#include <linux/coda_psdev.h>
#include <linux/coda_fs_i.h>
#include <linux/coda_cache.h>
-#include <linux/coda_proc.h>
-#define upc_alloc() kmalloc(sizeof(struct upc_req), GFP_KERNEL)
-#define upc_free(r) kfree(r)
+#include "coda_int.h"
-static int coda_upcall(struct coda_sb_info *mntinfo, int inSize, int *outSize,
+static int coda_upcall(struct venus_comm *vc, int inSize, int *outSize,
union inputArgs *buffer);
static void *alloc_upcall(int opcode, int size)
insize = SIZE(root);
UPARG(CODA_ROOT);
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
-
- if (error) {
- printk("coda_get_rootfid: error %d\n", error);
- } else {
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error)
*fidp = outp->coda_root.VFid;
- }
CODA_FREE(inp, insize);
return error;
UPARG(CODA_GETATTR);
inp->coda_getattr.VFid = *fid;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
-
- *attr = outp->coda_getattr.attr;
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error)
+ *attr = outp->coda_getattr.attr;
CODA_FREE(inp, insize);
return error;
inp->coda_setattr.VFid = *fid;
inp->coda_setattr.attr = *vattr;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
memcpy((char *)(inp) + offset, name, length);
*((char *)inp + offset + length) = '\0';
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
-
- *resfid = outp->coda_lookup.VFid;
- *type = outp->coda_lookup.vtype;
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error) {
+ *resfid = outp->coda_lookup.VFid;
+ *type = outp->coda_lookup.vtype;
+ }
CODA_FREE(inp, insize);
return error;
inp->coda_store.VFid = *fid;
inp->coda_store.flags = flags;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
inp->coda_release.VFid = *fid;
inp->coda_release.flags = flags;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
inp->coda_close.VFid = *fid;
inp->coda_close.flags = flags;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
insize = SIZE(open_by_fd);
UPARG(CODA_OPEN_BY_FD);
- inp->coda_open.VFid = *fid;
- inp->coda_open.flags = flags;
+ inp->coda_open_by_fd.VFid = *fid;
+ inp->coda_open_by_fd.flags = flags;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
-
- *fh = outp->coda_open_by_fd.fh;
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error)
+ *fh = outp->coda_open_by_fd.fh;
CODA_FREE(inp, insize);
return error;
/* Venus must get null terminated string */
memcpy((char *)(inp) + offset, name, length);
*((char *)inp + offset + length) = '\0';
-
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
- *attrs = outp->coda_mkdir.attr;
- *newfid = outp->coda_mkdir.VFid;
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error) {
+ *attrs = outp->coda_mkdir.attr;
+ *newfid = outp->coda_mkdir.VFid;
+ }
CODA_FREE(inp, insize);
return error;
memcpy((char *)(inp) + offset, new_name, new_length);
*((char *)inp + offset + new_length) = '\0';
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
/* Venus must get null terminated string */
memcpy((char *)(inp) + offset, name, length);
*((char *)inp + offset + length) = '\0';
-
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
- *attrs = outp->coda_create.attr;
- *newfid = outp->coda_create.VFid;
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error) {
+ *attrs = outp->coda_create.attr;
+ *newfid = outp->coda_create.VFid;
+ }
