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Date: Mon, 25 Nov 2013 09:49:46 -0800
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 10/25] debugfs: handle 64bit block numbers
On Mon, Nov 25, 2013 at 04:33:02PM +0800, Zheng Liu wrote:
> On Thu, Oct 17, 2013 at 09:50:01PM -0700, Darrick J. Wong wrote:
> > debugfs should use strtoull wrappers for reading block numbers from
> > the command line. "unsigned long" isn't wide enough to handle block
> > numbers on 32bit platforms.
> >
> > Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
> > ---
> > debugfs/debugfs.c | 33 ++++++++++++++++++++++-----------
> > debugfs/extent_inode.c | 22 +++++++++-------------
> > debugfs/util.c | 2 +-
> > 3 files changed, 32 insertions(+), 25 deletions(-)
> >
> >
> > diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
> > index d3db356..46fcd07 100644
> > --- a/debugfs/debugfs.c
> > +++ b/debugfs/debugfs.c
> > @@ -181,8 +181,7 @@ void do_open_filesys(int argc, char **argv)
> > return;
> > break;
> > case 's':
> > - superblock = parse_ulong(optarg, argv[0],
> > - "superblock number", &err);
> > + err = strtoblk(argv[0], optarg, &superblock);
> > if (err)
> > return;
> > break;
> > @@ -277,14 +276,17 @@ void do_init_filesys(int argc, char **argv)
> > struct ext2_super_block param;
> > errcode_t retval;
> > int err;
> > + blk64_t blocks;
> >
> > if (common_args_process(argc, argv, 3, 3, "initialize",
> > "<device> <blocksize>", CHECK_FS_NOTOPEN))
> ^^^^^^^^^
> To be honest, I never use this command in debugfs. I am a little
> confused. If I understand correctly, we should pass a parameter as the
> number of blocks. But obviously here the usage tells us that we should
> pass a parameter as the block size. Do we need to fix it?
Yup. That help text is incorrect. I'll add it to my stack.
--D
>
> - Zheng
>
> > return;
> >
> > memset(¶m, 0, sizeof(struct ext2_super_block));
> > - ext2fs_blocks_count_set(¶m, parse_ulong(argv[2], argv[0],
> > - "blocks count", &err));
> > + err = strtoblk(argv[0], argv[2], &blocks);
> > + if (err)
> > + return;
> > + ext2fs_blocks_count_set(¶m, blocks);
> > if (err)
> > return;
> > retval = ext2fs_initialize(argv[1], 0, ¶m,
> > @@ -2109,7 +2111,9 @@ void do_bmap(int argc, char *argv[])
> > ino = string_to_inode(argv[1]);
> > if (!ino)
> > return;
> > - blk = parse_ulong(argv[2], argv[0], "logical_block", &err);
> > + err = strtoblk(argv[0], argv[2], &blk);
> > + if (err)
> > + return;
> >
> > errcode = ext2fs_bmap2(current_fs, ino, 0, 0, 0, blk, 0, &pblk);
> > if (errcode) {
> > @@ -2254,10 +2258,14 @@ void do_punch(int argc, char *argv[])
> > ino = string_to_inode(argv[1]);
> > if (!ino)
> > return;
> > - start = parse_ulong(argv[2], argv[0], "logical_block", &err);
> > - if (argc == 4)
> > - end = parse_ulong(argv[3], argv[0], "logical_block", &err);
> > - else
> > + err = strtoblk(argv[0], argv[2], &start);
> > + if (err)
> > + return;
> > + if (argc == 4) {
> > + err = strtoblk(argv[0], argv[3], &end);
> > + if (err)
> > + return;
> > + } else
> > end = ~0;
> >
> > errcode = ext2fs_punch(current_fs, ino, 0, 0, start, end);
> > @@ -2474,8 +2482,11 @@ int main(int argc, char **argv)
> > "block size", 0);
> > break;
> > case 's':
> > - superblock = parse_ulong(optarg, argv[0],
> > - "superblock number", 0);
> > + retval = strtoblk(argv[0], optarg, &superblock);
> > + if (retval) {
> > + com_err(argv[0], retval, 0, debug_prog_name);
> > + return 1;
> > + }
> > break;
> > case 'c':
> > catastrophic = 1;
> > diff --git a/debugfs/extent_inode.c b/debugfs/extent_inode.c
> > index 0bbc4c5..75e328c 100644
> > --- a/debugfs/extent_inode.c
> > +++ b/debugfs/extent_inode.c
> > @@ -264,7 +264,7 @@ void do_replace_node(int argc, char *argv[])
> > return;
> > }
> >
> > - extent.e_lblk = parse_ulong(argv[1], argv[0], "logical block", &err);
> > + err = strtoblk(argv[0], argv[1], &extent.e_lblk);
> > if (err)
> > return;
> >
> > @@ -272,7 +272,7 @@ void do_replace_node(int argc, char *argv[])
> > if (err)
> > return;
> >
> > - extent.e_pblk = parse_ulong(argv[3], argv[0], "logical block", &err);
> > + err = strtoblk(argv[0], argv[3], &extent.e_pblk);
> > if (err)
> > return;
> >
> > @@ -338,8 +338,7 @@ void do_insert_node(int argc, char *argv[])
> > return;
> > }
> >
> > - extent.e_lblk = parse_ulong(argv[1], cmd,
> > - "logical block", &err);
> > + err = strtoblk(cmd, argv[1], &extent.e_lblk);
> > if (err)
> > return;
> >
> > @@ -348,8 +347,7 @@ void do_insert_node(int argc, char *argv[])
> > if (err)
> > return;
> >
> > - extent.e_pblk = parse_ulong(argv[3], cmd,
> > - "pysical block", &err);
> > + err = strtoblk(cmd, argv[3], &extent.e_pblk);
> > if (err)
> > return;
> >
> > @@ -366,8 +364,8 @@ void do_set_bmap(int argc, char **argv)
> > const char *usage = "[--uninit] <lblk> <pblk>";
> > struct ext2fs_extent extent;
> > errcode_t retval;
> > - blk_t logical;
> > - blk_t physical;
> > + blk64_t logical;
> > + blk64_t physical;
> > char *cmd = argv[0];
> > int flags = 0;
> > int err;
> > @@ -387,18 +385,16 @@ void do_set_bmap(int argc, char **argv)
> > return;
> > }
> >
> > - logical = parse_ulong(argv[1], cmd,
> > - "logical block", &err);
> > + err = strtoblk(cmd, argv[1], &logical);
> > if (err)
> > return;
> >
> > - physical = parse_ulong(argv[2], cmd,
> > - "physical block", &err);
> > + err = strtoblk(cmd, argv[2], &physical);
> > if (err)
> > return;
> >
> > retval = ext2fs_extent_set_bmap(current_handle, logical,
> > - (blk64_t) physical, flags);
> > + physical, flags);
> > if (retval) {
> > com_err(cmd, retval, 0);
> > return;
> > diff --git a/debugfs/util.c b/debugfs/util.c
> > index cf3a6c6..09088e0 100644
> > --- a/debugfs/util.c
> > +++ b/debugfs/util.c
> > @@ -377,7 +377,7 @@ int common_block_args_process(int argc, char *argv[],
> > }
> >
> > if (argc > 2) {
> > - *count = parse_ulong(argv[2], argv[0], "count", &err);
> > + err = strtoblk(argv[0], argv[2], count);
> > if (err)
> > return 1;
> > }
> >
> > --
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