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* Move several *_SUPER_MAGIC symbols to include/linux/magic.h.Jeff Garzik2006-09-2421-78/+62
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* Merge mulgrave-w:git/linux-2.6James Bottomley2006-09-23109-1712/+2692
|\ | | | | | | | | | | | | | | Conflicts: include/linux/blkdev.h Trivial merge to incorporate tag prototypes.
| * Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsaLinus Torvalds2006-09-2312-31/+179
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: (148 commits) [ALSA] intel8x0m - Free irq in suspend [ALSA] Move CONFIG_SND_AC97_POWER_SAVE to pci/Kconfig [ALSA] usb-audio: add mixer control names for the Aureon 5.1 MkII [ALSA] ES1938: remove duplicate field initialization [ALSA] usb-audio: increase number of packets per URB [ALSA] hda-codec - Fix headphone auto-toggle on sigmatel codec [ALSA] hda-intel - A slight cleanup of timeout check in azx_get_response() [ALSA] hda-codec - Fix mic input with STAC92xx codecs [ALSA] mixart: Use SEEK_{SET,CUR,END} instead of hardcoded values [ALSA] gus: Use SEEK_{SET,CUR,END} instead of hardcoded values [ALSA] opl4: Use SEEK_{SET,CUR,END} instead of hardcoded values [ALSA] sound core: Use SEEK_{SET,CUR,END} instead of hardcoded values [ALSA] hda-codec - Support multiple headphone pins [ALSA] hda_intel prefer 24bit instead of 20bit [ALSA] hda-codec - Add vendor ids for Motorola and Conexant [ALSA] hda-codec - Add device id for Motorola si3054-compatible codec [ALSA] Add missing compat ioctls for ALSA control API [ALSA] powermac - Fix Oops when conflicting with aoa driver [ALSA] aoa: add locking to tas codec [ALSA] hda-intel - Fix suspend/resume with MSI ...
| | * [ALSA] ak4xxx - Remove bogus IPGA controlsTakashi Iwai2006-09-231-10/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove IPGA volume controls and merge the IPGA range to ADC volume controls. These two volumes are not really independent but connected simply in different ranges 0-0x7f and 0x80-max. It doesn't make sense to provide two controls. Since both 0x7f and 0x80 specify 0dB, a hack is needed for IPGA range to skip 0x80 (increment one) for such controls. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Add pcm_class attribute to PCM sysfs entryTakashi Iwai2006-09-231-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a new attribute, pcm_class, to each PCM sysfs entry. It's useful to detect what kind of PCM stream is, for example, HAL can check whether it's a modem or not. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Add definition of TLV dB range compoundTakashi Iwai2006-09-231-8/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | Added the definition of TLV dB range compound. It contains one or more dB-range or linear-volume TLV entries with min/max ranges. Used for volume controls with non-linear curves. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Clean up and add TLV support to AK4xxx i2c driverTakashi Iwai2006-09-231-9/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Clean up the code in AK4xxx-ADDA i2c code. - Fix capture gain controls for AK5365 - Changed the static table for DAC/ADC mixer labels to use structs - Implemented TLV entries for each AK codec The volumes in AK4524, AK4528 and AK5365 are corrected with a table to be suitable for dB conversion. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Add the definition of linear volume TLVTakashi Iwai2006-09-231-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | Added the definition of linear volume TLV type. Some DSP chips and codecs (e.g. AK codec) use linear volume control. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Add dB scale information to vxpocket and vx222 driversTakashi Iwai2006-09-231-0/+1
| | | | | | | | | | | | | | | | | | | | | Added the dB scale information to vxpocket and vx222 drivers. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Add dB scale information to ad1848 driverTakashi Iwai2006-09-231-6/+16
| | | | | | | | | | | | | | | | | | | | | Added the dB scale information to ad1848 driver. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Revolution 5.1 - add AK5365 ADC supportJochen Voss2006-09-231-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | Add support for the AK5365 ADC. Signed-off-by: Jochen Voss <voss@seehuhn.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Fix control/status mmap with shared PCM substreamTakashi Iwai2006-09-231-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flag to avoid 32bit-incompatible mmap for control/status records should be outside the pcm substream instance since a substream can be shared among multiple opens. Now it's flagged in pcm_file list that is directly assigned to file->private_data. Also, removed snd_pcm_add_file() and remove_file() functions and substream.files field that are not really used in the code. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] snd-emu10k1: Implement dB gain infomation.James Courtier-Dutton2006-09-231-0/+4
