From e58ac1770ded2a316447ca7608bb7809af82eca6 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 25 Apr 2024 15:17:03 +0200 Subject: [PATCH] xfs: refactor dir format helpers Add a new enum and a xfs_dir2_format helper that returns it to allow the code to switch on the format of a directory in a single operation and switch all helpers of xfs_dir2_isblock and xfs_dir2_isleaf to it. This also removes the explicit xfs_iread_extents call in a few of the call sites given that xfs_bmap_last_offset already takes care of it underneath. Signed-off-by: Christoph Hellwig Reviewed-by: "Darrick J. Wong" Signed-off-by: Chandan Babu R --- fs/xfs/libxfs/xfs_dir2.c | 188 ++++++++++++++--------------------- fs/xfs/libxfs/xfs_dir2.h | 12 ++- fs/xfs/libxfs/xfs_exchmaps.c | 9 +- fs/xfs/scrub/dir.c | 3 +- fs/xfs/scrub/readdir.c | 24 ++--- fs/xfs/xfs_dir2_readdir.c | 19 ++-- 6 files changed, 105 insertions(+), 150 deletions(-) diff --git a/fs/xfs/libxfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c index d3d4d80c2098..457f9a38f850 100644 --- a/fs/xfs/libxfs/xfs_dir2.c +++ b/fs/xfs/libxfs/xfs_dir2.c @@ -256,31 +256,60 @@ xfs_dir_init( return error; } +enum xfs_dir2_fmt +xfs_dir2_format( + struct xfs_da_args *args, + int *error) +{ + struct xfs_inode *dp = args->dp; + struct xfs_mount *mp = dp->i_mount; + struct xfs_da_geometry *geo = mp->m_dir_geo; + xfs_fileoff_t eof; + + xfs_assert_ilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL); + + *error = 0; + if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) + return XFS_DIR2_FMT_SF; + + *error = xfs_bmap_last_offset(dp, &eof, XFS_DATA_FORK); + if (*error) + return XFS_DIR2_FMT_ERROR; + + if (eof == XFS_B_TO_FSB(mp, geo->blksize)) { + if (XFS_IS_CORRUPT(mp, dp->i_disk_size != geo->blksize)) { + xfs_da_mark_sick(args); + *error = -EFSCORRUPTED; + return XFS_DIR2_FMT_ERROR; + } + return XFS_DIR2_FMT_BLOCK; + } + if (eof == geo->leafblk + geo->fsbcount) + return XFS_DIR2_FMT_LEAF; + return XFS_DIR2_FMT_NODE; +} + int xfs_dir_createname_args( struct xfs_da_args *args) { - bool is_block, is_leaf; int error; if (!args->inumber) args->op_flags |= XFS_DA_OP_JUSTCHECK; - if (args->dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) + switch (xfs_dir2_format(args, &error)) { + case XFS_DIR2_FMT_SF: return xfs_dir2_sf_addname(args); - - error = xfs_dir2_isblock(args, &is_block); - if (error) - return error; - if (is_block) + case XFS_DIR2_FMT_BLOCK: return xfs_dir2_block_addname(args); - - error = xfs_dir2_isleaf(args, &is_leaf); - if (error) - return error; - if (is_leaf) + case XFS_DIR2_FMT_LEAF: return xfs_dir2_leaf_addname(args); - return xfs_dir2_node_addname(args); + case XFS_DIR2_FMT_NODE: + return xfs_dir2_node_addname(args); + default: + return error; + } } /* @@ -359,36 +388,25 @@ int xfs_dir_lookup_args( struct xfs_da_args *args) { - bool is_block, is_leaf; int error; - if (args->dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) { + switch (xfs_dir2_format(args, &error)) { + case XFS_DIR2_FMT_SF: error = xfs_dir2_sf_lookup(args); - goto out; - } - - /* dir2 functions require that the data fork is loaded */ - error = xfs_iread_extents(args->trans, args->dp, XFS_DATA_FORK); - if (error) - goto out; - - error = xfs_dir2_isblock(args, &is_block); - if (error) - goto out; - - if (is_block) { + break; + case XFS_DIR2_FMT_BLOCK: error = xfs_dir2_block_lookup(args); - goto out; + break; + case XFS_DIR2_FMT_LEAF: + error = xfs_dir2_leaf_lookup(args); + break; + case