if (test_default_acl && test_default_acl(dir)) {
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if (!_ACL_ALLOC(default_acl)) {
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return -ENOMEM;
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}
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if (!_ACL_GET_DEFAULT(dir, default_acl)) {
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_ACL_FREE(default_acl);
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default_acl = NULL;
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}
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}
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xfs_dentry_to_name(&name, dentry);
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if (IS_POSIXACL(dir) && !default_acl)
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mode &= ~current->fs->umask;
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switch (mode & S_IFMT) {
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case S_IFCHR:
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case S_IFBLK:
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case S_IFIFO:
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case S_IFSOCK:
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rdev = sysv_encode_dev(rdev);
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case S_IFREG:
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error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL);
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break;
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case S_IFDIR:
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error = xfs_mkdir(XFS_I(dir), &name, mode, &ip, NULL);
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break;
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default:
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error = EINVAL;
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break;
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}
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if (unlikely(error))
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goto out_free_acl;
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inode = ip->i_vnode;
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error = xfs_init_security(inode, dir);
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if (unlikely(error))
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goto out_cleanup_inode;
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if (default_acl) {
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error = _ACL_INHERIT(inode, mode, default_acl);
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if (unlikely(error))
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goto out_cleanup_inode;
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xfs_iflags_set(ip, XFS_IMODIFIED);
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_ACL_FREE(default_acl);
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}
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|
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if (S_ISDIR(mode))
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xfs_validate_fields(inode);
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d_instantiate(dentry, inode);
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xfs_validate_fields(dir);
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return -error;
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out_cleanup_inode:
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xfs_cleanup_inode(dir, inode, dentry, mode);
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out_free_acl:
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if (default_acl)
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_ACL_FREE(default_acl);
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return -error;
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}
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STATIC int
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xfs_vn_create(
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struct inode *dir,
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struct dentry *dentry,
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int mode,
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struct nameidata *nd)
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{
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return xfs_vn_mknod(dir, dentry, mode, 0);
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}
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STATIC int
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xfs_vn_mkdir(
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struct inode *dir,
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struct dentry *dentry,
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int mode)
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{
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return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
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}
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|
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STATIC struct dentry *
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xfs_vn_lookup(
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struct inode *dir,
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struct dentry *dentry,
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struct nameidata *nd)
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{
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struct xfs_inode *cip;
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struct xfs_name name;
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int error;
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|
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if (dentry->d_name.len >= MAXNAMELEN)
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return ERR_PTR(-ENAMETOOLONG);
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|
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xfs_dentry_to_name(&name, dentry);
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error = xfs_lookup(XFS_I(dir), &name, &cip);
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if (unlikely(error)) {
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if (unlikely(error != ENOENT))
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return ERR_PTR(-error);
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d_add(dentry, NULL);
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return NULL;
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}
|
|
|
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return d_splice_alias(cip->i_vnode, dentry);
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}
|
|
|
|
STATIC int
|
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xfs_vn_link(
