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2013-06-29[readdir] convert hostfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert afsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert ncpfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert hfsplusAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert hfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert befsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert cifsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert freevxfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert fuseAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert hpfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29reiserfs: switch reiserfs_readdir_dentry to inodeAl Viro
... and clean the callers up a bit Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29reiserfs: is_privroot_deh() needs only directory inode, actuallyAl Viro
... and that - only to get the superblock. Privroot is a directory and we don't allow hardlinks to those... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert reiserfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert ntfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert isofsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert jffs2Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert f2fsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert 9pAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert affsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert adfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert logfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert jfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert cephAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert nfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert ext4Al Viro
and trim the living hell out bogosities in inline dir case Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert qnx6Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert qnx4Al Viro
... and use strnlen() instead of strlen() - it's done on untrusted data, after all. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert omfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert nilfs2Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert sysfsAl Viro
get rid of the kludges in sysfs_readdir() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert gfs2Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert exofsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert bfsAl Viro
... and get rid of that ridiculous mutex in bfs_readdir() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert procfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert openpromfsAl Viro
what the hell is op_mutex for, BTW? Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert efsAl Viro
* sanity checks belong before risky operation, not after it * don't quit as soon as we'd found an entry Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert configfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert romfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert squashfsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert ubifsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert udfAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] convert ext3Al Viro
new helper: dir_relax(inode). Call when you are in location that will _not_ be invalidated by directory modifications (block boundary, in case of ext*). Returns whether the directory has survived (dropping i_mutex allows rmdir to kill the sucker; if it returns false to us, ->iterate() is obviously done) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] switch dcache_readdir() users to ->iterate()Al Viro
new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx), dir_emit_dots(file, ctx). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] simple local unixlike: switch to ->iterate()Al Viro
ext2, ufs, minix, sysv Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] introduce ->iterate(), ctx->pos, dir_emit()Al Viro
New method - ->iterate(file, ctx). That's the replacement for ->readdir(); it takes callback from ctx->actor, uses ctx->pos instead of file->f_pos and calls dir_emit(ctx, ...) instead of filldir(data, ...). It does *not* update file->f_pos (or look at it, for that matter); iterate_dir() does the update. Note that dir_emit() takes the offset from ctx->pos (and eventually filldir_t will lose that argument). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29[readdir] introduce iterate_dir() and dir_contextAl Viro
iterate_dir(): new helper, replacing vfs_readdir(). struct dir_context: contains the readdir callback (and will get more stuff in it), embedded into whatever data that callback wants to deal with; eventually, we'll be passing it to ->readdir() replacement instead of (data,filldir) pair. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29compat.c: LOOP_CLR_FD is taken care of in loop.c itself...Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29UBIFS: fix a horrid bugArtem Bityutskiy
Al Viro pointed me to the fact that '->readdir()' and '->llseek()' have no mutual exclusion, which means the 'ubifs_dir_llseek()' can be run while we are in the middle of 'ubifs_readdir()'. This means that 'file->private_data' can be freed while 'ubifs_readdir()' uses it, and this is a very bad bug: not only 'ubifs_readdir()' can return garbage, but this may corrupt memory and lead to all kinds of problems like crashes an security holes. This patch fixes the problem by using the 'file->f_version' field, which '->llseek()' always unconditionally sets to zero. We set it to 1 in 'ubifs_readdir()' and whenever we detect that it became 0, we know there was a seek and it is time to clear the state saved in 'file->private_data'. I tested this patch by writing a user-space program which runds readdir and seek in parallell. I could easily crash the kernel without these patches, but could not crash it with these patches. Cc: stable@vger.kernel.org Reported-by: Al Viro <viro@zeniv.linux.org.uk> Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29UBIFS: prepare to fix a horrid bugArtem Bityutskiy
Al Viro pointed me to the fact that '->readdir()' and '->llseek()' have no mutual exclusion, which means the 'ubifs_dir_llseek()' can be run while we are in the middle of 'ubifs_readdir()'. First of all, this means that 'file->private_data' can be freed while 'ubifs_readdir()' uses it. But this particular patch does not fix the problem. This patch is only a preparation, and the fix will follow next. In this patch we make 'ubifs_readdir()' stop using 'file->f_pos' directly, because 'file->f_pos' can be changed by '->llseek()' at any point. This may lead 'ubifs_readdir()' to returning inconsistent data: directory entry names may correspond to incorrect file positions. So here we introduce a local variable 'pos', read 'file->f_pose' once at very the beginning, and then stick to 'pos'. The result of this is that when 'ubifs_dir_llseek()' changes 'file->f_pos' while we are in the middle of 'ubifs_readdir()', the latter "wins". Cc: stable@vger.kernel.org Reported-by: Al Viro <viro@zeniv.linux.org.uk> Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29cifs: fill TRANS2_QUERY_FILE_INFO ByteCount fieldsDavid Disseldorp
Currently the trans2 ByteCount field is incorrectly left zero in TRANS2_QUERY_FILE_INFO info_level=SMB_QUERY_FILE_ALL_INFO and info_level=SMB_QUERY_FILE_UNIX_BASIC requests. The field should properly reflect the FID, information_level and padding bytes carried in these requests. Leaving this field zero causes such requests to fail against Novell CIFS servers. Other SMB servers (e.g. Samba) use the parameter count fields for data length calculations instead, so do not suffer the same fate. Signed-off-by: David Disseldorp <ddiss@suse.de> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
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