changelog

linux-2.6.15.6

Work sponsored by SGI

- Set inode->i_size to correct size for symlinks
  Thanks to Jeremy Fitzhardinge <[e-mail]>

- Only give lookup() method to directories to comply with new VFS
  assumptions

- Remove unnecessary tests in symlink methods

- Don't kill existing block ops in <devfs_read_inode>

- Restore auto-ownership for /dev/pty/m*
===============================================================================
Changes for patch v163

Work sponsored by SGI

- Don't create missing directories in <devfs_find_handle>

- Removed Documentation/filesystems/devfs/mk-devlinks

- Updated Documentation/filesystems/devfs/README
===============================================================================
Changes for patch v164

Work sponsored by SGI

- Fixed CONFIG_DEVFS breakage in drivers/char/serial.c introduced in
  linux-2.3.99-pre6-7
===============================================================================
Changes for patch v165

Work sponsored by SGI

- Ported to kernel 2.3.99-pre6
===============================================================================
Changes for patch v166

Work sponsored by SGI

- Added CONFIG_DEVFS_MOUNT
===============================================================================
Changes for patch v167

Work sponsored by SGI

- Updated Documentation/filesystems/devfs/README

- Updated sample modules.conf
===============================================================================
Changes for patch v168

Work sponsored by SGI

- Disabled multi-mount capability (use VFS bindings instead)

- Updated README from master HTML file
===============================================================================
Changes for patch v169

Work sponsored by SGI

- Removed multi-mount code

- Removed compatibility macros: VFS has changed too much
===============================================================================
Changes for patch v170

Work sponsored by SGI

- Updated README from master HTML file

- Merged devfs inode into devfs entry
===============================================================================
Changes for patch v171

Work sponsored by SGI

- Updated sample modules.conf

- Removed dead code in <devfs_register> which used to call
  <free_dentries>

- Ported to kernel 2.4.0-test2-pre3
===============================================================================
Changes for patch v172

Work sponsored by SGI

- Changed interface to <devfs_register>

- Changed interface to <devfs_register_series>
===============================================================================
Changes for patch v173

Work sponsored by SGI

- Simplified interface to <devfs_mk_symlink>

- Simplified interface to <devfs_mk_dir>

- Simplified interface to <devfs_find_handle>
===============================================================================
Changes for patch v174

Work sponsored by SGI

- Updated README from master HTML file
===============================================================================
Changes for patch v175

Work sponsored by SGI

- DocBook update for fs/devfs/base.c
  Thanks to Tim Waugh <[e-mail]>

- Removed stale fs/tunnel.c (was never used or completed)
===============================================================================
Changes for patch v176

Work sponsored by SGI

- Updated ToDo list

- Removed sample modules.conf: now distributed with devfsd

- Updated README from master HTML file

- Ported to kernel 2.4.0-test3-pre4 (which had devfs-patch-v174)
===============================================================================
Changes for patch v177

- Updated README from master HTML file

- Documentation cleanups

- Ensure <devfs_generate_path> terminates string for root entry
  Thanks to Tim Jansen <[e-mail]>

- Exported <devfs_get_name> to modules

- Make <devfs_mk_symlink> send events to devfsd

- Cleaned up option processing in <devfs_setup>

- Fixed bugs in handling symlinks: could leak or cause Oops

- Cleaned up directory handling by separating fops
  Thanks to Alexander Viro <[e-mail]>
===============================================================================
Changes for patch v178

- Fixed handling of inverted options in <devfs_setup>
===============================================================================
Changes for patch v179

- Adjusted <try_modload> to account for <devfs_generate_path> fix
===============================================================================
Changes for patch v180

- Fixed !CONFIG_DEVFS_FS stub declaration of <devfs_get_info>
===============================================================================
Changes for patch v181

- Answered question posed by Al Viro and removed his comments from <devfs_open>

- Moved setting of registered flag after other fields are changed

- Fixed race between <devfsd_close> and <devfsd_notify_one>

- Global VFS changes added bogus BKL to devfsd_close(): removed

- Widened locking in <devfs_readlink> and <devfs_follow_link>

- Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc

- Simplified locking in <devfsd_ioctl> and fixed memory leak
===============================================================================
Changes for patch v182