CODA_FREE(inp, insize);
return error;
inp->coda_rmdir.name = offset;
memcpy((char *)(inp) + offset, name, length);
*((char *)inp + offset + length) = '\0';
-
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
inp->coda_remove.name = offset;
memcpy((char *)(inp) + offset, name, length);
*((char *)inp + offset + length) = '\0';
-
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
UPARG(CODA_READLINK);
inp->coda_readlink.VFid = *fid;
-
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
-
- if (! error) {
- retlen = outp->coda_readlink.count;
+
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
+ if (!error) {
+ retlen = outp->coda_readlink.count;
if ( retlen > *length )
- retlen = *length;
+ retlen = *length;
*length = retlen;
result = (char *)outp + (long)outp->coda_readlink.data;
memcpy(buffer, result, retlen);
*(buffer + retlen) = '\0';
}
-
+
CODA_FREE(inp, insize);
return error;
}
/* make sure strings are null terminated */
memcpy((char *)(inp) + offset, name, len);
*((char *)inp + offset + len) = '\0';
-
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
memcpy((char *)(inp) + offset, name, len);
*((char *)inp + offset + len) = '\0';
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
insize=SIZE(fsync);
UPARG(CODA_FSYNC);
- inp->coda_fsync.VFid = *fid;
- error = coda_upcall(coda_sbp(sb), sizeof(union inputArgs),
- &outsize, inp);
+ inp->coda_fsync.VFid = *fid;
+ error = coda_upcall(coda_vcp(sb), sizeof(union inputArgs),
+ &outsize, inp);
CODA_FREE(inp, insize);
return error;
inp->coda_access.VFid = *fid;
inp->coda_access.flags = mask;
- error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
goto exit;
}
- error = coda_upcall(coda_sbp(sb), SIZE(ioctl) + data->vi.in_size,
- &outsize, inp);
-
+ error = coda_upcall(coda_vcp(sb), SIZE(ioctl) + data->vi.in_size,
+ &outsize, inp);
+
if (error) {
printk("coda_pioctl: Venus returns: %d for %s\n",
error, coda_f2s(fid));
insize = max_t(unsigned int, INSIZE(statfs), OUTSIZE(statfs));
UPARG(CODA_STATFS);
- error = coda_upcall(coda_sbp(dentry->d_sb), insize, &outsize, inp);
-
- if (!error) {
+ error = coda_upcall(coda_vcp(dentry->d_sb), insize, &outsize, inp);
+ if (!error) {
sfs->f_blocks = outp->coda_statfs.stat.f_blocks;
sfs->f_bfree = outp->coda_statfs.stat.f_bfree;
sfs->f_bavail = outp->coda_statfs.stat.f_bavail;
sfs->f_files = outp->coda_statfs.stat.f_files;
sfs->f_ffree = outp->coda_statfs.stat.f_ffree;
- } else {
- printk("coda_statfs: Venus returns: %d\n", error);
}
CODA_FREE(inp, insize);
/*
* coda_upcall and coda_downcall routines.
- *
*/
+static void block_signals(sigset_t *old)
+{
+ spin_lock_irq(¤t->sighand->siglock);
+ *old = current->blocked;
+
+ sigfillset(¤t->blocked);
+ sigdelset(¤t->blocked, SIGKILL);
+ sigdelset(¤t->blocked, SIGSTOP);
+ sigdelset(¤t->blocked, SIGINT);
+
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+}
+
+static void unblock_signals(sigset_t *old)
+{
+ spin_lock_irq(¤t->sighand->siglock);
+ current->blocked = *old;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+}
+
+/* Don't allow signals to interrupt the following upcalls before venus
+ * has seen them,
+ * - CODA_CLOSE or CODA_RELEASE upcall (to avoid reference count problems)
+ * - CODA_STORE (to avoid data loss)
+ */
+#define CODA_INTERRUPTIBLE(r) (!coda_hard && \
