diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_inode_fork.c')
-rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.c | 320 |
1 files changed, 156 insertions, 164 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c index 518c6f0ec3a6..28b366275ae0 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.c +++ b/fs/xfs/libxfs/xfs_inode_fork.c @@ -26,110 +26,6 @@ kmem_zone_t *xfs_ifork_zone; -STATIC int xfs_iformat_local(xfs_inode_t *, xfs_dinode_t *, int, int); -STATIC int xfs_iformat_extents(xfs_inode_t *, xfs_dinode_t *, int); -STATIC int xfs_iformat_btree(xfs_inode_t *, xfs_dinode_t *, int); - -/* - * Copy inode type and data and attr format specific information from the - * on-disk inode to the in-core inode and fork structures. For fifos, devices, - * and sockets this means set i_rdev to the proper value. For files, - * directories, and symlinks this means to bring in the in-line data or extent - * pointers as well as the attribute fork. For a fork in B-tree format, only - * the root is immediately brought in-core. The rest will be read in later when - * first referenced (see xfs_iread_extents()). - */ -int -xfs_iformat_fork( - struct xfs_inode *ip, - struct xfs_dinode *dip) -{ - struct inode *inode = VFS_I(ip); - struct xfs_attr_shortform *atp; - int size; - int error = 0; - xfs_fsize_t di_size; - - switch (inode->i_mode & S_IFMT) { - case S_IFIFO: - case S_IFCHR: - case S_IFBLK: - case S_IFSOCK: - ip->i_d.di_size = 0; - inode->i_rdev = xfs_to_linux_dev_t(xfs_dinode_get_rdev(dip)); - break; - - case S_IFREG: - case S_IFLNK: - case S_IFDIR: - switch (dip->di_format) { - case XFS_DINODE_FMT_LOCAL: - di_size = be64_to_cpu(dip->di_size); - size = (int)di_size; - error = xfs_iformat_local(ip, dip, XFS_DATA_FORK, size); - break; - case XFS_DINODE_FMT_EXTENTS: - error = xfs_iformat_extents(ip, dip, XFS_DATA_FORK); - break; - case XFS_DINODE_FMT_BTREE: - error = xfs_iformat_btree(ip, dip, XFS_DATA_FORK); - break; - default: - xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__, - dip, sizeof(*dip), __this_address); - return -EFSCORRUPTED; - } - break; - - default: - xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__, dip, - sizeof(*dip), __this_address); - return -EFSCORRUPTED; - } - if (error) - return error; - - if (xfs_is_reflink_inode(ip)) { - ASSERT(ip->i_cowfp == NULL); - xfs_ifork_init_cow(ip); - } - - if (!XFS_DFORK_Q(dip)) - return 0; - - ASSERT(ip->i_afp == NULL); - ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_NOFS); - - switch (dip->di_aformat) { - case XFS_DINODE_FMT_LOCAL: - atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip); - size = be16_to_cpu(atp->hdr.totsize); - - error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size); - break; - case XFS_DINODE_FMT_EXTENTS: - error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK); - break; - case XFS_DINODE_FMT_BTREE: - error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK); - break; - default: - xfs_inode_verifier_error(ip, error, __func__, dip, - sizeof(*dip), __this_address); - error = -EFSCORRUPTED; - break; - } - if (error) { - kmem_cache_free(xfs_ifork_zone, ip->i_afp); - ip->i_afp = NULL; - if (ip->i_cowfp) - kmem_cache_free(xfs_ifork_zone, ip->i_cowfp); - ip->i_cowfp = NULL; - xfs_idestroy_fork(ip, XFS_DATA_FORK); - } - return error; -} - void xfs_init_local_fork( struct xfs_inode *ip, @@ -292,12 +188,11 @@ xfs_iformat_btree( * or the number of extents is greater than the number of * blocks. */ - if (unlikely(XFS_IFORK_NEXTENTS(ip, whichfork) <= - XFS_IFORK_MAXEXT(ip, whichfork) || + if (unlikely(ifp->if_nextents <= XFS_IFORK_MAXEXT(ip, whichfork) || nrecs == 0 || XFS_BMDR_SPACE_CALC(nrecs) > XFS_DFORK_SIZE(dip, mp, whichfork) || - XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks) || + ifp->if_nextents > ip->i_d.di_nblocks) || level == 0 || level > XFS_BTREE_MAXLEVELS) { xfs_warn(mp, "corrupt inode %Lu (btree).", (unsigned long long) ip->i_ino); @@ -325,6 +220,110 @@ xfs_iformat_btree( return 0; } +int +xfs_iformat_data_fork( + struct xfs_inode *ip, + struct xfs_dinode *dip) +{ + struct inode *inode = VFS_I(ip); + int error; + + /* + * Initialize the extent count early, as the per-format routines may + * depend on it. + */ + ip->i_df.if_format = dip->di_format; + ip->i_df.if_nextents = be32_to_cpu(dip->di_nextents); + + switch (inode->i_mode & S_IFMT) { + case S_IFIFO: + case S_IFCHR: + case S_IFBLK: + case S_IFSOCK: + ip->i_d.di_size = 0; + inode->i_rdev = xfs_to_linux_dev_t(xfs_dinode_get_rdev(dip)); + return 0; + case S_IFREG: + case S_IFLNK: + case S_IFDIR: + switch (ip->i_df.if_format) { + case XFS_DINODE_FMT_LOCAL: + error = xfs_iformat_local(ip, dip, XFS_DATA_FORK, + be64_to_cpu(dip->di_size)); + if (!error) + error = xfs_ifork_verify_local_data(ip); + return error; + case XFS_DINODE_FMT_EXTENTS: + return xfs_iformat_extents(ip, dip, XFS_DATA_FORK); + case XFS_DINODE_FMT_BTREE: + return xfs_iformat_btree(ip, dip, XFS_DATA_FORK); + default: + xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__, + dip, sizeof(*dip), __this_address); + return -EFSCORRUPTED; + } + break; + default: + xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__, dip, + sizeof(*dip), __this_address); + return -EFSCORRUPTED; + } +} + +static uint16_t +xfs_dfork_attr_shortform_size( + struct xfs_dinode *dip) +{ + struct xfs_attr_shortform *atp = + (struct xfs_attr_shortform *)XFS_DFORK_APTR(dip); + + return be16_to_cpu(atp->hdr.totsize); +} + +int +xfs_iformat_attr_fork( + struct xfs_inode *ip, + struct xfs_dinode *dip) +{ + int error = 0; + + /* + * Initialize the extent count early, as the per-format routines may + * depend on it. + */ + ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_NOFS); + ip->i_afp->if_format = dip->di_aformat; + if (unlikely(ip->i_afp->if_format == 0)) /* pre IRIX 6.2 file system */ + ip->i_afp->if_format = XFS_DINODE_FMT_EXTENTS; + ip->i_afp->if_nextents = be16_to_cpu(dip->di_anextents); + + switch (ip->i_afp->if_format) { + case XFS_DINODE_FMT_LOCAL: + error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, + xfs_dfork_attr_shortform_size(dip)); + if (!error) + error = xfs_ifork_verify_local_attr(ip); + break; + case XFS_DINODE_FMT_EXTENTS: + error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK); + break; + case XFS_DINODE_FMT_BTREE: + error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK); + break; + default: + xfs_inode_verifier_error(ip, error, __func__, dip, + sizeof(*dip), __this_address); + error = -EFSCORRUPTED; + break; + } + + if (error) { + kmem_cache_free(xfs_ifork_zone, ip->i_afp); + ip->i_afp = NULL; + } + return error; +} + /* * Reallocate the space for if_broot based on the number of records * being added or deleted as indicated in rec_diff. Move the records @@ -504,38 +503,24 @@ xfs_idata_realloc( void xfs_idestroy_fork( - xfs_inode_t *ip, - int whichfork) + struct xfs_ifork *ifp) { - struct xfs_ifork *ifp; - - ifp = XFS_IFORK_PTR(ip, whichfork); if (ifp->if_broot != NULL) { kmem_free(ifp->if_broot); ifp->if_broot = NULL; } /* - * If the format is local, then we can't have an extents - * array so just look for an inline data array. If we're - * not local then we may or may not have an extents list, - * so check and free it up if we do. + * If the format is local, then we can't have an extents array so