- Created <devfs_*alloc_major> and <devfs_*alloc_devnum>

- Removed broken devnum allocation and use <devfs_alloc_devnum>

- Fixed old devnum leak by calling new <devfs_dealloc_devnum>

- Created <devfs_*alloc_unique_number>

- Fixed number leak for /dev/cdroms/cdrom%d

- Fixed number leak for /dev/discs/disc%d
===============================================================================
Changes for patch v183

- Fixed bug in <devfs_setup> which could hang boot process
===============================================================================
Changes for patch v184

- Documentation typo fix for fs/devfs/util.c

- Fixed drivers/char/stallion.c for devfs

- Added DEVFSD_NOTIFY_DELETE event

- Updated README from master HTML file

- Removed #include <asm/segment.h> from fs/devfs/base.c
===============================================================================
Changes for patch v185

- Made <block_semaphore> and <char_semaphore> in fs/devfs/util.c
  private

- Fixed inode table races by removing it and using inode->u.generic_ip
  instead

- Moved <devfs_read_inode> into <get_vfs_inode>

- Moved <devfs_write_inode> into <devfs_notify_change>
===============================================================================
Changes for patch v186

- Fixed race in <devfs_do_symlink> for uni-processor

- Updated README from master HTML file
===============================================================================
Changes for patch v187

- Fixed drivers/char/stallion.c for devfs

- Fixed drivers/char/rocket.c for devfs

- Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers
===============================================================================
Changes for patch v188

- Updated major masks in fs/devfs/util.c up to Linus' "no new majors"
  proclamation. Block: were 126 now 122 free, char: were 26 now 19 free

- Updated README from master HTML file

- Removed remnant of multi-mount support in <devfs_mknod>

- Removed unused DEVFS_FL_SHOW_UNREG flag
===============================================================================
Changes for patch v189

- Removed nlink field from struct devfs_inode

- Removed auto-ownership for /dev/pty/* (BSD ptys) and used
  DEVFS_FL_CURRENT_OWNER|DEVFS_FL_NO_PERSISTENCE for /dev/pty/s* (just
  like Unix98 pty slaves) and made /dev/pty/m* rw-rw-rw- access
===============================================================================
Changes for patch v190

- Updated README from master HTML file

- Replaced BKL with global rwsem to protect symlink data (quick and
  dirty hack)
===============================================================================
Changes for patch v191

- Replaced global rwsem for symlink with per-link refcount
===============================================================================
Changes for patch v192

- Removed unnecessary #ifdef CONFIG_DEVFS_FS from arch/i386/kernel/mtrr.c

- Ported to kernel 2.4.10-pre11

- Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode>
===============================================================================
Changes for patch v193

- Went back to global rwsem for symlinks (refcount scheme no good)
===============================================================================
Changes for patch v194

- Fixed overrun in <devfs_link> by removing function (not needed)

- Updated README from master HTML file
===============================================================================
Changes for patch v195

- Fixed buffer underrun in <try_modload>

- Moved down_read() from <search_for_entry_in_dir> to <find_entry>
===============================================================================
Changes for patch v196

- Fixed race in <devfsd_ioctl> when setting event mask
  Thanks to Kari Hurtta <[e-mail]>

- Avoid deadlock in <devfs_follow_link> by using temporary buffer
===============================================================================
Changes for patch v197

- First release of new locking code for devfs core (v1.0)

- Fixed bug in drivers/cdrom/cdrom.c
===============================================================================
Changes for patch v198

- Discard temporary buffer, now use "%s" for dentry names

- Don't generate path in <try_modload>: use fake entry instead

- Use "existing" directory in <_devfs_make_parent_for_leaf>

- Use slab cache rather than fixed buffer for devfsd events
===============================================================================
Changes for patch v199

- Removed obsolete usage of DEVFS_FL_NO_PERSISTENCE

- Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir>

- Fixed locking bug in <devfs_d_revalidate_wait> due to typo

- Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from devfsd
  or children
===============================================================================
Changes for patch v200

- Ported to kernel 2.5.1-pre2
===============================================================================
Changes for patch v201

- Fixed bug in <devfsd_read>: was dereferencing freed pointer
===============================================================================
Changes for patch v202