+ (((r)->uc_opcode != CODA_CLOSE && \
+ (r)->uc_opcode != CODA_STORE && \
+ (r)->uc_opcode != CODA_RELEASE) || \
+ (r)->uc_flags & REQ_READ))
-static inline void coda_waitfor_upcall(struct upc_req *vmp,
- struct venus_comm *vcommp)
+static inline void coda_waitfor_upcall(struct upc_req *req)
{
DECLARE_WAITQUEUE(wait, current);
+ unsigned long timeout = jiffies + coda_timeout * HZ;
+ sigset_t old;
+ int blocked;
- vmp->uc_posttime = jiffies;
+ block_signals(&old);
+ blocked = 1;
- add_wait_queue(&vmp->uc_sleep, &wait);
+ add_wait_queue(&req->uc_sleep, &wait);
for (;;) {
- if ( !coda_hard && vmp->uc_opcode != CODA_CLOSE )
+ if (CODA_INTERRUPTIBLE(req))
set_current_state(TASK_INTERRUPTIBLE);
else
set_current_state(TASK_UNINTERRUPTIBLE);
- /* venus died */
- if ( !vcommp->vc_inuse )
- break;
-
/* got a reply */
- if ( vmp->uc_flags & ( REQ_WRITE | REQ_ABORT ) )
+ if (req->uc_flags & (REQ_WRITE | REQ_ABORT))
break;
- if ( !coda_hard && vmp->uc_opcode != CODA_CLOSE && signal_pending(current) ) {
- /* if this process really wants to die, let it go */
- if ( sigismember(&(current->pending.signal), SIGKILL) ||
- sigismember(&(current->pending.signal), SIGINT) )
- break;
- /* signal is present: after timeout always return
- really smart idea, probably useless ... */
- if ( jiffies - vmp->uc_posttime > coda_timeout * HZ )
- break;
+ if (blocked && time_after(jiffies, timeout) &&
+ CODA_INTERRUPTIBLE(req))
+ {
+ unblock_signals(&old);
+ blocked = 0;
+ }
+
+ if (signal_pending(current)) {
+ list_del(&req->uc_chain);
+ break;
}
- schedule();
+
+ if (blocked)
+ schedule_timeout(HZ);
+ else
+ schedule();
}
- remove_wait_queue(&vmp->uc_sleep, &wait);
- set_current_state(TASK_RUNNING);
+ if (blocked)
+ unblock_signals(&old);
- return;
+ remove_wait_queue(&req->uc_sleep, &wait);
+ set_current_state(TASK_RUNNING);
}
-/*
- * coda_upcall will return an error in the case of
+/*
+ * coda_upcall will return an error in the case of
* failed communication with Venus _or_ will peek at Venus
* reply and return Venus' error.
*
* As venus has 2 types of errors, normal errors (positive) and internal
* errors (negative), normal errors are negated, while internal errors
* are all mapped to -EINTR, while showing a nice warning message. (jh)
- *
*/
-static int coda_upcall(struct coda_sb_info *sbi,
- int inSize, int *outSize,
- union inputArgs *buffer)
+static int coda_upcall(struct venus_comm *vcp,
+ int inSize, int *outSize,
+ union inputArgs *buffer)
{
- struct venus_comm *vcommp;
union outputArgs *out;
- struct upc_req *req;
+ union inputArgs *sig_inputArgs;
+ struct upc_req *req, *sig_req;
int error = 0;
- vcommp = sbi->sbi_vcomm;
- if ( !vcommp->vc_inuse ) {
- printk("No pseudo device in upcall comms at %p\n", vcommp);
- return -ENXIO;
+ if (!vcp->vc_inuse) {
+ printk(KERN_NOTICE "coda: Venus dead, not sending upcall\n");
+ return -ENXIO;
}
/* Format the request message. */
- req = upc_alloc();
- if (!req) {
- printk("Failed to allocate upc_req structure\n");
+ req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
+ if (!req)
return -ENOMEM;
- }
+
req->uc_data = (void *)buffer;
req->uc_flags = 0;
req->uc_inSize = inSize;
req->uc_outSize = *outSize ? *outSize : inSize;
req->uc_opcode = ((union inputArgs *)buffer)->ih.opcode;