XFS_DIR2_FMT_NODE: + error = xfs_dir2_node_lookup(args); + break; + default: + break; } - error = xfs_dir2_isleaf(args, &is_leaf); - if (error) - goto out; - if (is_leaf) - error = xfs_dir2_leaf_lookup(args); - else - error = xfs_dir2_node_lookup(args); -out: if (error != -EEXIST) return error; return 0; @@ -448,24 +466,20 @@ int xfs_dir_removename_args( struct xfs_da_args *args) { - bool is_block, is_leaf; int error; - if (args->dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) + switch (xfs_dir2_format(args, &error)) { + case XFS_DIR2_FMT_SF: return xfs_dir2_sf_removename(args); - - error = xfs_dir2_isblock(args, &is_block); - if (error) - return error; - if (is_block) + case XFS_DIR2_FMT_BLOCK: return xfs_dir2_block_removename(args); - - error = xfs_dir2_isleaf(args, &is_leaf); - if (error) - return error; - if (is_leaf) + case XFS_DIR2_FMT_LEAF: return xfs_dir2_leaf_removename(args); - return xfs_dir2_node_removename(args); + case XFS_DIR2_FMT_NODE: + return xfs_dir2_node_removename(args); + default: + return error; + } } /* @@ -509,25 +523,20 @@ int xfs_dir_replace_args( struct xfs_da_args *args) { - bool is_block, is_leaf; int error; - if (args->dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) + switch (xfs_dir2_format(args, &error)) { + case XFS_DIR2_FMT_SF: return xfs_dir2_sf_replace(args); - - error = xfs_dir2_isblock(args, &is_block); - if (error) - return error; - if (is_block) + case XFS_DIR2_FMT_BLOCK: return xfs_dir2_block_replace(args); - - error = xfs_dir2_isleaf(args, &is_leaf); - if (error) - return error; - if (is_leaf) + case XFS_DIR2_FMT_LEAF: return xfs_dir2_leaf_replace(args); - - return xfs_dir2_node_replace(args); + case XFS_DIR2_FMT_NODE: + return xfs_dir2_node_replace(args); + default: + return error; + } } /* @@ -633,57 +642,6 @@ xfs_dir2_grow_inode( return 0; } -/* - * See if the directory is a single-block form directory. - */ -int -xfs_dir2_isblock( - struct xfs_da_args *args, - bool *isblock) -{ - struct xfs_mount *mp = args->dp->i_mount; - xfs_fileoff_t eof; - int error; - - error = xfs_bmap_last_offset(args->dp, &eof, XFS_DATA_FORK); - if (error) - return error; - - *isblock = false; - if (XFS_FSB_TO_B(mp, eof) != args->geo->blksize) - return 0; - - *isblock = true; - if (XFS_IS_CORRUPT(mp, args->dp->i_disk_size != args->geo->blksize)) { - xfs_da_mark_sick(args); - return -EFSCORRUPTED; - } - return 0; -} - -/* - * See if the directory is a single-leaf form directory. - */ -int -xfs_dir2_isleaf( - struct xfs_da_args *args, - bool *isleaf) -{ - xfs_fileoff_t eof; - int error; - - error = xfs_bmap_last_offset(args->dp, &eof, XFS_DATA_FORK); - if (error) - return error; - - *isleaf = false; - if (eof != args->geo->leafblk + args->geo->fsbcount) - return 0; - - *isleaf = true; - return 0; -} - /* * Remove the given block from the directory. * This routine is used for data and free blocks, leaf/node are done diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h index 6c00fe24a898..6dbe6e9ecb49 100644 --- a/fs/xfs/libxfs/xfs_dir2.h +++ b/fs/xfs/libxfs/xfs_dir2.h @@ -36,6 +36,16 @@ xfs_dir2_samename( return !memcmp(n1->name, n2->name, n1->len); } +enum xfs_dir2_fmt { + XFS_DIR2_FMT_SF, + XFS_DIR2_FMT_BLOCK, + XFS_DIR2_FMT_LEAF, + XFS_DIR2_FMT_NODE, + XFS_DIR2_FMT_ERROR, +}; + +enum xfs_dir2_fmt xfs_dir2_format(struct xfs_da_args *args, int *error); + /* * Convert inode mode to directory entry filetype */ @@ -79,8 +89,6 @@ extern int xfs_dir2_sf_to_block(struct xfs_da_args *args); /* * Interface routines used by userspace utilities */ -extern int xfs_dir2_isblock(struct xfs_da_args *args, bool *isblock); -extern int xfs_dir2_isleaf(struct xfs_da_args *args, bool *isleaf); extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, struct xfs_buf *bp); diff --git a/fs/xfs/libxfs/xfs_exchmaps.c b/fs/xfs/libxfs/xfs_exchmaps.c index 44ab6a9235c0..2021396651de 100644 --- a/fs/xfs/libxfs/xfs_exchmaps.c +++ b/fs/xfs/libxfs/xfs_exchmaps.c @@ -465,17 +465,12 @@ xfs_exchmaps_dir_to_sf( }; struct xfs_dir2_sf_hdr sfh; struct xfs_buf *bp; - bool isblock; int size; - int error; + int error = 0; - error = xfs_dir2_isblock(&args, &isblock); - if (error) + if (xfs_dir2_format(&args, &error) != XFS_DIR2_FMT_BLOCK) return error; - if (!isblock) - return 0; - error = xfs_dir3_block_read(tp, xmi->xmi_ip2, xmi->xmi_ip2->i_ino, &bp); if (error) return error; diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c index 62474d0557c4..bf9199e8df63 100644 --- a/fs/xfs/scrub/dir.c +++ b/fs/xfs/scrub/dir.c @@ -808,7 +808,8 @@ xchk_directory_blocks( free_lblk = XFS_B_TO_FSB(mp, XFS_DIR2_FREE_OFFSET); /* Is this a block dir? */ - error = xfs_dir2_isblock(&args, &is_block); + if (xfs_dir2_format(&args, &error) == XFS_DIR2_FMT_BLOCK) + is_block = true; if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, lblk, &error)) goto out; diff --git a/fs/xfs/scrub/readdir.c b/fs/xfs/scrub/readdir.c index 0ac77359d8e9..01c9a2dc0f2c 100644 --- a/fs/xfs/scrub/readdir.c +++ b/fs/xfs/scrub/readdir.c @@ -276,7 +276,6 @@ xchk_dir_walk( .trans = sc->tp, .owner = dp->i_ino, }; - bool isblock; int error; if (xfs_is_shutdown(dp->i_mount)) @@ -285,22 +284,17 @@ xchk_dir_walk( ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); xfs_assert_ilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL); - if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) + switch (xfs_dir2_format(&args, &error)) { + case XFS_DIR2_FMT_SF: return xchk_dir_walk_sf(sc, dp, dirent_fn, priv); - - /* dir2 functions require that the data fork is loaded */ - error = xfs_iread_extents(sc->tp, dp, XFS_DATA_FORK); - if (error) - return error; - - error = xfs_dir2_isblock(&args, &isblock); - if (error) - return error; - - if (isblock) + case XFS_DIR2_FMT_BLOCK: return xchk_dir_walk_block(sc, dp, dirent_fn, priv); - - return xchk_dir_walk_leaf(sc, dp, dirent_fn, priv); + case XFS_DIR2_FMT_LEAF: + case XFS_DIR2_FMT_NODE: + return xchk_dir_walk_leaf(sc, dp, dirent_fn, priv); + default: + return error; + } } /* diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c index b3abad5a6cd8..06ac5a7de60a 100644 --- a/fs/xfs/xfs_dir2_readdir.c +++ b/fs/xfs/xfs_dir2_readdir.c @@ -516,7 +516,6 @@ xfs_readdir( { struct xfs_da_args args = { NULL }; unsigned int lock_mode; - bool isblock; int error; trace_xfs_readdir(dp); @@ -539,18 +538,18 @@ xfs_readdir( return xfs_dir2_sf_getdents(&args, ctx); lock_mode = xfs_ilock_data_map_shared(dp); - error = xfs_dir2_isblock(&args, &isblock); - if (error) - goto out_unlock; - - if (isblock) { + switch (xfs_dir2_format(&args, &error)) { + case XFS_DIR2_FMT_BLOCK: error = xfs_dir2_block_getdents(&args, ctx, &lock_mode); - goto out_unlock; + break; + case XFS_DIR2_FMT_LEAF: + case XFS_DIR2_FMT_NODE: + error = xfs_dir2_leaf_getdents(&args, ctx, bufsize, &lock_mode); + break; + default: + break; } - error = xfs_dir2_leaf_getdents(&args, ctx, bufsize, &lock_mode); - -out_unlock: if (lock_mode) xfs_iunlock(dp, lock_mode); return error;