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beegfs: don't fail if output exists 

Use existing output file if it has the desired stripe settings
(number of targets, chunk size)
master
Oliver Steffen 2019-04-29 15:49:57 +02:00
parent d49d345007
commit e3afdb5ed5
1 changed files with 21 additions and 2 deletions
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23
src/aiori-POSIX.c
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@ -201,6 +201,24 @@ bool beegfs_isOptionSet(int opt) {
return opt != -1;
}
bool beegfs_compatibleFileExists(char* filepath, int numTargets, int chunkSize)
{
int fd = open(filepath, O_RDWR);
if (fd == -1)
return false;
unsigned read_stripePattern = 0;
u_int16_t read_numTargets = 0;
int read_chunkSize = 0;
bool retVal = beegfs_getStripeInfo(fd, &read_stripePattern, &read_chunkSize, &read_numTargets);
close(fd);
return retVal && read_numTargets == numTargets && read_chunkSize == chunkSize;
}
/*
* Create a file on a BeeGFS file system with striping parameters
*/
@ -247,8 +265,9 @@ bool beegfs_createFilePath(char* filepath, mode_t mode, int numTargets, int chun
char* filenameTmp = strdup(filepath);
char* filename = basename(filepath);
bool isFileCreated = beegfs_createFile(parentDirFd, filename,
mode, numTargets, chunkSize);
bool isFileCreated = beegfs_compatibleFileExists(filepath, numTargets, chunkSize)
|| beegfs_createFile(parentDirFd, filename,
mode, numTargets, chunkSize);
if (!isFileCreated)
ERR("Could not create file");
retVal = true;