| | | | | | | | | | | | | | | Signed-off-by: James Courtier-Dutton <James@superbug.co.uk> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Remove unused tlv_rw field from struct snd_kcontrolTakashi Iwai2006-09-231-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | Remove unused tlv_rw field from struct snd_kcontrol. The callback is set in tlv.c field, instead. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Control API - more robust TLV implementationJaroslav Kysela2006-09-232-3/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - added callback option - added READ/WRITE/COMMAND flags to access member - added WRITE/COMMAND ioctls - added SNDRV_CTL_EVENT_MASK_TLV for TLV change notifications - added TLV support to ELEM_ADD ioctl Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Add experimental support of aggressive AC97 power-saving modeTakashi Iwai2006-09-231-0/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added CONFIG_SND_AC97_POWER_SAVE kernel config to enable the support of aggressive AC97 power-saving mode. In this mode, the AC97 powerdown register bits are dynamically controlled at each open/close of PCM streams. The mode is activated via power_save option for snd-ac97-codec driver. As default it's off. It can be turned on/off on the fly via sysfs, too. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Deprecate snd_card_free_in_thread()Takashi Iwai2006-09-231-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | Deprecated snd_card_free_in_thread(), replaced with snd_card_free_when_closed(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Unregister device files at disconnectionTakashi Iwai2006-09-232-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Orignally proposed by Sam Revitch <sam.revitch@gmail.com>. Unregister device files at disconnection to avoid the futher accesses. Also, the dev_unregister callback is removed and replaced with the combination of disconnect + free. A new function snd_card_free_when_closed() is introduced, which is used in USB disconnect callback. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Fix disconnection of proc interfaceTakashi Iwai2006-09-231-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add the linked list to each proc entry to enable a single-shot disconnection (unregister) - Deprecate snd_info_unregister(), use snd_info_free_entry() - Removed NULL checks of snd_info_free_entry() Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| | * [ALSA] Control API - TLV implementation for additional information like dB scaleJaroslav Kysela2006-09-233-1/+53
| | | | | | | | | | | | | | | | | | | | | | | | This patch implements a TLV mechanism to transfer an additional information like dB scale to the user space. The types might be extended in future. Acked-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
| * | Merge git://git.linux-nfs.org/pub/linux/nfs-2.6Linus Torvalds2006-09-2311-77/+187
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.linux-nfs.org/pub/linux/nfs-2.6: (74 commits) NFS: unmark NFS direct I/O as experimental NFS: add comments clarifying the use of nfs_post_op_update() NFSv4: rpc_mkpipe creating socket inodes w/out sk buffers NFS: Use SEEK_END instead of hardcoded value NFSv4: When mounting with a port=0 argument, substitute port=2049 NFSv4: Poll more aggressively when handling NFS4ERR_DELAY NFSv4: Handle the condition NFS4ERR_FILE_OPEN NFSv4: Retry lease recovery if it failed during a synchronous operation. NFS: Don't invalidate the symlink we just stuffed into the cache NFS: Make read() return an ESTALE if the file has been deleted NFSv4: It's perfectly legal for clp to be NULL here.... NFS: nfs_lookup - don't hash dentry when optimising away the lookup SUNRPC: Fix Oops in pmap_getport_done SUNRPC: Add refcounting to the struct rpc_xprt SUNRPC: Clean up soft task error handling SUNRPC: Handle ENETUNREACH, EHOSTUNREACH and EHOSTDOWN socket errors SUNRPC: rpc_delay() should not clobber the rpc_task->tk_status Fix a referral error Oops NFS: NFS_ROOT should use the new rpc_create API NFS: Fix up compiler warnings on 64-bit platforms in client.c ... Manually resolved conflict in net/sunrpc/xprtsock.c
| | * | SUNRPC: Add refcounting to the struct rpc_xprtTrond Myklebust2006-09-221-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In a subsequent patch, this will allow the portmapper to take a reference to the rpc_xprt for which it is updating the port number, fixing an Oops. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Make rpc_mkpipe() take the parent dentry as an argumentTrond Myklebust2006-09-221-1/+1
| | | | | | | | | | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFSv4: Fix a use-after-free issue with the nfs server.Trond Myklebust2006-09-221-0/+1
| | | | | | | | | | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | Add a real API for dealing with blk_congestion_wait()Trond Myklebust2006-09-222-0/+2
| | | | | | | | | | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Use cached page as buffer for NFS symlink requestsChuck Lever2006-09-221-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have a copy of the symlink path in the page cache, we can pass a struct page down to the XDR routines instead of a string buffer. Test plan: Connectathon, all NFS versions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Fix double d_drop in nfs_instantiate() error pathChuck Lever2006-09-221-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the LOOKUP or GETATTR in nfs_instantiate fail, nfs_instantiate will do a d_drop before returning. But some callers already do a d_drop in the case of an error return. Make certain we do only one d_drop in all error paths. This issue was introduced because over time, the symlink proc API diverged slightly from the create/mkdir/mknod proc API. To prevent other coding mistakes of this type, change the symlink proc API to be more like create/mkdir/mknod and move the nfs_instantiate call into the symlink proc routines so it is used in exactly the same way for create, mkdir, mknod, and symlink. Test plan: Connectathon, all versions of NFS. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Eliminate xprt_create_proto and rpc_create_clientChuck Lever2006-09-222-8/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The two function call API for creating a new RPC client is now obsolete. Remove it. Also, remove an unnecessary check to see whether the caller is capable of using privileged network services. The kernel RPC client always uses a privileged ephemeral port by default; callers are responsible for checking the authority of users to make use of any RPC service, or for specifying that a nonprivileged port is acceptable. Test plan: Repeated runs of Connectathon locking suite. Check network trace to ensure correctness of NLM requests and replies. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: use sockaddr + size when creating remote transport endpointsChuck Lever2006-09-222-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prepare for more generic transport endpoint handling needed by transports that might use different forms of addressing, such as IPv6. Introduce a single function call to replace the two-call xprt_create_proto/rpc_create_client API. Define a new rpc_create_args structure that allows callers to pass in remote endpoint addresses of varying length. Test-plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Clean-up after previous patches.Chuck Lever2006-09-222-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove some unused macros related to accessing an RPC peer address Test plan: Compile kernel with CONFIG_NFS option enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Use "sockaddr_storage" for storing RPC client's remote peer addressChuck Lever2006-09-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IPv6 addresses are big (128 bytes). Now that no RPC client consumers treat the addr field in rpc_xprt structs as an opaque, and access it only via the API calls, we can safely widen the field in the rpc_xprt struct to accomodate larger addresses. Test plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Create API for displaying remote peer addressChuck Lever2006-09-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide an API for formatting the remote peer address for printing without exposing its internal structure. The address could be dynamic, so we support a function call to get the address rather than reading it straight out of a structure. Test-plan: Destructive testing (unplugging the network temporarily). Probably need to rig a server where certain services aren't running, or that returns an error for some typical operation. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: add xprt switch API for printing formatted remote peer addressesChuck Lever2006-09-221-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new method to the transport switch API to provide a way to convert the opaque contents of xprt->addr to a human-readable string. Test plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: remove extraneous header inclusionsChuck Lever2006-09-221-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | include/linux/sunrpc/clnt.h already includes include/linux/sunrpc/xprt.h. We can remove xprt.h from source files that already include clnt.h. Likewise include/linux/sunrpc/timer.h. Test plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: create API for getting remote peer addressChuck Lever2006-09-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide an API for retrieving the remote peer address without allowing direct access to the rpc_xprt struct. Test-plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Introduce transport switch callout for pluggable rpcbindChuck Lever2006-09-222-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a clean transport switch API for plugging in different types of rpcbind mechanisms. For instance, rpcbind can cleanly replace the existing portmapper client, or a transport can choose to implement RPC binding any way it likes. Test plan: Destructive testing (unplugging the network temporarily). Connectathon with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked. Probably need to rig a server where certain services aren't running, or that returns an error for some typical operation. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Support for RPC child tasks no longer neededChuck Lever2006-09-221-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The previous patches removed the last user of RPC child tasks, so we can remove support for child tasks from net/sunrpc/sched.c now. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Make RPC portmapper use per-transport storageChuck Lever2006-09-222-20/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move connection and bind state that was maintained in the rpc_clnt structure to the rpc_xprt structure. This will allow the creation of a clean API for plugging in different types of bind mechanisms. This brings improvements such as the elimination of a single spin lock to control serialization for all in-kernel RPC binding. A set of per-xprt bitops is used to serialize tasks during RPC binding, just like it now works for making RPC transport connections. Test-plan: Destructive testing (unplugging the network temporarily). Connectathon with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked. Probably need to rig a server where certain services aren't running, or that returns an error for some typical operation. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | SUNRPC: Create a helper to tell whether a transport is boundChuck Lever2006-09-221-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hide the contents and format of xprt->addr by eliminating direct uses of the xprt->addr.sin_port field. This change is required to support alternate RPC host address formats (eg IPv6). Test-plan: Destructive testing (unplugging the network temporarily). Repeated runs of Connectathon locking suite with UDP and TCP. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Share NFS superblocks per-protocol per-server per-FSIDDavid Howells2006-09-221-12/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The attached patch makes NFS share superblocks between mounts from the same server and FSID over the same protocol. It does this by creating each superblock with a false root and returning the real root dentry in the vfsmount presented by get_sb(). The root dentry set starts off as an anonymous dentry if we don't already have the dentry for its inode, otherwise it simply returns the dentry we already have. We may thus end up with several trees of dentries in the superblock, and if at some later point one of anonymous tree roots is discovered by normal filesystem activity to be located in another tree within the superblock, the anonymous root is named and materialises attached to the second tree at the appropriate point. Why do it this way? Why not pass an extra argument to the mount() syscall to indicate the subpath and then pathwalk from the server root to the desired directory? You can't guarantee this will work for two reasons: (1) The root and intervening nodes may not be accessible to the client. With NFS2 and NFS3, for instance, mountd is called on the server to get the filehandle for the tip of a path. mountd won't give us handles for anything we don't have permission to access, and so we can't set up NFS inodes for such nodes, and so can't easily set up dentries (we'd have to have ghost inodes or something). With this patch we don't actually create dentries until we get handles from the server that we can use to set up their inodes, and we don't actually bind them into the tree until we know for sure where they go. (2) Inaccessible symbolic links. If we're asked to mount two exports from the server, eg: mount warthog:/warthog/aaa/xxx /mmm mount warthog:/warthog/bbb/yyy /nnn We may not be able to access anything nearer the root than xxx and yyy, but we may find out later that /mmm/www/yyy, say, is actually the same directory as the one mounted on /nnn. What we might then find out, for example, is that /warthog/bbb was actually a symbolic link to /warthog/aaa/xxx/www, but we can't actually determine that by talking to the server until /warthog is made available by NFS. This would lead to having constructed an errneous dentry tree which we can't easily fix. We can end up with a dentry marked as a directory when it should actually be a symlink, or we could end up with an apparently hardlinked directory. With this patch we need not make assumptions about the type of a dentry for which we can't retrieve information, nor need we assume we know its place in the grand scheme of things until we actually see that place. This patch reduces the possibility of aliasing in the inode and page caches for inodes that may be accessed by more than one NFS export. It also reduces the number of superblocks required for NFS where there are many NFS exports being used from a server (home directory server + autofs for example). This in turn makes it simpler to do local caching of network filesystems, as it can then be guaranteed that there won't be links from multiple inodes in separate superblocks to the same cache file. Obviously, cache aliasing between different levels of NFS protocol could still be a problem, but at least that gives us another key to use when indexing the cache. This patch makes the following changes: (1) The server record construction/destruction has been abstracted out into its own set of functions to make things easier to get right. These have been moved into fs/nfs/client.c. All the code in fs/nfs/client.c has to do with the management of connections to servers, and doesn't touch superblocks in any way; the remaining code in fs/nfs/super.c has to do with VFS superblock management. (2) The sequence of events undertaken by NFS mount is now reordered: (a) A volume representation (struct nfs_server) is allocated. (b) A server representation (struct nfs_client) is acquired. This may be allocated or shared, and is keyed on server address, port and NFS version. (c) If allocated, the client representation is initialised. The state member variable of nfs_client is used to prevent a race during initialisation from two mounts. (d) For NFS4 a simple pathwalk is performed, walking from FH to FH to find the root filehandle for the mount (fs/nfs/getroot.c). For NFS2/3 we are given the root FH in advance. (e) The volume FSID is probed for on the root FH. (f) The volume representation is initialised from the FSINFO record retrieved on the root FH. (g) sget() is