- Fixed bug in <devfsd_close>: was dereferencing freed pointer

- Added process group check for devfsd privileges
===============================================================================
Changes for patch v203

- Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete>
===============================================================================
Changes for patch v204

- Removed long obsolete rc.devfs

- Return old entry in <devfs_mk_dir> for 2.4.x kernels

- Updated README from master HTML file

- Increment refcount on module in <check_disc_changed>

- Created <devfs_get_handle> and exported <devfs_put>

- Increment refcount on module in <devfs_get_ops>

- Created <devfs_put_ops> and used where needed to fix races

- Added clarifying comments in response to preliminary EMC code review

- Added poisoning to <devfs_put>

- Improved debugging messages

- Fixed unregister bugs in drivers/md/lvm-fs.c
===============================================================================
Changes for patch v205

- Corrected (made useful) debugging message in <unregister>

- Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs>

- Fixed drivers/md/lvm-fs.c to create "lvm" entry

- Added magic number to guard against scribbling drivers

- Only return old entry in <devfs_mk_dir> if a directory

- Defined macros for error and debug messages

- Updated README from master HTML file
===============================================================================
Changes for patch v206

- Added support for multiple Compaq cpqarray controllers

- Fixed (rare, old) race in <devfs_lookup>
===============================================================================
Changes for patch v207

- Fixed deadlock bug in <devfs_d_revalidate_wait>

- Tag VFS deletable in <devfs_mk_symlink> if handle ignored

- Updated README from master HTML file
===============================================================================
Changes for patch v208

- Added KERN_* to remaining messages

- Cleaned up declaration of <stat_read>

- Updated README from master HTML file
===============================================================================
Changes for patch v209

- Updated README from master HTML file

- Removed silently introduced calls to lock_kernel() and
  unlock_kernel() due to recent VFS locking changes. BKL isn't
  required in devfs 

- Changed <devfs_rmdir> to allow later additions if not yet empty

- Added calls to <devfs_register_partitions> in drivers/block/blkpc.c
  <add_partition> and <del_partition>

- Fixed bug in <devfs_alloc_unique_number>: was clearing beyond
  bitfield

- Fixed bitfield data type for <devfs_*alloc_devnum>

- Made major bitfield type and initialiser 64 bit safe
===============================================================================
Changes for patch v210

- Updated fs/devfs/util.c to fix shift warning on 64 bit machines
  Thanks to Anton Blanchard <[e-mail]>

- Updated README from master HTML file
===============================================================================
Changes for patch v211

- Do not put miscellaneous character devices in /dev/misc if they
  specify their own directory (i.e. contain a '/' character)

- Copied macro for error messages from fs/devfs/base.c to
  fs/devfs/util.c and made use of this macro

- Removed 2.4.x compatibility code from fs/devfs/base.c
===============================================================================
Changes for patch v212

- Added BKL to <devfs_open> because drivers still need it
===============================================================================
Changes for patch v213

- Protected <scan_dir_for_removable> and <get_removable_partition>
  from changing directory contents
===============================================================================
Changes for patch v214

- Switched to ISO C structure field initialisers

- Switch to set_current_state() and move before add_wait_queue()

- Updated README from master HTML file

- Fixed devfs entry leak in <devfs_readdir> when *readdir fails
===============================================================================
Changes for patch v215

- Created <devfs_find_and_unregister>

- Switched many functions from <devfs_find_handle> to
  <devfs_find_and_unregister>

- Switched many functions from <devfs_find_handle> to <devfs_get_handle>
===============================================================================
Changes for patch v216

- Switched arch/ia64/sn/io/hcl.c from <devfs_find_handle> to
  <devfs_get_handle>

- Removed deprecated <devfs_find_handle>
===============================================================================
Changes for patch v217

- Exported <devfs_find_and_unregister> and <devfs_only> to modules

- Updated README from master HTML file

- Fixed module unload race in <devfs_open>
===============================================================================
Changes for patch v218

- Removed DEVFS_FL_AUTO_OWNER flag

- Switched lingering structure field initialiser to ISO C

- Added locking when setting/clearing flags

- Documentation fix in fs/devfs/util.c