From 0e6b3e5e97e2e8a25bcfc528dad94edf5220dfeb Mon Sep 17 00:00:00 2001 From: Phillip Susi <psusi@cfl.rr.com> Date: Sat, 25 Mar 2006 03:08:14 -0800 Subject: [PATCH] [PATCH] udf: fix uid/gid options and add uid/gid=ignore and forget options As Pekka Enberg pointed out, with the if still following the else, you can still get a null uid written to the disk if you specify a default uid= without uid=forget. In other words, if the desktop user is uid=1000 and the mount option uid=1000 is given ( which is done on ubuntu automatically and probably other distributions that use hal ), then if any other user besides uid 1000 owns a file then a 0 will be written to the media as the owning uid instead. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> --- Documentation/filesystems/udf.txt | 14 ++++++++++++++ fs/udf/inode.c | 6 ++---- 2 files changed, 16 insertions(+), 4 deletions(-) diff --git a/Documentation/filesystems/udf.txt b/Documentation/filesystems/udf.txt index e5213bc301f72..511b4230c0536 100644 --- a/Documentation/filesystems/udf.txt +++ b/Documentation/filesystems/udf.txt @@ -26,6 +26,20 @@ The following mount options are supported: nostrict Unset strict conformance iocharset= Set the NLS character set +The uid= and gid= options need a bit more explaining. They will accept a +decimal numeric value which will be used as the default ID for that mount. +They will also accept the string "ignore" and "forget". For files on the disk +that are owned by nobody ( -1 ), they will instead look as if they are owned +by the default ID. The ignore option causes the default ID to override all +IDs on the disk, not just -1. The forget option causes all IDs to be written +to disk as -1, so when the media is later remounted, they will appear to be +owned by whatever default ID it is mounted with at that time. + +For typical desktop use of removable media, you should set the ID to that +of the interactively logged on user, and also specify both the forget and +ignore options. This way the interactive user will always see the files +on the disk as belonging to him. + The remaining are for debugging and disaster recovery: novrs Skip volume sequence recognition diff --git a/fs/udf/inode.c b/fs/udf/inode.c index d04cff2273b68..81e0e8459af11 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -1341,13 +1341,11 @@ udf_update_inode(struct inode *inode, int do_sync) if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) fe->uid = cpu_to_le32(-1); - else if (inode->i_uid != UDF_SB(inode->i_sb)->s_uid) - fe->uid = cpu_to_le32(inode->i_uid); + else fe->uid = cpu_to_le32(inode->i_uid); if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) fe->gid = cpu_to_le32(-1); - else if (inode->i_gid != UDF_SB(inode->i_sb)->s_gid) - fe->gid = cpu_to_le32(inode->i_gid); + else fe->gid = cpu_to_le32(inode->i_gid); udfperms = ((inode->i_mode & S_IRWXO) ) | ((inode->i_mode & S_IRWXG) << 2) | -- GitLab