[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH 03/15] mini-os: make offset a common struct file member for all types
Juergen Gross, le jeu. 06 janv. 2022 12:57:29 +0100, a ecrit: > Currently 4 file types have an offset member in their private struct > file part. Make offset a common struct member shared by all file types. > > Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx> > --- > blkfront.c | 5 ++--- > include/lib.h | 5 +---- > lib/sys.c | 14 +++++--------- > tpm_tis.c | 11 +++++------ > tpmfront.c | 11 +++++------ > 5 files changed, 18 insertions(+), 28 deletions(-) > > diff --git a/blkfront.c b/blkfront.c > index 7c8eb74..8137106 100644 > --- a/blkfront.c > +++ b/blkfront.c > @@ -563,14 +563,13 @@ int blkfront_open(struct blkfront_dev *dev) > dev->fd = alloc_fd(FTYPE_BLK); > printk("blk_open(%s) -> %d\n", dev->nodename, dev->fd); > files[dev->fd].blk.dev = dev; > - files[dev->fd].blk.offset = 0; > return dev->fd; > } > > int blkfront_posix_rwop(int fd, uint8_t* buf, size_t count, int write) > { > struct blkfront_dev* dev = files[fd].blk.dev; > - off_t offset = files[fd].blk.offset; > + off_t offset = files[fd].offset; > struct blkfront_aiocb aiocb; > unsigned long long disksize = dev->info.sectors * dev->info.sector_size; > unsigned int blocksize = dev->info.sector_size; > @@ -712,7 +711,7 @@ int blkfront_posix_rwop(int fd, uint8_t* buf, size_t > count, int write) > } > > free(copybuf); > - files[fd].blk.offset += rc; > + files[fd].offset += rc; > return rc; > > } > diff --git a/include/lib.h b/include/lib.h > index df2de9e..4d9b14b 100644 > --- a/include/lib.h > +++ b/include/lib.h > @@ -185,6 +185,7 @@ struct evtchn_port_info { > struct file { > enum fd_type type; > bool read; /* maybe available for read */ > + off_t offset; > union { > struct { > /* lwIP fd */ > @@ -193,7 +194,6 @@ struct file { > struct { > /* FS import fd */ > int fd; > - off_t offset; > } file; > struct { > struct evtchn_port_list ports; > @@ -204,7 +204,6 @@ struct file { > } tap; > struct { > struct blkfront_dev *dev; > - off_t offset; > } blk; > struct { > struct kbdfront_dev *dev; > @@ -219,14 +218,12 @@ struct file { > struct { > struct tpmfront_dev *dev; > int respgot; > - off_t offset; > } tpmfront; > #endif > #ifdef CONFIG_TPM_TIS > struct { > struct tpm_chip *dev; > int respgot; > - off_t offset; > } tpm_tis; > #endif > #ifdef CONFIG_XENBUS > diff --git a/lib/sys.c b/lib/sys.c > index e8d5eb2..e1cea70 100644 > --- a/lib/sys.c > +++ b/lib/sys.c > @@ -107,6 +107,7 @@ int alloc_fd(enum fd_type type) > for (i=0; i<NOFILE; i++) { > if (files[i].type == FTYPE_NONE) { > files[i].type = type; > + files[i].offset = 0; > pthread_mutex_unlock(&fd_lock); > return i; > } > @@ -363,25 +364,20 @@ int write(int fd, const void *buf, size_t nbytes) > > off_t lseek(int fd, off_t offset, int whence) > { > - off_t* target = NULL; > switch(files[fd].type) { > #ifdef CONFIG_BLKFRONT > case FTYPE_BLK: > - target = &files[fd].blk.offset; > break; > #endif > #ifdef CONFIG_TPMFRONT > case FTYPE_TPMFRONT: > - target = &files[fd].tpmfront.offset; > break; > #endif > #ifdef CONFIG_TPM_TIS > case FTYPE_TPM_TIS: > - target = &files[fd].tpm_tis.offset; > break; > #endif > case FTYPE_FILE: > - target = &files[fd].file.offset; > break; > default: > /* Not implemented for this filetype */ > @@ -391,10 +387,10 @@ off_t lseek(int fd, off_t offset, int