|
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struct dentry *old_dentry,
|
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struct inode *dir,
|
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struct dentry *dentry)
|
|
{
|
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struct inode *inode; /* inode of guy being linked to */
|
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struct xfs_name name;
|
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int error;
|
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|
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inode = old_dentry->d_inode;
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xfs_dentry_to_name(&name, dentry);
|
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|
|
igrab(inode);
|
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error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
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if (unlikely(error)) {
|
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iput(inode);
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return -error;
|
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}
|
|
|
|
xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
|
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xfs_validate_fields(inode);
|
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d_instantiate(dentry, inode);
|
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return 0;
|
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}
|
|
|
|
STATIC int
|
|
xfs_vn_unlink(
|
|
struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct inode *inode;
|
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struct xfs_name name;
|
|
int error;
|
|
|
|
inode = dentry->d_inode;
|
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xfs_dentry_to_name(&name, dentry);
|
|
|
|
error = xfs_remove(XFS_I(dir), &name, XFS_I(inode));
|
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if (likely(!error)) {
|
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xfs_validate_fields(dir); /* size needs update */
|
|
xfs_validate_fields(inode);
|
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}
|
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return -error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_symlink(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
const char *symname)
|
|
{
|
|
struct inode *inode;
|
|
struct xfs_inode *cip = NULL;
|
|
struct xfs_name name;
|
|
int error;
|
|
mode_t mode;
|
|
|
|
mode = S_IFLNK |
|
|
(irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
|
|
xfs_dentry_to_name(&name, dentry);
|
|
|
|
error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL);
|
|
if (unlikely(error))
|
|
goto out;
|
|
|
|
inode = cip->i_vnode;
|
|
|
|
error = xfs_init_security(inode, dir);
|
|
if (unlikely(error))
|
|
goto out_cleanup_inode;
|
|
|
|
d_instantiate(dentry, inode);
|
|
xfs_validate_fields(dir);
|
|
xfs_validate_fields(inode);
|
|
return 0;
|
|
|
|
out_cleanup_inode:
|
|
xfs_cleanup_inode(dir, inode, dentry, 0);
|
|
out:
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_rmdir(
|
|
struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct xfs_name name;
|
|
int error;
|
|
|
|
xfs_dentry_to_name(&name, dentry);
|
|
|
|
error = xfs_rmdir(XFS_I(dir), &name, XFS_I(inode));
|
|
if (likely(!error)) {
|
|
xfs_validate_fields(inode);
|
|
xfs_validate_fields(dir);
|
|
}
|
|
return -error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_rename(
|
|
struct inode *odir,
|
|
struct dentry *odentry,
|
|
struct inode *ndir,
|
|
struct dentry *ndentry)
|
|
{
|
|
struct inode *new_inode = ndentry->d_inode;
|
|
struct xfs_name oname;
|
|
struct xfs_name nname;
|
|
int error;
|
|
|
|
xfs_dentry_to_name(&oname, odentry);
|
|
xfs_dentry_to_name(&nname, ndentry);
|
|
|
|
error = xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
|
|
XFS_I(ndir), &nname, new_inode ?
|
|
XFS_I(new_inode) : NULL);
|
|
if (likely(!error)) {
|
|
if (new_inode)
|
|
xfs_validate_fields(new_inode);
|
|
xfs_validate_fields(odir);
|
|
if (ndir != odir)
|
|
xfs_validate_fields(ndir);
|
|
}
|
|
return -error;
|
|
}
|
|
|
|
/*
|
|
* careful here - this function can get called recursively, so
|
|
* we need to be very careful about how much stack we use.
|
|
* uio is kmalloced for this reason...
|
|
*/
|
|
STATIC void *
|
|
xfs_vn_follow_link(
|
|
struct dentry *dentry,
|
|
struct nameidata *nd)
|
|
{
|
|
char *link;
|
|
int error = -ENOMEM;
|
|
|
|
link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
|
|
if (!link)
|
|
goto out_err;
|
|
|
|
error = -xfs_readlink(XFS_I(dentry->d_inode), link);
|
|
if (unlikely(error))
|
|
goto out_kfree;
|
|
|
|
nd_set_link(nd, link);
|
|
return NULL;
|
|
|
|
out_kfree:
|
|
kfree(link);
|
|
out_err:
|
|
nd_set_link(nd, ERR_PTR(error));
|
|
return NULL;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_vn_put_link(
|
|
struct dentry *dentry,
|
|
struct nameidata *nd,
|
|
void *p)
|
|
{
|
|
char *s = nd_get_link(nd);
|
|
|
|
if (!IS_ERR(s))
|
|
kfree(s);
|
|
}
|
|
|
|
#ifdef CONFIG_XFS_POSIX_ACL
|
|
STATIC int
|
|
xfs_check_acl(
|
|
struct inode *inode,
|
|
int mask)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
int error;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
if (XFS_IFORK_Q(ip)) {
|
|
error = xfs_acl_iaccess(ip, mask, NULL);
|
|
if (error != -1)
|
|
return -error;
|
|
}
|
|
|
|
return -EAGAIN;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_permission(
|
|
struct inode *inode,
|
|
int mask,
|
|
struct nameidata *nd)
|
|
{
|
|
return generic_permission(inode, mask, xfs_check_acl);
|
|
}
|
|
#else
|
|
#define xfs_vn_permission NULL
|
|
#endif
|
|
|
|
STATIC int
|
|
xfs_vn_getattr(
|
|
struct vfsmount *mnt,
|
|
struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
xfs_itrace_entry(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
stat->size = XFS_ISIZE(ip);
|
|
stat->dev = inode->i_sb->s_dev;
|
|
stat->mode = ip->i_d.di_mode;
|
|
stat->nlink = ip->i_d.di_nlink;
|
|
stat->uid = ip->i_d.di_uid;
|
|
stat->gid = ip->i_d.di_gid;
|
|
stat->ino = ip->i_ino;
|
|
#if XFS_BIG_INUMS
|
|
stat->ino += mp->m_inoadd;
|
|
#endif
|
|
stat->atime = inode->i_atime;
|
|
stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec;
|
|
stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
|
|
stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec;
|
|
stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
|
|
stat->blocks =
|
|
XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
|
|
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
stat->blksize = BLKDEV_IOSIZE;
|
|
stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
|
|
sysv_minor(ip->i_df.if_u2.if_rdev));
|
|
break;
|
|
default:
|
|
if (XFS_IS_REALTIME_INODE(ip)) {
|
|
/*
|
|
* If the file blocks are being allocated from a
|
|
* realtime volume, then return the inode's realtime
|
|
* extent size or the realtime volume's extent size.
