diff options
| author | Robert Love <rml@novell.com> | 2005-07-12 17:06:03 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-12 20:38:38 -0700 |
| commit | 0eeca28300df110bd6ed54b31193c83b87921443 (patch) | |
| tree | 7db42d8a18d80eca538f5b7d25e0532b8fa38b85 /include/linux/sysctl.h | |
| parent | bd4c625c061c2a38568d0add3478f59172455159 (diff) | |
[PATCH] inotify
inotify is intended to correct the deficiencies of dnotify, particularly
its inability to scale and its terrible user interface:
* dnotify requires the opening of one fd per each directory
that you intend to watch. This quickly results in too many
open files and pins removable media, preventing unmount.
* dnotify is directory-based. You only learn about changes to
directories. Sure, a change to a file in a directory affects
the directory, but you are then forced to keep a cache of
stat structures.
* dnotify's interface to user-space is awful. Signals?
inotify provides a more usable, simple, powerful solution to file change
notification:
* inotify's interface is a system call that returns a fd, not SIGIO.
You get a single fd, which is select()-able.
* inotify has an event that says "the filesystem that the item
you were watching is on was unmounted."
* inotify can watch directories or files.
Inotify is currently used by Beagle (a desktop search infrastructure),
Gamin (a FAM replacement), and other projects.
See Documentation/filesystems/inotify.txt.
Signed-off-by: Robert Love <rml@novell.com>
Cc: John McCutchan <ttb@tentacle.dhs.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/sysctl.h')
| -rw-r--r-- | include/linux/sysctl.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 5b5f434ac9a..ce19a2aa0b2 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -61,7 +61,8 @@ enum CTL_DEV=7, /* Devices */ CTL_BUS=8, /* Busses */ CTL_ABI=9, /* Binary emulation */ - CTL_CPU=10 /* CPU stuff (speed scaling, etc) */ + CTL_CPU=10, /* CPU stuff (speed scaling, etc) */ + CTL_INOTIFY=11 /* Inotify */ }; /* CTL_BUS names: */ @@ -70,6 +71,14 @@ enum CTL_BUS_ISA=1 /* ISA */ }; +/* CTL_INOTIFY names: */ +enum +{ + INOTIFY_MAX_USER_DEVICES=1, /* max number of inotify device instances per user */ + INOTIFY_MAX_USER_WATCHES=2, /* max number of inotify watches per user */ + INOTIFY_MAX_QUEUED_EVENTS=3 /* Max number of queued events per inotify device instance */ +}; + /* CTL_KERN names: */ enum { |