called to acquire a superblock. This may be allocated or shared, keyed on client pointer and FSID. (h) If allocated, the superblock is initialised. (i) If the superblock is shared, then the new nfs_server record is discarded. (j) The root dentry for this mount is looked up from the root FH. (k) The root dentry for this mount is assigned to the vfsmount. (3) nfs_readdir_lookup() creates dentries for each of the entries readdir() returns; this function now attaches disconnected trees from alternate roots that happen to be discovered attached to a directory being read (in the same way nfs_lookup() is made to do for lookup ops). The new d_materialise_unique() function is now used to do this, thus permitting the whole thing to be done under one set of locks, and thus avoiding any race between mount and lookup operations on the same directory. (4) The client management code uses a new debug facility: NFSDBG_CLIENT which is set by echoing 1024 to /proc/net/sunrpc/nfs_debug. (5) Clone mounts are now called xdev mounts. (6) Use the dentry passed to the statfs() op as the handle for retrieving fs statistics rather than the root dentry of the superblock (which is now a dummy). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Eliminate client_sys in favour of cl_rpcclientDavid Howells2006-09-221-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Eliminate nfs_server::client_sys in favour of nfs_client::cl_rpcclient as we only really need one per server that we're talking to since it doesn't have any security on it. The retransmission management variables are also moved to the common struct as they're required to set up the cl_rpcclient connection. The NFS2/3 client and client_acl connections are thenceforth derived by cloning the cl_rpcclient connection and post-applying the authorisation flavour. The code for setting up the initial common connection has been moved to client.c as nfs_create_rpc_client(). All the NFS program definition tables are also moved there as that's where they're now required rather than super.c. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Move rpc_ops from nfs_server to nfs_clientDavid Howells2006-09-222-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the rpc_ops from the nfs_server struct to the nfs_client struct as they're common to all server records of a particular NFS protocol version. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Maintain a common server record for NFS2/3 as well as for NFS4David Howells2006-09-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Maintain a common server record for NFS2/3 as well as for NFS4 so that common stuff can be moved there from struct nfs_server. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Add extra const qualifiersDavid Howells2006-09-222-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add some extra const qualifiers into NFS. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Generalise the nfs_client structureDavid Howells2006-09-222-0/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generalise the nfs_client structure by: (1) Moving nfs_client to a more general place (nfs_fs_sb.h). (2) Renaming its maintenance routines to be non-NFS4 specific. (3) Move those maintenance routines to a new non-NFS4 specific file (client.c) and move the declarations to internal.h. (4) Make nfs_find/get_client() take a full sockaddr_in to include the port number (will be required for NFS2/3). (5) Make nfs_find/get_client() take the NFS protocol version (again will be required to differentiate NFS2, 3 & 4 client records). Also: (6) Make nfs_client construction proceed akin to inodes, marking them as under construction and providing a function to indicate completion. (7) Make nfs_get_client() wait interruptibly if it finds a client that it can share, but that client is currently being constructed. (8) Make nfs4_create_client() use (6) and (7) instead of locking cl_sem. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Add a server capabilities NFS RPC opDavid Howells2006-09-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a set_capabilities NFS RPC op so that the server capabilities can be set. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Add a lookupfh NFS RPC opDavid Howells2006-09-221-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a lookup filehandle NFS RPC op so that a file handle can be looked up without requiring dentries and inodes and other VFS stuff when doing an NFS4 pathwalk during mounting. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Return an error when starting the idmapping pipeDavid Howells2006-09-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Return an error when starting the idmapping pipe so that we can detect it failing. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Rename nfs_server::nfs4_stateDavid Howells2006-09-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename nfs_server::nfs4_state to nfs_client as it will be used to represent the client state for NFS2 and NFS3 also. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| | * | NFS: Rename struct nfs4_client to struct nfs_clientDavid Howells2006-09-222-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename struct nfs4_client to struct nfs_client so that it can become the basis for a general client record for NFS2 and NFS3 in addition to NFS4. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 00:10:38 +0000