- req->uc_unique = ++vcommp->vc_seq;
+ req->uc_unique = ++vcp->vc_seq;
init_waitqueue_head(&req->uc_sleep);
-
+
/* Fill in the common input args. */
((union inputArgs *)buffer)->ih.unique = req->uc_unique;
/* Append msg to pending queue and poke Venus. */
- list_add_tail(&(req->uc_chain), &vcommp->vc_pending);
-
- wake_up_interruptible(&vcommp->vc_waitq);
+ list_add_tail(&req->uc_chain, &vcp->vc_pending);
+
+ wake_up_interruptible(&vcp->vc_waitq);
/* We can be interrupted while we wait for Venus to process
* our request. If the interrupt occurs before Venus has read
* the request, we dequeue and return. If it occurs after the
* ENODEV. */
/* Go to sleep. Wake up on signals only after the timeout. */
- coda_waitfor_upcall(req, vcommp);
+ coda_waitfor_upcall(req);
- if (vcommp->vc_inuse) { /* i.e. Venus is still alive */
- /* Op went through, interrupt or not... */
- if (req->uc_flags & REQ_WRITE) {
+ /* Op went through, interrupt or not... */
+ if (req->uc_flags & REQ_WRITE) {
out = (union outputArgs *)req->uc_data;
/* here we map positive Venus errors to kernel errors */
error = -out->oh.result;
*outSize = req->uc_outSize;
goto exit;
- }
- if ( !(req->uc_flags & REQ_READ) && signal_pending(current)) {
- /* Interrupted before venus read it. */
- list_del(&(req->uc_chain));
- /* perhaps the best way to convince the app to
- give up? */
- error = -EINTR;
+ }
+
+ error = -EINTR;
+ if ((req->uc_flags & REQ_ABORT) || !signal_pending(current)) {
+ printk(KERN_WARNING "coda: Unexpected interruption.\n");
goto exit;
- }
- if ( (req->uc_flags & REQ_READ) && signal_pending(current) ) {
- /* interrupted after Venus did its read, send signal */
- union inputArgs *sig_inputArgs;
- struct upc_req *sig_req;
-
- list_del(&(req->uc_chain));
- error = -ENOMEM;
- sig_req = upc_alloc();
- if (!sig_req) goto exit;
-
- CODA_ALLOC((sig_req->uc_data), char *, sizeof(struct coda_in_hdr));
- if (!sig_req->uc_data) {
- upc_free(sig_req);
- goto exit;
- }
-
- error = -EINTR;
- sig_inputArgs = (union inputArgs *)sig_req->uc_data;
- sig_inputArgs->ih.opcode = CODA_SIGNAL;
- sig_inputArgs->ih.unique = req->uc_unique;
-
- sig_req->uc_flags = REQ_ASYNC;
- sig_req->uc_opcode = sig_inputArgs->ih.opcode;
- sig_req->uc_unique = sig_inputArgs->ih.unique;
- sig_req->uc_inSize = sizeof(struct coda_in_hdr);
- sig_req->uc_outSize = sizeof(struct coda_in_hdr);
-
- /* insert at head of queue! */
- list_add(&(sig_req->uc_chain), &vcommp->vc_pending);
- wake_up_interruptible(&vcommp->vc_waitq);
- } else {
- printk("Coda: Strange interruption..\n");
- error = -EINTR;
- }
- } else { /* If venus died i.e. !VC_OPEN(vcommp) */
- printk("coda_upcall: Venus dead on (op,un) (%d.%d) flags %d\n",
- req->uc_opcode, req->uc_unique, req->uc_flags);
- error = -ENODEV;
}
- exit:
- upc_free(req);
+ /* Interrupted before venus read it. */
+ if (!(req->uc_flags & REQ_READ))
+ goto exit;
+
+ /* Venus saw the upcall, make sure we can send interrupt signal */
+ if (!vcp->vc_inuse) {
+ printk(KERN_INFO "coda: Venus dead, not sending signal.\n");
+ goto exit;
+ }
+
+ error = -ENOMEM;
+ sig_req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
+ if (!sig_req) goto exit;
+
+ CODA_ALLOC((sig_req->uc_data), char *, sizeof(struct coda_in_hdr));
+ if (!sig_req->uc_data) {
+ kfree(sig_req);
+ goto exit;