|
|
*/
|
|
stat->blksize =
|
|
xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
|
|
} else
|
|
stat->blksize = xfs_preferred_iosize(mp);
|
|
stat->rdev = 0;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_setattr(
|
|
struct dentry *dentry,
|
|
struct iattr *attr)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
unsigned int ia_valid = attr->ia_valid;
|
|
bhv_vattr_t vattr = { 0 };
|
|
int flags = 0;
|
|
int error;
|
|
|
|
if (ia_valid & ATTR_UID) {
|
|
vattr.va_mask |= XFS_AT_UID;
|
|
vattr.va_uid = attr->ia_uid;
|
|
}
|
|
if (ia_valid & ATTR_GID) {
|
|
vattr.va_mask |= XFS_AT_GID;
|
|
vattr.va_gid = attr->ia_gid;
|
|
}
|
|
if (ia_valid & ATTR_SIZE) {
|
|
vattr.va_mask |= XFS_AT_SIZE;
|
|
vattr.va_size = attr->ia_size;
|
|
}
|
|
if (ia_valid & ATTR_ATIME) {
|
|
vattr.va_mask |= XFS_AT_ATIME;
|
|
vattr.va_atime = attr->ia_atime;
|
|
inode->i_atime = attr->ia_atime;
|
|
}
|
|
if (ia_valid & ATTR_MTIME) {
|
|
vattr.va_mask |= XFS_AT_MTIME;
|
|
vattr.va_mtime = attr->ia_mtime;
|
|
}
|
|
if (ia_valid & ATTR_CTIME) {
|
|
vattr.va_mask |= XFS_AT_CTIME;
|
|
vattr.va_ctime = attr->ia_ctime;
|
|
}
|
|
if (ia_valid & ATTR_MODE) {
|
|
vattr.va_mask |= XFS_AT_MODE;
|
|
vattr.va_mode = attr->ia_mode;
|
|
if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
|
|
inode->i_mode &= ~S_ISGID;
|
|
}
|
|
|
|
if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
|
|
flags |= ATTR_UTIME;
|
|
#ifdef ATTR_NO_BLOCK
|
|
if ((ia_valid & ATTR_NO_BLOCK))
|
|
flags |= ATTR_NONBLOCK;
|
|
#endif
|
|
|
|
error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL);
|
|
if (likely(!error))
|
|
vn_revalidate(vn_from_inode(inode));
|
|
return -error;
|
|
}
|
|
|
|
/*
|
|
* block_truncate_page can return an error, but we can't propagate it
|
|
* at all here. Leave a complaint + stack trace in the syslog because
|
|
* this could be bad. If it is bad, we need to propagate the error further.
