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linux-largefile-appending-fix-20020107

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appending >2gb bug, pointed to hartmut by lindsay todd
This commit is contained in:
Hartmut Reuter 2003-01-07 23:29:41 +00:00 committed by Derrick Brashear
parent e0a78652da
commit 7875999a4b
1 changed files with 11 additions and 5 deletions
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16
src/afs/LINUX/osi_vnodeops.c
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@ -150,6 +150,7 @@ static ssize_t afs_linux_write(struct file *fp, const char *buf, size_t count,
struct vcache *vcp = ITOAFS(fp->f_dentry->d_inode);
struct vrequest treq;
cred_t *credp = crref();
afs_offs_t toffs;
AFS_GLOCK();
@ -171,13 +172,16 @@ static ssize_t afs_linux_write(struct file *fp, const char *buf, size_t count,
code = -code;
else {
#ifdef AFS_64BIT_CLIENT
if (*offp + count > afs_vmMappingEnd) {
toffs = *offp;
if (fp->f_flags & O_APPEND)
toffs += vcp->m.Length;
if (toffs + count > afs_vmMappingEnd) {
uio_t tuio;
struct iovec iov;
afs_size_t oldOffset = *offp;
afs_int32 xfered = 0;
if (*offp < afs_vmMappingEnd) {
if (toffs < afs_vmMappingEnd) {
/* special case of a buffer crossing the VM mapping end */
afs_int32 tcount = afs_vmMappingEnd - *offp;
count -= tcount;
@ -188,8 +192,9 @@ static ssize_t afs_linux_write(struct file *fp, const char *buf, size_t count,
goto done;
}
xfered = tcount;
toffs += tcount;
}
setup_uio(&tuio, &iov, buf + xfered, (afs_offs_t) *offp, count,
setup_uio(&tuio, &iov, buf + xfered, (afs_offs_t) toffs, count,
UIO_WRITE, AFS_UIOSYS);
code = afs_write(vcp, &tuio, fp->f_flags, credp, 0);
xfered += count - tuio.uio_resid;
@ -209,11 +214,12 @@ static ssize_t afs_linux_write(struct file *fp, const char *buf, size_t count,
}
code = xfered;
*offp += count;
toffs += count;
ObtainWriteLock(&vcp->lock,400);
vcp->m.Date = osi_Time(); /* Set file date (for ranlib) */
/* extend file */
if (*offp > vcp->m.Length) {
vcp->m.Length = *offp;
if (!(fp->f_flags & O_APPEND) && toffs > vcp->m.Length) {
vcp->m.Length = toffs;
}
ReleaseWriteLock(&vcp->lock);
}