+ }
+
+ error = -EINTR;
+ sig_inputArgs = (union inputArgs *)sig_req->uc_data;
+ sig_inputArgs->ih.opcode = CODA_SIGNAL;
+ sig_inputArgs->ih.unique = req->uc_unique;
+
+ sig_req->uc_flags = REQ_ASYNC;
+ sig_req->uc_opcode = sig_inputArgs->ih.opcode;
+ sig_req->uc_unique = sig_inputArgs->ih.unique;
+ sig_req->uc_inSize = sizeof(struct coda_in_hdr);
+ sig_req->uc_outSize = sizeof(struct coda_in_hdr);
+
+ /* insert at head of queue! */
+ list_add(&(sig_req->uc_chain), &vcp->vc_pending);
+ wake_up_interruptible(&vcp->vc_waitq);
+
+exit:
+ kfree(req);
return error;
}
int coda_downcall(int opcode, union outputArgs * out, struct super_block *sb)
{
+ struct inode *inode = NULL;
+ struct CodaFid *fid, *newfid;
+
/* Handle invalidation requests. */
- if ( !sb || !sb->s_root || !sb->s_root->d_inode)
- return 0;
-
- switch (opcode) {
-
- case CODA_FLUSH : {
- coda_cache_clear_all(sb);
- shrink_dcache_sb(sb);
- coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
- return(0);
- }
-
- case CODA_PURGEUSER : {
- coda_cache_clear_all(sb);
- return(0);
- }
-
- case CODA_ZAPDIR : {
- struct inode *inode;
- struct CodaFid *fid = &out->coda_zapdir.CodaFid;
-
- inode = coda_fid_to_inode(fid, sb);
- if (inode) {
- coda_flag_inode_children(inode, C_PURGE);
- coda_flag_inode(inode, C_VATTR);
- iput(inode);
- }
-
- return(0);
- }
-
- case CODA_ZAPFILE : {
- struct inode *inode;
- struct CodaFid *fid = &out->coda_zapfile.CodaFid;
- inode = coda_fid_to_inode(fid, sb);
- if ( inode ) {
- coda_flag_inode(inode, C_VATTR);
- iput(inode);
- }
- return 0;
- }
-
- case CODA_PURGEFID : {
- struct inode *inode;
- struct CodaFid *fid = &out->coda_purgefid.CodaFid;
- inode = coda_fid_to_inode(fid, sb);
- if ( inode ) {
+ if ( !sb || !sb->s_root)
+ return 0;
+
+ switch (opcode) {
+ case CODA_FLUSH:
+ coda_cache_clear_all(sb);
+ shrink_dcache_sb(sb);
+ if (sb->s_root->d_inode)
+ coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
+ break;
+
+ case CODA_PURGEUSER:
+ coda_cache_clear_all(sb);
+ break;
+
+ case CODA_ZAPDIR:
+ fid = &out->coda_zapdir.CodaFid;
+ inode = coda_fid_to_inode(fid, sb);
+ if (inode) {
+ coda_flag_inode_children(inode, C_PURGE);
+ coda_flag_inode(inode, C_VATTR);
+ }
+ break;
+
+ case CODA_ZAPFILE:
+ fid = &out->coda_zapfile.CodaFid;
+ inode = coda_fid_to_inode(fid, sb);
+ if (inode)
+ coda_flag_inode(inode, C_VATTR);
+ break;
+
+ case CODA_PURGEFID:
+ fid = &out->coda_purgefid.CodaFid;
+ inode = coda_fid_to_inode(fid, sb);
+ if (inode) {
coda_flag_inode_children(inode, C_PURGE);
/* catch the dentries later if some are still busy */
coda_flag_inode(inode, C_PURGE);
d_prune_aliases(inode);
- iput(inode);
- }
- return 0;
- }
-
- case CODA_REPLACE : {
- struct inode *inode;
- struct CodaFid *oldfid = &out->coda_replace.OldFid;
- struct CodaFid *newfid = &out->coda_replace.NewFid;
- inode = coda_fid_to_inode(oldfid, sb);
- if ( inode ) {
- coda_replace_fid(inode, oldfid, newfid);
- iput(inode);
- }
- return 0;
- }
- }
- return 0;
+ }
+ break;
+
+ case CODA_REPLACE:
+ fid = &out->coda_replace.OldFid;
+ newfid = &out->coda_replace.NewFid;
+ inode = coda_fid_to_inode(fid, sb);
+ if (inode)
+ coda_replace_fid(inode, fid, newfid);
+ break;
+ }
+
+ if (inode)
+ iput(inode);
+
+ return 0;
}
git.openpandora.org / pandora-kernel.git / blobdiff