Messages in this thread Patch in this message | | | Subject | [PATCH 18/25] elevate writer count for do_sys_truncate() | From | Dave Hansen <> | Date | Thu, 20 Sep 2007 12:53:12 -0700 |
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Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> ---
lxc-dave/fs/open.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)
diff -puN fs/open.c~elevate-writer-count-for-do-sys-truncate fs/open.c --- lxc/fs/open.c~elevate-writer-count-for-do-sys-truncate 2007-09-20 12:16:19.000000000 -0700 +++ lxc-dave/fs/open.c 2007-09-20 12:16:19.000000000 -0700 @@ -244,21 +244,21 @@ static long do_sys_truncate(const char _ if (!S_ISREG(inode->i_mode)) goto dput_and_out; - error = vfs_permission(&nd, MAY_WRITE); + error = mnt_want_write(nd.mnt); if (error) goto dput_and_out; - error = -EROFS; - if (IS_RDONLY(inode)) - goto dput_and_out; + error = vfs_permission(&nd, MAY_WRITE); + if (error) + goto mnt_drop_write_and_out; error = -EPERM; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) - goto dput_and_out; + goto mnt_drop_write_and_out; error = get_write_access(inode); if (error) - goto dput_and_out; + goto mnt_drop_write_and_out; /* * Make sure that there are no leases. get_write_access() protects @@ -276,6 +276,8 @@ static long do_sys_truncate(const char _ put_write_and_out: put_write_access(inode); +mnt_drop_write_and_out: + mnt_drop_write(nd.mnt); dput_and_out: path_release(&nd); out: _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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