|
|
*/
|
|
STATIC void
|
|
xfs_vn_truncate(
|
|
struct inode *inode)
|
|
{
|
|
int error;
|
|
error = block_truncate_page(inode->i_mapping, inode->i_size,
|
|
xfs_get_blocks);
|
|
WARN_ON(error);
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_setxattr(
|
|
struct dentry *dentry,
|
|
const char *name,
|
|
const void *data,
|
|
size_t size,
|
|
int flags)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
|
|
char *attr = (char *)name;
|
|
attrnames_t *namesp;
|
|
int xflags = 0;
|
|
int error;
|
|
|
|
namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
|
|
if (!namesp)
|
|
return -EOPNOTSUPP;
|
|
attr += namesp->attr_namelen;
|
|
error = namesp->attr_capable(vp, NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Convert Linux syscall to XFS internal ATTR flags */
|
|
if (flags & XATTR_CREATE)
|
|
xflags |= ATTR_CREATE;
|
|
if (flags & XATTR_REPLACE)
|
|
xflags |= ATTR_REPLACE;
|
|
xflags |= namesp->attr_flag;
|
|
return namesp->attr_set(vp, attr, (void *)data, size, xflags);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_vn_getxattr(
|
|
struct dentry *dentry,
|
|
const char *name,
|
|
void *data,
|
|
size_t size)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
|
|
char *attr = (char *)name;
|
|
attrnames_t *namesp;
|
|
int xflags = 0;
|
|
ssize_t error;
|
|
|
|
namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
|
|
if (!namesp)
|
|
return -EOPNOTSUPP;
|
|
attr += namesp->attr_namelen;
|
|
error = namesp->attr_capable(vp, NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Convert Linux syscall to XFS internal ATTR flags */
|
|
if (!size) {
|
|
xflags |= ATTR_KERNOVAL;
|
|
data = NULL;
|
|
}
|
|
xflags |= namesp->attr_flag;
|
|
return namesp->attr_get(vp, attr, (void *)data, size, xflags);
|
|
}
|
|
|
|
STATIC ssize_t
|
|
xfs_vn_listxattr(
|
|
struct dentry *dentry,
|
|
char *data,
|
|
size_t size)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
|
|
int error, xflags = ATTR_KERNAMELS;
|
|
ssize_t result;
|
|
|
|
if (!size)
|
|
xflags |= ATTR_KERNOVAL;
|
|
xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;
|
|
|
|
error = attr_generic_list(vp, data, size, xflags, &result);
|
|
if (error < 0)
|
|
return error;
|
|
return result;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_removexattr(
|
|
struct dentry *dentry,
|
|
const char *name)
|
|
{
|
|
bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
|
|
char *attr = (char *)name;
|
|
attrnames_t *namesp;
|
|
int xflags = 0;
|
|
int error;
|
|
|
|
namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
|
|
if (!namesp)
|
|
return -EOPNOTSUPP;
|
|
attr += namesp->attr_namelen;
|
|
error = namesp->attr_capable(vp, NULL);
|
|
if (error)
|
|
return error;
|
|
xflags |= namesp->attr_flag;
|
|
return namesp->attr_remove(vp, attr, xflags);
|
|
}
|
|
|
|
STATIC long
|
|
xfs_vn_fallocate(
|
|
struct inode *inode,
|
|
int mode,
|
|
loff_t offset,
|
|
loff_t len)
|
|
{
|
|
long error;
|
|
loff_t new_size = 0;
|
|
xfs_flock64_t bf;
|
|
xfs_inode_t *ip = XFS_I(inode);
|
|
|
|
/* preallocation on directories not yet supported */
|
|
error = -ENODEV;
|
|
if (S_ISDIR(inode->i_mode))
|
|
goto out_error;
|
|
|
|
bf.l_whence = 0;
|
|
bf.l_start = offset;
|
|
bf.l_len = len;
|
|
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL);
|
|
error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf,
|
|
0, NULL, ATTR_NOLOCK);
|
|
if (!error && !(mode & FALLOC_FL_KEEP_SIZE) &&
|
|
offset + len > i_size_read(inode))
|
|
new_size = offset + len;
|
|
|
|
/* Change file size if needed */
|
|
if (new_size) {
|
|
bhv_vattr_t va;
|
|
|
|
va.va_mask = XFS_AT_SIZE;
|
|
va.va_size = new_size;
|
|
error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL);
|
|
}
|
|
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
out_error:
|
|
return error;
|
|
}
|
|
|
|
const struct inode_operations xfs_inode_operations = {
|
|
.permission = xfs_vn_permission,
|
|
.truncate = xfs_vn_truncate,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = xfs_vn_setxattr,
|
|
.getxattr = xfs_vn_getxattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.removexattr = xfs_vn_removexattr,
|
|
.fallocate = xfs_vn_fallocate,
|
|
};
|
|
|
|
const struct inode_operations xfs_dir_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
.rmdir = xfs_vn_rmdir,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.permission = xfs_vn_permission,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = xfs_vn_setxattr,
|
|
.getxattr = xfs_vn_getxattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.removexattr = xfs_vn_removexattr,
|
|
};
|
|
|
|
const struct inode_operations xfs_symlink_inode_operations = {
|
|
.readlink = generic_readlink,
|
|
.follow_link = xfs_vn_follow_link,
|
|
.put_link = xfs_vn_put_link,
|
|
.permission = xfs_vn_permission,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = xfs_vn_setxattr,
|
|
.getxattr = xfs_vn_getxattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.removexattr = xfs_vn_removexattr,
|
|
};
|