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| author | Phillip Susi <psusi@cfl.rr.com> | 2006-03-25 11:08:14 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 16:23:00 (GMT) |
| commit | 0e6b3e5e97e2e8a25bcfc528dad94edf5220dfeb (patch) | |
| tree | de537ca068cd7fc2a1d20a47f16c9091cf4c64ff | |
| parent | 11b0b5abb2097a63c1081d9b7e825b987b227972 (diff) | |
| download | linux-0e6b3e5e97e2e8a25bcfc528dad94edf5220dfeb.tar.xz | |
[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>
| -rw-r--r-- | Documentation/filesystems/udf.txt | 14 | ||||
| -rw-r--r-- | 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 e5213bc..511b423 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 d04cff2..81e0e84 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) | |