whence) > > switch (whence) { > case SEEK_SET: > - *target = offset; > + files[fd].offset = offset; > break; > case SEEK_CUR: > - *target += offset; > + files[fd].offset += offset; > break; > case SEEK_END: > { > @@ -403,14 +399,14 @@ off_t lseek(int fd, off_t offset, int whence) > ret = fstat(fd, &st); > if (ret) > return -1; > - *target = st.st_size + offset; > + files[fd].offset = st.st_size + offset; > break; > } > default: > errno = EINVAL; > return -1; > } > - return *target; > + return files[fd].offset; > } > > int fsync(int fd) { > diff --git a/tpm_tis.c b/tpm_tis.c > index 4a51027..8a632b1 100644 > --- a/tpm_tis.c > +++ b/tpm_tis.c > @@ -847,7 +847,7 @@ int tpm_tis_send(struct tpm_chip* tpm, uint8_t* buf, > size_t len) { > if(tpm->fd >= 0) { > files[tpm->fd].read = false; > files[tpm->fd].tpm_tis.respgot = 0; > - files[tpm->fd].tpm_tis.offset = 0; > + files[tpm->fd].offset = 0; > } > #endif > return len; > @@ -1290,7 +1290,6 @@ int tpm_tis_open(struct tpm_chip* tpm) > tpm->fd = alloc_fd(FTYPE_TPM_TIS); > printk("tpm_tis_open() -> %d\n", tpm->fd); > files[tpm->fd].tpm_tis.dev = tpm; > - files[tpm->fd].tpm_tis.offset = 0; > files[tpm->fd].tpm_tis.respgot = 0; > return tpm->fd; > } > @@ -1340,13 +1339,13 @@ int tpm_tis_posix_read(int fd, uint8_t* buf, size_t > count) > > > /* Handle EOF case */ > - if(files[fd].tpm_tis.offset >= tpm->data_len) { > + if(files[fd].offset >= tpm->data_len) { > rc = 0; > } else { > - rc = min(tpm->data_len - files[fd].tpm_tis.offset, count); > - memcpy(buf, tpm->data_buffer + files[fd].tpm_tis.offset, rc); > + rc = min(tpm->data_len - files[fd].offset, count); > + memcpy(buf, tpm->data_buffer + files[fd].offset, rc); > } > - files[fd].tpm_tis.offset += rc; > + files[fd].offset += rc; > /* Reset the data pending flag */ > return rc; > } > diff --git a/tpmfront.c b/tpmfront.c > index d825b49..8b2a910 100644 > --- a/tpmfront.c > +++ b/tpmfront.c > @@ -440,7 +440,7 @@ int tpmfront_send(struct tpmfront_dev* dev, const > uint8_t* msg, size_t length) > if(dev->fd >= 0) { > files[dev->fd].read = false; > files[dev->fd].tpmfront.respgot = 0; > - files[dev->fd].tpmfront.offset = 0; > + files[dev->fd].offset = 0; > } > #endif > wmb(); > @@ -539,7 +539,6 @@ int tpmfront_open(struct tpmfront_dev* dev) > dev->fd = alloc_fd(FTYPE_TPMFRONT); > printk("tpmfront_open(%s) -> %d\n", dev->nodename, dev->fd); > files[dev->fd].tpmfront.dev = dev; > - files[dev->fd].tpmfront.offset = 0; > files[dev->fd].tpmfront.respgot = 0; > return dev->fd; > } > @@ -589,14 +588,14 @@ int tpmfront_posix_read(int fd, uint8_t* buf, size_t > count) > } > > /* handle EOF case */ > - if(files[dev->fd].tpmfront.offset >= dev->resplen) { > + if(files[dev->fd].offset >= dev->resplen) { > return 0; > } > > /* Compute the number of bytes and do the copy operation */ > - if((rc = min(count, dev->resplen - files[dev->fd].tpmfront.offset)) != 0) > { > - memcpy(buf, dev->respbuf + files[dev->fd].tpmfront.offset, rc); > - files[dev->fd].tpmfront.offset += rc; > + if((rc = min(count, dev->resplen - files[dev->fd].offset)) != 0) { > + memcpy(buf, dev->respbuf + files[dev->fd].offset, rc); > + files[dev->fd].offset += rc; > } > > return rc; > -- > 2.26.2 > -- Samuel `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, I got those with the system, *for free*".' (By Linus Torvalds)
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