diff options
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_iops.c')
-rw-r--r-- | fs/xfs/linux-2.6/xfs_iops.c | 127 |
1 files changed, 86 insertions, 41 deletions
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 14215a7db59..4bd3d03b23e 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -51,8 +51,47 @@ #include "xfs_buf_item.h" #include "xfs_utils.h" +#include <linux/capability.h> #include <linux/xattr.h> #include <linux/namei.h> +#include <linux/security.h> + +#define IS_NOATIME(inode) ((inode->i_sb->s_flags & MS_NOATIME) || \ + (S_ISDIR(inode->i_mode) && inode->i_sb->s_flags & MS_NODIRATIME)) + +/* + * Get a XFS inode from a given vnode. + */ +xfs_inode_t * +xfs_vtoi( + struct vnode *vp) +{ + bhv_desc_t *bdp; + + bdp = bhv_lookup_range(VN_BHV_HEAD(vp), + VNODE_POSITION_XFS, VNODE_POSITION_XFS); + if (unlikely(bdp == NULL)) + return NULL; + return XFS_BHVTOI(bdp); +} + +/* + * Bring the atime in the XFS inode uptodate. + * Used before logging the inode to disk or when the Linux inode goes away. + */ +void +xfs_synchronize_atime( + xfs_inode_t *ip) +{ + vnode_t *vp; + + vp = XFS_ITOV_NULL(ip); + if (vp) { + struct inode *inode = &vp->v_inode; + ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; + ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; + } +} /* * Change the requested timestamp in the given inode. @@ -73,23 +112,6 @@ xfs_ichgtime( struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); timespec_t tv; - /* - * We're not supposed to change timestamps in readonly-mounted - * filesystems. Throw it away if anyone asks us. - */ - if (unlikely(IS_RDONLY(inode))) - return; - - /* - * Don't update access timestamps on reads if mounted "noatime". - * Throw it away if anyone asks us. - */ - if (unlikely( - (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && - (flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == - XFS_ICHGTIME_ACC)) - return; - nanotime(&tv); if (flags & XFS_ICHGTIME_MOD) { inode->i_mtime = tv; @@ -126,8 +148,6 @@ xfs_ichgtime( * Variant on the above which avoids querying the system clock * in situations where we know the Linux inode timestamps have * just been updated (and so we can update our inode cheaply). - * We also skip the readonly and noatime checks here, they are - * also catered for already. */ void xfs_ichgtime_fast( @@ -138,20 +158,16 @@ xfs_ichgtime_fast( timespec_t *tvp; /* - * We're not supposed to change timestamps in readonly-mounted - * filesystems. Throw it away if anyone asks us. + * Atime updates for read() & friends are handled lazily now, and + * explicit updates must go through xfs_ichgtime() */ - if (unlikely(IS_RDONLY(inode))) - return; + ASSERT((flags & XFS_ICHGTIME_ACC) == 0); /* - * Don't update access timestamps on reads if mounted "noatime". - * Throw it away if anyone asks us. + * We're not supposed to change timestamps in readonly-mounted + * filesystems. Throw it away if anyone asks us. */ - if (unlikely( - (ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) && - ((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG)) == - XFS_ICHGTIME_ACC))) + if (unlikely(IS_RDONLY(inode))) return; if (flags & XFS_ICHGTIME_MOD) { @@ -159,11 +175,6 @@ xfs_ichgtime_fast( ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; } - if (flags & XFS_ICHGTIME_ACC) { - tvp = &inode->i_atime; - ip->i_d.di_atime.t_sec = (__int32_t)tvp->tv_sec; - ip->i_d.di_atime.t_nsec = (__int32_t)tvp->tv_nsec; - } if (flags & XFS_ICHGTIME_CHG) { tvp = &inode->i_ctime; ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; @@ -203,13 +214,46 @@ validate_fields( ip->i_nlink = va.va_nlink; ip->i_blocks = va.va_nblocks; - /* we're under i_sem so i_size can't change under us */ + /* we're under i_mutex so i_size can't change under us */ if (i_size_read(ip) != va.va_size) i_size_write(ip, va.va_size); } } /* + * Hook in SELinux. This is not quite correct yet, what we really need + * here (as we do for default ACLs) is a mechanism by which creation of + * these attrs can be journalled at inode creation time (along with the + * inode, of course, such that log replay can't cause these to be lost). + */ +STATIC int +linvfs_init_security( + struct vnode *vp, + struct inode *dir) +{ + struct inode *ip = LINVFS_GET_IP(vp); + size_t length; + void *value; + char *name; + int error; + + error = security_inode_init_security(ip, dir, &name, &value, &length); + if (error) { + if (error == -EOPNOTSUPP) + return 0; + return -error; + } + + VOP_ATTR_SET(vp, name, value, length, ATTR_SECURE, NULL, error); + if (!error) + VMODIFY(vp); + + kfree(name); + kfree(value); + return error; +} + +/* * Determine whether a process has a valid fs_struct (kernel daemons * like knfsd don't have an fs_struct). * @@ -274,6 +318,9 @@ linvfs_mknod( break; } + if (!error) + error = linvfs_init_security(vp, dir); + if (default_acl) { if (!error) { error = _ACL_INHERIT(vp, &va, default_acl); @@ -290,8 +337,6 @@ linvfs_mknod( teardown.d_inode = ip = LINVFS_GET_IP(vp); teardown.d_name = dentry->d_name; - vn_mark_bad(vp); - if (S_ISDIR(mode)) VOP_RMDIR(dvp, &teardown, NULL, err2); else @@ -502,7 +547,7 @@ linvfs_follow_link( ASSERT(dentry); ASSERT(nd); - link = (char *)kmalloc(MAXNAMELEN+1, GFP_KERNEL); + link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL); if (!link) { nd_set_link(nd, ERR_PTR(-ENOMEM)); return NULL; @@ -518,12 +563,12 @@ linvfs_follow_link( vp = LINVFS_GET_VP(dentry->d_inode); iov.iov_base = link; - iov.iov_len = MAXNAMELEN; + iov.iov_len = MAXPATHLEN; uio->uio_iov = &iov; uio->uio_offset = 0; uio->uio_segflg = UIO_SYSSPACE; - uio->uio_resid = MAXNAMELEN; + uio->uio_resid = MAXPATHLEN; uio->uio_iovcnt = 1; VOP_READLINK(vp, uio, 0, NULL, error); @@ -531,7 +576,7 @@ linvfs_follow_link( kfree(link); link = ERR_PTR(-error); } else { - link[MAXNAMELEN - uio->uio_resid] = '\0'; + link[MAXPATHLEN - uio->uio_resid] = '\0'; } kfree(uio); |