just + * look for an inline data array. If we're not local then we may or may + * not have an extents list, so check and free it up if we do. */ - if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { - if (ifp->if_u1.if_data != NULL) { - kmem_free(ifp->if_u1.if_data); - ifp->if_u1.if_data = NULL; - } - } else if ((ifp->if_flags & XFS_IFEXTENTS) && ifp->if_height) { - xfs_iext_destroy(ifp); - } - - if (whichfork == XFS_ATTR_FORK) { - kmem_cache_free(xfs_ifork_zone, ip->i_afp); - ip->i_afp = NULL; - } else if (whichfork == XFS_COW_FORK) { - kmem_cache_free(xfs_ifork_zone, ip->i_cowfp); - ip->i_cowfp = NULL; + if (ifp->if_format == XFS_DINODE_FMT_LOCAL) { + kmem_free(ifp->if_u1.if_data); + ifp->if_u1.if_data = NULL; + } else if (ifp->if_flags & XFS_IFEXTENTS) { + if (ifp->if_height) + xfs_iext_destroy(ifp); } } @@ -592,7 +577,7 @@ void xfs_iflush_fork( xfs_inode_t *ip, xfs_dinode_t *dip, - xfs_inode_log_item_t *iip, + struct xfs_inode_log_item *iip, int whichfork) { char *cp; @@ -618,7 +603,7 @@ xfs_iflush_fork( } cp = XFS_DFORK_PTR(dip, whichfork); mp = ip->i_mount; - switch (XFS_IFORK_FORMAT(ip, whichfork)) { + switch (ifp->if_format) { case XFS_DINODE_FMT_LOCAL: if ((iip->ili_fields & dataflag[whichfork]) && (ifp->if_bytes > 0)) { @@ -633,7 +618,7 @@ xfs_iflush_fork( !(iip->ili_fields & extflag[whichfork])); if ((iip->ili_fields & extflag[whichfork]) && (ifp->if_bytes > 0)) { - ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0); + ASSERT(ifp->if_nextents > 0); (void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp, whichfork); } @@ -691,48 +676,55 @@ xfs_ifork_init_cow( ip->i_cowfp = kmem_zone_zalloc(xfs_ifork_zone, KM_NOFS); ip->i_cowfp->if_flags = XFS_IFEXTENTS; - ip->i_cformat = XFS_DINODE_FMT_EXTENTS; - ip->i_cnextents = 0; + ip->i_cowfp->if_format = XFS_DINODE_FMT_EXTENTS; } -/* Default fork content verifiers. */ -struct xfs_ifork_ops xfs_default_ifork_ops = { - .verify_attr = xfs_attr_shortform_verify, - .verify_dir = xfs_dir2_sf_verify, - .verify_symlink = xfs_symlink_shortform_verify, -}; - /* Verify the inline contents of the data fork of an inode. */ -xfs_failaddr_t -xfs_ifork_verify_data( - struct xfs_inode *ip, - struct xfs_ifork_ops *ops) +int +xfs_ifork_verify_local_data( + struct xfs_inode *ip) { - /* Non-local data fork, we're done. */ - if (ip->i_d.di_format != XFS_DINODE_FMT_LOCAL) - return NULL; + xfs_failaddr_t fa = NULL; - /* Check the inline data fork if there is one. */ switch (VFS_I(ip)->i_mode & S_IFMT) { case S_IFDIR: - return ops->verify_dir(ip); + fa = xfs_dir2_sf_verify(ip); + break; case S_IFLNK: - return ops->verify_symlink(ip); + fa = xfs_symlink_shortform_verify(ip); + break; default: - return NULL; + break; } + + if (fa) { + xfs_inode_verifier_error(ip, -EFSCORRUPTED, "data fork", + ip->i_df.if_u1.if_data, ip->i_df.if_bytes, fa); + return -EFSCORRUPTED; + } + + return 0; } /* Verify the inline contents of the attr fork of an inode. */ -xfs_failaddr_t -xfs_ifork_verify_attr( - struct xfs_inode *ip, - struct xfs_ifork_ops *ops) +int +xfs_ifork_verify_local_attr( + struct xfs_inode *ip) { - /* There has to be an attr fork allocated if aformat is local. */ - if (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL) - return NULL; - if (!XFS_IFORK_PTR(ip, XFS_ATTR_FORK)) - return __this_address; - return ops->verify_attr(ip); + struct xfs_ifork *ifp = ip->i_afp; + xfs_failaddr_t fa; + + if (!ifp) + fa = __this_address; + else + fa = xfs_attr_shortform_verify(ip); + + if (fa) { + xfs_inode_verifier_error(ip, -EFSCORRUPTED, "attr fork", + ifp ? ifp->if_u1.if_data : NULL, + ifp ? ifp->if_bytes : 0, fa); + return -EFSCORRUPTED; + } + + return 0; } |